title: Mitigation of antiretroviral-induced hyperlipidemia by hepatitis C virus co-infection.
abstract: BACKGROUND
  Hyperlipidemia is a recognized complication of HIV antiretroviral therapy. The interactions between HIV, hepatitis C virus (HCV), antiretroviral agents and lipids are not well understood.
  
  
  METHODS
  We evaluated the lipid data of patients receiving antiretroviral therapy at the Ottawa Hospital Immunodeficiency Clinic between January 1996 and June 2005 using a clinic database.
  
  
  RESULTS
  A total of 357 HIV-mono-infected and 115 HIV/HCV-co-infected patients were evaluated. The mean changes in total cholesterol (mmol/l) from baseline to months 6 and 12 were 1.00 and 1.24 in HIV mono-infection, and 0.19 (P < 0.001) and 0.01 (P < 0.001) in HIV/HCV, respectively. Metabolic complications including hypercholesterolemia resulted in the interruption of HAART in HIV mono-infection (8%), but not in those with HIV/HCV (< 1%; P < 0.001). Eight per cent of HIV-mono-infected and no co-infected patients initiated lipid-lowering therapy while on their initial course of HAART (P < 0.001). Total cholesterol increased by 0.85 mmol/l in HIV/HCV-co-infected recipients of interferon-based HCV treatment achieving a sustained virological response (SVR), but did not change in those who did not achieve a SVR.
  
  
  CONCLUSIONS
  HCV co-infection appears to confer a degree of protection from HAART-related lipid complications. The mechanism of this finding deserves evaluation. The implications of this observation for long-term cardiovascular disease risk remains a pressing issue.
authors.affiliation: Division of Infectious Diseases, The Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada. ccooper@ottawahospital.on.ca
authors.forename: Curtis L
authors.initials: CL
authors.lastname: Cooper
authors.forename: Edward
authors.initials: E
authors.lastname: Mills
authors.forename: Jonathan B
authors.initials: JB
authors.lastname: Angel
mesh_terms: D000328:Adult; D019380:Anti-HIV Agents / Q000627:therapeutic use*; D023241:Antiretroviral Therapy, Highly Active; D016009:Chi-Square Distribution; D002784:Cholesterol / Q000097:blood; D018450:Disease Progression; D005260:Female; D015658:HIV Infections / Q000097:blood / Q000150:complications* / Q000188:drug therapy; D015497:HIV-1; D016174:Hepacivirus; D019698:Hepatitis C, Chronic / Q000097:blood / Q000150:complications* / Q000188:drug therapy; D006801:Humans; D006949:Hyperlipidemias / Q000139:chemically induced* / Q000821:virology; D007372:Interferons / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged
chemical_list: D019380:Anti-HIV Agents; D007372:Interferons; D002784:Cholesterol