翘嘴鳜学习记忆相关基因c-fos对食欲基因的调控
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梁慧(1995–),女,硕士研究生,研究方向为鱼类营养与生理.E-mail:huiliang_1995@163.com

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S961

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国家自然科学基金面上项目(31772822); 水产增养殖安徽省重点实验室开放课题项目(AHSC202002).


The effect of learning pathway genes on acquiring novel feeding behaviors in Chinese perch, Siniperca chuatsi
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    摘要:

    学习记忆在动物获得新的觅食技巧和食物偏好方面扮演着重要的角色。为评估学习记忆对翘嘴鳜(Siniperca chuatsi)摄食调控的影响, 构建翘嘴鳜学习记忆相关基因 c-fos 及 zif268 荧光过表达载体, 并以 pcDNA3.1-EGFP 载体质粒中的绿色荧光蛋白基因为报道基因进行电转实验, 优化电压、脉冲时间、质粒浓度和电击次数等电转条件, 确立最佳条件。利用电击的方式转染翘嘴鳜脑细胞, 检测食欲基因 mch、agrp、pomc、npy 表达变化。结果显示, 成功构建了学习记忆过表达载体 pcDNA3.1-c-fos-EGFP、pcDNA3.1-zif268-EGFP。翘嘴鳜脑细胞电转染的最适条件: 细胞密度 1×106 /mL、电压 240 V、脉冲时间 5 ms、质粒 6 μg、电击 1 次、转染 48 h, 可见大部分荧光蛋白表达, 转染率较高, 表明 pcDNA3.1-EGFP 在体外成功转染翘嘴鳜脑细胞。过表达 c-fos 基因后, 食欲相关基因 pomc 和 npy mRNA 水平均显著上升。而过表达 zif268 基因后, 并未发现食欲基因有差异表达。以上结果说明, 翘嘴鳜学习记忆相关基因 c-fos 的表达影响了食欲相关基因 pomc 和 npy 的表达。

    Abstract:

    Learning and memory play important roles in species obtaining new foraging skills and food preferences. In order to study the influence of learning and memory pathways on the regulation of feeding in Chinese perch Siniperca chuatsi, an overexpression vector of learning and memory related genes c-fos and zif268 was constructed, and pcDNA3.1- EGFP was chosen as the reporter plasmid and transferred into Chinese perch brain cells by electroporation. The optimal electroporation conditions were determined by testing the transfection efficiency with different voltages, plasmid amounts, transfection times, and numbers of shocks. The results showed that learning and memory overexpression vector pcDNA3.1-c-fos-EGFP, pcDNA3.1-zif268-EGFP was successfully constructed. The maximum electroporation efficiency was achieved under the following conditions: in a 0.2 cm electroporation cuvette containing brain cells (1×106 /mL), electric voltage 240 V, pulse time 5 ms, 6 μg of plasmid, one electric shock, and transfection time of 48 h. We demonstrated that pcDNA3.1-EGFP was successfully transfected into Chinese perch brain cells in vitro. The mRNA expression levels of the appetite genes agrp, pomc, mch, npy were detected after overexpression of learning and memory genes. After overexpression of the c-fos gene, the mRNA expression of the appetite genes pomc and mch was significantly higher. After overexpression of the zif268 gene, there were no significant changes in the mRNA expression levels of the agrp, mch, npy and pomc genes in vitro. In summary, the results confirm that social learning can promote the acquisition of feeding habits in Chinese perch through the c-fos signaling pathway. As a transcription factor, c-Fos is likely to regulate the expression of appetite genes pomc and npy.

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梁慧,何珊,梁旭方.翘嘴鳜学习记忆相关基因c-fos对食欲基因的调控[J].中国水产科学,2021,28(9):1118-1128
LIANG Hui, HE Shan, LIANG Xufang. The effect of learning pathway genes on acquiring novel feeding behaviors in Chinese perch, Siniperca chuatsi[J]. Journal of Fishery Sciences of China,2021,28(9):1118-1128

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  • 在线发布日期: 2021-09-26
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