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Journal Article
Research Support, Non-U.S. Gov't
Sonic hedgehog-Gli1 pathway in colorectal adenocarcinomas.
World Journal of Gastroenterology : WJG 2007 March 22
AIM: To determine the role of Sonic hedgehog (Shh) pathway in colorectal adenocarcinomas through analysis of the expression of Shh pathway-related molecules, Shh, Ptch1, hedgehog-interacting protein (Hip), Gli1, Gli3 and PDGFRalpha.
METHODS: Expression of Shh in 25 colorectal adeno-carcinomas was detected by RT-PCR, in situ hybridization and immunohistochemistry. Expression of Ptch1 was observed by in situ hybridization and immunohistochemistry. Expression of Hip, Gli1, Gli3 and PDGFRalpha was analyzed by in situ hybridization.
RESULTS: Expression of cytokeratin AE1/AE3 was observed in the cytoplasm of colorectal crypts. Members of the Hh signaling pathway were expressed in colorectal epithelium. Shh was expressed in cytoplasm of dysplastic epithelial cells, while expression of Ptch1, Hip and Gli1 were mainly detected in the malignant crypts of adenocarcinomas. In contrast, PDGFRalpha was expressed highly in aberrant crypts and moderately in the stroma. Expression of Gli3 could not be detected in colorectal adenocarcinomas.
CONCLUSION: These data suggest that Shh-Ptch1-Gli1 signaling pathway may play a role in the progression of colorectal tumor.
METHODS: Expression of Shh in 25 colorectal adeno-carcinomas was detected by RT-PCR, in situ hybridization and immunohistochemistry. Expression of Ptch1 was observed by in situ hybridization and immunohistochemistry. Expression of Hip, Gli1, Gli3 and PDGFRalpha was analyzed by in situ hybridization.
RESULTS: Expression of cytokeratin AE1/AE3 was observed in the cytoplasm of colorectal crypts. Members of the Hh signaling pathway were expressed in colorectal epithelium. Shh was expressed in cytoplasm of dysplastic epithelial cells, while expression of Ptch1, Hip and Gli1 were mainly detected in the malignant crypts of adenocarcinomas. In contrast, PDGFRalpha was expressed highly in aberrant crypts and moderately in the stroma. Expression of Gli3 could not be detected in colorectal adenocarcinomas.
CONCLUSION: These data suggest that Shh-Ptch1-Gli1 signaling pathway may play a role in the progression of colorectal tumor.
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