摘要
目的 在大鼠肢体缺血再灌注 (LIR)损伤模型上 ,研究内源性一氧化氮 (NO)在IR后肺损伤发生中的作用 ,观察牛磺酸对NO的影响 ,探讨牛磺酸防治LIR后肺损伤的机制。方法 Wistar大鼠随机分为 3组 ,即 :对照组 (control)、缺血再灌注组 (IR)、牛磺酸 +缺血再灌注组 (Tau +IR) ,分别测定动脉血氧分压 (PaO2 )和二氧化碳分压 (PaCO2 ) ,肺系数 (LI)和肺通透指数 (LPI) ,肺组织一氧化氮合酶 (NOS)活性、牛磺酸 (taurine)含量及血浆、肺组织丙二醛 (MDA)、NO和内皮素 (ET)含量 ,并用免疫组织化学方法观察各组动物肺组织NOS表达的变化。结果 牛磺酸可明显改善LIR后肺呼吸功能 ,减轻肺水肿的发生 ;降低血浆和肺组织ET的含量 ,提高血浆及肺组织NO含量 ,促进NOS的表达。结论 外源性牛磺酸可减轻LIR后肺损伤的发生 ,其机制之一与增加内源性NO含量和减少ET水平有关。
AIM To evaluate the possible role of endogenous nitric oxide (NO) in the development of lung injury after hind limbs ischemia reperfusion (LIR), and the effect of taurine on endogenous NO on the model of lung injury following LIR. METHODS Wistar rats were divided into three groups: control group, ischemia reperfusion group (IR) and taurine+IR (Tau+IR). The changes of PaO 2 ,PaCO 2,lung index (LI) and lung permeability index (LPI) were observed. The content of malondialdehyde (MDA), NO and endothelin (ET) in both plasma and the lung as well as the content of nitric oxide synthase (NOS) and taurine in the lung were detected. The immunohistochemical method was used to detect level in the expression of NOS protein. RESULTS Taurine improved the pulmonary respiratory following LIR significantly, lightened lung edema, decreased the content of ET in both plasma and lung tissue, increased the content of NO in both plasma and lung tissue and promoted the level in the expression of NOS protein. CONCLUSION Using taurine may lighten lung injury following LIR and this protective effect may due to increasing the content of endogeneous NO and decreasing the level of ET.
出处
《中国药理学通报》
CAS
CSCD
北大核心
2003年第9期1051-1054,共4页
Chinese Pharmacological Bulletin
基金
河北省教育厅科研基金资助 No 990 117
