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Objective To investigate the protective effect of geniposide against diabetic rats with skin ulcer and the mechanism.Methods Rats were divided into a normal group,model group,and geniposide subgroups(Gen(L):200 mg/kg;Gen(H):500 mg/kg).Diabetic rats were treated with normal saline or geniposide by intragastric administration(n=6).Treatments were administered once a day,and the wound healing and inflammation of each group were recorded every day.After 7 days of treatment for diabetic skin ulcers,the wound area,tissue sections,TUNEL staining and Western blot were used to quantitatively analyze changes in wound healing,apoptosis,and related regulatory protein expression.Results Compared with the model group,the group receiving orally administered geniposide(200 and 500 mg/kg)showed significantly improved wound healing and increased contraction of the injured area.In terms of skin wound apoptosis in diabetic rats,TUNEL-positive cells were significantly reduced in geniposide subgroups(P<0.05).Geniposide significantly inhibited skin inflammation and promoted wound repair,which may be related to promotion of PI3K and Akt phosphorylation.Conclusions Geniposide promoted skin wound repair in diabetic rats by inhibiting inflammatory responses and apoptosis.
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OBJECTIVE:To establish a method for rapid identification and efficient preparation of main ingredients in effective parts of Xinjiang Artemisia rupestris,and provide reference for researching the ethnic medicines. METHODS:LC-HRMS/MS was conducted for the preliminary study of main ingredients in effective parts of A. rupestris. HPLC,UV and MS were used to compare and analyze parts of the compounds and its reference substances,their names were determined. Column separation and preparative liquid chromatography were used for the undetermined compounds to receive monomer rapidly,and the structures were identified. RESULTS:5 compounds were separated from the effective parts,2 of which were identified as artemetin and casticin. A monomer-ic compound was obtained (yield was 0.35 mg/g,the purity was 98.5%),which was confirmed to be 6-demethoxy-4′-O-me-thoxy-capillarisin-7-O-β-D-glucoside by the structure. CONCLUSIONS:The method has achieved rapid separation,identification and preparation of target ingredients,which can be used for the fundamental research of ethnic medicine complex materials.
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Objective To investigate the optimal process conditions for the separation and purification of extract from Hyssopus cuspidatus Boriss. by polyamide resins. Methods The total flavonoids and rosmarinic acid were used as the indexes. The maximum amount of sample solution, elution volume, concentration of sample solution, adsorption time of resin, loading time of sample solution and the amount of eluting solvent, pH and elution rate in the resin purification process were screened by single factor method. Results The optimal purification parameters were as follows: 10 mg/mL of extract, 12 mL of sample amount, 2 BV of water to remove impurities, 40% ethanol to elute 9 BV; the concentration of rosmarinic acid in sample solution was 86.3 μg/mL, and the total flavonoid concentration was 117.8 μg/mL; the resin adsorption time was 14 h; the pH of sample solution was 6.5; the elution rate was 3.0 BV/h. Conclusion This method is simple and feasible, fit for separating and purifying of extract from Hyssopus cuspidatus Boriss.