PDF(Pubmed)
Abstract：
There is evidence that indicates that temperature modulates the reproduction of the tropical species Octopus maya, through the over- or under-expression of many genes in the brain. If the oxygen supply to the brain depends on the circulatory system, how temperature affects different tissues will begin in the heart, responsible for pumping the oxygen to tissues. The present study examines the impact of heat stress on the mitochondrial function of the systemic heart of adult O. maya. The mitochondrial metabolism and antioxidant defense system were measured in the systemic heart tissue of female organisms acclimated to different temperatures (24, 26, and 30°C). The results show that acclimation temperature affects respiratory State 3 and State 4o (oligomycin-induced) with higher values observed in females acclimated at 26°C. The antioxidant defense system is also affected by acclimation temperature with significant differences observed in superoxide dismutase, glutathione S-transferase activities, and glutathione levels. The results suggest that high temperatures (30°C) could exert physical limitations on the circulatory system through the heart pumping, affecting nutrient and oxygen transport to other tissues, including the brain, which exerts control over the reproductive system. The role of the cardiovascular system in supporting aerobic metabolism in octopus females is discussed.
摘要：
有证据表明，温度调节热带物种章鱼玛雅的繁殖，通过大脑中许多基因的过度表达或表达不足。如果大脑的氧气供应取决于循环系统，温度如何影响不同的组织将从心脏开始，负责向组织输送氧气。本研究检查了热应激对成年O.maya全身心脏线粒体功能的影响。在适应不同温度（24、26和30°C）的雌性生物的全身心脏组织中测量了线粒体代谢和抗氧化防御系统。结果表明，适应温度会影响呼吸状态3和状态4o（寡霉素诱导的），在26°C适应的雌性中观察到更高的值。抗氧化剂防御系统也受适应温度的影响，在超氧化物歧化酶中观察到显着差异，谷胱甘肽S-转移酶活性，和谷胱甘肽水平。结果表明，高温（30°C）可以通过心脏泵送对循环系统施加物理限制，影响营养和氧气向其他组织的运输，包括大脑,控制生殖系统。讨论了心血管系统在支持章鱼雌性有氧代谢中的作用。
