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Chronic airway epithelial hypoxia exacerbates injury in muco-obstructive lung disease through mucus hyperconcentration.
Mikami, Yu; Grubb, Barbara R; Rogers, Troy D; Dang, Hong; Asakura, Takanori; Kota, Pradeep; Gilmore, Rodney C; Okuda, Kenichi; Morton, Lisa C; Sun, Ling; Chen, Gang; Wykoff, Jason A; Ehre, Camille; Vilar, Juan; van Heusden, Catharina; Livraghi-Butrico, Alessandra; Gentzsch, Martina; Button, Brian; Stutts, M Jackson; Randell, Scott H; O'Neal, Wanda K; Boucher, Richard C.
  • Mikami Y; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Grubb BR; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Rogers TD; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Dang H; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Asakura T; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Kota P; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Gilmore RC; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Okuda K; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Morton LC; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Sun L; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Chen G; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Wykoff JA; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Ehre C; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Vilar J; Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
  • van Heusden C; Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
  • Livraghi-Butrico A; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Gentzsch M; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Button B; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Stutts MJ; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
  • Randell SH; Center for Environmental Health and Susceptibility, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
  • O'Neal WK; Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
  • Boucher RC; Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
Sci Transl Med ; 15(699): eabo7728, 2023 06 07.
Article en En | MEDLINE | ID: mdl-37285404
ABSTRACT
Unlike solid organs, human airway epithelia derive their oxygen from inspired air rather than the vasculature. Many pulmonary diseases are associated with intraluminal airway obstruction caused by aspirated foreign bodies, virus infection, tumors, or mucus plugs intrinsic to airway disease, including cystic fibrosis (CF). Consistent with requirements for luminal O2, airway epithelia surrounding mucus plugs in chronic obstructive pulmonary disease (COPD) lungs are hypoxic. Despite these observations, the effects of chronic hypoxia (CH) on airway epithelial host defense functions relevant to pulmonary disease have not been investigated. Molecular characterization of resected human lungs from individuals with a spectrum of muco-obstructive lung diseases (MOLDs) or COVID-19 identified molecular features of chronic hypoxia, including increased EGLN3 expression, in epithelia lining mucus-obstructed airways. In vitro experiments using cultured chronically hypoxic airway epithelia revealed conversion to a glycolytic metabolic state with maintenance of cellular architecture. Chronically hypoxic airway epithelia unexpectedly exhibited increased MUC5B mucin production and increased transepithelial Na+ and fluid absorption mediated by HIF1α/HIF2α-dependent up-regulation of ß and γENaC (epithelial Na+ channel) subunit expression. The combination of increased Na+ absorption and MUC5B production generated hyperconcentrated mucus predicted to perpetuate obstruction. Single-cell and bulk RNA sequencing analyses of chronically hypoxic cultured airway epithelia revealed transcriptional changes involved in airway wall remodeling, destruction, and angiogenesis. These results were confirmed by RNA-in situ hybridization studies of lungs from individuals with MOLD. Our data suggest that chronic airway epithelial hypoxia may be central to the pathogenesis of persistent mucus accumulation in MOLDs and associated airway wall damage.
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Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Fibrosis Quística / Enfermedad Pulmonar Obstructiva Crónica / COVID-19 Límite: Humans Idioma: En Año: 2023 Tipo del documento: Article
Texto completo
Imprimir
XML
PubMed Links
Search on Google

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Fibrosis Quística / Enfermedad Pulmonar Obstructiva Crónica / COVID-19 Límite: Humans Idioma: En Año: 2023 Tipo del documento: Article