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- W2082873584 abstract "It is well documented that the Toll-like receptor 4 (TLR4)/NF-κB signaling mediates early inflammation during myocardial ischemia and reperfusion. Our previous study has demonstrated that κ-opioid receptor stimulation with U50,488H produces cardioprotective and anti-inflammatory effects. The aim of the present study was to investigate whether κ-opioid receptor stimulation could modulate the TLR4/NF-κB signaling and reduce neutrophil accumulation and TNF-α induction in an ischemia–reperfusion injured rat heart model. Rats were randomly exposed to sham operation, myocardial ischemia and reperfusion (MI/R), and MI/R + U50,488H in the absence or presence of Nor-BNI, a selective κ-opioid receptor antagonist. The results demonstrated that after MI/R, the expressions of myocardial TLR4 and NF-κB increased significantly both in ischemia area and risking area. Compared with MI/R, κ-opioid receptor stimulation with U50,488H significantly attenuated the expressions of TLR4 and NF-κB. At the mean time, it also reduced myeloperoxidase (MPO) levels, both serum and myocardial TNF-α production, myocardial infarct sizes (INF/AAR%) and myocardial apoptosis induced by MI/R, all the effects of U50,488H were abolished by Nor-BNI. These data provide evidence for the first time that κ-opioid receptor stimulation inhibits TLR4/NF-κB signaling in the rat heart subjected to MI/R." @default.
- W2082873584 created "2016-06-24" @default.
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- W2082873584 date "2013-03-01" @default.
- W2082873584 modified "2023-09-24" @default.
- W2082873584 title "κ-Opioid receptor stimulation modulates TLR4/NF-κB signaling in the rat heart subjected to ischemia–reperfusion" @default.
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- W2082873584 doi "https://doi.org/10.1016/j.cyto.2013.01.002" @default.
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