RT Journal Article T1 Modulation of pulmonary fibrosis by pulmonary surfactant-associated phosphatidylethanolamine in vitro and in vivo A1 Tlatelpa Romero, Beatriz A1 Vázquez de Lara Cisneros, Luis G. A1 Cañadas Benito, Olga A1 Blanco Rivero, Amaya A1 Olmeda Lozano, Bárbara A1 Pérez Gil, Jesús A1 Mendoza Milla, Criselda A1 Martinez Vaquero, José Luis A1 Romero, Yair A1 Contreras Cruz, David Atahualpa A1 de la Rosa Paredes, René A1 Ruiz Salgado, Sinuhé A1 Berra Romani, Roberto A1 Collantes Gutiérrez, Alonso Antonio A1 Pérez Fernández, María Susana A1 Hernández Linares, María Guadalupe A1 Guerrero Luna, Gabriel AB Pulmonary fibrosis (PF) is characterized by excessive collagen deposition and impaired lung function. Pulmonary surfactant may modulate fibroblast activity and offer therapeutic benefits. We developed a natural porcine pulmonary surfactant (NPPS) enriched with 1,2-dipalmitoyl-rac-glycero-3-phosphatidylethanolamine (PE) and evaluated its biophysical and biological properties. Biophysical analysis showed that PE improved surfactant performance by increasing surface pressure and stability. In vitro, NPPS-PE reduced collagen expression and induced apoptosis in normal human lung fibroblasts; in addition, it decreased proliferation in fibroblasts stimulated with TGF-β. In vivo, NPPS-PE improved gas exchange and significantly reduced collagen deposition in bleomycin-treated mice. These findings suggest that NPPS-PE may be a promising therapeutic strategy for fibrosing lung diseases. PB MDPI SN 1661-6596 YR 2025 FD 2025-07 LK https://hdl.handle.net/20.500.14352/124300 UL https://hdl.handle.net/20.500.14352/124300 LA eng NO Tlatelpa-Romero, B.; Vázquez-de-Lara Cisneros, L.G.; Cañadas, O.; Blanco-Rivero, A.; Olmeda, B.; Pérez-Gil, J.; Mendoza-Milla, C.; Martinez-Vaquero, J.L.; Romero, Y.; Contreras-Cruz, D.A.; et al. Modulation of Pulmonary Fibrosis by Pulmonary Surfactant-Associated Phosphatidylethanolamine In Vitro and In Vivo. Int. J. Mol. Sci. 2025, 26, 7132. https://doi.org/10.3390/ijms26157132 NO Funding:Part of this work was funded by the Spanish Ministry of Science and Innovation (grant PID2021-124932OB-I00 to O.C., B.O., A.B.-R. and J.P.-G.). NO Ministerio de Ciencia e Innovación (España) DS Docta Complutense RD 30 dic 2025