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Clinical and Diagnostic Laboratory Immunology, July 2001, p. 678-685, Vol. 8, No. 4
1071-412X/01/$04.00+0 DOI: 10.1128/CDLI.8.4.678-685.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
MINIREVIEW
Celiac Disease-Associated Autoimmune
Endocrinopathies
Vijay
Kumar,1,2,*
Manoj
Rajadhyaksha,1 and
Jacobo
Wortsman3
IMMCO Diagnostics,
Inc.,1 and Departments of Microbiology
and Dermatology, University at Buffalo, SUNY,2
Buffalo, New York, and Department of Internal Medicine,
School of Medicine, Southern Illinois University, Springfield,
Illinois3
 |
ABSTRACT |
Celiac disease (CD) is an autoimmune disorder induced by gluten
intake in genetically susceptible individuals. It is characterized by
the presence of serum antibodies to endomysium, reticulin, gliadin, and
tissue transglutaminase. The incidence of CD in various autoimmune
disorders is increased 10- to 30-fold in comparison to the general
population, although in many cases CD is clinically asymptomatic or
silent. The identification of such cases with CD is important since it
may help in the control of type I diabetes or endocrine functions in
general, as well as in the prevention of long-term complications of CD,
such as lymphoma. It is believed that CD may predispose an individual
to other autoimmune disorders such as type I diabetes, autoimmune
thyroid, and other endocrine diseases and that gluten may be a possible
trigger. The onset of type I diabetes at an early age in patients with
CD, compared to non-CD, and the prevention or delay in onset of
diabetes by gluten-free diet in genetically predisposed individuals
substantiates this antigen trigger hypothesis. Early identification of
CD patients in highly susceptible population may result in the
treatment of subclinical CD and improved control of associated disorders.
 |
INTRODUCTION |
Autoimmunity as a concept evolved
from the beginning of this century, when Ehrlich and Morgenroth
(26) introduced the phenomenon of "horror
autotoxicus," i.e., fear of self-poisoning. Subsequently, many
diseases were recognized with etiology arising from the abnormal reaction of the immune system to self antigens. These observations laid
the foundation for establishing postulates that are characteristic of
an autoimmune disease (4, 7). Since then, several
hypotheses have been put forward regarding the mechanisms of
autoimmunity (22, 76, 84, 110, 118).
In general, autoimmune disorders can be classified as either organ
specific or non-organ specific. In organ-specific autoimmune diseases,
the autoantibodies are specifically directed against antigens localized
in a particular organ and are often detected in circulation. Examples
of organ-specific autoimmunity include Hashimoto's thyroiditis, type I
diabetes, and myasthenia gravis.
In contrast, the non-organ-specific autoimmune disorders are
characterized by the presence of autoantibodies directed against ubiquitous antigens (not specific to a particular organ). This results
in the involvement of several organs and is often characterized by the
presence of specific circulating immune complexes. Non-organ-specific autoimmunity includes diseases such as systemic lupus erythematosus (SLE), rheumatoid arthritis (RA), and scleroderma.
Epidemiologic studies have shown that genetic factors are involved in
host susceptibility to autoimmune disease. For example, the concordance
rate of a particular autoimmune diseases is much higher in monozygotic
twins in comparison to fraternal twins (17). Moreover,
this incidence is much higher in organ-specific autoimmune disorders in
comparison to non-organ-specific disorders. Thus, in Grave's
thyrotoxicosis, Hashimoto's disease, and type I diabetes, the
concordance rate of the clinical condition is as high as 50% in
monozygotic twins, whereas in non-organ-specific autoimmune disorders
such as SLE and RA 10% of identical twins are affected (64). Among the genetic factors associated with
autoimmune diseases, the best characterized are major
histocompatibility complex (MHC) class I and class II genes. The
present review will focus on factor(s) involved in the pathogenesis of
celiac disease (CD) and its coexistence with autoimmune endocrine disorders.
 |
CD |
CD is an enteropathy affecting mainly the proximal small intestine
and is due to intolerance to gliadin, a cereal protein present
primarily in wheat. The classical symptoms of CD are diarrhea, weight
loss, and malnutrition. The severity of gastrointestinal symptoms and
clinical signs generally are a reflection of the degree of intestinal
malabsorption. Thus, patients with limited mucosal involvement may be
devoid of gastrointestinal symptoms but not necessarily spared from
extraintestinal complications such as anemia or ostopenia caused by
malabsorbtion of iron and/or folate and calcium, respectively. In
addition to the variable clinical presentations, several studies have
reported a variable clinical course, where the CD symptoms would first
appear in infancy with spontaneous remission during adolescence and
recurrence at a later stage. Accurate diagnosis of patients with
symptomatic or asymptomatic CD is therefore important because strict
adherence to a gluten-free diet may prevent neoplastic and systemic
complications associated with the disease (28, 31, 62, 74, 75,
94, 115). It has also been suggested that a gluten-free diet
instituted on patients with CD early in life would prevent development
of type I diabetes in genetically predisposed patients (56, 58, 93).
CD shares many features with autoimmune disorders in general, such as a
polygenic mode of inheritance, a strong association with HLA-DQ2 and
HLA-DQ8 antigens, the production of a local inflammatory response
(lymphocyte infiltration and cytokine production), the presence of
autoantibodies in the circulation, female preponderance, and an
association with other autoimmune diseases (1, 2, 11, 14, 19, 30,
33, 88, 91, 92, 97, 104). There is a strong association of CD
with HLA class II molecules with >90% of CD patients having the
HLA-DQ
1*0501,
1*0201 heterodimer (19, 88, 91, 92,
117).
 |
AUTOIMMUNE ENDOCRINE DISORDERS AND CD |
Insulin-dependent diabetes mellitus.
Insulin-dependent (type
I) diabetes is an autoimmune disorder characterized by destruction of
insulin-producing pancreatic
cells. Type I diabetes primarily
affects children and accounts for 10 to 15% of the patients with
diabetes. In the United States, a total of approximately 120,000 individuals have type I diabetes (108). Type I diabetes
elicits both humoral and cellular immunity characterized by the
presence of
-cell-specific autoantibodies and cytotoxic T cells.
These autoimmune responses in type I diabetes are not restricted to
pancreatic antigens and may also be directed against other autoantigens
residing in the thyroid and adrenal glands (26). While
there are some indications that type I diabetes may be triggered and
possibly accelerated by environmental factors, a 30% concordance rate
between monozygotic twins indicates a strong underlying genetic influence.
Genetic susceptibility to type I diabetes has been attributed to more
than one gene. The major influence on susceptibility for type I
diabetes is imparted by genes mapped to the histocompatibility leukocyte antigen (HLA) locus. The HLA locus maps to chromosome 6 in
humans
specifically to 6p21.3, where it is localized to a region of
DNA approximately 3 million base pairs (15). This region
contains genes for the two major classes of HLA molecules (class I and
class II); for the complement components C2, C4, factor B, and
21-hydroxylase; and for tumor necrosis factors alpha and beta. HLA A,
B, and C genes control the expression of surface antigens representing
class I gene. These molecules are found on all nucleated cells and
platelets. The class II region encodes genes that cover approximately 1 million base pairs of the MHC (15). This region is divided
into three major subregions: DR, DQ, and DP, where each encodes for at
least one pair of
and
chains. Both class I and class II
molecules are polymorphic. This polymorphism is further enhanced by the
haplotype combinations produced by the mixing of
- and
-chain
alleles within the same haplotype; a third level of HLA diversity is
obtained by allelic recombination, i.e., mixing the HLA allele products
within an individual. For example, the DQ
chain of each haplotype
can pair with the DQ
chain from the same haplotype
("cis" pairing) or the opposite encoded haplotype
("trans" pairing). The resulting hypervariability is
fundamental for the development of immune protection of a living
organism against infectious agents. Each of the variabilities
introduced in these molecules is designed to select, bind, and present
peptides to the immune system for maximal effectiveness of the
consequent reaction.
Since the antigen presentation for T helper cells and antibody
production is mediated by the HLA class II molecules, it is
not
surprising to find that the susceptibility traits of various
autoimmune
diseases were mapped to different alleles of these
genes. In the case
of type I diabetes, an inheritable disorder
thought to be of autoimmune
etiology, possibly triggered by viral
infection, approximately 60% of
the genetic predisposition is
related to the HLA gene, while the other
40% is not HLA associated
(
18,
45). These results have
been confirmed in various ethnic
communities studied for their genetic
linkage with type I diabetes.
The emerging consensus is that the type I
diabetes susceptibility
trait is associated with the DR3 molecule with
the DRB1*0301
chain and the DQ2 molecule with the DQA1*0501

