Publication Date:
2016-01-30
Description:
Cystic fibrosis (CF) is caused by mutations in the gene that encodes the cystic fibrosis transmembrane conductance regulator (CFTR) anion channel. In humans and pigs, the loss of CFTR impairs respiratory host defenses, causing airway infection. But CF mice are spared. We found that in all three species, CFTR secreted bicarbonate into airway surface liquid. In humans and pigs lacking CFTR, unchecked H(+) secretion by the nongastric H(+)/K(+) adenosine triphosphatase (ATP12A) acidified airway surface liquid, which impaired airway host defenses. In contrast, mouse airways expressed little ATP12A and secreted minimal H(+); consequently, airway surface liquid in CF and non-CF mice had similar pH. Inhibiting ATP12A reversed host defense abnormalities in human and pig airways. Conversely, expressing ATP12A in CF mouse airways acidified airway surface liquid, impaired defenses, and increased airway bacteria. These findings help explain why CF mice are protected from infection and nominate ATP12A as a potential therapeutic target for CF.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shah, Viral S -- Meyerholz, David K -- Tang, Xiao Xiao -- Reznikov, Leah -- Abou Alaiwa, Mahmoud -- Ernst, Sarah E -- Karp, Philip H -- Wohlford-Lenane, Christine L -- Heilmann, Kristopher P -- Leidinger, Mariah R -- Allen, Patrick D -- Zabner, Joseph -- McCray, Paul B Jr -- Ostedgaard, Lynda S -- Stoltz, David A -- Randak, Christoph O -- Welsh, Michael J -- 5T32GM007337/GM/NIGMS NIH HHS/ -- DK054759/DK/NIDDK NIH HHS/ -- F30 HL123239/HL/NHLBI NIH HHS/ -- F30HL123239/HL/NHLBI NIH HHS/ -- HL091842/HL/NHLBI NIH HHS/ -- HL117744/HL/NHLBI NIH HHS/ -- HL51670/HL/NHLBI NIH HHS/ -- K08HL097071/HL/NHLBI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2016 Jan 29;351(6272):503-7. doi: 10.1126/science.aad5589.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of Iowa, Iowa City, IA 52242, USA. Department of Molecular Physiology and Biophysics, Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA. ; Department of Pathology, University of Iowa, Iowa City, IA 52242, USA. ; Department of Medicine, University of Iowa, Iowa City, IA 52242, USA. Howard Hughes Medical Institute, University of Iowa, Iowa City, IA 52242, USA. ; Department of Medicine, University of Iowa, Iowa City, IA 52242, USA. ; Department of Pediatrics University of Iowa, Iowa City, IA 52242, USA. ; Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA. ; Department of Pediatrics University of Iowa, Iowa City, IA 52242, USA. Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA. ; Department of Medicine, University of Iowa, Iowa City, IA 52242, USA. Department of Molecular Physiology and Biophysics, Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA. Department of Biomedical Engineering, College of Engineering, University of Iowa, Iowa City, IA 52242, USA. ; Department of Medicine, University of Iowa, Iowa City, IA 52242, USA. Department of Molecular Physiology and Biophysics, Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA. Howard Hughes Medical Institute, University of Iowa, Iowa City, IA 52242, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26823428" target="_blank"〉PubMed〈/a〉
Keywords:
Acids/metabolism
;
Animals
;
Bicarbonates/metabolism
;
Cystic Fibrosis/*metabolism/*microbiology
;
H(+)-K(+)-Exchanging ATPase/genetics/*metabolism
;
Humans
;
Hydrogen-Ion Concentration
;
Lung/*metabolism/*microbiology
;
Mice
;
Mice, Inbred CFTR/genetics/metabolism
;
Mice, Transgenic
;
Swine
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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