|
|
||||||||
a Institut National de la Santé et de la Recherche Médicale, Unité 361, Université René-Descartes, Pavillon Baudelocque, 75014 Paris, France
The role of protein kinase C (PKC) in the contraction of human myometrium induced by endothelin-1 was investigated. The PKC inhibitor, calphostin C, reduced the sustained phase of endothelin-1-induced contraction. The expression and subcellular distribution of PKC isoforms were determined in unstimulated myometrium by Western blotting using isoform-specific antisera. At least five PKC isoforms (PKC
, PKCß1, PKCß2, PKC
, and trace amounts of PKC
) were detected. Quantitative immunoblotting revealed that all these isoforms were diversely distributed between the cytosolic and particulate fractions. After stimulation with phorbol 12,13-dibutyrate (PDB) and endothelin-1, differential redistribution occurred, suggesting a selective role of these isoforms in the physiological function of the myometrium. Biochemical assay confirmed that PDB as well as endothelin-1 evoked a decrease in cytosolic PKC activity. Taken together, these results suggest that PKC may play a role in endothelin-1-induced contraction of human uterine smooth muscle.
2 Correspondence: M. Breuiller-Fouché, INSERM U. 361, Pavillon Baudelocque, 123, Bd de Port-Royal, 75014 Paris, France. FAX: 00.1.43.26.44.08; u361{at}cochin.inserm.fr
This article has been cited by other articles:
![]() |
K. Yasuda, T. Nakamoto, M. Yasuhara, H. Okada, T. Nakajima, H. Kanzaki, M. Hori, and H. Ozaki Role of protein kinase C{beta} in rhythmic contractions of human pregnant myometrium Reproduction, April 1, 2007; 133(4): 797 - 806. [Abstract] [Full Text] [PDF] |
||||
![]() |
I. Eude, B. Paris, D. Cabrol, F. Ferré, and M. Breuiller-Fouché Selective Protein Kinase C Isoforms Are Involved in Endothelin-1-Induced Human Uterine Contraction at the End of Pregnancy Biol Reprod, November 1, 2000; 63(5): 1567 - 1573. [Abstract] [Full Text] |
||||
![]() |
C. Tertrin-Clary, I. Eude, T. Fournier, B. Paris, M. Breuiller-Fouche, and F. Ferre Contribution of protein kinase C to ET-1-induced proliferation in human myometrial cells Am J Physiol Endocrinol Metab, March 1, 1999; 276(3): E503 - E511. [Abstract] [Full Text] [PDF] |
||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |