title: Spectral characterisation, antiviral activities, in silico ADMET and molecular docking of the compounds isolated from Tectona grandis to chikungunya virus.
abstract: Chikungunya infection is treated symptomatically with antipyretics and anti-inflammatory drugs without any specific antiviral drug till date. The lack of an approved antiviral drug and the emergence of virulent strains after 2006 epidemics emphasize the need for the development of potential antiviral drugs to Chikungunya virus. Hence, we studied the antiviral activity of the extracts and compounds isolated from Tectona grandis leaves to both the Asian and East central South African strains of Chikungunya virus. Five compounds were isolated from the ethanolic extract of Tectona grandis by bioactivity guided fractionation followed by Spectral Characterisation through GC-MS and NMR spectroscopy and investigated for the antiviral activity. Also in silico ADMET and Molecular Docking of the characterised compounds against the structural and non structural proteins of Chikungunya virus were performed. The characterised compound Benzene-1-carboxylic acid hexadeconate was effective at IC 50 3.036μg/ml (7.5μM) and 76.46μg/ml (189.02μM) to Asian and ECSA strain of CHIKV respectively. The compound showed desirable pharmacokinetic properties and significant molecular interactions with the E1 protein of Chikungunya virus by in silico analysis. Thus Benzene-1-carboxylic acid-2-hexadeconate isolated from Tectona grandis was found to be a promising drug candidate to both the Asian and ECSA strains of Chikungunya virus with high selectivity indices in comparison to the reference RNA antiviral drug Ribavirin.
authors.affiliation: PG & Research Dept of Microbiology & Biotechnology, Presidency College(Aut), Chepauk, Chennai, India. Electronic address: sangee.star@gmail.com.
authors.forename: Sangeetha
authors.initials: S
authors.lastname: K
authors.affiliation: PG & Research Dept of Microbiology & Biotechnology, Presidency College(Aut), Chepauk, Chennai, India. Electronic address: indu.purushothman5@gmail.com.
authors.forename: Indu
authors.initials: I
authors.lastname: Purushothaman
authors.affiliation: Centre for Drug Design, Discovery and Development, SRM University, Delhi-NCR, Sonepat, India. Electronic address: drsrajarajan@gmail.com.
authors.forename: Rajarajan
authors.initials: R
authors.lastname: S
mesh_terms: D000818:Animals; D000998:Antiviral Agents / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology*; D002646:Chikungunya virus / Q000187:drug effects* / Q000378:metabolism; D002522:Chlorocebus aethiops; D003198:Computer Simulation; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006801:Humans; D019686:Lamiaceae; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D062105:Molecular Docking Simulation / Q000379:methods*; D010936:Plant Extracts / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology*; D014709:Vero Cells
chemical_list: D000998:Antiviral Agents; D010936:Plant Extracts
keywords: Antiviral activity; Chikungunya virus; Tectona grandis