PMID- 26066346 OWN - NLM STAT- MEDLINE DCOM- 20160516 LR - 20220316 IS - 1758-2652 (Electronic) IS - 1758-2652 (Linking) VI - 18 IP - 1 DP - 2015 TI - PRINCE-1: safety and efficacy of atazanavir powder and ritonavir liquid in HIV-1-infected antiretroviral-naive and -experienced infants and children aged >/=3 months to <6 years. PG - 19467 LID - 10.7448/IAS.18.1.19467 [doi] LID - 19467 [doi] AB - INTRODUCTION: PRINCE-1 is an ongoing prospective, international, multicentre, nonrandomized, two-stage clinical trial assessing safety and efficacy of once-daily atazanavir (ATV) powder boosted with ritonavir (RTV) liquid plus optimized dual nucleoside reverse-transcriptase inhibitor (NRTI) background therapy in antiretroviral (ARV)-naive and -experienced children with HIV-1 infection aged >/=3 months to <6 years. METHODS: Children with HIV-1 infection without prior ATV exposure and with a screening HIV-1 RNA >/=1000 copies/mL were enrolled. The dosing of ATV powder, boosted with 80 mg RTV liquid, was based on three baseline weight bands (5 to <10 kg=150 mg, 10 to <15 kg=200 mg and 15 to <25 kg=250 mg). RESULTS: Of the 56 treated patients, 46 completed 48 weeks of therapy, 67.9% were from Africa and 60.7% were ART-naive. Median ages at baseline were 6, 35 and 55 months, and proportions with HIV-1 RNA >100,000 were 85.7, 52.6 and 25% in the three baseline weight bands, respectively. No unexpected safety events occurred and no deaths were reported. Over 48 weeks, upper respiratory tract infections, diarrhoea, vomiting and Grade 3 to 4 hyperbilirubinaemia occurred in 35.7, 35.7, 28.6, and 9.4% of patients, respectively; five patients (8.9%) discontinued due to adverse events (AEs); and 11 patients (19.6%) experienced serious adverse events. At Week 48, using a modified intent-to-treat analysis (two patients were excluded because they switched to ATV capsules before Week 48), 61.1 and 74.1% of patients overall had an HIV-1 RNA level <50 copies/mL and <400 copies/mL, respectively. Virologic suppression rates increased across the lowest to highest baseline weight bands (47.6, 68.4 and 71.4% had HIV-1 RNA <50 copies/mL, and 66.7, 73.7 and 85.7% had HIV-RNA <400 copies/mL, respectively) but did not differ meaningfully between ARV-naive and -experienced patients. Overall, the median change from baseline in CD4 cell count was +363 cells/mm(3), and the median change from baseline in CD4 percent was +7.5%. CONCLUSIONS: ATV powder boosted with RTV liquid once daily plus optimized dual NRTI background therapy was effective and well tolerated in this ART-naive or -experienced paediatric population aged >/=3 months to <6 years. No unexpected safety findings compared with those from previous ATV paediatric and adult studies were identified. FAU - Strehlau, Renate AU - Strehlau R AD - Rahima Moosa Mother & Child Hospital, Johannesburg, South Africa; FAU - Donati, Anamaria Pena AU - Donati AP AD - Hospital Sotero Del Rio, Santiago, Chile. FAU - Arce, Pedro Martinez AU - Arce PM AD - Hospital Civil Fray Antonio Alcade, Guadalajara, Mexico. FAU - Lissens, Jurgen AU - Lissens J AD - Bristol-Myers Squibb Research and Development, Braine L'Alleud, Belgium. FAU - Yang, Rong AU - Yang R AD - Bristol-Myers Squibb Research and Development, Wallingford, CT, USA. FAU - Biguenet, Sophie AU - Biguenet S AD - AbbVie, North Chicago, IL, USA. FAU - Cambilargiu, Daniela AU - Cambilargiu D AD - Bristol-Myers Squibb Research and Development, Buenos Aires, Argentina. FAU - Hardy, Helene AU - Hardy H AD - Bristol-Myers Squibb Research and Development, Princeton, NJ, USA. FAU - Correll, Todd AU - Correll T AD - Bristol-Myers Squibb Research and Development, Princeton, NJ, USA; todd.correll@bms.com. LA - eng PT - Clinical Trial, Phase III PT - Journal Article PT - Multicenter Study PT - Research Support, Non-U.S. Gov't DEP - 20150610 PL - Switzerland TA - J Int AIDS Soc JT - Journal of the International AIDS Society JID - 101478566 RN - 0 (Anti-HIV Agents) RN - 4MT4VIE29P (Atazanavir Sulfate) RN - O3J8G9O825 (Ritonavir) SB - IM MH - Anti-HIV Agents/*administration & dosage MH - Atazanavir Sulfate/*administration & dosage MH - Child MH - Child, Preschool MH - Drug Therapy, Combination MH - Female MH - HIV Infections/*drug therapy MH - *HIV-1/drug effects MH - Humans MH - Infant MH - Male MH - Prospective Studies MH - Ritonavir/*administration & dosage PMC - PMC4463476 OTO - NOTNLM OT - HIV-1 infection OT - antiretroviral therapy OT - atazanavir powder OT - child OT - infant OT - paediatric formulations OT - ritonavir liquid EDAT- 2015/06/13 06:00 MHDA- 2016/05/18 06:00 PMCR- 2015/06/10 CRDT- 2015/06/13 06:00 PHST- 2014/09/23 00:00 [received] PHST- 2015/03/05 00:00 [revised] PHST- 2015/04/13 00:00 [accepted] PHST- 2015/06/13 06:00 [entrez] PHST- 2015/06/13 06:00 [pubmed] PHST- 2016/05/18 06:00 [medline] PHST- 2015/06/10 00:00 [pmc-release] AID - 19467 [pii] AID - 10.7448/IAS.18.1.19467 [doi] PST - epublish SO - J Int AIDS Soc. 2015 Jun 10;18(1):19467. doi: 10.7448/IAS.18.1.19467. eCollection 2015.