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Query: UMLS:C0011854 (type 1 diabetes)
 20,749 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Serum concentrations of immunoglobulin (Ig) A, M, G and complement components C3, C4, Bf were investigated in 50 patients with insulin--dependent, non--insulin dependent diabetes of 60 patient and control healthy subjects. The mean level of IgA was lower and IgM and IgG higher in both types of diabetic patients. But the low level of IgG was observed in 11% patients with insulin dependent diabetes. It was not significant difference in concentrations of complement components proteins in both diabetic groups and control subjects. Insulin dependent diabetic patients with microangiopathic complications had lower level of serum C4, but this difference was not statistically significant.
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PMID:[Serum immunoglobulins and various components of complement in patients with insulin-dependent diabetes mellitus]. 277 39

We have found elevated IgA class mumps and Coxsackie B4 virus antibodies and IgA/IgG antibody ratios in type 1 diabetic patients. However, IgA class herpes simplex (HSV1) virus antibodies showed no difference between patients and controls. To study the possible contribution of genetically polymorphic immunoglobulin markers to the pronounced IgA class reactivity Ig allotypes (Gm, A2m and Km determinants) were compared to virus antibodies in diabetic patients and healthy controls. Ig allotypes were equally distributed in both groups suggesting that the genes coding for these structures are not in close linkage disequilibrium with susceptibility gene(s) for type 1 diabetes. Accordingly, pronounced IgA class immune response in diabetic patients is hardly due to Ig allotype related factors. Patients had elevated IgA class mumps and Coxsackie B4 antibodies and IgA/IgG antibody ratios independently of the Gm phenotype group. In healthy subjects but not in diabetic patients IgA class mumps antibody levels and IgA/IgG mumps antibody ratios significantly correlated with the Gm phenotypes. Such Gm association was not observed in Coxsackie B4 or HSV1 antibodies. These results suggest that though Gm phenotypes have a general effect on mumps specific antibody response, some other factors than Ig allotypes are responsible for the elevated IgA class mumps and Coxsackie B antibody levels and IgA/IgG antibody ratios in type 1 diabetes.
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PMID:Immunoglobulin allotypes and virus antibodies in Finnish type 1 diabetic patients. 285 69

We studied antibodies to cow's milk, beta-lactoglobulin and gliadin with enzyme-linked immunosorbent assay in the sera of 91 children with insulin dependent diabetes mellitus (IDDM); 36 of them were newly diagnosed. The children with newly diagnosed IDDM had significantly higher levels of IgA antibodies to cow's milk and to beta-lactoglobulin, and IgG antibodies to beta-lactoglobulin than 100 age-matched controls. We infer that either the pattern of cow's milk consumption is altered in children who will have IDDM, or their immunological reactivity to proteins in cow's milk is enhanced, or the permeability of their intestines to cow's milk protein is higher than normal.
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PMID:Children with newly diagnosed insulin dependent diabetes mellitus have increased levels of cow's milk antibodies. 341 56

We analyzed the flow rate and composition of paraffin-stimulated whole saliva samples from 35 adult diabetic patients and their age- and sex-matched, non-diabetic, clinically healthy controls. All patients had insulin-dependent diabetes (IDDM) with a mean (+/- S.D.) duration of 14.0 +/- 9.1 years. The saliva analysis included the quantitation of total protein, amylase, immunoglobulins (isotypes A, G, and M), and the non-antibody, innate antimicrobial factors (lysozyme, lactoferrin, salivary peroxidase, myeloperoxidase, thiocyanate, and hypothiocyanite). The whole saliva samples from diabetic patients had significantly higher amounts of IgA (p less than 0.001) and IgG (p less than 0.05) than did the controls. No differences between the study groups were observed in flow rate, protein content, amylase activity, or IgM. The levels of innate defense factors were similar in both study groups except for salivary peroxidase, which was higher (p less than 0.02) among diabetics than among controls. Our results indicate that the antimicrobial defense capacity of whole saliva is not impaired in diabetic patients.
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PMID:Immunoglobulins and innate antimicrobial factors in whole saliva of patients with insulin-dependent diabetes mellitus. 345

