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Telemetric evaluation of body temperature and physical activity as predictors of mortality in a murine model of staphylococcal enterotoxic shock

机译:遥测评估体温和体育活动作为预测葡萄球菌肠毒性休克小鼠模型中死亡率的指标

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Background and Purpose: Hypothermia and death are used as experimental markers in murine models of staphylococcal enterotoxic shock. This study determined whether body temperature and physical activity, monitored telemetrically, could predict impending death and provide an earlier, more humane experimental endpoint. Methods: The study consisted of two iterations (experiments 1 and 2) to determine reproducibility of the model. Each experiment consisted of 24 BALB/c mice surgically implanted with intra-abdominal telemetry transmitters and then injected intraperitoneally with sublethal or lethal doses of staphylococcal enterotoxin B (SEB) and/or lipopolysaccharide (LPS). Core body temperature and physical activity were continuously monitored in all mice for 10 days before, and 5 days after, injections. Additionally, in experiment 2, subcutaneous temperatures were compared with core body temperatures obtained by telemetry. Results: Body temperature and physical activity were reduced in mice after administration of SEB and LPS, or LPS alone, but not SEB only. There was a significant (P < 0.05) correlation between mortality and body temperature (P = 0.0077), but not physical activity (P = 0.97). Conclusion: Body temperature proved to be an early indicator of mortality in this murine model of staphylococcal enterotoxic shock.
机译:背景与目的:在小鼠葡萄球菌肠毒性休克模型中,低温和死亡被用作实验标记。这项研究确定了通过遥测进行监测的体温和身体活动是否可以预测即将死亡,并提供了更早,更人性化的实验终点。方法:本研究包括两次迭代(实验1和2),以确定模型的可重复性。每个实验均由24只BALB / c小鼠组成,这些小鼠手术植入了腹内遥测发射器,然后腹膜内注射了致死或致死剂量的葡萄球菌肠毒素B(SEB)和/或脂多糖(LPS)。在注射前10天和注射后5天连续监测所有小鼠的核心体温和身体活动。另外,在实验2中,将皮下温度与通过遥测获得的核心体温进行了比较。结果:施用SEB和LPS或单独施用LPS后,小鼠的体温和体力活动降低,而不仅仅是SEB。死亡率和体温之间存在显着(P <0.05)相关性(P = 0.0077),而体育锻炼则无相关性(P = 0.97)。结论:在这种葡萄球菌肠毒性休克模型中,体温被证明是死亡率的早期指标。

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