isolation-of-lung-retinoid-containing-cells-by-cell-sorting

Isolation of Lung Retinoid-Containing Cells by Cell Sorting

Retinoids (vitamin A and its metabolites) are an essential lipid component of the alveolar microenvironment, and cell-type specific retinoid metabolism is ...

Rutgers, the State University of New Jersey

Rutgers Center for Lipid Research

Rutgers Center for Environmental Exposures & Disease

Retinoids are potent transcriptional regulators that act in regulating cell proliferation, differentiation, and other cellular processes. We carried out studies in male mice to establish the importance of local cellular retinoid stores within the lung alveolus for maintaining its health in the face of an acute inflammatory challenge induced by intranasal instillation of lipopolysaccharide. We also undertook single cell RNA sequencing and bioinformatic analyses to identify roles for different alveolar cell populations involved in mediating these retinoid-dependent responses. Here we show that local retinoid stores and uncompromised metabolism and signaling within the lung are required to lessen the severity of an acute inflammatory challenge. Unexpectedly, our data also establish that alveolar cells other than lipofibroblasts, specifically microvascular endothelial and alveolar epithelial cells, are able to take up lipoprotein-transported retinoid and to accumulate cellular retinoid stores that are directly used to respond to an acute inflammatory challenge.

Igor Shmarakov

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