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En dosisrespons fase 2 klinisk undersøgelse af VLA1553 hos raske børn i alderen 1 til 11 år

21. juli 2026 opdateret af: Valneva Austria GmbH

Et randomiseret, observatør-blindet, dosisrespons fase 2-studie for at vurdere sikkerheden og immunogeniciteten af ​​to forskellige dosisniveauer af en levende svækket Chikungunya-virusvaccinekandidat (VLA1553) hos raske børn i alderen 1 til 11 år

Dette er en multicenter, prospektiv, randomiseret, observatør-blindet, tre-arm, fase 2 klinisk undersøgelse, der evaluerer fuld dosis formulering af VLA1553, halv dosis formulering af VLA1553 og kontrol.

Mindst 300 raske mandlige og kvindelige børn i alderen 1 til 11 år vil blive tilmeldt, og den samlede fordeling af deltagere vil være 2:2:1 til de to VLA1553-dosisgrupper (n=120 hver) eller kontrol (n=60).

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Dette er et multicenter, prospektivt, randomiseret, observatørblindet, tre-arms, fase 2 klinisk studie, der evaluerer fulddosisformuleringen af ​​VLA1553, halvdosisformuleringen af ​​VLA1553 og kontrol (Nimenrix, en tetravalent meningokokvaccine - Men ACWY).

Mindst 300 mandlige og kvindelige raske børn i alderen 1 til 11 år vil blive tilmeldt, og den samlede fordeling af deltagere vil være 2:2:1 til de to VLA1553 dosisgrupper (n=120 hver) eller kontrol (Nimenrix) (n=60 ).

Som en sikkerhedsforanstaltning vil de første 30 sentinel-deltagere blive tilmeldt undersøgelsen på en åben-label måde i henhold til en alderstrinsordning.

Efter sentinelanalyse vil deltagerne blive indskrevet på en blindet, randomiseret måde i tre undersøgelsesarme. Inden for hver behandlingsarm vil deltagerne blive stratificeret i tre alderslag:

Stratum A: 7 til 11 år -børn fra deres 7 års fødselsdag til dagen før deres 12 års fødselsdag.

Stratum B: 3 til 6 år - børn fra deres 3 års fødselsdag til dagen før deres 7 års fødselsdag.

Stratum C: 1 til 2 år - børn fra deres 1 års fødselsdag til dagen før deres 3 års fødselsdag.

Aldersstrata for VLA1553-behandlingsarmene er målrettet til at være lige store, dvs. ca. 40 pr. aldersstratum.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

304

Fase

  • Fase 2

Kontakter og lokationer

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

Studiekontakt

  • Navn: Valneva Clinical Development
  • Telefonnummer: +4 1 206 20
  • E-mail: office@valneva.com

Studiesteder

      • Santo Domingo, Dominikanske republik, 10306
        • Instituto Dermatologico y Cirugia de la Piel "Dr Huberto Bogaert Diaz" IDCP
    • Gazcue
      • Santo Domingo, Gazcue, Dominikanske republik
        • Fundacion Dominicana de Perinatologia Fundacion Probebe
      • Tegucigalpa, Honduras
        • Inversiones en Investigacion Medica INVERIME

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

  • Barn

Tager imod sunde frivillige

Ja

Beskrivelse

Inklusionskriterier:

  1. Sunde mandlige eller kvindelige børn i alderen 7 til 11 år12 for Stratum A, 3 til 6 år13 for Stratum B og 1 til 2 år14 for Stratum C på vaccinationstidspunktet;
  2. Skriftligt informeret samtykke fra deltagerens forælder(e)/Juridisk acceptable repræsentant(er) ((LAR(s)), i henhold til lokale krav, og skriftlig informeret samtykke fra deltageren, hvis det er relevant;

Ekskluderingskriterier:

