Interferon-free regimens: the near future, the likely and the not so likely

Mitchell L Shiffman1

  • 1Liver Institute of Virginia, Bon Secours Health System, Newport News, VA 23602, USA. mitchell_shiffman@bshsi.org

Clinics in Liver Disease
|August 27, 2011
PubMed

Insights

Interferon therapy has advanced hepatitis C virus (HCV) treatment over two decades. This review explores interferon

Area of Science:

  • Hepatology and Virology
  • Immunology
  • Antiviral Therapy

Background:

  • Chronic hepatitis C virus (HCV) infection remains a significant global health concern.
  • Interferon therapy, introduced over 20 years ago, marked a milestone in HCV treatment.
  • Sustained virologic response (SVR) is the primary goal of HCV treatment.

Purpose of the Study:

  • To review the proposed mechanisms of interferon's antiviral action against HCV.
  • To analyze how interferon contributes to achieving SVR in chronic HCV patients.
  • To speculate on the potential for future all-oral antiviral regimens to achieve HCV cure.

Main Methods:

  • Literature review of studies on interferon's mechanism of action in HCV.
  • Analysis of clinical data demonstrating interferon's efficacy in achieving SVR.
  • Speculative analysis based on current understanding of HCV virology and antiviral development.

Main Results:

  • Interferon is believed to suppress HCV through multiple immunomodulatory and direct antiviral pathways.
  • These mechanisms contribute to the achievement of SVR in a subset of treated patients.
  • The review highlights the evolution of HCV treatment strategies.

Conclusions:

  • Understanding interferon's mechanisms provides insights into HCV pathogenesis and treatment.
  • Future all-oral antiviral therapies hold promise for a potential "cure" for HCV.
  • Continued research is essential to eradicate HCV globally.

Related Concept Videos

Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
Inhibitors Of Virion Release01:25

Inhibitors Of Virion Release

Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...
Microorganisms in Medicine and Therapeutics01:29

Microorganisms in Medicine and Therapeutics

Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
Antiviral Nucleoside Inhibitors01:22

Antiviral Nucleoside Inhibitors

Antiviral Nucleoside InhibitorsAntiviral nucleoside inhibitors are structural analogs of natural nucleosides that interfere with viral DNA or RNA synthesis. These compounds selectively target viral polymerases due to their resemblance to host nucleosides, thereby disrupting viral genome replication.Mechanism of Acyclovir ActionAcyclovir is a guanosine analog with a three-carbon acyclic side chain. It selectively targets herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2 (HSV-2),...
Drug Products: Biologics, Biosimilars and Interchangeables01:28

Drug Products: Biologics, Biosimilars and Interchangeables

Biologics, derived from living sources such as humans, animals, or microorganisms, represent a significant category of pharmaceuticals. These complex molecules, developed through advanced biotechnological methods or purified from natural sources, include essential medical treatments like insulin and growth hormones. The complexity of biologics arises from their large molecular structures and the intricate processes required for their production, making them distinct from conventional...
Inhibitors of Virion Maturation and Assembly01:19

Inhibitors of Virion Maturation and Assembly

As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...