Identification of a proximal progenitor population from murine fetal lungs with clonogenic and multilineage...

Area of Science:

• Developmental Biology
• Stem Cell Biology
• Pediatric Pulmonology

Background:

• Lung development-associated diseases significantly impact preterm infants and children.
• Understanding the molecular basis of these diseases requires access to lung progenitor/stem cell populations.
• Identifying these cells is crucial for developing effective treatments and interventions.

Purpose of the Study:

• To identify and isolate fetal lung epithelial progenitor cells.
• To characterize the self-renewal, expansion, and differentiation capabilities of these progenitor cells.
• To establish a model system for studying pulmonary development and associated pediatric diseases.

Main Methods:

• Utilized a Nkx2-1(mCherry) reporter mouse model.
• Isolated Nkx2-1-expressing lung progenitor cells from the proximal lung epithelium during fetal development.
• Cultured cells in semisolid media to form clonal spheres and assessed their in vitro behavior and differentiation potential.

Main Results:

• Successfully identified and captured Nkx2-1-expressing fetal lung progenitor cells.
• Demonstrated that these cells possess self-renewal and expansion capabilities over multiple passages in vitro.
• Showed that in-vitro-derived spheres differentiated into a polarized epithelium, including basal and secretory cells, capable of repopulating decellularized lung scaffolds.

Conclusions:

• Nkx2-1 expression defines a fetal lung epithelial progenitor cell population.
• These progenitor cells serve as a valuable in vitro model system for studying pulmonary development.
• This model system holds promise for advancing research into pediatric lung diseases.