The possible relationship between Lewis red cell groups and secretor status and diabetes mellitus has been investigated in diabetic patients from Northwestern Ethiopia. The Lewis negative phenotype [Le(a-b-)] showed similar frequencies in diabetics and a control sample. Determination of the secretor status revealed a tendency to higher non-secretor rates in diabetics, particularly of the insulin-dependent type, in comparison with non-diabetic Ethiopians. A lack of effective immune protection from secretory IgA antibodies as a plausible explanation for the relationship between non-secretor status and IDDM is discussed. However, the available data from our study showed no statistically significant association between secretor state and IDDM. Without a detailed genetic characterization of our diabetic patients (HLA association data) it will be difficult to define precisely the postulated contribution of the Se gene to the aetiopathogenesis of IDDM.
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PMID:ABH-secretion and Lewis red cell groups in diabetic and normal subjects from Ethiopia. 381 5

Two hundred and ten pediatric IDDM patients with long duration of illness and their matched controls (age range 2-19 years) were analysed for mumps antibodies in IgG, IgM and IgA antibody classes by enzyme linked immunosorbent assay (ELISA). About 70% of both patients and controls had antibodies against mumps virus. However, IDDM patients had higher mean levels of IgA class antibodies than the controls, while no difference was found in IgG or IgM class antibodies. The elevated IgA class mumps antibodies did not correlate with elevated levels of IgA class Coxsackie B4 or cytomegalovirus antibodies. This elevation of IgA antibody levels was evident already early after mumps infection and seemed to persist several years, since the difference was most pronounced in the oldest age group. Female patients as well as female controls had significantly higher IgG and IgM antibody levels compared to males. This may at least in part be explained by a difference in the age distribution in females compared to males and may suggest different age-dependent epidemiology of mumps between boys and girls in this material. No such difference was found in IgA levels between the sexes.
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PMID:Humoral immunity against viral antigens in insulin-dependent diabetes mellitus (IDDM): altered IgA class immune response against mumps virus. 400 99

Blood mononuclear cells obtained from 17 newly diagnosed insulin-dependent diabetic (IDDM) patients treated with insulin for 5-7 days were assessed for the number of spontaneous and pokeweed mitogen (PWM)-stimulated immunoglobulin-secreting cells in a reverse haemolytic plaque assay. The spontaneous in vitro immunoglobulin secretion was evanescent and decreased in individual patients within 1-4 months of insulin treatment. Compared to matched controls, 53% (9/17) of the IDDM patients had an elevated spontaneous secretion of immunoglobulin, 41% (7/17) for IgG, 35% (6/17) for IgM, and 35% (6/17) for IgA. The quantities of PWM-stimulated IgG, IgM, or IgA secreting cells in IDDM were comparable to the controls. The IDDM patients with spontaneous immunoglobulin secreting cells had higher fasting C-peptide levels compared to the patients with immunoglobulin-producing cells within the normal range (P less than 0.05). The average titre of islet cell cytoplasmic antibodies was 1:26 in (9 out of 9 were positive) patients with, compared to 1:1 in patients (4 out of 8 were positive) without spontaneous secretion (P = 0.025). These results suggest that the clinical onset of IDDM is associated with a polyclonal B lymphocyte activation and that higher levels of fasting C-peptide islet cell antibodies are associated with this immunoregulatory abnormality.
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PMID:Spontaneous in vitro immunoglobulin secretion at the diagnosis of insulin-dependent diabetes. 637 49

