Cancer risks for MLH1 and MSH2 mutation carriers.

Cancer risks for MLH1 and MSH2 mutation carriers.
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DOI:
10.1002/humu.22262
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发表时间:
2013-03
期刊:
影响因子:
3.9
通讯作者:
Jenkins, Mark A.
Jenkins, Mark A.
中科院分区:
医学2区
文献类型:
--
作者:
Dowty, James G.;Win, Aung K.;Buchanan, Daniel D.;Lindor, Noralane M.;Macrae, Finlay A.;Clendenning, Mark;Antill, Yoland C.;Thibodeau, Stephen N.;Casey, Graham;Gallinger, Steve;Le Marchand, Loic;Newcomb, Polly A.;Haile, Robert W.;Young, Graeme P.;James, Paul A.;Giles, Graham G.;Gunawardena, Shanaka R.;Leggett, Barbara A.;Gattas, Michael;Boussioutas, Alex;Ahnen, Dennis J.;Baron, John A.;Parry, Susan;Goldblatt, Jack;Young, Joanne P.;Hopper, John L.;Jenkins, Mark A.

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我们研究了来自结肠癌家族登记处的 166 个 MLH1 和 224 个 MSH2 突变携带家族的 17,576 名成员。使用以确定标准为条件的改良分离分析来估计携带者患结直肠癌(CRC)、子宫内膜癌(EC)和其他癌症的平均累积风险。使用多基因风险修饰符研究风险的异质性。 MLH1和MSH2突变携带者到70岁时的平均CRC累积风险(95%置信区间)估计男性携带者分别为34%(25%-50%)和47%(36%-60%),女性携带者为36%(25%-51%)和37%(27%-50%)。相应的EC风险分别为18%(9.1%-34%)和30%(18%-45%)。观察到高水平的 CRC 风险异质性 (p<0.001),估计到 70 岁的累积风险遵循 U 形分布。例如,17% 的男性 MSH2 突变携带者估计终生风险为 0-10%,而 18% 的男性 MSH2 突变携带者的终生风险为 90-100%。因此,这两个基因的平均风险相似,但平均风险存在很大的个体差异,以至于很大一部分携带者的终生癌症风险非常低或非常高。我们对 MLH1 和 MSH2 突变携带者的 CRC 和 EC 累积风险的估计是目前最精确的。
We studied 17,576 members of 166 MLH1 and 224 MSH2 mutation-carrying families from the Colon Cancer Family Registry. Average cumulative risks of colorectal cancer (CRC), endometrial cancer (EC) and other cancers for carriers were estimated using modified segregation analysis conditioned on ascertainment criteria. Heterogeneity in risks was investigated using a polygenic risk modifier. Average CRC cumulative risks to age 70 years (95% confidence intervals) for MLH1 and MSH2 mutation carriers, respectively, were estimated to be 34% (25%-50%) and 47% (36%-60%) for male carriers and 36% (25%-51%) and 37% (27%-50%) for female carriers. Corresponding EC risks were 18% (9.1%-34%) and 30% (18%-45%). A high level of CRC risk heterogeneity was observed (p<0.001), with cumulative risks to age 70 years estimated to follow U-shaped distributions. For example 17% of male MSH2 mutation carriers have estimated lifetime risks of 0-10% while 18% have risks of 90-100%. Therefore, average risks are similar for the two genes but there is so much individual variation about the average that large proportions of carriers have either very low or very high lifetime cancer risks. Our estimates of CRC and EC cumulative risks for MLH1 and MSH2 mutation carriers are the most precise currently available.
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