How the protein FSTL-1 helps lungs fight antibiotic-resistant pneumonia

Follistatin-like 1 Mediated Host Defense in Bacterial Pneumonia

NIH-funded research University of Pittsburgh at Pittsburgh · NIH-11132631

This work looks at whether a protein called FSTL-1 can help lungs recruit immune cells and kill antibiotic-resistant bacteria in people with pneumonia.

Quick facts

Grant typeR01 grant
Study typeNIH-funded research
Funding institutionUniversity of Pittsburgh at Pittsburgh NIH-funded
Lab location1 site (Pittsburgh, United States)
Project IDNIH-11132631 on NIH RePORTER

What this research studies

This project studies a protein called FSTL-1 that researchers think helps the lungs fight bacterial pneumonia. Using lab and preclinical models of Klebsiella pneumoniae infection, scientists will study how FSTL-1 binds to CD14 and controls recruitment of neutrophils, a key white blood cell. They will also test whether FSTL-1 helps neutrophils kill bacteria through a pathway involving the nuclear receptor NR4A1. The results could point to new host-directed treatments to help people clear antibiotic-resistant lung infections.

Who could benefit from this research

Good fit: People with bacterial pneumonia—especially those with antibiotic-resistant Klebsiella infections or recurrent severe lung infections—would be most likely to benefit from future treatments based on this work.

Not a fit: People with viral pneumonia, noninfectious lung disease, or mild self-resolving infections are unlikely to benefit directly from this preclinical project.

Why it matters

Potential benefit: If successful, this work could identify new immune-based strategies to help patients clear antibiotic-resistant pneumonia.

How similar studies have performed: While immune modulation has transformed cancer and autoimmune care, host-directed immunotherapies for bacterial pneumonia are largely novel and early-stage.

Where this research is happening

Pittsburgh, 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 2026-06-13 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.