File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Coordinated and cell-specific induction of both physiological plasminogen activators creates functionally redundant mechanisms for plasmin formation during ovulation

TitleCoordinated and cell-specific induction of both physiological plasminogen activators creates functionally redundant mechanisms for plasmin formation during ovulation
Authors
Issue Date1996
Citation
Endocrinology, 1996, v. 137, n. 12, p. 5671-5677 How to Cite?
AbstractSeveral lines of indirect evidence indicate that plasmin-mediated proteolysis plays a role in the breakdown of the follicle wall during ovulation. Consistent with this, the ovulation efficiency of mice lacking the two known physiological plasminogen activators (PAs), tissue-type PA (tPA) and urokinase-type PA (uPA), is reduced by 26%. Surprisingly, mice with a single deficiency of either tPA or uPA gene function were normal in their capacity to ovulate. In this study we used in situ hybridization and casein in situ zymography to localize the expression of messenger RNAs (mRNAs) encoding PAs and PA inhibitors and to examine the net PA activity in the mouse ovary at the time of ovulation. Although uPA mRNA expressed by granulosa cells is the most abundant and dramatically up-regulated PA before ovulation, a previously unnoticed coordinated induction of tPA mRNA was found in thecal-interstitial tissue. The existence of redundant mechanisms for plasmin production in the ovary may be the cause of the normal ovulation efficiency in single deficient mice lacking tPA or uPA. The expression of mRNAs for PA inhibitors, types 1 and 2, was low in the ovary, with minor inductions at restricted time points. In contrast, expression of protease nexin-1 (PN-1) by granulosa cells was high during the entire periovulatory period. Among subpopulations of granulosa cells, the expression of PN-1 and uPA was heterogeneous and complementary. Cumulus cells expressed high levels of PN-1 mRNA and low levels of uPA mRNA, thereby providing an inhibitory activity that may protect the mucified matrix of the cumulus oocyte complex from proteolytic degradation.
Persistent Identifierhttp://hdl.handle.net/10722/265449
ISSN
2023 Impact Factor: 3.8
2023 SCImago Journal Rankings: 1.285

 

DC FieldValueLanguage
dc.contributor.authorHägglund, Anna Carin-
dc.contributor.authorNy, Annelii-
dc.contributor.authorLiu, Kui-
dc.contributor.authorNy, Tor-
dc.date.accessioned2018-12-03T01:20:41Z-
dc.date.available2018-12-03T01:20:41Z-
dc.date.issued1996-
dc.identifier.citationEndocrinology, 1996, v. 137, n. 12, p. 5671-5677-
dc.identifier.issn0013-7227-
dc.identifier.urihttp://hdl.handle.net/10722/265449-
dc.description.abstractSeveral lines of indirect evidence indicate that plasmin-mediated proteolysis plays a role in the breakdown of the follicle wall during ovulation. Consistent with this, the ovulation efficiency of mice lacking the two known physiological plasminogen activators (PAs), tissue-type PA (tPA) and urokinase-type PA (uPA), is reduced by 26%. Surprisingly, mice with a single deficiency of either tPA or uPA gene function were normal in their capacity to ovulate. In this study we used in situ hybridization and casein in situ zymography to localize the expression of messenger RNAs (mRNAs) encoding PAs and PA inhibitors and to examine the net PA activity in the mouse ovary at the time of ovulation. Although uPA mRNA expressed by granulosa cells is the most abundant and dramatically up-regulated PA before ovulation, a previously unnoticed coordinated induction of tPA mRNA was found in thecal-interstitial tissue. The existence of redundant mechanisms for plasmin production in the ovary may be the cause of the normal ovulation efficiency in single deficient mice lacking tPA or uPA. The expression of mRNAs for PA inhibitors, types 1 and 2, was low in the ovary, with minor inductions at restricted time points. In contrast, expression of protease nexin-1 (PN-1) by granulosa cells was high during the entire periovulatory period. Among subpopulations of granulosa cells, the expression of PN-1 and uPA was heterogeneous and complementary. Cumulus cells expressed high levels of PN-1 mRNA and low levels of uPA mRNA, thereby providing an inhibitory activity that may protect the mucified matrix of the cumulus oocyte complex from proteolytic degradation.-
dc.languageeng-
dc.relation.ispartofEndocrinology-
dc.titleCoordinated and cell-specific induction of both physiological plasminogen activators creates functionally redundant mechanisms for plasmin formation during ovulation-
dc.typeArticle-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1210/endo.137.12.8940398-
dc.identifier.pmid8940398-
dc.identifier.scopuseid_2-s2.0-0030444633-
dc.identifier.volume137-
dc.identifier.issue12-
dc.identifier.spage5671-
dc.identifier.epage5677-
dc.identifier.issnl0013-7227-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats