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Chronic stress effects on adenine nucleotide hydrolysis in the blood serum and brain structures of rats.

机译:慢性应激对大鼠血清和脑结构中腺嘌呤核苷酸水解的影响。

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摘要

We have previously observed that adenosine 5'-diphosphate (ADP) hydrolysis was decreased 25% in spinal cord synaptosomes of chronically stressed male rats, while no changes were observed in ATPase activity. In the present study, we investigated the effect of chronic stress on the hydrolysis of adenine nucleotides in two cerebral structures (frontal cortex and hypothalamus) and in the blood serum of male rats. Adult male Wistar rats were submitted to 1-h restraint stress/day for 45 days (chronic) and were sacrificed 24 h after the last session of stress. Adenosine 5'-triphosphate (ATP) or ADP hydrolysis was assayed in the synaptosomal fraction obtained from the frontal cortex and hypothalamus of control and chronically stressed animals. No effects on ADP or ATP hydrolysis were observed in any of the cerebral structures analyzed after chronic stress. On the other hand, reduced ADP hydrolysis was observed in the blood serum of chronic stressed rats. It is possible that the effects observed in the blood serum may represent an adaptation to chronic stress and may reflect different functions of nucleotides and/or enzymes in these tissues. It is possible that altered levels of ADPase activity in the serum may be a biochemical marker for chronic stress situations.
机译:我们以前曾观察到,慢性应激雄性大鼠的脊髓突触小体中腺苷5'-二磷酸(ADP)水解降低了25%,而ATPase活性未见变化。在本研究中,我们调查了慢性应激对雄性大鼠两个大脑结构(额叶皮层和下丘脑)和血清中腺嘌呤核苷酸水解的影响。成年雄性Wistar大鼠每天接受1小时束缚压力45天(慢性),并在最后一次应激后24 h处死。在从对照组和慢性应激动物的额叶皮层和下丘脑获得的突触体部分中检测了5'-三磷酸腺苷(ATP)或ADP水解。在慢性应激后分析的任何大脑结构中均未观察到对ADP或ATP水解的影响。另一方面,在慢性应激大鼠的血清中观察到降低的ADP水解。在血清中观察到的作用可能代表了对慢性应激的适应,并且可能反映了这些组织中核苷酸和/或酶的不同功能。血清中ADPase活性水平的改变可能是慢性应激情况的生化指标。

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