The crude extracts of jasmine tea showed free radicals scavenging activities. Various active ingredients found in jasmine tea such as flavonoids, polysaccharides, and essential oils have antioxidant, anti-microbial, anti-neoplastic, anti-diabetic, and regulating immunological properties according to extensive studies. sambac processed products in the food industry. sambac, accounting for approximately 80% of the whole J. Jasmine tea is the major value-added processed product of J. sambac is a well-known medicinal plant that appears in over 30% of traditional Chinese Medicine and folk medicine formulas for anti-inflammatory, anti-hyperlipidemic, anti-diabetic, anti-depressant, and analgesic treatments as well as wound healing. Jasminum sambac (L.) Aiton is mainly cultivated in tropical regions in Asia and warm temperate regions in Europe and Africa for their attraction and delightfully fragrant blossoms.
The genus Jasminum belonging to the Oleaceae family is a kind of bulb flower with high potentials. The particular bioactivity of polysaccharides is linked to structural properties such as molecular weight, monosaccharide content, functional group and three-dimensional conformation, as well as glycosidic linkage.
Nowadays, many edible and medicinal polysaccharides attract attention based on their special physico-chemical properties and physiological functions, including antioxidant and hypoglycemic activities. Thus, protecting the islet cells from oxidative stress appears to be a crucial factor to lower blood glucose and successfully prevent diabetes. The high concentration of free radicals induced by chronic hyperglycemia can damage biological macromolecules in the islet cells and the pancreatic tissues, increasing the risk of diabetes. These results open up new pharmacological prospects for the water-soluble polysaccharides extracted from jasmine tea.ĭiabetes mellitus, as the third most life-threatening illnesses worldwide, is a syndrome of endocrine metabolic disorder characterized by sustained hyperglycemia. JSP-1 was made up of glucose, galactose, rhamnose, xylose, arabinose, and galacturonic acid with molar ratios 1.14:4.69:1.00:9.92:13.79:4.09, whereas JSP-2 with a triple helical structure was composed of galactose, rhamnose, xylose, arabinose, and galacturonic acid as 3.80:1.00:8.27:11.85:5.05 of molar ratios. The molecular weights of JSP-1 and JSP-2 were 18.4 kDa and 14.1 kDa, respectively. JSP-1 exhibited better antioxidant and hypoglycemic activities than JSP-2. Physiologically, the abilities of JSP-1 and JSP-2 to reduce ferric ions, scavenge DPPH and hydroxyl radicals, as well as protect islet cells were confirmed in vitro. The main structural characteristics of novel JSP sub-fractions were determined by high performance gel permeation chromatography, ultra-performance liquid chromatography-tandem mass spectrometry, Fourier transform infrared, and nuclear magnetic resonance analysis.
In this study, water-soluble polysaccharides (named as JSP) were extracted from Jasminum sambac (L.) Aiton tea and fractionated to afford two sub-fractions (JSP-1 and JSP-2). There have been few studies dealing with chemical elucidation and pharmacological potentials of water-soluble polysaccharides from jasmine tea, limiting their use in functional foods.
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