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A majority of cancer cells displayed moderate cytoplasmic positivity. Colorectal, ovarian and renal carcinomas exhibited additional membranous staining in some cases. Strong staining was observed in cases of follicular thyroid carcinomas,
melanomas and gliomas.
GENE INFORMATION
Gene name
RASSF1 (HGNC Symbol)
Synonyms
123F2, NORE2A, RDA32, REH3P21
Description
Ras association (RalGDS/AF-6) domain family member 1 (HGNC Symbol)
Entrez gene summary
This gene encodes a protein similar to the RAS effector proteins. Loss or altered expression of this gene has been associated with the pathogenesis of a variety of cancers, which suggests the tumor suppressor function of this gene. The inactivation of this gene was found to be correlated with the hypermethylation of its CpG-island promoter region. The encoded protein was found to interact with DNA repair protein XPA. The protein was also shown to inhibit the accumulation of cyclin D1, and thus induce cell cycle arrest. Several alternatively spliced transcript variants of this gene encoding distinct isoforms have been reported. [provided by RefSeq, May 2011]