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Haiyan W.,Ningxia Medical University | Yuxiang L.,Ningxia Medical University | Linglu D.,Ningxia Medical University | Tingting X.,Ningxia Medical University | And 6 more authors.
Pharmaceutical Biology | Year: 2013

Context: Sophora alopecuroides L. (Leguminosae) is a commonly used Chinese herbal drug that possesses antipyretic, anti-inflammatory and analgesic effects. Among various alkaloids isolated from S. alopecuroides, matrine has been identified as the major bioactive component contributing to a variety of pharmacological effects, and studies have also shown that matrine has an analgesic effect. Objective: To investigate the antinociceptive effects of matrine on neuropathic pain induced by chronic constriction injury (CCI) in mice. Materials and methods: The von Frey, plantar, cold-plate, locomotor activity and rota-rod test were performed to assess the degree of mechanical, radiant, thermal, spontaneous locomotor activity and motor coordination changes respectively, at different time intervals, i.e., one day before surgery and 7, 8, 10, 12 and 14 days post surgery. Matrine was administered from the 8th day after the surgery for seven days. Results: Our present study shows that matrine at the dose of 30 mg/kg i.p. increased the paw withdrawal threshold (0.88 ± 0.16), paw withdrawal latency (7.01 ± 0.11) and the counts of paw withdrawal (19.7 ± 1.15) from the day 8 for the nerve injured paw compared to the CCI group (0.18 ± 0.04, 4.62 ± 0.18, 44.3 ± 2.99, respectively). Matrine, in a dose-dependent effect, was also found to produce a protective role in both plantar and cold-plate tests. The analysis of the effect supports the hypothesis that matrine is useful in neuropathic pain therapy. Discussion and conclusion: The results of this study suggest that matrine could be useful in the treatment of different kinds of neuropathic pains as an adjuvant to conventional medicines. © 2013 Informa Healthcare USA, Inc. Source


Wang H.,Ningxia Medical University | Ma L.,Ningxia Key Laboratory of Craniocerbral Diseases of Ningxia Hui Autonomous Region | Liu J.,Ningxia Medical University | Zhao C.,Ningxia Medical University | And 6 more authors.
Pharmaceutical Biology | Year: 2013

Context: Primary dysmenorrhea is one of the most frequent gynecological disorders in young women. Chinese herbal medicine has the advantage in terms of multi-targeting efficacy, lower toxicity, as well as lower cost. Core licorice is the hard and atropurpureus heart part in root and rootstock of Glycyrrhiza uralensis Fisch (Leguminosae), having a therapeutic effect on dysmenorrhea. Objective: This experiment indicated the spasmolytic effect of core licorice aqueous extract (CLE) on spontaneous rhythmic contractions and spasmogen-provoked contractions of stilbestrol primed, estrogen-dominated, non-pregnant mouse isolated uterine horns and its spasmolytic mechanism. Materials and methods: We investigated the spasmolytic effect of CLE (0.025-0.1mg/mL) on spontaneous contractions and potassium chloride (KCl, 40mM), acetylcholine (ACh, 5μg/mL), carbachol (CCh, 5μg/mL), oxytocin (OT, 2 U/L) or bradykinin (5ng/mL)-provoked contractions of mouse isolated uterine horns. Contractions were recorded by tension force transducers using Biolap 420F software on a PC. Results: Our present study showed that graded, escalated concentrations of CLE (0.025-0.1mg/mL) significantly inhibited the amplitude of spontaneous phasic contractions (15.03-55.10%), as well as the contractions produced by KCl (40mM; 20.16-53.99%), ACh (5μg/mL; 14.65-48.32%), CCh (5μg/mL; 38.40-76.70%), OT (2 U/L; 21.53-58.49%) or bradykinin (5ng/mL; 58.01-79.44%) of the estrogen-dominated isolated mice uterine horn preparations in a concentration-related manner. Discussion and conclusion: The spasmolytic effect of CLE observed in the present study lends pharmacological support to the traditional use of core licorice in the management, control and treatment of primary dysmenorrhea. © 2013 Informa Healthcare USA, Inc. All rights reserved: reproduction in whole or part not permitted. Source


Rui C.,Ningxia Medical University | Yuxiang L.,Ningxia Medical University | Yinju H.,Ningxia Medical University | Qingluan Z.,Ningxia Medical University | And 12 more authors.
Journal of Molecular Histology | Year: 2012

