Testing THN391 for Diabetic Macular Edema

A Phase 1b Open-Label, Multiple Ascending Dose Study of the Safety, Tolerability, and Biological Activity of Intravitreal THN391 in Diabetic Macular Oedema Secondary to Non-Proliferative Diabetic Retinopathy.

Phase 1 Interventional Therini Bio, Inc. · NCT06701721

This study is testing a new drug called THN391 to see if it can safely help people with diabetic macular edema caused by diabetes.

Quick facts

PhasePhase 1
Study typeInterventional
Enrollment21 (estimated)
Ages18 Years to 80 Years
SexAll
SponsorTherini Bio, Inc. Industry-sponsored
Locations2 sites (Parramatta, New South Wales and 1 other locations)
Trial IDNCT06701721 on ClinicalTrials.gov

What this trial studies

This study evaluates the safety and preliminary efficacy of THN391, administered as a monotherapy, in patients suffering from diabetic macular edema (DME) due to non-proliferative diabetic retinopathy. It is an open-label, multiple ascending dose study that will enroll approximately 21 participants across three sequential dose-escalating cohorts. Participants will receive three monthly administrations of THN391, allowing researchers to assess the drug's effects and safety profile.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 to 80 with a diagnosis of diabetic macular edema and vision loss in the study eye.

Not a fit: Patients who are pregnant, breastfeeding, or have had recent ocular surgery may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could improve vision and quality of life for patients with diabetic macular edema.

How similar studies have performed: While this approach is novel, similar studies targeting diabetic macular edema have shown promising results in the past.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Be willing and able to understand the study procedures and the risks involved and provide written informed consent before the first study-related activity
* 18 to 80 years of age (inclusive at the time of informed consent).
* Diagnosis of Diabetic Macular Edema (DME)
* Vision loss in the study eye

Exclusion Criteria:

* Be pregnant or breastfeeding
* Cataract surgery or any other previous ocular surgery in the study eye within 3 months before Screening
* Any other condition except for DME that could affect interpretation of study assessments

Where this trial is running

Parramatta, New South Wales and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Diabetic Macular EdemaDiabetic RetinopathyDiabetic Macular OedemaNon-proliferative Diabetic Retinopathy
Last reviewed 2026-06-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.