TY - JOUR
T1 - Lung emphysema and impaired macrophage elastase clearance in mucolipin 3 deficient mice
AU - Spix, Barbara
AU - Butz, Elisabeth S.
AU - Chen, Cheng-Chang
AU - Rosato, Anna Scotto
AU - Tang, Rachel
AU - Jeridi, Aicha
AU - Kudrina, Veronika
AU - Plesch, Eva
AU - Wartenberg, Philipp
AU - Arlt, Elisabeth
AU - Briukhovetska, Daria
AU - Ansari, Meshal
AU - Günsel, Gizem Günes
AU - Conlon, Thomas M.
AU - Wyatt, Amanda
AU - Wetzel, Sandra
AU - Teupser, Daniel
AU - Holdt, Lesca M.
AU - Ectors, Fabien
AU - Boekhoff, Ingrid
AU - Boehm, Ulrich
AU - García-Añoveros, Jaime
AU - Saftig, Paul
AU - Giera, Martin
AU - Kobold, Sebastian
AU - Schiller, Herbert B.
AU - Zierler, Susanna
AU - Gudermann, Thomas
AU - Wahl-Schott, Christian
AU - Bracher, Franz
AU - Yildirim, Ali Önder
AU - Biel, Martin
AU - Grimm, Christian
PY - 2022/1
Y1 - 2022/1
N2 - Lung emphysema and chronic bronchitis are the two most common causes of chronic obstructive pulmonary disease. Excess macrophage elastase MMP-12, which is predominantly secreted from alveolar macrophages, is known to mediate the development of lung injury and emphysema. Here, we discovered the endolysosomal cation channel mucolipin 3 (TRPML3) as a regulator of MMP-12 reuptake from broncho-alveolar fluid, driving in two independently generated Trpml3−/− mouse models enlarged lung injury, which is further exacerbated after elastase or tobacco smoke treatment. Mechanistically, using a Trpml3IRES-Cre/eR26-τGFP reporter mouse model, transcriptomics, and endolysosomal patch-clamp experiments, we show that in the lung TRPML3 is almost exclusively expressed in alveolar macrophages, where its loss leads to defects in early endosomal trafficking and endocytosis of MMP-12. Our findings suggest that TRPML3 represents a key regulator of MMP-12 clearance by alveolar macrophages and may serve as therapeutic target for emphysema and chronic obstructive pulmonary disease.
AB - Lung emphysema and chronic bronchitis are the two most common causes of chronic obstructive pulmonary disease. Excess macrophage elastase MMP-12, which is predominantly secreted from alveolar macrophages, is known to mediate the development of lung injury and emphysema. Here, we discovered the endolysosomal cation channel mucolipin 3 (TRPML3) as a regulator of MMP-12 reuptake from broncho-alveolar fluid, driving in two independently generated Trpml3−/− mouse models enlarged lung injury, which is further exacerbated after elastase or tobacco smoke treatment. Mechanistically, using a Trpml3IRES-Cre/eR26-τGFP reporter mouse model, transcriptomics, and endolysosomal patch-clamp experiments, we show that in the lung TRPML3 is almost exclusively expressed in alveolar macrophages, where its loss leads to defects in early endosomal trafficking and endocytosis of MMP-12. Our findings suggest that TRPML3 represents a key regulator of MMP-12 clearance by alveolar macrophages and may serve as therapeutic target for emphysema and chronic obstructive pulmonary disease.
U2 - 10.1038/s41467-021-27860-x
DO - 10.1038/s41467-021-27860-x
M3 - Article
SN - 2041-1723
JO - nature communications
JF - nature communications
M1 - 318
ER -