Tiespectus + Aflibercept for Age-Related Macular Degeneration
(MALBEC Trial)
What You Need to Know Before You Apply
What is the purpose of this trial?
This trial tests a new medicine, tiespectus, to determine its effectiveness in treating neovascular age-related macular degeneration (NVAMD), a serious eye condition that can lead to vision loss. Researchers aim to compare tiespectus with aflibercept, a current standard treatment. Participants will receive either a low or high dose of tiespectus or the usual treatment with aflibercept. Ideal candidates for this trial are those recently diagnosed with NVAMD who have not yet received treatment. As a combined Phase 2 and Phase 3 trial, this study evaluates tiespectus in a smaller group and represents the final step before FDA approval, offering participants a chance to contribute to advancing treatment options.
Do I have to stop taking my current medications for the trial?
The trial information does not specify if you need to stop taking your current medications. However, it does mention that participants should not have received certain eye treatments before joining the study.
Is there any evidence suggesting that this trial's treatments are likely to be safe?
Research has shown that tiespectus, the medicine being tested, was well-tolerated in earlier studies. One study on macular edema reported no serious eye-related or overall health issues. Additionally, there were no dose-limiting toxicities, indicating that participants could safely receive the treatment without harm. This suggests that tiespectus has a good safety record so far. While this information is encouraging, further research is needed to confirm these findings for age-related macular degeneration treatments.12345
Why are researchers excited about this trial's treatments?
Researchers are excited about Tiespectus for age-related macular degeneration because it offers a potentially new mechanism of action compared to existing treatments. While standard treatments like Aflibercept primarily inhibit a protein called VEGF to reduce abnormal blood vessel growth in the eye, Tiespectus may work on different or additional pathways, potentially enhancing effectiveness or broadening the patient response. This trial is testing both low and high doses of Tiespectus, which could lead to more tailored treatment options for patients, depending on their individual needs.
What evidence suggests that this trial's treatments could be effective for NVAMD?
Research has shown that tiespectus may help treat eye conditions like macular edema, which resembles NVAMD. In earlier studies, tiespectus improved vision and reduced retinal swelling, both crucial for eye health. Tiespectus targets two key areas: it activates a protein that maintains healthy blood vessels and blocks signals that cause abnormal blood vessel growth. This dual action may help prevent vision loss and improve symptoms. In this trial, participants will receive either a low or high dose of tiespectus, or aflibercept as a comparator. While more research is needed to confirm its effectiveness for NVAMD specifically, these early results are promising.12678
Who Is on the Research Team?
Medical Director
Principal Investigator
Merck Sharp & Dohme LLC
Are You a Good Fit for This Trial?
This trial is for people recently diagnosed (within the last 21 days) with a specific type of age-related macular degeneration that causes abnormal blood vessels in the eye. Participants must not have received prior treatment for this condition in the study eye.Inclusion Criteria
Timeline for a Trial Participant
Screening
Participants are screened for eligibility to participate in the trial
Treatment
Participants receive 3 initial administrations of tiespectus or aflibercept every 4 weeks, then continue every 8 weeks until week 48
Extended Treatment
Participants continue treatment based on individualized response up to week 92
Follow-up
Participants are monitored for safety and effectiveness after treatment
What Are the Treatments Tested in This Trial?
Interventions
- Tiespectus
Trial Overview
The study compares a new medicine called tiespectus (MK-8748/EYE201) to aflibercept, an existing standard treatment, to see if tiespectus works as well for treating neovascular age-related macular degeneration. Participants are randomly assigned to one of these treatments.
How Is the Trial Designed?
3
Treatment groups
Experimental Treatment
Active Control
Participants receive 3 initial administrations of tiespectus low dose every 4 weeks (Q4W), then continue to receive tiespectus low dose every 8 weeks (Q8W) until week 48. After week 48, participants will be treated at intervals determined based on individualized response to treatment, up to week 92.
Participants receive 3 initial administrations of tiespectus high dose Q4W, then continue to receive tiespectus high dose Q8W until week 48. After week 48, participants will be treated at intervals determined based on individualized response to treatment, up to week 92
Participants receive 3 initial administrations of aflibercept, then continue to receive aflibercept Q8W until week 92
Find a Clinic Near You
Who Is Running the Clinical Trial?
EyeBiotech Ltd.
Lead Sponsor
Citations
Tiespectus Improves Vision and Retinal Thickness in BRVO
Mean change in best-corrected visual acuity from baseline in the phase 1/2a RIOJA trial of Tiespectus for macular edema secondary to branch ...
Merck Announces Initiation of Pivotal Phase 2b/3 Trial ...
“Despite available therapies, many patients with neovascular age-related macular degeneration remain at risk of further vision loss due to ...
NCT07440225 | A Clinical Trial of EYE201/MK-8748 in ...
These data include demographics, such as age, sex/gender, race and ethnicity, and study-specific measures (for example, systolic blood pressure, prior ...
4.
finance.yahoo.com
finance.yahoo.com/sectors/healthcare/articles/merck-announces-initiation-pivotal-phase-105000556.htmlMerck Announces Initiation of Pivotal Phase 2b/3 Trial ...
Merck Announces Initiation of Pivotal Phase 2b/3 Trial Evaluating MK-8748 (Tiespectus), an Investigational Bispecific Tie2 Agonist/VEGF ...
NCT06664502 | A 2-part Study Consisting of a Multiple ...
These data include demographics, such as age, sex/gender, race and ethnicity, and study-specific measures (for example, systolic blood pressure, prior ...
6.
ophthalmologytimes.com
ophthalmologytimes.com/view/merck-launches-phase-2b-3-malbec-trial-of-mk-8748-in-wet-amdMerck launches phase 2b/3 MALBEC trial of MK-8748 in ...
MALBEC (NCT07440225) is a randomized, double-masked trial evaluating the safety and efficacy of MK-8748 at 2 dose levels versus control ...
Merck Launches Phase 2b/3 Trial of MK-8748 for Wet AMD
“Despite available therapies, many patients with neovascular age-related macular degeneration remain at risk of further vision loss due to ...
8.
glance.eyesoneyecare.com
glance.eyesoneyecare.com/stories/2026-04-22/merck-kicks-off-phase-2b-3-trial-on-tri-specific-antibody-for-wet-amd/Merck kicks off phase 2b/3 trial on tri-specific antibody for ...
Merck & Co. recently announced the initiation of a pivotal phase 2b/3 trial evaluating MK-8748 (also known as TIESPECTUS, EYE201) for the ...
Unbiased Results
We believe in providing patients with all the options.
Your Data Stays Your Data
We only share your information with the clinical trials you're trying to access.
Verified Trials Only
All of our trials are run by licensed doctors, researchers, and healthcare companies.