Antioxidant activities and functional properties of grass carp (Ctenopharyngodon idellus ) protein hydrolysates

2011 ◽  
Vol 92 (2) ◽  
pp. 292-298 ◽  
Author(s):  
Xue Li ◽  
Yongkang Luo ◽  
Huixing Shen ◽  
Juan You
Keyword(s):  
Functional Properties ◽  
Grass Carp ◽  
Antioxidant Activities ◽  
Protein Hydrolysates ◽  
Ctenopharyngodon Idellus

Effects of Bacillus preparations on immunity and antioxidant activities in grass carp (Ctenopharyngodon idellus)

2012 ◽  
Vol 38 (6) ◽  
pp. 1585-1592 ◽  
Author(s):  
Li Weifen ◽  
Zhang Xiaoping ◽  
Song Wenhui ◽  
Deng Bin ◽  
Liang Quan ◽  
...  
Keyword(s):  
Grass Carp ◽  
Antioxidant Activities ◽  
Ctenopharyngodon Idellus

scholarly journals Dromedary Milk Protein Hydrolysates Show Enhanced Antioxidant and Functional Properties

2020 ◽  
Vol 58 (2) ◽  
pp. 147-158
Author(s):  
Olfa Oussaief ◽  
Zeineb Jrad ◽  
Isabelle Adt ◽  
Touhami Khorchani ◽  
Halima El-Hatmi
Keyword(s):  
Molecular Mass ◽  
Functional Properties ◽  
Milk Protein ◽  
Molecular Mass Distribution ◽  
Antioxidant Activities ◽  
Milk Proteins ◽  
Protein Hydrolysates ◽  
Rp Hplc ◽  
Dromedary Milk ◽  
Hydrolysis Of

Research background. Milk protein hydrolysates have received particular attention due to their health-promoting effects. Dromedary milk differs from the milk of other dairy animals in the composition and structure of its protein components, which give it unique properties. The bioactivity and functionality of whole dromedary milk proteins and their enzymatic hydrolysates have not received much attention, hence this study aims to investigate the effect of enzymatic hydrolysis of dromedary milk proteins on their antioxidant activities and functional properties. Experimental approach. Dromedary milk proteins were treated using four proteolytic enzymes (pepsin, trypsin, α-chymotrypsin and papain) and two mixtures of enzymes (pancreatin and pronase). The degree of hydrolysis was measured to verify the hydrolysis of the proteins. The sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and gel filtration chromatography served to determine the molecular mass distribution of the hydrolysates while reversed phase-high performance liquid chromatography (RP-HPLC) was conducted to explore their hydrophobicity. The antioxidant activities were evaluated using various in vitro tests, including 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging capacities, iron(III) reducing ability and chelating activity. Besides, functional properties such as solubility, foaming and emulsification were assessed. Results and conclusions. Dromedary milk protein hydrolysates exhibited different degrees of hydrolysis ranging from 17.69 to 41.86 %. Apart from that, the hydrolysates showed different electrophoretic patterns, molecular mass distribution and RP-HPLC profiles demonstrating the heterogeneity of the resulting peptides in terms of molecular mass and polarity. The hydrolysates displayed significantly higher antioxidant capacities than the undigested proteins at all the tested concentrations. Iron(II) chelating activity was the most improved assay after proteolysis and the hydrolysate generated with pancreatin had the highest chelating power. Dromedary milk protein hydrolysates possessed good solubility (>89 %). Further, foaming and emulsifying properties of dromedary milk proteins were enhanced after their proteolysis. These interfacial properties were influenced by the enzymes employed during proteolysis. Novelty and scientific contribution. Enzymatic hydrolysis of dromedary milk proteins is an effective tool to obtain protein hydrolysates with great antioxidant and functional properties. These results suggest that dromedary milk protein hydrolysates could be used as a natural source of antioxidant peptides to formulate functional foods and nutraceuticals.

Lycopene alleviates sulfamethoxazole-induced hepatotoxicity in grass carp (Ctenopharyngodon idellus) via suppression of oxidative stress, inflammation and apoptosis

2020 ◽  
Vol 11 (10) ◽  
pp. 8547-8559
Author(s):  
Hongjing Zhao ◽  
Yu Wang ◽  
Mengyao Mu ◽  
Menghao Guo ◽  
Hongxian Yu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Secondary Metabolites ◽  
Human Health ◽  
Grass Carp ◽  
Aquatic Environment ◽  
Ctenopharyngodon Idellus

Antibiotics are used worldwide to treat diseases in humans and other animals; most of them and their secondary metabolites are discharged into the aquatic environment, posing a serious threat to human health.

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