| First Author | Benhamou Y | Year | 2009 |
| Journal | Crit Care Med | Volume | 37 |
| Issue | 5 | Pages | 1724-8 |
| PubMed ID | 19325486 | Mgi Jnum | J:346602 |
| Mgi Id | MGI:7617168 | Doi | 10.1097/CCM.0b013e31819da805 |
| Citation | Benhamou Y, et al. (2009) Toll-like receptors 4 contribute to endothelial injury and inflammation in hemorrhagic shock in mice. Crit Care Med 37(5):1724-8 |
| abstractText | OBJECTIVE: Hemorrhagic shock followed by resuscitation (HS/R) promotes organ injury by priming cells of the innate immune system for inflammatory response. Toll-like receptors (TLRs) play an important role in signal transduction in shock/resuscitation conditions. Because proinflammatory mediators are a critical event in mesenteric endothelial injury induced by HS/R, we assessed the role of TLR4 or TLR2 in this setting. DESIGN: Laboratory investigation. SETTING: Research laboratory at Rouen University Medical School. SUBJECTS: Male wild-type, TLR4(-/-) and TLR2(-/-) mice with the same C57BL/6 background. INTERVENTIONS: Mice were submitted to 30 minutes hemorrhagic shock followed by 1 hour resuscitation, after which mesenteric endothelial dysfunction, microvascular injury, and TNF[alpha] production were assessed. MEASUREMENTS AND MAIN RESULTS: HS/R markedly decreased nitric oxide-mediated mesenteric relaxations induced by acetylcholine, assessed ex vivo on a myograph. By contrast, in TLR4-deficient mice, HS/R did not impair the nitric oxide-mediated responses to acetylcholine. No protection was observed in TLR2-deficient mice. TLR4-deficient mice also displayed a significant reduction in fluid resuscitation and TNF[alpha] systemic production. CONCLUSIONS: TLR4 contributes to mesenteric endothelial dysfunction after hemorrhagic shock. This early TLR4-induced vascular injury may be an important trigger of the systemic inflammatory response occurring in this disease. |
