TY - JOUR
T1 - Genetic polymorphisms of CCL2 associated with susceptibility to latent tuberculous infection in Thailand
AU - Nonghanphithak, D.
AU - Reechaipichitkul, W.
AU - Namwat, W.
AU - Lulitanond, V.
AU - Naranbhai, V.
AU - Faksri, K.
N1 - Funding Information:
The study was supported by the Thailand Research Fund, Bangkok (Grant number MRG5580024) and the Faculty of Medicine, Khon Kaen University (KKU), Khon Kaen, Thailand (Grant Number IN58110). The authors thank Professor D Blair for editing the article via the Publication Clinic KKU.
Publisher Copyright:
© 2016 The Union.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - BACKGROUND: The extent to which individuals exhibit genetic susceptibility to tuberculosis (TB) is still unclear. Genetic variations in chemokine genes might influence the early clearance of Mycobacterium tuberculosis, affecting TB susceptibility. OBJECTIVES: To study single nucleotide polymorphisms (SNPs) of chemokine genes CCL2, CXCL9, CXCL10 and CXCL11, and their association with TB susceptibility. DESIGN: Of 248 participants enrolled, 49 had active TB, 43 had latent tuberculous infection (LTBI) and 156 were non-infected, including 24 healthy controls with no known TB exposure. These populations were divided into two groups based on TB exposure: susceptible (n = 92) and resistant (early clearance) (n= 132). RESULTS: Only CCL2 SNPs (-2518A/G) were significantly associated with increased TB susceptibility. Based on adjusted multivariate analysis, persons with the GG genotype at this SNP were twice as susceptible to TB as those with the AA genotype (P = 0.018, OR 2.880, 95%CI 1.201-6.903). Risk of LTBI was three times higher among those with GG (P = 0.003, OR 3.358, 95%CI 1.525-7.396 for AA+AG vs. GG and P = 0.012, OR 3.706, 95%CI 1.340-10.254 for AA vs. GG). Persons with the GG genotype produced significantly lower CCL2 levels in response to M. tuberculosis antigen stimulation (AA+AG vs. GG, P = 0.038). CONCLUSION: The CCL2 polymorphism (-2518A/G) was associated with susceptibility to LTBI in a North-East Thai populations.
AB - BACKGROUND: The extent to which individuals exhibit genetic susceptibility to tuberculosis (TB) is still unclear. Genetic variations in chemokine genes might influence the early clearance of Mycobacterium tuberculosis, affecting TB susceptibility. OBJECTIVES: To study single nucleotide polymorphisms (SNPs) of chemokine genes CCL2, CXCL9, CXCL10 and CXCL11, and their association with TB susceptibility. DESIGN: Of 248 participants enrolled, 49 had active TB, 43 had latent tuberculous infection (LTBI) and 156 were non-infected, including 24 healthy controls with no known TB exposure. These populations were divided into two groups based on TB exposure: susceptible (n = 92) and resistant (early clearance) (n= 132). RESULTS: Only CCL2 SNPs (-2518A/G) were significantly associated with increased TB susceptibility. Based on adjusted multivariate analysis, persons with the GG genotype at this SNP were twice as susceptible to TB as those with the AA genotype (P = 0.018, OR 2.880, 95%CI 1.201-6.903). Risk of LTBI was three times higher among those with GG (P = 0.003, OR 3.358, 95%CI 1.525-7.396 for AA+AG vs. GG and P = 0.012, OR 3.706, 95%CI 1.340-10.254 for AA vs. GG). Persons with the GG genotype produced significantly lower CCL2 levels in response to M. tuberculosis antigen stimulation (AA+AG vs. GG, P = 0.038). CONCLUSION: The CCL2 polymorphism (-2518A/G) was associated with susceptibility to LTBI in a North-East Thai populations.
KW - CXCR3 ligands
KW - Early clearance
KW - Mycobacterium tuberculosis
KW - Single nucleotide polymorphism
UR - http://www.scopus.com/inward/record.url?scp=84982124662&partnerID=8YFLogxK
U2 - 10.5588/ijtld.16.0017
DO - 10.5588/ijtld.16.0017
M3 - Article
C2 - 27510253
AN - SCOPUS:84982124662
SN - 1027-3719
VL - 20
SP - 1242-1248 and i-iv
JO - International Journal of Tuberculosis and Lung Disease
JF - International Journal of Tuberculosis and Lung Disease
IS - 9
ER -
