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Characterization of pumpkin polysaccharides and protective effects on streptozotocin-damaged islet cells / 中国天然药物
Chinese Journal of Natural Medicines (English Ed.) ; (6): 199-207, 2015.
Article in English | WPRIM | ID: wpr-812156
ABSTRACT
The polysaccharides from pumpkin fruit (PP) were obtained and purified by hot-water extraction, anion-exchange chromatography, and gel column chromatography. The physicochemical properties of PP were determined by gel filtration chromatography, gas chromatography, fourier transform infrared (FTIR) spectroscopy, and nuclear magnetic resonance (NMR) spectroscopy. Results indicated that the molecular weight of PP was about 23 kDa and PP was composed of D-Arabinose, D-Mannose, D-Glucose, and D-Galactose with a molar ratio of 1 7.79 70.32 7.05. FTIR and NMR spectra indicated that PP was the polysaccharide containing pyranose ring. Additionally, PP protected islets cells from streptozotocin (STZ) injury in vitro via increasing the levels of super-oxide dismutase (SOD) and malondialdehyde (MDA) and reducing the production of NO. The experiment of reverse transcriptase-polymerase chain reaction further proved that PP inhibited apoptosis via modulating the expression of Bax/Bcl-2 in STZ-damaged islet cells. In conclusion, PP could be explored as a novel agent for the treatment of diabetes mellitus.
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Full text: Available Index: WPRIM (Western Pacific) Main subject: Pharmacology / Polysaccharides / Superoxide Dismutase / Wounds and Injuries / Magnetic Resonance Spectroscopy / Chemistry / Chromatography, Gas / Chromatography, Gel / Islets of Langerhans / Rats, Sprague-Dawley Limits: Animals Language: English Journal: Chinese Journal of Natural Medicines (English Ed.) Year: 2015 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Pharmacology / Polysaccharides / Superoxide Dismutase / Wounds and Injuries / Magnetic Resonance Spectroscopy / Chemistry / Chromatography, Gas / Chromatography, Gel / Islets of Langerhans / Rats, Sprague-Dawley Limits: Animals Language: English Journal: Chinese Journal of Natural Medicines (English Ed.) Year: 2015 Type: Article