What this study is
This study is open to adults with diabetic retinopathy. People who have non-proliferative diabetic retinopathy of moderate or high severity can join the study.
The purpose of this study is to find out whether a medicine called BI 764524 helps people with diabetic retinopathy. The study also aims to find a suitable treatment plan for BI 764524. Participants are put into 5 groups by chance. Participants in groups 1, 2, and 3 get BI 764524. Over 1 year, they get a different number of injections of the same dose of BI 764524 injected into 1 eye. During some visits, participants may get a sham control, which is done like an eye injection but without a needle, so that participants will not know how many injections of BI 764524 they received. Participants in group 4 only get a sham control. Participants in group 5 (only in the USA) get aflibercept or sham injections during some visits. Aflibercept is a medicine already used to treat diabetic retinopathy.
Participants are in the study for one and a half years. During this time, they visit the study site at least 16 times. During this time, doctors regularly do eye exams and visual tests to assess the severity of participants' eye condition. After 1 year of treatment, researchers look at the number of participants with eye improvements. To do so, they compare eye damage and certain severe eye problems between the groups of participants. The doctors also regularly check participants' health and take note of any unwanted effects.
What's being tested
- BI 764524
Intervention · DRUG
BI 764524
- Sham comparator to BI 764524
Intervention · DRUG
Sham comparator to BI 764524
- Aflibercept (Eylea®) - US only
Intervention · DRUG
Aflibercept (Eylea®) - US only
Study details
- Official title
- CRIMSON: A Multicentre, Randomised, Sham-controlled (and Active Controlled in the USA), Double-masked, 72-week Trial to Study the Safety, Tolerability, Pharmacokinetics, and Efficacy of 3 Dosing Regimens of Intravitreal BI 764524 in Patients With Moderate to Severe Non-proliferative Diabetic Retinopathy
- Sponsor
- Boehringer Ingelheim
- Conditions
- Diabetic Retinopathy
- Enrolling
- 175 people
- Starts
- 2024-05-15
- Est. completion
- 2027-08-20
- Design
- Quadruple-blind, randomized, parallel groups, Phase 2
- Record
- View on ClinicalTrials.gov ↗
Who can join
Age 18 Years and overSex ALLHealthy volunteers Not acceptedYou may qualify if
- Diagnosis of diabetes mellitus (DM) under regular treatment with Haemoglobin A1c (HbA1c) (glycated haemoglobin) (HbA1c) <12%; DM should be under regular investigation by a trained specialist as per local standard of care prior to and during the trial
- Age ≥18 years at time of signing Informed Consent Form (ICF)
- Study eye
- Moderate to severe non-proliferative diabetic retinopathy (NPDR) (Diabetic Retinopathy Severity Scale (DRSS) level 43 to 53) as assessed by Ultra-widefield colour fundus photography (UWF-CFP) images (within the 7-field grid) and confirmed by the central reading centre (CRC) at screening. Patient staged at DRSS level of 43 based on UWF-CFP images can be included only if:; They are participating in the standard 7-field CFP sub-study of the trial, and; They are staged as DRSS level of 47 to 53 on standard 7-field CFP imaging, as confirmed by the CRC at screening.
- Ultra-widefield fluorescein angiography (UWF-FA) image gradable for presence of retinal non-perfusion (RNP) as confirmed by the CRC at screening
- Visual acuity: best corrected visual acuity (BCVA) letter score of ≥49 letters (approximate Snellen equivalent of 20/100 or better) using ETDRS chart at starting distance of 4 meter (m) at screening and reconfirmed at baseline
- Sufficiently clear ocular media, adequate pupillary dilation, and fixation to permit quality fundus imaging
You can't join if
- Evidence of active retinal neovascularisation (NV) on clinical exam and/or UWF-CFP images within the 7-field grid, confirmed by the CRC grading. The following are permitted if, based on the assessment of the investigator, do not require acute treatment:; Small neovascular lesions within the ETDRS 7-field that are detected only on UWF-FA, but not on clinical exam or UWF-CFP; Neovascularisations outside of the ETDRS 7-field on ultra-widefield imaging; Evidence of active NV of the iris (small iris tufts are not an exclusion) or in the anterior chamber angle; Prior pan-retinal photocoagulation (PRP). Peripheral scatter or targeted laser treatment in up to 1 quadrant outside the ETDRS 7-field area is permitted if it was performed at least 6 months prior to Day 1; CI-DME, defined as central subfield thickness (CST) ≥320 micrometer (μm) as measured by Heidelberg Spectralis optical coherence tomography (OCT) and confirmed by central reading centre (CRC) at screening (equivalent measurements from other OCT machines may be accepted); participants with a CST of 320-330 μm can be included if, in the opinion of the investigator, the participant is not expected to require treatment for CI-DME during the duration of the study (e.g. no profound impact on BCVA, stable CST, etc.). CST must be re-confirmed at baseline. A CRC confirmation of the baseline CST is not required.; Previous treatment in the study eye for NPDR and/or diabetic macular edema (DME) with intravitreal (IVT) anti-vascular endothelial growth factor (VEGF) (including anti-VEGF/Ang2) or short acting corticosteroid drugs (e.g. triamcinolone) within 6 months prior to Day 1 or >4 treatments within the last 18 months (referred to elsewhere as 'previous IVT treatment').; Any previous IVT treatment other than anti-VEGF and short-acting steroids. Previous dexamethasone IVT drug delivery system (Ozurdex) or fluocinolone acetonide intravitreal implant (Iluvien) is not allowed; Refractive