Antioxidant and Antiproliferative Activities of Methanolic Extract from a Neglected Agricultural Product: Corn Cobs

Autor: Raniere Fagundes Melo-Silveira, Gabriel Pereira Fidelis, Rony Lucas Silva Viana, Vinícius Campelo Soeiro, Rodrigo Augusto da Silva, Daisy Machado, Leandro Silva Costa, Carmen Veríssima Ferreira, Hugo Alexandre Oliveira Rocha
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: Molecules, Vol 19, Iss 4, Pp 5360-5378 (2014)
Druh dokumentu: article
ISSN: 1420-3049
19045360
DOI: 10.3390/molecules19045360
Popis: Neglected agricultural products (NAPs) are defined as discarded material in agricultural production. Corn cobs are a major waste of agriculture maize. Here, a methanolic extract from corn cobs (MEC) was obtained. MEC contains phenolic compounds, protein, carbohydrates (1.4:0.001:0.001). We evaluated the in vitro and in vivo antioxidant potential of MEC. Furthermore, its antiproliferative property against tumor cells was assessed through MTT assays and proteins related to apoptosis in tumor cells were examined by western blot. MEC showed no hydroxyl radical scavenger capacity, but it showed antioxidant activity in Total Antioxidant Capacity and DPPH scavenger ability assays. MEC showed higher Reducing Power than ascorbic acid and exhibited high Superoxide Scavenging activity. In tumor cell culture, MEC increased catalase, metallothionein and superoxide dismutase expression in accordance with the antioxidant tests. In vivo antioxidant test, MEC restored SOD and CAT, decreased malondialdehyde activities and showed high Trolox Equivalent Antioxidant Capacity in animals treated with CCl4. Furthermore, MEC decreased HeLa cells viability by apoptosis due an increase of Bax/Bcl-2 ratio, caspase 3 active. Protein kinase C expression increased was also detected in treated tumor cells. Thus, our findings pointed out the biotechnological potential of corn cobs as a source of molecules with pharmacological activity.
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