Abstract Respiratory syncytial virus (RSV) may cause severe lower respiratory tract disease in older adults and there is currently no approved vaccine. We assessed the safety and reactogenicity of an Ad26.RSV.preF-based vaccine in a randomized, double-blind, placebo-controlled Phase 2b proof-of-concept trial in adults aged ≥65 years (CYPRESS; NCT03982199). Prior to the RSV season, participants were randomized 1:1 to receive an Ad26.RSV.preF-based vaccine or placebo. Solicited adverse events (AEs; fatigue, headache, nausea, myalgia, fever, injection site reactions) and unsolicited AEs were assessed from time of vaccination to Day 8 and Day 29, respectively, in a safety subset of 695 participants (vaccine, n=348; placebo, n=347). All participants were followed for serious AEs (SAEs) until the end of the RSV season or 6 months after vaccination, whichever occurred later. A total of 5728 participants were randomized and received vaccine or placebo (n=2891 in each group). In the safety subset, the frequency of solicited AEs and Grade ≥3 solicited AEs was 51.4% and 3.2% in the vaccine group and 20.2% and 0.6% in the placebo group, respectively. The most frequent solicited AEs in the vaccine group were fatigue, myalgia, headache, and injection site pain/tenderness. The rates of unsolicited AEs and Grade ≥3 unsolicited AEs were similar between the vaccine (16.7% and 1.7%) and placebo (14.4% and 1.4%) groups. In the overall study population, the rate of SAEs was similar between groups (vaccine, 4.6%; placebo, 4.7%); none were considered related to the vaccine. The Ad26.RSV.preF-based vaccine was safe and well tolerated in adults aged ≥65 years.
Purpose of the studyIn the randomised, controlled, Phase III TITAN trial, at week 96, significantly more patients on darunavir coadministered with low-dose ritonavir (DRV/r) than on lopinavir/r (LPV/r) achieved HIV-1 RNA <400 copies/mL (67.5% vs. 59.5%;difference 8%, 95% CI 0.1-15.8),confirming non-inferiority (p < 0.001) and superiority of DRV/r over LPV/r (p = 0.034).A detailed resistance characterisation of virological failures (VFs) was performed.
Hintergrund/Ziele: Telaprevir (T) ist ein sich in der Entwicklung befindlicher HCV NS3·4A Proteaseinhibitor zur Behandlung der chronischen Hepatitis C Infektion in Kombination mit Peginterferon (P) und Ribavirin (R). T wird hauptsächlich über die Faeces ausgeschieden, bei minimaler renaler Exkretion. Schwere Niereninsuffizienz (NI) kann die extrarenale Elimination indirekt beeinflussen. Die Studie untersuchte den Einfluss von schwerer Niereninsuffizienz auf die Pharmakokinetik von T.
