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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT05461131
Other study ID # IB-202P
Secondary ID
Status Completed
Phase Phase 2
First received
Last updated
Start date June 20, 2022
Est. completion date October 26, 2023

Study information

Verified date February 2024
Source ILiAD Biotechnologies
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

This is a randomised, double-blinded, placebo-controlled trial of BPZE1 that includes virulent B. pertussis challenge followed by a safety follow-up.


Description:

This Phase 2b challenge study will investigate colonisation rates, immunologic response, and the safety of BPZE1 vaccination to potentially protect against colonising, virulent wild-type B. pertussis infection in healthy adults using a virulent challenge model. Consenting, eligible participants will receive a single dose of BPZE1 or placebo. 2-4 months later they will be challenged with B. pertussis and admitted to a challenge unit. Participants will remain in the challenge unit for a total of 17 days and 16 nights during which time they will be monitored closely. If a participant develops symptoms of pertussis (per investigator discretion), antibiotic (azithromycin) will be started and the participant will remain in the unit for 3 additional days of observation before discharge. If symptoms of pertussis do not develop, then participants will receive antibiotic (azithromycin) from Days 14-16 of the challenge unit stay. Participants will undergo safety follow-up for at least 6 months post-vaccination and at least 3 months post-challenge, for a total follow-up of 6-7 months.


Recruitment information / eligibility

Status Completed
Enrollment 53
Est. completion date October 26, 2023
Est. primary completion date July 25, 2023
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 18 Years to 50 Years
Eligibility Key Inclusion Criteria: 1. Correctly answer all questions in the questionnaire provided during the consent process to ensure understanding of the study 2. Willing to refrain from any nasal sprays (including intranasal steroid sprays) and nasal washes not part of the study for 14 days prior to vaccination (Day 0) and for 28 days following vaccination and challenge 3. Non-smoker at the time of enrolment, has not smoked (or vaped) in the past 7 days prior to vaccination (including marijuana), and is willing not to smoke (or vape; including marijuana) from the time of vaccination throughout the challenge unit phase 4. Sufficiently vaccinated (per site and local guidelines) against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2; proof of vaccination required) >14 days prior to study vaccination 5. Able to understand and comply with planned study procedures including admission for virulent challenge for 17 days and willingness to take the curative antibiotic regimen (azithromycin after inoculation with B. pertussis) 6. Willing to provide written agreement to and abide by infection control rules from challenge until 1 week following completion of azithromycin eradication Exclusion Criteria: 1. Body mass index <17 or >30 kg/m2 2. History of being vaccinated against pertussis within 5 years of enrolment 3. History of never being vaccinated for pertussis in lifetime 4. A diagnosis of pertussis by laboratory confirmation or by physician diagnosis in the past 5 years 5. Previously participated in a pertussis challenge study 6. Screening laboratory values outside of the normal ranges 7. Existing chronic disorders of lung, kidney, heart, liver, diabetes, immunodeficiency, autoimmune or significant neurologic condition 8. Use of illicit drugs (excluding marijuana), evidenced by urine toxicology at Screening or a history of drug/alcohol abuse within the past 2 years 9. History of active cancer (malignancy) in the last 10 years (except for adequately treated non-melanomatous skin carcinoma) 10. History of Guillain-Barré syndrome (genetic/congenital or acquired) 11. History of head trauma with potential of cribriform plate fracture within 1 year prior to Day 0 12. History of nasal or sinus surgery within 6 months or receipt of facial cosmetic fillers within 3 months prior to Day 0 or diagnosis of nasal polyps 13. Received immunosuppressive therapy or other immune-modifying drugs (including but not limited to systemic corticosteroids, biologics and methotrexate) in the past 6 months, is on scheduled immunosuppressive therapy or is planning to start immunosuppressive therapy during the trial. 14. Received immunoglobulins or any blood products within 3 months prior to study vaccine administration or planned receipt during the study 15. Lives in the same home or has routine contact (face to face <2 meters) with persons with known immunodeficiency including persons on immunosuppressant therapy, from study vaccination to challenge and for 1 week after exiting the challenge unit 16. Resides in the same home, works regularly with, or has contact (face to face <2 meters), with infants less than 1 year of age, partially immunised infants or pregnant women, adults >65 years of age who have not received a dose of acellular pertussis vaccine (e.g. Tdap) within the past 10 years from study vaccination to challenge and for 1 week after exiting the challenge unit 17. Known hypersensitivity to any component of the study vaccine 18. Contraindications or allergic to azithromycin, erythromycin or other macrolide antibiotics 19. Taking medication that may interact with azithromycin (e.g., nelfinavir, warfarin, digoxin and phenytoin) 20. Inability to adhere to the protocol, visit schedule or sample collection needs (including housing in the challenge unit) 21. Participation in any other clinical trial for the testing of an unlicensed product during the previous 3 months or planned during the study conduct