  1. Deltager, der er IgM+/IgG-, kvalificerer sig ikke til deltagelse i denne undersøgelse.
  2. Deltageren tager medicin eller anden behandling for uløste symptomer, der tilskrives en tidligere CHIKV-infektion; eller har deltaget i et klinisk studie, der involverer en CHIKV-undersøgelsesvaccine;
  3. Deltageren har en akut eller nylig infektion (og som ikke er symptomfri i ugen før screeningsbesøget (besøg 0)

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Firedobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: VLA1553 fuld dosis
Enkelt intramuskulær vaccination på dag 1 med fuld dosis VLA1553, en frysetørret levende svækket Chikungunya-vaccinekandidat
Eksperimentel: VLA1553 halv dosis
Enkelt intramuskulær vaccination på dag 1 med VLA1553 halv dosis, en lyofiliseret levende svækket Chikungunya vaccinekandidat
Aktiv komparator: Styring
Enkelt intramuskulær vaccination på dag 1 med Nimenrix (Men ACWY-vaccine), en konjugatvaccine indiceret til den aktive immunisering
Nimenrix

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Number of Participants With Solicited Injection Site Reactions
Tidsramme: within 14 days post-vaccination
Frequency and severity of solicited injection site and solicited systemic reactions within 14 days post-vaccination.
within 14 days post-vaccination
Severity of Solicited Injection Site Reactions
Tidsramme: within 14 days post-vaccination
within 14 days post-vaccination
Number of Participants With Solicited Systemic Reactions
Tidsramme: within 14 days post-vaccination
within 14 days post-vaccination
Severity of Solicited Systemic Reactions
Tidsramme: within 14 days post-vaccination
within 14 days post-vaccination

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Number of Participants With Any Adverse Event (AE)
Tidsramme: within 28 days post-vaccination
within 28 days post-vaccination
Severity of Any Adverse Event (AE)
Tidsramme: within 28 days post-vaccination
In the Outcome measure "Severity of any AE", subjects may be represented in more than one AE category. Therefore, the total number of subjects with any AE may be lower than the sum of the numbers of subjects in the individual AE categories (solicited / unsolicited AE).
within 28 days post-vaccination
Number of Participants With of Unsolicited AE
Tidsramme: until Month 6 (Day 180) and Month 12 (Day 365) post-vaccination
until Month 6 (Day 180) and Month 12 (Day 365) post-vaccination
Severity of Unsolicited AE
Tidsramme: until Month 6 (Day 180) and Month 12 (Day 365) post-vaccination
until Month 6 (Day 180) and Month 12 (Day 365) post-vaccination
Number of Participants With Any Serious Adverse Event (SAE)
Tidsramme: until Month 6 (Day 180) and Month 12 (Day 365) post-vaccination
until Month 6 (Day 180) and Month 12 (Day 365) post-vaccination
Number of Participants With Any Early Onset Adverse Event of Special Interest (AESI)
Tidsramme: 2 to 21 days post-vaccination

Early onset AESI were defined as:

  1. Fever (≥ 38.0 °c / 100.4 °f,) AND
  2. symptoms suggesting acute (poly)arthralgia/arthritis, myalgia, neurological symptoms (e.g., for meningoencephalitis, acute encephalitis, headache, seizures), back pain, lymphadenopathy, cardiac or ocular symptoms (e.g., for uveitis and retinitis); OR one or more of the following signs and symptoms: macular to maculopapular rash (sometimes with cutaneous pruritus [foot plant]), pigmentary changes, bullous rash/ skin blistering, purpura, ecchymosis and
  3. Onset of symptoms 2 to 21 days after vaccination AND
  4. Duration of event ≥ 3 days.
2 to 21 days post-vaccination
Severity of Any Early Onset Adverse Event of Special Interest (AESI)
Tidsramme: 2 to 21 days post-vaccination
2 to 21 days post-vaccination
Number of Participants With Any Late Onset Adverse Event of Special Interest (AESI)
Tidsramme: Starting 22 days post-vaccination until end of trial, 12 months post-vaccination
Starting 22 days post-vaccination until end of trial, 12 months post-vaccination
Severity of Any Late Onset Adverse Event of Special Interest (AESI)
Tidsramme: Starting 22 days post-vaccination until end of trial, 12 months post-vaccination
Starting 22 days post-vaccination until end of trial, 12 months post-vaccination
Assessment of Viremia on Days 1, 4, 8 and 15
Tidsramme: on Days 1, 4, 8 and 15 and beyond as applicable

