Please use this identifier to cite or link to this item:http://hdl.handle.net/20.500.12105/6539
Von Hippel-Lindau Protein Is Required for Optimal Alveolar Macrophage Terminal Differentiation, Self-Renewal, and Function
Izquierdo-Fernandez, Helena Maria CNIC | Brandi, Paola CNIC | Gomez, Manuel J CNIC | Conde-Garrosa, Ruth CNIC | Priego, Elena CNIC | Enamorado, Michel CNIC | Martinez-Cano, Sarai CNIC | Sanchez, Iris CNIC | Conejero, Laura CNIC | Jimenez-Carretero, Daniel CNIC | Martin-Puig, Silvia CNIC | Guilliams, Martin | Sancho, David CNIC
Cell Rep. 2018; 24(7):1738-1746
The rapid transit from hypoxia to normoxia in the lung that follows the first breath in newborn mice coincides with alveolar macrophage (AM) differentiation. However, whether sensing of oxygen affects AM maturation and function has not been previously explored. We have generated mice whose AMs show a deficient ability to sense oxygen after birth by deleting Vhl, a negative regulator of HIF transcription factors, in the CD11c compartment (CD11c Delta Vhl mice). VHL-deficient AMs show an immature-like phenotype and an impaired self-renewal capacity in vivo that persists upon culture ex vivo. VHL-deficient phenotype is intrinsic in AMs derived from monocyte precursors in mixed bone marrow chimeras. Moreover, unlike control Vhl(fl/fl), AMs from CD11c Delta Vhl mice do not reverse pulmonary alveolar proteinosis when transplanted into Csf2rb(-/)(-) mice, demonstrating that VHL contributes to AM-mediated surfactant clearance. Thus, our results suggest that optimal AM terminal differentiation, self-renewal, and homeostatic function requires their intact oxygen-sensing capacity.
TISSUE-RESIDENT MACROPHAGES | COLONY-STIMULATING FACTOR | GM-CSF | FETAL MONOCYTES | HYPOXIA | DEVELOP | LUNG | MICE | INFLAMMATION | HIF-1-ALPHA