Somatic Mutations in Two Genes ID'd in Stomach Cancer

Mutations seen in FAT4 and ARID1A; involved in cell adhesion and chromatin remodeling

MONDAY, April 9 (HealthDay News) -- Somatic mutations have been identified in two genes, FAT4 and ARID1A, involved in cell adhesion and chromatin remodeling in some patients with stomach cancer, according to a study published online April 8 in Nature Genetics.

To investigate the somatic alterations in gastric cancer, Zhi Jiang Zang, M.B.B.S., Ph.D., from the National Cancer Centre in Singapore, and colleagues sequenced the exomes of 15 gastric adenocarcinomas and their corresponding normal DNA.

The researchers identified 718 non-silent somatic point mutations in 661 genes. TP53, PIK3CA, and ARID1A were frequently mutated in adenocarcinomas (mutated in 11, three, and three adenocarcinoma exomes, respectively). The biological pathway most enriched among the frequently mutated genes was cell adhesion. In a cadherin family gene, FAT4, prevalence screening confirmed mutations in 5 percent and genomic deletions in 4 percent of gastric tumors. In 47 percent of gastric cancers, frequent mutations were seen in chromatin remodeling genes (MLL3, MLL, and ARID1A). ARID1A mutations were detected in 8 percent of tumors, and were linked with concomitant PIK3CA mutations and microsatellite instability. Both FAT4 and ARID1A were found to exert tumor-suppressor activity in functional assays.

"Somatic inactivation of FAT4 and ARID1A may thus be key tumorigenic events in a subset of gastric cancers," Zang and colleagues conclude.

Abstract
Full Text (subscription or payment may be required)

Copyright © 2012 HealthDay. All rights reserved.

Powered by

jQuery UI Accordion - Default functionality

For life-long learning and continuing professional development, come to Lippincott's NursingCenter.

Nursing Jobs Plus
Featured Jobs
Recommended CE Articles

Debunking Three Rape Myths
Journal of Forensic Nursing, October/December 2014
Expires: 12/31/2016 CE:2.5 $24.95


Drug updates and approvals: 2014 in review
The Nurse Practitioner, 13December 2014
Expires: 12/31/2016 CE:3 $27.95


Can Food Processing Enhance Cancer Protection?
Nutrition Today, September/October 2014
Expires: 10/31/2016 CE:2 $21.95


More CE Articles

Subscribe to Recommended CE

Recommended Nursing Articles Evidence Based Practice Skin Care Network NursingCenter Quick Links What’s Trending Events