Kiwi fruit extract and extraction method and application thereof
The technology of kiwi fruit and extract is applied in the application field of preparing hypoglycemic drugs, and can solve the problems of insignificant effect and the like
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Embodiment 1
[0021] The kiwi fruit extract of this example is extracted by the following method. Take fresh kiwi fruit with skin, chop it, heat it with methanol at 70°C and extract it twice under reflux, for 2 hours and 1 hour in turn. The two extracts are combined, filtered, and concentrated The total methanol extract of kiwifruit is obtained, and the total extract is sequentially extracted with petroleum ether, ethyl acetate and n-butanol, filtered under reduced pressure, and concentrated to obtain kiwifruit petroleum ether extraction parts, ethyl acetate extraction parts and n-butanol extraction parts.
[0022] The yields of kiwifruit extract parts in different solvents are shown in Table 1.
Embodiment 2
[0024] This example is an in vitro α-glucosidase inhibitory activity test of kiwi fruit extract
[0025] Method: 96 microplate method
[0026]Principle: α-D-glucosidase catalyzes the hydrolysis of 4-nitrobenzene-α-D-glucopyranoside (PNP-G) to produce nitrophenol (PNP, yellow substance with maximum absorption at 405nm), α -Glucosidase inhibitors can inhibit the combination of α-glucosidase and substrates to reduce the release of PNP. The enzyme inhibitory activity of the extraction site was calculated by the change of PNP content in the reaction system within a certain period of time.
[0027] Instruments: LRH-150 constant temperature incubator (Shanghai Yiheng Technology Co., Ltd.); DELTA 320 pH meter (Mettler-Toledo, USA); Multiskan MK3 microplate reader (Thermo Electron, USA); electronic balance (Mettler-Toledo, USA) ); rotary evaporator (Heidolph, Germany).
[0028] Reagent: α-glucosidase (α-glucosidase, EC 3.2.1.20) and 4-nitrophenyl-α-D-glucopyranoside (4-N-trophenyl-α...
Embodiment 3
[0042] This example is an in vivo hypoglycemic test of the extracted part of kiwi fruit in diabetes.
[0043] Experimental animal materials: male Kunming mice, weighing 22±2g.
[0044] Main instruments: UV-2000 UV-Vis spectrophotometer (Shanghai Unocal Instrument Co., Ltd.); Multiskan MK3 microplate reader (Thermo Electron, USA); LRH-150 constant temperature incubator (Shanghai Yiheng Technology Co., Ltd.); Balance (Mettler-Toledo Company, USA); Rotary Evaporator (Heidolph Company, Germany); CS-H1 Mixer (Beijing Boliyang Technology Company); trace amounts of various specifications.
[0045] Main Reagents: Glucose Determination Kit (Shanghai Rongsheng Bio-Pharmaceutical Co., Ltd., 20110901); Triglyceride (TG) Determination Kit (Zhejiang Dongou Diagnostic Products Co., Ltd., Lot: 2011090034); Total Cholesterol (TCH) Determination Reagent Box (Zhejiang Dongou Diagnostic Products Co., Ltd., Lot: 201100025); liver / muscle glycogen determination kit (Nanjing Jiancheng Bioengineering...
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