Number of participants with viremic results, including quantifiable results and results below LLOQ, by visit and by pooled trial arm. Day 29 was only tested, if Day 15 was tested positive.

Viremia is measured in genome copy equivalents per milliliter (GCE/mL). All quantifiable results and results below LLOQ (< 3214.4 GCE/mL), but above the LOD, are considered "viremic". A result of "not detected" or below LOD (<1071,4 GCE/mL) is included as "non-viremic".

on Days 1, 4, 8 and 15 and beyond as applicable
Immune Response in Baseline Seronegative Participants as Measured by CHIKV-specific Neutralizing Antibody Titers
Tidsramme: on Day 1, Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Immune Response provided by Geometric Mean Titers (GMTs) in Baseline Seronegative Participants pooled by Trial Arm up to 12 months post vaccination.
on Day 1, Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Immune Response as Measured by CHIKV-specific Neutralizing Antibody Titers by Age Group and Trial Arm.
Tidsramme: on Day 1, Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Immune Response provided by Geometric Mean Titers (GMTs) by Visit, by Age Group and Trial Arm up to 12 months post vaccination.
on Day 1, Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Immune Response Measured by CHIKV-specific Neutralizing Antibody Titers Pooled by Dose
Tidsramme: on Day 1, Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Immune Response provided by Geometric Mean Titers (GMTs) by Visit, pooled by Trial Arm up to 12 months post vaccination.
on Day 1, Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Percentage of Participants Seronegative at Baseline With Seroconversion as Compared to Baseline
Tidsramme: at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of participants seronegative at baseline with Seroconversion (defined as >4-fold titer change compared to baseline) by Visit Pooled by Trial Arm
at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of Participants Seropositive at Baseline With Seroconversion as Compared to Baseline
Tidsramme: at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of participants seropositive at baseline with Seroconversion (defined as >4-fold titer change compared to baseline) by Visit Pooled by Trial Arm.
at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of Participants With Seroconversion as Compared to Baseline Stratified by Age Stratum
Tidsramme: at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of participants with Seroconversion (defined as >4-fold titer change compared to baseline) by Visit by Age Group and Trial Arm.
at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of Participants With Seroconversion as Compared to Baseline by Dose
Tidsramme: at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of participants with Seroconversion (defined as >4-fold titer change compared to baseline) by Visit Pooled by Trial Arm
at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of Participants Seronegative at Baseline With a Seroresponse (Defined as PRNT50 ≥150 for Baseline Negative Participants) by Dose
Tidsramme: on Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Percentage of Participants with Seroresponse for CHIKV-Specific Neutralizing Antibody Titers (defined as PRNT50 ≥150) by Visit Pooled by Trial Arm.
on Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Percentage of Participants With a Seroresponse Stratified by Age Stratum
Tidsramme: on Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Percentage of Participants with Seroresponse for CHIKV-Specific Neutralizing Antibody Titers (defined as PRNT50 ≥150) by Visit by Age Group and Trial Arm.
on Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Percentage of Participants With a Seroresponse Stratified by Dose
Tidsramme: on Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Percentage of Participants with Seroresponse for CHIKV-Specific Neutralizing Antibody Titers (defined as PRNT50 ≥150) by Visit Pooled by Trial Arm.
