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NCT05425732 Clinical Trial

Safety and Immunogenicity of V116 in Pneumococcal Vaccine-naïve Adults (V116-003, STRIDE-3)

Pneumococcal Infection Clinical Trial

Official title:
A Phase 3, Randomized, Double-blind, Active Comparator-controlled Clinical Study to Evaluate the Safety, Tolerability, and Immunogenicity of V116 in Pneumococcal Vaccine-naïve Adults

Clinical Trial Details — Status: Completed

Administrative data
NCT number NCT05425732
Other study ID # V116-003
Secondary ID V116-0032022-000
Status Completed
Phase Phase 3
First received
Last updated
Start date July 13, 2022
Est. completion date May 18, 2023

Study information
Verified date May 2024
Source Merck Sharp & Dohme LLC
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

This is a phase 3, randomized, double-blind, active comparator-controlled study of the safety, tolerability, and immunogenicity of V116 compared to PCV20 (pneumococcal 20-valent conjugate vaccine ([Prevnar 20™ / APEXXNAR™]) in pneumococcal vaccine-naïve adults. It is hypothesized that V116 is noninferior to PCV20 for the common serotypes and superior to PCV20 for the unique serotypes as assessed by serotype specific opsonophagocytic activity (OPA) 30 days postvaccination. It is also hypothesized that V116 in participants 18 to 49 years of age immunobridges to V116 in participants 50 to 64 years of age as assessed by serotype specific OPA geometric mean titers (GMTs) 30 days postvaccination for all 21 serotypes in V116. Participants ≥50 years of age will be enrolled in Cohort 1, and participants 18 to 49 years of age will be enrolled in Cohort 2.

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Study Design

Related Conditions & MeSH terms

Intervention

Biological:
• V116
0.5 mL injection solution in prefilled syringe containing 4 µg of each PnPs antigen (3, 6A, 7F, 8, 9N, 10A, 11A, 12F, 15A, 15C, 16F, 17F, 19A, 20A, 22F, 23A, 23B, 24F, 31, 33F, and 35B) given by intramuscular (IM) injection.
• PCV20
0.5 mL injection suspension in prefilled syringe containing 2.2 µg of each PnPs antigen (1, 3, 4, 5, 6A, 7F, 8, 9V, 10A, 11A, 12F, 14, 15B, 18C, 19A, 19F, 22F, 23F, 33F) and 4.4 µg of PnPs antigen 6B.
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Sponsors (1)
Lead Sponsor Collaborator
Merck Sharp & Dohme LLC

Countries where clinical trial is conducted

United States,  Australia,  Belgium,  Chile,  Germany,  Korea, Republic of,  New Zealand,  Puerto Rico,  Sweden,  Taiwan,  Turkey, 

