Summary： This study preliminarily investigated the mechanism by which chloroquine （CQ） relieves acute lung injury （ALI） complicated in acute hemorrhagic necrotizing pancreatitis （AHNP）. Sixty male Wistar rats w...Summary： This study preliminarily investigated the mechanism by which chloroquine （CQ） relieves acute lung injury （ALI） complicated in acute hemorrhagic necrotizing pancreatitis （AHNP）. Sixty male Wistar rats were randomized into sham-operated group （group A, n=10）, AHNP group （group B, n=10）, L-arginine-treated group （group C, n=10）, L-N-nitro-L-arginine methyl ester （NAME）-treated group （group D, n=10）, CQ-treated group （group E, n=10） and CQ＋L-NAME-treated group （group F, n=10）. TLR4 expression was measured by using real time-PCR and Western blotting respectively. The results showed that, in the group B, the expression of TLR4 and the levels of TNF-α and IL-6 in the lungs were significantly increased, and the nitric oxide （NO） concentration was reduced, as compared with those in the group A （P〈0.05 or P〈0.01）. Lung injury was aggravated with the increased expression of TLR4. When the inhibitor and stimulator of TLR4, namely L-Arg and L-NAME, were added respectively, lung injury was correspondingly relieved or aggravated （P〈0.05 or P〈0.01）. In the group E, TLR4 expres- sion was substantially lower and NO concentration higher than those in the group B （P〈0.05 or P〈0.01）. However, in the group F, NO concentration was markedly decreased, and the inhibitory effect of CQ on TLR4 expression and the relief of lung injury were weakened when compared with those in the group E （P〈0.05 or P〈0.01）. It was concluded that TLR4 may play an important role in the pathogenesis and development of ALl complicated in AHNP. CQ could relieve ALl by decreasing the TLR4 expression and increasing the NO release.展开更多
目的:探讨羊膜腔内注射肺表面活性物质(PS)对宫内感染致肺损伤胎兔的肺组织转化生长因子β1(TGF-β1)表达的影响。方法:选取健康成年育龄日本大耳白兔19只,成功受孕后随机分为对照组、细菌组、细菌+PS组,建立宫内感染模型。对照组和细...目的:探讨羊膜腔内注射肺表面活性物质(PS)对宫内感染致肺损伤胎兔的肺组织转化生长因子β1(TGF-β1)表达的影响。方法:选取健康成年育龄日本大耳白兔19只,成功受孕后随机分为对照组、细菌组、细菌+PS组,建立宫内感染模型。对照组和细菌组按胎龄又分为21、22、23、24、26 d 5个亚组,细菌+PS组分为24、26 d 2个亚组。细菌组宫内注射E.coli菌株,细菌+PS组宫内注射E.coli菌株的同时羊膜腔内注射PS200 mg/kg,对照组宫内注射生理盐水。模型建成后分别在各时相点取胎兔肺组织,免疫组织化学法检测肺组织内TGF-β1表达;RT-PCR检测TGF-β1mRNA表达;Western blotting法检测TGF-β1蛋白表达。结果:对照组TGF-β1蛋白在支气管上皮或血管内皮细胞及其周围的结缔组织有阳性表达,细菌组、细菌+PS组TGF-β1阳性蛋白表达量增加,与对照组比较,差异有统计学意义(P<0.05)。TGF-β1mRNA、蛋白表达在细菌感染后明显上调,3组比较,差异有显著统计学意义(F=631.109、183.980,P=0.000)。结论:宫内感染后胎肺TGF-β1高表达是肺损伤的高危因素。羊膜腔内注射PS可使TGF-β1表达下降,对减轻肺损伤、促进肺发育具有积极作用。展开更多
基金supported by the National Natural Science Foundation of China (No. 81201554)
文摘Summary： This study preliminarily investigated the mechanism by which chloroquine （CQ） relieves acute lung injury （ALI） complicated in acute hemorrhagic necrotizing pancreatitis （AHNP）. Sixty male Wistar rats were randomized into sham-operated group （group A, n=10）, AHNP group （group B, n=10）, L-arginine-treated group （group C, n=10）, L-N-nitro-L-arginine methyl ester （NAME）-treated group （group D, n=10）, CQ-treated group （group E, n=10） and CQ＋L-NAME-treated group （group F, n=10）. TLR4 expression was measured by using real time-PCR and Western blotting respectively. The results showed that, in the group B, the expression of TLR4 and the levels of TNF-α and IL-6 in the lungs were significantly increased, and the nitric oxide （NO） concentration was reduced, as compared with those in the group A （P〈0.05 or P〈0.01）. Lung injury was aggravated with the increased expression of TLR4. When the inhibitor and stimulator of TLR4, namely L-Arg and L-NAME, were added respectively, lung injury was correspondingly relieved or aggravated （P〈0.05 or P〈0.01）. In the group E, TLR4 expres- sion was substantially lower and NO concentration higher than those in the group B （P〈0.05 or P〈0.01）. However, in the group F, NO concentration was markedly decreased, and the inhibitory effect of CQ on TLR4 expression and the relief of lung injury were weakened when compared with those in the group E （P〈0.05 or P〈0.01）. It was concluded that TLR4 may play an important role in the pathogenesis and development of ALl complicated in AHNP. CQ could relieve ALl by decreasing the TLR4 expression and increasing the NO release.
文摘目的:探讨羊膜腔内注射肺表面活性物质(PS)对宫内感染致肺损伤胎兔的肺组织转化生长因子β1(TGF-β1)表达的影响。方法:选取健康成年育龄日本大耳白兔19只,成功受孕后随机分为对照组、细菌组、细菌+PS组,建立宫内感染模型。对照组和细菌组按胎龄又分为21、22、23、24、26 d 5个亚组,细菌+PS组分为24、26 d 2个亚组。细菌组宫内注射E.coli菌株,细菌+PS组宫内注射E.coli菌株的同时羊膜腔内注射PS200 mg/kg,对照组宫内注射生理盐水。模型建成后分别在各时相点取胎兔肺组织,免疫组织化学法检测肺组织内TGF-β1表达;RT-PCR检测TGF-β1mRNA表达;Western blotting法检测TGF-β1蛋白表达。结果:对照组TGF-β1蛋白在支气管上皮或血管内皮细胞及其周围的结缔组织有阳性表达,细菌组、细菌+PS组TGF-β1阳性蛋白表达量增加,与对照组比较,差异有统计学意义(P<0.05)。TGF-β1mRNA、蛋白表达在细菌感染后明显上调,3组比较,差异有显著统计学意义(F=631.109、183.980,P=0.000)。结论:宫内感染后胎肺TGF-β1高表达是肺损伤的高危因素。羊膜腔内注射PS可使TGF-β1表达下降,对减轻肺损伤、促进肺发育具有积极作用。
