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RO7446603

Phase 1

Diabetic Macular Edema | Small molecule | Ophthalmology |Roche Holding AG|Last Updated: Jun 23, 2026

Success Probability

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Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials1
Total Enrollment388

FDA Designations

No designations recorded

Clinical trial landscape

RO7446603 · 1 trial · 1 indication

Phase 1 1
NCT06850922A Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Efficacy of RO7446603 Administered Alone or in Combination With Aflibercept or Faricimab in Participants With Diabetic Macular EdemaDiabetic Macular Edema
COMPLETED388 Analytics
PHASE1COMPLETED
A Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Efficacy of RO7446603 Administered Alone or in Combination With Aflibercept or Faricimab in Participants With Diabetic Macular Edema
Diabetic Macular EdemaUnlock trial analytics

Study Endpoints

Primary Endpoints

Parts 1-5: Percentage of Participants With Adverse Events (AEs)
From study start through end of study (Up to approximately 58 months)
Parts 1-5: Percentage of Participants With Ocular AEs
From study start through end of study (Up to approximately 58 months)
Part 1: Change in Best Corrected Visual Acuity (BCVA) Over Time
From Baseline up to Week 16

BCVA will be measured via Early Treatment Diabetic Retinopathy Study (ETDRS) chart at a starting distance of 4 meters using a set of three precision VisionTM or lighthouse distance acuity charts (modified ETDRS Charts 1, 2, and R) prior to dilating eyes by a trained and certified visual acuity (VA) examiner. The range of EDTRS is 0 to 100 letters. Higher scores indicate improvement in VA.

Parts 2-4: Change in BCVA Over Time
From Baseline up to Week 28

BCVA will be measured via ETDRS chart at a starting distance of 4 meters using a set of three precision VisionTM or lighthouse distance acuity charts (modified ETDRS Charts 1, 2, and R) prior to dilating eyes by a trained and certified VA examiner. The range of EDTRS is 0 to 100 letters. Higher scores indicate improvement in VA.

Part 5: Change From Baseline in BCVA Averaged Over Weeks 52 and 56
From Baseline up to Week 56

BCVA will be measured via ETDRS chart at a starting distance of 4 meters using a set of three precision VisionTM or lighthouse distance acuity charts (modified ETDRS Charts 1, 2, and R) prior to dilating eyes by a trained and certified VA examiner. The range of EDTRS is 0 to 100 letters. Higher scores indicate improvement in VA.

Secondary Endpoints

Part 5: Proportion of Participants Gaining ≥ 15 Letters in BCVA From Baseline Averaged Over Weeks 52 and 56
From Baseline up to Week 56
Part 5: Percentage of Participants Gaining ≥ 15, ≥ 10, ≥ 5, or ≥ 0 Letters in BCVA From Baseline Over Time
From Baseline up to Week 56
Part 5: Percentage of Participants Avoiding a Loss of ≥ 15, ≥ 10, ≥ 5, or ≥ 0 Letters in BCVA From Baseline Over Time
From Baseline up to Week 56
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1: Single Ascending Dose (SAD) StageEXPERIMENTALParticipants received a single dose of RO7446603 at five different dose levels as IVT injection on Day 1.
Part 2: Multiple Dose (MD) Monotherapy StageEXPERIMENTALParticipants received four different dose levels of RO7446603 (two doses at each planned dose level) as IVT injection, every 8 weeks (Q8W).
Part 3: MD Co-administration With Aflibercept StageEXPERIMENTALParticipants received two different dose levels (two doses at each planned dose level) of RO7446603 as IVT injection, Q8W along with four doses of aflibercept IVT injections, every 4 weeks (Q4W).
Part 4: MD Co-administration With Faricimab StageEXPERIMENTALParticipants received a single dose of faricimab followed by a 4-week enrichment screening period. Eligible participants received two different dose levels (two doses at each planned dose level) of RO7446603 as IVT injection, Q8W, along with three doses of faricimab (co-administered with RO7446603 or alone) as IVT injection, Q4W.
Part 5: MD Co-mixed With Faricimab StageEXPERIMENTALParticipants will receive two different dose levels of RO7446603 (co-mixed with faricimab or faricimab alone) as IVT injection, Q4W for the first six doses followed by Q8W for four doses.

Interventions

NameTypeDescription
RO7446603DRUGParticipants will receive RO7446603 as an IVT injection per the schedule described in the treatment arms.
AfliberceptDRUGParticipants will receive aflibercept as an IVT injection per the schedule described in the treatment arm.
FaricimabDRUGParticipants will receive faricimab as an IVT injection per the schedule described in the treatment arms.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites77

Inclusion Criteria: * Documented diagnosis of diabetes mellitus (DM) (Type 1 or Type 2) with glycated hemoglobin (HbA1c) \< 12% * Macular thickening secondary to DME involving the center of the fovea \> 325 microns * Decreased VA attributable primarily to DME between 25 and 73 ETDRS letters Exclus...

Countries:United StatesChinaPuerto Rico
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Recent Changes (Last 90 Days)

MEDIUMJul 24, 2026NCT06850922TRIAL_REMOVED: changed
MEDIUMJul 24, 2026NCT06850922TRIAL_REMOVED: changed

Frequently asked questions about RO7446603

What is RO7446603 used for in Diabetic Macular Edema?

RO7446603 is an investigational small molecule being studied for the treatment of Diabetic Macular Edema, a condition that causes vision loss due to fluid accumulation in the macula. It is administered alone or in combination with aflibercept or faricimab in clinical trials.

What does RO7446603 target?

The molecular target of RO7446603 has not been disclosed. It is a small molecule modality being evaluated for its safety, tolerability, pharmacokinetics, and efficacy in participants with Diabetic Macular Edema.

Who makes RO7446603?

RO7446603 is being developed by Roche Holding AG, which trades under the ticker RHHBY. The company is conducting clinical research on this investigational therapy for Diabetic Macular Edema.

What phase is RO7446603 in?

RO7446603 is in Phase 1 clinical development. It is an investigational drug, not yet approved by regulatory authorities, and is being studied for safety, tolerability, pharmacokinetics, and efficacy in Diabetic Macular Edema.

What clinical trials is RO7446603 in?

RO7446603 is associated with clinical trial NCT06850922, a Phase 1 study evaluating the drug alone or in combination with aflibercept or faricimab in participants with Diabetic Macular Edema. The trial enrolled 388 participants and has been completed.

Is RO7446603 the same as aflibercept or faricimab?

No, RO7446603 is a distinct investigational small molecule. Aflibercept and faricimab are separate therapies used as combination partners in the clinical trial evaluating RO7446603 for Diabetic Macular Edema.