Abstract
Inhibins are dimeric glycoproteins composed of an alpha (α) subunit and one of two possible beta (β-) subunits (βA or βB). The aims of this study were to assess the frequency and tissue distribution patterns of the inhibin subunits in normal human endometrium. Samples from human endometrium from proliferative phase (PP; n=32), early secretory phase (ES; n=10) and late secretory phase (LS; n=12) were obtained. Immunohistochemistry, immunofluorescence and a statistical analysis were performed. All three inhibin subunits were expressed by normal endometrium by immunohistochemistry and immunofluorescence. Inhibin-α was primarily detected in glandular epithelial cells, while inhibin-β subunits were additionally localised in stromal tissue. Inhibin-α staining reaction increased significantly between PP and ES (P<0.05), PP and LS (P<0.01), and ES and LS (P<0.02). Inhibin-βA and -βB were significant higher in LS than PP (P<0.05) and LS than ES (P<0.05). All three inhibin subunits were expressed by human endometrium varying across the menstrual cycle. This suggests substantial functions in human implantation of inhibin-α subunit, while stromal expression of the β subunits could be important in the paracrine signalling for adequate endometrial maturation. The distinct expression in human endometrial tissue suggests a synthesis of inhibins into the lumen and a predominant secretion of activins into the stroma.
Similar content being viewed by others
References
Caniggia I, Lye SJ, Cross JC (1997) Activin is a local regulator of human cytotrophoblast cell differentiation. Endocrinology 138:3976–3986
Chabbert Buffet N, Djakoure C, Maitre SC, Bouchard P (1998) Regulation of the human menstrual cycle. Front Neuroendocrinol 19:151–186
Chong H, Pangas SA, Bernard DJ, Wang E, Gitch J, Chen W, Draper LB, Cox ET, Woodruff TK (2000) Structure and expression of a membrane component of the inhibin receptor system. Endocrinology 141:2600–2607
Dallenbach-Hellweg G, Poulsen H (1985) Atlas der Histopathologie des Endometriums. Springer Berlin, Heidelberg, New York
de Kretser DM, Hedger MP, Loveland KL, Phillips DJ (2002) Inhibins, activins and follistatin in reproduction. Hum Reprod Update 8:529–541
Fang J, Yin W, Smiley E, Wang SQ, Bonadio J (1996) Molecular cloning of the mouse activin beta E subunit gene. Biochem Biophys Res Commun 228:669–674
Fowler PA, Evans LW, Groome NP, Templeton A, Knight PG (1998) A longitudinal study of maternal serum inhibin-A, inhibin-B, activin-A, activin-AB, pro-alphaC and follistatin during pregnancy. Hum Reprod 13:3530–3536
Groome N, Lawrence M (1991) Preparation of monoclonal antibodies to the beta A subunit of ovarian inhibin using a synthetic peptide immunogen. Hybridoma 10:309–316
Groome N, Hancock J, Betteridge A, Lawrence M, Craven R (1990) Monoclonal and polyclonal antibodies reactive with the 1–32 amino terminal sequence of the alpha subunit of human 32 K inhibin. Hybridoma 9:31–42
Hötten G, Neidhardt H, Schneider C, Pohl J (1995) Cloning of a new member of the TGF-beta family: a putative new activin beta C chain. Biochem Biophys Res Commun 206:608–613
Jeschke U, Richter DU, Hammer A, Briese V, Friese K, Karsten U (2002) Expression of the Thomsen-Friedenreich antigen and of its putative carrier protein mucin 1 in the human placenta and in trophoblast cells in vitro. Histochem Cell Biol 117:219–226
Jones RL, Salamonsen LA, Critchley HO, Rogers PA, Affandi B, Findlay JK (2000) Inhibin and activin subunits are differentially expressed in endometrial cells and leukocytes during the menstrual cycle, in early pregnancy and in women using progestin-only contraception. Mol Hum Reprod 6:1107–1117
Jones RL, Salamonsen LA, Findlay JK (2002) Activin A promotes human endometrial stromal cell decidualization in vitro. J Clin Endocrinol Metab 87:4001–4004
Kalkhoven E, Roelen BA, de Winter JP, Mummery CL, van den Eijnden-van Raaij AJ, van der Saag PT, van der Burg B (1995) Resistance to transforming growth factor beta and activin due to reduced receptor expression in human breast tumor cell lines. Cell Growth Differ 6:1151–1161
Keelan JA, Zhou RL, Mitchell MD (2000) Activin A exerts both pro- and anti-inflammatory effects on human term gestational tissues. Placenta 21:38–43
Leung PH, Salamonsen LA, Findlay JK (1998) Immunolocalization of inhibin and activin subunits in human endometrium across the menstrual cycle. Hum Reprod 13:3469–3477
Lewis KA, Gray PC, Blount AL, MacConell LA, Wiater E, Bilezikjian LM, Vale W (2000) Betaglycan binds inhibin and can mediate functional antagonism of activin signalling. Nature 404:411–414
Li Q, Karam SM, Coerver KA, Matzuk MM, Gordon JI (1998) Stimulation of activin receptor II signaling pathways inhibits differentiation of multiple gastric epithelial lineages. Mol Endocrinol 12:181–192
