These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: HCV kinetics, quasispecies, and clearance in treated HCV-infected and HCV/HIV-1-coinfected patients with hemophilia.
    Author: Shire NJ, Horn PS, Rouster SD, Stanford S, Eyster ME, Sherman KE, Multicenter Hemophilia Cohort HCV Study Group.
    Journal: Hepatology; 2006 Nov; 44(5):1146-57. PubMed ID: 17058240.
    Abstract:
    Hepatitis C virus (HCV) treatment response rates remain low in HCV/HIV-1-coinfected individuals compared with those with HCV alone. Persons with inherited coagulation disorders have high rates of HCV and HIV-1 infection, but HCV treatment trials in this patient population are scarce. We hypothesized that differences by infection status in HCV viral kinetics would be associated with differences in HCV quasispecies complexity over time and with treatment response disparities. Coinfected and monoinfected patients were enrolled in a treatment trial for pegylated-interferon alpha-2a (peg-IFN) + ribavirin. Patients were treated for 48 weeks and followed for an additional 24. Quantitative HCV RNA was tested at multiple times during and after treatment. Viral kinetic parameters associated with response were estimated with a mathematical model. Quasispecies emergence was determined via heteroduplex complexity assay. Twenty-two patients were HCV RNA-positive at baseline, with no significant demographic or virological differences by infection status. Five of eleven (45%) of monoinfected and 3 of 11 (27%) of coinfected patients achieved sustained viral response (SVR). Peg-IFN efficacy (epsilon) of 90% or greater was associated with probability of end-of-treatment response (ETR) (P = .001) and SVR (P = .06). Patients with SVR had lower baseline quasispecies complexity than those without SVR (P = .07). Those with epsilon of 90% or greater also had lower baseline complexity (P = .07). Coinfection status mediated changes in complexity over time (P = .04). In conclusion, low pretreatment quasispecies complexity may predict peg-IFN response; early peg-IFN response is critical for sustained HCV clearance and is altered in coinfection. Further studies are warranted.
    [Abstract] [Full Text] [Related] [New Search]