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Appl. Sci. 2018, 8(12), 2516; https://doi.org/10.3390/app8122516

Effects of Sterilization on Bioactives of Jatropha dioica and Opuntia oligacantha Extracts, and on Antimicrobial Capacity against Streptococcus mutans

1
Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Circuito Ex Hacienda la Concepción s/n Carretera Pachuca-Actopan San Agustín Tlaxiaca, Hidalgo C.P. 42160, Mexico
2
Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo km 4.5., Hidalgo C.P. 42084, Mexico
3
Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km. 1, Rancho Universitario, Tulancingo, Hidalgo C.P. 43600, Mexico
4
Tecnológico Nacional de México/I. T. Roque, km. 8 Carretera Celaya-Juventino Rosas, Celaya, Guanajuato C.P. 38110, Mexico
*
Author to whom correspondence should be addressed.
Received: 15 November 2018 / Revised: 2 December 2018 / Accepted: 4 December 2018 / Published: 6 December 2018
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Abstract

Natural extracts have been used as antimicrobial agents, and extracts of the rhizomes of the dragon’s blood plant (Jatropha dioica) and of the fruit of xoconostle ‘Ulapa’ (Opuntia oligacantha) are among these agents. To be able to use the extracts, it is necessary to eliminate their natural microbiota by the means of sterilization methods; however, the effects of thermal sterilization on their properties have not been evaluated. The objective of the study was to evaluate the physico-chemical, antioxidant, and antimicrobial properties of extracts of the rhizomes of dragon’s blood and the fruit of xoconostle, when not sterilized, and when sterilized by autoclaving. The contents of phenolic compounds, flavonoids, antioxidant, and antimicrobial activity against Streptococcus mutans were not affected in autoclave-sterilized extracts of dragon’s blood rhizomes, and naringenin, apigenin, galagina, vanillic, and caffeic acid were detected, while in autoclave-sterilized extracts of xoconostle fruits, the betalain content decreased, with galagin, gallic, vanillic, and p-coumaric acid being identified. The minimum inhibitory concentration for the extract sterilized by autoclaving dragon’s blood was 2 mg/mL, and for the extract sterilized by autoclaving xoconostle, it was 28 mg/mL. Both represent natural alternatives as antimicrobial agents against S. mutans. View Full-Text
Keywords: dragon’s blood; Streptococcus mutans; xoconostle; phenolic compounds; antioxidant activity dragon’s blood; Streptococcus mutans; xoconostle; phenolic compounds; antioxidant activity
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Terrazas-Hernández, J.; Santos-López, E.M.; Cariño-Cortés, R.; Jiménez-Alvarado, R.; López-Palestina, C.U.; Hernández-Fuentes, A.D. Effects of Sterilization on Bioactives of Jatropha dioica and Opuntia oligacantha Extracts, and on Antimicrobial Capacity against Streptococcus mutans. Appl. Sci. 2018, 8, 2516.

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