Development and Reproduction (한국발생생물학회지:발생과생식)

The Korean Society of Developmental Biology (한국발생생물학회)
권호 표지

KiSS1, KiSS2, GPR54 mRNA Expression of the Blacktip Grouper Epinephelus fasciatus

홍바리 Epinephelus fasciatus의 KiSS1, KiSS2, GPR54 mRNA 발현양상

  • Kang, Hyeong-Cheol (Marine and Environmental Research Institute of Jeju National University) ;
  • Lee, Chi-Hoon (Marine and Environmental Research Institute of Jeju National University) ;
  • Song, Young-Bo (Marine and Environmental Research Institute of Jeju National University) ;
  • Baek, Hea-Ja (Dept. of Marine Biology, Pukyong National University) ;
  • Kim, Hyung-Bae (Dept. of Marine Bio-resources, Gangwon Provincial University) ;
  • Lee, Young-Don (Marine and Environmental Research Institute of Jeju National University)
  • 강형철 (제주대학교 해양과환경연구소) ;
  • 이치훈 (제주대학교 해양과환경연구소) ;
  • 송영보 (제주대학교 해양과환경연구소) ;
  • 백혜자 (부경대학교 자원생물학과) ;
  • 김형배 (강원도립대학 해양생명과학과) ;
  • 이영돈 (제주대학교 해양과환경연구소)
  • Received : 2012.03.18
  • Accepted : 2012.06.10
  • Published : 2012.06.30
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Abstract

Kisspeptin has been reported to facilitate sexual maturation and ovulation by directly stimulating GnRH neurons via its receptor, GPR54. The KiSS-GPR54 system is playing an important role in the reproduction of several mammalian species. However, little is known about their function in fish. The aim of this study is to understand the physiological function and evolutionary conservation of KiSS-GPR54 system in teleost fish blacktip grouper, Epinephelus fasciatus. In the present study, we have partial cloned KiSS1, KiSS2 GPR54 mRNAs from a brain samples. Tissue distribution analysis using RT-PCR revealed that the KiSS1, KiSS2, GPR54 transcripts were expressed in different tissue. The KiSS-GPR54 system in gonadal of immature and mature stage were analyzed using qRT-PCR. The partial sequence of KiSS1, KiSS2, GPR54 were 232 bp, 304 bp, 613 bp long, respectively. KiSS1, KiSS2, GPR54 mRNAs are shown common expression in the brain. The amount of KiSS1, KiSS2 mRNAs expression were significantly higher in mature stage than immature stage. However GPR54 mRNA expression was higher in immature stage. These results are in good agreement with the hypothesis that KiSS-GPR54 system plays an important role in the regulation of reproductive function in the blacktip grouper.

최근 여러 포유류 종에서 Kisspeptin이 그 수용체인 GPR54와 함께 GnRH 분비를 자극하여 성 성숙과 최종배란에 영향을 미친다고 보고되고 있다. 이러한 보고들은 KiSS-GPR54 system이 번식과 밀접한 연관이 있음을 제시하고 있지만, 어류에 관한 연구는 미비한 실정이다. 이 연구는 어류에서의 KiSS-GPR54 system의 생리적 기능과 번식내분비적 기능을 탐색하기 위해 홍바리 Epinephelus fasciatus 뇌에서 KiSS1, KiSS2, GPR54 mRNA의 부분 염기서열을 클로닝 하였으며, KiSS1, KiSS2, GPR54 mRNA의 각 조직별 발현을 RT-PCR을 이용하여 확인하였다. 성 성숙과 KiSS-GPR54 system과의 연관성을 확인하기 위해 생식소 발달 상태(성숙과 미성숙)에 따른 발현을 qRT-PCR을 이용하여 분석하였다. KiSS1, KiSS2, GPR54의 부분 염기서열은 각각 232 bp, 304 bp, 613 bp 였으며, 조직별 발현을 조사한 결과 공통적으로 뇌에서 발현되었다. 생식소발달에 따른 발현 양상은 KiSS1, KiSS2 mRNA의 경우 성숙 상태에서가 미성숙 상태에 비해 유의적으로 높게 발현되었다. 하지만 GPR54 mRNA의 경우 미성숙 상태에서 더 높게 발현되었다. 이러한 결과들로 미루어 보아, KiSS-GPR54 system은 홍바리에 있어 번식과 밀접한 관련이 있을 것으로 사료된다.

Keywords

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