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Isolation, chemical characterization and antioxidant activities of two polysaccharides from the gel and the skin of Aloe barbadensis Miller irrigated with sea water

Paper ID Volume ID Publish Year Pages File Format Full-Text
35881 45112 2007 10 PDF Available
Title
Isolation, chemical characterization and antioxidant activities of two polysaccharides from the gel and the skin of Aloe barbadensis Miller irrigated with sea water
Abstract

Two polysaccharides, GAPS-1 and SAPS-1, were isolated from the gel and the skin of Aloe barbadensis Miller irrigated with sea water for 3.5 years through a combination of anion-exchange column chromatography and repeated gel chromatography and their chemical characterization and antioxidant activities in vitro were investigated. GAPS-1 and SAPS-1 were composed of Man:Glc:Gal in a ratio of 120:2:3 and 296:36:1 with their molecular weight 1.74 × 105 and 3.97 × 104 Da, respectively. IR and 13C NMR study of GAPS-1 and SAPS-1 demonstrated that the main skeletons of GAPS-1 was β-(1 → 4)-D linkaged mannose with acetylation at C-6 and C-3 of manopyranosyl and SAPS-1 was β-(1 → 4)-D linkaged galactoglucomannan with acetylation at C-6 of pyranosyl. In a concentration-dependent manner, GAPS-1 and SAPS-1 were demonstrated to have strong scavenging activities against superoxide radical, moderate ferrous chelating effect, moderate scavenging activities of hydroxyl radical, moderate reductive power and moderate inhibition of lipid peroxidation. Furthermore, GAPS-1 exhibited moderate scavenging activity of hydrogen peroxide, while SAPS-1 exhibited weak scavenging activity of hydrogen peroxide. GAPS-1 demonstrated more effective antioxidant activities than SAPS-1. The more acetyl group in GAPS-1 molecules probably contributes to the activities.

Keywords
Aloe barbadensis Miller; Sea water irrigation; Polysaccharide; Antioxidant activities; Free radicals
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Isolation, chemical characterization and antioxidant activities of two polysaccharides from the gel and the skin of Aloe barbadensis Miller irrigated with sea water
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 6, June 2007, Pages 961–970
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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