Analysis of signaling protein kinases in human colon or colorectal carcinomas.
Extracellular signal-related kinase (ERK) and c-Jun N-terminal kinase (JNK) mitogen-activated protein (MAP) kinases are highly activated in an in vivo rat model of colorectal carcinogenesis. In addition, other protein kinases such as c-Src and c-Yes have been shown to be up-regulated in some human colon cancers. To evaluate the activity of these kinases in human colorectal carcinomas, we examined colon cancers and adjacent normal intestinal mucosa from 11 patients. Moderate increases in ERK and JNK activities, in addition to up-regulation of c-Src, p125FAK, and tyrosine-phosphorylated proteins, were observed in a subset of the colorectal carcinomas. There was a significant correlation found between levels of c-Src, p125FAK, and tyrosine-phosphorylated proteins, as well as between c-Src protein levels and JNK activity. This is the first report that examines several different kinases as markers to characterize colorectal cancers in the same carcinoma sample, allowing the determination of correlations between markers in the same tumors.
Licato
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LL
Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, 27599, USA.
Brenner
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DA
D000230:Adenocarcinoma / Q000201:enzymology* / Q000378:metabolism; D014408:Biomarkers, Tumor / Q000378:metabolism; D000081247:CSK Tyrosine-Protein Kinase; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000378:metabolism; D015815:Cell Adhesion Molecules / Q000378:metabolism; D003106:Colon / Q000201:enzymology*; D003110:Colonic Neoplasms / Q000201:enzymology* / Q000378:metabolism; D051417:Focal Adhesion Kinase 1; D051416:Focal Adhesion Protein-Tyrosine Kinases; D006801:Humans; D015151:Immunoblotting; D048031:JNK Mitogen-Activated Protein Kinases; D048052:Mitogen-Activated Protein Kinase 3; D020928:Mitogen-Activated Protein Kinases; D011494:Protein Kinases / Q000378:metabolism*; D011505:Protein-Tyrosine Kinases / Q000378:metabolism; D011972:Receptor, Insulin / Q000378:metabolism; D012004:Rectal Neoplasms / Q000201:enzymology* / Q000378:metabolism; D015398:Signal Transduction; D018808:Transcription Factor AP-1 / Q000378:metabolism; D015854:Up-Regulation; D018631:ras Proteins / Q000378:metabolism; D018909:src Homology Domains; D019061:src-Family Kinases
D014408:Biomarkers, Tumor; D015815:Cell Adhesion Molecules; D018808:Transcription Factor AP-1; D011494:Protein Kinases; D011505:Protein-Tyrosine Kinases; D011972:Receptor, Insulin; D000081247:CSK Tyrosine-Protein Kinase; D051417:Focal Adhesion Kinase 1; D051416:Focal Adhesion Protein-Tyrosine Kinases; C496050:PTK2 protein, human; D019061:src-Family Kinases; C000631346:CSK protein, human; D017871:Calcium-Calmodulin-Dependent Protein Kinases; D048031:JNK Mitogen-Activated Protein Kinases; D048052:Mitogen-Activated Protein Kinase 3; D020928:Mitogen-Activated Protein Kinases; D018631:ras Proteins