Read by QxMD icon Read


ShengLi Hu, JianTao Shi, Wei Xiong, WeiNa Li, LiChao Fang, Hua Feng
BACKGROUND: Cognitive impairment is common in people travelling to high altitude. Oxiracetam and electrical stimulation of cerebellar fastigial nucleus may have beneficial impacts. This study was to investigate the effects of preconditioning with Oxiracetam or fastigial nucleus stimulation (FNS) on cognitive decline following the ascension to high altitude. METHODS: The study was conducted on 60 male military voluntary members who were divided into control group, Oxiracetam group, and fastigial nucleus stimulation group...
October 2017: Brain and Behavior
Jun-Jie Jiang, Yan-Ming Xie, Yin Zhang, Yi-Kai Zhang, Zuo-Ming Wang, Bing Han
To understand the medication characteristics of Xingxue@Shuxuening solutions in the real world, multi-center, large-sample-size registration design method is adopted in this study. Between October 2012 and October 2015, hospitalized patients in 27 medical institutions who used Shuxuening and diagnosed as cerebral infarction were observed, including their general information, diagnosis information and medication information. Totally 9 473 cases of cerebral infarction were included, with old people as the majority, and males were slightly more men than females; they were complicated with coronary heart disease, vertebrobasilar artery insufficiency, transient brain ischemia and other cerebrovascular diseases; the medication duration was mostly within 14 days; the dosage was mainly 8-20 mL; 0...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Wan Li, Huihui Liu, Hanjie Jiang, Chen Wang, Yongfei Guo, Yi Sun, Xin Zhao, Xin Xiong, Xianhua Zhang, Ke Zhang, Zongxiu Nie, Xiaoping Pu
Chronic cerebral hypoperfusion is a pathological state that is associated with the cognitive impairments in vascular dementia. Oxiracetam is a nootropic drug that is commonly used to treat cognitive deficits of cerebrovascular origins. However, oxiracetam is currently used as a racemic mixture whose effective ingredient has not been identified to date. In this study, we first identified that (S)-oxiracetam, but not (R)-oxiracetam, was the effective ingredient that alleviated the impairments of spatial learning and memory by ameliorating neuron damage and white matter lesions, increasing the cerebral blood flow, and inhibiting astrocyte activation in chronic cerebral hypoperfused rats...
August 30, 2017: Scientific Reports
Liangliang Huang, Erxin Shang, Wenxiang Fan, Xiang Li, Binbin Li, Shucheng He, Yuxin Fu, Yizhi Zhang, Yunman Li, Weirong Fang
The blood brain barrier (BBB) maintains the basic stability of the brain tissue under physiological conditions, while destroys and exaggerates brain edema and inflammatory response after ischemic stroke. In this study, we researched S-oxiracetam (S-ORC), a nootropic drug, alleviates BBB dysfunction and protects against ischemic stroke in rats. Middle cerebral artery occlusion(MCAO)/reperfusion in rats is applied to mimic ischemic stroke. One hour after reperfusion, rats are administered intravenously with different dose (0...
July 29, 2017: European Journal of Pharmaceutical Sciences
Fang Chen, Jingdong Peng, Shaopu Liu, Huanjun Peng, Ziyu Pan, Lingli Bu, Huan Xiao, Ruiwen Zhang
A highly sensitive detection approach of resonance Rayleigh scattering spectra (RRS) is firstly applied to analyzing nootropic drugs including piracetam (PIR) and oxiracetam (OXI). In HCl-NaAc buffer solution (pH=3.0), the OXI chelated with palladium (II) to form the chelate cation [Pd2·OXI](2+), and then reacted with Congo red (CGR) by virtue of electrostatic attraction and hydrophobic force to form binary complex [Pd2·OXI]. CGR2, which could result in the great enhancement of RRS. The resonance Rayleigh scattering signal was recorded at λex=λem=375nm...
April 15, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Xiao-Li Yao, Zhao-Hui Yao, Li Li, Li Nie, Shao-Feng Zhang
Chronic cerebral hypoperfusion (CCH) induces cognitive deficits. Although CCH can be improved, cognitive impairment is not improved accordingly. To date, many studies have focused on investigating the pathophysiological mechanisms of CCH; however, the treatment of the induced cognitive impairment remains ineffective. Thus, the mechanisms underlying cognitive impairment after CCH and potential agents for treating this impairment need to be explored further. Oxiracetam is a nootropic drug that improves clinical outcomes for some central nervous system (CNS) disorders...
