Modulation of surfactant protein D expression by glucocorticoids in fetal rat lung.

Modulation of surfactant protein D expression by glucocorticoids in fetal rat lung.
复制标题

糖皮质激素对胎鼠肺表面活性蛋白 D 表达的调节。

DOI:
10.1165/ajrcmb.10.4.8136157
复制
发表时间:
1994
影响因子:
6.4
通讯作者:
Crouch,E
Crouch,E
中科院分区:
医学1区
文献类型:
--
作者:
Mariencheck,W;Crouch,E

文献摘要

参考文献

被引文献

相似文献

肺表面活性物质蛋白D (SP-D)的产生在妊娠后期突然增加,并且这种蛋白在子宫内暴露于糖皮质激素后在肺组织中的积累增加。为了检查这些事件的调节,我们给定时怀孕的大鼠注射地塞米松(地塞米松,1 mg/kg/天肌注,持续3天)或生理盐水,并在妊娠第19至21天切除肺。通过免疫印迹、Northern杂交和核径流转录分析,对合并的胎儿肺样本进行SP-D蛋白、mRNA和基因转录分析。对照19天的肺显示几乎检测不到SP-D基因转录水平,SP-D信息的积累可以忽略不计。然而,在给药19天的大鼠肺中,SP-D转录以及SP-D mRNA和蛋白的积累很容易被检测到。地塞米松还引起19日龄胎儿肺外植体SP-D蛋白和mRNA积累的剂量和时间依赖性增加。使用大鼠SP-D抗体对对照19天肺进行免疫组化,结果显示只有少量气道上皮细胞被弱标记。相比之下,dex暴露大鼠气道和上皮小管内的柱状和立方上皮细胞以及原始气囊内的立方细胞染色强烈。原位杂交分析显示,在暴露于dex的19天肺中,标记上皮细胞的数量、强度和分布都发生了类似的变化,并在成人肺中显示了肺泡型II和非纤毛柱状细胞的标记。这些数据表明,伴随子宫内糖皮质激素暴露的肺成熟加速与肺上皮细胞SP-D基因转录和蛋白质产生的过早增加有关。
The production of pulmonary surfactant protein D (SP-D) increases abruptly during late gestation, and the accumulation of this protein in lung tissue is increased following the exposure of fetal rats to glucocorticoids in utero. To examine the regulation of these events, we administered dexamethasone (Dex; 1 mg/kg/day intramuscularly for 3 days), or saline, to timed-pregnant rats and harvested the lungs on days 19 to 21 of gestation. Samples of pooled fetal lungs were analyzed for SP-D protein, mRNA, and gene transcription by immunoblot, Northern hybridization, and nuclear run-off transcription assays. Lungs from 19 day controls showed barely detectable levels of SP-D gene transcription and negligible accumulation of SP-D message. However, SP-D transcription and the accumulation of SP-D mRNA and protein were readily detected in lungs from 19 day Dex-treated rats. Dexamethasone also caused dose- and time-dependent increases in SP-D protein and mRNA accumulation in 19 day fetal lung explants. Immunohistochemistry of control 19 day lung using antibodies to rat SP-D showed only weak labeling of a small number of airway epithelial cells. By contrast, Dex-exposed rats showed strong staining of columnar and cuboidal epithelial cells lining airways and epithelial tubules and cuboidal cells lining primitive air sacs. In situ hybridization assays showed similar alterations in the number, intensity, and distribution of labeled epithelial cells in 19 day Dex-exposed lungs and demonstrated labeling of alveolar type II and nonciliated columnar cells in adult lung. These data indicate that the accelerated lung maturation accompanying glucocorticoid exposure in utero is associated with a precocious increase in SP-D gene transcription and protein production by pulmonary epithelial cells.
胎鼠肺的生化成熟:包括表面活性剂测定的综合研究。
DOI: 10.1159/000242684
发表时间: 1987
期刊: Biology of the neonate
影响因子: --
作者:
J. Bourbon;P. Farrell;É. Doucet;D. Brown;C. Valenza
通讯作者: C. Valenza
表面活性蛋白 D。二氧化硅诱导的肺脂蛋白沉积症中积累增加。
DOI: --
发表时间: 1991
期刊: The American journal of pathology
影响因子: --
作者:
Crouch,E;Persson,A;Chang,D;Parghi,D
通讯作者: Parghi,D
原位杂交证明了叶内动脉中弹性蛋白和胶原基因表达对缺氧性肺动脉高压的区域异质性。
DOI: --
发表时间: 1989
期刊: The American journal of pathology
影响因子: --
作者:
Prosser,IW;Stenmark,KR;Suthar,M;Crouch,EC;Mecham,RP;Parks,WC
通讯作者: Parks,WC
类固醇加速胎鼠肺发育中的上皮-间质细胞相互作用。
DOI: --
发表时间: 1986
期刊: Laboratory investigation; a journal of technical methods and pathology
影响因子: --
作者:
I. Adamson;G. King
通讯作者: G. King
DOI: 10.1002/jcb.240510205
发表时间: 1993-02-01
影响因子: 4
作者:
FREEDMAN, LP;LUISI, BF
通讯作者: LUISI, BF