A Phase I Concentration-Controlled Trial to Assess the Safety, Tolerance, Pharmacokinetics and Development of Decreased HIV-1 Susceptibility to the Combination of Atevirdine Mesylate (U-87201E), Zidovudine (AZT), and Didanosine (ddI)

Summary

Part I: To determine the pharmacokinetic dose for atevirdine mesylate ( U-87201E ) when used in combination with zidovudine ( AZT ). To determine the pharmacokinetic profiles of U-87201E and AZT over a 12-week period. Part II: To determine whether or not decreased viral susceptibility to U-87201E develops when the drug is administered concomitantly with AZT for 12 weeks. Part III: To evaluate the pharmacokinetic effects of ddI/AZT/U-87201E therapy and to assess changes in viral susceptibility to U-87201E. Interest exists in the development of antiretroviral agents that possess different mechanisms of action from nucleoside analogs such as AZT. U-87201E is a non-nucleoside reverse transcriptase (RT) inhibitor that has demonstrated activity against HIV-1; however, an emerging characteristic of non-nucleoside RT inhibitors is the development of rapid resistance to HIV isolates. Whether this resistance can be prevented in the presence of nucleoside analogs such as AZT and ddI has yet to be determined.

Timeline

Start

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Primary completion

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Completion

1993-10

Publications

• Background Reichman RC, Morse GD, Demeter LM, Resnick L, Bassiakos Y, Fischl M, Para M, Powderly W, Leedom J, Greisberger C, et al. Phase I study of atevirdine, a nonnucleoside reverse transcriptase inhibitor, in combination with zidovudine for human immunodeficiency virus type 1 infection. ACTG 199 Study Team. J Infect Dis. 1995 Feb;171(2):297-304. doi: 10.1093/infdis/171.2.297.
• Background Morse G, Fischl M, Leedom J, Batts D, Cox S, Reichman R. Atevirdine (ATV) pharmacokinetics (PK) and dosage requirements during a concentration-targeted (CT) phase I study (ACTG 199). Int Conf AIDS. 1993 Jun 6-11;9(1):477 (abstract no PO-B26-2050)
• Background Morse GD, Reichman RC, Fischl MA, Para M, Leedom J, Powderly W, Demeter LM, Resnick L, Bassiakos Y, Timpone J, Cox S, Batts D. Concentration-targeted phase I trials of atevirdine mesylate in patients with HIV infection: dosage requirements and pharmacokinetic studies. The ACTG 187 and 199 study teams. Antiviral Res. 2000 Jan;45(1):47-58. doi: 10.1016/s0166-3542(99)00073-x.
• Background Reichman R, Fischl M, Para M, Powderly W, Timpone J, Bassiakos Y. Phase I study of atevirdine (ATV), a non-nucleoside reverse transcriptase inhibitor, given in combination with zidovudine (ZDV). The ACTG 199 Team. Int Conf AIDS. 1993 Jun 6-11;9(1):478 (abstract no PO-B26-2055)
• Background Demeter LM, Resnick L, Tarpley WG, Fischl M, Para M, Reichman RC. Prolonged sensitivity of HIV-1 isolates to atevirdine (ATV) in a phase 1 clinical trial of ATV and zidovudine (ZDV) (ACTG 199). The ACTG 199 Study Team. Int Conf AIDS. 1993 Jun 6-11;9(1):242 (abstract no PO-A26-0643)

Drugs

Indications