Abstract:
:Tipranavir is a non-peptidic HIV-1 protease inhibitor. It binds strongly and selectively, has a favourable resistance profile, and is administered orally twice daily with a subtherapeutic dosage of ritonavir in a 'boosted' regimen (TPV/r) in order to increase its bioavailability. Analysis of clinical isolates from treatment-experienced patients identified the following tipranavir resistance-associated HIV protease mutations: L10V, I13V, K20M/R/V, L33F, E35G, M36I, K43T, M46L, I47V, I54A/M/V, Q58E, H69K, T74P, V82L/T, N83D, I84V. In two large, well designed phase III trials in protease inhibitor-experienced, HIV-infected patients, the RESIST (Randomised Evaluation of Strategic Intervention in multidrug reSistant patients with Tipranavir)-1 and -2 studies, oral TPV/r 500mg/200mg twice daily achieved a significantly better virological response after 24 weeks than standard ritonavir-boosted protease inhibitors. This held true for the proportion of patients achieving a >or=1 log(10) decrease in plasma HIV-RNA levels (viral load) [42% and 41% vs 22% and 15%; both p < 0.0001; primary endpoint] and other virological parameters (the proportion of patients with undetectable viral load and total viral load reduction). In addition, a significantly larger increase in CD4+ cell count was achieved with TPV/r than comparator regimens in these trials. The most common adverse events in clinical trials of tipranavir were gastrointestinal. The incidence of treatment discontinuation because of adverse events in the RESIST trials was 8% (pooled data).
journal_name
Drugsjournal_title
Drugsauthors
Croom KF,Keam SJdoi
10.2165/00003495-200565120-00005subject
Has Abstractpub_date
2005-01-01 00:00:00pages
1669-77; discussion 1678-9issue
12eissn
0012-6667issn
1179-1950pii
65125journal_volume
65pub_type
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