A Study to Evaluate the Efficacy, Durability, and Safety of KSI-301 Compared to Aflibercept in Participants With Diabetic Macular Edema (DME) (GLIMMER)
![]() |
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT04603937 |
Recruitment Status :
Active, not recruiting
First Posted : October 27, 2020
Last Update Posted : May 25, 2023
|
- Study Details
- Tabular View
- No Results Posted
- Disclaimer
- How to Read a Study Record
Condition or disease | Intervention/treatment | Phase |
---|---|---|
Diabetic Macular Edema | Drug: KSI-301 Drug: Aflibercept Other: Sham Procedure | Phase 3 |
This is a Phase 3, prospective, randomized, double-masked, two-arm, multi-center non-inferiority study evaluating the efficacy and safety of repeated intravitreal dosing of KSI-301 5 mg in participants with treatment-naïve DME.
The primary endpoint will be assessed at Year 1; additional secondary endpoints for efficacy will be assessed at Years 1 and 2.
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 459 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Intervention Model Description: | Participants will be randomized 1:1 into one of two treatment arms: KSI-301 or aflibercept. |
Masking: | Triple (Participant, Care Provider, Outcomes Assessor) |
Masking Description: | For masking purposes, sham injections will be administered at every monthly visit if an active treatment is not administered. To preserve masking, two investigators are required for this study. The masked Investigator will be responsible for the examinations and safety assessments. The unmasked Investigator will perform the injections and post-treatment assessments. |
Primary Purpose: | Treatment |
Official Title: | A Prospective, Randomized, Double-masked, Active Comparator-controlled, Multi-center, Two-arm, Phase 3 Study to Evaluate the Efficacy and Safety of Intravitreal KSI-301 Compared With Intravitreal Aflibercept in Participants With Visual Impairment Secondary to Treatment-naïve Diabetic Macular Edema (DME) |
Actual Study Start Date : | September 30, 2020 |
Actual Primary Completion Date : | April 27, 2023 |
Estimated Study Completion Date : | February 2024 |
Arm | Intervention/treatment |
---|---|
Experimental: KSI-301 (Arm A)
Intravitreal injection of KSI-301 (5 mg) once every 4 weeks for 3 monthly doses followed by an individualized dosing regimen (every 8 to 24 weeks) via intravitreal injection from Week 16 to Week 100.
|
Drug: KSI-301
Intravitreal Injection Other: Sham Procedure The sham is a procedure that mimics an intravitreal injection. It involves pressing the blunt end of an empty syringe (without a needle) against the anesthetized eye. It will be administered to participants in both treatments arms at applicable visits to maintain masking. |
Active Comparator: Aflibercept (Arm B)
Intravitreal injection of aflibercept (2 mg) once every 4 weeks for 5 monthly doses followed by aflibercept (2 mg) once every 8 weeks via intravitreal injection from Week 24 to 100.
|
Drug: Aflibercept
Intravitreal Injection
Other Name: Eylea Other: Sham Procedure The sham is a procedure that mimics an intravitreal injection. It involves pressing the blunt end of an empty syringe (without a needle) against the anesthetized eye. It will be administered to participants in both treatments arms at applicable visits to maintain masking. |
- Non-inferiority of KSI-301 to Aflibercept measured by changes in BCVA. [ Time Frame: Day 1 to Year 1 ]Demonstrate that KSI-301 5 mg is non-inferior to aflibercept 2 mg with respect to mean change in best corrected visual acuity (BCVA).
- Efficacy of KSI-301 5 mg compared to aflibercept 2 mg measured by changes in BCVA. [ Time Frame: Day 1 to Year 2 ]Improvement in best corrected visual acuity (BCVA).
- Efficacy of KSI-301 5 mg compared to aflibercept 2 mg measured by changes in CST. [ Time Frame: Day 1 to Year 2 ]Improvement in central subfield thickness (CST).
