Journal of Perinatal Medicine
Official Journal of the World Association of Perinatal Medicine
Editor-in-Chief: Dudenhausen, Joachim W.
Editorial Board Member: / Bancalari, Eduardo / Greenough, Anne / Genc, Mehmet R. / Chervenak, Frank A. / Chappelle, Joseph / Bergmann, Renate L. / Bernardes, J.F. / Bevilacqua, G. / Blickstein, Isaac / Cabero Roura, Luis / Carbonell-Estrany, Xavier / Carrera, Jose M. / D`Addario, Vincenzo / D'Alton, MD, Mary E. / Dimitrou, G. / Grunebaum, Amos / Hentschel, Roland / Köpcke, W. / Kawabata, Ichiro / Keirse, M.J.M.C. / Kurjak M.D., Asim / Lee, Ben H. / Levene, Malcolm / Lockwood, Charles J. / Marsal, Karel / Makatsariya, Alexander / Nishida, Hiroshi / Ogata, Edward / Papp, Zoltán / Pejaver, Ranjan Kumar / Pooh, Ritsuko K. / Romero, Roberto / Saugstad, Ola D. / Schenker, Joseph G. / Sen, Cihat / Seri, Istvan / Vetter, Klaus / Winn, Hung N. / Young, Bruce K. / Zimmermann, Roland
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Expression changes of sex hormone binding globulin in GDM placental tissues
1Department of Obstetrics and Gynecology, Shengjing Hospital Affiliated to China Medical University, 36 Sanhao Street, Heping District, Shenyang, China
2Liaoning Provincial Key Laboratory of Endocrine Diseases, Shenyang, China
Citation Information: Journal of Perinatal Medicine. Volume 40, Issue 2, Pages 129–135, ISSN (Online) 1619-3997, ISSN (Print) 0300-5577, DOI: 10.1515/jpm.2011.128, November 2011
- Published Online:
Objective: To compare the expression of sex hormone binding globulin (SHBG) in normal placental tissues with placental tissues from patients with gestational diabetes mellitus (GDM) and to deduce the mechanism affecting placental SHBG in GDM.
Methods: We detected SHBG localization and measured SHBG mRNA and protein using immunohistochemistry, reverse-transcription polymerase chain reaction, and Western blotting, respectively, in normal and GDM placental tissues. The distribution of SHBG in placental cells was examined using immune electron microscopy.
Results : Compared to controls, placental tissues from patients in the GDM group displayed disordered cell surface microvilli that were decreased in quantity, swollen, and had narrowed and broken gap junctions. Intracellular abnormalities included expanded rough endoplasmic reticula, swollen mitochondria, and irregular nuclear morphologies with non-uniform chromatin. SHBG localized primarily to trophoblast cell membranes and cytoplasm. SHBG was strongly expressed on the microvilli side and weakly expressed on the basement membrane with uneven staining. SHBG also was expressed in villous stromal cells and vascular endothelial cells. Compared to the controls, placental tissues from the GDM group displayed significantly decreased immunostaining rates for SHBG, as well as significantly lower levels of SHBG mRNA and protein expression (P<0.05).
Conclusion: SHBG was detected in placental trophoblast cells from patients with GDM, and the synthesis and secretion of SHBG were reduced when trophoblast cells were irregular. A decrease in SHBG could affect placental function or aggravate GDM. Our results suggest that placental SHBG plays an important role in the pathogenesis of GDM.
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