浙江农业学报 ›› 2024, Vol. 36 ›› Issue (2): 247-253.DOI: 10.3969/j.issn.1004-1524.20230104

• 动物科学 • 上一篇    下一篇

日本沼虾桩蛋白基因的克隆与镉胁迫对其表达的影响

彭佳诚1(), 吴越1, 徐洁皓2, 夏美文1, 齐天鹏1, 徐海圣1,3,*()   

  1. 1.浙江大学 动物科学学院,浙江 杭州 310058
    2.浙江万里学院 生物与环境科学学院,浙江 宁波 315100
    3.浙江大学湖州市南太湖现代农业科技推广中心,浙江 湖州 313000
  • 收稿日期:2023-02-06 出版日期:2024-02-25 发布日期:2024-03-05
  • 作者简介:彭佳诚(1998—),男,回族,湖南长沙人,硕士,研究方向为水产动物免疫学。E-mail:enoemos47@163.com
  • 通讯作者: *徐海圣,E-mail:hsxu@zju.edu.cn
  • 基金资助:
    国家科技重大专项(2017ZX07401-002);宁波市海洋生物资源高价值利用公共服务平台(NBHY-2017-P2);湖州市农业科学与技术研究院技术创新团队(2019HN02)

Cloning of paxillin gene from Macrobrachium nipponense and effect of cadmium stress on its expression

PENG Jiacheng1(), WU Yue1, XU Jiehao2, XIA Meiwen1, QI Tianpeng1, XU Haisheng1,3,*()   

  1. 1. College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
    2. College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, Zhejiang, China
    3. Zhejiang University Huzhou South Taihu Lake Modern Agricultural Science and Technology Promotion Center, Huzhou 313000, Zhejiang, China
  • Received:2023-02-06 Online:2024-02-25 Published:2024-03-05

摘要:

镉(Cd)是蓄积性和毒性较强的生物非必需重金属元素之一,会对水生生物造成较大的危害。为更好地了解镉对日本沼虾的分子毒性作用,为水环境镉污染的生态风险预警和评估提供生物标志物,克隆了日本沼虾(Macrobrachium nipponenes)桩蛋白(paxillin)基因MnPXN,并检测了镉胁迫对其表达的影响。MnPXN基因全长为3 655 bp,包含1 491 bp的编码区,编码496个氨基酸;MnPXN蛋白具有6个低复杂区域和3个保守的LIM结构域,与凡纳滨对虾(Litopenaeus vannamei)聚成一支,与家蚕(Bombyx mori)、赤拟谷盗(Tribolium castaneum)等昆虫的亲缘关系较近,与线虫(Nematoda)亲缘关系最远。实时荧光定量PCR(qRT-PCR)结果显示,MnPXN在日本沼虾的肝胰腺、胃、鳃中表达水平较高,在心脏和肌肉中表达水平较低。在0.242 7 mg·L-1 CdCl2中暴露24 h,肝胰腺中MnPXN基因表达水平较对照组均显著升高,0.020 0 mg·L-1 CdCl2胁迫6 h后MnPXN基因表达水平显著升高,24 h表达量达到最大值,96 h恢复至起始水平。RNA干扰能显著(P<0.05)降低MnPXN在肝胰腺中的表达水平,显著(P<0.001)增加日本沼虾的死亡率,表明MnPXN基因能够降低镉胁迫对日本沼虾的毒性作用,其作用机理尚需进一步研究。

关键词: 镉胁迫, 日本沼虾, 桩蛋白, 基因表达, RNA干扰

Abstract:

Cadmium (Cd), with strong accumulation and toxicity, is one of the non-essential heavy metal elements, which could cause great harm to aquatic organisms. To better understand the molecular toxicity of cadmium to Macrobrachium nipponense, and provide biomarkers for ecological risk warning and assessment of cadmium pollution in water environment. In this paper, paxillin gene (MnPXN) of M. nipponense was cloned, and the effect of cadmium stress on its expression was examined. The total length of MnPXN gene is 3 655 bp, including 1 491 bp coding region, encoding 496 amino acids; 6 low complexity regions and 3 conservative LIM domains are included in MnPXN, forming a branch with Litopenaeus vannamei. It is closely related to insects such as silkworm and Tribolium castaneum, and is farthest related to nematodes. The results of quantitative reverse transcriptase-mediated PCR (qRT-PCR) showed that the expression level of MnPXN was high in hepatopancreas, stomach and gill, but low in heart and muscle. The expression level of MnPXN gene in hepatopancreas that after 24 h of treatment with 0.242 7 mg·L-1 CdCl2 was significantly higher than that in control group; After 6 h of 0.020 0 mg·L-1 CdCl2 stress, the expression level of MnPXN gene increased significantly, reaching the maximum at 24 h, and gradually recovered to the initial level at 96 h. Besides, RNA interference could significantly reduce the expression level of MnPXN in hepatopancreas and significantly increase the mortality of M. nipponense, indicating that MnPXN could reduce the toxic effect of cadmium stress on M. nipponense, and its mechanism needs further study.

Key words: cadmium stress, Macrobrachium nipponense, paxillin, gene expression, RNA interference

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