Outcome
Type Measure Description Time frame Safety issue
Primary Percentage of Participants With Solicited Injection-site Adverse Events (AEs) An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. Solicited injection-site AEs consist of the following: pain/tenderness, redness/erythema, and swelling. Up to 5 days post-vaccination
Primary Percentage of Participants With Solicited Systemic AEs An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. Solicited systemic AEs consist of the following: fatigue (tiredness), headache, myalgia (muscle aches), and pyrexia (maximum temperature = 100.4 °F/38.0 °C) Up to 5 days post-vaccination
Primary Percentage of Participants With Vaccine-related Serious AE (SAE) A vaccine-related SAE is any untoward medical consequence that results in death, is life-threatening, requires inpatient hospitalization or prolongs existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, or is an other important medical event, which is determined by the investigator to be related to the vaccine. Up to 194 days post-vaccination
Primary Serotype Specific Opsonophagocytic (OPA) Geometric Mean Titers (GMTs) in Cohort 1 Only, for the Pneumococcal Serotypes Contained in V116 and PCV20 The serotype specific OPA GMTs for the pneumococcal serotypes in cohort 1 of V116 and PCV20 only were determined using the multiplex opsonophagocytic assay (MOPA). GMT values were estimated from a constrained longitudinal data analysis; (cLDA) model. Per protocol, within group, confidence intervals (CIs) or any other measures of dispersion were not planned or determined. The 10 common pneumococcal serotypes in both V116 and PCV20 were as follows: 3, 6A, 7F, 8, 10A, 11A, 12F, 19A, 22F, and 33F. The 11 unique pneumococcal serotypes in V116 were as follows: 9N, 15A, 15C, 16F, 17F, 20A, 23A, 23B, 24F, 31, and 35B. Per protocol, Cohort 2 were not analyzed in this outcome measure. Day 30 post-vaccination
Primary Percentage of Participants With =4-fold Change From Baseline in Serotype Specific OPA Responses in Cohort 1 Only for the 11 Unique Pneumococcal Serotypes Contained in V116 The percentage of participants with =4-fold rise from baseline in serotype specific OPAs for the 11 unique pneumococcal serotypes contained in V116. Per protocol, within group CIs or any other measures of dispersion were not planned or determined. The 11 unique pneumococcal serotypes in V116 were as follows: 9N, 15A, 15C, 16F, 17F, 20A, 23A, 23B, 24F, 31, and 35B. Per protocol, Cohort 2 were not analyzed in this outcome measure. Baseline and Day 30 post-vaccination
Primary Serotype Specific OPA GMTs in Participants 18-49 Years and Participants 50-64 Years for the Pneumococcal Serotypes Contained in V116 The serotype specific OPA GMTs for the pneumococcal serotypes in participants 18-49 years and participants 50-64 years treated with V116 only were determined using the MOPA. GMT values were estimated from a cLDA model. Per protocol, within group CIs or any other measures of dispersion were not planned or determined. The 10 common pneumococcal serotypes in both V116 and PCV20 were as follows: 3, 6A, 7F, 8, 10A, 11A, 12F, 19A, 22F, and 33F. The 11 unique pneumococcal serotypes in V116 were as follows: 9N, 15A, 15C, 16F, 17F, 20A, 23A, 23B, 24F, 31, and 35B. Per protocol, participants treated with PCV20 were not analyzed in this outcome measure. Day 30 post-vaccination
Secondary Percentage of Participants From Cohort 1 V116 With =4-fold Change in OPA Responses for Cross Reactive Pneumococcal Serotypes The percentage of participants with =4-fold rise from baseline was determined for Cohort 1 V116 serotypes 6C and 15B, two serotypes which cross react with PCV20. Point estimate and 95% CI are based on the Clopper-Pearson method. A conclusion of acceptability is based on the lower bound of the 95% CI of the percentages of participants with a =4-fold rise from baseline being > 50 percentage points (one-sided p-value < 0.025). Per protocol, participants treated with PCV20, and V116 Cohort 2 were not analyzed in this outcome measure. Baseline and Day 30 post-vaccination
