NCT06446752

Brief Summary

This proposed 2-arm randomized evaluation of two doses of 4CMenB vaccine versus placebo at Enrollment and Month 2 is designed as a proof-of-concept study to inform potential use for dual meningococcal B and gonococcal prevention, and to inform Neisseria gonorrheae vaccine development.

Trial Health

75
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
1,100

participants targeted

Target at P75+ for phase_3

Timeline
8mo left

Started Aug 2024

Geographic Reach
1 country

5 active sites

Status
active not recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress73%
Aug 2024Jan 2027

First Submitted

Initial submission to the registry

May 11, 2024

Completed
26 days until next milestone

First Posted

Study publicly available on registry

June 6, 2024

Completed
2 months until next milestone

Study Start

First participant enrolled

August 14, 2024

Completed
2.1 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

October 1, 2026

Expected
3 months until next milestone

Study Completion

Last participant's last visit for all outcomes

January 1, 2027

Last Updated

July 10, 2025

Status Verified

March 1, 2025

Enrollment Period

2.1 years

First QC Date

May 11, 2024

Last Update Submit

July 7, 2025

Conditions

Keywords

sexually transmitted infectionsSTIGonorrhea

Outcome Measures

Primary Outcomes (1)

  • First diagnosis of gonorrhea at cervical or anorectal sites occurring greater than or equal to 1 month after the second vaccination with study product through to the study end

    Assess efficacy of Bexsero in prevention of cervical and/or anorectal gonococcal infection

    18 months

Secondary Outcomes (4)

  • First diagnosis of gonorrhea at cervical or anorectal sites occurring >1 month after the second vaccination with study product through to study end, by specified subgroups

    18 months

  • First diagnosis of pharyngeal gonorrhea occurring > 1 month after the second vaccination with study product through to study end, by study arm

    18 months

  • Cumlative GC incidence in the first 9 months after receipt of the second dose of vaccine compared to cumlative GC incidence in the 10-16 months after receipt of the second dose

    18 months

  • To ascertain the safety of Bexsero

    18 months

Study Arms (2)

Bexsero

EXPERIMENTAL

Meningococcal Serogroup B vaccine rMenB+OMV NZ (Bexsero) administered as an IM injection by 0.5-mL single-dose syringe at enrollment (Visit 1) and 2 months post-enrollment (Visit 3).

Biological: Bexsero

Placebo

PLACEBO COMPARATOR

Normal saline (placebo) administered as an IM injection by 0.5-mL single-dose syringe at enrollment (Visit 1) and 2 months post-enrollment (Visit 3).

Biological: Placebo

Interventions

BexseroBIOLOGICAL

Administered as an IM injection by 0.5-mL single-dose syringe at enrollment (Visit 1) and 2 months post-enrollment (Visit 3).

Also known as: 4MenB-4C
Bexsero
PlaceboBIOLOGICAL

Administered as an IM injection by 0.5-mL single-dose syringe at enrollment (Visit 1) and 2 months post-enrollment (Visit 3).

Also known as: Saline
Placebo

Eligibility Criteria

Age18 Years - 45 Years
Sexfemale
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • Individuals born female aged 18-45 years of age inclusive on the day of screening
  • In good health as determined by past medical history, medication use, and targeted physical examination,
  • If not living with HIV, negative HIV test conducted at screening
  • If living with HIV, on an antiretroviral regimen for ≥3 months, with an undetectable HIV RNA of \<200 copies/ml and/or a CD4 count \>300 cells/cmm within 12 months of screening
  • If of reproductive potential,
  • Willing to not become pregnant during vaccination period and
  • Have a negative pregnancy test prior to each vaccination and
  • Willing to use a reliable method of contraception until month 3 (i.e., after the second vaccination visit)
  • Not breastfeeding
  • Sexually active in the past 3 months, defined as vaginal or anal sex
  • At risk for gonorrhea based on sexual behaviour characteristics including
  • Previous PrEP use in the past 12 months, or
  • Past history of STIs in the past 12 months, or
  • or more partners in the past 12 months
  • Has provided signed informed consent, and is willing and likely to comply with the trial procedures and follow-up visit requirements
  • +1 more criteria

You may not qualify if:

