Extraction and in vitro antioxidant activity of exopolysaccharide by Pleurotus eryngii SI-02
Braz. j. microbiol
;
44(4): 1081-1088, Oct.-Dec. 2013. graf, tab
Article
Dans Anglais
| LILACS
| ID: lil-705253
ABSTRACT
The extraction parameters for Pleurotus eryngii SI-02 exopolysaccharide (EPS) produced during submerged culture were optimized using response surface methodology (RSM). The optimum conditions for EPS extraction were predicted to be, precipitation time 20.24 h, ethanol concentration 89.62% and pH 8.17, and EPS production was estimated at 7.27 g/L. The actual yield of EPS under these conditions was 7.21 g/L. The in vitro antioxidant results of the EPS showed that the inhibition effects of EPS at a dosage of 400 mg/L on hydroxyl, superoxide anion and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals were 59.63 ± 3.72%, 38.69 ± 2.59%, and 66.36 ± 4.42%, respectively, which were 12.74 ± 1.03%, 8.01 ± 0.56%, and 12.19 ± 1.05% higher than that of butylated hydroxytoluene (BHT), respectively. The reducing power of EPS of P. eryngii SI-02 was 0.98 ± 0.05, 60.66 ± 5.14% higher than that of BHT. The results provide a reference for large-scale production of EPS by P. eryngii SI-02 in industrial fermentation and the EPS can be used as a potential antioxidant which enhances adaptive immune responses.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Polyosides
/
Pleurotus
/
Antioxydants
Type d'étude:
Étude pronostique
langue:
Anglais
Texte intégral:
Braz. j. microbiol
Thème du journal:
Microbiologie
Année:
2013
Type:
Article
/
descriptif de projet
Pays d'affiliation:
Chine
Institution/Pays d'affiliation:
Shandong Agricultural University/CN
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