Prolactin inhibits osteoclastic activity in the goldfish scale: A novel direct action of prolactin in teleosts

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概要

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• In teleosts, prolactin is involved in calcium regulation, but its role in scale/bone metabolism Is unclear. Using the in-vitro system with goldfish scales developed recently, we explored the effects of teleost prolactin, growth hormone, and somatolactin on osteoclasts and osteoblasts. Addition of prolactin at concentrations of 0.01-100 ng/ml reduced osteoclastic activity, partly via osteoclast apoptosis, after 6-18 h incubation. Conversely, growth hormone and somatolactin at a concentration of 100 ng/ml increased osteoclastic activity after 18 h incubation, indicating the specificity of the inhibitory effect of prolactin on osteoclastic activity. On the other hand, these three hormones promoted osteoblastic activity at concentrations of 10-100 ng/ml. The results from this study are the first demonstration of direct effects of prolactin on scale/bone metabolism and osteoclastic activity in a teleost. © 2008 Zoological Society of Japan.

• the Zoological Society of Japan = 日本動物学会の論文

著者

• SUZUKI Nobuo

  Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University

• Shimizu Nobuaki

  Institute Of Nature And Environmental Technology Kanazawa University

• Suzuki N

  Hokkaido Univ. Sapporo Jpn

• Suzuki N

  Noto Marine Laboratory Institute Of Nature And Environmental Technology Kanazawa University

• Suzuki N

  Noto Marine Laboratory Faculty Of Science Kanazawa University

• Shimizu Nobuyoshi

  Advanced Research Center For Genome Super Power Keio University

• Suzuki Nobuo

  Institute Of Nature And Environmental Technology Kanazawa University

• Takahashi Hideya

  Ushimado Marine Laboratory Faculty Of Science Okayama University

• Takahashi Hiroki

  Ushimado Marine Biological Station, Okayama Univeristy

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