Efficacy and Safety of RC28-E Versus Aflibercept in Diabetic Macular Edema

Phase 3

Recruiting

• Conditions: Diabetic Macular Edema
• Interventions: Biological: RC-28E; Biological: Aflibercept

• Registration Number: NCT05885503
• Lead Sponsor: RemeGen Co., Ltd.

Brief Summary

The purpose of this study is to evaluate efficacy and safety of RC28-E compared with Aflibercept in subjects with diabetic macular edema.

Detailed Description

Not available

Study Timeline

• Status Verified: 2023-05
• Study First Submitted: 2023-05-19
• Study First Submitted QC: 2023-05-30
• Study First Posted: 2023-06-02
• Study Start: 2023-06-08
• Last Update Submitted: 2023-08-30
• Last Update Posted: 2023-09-05
• Primary Completion: 2026-06
• Study Completion: 2026-06

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 316

Inclusion Criteria

• Documented diagnosed with type I or type II diabetes mellitus.

• Hemoglobin A1c (HBA1c) of less than or equal to (≤) 10% within 2 months prior to Day 1.

• Ability and willingness to undertake all scheduled visits and assessments.

• The study eye must meet the following requirements:

  • macular thickening secondary to diabetic macular edema (DME) involving the center of the fovea.
  • decreased visual acuity attributable primarily to DME, the best corrected visual acuity (BCVA) 19 or more letters, 78 letters or less.

Exclusion Criteria

• The study eye with high risk of proliferative diabetic retinopathy.
• The macular edema of the study eye is mainly caused by other diseases or factors other than DME.
• Treatment with panretinal photocoagulation or macular laser within 3 months prior to Day 1 to the study eye.
• Administration of IVT any other anti-VEGF drugs in the study eye within 3 months and/or in the other eye within 7 days prior to Day 1.
• Any intraocular long-acting or sustained release corticosteroid treatment (e.g., dexamethasone intravitreal implant) in the study eye within 6 months prior to Day 1.
• Active intraocular or periocular infection or active intraocular inflammation in either eye.
• The study eye with poorly controlled glaucoma.
• A history of idiopathic or autoimmune related uveitis in either eye.
• History of stroke (cerebrovascular accident) or myocardial infarction within 6 months prior to Day 1.
• Uncontrolled blood pressure, defined as a systolic value greater than (>)180 millimeters of mercury (mmHg) and/or a diastolic value >100 mmHg while a patient is at rest.
• Currently pregnant or breastfeeding, or intend to become pregnant during the study.
• Any current or history of ocular disease other than DME that may confound assessment of the macula or affect central vision in the study eye.
• Any current ocular condition which, in the opinion of the investigator, is currently causing or could be expected to contribute to irreversible vision loss due to a cause other than DME in the study eye.
• Other protocol-specified inclusion/exclusion criteria may apply.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
RC-28E	RC-28E	RC-28E 2.0 mg will be initially intravitreal injected (IVT) 5 times at 4 week intervals from week 0 to week 16, then every 8 weeks until week 48.
Aflibercept	Aflibercept	Aflibercept 2.0mg will be received IVT once every 4 weeks for 5 consecutive times from week 0 to week 16, then once every 8 weeks till week 48.

Primary Outcome Measures

Name	Time	Method
Change from baseline in BCVA at Week 52	Baseline, week 52	BCVA=best-corrected visual acuity; Measurement of visual acuity with Early Treatment Diabetic Retinopathy Study (ETDRS) charts at a starting distance of 4 meters

Secondary Outcome Measures

Name	Time	Method
Proportion of patients with absence of subretinal fluid at Week 52	Baseline, week 52	Proportion of patients whose subretinal fluid are completely improved
Change from baseline in CST over time	Baseline, weeks 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48 and 52	The change of CST will be assessed from baseline to 52 weeks by every 4 week intervals
Proportion of patients with a >2-step or>3-step DRS worsening from baseline on ETDRS DRSS at Week 52	Baseline, week 52	DRSS=Diabetic Retinopathy Severity Scale
Proportion of patients who develop new PDR or high risk PDR at Week 52	Baseline, week 52	PDR=proliferative diabetic retinopathy
Presence of ADAs during the study relative to the presence of ADAs at baseline	Baseline, weeks 12, 24, 36 and 52	during the study
Average change in BCVA from baseline over the period week 40 through week 52	Baseline, weeks 40, 44, 48 and 52	For each subject, this endpoint is defined as the average of the changes from baseline to weeks 40, 44, 48 and 52
Proportion of patients avoiding a loss of >15, >10, >5, or >0 letters in BCVA from baseline at Week 52	Baseline, week 52	Proportion of patients of reducing 4 types of letter counting in BCVA, respectively
Proportion of patients with absence of intraretinal fluid at Week 52	Baseline, week 52	Proportion of patients whose intraretinal fluid are completely improved
Mean change from baseline in CST over a period of week 40 through week 52	Baseline, weeks 40, 44, 48 and 52.	CST=central subfield thickness
Change from baseline in BCVA over time	Baseline, weeks 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48 and 52	BCVA will be assessed at each visit
Proportion of patients gaining >15, >10, >5, or >0 letters in BCVA from baseline at Week 52	Baseline, week 52	Proportion of patients of gaining 4 types of letter counting in BCVA, respectively
Change from baseline in CST at Week 52	Baseline, week 52	CST=central subfield thickness
Proportion of patients with absence of intraretinal fluid and subretinal fluid at Week 52	Baseline, week 52	Proportion of patients whose intraretinal fluid and subretinal fluid are both completely improved
Incidence and severity of ocular adverse events and non-ocular adverse events	0~52 weeks	during the study
Plasma concentration of RC28-E over time	Baseline, weeks 16, 36 and 48	during the study

Trial Locations

Locations (1)

Peking Union Medical College Hospital; 🇨🇳 Beijing, Beijing, China