Open Label, Sequential-dose Study of PA5108 Latanoprost FA SR Ocular Implant for Mild-moderate Glaucoma

December 22, 2022 updated by: PolyActiva Pty Ltd

An Open Label, Comparative, Sequential-dose, Multi-centre Study Involving Intracameral Administration of a PA5108 Latanoprost FA SR Ocular Implant Into the Eye of Patients With Mild-moderate Glaucoma

This is a multi-centre, open label, interventional, comparative, phase I study to identify a safe and efficacious dose (within the range of 14.7mcg to 35.5 mcg) of PA5108 (PolyActiva product code) Latanoprost free acid (FA) sustained release (SR) Ocular Implant in adults who have Primary Open Angle Glaucoma.

Study Overview

Status

Recruiting

Conditions

Detailed Description

This is a multi-centre, open label, interventional, comparative, phase Ib dose ranging study to identify a safe and efficacious dose (within the range of 14.7 to 35.5 microgram) of PA5108 Latanoprost FA SR Ocular Implant in adults who have Primary Open Angle Glaucoma (POAG).

The proposed study is a single ascending dose design to determine the minimum effective dose that provides the target of >20% IOP lowering effect at 12 weeks with minimal adverse events.

Up to three single-dose cohorts will be assessed from the following implant strengths:

  • 35.5 microgram
  • 26.6 microgram
  • 14.7 microgram

In addition, a repeat-dose cohort will be assessed from the following implant strength:

o 14.7 microgram

A first cohort of participants will be recruited and dosed with the 14.7 mcg PA5108 Latanoprost FA SR Ocular Implant. A second cohort of participants will be recruited after SMC review of 6-week data of the first cohort and dosed with the 26.6 mcg PA5108 Latanoprost FA SR Ocular Implant. A third cohort of participants will be recruited after SMC review of 6-week data of the second cohort and repeat-dosed with 14.7 mcg PA5108 Latanoprost FA SR Ocular Implant. A fourth cohort of participants will be recruited and dosed with the 35.5 mcg PA5108 Latanoprost FA SR Ocular Implant

Prior to study registration, participants will have been medicated with intraocular pressure (IOP) lowering drop therapy, including a prostaglandin analogue, to manage their POAG. The IOP lowering drops will be stopped in the intent to treat eye within 29 to 43 days prior to the date of implant administration. Participants will be required to have an unmedicated (post wash-out) 8:00am IOP ≥ 24 mmHg and ≤ 36mmHg in the intent to treat eye at either of two screening visits 2-weeks apart. Additionally, the IOP at 12:00 noon and 4:00 pm must be ≥ 20mmHg and ≤ 36mmHg on the same screening visit where the 8:00am IOP was ≥ 24 mmHg and ≤ 36mmHg.

The PA5108 Latanoprost FA SR Ocular Implant will be administered to one eye (unilateral) of each participant.

IOP will be monitored and if after implant administration is found to rise ≥30% over baseline in the study eye, IOP lowering eye drops will be restarted.

The study will recruit up to 10 participants per cohort/dose level. After screening, eligible participants enrolled in the single-dose cohorts will be administered a single PA5108 Latanoprost FA SR Ocular Implant by clear corneal injection to the anterior chamber of the eye, by means of a custom-built injector fitted with a 27G pre-loaded needle at Day 0. Whereas eligible participants enrolled in the repeat-dose cohort will be administered a single PA5108 Latanoprost FA SR Ocular Implant by clear corneal injection to the anterior chamber of the eye, by means of a custom-built injector fitted with a 27G pre-loaded needle at Day 0, and again at Week 21.

The study will end at the later of Visit 12 (48-weeks) for the last participant in the repeat dose cohort, or when the last of the study implants are no longer visible in the study eye and the IOP in the same eye has returned to a normal clinical care range, or 12-weeks has passed since the implant was no longer visible regardless of IOP.

Participants in the single dose cohorts will attend the study site for follow up on Day 1 post implant administration, and then Week 6, 12, (optionally 15), 18, (optionally 21), 26, 32 and if required subsequent 6-week intervals until the implant has completely biodegraded and the IOP of the same eye has returned to normal clinical care range or 12-weeks has passed since the implant was no longer visible. Implant biodegradation will be confirmed by biomicroscopy and gonioscopy examination at Week 6, 12, optionally 15, 18, optionally 21, 26 & 32, and if necessary, every 6-weeks thereafter.

Participants in the repeat dose cohort will attend the study site for follow up on Day 1 post implant administration, and then Week 6, 12,18, Week 21 (when they will be administered the second dose), Day 1 post repeat dose, Week 27, 33, 42, 48 and if required subsequent 6-week intervals until the implant has completely biodegraded and the IOP of the same eye has returned to normal clinical care range or 12-weeks has passed since the implant was no longer visible. Implant biodegradation will be confirmed by biomicroscopy and gonioscopy examination at Week 6,12,18, 21,27, 33,42 & 48, and if necessary, every 6-weeks thereafter.

