Transport rather than diffusion-dependent route for nitric oxide gas activity in alveolar epithelium.
Transport rather than diffusion-dependent route for nitric oxide gas activity in alveolar epithelium.
复制标题
DOI：
10.1016/j.freeradbiomed.2010.04.020
复制
发表时间：
2010-07-15
影响因子：
7.4
通讯作者：
Auten, Richard L.
中科院分区：
文献类型：
--
作者：
Brahmajothi, Mulugu V.;Mason, S. Nicholas;Whorton, A. Richard;McMahon, Timothy J.;Auten, Richard L.
关键词：
The pathway by which inhaled NO gas enters pulmonary alveolar epithelial cells has not been directly tested. Although the expected mechanism is diffusion, another route is the formation of S-nitroso-L-cysteine, which then enters the cell through the L-type amino acid transporter(LAT). To determine if NO gas also enters alveolar epithelium this way, we exposed alveolar epithelial—rat type I, type II, L2, R3/1, and human A549—cells to NO gas at air liquid interface in the presence of L- and D-cysteine ± LAT competitors. NO gas exposure concentration-dependently increased intracellular NO and S-nitrosothiol levels in the presence of L- but not D-cysteine, which was inhibited by LAT competitors, and was inversely proportional to diffusion distance. The effect of L-cysteine on NO uptake was also concentration dependent. Without pre-incubation with L-cysteine, NO uptake was significantly reduced. We found similar effects using ethyl nitrite gas in place of NO. Exposure to either gas induced activation of soluble guanylyl cylase in a parallel manner, consistent with LAT-dependence. We conclude that NO gas uptake by alveolar epithelium achieves NO-based signaling predominantly by forming extracellular S-nitroso-L-cysteine that is taken up through LAT, rather than by diffusion. Augmenting extracellular S-nitroso-L-cysteine formation may augment pharmacological actions of inhaled NO gas.
登录
查看更多内容
DOI：
10.1165/rcmb.2005-0205oc
发表时间：
2006-02-01
影响因子：
6.4
作者：
Manzer, R;Wang, JR;Mason, RJ
通讯作者：
Mason, RJ
DOI：
10.1165/ajrcmb.11.5.7946386
发表时间：
1994-11-01
影响因子：
6.4
作者：
ABE, MK;CHAO, TSO;HERSHENSON, MB
通讯作者：
HERSHENSON, MB
DOI：
10.1165/rcmb.2007-0128oc
发表时间：
2008-05-01
影响因子：
6.4
作者：
Lowry, Matthew H.;McAllister, Brian P.;Joyce-Brady, Martin
通讯作者：
Joyce-Brady, Martin
影响因子：
5
作者：
Chen, JW;Chen, ZM;Liu, L
通讯作者：
Liu, L
DOI：
10.1165/rcmb.2006-0347oc
发表时间：
2007-06-01
影响因子：
6.4
作者：
Lindert, Jens;Perlman, Carrie E.;Bhattacharya, Jahar
通讯作者：
Bhattacharya, Jahar