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PubMedDate not supplied

Clinical and immunogenetic subsets of psoriatic arthritis.

Relationships between clinical features of psoriatic arthritis and HLA antigens were examined in 60 patients. HLA-B locus antigens, Bw38, B17, B27 and possibly Bw39 were significantly increased, while HLA-D and DR specificities were not. Cw6 was not studied. The relative risk for disease was doubled in patients having B27 plus a psoriatic HLA antigen. HLA-Bw38 correlated with young age of onset for psoriasis and arthritis, asymmetrical peripheral involvement, and, along with B27, combined peripheral/axial disease. While B17 was also associated with young onset psoriasis, arthritis onset was later and symmetrical in pattern. Certain clinical subsets of psoriatic arthritis may relate to HLA status, and disease susceptibility appears to lie closer to HLA-B than to HLA-D.

Adult↗
PubMed1981

Immunogenetics of susceptibility to leprosy, tuberculosis, and leishmaniasis. An epidemiological perspective.

The literature on the genetic regulation of susceptibility in leprosy, tuberculosis, amd leishmaniasis is critically reviewed. Of the three groups of diseases, leprosy has received the most attention from the standpoint of human genetics. There is now evidence that genetic factors, some of them HLA-linked, play a role in tuberculoid leprosy. However, the evidence leaves considerable room for environmental determinants in addition to genetic background. Several twin studies of tuberculosis have favored some genetic factors in clinical tuberculosis, but their evidence is mitigated by the many biases underlying such studies. Though very little work has been done on the genetics of leishmaniasis in man, experimental studies in mice have begun to unravel mechanisms controlling successive steps in the course of both L. donovani and L. torpica infections. It is suggested that future work should concentrate on moving from genetics to biochemical genetics in the mouse, should extend family studies in conjunction with markers in man, and should place high priority on confirmation of reported leprosy type discordance among monozygous twins.

Animals↗
PubMed1981

Immunogenetic studies in semi-inbred pigs.

Seventy-six siblings from 11 semi-inbred families of Landrace pigs (inbreeding coefficient 0.70-0.82) were used for transplantation of skin and renal allografts. The animals were selected with regard to the major histocompatibility complex SLA, alloantigenic systems SLB, SLC and blood groups. Using the test of the difference in mean level between two groups of observations, the influence of compatibility in the E blood group system on the survival of transplants was proved. The observed difference suggests that the E blood group complex or a linked locus behaves as a minor histocompatibility system. The induction of tolerance in piglets treated and non-treated with allogeneic sera from long-term liver recipients was also investigated. Large doses of sera did not exert any effect on skin graft survival.

Alleles↗
PubMed1980

Are results of immunosuppressive therapy influenced by immunogenetic markers?

A group of 157 children, 4-15 years old, suffering from various forms of glomerulonephritis were investigated. Associations between the HLA system and the clinical, morphological and therapeutic responses were looked for. The study revealed the following associations: chronic GN to B15 and B18; Schönlein-Henoch GN to B27, Bw35 and Bw40; focal GN to B18; mesangioproliferative GN to B27; susceptibility to corticosteroids to B18; resistance to corticosteroids to B15.

Adolescent↗
PubMedDate not supplied

[The immunogenetic parameters in acute and chronic glomerulonephritis in children].

Our studies suggest that children with primary diffuse glomerulonephritis have some peculiarities in the presentation of certain HLA antigens, their phenotypical and haplotypical combinations relevant to the disease risk and course variants prognosis. Children whose tissue antigens refer them to high risk group in relation to glomerulonephritis require continuous monitoring of clinical, laboratory and immunological parameters. Tissue typing can detect children predisposed to developing acute and chronic glomerulonephritis, prompt optimal treatment and follow-up policy, predict trends in the disease course.

Acute Disease↗
PubMed1994

[Relation between histo-compatibility antigen immunogenetics and pregnancy induced hypertension].

Fourty cases with pregnancy induced hypertension (PIH) and 100 normal pregnant women were selected for this study. The distribution of histo-compatibility antigen D region (HLA-DR) frequency, the frequency of homozygosity and the HLA-DR antigens sharing between partners were investigated. The results showed that the frequency of HLA-DR4 was significantly higher in PIH than that in normal pregnancy (P < 0.001). There was a very high DR antigen sharing between partners in PIH as compared to normal pregnancy (P < 0.01), specially obvious in the frequency of DR4 antigen sharing in PIH (P < 0.0001). There was, however, no significant difference in the frequency of homozygosity or heterozygosity between HLA-DR and DR4 locus. This study suggested that HLA-DR4 may be related to the genetic susceptibility of PIH. This correlation is presumably due to a linkage imbalance of susceptible gene of PIH and DR4, but whether DR4 acts directly as an immunodeficient gene remains to be determined.

Adult↗
PubMed1995

Isolated congenital complete heart block: longterm outcome of children and immunogenetic study.

OBJECTIVE: To assess the longterm cardiologic and immunologic outcome of children with isolated congenital complete heart block (CCHB) and their HLA antigens. METHODS: Sixteen children with isolated CCHB were investigated. HLA typing was done using a microcytotoxicity test. RESULTS: Three patients died (18.7%), one in utero (35 weeks), one 2 days after birth, and one at 6 years of age. The mean age of the 13 living children is now 18.3 years (range 2-34). Eight (50%) have been permanently paced for symptoms. No patient developed clinical symptoms or serological abnormalities suggesting immune disease. The A31 antigen was more prevalent, but one pair of HLA identical twins was observed, and only one had CCHB. CONCLUSION: Patients with isolated CCHB have significant cardiac mortality, and after a long followup many of them are paced to control symptoms, but in our small sample those who survive the perinatal period mostly lead a normal life. The longterm immunological outcome of these children seems good. CCHB is not related to a specific HLA pattern in affected children.

Adolescent↗