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Intensive Glycemic Control Combined With Brolucizumab for Diabetic Macular Edema (iGLY-DME)

Efficacy Evaluation of Combined Intensive Glycemic Control in the Treatment of Diabetic Macular Edema: A Multicenter Randomized Controlled Trial

The purpose of this study is to learn whether tighter control of blood sugar, when combined with the drug brolucizumab, can help people with diabetic macular edema (DME) see better than standard blood sugar care combined with the same drug.

DME is a swelling in the back of the eye that can blur vision. It happens in some people with diabetes. Brolucizumab is an injection into the eye that treats this swelling. Many people improve with this injection, but some do not improve as much as hoped. Researchers think that keeping blood sugar closer to normal may help the eye injection work better.

This study will randomly assign participants to one of two groups. One group will receive intensive blood sugar management, which includes wearing a small sensor that checks sugar levels throughout the day and more frequent check-ins with a diabetes care team. The other group will receive standard blood sugar care. Both groups will receive brolucizumab eye injections on the same schedule.

Researchers will compare how much vision changes in each group over about 6 months. They will also check the amount of swelling in the eye and monitor safety.

This study is for adults with DME who are planning to start brolucizumab treatment. Participants will be in the study for about 6 months and will visit the clinic regularly for eye exams, injections, and blood tests.

Přehled studie

Postavení

Zatím nenabíráme

Podmínky

Intervence / Léčba

Detailní popis

Background and rationale. Diabetic macular edema (DME) is a leading cause of vision loss in diabetes, driven by hyperglycemia-induced blood-retinal barrier breakdown and VEGF-mediated vascular leakage. While intravitreal anti-VEGF therapy, including brolucizumab, is the current first-line treatment, a substantial proportion of patients show suboptimal anatomic or visual response, and elevated baseline HbA1c has been associated with reduced treatment response. This study is therefore designed to test the exploratory hypothesis that achieving intensive glycemic control, in addition to brolucizumab, may improve visual outcomes beyond standard glycemic care.

Study design. This is a multicenter, randomized, controlled, exploratory superiority trial with assessor masking. Participants are randomized 1:1, stratified by study site, to intensive glycemic management or standard glycemic care; both groups receive identical brolucizumab treatment. A total of 100 participants will be enrolled across 3-5 sites. The exploratory nature of the trial means that no formal significance threshold for superiority is prespecified; the primary analysis will report the between-group difference in BCVA change from baseline to week 24 with its 95% confidence interval and Cohen's d effect size, to inform the design of future confirmatory trials.

Intervention details. Brolucizumab is administered to both groups on the same schedule: three loading doses at weeks 0, 6, and 12, followed by PRN dosing based on prespecified retreatment criteria (vision loss ≥5 letters, CST increase ≥50 μm, or new IRF/SRF). Intensive glycemic management consists of structured endocrinology-led care using continuous glucose monitoring (CGM), with an individualized HbA1c target (generally <7.0%) and a time-in-range (TIR) goal of >70%, alongside a stepwise escalation protocol for participants not meeting glycemic targets. Standard care consists of routine diabetes education and HbA1c monitoring at ophthalmic visits, with a safety referral pathway for significant glycemic deterioration.

Analysis populations. The primary analysis will use the full analysis set (FAS) under the intention-to-treat principle. A per-protocol set (PPS) will be used for sensitivity analysis, and the safety set (SS) will include all participants receiving at least one dose of study treatment. The primary endpoint will be analyzed using a mixed-effects model with treatment group as a fixed factor, baseline BCVA as a covariate, and study site as a random effect.

Typ studie

Intervenční

Zápis (Odhadovaný)

100

Fáze

  • Nelze použít

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

18 let a starší (Dospělý, Starší dospělý)

Přijímá zdravé dobrovolníky

Ne

Pohlaví způsobilá ke studiu

Všechno

Popis

Inclusion Criteria:

Age ≥ 18 years.

Clinically diagnosed with type 1 or type 2 diabetes mellitus.

Study eye with diabetic macular edema (DME) confirmed by spectral-domain optical coherence tomography (SD-OCT), with edema involving the foveal center.

Study eye baseline best corrected visual acuity (BCVA) between 24 and 78 Early Treatment Diabetic Retinopathy Study (ETDRS) letters, inclusive.

Study eye baseline central subfield thickness (CST) ≥ 250 μm.

Treatment-naive DME, or no anti-VEGF treatment within 3 months and no local or systemic corticosteroid treatment within 6 months prior to enrollment; and no planned vitrectomy.

Planned to receive brolucizumab for DME after assessment and shared decision-making by the treating ophthalmologist prior to enrollment.