chain and the
DQB1*0201

chain (
9,
32). Thus,
although it was initially
believed that DR3 was the major molecule
influencing the susceptibility
to type I diabetes, it was found that it
is actually the DQ2 molecule
that influences the selection and binding
to autoantigenic peptides
(
77). The apparent DR3 and type
I diabetes association was merely
due to linkage disequilibrium with
the DQ2

and

genes. In this
regard, the aspartic acid residue at
position 57 of the DQ

chain
is extremely important since its
presence confers resistance (DQ

3.1
allele), while its absence
(DQ

3.2 allele) promotes susceptibility
to type I diabetes. Besides
the class II genes, it is now clear
that there are other minor genetic
components outside the HLA
complex (the putative IDDM6 or diabetes 1 susceptibility gene)
that do influence susceptibility to type I
diabetes (
86). Approximately
two-thirds of type I diabetes
patients have a specific predisposing
HLA allele, although some of
these alleles may not have full penetrance
(i.e., do not elicit
disease). A person with the predisposing
allele DQ8 or DQ2 with a
family history of type I diabetes has
a 25% risk of getting this
disease (
99). Most interestingly,
the same DQ2 molecule is
associated with susceptibility to CD,
suggesting the possibility that
an individual may be susceptible
to both CD and type I diabetes due to
the inheritance of a single
HLA haplotype. The HLA-DQ molecules differ
from other MHC class
II molecules in several aspects; mainly, in HLA-DQ
molecules both
polypeptide chains are polymorphic (
99).
The DQ

chain contains
a hypervariable loop between residues 48 and
56, which is one
of the most hypervariable structures known. An
interesting feature
about this loop is that in some

alleles it ends
in such a manner
that it creates a deletion mutation of an arginine at
either position
55 or position 56. This, in turn, influences the
adjacent first
peptide binding pocket (P1) in the peptide-binding
groove of the
DQ2 molecule. Thus, extra hypervariability is generated,
depending
on which of the two arginines is
deleted.
There have been several studies indicating an association between type
I diabetes and CD (
12,
13,
16,
21,
29,
34,
35,
43,
44,
47,
48,
51,
53,
59,
61,
62,
66,
68,
71,
78,
80,
81,
83,
100,
106,
112,
114,
116).
(Table
1). Clinically, the
coexistence of CD and type I diabetes
is difficult to ascertain since
many type I diabetes patients
may have asymptomatic or occult CD. The
prevalence of CD in type
I diabetes patients is 10 to 30 times that in
normal population.
It is in fact desirable that CD, in such a highly
susceptible
population, is recognized, since a gluten-free diet may
result
in (i) better control of diabetes and (ii) decreased frequency
of insulin reactions. The disappearance of diabetic instability
after
the introduction of a gluten-free diet in such patients
emphasizes the
importance of the early recognition and identification
of CD.
There have been many studies performed to determine the incidence of CD
coexisting with diabetes (
12,
13,
16,
21,
29,
34,
35,
43,
44,
47,
48,
51,
53,
59,
61,
62,
66,
68,
71,
78,
80,
81,
83,
100,
106,
112,
113,
114,
116). An incidence of 2 to 8.5% has been reported,
depending upon the diagnostic criteria used for CD. If the clinical
and/or biopsy criteria are employed, this incidence of coexistence
is
on the low side, i.e., 2%. However, if serological criteria
are used,
incidences as high as 8 to 9% have been reported. This
is obviously
due to the fact that many cases of CD are asymptomatic
and the gut
morphological changes may be minimal and so cannot
be recognized
histologically. These findings have been documented
by the studies of
Chorzelski et al. (
13,
14), in which the
sensitivity of
morphological gut changes was enhanced either by
the administration of
an increase in dietary gluten content or
by the taking of multiple
biopsy samples. Serological tests, such
as use of the endomysial
antibody, are virtually 100% sensitive
and specific for diagnosing
both symptomatic and asymptomatic,
but untreated CD, especially when
performed in an established
laboratory experienced in performing
serological tests for CD
(
23,
25,
82).
The association between CD and type I diabetes could be explained by
the sharing of a common genetic factor or by one of the
diseases being
a pathogenic consequence of the other. This question
was addressed by
Pocecco and Ventura (
79), who evaluated 4,500
type I
diabetes cases from 19 different centers in Italy. These
authors
identified "silent" CD cases in type I diabetes individuals
by
using celiac-specific serology, followed by a jejunal biopsy
confirmation. They observed that their patients primarily fell
into two
categories: group I consisted of patients diagnosed with
type I
diabetes who were later diagnosed as "silent celiacs" and
group II
consisted of patients with prediagnosed CD that was later
found to be
complicated with type I diabetes. Group I included
88% of all
dual-diagnosis cases with minimal gastrointestinal
problems and who
were 11 to 17 years of age at the diagnosis of
CD. Group II included
12% dual-diagnostic cases; the mean age
of the subjects at diagnosis
was younger than that for group I
(6 to 10 years), and these cases
experienced maximum gastrointestinal
symptoms. While increased severity
of type I diabetes symptoms
leads to its earlier diagnosis of
insulin-dependent diabetes mellitus,
the lack of severity of symptoms
and repercussions of silent CD
delays its diagnosis. These observations
therefore suggest a lack
of specific precedence for one of the diseases
over the other.
Since this is not the case, there is equal likelihood
for CD to
precede type I diabetes and vice
versa.
From the above observations, it is apparent that disease-related
pathogenicity is not responsible for the association between
CD and
type I diabetes. Recently, considerable evidence has accumulated
that
genetic factors may elucidate not only the coexistence of
CD and type I
diabetes but also its association with other autoimmune
disorders. The
key role of DQ2 molecules was evaluated by Vartdal
et al.
(
110), who studied the amino acid residues determinant
of
binding affinity at different binding pockets. Using natural
peptides
eluted from purified DQ2 molecules and synthetic variant
peptides in
binding assays, Vartdal et al. (
110) found that the
DQ2
molecules have residues at relative positions of P1, P4, P6,
P7, and P9
that interact critically with amino acid residues of
the peptide. These
anchor positions did determine the affinity
of the peptide interacting
with a given class II molecule, and
formation of high affinity
peptide-class II complexes were essential
for the formation of
long-term stable complex. This is important
because these long-term
stable complexes are necessary for initiating
an effective T helper
cell
response.
Point mutation studies and amino acid replacement studies showed that
P1 preferred the binding of positively charged residues
such as lysine,
P4 preferred smaller aliphatic side chain amino
acids such as alanine
and isoleucine, and P6 position favored
a negatively charged residue,
whereas the C-terminal P9 anchor
favored the juxtaposition of a bulky
phenylalanine residue. An
aspartate-57 residue located in the groove of
the fourth peptide-binding
pocket (P4) could form a salt bridge with
arginine-79 residue
in the

chain, thereby decreasing the size of
the pocket and
changing the positive charge in the pocket. The DQ2 and
DQ8 molecules
responsible for the increased susceptibility to type I
diabetes
and other autoimmune diseases are devoid of an aspartate-57
residue.
Residue 57 DQ

seems to be critical for peptide binding,
T-cell
recognition, and stability of the MHC class heterodimer on the
cell surface (
24). Peptides that have the favorable
sequences
of amino acids, fulfilling the stringent conditions of the
DQ2
peptide binding pockets, will bind avidly and generate a Th2 cell
response, which in turn leads to maturity and proliferation of
the
antibody
response.
In CD, the autoimmune responses have been studied in gliadin-specific T
cells isolated from the celiac lesions of the intestinal
mucosa
(
60). A majority of these T-cell lines were DQ2
restricted.
Using such T-cell lines, CD-specific

