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KMID : 0357920020360060382
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Korean Journal of Pathology
2002 Volume.36 No. 6 p.382 ~ p.388
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Altered Expression of p53, p21WAF1, p16, Rb, Smad4 and c-erbB-2 in Resected Pancreatic Ductal Adenocarcinoma
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Kang Yun-Kyung
Kim Woo-Ho
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Abstract
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Background: Our aim was to undertake a comprehensive analysis of the expression of key molecular markers in a series of pancreatic ductal adenocarcinomas and to determine their association with clinicopathologic variables.
Methods: By using immunohistochemical staining, we examined the expressions of five tumor suppressor genes (p53, p21WAF1, p16, Rb, Smad4) and a growth factor receptor (c-erbB-2) in 52 surgically resected pancreatic ductal adenocarcinomas.
Results: Abnormal nuclear overexpression of p53 was noted in 28/52 (53.8%) cases. Total loss of p21WAF1, p16, Rb, and Smad4 was detected in 15/52 (28.8%), 33/52 (63.5%), 4/52 (7.7%), and 26/52 (50%) cases, respectively. Overexpression of c-erbB-2 was noted in 21/52 (40.4%) cases. Forty-nine (94.2%) cases revealed aberration of at least one of the markers examined. There was a positive correlation between p53 and c-erbB-2 overexpression (p<0.05). Among the examined genes, overexpression of c-erbB-2 was found to have a positive relationship with the tumor stage (p<0.05). There was also a significant correlation between the histologic grade and the number of abnormally expressed genes per tumor (p<0.05).
Conclusion: Among the various tumor-associated proteins evaluated in this study, c-erbB-2 could have the most likely clinical implication.
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KEYWORD
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Carcinoma, Pancreatic Ductal-GenesTumor suppressor-Receptor, erbB-2, Immunohistochemistry
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