|
1
|
Tang NLS, Wang X, Chang KC, Chan CY, Szeto NWS, Huang D, Wu J, Lui GCY, Leung CC, Hui M. Genetic susceptibility to Tuberculosis: Interaction between HLA-DQA1 and age of onset. INFECTION GENETICS AND EVOLUTION 2018; 68:98-104. [PMID: 30553063 DOI: 10.1016/j.meegid.2018.12.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 12/10/2018] [Accepted: 12/10/2018] [Indexed: 12/17/2022]
Abstract
Several genome-wide association studies (GWAS) identified new single nucleotide polymorphisms (SNPs) with susceptibility to Tuberculosis (TB). However, many of them were not replicated across ethnic groups. The cause of this phenomenon of genetic heterogeneity is uncertain. Here, we attempted to replicate and evaluate the mechanism that causes genetic heterogeneity in several putative TB predisposition loci found by previous GWAS, including chromosome 18q, ASAP1, DUSP14, and HLA-DQA1. A Chinese cohort of 1200 TB patients and 1280 population controls were genotyped. The results showed that genetic predisposition to TB might operate in an age-specific manner. While no significant association was found in the whole samples, a SNP of HLA-DQA1, rs9272785, showed suggestive association within the young-onset TB subgroup (onset at 20-40 years of age, N = 396). The results provide support for the hypothesis that there are different pathogenesis mechanisms causing clinical TB disease in different age groups, and that genetics probably play a substantial role only in young-onset TB.
Collapse
Affiliation(s)
- Nelson Leung-Sang Tang
- Department of Chemical Pathology and Li Ka Shing Institute of Health Sciences, Faculty of Medicine, and KIZ-CUHK Joint Laboratory of Bio-resources and Molecular Research of Common Diseases, The Chinese University of Hong Kong, Hong Kong, China.
| | - Xingyan Wang
- Department of Chemical Pathology and Li Ka Shing Institute of Health Sciences, Faculty of Medicine, and KIZ-CUHK Joint Laboratory of Bio-resources and Molecular Research of Common Diseases, The Chinese University of Hong Kong, Hong Kong, China
| | - Kwok Chiu Chang
- Tuberculosis and Chest Service, Centre for Health Protection, Department of Health, Hong Kong, China
| | - Chiu-Yeung Chan
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, China
| | - Natalie Wing-Sum Szeto
- Department of Chemical Pathology and Li Ka Shing Institute of Health Sciences, Faculty of Medicine, and KIZ-CUHK Joint Laboratory of Bio-resources and Molecular Research of Common Diseases, The Chinese University of Hong Kong, Hong Kong, China
| | - Dan Huang
- Department of Chemical Pathology and Li Ka Shing Institute of Health Sciences, Faculty of Medicine, and KIZ-CUHK Joint Laboratory of Bio-resources and Molecular Research of Common Diseases, The Chinese University of Hong Kong, Hong Kong, China
| | - Junyi Wu
- Department of Chemical Pathology and Li Ka Shing Institute of Health Sciences, Faculty of Medicine, and KIZ-CUHK Joint Laboratory of Bio-resources and Molecular Research of Common Diseases, The Chinese University of Hong Kong, Hong Kong, China
| | - Grace C Y Lui
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China; Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong, China
| | - Chi Chiu Leung
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong, China
| | - Mamie Hui
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, China
| |
Collapse
|