A review: Mechanism of action of antiviral drugs

Author:

Kausar Shamaila1,Said Khan Fahad2ORCID,Ishaq Mujeeb Ur Rehman Muhammad2,Akram Muhammad2,Riaz Muhammad3ORCID,Rasool Ghulam3,Hamid Khan Abdul4,Saleem Iqra5,Shamim Saba1,Malik Arif1

Affiliation:

1. Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan

2. Department of Eastern Medicine, Government College University Faisalabad, Faisalabad, Pakistan

3. Department of Allied Health Sciences, Sargodha Medical College, University of Sargodha, Sargodha, Pakistan

4. Department of Eastern Medicine, University of Poonch, Rawalakot, Azad Jammu and Kashmir, Pakistan

5. Department of Pharmacy, Faculty of Medical and Health Sciences, University of Poonch, Rawalakot, Azad Jammu and Kashmir, Pakistan

Abstract

Antiviral drugs are a class of medicines particularly used for the treatment of viral infections. Drugs that combat viral infections are called antiviral drugs. Viruses are among the major pathogenic agents that cause number of serious diseases in humans, animals and plants. Viruses cause many diseases in humans, from self resolving diseases to acute fatal diseases. Developing strategies for the antiviral drugs are focused on two different approaches: Targeting the viruses themselves or the host cell factors. Antiviral drugs that directly target the viruses include the inhibitors of virus attachment, inhibitors of virus entry, uncoating inhibitors, polymerase inhibitors, protease inhibitors, inhibitors of nucleoside and nucleotide reverse transcriptase and the inhibitors of integrase. The inhibitors of protease (ritonavir, atazanavir and darunavir), viral DNA polymerase (acyclovir, tenofovir, valganciclovir and valacyclovir) and of integrase (raltegravir) are listed among the Top 200 Drugs by sales during 2010s. Still no effective antiviral drugs are available for many viral infections. Though, there are a couple of drugs for herpesviruses, many for influenza and some new antiviral drugs for treating hepatitis C infection and HIV. Action mechanism of antiviral drugs consists of its transformation to triphosphate following the viral DNA synthesis inhibition. An analysis of the action mechanism of known antiviral drugs concluded that they can increase the cell’s resistance to a virus (interferons), suppress the virus adsorption in the cell or its diffusion into the cell and its deproteinisation process in the cell (amantadine) along with antimetabolites that causes the inhibition of nucleic acids synthesis. This review will address currently used antiviral drugs, mechanism of action and antiviral agents reported against COVID-19.

Publisher

SAGE Publications

Subject

Pharmacology,Immunology,Immunology and Allergy

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