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Objective To investigate the influence of donepezil on neurogenesis in the subventricular zone (SVZ) under the cerebral ischemic conditions. Methods Sixty mice were randomly assigned to a sham +vehicle group, a middle cerebral artery occlusion(MCAO) + vehicle group and a MCAO + donepezil group, 20 in each group. A model of MCAO was established. Neural stem cells/progenitor cells were labeled by Mash1, and neuroblasts were labeled by doublecortin (DCX). The expressions of DCX in the SVZ cells of each group were detected by immunofluorescence. The expressions of Mash1 and DCX in the SVZ cells of each group were quantified by Western blot. Results 10 days after MCAO was undergone, DCX-positive cells were seen in the SVZ of each group, and the expressions of DCX and Mash1 in MCAO + vehicle group were markedly increased as compared with the sham + vehicle group (P < 0.05), and that in MCAO + donepezil group were significantly increased as compared with the other two groups (P < 0.05). Conclusion As a kind of acetylcholinesterase inhibitors, donepezil can promote neurogenesis in SVZ under the cerebral ischemic conditions.
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Objective To observe the effect of bone marrow mononuclear cells (BMMNCs) transplantation on high mobility group box1 (HMGB1) migration in stroke mouse. Methods BMMNCs were harvest and injected intravenously into stroke mouse model; modified neurological severity scores(mNSS) were tested; brain infarct vol-ume and related protein expression levels were measured, then HMGB1 migration were observed. Results mNSS score and brain infarct volume in transplantation group weresignificantly lower than vehicle group , while HMGB1 expression were significantly higher than vehicle group. The expression levels of RAGE and TNF-α in transplanta-tion group were significantly lower than vehicle group. Immunofluorescence assay showed that the release of HMGB1 in brain penumbra area of transplanted mouse was significantly less than vehicle groups. Conclusions BMMNCs transplantation could inhibit the release of HMGB1 in mouse brain.
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BACKGROUND: This study aimed to analyze the protective effects of a saponin extract from Radix Pseudostellariae (RP) on retinal laser injury based on a retinal photocoagulation model. METHODS: Fifty-eight rabbits were randomly divided into three groups: Group A (saponin extract orally), Group B (physiological saline), and Group C (control). The animals were sacrificed 1 day, 7 days, 14 days, and 30 days after photocoagulation and lesions were evaluated with fundus photography, light microscopy, and electron microscopy. Superoxide dismutase (SOD) and malondialdehyde (MDA) levels were measured, and expression levels of c-fos and Bax genes were also determined. RESULTS: The lesion sizes in Group A were smaller than in Group B. The levels of SOD in Group B were significantly lower than in groups A and C (P<0.001) at all time points. The MDA levels were significantly lower than in groups B and C (P<0.001) at the 1 month point, while the apoptosis rate of Group A was significantly lower than that of Group B at all time points. The expression levels of the c-fos gene in Group B were significantly higher than that in groups A and C, and expression levels of the Bax gene in Group A were significantly lower than that in groups B and C. CONCLUSION: The saponin extract of RP can inhibit oxidative stress, downregulate the levels of c-fos and Bax gene expression, and inhibit apoptosis in the retina after photocoagulation.
Assuntos
Caryophyllaceae/química , Extratos Vegetais/farmacologia , Substâncias Protetoras/farmacologia , Lesões Experimentais por Radiação/prevenção & controle , Retina/efeitos dos fármacos , Animais , Apoptose/efeitos dos fármacos , Apoptose/efeitos da radiação , Feminino , Expressão Gênica/efeitos dos fármacos , Expressão Gênica/efeitos da radiação , Fotocoagulação a Laser/efeitos adversos , Masculino , Malondialdeído/metabolismo , Oftalmoscópios , Fitoterapia/métodos , Proteínas Proto-Oncogênicas c-fos/genética , Coelhos , Lesões Experimentais por Radiação/etiologia , Distribuição Aleatória , Retina/lesões , Retina/metabolismo , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Superóxido Dismutase/metabolismo , Fatores de Tempo , Proteína X Associada a bcl-2/genéticaRESUMO
Objective To establish a quality control for Tianmatoufengling Capsule. Methods HPLC method was taken for the determination of Gastrodine in Tianmatoufengling Capsule,A Kromasil C18 column was used,with methanol 0.05% Calcium phosphace(2.5∶97.5) as the mobile phase,and its flow rate was 1.0 mL/min. The detection wavelength was 220 nm. TLC method was used for the identification of Tianmatoufengling Capsule. Results Under the used chromatographic condition,Tianmatoufengling had fine linear responses(r =0.999 9) in the concentration range of 6.016～96.256 ?g/mL,the average recovery was 100.02%,RSD was 2.24%. The method used in TLC-qualitative analysis was simple and sensitive with high specificity,four ingredients identified in Tianmatoufengling Capsule could be detected and all showed specific spots. Conclusion The method employed in this study was convenient and reliable with good repetition. It can be used for quality control in production of Tianmatoufengling Capsule.
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Objective To establish a HPLC method for determination of hypoxanthine and xanthine in Syngnathus.Methods A Lichrosper C_(18) Column was used.The mobile phase was methanol-0.1%HAc.Walvelength was 254nm.Results The linear range of hypoxanthine was within 5.91～94.56?g?mL~(-1),r=0.9999,sample recovery rate was 99.22%,RSD=(1.25)%.The linear range of Xanthine was within 2.04~32.64?g?mL~(-1),r=0.9998,sample recovery rate was 98.05%,RSD=1.21%.Conclusion This method has good repeatability and flexibility.It can be used for quality control in production of Syngnathus.
