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Ann Rheum Dis:研究 揭示汉族人群强直性脊柱炎关联基因

2018-12-17 佚名 复旦大学新闻网

近日,复旦大学生命科学学院教授王久存和附属华山医院教授邹和建联合课题组合作发现汉族人群中强直性脊柱炎的新易感位点,为进一步探讨强直性脊柱炎的发病机制提供新的理论基础。12月14日,相关研究成果以“Genetic Association of non-MHC region with Ankylosing Spondylitis in a Chinese Population”为题在线发表在《Anna

近日,复旦大学生命科学学院教授王久存和附属华山医院教授邹和建联合课题组合作发现汉族人群中强直性脊柱炎的新易感位点,为进一步探讨强直性脊柱炎的发病机制提供新的理论基础。12月14日,相关研究成果以“Genetic Association of non-MHC region with Ankylosing Spondylitis in a Chinese Population”为题在线发表在《Annals of Rheumatic Disease》杂志。

强直性脊柱炎是一种常见的脊柱关节病,主要累及部位为骶髂关节和脊柱关节。该病大多为青年时期发病,一旦发病终身罹患,给患者带来巨大的生理、心理痛苦,同时也成为沉重的社会负担。


图1:强直性脊柱炎骨骼解剖图

强直性脊柱炎是目前已知的遗传度最高的复杂性疾病,其遗传度大于90%。国际上通过多个全基因组关联分析,在欧美人群中共发现120余个易感基因位点,解释度达30%左右,但汉族人群的大样本、系统性易感基因研究基本缺如。由于缺乏汉族人群疾病遗传背景的相关数据,难以获得跨种族的易感及致病基因位点,对发病机制研究以及新的治疗靶点发现带来困难。


图2:B3GNT2和SULT1A2基因表达水平与基因型密切相关

王久存、邹和建联合课题组长期从事强直性脊柱炎的遗传学研究。该研究通过对来自于附属华山医院等多中心的强直性脊柱炎生物样本进行系统检测,发现在中国人群中存在六个显着的易感基因位点,其中位于2号染色体的基因位点(rs6759298)可以调控B3GNT2基因的表达量。B3GNT2参与调控糖胺聚糖代谢通路从而可引发骶髂部位的炎症,且前人发现B3GNT2敲除小鼠可出现数个白介素指标异常。rs75301646位点可调控SULT1A2的表达量,SULT1A2敲除小鼠可发生免疫细胞分化及骨赘生长异常。本研究获得了数个中美人群共有的疾病易感位点,发现2号染色体的基因间区对于强直性脊柱炎的发病具有重要作用,该结果也得到了多个强直性脊柱炎领域顶级专家的认可。

原始出处:

Liu J,et al.Genetic association of non-MHC region with ankylosing spondylitis in a Chinese population.Ann Rheum Dis. 2018 Dec 14. pii: annrheumdis-2018-214625.

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    2021-06-12 Morris

    可否通过基因手段阻断强直的遗传?

    0

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    2019-10-12 zywlvao
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