Differential effects of halothane and thiopental on surfactant protein C messenger RNA in vivo and in vitro in rats.

Differential effects of halothane and thiopental on surfactant protein C messenger RNA in vivo and in vitro in rats.
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氟烷和硫喷妥钠对大鼠体内和体外表面活性蛋白 C 信使 RNA 的不同影响。

DOI:
10.1097/00000542-200009000-00030
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发表时间:
2000
期刊:
影响因子:
8.8
通讯作者:
B. Crestani
B. Crestani
中科院分区:
医学1区
文献类型:
--
作者:
Catherine Paugam;Serge Molliex;Bernard Lardeux;Corinne Rolland;Michel Aubier;J. Desmonts;B. Crestani

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背景 肺表面活性物质是由肺泡II型细胞合成的蛋白质和磷脂的复杂混合物。挥发性麻醉剂已被证明可以减少大鼠肺泡II型细胞表面活性剂磷脂的生物合成。肺泡表面活性物质相关蛋白C(SP-C)是肺泡表面活性物质功能的关键。我们的目标是评估氟烷和硫喷妥钠对SP-C信使RNA(mRNA)表达的影响在体外大鼠肺泡II型细胞和在体内机械通气大鼠。 方法 在体外,新鲜分离的肺泡II型细胞暴露于氟烷在4小时(1,2,4%)和8小时(1%),并硫喷妥钠在4小时(10,100微米)和8小时(100微米)。在体实验中,大鼠腹腔注射硫喷妥钠或吸入1%氟烷麻醉,机械通气4或8h。核糖核酸酶保护法检测SP-C mRNA的表达。 结果 在体外,肺泡II型细胞4小时暴露于硫喷妥钠10和100微米增加他们的SP-C mRNA的含量,分别为145和197%的控制值。在肺泡II型细胞暴露4小时,氟烷1,2,和4%,SP-C mRNA含量增加剂量依赖性的160,235,和275%,分别为对照值。在体内,在机械通气大鼠,4小时的氟烷麻醉降低肺SP-C mRNA含量的53%,在控制(非麻醉,非通气)动物获得的值;硫喷妥钠麻醉增加到150%肺SP-C mRNA含量。 结论 这些结果表明,氟烷和硫喷妥钠在临床相关浓度使用调节大鼠肺SP-C mRNA的含量。在体内,建议机械通气的附加作用。
BACKGROUND Pulmonary surfactant is a complex mixture of proteins and phospholipids synthetized by alveolar type II cells. Volatile anesthetics have been shown to reduce surfactant phospholipid biosynthesis by rat alveolar type II cells. Surfactant-associated protein C (SP-C) is critical for the alveolar surfactant functions. Our goal was to evaluate the effects of halothane and thiopental on SP-C messenger RNA (mRNA) expression in vitro in rat alveolar type II cells and in vivo in mechanically ventilated rats. METHODS In vitro, freshly isolated alveolar type II cells were exposed to halothane during 4 h (1, 2, 4%) and 8 h (1%), and to thiopental during 4 h (10, 100 micrometer) and 8 h (100 micrometer). In vivo, rats were anesthetized with intraperitoneal thiopental or inhaled 1% halothane and mechanically ventilated for 4 or 8 h. SP-C mRNA expression was evaluated by ribonuclease protection assay. RESULTS In vitro, 4-h exposure of alveolar type II cells to thiopental 10 and 100 micrometer increased their SP-C mRNA content to 145 and 197%, respectively, of the control values. In alveolar type II cells exposed for 4 h to halothane 1, 2, and 4%, the SP-C mRNA content increased dose-dependently to 160, 235, and 275%, respectively, of the control values. In vivo, in mechanically ventilated rats, 4 h of halothane anesthesia decreased the lung SP-C mRNA content to 53% of the value obtained in control (nonanesthetized, nonventilated) animals; thiopental anesthesia increased to 150% the lung SP-C mRNA content. CONCLUSIONS These findings indicate that halothane and thiopental used at clinically relevant concentrations modulate the pulmonary SP-C mRNA content in rats. In vivo, the additive role of mechanical ventilation is suggested.
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DOI: 10.1152/ajplung.1998.274.2.l196
发表时间: 1998-02-01
影响因子: 4.9
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