December 30, 2016: Psychiatry Research
Wusan Wang, Hui Ji, Tingting Li, Yuanwei Jia, Haitang Xie
A pharmacokinetic comparison and conformational stability study of S-oxiracetam (S-ORT) and R-oxiracetam (R-ORT) in beagle dogs was used to investigate the possible mechanism of different effects of two oxiracetam enantiomers through a random crossover design. After drug administration to beagle dogs, blood samples were collected at different time points for pharmacokinetic analysis using the UPLC-ESI-MS/MS method. Parts of plasma samples were used for conformation transformation studies using a normal phase high performance liquid chromatographic (NP HPLC) method...
June 1, 2016: Acta Pharmaceutica
Qiuyang Zhang, Wei Yang, Qing Zhang, Yue Yang, Junxiu Li, Yang Lu, Yi Zheng, Jiake He, Di Zhao, Xijing Chen
An enantioselective high-performance liquid chromatography method was developed and validated for the determination of oxiracetam enantiomers, a cognition and memory enhancer, in beagle dog plasma. The plasma samples were prepared by methanol extraction from 200μL plasma, and then the baseline resolution was achieved on a Chiralpak ID column (250mm×4.6mm, 5μm) with mobile phase of hexane-ethanol-trifluoroacetic acid (78:22:0.1, v/v/v) at flow rate of 1.0mL/min. The column elute was monitored using ultraviolet detection at 214nm...
July 1, 2015: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
J Chen, S-N Zhou, Y-M Zhang, Y-L Feng, S Wang
OBJECTIVE: Glycosides of cistanche (GC) is extracted from Xin Jiang Cistanche, which is widely used as a Chinese herb. This study aims to evaluate the effects of GC on vascular dementia (VD). MATERIALS AND METHODS: The VD model was established by the ligature of the bilateral common carotid artery in adult Wistar rats, who received daily i. p. administration of saline, GC (10 mg/kg body weight/d, i.p.) or oxiracetam (450 mg/kg body weight/d, i.p) for 14 days. Morris Water Maze test valued cognitive performance of the rats...
April 2015: European Review for Medical and Pharmacological Sciences
Qiuyang Zhang, Wei Yang, Yue Yang, Han Xing, Qing Zhang, Junxiu Li, Yang Lu, Jiake He, Shuoye Yang, Di Zhao, Xijing Chen
Oxiracetam (ORC), a nootropic drug used for improving the cognition and memory, has an asymmetric carbon in its structure and exists as (S)- and (R)-ORC. The pharmacokinetic profiles of racemic oxiracetam and its pure enantiomers in rats were evaluated and compared by enantioselective high-performance liquid chromatography, which was performed on a Chiralpak ID column with a mobile phase of hexane-ethanol-trifluoroacetic acid (78:22:0.1, v/v/v). The method was validated with respect to selectivity, linearity, accuracy and precision, stability and the limit of quantification...
2015: Journal of Pharmaceutical and Biomedical Analysis
Jie-Feng Cui, Wei Yang, Yan-Ming Xie, Yong Sun, Yan Zhuang, Yong-Yan Wang
This study aims to explore and analyze the condition of concurrent diseases and medicine use of traditional Chinese medicine (TCM) and western medicine among the patients with insomnia. One thousand and sxity seven cases of data from 20 national hospitals' hospital information system (HIS) databases were collected. The frequent concurrent diseases included hypertension (26.9%), brain blood supply insufficiency (24.93%), cerebral infarction (19.49%), blood lipoprotein disturbance (15.28%), coronary heart disease (14...
September 2014: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Chunyan Wang, Fangqin Li, Yu Guan, Lei Zhu, Yiping Fei, Jiadong Zhang, Yujun Pan
This study aimed to investigate the combination effects of bone marrow stromal cells (BMSCs) and oxiracetam for ischemic stroke. Forty Sprague Dawley female rats (220 ± 20 g) were subjected to a 2-hour ischemic middle cerebral artery occlusion (MCAO)-24 hours reperfusion model. The rats were randomly divided into 4 groups. Rats from BMSCs group, oxiracetam group, and BMSCs + oxiracetam group accepted injection of BMSCs (3 × 10(6) cells), oxiracetam (800 mg/kg), and BMSCs + oxiracetam, respectively. Rats from control group did not receive any interventions after ischemia reperfusion...
November 2014: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
Dandan Wang, Shengde Wu
This paper describes a rapid method to determine aceglutamide (ACE) and oxiracetam (OXI) present in an injection formulation using reversed-phase high-performance liquid chromatography. The method was validated with respect to suitability, linearity, accuracy, precision and robustness. Chromatography was carried out on an Elite SinoChrom ODS-BP C18 (5 μm, 250 × 4.60 mm) column with an isocratic mobile phase composed of methanol-phosphate buffer (pH 3.0) in the ratio of 5:95, v/v, at a flow rate of 1.0 mL/min...
