ラット精巣において、プロラクチンはプロタミン2mRNAの発現を誘導する
スポンサーリンク
概要
- 論文の詳細を見る
The effect of prolactin on transcription during spermatogenesis was examined by subtractive DNA hybridization and differential screening. A protamine 2 cDNA fragment was isolated from one of the genes up-regulated in testes of rat 6 h after prolactin injection. In situ hybridization to detect protamine 2 mRNA was also performed using digoxigenin-labeled cRNA probes. Weak signals were detected from preleptotene to early pachytene spermatocytes, elongated spermatids and spermatozoa; strong ones were recognized from mid- to late-pachytene, diplotene, and secondary spermatocytes, and early round spermatids. Localization of protamine 2 mRNA coincided with that of prolactin receptor mRNA described in our previous report. We then compared the time-dependent expression of protamine 2 mRNA with that of luteinizing hormone receptor mRNA after prolactin administration, using Northern blot analysis. Protamine 2 mRNA was up-regulated 1 h after the prolactin treatment, and stable levels were maintained for another 13 h. In contrast, luteinizing hormone receptor mRNA levels increased much later, at 13 h after prolactin injection. Therefore, protamine 2 gene responds rapidly to prolactin administration and up-regulation of expression appears to be independent of the luteinizing hormone pathway.
- 日本繁殖生物学会の論文
著者
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Kitamura Nobuo
Department of Cardiovascular Surgery, Kyoto Prefectural University of Medicine
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NAGAHAMA Yoshitaka
Laboratory of Reproductive Biology, National Institute for Basic Biology
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本道 栄一
Department of Veterinary Anatomy, Faculty of Agriculture, Yamaguchi University
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Yamada Junzo
Department Of Veterinary Anatomy Obihiro University Of Agriculture And Veterinary Medicine
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KUROHMARU Masamichi
Department of Veterinary Anatomy, Graduate School of Agricultural and Life Sciences, The University
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小林 亨
Laboratory of Reproductive Biology, National Institute of Basic Biology
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石黒 直隆
Department of Veterinary Public Health, Obihiro University of Agriculture and Veterinary Medicine, O
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