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Clinical and Vaccine Immunology, April 2007, p. 426-434, Vol. 14, No. 4
1071-412X/07/$08.00+0     doi:10.1128/CVI.00377-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Immunogenicity, Reactogenicity, and Immune Memory after Primary Vaccination with a Novel Haemophilus influenzae-Neisseria meningitidis Serogroup C Conjugate Vaccine{triangledown}

Heinz-J. Schmitt,1 Gudrun Maechler,2,{dagger} Pirmin Habermehl,1 Markus Knuf,1 Roland Saenger,3,{ddagger} Norman Begg,2 and Dominique Boutriau2*

Johannes-Gutenberg-Universität, Langenbeckstr. 1, 55101 Mainz,1 GlaxoSmithKline, Munich, Germany,3 GlaxoSmithKline Biologicals, Rixensart, Belgium2

Received 10 October 2006/ Returned for modification 16 November 2006/ Accepted 29 January 2007

We evaluated two formulations of a new combined Haemophilus influenzae type b (Hib)-meningococcal serogroup C (MenC)-tetanus toxoid (TT) conjugated vaccine and two formulations of a new MenC-TT vaccine (trials 711202/001 and 711202/008; clinical trial register numbers NCT00135486 and NCT00135564 [www.ClinicalTrials.gov]). A total of 520 healthy infants were randomized to receive primary vaccination (at 2, 3, and 4 months) with either MenC-TT plus diphtheria-tetanus-acellular pertussis (DTPa)-hepatitis B virus (HBV)-inactivated poliovirus (IPV)/Hib, Hib-MenC-TT plus DTPa-HBV-IPV, or MenC-CRM197 plus DTPa-HBV-IPV/Hib (control). At 12 to 15 months, subjects received a polysaccharide challenge with meningococcal polysaccharide C plus a DTPa-HBV-IPV/Hib booster. Immune responses were assessed 1 month after dose 2, 1 month after dose 3, and prior to and 1 month after the booster. After primary vaccination, there was no difference between groups in seroprotection rates as measured by titers of serum bactericidal antibody (SBA) to MenC (≥1:8) or concentrations of anti-polyribosyl ribitol phosphate (PRP) antibody (≥0.15 µg/ml). Prior to the booster, there was no difference between groups in SBA seroprotection rates, whereas anti-PRP seroprotection rates were significantly higher after priming with Hib-MenC-TT. Booster doses induced large increases in SBA and anti-PRP antibodies in primed groups, indicating successful priming with induction of immune memory. Reactogenicity and safety were similar in all groups during the primary and booster phases. A novel combined Hib-MenC-TT conjugate vaccine induced MenC and Hib responses comparable to those induced by licensed monovalent vaccines. A Hib-MenC-TT conjugate vaccine provides vaccination against two major pathogens in a single injection and is a suitable candidate for use in primary or booster vaccination schedules.


* Corresponding author. Mailing address: GlaxoSmithKline Biologicals, Rue du l'Institut, 89, 1330 Rixensart, Belgium. Phone: 32-2-656-9120. Fax: 32-2-656-8044. E-mail: Dominique.Boutriau{at}gskbio.com

{triangledown} Published ahead of print on 7 February 2007.

{dagger} Present address: GlaxoSmithKline, Munich, Germany.

{ddagger} Present address: GlaxoSmithKline Biologicals, Rixensart, Belgium.


Clinical and Vaccine Immunology, April 2007, p. 426-434, Vol. 14, No. 4
1071-412X/07/$08.00+0     doi:10.1128/CVI.00377-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.




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