PRACTICAL ONCOLOGY JOURNAL ›› 2014, Vol. 28 ›› Issue (6): 485-491.doi: 10.11904/j.issn.1002-3070.2014.06.002

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The research on expression of cell cycle and apoptosis related protein in keratoacanthoma and well-differentiated squamous cell carcinoma

LIU Bingmei1,YANG Jing1,ZHANG Hanwen1,XING Ronggui1,LI Lili2,ZHAO Liping1,QIAO Shi1,YOU Haiyan1   

  1. 1.Department of Dermatology,Heilongjiang Province Hospital,Harbin 150001,China;
    2.Department of Dermatology,The First Hospital of Qiqihaer
  • Received:2014-10-26 Online:2014-12-28 Published:2015-01-08

Abstract:

Objective To explore the expressions and significances of p53、bcl-2、Ki-67 and apoptosis in keratoacanthoma(KA)and well differentiated squamous cell carcinoma(WDSCC).Methods The expressions of p53、bcl-2、Ki-67 were detected by immunohistochemical technique in 44 cases of KA and 20 cases of WDSCC.Apoptosis was identified by using terminal deoxynucleotidyl transfers(TdT)-mediated dUTP-biotin nick and labelling(TUNEL)method.Results The positive expressive rates of p53 in proliferative、mature and regressive of KA were 22.23%、26.18% and 6.52%,which was lower than the positive rate of WDSCC(41.82%).Significant differences were found between every period of KA with WDSCC in p53 expression;The intensity of expression and pattern were similar in KA of Ki-67 and p53.There were a positive correlation between p53 and Ki-67 expression rate(r=0.986,P<0.001).The bcl-2 staining showed weak expression in 1 case in WDSCC and 2 cases in KA,but only a few positive tumor cells was limited to basal cell layer in KA.The average apoptosis rate in KA was 21.72%,which was apparently higher than in WDSCC(9.925%).There were a negative correlation between the apoptosis rate and proliferation rate of Ki-67(r=-0.824,P<0.001).Conclusion The proliferation and apoptosis in KA can coexist.However,the apoptosis will occupy a dominance position in regressive phase,which results in the regression of tumor.The expressions of p53、Ki-67 and apoptosis would be a certain significance in differentiated KA and WDSCC.

Key words: Keratoacanthoma, Squamous cell carcinoma, p53, bcl-2, Ki-67

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