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- 저자 : Yuanlin Ding (검색결과 2 건)
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Composition and Antioxidant Activity of Water-Soluble Polysaccharides from Tuber indicum
Qiang Luo,Jie Zhang,Liang Yan,Yuanlin Tang,Xiang Ding,Zhirong Yang,Qun Sun 한국식품영양과학회 2011 Journal of medicinal food Vol.14 No.12
Crude water-soluble Chinese truffle Tuber indicum polysaccharide (TIP) was extracted from the fruiting bodies with water and then successively purified by DEAE–cellulose 52 and Sephadex G-100 column chromatography,yielding two major polysaccharide fractions: TIP1-1 and TIP2-1. High-performance gel permeation chromatography analysis showed that the average molecular sizes of TIP1-1 and TIP2-1 were approximately 1.75×10⁴Da and 5.73×10³ Da, respectively. Monosaccharide component analysis by gas chromatography indicated that TIP1-1 was composed of mannose,glucose, galactose, and rhamannose in the respective molar ratio of 3.93:1.24:0.75:1.26 and that TIP2-1 contained mannose,glucose, and arabinose in the respective molar ratio of 5.27:1.44:0.43. The antioxidant activity analyses revealed that TIP1-1and TIP2-1 possessed considerable antioxidant activity. Compared with TIP1-1, which has a higher molecular weight and contains no uronic acid, TIP2-1 exhibited a protective effect on PC12 cells injured by H₂O₂and a higher scavenging activity against free radicals. The relative effects of the lower molecular size, the presence of uronic acid, and the antioxidant activity of TIP2-1 appear to be significant. Accordingly, the Chinese truffle T. indicum might serve as an effective antioxidative healthcare food and source of natural antioxidants.
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Impact of Older Age Adiposity on Incident Diabetes: A Community-Based Cohort Study in China
Anthony Chen,Weiju Zhou,Jian Hou,Alan Nevill,Yuanlin Ding,Yuhui Wan,Rebecca Jester,Xia Qin,Zhi Hu,Ruoling Chen 대한당뇨병학회 2022 Diabetes and Metabolism Journal Vol.46 No.5
Background: Obesity classifications vary globally and the impact of older age adiposity on incident diabetes has not been well-studied.Methods: We examined a random sample of 2,809 participants aged ≥60 years in China, who were free of diabetes at baseline and were followed up for up to 10 years to document diabetes (<i>n</i>=178). The incidence of diabetes was assessed in relation to different cut-off points of body mass index (BMI) and waist circumference (WC) in multiple adjusted Cox regression models.Results: The diabetic risk in the cohort increased linearly with the continuous and quartile variables of BMI and WC. The BMI-World Health Organization (WHO) and BMI-China criteria analysis did not show such a linear relationship, however, the BMI-Asian/Hong Kong criteria did; adjusted hazards ratio (HR) was 0.42 (95% confidence interval [CI], 0.20 to 0.90) in BMI <20 kg/m<sup>2</sup>, 1.46 (95% CI, 0.99 to 2.14) in 23–≤26 kg/m<sup>2</sup>, and 1.63 (95% CI, 1.09 to 2.45) in ≥26 kg/m<sup>2</sup>. The WC-China criteria revealed a slightly better prediction of diabetes (adjusted HRs were 1.79 [95% CI, 1.21 to 2.66] and 1.87 [95% CI, 1.22 to 2.88] in central obese action levels 1 and 2) than the WC-WHO. The combination of the BMI-Asian/Hong Kong with WC-China demonstrated the strongest prediction. There were no gender differences in the impact of adiposity on diabetes.Conclusion: In older Chinese, BMI-Asian/Hong Kong criteria is a better predictor of diabetes than other BMI criterion. Its combination with WC-China improved the prediction of adiposity to diabetes, which would help manage bodyweight in older age to reduce the risk of diabetes.
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