Angiotensin II Secretion by the Bovine Oviduct is Stimulated by Luteinizing Hormone and Ovarian Steroids
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概要
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Angiotensin II (Ang II), a vasoactive peptide, is secreted by the bovine oviduct and is involved in modulation of local oviductal contraction. Ang II biosynthesis and release during the normal estrous cycle and the effects of luteinizing hormone (LH) and ovarian steroids on biosynthesis and secretion of Ang II were investigated. During the preovulatory period, increases in mRNA expression for Angiotensin converting enzyme 1 (ACE-1) and release of Ang II peptide were detected. Microdialysis of oviductal segments in vitro showed that LH alone significantly increased Ang II release, and combined infusion of LH+E2+P4 caused an increase in Ang II release. In cultured oviductal epithelial cells, LH increased Ang II release and ACE-1 mRNA expression, and E2+P4 enhanced stimulatory effect of LH on Ang II release and ACE-1 mRNA expression. Thus, it can be concluded that the oviductal Ang II system is upregulated by LH and ovarian steroids during the periovulatory period and may enhance local oviductal contraction. These events could stimulate transport of gametes to the fertilization site.
- 2009-10-01
著者
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Miyamoto Akio
Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture & Veterinary Medicine
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Miyamoto Akio
Graduate School Of Animal And Food Hygiene Obihiro University Of Agriculture And Veterinary Medicine
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De Silva
Department of Civil Engineering, The University of Tokyo
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WIJAYAGUNAWARDANE Missaka
Department of Animal Science, University of Peradeniya
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Wijayagunawardane Missaka
Department Of Animal Science University Of Peradeniya
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De Silva
Department Of Botany Faculty Of Science University Of Ruhuna
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KODITHUWAKKU Suranga
Department of Animal Science, University of Peradeniya
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Kodithuwakku Suranga
Department Of Animal Science University Of Peradeniya
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Miyamoto Akio
Graduate School Of Animal And Food Hygiene Obihiro Univ. Of Agriculture And Veterinary Medicine
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De Silva
Department Of Animal Science University Of Peradeniya
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