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Inoue, K. et al.

Effects of 15-deoxy-Delta12,14-prostaglandin J2 on the expression of Toll-like receptor 4 and 2 in the murine lung in the presence of lipopolysaccharide.

1. Previously, we have demonstrated that 15-deoxy-Delta12,14-prostaglandin J2 (15d-PGJ2) enhances acute lung injury induced by lipopolysaccharide (LPS) in mice. The enhancement in acute lung injury by 15d-PGJ2 was concomitant with the enhanced expression of several pro-inflammatory cytokines in the lung. However, other underlying mechanisms of this enhancement remain to be elucidated. The present study investigated the effects of 15d-PGJ2 on the expression of Toll-like receptor (TLR) 4 and 2 in the lung in the absence or presence of LPS. 2. In the present study, ICR mice were divided into four experimental groups that received (intratracheally) vehicle, LPS (125 microg/kg), 15d-PGJ2 (1 mg/kg) or 15d-PGJ2 + LPS. The mRNA expression of both TLR4 and 2 in the lung was evaluated 4 h after intratracheal administration. 3. 15-Deoxy-Delta12,14-prostaglandin J2 enhanced the mRNA expression of both TLR4 and 2 in the presence of LPS. 4. These results suggest that the enhancing effects of 15d-PGJ2 on LPS-induced acute lung injury may be explained, at least in part, by its effect on the lung expression of TLR4 and 2.[1]

References

Effects of 15-deoxy-Delta12,14-prostaglandin J2 on the expression of Toll-like receptor 4 and 2 in the murine lung in the presence of lipopolysaccharide. Inoue, K., Takano, H., Yanagisawa, R., Ichinose, T., Sadakane, K., Yoshino, S., Yamaki, K., Uchiyama, K., Yoshikawa, T. Clin. Exp. Pharmacol. Physiol. (2005) [Pubmed]

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