Maspin, a member of the serine protease inhibitor (serpin) family, is a tumor suppressor in breast and prostate cancer. To address molecular mechanisms underlying maspin's activity, we restored its expression in invasive carcinoma cells and analyzed the resulting changes by shotgun proteomics. Using a mass spectrometry-based multidimensional proteomic method, we observed changes to the expressi...

AIMS Maspin, a 42-kDa serine proteinase inhibitor, is a tumor suppressor protein that stimulates apoptosis and inhibits motility, invasion and cancer metastasis. Mutant maspin leads to partial loss of tumor suppressor function, decreased susceptibility to apoptosis and to malignant progression. We recently found maspin expression (ME) in the cytoplasm of serrated colonic lesions, such as hyperp...

Metaplastic carcinomas of the breast (MCBs) are unusual neoplasms characterized by an admixture of glandular epithelial components, which frequently exhibit features of squamous differentiation, and mesenchymal malignant components. Regardless of the presence of myoepithelial features in MCB, no consensus concerning their putative histogenesis has yet been achieved. Recently, novel putative myo...

PURPOSE Mammary epithelial cells and the majority of breast cancer tumors require estrogen for continued growth. Antiestrogen therapy alone, or in combination with other drugs, has long been a common procedure for breast cancer treatment and prophylaxis. Thus, there is a critical need to elucidate the mechanism(s) of action of antiestrogen treatment, especially for patients who are at risk of b...

Background. The aim of this study was to investigate maspin and ezrin expression in different subtypes of periocular basal cell carcinoma (BCC). Methods. Tissue samples from 43 patients with periocular BCC. Our cases were comprised of 10 morpheaform, 25 nodular, and 8 adenoid type BCCs. Immunohistochemical staining for maspin and ezrin was performed by Envision detection system. Results. There ...

Background and objective: According to reports, a serine protease inhibitor (Maspin) suppresses metastasis, invasion and angiogenesis in breast and prostate cancers. Silibinin is a natural polyphenolic flavonoid with anti-cancer activity. We assessed the effects of silibinin on cell viability, maspin and ERα gene expression in MCF-7 cell line. <s...

We investigated p53-dependent gene expression in nitric oxide (NO)-induced apoptosis of two tumor cell types. Seventy-seven putative p53-regulated genes were screened for NO-mediated expression changes. Twenty-four genes were up-regulated and three genes were down-regulated significantly by NO in human neuroblastoma cells. Genes known to be involved in apoptosis, which were up-regulated by > or...

background: the breast cancer is the most prevalent cancer among women, on the other hand absence of myoepithelial cells play a pivotal role in pathogenesis of this cancer. thus we aimed to investigate the possible abilities of the molecular assay technique to find a relationship between mammary serine protease inhibitor (maspin) gene expression possibly secreted by myoepithelial cells, grade o...

Future curative cancer chemotherapies have to overcome tumor cell heterogeneity and plasticity. To test the hypothesis that the tumor suppressor maspin may reduce microenvironment-dependent prostate tumor cell plasticity and thereby modulate drug sensitivity, we established a new schematic combination of two-dimensional (2D), three-dimensional (3D), and suspension cultures to enrich prostate ca...

BACKGROUND Maspin, a member of the serpin family of protease inhibitors, is known to be a tumor suppressor. Although the relationship between its expression and biological significance has been investigated in several types of cancer, the clinicopathological significance of maspin expression in colorectal cancer has not been fully elucidated. MATERIALS AND METHODS The expression of maspin in ...