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首页> 外文期刊>Fish Physiology and Biochemistry >Cadmium exposure affects growth performance, energy metabolism, and neuropeptide expression in Carassius auratus gibelio
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Cadmium exposure affects growth performance, energy metabolism, and neuropeptide expression in Carassius auratus gibelio

机译：镉暴露会影响Carassius Auratus Gibelio的生长性能，能量代谢和神经肽表达

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摘要

Cadmium (Cd) is the most abundant heavy metal in aquatic environments and is easily detected on a global scale. Carassius auratus gibelio is a common aquaculture species. The aim of this study was to explore the toxic effects of 1, 2, and 4 mg/L Cd on the energy metabolism, growth performance, and neurological responses of C. gibelio. After 30 days of exposure, Cd concentrations in the liver and brain were significantly increased in Cd-exposed groups. Low-level Cd exposure (1 mg/L) increased weight and length gains, as well as food intake, in the fish. Acetylcholinesterase activity decreased significantly in the Cd-exposed groups. Energy metabolism levels (as reflected by oxygen consumption, ammonia excretion rate, and swimming activity), as well as serum T3 and T4 levels, increased significantly in the fish exposed to 1 mg/L Cd. However, energy metabolism and serum T3/T4 levels decreased significantly in the 4-mg/L Cd group. Neuropeptide gene expression levels in brain were consistent with the observed changes in food intake. In the Cd-exposed groups, the expression levels of neuropeptide Y (NPY), apelin, and metallothionein (MT) increased significantly, while those of pro-opinmelanocortin (POMC), ghrelin, and corticotrophin-releasing factor (CRF) decreased significantly. Our data suggested that in fish, low doses of Cd might increase food intake, as well as weight and length gains, but high doses of Cd might have the opposite effect. These effects might be a result of neurohumoral regulation. Long-term exposure to low doses of Cd might cause weight gain and affect food intake.
机译：镉（CD）是水产环境中最丰富的重金属，在全球范围内很容易检测到。 Carassius auratus Gibelio是一种常见的水产养殖物种。本研究的目的是探讨1,2和4mg / L CD对吉布里奥的能量代谢，生长性能和神经应答的毒性作用。在接触30天后，CD曝光组肝脏和脑中的CD浓度显着增加。低水平CD暴露（1 mg / L）增加重量和长度的增长，以及鱼类中的食物摄入量。乙酰胆碱酯酶活性在CD暴露基团中显着降低。能量代谢水平（由氧气消耗，氨排泄率和游泳活动反映）以及血清T3和T4水平，在暴露于1mg / L Cd的鱼中显着增加。然而，在4-Mg / L CD组中，能量代谢和血清T3 / T4水平显着下降。大脑中的神经肽基因表达水平与观察到的食物摄入量的变化一致。在CD暴露的基团中，神经肽Y（NPY），阿糖蛋白和金属硫蛋白蛋白（MT）的表达水平显着增加，而PRO-Impormelanocortin（POMC），Ghrelin和CorticoTrocin释放因子（CRF）显着下降。我们的数据表明，在鱼类中，低剂量的Cd可能会增加食物摄入量，以及重量和长度的增长，但高剂量的CD可能具有相反的效果。这些效果可能是神经胃部调节的结果。长期暴露于低剂量Cd可能会导致体重增加并影响食物摄入量。

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  • 来源
    《Fish Physiology and Biochemistry》 |2020年第1期|共11页
  • 作者

    Cai Yanan; Yin Yuwei; Li Yueru; Guan Lili; Zhang Peijun; Qin Yue; Wang Yunxiang; Li Yuehong;

  • 作者单位

    Jilin Agr Univ Coll Anim Sci &

    Technol Changchun 130118 Jilin Peoples R China;

    Jilin Agr Univ Coll Anim Sci &

    Technol Changchun 130118 Jilin Peoples R China;

    Minist Agr Lab Ginseng &

    Antler Prod Qual &

    Safety Risk Asse Changchun 130118 Jilin Peoples R China;

    Jilin Agr Univ Coll Life Sci Changchun 130118 Jilin Peoples R China;

    Hlth Monitoring &

    Inspect Ctr Jilin Prov Changchun 130062 Jilin Peoples R China;

    Jilin Agr Univ Coll Anim Sci &

    Technol Changchun 130118 Jilin Peoples R China;

    Jilin Agr Univ Coll Anim Sci &

    Technol Changchun 130118 Jilin Peoples R China;

    Jilin Agr Univ Coll Anim Sci &

    Technol Changchun 130118 Jilin Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 水产、渔业;
  • 关键词

    Cadmium; Thyroid hormone; Neuropeptide; Food intake;

    机译：镉;甲状腺激素;神经肽;食物摄入;

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