alexa Biallelic inactivation of the RIZ1 gene in human gastric cancer.
Oncology

Oncology

Journal of Cancer Science & Therapy

Author(s): Tokumaru Y, Nomoto S, Jernimo C, Henrique R, Harden S,

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Abstract The distal short arm of chromosome 1 is commonly deleted in a variety of human neoplasms including gastrointestinal cancer. Genetic alterations of the retinoblastoma protein-interacting zing-finger gene (RIZ)1 including loss of heterozygosity (LOH) at 1p36, frameshift mutations, and promoter hypermethylation were reported previously in several cancers. In this study, we evaluated RIZ1 in 30 primary gastric cancers and found frameshift mutations in two cases (6.7\%). Moreover, using real-time quantitative methylation-specific PCR, methylation of the RIZ1 promoter was detected in 11 (37\%) cases. In all 11 cases with methylation, inactivation of the second allele occurred through frameshift mutation, LOH or promoter methylation. Our results suggest that RIZ1 is a specific target of inactivation in human gastric cancer. This article was published in Oncogene and referenced in Journal of Cancer Science & Therapy

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