13-valent pneumococcal conjugate vaccine (PCV13) is immunogenic and safe in children 6-17 years of age with sickle cell disease previously vaccinated with 23-valent pneumococcal polysaccharide vaccine (PPSV23): Results of a phase 3 study

Mariane De Montalembert, Miguel R. Abboud, Anne Fiquet, Adlette Inati, Jeffrey D. Lebensburger, Normeen Kaddah, Galila Mokhtar, Antonio Piga, Natasha Halasa, Baba Inusa, David C. Rees, Paul T. Heath, Paul Telfer, Catherine Driscoll, Sami Al Hajjar, Alberto Tozzi, Qin Jiang, Emilio A. Emini, William C. Gruber, Alejandra GurtmanDaniel A. Scott

Research output: Contribution to journalArticle

17 Scopus citations


Background: A large population of older children with sickle cell disease (SCD) is currently vaccinated with only 23-valent pneumococcal polysaccharide vaccine (PPSV23). In immunocompetent adults, PPSV23 vaccination reduces immune responses to subsequent vaccination with a pneumococcal vaccine. The 13-valent pneumococcal conjugate vaccine (PCV13), which addresses this limitation, may offer an advantage to this population at high risk of pneumococcal disease. Procedure: Children with SCD 6-17 years of age previously vaccinated with PPSV23 at least 6 months before study enrollment received two doses of PCV13 6 months apart. Anti-pneumococcal polysaccharide immunoglobulin G (IgG) geometric mean concentrations (GMCs) and opsonophagocytic activity (OPA) geometric mean titers (GMTs) were measured before, 1 month after each administration, and 1 year after the second administration. Results: Following each PCV13 administration, IgG GMCs and OPA GMTs significantly increased, and antibody levels after doses 1 and 2 were generally comparable. Antibody levels declined over the year following dose 2. At 1 year after the second administration, OPA GMTs for all and IgG GMCs for most serotypes remained above pre-vaccination levels. Most adverse events were due to vaso-occlusive crises, a characteristic of the underlying condition of SCD. Conclusions: Children with SCD who were previously vaccinated with PPSV23 responded well to 1 PCV13 dose, and a second dose did not increase antibody response. PCV13 antibodies persisted above pre-vaccination levels for all serotypes 1 year after dose 2. Children with SCD may benefit from at least one dose of PCV13.

Original languageEnglish (US)
Pages (from-to)1427-1436
Number of pages10
JournalPediatric Blood and Cancer
Issue number8
Publication statusPublished - Aug 1 2015



  • 13-valent pneumococcal conjugate vaccine
  • 23-valent pneumococcal polysaccharide vaccine
  • Hydroxycarbamide
  • Immunogenicity
  • Safety
  • Sickle cell disease

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Hematology
  • Oncology

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