- and

-gliadin
epitopes
have been delineated (
40). Most importantly, the
criteria for
gliadin-peptide binding to the DQ2 molecule have been
shown to
be fulfilled after deamidation (modification) of these
peptides
by tissue transglutaminase (
67). In type I
diabetes, the pathogenic
insulin, GAD, and ICA512 probably provided
active T-cell help
by peptides derived from each of these antigens.
Linkage analysis
of type I diabetes-specific antibodies and HLA-DR and
-DQ phenotypes
showed that anti-ICA512 antibodies are associated
strongly with
DR3 alleles, while the anti-GAD and anti-insulin
antibodies are
associated with DQ2 alleles. This suggests that the DQ2
molecule
may actually promote the T-cell help required to generate
anti-GAD
and anti-insulin
antibodies.
Similarities in peptide sequences may lead to a cross-reaction of
epitopes at the T-cell level, but it is unclear whether
such short
sequence similarities exists between gliadin or tTG
and GAD or insulin.
If cross-reactivity does exist, the coexistence
of type I diabetes and
CD can be explained by "molecular mimicry."
External stimuli that
can provide such molecular mimicry are represented
by various viral
proteins such as human cytomegalovirus protein
IE2 and the Epstein-Barr
virus gp110 protein that may initiate
autoimmune disease
(
107). Thus, gliadin may have certain residues
directly
cross-reacting with sequences on insulin or GAD. Since
both of these
responses would be mediated through DQ2 molecules,
the coinitiation and
maintenance of an anti-gliadin Th cell response
would provide T-cell
help to CD-specific antibodies (anti-tTG,
anti-EMA, anti-reticulin) and
also aid in the production of type
I diabetes-specific
antibodies.
Thyroid autoimmunity.
Thyroid autoimmunity is common and is
due to an apparent immune reaction directed against self antigens of
the thyroid. Three thyroid diseases are considered to have autoimmune
etiology: Hashimoto's thyroiditis, idiopathic myxedema, and
Grave's disease. The antigens against which the autoimmune
reactions are directed to produce thyroid autoimmune disease include
thyroglobulin (Tg), thyroid peroxidase (TPO), and the TSH receptor
(5, 37, 38, 49, 65, 70, 73, 89, 96, 113). These
autoantibodies cause direct thyroid dysfunction, as in Grave's disease
caused by antibodies to the TSH receptor, or a destructive process, as
in Hashimoto's thyroiditis and idiopathic myxedema.
CD and autoimmune thyroid disorders share a common genetic
predisposition, namely, the DQ2 allele. This common predisposing
genetic background would explain the higher incidence of thyroid
autoimmune disorders in CD than in the general population. Because
of
the varied clinical presentations of CD, serological methods
have been
found to be very useful for detecting its existence
in patients with
thyroid autoimmunity. This association has been
the subject of several
investigations (
5,
37,
38,
49,
65,
70,
73,
89,
96,
113)
(Table
2). These studies
include
determining the occurrence of CD in thyroid patients,
whereas other
investigations focused on the incidence of thyroid
autoimmunity in
patients with CD. For example, Collin et al. (
16)
studied
83 patients with autoimmune thyroid disease by determining
the presence
of serum endomysial antibodies and found five to
be positive for CD.
Four of these five endomysial antibody-positive
patients had, in fact,
small bowel villous atrophy. Of 275 aged-matched
controls included in
the study, two cases were positive for endomysial
antibodies: one with
a solitary nonfunctioning thyroid nodule
and one who was a healthy
blood donor. Both cases also had villous
atrophy consistent with CD.
Thus, the frequency of CD in patients
with autoimmune thyroid disease
is 4.3% compared to nonautoimmune
thyroid controls of 0.4%. The
prevailing rate of CD of one in
300 among blood donors is similar to
that determined in various
epidemiological studies. Among 136 cases of
autoimmune thyroid
disorders studied in our laboratory, we found three
cases to be
positive for endomysial antibodies. None of the 71 controls
with
nonautoimmune thyroid disorders (thyroid cancer and nodular
goiter)
had a positive serological antibody test for CD. The converse
study, i.e., the incidence of autoimmune thyroid disease in CD,
was
investigated by Velluzi et al. (
111). They performed
thyroid
antibody tests and thyroid echography in 47 patients with CD
and
91 healthy controls and found that CD patients had a three- to
fourfold increase in the incidence of thyroid autoimmunity. They
further determined that CD patients who were positive for DQ*1
0502/DQ

1*0102 had an increased prevalence of thyroid autoimmunity.
Since a high incidence of DQB1*0502 has also been associated
with
CD, it is possible that genetic commonality may underlie the
association
of thyroid autoimmunity to CD. Amino acids 632 to 645 in
the TPO
peptide bind with high affinity to DQ2 molecules bearing
correct
residues as per the binding motif of the DQ2 molecules. As
mentioned
already, gliadin binds to the same pocket suggesting that
this
molecular mimicry could explain the coexistence of CD with thyroid
disorders.
Parathyroid.
Idiopathic hypoparathyroidism is considered to be
an autoimmune disorder characterized by the presence of autoantibodies
against parathyroid antigens and its association with other autoimmune disorders (6, 8, 10, 39, 72, 98, 105). Idiopathic hypoparathyroidism of onset in childhood is commonly associated with
hypofunction of other endocrine organs. This is due to the presence of
autoantibodies against antigen(s) of the organs affected, thus defining
the syndrome of autoimmune polyglandular type I syndrome that involves
the adrenal glands, pancreas, gonads, and pituitary and thyroid glands
(111). Several studies have reported an association of
idiopathic hypoparathyroidism with CD (6, 8, 10, 39, 72, 98,
105). CD has been reported to be associated with both hypo- and
hyper (both primary and secondary)-parathyroidism. CD has been
associated with significant bone loss and hypocalcemia. Most CD
patients with bone loss and hypocalcemia have secondary hypoparathyroidism. A gluten-free diet in patients with CD with secondary hyperparathyroidism has been reported to result in normal bone mineral density. Therefore, the presence of hypocalcemia or
normocalcemic hyperparathyroidism should prompt an examination for CD. Treatment with a gluten-free diet should result in clinical improvement and restoration of normal calcium levels. It is thus recommended that patients with idiopathic hypo- and hyperparathyroidism be routinely investigated for autoimmune polyendocrinopathy and that
calcium homeostasis be monitored closely after the institution of a
gluten-free diet for CD.
Addison's disease.
Addison's disease is an autoimmune
disorder characterized by the presence of autoantibodies to antigens in
the adrenal cortex (57, 111). Adrenal cortex antibodies
are directed against the steroidogenic enzyme 21-hydroxylase (36,
41, 95). Almost all normal but adrenal antibody-positive
subjects will go on to develop Addison's disease with time, and the
progression of the disease correlates positively with the antibody
titers. A statistically significant association between Addison's
disease and CD has been described (102). Since Addison's
disease is rather uncommon, the association of Addison's disease with
CD may not be coincidental. In a recent study, Heneghan et al.
(35) found two cases of Addison's disease who also had
selective IgA deficiency. The reported incidence of Addison's disease
in European epidemiological studies is three to six cases per 100,000 population and, hence, finding two Addison's disease patients among
700 CD patients (relative increase of 100-fold) provides strong support
for a true association. Thus, it is suggested that patients with
Addison's disease may be prone to subclinical CD and should be
screened by serological methods.
Elegant studies have been performed to assess a genetic involvement in
the progression of Addison's disease. These studies
looked at the
association of Addison's disease, the presence of
21-hydroxylase
autoantibodies, and DQ2 or DQ8 class II molecules
(
27). It
was shown that DQ8
+ patients with 21-hydroxylase
autoantibodies had clinical Addison's
disease. It is noteworthy that
DQ8 molecules are very similar
in their sequence and their structure to
the DQ2 molecules. The
DQ2 and DQ8 molecules, which are
positively associated with many
autoimmune disease, have
different surface electrostatic charges
from the negatively associated
DQ6 molecules. It is known that
structural features, such as the
hydrophilicity of the first pocket,
the

