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首页> 外文期刊>Journal of Molluscan Studies >Natural aestivation and antioxidant defence in Helix pomatia: effect of acclimation to various external conditions
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Natural aestivation and antioxidant defence in Helix pomatia: effect of acclimation to various external conditions

机译：螺旋血球的自然培养和抗氧化防御：适应各种外部条件的影响

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摘要

During summer land snails are repeatedly exposed to low oxygen tension and to enhanced production of reactive oxygen species due to aestivation/arousal cycles. To test the role of reduced glutathione (GSH - the main endogenous antioxidant) and effect of season on its function we examined activities of glutathione-related enzymes and concentration of GSH in Helix pomatia snails (1) during their natural aestivation/arousal cycle in summer and (2) after their acclimation to different thermal and photoperiod conditions in autumn. Natural aestivation evoked decreases in activity of glutathione reductase (GR) in the hepatopancreas and kidney and an increase in activity of glutathione transferase (GST) in the hepatopancreas, but did not affect activity of glutathione peroxidase (GPX) and concentration of GSH in these organs. Activities of GR in both organs and GST in the kidney were highly affected by acclimation to summer-specific ambient conditions, whereas activity of GPX and GSH concentration were affected by acclimation to 25 degrees C at a short-day photoperiod. In conclusion, H. pomatia maintains relatively high organ concentrations of reduced glutathione but can also modulate its enzymatic antioxidant defence system according to environmental conditions.
机译：在夏季，蜗牛会反复受到低氧张力的影响，并且由于耕种/刺激循环而使活性氧的产量增加。为了测试还原型谷胱甘肽（GSH-主要的内源抗氧化剂）的作用以及季节对其功能的影响，我们在夏季自然吸食/刺激周期中检查了螺旋螺（1）中谷胱甘肽相关酶的活性和GSH的浓度。 （2）在秋季适应不同的热和光周期条件之后。自然引诱引起肝胰腺和肾脏中的谷胱甘肽还原酶（GR）活性降低，肝胰腺中的谷胱甘肽转移酶（GST）活性升高，但不影响这些器官中的谷胱甘肽过氧化物酶（GPX）活性和GSH浓度。适应夏季特定的环境条件会极大地影响器官中GR的活性和肾脏中GST的活性，而短期光照下适应25°C会影响GPX和GSH的活性。综上所述，波马菌可维持较高的还原型谷胱甘肽器官浓度，但还可根据环境条件调节其酶促抗氧化防御系统。

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