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Molecules 2016, 21(9), 1107; doi:10.3390/molecules21091107

Neuroprotective Effects of a Standardized Flavonoid Extract from Safflower against a Rotenone-Induced Rat Model of Parkinson’s Disease

1
Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
2
State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China
3
Department of Radiology, Peking University Third Hospital, Beijing100191, China
4
Department of Radiology, Dongying People’s Hospital of Shandong, Dongying 257091, China
5
Department of Molecular and Cellular Pharmacology, School of Basic Medical Sciences, Peking University, Beijing100191, China
6
Beijing Key Lab of MRI Device and Technique, Peking University Third Hospital, Beijing 100191, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Celestino Santos-Buelga and Arturo San Feliciano
Received: 22 April 2016 / Revised: 16 June 2016 / Accepted: 16 August 2016 / Published: 24 August 2016
(This article belongs to the Special Issue Flavonoids: From Structure to Health Issues)
View Full-Text   |   Download PDF [4336 KB, uploaded 26 August 2016]   |  

Abstract

Parkinson’s disease (PD) is a major age-related neurodegenerative disorder characterized by the loss of dopaminergic neurons in the substantia nigra par compacta (SNpc). Rotenone is a neurotoxin that is routinely used to model PD to aid in understanding the mechanisms of neuronal death. Safflower (Carthamus tinctorius. L.) has long been used to treat cerebrovascular diseases in China. This plant contains flavonoids, which have been reported to be effective in models of neurodegenerative disease. We previously reported that kaempferol derivatives from safflower could bind DJ-1, a protein associated with PD, and that a flavonoid extract from safflower exhibited neuroprotective effects in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced mouse model of PD. In this study, a standardized safflower flavonoid extract (SAFE) was isolated from safflower and found to primarily contain flavonoids. The aim of the current study was to confirm the neuroprotective effects of SAFE in rotenone-induced Parkinson rats. The results showed that SAFE treatment increased body weight and improved rearing behavior and grip strength. SAFE (35 or 70 mg/kg/day) treatment reversed the decreased protein expression of tyrosine hydroxylase, dopamine transporter and DJ-1 and increased the levels of dopamine and its metabolite. In contrast, acetylcholine levels were decreased. SAFE treatment also led to partial inhibition of PD-associated changes in extracellular space diffusion parameters. These changes were detected using a magnetic resonance imaging (MRI) tracer-based method, which provides novel information regarding neuronal loss and astrocyte activation. Thus, our results indicate that SAFE represents a potential therapeutic herbal treatment for PD. View Full-Text
Keywords: safflower flavonoid extract; Parkinson’s disease; DA; MRI safflower flavonoid extract; Parkinson’s disease; DA; MRI
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Ablat, N.; Lv, D.; Ren, R.; Xiaokaiti, Y.; Ma, X.; Zhao, X.; Sun, Y.; Lei, H.; Xu, J.; Ma, Y.; Qi, X.; Ye, M.; Xu, F.; Han, H.; Pu, X. Neuroprotective Effects of a Standardized Flavonoid Extract from Safflower against a Rotenone-Induced Rat Model of Parkinson’s Disease. Molecules 2016, 21, 1107.

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