49-55 dimerization patch,
the CD4 binding region

134-138,
or the

167-169 RGD loop,
influence peptide binding as well as
T-cell stimulation function in the
DQ molecules. The peptide binding
motif of DQ2 and DQ8, although
similar, are not identical. Therefore,
analogue composition and
structural confines on sequences derived
from gliadin, tissue
transglutaminase, or 21-hydroxylase may lead
to a molecular
cross-reactivity between these antigens at the
T-cell level. However,
the gliadin peptides that bind avidly to
DQ2 can theoretically bind DQ8
with slightly lower affinity, determining
disease susceptibility. We
speculate that the gliadin peptide-MHC
complexes can effectively
overcome the T-cell activation threshold
and induce the
21-hydroxylase-specific T cells to elicit a specific
autoimmune
response (Addison's
disease).
Polyglandular autoimmunity.
Autoimmune polyglandular syndrome
is a rare endocrine disorder comprising a combination of at least two
of the following autoimmune endocrine disorders: Addison's disease,
autoimmune thyroid diseases, hypoparathyroidism, type I diabetes, or
primary gonadal failure (20, 42, 46, 90). In addition,
nonendocrine diseases that have been described in autoimmune
polyglandular syndrome include mucocutaneous candidiasis, vitiligo,
alopecia, pernicious anemia, autoimmune hepatitis, primary biliary
cirrhosis, and intestinal malabsorption. The autoimmune polyglandular
syndrome can be classified into three different groups. Malabsorption
is commonly associated with one of them (type I autoimmune
polyglandular syndrome). The association of malabsorption with
types II and III has not been clearly established. It is thought that
the malabsorption associated with type I autoimmune polyglandular
syndrome is due to CD. Two case studies (57, 111) have
been reported of autoimmune polyglandular syndrome and CD. Based upon
the HLA haplotype analysis (DQ8 predominance), the association may
represent genetic predisposition rather than casual association.
Infertility.
CD is associated with infertility and miscarriage
(52, 54, 85), and a gluten-free diet in such cases is
associated with a substantial reduction of abortions, in the frequency
of low-birth-weight infants and with an increased duration of breast
feeding. In a study conducted by Lewis et al. (52), the
incidence of subclinical CD was determined in patients with infertility
and recurrent miscarriage. A total of 150 women examined for
infertility, 50 women with two or more subsequent abortions, and 150 females as a control group were examined for CD by serological tests.
Four (4%) of the women in the unexplained infertility group but none
in the control group were found to have CD. This observed frequency of
4% is at least 10 times higher than the incidence of CD in the general
population. From these and other studies, it is obvious that CD is a
risk factor for infertility resulting in (i) a deficiency or lack of micronutrients, vitamins, etc.; (ii) an increased frequency of endocrinological and autoimmune diseases; and (iii) a shortened reproductive period, with delayed menopause and early menopause. Thus,
women with unexplained infertility should be screened for CD. Indeed,
an increased frequency of successful deliveries has been reported after
a gluten-free diet was started in such cases. In conclusion, CD should
be suspected in women with spontaneous abortions, low-birth-weight
newborns, and/or short or no lactation, even if malabsorption is
clinically absent.
 |
CONCLUSIONS |
As elaborated in earlier sections, CD may coexist with several
extraintestinal diseases. This association can be theorized based on a
universal explanation of the clinical association based on
cross-reactivities or molecular mimicry of antigens on a common class
II DQ2 molecule. Because of the more extensive experience with the
association between CD and type I diabetes, we believe we can reconcile
the observations into two separate, compatible models.
In the first one, which we favor, the enzyme tissue transglutaminase
has a central role. Tissue transglutaminase is a ubiquitous enzyme
controlling apoptosis and the target for anti-tissue transglutaminase antibodies resulting from CD. These antibodies can bind to tissue transglutaminase and interfere with its physiological functions (3). Such functional derangement has been confirmed by a
reduction in cross-linking activity that is associated with the
presence of autoantibodies to tissue transglutaminase. This
antibody-mediated interference of tTG activity results in abnormal
accumulation of double-stranded DNA and lactate dehydrogenase in blood,
which may lead to a necrotizing effect due to deregulated apoptosis. We
propose that, due to deregulated apoptosis, certain tissue-specific endogenous proteins are released locally. In support of this
interpretation are the reports indicating the presence of
autoantibodies against substrate proteins with which tissue
transglutaminase would normally react (101, 109). In light
of this observation, it is tempting to speculate that tissue
transglutaminase may normally modify these "tissue-specific"
proteins and that, when tissue transglutaminase is inactivated by
autoantibodies, targets for the class II molecules are generated that
bind and present to the immune system as autoepitopes. This would
trigger another specific autoimmune disease besides CD.
How do type I diabetes and other organ-specific autoimmune disorders
associate with CD? We may elaborate this concept further, with type I
diabetes as the primary example. It is well established that, in type 1 diabetes, the initial
-cell attack by CD8+ cytotoxic T
cells causes destruction of these cells. Such an injury to the
cells can also be initiated by anti-tissue transglutaminase antibodies.
This will invariably expose the endogenous GAD and insulin molecules to
the exogenous antigen presentation pathway. Similarly, in CD patients,
the anti-tissue transglutaminase antibodies may lead to interruption of
the tissue transglutaminase functions as described above. In either
case (type 1 diabetes or CD), there is an opportunity for tissue
transglutaminase to interact with islet-specific antigens such as GAD
and insulin. The tissue transglutaminase may now modify the
diabetogenic antigens (GAD or insulin). During the deamidation
(modification) process, tissue transglutaminase may make
"neoepitopes" of GAD- and insulin-derived peptides. Such modifications may then lead to the appearance of peptides with sequences that satisfy the DQ2 peptide-binding motif. Hence, the subsequent presentation of these peptides (derived from GAD and insulin) to the DQ2 molecules forces the immune system to prime T cells
that can now recognize "self" endogenous proteins such as GAD and
insulin, eliciting type I diabetes-specific B- and T-cell response. It
should be emphasized that proteins such as GAD or insulin may not
posses any immunodominant T-cell autoepitope, yet the systematic and
stepwise deamidation process at glutamine residues (by tissue
transglutaminse) may promote the modified peptides to bind to DQ2
molecules. This model explains the propensity of DQ2-bearing patients
to have a dual diagnosis of CD and type I diabetes. It is also in
agreement with observations that CD or type I diabetes may arise in
patients with a dual diagnosis in a mutually exclusive manner.
