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GBS-NN/NN2

Phase 1

Group B Streptococcal Infections | Monoclonal antibody | Infectious Disease |IQVIA Holdings, Inc.|Last Updated: Sep 5, 2025

Success Probability

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials1
Total Enrollment90

FDA Designations

No designations recorded

Clinical trial landscape

GBS-NN/NN2 · 1 trial · 1 indication

Phase 1 1
NCT05782179Study to Evaluate the Safety, Tolerability and Immunogenicity of Three Doses of GBS Vaccine in Elderly ParticipantsGroup B Streptococcal Infections
COMPLETED90 Analytics
PHASE1COMPLETED
Study to Evaluate the Safety, Tolerability and Immunogenicity of Three Doses of GBS Vaccine in Elderly Participants
Group B Streptococcal InfectionsUnlock trial analytics

Study Endpoints

Primary Endpoints

Safety and Tolerability of the GBS-NN/NN2 Vaccine for 4 Weeks After Each Dose of Vaccine
Up to 28 days after each vaccination

* Safety and tolerability as determined by the occurrence of Adverse Events (AEs) consisting of local and systemic reactogenicity within 7 days after vaccination * Unsolicited AEs, including adverse events of special interest (AESIs), Medically attended adverse events (MAAEs) and Serious adverse events (SAEs) within 28 days after each vaccination * AESIs, MAAEs, ARs/SARs leading to withdrawal from the study.

Secondary Endpoints

Geometric Mean Antibody Concentration in μg/mL for Antibodies to the Four Individual Alps
Day 197
Geometric Mean Fold Increase in Antibody Concentration for Antibodies to the Four Individual Alps
4 weeks after each vaccination (Days 29, 57 and 197)
Seroconversion Rate at Any Time Post Vaccination
Up to 6 months after last vaccination
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Cohort 1 - ActiveEXPERIMENTALCohort 1 (30 healthy older adult) will receive three injections, each consisting of 50 μg of GBS-NN and 50 μg of GBS NN2 bound to aluminium hydroxide in a 4:1 ratio (investigational medicinal product or placebo).
Cohort 1 - PlaceboPLACEBO_COMPARATORCohort 1 (30 healthy older adult) will receive three injections, each consisting of 50 μg of GBS-NN and 50 μg of GBS NN2 bound to aluminium hydroxide in a 4:1 ratio (investigational medicinal product or placebo).
Cohort 2 - ActiveEXPERIMENTALCohort 2 (30 healthy older adult) will receive three injections, each consisting of 125 μg of GBS-NN and 125 μg of GBS NN2 bound to aluminium hydroxide in a 4:1 ratio (investigational medicinal product or placebo).
Cohort 2 - PlaceboPLACEBO_COMPARATORCohort 2 (30 healthy older adult) will receive three injections, each consisting of 125 μg of GBS-NN and 125 μg of GBS NN2 bound to aluminium hydroxide in a 4:1 ratio (investigational medicinal product or placebo).
Cohort 3 - ActiveEXPERIMENTALCohort 3 (15 obese and/or diabetic older adults) will receive three injections, each consisting of 50 μg of GBS-NN and 50 μg of GBS NN2 bound to aluminium hydroxide in a 4:1 ratio (investigational medicinal product or placebo).
Cohort 3 - PlaceboPLACEBO_COMPARATORCohort 3 (15 obese and/or diabetic older adults) will receive three injections, each consisting of 50 μg of GBS-NN and 50 μg of GBS NN2 bound to aluminium hydroxide in a 4:1 ratio (investigational medicinal product or placebo).
Cohort 4 - ActiveEXPERIMENTALCohort 4 (15 obese and/or diabetic older adults) will receive three injections, each consisting of 125 μg of GBS-NN and 125 μg of GBS NN2 bound to aluminium hydroxide in a 4:1 ratio (investigational medicinal product or placebo).
Cohort 4 - PlaceboPLACEBO_COMPARATORCohort 4 (15 obese and/or diabetic older adults) will receive three injections, each consisting of 125 μg of GBS-NN and 125 μg of GBS NN2 bound to aluminium hydroxide in a 4:1 ratio (investigational medicinal product or placebo).

Interventions

NameTypeDescription
GBS-NN/NN2BIOLOGICALGBS-NN/NN2 bound to alhydrogel as an adjuvant
PlaceboBIOLOGICALNormal Saline 0.9 %
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Eligibility Criteria

Age Range55 Years to 75 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: 1. Participants aged 55 to 75 years. 2. Body mass index (BMI) ≥18 and ≤30 kg/m2 for healthy participants, ≥ 30 to ≤45 kg/m2 for obese participants and ≥18 to ≤45 kg/m2 for type 2 diabetic participants. 3. Able to voluntarily provide written informed consent to participate in the...

Countries:Belgium
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Frequently asked questions about GBS-NN/NN2

What is GBS-NN/NN2 used for?

GBS-NN/NN2 is an investigational monoclonal antibody being developed for Group B Streptococcal Infections. It is being studied in elderly participants aged 55 years and older. The drug is currently in Phase 1 clinical development and is not yet approved by regulatory authorities.

Who makes GBS-NN/NN2?

GBS-NN/NN2 is being developed by IQVIA Holdings, Inc., a company traded on the New York Stock Exchange under the ticker symbol IQV. The company is conducting clinical research on this investigational monoclonal antibody for Group B Streptococcal Infections.

What phase is GBS-NN/NN2 in?

GBS-NN/NN2 is in Phase 1 clinical development. It is an investigational drug and has not been approved by regulatory authorities. One Phase 1 clinical trial has been completed, and the drug remains in early-stage clinical development.

What clinical trials is GBS-NN/NN2 in?

GBS-NN/NN2 has one completed clinical trial registered as NCT05782179. This Phase 1 study evaluated the safety, tolerability, and immunogenicity of three doses of the vaccine in elderly participants. The trial enrolled 90 healthy volunteers in Belgium and was randomized, double-blind, and placebo-controlled.

How does GBS-NN/NN2 work?

GBS-NN/NN2 is a monoclonal antibody designed to target Group B Streptococcus bacteria. As an antibody, it is intended to bind to the bacteria and help the immune system neutralize the infection. The drug is being studied for its ability to prevent or treat Group B Streptococcal Infections.