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- 검색키워드
- 저자 : O.G. Ademowo (검색결과 2 건)
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O.A. Adaramoye,E.O. Farombi,M. Nssien,S.O. Idowu,O.G. Ademowo,E.O. Adeyemi 한국식품영양과학회 2008 Journal of medicinal food Vol.11 No.3
The hepatoprotective activity of kolaviron (KV), a biflavonoid complex from Garcinia kola seeds, and its purified fractions was investigated in mice intoxicated with carbon tetrachloride (CCl4). The ability of vitamin E to attenuate the toxicity was also examined. KV was extracted from powdered seeds of G. kola and then separated by thin-layer chromatography into three fractions—Fraction I (FI), Fraction II (FII), and Fraction III (FIII), with ratio of fronts values of 0.48, 0.71, and 0.76, respectively. Pretreatment with KV, FI, and FII at a dose of 100 mg/kg of body weight for 2 weeks and then challenge with CCl4 at a dose of 1.2 g/kg of body weight, three times a week for 2 consecutive weeks, decreased the CCl4-induced increase in activities of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) by 31%, 30%, and 31% and 41%, 55%, and 42%, respectively. CCl4 intoxication also caused a significant (P < .05) accumulation of lipid peroxidation (LPO) products as revealed by the formation of the thiobarbituric acid-reactive substances: CCl4 induced LPO levels in serum and microsomes by 112% and 89%, respectively. However, pretreatment with KV, FI, and FII decreased LPO levels in serum by 31%, 41%, and 40% and in microsomes by 48%, 39%, and 35%, respectively. Vitamin E was protective in reducing the CCl4-induced increase in levels of AST, ALT, and γ-glutamyl transferase as well as LPO. Furthermore, CCl4 intoxication significantly (P < .05) decreased the activities of microsomal glucose-6-phosphatase, aniline hydroxylase, and cytosolic glutathione-S-transferase (GST). While pretreatments with KV, FI, and FII were able to ameliorate the levels of glucose-6-phosphatase and GST, there were no significant (P > .05) effects on the levels of aniline hydroxylase and DT-diaphorase. This study confirms that FI and FII from KV enhanced recovery from CCl4-induced hepatotoxicity by decreasing the extent of LPO and also inducing the levels of phase II enzyme (GST). These fractions are responsible for the observed antihepatotoxic effect of KV.
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Ajayi Abayomi Mayowa,Ben-Azu Benneth,Sikiru O. Balogun,Ruberlei Godinho de Oliveira,Umukoro Solomon,Domingos Tabajara de Oliveira,Olusegun G. Ademowo 경희대학교 융합한의과학연구소 2022 Oriental Pharmacy and Experimental Medicine Vol.22 No.3
Ocimum gratissimum L. has attracted substantial consideration from researchers because of its anti-inflammatory uses in ethnomedicine in Sub-Saharan Africa and Asia. This study investigated the effect of flavonoid-rich ethylacetate fraction of O. gratissimum (EAFOg) in apoptosis induction of activated macrophages and inflammatory response in LPS-induced air pouch in rats. Apoptotic effect of EAFOg in LPS-stimulated RAW 264.7 cells was evaluated using flow cytometry after staining with annexin-V and 7-aminoactinomycin D. Its effects on inflammatory cells and mediators were investigated utilizing 6 day old subcutaneous air pouch-rats. Sterile saline (0.9%) or LPS (100 ng/mL) was injected into the air pouch on 6th day after EAFOg (25, 50 and 100 mg/kg) pretreatment. Rectal body temperature was recorded hourly for 5 h after LPS injection. Thereafter, the neutrophil count, nitrite, TNF-α, PGE2, nitrite, malondialdehyde and reduced glutathione (GSH) levels were determined in the pouch lavage. The activities of myeloperoxidase and superoxide dismutase (SOD) as well as immunohistochemical staining for cyclooxygenase-2 were also performed. EAFOg (10, 30 and 100 μg/mL) induced apoptosis in LPS-stimulated RAW 264.7 macrophages. The EAFOg reduced hyperthermia and decreased neutrophil counts, TNF-α, PGE2, nitrite, myeloperoxidase as well as cyclooxygenase-2 expression evoked by LPS in rats. It also reduced malondialdehyde, and increased GSH and SOD levels in LPS-induced air pouch in vivo. The results of this study suggest that the EAFOg
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