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KSI-101

Phase 3

Macular Edema Secondary to Inflammation | Small molecule | Ophthalmology |Kodiak Sciences Inc|Trials Updated: May 18, 2026

KSI-101 development status

Highest phase Phase 3
Registered trials 2 across 1 sponsor since May 2025

KSI-101 target and mechanism

Molecular targetIL-6/VEGF
ModalitySmall molecule

Also known as tabirafusp alfa

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindSHAM_CONTROLLEDDMC
Total Trials2
Total Enrollment900

FDA Designations

No designations recorded

KSI-101 clinical trials

KSI-101 · 2 trials · 1 indication

Phase 3 2
NCT06990399A Phase 3 Study to Evaluate the Efficacy and Safety of Intravitreal KSI-101 in Participants With Macular Edema Secondary to Inflammation (MESI) - PEAKMacular Edema Secondary to Inflammation
RECRUITING600 Analytics
NCT06996080A Phase 3 Study to Evaluate the Efficacy and Safety of Intravitreal KSI-101 in Participants With Macular Edema Secondary to Inflammation (MESI) - PINNACLEMacular Edema Secondary to Inflammation
RECRUITING300 Analytics
PHASE3RECRUITING
A Phase 3 Study to Evaluate the Efficacy and Safety of Intravitreal KSI-101 in Participants With Macular Edema Secondary to Inflammation (MESI) - PEAK
Macular Edema Secondary to InflammationUnlock trial analytics
PHASE3RECRUITING
A Phase 3 Study to Evaluate the Efficacy and Safety of Intravitreal KSI-101 in Participants With Macular Edema Secondary to Inflammation (MESI) - PINNACLE
Macular Edema Secondary to InflammationUnlock trial analytics

Study Endpoints

Primary Endpoints

Mean change in BCVA
Week 24

Mean change in BCVA from Day 1 to the average of Week 20 and Week 24.

Secondary Endpoints

Proportion of participants with BCVA improvement
Baseline to 24 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
KSI-101 5 mgEXPERIMENTALIntravitreal injection of KSI-101 5 mg once every 4 weeks for 6 monthly doses followed by individualized dosing
KSI-101 10 mgEXPERIMENTALIntravitreal injection of KSI-101 10 mg once every 4 weeks for 6 monthly doses followed by individualized dosing
ShamSHAM_COMPARATORSham injection once every 4 weeks for 6 monthly doses followed by individualized sham dosing

Interventions

NameTypeDescription
KSI-101DRUGIntravitreal injection
Sham ComparatorOTHERSham injections
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites56

Inclusion Criteria: * Macular Edema Secondary to Inflammation (MESI) with a central subfield thickness (CST) of ≥400 microns on SD-OCT in Study Eye. * Definitive presence of Intraretinal Fluid and/or Subretinal Fluid on SD-OCT in the Study Eye. * BCVA ETDRS score of ≥25 and ≤70 letters (between 20/...

Countries:United StatesPuerto Rico
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Frequently asked questions about KSI-101

What is KSI-101 used for?

KSI-101 is an investigational small molecule being developed for the treatment of macular edema secondary to inflammation (MESI), a condition affecting the retina. It is administered via intravitreal injection and is currently in Phase 3 clinical trials.

What does KSI-101 target?

KSI-101 targets IL-6 and VEGF, two proteins involved in inflammation and blood vessel growth. By inhibiting these targets, the drug aims to reduce retinal swelling and improve vision in patients with macular edema secondary to inflammation.

Who makes KSI-101?

KSI-101 is being developed by Kodiak Sciences Inc (NASDAQ: KOD), a biopharmaceutical company focused on treatments for eye diseases. The company is currently conducting Phase 3 trials to evaluate the drug's safety and efficacy.

What phase is KSI-101 in?

KSI-101 is in Phase 3 clinical development. It is not yet approved by the FDA and remains investigational. Two Phase 3 trials, PINNACLE and PEAK, are currently recruiting participants to assess the drug for macular edema secondary to inflammation.

What clinical trials is KSI-101 in?

KSI-101 is being studied in two Phase 3 trials: PINNACLE (NCT06996080) with 300 participants and PEAK (NCT06990399) with 600 participants. Both are randomized, double-blind, sham-controlled studies enrolling adults in the United States and Puerto Rico.

Is KSI-101 the same as other drugs for macular edema?

KSI-101 is a distinct investigational drug that uniquely targets both IL-6 and VEGF. It is not known to be the same as any other approved medication. Its dual-target mechanism may differentiate it from existing therapies for macular edema secondary to inflammation.