  • Contra-indications to Bexsero
  • Previous receipt of a Meningococcal Group B vaccine
  • Receipt of antibiotics active against N. gonorrhoeae in the 14 days prior to the Enrollment Visit, including oral or parenteral antibiotics\*
  • Participants with NG and/or CT detected at screening may re-screen after receiving appropriate antibiotic treatment
  • Planned long-term (\> 4 weeks) antibiotic use for prophylaxis or treatment for acne or other bacterial condition(s)
  • Use or planned use of a live vaccine within +/- 30 days, an inactive vaccine within +/- 14 days, or an influenza vaccine within +/- 7 days from receipt of study product. Authorized or approved, inactivated COVID-19 vaccines may be given more than 7 days +/- receipt of study product for all study participants
  • Use of any investigational drug or vaccine within 30 days prior to enrollment, or planned/anticipated use during study participation
  • Currently receiving immunosuppressive agent or systemic corticosteroids (dose \>5 mg/day of prednisone) for \>14 consecutive days within 90 days prior to enrollment. Topical or inhaled steroids are allowed. Topical steroids cannot be applied to study product injection site
  • Has received antineoplastic (chemotherapy) or radiotherapy within 90 days prior to enrollment
  • Has received immunoglobulins and/or any blood products within 180 days prior to enrollment
  • Progressive, unstable, or uncontrolled disease including but not limited to cardiac, hepatic, renal, immunological, neurological or psychiatric conditions
  • Has a condition which in the opinion of the investigator is not suitable for intramuscular vaccination, blood draws, or participation in the trial
  • Pregnant or breastfeeding at enrollment

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (5)

Desmond Tutu Health Foundation - Emavundleni Research Centre

Cape Town, South Africa

Location

Desmond Tutu Health Foundation - Masiphumulele Site

Cape Town, South Africa

Location

Khayelitsha Vuka Research Clinic

Cape Town, South Africa

Location

Wits RHI Ward 21 Clinical Research Site

Johannesburg, South Africa

Location

Center for Community Based Research (CCBR)

Pietermaritzburg, South Africa

Location

Related Publications (19)

  • Celum C, Hosek S, Tsholwana M, Kassim S, Mukaka S, Dye BJ, Pathak S, Mgodi N, Bekker LG, Donnell DJ, Wilson E, Yuha K, Anderson PL, Agyei Y, Noble H, Rose SM, Baeten JM, Fogel JM, Adeyeye A, Wiesner L, Rooney J, Delany-Moretlwe S. PrEP uptake, persistence, adherence, and effect of retrospective drug level feedback on PrEP adherence among young women in southern Africa: Results from HPTN 082, a randomized controlled trial. PLoS Med. 2021 Jun 18;18(6):e1003670. doi: 10.1371/journal.pmed.1003670. eCollection 2021 Jun.

    PMID: 34143779BACKGROUND
  • Celum CL, Bukusi EA, Bekker LG, Delany-Moretlwe S, Kidoguchi L, Omollo V, Rousseau E, Travill D, Morton JF, Mogaka F, O'Malley G, Barnabee G, van der Straten A, Donnell D, Parikh UM, Kudrick L, Anderson PL, Haberer JE, Wu L, Heffron R, Johnson R, Morrison S, Baeten JM; POWER Study Team. PrEP use and HIV seroconversion rates in adolescent girls and young women from Kenya and South Africa: the POWER demonstration project. J Int AIDS Soc. 2022 Jul;25(7):e25962. doi: 10.1002/jia2.25962.

    PMID: 35822945BACKGROUND
  • Celum CL, Gill K, Morton JF, Stein G, Myers L, Thomas KK, McConnell M, van der Straten A, Baeten JM, Duyver M, Mendel E, Naidoo K, Dallimore J, Wiesner L, Bekker LG. Incentives conditioned on tenofovir levels to support PrEP adherence among young South African women: a randomized trial. J Int AIDS Soc. 2020 Nov;23(11):e25636. doi: 10.1002/jia2.25636.

    PMID: 33247553BACKGROUND
  • Kennedy CE, Haberlen SA, Narasimhan M. Integration of sexually transmitted infection (STI) services into HIV care and treatment services for women living with HIV: a systematic review. BMJ Open. 2017 Jun 21;7(6):e015310. doi: 10.1136/bmjopen-2016-015310.

