The SCOR will investigate the pathogenesis of CF lung disease. The Projects will focus on potential links between abnormal electrolyte transport and lung infection. Two major contrasting views of CF pathogenesis will be tested: 1) the isotonic volume hypothesis; and 2) the hypotonic ASL hypothesis. To differentiate between these hypothesis, novel cell biologic, biochemical, physiologic, gene targeted mice, and clinical studies are required to: 1) fill in gaps in our understanding of normal airway epithelial functions; and 2) test the effects of abnormal CFTR function on this physiology. Project I (RCB, P.I.) will distinguish between airway epithelia as volume transporters versus ionic composition regulators, by generating a balance sheet describing ion and water flows transepithelially in small and large airways and within the airway tree by testing whether ASL moves axially, followed by studies of the effects of mutations in CFTR on these processes. Project II (MJS) will generate """"""""topographical"""""""" information on the organization of CFTR and its PKA regulators in the apical membrane. The goals will be to understand whether specific PKA regulation of basal C1-conductance exists and how PKA-CFTR- mediated regulation of other transport proteins occurs. Project III (BHK, P.I.) focuses on the general issue of the protective effects of C1- permeability in the lung. This project tests the hypothesis that molecularly deletion in mice a key protein that mediates transcellular Cl- flow (the Na+-K+-2Cl-co transporter) will reduce Cl-flows in mouse airways, render non-functional Cl-/a, and lead to lung disease. Project IV (MRK, P.I.) will measure normal epithelial function and CF pathogenesis in newborns, measuring ASL ion composition and testing the predictions of each hypothesis by measuring the sequence of mucin plugging and infection. The SCOR is supported by 4 Cores: Administrative (A), Cell Culture (B), Analytic (C), and Morphology (D). The goals of SCOR are to provide a comprehensive description of the metabolism of ASL and the CF-specific abnormalities in ASL metabolism so that novel therapies and surrogate markers for such therapies can be developed for CF lung disease.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Specialized Center (P50)
Project #
5P50HL060280-03
Application #
6184473
Study Section
Special Emphasis Panel (ZHL1-CSR-B (M1))
Project Start
1998-09-01
Project End
2003-08-31
Budget Start
2000-09-01
Budget End
2001-08-31
Support Year
3
Fiscal Year
2000
Total Cost
$1,627,415
Indirect Cost
Name
University of North Carolina Chapel Hill
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
078861598
City
Chapel Hill
State
NC
Country
United States
Zip Code
27599
Chen, Gang; Volmer, Allison S; Wilkinson, Kristen J et al. (2018) Role of Spdef in the Regulation of Muc5b Expression in the Airways of Naive and Mucoobstructed Mice. Am J Respir Cell Mol Biol 59:383-396
Livraghi-Butrico, A; Grubb, B R; Wilkinson, K J et al. (2017) Contribution of mucus concentration and secreted mucins Muc5ac and Muc5b to the pathogenesis of muco-obstructive lung disease. Mucosal Immunol 10:829
Livraghi-Butrico, Alessandra; Grubb, Barbara R; Wilkinson, Kristen J et al. (2017) Contribution of mucus concentration and secreted mucins Muc5ac and Muc5b to the pathogenesis of muco-obstructive lung disease. Mucosal Immunol 10:395-407
Saini, Yogesh; Wilkinson, Kristen J; Terrell, Kristy A et al. (2016) Neonatal Pulmonary Macrophage Depletion Coupled to Defective Mucus Clearance Increases Susceptibility to Pneumonia and Alters Pulmonary Immune Responses. Am J Respir Cell Mol Biol 54:210-21
Saini, Yogesh; Dang, Hong; Livraghi-Butrico, Alessandra et al. (2014) Gene expression in whole lung and pulmonary macrophages reflects the dynamic pathology associated with airway surface dehydration. BMC Genomics 15:726
Mellnik, John; Vasquez, Paula A; McKinley, Scott A et al. (2014) Micro-heterogeneity metrics for diffusion in soft matter. Soft Matter 10:7781-96
Livraghi-Butrico, Alessandra; Kelly, Elizabeth J; Wilkinson, Kristen J et al. (2013) Loss of Cftr function exacerbates the phenotype of Na(+) hyperabsorption in murine airways. Am J Physiol Lung Cell Mol Physiol 304:L469-80
Graeber, Simon Y; Zhou-Suckow, Zhe; Schatterny, Jolanthe et al. (2013) Hypertonic saline is effective in the prevention and treatment of mucus obstruction, but not airway inflammation, in mice with chronic obstructive lung disease. Am J Respir Cell Mol Biol 49:410-7
Livraghi-Butrico, A; Kelly, E J; Klem, E R et al. (2012) Mucus clearance, MyD88-dependent and MyD88-independent immunity modulate lung susceptibility to spontaneous bacterial infection and inflammation. Mucosal Immunol 5:397-408
Kreda, Silvia M; Davis, C William; Rose, Mary Callaghan (2012) CFTR, mucins, and mucus obstruction in cystic fibrosis. Cold Spring Harb Perspect Med 2:a009589

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