PT  - JOURNAL ARTICLE
AU  - Corrine R. Kliment
AU  - Jennifer M. K. Nguyen
AU  - Mary Jane Kaltreider
AU  - YaWen Lu
AU  - Steven M. Claypool
AU  - Josiah E. Radder
AU  - Frank C. Sciurba
AU  - Yingze Zhang
AU  - Alyssa D. Gregory
AU  - Pablo A. Iglesias
AU  - Venkataramana K. Sidhaye
AU  - Douglas N. Robinson
TI  - Adenine Nucleotide Translocase regulates the airway epithelium, mitochondrial metabolism and ciliary function
AID  - 10.1101/2020.05.18.101378
DP  - 2020 Jan 01
TA  - bioRxiv
PG  - 2020.05.18.101378
4099  - http://biorxiv.org/content/early/2020/05/19/2020.05.18.101378.short
4100  - http://biorxiv.org/content/early/2020/05/19/2020.05.18.101378.full
AB  - Airway hydration and ciliary function are critical to airway homeostasis and dysregulated in chronic obstructive lung disease (COPD). COPD is the 4th leading cause of death in the US and is impacted by cigarette smoking with no therapeutic options. We utilized a genetic selection approach in the amoeba Dictyostelium discoideum as a comparative discovery tool in lung biology to identify genetic protectors from cigarette smoke (CS). Adenine nucleotide translocase (ANT), a mitochondrial ADP/ATP transporter, was protective against CS in Dictyostelium and human bronchial epithelial cells. ANT2 gene expression is reduced in lung tissue from COPD patients and in a mouse smoking model. ANT1 and ANT2 overexpression resulted in enhanced oxidative respiration and ATP flux. In addition to ANT’s presence in the mitochondria, ANT1 and ANT2 reside at the plasma membrane in airway epithelial cells and this localization plays a role in how ANTs regulate airway homeostasis. ANT2 overexpression stimulates airway surface liquid hydration by ATP and maintains ciliary beating after CS exposure, which are key functions of the airway. Our study highlights the potential of ANT modulation in protecting from dysfunctional mitochondrial metabolism, airway hydration, and ciliary motility in COPD.Competing Interest StatementThe authors have declared no competing interest.