凡纳滨对虾miRNA-184克隆与表达分析Molecular Cloning and Expression Analysis of MicroRNA-184 in the White Shrimp(Litopenaeus vannamei)
梁金荣,许銮佳,李玲,郭慧,申玉春
摘要(Abstract):
【目的】研究凡纳滨对虾(Litopenaeus vannamei)miRNA-184 [microRNA-184(miR-184),记作LvmiR-184]在健康虾及染病虾中的表达,探讨其免疫功能。【方法】用茎环法克隆鉴定凡纳滨对虾LvmiR-184,通过荧光定量PCR检测LvmiR-184在对虾血淋巴、肝胰腺、鳃、肌肉、心脏、胃、肠和眼柄等8个组织中的分布。对凡纳滨对虾注射副溶血弧菌(Vibrio parahaemolyticus),检测LvmiR-184不同时间点的响应变化。对感染副溶血弧菌的凡纳滨对虾分别注射0.3、3.0和30.0 ng的mi R-184模拟物和抑制物,检测不同时间点对虾血细胞凋亡率。【结果与结论】LvmiR-184在所有组织中均有表达,在胃中表达量最高,其次是肌肉,鳃表达量最低。注射副溶血弧菌后1.5 h,LvmiR-184表达量显著上调;在24 h达到峰值,较对照组高8.25倍;对照组则维持在较低的水平。模拟物、抑制物注射量为30 ng时对虾血细胞凋亡率差异有统计学意义(P <0.05);与对照组凋亡率相比,注射模拟物6 h后提高62%。LvmiR-184可调控凡纳滨对虾的血细胞凋亡。
关键词(KeyWords): 凡纳滨对虾;microRNA;基因克隆;基因表达;细胞凋亡
基金项目(Foundation): 国家自然科学基金(31600321)
作者(Author): 梁金荣,许銮佳,李玲,郭慧,申玉春
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