Isolation, Characterization, Antimicrobial and Theoretical Investigation of Some Bioactive Compounds Obtained from the Bulbs of Calotropisprocera

Muluh Emmanuel  Khan; Chijioke Ezekiel Elum; Augustina Onyebuchi Ijeomah; hilip John Ameji; Izuagbe Gilbert Osigbemhe; Emmanuel Etim (PhD); John Veshima Anyam; Alexander Abel; CyprianTernenge Agber

doi:10.46481/jnsps.2023.1576

Authors

M. E. Khan
Department of Chemistry, Federal University Lokoja, Kogi State, Nigeria
C. E. Elum
Department of Chemistry, Federal University of Agriculture Makurdi, Benue State, Nigeria
A. O. Ijeomah
Department of Chemistry, Federal University of Agriculture Makurdi, Benue State, Nigeria
P. J. Ameji
Department of Chemistry, Federal University Lokoja, Kogi State, Nigeria
I. G. Osigbemhe
Department of Industrial Chemistry, Federal University Lokoja, Kogi State, Nigeria
E. E. Etim
[email protected]

Department of Chemical Sciences, Federal University Wukari, Taraba State, Nigeria
J. V. Anyam
Department of Chemistry, Federal University of Agriculture Makurdi, Benue State, Nigeria
A. Abel
Department of chemistry, College of Education Hong, Adamawa State, Nigeria
C. T. Agber
Department of Chemistry, Benue State University, Makurdi, Benue State, Nigeria

Keywords:

Phytochemical Screening, Anti-microbial screening, Calotropis procera, Pharmacokinetics

Abstract

This study characterizes the bioactive molecules from the bulb of Calotropisprocera and investigates the antimicrobial activities of the crude extracts. Theoretical studies on the two isolated compounds in the crude extract were also accomplished.The bulbs were air dried, pulverized, and subjected to extraction procedures by maceration using 500 mL each of normal-hexane, ethyl acetate and methanol. The crude extracts were further tested onmicroorganisms and phytochemical screening using standard procedures. In addition, the bioactive compounds in the extract were screened against DNA gyrase of two Gram negative bacterial species; Escherichia coli and Salmonella typhiusing Molecular Docking simulation techniques and further subjected to ADMET profiling,using the Swiss ADME online server. The Crude ethyl acetate extract has the highest effective activity against Escherichia coli (MIC 2.5mg / mL and MBC/MFC 5mg / mL), Staphylococcus aureus (MIC 2.5mg/mL), Candida albicans, Salmonella typhiand Candida stellafoidea (MIC 5mg/mL). beta-Amyrin acetate and Taraxasterol are the two phytochemicals in the purified white crystalline fractions and were found to fasten to the active sites of DNA gyrase of the Gram negative bacterial species via hydrophobic and hydrogen bond interactions, with binding activity value of -9.6 kcal/mol and -9.5 kcal/mol, respectively. Also, ADMET investigations of the compounds revealed their sound oral bioavailability and excellent pharmacokinetic and toxicity profiles. The findings of this study could provide a platform for discovering safe and potent antibiotics against pathogenic microbes ravaging our society.

Dimensions

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