Bicarbonate and functional CFTR channel are required for proper mucin secretion and link cystic fibrosis with its mucus phenotype.

Bicarbonate and functional CFTR channel are required for proper mucin secretion and link cystic fibrosis with its mucus phenotype.
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DOI:
10.1084/jem.20120562
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发表时间:
2012-07-02
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Hansson GC
Hansson GC
中科院分区:
其他
文献类型:
--
作者:
Gustafsson JK;Ermund A;Ambort D;Johansson ME;Nilsson HE;Thorell K;Hebert H;Sjövall H;Hansson GC

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Ileal mucus in CftrΔ508 mice is more adherent, denser, and less penetrable than that of WT mice, but addition of bicarbonate normalizes the properties of CftrΔ508 mucus. Cystic fibrosis (CF) is caused by a nonfunctional chloride and bicarbonate ion channel (CF transmembrane regulator [CFTR]), but the link to the phenomenon of stagnant mucus is not well understood. Mice lacking functional CFTR (CftrΔ508) have no lung phenotype but show similar ileal problems to humans. We show that the ileal mucosa in CF have a mucus that adhered to the epithelium, was denser, and was less penetrable than that of wild-type mice. The properties of the ileal mucus of CF mice were normalized by secretion into a high concentration sodium bicarbonate buffer (∼100 mM). In addition, bicarbonate added to already formed CF mucus almost completely restored the mucus properties. This knowledge may provide novel therapeutic options for CF.
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