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Levels of immunoreactive dynorphin A1-13 during development of morphine dependence in rats

  
@article{APS9006,
	author = {Xin-Wang Wan and Wan-Hai Li and Mao Huang and Zhen-Dong You and Ye-Xiong Tan and Chang-Lin Lu and Ze-Hui Gong},
	title = {Levels of immunoreactive dynorphin A1-13 during development of morphine dependence in rats},
	journal = {Acta Pharmacologica Sinica},
	volume = {19},
	number = {6},
	year = {2016},
	keywords = {},
	abstract = {AIM: To study the relationship between the levels of immunoreactive dynorphin A1-13 (ir-dynorphin A1-13) and the degree of morphine dependence. 
METHODS: The levels of ir-dynorphin A1-13 in discrete brain regions, spinal cord, and plasma in rats were determined by radioimmunoassay, and the degree of morphine dependence was assessed by scoring withdrawal signs on d 3, d 6, and d 12. 
RESULTS: Morphine injection s.c. decreased the levels of ir-dynorphin A1-13 in spinal cord, pituitary, and plasma. The levels of ir-dynorphin A1-13 in hippocampus and hypothalamus were increased. No changes in cortex, midbrain, cerebellum, pons, and medulla were observed. With continuous injection of morphine, withdrawal signs scores were increased on d 6, but there was no difference between the scores of d 6 and d 12. 
CONCLUSION: The changes of the levels of endogenous ir-dynorphin A1-13 in pituitary, spinal cord, and plasma were compatible with the degree of morphine dependence.},
	issn = {1745-7254},	url = {http://www.chinaphar.com/article/view/9006}
}