Low-dose oral carbon monoxide for diabetic retinopathy

HBI-002 to Treat Diabetic Retinopathy

NIH-funded research Hillhurst Biopharmaceuticals, INC. · NIH-11192356

A low-dose oral carbon monoxide medicine aimed at protecting vision in adults with diabetic retinopathy.

Quick facts

Grant typeSbir 2 grant
Study typeNIH-funded research
Funding institutionHillhurst Biopharmaceuticals, INC. NIH-funded
Lab location1 site (Montrose, United States)
Project IDNIH-11192356 on NIH RePORTER

What this research studies

This project is developing HBI-002, an oral formulation that delivers low doses of carbon monoxide intended to protect retinal cells damaged by diabetes. Researchers will use translational animal models of diabetic retinopathy to study dosing, safety, and whether the drug can prevent or slow retinal injury. Earlier Phase 1 testing in healthy adults showed the oral product was tolerated and produced expected blood levels, and the current work will build on those findings. The goal is to generate the data needed to move HBI-002 into future clinical trials in people with diabetic eye disease.

Who could benefit from this research

Good fit: Adults with diabetes who have signs of diabetic retinopathy, especially those with early or progressive retinal damage, would be the likely candidates for future trials.

Not a fit: People without diabetic retinopathy or those with advanced, irreversible retinal scarring are unlikely to benefit from this treatment.

Why it matters

Potential benefit: If successful, this approach could slow or prevent vision loss from diabetic retinopathy with an easy-to-take oral medication.

How similar studies have performed: Preclinical animal studies have shown protective effects of low-dose carbon monoxide and multiple early human trials in other conditions have shown tolerable safety, but benefit in people with diabetic retinopathy has not yet been demonstrated.

Where this research is happening

Montrose, United States

Researchers

About this research

  1. This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
  2. Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
  3. For full project details, budget, and progress reports, visit the official NIH RePORTER page below.
Conditions Acute Respiratory Distress SyndromeAdult Respiratory Distress Syndrome
Last reviewed 2026-06-13 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.