评估Rhamdia voulezi暴露在高温下的生理反应和氧化应激效应
Diego Ortiz da Silva1, Jonathan Ratko1, Ana Paula Nascimento Côrrea1
1Adaptive Biology Laboratory, Federal University of Paraná, Av. Cel.Francisco H. dos Santos, s/n, Jardim das Américas, 19031, Curitiba, Paraná, CEP: 81531-970, Brazil.
Fish physiology and biochemistry
|January 4, 2024
概括
高温会导致鱼类Rhamdia voulezi的氧化应激,影响抗氧化防御,并导致细胞损伤. 与和脏相比,肝脏对热应激有更好的生理适应.
科学领域:
- 环境毒理学环境毒理学
- 鱼类生理学 鱼类生理学
- 氧化应激研究研究 氧化应激研究
背景情况:
- 高温会扰乱鱼类的呼吸,增加反应性氧物种的产生.
- 抗氧化剂防御对于减轻环境变化引起的细胞压力至关重要.
- 拉姆迪亚 (Rhamdia voulezi) 是一种具有经济意义的鱼类,原产于巴西的伊瓜苏河.
研究的目的:
- 为了评估暴露于急性热应激的Rhamdia voulezi中的酶性抗氧化生物标志物.
- 测量鱼类关键组织中的非蛋白质醇水平和氧化损伤标志物.
- 了解Rhamdia voulezi.中的高温对组织特异性反应.
主要方法:
- 评估了超氧化物脱酶,甲酶,谷氨酸过氧化酶,谷氨酸S转移酶,谷氨酸减少酶和葡萄糖-6-酸盐脱酶的活性.
- 测量了降低的谷氨水平和脂氧化和碳基化标志物.
- 分析了R. voulezi的肝脏,和脏在暴露在31°C下2,6,12,24和96小时后,与21°C的对照组.
主要成果:
- 肝脏在31°C时显示出超氧化物脱酶 (高达12h) 和谷氨酸S转移酶 (12h,96h) 的增加.
- 在热应力下,体表现出高超氧化脱酶 (长达24小时) 和脂氧化 (2-12小时,96小时) 的升高.
- 脏在12h以增加的超氧化物脱酶和酶反应,并在2-6h显示脂质过氧化.
结论:
- 拉姆迪亚 (Rhamdia voulezi) 组织对急性热应激有不同的反应,表明不同的生理调整.
- 与和脏相比,肝脏对高温的生理适应性更强.
- 观察到的抗氧化生物标志物和氧化损伤的变化表明,R. voulezi暴露在高温下的氧化应激显著.
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