Asian-Australasian Journal of Animal Sciences

  • 제15권8호
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  • Pages.1091-1097
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  • 2002
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  • 1011-2367(pISSN)
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  • 1976-5517(eISSN)
아세아태평양축산학회 (Asian Australasian Association of Animal Production Societies)
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Role of Diacyl Glycerol (DAG) in Caprine Sperm Acrosomal Exocytosis Induced by Progesterone

  • Somanath, P.R. (Animal Biochemistry Division, National Dairy Research Institute) ;
  • Gandhi, K.K. (Animal Biochemistry Division, National Dairy Research Institute)
  • 투고 : 2001.11.07
  • 심사 : 2002.02.15
  • 발행 : 2002.08.01
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초록

Capacitated goat spermatozoa generated diacyl glycerol (DAG) when suspended in Krebs-Ringer bicarbonate medium and induced by progesterone or $Ca^{2+}$ ionophore A23187. We have added Sn-1-oleoyl-2-acetyl glycerol externally, to study the effect of DAG in goat sperm acrosomal exocytosis. Addition of neomycin abolished the DAG generating capacity of progesterone in a dose dependent manner, suggesting the involvement of a phosphoinositidase C activated phospholipase C system in the process. The level of increase in phosphatidic acid was considerably low and was produced well after the DAG generation thereby suggesting the involvement of a DAG kinase which phosphorylates DAG to produce PA. The inhibition of progesterone mediated effect by inhibitors of $GABA_A/Cl^{-}$ channel and $Ca^{2+}$ channels further supports the evidence that the events of binding of agonist to the receptor(s), opening of $Ca^{2+}$ channels and the activation of phospholipase C are reconciled to perform the function of acrosome reaction in capacitated goat spermatozoa.

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참고문헌

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