- Efficacy of KSI-301 5 mg compared to aflibercept 2 mg measured by changes in DRSS. [ Time Frame: Day 1 to Year 2 ]Improvement if the diabetic retinopathy severity score (DRSS).
- Durability of KSI-301 5 mg compared to aflibercept 2 mg measured by number of intravitreal injections during the study. [ Time Frame: Day 1 to Year 2 ]Mean number of intravitreal injections during the course of the study.
- Safety and Tolerability of KSI-301 mg compared to aflibercept 2 mg measured by the number of ocular and systemic adverse events. [ Time Frame: Day 1 to Year 2 ]Incidence of ocular and systemic adverse events.

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Signed informed consent prior to participation in the study.
- Treatment-naïve diabetic macular edema, with vision loss and center involvement (if present) diagnosed within 9 months of screening.
- BCVA ETDRS letter score between 78 and 25 (-20/25 to 20/320 Snellen equivalent), inclusive, in the Study Eye.
- CST of ≥ 320 microns on SD-OCT (Heidelberg Spectralis or equivalent on other OCT instruments) as determined by the Reading Center.
- Decrease in vision determined by the Investigator to be primarily the result of DME.
- Type 1 or Type 2 diabetes mellitus and a HbA1c of ≤12%.
- Other protocol-specified inclusion criteria may apply.
Exclusion Criteria:
- Macular edema in the Study Eye considered to be secondary to a cause other than DME.
- Active iris or angle neovascularization or neovascular glaucoma in the Study Eye.
- High-risk proliferative diabetic retinopathy characteristics in the Study Eye.
- History of Pan-retinal Photocoagulation (PRP) laser in the Study Eye within 3 months of screening.
- Tractional retinal detachment in the Study Eye.
- Active retinal disease other than the condition under investigation in the Study Eye.
- Any history or evidence of a concurrent ocular condition present, that in the opinion of the Investigator could require either medical or surgical intervention or affect macular edema or alter visual acuity during the study (e.g., vitreomacular traction, epiretinal membrane).
- Active or suspected ocular or periocular infection or inflammation in either eye at Day 1.
- Any prior use of an approved or investigational treatment for DME in the Study Eye (e.g., anti-VEGF, intraocular or periocular steroids, macular laser photocoagulation).
- Women who are pregnant or lactating or intending to become pregnant during the study.
- Uncontrolled blood pressure defined as a systolic value ≥ 180 mmHg or diastolic value ≥100 mmHg while at rest.
- Recent history (within the 6 months prior to screening) of myocardial infarction, stroke, transient ischemic attack, acute congestive heart failure or any acute coronary event.
- History of a medical condition that, in the judgment of the Investigator, would preclude scheduled study visits, completion of the study, or a safe administration of investigational product.
- Other protocol-specified exclusion criteria may apply.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04603937

Study Director: | Pablo Velazquez-Martin, MD | Kodiak Sciences Inc |
Responsible Party: | Kodiak Sciences Inc |
ClinicalTrials.gov Identifier: | NCT04603937 |
Other Study ID Numbers: |
KS301P105 2020-001063-82 ( EudraCT Number ) |
First Posted: | October 27, 2020 Key Record Dates |
Last Update Posted: | May 25, 2023 |
Last Verified: | May 2023 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Kodiak Diabetic retinopathy Diabetic macular edema Macular edema DME Vascular endothelial growth factor Anti-VEGF VEGF Antibody biopolymer conjugate Retinal Degeneration |
Retinal Diseases Eye Diseases Vision Disorders Vision, low Aflibercept Eylea Diabetes mellitus Diabetes KSI-301 |
Macular Edema Edema Macular Degeneration Retinal Degeneration Retinal Diseases Eye Diseases Aflibercept |
Angiogenesis Inhibitors Angiogenesis Modulating Agents Growth Substances Physiological Effects of Drugs Growth Inhibitors Antineoplastic Agents |