Chemical composition and antioxidant/antimicrobial activities in supercritical carbon dioxide fluid extract of Gloiopeltis tenax.
Gloiopeltis tenax (G. tenax) is widely distributed along the Chinese coastal areas and is commonly used in the treatment of diarrhea and colitis. This study aimed at investigating the bioactivities of the volatile constituents in G. tenax. We extracted the essential constituents of G. tenax by supercritical carbon dioxide extraction (CO₂-SFE), then identified and analyzed the constituents by gas chromatography-mass spectrometry (GC-MS). In total, 30 components were identified in the G. tenax extract. The components showed remarkable antioxidant activity (radical scavenging activity of 2,2-diphenyl-1-picrylhydrazyl (DPPH)), lipid peroxidation inhibition capacity (in a β-carotene/linoleic acid-coupled oxidation reaction), and hydroxyl radical-scavenging activity (by deoxyribose degradation by iron-dependent hydroxyl radical), compared to butylated hydroxytoluene. In microdilution assays, G. tenax extracts showed a moderate inhibitory effects on Staphyloccocus aureus (minimum inhibitory concentration (MIC) = 3.9 mg/mL), Enterococcus faecalis (7.8 mg/mL), Pseudomonas aeruginosa (15.6 mg/mL), and Escherichia coli (3.9 mg/mL). Antioxidant and antimicrobial activities of G. tenax were related to the active chemical composition. These results suggest that the CO₂-SFE extract from G. tenax has potential to be used as a natural antioxidant and antimicrobial agent in food processing.
Department of Pharmacology, Shantou University Medical College, Shantou 515041, China.
Jiaojiao
J
Zheng
Yicun
Y
Chen
Fen
F
Yao
Weizhou
W
Chen
Ganggang
G
Shi
D000900:Anti-Bacterial Agents / Q000302:isolation & purification / Q000494:pharmacology*; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects*; D002245:Carbon Dioxide; D025924:Chromatography, Supercritical Fluid / Q000379:methods; D008401:Gas Chromatography-Mass Spectrometry; D015227:Lipid Peroxidation / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D000461:Rhodophyta / Q000737:chemistry*
D000900:Anti-Bacterial Agents; D000975:Antioxidants; D002245:Carbon Dioxide