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  • Title: Ectopic hCGbeta expression by epithelial cancer: malignant behaviour, metastasis and inhibition of tumor cell apoptosis.
    Author: Iles RK.
    Journal: Mol Cell Endocrinol; 2007 Jan 02; 260-262():264-70. PubMed ID: 17069968.
    Abstract:
    Ectopic expression of the beta-subunit of human chorionic gonadotropin (hCG) is now a recognized phenomenon in 20-40% of all common epithelial carcinoma arising from mucosal epithelia such as bladder, cervix, lung and naso-pharynx. Recent studies have shown that it acts as an autocrine growth factor by inhibiting apoptosis. Structural homology and in vitro studies suggest that it may achieve this by inhibition of the transforming growth factor beta (TGFbeta) receptor complex. Such a molecular mechanism would go some way to explaining ectopic hCGbeta's association with poor prognosis and tumors that will rapidly progress to metastasis.
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