    PMID: 28637733BACKGROUND
  • Kakaire O, Byamugisha JK, Tumwesigye NM, Gamzell-Danielsson K. Prevalence and factors associated with sexually transmitted infections among HIV positive women opting for intrauterine contraception. PLoS One. 2015 Apr 10;10(4):e0122400. doi: 10.1371/journal.pone.0122400. eCollection 2015.

    PMID: 25859659BACKGROUND
  • Paavonen J, Eggert-Kruse W. Chlamydia trachomatis: impact on human reproduction. Hum Reprod Update. 1999 Sep-Oct;5(5):433-47. doi: 10.1093/humupd/5.5.433.

    PMID: 10582782BACKGROUND
  • Ville Y, Leruez M, Glowaczower E, Robertson JN, Ward ME. The role of Chlamydia trachomatis and Neisseria gonorrhoeae in the aetiology of ectopic pregnancy in Gabon. Br J Obstet Gynaecol. 1991 Dec;98(12):1260-6. doi: 10.1111/j.1471-0528.1991.tb15399.x.

    PMID: 1777459BACKGROUND
  • Stephens AJ, Aubuchon M, Schust DJ. Antichlamydial antibodies, human fertility, and pregnancy wastage. Infect Dis Obstet Gynecol. 2011;2011:525182. doi: 10.1155/2011/525182. Epub 2011 Sep 22.

    PMID: 21949601BACKGROUND
  • Amornkul PN, Vandenhoudt H, Nasokho P, Odhiambo F, Mwaengo D, Hightower A, Buve A, Misore A, Vulule J, Vitek C, Glynn J, Greenberg A, Slutsker L, De Cock KM. HIV prevalence and associated risk factors among individuals aged 13-34 years in Rural Western Kenya. PLoS One. 2009 Jul 31;4(7):e6470. doi: 10.1371/journal.pone.0006470.

    PMID: 19649242BACKGROUND
  • Masese L, Baeten JM, Richardson BA, Bukusi E, John-Stewart G, Graham SM, Shafi J, Kiarie J, Overbaugh J, McClelland RS. Changes in the contribution of genital tract infections to HIV acquisition among Kenyan high-risk women from 1993 to 2012. AIDS. 2015 Jun 1;29(9):1077-85. doi: 10.1097/QAD.0000000000000646.

    PMID: 26125141BACKGROUND
  • Steen R, Wi TE, Kamali A, Ndowa F. Control of sexually transmitted infections and prevention of HIV transmission: mending a fractured paradigm. Bull World Health Organ. 2009 Nov;87(11):858-65. doi: 10.2471/blt.08.059212.

    PMID: 20072772BACKGROUND
  • Naidoo S, Wand H, Abbai NS, Ramjee G. High prevalence and incidence of sexually transmitted infections among women living in Kwazulu-Natal, South Africa. AIDS Res Ther. 2014 Sep 15;11:31. doi: 10.1186/1742-6405-11-31. eCollection 2014.

    PMID: 25243015BACKGROUND
  • Ong JJ, Fu H, Baggaley RC, Wi TE, Tucker JD, Smith MK, Rafael S, Falconer J, Terris-Prestholt F, Mameletzis I, Mayaud P. Missed opportunities for sexually transmitted infections testing for HIV pre-exposure prophylaxis users: a systematic review. J Int AIDS Soc. 2021 Feb;24(2):e25673. doi: 10.1002/jia2.25673.

    PMID: 33605081BACKGROUND
  • Ong JJ, Baggaley RC, Wi TE, Tucker JD, Fu H, Smith MK, Rafael S, Anglade V, Falconer J, Ofori-Asenso R, Terris-Prestholt F, Hodges-Mameletzis I, Mayaud P. Global Epidemiologic Characteristics of Sexually Transmitted Infections Among Individuals Using Preexposure Prophylaxis for the Prevention of HIV Infection: A Systematic Review and Meta-analysis. JAMA Netw Open. 2019 Dec 2;2(12):e1917134. doi: 10.1001/jamanetworkopen.2019.17134.

