title: Safety, immunogenicity, and antibody persistence following an investigational Streptococcus pneumoniae and Haemophilus influenzae triple-protein vaccine in a phase 1 randomized controlled study in healthy adults.
abstract: We investigated a protein-based nontypeable Haemophilus influenzae (NTHi) and pneumococcal (HiP) vaccine containing pneumococcal histidine triad D (PhtD), detoxified pneumolysin (dPly), and NTHi protein D (PD) in adults. In a phase I study, 40 healthy 18- to 40-year-old subjects were randomized (2:2:1) to receive two HiP doses administered 60 days apart, with or without AS03 adjuvant (HiP-AS and HiP groups, respectively), or Engerix B (GlaxoSmithKline, Belgium) as a control. Safety, antibodies, and antigen-specific CD4(+) T-cell immune responses were assessed before and until 480 days after vaccination. No serious adverse events were reported, and no subject withdrew due to an adverse event. Local and systemic symptoms were reported more frequently in the HiP-AS group than in the other two groups. The frequency and intensity of local and systemic symptoms appeared to increase after the second dose of HiP-AS or HiP but not Engerix B. Antibody geometric mean concentrations (GMCs) for PhtD, dPly, and PD increased after each dose of HiP-AS or HiP, with higher GMCs being observed in the HiP-AS group (statistically significant for anti-PD after dose 1 and anti-Ply after dose 2). GMCs remained higher at day 420 than prior to vaccination in both the HiP-AS and HiP groups. Antigen-specific CD4(+) T cells increased after each dose but were unmeasurable by day 480. Two doses of an investigational PhtD-dPly-PD protein vaccine induced humoral immunity and antigen-specific CD4(+) T-cell responses after each dose, with generally higher responses when the vaccine was administered with AS03. HiP combined with AS03 appeared to be more reactogenic than the antigens alone. (This study has been registered at ClinicalTrials.gov under registration no. NCT00814489.).
authors.affiliation: Blekinge Institute of Technology, School of Health Science, Karlskrona, Sweden.
authors.forename: Johan
authors.initials: J
authors.lastname: Berglund
authors.forename: Peter
authors.initials: P
authors.lastname: Vink
authors.forename: Fernanda
authors.initials: F
authors.lastname: Tavares Da Silva
authors.forename: Pascal
authors.initials: P
authors.lastname: Lestrate
authors.forename: Dominique
authors.initials: D
authors.lastname: Boutriau
mesh_terms: D000276:Adjuvants, Immunologic / Q000008:administration & dosage; D000293:Adolescent; D000328:Adult; D000907:Antibodies, Bacterial / Q000097:blood*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D004338:Drug Combinations; D064420:Drug-Related Side Effects and Adverse Reactions / Q000453:epidemiology / Q000473:pathology; D005260:Female; D018073:Haemophilus Vaccines / Q000008:administration & dosage / Q000009:adverse effects* / Q000276:immunology*; D006801:Humans; D008297:Male; D022242:Pneumococcal Vaccines / Q000008:administration & dosage / Q000009:adverse effects* / Q000276:immunology*; D011136:Polysorbates / Q000008:administration & dosage; D013185:Squalene / Q000008:administration & dosage; D014611:Vaccination / Q000009:adverse effects / Q000379:methods; D017778:Vaccines, Combined / Q000008:administration & dosage / Q000009:adverse effects / Q000276:immunology; D022223:Vaccines, Subunit / Q000008:administration & dosage / Q000009:adverse effects / Q000276:immunology; D014614:Vaccines, Synthetic / Q000008:administration & dosage / Q000009:adverse effects / Q000276:immunology; D055815:Young Adult; D024502:alpha-Tocopherol / Q000008:administration & dosage
chemical_list: D000276:Adjuvants, Immunologic; D000907:Antibodies, Bacterial; D004338:Drug Combinations; D018073:Haemophilus Vaccines; D022242:Pneumococcal Vaccines; D011136:Polysorbates; D017778:Vaccines, Combined; D022223:Vaccines, Subunit; D014614:Vaccines, Synthetic; D013185:Squalene; C550253:AS03 adjuvant; D024502:alpha-Tocopherol