Expressions of p53 and Gadd45a Proteins in Human Pancreatic Cancer and Their Clinicopathological Significance

Dong Ming, Zhou Jian-ping, Kong Fan-min, Guo Ke-jian, Tian Yu-lin, Dong Yu-ting

Acta Academiae Medicinae Sinicae ›› 2005, Vol. 27 ›› Issue (5) : 628-627.

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Acta Academiae Medicinae Sinicae ›› 2005, Vol. 27 ›› Issue (5) : 628-627.
Original Articles

Expressions of p53 and Gadd45a Proteins in Human Pancreatic Cancer and Their Clinicopathological Significance

  • Dong Ming, Zhou Jian-ping, Kong Fan-min, Guo Ke-jian, Tian Yu-lin, Dong Yu-ting
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Abstract

Abstract: Objective To study the expressions of p53 and Gadd45a proteins and their clinico- pathological significance in human pancreatic cancer. Methods The expression of p53 and Gadd45a proteins was detected with immunohistochemistry in a series of 59 pancreatic cancers. Their relationships with the clinicopathological parameters including gender, tumor site, TNM stage, histological differentia- tion, and the prognosis of pancreatic cancer patients were analyzed. Results The positive expression rate of p53 protein was 67.8%(40/59)and that of Gadd45a protein was 42.4%(25/59). The positive expression rate of p53 protein is significantly higher in patients < 65 years than in patients ≥ 65 years(χ2 = 4.711, P = 0.030). Gadd45a expression was not correlated to the age of the patients. No significant difference was found between the expression of p53 proteins and histological differentiation and TNM stage of the tumors. Gadd45a expression was correlated with histological differentiation of panc- reatic cancer(χ2=10.052, P=0.007), but not with TNM stage of the tumors. No significant differences in the prognosis were found between the groups with and without p53 expression(χ2=0.09, P=0.764)and the groups with and without Gadd45a expression(χ2=0.14, P=0.704). Conclusions Both p53 and Gadd45a are highly expressed in human pancreatic cancer and may be associated with biological features of pancreatic cancer. Their expression alone or co-expression may be not helpful to evaluate the prognosis of patients with pancreatic cancer.

Key words

pancreatic cancer / p53 / cadd45a

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Dong Ming, Zhou Jian-ping, Kong Fan-min, Guo Ke-jian, Tian Yu-lin, Dong Yu-ting. Expressions of p53 and Gadd45a Proteins in Human Pancreatic Cancer and Their Clinicopathological Significance. Acta Academiae Medicinae Sinicae. 2005, 27(5): 628-627

References

1 董 明, 董雨亭. 胰腺癌发病危险因素的研究现状. 中华普通外科杂志, 2003, 18(6):405-406
2 Zhan Q. Gadd45a, a p53- and BRCA1-regulated stress protein, in cellular response to DNA damage. Mutat Res, 2005, 569(1-2):133-143
3 Ghaneh P, Kawesha A, Evans JD, et al. Molecular prognostic markers in pancreatic cancer. J Hepatobiliary Pancreat Surg, 2002, 9(1):1-11
4 Yamasawa K, Nio Y, Dong M, et al. Clinicopathological significances in Gadd45 expression and its relationship to p53 in human pancreatic cancer. Clin Cancer Res, 2002, 8(8):2563-2569
5 Melhem MF, Law JC, el-Ashmawy L, et al. Assessment of sensitivity and specificity of immunohistochemical stain- ing of p53 in lung and head and neck cancers. Am J Pathol, 1995, 146(6):1170-1177
6 SobinLH, Wittekind C. TNM Classification of malignant tumours. 5th ed. New York: John Wiley & Sons, 1997. 87-90
7 Dong M, Nio Y, Tamura K, et al. Ki-ras point mutation and p53 expression in human pancreatic cancer: a com- parative study among Chinese, Japanese, and Western pa- tients. Cancer Epidemiol Biomarkers Prev, 2000, 9(3):279-
8 284
9 Bergan A, Gladhaug IP, Schjolberg A, et al. p53 accu- mulation confers prognostic information in resectable adeno- carcinomas with ductal but not with intestinal differentia- tion in the pancreatic head. Int J Oncol, 2000,17(5):921-926
10 Nakamori S, Yashima K, Murakami Y, et al. Association of p53vgene mutations with short survival in pancreatic adenocarcinoma. Jnp J Cancer Res, 1995, 86(2):174-181
11 Dong M, Ma G, Tu W, et al. The clinicopathological significance of p53 and MDM2 protein expression in human pancreatic cancer. World J Gastroenterol, 2005, 11(14):2162-2165
12 Hildesheim J, Belova GI, Tyner SD, et al. Gadd45a regulates matrix metalloproteinases by suppressing Delta Np63 alpha and beta-catenin via p38 MAP kinase and APC complex activation. Oncogene,2004, 23(10):1829-1837
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