Svep1 orchestrates distal airway patterning and alveolar differentiation in murine lung development
Disruptions in airway branching or alveolar differentiation during lung development can lead to severe respiratory deficiencies and neonatal death. The molecular mechanisms governing branching patterning and early alveolar formation remain elusive. Loss of Svep1 function in mice results in various developmental defects, including lung hypoplasia and perinatal lethality. Our examination of the…
Svep1 plays a crucial role in the development of the lungs in mice, orchestrating the patterning of the distal airways and the differentiation of alveoli. Disruptions in these processes can lead to significant respiratory issues and even neonatal death. Svep1 loss in mice causes various developmental defects, including lung hypoplasia and perinatal lethality.
Through in vivo and in vitro examination of Svep1 knockout (Svep1 -/-) mouse embryos, researchers observed an increase in disorganized distal airway tips, greater disruption of lung lobe morphology over time, and disrupted saccular development in Svep1 mutants. Svep1 interacts with FGF signaling to regulate smooth muscle differentiation and, along with Fgf9, guides airway branching patterning.
Transcriptomic analysis of Svep1 -/- embryos' lungs revealed dysregulated gene expression affecting saccular maturation. The findings highlight Svep1 as a key extracellular matrix player that shapes airway morphology and influences alveolar fate, offering potential therapeutic avenues for congenital lung disorders.
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