AzTrials
AzTrials

Neisseria GonorrheaPhase 1LTBNG601NCT07758972

Safety and Immunogenicity Study of a Multivalent Gonorrhoea Vaccine

A Phase 1 study testing LTB-NG6 and Sodium Chloride 0.9% in people with Neisseria Gonorrhea, run by LimmaTech Biologics AG at 1 site in Germany.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

The main goal of this trial is to evaluate the safety and immunogenicity of the candidate N. gonorrhoeae vaccine, LTB-NG6. Read more about this study

Who is it for?
Ages 18 to 50 yearsHealthy volunteers can take part
Conditions the study is for
Neisseria Gonorrhea
What is being tested?
LTB-NG6 and Sodium Chloride 0.9%
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
142 participants
Where
1 siteGermany
Study dates
19 Aug 2026to 23 Sep 2027
Phase
Phase 1
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 50 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • Aged 18-50 years (inclusive) at the time of the first injection
  • Good and stable general health, determined by medical history, laboratory findings and physical examination as judged by the Investigator before receiving the first injection.
  • Willingness and ability to comply with the requirements of the protocol (e.g., completion of the diary forms, return for follow-up visits)
  • Signed written informed consent obtained
  • Availability for the trial duration, including all planned follow-up visits and phone calls
  • Negative urine pregnancy test for WOCBP. WOCBP must be willing to use a highly effective method of contraception during the trial

Who cannot join

  • Health conditions that, in the opinion of the Investigator, may interfere with optimal participation in the trial or place the participant at increased risk of adverse events
  • Acute or active infectious disease (including symptomatic sexually transmitted infections or any other ongoing acute infections), fever (oral temperature ≥38.0°C), or acute illness at the time of enrollment.
  • History of gonorrhea at any time (either self-reported or medically confirmed) or confirmed at screening by a positive nucleic acid amplification test (NAAT) result for Neisseria gonorrhoeae
  • History of prior confirmed N. meningitidis infection
  • Previous vaccination with Bexsero or any meningococcal serogroup B vaccine (including self-report)
  • Any deviation from the normal range in biochemistry or hematology blood tests clinically significant in the opinion of the Investigator, measured at the screening visit
Show all 21Show fewer
  • Clinical conditions representing contraindication to intramuscular vaccination and blood draws (e.g., coagulation disorder)
  • Known or suspected impairment of immunological function (e.g., documented HIV infection, asplenia/splenectomy, or history of autoimmune disease or lymphoproliferative disorder)
  • Positive test for active HBV infection (positive HBsAG test), any HCV infection (positive HCV antibody test), or any HIV-1/2 infection
  • Planned or actual administration of any licensed vaccine within 14 days prior to enrollment. Note: In case an emergency mass vaccination for an unforeseen public health threat (e.g., a pandemic) is organized by the public health authorities, the time period described above can be reduced, if necessary, for that vaccine, provided that it is licensed or authorized and that it is used according to the local governmental recommendations, and provided that a written approval from the Sponsor is obtained
  • Body Mass Index (BMI) ≤19 or ≥35
  • History of systemic administration of corticosteroids (PO/IV/IM) within the last month prior to injection or for more than 14 consecutive days within 3 months prior to injection (i.e., prednisone or equivalent ≥20 mg/day). Inhaled and topical steroids are allowed
  • Administration of antineoplastic, immune-modulating, immunosuppressive agents or chemotherapy within 3 months prior to injection
  • Suspected or known hypersensitivity (including allergy) to any of the vaccine components or medical equipment whose use is foreseen in this trial
  • Concurrently participating in another clinical trial or planned participation at any time during the trial period, in which the participant has been or will be exposed to an investigational or a non-investigational interventional vaccine/product (pharmaceutical product)
  • History of any chronic or progressive disease that according to judgment of the Investigator could interfere with the trial outcomes or pose a threat to the participant's health
  • Received an investigational or non-registered product (medicinal drug or vaccine), within 3 months prior to enrollment or planned use during the trial period
  • Administration of immunoglobulin and/or any blood products within the three months prior to enrollment
  • Blood donation equal or greater to 500 mL of blood drawn within 3 months prior to enrollment
  • Participants with an elective surgical intervention, planned during the trial period until one month after second injection
  • Female participants lactating, pregnant, or intending to become pregnant as reported by the participant

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Germany1 site, 1 recruiting
  • Nuvisan GmbH

    Neu-Ulm, Bavaria, 89231

    Steffen Haffner, Dr.

