Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6020177 | Journal of Neuroimmunology | 2015 | 5 Pages |
Abstract
This study tested the hypothesis that lipopolysaccharide (LPS) lowers arterial pressure through two different mechanisms depending on the dose. Previously, we found that a low hypotensive dose of LPS (1Â mg/kg) lowers arterial pressure by activating vagus nerve afferents. Here we report that hypotension evoked by high dose LPS (15Â mg/kg) can be prevented by injecting lidocaine into the OVLT but not by vagotomy or inactivation of the NTS. The hypotension produced by both LPS doses was correlated with elevated extracellular norepinephrine concentrations in the POA and prevented by blocking alpha-adrenergic receptors. Thus, initiation of endotoxic hypotension is dose-related, mechanistically.
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Authors
Carlos Feleder, M. Sertac Yilmaz, Jianya Peng, Gökhan Göktalay, William R. Millington,