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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Foscarnet salvage therapy for patients with late-stage HIV disease and multiple drug resistance.

OBJECTIVE: To evaluate the efficacy of foscarnet on HIV infection in patients with late-stage HIV disease and multiple drug resistance. METHODS: Three drugs experienced patients with plasma viral load (pVL) > 50,000 copies/ml and CD4+ T-cell counts < 100/mm3 were eligible for this open-label, single-arm, add-on pilot study. Foscarnet induction therapy consisted of 5 g intravenously twice daily for 6 weeks, in addition to a stable antiretroviral regimen. Patients with at least 1 log10 decrease in pVL at week 6 (W6), were given foscarnet 5 g intravenously twice daily on two consecutive days each week. Primary endpoint was the virological response rate at W6. RESULTS: Eleven patients were enrolled with a median baseline pVL at 5.16 log10 copies/ml, median CD4+ T-cell count at 10/mm3 and median number of mutations of 9, 2 and 12 associated with resistance to nucleoside reverse transcriptase inhibitors (NRTIs), non-NRTIs and protease inhibitors, respectively. One patient discontinued foscarnet at W2 because of renal toxicity. In an intent-to-treat analysis, the median change in pVL from baseline was -1.99 log10 copies/ml at W2 and -1.79 log10 copies/ml at W6. Eight out of eleven patients had a fall in pVL of at least 1 log10 at W6, and six started maintenance therapy. The median fall in pVL after 12 weeks of maintenance therapy was -0.85 log10 copies/ml in the four patients who reached W12, and the median increase of CD4+ T-cell count was 60/mm3. CONCLUSION: In patients with HIV mutations conferring resistance to all antiretroviral drug classes, foscarnet markedly reduced plasma HIV load and improved immunological status.[1]


  1. Foscarnet salvage therapy for patients with late-stage HIV disease and multiple drug resistance. Canestri, A., Ghosn, J., Wirden, M., Marguet, F., Ktorza, N., Boubezari, I., Dominguez, S., Bossi, P., Caumes, E., Calvez, V., Katlama, C. Antivir. Ther. (Lond.) (2006) [Pubmed]
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