error of more than -8 dioptres of myopia (spherical equivalent) in the study eye. For patients having undergone refractive or cataract surgery in the study eye, either the pre-operative refractive error or the axial length measurement should be used, at the investigator's discretion. Axial length should be less than 26 mm; Any concurrent or past ocular condition in the study eye which, in the judgement of the investigator, could:; Require medical or surgical intervention during the study period to prevent or treat vision loss (e.g. advanced cataract, history of retinal detachment or macular hole (Stage 3 or 4) in the study eye); Could likely contribute to a significant loss of BCVA during the study period if left untreated (e.g. advanced epiretinal membrane and/or vitreomacular traction, active or history of optic neuritis in either eye); Contraindicate the use of the investigational drug, or may render the patient at high risk for treatment complications (e.g. active infectious or non-infectious conjunctivitis/keratitis in either eye; history of recurrent infectious or inflammatory ocular disease in either eye (e.g. uveitis); May affect interpretation of the study results (e.g. central atrophy of the retinal pigment epithelium or photoreceptors; age-related macular degeneration, hereditary retinal degenerative diseases, myopic macular degeneration, past, current or planned use of medications known to be toxic to the retina, lens or optic nerve (e.g. deferoxamine, chloroquine/hydroxychloroquine, chlorpromazine, phenothiazines, tamoxifen, nicotinic acid, and ethambutol); history of central serous chorioretinopathy, ischemic optic neuropathy or retinal vascular occlusion
Sign in and we'll check these against your records.Full criteria on ClinicalTrials.gov ↗
Loading treatment details…
Study locations (90)
2 openContact for every open site
- Boehringer Ingelheim · Contact833-602-2368unitedstates@bitrialsupport.com
Florida Retina Institute
Jacksonville, Florida, United States
RecruitingRetina Associates of Utah
Salt Lake City, Utah, United States
RecruitingAssociated Retina Consultants, Ltd.
Phoenix, Arizona, United States
Active, not recruitingCalifornia Retina Consultants-Bakersfield-65523
Bakersfield, California, United States
Active, not recruitingRetina-Vitreous Associates Medical Group
Beverly Hills, California, United States
Active, not recruitingRetinal Diagnostic Center
Campbell, California, United States
CompletedThe Retina Partners
Encino, California, United States
Active, not recruitingLugene Eye Institute
Glendale, California, United States
Active, not recruitingRetina Associates of Southern California
Huntington Beach, California, United States
Active, not recruitingByers Eye Institute
Palo Alto, California, United States
CompletedCalifornia Eye Specialists Medical Group Inc
Pasadena, California, United States
Active, not recruitingRetinal Consultants Medical Group
Sacramento, California, United States
Active, not recruitingRetinal Consultants Medical Group
Sacramento, California, United States
Active, not recruitingCalifornia Retina Consultants-Santa Maria-65510
Santa Maria, California, United States
Active, not recruitingBay Area Retina Associates - Walnut Creek
Walnut Creek, California, United States
Active, not recruitingColorado Retina Associates
Lakewood, Colorado, United States
Active, not recruitingRetina Group of New England, PC
Waterford, Connecticut, United States
CompletedFlorida Retina Consultants
Lakeland, Florida, United States
Active, not recruitingEast Florida Eye Institute
Stuart, Florida, United States
Active, not recruitingCenter for Retina and Macular Disease
Winter Haven, Florida, United States
Active, not recruitingRetina Consultants Of Hawaii
‘Aiea, Hawaii, United States
Active, not recruitingMaine Eye Center
Portland, Maine, United States
Active, not recruitingCumberland Valley Retina Consultants
Hagerstown, Maryland, United States
Active, not recruitingDeep Blue Retina Clinical Research PLLC
Southaven, Mississippi, United States
Active, not recruitingNJRetina
Teaneck, New Jersey, United States
Active, not recruitingLong Island Vitreoretinal Consultants
Great Neck, New York, United States
CompletedRetina Vitreous Surgeons of Central NY, PC
Liverpool, New York, United States
Active, not recruitingUniversity Hospitals Cleveland Medical Center
Cleveland, Ohio, United States
Active, not recruitingEyeHealth Northwest
Portland, Oregon, United States
CompletedCharleston Neuroscience Institute - Ladson
Ladson, South Carolina, United States
CompletedTennessee Retina
Nashville, Tennessee, United States
Active, not recruitingAustin Retina Associates
Austin, Texas, United States
Active, not recruitingRetina Research Center, PLLC
Austin, Texas, United States
Active, not recruitingAustin Clinical Research, LLC
Austin, Texas, United States
Active, not recruitingRetina Consultants of Texas
Katy, Texas, United States
Active, not recruitingValley Retina Institute, PA
McAllen, Texas, United States
CompletedAustin Retina Associates
Round Rock, Texas, United States
CompletedMedical Center Ophthalmology Associates
San Antonio, Texas, United States
Active, not recruitingRetina Consultants of Texas
San Antonio, Texas, United States
Active, not recruitingRetina Consultants of Texas - Schertz
Schertz, Texas, United States
Completed
50 sites outside the US
Universitätsklinikum Bonn AöR
Bonn, Germany
CompletedUniversitätsmedizin der Johannes Gutenberg-Universität Mainz
Mainz, Germany
Active, not recruitingDiakonie Klinikum Dietrich Bonhoeffer GmbH
Neubrandenburg, Germany
CompletedUniversitätsklinikum Tübingen
Tübingen, Germany
CompletedUniversitätsklinikum Ulm
Ulm, Germany
CompletedSemmelweis University
Budapest, Hungary
CompletedBudapest Retina Associations Kft.