The novel physiological functions that tTG performs and their relation
to the disease process, coupled with the coexistence of CD with several
other autoimmune disorders, underscores the importance of CD as a model
autoimmune disorder. We strongly believe that CD may yet play a
critical role in the understanding of autoimmune responses.
 |
FOOTNOTES |
*
Corresponding author. Mailing address: IMMCO
Diagnostics, Inc., 60 Pineview Dr., Buffalo, NY 14228. Phone: (716)
691-0091. Fax: (716) 691-0466. E-mail:
vkumar{at}immcodiagnostics.com.
 |
REFERENCES |
| 1.
|
Acerini, C. L.,
M. L. Ahmed,
K. M. Ross,
P. B. Sullivan,
G. Bird, and D. B. Dunger.
1998.
Coeliac disease in children and adolescents with IDDM: clinical characteristics and response to gluten free diet.
Diabetes Med.
15:38-44[CrossRef][Medline].
|
| 2.
|
Ada, G. L., and N. R. Rose.
1988.
Short analytical review: the initiation and early development of autoimmune disease.
Clin. Immunol. Immunopathol.
41:3-9.
|
| 3.
|
Adams, D.
1996.
How the immune system works and why it causes autoimmune diseases.
Immunol. Today
17:300-307[CrossRef][Medline].
|
| 4.
|
Adyel, F. Z.,
B. Hentati,
A. Boulila,
J. Hachicha,
T. Ternynck,
S. Avrameas, and H. Ayadi.
1996.
Characterization of autoantibody activities in sera anti-DNA antibody and circulation immune complexes from 12 systemic lupus erythematosus patients.
J. Clin. Lab. Anal.
10:451-457[CrossRef][Medline].
|
| 5.
|
Albani, S.,
D. A. Carson, and J. Reudier.
1992.
Genetic and environmental factors in the immune pathogenesis of rheumatoid arthritis.
Rheum. Dis. Clin. No. Am.
18:729-740.
|
| 6.
|
Bao, F.,
L. P. Yu,
S. Babu,
T. Wang,
E. J. Hoffenberg,
M. Rewers, and G. S. Eisenbarth.
1999.
One third of HLA DQ2 homozygous patients with type I diabetes express celiac disease-associated transglutaminase autoantibodies.
J. Autoimmun.
13:143-148[CrossRef][Medline].
|
| 7.
|
Betterle, C.,
N. A. Greggio, and M. Volpato.
1998.
Clinical review 93: autoimmune polyglandular syndrome type I.
J. Clin. Endocrinol. Metab.
83:1049-1055[Free Full Text].
|
| 8.
|
Beutner, E. H.,
O. Hallstrom,
T. P. Chorzelski,
V. Kumar,
A. Burgin-Wplff, and J. Sulej.
1990.
Standardization of endomysial, reticulin, and gliadin antibody tests for the diagnosis of gluten-sensitive enteropathy, p. 165-191.
In
T. P. Chorzelski, E. H. Beutner, V. Kumar, and T. K. Zalewski (ed.), Serologic diagnosis of celiac disease. CRC Press, Boca Raton, Fla.
|
| 9.
|
Bose, S. K.,
J. P. Lacour,
I. Bodokh, and J. P. Ortonne.
1994.
Malignant lymphoma and dermatitis herpetiformis.
Dermatology
188:177-181[Medline].
|
| 10.
|
Boudraa, G.,
W. Hachelaf,
M. Benbouabdellah,
M. Kelkadi,
F. Z. Benmansour, and M. Touhami.
1996.
Prevalence of coeliac disease in diabetic children and their first-degree relatives in West Algeria: screening with serological markers.
Acta Paediatrica Suppl.
85:58-60.
|
| 11.
|
Boy, M. F.,
G. La Nasa,
A. Balestrieri,
M. V. Cerchi, and P. Usai.
1995.
Distribution of HLA-DPB1, DQB2, DQA1 alleles among Sardinian celiac patients.
Dis. Markers
12:199-204[Medline].
|
| 12.
|
Calero, P.,
C. Ribes-Koninckx,
V. Albiach,
C. Carles, and J. Ferrer.
1996.
IgA anti-gliadin antibodies as a screening method for non-overt celiac disease in children with insulin-dependent diabetes mellitus.
J. Pediatr. Gastroenterol. Nutr.
23:29-33[CrossRef][Medline].
|
| 13.
|
Chorzelski, T. P.,
E. H. Beutner,
O. Hallstrom,
V. Kumar, and T. Reunala.
1990.
Relative sensitivity and specificity of serodiagnostic tests for gluten-sensitive enteropathy comments, p. 141-142.
In
T. P. Chorzelski, E. H. Beutner, V. Kumar, and T. K. Zalewski (ed.), Serologic diagnosis of celiac disease. CRC Press, Boca Raton, Fla.
|
| 14.
|
Chorzelski, T. P.,
D. Rosinska,
E. H. Beutner,
J. Sulej, and V. Kumar.
1988.
Aggressive gluten challenge of dermatitis herpetiformis cases converts them from seronegative to seropositive for IgA-class endomysial antibodies.
J. Am. Acad. Dermatol.
18:672-678[Medline].
|
| 15.
|
Collin, P.,
T. Salmi,
O. Hallstrom,
T. Reunala, and A. Pasternack.
1994.
Autoimmune thyroid disorders and coeliac disease.
Eur. J. Endocrinol.
130:137-140[Abstract/Free Full Text].
|
| 16.
|
Collin, P.,
S. Vilska,
P. K. Heinonen,
O. Hallstrom, and P. Kikkarainen.
1996.
Infertility and coeliac disease.
Gut
39:382-384[Abstract/Free Full Text].
|
| 17.
|
Congia, M.,
F. Cucca,
F. Frau,
R. Lampis,
L. Melis,
M. G. Clemente,
A. Cao, and S. De Virgiliis.
1994.
A gene dosage effect of the DQA1-*-0501/DQB1-*-0201 allelic combination influences the clinical heterogeneity of celiac disease.
Hum. Immunol.
40:138-142[Medline].
|
| 18.
|
Counsell, C. E.,
A. Taha, and W. S. J. Ruddell.
1994.
Coeliac disease and autoimmune thyroid disease.
Gut
35:844-846[Abstract/Free Full Text].
|
| 19.
|
Cronin, C. C.,
A. Feighery,
B. Ferriss,
C. Liddy,
F. Shanahan, and C. Feighery.
1997.
High prevalence of celiac disease among patients with insulin-dependent (type I) diabetes mellitus.
Am. J. Gastroenterol.
92:2210-2212[Medline].
|
| 20.
|
Cronin, C. C., and F. Shanahan.
1997.
Insulin-dependent diabetes mellitus and coeliac disease.
Lancet
349:1096-1097[CrossRef][Medline].
|
| 21.
|
Cucca, F.,
F. Muntoni,
R. Lampis,
F. Frau,
L. Argiolas,
M. Silvetti,
E. Angius,
A. Cao,
S. De Virgiliis, and M. Congia.
1993.
Combinations of specific DRB1, DQA1, DQB1 haplotypes are associated with insulin-dependent diabetes mellitus in Sardinia.
Hum. Immunol.
37:85-94[Medline].
|
| 22.
|
Cuoco, L.,
G. Cammarota,
A. Tursi,
A. Papa,
M. Certo,
R. Cianci,
G. Fedeli, and G. Gasbarrini.
1998.
Disappearance of gastric mucosa-associated lymphoid tissue in coeliac patients after gluten withdrawal.
Scand. J. Gastroenterol.
33:401-405[CrossRef][Medline].
|
| 23.
|
Cuoco, L.,
M. Certo,
R. A. Jorizzo,
I. DeVitis,
A. Tursi,
A. Papa,
L. DeMarinis,
P. Fedeli,
G. Fedili, and G. Gasbarrini.
1999.
Prevalence and early diagnosis of coeliac disease in autoimmune thyroid disorders.
Ital. J. Gastroenterol. Hepatol.
31:283-287[Medline].
|
| 24.
|
deCarmo-Silva, R.,
C. E. Kater,
S. A. Dib,
S. Laureti,
F. Forini,
A. Cosentino, and A. Falomi.
2000.
Autoantibodies against recombinant human steroidogenic enzymes 21-hydroxylase, side-chain cleavage and 17alpha-hydroxylase in Addison's disease and autoimmune polyendocrine syndrome type III.
Eur. J. Endocrinol.
142:187-194[Abstract].
|
| 25.
|
Djilali-Saiah, I.,
S. Caillat-Zucman,
J. Schmitz,
M. L. Chavez-Vieira, and J. F. Back.
1994.
Polymorphism of antigen processing (TAP, LMP) and HLA class II genes in celiac disease.
Hum. Immunol.
40:8-16[Medline].
|
| 26.
|
Ehrlich, P., and J. Morgenroth.
1900.
Ueber haemolysine. Dritte mitteilung.
Berl. Klin. Wochnschr.
37:453.
|
| 27.
|
Ferguson, A., and K. Kingstone.
1996.
Coeliac disease and malignancies.
Acta Paediatrica
85:78-81[CrossRef].
|
| 28.
|
Freeman, H. J.
1995.
Celiac associated autoimmune thyroid disease a study of 16 patients with overt hypothyroidism.
Can. J. Gastroenterol.
9:242-246.
|
| 29.
|
Funda, D. P.,
A. Kaas,
T. Bock,
H. Tlaskalova-Hogenova, and K. Buschard.
1999.
Gluten-free diet prevents diabetes in NOD mice.
Diabetes Metab. Res. Rev.
15:323-327[CrossRef][Medline].
|
| 30.
|
Galli-Tsinopoulou, A.,
S. Nousia-Arvanitakis,
D. Dracoulacos,
M. Zefteri, and M. Karamouzis.
1999.
Autoantibodies predicting diabetes mellitus type I in celiac disease.
Horm. Res.
52:119-124[CrossRef][Medline].
|
| 31.
|
Gannage, M. H.,
