PubMed Health⌕ Search

Biomedical subjects

M C Vaidya

Publications and source records attributed to M C Vaidya.

52 records · Page 3Linked to original sources
PubMed1978

Immunological methods employed in an attempt to induce erythema nodosum leprosum (ENL) in mice.

In the mouse foot pad model five different parameters were employed to simulate the condition of ENL as observed in the human. The experimental groups with five to six months leprosy infection were injected intravenously with various anti-mycobacterial antibodies, M. leprae sonicate and 'B' cells obtained from syngenic donors. The control group of animals, infected similarly, were treated either with M. leprae sonicate or gamma globulins precipitated from normal human serum. All recipients were killed at one day interval excepting those with 'B' cell transfer, which were sacrificed at seven days. The sites of predilection for immune complex deposition viz. foot pad and kidney as well as the spleen were examined by light and fluorescence microscopy. These findings are described and discussed.

Animals↗
PubMed1976

An evaluation of the immune state in leprosy.

An evaluation of the immune state in leprosy was done by the application of a system of graft-versus-host reaction. Peripheral blood lymphocytes obtained from patients with different forms of leprosy and from normal healthy individuals were injected intravenously into the irradiated mice. The rate of blast transformation of the donor cells was measured by the radio-active thymidine uptake. The number of cells labelled with tritiated-thymidine was much higher in the normal individuals and patients with tuberculoid leprosy than in the patients with lepromatous leprosy with the borderline group placed in between the two. However, following successful treatment with DDS, an increased responsiveness and active DNA synthesis could be observed in the previously less responsive lepromatous lymphocytes.

Adult↗
PubMed1975

Histocompatibility antigens (HL-A) in leprosy.

HL-A antigens of 70 leprosy patients and 40 normal healthy individuals were determined by the standard microlymphocytotoxicity test. Both lepromatous and non-lepromatous leprosy patients were tested for the presence of 11 HL-A antigens, and the frequency of each specificity was compared with that in a normal population of the same ethnic group. Although the statistical significance of HL-A8 specificity was found to be marginal in lepromatous leprosy patients, when using ordinary 2 times 2 statistics, there did seem to be a decreased frequency of HL-A9 among the non-lepromatous type. Other antigens tested did not reveal any significant differences between the two groups of subjects.

Adult↗
PubMedDate not supplied

HLA-B5 and B21 antigens in aortoarteritis.

The distribution of class I HLA antigens (HLA-A, B) were determined in 50 patients of Aortoarteritis in an Indian population. This included 29 females and 21 males. The difference in antigen frequency was observed between patients and controls with reference to HLA-A19, B5 and B21 antigens. A decreased frequency of HLA-A19 was observed in the patients as compared to controls (14% vs 33.25%, X2 = 6.81, P less than 0.025). Of the B locus antigens, an increased frequency of HLA B5 was observed in the patients as compared to controls (48% vs 29.5%, X2 = 6.2, P less than 0.025). HLA-B21 was also increased in the patients as compared to the controls (18% vs 6.5%, X2 = 6.67, P less than 0.025). These data suggest the involvement of genetic factor (s) in the aetiopathogenesis of this disease. Further, the observations indicate that HLA-B5 and B21 may be associated with Aortoarteritis.

Adolescent↗
PubMedDate not supplied

HLA B27 in patients with seronegative spondarthritides.

We investigated the pattern of genetic susceptibility to rheumatic diseases in Indians by means of HLA analysis. HLA B27 was present in more than 90% of cases included under the broad category or seronegative spondarthritides. In this respect our data resembled results reported for Caucasian populations. In our population, however, the phenotypic frequency of HLA B27 was low as reported from Japan.

Adult↗
PubMedDate not supplied

HLA antigens in Indian population with non-specific aortoarteritis.

HLA typing of Class I antigens (HLA - A & -B loci) was done for 65 patients suffering from nonspecific aortoarteritis, in Indian population. The diagnosis of these patients was based on clinical findings and confirmed by angiographic studies. Decreased phenotype frequency of HLA-A19 (p less than 0.005, relative risk 0.28), increased frequency of HLA-B5 (p less than 0.005, relative risk 2.46) and B21 (p less than 0.005, relative risk 3.25) was observed when compared with the control group. A decreased frequency of two other alleles of B locus i.e. B35 (p less than 0.005, relative risk 0.27) and B40 (p less than 0.05, relative risk 0.04) was seen in patient group as compared to control. The data indicate the possible association of HLA-B5 and B21 antigens with the nonspecific aortoarteritis.

Adolescent↗
PubMedDate not supplied

Genetic marker in juvenile diabetic retinopathy.

Thirty five patients with insulin dependent diabetes mellitus (IDDM) were investigated for development of retinal microangiopathy by fluorescein angiography. HLA typing (A,B.C antigens) was done as a genetic marker. There was no statistically significant difference in the frequency of HLA antigens between patients without retinopathy (Gr.I) and with retinopathy (Gr.II) Frequency of various HLA antigens did not differ significantly in the mild and severe retinopathy groups or in comparison with controls. HLA B8 was significantly over represented in the patients of IDDM as a single group (GrI + II) when compared with controls (26% vs 8%). HLA profile was not a predictor of either the development or the severity of retinopathy in IDDM.

Adolescent↗