The study of morphine mitochondrial toxicity impact on cat electroencephalogram_Journal of Epilepsy

Authors：

GUO Tao ,  WU Jiang , CHEN Yao , LIU Qianwei , LAN Yanqin

Department of Functional Neurosurgery, Hebei General Hospital, Shijiazhuang, China;

Corresponding?author：

WU Jiang, Email: wujiang104@126.com

Keywords：

Morphine; Electroencephalogram; Ultramicro; Cat

DOI：

10.7507/2096-0247.20200003

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Objective To analyze the effect of mitochondrial ultrastructural changes caused by morphine toxicity on abnormal discharge of cat cerebral cortex, and to explore the possible mechanism of brain function damage caused by morphine dependence.Methods Twelve domestic cats were divided into control group (3 cats) and morphine exposed group (9 cats) according to the method of random number table. After the model was successfully established by the method of dose increasing, the changes of mitochondrial ultrastructure of cortical neurons were observed under the electron microscope.Results Electroencephalogram (EEG) monitoring in morphine exposed group showed that the cortical EEG was widely abnormal, physiological waves were reduced, and abnormal discharges were frequent. And the electron microscopy showed that the number, morphology, internal membrane structure and the inclusion body in the matrix of neurons changed in various aspects. The EEG and electron microscopy of the control group were normal.Conclusion Morphine can damage neurons in the cerebral cortex and lead to abnormal discharge, which is closely related to the ultrastructural changes of neuron mitochondria. The toxicity of morphine mitochondria can be the initial mechanism of energy metabolism dysfunction of brain cells and eventually lead to the disorder of brain electrophysiological function.

Citation： GUO Tao, WU Jiang, CHEN Yao, LIU Qianwei, LAN Yanqin. The study of morphine mitochondrial toxicity impact on cat electroencephalogram. Journal of Epilepsy, 2020, 6(1): 12-15. doi: 10.7507/2096-0247.20200003 Copy

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1. 趙美順, 陳敬榮, 楊紅. β淀粉樣蛋白神經毒性與線粒體功能異常研究進展. 廣東藥學院學報, 2012, 28(6): 689-692.
2. Maldonado R, Negus S, Koob GF. Precipitation of morphine withdrawal syndrome in rats by administration of mu-, delta-and kappa-selective opioid antagonists. Neuropharmacology, 1992, 21(12): 1231-1241.
3. 郭韜, 杜亞麗, 張素芳, 等. 嗎啡急性成癮貓模型的建立. 腦與神經疾病雜志, 2008, 16(6): 711-712.
4. 朱筑霞, 吳澤江, 王旭東, 等. 胚胎期和生長期子代大鼠砷暴露對腦細胞線粒體功能和超微結構的影響. 環境與健康雜志, 2011, 6(28): 488-490.
5. Bazil JN, Dash RK. A minimal model for the mitochondrialrapid mode of Ca²⁺ uptake mechanism. PLoS One, 2011, 6(6): 213-224.
6. Pan S, Ryu SY, Sheu SS. Distinctive characteristics andfunctions of multiple mitochondrial Ca²⁺ influx mechanisms. Sci China Life Sci, 2011, 54(8): 763-769.

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