https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&id=34016558&retmode=xml&tool=Litmetric&email=readroberts32@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09 340165582022030120230102
1873-50102112022JanJournal of cystic fibrosis : official journal of the European Cystic Fibrosis SocietyJ Cyst FibrosLack of CFTR alters the ferret pancreatic ductal epithelial secretome and cellular proteome: Implications for exocrine/endocrine signaling.172180172-18010.1016/j.jcf.2021.04.010S1569-1993(21)00120-XCystic fibrosis (CF) related diabetes is the most common comorbidity for CF patients and associated with islet dysfunction. Exocrine pancreas remodeling in CF alters the microenvironment in which islets reside. Since CFTR is mainly expressed in pancreatic ductal epithelium, we hypothesized altered CF ductal secretions could impact islet function through paracrine signals.We evaluated the secretome and cellular proteome of polarized WT and CF ferret ductal epithelia using quantitative ratiometric mass spectrometry. Differentially secreted proteins (DSPs) or expressed cellular proteins were used to mine pathways, upstream regulators and the CFTR interactome to map candidate CF-associated alterations in ductal signaling and phenotype. Candidate DSPs were evaluated for their in vivo pancreatic expression patterns and their functional impact on islet hormone secretion.The secretome and cellular proteome of CF ductal epithelia was significantly altered relative to WT and implicated dysregulated TGFβ, WNT, and BMP signaling pathways. Cognate receptors of DSPs from CF epithelia were equally distributed among endocrine, exocrine, and stromal pancreatic cell types. IGFBP7 was a downregulated DSP in CF ductal epithelia in vitro and exhibited reduced CF ductal expression in vivo. IGFBP7 also altered WT islet insulin secretion in response to glucose. Many CFTR-associated proteins, including SLC9A3R1, were differentially expressed in the CF cellular proteome. Upstream regulators of the differential CF ductal proteome included TGFβ, PDX1, AKT/PTEN, and INSR signaling. Data is available via ProteomeXchange with identifier PXD025126.These findings provide a proteomic roadmap for elucidating disturbances in autocrine and paracrine signals from CF pancreatic ducts and how they may alter islet function and maintenance.Copyright © 2021. Published by Elsevier B.V.RottiPavana GPGDept. of Anatomy and Cell Biology, The Univ. of Iowa, Iowa City, IA, USA; Dept. Biomedical Engineering, The Univ. of Iowa, Iowa City, IA, USA.EvansIdil AIADept. of Anatomy and Cell Biology, The Univ. of Iowa, Iowa City, IA, USA.ZhangYulongYDept. of Anatomy and Cell Biology, The Univ. of Iowa, Iowa City, IA, USA.LiangBoBDept. of Anatomy and Cell Biology, The Univ. of Iowa, Iowa City, IA, USA.CunicelliNathanNDept. of Anatomy and Cell Biology, The Univ. of Iowa, Iowa City, IA, USA.O'MalleyYunxiaYStead Family Department of Pediatrics, The Univ. of Iowa, Iowa City, IA, USA.NorrisAndrew WAWStead Family Department of Pediatrics, The Univ. of Iowa, Iowa City, IA, USA; Fraternal Order of Eagles Diabetes Research Center Roy J. and Lucille A. Carver College of Medicine.UcAliyeAStead Family Department of Pediatrics, The Univ. of Iowa, Iowa City, IA, USA; Department of Radiation Oncology, The Univ. of Iowa, Iowa City, IA, USA; Fraternal Order of Eagles Diabetes Research Center Roy J. and Lucille A. Carver College of Medicine.EngelhardtJohn FJFDept. of Anatomy and Cell Biology, The Univ. of Iowa, Iowa City, IA, USA; Dept. Biomedical Engineering, The Univ. of Iowa, Iowa City, IA, USA; Fraternal Order of Eagles Diabetes Research Center Roy J. and Lucille A. Carver College of Medicine. Electronic address: john-engelhardt@uiowa.edu.engP30 DK054759DKNIDDK NIH HHSUnited StatesR01 DK097820DKNIDDK NIH HHSUnited StatesRC2 DK124207DKNIDDK NIH HHSUnited StatesJournal ArticleResearch Support, N.I.H., ExtramuralResearch Support, Non-U.S. Gov't20210517
NetherlandsJ Cyst Fibros1011289661569-19930CFTR protein, human0Proteome126880-72-6Cystic Fibrosis Transmembrane Conductance RegulatorIMAnimalsCystic FibrosisgeneticsmetabolismCystic Fibrosis Transmembrane Conductance RegulatorgeneticsDiabetes MellitusmetabolismExocrine Pancreatic InsufficiencymetabolismFerretsmetabolismHumansPancreas, ExocrinemetabolismPancreatic DuctsmetabolismProteomemetabolismSecretomemetabolismCystic FibrosisCystic Fibrosis Related Diabetesductal cellspancreasproteomesecretomeDeclaration of competing interest The authors declare no existing conflicts of interest.
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