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HLA phenotypes in healthy aged subjects

C Papasteriades¹, K Boki, H Pappa

¹Department of Immunology and Histocompatibility, Evangelismos Hospital, Athens, Greece.

|January 1, 1997

Summary

This study investigated human leukocyte antigen (HLA) associations with longevity. Certain HLA antigens, like HLA-B16 and HLA-DR7, were more frequent in centenarians, suggesting a genetic influence on lifespan.

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Area of Science:

Immunogenetics
Gerontology
Human Genetics

Background:

The genetic factors influencing human longevity are not fully understood.
Human leukocyte antigen (HLA) genes play a critical role in immune response and have been implicated in various age-related conditions.

Purpose of the Study:

To investigate the association between specific HLA-A, HLA-B, and HLA-DR antigens and longevity in an elderly population.
To identify potential genetic markers linked to exceptional lifespan.

Main Methods:

Typing of HLA-A, HLA-B, and HLA-DR antigens in 171 healthy elderly subjects (75-104 years) and 405 healthy younger controls (18-65 years).
Statistical analysis to compare antigen and haplotype frequencies between the elderly and control groups.

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Main Results:

Increased frequencies of HLA-B16 and HLA-DR7 were observed in the elderly group compared to controls.
Decreased frequencies of HLA-B15 and HLA-DR4 were noted in the elderly cohort.
Specific haplotypes showed altered frequencies: HLA-B15DR4 was absent, HLA-A1B8 and HLA-B8DR3 were less frequent, while HLA-B13DR7 was more frequent in the elderly.

Conclusions:

The observed differences in HLA antigen and haplotype frequencies suggest a potential genetic influence of the HLA system on human longevity.
These findings support the hypothesis that specific genetic backgrounds may be associated with extended lifespan.