Prospective, Randomized, Multicentre, Open-label, Phase II / III Study to Assess Efficacy and Safety of Ranibizumab 0.5 mg Intravitreal Injections Plus Panretinal Photocoagulation (PRP) Versus PRP in Monotherapy in the Treatment of Subjects With High Risk Proliferative Diabetic Retinopathy. (PROTEUS)

Prospective, Randomized, Multicentre, Open-label, Phase II / III Study to Assess Efficacy and Safety of Ranibizumab 0.5 mg Intravitreal Injections Plus Panretinal Photocoagulation (PRP) Versus PRP in Monotherapy in the Treatment of Subjects With High Risk Proliferative Diabetic Retinopathy. (PROTEUS)

This study is a prospective, randomized, multicentre, open label study that intents to compare the efficacy and safety of ranibizumab 0.5 mg Intravitreal (ITV) injections plus Panretinal Photocoagulation versus Panretinal Photocoagulation alone in the regression of the neovascularization area in patients with High Risk Proliferative Diabetic Retinopathy over a 12-month treatment period.

One of the major complications of the diabetes mellitus is Diabetic Retinopathy (DR), one of the leading causes of visual impairment in working age in industrialized countries. Longer diabetes duration and poor glycaemic and blood pressure control are strongly associated with Diabetic Retinopathy. The overall prevalence of any form of Diabetic Retinopathy is 34.4% and 6.96% corresponds to Proliferative Diabetic Retinopathy (PDR). Therefore, approximately 93 million people have Diabetic Retinopathy and 17 million of them have Proliferative Diabetic Retinopathy.

It has been shown that treatment with repeated injections of ranibizumab can improve visual acuity in patients with PDR. Further, , the standard PRP treatment of PDR remains unsatisfactory. The knowledge of the mechanisms of this retinal complication is incomplete and, therefore, efforts should be done to understand and characterize patients' eyes response to combined treatments.

Therefore, the purpose of this study is to compare the standard treatment for PDR (i.e. Panretinal Photocoagulation) with Panretinal Photocoagulation treatment combined with ITV injections of ranibizumab since it is expected that anti-vascular endothelial growth factor (VEGF) treatment with ITV injections will increase the rate of success of Panretinal Photocoagulation in regression of neovascularization with improved final visual acuity.

Study Overview

• Status: Completed
• Conditions: High Risk Proliferative Diabetic Retinopathy
• Intervention / Treatment: Procedure: Panretinal Photocoagulation (PRP); Drug: Intravitreous injection of ranibizumab

• Study Type: Interventional
• Enrollment (Anticipated): 94
• Phase: Phase 2; Phase 3

Contacts and Locations

Study Locations

• France
  • Dijon, France, 21033
    • Department of Ophthalmology, University Hospital, CHU Dijon
  • Paris, France, 75475
    • Department of Ophthalmology, Lariboisière Hospital
  • Paris, France, 75571
    • Centre d'Investigation Clinique - Centre National d'Ophtalmologie des Quinze-Vingts
• Italy
  • Milan, Italy, 20132
    • Department of Ophthalmology, University Vita Salute - Scientific Institute of San Raffael
  • Padova, Italy, 35128
    • Centre for Clinical Trials, Department of Ophthalmology, University of Padova
  • Rome, Italy, 00198
    • G.B.Bietti Eye Foundation - IRCCS
• Portugal
  • Coimbra, Portugal, 3030-163
    • Espaco Medico de Coimbra
  • Coimbra, Portugal, 3000-548
    • Centre for Clinical Trials - Association for Innovation and Biomedical Research on Light and Image
  • Lisboa, Portugal, 1050-085
    • Instituto de Retina de Lisboa
  • Vila Franca de Xira, Portugal, 2600-009
    • Serviço de Oftalmologia,Hospital de Vila Franca de Xira
• United Kingdom
  • Frimley, United Kingdom, GU16 7UJ
    • Ophthalmology Clinical Trials Unit Frimley Park Hospital Foundation Trust
  • Gloucestershire, United Kingdom, GL53 7PX
    • Clinical Trial Unit, Dep. Ophth., Gloucestershire Hospitals NHS Foundation Trust
  • London, United Kingdom, SE5 9RS
    • Laser and Retinal Research Unit, King's Health Partners

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• High-risk proliferative diabetic retinopathy (HR-PDR); Neovascularization in the disc (NVD) ≥ 1/4 disc area (DA) OR Neovascularization elsewhere (NVE) ≥ 1/2 DA; NVE < 1/2 DA + vitreous and/or pre-retinal haemorrhage and/or rubeosis; NVD <1/4 DA + vitreous and/or pre-retinal haemorrhage and/or rubeosis;
• BCVA at baseline ≥ 24 Early Treatment Diabetic Retinopathy Study (ETDRS) letters score (approximate Snellen equivalent 20/320);
• Type I or Type II diabetic subjects of either gender;
• Age ≥ 18 years;
• Ability to provide written informed consent;
• Ability to return for all clinical trial visits;

Exclusion Criteria:

• Any intraocular surgery within 6 months before trial enrolment, including:

Prior scatter (panretinal) or focal/grid photocoagulation; Eyes who have received yttrium aluminum garnet (YAG) laser, or peripheral retinal cryoablation, or laser retinopexy (for retinal tears only);

