aberrant crypt foci/tyrosine

The present study was designed to investigate the modulatory role of dietary curcumin on (i) azoxymethane (AOM)-induced ornithine decarboxylase (ODC), tyrosine protein kinase (TPK) and arachidonic acid metabolism in liver and colonic mucosa of male F344 rats, (ii) in vitro arachidonic acid

Aberrant crypt foci (ACF), the earliest neoplastic lesions of the colon, have genetic and epigenetic alterations. Loss of heterozygosity (LOH) of tumor suppressor gene loci is seen in most colon cancers, but it is not known how early in tumorigenesis this takes place. Nine microsatellite markers

Overexpression of the receptor tyrosine kinase Met is an early event in the colorectal adenoma-carcinoma sequence. This suggests a link with disruption of adenomatous polyposis coli-controlled regulation of beta-catenin/T-cell factor (TCF)-mediated transcriptional activation, which is crucial in

OBJECTIVE Protein tyrosine kinase 6 (PTK6) is expressed throughout the gastrointestinal tract and is a negative regulator of proliferation that promotes differentiation and DNA-damage-induced apoptosis in the small intestine. PTK6 is not expressed in normal mammary gland, but is induced in most

Previous work from this laboratory established that caffeic acid esters, present in the propolis of honey bee hives, are potent inhibitors of human colon tumor cell growth, suggesting that these compounds may possess antitumor activity against colon carcinogenesis. The present study was designed to

OBJECTIVE The protein tyrosine phosphatase non-receptor type 2 (PTPN2) is known to mediate susceptibility to inflammatory bowel diseases. Cell culture experiments suggest that PTPN2 influences barrier function, autophagy and secretion of pro-inflammatory cytokines. PTPN2 knockout mice die a few

Many studies have been conducted to assess the potential preneoplastic nature of colonic aberrant crypt foci (ACF), but still the biological significance of these foci and their relationship to colon neoplasia remains to be elucidated. In the present paper a battery of variables suggested to be

Garcinol, from the fruit rind of Garcinia indica and other species, has been reported to suppress colonic aberrant crypt foci (ACF) formation in rats. In this study, we investigate the beneficial effects of tumor prevention by garcinol on the human colorectal cancer cell line, HT-29. Focal adhesion

Galectin-3 (Gal-3) is a multifunctional protein that plays different roles in cancer biology. To better understand the role of Gal-3 and its ligands during colon carcinogenesis, we studied its expression in tumors induced in rats treated with 1,2-dimethylhydrazine (DMH) and in human tissues. Normal

Although in Fischer-344 rats, aging is associated with increased activation of EGF-receptor (EGFR) in mucosa of much of the gastrointestinal tract, including the colon, regulation of this process is poorly understood. We hypothesize that loss of suppressor of EGFR may partly be responsible for this

Experimental models have several advantages in the study of colon cancer. They can be used to tightly control diet, examine putative intermediate markers, test hypotheses about mechanisms of carcinogenesis, and quantify development of tumors in a short time. Dietary issues that have been studied in

Incidence rates of colorectal cancer are relatively low in Asian populations, in which soy foods are commonly consumed. Soybeans and soy foods are an almost exclusive source of isoflavone intake. In in vitro studies, isoflavones have been shown to have various anticarcinogenic properties such as