Abstract
The study was designed to investigate the chemical composition and antioxidant activities of polysaccharides from Yingshan Cloud Mist Tea. The chemical composition of green tea polysaccharides (GTPS) was analyzed by Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscope (SEM), thermogravimetric (TGA), gas chromatograph (GC), and high-performance gel-permeation chromatography (HPGPC). Then, the antioxidant activities in vitro of GTPS, effects of GTPS on body weight, and the antioxidant activities in chickens were studied. The results showed that GTPS were composed of rhamnose (Rha), arabinose (Ara), xylose (Xyl), mannose (Man), glucose (Glu), and galactose (Gal) in a molar ratio of 11.4 : 26.1 : 1.9 : 3.0 : 30.7 : 26.8 and the average molecular weight was 9.69 × 104 Da. Furthermore, GTPS exhibited obvious capacity of scavenging DPPH radical, hydroxyl radical, and superoxide radical and enhanced the ferric-reducing power in vitro. Last, GTPS significantly increased the body weight of chickens, enhanced the T-AOC, SOD, and GSH-Px level, and decreased the content of MDA in chickens. The results indicated that GTPS might be a kind of natural antioxidant, which had the potential application in feed industry.
Highlights
Oxidative stress and its negative effects on animal body health have become an important topic in recent decades
Wang et al studied the antioxidant activity and α-glucosidase inhibitory effect of polysaccharides from three Oolong teas; the results indicated that a higher content of protein and uronic acid could result in higher antioxidant activities [35]
Li et al investigated the antioxidant activities in vivo of watersoluble polysaccharides from Ostrea rivularis (ORPs), and the results indicated that ORPs significantly raised the level of total antioxidant capacity (T-AOC), reduced the formation of MDA, and enhanced the activities of superoxide dismutase (SOD) and GSH-Px [45]
Summary
Oxidative stress and its negative effects on animal body health have become an important topic in recent decades. The generation of reactive oxygen species (ROS) will result in the homeostatic imbalance when organisms are exposed to exogenous and endogenous factors [1]. In order to reduce the oxidative damage of ROS, many synthetic antioxidants have been used widely nowadays. Many reports suggest that synthetic antioxidants should be restricted due to the suspicions on carcinogenic effects related to health [3]. Natural polysaccharides are capable of preventing oxidative damage in human and animal bodies from scavenging free radicals, which are widely distributed in animals, plants, and microorganisms [4]. There is growing attention to investigations focusing on the natural polysaccharides since a lot of data indicated that plant polysaccharides in general have strong antioxidant activities [5]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
