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Genetic analyses in consecutive israeli jewish colorectal cancer patients.
Am J Gastroenterol. 2005 Jun; 100(6):1376-80.AJ

Abstract

OBJECTIVES

Two APC germline mutations, E1317Q and I1307K, have been linked to colorectal cancer (CRC) risk. Whereas the I1307K variant is almost exclusively encountered in (Ashkenazi) Jews, E1317Q is not restricted to certain ethnic populations. Data on its contribution to CRC risk in Jewish patients are sparse.

AIMS

To assess the contribution of E1317Q to CRC development in the Jewish population.

METHODS

A total of 538 consecutive Israeli Jewish CRC patients and 440 controls were genotyped for E1317Q. In addition, the rate of the I1307K APC missense mutation and the two predominant Jewish mutations in hMSH2, A636P, and 324delCA, associated with hereditary nonpolyposis colon cancer (HNPCC), were determined.

RESULTS

The E13117Q missense mutation was detected in 6/538 (1%) of CRC patients and 5/440 (1%) of controls. The I1307K variant was found in 8% of all patients and in 11% (35/322) of patients of Ashkenazi Jewish descent. Carriers and noncarrier CRC patients did not differ in age of onset or associated colonic adenomatous polyps. The carrier rate among controls was 5% among Ashkenazim and 1.6% among non-Ashkenazi individuals. The 324delCA hMSH2 mutation was not observed in this cohort, and 4 of 322 Ashkenazi patients (1.2%) displayed the A636P mutation.

CONCLUSION

In Jewish CRC patients the E1317Q variant plays little if any role in colorectal cancer susceptibility and genetic testing for this variant is not warranted. The I1307K mutation is associated with a moderate excess risk for CRC, but age of onset seems not to be earlier and this variant is not associated with a multiple colonic polyp phenotype. Founder mutations in hMSH2 are rare in consecutive CRC patients.

Authors+Show Affiliations

Institute of Gastroenterology and the Susanne Levy Gertner Oncogenetics Unit, Chaim Sheba Medical Center, Tel-Hashomer, Israel.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15929773

Citation

Fidder, Herma H., et al. "Genetic Analyses in Consecutive Israeli Jewish Colorectal Cancer Patients." The American Journal of Gastroenterology, vol. 100, no. 6, 2005, pp. 1376-80.
Fidder HH, Figer A, Geva R, et al. Genetic analyses in consecutive israeli jewish colorectal cancer patients. Am J Gastroenterol. 2005;100(6):1376-80.
Fidder, H. H., Figer, A., Geva, R., Flex, D., Schayek, H., Avidan, B., Meir, S. B., & Friedman, E. (2005). Genetic analyses in consecutive israeli jewish colorectal cancer patients. The American Journal of Gastroenterology, 100(6), 1376-80.
Fidder HH, et al. Genetic Analyses in Consecutive Israeli Jewish Colorectal Cancer Patients. Am J Gastroenterol. 2005;100(6):1376-80. PubMed PMID: 15929773.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Genetic analyses in consecutive israeli jewish colorectal cancer patients. AU - Fidder,Herma H, AU - Figer,Arie, AU - Geva,Ravit, AU - Flex,Dov, AU - Schayek,Hagit, AU - Avidan,Benjamin, AU - Meir,Simon Bar, AU - Friedman,Eitan, PY - 2005/6/3/pubmed PY - 2005/8/10/medline PY - 2005/6/3/entrez SP - 1376 EP - 80 JF - The American journal of gastroenterology JO - Am. J. Gastroenterol. VL - 100 IS - 6 N2 - OBJECTIVES: Two APC germline mutations, E1317Q and I1307K, have been linked to colorectal cancer (CRC) risk. Whereas the I1307K variant is almost exclusively encountered in (Ashkenazi) Jews, E1317Q is not restricted to certain ethnic populations. Data on its contribution to CRC risk in Jewish patients are sparse. AIMS: To assess the contribution of E1317Q to CRC development in the Jewish population. METHODS: A total of 538 consecutive Israeli Jewish CRC patients and 440 controls were genotyped for E1317Q. In addition, the rate of the I1307K APC missense mutation and the two predominant Jewish mutations in hMSH2, A636P, and 324delCA, associated with hereditary nonpolyposis colon cancer (HNPCC), were determined. RESULTS: The E13117Q missense mutation was detected in 6/538 (1%) of CRC patients and 5/440 (1%) of controls. The I1307K variant was found in 8% of all patients and in 11% (35/322) of patients of Ashkenazi Jewish descent. Carriers and noncarrier CRC patients did not differ in age of onset or associated colonic adenomatous polyps. The carrier rate among controls was 5% among Ashkenazim and 1.6% among non-Ashkenazi individuals. The 324delCA hMSH2 mutation was not observed in this cohort, and 4 of 322 Ashkenazi patients (1.2%) displayed the A636P mutation. CONCLUSION: In Jewish CRC patients the E1317Q variant plays little if any role in colorectal cancer susceptibility and genetic testing for this variant is not warranted. The I1307K mutation is associated with a moderate excess risk for CRC, but age of onset seems not to be earlier and this variant is not associated with a multiple colonic polyp phenotype. Founder mutations in hMSH2 are rare in consecutive CRC patients. SN - 0002-9270 UR - https://www.unboundmedicine.com/medline/citation/15929773/Genetic_analyses_in_consecutive_israeli_jewish_colorectal_cancer_patients_ L2 - http://Insights.ovid.com/pubmed?pmid=15929773 DB - PRIME DP - Unbound Medicine ER -