on Day 15, Day 29, Day 85, Day 180 and Month 12 post-vaccination
Fold Change of CHIKV-specific Neutralizing Antibody Titers as Compared to Baseline in Participants Seronegative at Baseline
Tidsramme: at Days 15, 29, 85, 180 and at Month 12 post-vaccination
Fold Change for CHIKV-Specific Neutralizing Antibody Titers in seronegative Participants by Visit Pooled by Trial Arm.
at Days 15, 29, 85, 180 and at Month 12 post-vaccination
Fold Change of CHIKV-specific Neutralizing Antibody Titers as Compared to Baseline in Seropositive Participants
Tidsramme: at Days 15, 29, 85, 180 and at Month 12 post-vaccination
Fold Change for CHIKV-Specific Neutralizing Antibody Titers in seropositive Participants by Visit Pooled by Trial Arm.
at Days 15, 29, 85, 180 and at Month 12 post-vaccination
Fold Change of CHIKV-specific Neutralizing Antibody Titers as Compared to Baseline Stratified by Age Stratum
Tidsramme: at Days 15, 29, 85, 180 and at Month 12 post-vaccination
Fold Change for CHIKV-Specific Neutralizing Antibody Titers by Visit by Age Group and Trial Arm.
at Days 15, 29, 85, 180 and at Month 12 post-vaccination
Fold Change of CHIKV-specific Neutralizing Antibody Titers as Compared to Baseline Stratified by Dose
Tidsramme: at Days 15, 29, 85, 180 and at Month 12 post-vaccination
Fold Change for CHIKV-Specific Neutralizing Antibody Titers by Visit Pooled by Trial Arm.
at Days 15, 29, 85, 180 and at Month 12 post-vaccination
Percentage of Participants Seronegative at Baseline Reaching an at Least 4-fold, 8-fold, 16-fold or 64-fold Change in CHIKV-specific Neutralizing Antibody Titers Compared to Baseline
Tidsramme: at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of Participants Reaching a 4-/8-/16-/64-Fold Change in Titers by Visit Pooled by Trial Arm.
at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of Participants Reaching an at Least 4-fold, 8-fold, 16-fold or 64-fold Change in CHIKV-specific Neutralizing Antibody Titers Compared to Baseline Stratified by Age Stratum
Tidsramme: at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of Participants Reaching a 4-/8-/16-/64-Fold Change in Titers by Visit by Age Group and Trial Arm.
at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of Participants Reaching an at Least 4-fold, 8-fold, 16-fold or 64-fold Change in CHIKV-specific Neutralizing Antibody Titers Compared to Baseline by Dose
Tidsramme: at Day 15, Day 29, Day 85, Day 180 and Month 12
Percentage of Participants Reaching a 4-/8-/16-/64-Fold Change in Titers by Visit Pooled by Trial Arm.
at Day 15, Day 29, Day 85, Day 180 and Month 12

Samarbejdspartnere og efterforskere

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

Sponsor

Efterforskere

  • Studiestol: Valneva Clinical Development, Valneva Austria GmbH

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.

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 (Faktiske)

18. december 2023

Primær færdiggørelse (Faktiske)

31. juli 2024

Studieafslutning (Faktiske)

2. juli 2025

Datoer for studieregistrering

Først indsendt

24. oktober 2023

Først indsendt, der opfyldte QC-kriterier

24. oktober 2023

Først opslået (Faktiske)

30. oktober 2023

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

13. august 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

21. juli 2026

Sidst verificeret

1. august 2025

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • VLA1553-221

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

Efter afslutningen af forsøget kan Valneva give adgang til individuelle de-identificerede deltagerdata og relaterede forsøgsdokumenter (f.eks. Protokol, statistisk analyseplan (SAP), klinisk forsøgsrapport (CTR)) efter anmodning fra kvalificerede forskere og underlagt Valnevas gennemgang og godkendelse.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

produkt fremstillet i og eksporteret fra U.S.A.

Ingen

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 .