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염분과 수온 스트레스에 따른 감성돔의 glucocorticoid receptor mRNA 발현 특징과 생리적 변화에 관한 연구
Profiles of Glucocorticoid Receptor mRNA Expression and Physiological Changes in Response to Osmotic and Thermal Stress Conditions in Black Porgy (Acanthopagrus schlegeli) 원문보기

Korean journal of Ichthyology = 한국어류학회지, v.22 no.1, 2010년, pp.17 - 24  

안광운 (한국해양대학교 해양환경.생명과학부) ,  신현숙 (한국해양대학교 해양환경.생명과학부) ,  민병화 (국립수산과학원 육종연구센터) ,  길경석 (한국해양대학교 전기전자공학부) ,  최철영 (한국해양대학교 해양환경.생명과학부)

초록
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본 연구에서는 감성돔의 염분과 수온 변화에 따른 스트레스 반응을 알아보기 위하여 glucocorticoid receptor (GR) mRNA 발현을 조사하였다. 감성돔 신장으로부터 전장의 GR cDNA를 클로닝하였고, 염분과 수온이 변화하는 동안 아가미, 신장 및 장에서 GR mRNA 발현 변화를 quantitative real-time PCR (QPCR)을 이용하여 조사하였다. 염분 변화시, 아가미, 신장 및 장에서 GR mRNA 발현은 0 psu에서 가장 높게 나타났으며, 혈장 cortisol과 glucose 농도도 증가한 반면, triiodothyronine ($T_3$) 농도는 감소하였다. 수온 변화시, 아가미, 신장 및 장에서 GR mRNA 발현은 $30^{\circ}C$에서 가장 높게 관찰되었다. 혈장 cortisol, glucose 및 $T_3$ 농도 또한 고수온 ($30^{\circ}C$)에서 증가하였다. GR mRNA 발현의 증가는 염분과 수온 변화와 같은 환경 요인에 대한 좋은 스트레스 지표로 여겨진다.

Abstract AI-Helper 아이콘AI-Helper

The present study investigated the expression of glucocorticoid receptor (GR) mRNA as a stress response during salinity changes (35, 10, and 0 psu) and water temperature changes (from $20^{\circ}C$ to $30^{\circ}C$, $1^{\circ}C$/day) in black porgy. We cloned the ful...

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AI 본문요약
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제안 방법

  • In this study, we cloned the full-length G푼 cDNA from the kidney of black porgy and investigated the expression pattern of GR mRNA in various tissues (gills, kidney, and intestine) after transfer to a hypoosmotic environment as well as an environment with a high water temperature. In addition, we examined the extent of stress due to changes in osmotic and temperature conditions by analyzing plasma parameters.
  • The primers for QPCR were designed based on known sequences of black porgy GR: GR forward primer (5'・CGT TGA TGC AGC CAG GAC AGG-37), GR reverse primer (5Z-GGA ACT GCT GCT GAA CCC TCT G・3‘), p-actin forward primer (5Z-TCG AGC ACG GTA TTG TGA CC-3Z), and P-actin reverse primer (5Z-ACG GAA CCT CTC ATT GCC GA-3'). PCR amplification was performed using an iCycler iQ Multicolor Real-Time PCR Detection System (Bio-Rad, Hercules, CA) and iQ™ SYBR Green Supermix (Bio-Rad) according to the manufacturer's instructions. The QPCR conditions were 1 cycle of denaturation at 95℃ for 5 min, 35 cycles of denaturation at 95℃ for 20 s, annealing at 55℃ for 20 s, and extension at 70℃ for 20 s.
  • changes and water temperature rise. The primers for QPCR were designed based on known sequences of black porgy GR: GR forward primer (5'・CGT TGA TGC AGC CAG GAC AGG-37), GR reverse primer (5Z-GGA ACT GCT GCT GAA CCC TCT G・3‘), p-actin forward primer (5Z-TCG AGC ACG GTA TTG TGA CC-3Z), and P-actin reverse primer (5Z-ACG GAA CCT CTC ATT GCC GA-3'). PCR amplification was performed using an iCycler iQ Multicolor Real-Time PCR Detection System (Bio-Rad, Hercules, CA) and iQ™ SYBR Green Supermix (Bio-Rad) according to the manufacturer's instructions.
  • a TRIzol kit (Gibco/BRL). Using 2.5 Jig of total RNA as a template, 3Z-RACE cDNA and 5Z-RACE cDNA were synthesized using a CapFishing™ full-length cDNA Premix Kit (Seegene, Seoul, Korea). First-strand cDNA synthesis was conducted using an oligo-d (T)i8 anchor primer (5Z-CTG TGA ATG CTG CGA CTA CGA T(T)i8-3') and CapFishing™ adaptor (Seegene).

대상 데이터

  • The primers used for GR amplification were designed using highly conserved regions of gilthead seabream (Sparus aurata, GenBank accession no. DQ486890) and European seabass (Dicentrarchus labrax, AY619996): GR forward primer (5Z-CTG TTT CTC ATG TCT TTC GG-3') and GR reverse primer (5Z-TTT CGG TAA TTG GTT GCT GAT GAT-3, ). Total RNA was extracted from the black porgy kidney using a TRIzol kit (Gibco/BRL, Grand Island, NY).
  • Comparison of the amino acid sequence of black porgy GR, gilthead sea bream (gsGR) GR, European sea bass (esGR) GR, and African cichlid (acGR) GR optimally aligned to match identical residues indicated by the shaded boxes. The sequences were taken from the GenBank/EMBL/DDBJ sequence databases, The GR amino acid sequences used for alignment are black porgy GR (bpGR, GenBank accession no. A AX 18925), gilthead sea bream GR (gsGR, ABF30967), European sea bass GR (esGR, AAT-41627), and African cichlid GR(acGR, AAM27887). The DNA-binding domain is indicated by an asterisk and the hormone-binding domain is boxed.
  • The study was performed with 1-year-old black porgy (R=60, 14.3±0.4cm, 51.0±6.0g) reared in 220-L circulating filter tanks in the laboratory. Before the experiment, water temperature and photoperiod were 20± 1℃ and 12L:12D, respectively.

데이터처리

  • , Chicago, IL). Differences in the data were compared by one-way ANOVA followed by post hoc multiple comparison test (Tukey's test).
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