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This study investigated whether a calibrated reduction in antiretroviral drug pressures could stabilize the evolution and the pathogenic potential of resistant HIV viruses.
In patients with HIV multidrug resistance, maintaining a failing full-dose HAART regimen usually results in significant drug toxicity and in continued accumulation of resistance mutations that can preclude future therapeutic options. In contrast, treatment interruption provokes the reemergence of wild-type virus with full replicative and pathogenic capacity. The researchers investigated whether a calibrated reduction in drug pressure could stabilize the evolution and the pathogenic potential of resistant virus.
A prospective pilot study was conducted in patients receiving protease inhibitor-based HAART with a resistance genotype predicting less than two active drugs according to the 2002 ANRS algorithm, CD4 counts over or equal to 100/mm3 and plasma HIV RNA below or equal to 5 log/ml. The treatment was low-dose IDV/RTV (200/100 BID) and 3TC 150mg BID. IDV doses were adjusted at week 4 to ensure a Cmin of 250+/-100ng/ml, which, based on a panel of multi-PI resistant viruses, was calculated to yield an inhibitory quotient (Cmin/IC50) of 0.50. Primary end-points were over 25% decrease in CD4 counts (immunological failure-IF), or over 0.7 log increase in plasma HIV RNA (virological failure-VF) at two consecutive monthly visits during the 24-week study. Inclusions were to stop when the total number of failures (VF+IF) reached 7
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Indinavir | Drug | |||
| Lamivudine | Drug | |||
| Ritonavir | Drug |
| Measure | Description | Time Frame |
|---|---|---|
| Decrease over 25% in CD4 counts (immunological failure-IF), or increase over 0.7 log in plasma HIV RNA (virological failure-VF) at two consecutive monthly visits during the 24-week study |
| Measure | Description | Time Frame |
|---|---|---|
| Development of an HIV-1-related AIDS defining event | ||
| Death | ||
| Change in CD4 cell count between baseline and week 24 |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Odile Launay, MD | Hopital Avicenne,Bobigny, Service de Médecine Interne | Principal Investigator |
| Dominique Costagliola | Inserm U720 | Study Chair |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Service de Medecine Interne hopital Avicenne | Bobigny | 93009 cedex | France |
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| ID | Term |
|---|---|
| D015658 | HIV Infections |
| ID | Term |
|---|---|
| D000086982 | Blood-Borne Infections |
| D003141 | Communicable Diseases |
| D007239 | Infections |
| D015229 | Sexually Transmitted Diseases, Viral |
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| ID | Term |
|---|---|
| D019469 | Indinavir |
| D019259 | Lamivudine |
| D019438 | Ritonavir |
| ID | Term |
|---|---|
| D011725 | Pyridines |
| D006573 | Heterocyclic Compounds, 1-Ring |
| D006571 | Heterocyclic Compounds |
| D016047 | Zalcitabine |
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| Change in plasma HIV-RNA level between baseline and week 4, week 8, week 12 and week 24 |
| Change in genotypic and phenotypic resistance between baseline and week 2 |
| D012749 | Sexually Transmitted Diseases |
| D016180 | Lentivirus Infections |
| D012192 | Retroviridae Infections |
| D012327 | RNA Virus Infections |
| D014777 | Virus Diseases |
| D000091662 | Genital Diseases |
| D000091642 | Urogenital Diseases |
| D007153 | Immunologic Deficiency Syndromes |
| D007154 | Immune System Diseases |
| D003841 |
| Deoxycytidine |
| D003562 | Cytidine |
| D011741 | Pyrimidine Nucleosides |
| D011743 | Pyrimidines |
| D003853 | Deoxyribonucleosides |
| D009705 | Nucleosides |
| D009706 | Nucleic Acids, Nucleotides, and Nucleosides |
| D015224 | Dideoxynucleosides |
| D013844 | Thiazoles |
| D013457 | Sulfur Compounds |
| D009930 | Organic Chemicals |
| D001393 | Azoles |