    Recruiting

Other trials in Germany

About this study

Official title: A First in Human Phase I Randomized and Controlled Trial to Test Safety and Immunogenicity of a Multivalent Vaccine Against Neisseria Gonorrhoeae

The main goal of this trial is to evaluate the safety and immunogenicity of the candidate N. gonorrhoeae vaccine, LTB-NG6.

Read the detailed description

LTB-NG6 is a vaccine including 6 N. gonorrhoeae antigens. During the study, healthy adults will be randomized to receive 1 of 5 different vaccine doses, or a placebo.

Participants will receive a 2-dose schedule.

Being tested
LTB-NG6, Sodium Chloride 0.9%

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • LTB-NG6Biological

    LTB-NG6 administrated at 5 different doses

  • Sodium Chloride 0.9%Other

    sodium chloride 0.9% used as a diluent in LTB-NG6 and as a placebo

Study groups in NCT07758972
Study groupRoleWhat they receive
PlaceboPlacebo comparatorParticipants receive 2 administrations of Sodium chloride 0.9%
Receives: Other: Sodium Chloride 0.9%
Dose 1ExperimentalParticipants receive 2 Dose 1 administrations of the investigational product
Receives: Biological: LTB-NG6
Dose 2ExperimentalParticipants receive 2 Dose 2 administrations of the investigational product
Receives: Biological: LTB-NG6
Dose 3ExperimentalParticipants receive 2 Dose 3 administrations of the investigational product
Receives: Biological: LTB-NG6
Dose 4ExperimentalParticipants receive 2 Dose 4 administrations of the investigational product
Receives: Biological: LTB-NG6
Dose 5ExperimentalParticipants receive 2 Dose 5 administrations of the investigational product
Receives: Biological: LTB-NG6

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Safety: local and systemic AEs (7-days-post)

    To evaluate the safety and tolerability of vaccination with LTB-NG6 in healthy participants after each injection in vaccinees vs. placebo and by dose:

    • Percentage of participants reporting each solicited local and systemic AE during the seven days after each injection (i.e., day of injection and the six subsequent days).

    Measured: During 7 days following each injection

  2. Safety: any events after each injection

    To evaluate the safety and tolerability of vaccination with LTB-NG6 in healthy participants after each injection in vaccinees vs. placebo and by dose:

    • Percentage of participants reporting any adverse event (AE) following each injection
    • Percentage of participants reporting each severity level (Grade 1-4) of solicited local, systemic and unsolicited AEs following each injection

    Measured: During 28 days following each injection

  3. Safety: unsolicited AEs, SAEs, MAAEs

    To evaluate the safety and tolerability of vaccination with LTB-NG6 in healthy participants after each injection in vaccinees vs. placebo and by dose:

    • Percentage of participants with unsolicited AEs.
    • Percentage of participants with serious adverse events (SAEs) following each injection.
    • Percentage of participants with medically attended adverse events (MAAEs) following each injection.

    Measured: Through study completion, an average of 18 months

  4. Immunogenicity - primary IgGs GMT

    To evaluate the immunogenicity of different doses of LTB-NG6 to identify the preferred dose(s). Serum IgG geometric mean titers (GMTs) against each of the N. gonorrhoeae antigens included in LTB-NG6 summarized by treatment group

    Measured: At 28 days after the second injection

Secondary outcomes (3)
  1. Immunogenicity - secondary IgGs

    To expand the evaluation of the immunogenicity of LTB-NG6 for each treatment group at baseline and 28 days after each injection for each of the antigens included in LTB-NG6:

    • Serum IgG GMTs (except for primary endpoint)
    • Serum IgG geometric mean fold ratio (GMFR)
    • Percentage of participants with ≥ 4-fold increase in serum IgG titer.

    Measured: At baseline and 28 days after the second injection

  2. Safety: AEs relatedness to injection, vaccine vs. placebo

    To further evaluate the safety of LTB-NG6. Percentage of participants with solicited local, systemic, unsolicited AEs, and SAEs according to relatedness to injection, in vaccinees vs. placebo.

    Measured: Through study completion, an average of 18 months

  3. Safety: lab abnormalities

    To evaluate changes in hematological and blood chemistry parameters following each injection. Percentage of participants with hematological and blood chemistry laboratory abnormalities at 7 days after each injection compared to baseline in vaccinees vs. placebo.

