Safety of Chlamydia Vaccine CTH522 in Healthy Women Aged 18 to 45 Years

A Phase I First in Human, Double-blind, Parallel, Randomised and Placebo Controlled Clinical Trial of the Safety of SSI's Adjuvanted Chlamydia Vaccine CTH522 in Healthy Women Aged 18 to 45 Years

The present trial is a phase I first in human, double blind, parallel and placebo controlled trial of SSI's adjuvanted chlamydia vaccine CTH522: CTH522-CAF01 (CAF01 is an adjuvant system) and CTH522-Al(OH)3. The trial will be conducted at Imperial College Research site in the United Kingdom.

Subjects are randomly assigned to one of the following three treatment groups in a ratio of 3:3:1.

This trial consisted of 10 visits and 5 telephonic interviews

Study Overview

• Status: Completed
• Conditions: Chlamydia Trachomatis
• Intervention / Treatment: Biological: CTH522-CAF01; Biological: CTH522-Al(OH)3; Biological: Placebo

• Study Type: Interventional
• Enrollment (Actual): 35
• Phase: Phase 1

Contacts and Locations

Study Locations

• United Kingdom
  • London, United Kingdom, W12 0HS
    • NIHR/Wellcome Trust Imperial Clinical Research Facility, Hammersmith Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 45 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Female

Description

Inclusion Criteria:

1. Is a healthy female between 18 and 45 years of age on the day of first trial vaccination
2. Has provided signed informed consent
3. Is willing and likely to comply with the trial procedures
4. Is prepared to grant authorised persons access to their medical record

5. Willing to use acceptable contraceptive measures* during the trial (2 weeks before and 2 weeks after the trial)

   • Heterosexually active female capable of becoming pregnant must (in addition to requiring male partner to use condoms) agree to use hormonal contraception, or to complete abstinence, from at least 2 weeks before the first vaccination until at least 2 weeks after the last. (Note: Periodic abstinence [e.g. calendar, ovulation, symptothermal, post-ovulation methods] and withdrawal and intrauterine device or intrauterine hormone releasing system and progestogen-only oral hormonal contraception, where inhibition of ovulation is not the primary mode of action, are not acceptable methods of contraception)

Exclusion Criteria:

1. Has confirmed history of Pelvic Inflammatory Disease or significant gynaecological diseases
2. Is positive for C. trachomatis (PCR)
3. Is positive for gonorrhoea (urine), HIV, Hepatitis B/C, syphilis (blood)
4. Has a positive pregnancy test
5. Has a significant active disease - such as cardiac, liver, immunological, neurological, psychiatric; or clinically significant abnormality of haematological or biochemical parameters.
6. Has BMI of 35 kg/m2 or greater
7. Is currently participating in another clinical trial with an investigational or noninvestigational drug or device
8. Has received, or plans to receive, an active immunisation within 14 days of the start of the trial or any of the immunisation visits in this trial
9. Is currently receiving treatment with immunosuppressive agents e.g. oral, inhaled, nasal or injected corticosteroids. (Topical steroids are allowed, unless applied to the IM injection site.)
10. Is using an intrauterine device
11. Has a condition which in the opinion of the investigator is not suitable for participation in the trial
12. Known or confirmed allergy to any of the vaccine constituents -

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Quadruple

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: CTH522-CAF01; CTH522-CAF01: CTH522 chlamydia antigen adjuvanted with CAF01 for IM administration (preferably the non-dominant arm) CTH522 chlamydia antigen diluted with Tris buffer for IN administration	Biological: CTH522-CAF01; CTH522 chlamydia antigen adjuvanted with CAF01 for IM administration
Experimental: CTH522-Al(OH)3; CTH522-Al(OH)3: CTH522 chlamydia antigen adjuvanted with aluminium hydroxide, Al(OH)3 , for IM administration (preferably the non-dominant arm) CTH522 chlamydia antigen diluted with Tris buffer for IN administration	Biological: CTH522-Al(OH)3; CTH522 chlamydia antigen adjuvanted with aluminium hydroxide, Al(OH)3 , for IM administration
Placebo Comparator: Placebo; Saline for IM and In administrations	Biological: Placebo; Saline

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Evaluation of adverse events/reactions and laboratory safety of adjuvanted chlamydia vaccine	Solicited local injection site reactions (recorded at any visit) after intramuscular (IM) administration (pain, erythema, tenderness, pruritus, warmth, stiffness and swelling) Solicited local reactions (recorded at any visit) after IN administration (discharge, including bleeding, congestion, discomfort, sneezing and cough) Solicited systemic reactions (recorded at any visit) after IM and IN administration (abnormally raised temperature, chills, myalgia, malaise, fatigue, rash, headache, nausea and vomiting, and clinically significant abnormal values among full blood count, liver function test and renal profile results)	Through study completion (Day 0 to Day 168)

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Serum immunoglobulin G antibody responses after vaccination with CTH522	Percentage of subjects achieving seroconversion for anti-CTH522 immunoglobulin G antibody at any time points after IM vaccination(s)	At Days 0, 28, 112, 126, 140, 154 and 168

Collaborators and Investigators

• Sponsor: Statens Serum Institut
• Collaborators: Imperial College London
• Investigators: Principal Investigator: Sonya Abraham, Imperial College London

Publications and helpful links

General Publications

• Abraham S, Juel HB, Bang P, Cheeseman HM, Dohn RB, Cole T, Kristiansen MP, Korsholm KS, Lewis D, Olsen AW, McFarlane LR, Day S, Knudsen S, Moen K, Ruhwald M, Kromann I, Andersen P, Shattock RJ, Follmann F. Safety and immunogenicity of the chlamydia vaccine candidate CTH522 adjuvanted with CAF01 liposomes or aluminium hydroxide: a first-in-human, randomised, double-blind, placebo-controlled, phase 1 trial. Lancet Infect Dis. 2019 Oct;19(10):1091-1100. doi: 10.1016/S1473-3099(19)30279-8. Epub 2019 Aug 12.

Study record dates

Study Major Dates

• Study Start: July 1, 2016
• Primary Completion (Actual): July 31, 2017
• Study Completion (Actual): July 31, 2017

Study Registration Dates

• First Submitted: May 23, 2016
• First Submitted That Met QC Criteria: May 26, 2016
• First Posted (Estimate): June 1, 2016

Study Record Updates

• Last Update Posted (Actual): August 10, 2017
• Last Update Submitted That Met QC Criteria: August 8, 2017
• Last Verified: August 1, 2017

More Information

Terms related to this study

• Keywords: Safety; Immunogenicity; Phase I
• Additional Relevant MeSH Terms: Infections; Communicable Diseases; Sexually Transmitted Diseases; Gram-Negative Bacterial Infections; Bacterial Infections; Bacterial Infections and Mycoses; Chlamydiaceae Infections; Sexually Transmitted Diseases, Bacterial; Chlamydia Infections
• Other Study ID Numbers: CHLM-01

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: No