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Objective To optimize the preparation process for Fangji Huangqi Granules. Methods With the extraction rates of tetrandrine, fanchinoline, astragaloside Ⅳand solid as the parameters, the extract conditions of Fangji Huangqi Granules were optimized by orthogonal design . Then the anti-inflammation effect of the extracts was observed on the mice and rats. Results The optimal preparation process was as follows:the mixture of medical materials was firstly refluxed twice with total 10 times of 70 %alcohol,1.5 hours for each time, and then extracted twice with total 12 times of boiling water ,1.5 hours for each time. The anti-inflammation effect of the extracts was obvious on the mice and rats. Conclusion The optimal preparation process is reasonable and with high extraction rate of active components.
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AIM:To establish an HPLC method for determining geniposide and liquiritin in Zhizi Baipi Decoction(Fructus Gardeniae,Cortex Phellodendri Chinensis,Radix et Rhizoma Glycyrrhizae). METHODS: A Kromasil C_(18) Column(4.6 mm?250 mm,5 ?m) was used.The mobile phase was methanol-0.5% glacial acetic acid for gradient elution.The flow rate was 1.0 mL/min,?_1=238 nm(detect the geniposide),?_2=276 nm(detect the liquiritin).The column temperature was at 30 ℃. RESULTS: The linear range of geniposide was within 49.1 ?g/mL-147.4 ?g/mL,r=(0.999 8),the recovery was(99.40%)(n=9).The linear range of liquiritin was within 6.1 ?g/mL-18.4 ?g/mL,r=(0.999 9),the recovery was 99.94%(n=9). CONCLUSION: This method has good reproducibility.It can be used for quality control in the production of Zhizi Baipi Decoction.
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AIM: To establish a HPLC for determination of baicalin and emodin in Yiqing Capsule(Radix Scutellarial, Radix et Rhizoma Rhei). METHODS:A Kromasil C_(18) Column was used. The mobile phase was methanol -0.2% phosphoric acid for gradient elution. Baicalin and emodin were determined by dual wavelength, ?_1=315 nm, ?_2=266 nm. RESULTS:The linear range of baicalin was within 64.40-322.00 ?g?mL~(-1) (r=(0.999 8)). The average recovery was 99.96%,RSD was 1.57%(n=9). The linear range of emodin was within( 0.82)-13.20 ?g?mL~(-1)(r=0.999 9).The average revovery was 98.90%, RSD was 1.25%(n=9). CONCLUSION: This method has good repeatability and flexibility. It can be used for quality control in production of Yiqing Capsule. (Nan
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AIM: To establish a HPLC for determination of puerarin and baicalin in Gegen Qinlian Micropill. METHODS: A Kromasil C 18 Column was used. The mobile phase was methanol-0.2% phosphoric acid. Puerarin and baicalin were determined by dual wavelength, ? 1=250nm. ? 2=315nm. RESULTS: The linear range of puerarin was within 32.0 ng—288.0 ng,r=0.9998 and the sample recovery was 100.17 % (RSD=1.00%(n=9)). The linear range of baicalin was within 52.6 ng～447.1 ng, r=0.9999 and the sample recovery was 100.06 % (RSD=1.06% (n=9)). CONCLUSION: This method has good repeatability and flexibility. It can be used for quality control of Gegen Qinlian Micropill.
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AIM: To establish a HPLC method for determination of puerarin and paeoniflorin in Jingfukang Granules(Radix Puerariae, Radix Paeoniae Alba, etc.). METHODS: A Kromasil C 18 Column was used. The mobile phase was methanol water. Puerarin and paeoniflorin were determined by HPLC(dual wavelength, ? 1=250nm,? 2=230nm). RESULTS: The linear range of puerarin was within 99.6ng～996.0ng, r =0.9998, sample recovery was 100.69%, RSD =1.04%( n =9), respectively. The linear range of paeoniflorin was within 119.6ng～ 1315.6 ng, r =0.9999, sample recovery was 100.30%, RSD =1.24%( n =9), respectively. CONCLUSION: This method is simple, reliable and has good repeatability. It can be used for quality control of Jingfukang Granules in production.
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Objective: To establish a HPLC method for the determination of liquiritin、 liquiritigenin and iso liquiritigenin in Licorice Mixture.Methods: A Cromasil C 18 column was used. the mobile phase was methanol 0.5% acetic acid for gradient elution. Liquiritin、 liquiritigenin and iso liquiritigenin were determined by dual wavelength, ? 1=276 nm,? 2=372 nm.Results: The linear range of liquiritin was 50.0～1250.0ng, r= 0.9999; The average recovery was 98.30%, RSD =1.01%( n= 6). The linear range of liquiritigenin was 5.0～125.0 ng, r= 0.9998; The average recovery was 98.01%, RSD =0.68%( n= 6). The linear range of iso liquiritigenin was 3.0～6.0 ng, r= 0.9999. The average recovery was 98.37%, RSD= 0.89%( n= 6). Conclusion: This method is convenient, rapid and accurate. It can be used for quality control in production of Licorice Mixture.
