Hypoxia upregulates lung microvascular neurokinin-1 receptor expression.
Hypoxia upregulates lung microvascular neurokinin-1 receptor expression.
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缺氧上调肺微血管神经激肽-1受体表达。
DOI:
10.1152/ajplung.00286.2005
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发表时间:
2006
期刊:
影响因子:
--
通讯作者:
Carpenter,ToddC
中科院分区:
文献类型:
--
作者:
Zee,EricD;Schomberg,Stacey;Carpenter,ToddC
Subacute exposure to moderate hypoxia can promote pulmonary edema formation. The tachykinins, a family of proinflammatory neuropeptides, have been implicated in the pathogenesis of pulmonary edema in some settings, including the pulmonary vascular leak associated with exposure to hypoxia. The effects of hypoxia on tachykinin receptor and peptide expression in the lung, however, remain poorly understood. We hypothesized that subacute exposure to moderate hypoxia increases lung neurokinin-1 (NK-1) receptor expression as well as lung substance P levels. We tested this hypothesis by exposing weanling Sprague-Dawley rats to hypobaric hypoxia (barometric pressure 0.5 atm) for 0, 24, 48, or 72 h. Hypoxia led to time-dependent increases in lung NK-1 receptor mRNA expression and lung NK-1 receptor protein levels at 48 and 72 h of exposure (P< 0.05). Immunohistochemistry and in situ NK-1 receptor labeling with substance P-conjugated fluorescent nanocrystals demonstrated that hypoxia increased NK-1 expression primarily in the pulmonary microvasculature and in alveolar macrophages. Hypoxia also led to increases in lung substance P levels by 48 and 72 h (P< 0.05) but led to a decrease in preprotachykinin mRNA levels (P< 0.05). We conclude that subacute exposure to moderate hypoxia upregulates lung NK-1 receptor expression and lung substance P peptide levels primarily in the lung microvasculature. We speculate that this effect may contribute to the formation of pulmonary edema in the setting of regional or environmental hypoxia.
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影响因子:
7.3
作者:
D. A. Walsh;M. Salmon;R. Featherstone;J. Wharton;M. Church;J. Polak
通讯作者:
J. Polak
DOI:
--
发表时间:
2001
期刊:
Brain research. Developmental brain research
影响因子:
--
作者:
M. Rodier;A. Laferriere;I. R. Moss
通讯作者:
I. R. Moss
DOI:
10.1016/j.bbrc.2004.12.030
发表时间:
2005-02-11
影响因子:
3.1
作者:
Lau, HY;Wong, FL;Bhatia, M
通讯作者:
Bhatia, M
DOI:
10.1152/ajpheart.00542.2005
发表时间:
2006-01-01
影响因子:
4.8
作者:
Baffert, F;Le, T;McDonald, DM
通讯作者:
McDonald, DM
DOI:
10.1152/ajplung.00181.2002
发表时间:
2003-01-01
影响因子:
4.9
作者:
Carpenter, TC;Schomberg, S;Weil, JV
通讯作者:
Weil, JV