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Synthetic and natural antioxidants attenuate cisplatin-induced vomiting

Alam, Javaid, Subhan, Fazal, Ullah, Ihsan, Shahid, Muhammad, Ali, Gowhar and Sewell, Robert David Edmund 2017. Synthetic and natural antioxidants attenuate cisplatin-induced vomiting. BMC Pharmacology and Toxicology 18 (4) 10.1186/s40360-016-0110-9

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Background: Synthetic and natural antioxidants including Bacopa monnieri (L.) Pennell (Scrophulariaceae) which also possess anti-dopaminergic properties, have been proposed to be useful for emetogenic chemotherapy. In this study, synthetic [N-(2-mercaptopropionyl) glycine (MPG), vitamin C (Vit-C)] and natural [grape seed proanthocyanidin (GP), B. monnieri n-butanolic fraction (BM-ButFr)] antioxidants and their combinations were evaluated against cisplatin-induced emesis in pigeons during a 24 h observation period. Methods: Emesis was induced using cisplatin (7.0 mg/kg, i.v). MPG (10, 20, 30 mg/kg), Vit-C (100, 200, 300 mg/kg), GP (50, 100, 150 mg/kg) and BM-ButFr (5, 10, 20 mg/kg) and their combinations were administered i.m., 15 min before cisplatin administration. The number of vomiting bouts, retching, emetic latency and % weight loss were recorded to assess antiemetic potential. Antioxidant activity was evaluated by the DPPH free radical scavenging assay (FRSA). Results: Significant attenuation of vomiting bouts, retching, % weight loss along with an increase in latency was produced by all the antioxidants and their combinations compared to cisplatin alone and this is the first report of this activity of GP in pigeons. Low EC50 values in the FRSA for MPG (67.66 μg/mL), Vit-C (69.42 μg/mL), GP (6.498 μg/mL) and BM-ButFr (55.61 μg/mL) compared to BHT standard (98.17 μg/mL) demonstrated their radical scavenging capacity. Correlation between the antioxidant activity and antiemetic efficacy disclosed a high degree of correlation for the tested antioxidants. Conclusion: The selected synthetic and natural antioxidants and their combinations were able to attenuate cisplatin-induced vomiting, which correlated with their potent in vitro antioxidant activity.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Pharmacy
Subjects: R Medicine > RS Pharmacy and materia medica
Uncontrolled Keywords: Emesis, Antiemetic, Chemotherapy, Bacopa monnieri, Grape seed proanthocyanidin, N-(2-mercaptopropionyl) glycine, Vitamin C, Free radical scavenging assay, Correlation
Publisher: BioMed Central
ISSN: 2050-6511
Date of First Compliant Deposit: 22 February 2017
Date of Acceptance: 13 December 2016
Last Modified: 10 Jan 2018 17:09

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