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  • Title: Impact of GB virus type C infection on mother-to-child HIV transmission in the Women and Infants Transmission Study Cohort.
    Author: Handelsman E, Cheng I, Thompson B, Hershow R, Mofenson LM, Hollinger FB, Chen KT, Burchett SK, Klinzman D, Stapleton JT, Women and Infants Transmission Study Group (WITS).
    Journal: HIV Med; 2007 Nov; 8(8):561-7. PubMed ID: 17944690.
    Abstract:
    BACKGROUND: GB virus type C (GBV-C) viraemia is associated with a beneficial outcome in HIV-infected individuals in several though not all studies. GBV-C viraemia was examined in a matched case-control study of 133 HIV-infected pregnant women who transmitted HIV to their infants ('cases') and 266 non-transmitting controls. METHODS: HIV-infected children and controls were pair-matched for high-risk delivery, race and year of delivery. GBV-C status was determined in maternal plasma samples obtained at or within 3 months of delivery. RESULTS: Pregnant women with GBV-C viraemia (11% of those studied) had lower HIV RNA levels (P=0.01) and higher CD4 percentages (P=0.0006) [corrected] than women without GBV-C. A trend towards decreased mother-to-child transmission in the multivariate analysis was observed among GBV-C viraemic women delivering after highly active antiretroviral therapy (HAART) became available [odds ratio (OR) 0.30, 95% confidence interval (CI) 0.08-1.05; P=0.06], but not in women delivering prior to the widespread use of HAART. CONCLUSIONS: GBV-C viraemia was associated with a beneficial effect on CD4 percentage and HIV RNA level in these pregnant women, and was also associated with a trend towards reduced risk of mother-to-child HIV transmission among women after HAART became available. Further studies with larger or multiple cohorts are necessary to assess possible benefits in this population.
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