    PMID: 31825501BACKGROUND
  • Tacconelli E, Carrara E, Savoldi A, Harbarth S, Mendelson M, Monnet DL, Pulcini C, Kahlmeter G, Kluytmans J, Carmeli Y, Ouellette M, Outterson K, Patel J, Cavaleri M, Cox EM, Houchens CR, Grayson ML, Hansen P, Singh N, Theuretzbacher U, Magrini N; WHO Pathogens Priority List Working Group. Discovery, research, and development of new antibiotics: the WHO priority list of antibiotic-resistant bacteria and tuberculosis. Lancet Infect Dis. 2018 Mar;18(3):318-327. doi: 10.1016/S1473-3099(17)30753-3. Epub 2017 Dec 21.

    PMID: 29276051BACKGROUND
  • Stewart J, Bukusi E, Sesay FA, Oware K, Donnell D, Soge OO, Celum C, Odoyo J, Kwena ZA, Scoville CW, Violette LR, Morrison S, Simoni J, McClelland RS, Barnabas R, Gandhi M, Baeten JM. Doxycycline post-exposure prophylaxis for prevention of sexually transmitted infections among Kenyan women using HIV pre-exposure prophylaxis: study protocol for an open-label randomized trial. Trials. 2022 Jun 16;23(1):495. doi: 10.1186/s13063-022-06458-8.

    PMID: 35710444BACKGROUND
  • Petousis-Harris H, Radcliff FJ. Exploitation of Neisseria meningitidis Group B OMV Vaccines Against N. gonorrhoeae to Inform the Development and Deployment of Effective Gonorrhea Vaccines. Front Immunol. 2019 Apr 9;10:683. doi: 10.3389/fimmu.2019.00683. eCollection 2019.

    PMID: 31024540BACKGROUND
  • Semchenko EA, Tan A, Borrow R, Seib KL. The Serogroup B Meningococcal Vaccine Bexsero Elicits Antibodies to Neisseria gonorrhoeae. Clin Infect Dis. 2019 Sep 13;69(7):1101-1111. doi: 10.1093/cid/ciy1061.

    PMID: 30551148BACKGROUND
  • Hadad R, Jacobsson S, Pizza M, Rappuoli R, Fredlund H, Olcen P, Unemo M. Novel meningococcal 4CMenB vaccine antigens - prevalence and polymorphisms of the encoding genes in Neisseria gonorrhoeae. APMIS. 2012 Sep;120(9):750-60. doi: 10.1111/j.1600-0463.2012.02903.x. Epub 2012 Apr 28.

    PMID: 22882265BACKGROUND

Related Links

MeSH Terms

Conditions

GonorrheaSexually Transmitted Diseases

Interventions

4CMenB vaccineSodium Chloride

Condition Hierarchy (Ancestors)

Neisseriaceae InfectionsGram-Negative Bacterial InfectionsBacterial InfectionsBacterial Infections and MycosesInfectionsSexually Transmitted Diseases, BacterialCommunicable DiseasesGenital DiseasesUrogenital DiseasesDisease AttributesPathologic ProcessesPathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

ChloridesHydrochloric AcidChlorine CompoundsInorganic ChemicalsSodium Compounds

Study Officials

  • Connie Celum, MD, MPH

    University of Washington

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
phase 3
Allocation
RANDOMIZED
Masking
TRIPLE
Who Masked
PARTICIPANT, CARE PROVIDER, INVESTIGATOR
Masking Details
Double-blind, Placebo-controlled
Purpose
PREVENTION
Intervention Model
PARALLEL
Model Details: 1:1 randomization to Bexsero vaccine or placebo injection, to be administered as two intramuscular (IM) doses, two months apart (at Enrollment/Visit 1 and Month 2/Visit 3). Assessment for safety events at one month following the IM doses (Visit 2 and Visit 4), followed by 5 in-clinic follow-up visits for safety, clinical, and laboratory assessments.
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Professor, Department of Global Health

Study Record Dates

First Submitted

May 11, 2024

First Posted

June 6, 2024

Study Start

August 14, 2024

Primary Completion (Estimated)

October 1, 2026

Study Completion (Estimated)

January 1, 2027

Last Updated

July 10, 2025

Record last verified: 2025-03

Locations