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A Study to Assess the Safety, Tolerability, and Immunogenicity of 3 Lots of a Multivalent Pneumococcal Conjugate Vaccine Administered to Adults

26. august 2026 opdateret af: Pfizer

A PHASE 3, RANDOMIZED, DOUBLE-BLIND TRIAL TO EVALUATE THE SAFETY, TOLERABILITY, AND IMMUNOGENICITY OF 3 LOTS OF A MULTIVALENT PNEUMOCOCCAL CONJUGATE VACCINE IN ADULTS

The purpose of this study is to provide safety data and demonstrate lot consistency with the PG4 vaccine by evaluating the immunogenicity of 3 different lots of this vaccine.

This study will compare a new pneumococcal vaccine with the vaccine currently in use to see if they are similarly safe. It will also compare three batches of the new vaccine to make sure they work the same way. Blood samples will be taken to measure how the body responds to the vaccines.

The study will be conducted in the United States. Participants will be assigned to 1 of 4 groups. Group 1: PG4 vaccine lot 1; Group 2: PG4 vaccine lot 2; Group 3: PG4 vaccine lot 3; Group 4: 20vPnC.

Within each group, participants will be assigned by chance in a 2:2:2:1 ratio to receive 1 vaccine injection (shot) with either PG4 (new vaccine) lot 1, PG4 lot 2, PG4 Lot 3 or 20vPnC, given in the arm. This means that for every 7 participants, about 2 will receive either PG4 lot 1, lot 2 or lot 3 and about 1 will receive 20vPnC.

Each participant will take part in the study for approximately 6 months.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

4670

Fase

  • Fase 3

Kontakter og lokationer

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

Studiekontakt

Studiesteder

    • California
      • Lake Forest, California, Forenede Stater, 92630
        • Orange County Research Center
      • Walnut Creek, California, Forenede Stater, 94598
        • Diablo Clinical Research, LLC dba Flourish Research
    • Connecticut
      • Milford, Connecticut, Forenede Stater, 06460
        • Clinical Research Consulting
    • Florida
      • Doral, Florida, Forenede Stater, 33172
        • Suncoast Research Associates
      • Miami, Florida, Forenede Stater, 33176
        • Entrust Clinical Research
      • Miami Lakes, Florida, Forenede Stater, 33014
        • Palm Springs Community Health Center
      • Miami Lakes, Florida, Forenede Stater, 33016
        • Indago Research and Health Center, Inc.
      • West Palm Beach, Florida, Forenede Stater, 33409
        • Palm Beach Research Center
    • Georgia
      • Fayetteville, Georgia, Forenede Stater, 30214
        • Javara inc.
      • Stockbridge, Georgia, Forenede Stater, 30281
        • Clinical Research Atlanta
    • Hawaii
      • Honolulu, Hawaii, Forenede Stater, 96814
        • East-West Medical Research Institute
    • Illinois
      • Melrose Park, Illinois, Forenede Stater, 60160
        • DM Clinical Research
    • Iowa
      • Sioux City, Iowa, Forenede Stater, 51106
        • Velocity Clinical Research, Sioux City
    • Michigan
      • Grosse Pointe Woods, Michigan, Forenede Stater, 48236
        • Henry Ford St. John Hospital - Thomas Mackey Center for Infectious Disease Research
    • Missouri
      • Chesterfield, Missouri, Forenede Stater, 63005
        • Clinical Research Professionals
    • Nebraska
      • Grand Island, Nebraska, Forenede Stater, 68803
        • Velocity Clinical Research, Grand Island
    • North Carolina
      • Wilmington, North Carolina, Forenede Stater, 28401
        • Accellacare - Wilmington
    • Ohio
      • Cincinnati, Ohio, Forenede Stater, 45212
        • CTI Clinical Research Center
    • South Carolina
      • Moncks Corner, South Carolina, Forenede Stater, 29461
        • Clinical Trials of South Carolina
      • Myrtle Beach, South Carolina, Forenede Stater, 29572
        • TMA Headlands LLC (d/b/a Trial Management Associates)
    • Texas
      • Mesquite, Texas, Forenede Stater, 75149
        • SMS Clinical Research LLC
      • Sugar Land, Texas, Forenede Stater, 77478
        • DM Clinical Research - Sugar Land
      • Tomball, Texas, Forenede Stater, 77375
        • DM Clinical Research
    • Utah
      • Salt Lake City, Utah, Forenede Stater, 84109
        • J. Lewis Research, Inc. / Foothill Family Clinic
      • Salt Lake City, Utah, Forenede Stater, 84121
        • J. Lewis Research, Inc. / Foothill Family Clinic South

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

  • Voksen

Tager imod sunde frivillige

Ja

Beskrivelse

Inclusion Criteria:

Adults 18 through 49 years of age, who have no history of receiving a pneumococcal vaccine after 5 years of age.

