Taxonomic group: plant / Streptophyta
(Phylum: Streptophyta)
Organ / tissue: leaf
NCBI PubMed ID: 10956087Publication DOI: 10.1021/jf0001637Journal NLM ID: 0374755Publisher: American Chemical Society
Correspondence: ddkitts
interchange.ubc.ca
Institutions: Food, Nutrition and Health, Faculty of Agricultural Science, University of British Columbia, Vancouver, Canada, Department of Food Science and Nutrition, School of Agricultural Engineering and Food Science, Zhejiang University, Hangzhou, China
Solvent-extracted bamboo leaf extract (BLE) containing chlorogenic acid, caffeic acid, and luteolin 7-glucoside was evaluated in vitro for free radical scavenging and antioxidant activities using a battery of test methods. BLE exhibited a concentration-dependent scavenging activity of DPPH radical. BLE prolonged the lag phase and suppressed the rate of propagation of liposome peroxidation initiated by peroxyl radical induced by 2,2‘-azobis(2-amidinopropane dihydrochloride (AAPH) at 37 °C. BLE also prevented human low-density lipoprotein oxidation, mediated by Cu2+, which was monitored by the lower formation of conjugated diene and fluorescence and a reduced negative charge of apo-B protein. Finally, BLE protected supercoiled DNA strand against scission induced by AAPH-mediated peroxyl radical. Prooxidant activity of BLE was seen in a Cu2+-induced peroxidation of structured phosphatidylcholine liposome, indicating catalytic peroxidation due to a relatively high reducing power of BLE. It was concluded that the BLE has both antioxidant activity and prooxidant activity; the antioxidant activity was attributed to free radical scavenging activity, and the prooxidant activity, albeit minor, resulted from the reducing power of plant phenolics in the presence of transitional metal ions.
Antioxidant, bamboo leaf extract, free radical scavenging, peroxyl radical, prooxidant, reducing power, cupric ion
Structure type: monomer
Location inside paper: abstract, p. 3172, Table 1
Trivial name: glucoluteolin, luteolin 7-glucoside
Compound class: saponin glycoside, glycoside, flavonoid glycoside, flavonol glycoside, flavone glycoside, flavone glucoside
Contained glycoepitopes: IEDB_142488,IEDB_146664,IEDB_613439,IEDB_983931,SB_192
Methods: biological assays, HPLC, extraction, evaporation, antioxidant activity test
NCBI Taxonomy refs (TaxIDs): 886359Reference(s) to other database(s): CCSD:
50066, CBank-STR:939
Show glycosyltransferases
There is only one chemically distinct structure:
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