    Measured: At baseline and 7 days after each injection

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted11 Aug 2026
  2. Study start19 Aug 2026
  3. Primary completion26 Apr 2027 (estimated)
  4. Study completion23 Sep 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Sequential
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
142 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07758972
Sponsor's protocol ID
LTBNG601
Other IDs
OTA No. 75A50122C00028, 224842/Z/21/Z, Agreement Dated 1/30/23, NNF23SA0088536, 2026-526168-19-00
Acronym
LTBNG601
Status last verified
Sep 2026
First submitted
5 Aug 2026
Last updated
23 Sep 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Hedges SR, Mayo MS, Mestecky J, Hook EW 3rd, Russell MW. Limited local and systemic antibody responses to Neisseria gonorrhoeae during uncomplicated genital infections. Infect Immun. 1999 Aug;67(8):3937-46. doi: 10.1128/IAI.67.8.3937-3946.1999.

    PubMed 10417159
  • Petousis-Harris H, Paynter J, Morgan J, Saxton P, McArdle B, Goodyear-Smith F, Black S. Effectiveness of a group B outer membrane vesicle meningococcal vaccine against gonorrhoea in New Zealand: a retrospective case-control study. Lancet. 2017 Sep 30;390(10102):1603-1610. doi: 10.1016/S0140-6736(17)31449-6. Epub 2017 Jul 10.

    PubMed 28705462
  • Russell MW, Jerse AE, Gray-Owen SD. Progress Toward a Gonococcal Vaccine: The Way Forward. Front Immunol. 2019 Oct 15;10:2417. doi: 10.3389/fimmu.2019.02417. eCollection 2019.

    PubMed 31681305
  • Wi T, Lahra MM, Ndowa F, Bala M, Dillon JR, Ramon-Pardo P, Eremin SR, Bolan G, Unemo M. Antimicrobial resistance in Neisseria gonorrhoeae: Global surveillance and a call for international collaborative action. PLoS Med. 2017 Jul 7;14(7):e1002344. doi: 10.1371/journal.pmed.1002344. eCollection 2017 Jul.

    PubMed 28686231
  • Zhu W, Thomas CE, Chen CJ, Van Dam CN, Johnston RE, Davis NL, Sparling PF. Comparison of immune responses to gonococcal PorB delivered as outer membrane vesicles, recombinant protein, or Venezuelan equine encephalitis virus replicon particles. Infect Immun. 2005 Nov;73(11):7558-68. doi: 10.1128/IAI.73.11.7558-7568.2005.

    PubMed 16239559
  • Bruxvoort KJ, Lewnard JA, Chen LH, Tseng HF, Chang J, Veltman J, Marrazzo J, Qian L. Prevention of Neisseria gonorrhoeae With Meningococcal B Vaccine: A Matched Cohort Study in Southern California. Clin Infect Dis. 2023 Feb 8;76(3):e1341-e1349. doi: 10.1093/cid/ciac436.

    PubMed 35642527
  • Abara WE, Bernstein KT, Lewis FMT, Schillinger JA, Feemster K, Pathela P, Hariri S, Islam A, Eberhart M, Cheng I, Ternier A, Slutsker JS, Mbaeyi S, Madera R, Kirkcaldy RD. Effectiveness of a serogroup B outer membrane vesicle meningococcal vaccine against gonorrhoea: a retrospective observational study. Lancet Infect Dis. 2022 Jul;22(7):1021-1029. doi: 10.1016/S1473-3099(21)00812-4. Epub 2022 Apr 12.

    PubMed 35427490
  • Belcher T, Rollier CS, Dold C, Ross JDC, MacLennan CA. Immune responses to Neisseria gonorrhoeae and implications for vaccine development. Front Immunol. 2023 Aug 17;14:1248613. doi: 10.3389/fimmu.2023.1248613. eCollection 2023.

    PubMed 37662926

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing LTB-NG6 and Sodium Chloride 0.9% in people with Neisseria Gonorrhea, run by LimmaTech Biologics AG at 1 site in Germany.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 21 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 23 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Germany. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Steffen Haffner, Dr. (+49 731 9840 452, Steffen.Haffner@nuvisan.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Safety: local and systemic AEs (7-days-post) (time frame: During 7 days following each injection). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07758972, which also lists 8 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 23 Sep 2026.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in