It has been recently reported that in type 1 diabetes the insertion/deletion (I/D) polymorphism of the angiotensin I-converting enzyme gene is associated with the presence of diabetic nephropathy. Tissue angiotensin I-converting enzyme is determined by I/D polymorphism, and it has been speculated that in diabetes differences of local angiotensin II availability determine the risk of renal disease. Since angiotensin II is thought to play an important role in the evolution of renal disease in general, we tested whether genotype distribution of the I/D polymorphism is also different in patients with immunoglobulin A-glomerulonephritis (IgA-GN). Furthermore we compared IgA-GN patients with (1) stable renal function or (2) terminal renal failure to investigate a potential role of the I/D polymorphism in the renal prognosis. We examined 122 patients with biopsy-confirmed IgA-GN who had stable renal function and 82 dialysis-dependent or transplanted patients with biopsy-confirmed IgA-GN. Furthermore, in 134 healthy individuals used as controls we analyzed the DNA for normal distribution of genotypes and allele frequencies. The polymorphic region was amplified using polymerase chain reaction with specific primers. Alleles were detected on 2% agarose gels. Genotype distributions and allele frequencies were not significantly different between controls and patients with IgA-GN and stable renal function. Furthermore, no significant difference in genotype distribution was detected between patients with IgA-GN and stable renal function compared with patients with IgA-GN and end-stage renal failure, although a trend for a higher frequency of DD-homozygotes was noted in the latter group (P = 0.07).(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:No association of converting enzyme insertion/deletion polymorphism with immunoglobulin A glomerulonephritis. 748 24

Sera obtained at diagnosis from 273 children (0-14 years) with insulin-dependent diabetes mellitus (IDDM) were studied to compare different autoantibody levels. The subjects comprise 75% of all incident cases in New South Wales, Australia, for a 2-year period (ascertainment > 99% complete). Antibodies against glutamate decarboxylase were measured by radioimmunoprecipitation, insulin autoantibodies (on 176 sera collected within 4 days of initiation of insulin therapy) by radioimmunoassay, thyroid peroxidase and antigliadin IgA antibodies by enzyme-linked immunoassay, and anti-endomysial IgA and islet cell antibodies by indirect immunofluorescence. Reference ranges for anti-glutamate decarboxylase and insulin autoantibodies were determined in a group of non-diabetic children. Of the sera 69% were positive for anti-glutamate decarboxylase, 65% for insulin autoantibodies, 71% for islet cell antibodies (> or = 20 Juvenile Diabetes Foundation units), 10% for anti-thyroid peroxidase, 2.6% for antigliadin and 3.0% for anti-endomysial antibodies. Islet cell antibodies and insulin autoantibodies were both negative in 13.7% of the sera, while only 5.8% were negative for all three of islet cell antibodies, insulin autoantibodies and anti-glutamate decarboxylase. There was a higher frequency of anti-glutamate decarboxylase among girls than boys (75% vs 63%, p = 0.03) and a negative correlation between the level of insulin autoantibodies and age at diagnosis (r = -0.41, p < 0.0001). A higher frequency of antithyroid peroxidase was found with increasing age (p = 0.05). Higher titres of islet cell antibodies were associated with a higher frequency of both anti-glutamate decarboxylase (p < 0.0001) and insulin autoantibodies (p = 0.003).(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Anti-glutamate decarboxylase and other antibodies at the onset of childhood IDDM: a population-based study. 786 83

Serum IgA class reticulin autoantibody test was performed prospectively once a year on 238 children and adolescents with insulin dependent diabetes mellitus (IDDM). At the initial testing, within one year after onset of IDDM, five were positive and 233 were negative. During follow up a further 11 of the initially antibody negative children became positive (6.7%). Jejunal biopsy was performed at the appearance of the autoantibodies and silent coeliac disease was shown in nine (3.8%). One of these children showed on initial biopsy after the onset of IDDM to have normal jejunal mucosal architecture deteriorating later to a flat lesion. Jejunal immunohistochemical studies of another of the patients positive for reticulin autoantibodies but normal on routine biopsy showed an increased density of intraepithelially located gamma/delta T cells and aberrant HLA-DR expression in the crypts pointing to ongoing mucosal inflammation and potential coeliac disease. This study shows that in IDDM patients, reticulin autoantibody negative subjects become antibody positive, which may be followed by coeliac disease. Repeated serological screening and rebiopsy should be considered to detect late developing clinically silent coeliac disease among patients with IDDM.
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PMID:Seroconversion of reticulin autoantibodies predicts coeliac disease in insulin dependent diabetes mellitus. 788 23


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