Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0220723 (PCA)
 4,687 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

1. Forty-one simplex and 6 multiplex families of Brazilian IDDM patients were studied by the indirect immunofluorescence technique to determine the prevalence of the following autoantibodies: islet cells (ICA), islet cells which fix complement (ICA-CF), thyroid microsomes (TMA), thyroglobulin (TGA), and gastric-parietal cells (PCA). A total of 54 IDDM patients belonging to two family groups were analyzed. 2. A significantly higher frequency of ICA-CF and TMA was detected among the siblings from multiplex families than among those from simplex families (18.7% vs 1.7%). 3. A prospective study of 5 ICA-positive siblings was undertaken, and 2 who later became diabetic were found to be positive to both ICA and ICA-CF. 4. The prevalence of islet-cell antibodies in these 54 Brazilian IDDM patients and their unaffected first-degree relatives from genetically mixed groups suggests that the humoral autoimmune mechanisms of the disease are probably identical to those observed in other populations of different ethnic backgrounds.
 ...
PMID:Prevalence of autoantibodies in simplex and multiplex families of Brazilian insulin-dependent diabetic patients. 182 50

Multiple sclerosis (MS) is associated with complex abnormalities of immunoregulation and a role of autoimmunity in its pathogenesis has been accepted. MS is reportedly associated with several autoimmune diseases, but few studies are available on the prevalence of organ-specific autoantibodies in this condition. The aim of this study was to assess the frequency of anti-thyroglobulin (TgAb), anti-thyroid microsomal (MAb) and gastric parietal cell (PCA) antibodies in 113 patients (63 females, 50 males, age ranging 15-62 years) with MS and in 51 neurological controls. The diagnosis of MS was made according to McDonald and Halliday criteria. TgAb and/or MAb were detected by passive hemagglutination in 19 (16.8%) patients with MS and in 3 (5.9%) of the controls. All positive TgAb and/or MAb were observed in MS females (19/63 = 30.1%), with significantly higher frequency than in female controls (X2 = 5.15, p less than 0.025). The presence of circulating thyroid antibodies was higher in patients with clinically definite or progressive probable MS and in those with long standing disease. In contrast with thyroid antibodies, no difference in the frequency of PCA, as assessed by radioimmunoassay, was observed between MS and controls. These data support a specific association between thyroid autoimmunity and MS. The appearance of thyroid autoimmune phenomena seems to be related to the reliability of the diagnosis of MS and the duration of the disease.
 ...
PMID:Circulating thyroid and gastric parietal cell autoantibodies in patients with multiple sclerosis. 233 23

160 children and young adults (aged 7-21 years) and 84 diabetics (aged 2-19 years) were screened for thyroglobulin (TgA), thyroid microsomal (MsA), smooth muscle (SMA), parietal cell (PCA), reticulin (RA), glomerular (GIA) and mitochondrial (MA) antibodies. The diabetics were also screened for islet cell antibodies (ICA). The overall incidence of other antibodies than ICA at the lowest serum titre studied was 18.1 percent for healthy children and 30.9% for diabetic children. The elevation in diabetics is significant (p less than 0.01). Females were overrepresented in both groups and had the highest titres of antibodies. The age group 10-14 years was observed to be a special time at which antibody titres became positive. As compared with the controls, diabetics exhibited an increased incidence of MsA (4.4 and 11.9% respectively, p less than 0.001), PCA (5.0 and 10.7% respectively, p less than 0.05) and RA (3.8 and 9.5% respectively, p less than 0.05). The presence of ICA or the duration of diabetes showed no correlation with other autoantibodies. The results indicate that autoantibodies at a low titre are a common phenomenon. Diabetics seem to be susceptible to react against their own tissue, which is probably associated with their increased frequency of autoimmune diseases.
 ...
PMID:Organ-specific antibodies in healthy and diabetic children and young adults. 675 72

In the present study we have investigated the prevalence of organ-specific and non organ-specific autoantibodies in 26 healthy centenarians (6 men, 20 women; age range 101-106 years), using as controls 54 healthy old (33 men and 21 women, age range 71-93) and 56 young subjects (29 men and 27 women, age range 26-60). We assayed sera of each group for the following organ-specific autoantibodies, anti-gastric mucosa (anti-PCA), anti-thyroglobulin (anti-Tg) and non organ-specific autoantibodies, anti-cardiolipin (anti-APA IgG and IgM), anti-nuclear antigens (anti-ANA), anti-double strand DNA (anti-ds-DNA), anti-extractable nuclear antigens (anti-ENA). Finally, natural anti-alpha-galactosyl (anti-alpha-GAL) antibodies were also analyzed. As expected, in the old subjects there was a significant increase of prevalence of anti-Tg and anti-PCA autoantibodies. By contrast, in centenarians the prevalence of organ specific anti-Tg and anti-PCA antibodies was not significantly different from that observed in controls aged less than 60 years. The prevalence of non organ-specific autoantibodies anti-APA (IgG), anti-APA (IgM), anti-ANA, was significantly increased both in the elderly and centenarians when compared with the prevalence observed in sera from the young. Anti-ENA and anti-dsDNA antibodies were not detected in all groups studied. Finally, the prevalence of natural anti-alpha-GAL antibodies significantly increases with age, including centenarians. In conclusion, we confirm and extend the results previously obtained by other authors. In fact, as already described, the prevalence of organ-specific autoantibodies in the elderly is not seen after the tenth decade of life. Interestingly, the prevalence of non organ-specific autoantibodies is instead increased in these subjects, suggesting that different mechanisms are involved in the pathogenesis of these autoantibodies. Particularly, these autoantibodies could be the expression of a damaged tissue process rather than of an autoimmune one, as suggested by data concerning natural antibodies.
 ...
PMID:Prevalence of organ-specific and non organ-specific autoantibodies in healthy centenarians. 914 70