Matzuk MM, Finegold MJ, Su JG, Hsueh AJ, Bradley A (1992) Alpha-inhibin is a tumour-suppressor gene with gonadal specificity in mice. Nature 360:313–319
McCarthy SA, Bicknell R (1993) Inhibition of vascular endothelial cell growth by activin-A. J Biol Chem 268:23066–23071
Munz B, Hubner G, Tretter Y, Alzheimer C, Werner S (1999) A novel role of activin in inflammation and repair. J Endocrinol 161:187–193
Mylonas I, Speer R, Makovitzky J, Richter DU, Briese V, Jeschke U, Friese K (2000) Immunohistochemical analysis of steroid receptors and glycodelin A (PP14) in isolated glandular epithelial cells of normal human endometrium. Histochem Cell Biol 114:405–411
Mylonas I, Jeschke U, Winkler L, Makovitzky J, Richter DU, Briese V, Friese K (2003a) Immunohistochemical expression of inhibin-alpha in human endometrium and the in vitro secretion of inhibin, estradiol and cortisol in cultured human endometrial glandular cells. Arch Gynecol Obstet 268:142–150
Mylonas I, Winkler L, Jeschke U, Briese V, Friese K (2003b) Investigations on isolation, purification and cultivation of human endometrial cells and on the in vitro inhibin expression in glandular epithelial cells. Zentralbl Gynakol 125:415–423
Mylonas I, Makovitzky J, Richter DU, Jeschke U, Briese V, Friese K (2004) Expression of the inhibin-alpha subunit in normal, hyperplastic and malignant endometrial tissue: an immunohistochemical analysis. Gynecol Oncol 93:92–97
Ni X, Luo S, Minegishi T, Peng C (2000) Activin A in JEG-3 cells: potential role as an autocrine regulator of steroidogenesis in humans. Biol Reprod 62:1224–1230
Oda S, Nishimatsu S, Murakami K, Ueno N (1995) Molecular cloning and functional analysis of a new activin beta subunit: a dorsal mesoderm-inducing activity in Xenopus. Biochem Biophys Res Commun 210:581–588
Otani T, Minami S, Kokawa K, Shikone T, Yamoto M, Nakano R (1998) Immunohistochemical localization of activin A in human endometrial tissues during the menstrual cycle and in early pregnancy. Obstet Gynecol 91:685–692
Petraglia F (1997) Inhibin, activin and follistatin in the human placenta: a new family of regulatory proteins. Placenta 18:3–8
Petraglia F, Florio P, Luisi S, Gallo R, Gadducci A, Vigano P, Di Blasio AM, Genazzani AR, Vale W (1998) Expression and secretion of inhibin and activin in normal and neoplastic uterine tissues. High levels of serum activin A in women with endometrial and cervical carcinoma. J Clin Endocrinol Metab 83:1194–1200
Remmele W, Stegner HE (1987) Vorschlag zur einheitlichen Definierung eines immunreaktiven Score (IRS) für den immunhistochemischen Östrogenrezeptornachweis (ER-ICA) im Mammakarzinomgewebe. Pathologe 8:138–140
Riley SC, Leask R, Balfour C, Brennand JE, Groome NP (2000) Production of inhibin forms by the fetal membranes, decidua, placenta and fetus at parturition. Hum Reprod 15:578–583
Risbridger GP, Schmitt JF, Robertson DM (2001) Activins and inhibins in endocrine and other tumors. Endocr Rev 22:836–858
Robertson DM, Hertan R, Farnworth PG (2000) Is the action of inhibin mediated via a unique receptor? Rev Reprod 5:131–135
Robinson GW, Hennighausen L (1997) Inhibins and activins regulate mammary epithelial cell differentiation through mesenchymal-epithelial interactions. Development 124:2701–2708
Smith JC, Price BM, Van Nimmen K, Huylebroeck D (1990) Identification of a potent Xenopus mesoderm-inducing factor as a homologue of activin A. Nature 345:729–731
Vale W, Rivier C, Hsueh A, Campen C, Meunier H, Bicsak T, Vaughan J, Corrigan A, Bardin W, Sawchenko P, et al (1988) Chemical and biological characterization of the inhibin family of protein hormones. Recent Prog Horm Res 44:1–34
Welt CK (2002) The physiology and pathophysiology of inhibin, activin and follistatin in female reproduction. Curr Opin Obstet Gynecol 14:317–323
Welt C, Sidis Y, Keutmann H, Schneyer A (2002) Activins, inhibins, and follistatins: from endocrinology to signaling. A paradigm for the new millennium. Exp Biol Med (Maywood) 227:724–752
Ying SY (1988) Inhibins, activins, and follistatins: gonadal proteins modulating the secretion of follicle-stimulating hormone. Endocr Rev 9:267–293
Acknowledgements
We would like to thank the nurses, medical doctors and laboratory staff for obtaining the endometrial material. This study was supported in part by the FöFoLe project of the Ludwig-Maximilians-University Munich for I. Mylonas.
Author information
Authors and Affiliations
Corresponding author
Additional information
I. Mylonas and U. Jeschke contributed equally to this work
Rights and permissions
About this article
Cite this article
Mylonas, I., Jeschke, U., Wiest, I. et al. Inhibin/activin subunits alpha, beta-A and beta-B are differentially expressed in normal human endometrium throughout the menstrual cycle. Histochem Cell Biol 122, 461–471 (2000). https://doi.org/10.1007/s00418-004-0709-6
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00418-004-0709-6