Dengue HLA associations in Jamaicans

Area of Science:

• Immunogenetics
• Infectious Diseases

Background:

• Human leukocyte antigen (HLA) gene polymorphisms may influence susceptibility to dengue fever (DF) and its severe forms (DHF/DSS).
• Understanding these genetic associations is crucial for predicting disease risk and severity.

Purpose of the Study:

• To investigate the association between HLA class I and II alleles and dengue infection in a Jamaican population.
• To identify specific HLA alleles that confer susceptibility or protection against dengue fever.

Main Methods:

• A DNA-based HLA typing method was employed.
• HLA class I and II alleles were determined in 50 dengue patients (45 DF, 5 DHF) and 177 healthy controls from Jamaica.

Main Results:

• HLA-A*24 and HLA-DRbeta5*01/02 alleles were significantly associated with dengue infection.
• HLA-A*23, -CW*04, -DQbeta*02, -DQbeta*03, and DQbeta*06 alleles demonstrated a protective effect against dengue.

Conclusions:

• This study is the first to report a significant association between HLA-A*24 and DF in Jamaicans.
• Observed HLA associations in Jamaicans differ from those in other ethnic groups, highlighting population-specific genetic influences.
• Further research with larger DHF cohorts and functional studies is needed to elucidate HLA allelic associations with dengue in this population.