Abstract:
:MUTYH is associated with colorectal cancer (CRC) risk. We studied the frequency of MUTYH and risk of CRC in Arabs, North African and European Jews. Participants were all 593 Sephardi Moroccan Jews (232 cases, 361 controls) and all 631 Arabs (327 cases, 304 controls) recruited into a population-based study of colorectal cancer in Israel, as well as a random sample of 189 Ashkenazi Jewish cases. Two MUTYH mutations, G396D and Y179C, were studied in 1,413 individuals, with MUTYH sequence analysis in 46 cases with CRC in a sibling or adenoma. No carriers of mutations in MUTYH were identified in Ashkenazi Jews and only one in Arabs. In Sephardi Jews, 28 carriers of G396D, 25 (4.2%) heterozygotes and 3 (0.5%) homozygotes were identified. Four (0.7%) were heterozygote carriers of the Y179C mutation. Two compound heterozygous carriers of Y179C and G396D were identified. Homozygote carriers of G396D had nonsignificantly elevated risk of CRC (OR = 11.0, 95% CI: 0.91-213.9, p = 0.06), and combined bi-allelic carriers of G396D and Y179C had increased risk, OR = 17.4, 95% CI = (1.9-316.7, p = 0.009). Four of five bi-allelic carriers reported a family history of CRC. Sequencing of 46 colorectal cancer cases with family history and additional adenomas, did not identify any other non-founder mutations. MUTYH carriers of the two common founder mutations are profoundly under-represented among both Ashkenazi Jews and Arabs. The prevalence of MUTYH carriers of the common mutations is much higher in Sephardi Jews. Bi-allelic carriers of mutations in MUTYH, are associated with highly risk of colorectal cancer.
journal_name
Fam Cancerjournal_title
Familial cancerauthors
Lejbkowicz F,Cohen I,Barnett-Griness O,Pinchev M,Poynter J,Gruber SB,Rennert Gdoi
10.1007/s10689-012-9516-8subject
Has Abstractpub_date
2012-09-01 00:00:00pages
329-35issue
3eissn
1389-9600issn
1573-7292journal_volume
11pub_type
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