title: Risk of human T-lymphotropic virus type I-associated diseases in Jamaica with common HLA types.
abstract: Human T-lymphotropic virus-I (HTLV-I) causes adult T-cell leukemia/lymphoma (ATL) and HTLV-associated myelopathy/tropical spastic paraparesis (HAM/TSP). We postulated a higher disease risk for people with common human leukocyte antigen (HLA) types, due to a narrower immune response against viral or neoplastic antigens, compared to people with uncommon types. HLA class-I (A,B) and class-II (DRB1, DQB1) allele and haplotype frequencies in 56 ATL patients, 59 HAM/TSP patients and 190 population-based, asymptomatic HTLV-I-infected carriers were compared by logistic regression overall (score test) and with odds ratios (ORs) for common types (prevalence >50% of asymptomatic carriers) and by prevalence quartile. HTLV-I proviral load between asymptomatic carriers with common versus uncommon types was compared by t-test. ATL differed from asymptomatic carriers in overall DQB1 allele and class-I haplotype frequencies (p </=</= 0.04). ATL risk was increased significantly with common HLA-B (OR 2.25, 95% CI 1.19-4.25) and DRB1 (OR 2.11, 95% CI 1.13-3.40) alleles. Higher prevalence HLA-B alleles were associated with higher ATL risk (OR 1.14 per quartile, p(trend) = 0.02). Asymptomatic carriers with common HLA-B alleles had marginally higher HTLV-I proviral load (p = 0.057). HAM/TSP risk did not differ consistently with common HLA types. Thus, ATL risk, but not HAM/TSP risk, was increased with higher prevalence HLA-B alleles. Perhaps breadth of cellular immunity affects risk of this viral leukemia/lymphoma.
authors: Viral Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD, USA. goedertj@mail.nih.gov
authors: James J
authors: JJ
authors: Goedert
authors: Hong-Chuan
authors: HC
authors: Li
authors: Xiao-Jiang
authors: XJ
authors: Gao
authors: Nilanjan
authors: N
authors: Chatterjee
authors: Shunro
authors: S
authors: Sonoda
authors: Robert J
authors: RJ
authors: Biggar
authors: Beverley
authors: B
authors: Cranston
authors: Norma
authors: N
authors: Kim
authors: Mary
authors: M
authors: Carrington
authors: Owen
authors: O
authors: Morgan
authors: Barrie
authors: B
authors: Hanchard
authors: Michie
authors: M
authors: Hisada
mesh_terms: D000483:Alleles; D006680:HLA Antigens / Q000235:genetics / Q000276:immunology*; D015490:HTLV-I Infections / Q000453:epidemiology* / Q000276:immunology; D006801:Humans; D007563:Jamaica / Q000453:epidemiology; D015995:Prevalence; D012307:Risk Factors
chemical_list: D006680:HLA Antigens