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2010, Volume 26, Number 1, Page(s) 031-037     
[ Abstract (Turkish) ] [ Full Text ] [ PDF ] [ Similar Articles ]
DOI: 10.5146/tjpath.2010.00992
Expression of Ki-67, Bcl-2 and Bax in the First Trimester Abortion Materials
Canan KELTEN1, Osman ZEKİOĞLU2, Coşan TEREK3, Necmettin ÖZDEMİR2, Ender DÜZCAN1
1Department of Pathology, Pamukkale University, Faculty of Medicine, DENIZLI, TURKEY
2Ege University, Faculty of Medicine, IZMIR TURKEY
3Department of Gynecology and Obstetrics, Ege University, Faculty of Medicine, IZMIR, TURKEY
Keywords: Abortion, Cell proliferation, Apoptosis, Ki-67, Bcl-2, Bax

Objective: The aim of this study was to investigate possible similar or different mechanisms in recurrent and spontaneous abortion by evaluating immunohistochemical correlation between proliferation marker Ki-67, and apoptosis markers Bcl-2 and Bax in the fetal trophoblasts and maternal deciduas from abortion material.

Material and Method: Eighty samples of curettage materials from 65 abortion patients histopathologically diagnosed “decidua showing Arias-Stella reaction and chorionic villi” or only “decidua showing Arias-Stella reaction” were included in the study. Hematoxylin&Eosin stained sections from all cases were re-evaluated and further stained immunohistochemically using antibodies against Ki-67, Bcl-2 and Bax.

Results: Proliferation rate evaluated by Ki-67 expression both in the cytotrophoblastic cells and decidua was found to be significantly lower in spontaneous and recurrent abortions compared to evacuation abortion. The extent of Bcl-2 expression in syncytiotrophoblastic cells covering villous stroma was also decreased in spontaneous abortion. There were no significant differences between spontaneous and recurrent abortions in terms of Bcl-2 expression in syncytiotrophoblasts and Ki-67 proliferation index in cytotrophoblastic cells or decidua. Bax staining showed minimal decidual expression in a few spontaneous and recurrent abortions.

Conclusion: We concluded that proliferation rate was decreased in fetal villous cytotrophoblasts and maternal deciduas in spontaneous and recurrent abortions. We also proposed that loss of Bcl-2 expression in syncytiotrophoblasts may cause abortion in a subset of cases. However, the data from spontaneous and recurrent abortions did not not support the presence of different mechanisms in both groups.

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