Exclusion Criteria:

Individuals with a history of severe allergic reactions to a vaccine or its components, serious chronic medical disorders, significant psychiatric conditions, known or suspected immunodeficiency, substance abuse issues, asplenia, bleeding diathesis or prolonged bleeding, a history of a prior confirmed invasive pneumococcal infection, and pregnant or breastfeeding females will be excluded from enrollment in the trial.

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: Tredobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: PG4 Vaccine Lot 1
Multivalent Pneumococcal Vaccine
Multivalent Pneumococcal Vaccine
Andre navne:
  • PG4 Lot 3
Eksperimentel: PG4 Vaccine Lot 2
Multivalent Pneumococcal Vaccine
Multivalent Pneumococcal Vaccine
Andre navne:
  • PG4 Lot 3
Eksperimentel: PG4 Vaccine Lot 3
Multivalent Pneumococcal Vaccine
Multivalent Pneumococcal Vaccine
Andre navne:
  • PG4 Lot 3
Aktiv komparator: 20 Valent Pneumococcal Conjugate Vaccine (20vPnC)
20 Valent Pneumococcal Conjugate Vaccine
20 Valent Pneumococcal Conjugate Vaccine
Andre navne:
  • Prevnar 20

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Percentage of Participants with Prespecified Local Reactions Within 7 Days After Vaccination
Tidsramme: Within 7 days after Vaccination
Prompted local reactions after each dose
Within 7 days after Vaccination
Percentage of Participants reporting Prespecified Systemic Events Within 7 Days after Vaccination
Tidsramme: Within 7 days after Vaccination
Prompted systemic events after each dose
Within 7 days after Vaccination
Percentage of Participants with Adverse Events (AEs)
Tidsramme: From Vaccination to 1 month after Vaccination
AEs occurring from Dose 1 to 1 month after the vaccination
From Vaccination to 1 month after Vaccination
Percentage of Participants with Serious Adverse Events (SAEs)
Tidsramme: From Vaccination to 6 months after Vaccination
SAEs occurring from Dose 1 to 6 months after the vaccination
From Vaccination to 6 months after Vaccination
OPA geometric mean ratios (GMR) between each pair of PG4 vaccine lots
Tidsramme: 1 month after Vaccination
OPA GMRs between each pair of PG4 vaccine lots at 1 month after vaccination
1 month after Vaccination

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
OPA Serotype-specific geometric mean titers (GMT) for PG4 vaccine serotypes
Tidsramme: 1 month after Vaccination
OPA GMTs at 1 month after vaccination
1 month after Vaccination
OPA geometric mean fold rise (GMFR) for PG4 vaccine serotypes
Tidsramme: From before vaccination to 1 month after vaccination
GMFRs in OPA titers from before to 1 month after vaccination
From before vaccination to 1 month after vaccination
Percentages of participants with a ≥4-fold rise in opsonophagocytic activity (OPA) titers
Tidsramme: From Vaccination to 6 months after Vaccination
Percentages of participants with a ≥4-fold rise in OPA titers from before to 1 month after vaccination
From Vaccination to 6 months after Vaccination
Percentages of participants with OPA titers ≥ lower limit of quantitation (LLOQ)
Tidsramme: From before vaccination to 1 month after vaccination
Percentages of participants with OPA titers ≥ lower limit of quantitation (LLOQ) from before vaccination to 1 month after vaccination
From before vaccination to 1 month after vaccination

Samarbejdspartnere og efterforskere

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

Sponsor

Efterforskere

  • Studieleder: Pfizer CT.gov Call Center, Pfizer

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 (Anslået)

8. september 2026

Primær færdiggørelse (Anslået)

7. juni 2027

Studieafslutning (Anslået)

7. juni 2027

Datoer for studieregistrering

Først indsendt

26. august 2026

Først indsendt, der opfyldte QC-kriterier

26. august 2026

Først opslået (Faktiske)

31. august 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

31. august 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

26. august 2026

Sidst verificeret

1. august 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • C4931012

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

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 .