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Regulation of prostaglandin generation in carrageenan-induced pleurisy by inducible nitric oxide synthase in knockout mice.

机译:敲除小鼠中诱导型一氧化氮合酶对角叉菜胶诱导的胸膜炎中前列腺素生成的调节。

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In the present study, by comparing the responses in wild-type mice (iNOSWT) and mice lacking (iNOSKO) the inducible (or type 2) nitric oxide synthase (iNOS), we investigated the correlation between endogenous nitric oxide (NO) and prostaglandin (PG) generation in carrageenan-induced pleurisy. The inflammatory response in iNOSKO mice was significantly reduced in respect to iNOSWT animals, as demonstrated by the exudate volume (-63%) and numbers of infiltrating cells (-62%). The levels of NOx in the pleural exudate from carrageenan-treated mice were significantly (p < 0.01) decreased in iNOSKO mice (16 +/- 7.6 nmoles/mice) compared to iNOSWT animals (133 +/- 9 nmoles/mice). Similarly, the amounts of PGE2 in the pleural exudates of carrageenan-treated animals were significantly (p < 0.01) lower in iNOSKO compared to iNOSWT mice (120 +/- 20 pg/mice vs. 308 +/- 51 pg/mice). Also the amounts of 6-keto-PGF(1 alpha) produced by lungs from carrageenan-treated iNOSKO mice (1.01 +/- 0.10 ng/tissue mg) were significantly (p < 0.01) reduced compared to iNOSWT carrageenan-treated mice (2.1 +/- 0.09 ng/tissue mg). In conclusion our results confirm, by the use of iNOSKO mice that in carrageenan-induced pleurisy NO positively modulates PG biosynthesis.
机译:在本研究中,通过比较野生型小鼠(iNOSWT)和缺乏型小鼠(iNOSKO)诱导型(或2型)一氧化氮合酶(iNOS)的应答,我们研究了内源性一氧化氮(NO)与前列腺素之间的相关性(PG)在角叉菜胶诱发的胸膜炎中的产生。相对于iNOSWT动物,iNOSKO小鼠的炎症反应显着降低,如渗出液体积(-63%)和浸润细胞数(-62%)所示。与iNOSWT动物(133 +/- 9 nmole /小鼠)相比,iNOSKO小鼠(16 +/- 7.6 nmoles /小鼠)的角叉菜胶处理小鼠胸膜渗出液中NOx含量显着降低(p <0.01)。同样,与iNOSWT小鼠相比,经角叉菜胶处理的动物胸膜渗出物中的PGE2量显着降低(p <0.01)(120 +/- 20 pg /小鼠vs. 308 +/- 51 pg /小鼠)。与iNOSWT角叉菜胶治疗的小鼠(2.1 +/- 0.09 ng /组织mg)。总之,我们的结果证实,通过使用iNOSKO小鼠,在角叉菜胶诱导的胸膜炎中,NO可以正向调节PG的生物合成。

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