• Fibrovascular proliferation with retinal traction;
• Other cause of retinal NV (retinal vein occlusion, radiation retinopathy or others);
• Atrophy/scarring/fibrosis/ hard exudates involving the centre of the macula;
• Significant media opacities or inadequate pupillary dilation, which might interfere with visual acuity, assessment of toxicity or fundus photography;
• Any likelihood that the subject will require cataract surgery within the following 1 year;
• Diabetic macular edema (DME) with central involvement, i.e., central macular thickness (Central Point Thickness) > 300 µm (Stratus OCT) equivalent values measured by spectral domain (SD)-OCT, adjusted according to the SD-OCT machine used;
• Previous vitrectomy;
• Intraocular pressure > 21 mmHg;
• Previous anti-VEGF therapy within the last 3 months;
• Known serious allergies or history of hypersensitivity to fluorescein used in angiography, or to components of Lucentis® formulation;
• Acute ocular or periocular infection;
• Previous filtering surgery (e.g., trabeculectomy) or placement of a glaucoma drainage device (e.g., tube-shunt surgery); General Exclusion Criteria
• Systolic BP > 170 mmHg or diastolic BP > 100 mmHg;
• HbA1C level >11% or recent signs of uncontrolled diabetes;
• Any of the following underlying systemic diseases:

History or evidence of severe cardiac disease, e.g. New York Heart Association (NYHA) Functional Class III or IV, clinical or medical history of unstable angina, acute coronary syndrome, myocardial infarction, or revascularization procedure within 6 months prior to baseline, or ventricular tachyarrhythmia requiring treatment; History or evidence of clinically significant peripheral vascular disease such as intermittent claudication or prior amputation; Renal failure requiring dialysis or renal transplant or renal insufficiency with creatinine levels > 2.0 mg/dl at screening; Stroke (within 12 months of trial entry); Any major surgical procedure within one month before trial enrolment;

• Subject with a condition (such as advanced, severe or unstable disease or its treatment) or is in a situation which may put him/her at significant risk, which may confound the study results or may interfere significantly with the subject's participation in the study;
• Previous radiation to the head in the region of the study eye;
• Use of any other investigational drugs within the last 3 months (for DR or other condition);
• History of malignancy of any organ system (other than localized basal cell carcinoma of the skin), treated or untreated, within the past 5 years, regardless of whether there is evidence of local recurrence or metastases;
• Pregnant or nursing (lactating) women, where pregnancy is defined as the state of a female after conception and until the termination of gestation.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Ranimizumab + Panretinal photocoagulation (PRP); 3 Intravitreous injections of ranibizumab combined with standard PRP (2 ± 1 weeks after injection), at month-0, month-1 and month-2 that can be repeated after month-3, with always at least 1 month of interval between injections.	Procedure: Panretinal Photocoagulation (PRP); Drug: Intravitreous injection of ranibizumab
Active Comparator: Panretinal photocoagulation (PRP); Panretinal photocoagulation treatment (PRP) between month-0 and month-2, with 1 mandatory laser session in month-0 and more laser sessions as needed until Month-2 to complete the PRP treatment. After completing the PRP treatment, PRP sessions can be repeated from Month-3 to Month-11.	Procedure: Panretinal Photocoagulation (PRP)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Regression of neovascularization	Defined as any decrease in the area of neovascularization	12-month treatment

Secondary Outcome Measures

Outcome Measure	Time Frame
Changes in Best Corrected Visual Acuity (BCVA)	12-Month treatment
Time to complete neovascularization regression	12-Month treatment
Recurrence of neovascularization	12-Month treatment
Macular retinal thickness	12-Month treatment
Need of treatment for Diabetic Macular Edema	12-Month treatment
Need of vitrectomy due to the occurrence of vitreous hemorrhage, tractional retinal detachment or other complications of Diabetic Retinopathy.	12-Month treatment
Adverse events related to the treatments	12-Month treatment

Collaborators and Investigators

• Sponsor: Association for Innovation and Biomedical Research on Light and Image
• Collaborators: European Vision Institute Clinical Research Network
• Investigators: Study Chair: José Cunha-Vaz, MD, PhD, Association of Innovation and Biomedical Research on Light and Image

Study record dates

Study Major Dates

• Study Start (Actual): April 1, 2014
• Primary Completion (Actual): April 1, 2016
• Study Completion (Actual): October 1, 2017

Study Registration Dates

• First Submitted: September 10, 2013
• First Submitted That Met QC Criteria: September 12, 2013
• First Posted (Estimate): September 13, 2013

Study Record Updates

• Last Update Posted (Actual): May 14, 2018
• Last Update Submitted That Met QC Criteria: May 11, 2018
• Last Verified: May 1, 2018

More Information

Terms related to this study

• Keywords: Diabetes; Ranibizumab; Panretinal Photocoagulation; Proliferative Retinopathy
• Additional Relevant MeSH Terms: Cardiovascular Diseases; Vascular Diseases; Eye Diseases; Endocrine System Diseases; Diabetic Angiopathies; Diabetes Complications; Diabetes Mellitus; Retinal Diseases; Diabetic Retinopathy; Physiological Effects of Drugs; Antineoplastic Agents; Angiogenesis Inhibitors; Angiogenesis Modulating Agents; Growth Substances; Growth Inhibitors; Ranibizumab
• Other Study ID Numbers: ECR-RET-2013-05