Distribution of airway contractile responses within the major diameter bronchi during exogenous bronchoconstriction.
Distribution of airway contractile responses within the major diameter bronchi during exogenous bronchoconstriction.
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外源性支气管收缩期间大直径支气管内气道收缩反应的分布。
DOI:
10.1164/arrd.1987.135.5.1105
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发表时间:
1987
期刊:
影响因子:
--
通讯作者:
Leff,AR
中科院分区:
文献类型:
--
作者:
Shioya,T;Solway,J;Munoz,NM;Mack,M;Leff,AR
The distribution of bronchoconstrictor responses within airway generations zero to 6 was studied by tantalum bronchography during exogenous bronchoconstriction with methacholine (MCh), prostaglandin F2α(PGF2α), norepinephrine (NE), and the thromboxane mimetic U-46619 [(15S)-hydroxyl-11α,9α-(epoxymethano)prosta-5Z,13E-dienoic acid] in 12 mongrel dogs undergoing vagotomy and beta-adrenergic blockade. Dose-response curves to each agonist were generated in random order, and tantalum bronchograms and simultaneous measurements of pulmonary resistance (Rl) and dynamic pulmonary compliance (Cdyn) were obtained at the plateau of the response of each dose of agonist after intravenous (iv) infusion. At 5 × 10−7mol/kg, NE (after β-adrenergic blockade) caused an increase to 254 ± 27.3%, PGF2αto 368 ± 50.0%, U-46619 to 522 ± 98.5%, and MCh to 1,204 ± 173% of baseline in Rl. However, airway diameter changes within the major diameter airways varied substantially for each agonist. Methacholine caused substantial contraction in all airways. Neither NE nor U-46619 caused significant airway narrowing in generations zero or 1, although both agonists caused > 30% narrowing in sixth generation airways. Prostaglandin F2α(5 × 10−7mol/kg) cause an increase in Rlof > 350%; however, this was accompanied by an ∼10%increase(dilation) in airway diameter in generation 1 through generation 4 airways and an approximate 25%narrowingin generation 6 airways. We demonstrate that both alpha-adrenergic agonists and thromboxane analog cause substantial bronchoconstriction in situ in the central airways of the lung. We also demonstrate that for comparable changes in Rl, the distribution of bronchoconstrictor responseswithinthe major diameter bronchi varies substantially for each airway with each contractile agonist.
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DOI:
10.1152/jappl.1978.44.3.406
发表时间:
1978
期刊:
Journal of applied physiology: respiratory, environmental and exercise physiology
影响因子:
--
作者:
E. Spannhake;R. Lemen;M. J. Wegmann;A. Hyman;P. Kadowitz
通讯作者:
P. Kadowitz
DOI:
10.1172/jci107719
发表时间:
1974
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
Jefrey M. Drazen;K.;Frank Austen
通讯作者:
Frank Austen
影响因子:
6.7
作者:
J. Nadel;G. A. Cabezas;J. Austin
通讯作者:
J. Austin
DOI:
10.1152/jappl.1983.55.1.113
发表时间:
1983
期刊:
Journal of applied physiology: respiratory, environmental and exercise physiology
影响因子:
--
作者:
A. Leff;N. Muñoz;S. Hendrix
通讯作者:
S. Hendrix
DOI:
10.1164/arrd.1985.132.5.1113
发表时间:
1985
期刊:
The American review of respiratory disease
影响因子:
--
作者:
N. Matsumoto;H. Inoue;M. Ichinose;M. Ishii;Chieko Inoue;H. Sasaki;T. Takishima
通讯作者:
T. Takishima