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Phytochemical Investigation, Antioxidant and Antimycobacterial Activities of Schkuhria pinnata (Lam) Thell Extracts Against Mycobacterium smegmatis.
J Evid Based Integr Med. 2019 Jan-Dec; 24:2515690X19866104.JE

Abstract

The focus of this study was to evaluate the antioxidants and antimycobacterial activities of extracts of Schkuhria pinnata. Serial exhaustive extraction procedure was employed using solvents of varying polarity to obtain the desired extracts. Thin layer chromatography and standard chemical tests were used to analyze phytochemicals constituents. Free radical scavenging 2,2-diphenyl-1-picrylhydrazyl (DPPH) methods were used to detect the presence of antioxidant compounds. Antimycobacterial activity was evaluated using microdilution and bioautography assays. A variety of secondary metabolites such as flavonoids, tannins, and alkaloids were detected in the extract. Ethyl acetate and acetone extracts had high antioxidant activity on chromatograms eluted in ethyl acetate/methanol/water while methanol extract at various concentrations had the best scavenging activity. The minimum inhibitory concentration (MIC) values ranged from 0.02 to 2.50 mg/mL. Total phenol content was 55.33 ± 3.51 mg of gallic acid equivalent (GAE)/g and higher when compared with flavonoids (4.00 ± 0.35 mg of quercetin equivalent [QE]/mg) and tannin content (28.00 ± 1.73 mg of GAE/g). The most effective antimycobacterial activity against Mycobacterium smegmatis was observed with the lowest inhibitory concentrations of acetone (0.27 mg/mL), dichloromethane (0.32 mg/mL), and ethyl acetate (0.32 mg/mL) in that order. In massive extraction, hexane and dichloromethane had the greatest inhibitory bands on benzene/ethanol/ammonium hydroxide bioautograms. Antimmycobacterial activity gives promising potential leads of S pinnata extracts to be used in the development of antimycobacterial drugs. The presence of antioxidant and antimycobacterial compounds requires further isolation and purification.

Authors+Show Affiliations

1 University of Limpopo, Sovenga, South Africa.1 University of Limpopo, Sovenga, South Africa.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

31392895

Citation

Masoko, Peter, and Maano V. Masiphephethu. "Phytochemical Investigation, Antioxidant and Antimycobacterial Activities of Schkuhria Pinnata (Lam) Thell Extracts Against Mycobacterium Smegmatis." Journal of Evidence-based Integrative Medicine, vol. 24, 2019, p. 2515690X19866104.
Masoko P, Masiphephethu MV. Phytochemical Investigation, Antioxidant and Antimycobacterial Activities of Schkuhria pinnata (Lam) Thell Extracts Against Mycobacterium smegmatis. J Evid Based Integr Med. 2019;24:2515690X19866104.
Masoko, P., & Masiphephethu, M. V. (2019). Phytochemical Investigation, Antioxidant and Antimycobacterial Activities of Schkuhria pinnata (Lam) Thell Extracts Against Mycobacterium smegmatis. Journal of Evidence-based Integrative Medicine, 24, 2515690X19866104. https://doi.org/10.1177/2515690X19866104
Masoko P, Masiphephethu MV. Phytochemical Investigation, Antioxidant and Antimycobacterial Activities of Schkuhria Pinnata (Lam) Thell Extracts Against Mycobacterium Smegmatis. J Evid Based Integr Med. 2019 Jan-Dec;24:2515690X19866104. PubMed PMID: 31392895.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Phytochemical Investigation, Antioxidant and Antimycobacterial Activities of Schkuhria pinnata (Lam) Thell Extracts Against Mycobacterium smegmatis. AU - Masoko,Peter, AU - Masiphephethu,Maano V, PY - 2019/8/9/entrez PY - 2019/8/9/pubmed PY - 2020/3/24/medline KW - antimycobacterial activity KW - antioxidants KW - medicinal plants KW - phytochemicals SP - 2515690X19866104 EP - 2515690X19866104 JF - Journal of evidence-based integrative medicine JO - J Evid Based Integr Med VL - 24 N2 - The focus of this study was to evaluate the antioxidants and antimycobacterial activities of extracts of Schkuhria pinnata. Serial exhaustive extraction procedure was employed using solvents of varying polarity to obtain the desired extracts. Thin layer chromatography and standard chemical tests were used to analyze phytochemicals constituents. Free radical scavenging 2,2-diphenyl-1-picrylhydrazyl (DPPH) methods were used to detect the presence of antioxidant compounds. Antimycobacterial activity was evaluated using microdilution and bioautography assays. A variety of secondary metabolites such as flavonoids, tannins, and alkaloids were detected in the extract. Ethyl acetate and acetone extracts had high antioxidant activity on chromatograms eluted in ethyl acetate/methanol/water while methanol extract at various concentrations had the best scavenging activity. The minimum inhibitory concentration (MIC) values ranged from 0.02 to 2.50 mg/mL. Total phenol content was 55.33 ± 3.51 mg of gallic acid equivalent (GAE)/g and higher when compared with flavonoids (4.00 ± 0.35 mg of quercetin equivalent [QE]/mg) and tannin content (28.00 ± 1.73 mg of GAE/g). The most effective antimycobacterial activity against Mycobacterium smegmatis was observed with the lowest inhibitory concentrations of acetone (0.27 mg/mL), dichloromethane (0.32 mg/mL), and ethyl acetate (0.32 mg/mL) in that order. In massive extraction, hexane and dichloromethane had the greatest inhibitory bands on benzene/ethanol/ammonium hydroxide bioautograms. Antimmycobacterial activity gives promising potential leads of S pinnata extracts to be used in the development of antimycobacterial drugs. The presence of antioxidant and antimycobacterial compounds requires further isolation and purification. SN - 2515-690X UR - https://www.unboundmedicine.com/medline/citation/31392895/Phytochemical_Investigation_Antioxidant_and_Antimycobacterial_Activities_of_Schkuhria_pinnata__Lam__Thell_Extracts_Against_Mycobacterium_smegmatis_ L2 - http://journals.sagepub.com/doi/full/10.1177/2515690X19866104?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -