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Pathway Description
Dasabuvir Action Pathway
Homo sapiens
Drug Action Pathway
Dasabuvir is a direct-acting antiviral agent used to treat specific hepatitis C virus (HCV) infections in combination with other antiviral agents, Ombitasvir, Paritaprevir, and Ritonavir.
Hepatitis C virus lipoviroparticles enter target hepatocytes via receptor-mediated endocytosis. The lipoviroparticles attach to LDL-R and SR-B1, and then the virus binds to CD81 and subsequently claudin-1 and occludin, which mediate the late steps of viral entry. The virus is internalized by clathrin-dependent endocytosis. RNA is released from the mature Hepatitis C virion and translated at the rough endoplasmic reticulum into a single Genome polyprotein. The genome polyprotein is cleaved by host and viral proteases into 10 viral proteins. The nucleocapsid protein core and the two envelope proteins E1 and E2 form the N terminus of the polyprotein and are the structural components of HCV virions. The precursor also gives rise to the viroporin p7 and six non-structural (NS) proteins.
Dasabuvir is an inhibitor of the Hepatitis C Virus (HCV) Nonstructural protein 5B, which is an RNA-dependent RNA polymerase. RNA polymerase is required for viral RNA replication and assembly of HCV virions. By binding to nonstructural protein 5B outside of the active site of the enzyme, dasabuvir induces a conformational change. Viral RNA replication complexes localize to lipid raft-containing, detergent-resistant membranes created by the viral protein NS4B. For full viral replication and maturation, nonstructural protein 5B is required so viral RNA replication cannot occur. Envelope glycoproteins are acquired through budding into the endoplasmic reticulum lumen. The immature, non-infective virions are released via the cellular golgi apparatus.
References
Dasabuvir Pathway References
Herker E, Ott M: Unique ties between hepatitis C virus replication and intracellular lipids. Trends Endocrinol Metab. 2011 Jun;22(6):241-8. doi: 10.1016/j.tem.2011.03.004. Epub 2011 Apr 15.
Pubmed: 21497514
Gentile I, Buonomo AR, Borgia G: Dasabuvir: A Non-Nucleoside Inhibitor of NS5B for the Treatment of Hepatitis C Virus Infection. Rev Recent Clin Trials. 2014;9(2):115-23. doi: 10.2174/1574887109666140529222602.
Pubmed: 24882169
Trivella JP, Gutierrez J, Martin P: Dasabuvir : a new direct antiviral agent for the treatment of hepatitis C. Expert Opin Pharmacother. 2015 Mar;16(4):617-24. doi: 10.1517/14656566.2015.1012493. Epub 2015 Feb 9.
Pubmed: 25665437
Mantry PS, Pathak L: Dasabuvir (ABT333) for the treatment of chronic HCV genotype I: a new face of cure, an expert review. Expert Rev Anti Infect Ther. 2016;14(2):157-65. doi: 10.1586/14787210.2016.1120668. Epub 2015 Dec 17.
Pubmed: 26567871
Bagaglio S, Uberti-Foppa C, Morsica G: Resistance Mechanisms in Hepatitis C Virus: implications for Direct-Acting Antiviral Use. Drugs. 2017 Jul;77(10):1043-1055. doi: 10.1007/s40265-017-0753-x.
Pubmed: 28497432
Wishart DS, Feunang YD, Guo AC, Lo EJ, Marcu A, Grant JR, Sajed T, Johnson D, Li C, Sayeeda Z, Assempour N, Iynkkaran I, Liu Y, Maciejewski A, Gale N, Wilson A, Chin L, Cummings R, Le D, Pon A, Knox C, Wilson M: DrugBank 5.0: a major update to the DrugBank database for 2018. Nucleic Acids Res. 2018 Jan 4;46(D1):D1074-D1082. doi: 10.1093/nar/gkx1037.
Pubmed: 29126136
Jin Z, Leveque V, Ma H, Johnson KA, Klumpp K: Assembly, purification, and pre-steady-state kinetic analysis of active RNA-dependent RNA polymerase elongation complex. J Biol Chem. 2012 Mar 23;287(13):10674-10683. doi: 10.1074/jbc.M111.325530. Epub 2012 Feb 2.
Pubmed: 22303022
Moradpour D, Penin F, Rice CM: Replication of hepatitis C virus. Nat Rev Microbiol. 2007 Jun;5(6):453-63. doi: 10.1038/nrmicro1645. Epub 2007 May 8.
Pubmed: 17487147
Rigat K, Wang Y, Hudyma TW, Ding M, Zheng X, Gentles RG, Beno BR, Gao M, Roberts SB: Ligand-induced changes in hepatitis C virus NS5B polymerase structure. Antiviral Res. 2010 Nov;88(2):197-206. doi: 10.1016/j.antiviral.2010.08.014. Epub 2010 Sep 9.
Pubmed: 20813137
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