Gastroenterology:MLH1, MSH2以及 MSH6突变与Lynch综合征患者结肠癌风险

2020-01-14 MedSci MedSci原创

研究发现,Lynch综合征患者中MMR基因变异特异性与腺瘤和CRC的风险相关

林奇综合征是由DNA错配修复(MMR)基因变异引起的,并与直肠癌(CRC)的风险增加有关。近日研究人员在一个国际患者队列中研究了MMR基因中Lynch综合征相关变异与腺瘤和CRC风险以及肿瘤中APC和CTNNB1体细胞突变之间的关系。

研究结合了3项研究的临床和分子数据,获得从来自德国、荷兰和芬兰的2747名与MLH1、MSH2或MSH6突变相关的Lynch综合征患者临床数据,患者接受了至少2次结肠镜检查,并中位随访7.8年。研究人员对其中48例结直肠肿瘤(16例MLH1突变患者、29例MSH2突变患者和3例MSH6突变患者)患者进行了APC和CTNNB1体细胞突变的DNA序列分析。

MSH2的致病性变异患者在10年内发生晚期腺瘤的风险为17.8%,MLH1为7.7%。在MLH1或MSH2中,致病性变异位于10 y(11.3%和11.4%)患者发展CRC的比例高于MSH6患者(4.7%)。APC的体细胞突变在75%的MSH2和11%的MLH1中存在。在50% 的MLH1病人肿瘤中发现了CTNNB1的体细胞突变,而MSH2中发现了7% 的致病变异。在MSH6患者中,无CTNN B1突变,但均存在APC突变。

研究发现,Lynch综合征患者中MMR基因变异特异性与腺瘤和CRC的风险相关。

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    2020-02-05 许安
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除了子宫切除术,用于减少错配修复基因突变(Lynch综合征)女性子宫内膜癌的风险的建议不一致。为了探讨Lynch综合征内分泌因素和子宫内膜癌的风险之间的关联,研究人员进行了这项研究。该回顾性队列研究包括1128名来自结肠癌家庭登记认定的错配修复基因突变的女性。数据采用加权方法队列分析。参加者来自美国、澳大利亚、加拿大和新西兰的全国各地的中心,在1997年的和2012年之间进行招募。分析的数据包括初

J CLIN ONCOL:多基因面板与Lynch综合征

大多数现有文献认为Lynch综合征(LS)主要是由于MLH1和MSH2基因突变而导致的一种高风险性结肠直肠癌(CRC)和子宫内膜癌的遗传综合征。这些研究大多数是以遗传性CRC和以人群分布为基础的CRC和子宫内膜癌患者进行队列研究的,可能有偏倚结果。我们的目的是描述通过多基因面板检测确定的错配修复(MMR)突变携带者的大队列,评估他们的表型,并将结果与之前的研究比较。