Study Design


Related Conditions & MeSH terms


Intervention

Biological:
BPZE1
Live attenuated vaccine
Placebo
Placebo
Drug:
Azithromycin
Antibiotic
Other:
Bordetella Pertussis Challenge Strain
Challenge Strain

Locations

Country Name City State
United Kingdom Oxford Vaccine Group Oxford
United Kingdom University Hospital Southampton Southampton

Sponsors (1)

Lead Sponsor Collaborator
ILiAD Biotechnologies

Country where clinical trial is conducted

United Kingdom, 

Outcome

Type Measure Description Time frame Safety issue
Primary Number of participants colonized following virulent challenge Participants by treatment group (BPZE1 and placebo) colonised on any day following virulent challenge as determined by culture. Day 9 - 14
Secondary GMFR of mucosal anti-pertussis S-IgA antibody The geometric mean fold rise (GMFR) of mucosal anti-pertussis S-IgA antibody (whole cell extract [WCE], FHA, PRN, PT and fimbriae types 2 and 3 [FIM2/3]) from baseline to Day 28 (BPZE1 and placebo). Secretory IgA to be normalized ([specific S-IgA]/[total S-IgA]) Day 28
Secondary GMFR of serum IgA antibody The GMFR of serum IgA antibody (WCE, FHA, PRN, PT and FIM2/3) from baseline to Day 28 (BPZE1 and placebo) Day 28
Secondary GMFR of serum IgG antibody The GMFR of serum IgG antibody (WCE, FHA, PRN, PT and FIM2/3) from baseline to Day 28 (BPZE1 and placebo) Day 28
Secondary Safety: Solicited AEs for reactogenicity Occurrence and intensity of solicited AEs for nasal/respiratory and systemic reactogenicity through 7 days following vaccination by treatment group (BPZE1 and placebo) Day 7
Secondary Safety: Treatment Emergent Adverse Events Occurrence and intensity of TEAEs through 28 days following study vaccination and following challenge by treatment group (BPZE1 and placebo) Day 28
Secondary Safety: TEAEs Occurrence and intensity of TEAEs related to vaccination from time of vaccination to challenge or related to challenge for 3 months after challenge by treatment group (BPZE1 and placebo) Day 60-120 post vaccination and Day 90 post challenge
Secondary Safety: AESI and SAE Occurrence, intensity, and relationship to study vaccine of AESIs and SAEs from vaccination through end of study (EOS) by treatment group (BPZE1 and placebo) Day 180
See also
  Status Clinical Trial Phase
Active, not recruiting NCT05116241 - Immunogenicity and Safety of BPZE1 Intranasal Pertussis Vaccine in Healthy School-age Children Phase 2
Completed NCT03197597 - EUpertstrain 4 Study of Bordetella Pertussis Isolates N/A
Recruiting NCT05897879 - Impact of Bacterial Expression and Immune Response in the Severity of Pertussis N/A
Completed NCT02983487 - Pertussis Immunization Programs in Low Income Countries
Completed NCT03388034 - Pertussis Immunization Programs in Low Income Countries - Ivory Coast