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- W3084828919 abstract "ABSTRACT Exocrine pancreatic damage is a common complication of cystic fibrosis (CF), which can significantly debilitate the quality of life and life expectancy of CF patients. The cystic fibrosis transmembrane conductance regulator (CFTR) has a major role in pancreatic ductal ion secretion, however, it presumably has an influence on intracellular signaling as well. Here we describe in multiple model systems, including iPSC-derived human pancreatic organoids from CF patients, that the activity of PMCA4 is impaired by the decreased expression of CFTR in ductal cells. The regulation of PMCA4, which colocalizes and physically interacts with CFTR on the apical membrane of the ductal cells, is dependent on the calmodulin binding ability of CFTR. Moreover, CFTR seems to be involved in the process of the apical recruitment of calmodulin, which enhances its role in calcium signaling and homeostasis. Sustained intracellular Ca 2+ elevation in CFTR KO cells undermined the mitochondrial function and increased apoptosis. Based on these, the prevention of sustained intracellular Ca 2+ overload may improve the exocrine pancreatic function and may have a potential therapeutic aspect in CF." @default.
- W3084828919 created "2020-09-21" @default.
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- W3084828919 date "2020-09-11" @default.
- W3084828919 modified "2023-10-09" @default.
- W3084828919 title "Decreased calmodulin recruitment triggers PMCA4 dysfunction and pancreatic injury in cystic fibrosis" @default.
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- W3084828919 doi "https://doi.org/10.1101/2020.09.10.290940" @default.
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