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 Recommended Nursing Articles

Abdominal Pain: An Approach to a Challenging Diagnosis
AACN Advanced Critical Care, July/September 2014
Free access will expire on October 13, 2014.


HIPAA Compliance Practice Tips
Professional Case Management, July/August 2014
Free access will expire on September 29, 2014.


Follow the leader: How does “followership” influence nurse burnout?
Nursing Management, August 2014
Free access will expire on September 29, 2014.


More Recommended Articles

Subscribe to Recommended Articles

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