[Genetic aspects of rheumatic diseases]

Area of Science:

• Rheumatology
• Medical Genetics
• Immunogenetics

Background:

• Rheumatic diseases, including rheumatoid arthritis (RA), ankylosing spondylitis (AS), and osteoarthrosis, have complex etiologies with suspected genetic components.
• Long-term studies are crucial for elucidating the hereditary patterns of these conditions.

Purpose of the Study:

• To analyze the hereditary predisposition to rheumatism, RA, AS, and osteoarthrosis.
• To determine the inheritance patterns, heritability, and genotype penetrance for rheumatism and RA.
• To assess genetic heterogeneity and associations with HLA antigens for these diseases.

Main Methods:

• Analysis of hereditary patterns and heritability ratios.
• Application of the autosomal one-allele locus (SAL-2) model for genotype penetrance assessment.
• Evaluation of additive and dominant genetic components.
• Genetic heterogeneity testing.
• Association studies with Human Leukocyte Antigen (HLA) antigens.
• Analysis of candidate genes (COLIA2, TCRB, TCRD) for RA predisposition using DNA polymorphism.

Main Results:

• Data on the type of inheritance and heritability of rheumatic diseases were collected.
• Penetrance of specific genotypes for rheumatism and RA was determined using the SAL-2 model.
• The contribution of additive and dominant genetic factors was assessed for rheumatism and RA.
• Genetic heterogeneity and associations with HLA antigens were evaluated.
• Candidate genes COLIA2, TCRB, and TCRD were tested for their role in RA predisposition.

Conclusions:

• The study provides insights into the genetic basis of rheumatic diseases, particularly RA.
• Understanding these genetic factors can inform future research on disease mechanisms and potential therapeutic targets.
• Further investigation into candidate genes and HLA associations may clarify the genetic architecture of rheumatic diseases.