Abstract
This study falls within the search for alternative solutions to problems related to diseases associated with oxidative stress. It involved the evaluation of antioxidant activities extracts from thirteen antibacterial Cameroonian food plants, namely, P. nigrum, A. cruentus, L. sativa, S. edule, S. nigrum, V. amygdalina, A. hybridus, V. hymenolepis, L. capensis, M. esculenta, C. melo, T. occidentalis, and T. triangulare. The thirteen plant extracts with a broad spectrum of antibacterial activity all showed total reducing powers ranging between 2.41 and 27.81 AAE (mg ascorbic acid equivalents per gram of dried extract) and total phenol contents between 2.65 and 35.03 GAE (mg of gallic acid equivalents per gram of dried extract) of dry extract. Except for extracts of L. capensis, the other 12 extracts showed flavonoid contents ranging between 0.29 and 5.99 RE (rutin equivalents per gram of dried extract). All 13 plant extracts also showed free radical scavenging activity against DPPH· with IC50 ranging between 1.65 and 310.52 μg/ml, while 12 of these extracts exhibited inhibitory activity against NO· radical (IC50 ranging from 19.77 to 157.72 μg/ml). Statistically insignificant positive correlations (p>0.5) were found between antibacterial activities of these plants and their antioxidant activities. The different results of this study provide scientific evidence for the use of these antibacterial food plants in the control of different conditions associated with oxidative stress.
Highlights
Oxidative stress is a condition which arises when reactive oxygen species (ROS) production becomes higher than antioxidant defense of the organism
ROS production sometimes exceeds internal antioxidant capacity leading to oxidative stress. erefore, external antioxidants have an important function in human health. ese Journal of Chemistry bioactive compounds act preventively and neutralize the formation of new reactive species and free radicals. e exogenous antioxidants are mainly derived from food and medicinal plants including fruits, vegetables, and spices which in recent years gained great interest in their antioxidant activity. ese plants contain natural antioxidants mainly made of phenolic compounds
In June 2010, thirteen edible Cameroonian edible plants were harvested in Cameroon, West Region, City of Dschang. e collected plant materials were the fruits of P. nigrum, A. cruentus, L. sativa, S. edule, S. nigrum, V. amygdalina, A. hybridus, V. hymenolepis, L. capensis, M. esculenta, C. melo, T. occidentalis, and the fruits of P. nigrum. e plants were further identified and authenticated at the National Herbarium of Cameroon under voucher specimen numbers
Summary
Antioxidant Activities of Methanol Extracts of Thirteen Cameroonian Antibacterial Dietary Plants. Is study falls within the search for alternative solutions to problems related to diseases associated with oxidative stress. It involved the evaluation of antioxidant activities extracts from thirteen antibacterial Cameroonian food plants, namely, P. nigrum, A. cruentus, L. sativa, S. edule, S. nigrum, V. amygdalina, A. hybridus, V. hymenolepis, L. capensis, M. esculenta, C. melo, T. occidentalis, and T. triangulare. E thirteen plant extracts with a broad spectrum of antibacterial activity all showed total reducing powers ranging between 2.41 and 27.81 AAE (mg ascorbic acid equivalents per gram of dried extract) and total phenol contents between 2.65 and 35.03 GAE (mg of gallic acid equivalents per gram of dried extract) of dry extract. Insignificant positive correlations (p > 0.5) were found between antibacterial activities of these plants and their antioxidant activities. e different results of this study provide scientific evidence for the use of these antibacterial food plants in the control of different conditions associated with oxidative stress
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