Study Type

Interventional

Enrollment (Anticipated)

40

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

    • New South Wales
      • Castle Hill, New South Wales, Australia, 2150
        • Recruiting
        • Personaleyes
      • Macquarie Park, New South Wales, Australia, 2109
        • Withdrawn
        • Macquarie Hospital
    • South Australia
      • Millswood, South Australia, Australia, 5034
        • Recruiting
        • Goodwood Eye Centre
    • Victoria
      • Bendigo, Victoria, Australia, 3550
        • Recruiting
        • Bendigo Eye Clinic
      • East Melbourne, Victoria, Australia, 3002
        • Recruiting
        • Centre for Eye Research Australia
      • Essendon, Victoria, Australia, 3040
        • Recruiting
        • Essendon Eye Clinic
      • Fitzroy, Victoria, Australia, 3065
        • Recruiting
        • Melbourne Eye Specialists
        • Contact:
          • Michael Coote
      • Springvale, Victoria, Australia, 3171
        • Recruiting
        • Eyes First
      • Vermont South, Victoria, Australia, 3133
        • Recruiting
        • Eye Surgery Associates
      • Te Aro, New Zealand, 6011
        • Not yet recruiting
        • Capital Eye Specialists

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

Participants who:

  • Diagnosis of primary open angle glaucoma.
  • Unmedicated 8:00am IOP ≥ 24 mmHg and ≤ 36mmHg in the intent to treat eye. Additionally, the IOP at 12:00 and 16:00 hrs must be ≥ 20mmHg and ≤ 36mmHg.
  • Corrected visual acuity in each eye greater than or equal to +0.3logMAR.
  • Minimum central endothelial cell density of greater than or equal to 1600 cells per mm2
  • Currently managing their POAG with IOP lowering drop therapy.

Exclusion Criteria:

Participants who:

  • Have pseudoexfoliation or pigment dispersion component, history of angle closure, or narrow angles.
  • Have a history of or current ocular inflammation.
  • Have aphakic eyes or only one eye.
  • Recent surgery in the study eye surgery (including laser).
  • Clinically significant ocular disease in either eye (e.g., corneal oedema, uveitis, severe keratoconjunctivitis sicca or infection) which might interfere with the study.
  • Known sensitivity to any component of the product (e.g. latanoprost or polytriazole sensitivity), or to topical therapy used during course of study (e.g. povidone iodine, or anaesthetics).
  • Ocular medication in either eye of any kind within 30 days of screening.
  • Central corneal thickness in either eye that is less than 470 µm or greater than 630 µm at screening (or a difference between the eyes >70 µm).
  • Any abnormality in either eye preventing reliable applanation tonometry, including aphakic eyes or significant corneal guttatae.
  • Any other clinically significant disease (as determined by physician) which might interfere with the study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: 14.7 mcg (single dose)
PA5108 Latanoprost FA SR Ocular Implant which releases 14.7 mcg.
Ocular Implant
Other Names:
  • PA5108
Experimental: 26.6 mcg (single dose)
PA5108 Latanoprost FA SR Ocular Implant which releases 26.6 mcg.
Ocular Implant
Other Names:
  • PA5108
Experimental: 35.5 mcg (single dose)
PA5108 Latanoprost FA SR Ocular Implant which releases 35.5 mcg.
Ocular Implant
Other Names:
  • PA5108
Experimental: 14.7 mcg (repeat dose)
Repeat dose of PA5108 Latanoprost FA SR Ocular Implant which releases 14.7 mcg.
Ocular Implant
Other Names:
  • PA5108

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Effective dose
Time Frame: Intraocular Pressure (IOP) change measured at; baseline, week 12 and week 26.
Determine the minimum effective dose (as daily release rate of LtpFA) that achieves an IOP lowering effect >20% with minimal adverse events.
Intraocular Pressure (IOP) change measured at; baseline, week 12 and week 26.
Safety and Tolerability-incidence of treatment emergent Adverse Events
Time Frame: Incidence of Treatment-Emergent Adverse Events throughout the study (up to 1 year).
Assess the safety and tolerability of PA5108 Latanoprost FA SR Ocular Implant in adults with Open Angle Glaucoma (Primary). Incidence of Treatment-Emergent Adverse Events from visit 1 until end of study. Safety laboratory evaluations (biochemistry, haematology, urinalysis). Physical examinations and vital signs. Changes in ocular examinations from baseline to end of study.
Incidence of Treatment-Emergent Adverse Events throughout the study (up to 1 year).

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Ease of Use
Time Frame: At visit 2-Day 0, after use of device to insert the implant into the eye.
Assess the ease of use of the bespoke administration device- Administering ophthalmologist's assessment of ease of use of the bespoke administration device, verbal communication.
At visit 2-Day 0, after use of device to insert the implant into the eye.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: Michael Coote, Melbourne Eye Specialists

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

March 11, 2020

Primary Completion (Anticipated)

August 31, 2023

Study Completion (Anticipated)

August 31, 2023

Study Registration Dates

First Submitted

August 5, 2019

First Submitted That Met QC Criteria

August 16, 2019

First Posted (Actual)

August 19, 2019

Study Record Updates

Last Update Posted (Estimate)

December 26, 2022

Last Update Submitted That Met QC Criteria

December 22, 2022

Last Verified

December 1, 2022

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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