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Most cancer cells displayed moderate cytoplasmic immunoreactivity. Strong positivity was observed in a majority of melanomas and several cases of gastric, cervical, prostate and colorectal cancers. Several lymphomas and renal cancers were weakly stained.
Weak to moderate cytoplasmic staining was seen in most cancers, strongest staining in colorectal, prostate, breast, ovarial, skin and testis cancers. Malignant lymphomas, gliomas and liver cancers were virtually negative.
This gene encodes a tumor suppressor protein that is ubiquitously expressed in normal tissues. In uveal melanomas, expression of this protein is silenced in rapidly metastasizing and metastatic tumor cells but has normal expression in slowly metastasizing or nonmetastasizing tumor cells. This protein may have a role in cell-cycle control by interacting with the Cdk1/cyclinB1 complex. This gene is located on chromosomal region 8p22. Loss of heterozygosity (LOH) in the 8p arm is a common characteristic of many types of cancer. [provided by RefSeq, Nov 2009]