Genome-wide association study on liver function tests in Chinese
Sun Yidan,1, Tian Zizhao1, Zhou Wei1, Li Mo1, Huai Cong1, He Lin1, Qin Shengying,11 Bio-X Institute, Shanghai Jiaotong University, Shanghai 200030, China
Abstract Keywords:Liver function tests;total bilirubin;alkaline phosphatase;γ-glutamyl transpeptidase;genome-wide association study
PDF (1197KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 孙一丹, 田子钊, 周伟, 李沫, 怀聪, 贺林, 秦胜营. 中国人群肝功能检测指标全基因组关联分析研究. 遗传[J], 2021, 43(3): 249-260 doi:10.16288/j.yczz.20-435 Sun Yidan. Genome-wide association study on liver function tests in Chinese. Hereditas(Beijing)[J], 2021, 43(3): 249-260 doi:10.16288/j.yczz.20-435
LFTs的检测指标——肝酶和胆红素是受多基因和环境因素决定的复杂性状。其中,环境因素包括年龄、性别、饮食习惯、身体质量指数(body mass index, BMI)、吸烟、饮酒等[7];而国内外的众多研究也提示了基因多态性对肝功能指标的影响。一项基于丹麦双生子的研究发现ALT、GGT和胆红素等肝功能指标具有高遗传力(35%~61%),且这些指标的遗传力独立于饮酒和BMI等环境因素[8]。几项全基因组关联研究(genome-wide association studies, GWAS)也发现了与外周血中肝酶和胆红素水平相关的基因,如GGT1影响GGT水平,ABO与ALP水平相关,CPN1和PNPLA可能影响ALT,UGT1A1与胆红素相关,PNPLA3与AST和ALT有关。同时,这些基因对肝功能指标的影响呈现明显的种族差异 性[5,9,10]。中国是肝脏疾病的高发地区,为了更好地使用LFTs指标辅助疾病诊断,有必要加深对影响肝功能指标的非疾病因素的理解,因此深入研究影响中国人群的肝功能指标的遗传特征非常重要。本研究利用英国生物银行(UK Biobank)中的中国人基因分型数据进行全基因组关联分析研究,旨在评估中国人群中与肝功能指标相关的单核苷酸多态性(single nucleotide polymorphism, SNP)风险位点。
1 对象与方法
1.1 实验对象
本研究入组了UK Biobank[11]中的1653名中国人,经申请,获得了他们的基因信息和表型信息,申请号为(Application 34716)。基因型由UK Biobank通过Affymetrix UK BiLEVE Axiom和Affymetrix UK Biobank Axiom两种芯片获得超过800,000个SNP,覆盖率超过95%[12]。表型信息包括电子病历所记录的患病史和血液生化指标检测等。
A:TB-GWAS 2号染色体;B:ALP-GWAS 9号染色体;C:ALP-GWAS 8号染色体;E:GGT-GWAS 22号染色体;F:GGT-GWAS 3号染色体;G:AST-GWAS 2号染色体。紫色菱形为最显著SNP位点,灰色圆点为SNP位点,蓝色曲线为重组率,下方为注释基因箭头表示转录方向。 Fig. 4Regional plot of regions associated with Chinese liver function tests
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