RESUMO
The general Shwartzman reactions of rabbits were induced by intravenously injecting endotoxin twice with 24 hours interval. The lipid peroxides (LPO) in sera and liver homogenates of rabbits in normal saline group (12.26 +/- 0.84 n mol MDA/ml, 1.86 +/- 0.43 n mol MDA/mg protein respectively) were significantly higher than those of rabbits in normal control group (7.93 +/- 2.90, 1.31 +/- 0.22, both P less than 0.01), and LPO in sera and liver homogenates of rabbits in Re-Du-Qing group (6.55 +/- 2.97, 1.19 +/- 0.12) were evidently lower than those of rabbits in normal saline group (P less than 0.01), accessed to the LPO level of rabbits in normal control group. In in vitro experiment, LPO of mitochondria in Re-Du-Qing group (1.50 +/- 0.43 n mol MDA/mg protein) dramatically decreased, compared with that of endotoxin group (2.39 +/- 0.69, P less than 0.05) and of control group (2.23 +/- 0.75, P less than 0.05). The findings of both in vivo and in vitro experiments showed that Re-Du-Qing possesses scavenging effect on free radicals. In view of the detoxification mechanism of Re-Du-Qing, in addition to inhibiting bacteria and degrading. endotoxin, the scavenging effect of Re-Du-Qing on free radicals are also included.
Assuntos
Medicamentos de Ervas Chinesas/farmacologia , Sequestradores de Radicais Livres , Fenômeno de Shwartzman/tratamento farmacológico , Animais , Medicamentos de Ervas Chinesas/uso terapêutico , Endotoxinas , Escherichia coli , Feminino , Peróxidos Lipídicos/metabolismo , Masculino , Mitocôndrias Hepáticas/metabolismo , Coelhos , Ratos , Ratos Endogâmicos , Fenômeno de Shwartzman/etiologiaRESUMO
To observe the effect of Re-Du-Qing on the toxic effect of endotoxin, the rabbit model of general Shwartzman reaction was made by injection of endotoxin into ear vein and the H(+)-ATP synthase activities of rabbit liver mitochondria were measured. The results showed that the H(+)-ATP synthase activity of endotoxin group was significantly lower than that of the normal group and group which had been simultaneously injected Re-Du-Qing (P less than 0.05). The level of H(+)-ATP synthase activity was almost raised to normal value, when Re-Du-Qing or dexamethasone was injected simultaneously with endotoxin respectively. It suggested that Re-Du-Qing was able to alleviate the nocuous effect of endotoxin on H(+)-ATP synthase activity in the mitochondria of rabbit liver cells.