May 2015: Journal of Chromatographic Science
Xinhuan Wan, He Wang, Panqin Ma, Long Xi, Jin Sun, Zhonggui He, Xiangrong Zhang, Xiaohong Liu
A simple, rapid and sensitive reversed-phase ultra-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method was developed and validated for the simultaneous quantitative determination of oxiracetam and its degraded substance 4-hydroxy-2-oxo-1-pyrrolidine acetic acid (HOPAA) in rat plasma. After plasma samples were deproteinized with acetonitrile, the post-treatment samples were analyzed on a C18 column interfaced with a triple quadrupole tandem mass spectrometer in the positive electrospray ionization mode at a flow rate of 0...
October 15, 2014: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
Vittorio Pace, James P Rae, David J Procter
The first asymmetric silylation of unsaturated lactams and amides using Cu(I)-NHC catalysts and PhMe2SiBpin has been accomplished. The method has been exploited in an expedient asymmetric synthesis of the (R)-enantiomer of the nootropic drug oxiracetam.
January 17, 2014: Organic Letters
Dong Wan, Lijun Xue, Huifeng Zhu, Yong Luo
To investigate the role and mechanism of catalpol on neuroprotective effects and memory enhancing effects simultaneously, neuroprotective effects of catalpol were assessed by neurological deficits score, TTC staining, and cerebral blood flow detecting. Morris water maze was employed to investigate its effects on learning and memory and then clarify its possible mechanisms relating the central cholinergic system and BDNF. Edaravone and oxiracetam were used for positive control drugs based on its different action...
2013: Evidence-based Complementary and Alternative Medicine: ECAM
Jian-Wei Li, Dong-Jun Yang, Xu-Yi Chen, Hai-Qian Liang
OBJECTIVE: To study the role of oxiracetam on traumatic brain injury in rats. METHODS: Thirty Wistar rats were randomly divided into 3 groups: sham operation group, model group and treatment group. Feeney method were used to establish traumatic brain injury (TBI) model in rats in model and treatment group, and rats in sham group were only broached without hydraumatic fitted. Rats in treatment group were successive administration for 21 days with oxiracetam (100 mg/kg, ig)...
July 2013: Chinese Journal of Applied Physiology
Duk-Shin Lee, Hea Jin Ryu, Ji-Eun Kim, Hui-Chul Choi, Yeong-In Kim, Hong-Ki Song, Tae-Cheon Kang
PURPOSE: Levetiracetam has been reported to be well tolerated and effective in status epilepticus (SE) refractory to benzodiazepine. Because of little preclinical or clinical data concerning the outcomes of LEV in SE-induced neuronal death and vasogenic edema, we investigated the effect of LEV on SE-induced injury in comparison to diazepam (DZP), and valproate (VPA). METHODS: Two hours after pilocarpine-induced SE, rats were given one of the following drugs; (1) DZP, (2) LEV, (3) VPA, (4) DZP+LEV, (5) DZP+VPA, and (6) DZP+oxiracetam...
June 2013: Seizure: the Journal of the British Epilepsy Association
Wei Ma, Huanxin Xu, Zuozhen Liu, Fanghong Ning
A monolithic column of macro porous poly (glycidyl methacrylate-divinylbenzene) (poly(GMA-DVB)) has been prepared by free radical polymerization within the confines of a chromatographic stainless steel tube (50 mm x 4.6 mm). For the best separation and low back pressure, orthogonal experiments were carried out with V (cyclohexanol): V (dodecanol), V (GMA): V (DVB) and BPO dosage as the three main factors. The characteristic feature of the column, including specific surface area, pore volume as well as pore diameter distribution, was studied by scanning electron microscopy (SEM), mercury intrusion porosimetry analysis and BET analysis...
February 2010: Se Pu, Chinese Journal of Chromatography
Xianqin Wang, Jiayin Zhu, Renai Xu, Xuezhi Yang, Haiya Wu, Dan Lin, Faqing Ye, Lufeng Hu
A sensitive and selective liquid chromatography-tandem mass spectrometry method for the determination of piracetam in rat plasma was developed and validated over the concentration range of 0.1-20 µg/mL. After addition of oxiracetam as internal standard, a simplified protein precipitation with trichloroacetic acid (5%) was employed for the sample preparation. Chromatographic separation was performed by a Zorbax SB-Aq column (150 × 2.1 mm, 3.5 µm). The mobile phase was acetonitrile-1% formic acid in water (10:90 v/v) delivered at a flow rate of 0...
October 2010: Biomedical Chromatography: BMC
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"