Emerging relationship between CFTR, actin and tight junction organization in cystic fibrosis airway epithelium

被引:20
作者
Castellani, Stefano [1 ]
Favia, Maria [2 ]
Guerra, Lorenzo [2 ]
Carbone, Annalucia [1 ]
Abbattiscianni, Anna Claudia [2 ]
Di Gioia, Sante [1 ]
Casavola, Valeria [2 ]
Conese, Massimo [1 ]
机构
[1] Univ Foggia, Dept Med & Surg Sci, Lab Expt & Regenerat Med, Via Napoli 20, I-71122 Foggia, Italy
[2] Univ Bari, Dept Biosci Biotechnol & Biopharmaceut, Bari, Italy
关键词
Cystic fibrosis; Airway epithelium; Actin cytoskeleton; Tight junction; Barrier function; Neutrophils; Mesenchymal stem cells; TRANSMEMBRANE-CONDUCTANCE-REGULATOR; TRANSEPITHELIAL ELECTRICAL-RESISTANCE; PDZ-INTERACTING DOMAIN; BARRIER FUNCTION; PARACELLULAR PERMEABILITY; APICAL MEMBRANE; FUNCTIONAL EXPRESSION; BRONCHIAL EPITHELIUM; ADHESION MOLECULE; SUBMUCOSAL GLANDS;
D O I
10.14670/HH-11-842
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Cystic fibrosis (CF), one of the most common genetic disorders affecting primarily Caucasians, is due to mutations in the CF Transmembrane Conductance Regulator (CFTR) gene, encoding for a chloride channel also acting as regulator of other transmembrane proteins. In healthy subjects, CFTR is maintained in its correct apical plasma membrane location via the formation of a multiprotein complex in which scaffold proteins (such as NHERF1) and signaling molecules (such as cAMP and protein kinases) guarantee its correct functioning. In CF, a disorganized and dysfunctional airway epithelium brings an altered flux of ions and water into the lumen of bronchioles, consequent bacterial infections and an enormous influx of inflammatory cells (mainly polymorphonuclear neutrophils) into the airways. Recent evidence in healthy airway cells supports the notion that CFTR protein/function is strictly correlated with the actin cytoskeleton and tight junctions status. In CF cells, the most frequent CFTR gene mutation, F508del, has been shown to be associated with a disorganized actin cytoskeleton and altered tight junction permeability. Thus, the correct localization of CFTR on the apical plasma membrane domain through the formation of the scaffolding and signaling complex is likely fundamental to determine a physiological airway epithelium. The correction of CFTR mutations by either gene or drug therapies, as well as by stem cell-based interventions, can determine the resumption of a physiological organization of actin stress fibers and TJ structure and barrier function, further indicating the close interrelationship among these processes.
引用
收藏
页码:445 / 459
页数:15
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