Possible roles of intracellular cyclic AMP, protein kinase C and calcium ion in the apoptotic signaling pathway in bovine luteal cells

Yuko Tatsukawa, Anom Bowolaksono, Ryo Nishimura, Junichi Komiyama, Tomas J. Acosta, Kiyoshi Okuda

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Structural luteolysis occurs by apoptosis of luteal cells. The present study examined the effects of activators of well-characterized second messengers on Fas and caspase-3 mRNA expression and on P4 production in luteal cells in order to trace the pro- and anti-apoptotic factors in the bovine corpus luteum (CL). Cultured bovine mid luteal cells were treated for 24 h with a cyclic AMP analogue (8-bromo cyclic AMP; 8br-cAMP; 2.5 mM), a protein kinase C (PKC) activator (phorbol 12-myristate 13-acetate; PMA; 10 μM), or calcium ionophore (A23187; 10 μM). Fas and caspase-3 mRNA expression was inhibited by 8br-cAMP and PMA but was increased by A23187 (P<0.05). In addition, P4 production by bovine luteal cells was stimulated by 8br-cAMP and PMA, whereas it was inhibited by A23187, compared with untreated controls (P<0.05). The overall results suggest that cAMP and PKC suppress apoptosis in bovine luteal cells through inhibition of Fas and caspase-3 mRNA expression and through stimulation of P4 production. Therefore, substances that activate cAMP or PKC may act as survival factors in the bovine CL. Furthermore, substances that mobilize Ca2+ may act as apoptotic factors by stimulating Fas and caspase-3 expression in the bovine luteal cells.

Original languageEnglish
Pages (from-to)517-522
Number of pages6
JournalJournal of Reproduction and Development
Volume52
Issue number4
DOIs
Publication statusPublished - Sep 20 2006

Keywords

  • Anti-apoptotic factor
  • Apoptosis
  • Corpus luteum
  • Cow
  • Second messenger

ASJC Scopus subject areas

  • Animal Science and Zoology

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