Airway remodeling in asthma amplifies heterogeneities in smooth muscle shortening causing hyperresponsiveness.
Airway remodeling in asthma amplifies heterogeneities in smooth muscle shortening causing hyperresponsiveness.
复制标题
哮喘中的气道重塑放大了平滑肌缩短的异质性,导致高反应性。
DOI:
10.1152/jappl.1999.86.6.2001
复制
发表时间:
1999
期刊:
影响因子:
--
通讯作者:
Lutchen,KR
中科院分区:
文献类型:
--
作者:
Gillis,HL;Lutchen,KR
Although airway remodeling and inflamation in asthma can amplify the constriction response of a single airway, their influence on the structural changes in the whole airway network is unknown. We present a morphometric model of the human lung that incorporates cross-sectional wall areas corresponding to the adventitia, airway smooth muscle (ASM), and mucosa for healthy and mildly and severely asthmatic airways and the influence of parenchymal tethering. A heterogeneous ASM percent shortening stimulus is imposed, causing distinct constriction patterns for healthy and asthmatic airways. We calculate lung resistance and elastance from 0.1 to 5 Hz. We show that, for a given ASM stimulus, the distribution of wall area in asthmatic subjects will amplify not only the mean but the heterogeneity of constriction in the lung periphery. Moreover, heterogeneous ASM shortening that would produce only mild changes in the healthy lung can cause hyperresponsive changes in lung resistance and elastance at typical breathing rates in the asthmatic lung, even with relatively small increases in airway resistance. This condition arises when airway closures occur randomly in the lung periphery. We suggest that heterogeneity is a crucial determinant of hyperresponsiveness in asthma and that acute asthma is more a consequence of extensive airway wall inflamation and remodeling, predisposing the lung to produce an acute pattern of heterogeneous constriction.
登录
查看更多内容
影响因子:
3.2
作者:
J. Samaras;R. Darling
通讯作者:
R. Darling
影响因子:
3.3
作者:
B. Wiggs;R. Moreno;J. Hogg;C. Hilliam;P. Paré
通讯作者:
P. Paré
DOI:
10.1164/arrd.1986.133.6.1171
发表时间:
2015
期刊:
The American review of respiratory disease
影响因子:
--
作者:
R. Moreno;J. Hogg;P. Paré
通讯作者:
P. Paré
DOI:
10.1164/ajrccm.156.6.9611016
发表时间:
1997-12-01
影响因子:
24.7
作者:
Fredberg, JJ;Inouye, D;Shore, SA
通讯作者:
Shore, SA
影响因子:
3.3
作者:
Lambert, RK;Pare, PD
通讯作者:
Pare, PD