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首页> 外文期刊>Fish Physiology and Biochemistry >Physiological and oxidative stress response of goldfish Carassius auratus induced by a light dimming system
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Physiological and oxidative stress response of goldfish Carassius auratus induced by a light dimming system

机译：光调系统诱导金鱼Carassius Auratus的生理和氧化应激响应

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摘要

Light is an essential factor for organisms and affects the endocrine and stress regulation of fish in nature. However, sudden changes in light and dark conditions in artificial environments can negatively impact fish. In the present study, to evaluate the physiological and oxidative stress responses of goldfish (Carassius auratus) exposed to two different light conditions, sudden light changes and slowly dimming light changes for 24 h, we analyzed the mRNA expression and activity of stress indicators [corticotropin-releasing hormone (CRH) and pro-opiomelanocortin (POMC)], levels of plasma cortisol and glucose, mRNA expression of glucocorticoid receptor (GR), and activity of plasma oxidative stress indicators (superoxide dismutase and catalase). Consequently, the mRNA expressions and activities of CRH and POMC, plasma levels of cortisol and glucose, and mRNA expression of GR were found to be significantly increased during the light changes, particularly in the control group. Additionally, plasma levels of cortisol and glucose in the control group were significantly higher than those in the dimming group during the light changes. However, no significant differences in mRNA expression levels and activities of antioxidant enzymes both in the control and dimming groups were observed. These results indicate that dimming light induces less stress than sudden changes in light.
机译：光是生物体的必要因素，并影响鱼类内分泌和压力调节。然而，人工环境中的光和暗条件的突然变化可能会产生负面影响。在本研究中，为了评估金鱼（Carassius auratus）的生理和氧化应激反应暴露于两种不同的光线条件，突然的光线变化和缓慢调光的光线变化24小时，我们分析了胁迫指示剂的mRNA表达和活性[Corticotropin -Releleasing Hormone（CRH）和Pro-Omiomelanocortin（POMC）]，血浆皮质醇和葡萄糖的水平，糖皮质激素受体（GR）的mRNA表达，以及血浆氧化应激指示剂（超氧化物歧化酶和过氧化氢酶）的活性。因此，在光变化期间，发现CRH和POMC，皮质醇和葡萄糖的血浆水平和血糖血糖和葡萄糖的mRNA表达和MRNA表达显着增加，特别是在对照组中。另外，在光变化期间，对照组中皮质醇和葡萄糖的血浆水平显着高于调光组中的水平。然而，观察到对照和调光组中没有MRNA表达水平和抗氧化酶活性的显着差异。这些结果表明，调光光比光的突然变化诱导更少的压力。

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