title: Viral resistance in hepatitis B: prevalence and management.
abstract: Hepatitis B is a DNA virus affecting hundreds of millions of individuals worldwide. As the clinical sequelae of cirrhosis and hepatocellular cancer are increasingly recognized to be related to viral levels, the impetus increases to offer treatment to those previously not treated. With the development of more robust antivirals with reasonable safety profiles, long-term treatment is becoming more common. The oral nucleos(t)ide analogs have become the preferred first-line therapies for most genotypes of hepatitis B. Five are now available, all with different potencies and resistance profiles. Long-term data spanning several years are now available for most compounds in this arena. This article focuses on the common natural variants and those secondary to nucleos(t)ide therapy, as well as diagnostic methods to detect resistance.
authors.affiliation: David Geffen School of Medicine at UCLA, Hepatology and Liver Transplantation, Cedars-Sinai Medical Center, Suite 1060, Los Angeles, CA 90048, USA. Fred.Poordad@cshs.org
authors.forename: Fred
authors.initials: F
authors.lastname: Poordad
authors.forename: Grace M
authors.initials: GM
authors.lastname: Chee
mesh_terms: D000225:Adenine / Q000031:analogs & derivatives / Q000627:therapeutic use; D000998:Antiviral Agents / Q000627:therapeutic use*; D024882:Drug Resistance, Viral / Q000235:genetics; D005820:Genetic Testing; D005838:Genotype; D006147:Guanine / Q000031:analogs & derivatives / Q000627:therapeutic use; D006509:Hepatitis B / Q000188:drug therapy* / Q000453:epidemiology; D006801:Humans; D019259:Lamivudine / Q000627:therapeutic use; D009705:Nucleosides / Q000627:therapeutic use; D063065:Organophosphonates / Q000627:therapeutic use; D010641:Phenotype; D011744:Pyrimidinones / Q000627:therapeutic use; D000077712:Telbivudine; D000068698:Tenofovir; D013936:Thymidine / Q000031:analogs & derivatives
chemical_list: D000998:Antiviral Agents; D009705:Nucleosides; D063065:Organophosphonates; D011744:Pyrimidinones; D000077712:Telbivudine; D019259:Lamivudine; C413685:entecavir; D006147:Guanine; C053001:adefovir; D000068698:Tenofovir; D000225:Adenine; D013936:Thymidine