Secondary Serotype Specific OPA GMTs for Cross Reactive Pneumococcal Serotypes in Adults 50 to 64 Years of Age From Cohort 1 and Adults 18 to 49 Years of Age From Cohort 2 The serotype specific OPA GMTs for the pneumococcal serotypes in participants 18-49 years and participants 50-64 years treated with V116 only were determined using the MOPA for serotypes 6C and 15B which cross react with PCV20. GMT values were estimated from a LDA model. Per protocol, within group CIs or any other measures of dispersion were not planned or determined. Per protocol, participants treated with PCV20 were not analyzed in this outcome measure. Day 30 post-vaccination
Secondary Serotype Specific Immunoglobulin (IgG) Geometric Mean Concentrations (GMCs) in Cohort 1 Only, for the Pneumococcal Serotypes Contained in V116 and PCV20 The serotype specific IgG GMCs for the pneumococcal serotypes in cohort 1 of V116 and PCV20 only were determined using pneumococcal electrochemiluminescence (PnECL). GMC values were estimated from a cLDA model. Per protocol, within group CIs or any other measures of dispersion were not planned or determined. The 10 common pneumococcal serotypes in both V116 and PCV20 were as follows: 3, 6A, 7F, 8, 10A, 11A, 12F, 19A, 22F, and 33F. The 11 unique pneumococcal serotypes in V116 were as follows: 9N, 15A, 15C, 16F, 17F, 20A, 23A, 23B, 24F, 31, and 35B. Per protocol, Cohort 2 were not analyzed in this outcome measure. Day 30 post-vaccination
Secondary Geometric Mean Fold Change From Baseline in OPA GMTs in Cohort 1 for the Pneumococcal Serotypes Contained in V116 and PCV20 The geometric mean fold rise (GMFR) from baseline in serotype specific OPA GMTs for cohort 1 was determined using MOPA. The within-group 95% CIs were obtained by exponentiating the CIs of the mean of the natural log values based on the t-distribution. The 10 common pneumococcal serotypes in both V116 and PCV20 were as follows: 3, 6A, 7F, 8, 10A, 11A, 12F, 19A, 22F, and 33F. The 11 unique pneumococcal serotypes in V116 were as follows: 9N, 15A, 15C, 16F, 17F, 20A, 23A, 23B, 24F, 31, and 35B. Per protocol, Cohort 2 were not analyzed in this outcome measure. Baseline and Day 30 post-vaccination
Secondary Geometric Mean Fold Change From Baseline in IgG Antibody GMCs in Cohort 1 for the Pneumococcal Serotypes Contained in V116 and PCV20 The GMFR from baseline in serotype specific IgG antibody GMCs for cohort 1 was determined using PnECL. The within-group 95% CIs were obtained by exponentiating the CIs of the mean of the natural log values based on the t-distribution. The 10 common pneumococcal serotypes in both V116 and PCV20 were as follows: 3, 6A, 7F, 8, 10A, 11A, 12F, 19A, 22F, and 33F. The 11 unique pneumococcal serotypes in V116 were as follows: 9N, 15A, 15C, 16F, 17F, 20A, 23A, 23B, 24F, 31, and 35B. Per protocol, Cohort 2 were not analyzed in this outcome measure. Baseline and Day 30 post-vaccination
Secondary Percentage of Participants With =4-fold Change From Baseline in IgG Antibody GMCs in Cohort 1 for the Pneumococcal Serotypes Contained in V116 and PCV20 Percentage of participants with =4-fold rise from baseline in serotype specific IgG antibody GMCs for cohort 1 was determined using PnECL. The within-group 95% CIs were based on the exact binomial method proposed by Clopper and Pearson. The 10 common pneumococcal serotypes in both V116 and PCV20 were as follows: 3, 6A, 7F, 8, 10A, 11A, 12F, 19A, 22F, and 33F. The 11 unique pneumococcal serotypes in V116 were as follows: 9N, 15A, 15C, 16F, 17F, 20A, 23A, 23B, 24F, 31, and 35B. Per protocol, Cohort 2 were not analyzed in this outcome measure. Baseline and Day 30 post-vaccination
Secondary Percentage of Participants With =4-fold Change From Baseline in OPA GMTs in Cohort 1 for the Pneumococcal Serotypes Contained in V116 and PCV20 Percentage of participants with =4-fold rise from baseline in OPA GMTs in Cohort 1 was determined using MOPA. The within-group 95% CIs were based on the exact binomial method proposed by Clopper and Pearson. The 10 common pneumococcal serotypes in both V116 and PCV20 were as follows: 3, 6A, 7F, 8, 10A, 11A, 12F, 19A, 22F, and 33F. The 11 unique pneumococcal serotypes in V116 were as follows: 9N, 15A, 15C, 16F, 17F, 20A, 23A, 23B, 24F, 31, and 35B. Per protocol, Cohort 2 were not analyzed in this outcome measure. Baseline and Day 30 post-vaccination
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