Abstract Background Respiratory syncytial virus (RSV) can cause serious lower respiratory tract disease (LRTD) among older adults. There is no licensed RSV vaccine. In CYPRESS (a randomized, double-blind, placebo-controlled, phase 2b proof-of concept trial; NCT03982199), an Ad26.RSV.preF/RSV preF protein vaccine demonstrated 80.0% efficacy for prevention of RSV LRTD and 69.8% efficacy for prevention of any RSV acute respiratory infection in adults aged ≥65 years through the first RSV season. This study evaluated the durability of immune responses elicited by Ad26.RSV.preF/RSV preF protein after two RSV seasons (up to 1.5 years post-vaccination) in the overall study population and in groups of participants stratified by age and risk level for severe RSV LRTD. Methods Participants (N=5782) were randomized 1:1 to receive vaccine or placebo before the RSV season. The primary endpoint was first occurrence of RSV LRTD. RSV A2 virus neutralizing antibodies (VNAs; through Day 365), RSV preF binding antibodies (through Day 533), and RSV-F–specific IFN-γ enzyme-linked immune absorbent spot (ELISpot; through Day 533), were evaluated in an immunogenicity subset (n=195; ages 65–74 years: n=141; 75–84 years: n=47; ≥85 years: n=6; increased risk [chronic heart or lung disease]: n=48; non-increased risk: n=147). Results In the vaccine group of the immunogenicity subset, RSV A2 VNAs peaked at Day 15 and were maintained at 2.8-fold over baseline at 1 year. Similarly, RSV preF-specific binding antibodies peaked at Day 15 and were maintained at 2.1-fold above baseline at 1.5 years. Median RSV-F–specific IFN-γ T-cell frequency increased from 34 spot-forming cells (SFC)/106 peripheral blood mononuclear cells (PBMCs) at baseline to 143 SFC/106 PBMCs at 1.5 years. Comparable immune responses were observed in age/risk subgroups. No relevant changes were observed in the placebo group at any time point. Pre-existing Ad26 VNAs did not appear to impact RSV-specific immune response durability. Conclusion Ad26.RSV.preF/RSV preF protein vaccine was efficacious and elicited robust, durable (to at least 1.5 years) humoral and cellular immune responses in adults aged ≥65 years, older participants (≥75 years), and in participants with increased risk for severe RSV LRTD. Disclosures Christy A. Comeaux, MD, PhD, Janssen Vaccines & Prevention B.V.: Employee Ann R. Falsey, MD, BioFire Diagnostics: Grant/Research Support|Janssen: Grant/Research Support|Merck Sharp & Dohme: Grant/Research Support|Novavax: Advisor/Consultant|Pfizer: Grant/Research Support Kristi Williams, PhD, Janssen Research and Development: Employee John E. Ervin, MD, The Alliance for Multispecialty Research – KCM: Contractual agreement for conduct of study protocol Arangassery R. Bastian, PhD, Janssen Vaccines & Prevention BV: Employee Joris Menten, PhD, Janssen Infectious Diseases: Employee Els De Paepe, MSc, Janssen Infectious Diseases: employee Sjouke Vandenberghe, PhD, Janssen Infectious Diseases: Employee Eric K. H. Chan, PhD, Janssen Global Services, LLC: Employee Jerald Sadoff, MD, Janssen Vaccines & Prevention BV: Employee Macaya Douoguih, MD, MPH, Janssen Vaccines & Prevention B.V.: Employee Benoit Callendret, PhD, Janssen Vaccines & Prevention B.V.: Employee Esther Heijnen, MD, PhD, Janssen Vaccines & Prevention B.V.: Employee.
<i>Objective:</i> To investigate the potential for a pharmacokinetic interaction between darunavir (DRV, TMC114, Prezista®), indinavir (IDV, Crixivan®) and low-dose ritonavir (RTV, Norvir®). <i>Methods:</i> In three 7-day sessions, 17 HIV-negative healthy volunteers received treatment A (DRV/r 400/100 mg b.i.d.), treatment B (IDV/r 800/100 mg b.i.d.) and treatment C (DRV/r 400/100 mg b.i.d. + IDV 800 mg b.i.d.). On day 7, full pharmacokinetic profiles of DRV, IDV and RTV were determined. Safety and tolerability were also assessed. <i>Results:</i> Based on the least-squares means ratios, the steady-state exposure (area under the curve, AUC<sub>12h</sub>) and plasma concentrations (C<sub>min</sub> and C<sub>max</sub>) of IDV were increased by 23, 125 and 8%, respectively, when DRV was co-administered. The co-administration of IDV with DRV/r resulted in increases of 24, 44 and 11% for, respectively, DRV AUC<sub>12h</sub>, C<sub>min</sub> and C<sub>max</sub>, compared with administration of DRV/r alone. Eight volunteers discontinued due to an adverse event. Overall, adverse events and laboratory abnormalities were more commonly reported during treatments including IDV. <i>Conclusions:</i> When used in combination with DRV/r, dose adjustment of IDV from 800 mg b.i.d. to 600 mg b.i.d. may be warranted in cases of intolerance.
