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Sarkar L, Oko L, Gupta S, Bubak AN, Das B, Gupta P, Safiriyu AA, Singhal C, Neogi U, Bloom D, Banerjee A, Mahalingam R, Cohrs RJ, Koval M, Shindler KS, Pal D, Nagel M, Sarma JD. Azadirachta indica A. Juss bark extract and its Nimbin isomers restrict β-coronaviral infection and replication. Virology 2022; 569:13-28. [PMID: 35219218 PMCID: PMC8844965 DOI: 10.1016/j.virol.2022.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/10/2022] [Accepted: 01/12/2022] [Indexed: 01/08/2023]
Abstract
Emerging mutations in the SARS-CoV-2 genome pose a challenge for vaccine development and antiviral therapy. The antiviral efficacy of Azadirachta indica bark extract (NBE) was assessed against SARS-CoV-2 and m-CoV-RSA59 infection. Effects of in vivo intranasal or oral NBE administration on viral load, inflammatory response, and histopathological changes were assessed in m-CoV-RSA59-infection. NBE administered inhibits SARS-CoV-2 and m-CoV-RSA59 infection and replication in vitro, reducing Envelope and Nucleocapsid gene expression. NBE ameliorates neuroinflammation and hepatitis in vivo by restricting viral replication and spread. Isolated fractions of NBE enriched in Nimbin isomers shows potent inhibition of m-CoV-RSA59 infection in vitro. In silico studies revealed that NBE could target Spike and RdRp of m-CoV and SARS-CoV-2 with high affinity. NBE has a triterpenoids origin that may allow them to competitively target panoply of viral proteins to inhibit mouse and different strains of human coronavirus infections, suggesting its potential as an antiviral against pan-β-Coronaviruses.
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Affiliation(s)
- Lucky Sarkar
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, India
| | - Lauren Oko
- Department of Neurology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Soham Gupta
- The Systems Virology Lab, Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, Stockholm, Sweden
| | - Andrew N Bubak
- Department of Neurology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Bishnu Das
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, India
| | - Parna Gupta
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, India
| | - Abass Alao Safiriyu
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, India
| | - Chirag Singhal
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, India
| | - Ujjwal Neogi
- The Systems Virology Lab, Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, Stockholm, Sweden
| | - David Bloom
- Department of Molecular Genetics and Microbiology, University of Florida College of Medicine, Gainesville, FL, USA
| | - Arup Banerjee
- Laboratory of Virology, Regional Centre for Biotechnology, and Translational Health Science & Technology Institute Faridabad, Haryana, India
| | - Ravi Mahalingam
- Department of Neurology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Randall J Cohrs
- Department of Neurology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Michael Koval
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Kenneth S Shindler
- Departments of Ophthalmology and Neurology, University of Pennsylvania, Scheie Eye Institute, Philadelphia, PA, USA
| | - Debnath Pal
- Department of Computational and Data Sciences, Indian Institute of Science, Bangalore Karnataka, 560012, India
| | - Maria Nagel
- Department of Neurology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Jayasri Das Sarma
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, India; Department of Ophthalmology, University of Pennsylvania, Philadelphia, PA, USA.
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