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Evaluating Vaccine Responses in Healthy Infants Receiving Their Routine Primary Immunisation According to the Accelerated United Kingdom Schedule at 2, 3 and 4 Months (P13UK)

20. marts 2019 opdateret af: Prof. Elizabeth Miller

A Prospective Study to Evaluate the Immune Response of UK Infants Receiving the 13-valent Pneumococcal Conjugate Vaccine as Part of Their Routine Primary Immunisation Schedule at 2 and 4 Months

Streptococcus pneumoniae is a major cause of serious bacterial infections, particularly among young children. Over 30 different types of the pneumococcus germ can cause invasive disease, but 7 types (namely serotypes 4, 6B, 9V, 14, 18C, 19F and 23F) are responsible for around 75% of cases in young children. A pneumococcal conjugate vaccine against these 7 serotypes (PCV7; Prevenar ®, Wyeth Vaccines) was introduced into the UK national immunisation programme in September 2006 and has resulted in a rapid reduction in pneumococcal disease caused by the 7 serotypes among both vaccinated children and older unvaccinated children and adults through herd immunity. By 2009, over half of all invasive pneumococcal cases in young children were caused by six other pneumococcal serotypes (1, 3, 5, 6A, 7F and 19A) that are included in a newly licensed 13 valent pneumococcal vaccine (PCV13; Prevenar 13®, Wyeth Vaccines). In April 2010, PCV13 replaced PCV7 in the UK immunisation programme with the aim of further reducing cases of invasive pneumococcal disease. The antibody responses induced by the 7 serotypes in both PCV13 and PCV7 have been shown to be comparable, but the protection offered by the additional 6 serotypes in PCV13 merits further study. Also, it is possible that the use of PCV13 instead of PCV7 may interfere with immune responses to other vaccines, such as Haemophilus influenzae serotype b (Hib), which are given to infants at the same time as PCV13. The proposed study will aim to collect one blood sample from infants after they receive their routine vaccinations at 2, 3 and 4 months in order to their measure immune responses to routine vaccines. The investigators hope that their results will help us better understand the added protection offered by the 13valent pneumococcal vaccine and ensure that children are adequately protected by the other vaccines they receive.

Studieoversigt

Status

Afsluttet

Betingelser

Detaljeret beskrivelse

This study will aim to prospectively recruit infants in the first 6 months of life who are either due to receive or in the process of receiving their routine infant immunisation and request one blood sample one month after completing their primary immunisation schedule, which will be at around 5 months of age, if they fulfil the inclusion criteria for the study.

NUMBER OF SUBJECTS AND DURATION OF STUDY

A total of 200 infants will be recruited in two centres - Hertfordshire and Gloucestershire.

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

93

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

Ikke ældre end 6 måneder (Barn)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Healthy infants who have received their primary immunisation schedule at appropriate intervals

Beskrivelse

Inclusion Criteria:

Male or female infants born at term (at least 37 weeks gestation) aged <6 months:

  1. With written informed consent obtained from the parent or legal guardian of the infant to participate in the study and to allow the infant's General Practitioner (GP) to be informed of participation in the study and be contacted, if required, for confirmation of the vaccination history

  2. Who have received all their primary immunisations in the 1st 6 months of life, including:

    • 3 doses of Pediacel®
    • 2 doses of Prevenar13®, with the 1st dose given at 6-12 weeks of age and the 2nd dose at 8-12 weeks after the 1st dose
    • 2 doses of any MenC vaccine
  3. Do not fulfil any of the Exclusion Criteria

Exclusion Criteria:

Participant may not be included in the study if any of the following apply:

  1. History of invasive Haemophilus influenzae serotype b (Hib), pneumococcal or meningococcal disease
  2. Confirmed or suspected immunosuppressive or immunodeficient condition (including HIV)
  3. Bleeding disorders and/or prolonged bleeding time
  4. Major congenital defects or chronic disease
  5. Premature birth (<37 weeks gestation at birth)

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
1. To determine the proportion of infants with pneumococcal serotype-specific IgG antibody concentrations ≥0.35 μg/ml for the 13 serotypes included in Prevenar13 at one month after completion of primary immunisation
Tidsramme: 24 months
24 months

Sekundære resultatmål

Resultatmål
Tidsramme
1. To determine the geometric mean concentrations (GMCs) of pneumococcal serotype-specific IgG antibody concentrations for each of the 13 serotypes in Prevenar13 one month after primary immunisation
Tidsramme: 24 months
24 months
2. To determine, using a functional opsonophagocytic assay (OPA), the proportion of infants with geometric mean titres (GMT) ≥1:8 for the 13 serotypes in Prevenar13 one month after primary immunisation
Tidsramme: 24 months
24 months
3. To determine serum bactericidal assay (SBA) titres with 95%CI for MenC and the proportion of infants achieving SBA titres ≥8 or ≥128 one month after primary immunisation
Tidsramme: 24 months
24 months
4. To determine Hib GMC with 95%CI and proportions of infants with Hib antibody concentrations ≥0.15 μg/ml or ≥1.0 μg/ml one month after primary immunisation
Tidsramme: 24 months
24 months

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Prof. Elizabeth Miller

Efterforskere

  • Studiestol: Elizabeth Coates, PhD, Public Health England

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Hjælpsomme links

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. november 2010

Primær færdiggørelse (Faktiske)

1. maj 2012

Studieafslutning (Faktiske)

1. juni 2013

Datoer for studieregistrering

Først indsendt

26. august 2011

Først indsendt, der opfyldte QC-kriterier

29. august 2011

Først opslået (Skøn)

30. august 2011

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

22. marts 2019

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

20. marts 2019

Sidst verificeret

1. august 2018

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • P13UK

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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Placeringer

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