Browsing by Author "Nyarko, Ruby A."

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    Acalyphawilkesiana ‘inferno’hydroethanolicleafextracthas protectiveeffectoncarbontetrachloride-inducedsubacute toxicityinanimals
    (Biomedical Research and Therapy, 2020-05) Larbie, Christopher; Emikpe, Benjamin O.; Oyagbemi, Ademola A.; Nyarko, Ruby A.; Jarikre, Theophilus A.; Adjei, Clement O.; Aseidu, Emmanue lB.
    Introduction: Liverfibrosisisoneofthemostcommonclinicalmanifestationsofhepaticdiseases. However, though many synthetic drugs exist for the treatment and prevention of liver diseases, liver injuries still persist. The present study, therefore, sought to investigate the subacute protective effects of Acalphyawilkesiana against carbon tetrachloride (CCl4)-induced toxicity in animals. Methodology: Liver injury was induced in experimental animals by administering CCl4 (1:1 v/v in olive oil, intraperitoneally (i.p.), twice weekly for 8 weeks) after pre-treatment with extract of A. wilkesiana(AWE).AWE(250mg/kg)andSilymarin(120mg/kg)wereadministeredorally(dailyfor8 weeks). Thehepatoprotectiveeffectwasstudiedbyassayingtheactivityofliverenzymes,suchas alanineaminotransferase(ALT),aspartateaminotransferase(AST),alkalinephosphatase(ALP),and alpha-fetoprotein. Theeffectofthetreatmentsonliverprooxidants(e.g. malondialdehyde[MDA]) andantioxidants(e.g. superoxidedismutase[SOD],reducedglutathione[GSH],glutathioneperoxidase [GPx], and glutathione transferase [GST]), as well as inflammatory cytokines (e.g. interleukin [IL]-17, IL-23, nuclear factor kappa beta [NF-kB], and cycloxygenase-1 [COX-1]) and the histology of the liver were also examined. Results: The activity of liver function biomarkers changed significantly upon CCl4 administration; increases in ALT, total and direct bilirubin, and some fibrosis indices (e.g. alpha-fetoprotein and APRI [p<0.05-0.001, compared with normal]) were observed. Co-administration of AWE with CCl4 restored these to normal levels. The intensity of structural alterations revealed that the AWE treatment has protective potential against subacute liver injury. AWEtreatmentalsoreducedtheexpressionofIL-17,1L-23,NF-kBandCOX-1,underscoringitsantiinflammatory properties. Conclusion: The results of the current study generally suggest that hydroethanolicleafextractsofA.wilkesianainfernopossesssomesubacuteprotectiveactivitybyimproving liver function and inhibition of inflammation, and could be developed as a potent antifibroticagent.
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    Griffonia simplicifolia (DC.) Baill. attenuates gentamicin and cisplatin-induced nephrotoxicty in rats
    (Comparative Clinical Pathology, 2019-03) Nyarko, Ruby A.; Larbie, Christopher; Anning, Alexander K.; Baidoo, Philip K; Emikpe, Benjamin O.; Oyagbemi, Ademola A.; Jarikre, Theophilus A.
    Nephrotoxicity is one of the most common kidney conditions. However, most conventional drugs are not adequate for treatment. This study was designed to evaluate the nephroprotective activity of 50% hydroethanolic leaf extract of Griffonia simplicifolia (DC.) Benth in drug-induced nephrotoxicity in Sprague–Dawley rats. Nephrotoxicity was induced in experimental animals by administering gentamicin and cisplatin after pretreatment with hydroethanolic extract of G. simplicifolia (GSE). GSE at 100 and 250 mg/kg were administered for 7 and 10 days by oral gavage in the gentamicin and cisplatin models, respectively. Silymarin (120 mg/kg) was given as the standard nephroprotective drug. Nephroprotective effect was studied by assaying the activity of kidney function biomarkers such as creatinine, urea, sodium, chloride, and potassium concentrations. The effect of the treatments on kidney antioxidant enzymes (SOD, MDA, GSH, GPx, GST and NO), inflammatory cytokines (IL 17, IL 23 and COX-2) and the histology of the kidney were also examined. The activity of all the kidney function biomarkers changed significantly in gentamicin and cisplatin-treated rats; increased in urea and creatinine concentration and decreased in Na, K and Cl concentrations. Co-administration of GSE with the nephrotoxins restored these to normal levels. It also reduced NO concentration in both the gentamicin and cisplatin model and increased GPx concentration in the gentamicin model. GSE showed a higher percentage protection than silymarin, a standard nephroprotective drug, in both the gentamicin and cisplatin models. Intensity of structural alterations revealed that the GSE treatments have a protective potential against nephrotoxicity. GSE treatments improved expressions of IL17 and IL23, thus underscoring the proinflammatory and healing properties of GSE, respectively. The results generally indicate that leaves of G. simplicifolia possess nephroprotective activity.