Human leukocyte antigens and multiple basal cell carcinomas

Area of Science:

• Immunogenetics
• Dermatology
• Human Leukocyte Antigen (HLA) research

Background:

• Previous research suggested associations between human leukocyte antigen (HLA) types and basal cell carcinoma (BCC).
• An association with HLA-DR1 and a negative association with HLA-DR4 were previously noted, though the findings were weak.

Purpose of the Study:

• To investigate the association between human leukocyte antigen (HLA) phenotypes and multiple basal cell carcinomas (BCC).
• To confirm or refute previous findings on HLA associations with BCC and identify new potential associations.

Main Methods:

• Human leukocyte antigen (HLA) typing for class I and class II antigens was performed on 49 unrelated patients with multiple BCC.
• Peripheral blood samples were analyzed using the modified lymphocytotoxicity test after T/B cell separation.
• Antigen frequencies in patients were compared to a local German population (n=716) using statistical tests.

Main Results:

• A significant decrease in HLA-DR4 frequency was observed in patients with multiple BCC (12.2% vs. 25.1%, p < 0.05).
• A significant increase in HLA-Cw7 frequency was found in the patient group (61.2% vs. 40.8%, p < 0.01).
• In a subgroup with trunk BCC, the negative association with HLA-DR4 was stronger.

Conclusions:

• The study confirms a decreased frequency of HLA-DR4 and an increased frequency of HLA-Cw7 in patients with multiple BCC.
• These HLA associations, while statistically significant, indicate a weak overall link, possibly due to disease heterogeneity.
• Further research is needed to explore the role of HLA types and other cofactors in BCC development.