Asymmetric Dimethylarginine Blocks Nitric Oxide-Mediated Alcohol-Stimulated Cilia Beating

Wyatt, T. A.; Wells, S. M.; Alsaidi, Z. A.; DeVasure, J. M.; Klein, E. B.; Bailey, K. L.; Sisson, J. H.

doi:10.1155/2013/592892

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Asymmetric Dimethylarginine Blocks Nitric Oxide-Mediated Alcohol-Stimulated Cilia Beating

Published Date:

Nov 06 2013

Publisher's site:

http://dx.doi.org/10.1155/2013/592892

Source:

Mediators Inflamm. 2013; 2013.

[PDF-4.16 MB]

Details:

Alternative Title:

Mediators Inflamm

Personal Author:

Wyatt, T. A. ; Wells, S. M. ; Alsaidi, Z. A. ; DeVasure, J. M. ; Klein, E. B. ; ... More ▼

Description:

The airway epithelium is exposed to alcohol during drinking through direct exhalation of volatized ethanol from the bronchial circulation. Alcohol exposure leads to a rapid increase in the cilia beat frequency (CBF) of bronchial epithelial cells followed by a chronic desensitization of cilia stimulatory responses. This effect is governed in part by the nitric oxide regulation of cyclic guanosine and adenosine monophosphate-dependent protein kinases (PKG and PKA) and is not fully understood. Asymmetric dimethylarginine (ADMA), an endogenous inhibitor of nitric oxide synthase, is implicated in the pathogenesis of several pulmonary disorders. We hypothesized that the inhibition of nitric oxide synthase by ADMA blocks alcohol-stimulated increases in CBF. To test this hypothesis, ciliated primary bovine bronchial epithelial cells (BBEC) were preincubated with ADMA (100 µM) and stimulated with 100 mM ethanol. CBF was measured and PKA assayed. By 1 hr, ethanol activated PKA, resulting in elevated CBF. Both alcohol-induced PKA activation and CBF were inhibited in the presence of ADMA. ADMA alone had no effect on PKA activity or CBF. Using a mouse model overexpressing the ADMA-degrading enzyme, dimethylarginine dimethylaminohydrolase (DDAH), we examined PKA and CBF in precision-cut mouse lung slices. Alcohol-stimulated increases in lung slice PKA and CBF were temporally enhanced in the DDAH mice versus control mice.

Subject:

[+]

Pubmed ID:

24307761

Pubmed Central ID:

PMC3836567

Document Type:

Journal Article

Funding:

1U54 OH010162-01/OH/NIOSH CDC HHS/United States ; K08 AA019503/AA/NIAAA NIH HHS/United States ; R00 HL088550/HL/NHLBI NIH HHS/United States ; R01 AA008769/AA/NIAAA NIH HHS/United States ; R01 AA008769/AA/NIAAA NIH HHS/United States ; ... More ▼

Collection(s):

CDC Public Access

Main Document Checksum:

[+]

Supporting Files:

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