title: Progesterone-regulated cyclic modulation of membrane metalloendopeptidase (enkephalinase) in human endometrium.
abstract: Membrane metalloendopeptidase (MMEP; EC 3.4.24.11; enkephalinase) catalyzes the degradation of endothelins, enkephalins, atrial natriuretic factor, substance P, and other small bioactive peptides. We found that MMEP is present in human endometrium, localized primarily in stromal cells of this tissue, and that the specific activity of MMEP (and immunoreactive MMEP protein) in endometrial tissue is correlated in a highly significant positive manner with the concentration of progesterone in plasma. In estrogen-treated, human endometrial stromal cells in monolayer culture, the specific activity of MMEP increases in response to treatment with progestin; and, this increase is accompanied by increases in immunoreactive MMEP protein, newly synthesized MMEP, and MMEP mRNA.
authors.affiliation: Cecil H. and Ida Green Center for Reproductive Biology Sciences, University of Texas Southwestern Medical Center, Dallas 75235.
authors.forename: M L
authors.initials: ML
authors.lastname: Casey
authors.forename: J W
authors.initials: JW
authors.lastname: Smith
authors.forename: K
authors.initials: K
authors.lastname: Nagai
authors.forename: L B
authors.initials: LB
authors.lastname: Hersh
authors.forename: P C
authors.initials: PC
authors.lastname: MacDonald
mesh_terms: D000328:Adult; D015152:Blotting, Northern; D002462:Cell Membrane / Q000201:enzymology; D002478:Cells, Cultured; D004717:Endometrium / Q000166:cytology / Q000201:enzymology* / Q000648:ultrastructure; D005260:Female; D006801:Humans; D015151:Immunoblotting; D007700:Kinetics; D008597:Menstrual Cycle; D008666:Metalloendopeptidases / Q000235:genetics / Q000378:metabolism*; D009928:Organ Specificity; D011247:Pregnancy; D011374:Progesterone / Q000097:blood / Q000502:physiology*; D012333:RNA, Messenger / Q000378:metabolism
chemical_list: D012333:RNA, Messenger; D011374:Progesterone; D008666:Metalloendopeptidases