Exclusion Criteria:

Presence of other ocular diseases in the study eye that may significantly affect visual acuity or interfere with the assessment of macular edema (e.g., active age-related macular degeneration, retinal vein occlusion, glaucomatous optic neuropathy, high myopic choroidal neovascularization, prior macular hole, or epiretinal membrane involving the macula). Patients with severe proliferative diabetic retinopathy (PDR), high-risk PDR, or PDR stages V and VI.

Prior vitreoretinal surgery (e.g., vitrectomy).

Presence of severe systemic diseases that may interfere with study assessments or increase treatment risks, including but not limited to: poorly controlled heart failure (NYHA Class III-IV), myocardial infarction or unstable angina within the past 6 months, new or unstable stroke within 6 months, end-stage renal disease (e.g., requiring dialysis), hypertensive crisis, or active malignancy.

Pregnant or lactating women, or women of childbearing potential who plan to become pregnant during the study and are unwilling to use effective contraception.

Known hypersensitivity to brolucizumab or any of its excipients.

Prior retinal laser photocoagulation within 3 months before enrollment.

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Primární účel: Léčba
  • Přidělení: Randomizované
  • Intervenční model: Paralelní přiřazení
  • Maskování: Singl

Zbraně a zásahy

Skupina účastníků / Arm
Intervence / Léčba
Experimentální: Intensive Glycemic Management + Brolucizumab

Participants in this arm will receive intravitreal brolucizumab injections (three loading doses at weeks 0, 6, and 12, followed by pro re nata [PRN] dosing based on prespecified retreatment criteria). In addition, they will receive intensive glycemic management led by an endocrinology team. This includes the use of a continuous glucose monitoring (CGM) system, an individualized HbA1c target (generally <7.0%), a time-in-range (TIR) goal of >70%, and regular follow-up visits (telephone or outpatient) with diabetes specialists to optimize blood sugar control

A structured, endocrinology-led glycemic management strategy using continuous glucose monitoring (CGM). The intervention targets an individualized HbA1c level (generally <7.0%) and a time-in-range (TIR) of >70%. It includes regular follow-ups (telephone every 2 weeks and outpatient visits every 4 weeks) by a multidisciplinary team for medication adjustment and lifestyle counseling. A stepwise escalation protocol is applied if glycemic targets are not met or severe hypoglycemia occurs.

Intravitreal injection of brolucizumab administered on a fixed loading schedule of 3 doses at weeks 0, 6, and 12, followed by pro re nata (PRN) dosing. Retreatment criteria include a best-corrected visual acuity (BCVA) loss of ≥5 ETDRS letters from the best previous measurement, an increase in central subfield thickness (CST) of ≥50 μm, or the presence of new or worsening intraretinal fluid (IRF) or subretinal fluid (SRF).

Aktivní komparátor: Standard Glycemic Care + Brolucizumab

Participants in this arm will receive intravitreal brolucizumab injections on the same schedule as the other arm (three loading doses at weeks 0, 6, and 12, followed by PRN dosing). For glycemic management, they will receive standard diabetes care, which includes routine diabetes education and HbA1c monitoring at scheduled ophthalmic visits. If significant glycemic deterioration occurs, participants will be referred to endocrinology for safety management, but they will not receive the structured CGM-guided intensive protocol.

Intravitreal injection of brolucizumab administered on a fixed loading schedule of 3 doses at weeks 0, 6, and 12, followed by pro re nata (PRN) dosing. Retreatment criteria include a best-corrected visual acuity (BCVA) loss of ≥5 ETDRS letters from the best previous measurement, an increase in central subfield thickness (CST) of ≥50 μm, or the presence of new or worsening intraretinal fluid (IRF) or subretinal fluid (SRF).

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Change in Best Corrected Visual Acuity (BCVA) in the study eye
Časové okno: From baseline to Week 24

Change from baseline in BCVA measured as Early Treatment Diabetic Retinopathy Study (ETDRS) letter score in the study eye. This will be used for an exploratory superiority comparison between the two groups

From baseline to Week 24

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

Spolupracovníci

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia (Odhadovaný)

30. listopadu 2026

Primární dokončení (Odhadovaný)

31. května 2027

Dokončení studie (Odhadovaný)

31. října 2027

Termíny zápisu do studia

První předloženo

8. listopadu 2026

První předloženo, které splnilo kritéria kontroly kvality

8. listopadu 2026

První zveřejněno (Aktuální)

13. listopadu 2026

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

13. listopadu 2026

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

8. listopadu 2026

Naposledy ověřeno

1. listopadu 2026

Více informací

Termíny související s touto studií

Další identifikační čísla studie

  • KY-2026-164
  • K20260210 (Identifikátor registru: Ethics Committee)

Informace o lécích a zařízeních, studijní dokumenty

Studuje lékový produkt regulovaný americkým FDA

Ne

Studuje produkt zařízení regulovaný americkým úřadem FDA

Ne

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