Airway Progenitor Clone Formation Is Enhanced by Y-27632-Dependent Changes in the Transcriptome

Area of Science:

• Cell Biology
• Regenerative Medicine
• Pulmonary Research

Background:

• Primary airway epithelial cell cultures are crucial for lung disease research.
• Current culture methods have limitations in cell yield and progenitor cell maintenance.

Purpose of the Study:

• Adapt conditional reprogramming culture (CRC) for nasal airway epithelial cells.
• Evaluate CRC's growth advantages over standard methods.
• Determine the cellular and molecular mechanisms underlying CRC effects.

Main Methods:

• Applied CRC to primary nasal airway epithelial cells.
• Compared cell yield and progenitor cell frequency with standard bronchial epithelial growth media (BEGM).
• Utilized whole-transcriptome sequencing and Rho-kinase inhibitor Y-27632.

Main Results:

• CRC produced 7.1 × 10^10 cells after 4 passages, 379 times more than BEGM.
• CRC cultures showed higher progenitor cell frequency, dependent on Y-27632.
• Y-27632 altered gene expression related to cytoskeleton, cell junctions, and ECM interactions, upregulating basal cell genes and downregulating ECM remodeling proteases.

Conclusions:

• CRC significantly enhances nasal airway epithelial cell proliferation.
• Y-27632 is critical for preserving basal progenitor cells and enabling extensive cell amplification.
• CRC offers a scalable model for lung disease research.