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Structure characterization of an arabinogalactan from green tea and its anti-diabetic effect

Wang, Huijun ; Shi, Songshan ; Bao, Bin ; Li, Xiaojun ; Wang, Shunchun

Carbohydrate Polymers, 25 June 2015, Vol.124, pp.98-108 [Peer Reviewed Journal]

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  • Title:
    Structure characterization of an arabinogalactan from green tea and its anti-diabetic effect
  • Author: Wang, Huijun ; Shi, Songshan ; Bao, Bin ; Li, Xiaojun ; Wang, Shunchun
  • Description: •A water soluble neutral polysaccharide (7WA) was prepared from the leaves of green tea.•7WA was fully characterized as a type II arabinogalactan with some novel structural features.•7WA significantly augmented glucose-stimulated insulin secretion (GSIS) at high glucose level.•7WA augmented GSIS by cAMP-PKA pathway. A water-soluble polysaccharide, 7WA, with an average molecular mass of 7.1×104Da, was isolated from the leaves of green tea. Monosaccharide composition analysis indicated that 7WA mainly contained Arabinose and Galactose in the molar ratio of 1.0:0.96. By using the methods of methylation analysis, partial hydrolysis, and NMR, 7WA was characterized to possess a backbone consisting of 1,3- and 1,6-linked galactopyranosyl residues, with branches attached to O-3 of 1,6-linked galactose residues, and O-4 and O-6 of 1,3-linked galactose residues. The results of glucose-stimulated insulin secretion (GSIS) showed that 7WA significantly augmented insulin...
  • Is Part Of: Carbohydrate Polymers, 25 June 2015, Vol.124, pp.98-108
  • Identifier: ISSN: 0144-8617 ; E-ISSN: 1879-1344 ; DOI: 10.1016/j.carbpol.2015.01.070
  • Subjects: Camellia Sinensis ; Green Tea ; Arabinogalactan ; Glucose-Stimulated Insulin Secretion (Gsis) ; Camp-Pka Pathway ; Anti-Diabetic ; Camellia Sinensis ; Green Tea ; Arabinogalactan ; Glucose-Stimulated Insulin Secretion (Gsis) ; Camp-Pka Pathway ; Anti-Diabetic ; Chemistry
  • Language: English

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