【摘 要】
：
[目的]研究NKCC1a基因在急性盐度胁迫下对黄鳍棘鲷(Acanthopagrus latus)的渗透压调控机理.[方法]用生物信息学软件分析NKCC1a的序列特征,用实时荧光定量PCR(qRT-PCR)技术检测其在黄鳍棘鲷各组织内的表达情况及其在盐度0、8、16、24(对照)和32条件下的表达模式.[结果]NKCC1a开放阅读框(ORF)大小为3435 bp,共编码1144个氨基酸,存在一个经典的Na+-K+-Cl-协同转运蛋白SLC12A结构域,且在不同物种中有高保守性.NKCC1a在13个组织中均有
【机 构】
：
中国水产科学研究院南海水产研究所 / 农业部南海渔业资源开发利用重点实验室,广东 广州 510300;中国农业科学院研究生院,北京 100089;中国水产科学研究院南海水产研究所 / 农业部南海渔业资
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[目的]研究NKCC1a基因在急性盐度胁迫下对黄鳍棘鲷(Acanthopagrus latus)的渗透压调控机理.[方法]用生物信息学软件分析NKCC1a的序列特征,用实时荧光定量PCR(qRT-PCR)技术检测其在黄鳍棘鲷各组织内的表达情况及其在盐度0、8、16、24(对照)和32条件下的表达模式.[结果]NKCC1a开放阅读框(ORF)大小为3435 bp,共编码1144个氨基酸,存在一个经典的Na+-K+-Cl-协同转运蛋白SLC12A结构域,且在不同物种中有高保守性.NKCC1a在13个组织中均有表达,在脑中表达量最高,显著高于其他组织(P<0.05);其次为鳃,在性腺和肝脏中表达量则显著低于其他组织(P<0.05).盐度胁迫6 h时,在淡水组(盐度0)中NKCC1a表达量显著上升(P<0.05);在盐度为8和16处理组中,NKCC1a表达量先降低后逐渐升高,随后趋于平稳;在盐度32处理组,表达量呈先升高后降低最后又升高趋势,在24 h时最大.[结论]NKCC1a基因在黄鳍棘鲷盐度适应中发挥重要作用.
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