scholarly journals Corrigendum to “Sulfation of tea polysaccharides: Synthesis, characterization and hypoglycemic activity” [Int. J. Biol. Macromol. 46 (2010) 270–274]

2021 ◽  
Author(s):  
Yuanfeng Wang ◽  
Yonghua Peng ◽  
Xinlin Wei ◽  
Zhiwei Yang ◽  
Jianbo Xiao ◽  
...  
Keyword(s):  
Hypoglycemic Activity ◽  
Tea Polysaccharides

Sulfation of tea polysaccharides: Synthesis, characterization and hypoglycemic activity

2010 ◽  
Vol 46 (2) ◽  
pp. 270-274 ◽  
Author(s):  
Yuanfeng Wang ◽  
Yonghua Peng ◽  
Xinlin Wei ◽  
Zhiwei Yang ◽  
Jianbo Xiao ◽  
...  
Keyword(s):  
Hypoglycemic Activity ◽  
Tea Polysaccharides

scholarly journals Valorization of Polysaccharides Obtained from Dark Tea: Preparation, Physicochemical, Antioxidant, and Hypoglycemic Properties

Foods ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2276
Author(s):  
Jiangxiong Zhu ◽  
Hui Zhou ◽  
Junyao Zhang ◽  
Fanglan Li ◽  
Kang Wei ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Correlation Analysis ◽  
Uronic Acid ◽  
Functional Foods ◽  
Structural Characteristics ◽  
Biological Properties ◽  
Hypoglycemic Activity ◽  
Uronic Acid Content ◽  
Tea Polysaccharides

The structure and hypoglycemic activity of tea polysaccharides has been extensively studied, while there are few reports on the characterization and hypoglycemic activity of dark tea polysaccharides. The crude dark tea polysaccharide (CDTPS) was optimally extracted from Fuzhuan dark tea. Six polysaccharide fractions (namely DTPS-1, DTPS-2, DTPS-3, DTPS-4, DTPS-5, and DTPS-6) were isolated from CDTPS, and their physicochemical, structural, and biological properties were compared and analyzed. The results revealed that the compositions, structural characteristics, and biological properties of the six DTPSs were different. Therein, DTPS-4 and DTPS-6 had looser morphology, faster solubility, and a more stable structure. Additionally, DTPS-4 had the optimum in vitro antioxidant capabilities, and DTPS-6 had the strongest in vitro hypoglycemic capabilities. In addition, a correlation analysis revealed that the molecular weight and uronic acid content were significantly related to their antioxidant and hypoglycemic activities. Our results indicated that DTPS-4 and DTPS-6 could be further developed into functional foods or additives, respectively.

Synthesis and hypoglycemic activity of esterified-derivatives of mangiferin

2014 ◽  
Vol 11 (3) ◽  
pp. 296-301 ◽  
Author(s):  
Xue-Jian LI ◽  
Zheng-Cai DU ◽  
Yan HUANG ◽  
Bu-Ming LIU ◽  
Wen-Ji HU ◽  
...  
Keyword(s):  
Hypoglycemic Activity ◽  
Derivatives Of

Comparison of Hypoglycemic and Antioxidant Activities of the Compounds Isolated from Ficus hispida Linn. and Ficus pomifera Wall

2020 ◽  
Vol 10 (5) ◽  
pp. 621-630
Author(s):  
Ashalata Nepram ◽  
Sujata Wangkheirakpam ◽  
Warjeet S. Laitonjam
Keyword(s):  
Methanol Extract ◽  
Antioxidant Activities ◽  
Tolerance Test ◽  
Chloroform Extract ◽  
Diabetic Rats ◽  
Hypoglycemic Activity ◽  
North East India ◽  
North East ◽  
Dpph Method ◽  
Ficus Hispida

Background: Traditional knowledge has been a legacy of the past to the present. Barks of Ficus hispida Linn. and leaves of Ficus pomifera Wall. (Moraceae) have been used traditionally for the treatment of diabetes in North-east India and many other places. As many drugs have been developed from traditional plants, the authors have taken up the plants for the study of hypoglycemic activity. Objective: To investigate the hypoglycemic activities of the triterpenoids isolated from the plants and their antioxidant activities. Methods: The bioactive compounds were determined by biochemical analysis, antioxidant activity using DPPH method. Hypoglycemic activity was detected using glucose tolerance test in normal rats and alloxan induced diabetic rats with Gliclazide as standard. Results: The biochemicals and trace elements were present in appreciable amounts. Triterpenoids, (1-5), from F. pomifera and 19-hydroxyphlogacantholide (6), 3-O-[ß-D-glucopyranosyl-(1’→2’)-α- L-rhamnopyranosyl-phlogacanthoside] (7) and galanolactone (8) along with stigmasterol (9), stigmasta- 5,22-dien-7-on-3ß-ol (10), 5-(decahydro-1,1,4a-trimethyl-6-methylene-5-yl)-3-methylpent-2- enal (11), stigmasterol glucoside (12) and stigmast-4-en-3-one (13) from F. hispida Linn., respectively, were isolated. The different extracts of the barks and leaves of these plants along with the isolated compounds had antioxidant and hyploglycemic activities. Conclusions: The five triterpenoids (1-5) were isolated from the methanol extract of the leaves of F. pomifera, and compounds (6-13) were isolated from the chloroform extract of the barks of F. hispida. Methanol extract of the leaves of F. pomifera and the chloroform extract of the barks of F. hispida; compounds (1-13) isolated from these two plants reduced DPPH free radicals in a concentrationdependent manner. It was also observed that the methanol and chloroform extracts of the plants, F. pomifera and F. hispida respectively, and the compounds (1, 6 & 7) exhibited anti-diabetic properties and also caused a highly significant reduction in the blood glucose levels of normal rats.

scholarly journals Influencing Factors on the Physicochemical Characteristics of Tea Polysaccharides

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3457
Author(s):  
Ting Hu ◽  
Peng Wu ◽  
Jianfeng Zhan ◽  
Weixin Wang ◽  
Junfeng Shen ◽  
...  
Keyword(s):  
Influencing Factors ◽  
Biological Activities ◽  
Structural Difference ◽  
Physicochemical Characteristics ◽  
Bioactive Constituents ◽  
Preparation Methods ◽  
Processing Technologies ◽  
Chemical Structures ◽  
Tea Polysaccharides ◽  
Fine Structures

Tea polysaccharides (TPSs) are one of the main bioactive constituents of tea with various biological activities such as hypoglycemic effect, antioxidant, antitumor, and immunomodulatory. The bioactivities of TPSs are directly associated with their structures such as chemical composition, molecular weight, glycosidic linkages, and conformation among others. To study the relationship between the structures of TPSs and their bioactivities, it is essential to elucidate the structure of TPSs, particularly the fine structures. Due to the vast variation nature of monosaccharide units and their connections, the structure of TPSs is extremely complex, which is also affected by several major factors including tea species, processing technologies of tea and isolation methods of TPSs. As a result of the complexity, there are few studies on their fine structures and chain conformation. In the present review, we aim to provide a detailed summary of the multiple factors influencing the characteristics of TPS chemical structures such as variations of tea species, degree of fermentation, and preparation methods among others as well as their applications. The main aspects of understanding the structural difference of TPSs and influencing factors are to assist the study of the structure and bioactivity relationship and ultimately, to control the production of the targeted TPSs with the most desired biological activity.

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