Since influenza and respiratory syncytial virus (RSV) carry significant burden in older adults with overlapping seasonality, vaccines for both pathogens would ideally be coadministered in this population. Here we evaluate the immunogenicity and safety of concomitant administration of Ad26.RSV.preF/RSV preF protein and high-dose seasonal influenza vaccine (Fluzone-HD) in adults ≥65 years old.
Abstract Respiratory syncytial virus (RSV) may cause serious lower respiratory tract disease (LRTD) in older adults, and there is currently no licensed vaccine. CYPRESS (NCT03982199) is a randomized, double-blind, placebo-controlled Phase 2b proof-of-concept trial of an Ad26.RSV.preF-based vaccine for the prevention of RSV-mediated LRTD in older adults. Adults aged ≥65 years were randomized 1:1 before the RSV season to receive Ad26.RSV.preF-based vaccine or placebo. Acute respiratory infection symptoms were collected through a patient eDiary and/or clinician assessment until the end of the RSV season. The primary endpoint was the first occurrence of RTPCR-confirmed RSV-mediated LRTD according to any of 3 case definitions: (1) ≥3 symptoms of lower respiratory tract infection (LRTI), (2) ≥2 symptoms of LRTI, or (3) ≥2 symptoms of LRTI or ≥1 symptom of LRTI with ≥1 systemic symptom. Immunogenicity was assessed in a subset of approximately 200 participants. A total of 2891 participants in each study arm received study treatment. Vaccine efficacy was 80% (94.2% CI, 52.2-92.9%), 75% (50.1-88.5%), and 69.8% (43.7-84.7%) for case definition 1, 2, and 3, respectively (all P <0.001). In the vaccine arm, geometric mean fold increase in antibody titers 14 days after vaccination was 13.5 for RSV neutralizing antibodies and 8.6 for RSV prefusion F-specific binding antibodies, and median frequency of RSV-F-specific INFγ T-cells increased from 34 to 444 SFC/10^6 PBMC; no relevant changes were observed in the placebo arm. The Ad26.RSV.preF-based vaccine was highly effective against RSV-mediated LRTD through the first RSV season and elicited robust immune responses in older adults.
Respiratory syncytial virus (RSV) is a significant cause of severe lower respiratory tract disease in children and older adults, but has no approved vaccine. This study assessed the potential of Ad26.RSV.preF to protect against RSV infection and disease in an RSV human challenge model.In this double-blind, placebo-controlled study, healthy adults aged 18-50 years were randomized 1:1 to receive 1 × 1011 vp Ad26.RSV.preF or placebo intramuscularly. Twenty-eight days postimmunization, volunteers were challenged intranasally with RSV-A (Memphis 37b). Assessments included viral load (VL), RSV infections, clinical symptom score (CSS), safety, and immunogenicity.Postchallenge, VL, RSV infections, and disease severity were lower in Ad26.RSV.preF (n = 27) vs placebo (n = 26) recipients: median VL area under the curve (AUC) quantitative real-time polymerase chain reaction: 0.0 vs 236.0 (P = .012; predefined primary endpoint); median VL-AUC quantitative culture: 0.0 vs 109; RSV infections 11 (40.7%) vs 17 (65.4%); median RSV AUC-CSS 35 vs 167, respectively. From baseline to 28 days postimmunization, geometric mean fold increases in RSV A2 neutralizing antibody titers of 5.8 and 0.9 were observed in Ad26.RSV.preF and placebo, respectively. Ad26.RSV.preF was well tolerated.Ad26.RSV.preF demonstrated protection from RSV infection through immunization in a human challenge model, and therefore could potentially protect against natural RSV infection and disease.NCT03334695; CR108398, 2017-003194-33 (EudraCT); VAC18193RSV2002.
