scholarly journals Silymarin attenuates cigarette smoke extract-induced inflammation via simultaneous inhibition of autophagy and ERK/p38 MAPK pathway in human bronchial epithelial cells

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Diandian Li ◽  
Jun Hu ◽  
Tao Wang ◽  
Xue Zhang ◽  
Lian Liu ◽  
...  
Keyword(s):  
Epithelial Cells ◽  
Cigarette Smoke ◽  
P38 Mapk ◽  
Mapk Pathway ◽  
Cigarette Smoke Extract ◽  
Bronchial Epithelial Cells ◽  
Human Bronchial Epithelial Cells ◽  
Bronchial Epithelial ◽  
P38 Mapk Pathway ◽  
Simultaneous Inhibition

Inhibition of chloride secretion in human bronchial epithelial cells by cigarette smoke extract

2005 ◽  
Vol 288 (5) ◽  
pp. L894-L902 ◽  
Author(s):  
James L. Kreindler ◽  
Alan D. Jackson ◽  
Philip A. Kemp ◽  
Robert J. Bridges ◽  
Henry Danahay
Keyword(s):  
Cystic Fibrosis ◽  
Epithelial Cells ◽  
Ion Transport ◽  
Cigarette Smoke ◽  
Apical Membrane ◽  
Chloride Secretion ◽  
Cigarette Smoke Extract ◽  
Bronchial Epithelial Cells ◽  
Human Bronchial Epithelial Cells ◽  
Bronchial Epithelial

Chronic bronchitis, a disease mainly of cigarette smokers, shares many clinical features with cystic fibrosis, a disease of altered ion transport, suggesting that the negative effects of cigarette smoke on mucociliary clearance may be mediated through alterations in ion transport. We tested the hypothesis that cigarette smoke extract would inhibit chloride secretion in human bronchial epithelial cells. In agreement with studies in canine trachea, cigarette smoke extract inhibited net chloride secretion without affecting sodium transport. We performed microelectrode impalements and impedance analysis studies to investigate the physiological mechanisms of this inhibition. These data demonstrated that cigarette smoke extract caused an acute increase in membrane resistances in conjunction with apical membrane hyperpolarization, an effect consistent with inhibition of an apical membrane anion conductance. After this acute phase, both membrane resistances decreased while membrane potentials continued to hyperpolarize, indicating that cigarette smoke extract also inhibited the basolateral entry of chloride into the cell. Furthermore, cigarette smoke extract caused an increase in mucin secretion. Therefore, the ion transport phenotype of human bronchial epithelial cells exposed to cigarette smoke extract is similar to that of cystic fibrosis epithelia in which there is sodium absorption out of proportion to chloride secretion in the setting of increased mucus secretion.

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