Safety and Immunogenicity of a Chlamydia Vaccine CTH522

Summary

CHLM-02 was a phase I, double-blind, randomized, placebo-controlled trial of the chlamydia vaccine CTH522. 65 trial participants were randomized into 12 groups and six cohorts (A1 to F2). Cohorts A to E received three intramuscular (IM) injections of CTH522 (Day 0, 28, and 112). Cohorts A to D received CTH522 adjuvanted with Cationic Adjuvant Formulation (CAF®) 01 IM in two doses (85µg \[A to C\] or 15µg \[D\]). Cohort E received 85µg CTH522 adjuvanted with CAF®09b. Cohorts B and C received unadjuvanted CTH522 boost via the topic ocular (TO) or intradermal (ID) route, respectively, jointly with the second and third IM vaccinations. Cohort F received placebo. The effect of mucosal recall on eye immunity with TO CTH522 or placebo was assessed Day 140.

Conditions

• Trachoma

Interventions

BIOLOGICAL

CTH522-CAF01 IM

On-site reconstitution of IMPs is performed by mixing 85 mcg CTH522 with CAF01. The preferred for IM is in the non-dominant deltoid muscle. IM injection will be performed with a 1-2 mL polypropylene Luer-Lok™ syringe via 23-25 gauge needle. The identity of the injected trial vaccine will be known to the clinical site staff dispensing and/or injecting the trial vaccine to the subject and by the unblinded trial monitor. The identity of the trial vaccine administered will remain unknown to the subject during the trial.

BIOLOGICAL

CTH522-CAF09b IM

On-site reconstitution of IMPs is performed by mixing 85 mcg CTH522 with CAF09b. The preferred for IM is in the non-dominant deltoid muscle. IM injection will be performed with a 1-2 mL polypropylene Luer-Lok™ syringe via 23-25 gauge needle. The identity of the injected trial vaccine will be known to the clinical site staff dispensing and/or injecting the trial vaccine to the subject and by the unblinded trial monitor. The identity of the trial vaccine administered will remain unknown to the subject during the trial.

BIOLOGICAL

CTH522 ID

24 mcg CTH522 given ID is in the non-dominant deltoid muscle. ID with a 1 mL syringe via a 26-28 gauge needle using a NanoPass device or similar. The identity of the injected trial vaccine will be known to the clinical site staff dispensing and/or injecting the trial vaccine to the subject and by the unblinded trial monitor. The identity of the trial vaccine administered will remain unknown to the subject during the trial.

BIOLOGICAL

CTH522 TO

24 mcg CTH522 (12 mcg in each eye) TO administrations will be performed using a Gilson positive displacement pipette. The identity of vaccine will be known to the clinical site staff dispensing/administrating the trial vaccine to the subject and by the unblinded trial monitor. The identity of the trial vaccine administered will remain unknown to the subject during the trial.

BIOLOGICAL

Placebo (Saline)

Placebo only given as IM, ID and TO.

Sponsors & Collaborators

• Imperial College London

  collaborator OTHER

• Statens Serum Institut

  lead OTHER

Principal Investigators

• Alvaro Borges, MD · Statens Serum Institut

• Katrina Pollock, MD · Imperial Clinical Research Facility Hammersmith Hospital

• Lina S Stoey, MPH · Statens Serum Institut

• Pernille N Tingskov, BS · Statens Serum Institut

• Rebecca B Dohn, Pharm · Statens Serum Institut

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

QUADRUPLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

45 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2020-02-17

Primary Completion

2022-02-22

Completion

2022-02-22

Countries

• United Kingdom

Study Locations