alexa Impaired Cd14 and Cd36 expression, bacterial clearance, and Toll-like receptor 4-Myd88 signaling in caveolin-1-deleted macrophages and mice.
Pediatrics

Pediatrics

Pediatrics & Therapeutics

Author(s): Tsai TH, Chen SF, Huang TY, Tzeng CF, Chiang AS,

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Abstract An overwhelming immune response, particularly from macrophages, with gram-negative bacteria-induced sepsis plays a critical role in survival of and organ damage in infected patients. Caveolin-1 (Cav-1), a major structure protein of caveolae, regulates many cellular functions. We examined the vital role of Cav-1 in the response of macrophages and mice to bacteria or LPS exposure. Deletion of Cav-1 decreased the expression of CD14 and CD36 during macrophage differentiation and suppressed their phagocytotic ability. As well, the ability to kill bacteria was inhibited in Cav-1 macrophages and mice peritoneal cavity, tissue, and plasma, which was partly attributed to hindered expression of iNOS induced by bacteria or LPS. Furthermore, deletion of Cav-1 attenuated the expression of Toll-like receptor 4 and myeloid differentiation factor 88 and the activation of nuclear factor κB, all of which impeded the production of inflammatory cytokines in response to bacterial exposure in Cav-1 macrophages and mice. Thus, Cav-1 participates in the regulation of CD14, CD36, Toll-like receptor 4 and myeloid differentiation factor 88 protein expression and is crucial for the immune response of macrophages to bacterial infection. Cav-1 may be a therapeutic target in the treatment of sepsis. This article was published in Shock and referenced in Pediatrics & Therapeutics

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