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Korean Journal of Obstetrics & Gynecology 2001;44(6):1145-1149.
Published online June 1, 2001.
Expression of Transforming Growth Factor-1, 2 in the Decidua of the Early Pregnancy: Comparison of Decidua Basalis and Decidua Parietalis..
Jung Hye Hwang, Seung Hee Koh, Dong Ik Han, Sung Ro Chung, Moon Il Park, Youn Young Hwang, Se Jin Jang
Department of Obstetrics and Gynecology, Pathology, School of Medicine, Hanyang University, Seoul, Korea.
Implantation is a complex process between developing embryo and maternal endometrium, especially decidua. Decidua is a specialized endometrium during pregnancy and decidua basalis is the real implantation site infiltrated directly by trophoblast cells. The decidua parietalis lines the uterine cavity away from the implantation site, not real implantation site. TGF-beta1 and TGF-beta2 have known as multipotential cytokines and expression of TGF-beta1 and TGF-beta2 increased in decidua during pregnancy than secretory phase of endometrium. However, there is little known about their expression in decidua parietalis, compared with decidua basalis. The purpose of this study was to compare the expression of TGF-beta1 and TGF-beta2 in the decidua basalis and decidua parietalis during early pregnancy. METHODS: The early pregnant 26 samples were obtained at hysterectomy, which underwent surgery for cervical carcinoma, ovarian cancer, etc. Immunohistochemical staining of TGF-beta1 and TGF-beta2 was performed and staining intensity was semiquantified by using HSCORE. RESULTS: TGF-beta1 was slightly expressed in the decidua basalis and decidua parietalis and there were no differences among them. But the expressions of TGF-beta2 of stroma and glandular cells were higher in the decidua basalis than parietalis (p < 0.005). And the expressions of TGF-beta2 were stronger than that of TGF-beta1 in the both decidua of early pregnancy (p < 0.005). CONCLUSION: In decidua basalis, especially stromal cells, the expression of TGF-beta2 was increased than in the decidua parietalis. This suggests that TGF-beta2 may play an important role in decidua basalis that is directly invasion site by embryo and can be regulated by embryonic derived local factor. TGF-beta2, compared with TGF-beta1, was increased in both implantation site and suggest it may regulate implantation process during early pregnancy.
Key Words: TGF-beta1, beta2, Immnunohistochemical staining, Decidua basalis, Decidua parietalis

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