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    Effect of aqueous extract and anthocyanins of calyces of Hibiscus sabdariffa (Malvaceae) in rats with adenine-induced chronic kidney disease
    (Wiley, 2017) Ali, Badreldin H.; Cahlikova, Lucie; Opletal, Lubomir; Karaca, Turan; Manoj, Priyadarsini; Ramkumar, Aishwarya; Al Suleimani, Yousuf M.
    ObjectivesThe aim of this work was to assess the possible beneficial effects of aqueous extracts of Hibiscus sabdariffa L. calyces and anthocyanins isolated therefrom in an adenine-induced chronic kidney disease (CKD) model. MethodsRats were orally given, for 28 consecutive days, either adenine alone or together with either aqueous extract of H. sabdariffa calyces (5 and 10%) or anthocyanins (50, 100 and 200 mg/kg of anthocyanin concentrate). For comparative purposes, two groups of rats were given lisinopril (10 mg/kg). Key findingsWhen either H. sabdariffa aqueous extract or the anthocyanins isolated from it was administered along with adenine, the adverse effects of adenine-induced CKD were significantly lessened, mostly in a dose-dependent manner. The positive effects were similar to those obtained by administration of lisinopril. ConclusionsThe results obtained show that both H. sabdariffa and its anthocyanins could be considered as possible promising safe dietary agents that could be used to attenuate the progression of human CKD. This could have added significance as H. sabdariffa tea is widely consumed in many parts of Africa and Asia and is thus readily available.
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    The effect of sildenafil on rats with adenine-Induced chronic kidney disease
    (Elsevier France, 2018) Ali, Badreldin H.; Al Za'abi, Mohammed; Adham, Sirin A.; Al Suleimani, Yousuf; Karaca, Turan; Manoj, Priyadarsini; Al Kalbani, Jamila; Yasin, Javid; Nemmar, Abderrahim
    The erectile dysfunction drug sildenafil has cardiopulmonary protective actions, and a nephroprotective action in cisplatin and ischemia-reperfusion- induced acute kidney injury. Here, we assessed its possible ameliorative action in a model of chronic kidney disease (CKD) using adenine feeding. Eight groups of rats were treated with saline (controls), adenine (0.25% w/w in feed daily for 5 weeks), and oral sildenafil (0.1, 0.5 or 2.5 mg/kg), either alone, or concomitantly with adenine. Urine was collected 24 h after the end of the treatments from all rats and blood pressure measured, followed by collection of blood and kidneys for the measurement of several functional, biochemical and histopathological parameters. Adenine treatment reduced body weight, creatinine renal clearance, and increased water intake and urine output, as well as the plasma concentrations of urea and creatinine, neutrophil gelatinase-associated lipocalin, and N-acetyl-beta-D-glucosaminidase activity, and albumin in urine. Adenine also increased the concentrations of the uremic toxins indoxyl sulfate, uric acid and phosphate, and a number of proteins and inflammatory cytokines, and decreased that of several anti - oxidant indices. Renal histopathological markers of damage (inflammation and fibrosis) were significantly increased by adenine. Sildenafil, given simultaneously with adenine, induced a dose - dependent improvements in most of the above parameters, suggesting its possible use as adjunct treatment for CKD in humans.
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    The effect of the dipeptidyl peptidase-4 inhibitor sitagliptin on gentamicin nephrotoxicity in mice
    (Elsevier France-Editions Scientifiques Medicales Elsevier, 2018) Al Suleimani, Yousuf M.; Abdelrahman, Aly M.; Karaca, Turan; Manoj, Priyadarsini; Ashique, Mohammed; Nemmar, Abderrahim; Ali, Badreldin H.
    This study aimed at investigating the possible ameliorative effects of sitagliptin in mice with gentamicin (GEN) nephrotoxicity. Sitagliptin was given to the animals at an oral dose of 10 mg kg(-1) per day for 10 days, and in some of these mice, GEN was injected intraperitoneally at a dose of 100 mg kg(-1) per day during the last seven days of the treatment. Nephrotoxicity was evaluated histopathologically by light microscopy and biochemically by measuring several indices in plasma, urine and renal cortex homogenates. GEN treatment induced nephrotoxicity as evidenced by significantly (P < 0.0001) increasing the plasma concentrations of urea, creatinine, circulatory cytokines, cystatin C, sclerostin, and TNF alpha. Treatment with GEN also significantly elevated urinary N-acetyl-beta-D glucosaminidase (NAG) concentration (P < 0.0001). Moreover, GEN caused significant increase in oxidative stress in the kidneys (P < 0.0001). Histopathological examination revealed massive tubular injury, necrosis, infiltration of inflammatory cells and intraluminal hyaline casts in mice treated with GEN. Sitagliptin alone did not significantly affect any of the indices measured. However, concomitant treatment with sitagliptin and GEN significantly mitigated most of the nephrotoxic actions of GEN. Pending further studies, sitagliptin may potentially be useful as a nephroprotectant agent.
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    Potassium bromate-induced kidney damage in rats and the effect of gum acacia thereon
    (E-Century Publishing Corp, 2018) Ali, Badreldin H.; Al Za'abi, Mohammed; Karaca, Turan; Al Suleimani, Yousuf; Al Balushi, Khalid A.; Manoj, Priyadarsini; Ashique, Mohammed
    Potassium bromate (KBrO3) is used in many countries in cosmetic and food industries. In this work, we investigated in male Sprague-Dawley rats, the effect of four graded oral doses of KBrO3 (5, 15, 45 and 135 mg/kg/day for 28 days) on renal function tests, inflammation, oxidative damage, and apoptosis, as well as on histopathology, using several traditional and novel renal injury biomarkers in plasma, urine and renal tissues. We also tested the possible ameliorative action of the renoprotective prebiotic agent gum acacia (GA) on the actions of KBrO3 when given concomitantly with it in the drinking water at a concentration of 15% w/v. Taken together, the results indicated that treatment with KBrO3 at the 45 and 135 mg/kg doses caused a significant dose-dependent nephrotoxicity, as evident by the measured renal structural and functional indices and biomarkers of toxicity. GA co-treatment significantly abated most of the indices and biomarkers of the renal toxicity caused by KBrO3, suggesting a beneficial effect and its possible inclusion in edible products where KBrO3 is still used.