- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03484507
Parasitic Ulcer Treatment Trial Pilot
Study Overview
Status
Conditions
Detailed Description
Acanthamoeba keratitis is a rare eye infection that is difficult to treat. The mainstay of therapy is a biguanide agent such as chlorhexidine, though recent studies have found povidone iodine to be effective for killing acanthamoeba organisms in vitro. Thus, we randomize participants to topical chlorhexidine 0.04% monotherapy (i.e., routine care) versus topical chlorhexidine 0.04% plus topical poviodine iodine 2.5%. The primary outcome is clearance of acanthamoeba from the ocular surface at 4 weeks.
The role of topical corticosteroids in acanthamoeba keratitis is controversial. Topical corticosteroids can promote growth of acanthamoeba, but may also reduce inflammation and vision-threatening complications of infection. Here, we randomize participants who have completed a course of anti-amoebic therapy to one of three groups: early prednisolone sodium phosphate 1% (started at 4 weeks), late prednisolone sodium phosphate 1% (started at 6 weeks) or placebo (started at 4 weeks). The primary outcome will be visual acuity at 6 months.
Study Type
Enrollment (Actual)
Phase
- Phase 2
Contacts and Locations
Study Contact
- Name: Jeremy D Keenan, MD
- Phone Number: 415-476-1442
- Email: jeremy.keenan@ucsf.edu
Study Contact Backup
- Name: Caitlin Moe, MPH
- Phone Number: 415-502-2665
- Email: caitlin.moe@ucsf.edu
Study Locations
-
-
Tamil Nadu
-
Coimbatore, Tamil Nadu, India
- Aravind Eye Hospital
-
Madurai, Tamil Nadu, India
- Aravind Eye Hospital
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Trial 1 Inclusion Criteria:
- Smear or culture positive for acanthamoeba
- Age 13 years or greater
Trial 1 Exclusion Criteria:
- Interstitial or viral keratitis on history or examination
- Corneal perforation
- Therapeutic keratoplasty for acanthamoeba keratitis
- Unwillingness or inability to follow-up (e.g., living too far from hospital)
Trial 2 Inclusion Criteria
- Smear or culture positive for acanthamoeba, with 4 weeks of anti-amoebic treatment
- Age 13 years or greater
- Willing to participate in study
Trial 2 Exclusion Criteria
- Interstitial or viral keratitis on history or examination
- Fungus identified on culture and smear after 2 weeks of anti-amoebic treatment
- Corneal perforation
- Therapeutic keratoplasty for acanthamoeba keratitis
- Unwillingness or inability to follow-up (e.g., living too far from hospital)
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Chlorhexidine monotherapy
Topical chlorhexidine 0.04%
|
1 drop half-hourly for days 1-2, then hourly for days 3-6, then 8 times daily until the 4-week visit
|
Experimental: Chlorhexidine plus povidone iodine
Topical chlorhexidine 0.04% plus povidone iodine 2.5%
|
1 drop half-hourly for days 1-2, then hourly for days 3-6, then 8 times daily until the 4-week visit
1 drop half-hourly for days 1-2, then hourly for days 3-6, then 8 times daily until the 4-week visit
|
Experimental: Early corticosteroids
Topical prednisolone sodium phosophate 1% for weeks 4-11
|
1 drop 4 times daily for weeks 4-9, then 2 times daily for weeks 10-11
1 drop 4 times daily for weeks 6-9, then 2 times daily for weeks 10-11
|
Experimental: Late corticosteroids
Artificial tears for weeks 4-5, then topical prednisolone sodium phosophate 1% for weeks 6-11
|
1 drop 4 times daily for weeks 4-9, then 2 times daily for weeks 10-11
1 drop 4 times daily for weeks 6-9, then 2 times daily for weeks 10-11
1 drop 4 times daily for weeks 4-9, then 2 times daily for weeks 10-11
1 drop 4 times daily for weeks 4-5
|
Placebo Comparator: Placebo
Artificial tears for weeks 4-11
|
1 drop 4 times daily for weeks 4-9, then 2 times daily for weeks 10-11
1 drop 4 times daily for weeks 4-5
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Trial 1: Microbial clearance
Time Frame: 4 weeks
|
Acanthamoeba culture
|
4 weeks
|
Trial 2: Best spectacle corrected visual acuity
Time Frame: 6 months
|
6 months
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Trial 1: Best spectacle corrected visual acuity
Time Frame: 4 weeks
|
4 weeks
|
Trial 1: Time to re-epithelialization
Time Frame: 4 weeks
|
4 weeks
|
Trial 1: Clinical cure
Time Frame: 4 weeks
|
4 weeks
|
Trial 2: Time to clinical cure
Time Frame: 6 months
|
6 months
|
Collaborators and Investigators
Collaborators
Investigators
- Principal Investigator: Jeremy D Keenan, MD, University of California, San Francisco
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Estimated)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Infections
- Eye Diseases
- Parasitic Diseases
- Protozoan Infections
- Corneal Diseases
- Eye Infections
- Amebiasis
- Eye Infections, Parasitic
- Keratitis
- Acanthamoeba Keratitis
- Physiological Effects of Drugs
- Anti-Infective Agents, Local
- Anti-Infective Agents
- Autonomic Agents
- Peripheral Nervous System Agents
- Anti-Inflammatory Agents
- Antineoplastic Agents
- Antiemetics
- Gastrointestinal Agents
- Glucocorticoids
- Hormones
- Hormones, Hormone Substitutes, and Hormone Antagonists
- Antineoplastic Agents, Hormonal
- Neuroprotective Agents
- Protective Agents
- Disinfectants
- Plasma Substitutes
- Blood Substitutes
- Prednisolone
- Methylprednisolone Acetate
- Methylprednisolone
- Methylprednisolone Hemisuccinate
- Prednisolone acetate
- Prednisolone hemisuccinate
- Prednisolone phosphate
- Chlorhexidine
- Povidone-Iodine
- Povidone
Other Study ID Numbers
- UCSF-IRB-17-23895
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
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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