Safety, Tolerance, Pharmacokinetic and Antiviral Study of Amdoxovir in Combination With Zidovudine in Adults With HIV

Summary

The purpose of this study is to determine the short term safety, tolerance, and antiviral effect of zidovudine (AZT) and amdoxovir (AMDX, DAPD) in combination, and whether the dosage for AZT can be reduced, potentially decreasing side effects, while maintaining antiviral effects. Study hypothesis: DADP in combination with AZT is safe and effective, and AZT dosing may be reduced, resulting in lower levels of AZT-monophosphate associated with toxicity and maintaining levels of AZT-triphosphate associated with efficacy.

Timeline

Start

2007-02

Primary completion

—

Completion

2007-05

Publications

• Background Barry MG, Khoo SH, Veal GJ, Hoggard PG, Gibbons SE, Wilkins EG, Williams O, Breckenridge AM, Back DJ. The effect of zidovudine dose on the formation of intracellular phosphorylated metabolites. AIDS. 1996 Oct;10(12):1361-7. doi: 10.1097/00002030-199610000-00008.
• Background Bazmi HZ, Hammond JL, Cavalcanti SC, Chu CK, Schinazi RF, Mellors JW. In vitro selection of mutations in the human immunodeficiency virus type 1 reverse transcriptase that decrease susceptibility to (-)-beta-D-dioxolane-guanosine and suppress resistance to 3'-azido-3'-deoxythymidine. Antimicrob Agents Chemother. 2000 Jul;44(7):1783-8. doi: 10.1128/AAC.44.7.1783-1788.2000.
• Background Parikh UM, Bacheler L, Koontz D, Mellors JW. The K65R mutation in human immunodeficiency virus type 1 reverse transcriptase exhibits bidirectional phenotypic antagonism with thymidine analog mutations. J Virol. 2006 May;80(10):4971-7. doi: 10.1128/JVI.80.10.4971-4977.2006.
• Background Thompson MA, Kessler HA, Eron JJ Jr, Jacobson JM, Adda N, Shen G, Zong J, Harris J, Moxham C, Rousseau FS; DAPD-101 Study Group. Short-term safety and pharmacodynamics of amdoxovir in HIV-infected patients. AIDS. 2005 Oct 14;19(15):1607-15. doi: 10.1097/01.aids.0000186822.68606.05.
• Murphy RL, Kivel NM, Zala C, Ochoa C, Tharnish P, Mathew J, Pascual ML, Schinazi RF. Antiviral activity and tolerability of amdoxovir with zidovudine in a randomized double-blind placebo-controlled study in HIV-1-infected individuals. Antivir Ther. 2010;15(2):185-92. doi: 10.3851/IMP1514.

Drugs

Indications