title: Growth Period Effects on the Protective Properties of Aloe vera Against t-BHP-Induced Oxidative Stress in Chang Cells.
abstract: Aloe vera has been used in traditional medicine for the therapy of a variety of disorders, such as wounds and burns. However, few studies have examined the antioxidant capacities of A. vera plants during different growth periods. In order to investigate the effects of growth on antioxidant activity, A. vera was prepared from 2-, 4-, 6-, 8-, and 12-month-old aloe. The extracts from 6-month-old A. vera showed the highest contents of flavonoids (9.750 mg catechin equivalent/g extract) and polyphenols (23.375 mg gallic acid equivalent/g extract) and the highest ferric reducing antioxidant power (0.047 mM ferrous sulfate equivalent/mg extract). The extract from 6-month-old A. vera exhibited the highest free radical scavenging potential, and the lowest IC50 values were found for 2,2-diphenyl-1-picrylhydrazyl (0.26 mg/ml) and alkyl radicals (0.50 mg/ml). In addition, the extract from 6-month-old A. vera showed the greatest effects on cell viability in normal liver cells. Based on these findings, the extract from 6-month-old A. vera was examined further in order to determine its protective potential against tert-butyl hydroperoxide (t-BHP)-induced oxidative stress. The extract from 6-monthold A. vera at a concentration of 0.25 mg/ml showed the highest protective activity against t-BHP-induced reactive oxygen species production. These findings suggested that harvesting regimens were critical in the regulation of effects of the bioactive potential of A. vera on antioxidant activity.
authors.affiliation: Department of Biotechnology, Konkuk University, Chungju 380-701, Republic of Korea.
authors.forename: Jin-Woo
authors.initials: JW
authors.lastname: Hwang
authors.affiliation: Division of Food and Bio Science, Konkuk University, Chungju 380-701, Republic of Korea.|Nokyong Research Center, Konkuk University, Chungju 380-701, Republic of Korea.
authors.forename: Eun-Kyung
authors.initials: EK
authors.lastname: Kim
authors.affiliation: Department of Biotechnology, Konkuk University, Chungju 380-701, Republic of Korea.
authors.forename: Yon-Suk
authors.initials: YS
authors.lastname: Kim
authors.affiliation: Department of Biotechnology, Konkuk University, Chungju 380-701, Republic of Korea.
authors.forename: Jae Woong
authors.initials: JW
authors.lastname: Lee
authors.affiliation: Central Research Institute, Naturetech, Jincheon 365-850, Republic of Korea.
authors.forename: Jeong-Jun
authors.initials: JJ
authors.lastname: Lee
authors.affiliation: Central Research Institute, Naturetech, Jincheon 365-850, Republic of Korea.
authors.forename: Han-Jong
authors.initials: HJ
authors.lastname: Pyo
authors.affiliation: Division of Food and Bio Science, Konkuk University, Chungju 380-701, Republic of Korea.|Nokyong Research Center, Konkuk University, Chungju 380-701, Republic of Korea.
authors.forename: Sang-Ho
authors.initials: SH
authors.lastname: Moon
authors.affiliation: Division of Food and Bio Science, Konkuk University, Chungju 380-701, Republic of Korea.|Nokyong Research Center, Konkuk University, Chungju 380-701, Republic of Korea.
authors.forename: Byong-Tae
authors.initials: BT
authors.lastname: Jeon
authors.affiliation: Department of Biotechnology, Konkuk University, Chungju 380-701, Republic of Korea.|Nokyong Research Center, Konkuk University, Chungju 380-701, Republic of Korea.
authors.forename: Pyo-Jam
authors.initials: PJ
authors.lastname: Park
mesh_terms: D000504:Aloe / Q000737:chemistry*; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D005419:Flavonoids / Q000032:analysis; D016166:Free Radical Scavengers / Q000302:isolation & purification / Q000494:pharmacology*; D005609:Free Radicals / Q000032:analysis; D022781:Hepatocytes / Q000187:drug effects* / Q000502:physiology; D006801:Humans; D018384:Oxidative Stress / Q000187:drug effects*; D010545:Peroxides / Q000633:toxicity*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D059808:Polyphenols / Q000032:analysis
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D016166:Free Radical Scavengers; D005609:Free Radicals; D010545:Peroxides; D010936:Plant Extracts; D059808:Polyphenols; C000602361:tert-butyl peroxide
keywords: Aloe vera; antioxidant activity; growth period