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首页> 外文期刊>Bulletin de la Societe Zoologique de France >REPONSE AU CUIVRE DU SYSTEME ANTIOXYDANT DE LA CARPE (CYPRINUS CARPIO L.) SAINE OU PARASITEE PAR LE CESTODE PTYCHOBOTHRIUM SP.
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REPONSE AU CUIVRE DU SYSTEME ANTIOXYDANT DE LA CARPE (CYPRINUS CARPIO L.) SAINE OU PARASITEE PAR LE CESTODE PTYCHOBOTHRIUM SP.

机译：虫PTYCHOBOTHRIUM SP对健康或寄生虫的鲤鱼抗氧化剂系统（CYPRINUS CARPIO L.）的铜的响应。

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摘要

High concentrations of heavy metals are present in many sources of wastewater and numerous studies have found them to be toxic to aquatic organisms especially fish species. Accumulated in fish, they can lead to redox reactions, generating free radicals especially reactive oxygen species (ROS). However, aquatic organisms have evolved defences to protect them against damages of oxyradical production. Thus, antioxidant enzymes such as catalase, glutathione s-transferase (GST), glutathione reductase (GRd) are induced in response to ROS production. The antioxidant response in fish can be modulated by natural environmental influences such as photoperiod, thermoperiod... In the present study, we studied the effect of a parasitose on the fish antioxidative response to a metallic environmental pollution. We examined a carp population coming from a local fish breeding and constituted by two kinds of fish : healthy or carrying an intestinal parasite : Ptychobothrium sp. We exposed these two groups to copper and assessed the activities of antioxidant enzymes (catalase, glutathione S-transferase, glutathione reductase) in the liver and the head kidney. An increased antioxidant response (Catalase, GST and GRd activities in liver and GST in head kidney) was observed in carp parasitized by Ptychobothrium sp. compared to healthy fish. This response might be linked to an increase in host metabolic activity related to the presence of parasite. When carps were maintained in copper-containing water, the antioxidant activities in liver decreased in comparison with control. This decrease in enzymatic activities observed was less pronounced in parasitized than in healthy fish. However, no significant effects of copper treatment was observed in most of the antioxidant enzymes in head kidney. This research demonstrated that a parasitic infection like Ptychobothrium sp. can stimulate some components of the fish antioxidant system and modulate the antioxidant response of heavy metal exposed fish.
机译：许多废水中都含有高浓度的重金属，许多研究发现它们对水生生物特别是鱼类具有毒性。它们在鱼类中积累，会导致氧化还原反应，产生自由基，尤其是活性氧（ROS）。然而，水生生物已经进化出防御能力以保护它们免受羟自由基生产的损害。因此，响应于ROS产生，诱导了抗氧化酶，例如过氧化氢酶，谷胱甘肽S-转移酶（GST），谷胱甘肽还原酶（GRd）。鱼类中的抗氧化反应可以通过光周期，热周期等自然环境影响来调节。在本研究中，我们研究了寄生虫对鱼类对金属环境污染的抗氧化反应的影响。我们检查了鲤鱼种群，这些鲤鱼是由本地鱼类繁殖而来的，由两种鱼类构成：健康的或携带肠道寄生虫的：鼠疫菌属（Ptychobothrium sp。）。我们将这两组暴露于铜中，并评估了肝脏和头部肾脏中的抗氧化酶（过氧化氢酶，谷胱甘肽S-转移酶，谷胱甘肽还原酶）的活性。在被Ptychobothrium sp寄生的鲤鱼中，观察到抗氧化剂响应增加（肝脏中的过氧化氢酶，GST和GRd活性以及头部肾脏中的GST）。比较健康的鱼。该反应可能与与寄生虫的存在有关的宿主代谢活性的增加有关。当鲤鱼放在含铜水中时，肝脏中的抗氧化活性与对照相比下降了。在寄生虫中观察到的这种酶活性的降低不如在健康鱼中明显。然而，在头部肾脏的大多数抗氧化酶中，未观察到铜处理的显着效果。这项研究表明，寄生虫感染像Ptychobothrium sp。可以刺激鱼类抗氧化系统的某些成分，并调节暴露于重金属的鱼类的抗氧化反应。

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