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Mencevax ACWY

Phase 3

Infections, Meningococcal | Monoclonal antibody | Other |GSK plc|Last Updated: Nov 26, 2018

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials2
Total Enrollment1,783
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT01154088Immunogenicity and Safety of Meningococcal Vaccine GSK 134612 Versus Mencevax™ ACWY in Healthy 18-25 Year OldsPHASE3 COMPLETED 1,170Aug 27, 2010Dec 30, 2010Nov 26, 20183 Panama, Philippines +1
NCT00427908Study in Children to Evaluate Non-Inferiority and Persistence up to 5 Years of GSK Bio Meningococcal Vaccine 134612PHASE2 COMPLETED 613Feb 7, 2007Dec 3, 2007Jun 4, 201811 Finland
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Study Endpoints
Primary Endpoints
Number of Subjects With Vaccine Response for Serum Bactericidal Assay Using Rabbit Complement Against Neisseria Meningitides Serogroups A, C, W-135, Y (rSBA-MenA, rSBA-MenC, rSBA-MenW-135 and rSBA-MenY) Antibodies
At Month 1

Vaccine response defined as: for initially seronegative subjects, antibody titer greater than or equal to (≥) 1:32 and for initially seropositive subjects: antibody titer ≥ 4 fold the pre-vaccination antibody titer. The analysis was performed with the GSK rSBA assay.

rSBA-MenA, rSBA-MenC, rSBA-MenW-135 and rSBA-MenY Titers
At Month 1

Titers are presented as geometric mean titers (GMTs). All subjects underwent testing with the GSK rSBA assay for all 4 serogroups.

Number of Subjects With Serum Bactericidal Assay Using Rabbit Complement Against Neisseria Meningitides Serogroups A, C, W-135, Y (rSBA-MenA, rSBA-MenC, rSBA-MenW-135 and rSBA-MenY) Antibodies Vaccine Response
One Month after vaccination

Vaccine response was defined as: * for initially seronegative subjects, post vaccination rSBA titer ≥ 1:32 * for initially seropositive subjects, at least 4-fold increase in rSBA titer from pre to post vaccination.

Number of Subjects With rSBA Antibody Titers Greater Than or Equal to the Cut-off Value
Prior to (PRE) vaccination

The cut-off value for the rSBA titers was greater than or equal to (≥) 1:8. This analysis was performed by the GSK Biologicals' laboratory.

Percentage of Subjects With rSBA Antibody Titers Greater Than or Equal to the Cut-off Value
Prior to (PRE) to vaccination

The cut-off value for the rSBA titers was greater than or equal to (≥) 1:8. This analysis was performed by the GSK Biologicals' laboratory.

Secondary Endpoints
Number of Subjects With rSBA-MenA, rSBA-MenC, rSBA-MenW-135 and rSBA-MenY Antibody Titers ≥ the Cut-off Value
At Day 0 and at Month 1
rSBA-MenA, rSBA-MenC, rSBA-MenW-135 and rSBA-MenY Antibody Titers
At Day 0 and at Month 1
Number of Subjects With rSBA-MenA, rSBA-MenC, rSBA-MenW-135 and rSBA-MenY Antibody Titers Above the Cut-off Value
At Day 0 and at Month 1
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Study Design & Arms
AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposePREVENTION
Treatment Arms
ArmTypeDescription
Group AEXPERIMENTAL -
Group BEXPERIMENTAL -
Group CACTIVE_COMPARATOR -
Interventions
NameTypeDescription
Mencevax ACWYBIOLOGICALOne dose, Subcutaneous injection
GSK Biologicals' meningococcal serogroup A, C, W-135, Y tetanus toxoid conjugate investigational vaccine [GSK 134612]BIOLOGICALOne dose, Intramuscular injection
GSK Biolgicals' meningococcal vaccine 134612 (Nimenrix)BIOLOGICALOne intramuscular dose.
Mencevax™ ACWYBIOLOGICALOne subcutaneous dose.
Meningitec™BIOLOGICALOne intramuscular dose.
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Eligibility Criteria
Age Range18 Years — 25 Years
SexALL
Healthy VolunteersYes
Study Sites3

Inclusion Criteria: All subjects must satisfy all of the following criteria at study entry: * Subjects whom the investigator believes they can and will comply with the requirements of the protocol will be enrolled in the study. * A male or female between, and including, 18 and 25 years of age the ...

Countries:PanamaPhilippinesThailandFinland
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