G. Abikaram,
F. Nasr, and H. Awada.
1998.
Osteomalacia secondary to celiac disease, primary hyperparathyroidism and graves disease.
Am. J. Med. Sci.
315:136-139[CrossRef][Medline].
|
| 32.
|
Gannage, M. H.,
G. Abikaram,
F. Nasr, and H. Awada.
1998.
Osteomalacia secondary to celiac disease, primary hyperparathyroidism and Graves disease. 1998.
Am. J. Med. Sci.
315:136-139.
|
| 33.
|
Grabar, P.
1975.
Hypothesis. Auto-antibodies and immunological theories: an analytical review.
Clin. Immunol. Immunopathol.
4:453-466[CrossRef][Medline].
|
| 34.
|
Haralambous, S.,
C. Blackwell,
D. G. Mappouras,
D. M. Weir,
D. Kemmett, and P. Lymberi.
1995.
Increased natural autoantibody activity to cytoskeleton proteins in sera from patients with necrobiosis lipoidica, with or without insulin-dependent diabetes mellitus.
Autoimmunity
20:267-275[Medline].
|
| 35.
|
Heneghan, M. A.,
P. McHugh,
F. M. Stevens, and C. F. McCarthy.
1997.
Addison's disease and selective IgA deficiency in two coeliac patients.
Scand. J. Gastroenterol.
32:509-511[Medline].
|
| 36.
|
Houlston, R. S.,
I. P. M. Tomlinson,
D. Ford,
S. Seal,
A. M. Marossy,
A. Ferguson,
G. K. Holmes,
K. B. Hosie,
P. D. Howdle,
D. P. Jewell,
A. Godkin,
G. D. Kerr,
P. Kumar,
R. F. Logan,
A. H. Love,
S. Johnston,
M. N. Marsh,
S. Mitton,
D. O'Donoghue,
A. Roberts,
J. A. Walter-Smith, and M. F. Stratton.
1997.
Linkage analysis of candidate regions for coeliac disease genes.
Hum. Mol. Genet.
6:1335-1339[Abstract/Free Full Text].
|
| 37.
|
Howell, W. M.,
S. T. Leung,
D. B. Jones,
I. Nakshabendi,
M. A. Hall,
J. S. Lanchbury,
P. J. Ciclitira, and D. H. Wright.
1995.
HLA-DRB, -DQA, and -DQB polymorphism in celiac disease and enteropathy-associated T-cell lymphoma: common features and additional risk factors for malignancy.
Hum. Immunol.
43:29-37[CrossRef][Medline].
|
| 38.
|
Hummel, M.,
E. Bonifacio,
M. Stern,
J. Dittler,
A. Schimmel, and A. G. Ziegler.
2000.
Development of celiac disease-associated antibodies in offspring of parents with type I diabetes.
Diabetologia
43:1005-1011[CrossRef][Medline].
|
| 39.
|
Iafusco, D.,
F. Rea,
F. Chiarelli,
A. Mohn, and F. Prisco.
2000.
Effect of gluten-free diet on the metabolic control of type I diabetes in patients with diabetes and celiac disease.
Diabetes Care
23:712-713.
|
| 40.
|
Johansen, B. H.,
S. Buus,
F. Vartdal,
H. Viken,
J. A. Eriksen,
E. Thorsby, and L. M. Sollid.
1994.
Binding of peptides to HLA-DQ molecules: peptide binding properties of the disease-associated HLA-DQ(alpha-1-*-0501, beta-1-*-0201) molecule.
Int. Immunol.
6:453-461[Abstract/Free Full Text].
|
| 41.
|
Kaprio, J.,
J. Tuomilehto,
M. Koskenvuo,
K. Romanov,
A. Reunanen,
J. Eriksson,
J. Stengard, and Y. A. Kesaniemi.
1992.
Concordance for type 1 (insulin-dependent) and type 2 (non-insulin-dependent) diabetes mellitus in a population-based cohort of twins in Finland.
Diabetologia
35:1060-1067[CrossRef][Medline].
|
| 42.
|
Kapuscinska, A.,
T. Zalewski,
T. P. Chorzelski,
J. Sulej,
E. H. Beutner,
V. Kumar, and T. Rossi.
1987.
Disease specificity and dynamics of changes in IgA class anti-endomysial antibodies in celiac disease.
J. Pediatr. Gastroenterol. Nutr.
6:529-534[Medline].
|
| 43.
|
Kaukinen, K.,
P. Collin,
A. H. Mykkanen,
J. Partanen,
M. Maki, and J. Salmi.
1999.
Celiac disease and autoimmune endocrinologic disorders.
Dig. Dis. Sci.
44:1428-1433[CrossRef][Medline].
|
| 44.
|
Keaveny, A. P.,
R. Freaney,
M. J. McKenna,
J. Masterson, and D. P. O'Donoghue.
1996.
Bone remodeling indices and secondary hyperparathyroidism in celiac disease.
Am. J. Gastroenterol.
91:1226-1231[Medline].
|
| 45.
|
Kolho, K. L.,
A. Tiitinen,
M. Tulppala,
L. Unkila-Kallio, and E. Savilahti.
1999.
Screening for coeliac disease in women with a history of recurrent miscarriage or infertility.
Br. J. Obstet. Gynaecol.
106:171-173[Medline].
|
| 46.
|
Kordonouri, O.,
W. Dieterich,
D. Schuppan,
G. Webert,
C. Muller,
N. Sarioglu,
M. Becker, and T. Danne.
2000.
Autoantibodies to tissue transglutaminase are sensitive serological parameters for detecting silent coeliac disease in patients with type I diabetes mellitus.
Diabetes Med.
17:441-444[CrossRef][Medline].
|
| 47.
|
Kumar, V.,
A. Lerner,
J. E. Valeski,
E. H. Beutner,
T. P. Chorzelski, and T. Rossi.
1989.
Endomysial antibodies in the diagnosis of celiac disease and the effect of gluten on antibody titers.
Immunol. Investig.
18:533-544[Medline].
|
| 48.
|
Kumar, V.,
J. E. Valeski, and J. Wortsman.
1996.
Celiac disease and hypoparathyroidism cross-reaction of endomysial antibodies with parathyroid tissue.
Clin. Diagn. Lab. Immunol.
3:143-146[Abstract].
|
| 49.
|
Lampasona, V.,
E. Bazzigaluppi,
G. Barera, and E. Bonifacio.
1998.
Tissue transglutaminase and combined screening for coeliac disease and type I diabetes-associated autoantibodies.
Lancet
352:1192-1193[Medline].
|
| 50.
|
Lampasona, V.,
R. Bonfanti,
E. Bazzigaluppi,
A. Venerando,
G. Chiumello,
E. Bosi, and F. Bonifacio.
1999.
Antibodies to tissue transglutaminase C in type I diabetes.
Diabetologia
42:1195-1198[CrossRef][Medline].
|
| 51.
|
LaPorte, R. E.,
M. Matsushima, and Y. Chang.
1995.
Prevalence and incidence of insulin-dependent diabetes, p. 37-46.
In
M. L. Harris (ed.), Diabetes in America, 2nd ed. NIH publication no. 95-1468. National Institutes of Health, Bethesda, Md.
|
| 52.
|
Lewis, H. M.,
T. L. Renaula,
J. J. Garioch,
N. J. Leonard,
J. S. Fry,
P. Collin,
D. Evans, and L. Fry.
1996.
Protective effect of gluten-free diet against development of lymphoma in dermatitis herpetiformis.
Br. J. Dermatol.
135:363-367[CrossRef][Medline].
|
| 53.
|
Lie, B. A.,
L. M. Sollid,
H. Ascher,
J. Ek,
H. E. Akselsen,
K. S. Ronningen,
E. Thorsby, and D. E. Undlein.
1999.
A gene telomeric of the HLA class I region is involved in predisposition to both type I diabetes and coeliac disease.
Tissue Antigens
54:162-168[CrossRef][Medline].
|
| 54.
|
Lorini, R.,
M. A. Avanzini,
E. Lenta,
M. Cotellessa,
C. DeGiacomo, and G. d'Annunzio.
2000.
Antibodies to tissue transglutaminase C in newly diagnosed and long-standing type I diabetes mellitus.
Diabetologia
43:815-816[CrossRef][Medline].
|
| 55.
|
Lorini, R.,
A. Scaramuzza,
L. Vitali,
G. d'Annunzio,
M. A. Avanzini,
C. DeGiacomo, and F. Severi.
1996.
Clinical aspects of coeliac disease in children with insulin dependent diabetes mellitus.
J. Pediatr. Endocrinol. Metab.
9:101-111.
|
| 56.
|
Lorini, R.,
M. S. Scotta,
M. A. Avanzini, and L. Vitali.
1994.
IgA antibodies to gliadin, reticulin, and endomysium for celiac disease screening in children with insulin-dependent diabetes mellitus.
J. Pediatr.
124:994-996[CrossRef][Medline].
|
| 57.
|
Lorini, R.,
M. S. Scotta,
L. Cortona,
M. A. Avanzini,
L. Vitali,
C. DeGiacomo,
A. Scaramuzza, and F. Severi.
1996.
Celiac disease and type I (insulin-dependent) diabetes mellitus in childhood: follow-up study.
J. Diabetes Complications
10:154-159[CrossRef][Medline].
|
| 58.
|
Macgowan, D. J. L.,
D. O. Hourihane,
W. A. Tanner, and C. Omorain.
1996.
Duodeno-jejunal adenocarcinoma as a first presentation of coeliac disease.
J. Clin. Pathol.
49:602-604[Abstract/Free Full Text].
|
| 59.
|
Madacsy, L.,
A. Arato, and A. Korner.
1997.
Celiac disease as a frequent cause of abdominal symptoms in children with insulin-dependent diabetes mellitus.
Clin. Pediatr.
36:185-186[Free Full Text].
|
| 60.
|
Maki, M.,
T. Juupponen,
K. Holm, and O. Hallstrom.
1995.