Budapest, Hungary
Active, not recruitingJahn Ferenc Del-Pest Hospital
Budapest, Hungary
CompletedUniversity Debrecen Hospital
Debrecen, Hungary
CompletedNozologen Kft.
Pécs, Hungary
Active, not recruitingZala Megyei Szent Rafael Korhaz
Zala, Hungary
Active, not recruitingAzienda Ospedaliero Universitaria Careggi
Florence, Italy
Active, not recruitingFondazione IRCCS Ca'Granda-Ospedale Maggiore Policlinico
Milan, Italy
Active, not recruitingOspedale San Raffaele S.r.l.
Milan, Italy
CompletedAzienda Ospedaliera Universitaria "Federico II"
Naples, Italy
Active, not recruitingIRCCS Fondazione Bietti
Roma, Italy
CompletedIstituto Clinico Humanitas
Rozzano, Italy
Active, not recruitingOspedali Riuniti di Ancona
Torrette Di Ancona, Italy
Active, not recruitingAkita University Hospital
Akita, Japan
CompletedHyogo Prefectural Amagasaki General Medical Center
Amagasaki-shi, Japan
Active, not recruitingHayashi Eye Hospital
Fukuoka, Japan
Active, not recruitingFukushima Medical University Hospital
Fukushima, Japan
Active, not recruitingTokyo Medical University Hachioji Medical Center
Hachioji-shi, Japan
Active, not recruitingKagawa University Hospital
Kagawa, Kita-gun, Japan
CompletedKagoshima University Hospital
Kagoshima, Japan
CompletedNara Medical University Hospital
Kashihara, Japan
CompletedKobe University Hospital
Kobe, Japan
CompletedShinshu University Hospital
Matsumoto-shi, Japan
Active, not recruitingNational Hospital Organization Tokyo Medical Center
Meguro-ku, Japan
Active, not recruitingAichi Medical University Hospital
Nagakute, Japan
CompletedHyogo College of Medicine Hospital
Nishinomiya, Japan
Active, not recruitingJuntendo University Hospital
Tokyo, Japan
Active, not recruitingKlinika Okulistyczna
Bydgoszcz, Poland
CompletedCentrum Diagnostyki i Mikrochirurgii Oka-Lens Sp. z o.o.
Olsztyn, Poland
Active, not recruitingWarsaw Ophthalmology Hospital
Warsaw, Poland
Active, not recruitingCentrum Medyczne Piasta 47 sp. z o.o.
Wałbrzych, Poland
Completed4. Military Clinical Hospital with Polyclinic SP ZOZ
Wroclaw, Poland
CompletedEmanuelli Research & Development Center
Arecibo, Puerto Rico
Active, not recruitingHospital Universitari de Bellvitge
Barcelon, Spain
CompletedHospital Clínico San Carlos
Madrid, Spain
CompletedHospital Universitario 12 de Octubre
Madrid, Spain
Active, not recruitingHospital Universitari General de Catalunya
Sant Cugat Del Vallés, Spain
Active, not recruitingHospital General Universitario de Valencia
Valencia, Spain
Active, not recruitingColchester Hospital
Colchester, United Kingdom
CompletedRoyal Liverpool University Hospital
Liverpool, United Kingdom
Active, not recruitingMoorfields Eye Hospital
London, United Kingdom
Active, not recruitingWestern Eye Hospital
London, United Kingdom
Active, not recruitingKing's College Hospital
London, United Kingdom
CompletedCentral Middlesex Hospital
London, United Kingdom
Active, not recruitingRoyal Victoria Infirmary
Newcastle upon Tyne, United Kingdom
Active, not recruiting
Study team
Sponsor
Boehringer Ingelheim
Study ID 1436-0007
Frequently asked questions
The sponsor hasn't published answers to common questions for this trial.