title: The significance of membrane type 1 metalloproteinase in structural involution of human corpora lutea.
abstract: The expression of membrane type 1 (MT1) matrix metalloproteinase (MMP), MMP-2, and tissue inhibitors of MMP-1 and -2 during structural involution of the human corpus luteum was examined using immunohistochemistry, Northern blotting, Western blotting, gelatin zymography and in-situ hybridization techniques. The corpora lutea of 20 patients were investigated at the time of total hysterectomy and were obtained from five patients each in the early, mid- and late luteal phases and during gestation. Immunohistochemistry for MT1-MMP in corpus luteum showed that the protein appeared in granulosa lutein cells in the late luteal phase. Both the expression of MT1-MMP mRNA and the amount of the protein increased in the late luteal phase. In-situ hybridization showed that MT1-MMP mRNA was localized mainly in the cytoplasm of granulosa lutein cells. These results suggest that increased expression of MT1-MMP may be a major factor in remodelling of the human corpus luteum during structural luteolysis.
authors.affiliation: Department of Obstetrics and Gynecology, Cancer Research Institute, Sapporo Medical University School of Medicine, South-1 West-16 Chuo-ku, Japan.
authors.forename: Kengo
authors.initials: K
authors.lastname: Manase
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Endo
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Henmi
authors.forename: Yoshimitu
authors.initials: Y
authors.lastname: Kitajima
authors.forename: Kiyohiro
authors.initials: K
authors.lastname: Yamazaki
authors.forename: Akira
authors.initials: A
authors.lastname: Nishikawa
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Mitaka
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sato
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Kudo
mesh_terms: D003338:Corpus Luteum / Q000254:growth & development / Q000502:physiology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D020778:Matrix Metalloproteinase 2 / Q000378:metabolism; D053504:Matrix Metalloproteinases, Membrane-Associated; D008666:Metalloendopeptidases / Q000502:physiology*; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000378:metabolism; D019716:Tissue Inhibitor of Metalloproteinase-2 / Q000378:metabolism
chemical_list: D019715:Tissue Inhibitor of Metalloproteinase-1; D019716:Tissue Inhibitor of Metalloproteinase-2; D053504:Matrix Metalloproteinases, Membrane-Associated; D008666:Metalloendopeptidases; D020778:Matrix Metalloproteinase 2