Seroconversion of reticulin autoantibodies predicts coeliac disease in insulin-dependent diabetes mellitus.
Gut
36:239-242[Abstract/Free Full Text].
|
| 61.
|
Mathusvliegen, E. M. H.,
H. Vanhalteren, and G. N. J. Tytgat.
1994.
Malignant lymphoma in coeliac disease various manifestations with distinct symptomatology and prognosis.
J. Intern. Med.
236:43-49[Medline].
|
| 62.
|
Meddeb-Garnaoui, A.,
D. Zeliszewski,
J. F. Mougenot,
I. Djilali-Saiah,
S. Caillat-Zucman,
A. Dormoy,
C. Gaudebout,
M. M. Tongio,
J. J. Baudon, and G. Sterkers.
1995.
Reevaluation of the relative risk for susceptibility to celiac disease of HLA-DRB1, DQA1, DQB1, DPB1 and TAP2 alleles in a French population.
Hum. Immunol.
43:190-199[CrossRef][Medline].
|
| 63.
|
Meloni, G. F.,
S. Dessole,
N. Vargiu,
P. A. Tomasi, and S. Musumeci.
1999.
The prevalence of coeliac disease in infertility.
Hum. Reprod.
14:2759-2761[Abstract/Free Full Text].
|
| 64.
|
Merriman, T. R.,
I. A. Eaves,
R. C. Twells, and J. A. Todd.
1998.
Transmission of haplotypes of microsatellite markers rather than single marker alleles in the mapping of a putative type I diabetes susceptibility gene (IDDM6).
Hum. Mol. Genet.
7:517-524[Abstract/Free Full Text].
|
| 65.
|
Miller, A.,
W. Paspaliaris,
P. R. Elliott, and A. d'Apice.
1999.
Anti-transglutaminase antibodies and coeliac disease.
Aust. N. Z. J. Med.
29:239-242[Medline].
|
| 66.
|
Molberg, O.,
S. N. Mcadam,
R. Korner,
H. Quarsten,
C. Kristiansen,
L. Madsen,
L. Fugger,
H. Scott,
O. Noren,
P. Roepstorff,
K. E. Lundin,
H. Sjostrom, and L. M. Sollid.
1998.
Tissue transglutaminase selectively modifies gliadin peptides that are recognized by gut-derived T cells in celiac disease.
Nat. Med.
4:713-717[CrossRef][Medline].
|
| 67.
|
Moustakas, A. K.,
Y. van de Wal,
J. Routsias,
Y. M. Kooy,
P. van Veelen,
J. W. Drijfhout,
F. Koning, and G. K. Papadopoulos.
2000.
Structure of celiac disease-associated HLA-DQ8 and non-associated HLA-DQ9 alleles in complex with two disease-specific epitopes.
Int. Immunol.
12:1157-1166[Abstract/Free Full Text].
|
| 68.
|
Muir, A., and J. X. She.
1999.
Advances in the genetics and immunology of autoimmune polyglandular syndrome II/III and their clinical applications.
Ann. Med. Interne
150:301-312[Medline].
|
| 69.
|
Nafelski, E. A.,
K. T. Shaw, and A. Fao.
1995.
An ion pair in class II major histocompatibility complex heterodimers critical for surface expression and peptide presentation.
J. Biol. Chem.
270:22351-22360[Abstract/Free Full Text].
|
| 70.
|
Nepom, G. T., and W. W. Kwok.
1998.
Molecular basis for HLA-DQ associations with IDDM.
Diabetes
47:1177-1184[Abstract].
|
| 71.
|
Nikoshkov, A.,
A. Kalorni,
S. Lajic,
S. Laureti,
A. Wedell,
K. Lernmark, and H. A. Luthman.
1999.
A conformation-dependent epitope in Addison's disease and other endocrinological autoimmune diseases maps to a carboxyl-terminal functional domain of human steroid 21-hydroxylase.
J. Immunol.
162:2422-2426[Abstract/Free Full Text].
|
| 72.
|
Nilsen, E. M.,
K. E. Lundin,
P. Krajci,
H. Scott,
L. M. Sollid, and P. Brandtzaeg.
1995.
Gluten-specific HLA-DQ restricted T cells from coeliac mucosa produce cytokines with Th1 or Th0 profile dominated by interferon gamma.
Gut
37:766-776[Abstract/Free Full Text].
|
| 73.
|
Nosari, I.,
A. Casati,
C. Mora, et al.
1996.
The use of IgA anti-endomysial antibody test for screening coeliac disease in insulin-dependent diabetes mellitus.
Dia. Nutr. Meta. Clin. Exp.
9:267-272.
|
| 74.
|
Page, S. R.,
C. A. Lloyd,
P. G. Hill,
I. Peacock, and G. K. Holmes.
1994.
The prevalence of coeliac disease in adult diabetes mellitus.
QJM
87:631-637[Abstract/Free Full Text].
|
| 75.
|
Papadopoulos, K. I.,
Y. Hornblad, and B. Hallenngren.
1994.
The occurrence of polyglandular autoimmune syndrome type III associated with coeliac disease in patients with sarcoidosis.
J. Intern. Med.
236:661-663[Medline].
|
| 76.
|
Paulsen, G.,
K. E. Lundin,
H. A. Gjertsen,
T. Hansen,
L. M. Sollid, and E. Thorsby.
1995.
HLA-DQ2-restricted T-cell recognition of gluten-derived peptides in celiac disease. Influence of amino acid substitutions in the membrane distal domain of DQ beta 1*0201.
Hum. Immunol.
42:145-153[CrossRef][Medline].
|
| 77.
|
Perez-Brava, F.,
M. Araya,
A. M. Mondragon,
G. Rios,
T. Alarcon,
J. L. Roessler, and J. L. Santos.
1999.
Genetic differences in HLA-DQA1* and DQB1* allelic distributions between celiac and control children in Santiago, Chile.
Hum. Immunol.
60:262-267[CrossRef][Medline].
|
| 78.
|
Petronzelli, F.,
M. Bonamico,
P. Ferrante,
R. Grillo,
B. Mora,
P. Mariani,
I. Apollonio,
G. Gemme, and M. C. Mazzili.
1997.
Genetic contribution of the HLA region to the familial clustering of coeliac disease.
Ann. Hum. Genet.
61:307-317[CrossRef][Medline].
|
| 79.
|
Pocecco, M., and A. Ventura.
1995.
Coeliac disease and insulin-dependent diabetes mellitus a casual association.
Acta Paediatrica
84:1432-1433[Medline].
|
| 80.
|
Quarsten, H.,
G. Paulsen,
B. H. Hohansen,
C. J. Thorpe,
A. Holm,
S. Buus, and L. M. Sollid.
1998.
The P9 pocket of HLA-DQ2 (non-Aspbeta57) has no particular preference for negatively charged anchor residues found in other type I diabetes-predisposing non-Aspbeta57 MHC class II molecules.
Int. Immunol.
10:1229-1236[Abstract/Free Full Text].
|
| 81.
|
Rapoport, M. J.,
T. Bistritzer,
O. Vardi,
E. Broide,
A. Azizi, and P. Vardi.
1996.
Increased prevalence of diabetes-related autoantibodies in celiac disease.
J. Pediatr. Gastroenterol. Nutr.
23:524-527[CrossRef][Medline].
|
| 82.
|
Reijonen, H.,
S. Nejentsev,
J. Tuokko,
S. Koskinen,
E. Tuomilehto-Wolf,
H. K. Akerblom, and J. Ilonen.
1997.
HLA-DR4 subtype and alleles in DQ 1* 0302-positive haplotypes associated with IDDM. Childhood Diabetes in Finland Study Group.
Eur. J. Immunogenet.
24:357-363[CrossRef][Medline].
|
| 83.
|
Rensch, M. J.,
J. A. Merenich,
M. Lieberman,
B. D. Long,
D. R. David, and P. R. McNally.
1996.
Gluten-sensitive enteropathy in patients with insulin-dependent diabetes mellitus.
Ann. Intern. Med.
124:564-567[Abstract/Free Full Text].
|
| 84.
|
Reunala, T.,
J. Salmi, and J. Karvonen.
1987.
Dermatitis herpetiformis and celiac disease associated with Addison's disease.
Arch. Dermatol.
123:930-932[Abstract/Free Full Text].
|
| 85.
|
Ricci, M.,
O. Rossi,
S. Romagnani, and G. F. DelPrete.
1989.
Review: etiologic factors and pathogenic aspects of organ-specific autoimmune diseases. Essential role of autoreactive T cells and lymphokine network in the activation of effector systems responsible for tissue lesions.
Autoimmunity
2:331-344[Medline].
|
| 86.
|
Roivainen, M.,
M. Knip,
H. Hyoty,
P. Kulmala,
M. Hiltunen,
P. Vahasalo,
T. Hovi, and H. K. Akerblom.
1998.
Several different enterovirus serotypes can be associated with prediabetic autoimmune episodes and onset of overt IDDM. Childhood Diabetes in Finland Study Group.
J. Med. Virol.
56:74-78[CrossRef][Medline].
|
| 87.
|
Rossi, T. M.,
C. H. Albini, and V. Kumar.
1993.
Incidence of celiac disease identified by the presence of serum endomysial antibodies in children with chronic diarrhea, short stature, or insulin-dependent diabetes-mellitus.
J. Pediatr.
123:262-264[CrossRef][Medline].
|
| 88.
|
Sasazuki, T.,
F. C. Grumet, and H. O. McDevitt.
1977.
The association of genes in the major histocompatibility complex and disease susceptibility.
Annu. Rev. Med.
28:425-452[CrossRef][Medline].
|
| 89.
|
Sategna-Guidetti, C.,
M. Bruno,
E. Mazza,
A. Carlino,
