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Further evidence for an HLA-related recessive mutation in nasopharyngeal carcinoma among the Chinese

S. Hu,N. Day,D. Li,R. Luben,K. Cai,T. Ou-yang,B. Li,Xiaona Lu,B. Ponder

Published 2005 in British Journal of Cancer

ABSTRACT

We typed 247 cases of nasopharyngeal carcinoma (NPC), a disease predominantly of the southern Chinese, and 274 controls from the Chao Shan region of China's Guangdong province for HLA A and B. Besides confirming the established associations with A2, A33, B46 and B58 (positive associations) and A11 (negative association), the results demonstrated a number of rarer alleles with strong negative association with NPC. Our data, combined with those from the previous studies in Southern Chinese, displayed the protective effects for A31 (odds ratio (OR)=0.0; 95% confidence interval (CI)=0–0.11), B13 (OR=0.50; 95% CI=0.35–0.69), B27 (OR=0.49; 95% CI=0.25–0.92), B39 (OR=0.18; 95% CI=0.06–0.48) and B55 (OR=0.32; 95% CI=0.14–0.68), the ORs comparing individuals with or without each allele. Other ethnic groups do not display such large HLA-associated variation in NPC risk. We show that a linked NPC gene with dominant mode of action could not generate such large protective effects. The results provide strong supporting evidence for the existence of a southern Chinese specific, recessive NPC gene closely linked to the HLA region as a major determinant of the Chinese risk for the disease.

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