This study investigated the protective effects of Lycium barbarum polysaccharide (LBP) on alleviating injury from oxygen-glucose deprivation/reperfusion (OGD/ RP) in primary cultured rat hippocampal neurons. Cultured hippocampal neurons were exposed to oxygen-glucose deprivation (OGD) for 2 h followed by a 24 h re-oxygenation. The MTT assay and the lactate dehydrogenase (LDH) release were used to determine the neuron viability. Superoxide dismutase (SOD), Glutathione peroxidase (GSH-PX), malondialdehyde (MDA) were determined by spectrophotometry using commercial kits. Mitochondrial membrane potential (MMP) and the intracellular free calcium concentration ([Ca2+]i) in hippocampal neurons were measured using the confocal laser scanning microscope (CLSM). Treatment with LBP (10-40 mg/l) significantly attenuated neuronal damage and inhibited LDH release in a dose-dependent manner. Furthermore, LBP enhanced activities of SOD and GSH-PX but it decreased their MDA content, inhibited [Ca2+]i elevation and decrease of MMP in ischemia-reperfusion treated hippocampal neurons. These findings suggested that LBP may be a potential neuroprotective agent for cerebral ischemia-reperfusion injury. © Springer Science+Business Media B.V. 2012. Source


Wang H.,Ningxia Medical University | Wang H.,Shanghai JiaoTong University | Li Y.,Ningxia Medical University | Dun L.,Ningxia Medical University | And 9 more authors.
Phytomedicine | Year: 2013

Purpose In this study we investigated antinociceptive effects of oxymatrine through regulation of NR2B-containing NMDA receptor-ERK/CREB signaling in a chronic neuropathic pain model induced by chronic constrictive injury (CCI) of the sciatic nerve. Methods The von Frey and plantar tests were performed to assess the degree of mechanical and thermal changes respectively. Immunohistochemistry assay was used to evaluate the expressions of NR2B. Western blotting assay were used to evaluate the expressions of NR2B, tERK, p-ERK, tCREB and p-CREB. Results The intraperitoneal administration of OMT (160, 80 mg/kg) could prevent the development of mechanical allodynia, thermal hyperalgesia induced by CCI. Intraperitoneal administration of OMT decreased the mean IOD of NR2B in the dorsal horn and expression of NR2B, p-ERK and p-CREB protein. Conclusion Regulation of NMDA NR2B receptor-ERK/CREB signaling maybe the targets for the antinociceptive effects of OMT on a chronic neuropathic pain model induced by chronic constrictive injury of the sciatic nerve. © 2013 Elsevier GmbH. Source


Rui C.,Ningxia Medical University | Yuxiang L.,Ningxia Medical University | Ning J.,Shanghai Pudong New Area Gongli Hospital | Ningtian M.,Ningxia Medical University | And 7 more authors.
Planta Medica | Year: 2013

In this study, we investigated the neuroprotective effect of oxysophoridine on ischemia and ischemia-like insults. Protection by oxysophoridine was studied at the in vivo level using a model of middle cerebral artery occlusion in mice and at the in vitro level using primary rat hippocampal neuronal cultures exposed to oxygen-glucose deprivation, a model of ischemia-like injury. The behavioral test was performed by using the neurological scores. The infarction volume of brain was assessed in the brain slices stained with 2,3,5-triphenyl tetrazolium chloride. The neuron apoptosis was evaluated by Hoechst 33342 staining. The morphological change in the neurons was examined using a Transmission Electron Microscope (TEM or EM). To evaluate neuron apoptosis, caspase-3, -9, and - 8 activities were measured using assay kits with an ELISA reader. The Western blotting assay was used to evaluate the release of cytochrome c and expression of caspase-3, Bcl-2, and Bax proteins. The quantitative real-time PCR assay was used to evaluate the release of cytochrome c and the expression of caspase-3 mRNA. Oxysophoridine-treated groups (62.5, 125, 250 mg/kg) markedly reduced neurological deficit scores and infarct volumes. Treatment with oxysophoridine (5, 20, 80 mol/L) significantly attenuated neuronal damage, with evidence of decreased cell apoptosis and decreased cell morphologic impairment. Furthermore, treatment with oxysophoridine could effectively downregulate the expression of cytochrome c and caspase-3 in both mRNA and protein levels, and Bax in the protein level, and induce an increase of Bcl-2 in the protein level. The caspase-3, -9, and -8 activities were also inhibited. These findings suggested that oxysophoridine may be a potential neuroprotective agent for cerebral ischemia injury. © 2013 Georg Thieme Verlag KG Stuttgart New York. Source

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