S. Predebon,
M. Tagliabue, and C. Brossa.
1998.
Autoimmune thyroid diseases and coeliac disease.
Eur. J. Gastroenterol. Hepatol.
10:927-931[Medline].
|
| 90.
|
Sategna-Guidetti, C.,
S. Grosso,
R. Pulitano,
E. Benaduce,
F. Dani, and Q. Carta.
1994.
Celiac disease and insulin-dependent diabetes mellitus. Screening in an adult population.
Dig. Dis. Sci.
39:1633-1637[CrossRef][Medline].
|
| 91.
|
Saukkonen, T.,
E. Savilahti,
H. Reijonen,
J. Honen,
E. Tuomilehto-Wolf, and H. K. Akerblom.
1996.
Coeliac disease: frequent occurrence after clinical onset of insulin dependent diabetes mellitus. Childhood Diabetes in Finland Study Group.
Diabetes Med.
13:464-470[CrossRef][Medline].
|
| 92.
|
Schober, E.,
B. Bittmann,
G. Granditsch,
W. D. Huber,
A. Huppe,
A. Jager,
G. Oberhuber,
B. Rami, and G. Reihcel.
2000.
Screening by anti-endomysium antibody for celiac disease in diabetic children and adolescents in Austria.
J. Pediatr. Gastroenterol. Nutr.
30:391-396[CrossRef][Medline].
|
| 93.
|
Seissler, J.,
M. Schott,
H. Steinbrenner,
P. Peterson, and W. A. Scherbaum.
1999.
Autoantibodies to adrenal cytochrome P450 antigens in isolated Addison's disease and autoimmune polyendocrine syndrome type II.
Exp. Clin. Endocrinol. Diabetes
107:208-213[Medline].
|
| 94.
|
Selby, P. L.,
M. Davies,
J. E. Adams, and E. B. Mawer.
1999.
Bone loss in celiac disease is related to secondary hyperparathyroidism.
J. Bone Mineral. Res.
14:652-657[CrossRef][Medline].
|
| 95.
|
Shaker, J. L.,
R. C. Brickner,
J. W. Findling,
T. M. Kelly,
R. Rapp,
G. Rizk,
J. G. Haddad,
D. S. Schalch, and Y. Shenker.
1997.
Hypocalcemia and skeletal disease as presenting features of celiac disease.
Arch Intern. Med.
157:1013-1016[Abstract/Free Full Text].
|
| 96.
|
She, J. X., and M. P. Marron.
1998.
Genetic susceptibility factors in type I diabetes: linkage, disequilibrium and functional analyses.
Curr. Opin. Immunol.
10:682-689[CrossRef][Medline].
|
| 97.
|
Sigurs, N.,
C. Johansson,
P. O. Elfstrand,
M. Viander, and A. Lanner.
1993.
Prevalence of coeliac disease in diabetic children and adolescents in Sweden.
Acta Paediatr.
82:748-751[Medline].
|
| 98.
|
Silman, A. J.,
A. J. MacGregor,
W. Thomson,
S. Holligan,
D. Carthy,
A. Farhan, and W. E. Ollier.
1993.
Twin concordance rates for rheumatoid arthritis: results from a nationwide study.
Br. J. Rheumatol.
32:903-907[Abstract/Free Full Text].
|
| 99.
|
Sinha, A.,
M. T. Lopez, and H. O. McDevitt.
1990.
Autoimmune diseases: the failure of self tolerance.
Science
248:1380-1388[Abstract/Free Full Text].
|
| 100.
|
Sinclair, N. R., and A. Panoskaltsis.
1988.
The immmunoregulatory apparatus and autoimmunity.
Immunol. Today
9:260-265[CrossRef][Medline].
|
| 101.
|
Soderbergh, A.,
F. Rorsman,
M. Halonen,
O. Ekwall,
P. Bjorses,
O. Kampe, and E. S. Husebye.
2000.
Autoantibodies against aromatic L-amino acid decarboxylase identifies a subgroup of patients with Addison's disease.
J. Clin. Endocrinol. Metab.
85:460-463[Abstract/Free Full Text].
|
| 102.
|
Takeda, R.,
Y. Takayama,
S. Tagawa, and L. Kornel.
1999.
Schmidt's syndrome: autoimmune polyglandular disease of the adrenal and thyroid glands.
Isr. Med. Assoc. J.
1:285-286[Medline].
|
| 103.
|
Talal, A. H.,
J. A. Murray,
J. A. Goeken, and W. I. Sivitz.
1997.
Celiac disease in an adult population with insulin-dependent diabetes mellitus use of endomysial antibody testing.
Am. J. Gastroenterol.
92:1280-1284[Medline].
|
| 104.
|
Toscano, V.,
F. G. Conti,
E. Anastasi,
P. Mariani,
C. Tiberti,
M. Poggi,
M. Montuori,
S. Monti,
S. Laureti,
E. Cipolletta,
G. Gemme,
S. Caiola,
U. DiMario, and M. Bonamico.
2000.
Importance of gluten in the induction of endocrine autoantibodies and organ dysfunction in adolescent celiac patients.
Am. J. Gastroenterol.
95:1742-1748[CrossRef][Medline].
|
| 105.
|
Valdes, A. M.,
S. McWeeney, and G. Thomson.
1997.
HLA class II DR-DQ amino acids and insulin-dependent diabetes mellitus: application of the haplotype method.
Am. J. Hum. Genet.
60:717-728[Medline].
|
| 106.
|
Valdimarsson, T.,
G. Toss,
O. Lofman, and M. Strom.
2000.
Three years' follow-up of bone density in adult coeliac disease: significance of secondary hyperparathyroidism.
Scand. J. Gastroenterol.
35:274-280[CrossRef][Medline].
|
| 107.
|
Valentino, R.,
S. Savastano,
A. P. Tommaselli,
M. Dorato,
M. T. Scarpitta,
M. Gigante,
G. Lombardi, and R. Troncone.
1999.
Unusual association of thyroiditis, Addison's disease, ovarian failure and celiac disease in a young women.
J. Endocrinol. Investig.
22:390-394[Medline].
|
| 108.
|
Valentino, R.,
S. Savastano,
A. P. Tommaselli,
M. Dorato,
M. T. Scarpitta,
M. Gigante,
M. Micillo,
F. Paparo,
E. Petrone,
G. Lombardi, and R. Troncone.
1999.
Prevalence of coeliac disease in patients with thyroid autoimmunity.
Horm. Res.
51:124-127[CrossRef][Medline].
|
| 109.
|
van de Wal, Y.,
Y. M. Kooy,
J. W. Drijfhout,
R. Amons, and F. Koning.
1996.
Peptide binding characteristics of the coeliac disease-associated DQ (alpha-1-*-0501, beta-1-*-0201) molecule.
Immunogenetics
44:246-253[CrossRef][Medline].
|
| 110.
|
Vartdal, F.,
B. H. Johansen,
H. G. Rammensee, and L. M. Sollid.
1996.
The peptide binding motif of the disease-associated HLA-DQ ( 1*0501, 1*0201) molecule.
Eur. J. Immunol.
26:2764-2772[Medline].
|
| 111.
|
Velluzzi, F.,
A. Caradonna,
M. F. Boy,
M. A. Pinna,
R. Cabula,
M. A. Lai,
E. Piras,
G. Corda,
P. Mossa,
F. Atzeni,
A. Loviselli,
P. Usai, and S. Mariotti.
1998.
Thyroid and celiac disease: clinical, serologic and echographic study.
Am. J. Gastroenterol.
93:976-979[CrossRef][Medline].
|
| 112.
|
Ventura, A.,
G. Magazzu, and L. Greco.
1999.
Duration of exposure to gluten and risk for autoimmune disorders in patients with celiac disease.
Gastroenterology
117:297-303[CrossRef][Medline].
|
| 113.
|
Ventura, A.,
E. Neri,
C. Ughi,
A. Leopaldi,
A. Citta, and T. Not.
2000.
Gluten-dependent diabetes-related and thyroid-related autoantibodies in patients with celiac disease.
J. Pediatr.
137:263-265[CrossRef][Medline].
|
| 114.
|
Vitoria, J. C.,
L. Castano,
I. Rica,
J. R. Bilbao,
A. Arrieta, and M. D. Garcia-Masdevall.
1998.
Association of insulin-dependent diabetes mellitus and celiac disease: a study based on serologic markers.
J. Pediatr. Gastroenterol. Nutr.
27:47-52[CrossRef][Medline].
|
| 115.
|
Westman, E.,
G. R. Ambler,
M. Royle,
J. Peat, and A. Chan.
1999.
Children with coeliac disease and insulin dependent diabetes mellitus-growth, diabetes control dietary intake.
J. Pediatr. Endocrinol. Metab.
12:433-442[Medline].
|
| 116.
|
Wilkin, T. J.
1990.
The primary lesion theory of autoimmunity: a speculative hypothesis.
Autoimmunity
7:225-235[Medline].
|
| 117.
|
Wortsman, J., and V. Kumar.
1994.
Case report: idiopathic hypoparathyroidism co-existing with celiac disease immunologic studies.
Am. J. Med. Sci.
307:420-427[Medline].
|
| 118.
|
Yu, L.,
K. W. Brewer,
S. Gates,
A. Wu,
T. Wang,
S. R. Babu,
P. A. Gottlieb,
B. M. Freed,
J. Noble,
H. A. Erlich,
M. J. Rewers, and G. S. Eisenbarth.
1999.
DRB1*04 and DQ alleles: expression of 21-hydroxylase autoantibodies and risk of progression to Addison's disease.
J. Clin. Endocrinol. Metab.
84:328-335[Abstract/Free Full Text].
|
Clinical and Diagnostic Laboratory Immunology, July 2001, p. 678-685, Vol. 8, No. 4
1071-412X/01/$04.00+0 DOI: 10.1128/CDLI.8.4.678-685.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
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