Changes of melatonin and melatonin receptors on 6-OHDA induced Parkinson's disease in rat / 中华行为医学与脑科学杂志
Chinese Journal of Behavioral Medicine and Brain Science
;
(12): 580-583, 2014.
Article
in Chinese
| WPRIM
| ID: wpr-455532
ABSTRACT
Objective To observe the changes of dopamine and its metabolites,melatonin,as well as melatonin receptors in the substantia nigras (SN) in 6-OHDA induced hemiparkinsonian rats.Methods PD rat was established by a unilateral injection of 6-OHDA into the right substantia nigra pars compacta and medial forebrain bundle.Rats were divided into PD groups and vehicle groups,and sacrificed at 1000 and 2200 respectively,at 3 and 6 weeks post-lesion.The contents of dopamine and its metabolites as well as melatonin were measured by HPLC.The expressions of MT1 and MT2 mRNA and protein were detected by RT-PCR and Western-Blot respectively.Results Dopamine levels declined by 83% and 88% respectively at 3 and 6 weeks post-lesion in the injected side of PD rats,compared with the contralateral side.Melatonin levels in the injected side increased by 22% and 29% respectively.However,melatonin increased by 46% and 31% respectively at 1000 and 2200,at 6 weeks post-lesion in the contralateral side,compared with the same side of the vehicle.The expressions of MT1 and MT2 receptors mRNA were significantly decreased by 91.04% and 90.24% respectively in comparison with the vehicle,while the protein expression of MT1 and MT2 receptors significantly declined by 58% and 70% respectively.Conclusion Increased melatonin and down-regulated MT1 and MT2 receptors in the lesioned SN in 6-OHDA-induced rats may be associated with the progression of PD.
Full text:
Available
Index:
WPRIM (Western Pacific)
Language:
Chinese
Journal:
Chinese Journal of Behavioral Medicine and Brain Science
Year:
2014
Type:
Article
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