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Viral Hepatitis I: Introduction

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Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion...
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Post-approval, manufacturers may modify an approved new or generic drug product. Such modifications can encompass alterations in the Active Pharmaceutical Ingredient (API), manufacturing process, formulation, batch size, manufacturing site, and container closure system (FDA Guidance for Industry, April 2004). Often, a drug product may undergo multiple changes.These modifications require careful evaluation to determine their potential impact on the drug product's identity, strength, quality,...
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Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver.
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Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to...
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Sofosbuvir: first global approval.

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Sofosbuvir, an oral hepatitis C virus treatment, has achieved US approval and European recommendations. This nucleotide analogue inhibits viral polymerase, marking a significant milestone in treating chronic hepatitis C.

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Area of Science:

  • Hepatology
  • Virology
  • Pharmaceutical Development

Background:

  • Chronic hepatitis C is a significant global health concern.
  • Current treatment options for hepatitis C have limitations.
  • Sofosbuvir represents a novel therapeutic approach targeting the hepatitis C virus NS5B polymerase.

Purpose of the Study:

  • To summarize the key developmental milestones of sofosbuvir.
  • To highlight the regulatory approvals and recommendations for sofosbuvir in treating chronic hepatitis C.

Main Methods:

  • Review of preclinical and clinical development data for sofosbuvir.
  • Analysis of regulatory submissions and approvals in the US and Europe.

Main Results:

  • Sofosbuvir, a nucleotide analogue inhibitor of the hepatitis C virus NS5B polymerase, has been developed for oral administration.
  • Oral sofosbuvir received US approval as part of a combination antiviral regimen for chronic hepatitis C.
  • The European Medicines Agency's Committee for Medicinal Products for Human Use recommended approval of sofosbuvir for chronic hepatitis C treatment.

Conclusions:

  • Sofosbuvir's development has led to its first regulatory approval for chronic hepatitis C.
  • This marks a significant advancement in the treatment landscape for hepatitis C virus infection.