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Title: [Prediction of KCNQ4gene polymorphism varies with CNE or noise exposure duration on the Risk of NIHL-Cox model analysis based on cohort study].
Author: Zhou WH, Gu GZ, Wu H, Li YH, Chen GS, Zhang HL, Yu SF, Zheng YX.
Journal: Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi; 2020 Feb 20; 38(2):111-116. PubMed ID: 32306673.
Abstract:
Objective: The purpose of this study was to explore the association between gene in the potassium recycling pathway 4 (KCNQ4) polymorphisms and the susceptibility to noise-induced hearing loss (NIHL) , and analysis the effect of cumulative noise exposure (CNE) and noise exposure duration on this association. Methods: A nested case-control study with 1∶1 matched was used based on the cohort of noise exposure in a steel factory. A total of 286 cases were selected as the group of hearing loss and 286 controls were chosen according to the matching standards of same gender, same type of work, age difference ≤ 5 years, noise exposure duration ≤ 2 years. The single nucleotide polymorphisms (SNPs) of rs4660468, rs4660470, rs34287852 in KCNQ4 were genotyped by SNPscan(TM) method. The codominant, dominant and recessive models were established to study KCNQ4 polymorphisms and the susceptibility to NIHL by single-factor conditional logistic regression analysis. The COX regression analysis was used to analyze the risk of developing NIHL in individuals with different genotypes along with the extending of noise exposure duration or CNE. Results: In the case of CNE≤96 dB (A) ·year, the risk of developing NIHL in individuals with TA genotype of rs4660470 was 2.197 times than individuals with TT genotypes (95%CI: 1.032~4.677) , and those with TA+AA and TT genotypes (HR=2.467, 95%CI: 1.025~5.934) With the increase of noise exposure duration, in rs4660470, individuals with TA genotype had a higher risk of suffering NIHL than those with TT genotype (HR=1.461, 95%CI: 1.061~2.011) , individuals with TA and/or AA genotype had a earlier risk of suffering NIHL than those with TT genotype. Conclusion: The mutant allele A of rs4660470 in KCNQ4 may be a risk factor for developing NIHL, CNE≤100 dB (A) ·year or the increase of noise exposure duration may further increase the risk of NIHL. 目的： 探讨钾离子通道4（potassium channel 4，KCNQ4）基因多态性在不同累积噪声暴露量（cumulative noise exposure，CNE）或不同接噪工龄状况下与噪声性听力损失（noise-induced hearing loss，NIHL）易感性间的关系。 方法： 于2019年7月采用1∶1巢式病例-对照研究，在河南省某钢铁厂噪声暴露队列研究人群中选择有双耳高频（3 000、4 000、6 000 Hz）平均听阈≥40 dB者为听力损失组，纯音听力测试任一耳语频（500、1 000、2 000 Hz）的任一频段听阈均≤25 dB，且纯音听力测试高频平均听阈<35dB者作为对照组，听力损失组和对照组各286例。对调查对象进行一般体格检查和基本信息调查，进行纯音听力测试和作业场所噪声测量，采用中高通量单核苷酸多态性（single nucleotide polymorphisms，SNP）分型检测技术（SNPscan(TM)法）检测KCNQ4基因3个SNP（rs4660468，rs4660470和rs34287852位点）。检验对照组人群的哈温平衡（Hardy-Weinberg equilibrium）。应用COX回归方法分析基因单个位点与NIHL易感性间的关系以及随着CNE和接噪工龄的改变，不同基因型个体发生NIHL的风险大小。 结果： 本次研究对象男性274人，女性12人,年龄、性别、饮酒、接噪工龄、CNE、高血压患病情况的分布差异无统计学意义（P>0.05），而吸烟、双耳高频平均听阈均值分布差异有统计学意义（P<0.05）。校正了协变量年龄、接噪工龄、噪声暴露水平、吸烟、饮酒和高血压后，发现CNE≤96 dB（A）·年分层下，在共显性模型TA/TT下，rs4660470位点携带TA基因型的个体发生NIHL的风险是携带TT基因型个体的2.197倍（95%CI：1.032~4.677，P<0.05）；96<CNE≤100 dB（A）·年分层下，在显性模型TA+AA/TT下，携带TA+AA基因型的个体发生NIHL的风险是携带TT基因型个体2.467倍（95%CI：1.025~5.934，P<0.05）。随着接噪工龄的延长，rs4660470位点携带TA基因型的个体患NIHL的风险是携带TT基因型个体的1.461倍（95%CI：1.061~2.011，P<0.05）；携带TA和AA基因型的个体患NIHL的风险高于携带TT基因型的个体（HR=1.415，95%CI：1.039~1.927，P<0.05），且携带TA和/或AA基因型的个体出现NIHL的时间早于携带TT基因型的个体。 结论： KCNQ4基因的rs4660470位点突变型等位基因A可能是NIHL发生的一个危险因素，CNE≤100 dB（A）·年或接噪工龄延长可能会进一步增加NIHL易感性的风险。.

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