Understanding the blood-olfactory barrier and its role in smell loss

Defining the molecular and anatomical basis of the blood-olfactory barrier (BOB)

NIH-funded research Duke University · NIH-10723087

This study is looking at a special barrier in the body that helps protect our sense of smell by keeping certain proteins in the blood from reaching the smell tissues, and it aims to understand how this barrier works and how it might be affected by infections like COVID-19, which could help people who have lost their sense of smell.

Quick facts

Grant typeR21 grant
Study typeNIH-funded research
Funding institutionDuke University NIH-funded
Lab location1 site (Durham, United States)
Project IDNIH-10723087 on NIH RePORTER

What this research studies

This research investigates the blood-olfactory barrier (BOB), a specialized structure that prevents certain proteins in the blood from reaching the olfactory tissues responsible for smell. By studying how this barrier functions from development through adulthood, the research aims to uncover its role in olfactory health and disease. The approach includes examining the cellular and molecular components of the BOB and how it interacts with pathogens, particularly in the context of infections like COVID-19. Patients may benefit from insights into how olfactory loss occurs and potential therapeutic targets for restoring smell.

Who could benefit from this research

Good fit: Ideal candidates for this research are adults experiencing loss of smell or anosmia, particularly those affected by viral infections.

Not a fit: Patients with olfactory function intact or those with non-viral causes of anosmia may not benefit from this research.

Why it matters

Potential benefit: If successful, this research could lead to new treatments for anosmia and improve our understanding of upper airway immunity.

How similar studies have performed: While the concept of the blood-olfactory barrier is relatively novel, similar research on blood-brain and blood-retinal barriers has shown promising results.

Where this research is happening

Durham, 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.
Last reviewed 2026-06-10 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.