This study investigated the effects of propofol on the mRNA expression of Toll-like receptor-4 (TLR4) in BV-2 cells during mimic ischemia-reperfusion (I/R) injury in vitro. BV-2 cells, a mouse microglia line, were...This study investigated the effects of propofol on the mRNA expression of Toll-like receptor-4 (TLR4) in BV-2 cells during mimic ischemia-reperfusion (I/R) injury in vitro. BV-2 cells, a mouse microglia line, were cultured and divided into 4 groups at random: control group (group C), ischemia/reperfusion group (group I/R), low-dose propofol (25 μmol/L) intervention group (group PF25) and high-dose propofol (100 μmol/L) intervention group (group PF100). The mRNA expression of TLR4 and NF-κB was measured by means of RT-PCR. TNF-α levels in the supernatants of BV-2 cells were detected by ELISA. The results showed that the mRNA expression of TLR4 and NF-κB was significantly higher in groups I/R, PF25 and PF100 than in group C (P〈0.01). And the TNF-α level in the supernatants was elevated in groups I/R, PF25 and PF100 as compared with that in group C (P〈0.01). After pre-treatment with propofol, the mRNA expressions of TLR4 and NF-κB and the TNF-α level were significantly decreased in groups PF25 and PF100 in comparison to those in group I/R (P〈0.01). And the decrease in those indicators was more significant in group PF100 than in group PF25 (P〈0.01). It was concluded that propofol exerted brain-protecting effects during I/R injury by suppressing the mRNA expressions of TLR4 and NF-κB and deceasing the TNF-α level.展开更多
Objective: To investigate whether remifentanil induced cardioprotecting effect is associated with expression of toll-like receptor 4 (TLR4), nuclear factor rB (NF-r.B) and serum interleukin -6 (IL-6). Methods:...Objective: To investigate whether remifentanil induced cardioprotecting effect is associated with expression of toll-like receptor 4 (TLR4), nuclear factor rB (NF-r.B) and serum interleukin -6 (IL-6). Methods: Fifty rabbits were randomly divided into 5 groups (n=10) according to the treatment: sham operation group (group A), ischemla-reperfusion group (group B), low-dose remifentanil group (group C), mediate-dose remifentanil group (group D), and high-dose remlfentanil group (group E) Myocardial TLR4 mRNA levels, NF-r.B protein expression and serum levels of IL-6 were observed in 120 min after reperfusion. Results: The myocardial expressions of TLR4 mRNA, NF-rd3 protein and IL-6 level in sera of groups B, C, D and E were elevated compared with group A. However, remifentanil significantly reduced the levels of TLR4 mRNA, NF- r.B protein expression and serum IL-6 in groups C, D and E compared with group B. There were remarkable differences between the groups (P〈O.O1). Conclusion: Intravenous remifentanil has protective effect against rabbit myocardial ischemia/reperfusion injury. This effect may be associated with TLR4, NF-r.B expressions on myocytes and serum level of IL-6 in a dose-dependent manner展开更多
文摘This study investigated the effects of propofol on the mRNA expression of Toll-like receptor-4 (TLR4) in BV-2 cells during mimic ischemia-reperfusion (I/R) injury in vitro. BV-2 cells, a mouse microglia line, were cultured and divided into 4 groups at random: control group (group C), ischemia/reperfusion group (group I/R), low-dose propofol (25 μmol/L) intervention group (group PF25) and high-dose propofol (100 μmol/L) intervention group (group PF100). The mRNA expression of TLR4 and NF-κB was measured by means of RT-PCR. TNF-α levels in the supernatants of BV-2 cells were detected by ELISA. The results showed that the mRNA expression of TLR4 and NF-κB was significantly higher in groups I/R, PF25 and PF100 than in group C (P〈0.01). And the TNF-α level in the supernatants was elevated in groups I/R, PF25 and PF100 as compared with that in group C (P〈0.01). After pre-treatment with propofol, the mRNA expressions of TLR4 and NF-κB and the TNF-α level were significantly decreased in groups PF25 and PF100 in comparison to those in group I/R (P〈0.01). And the decrease in those indicators was more significant in group PF100 than in group PF25 (P〈0.01). It was concluded that propofol exerted brain-protecting effects during I/R injury by suppressing the mRNA expressions of TLR4 and NF-κB and deceasing the TNF-α level.
基金Supported by Shaanxi Provincial Scientific and Technological Research Projects (2008K13-02)
文摘Objective: To investigate whether remifentanil induced cardioprotecting effect is associated with expression of toll-like receptor 4 (TLR4), nuclear factor rB (NF-r.B) and serum interleukin -6 (IL-6). Methods: Fifty rabbits were randomly divided into 5 groups (n=10) according to the treatment: sham operation group (group A), ischemla-reperfusion group (group B), low-dose remifentanil group (group C), mediate-dose remifentanil group (group D), and high-dose remlfentanil group (group E) Myocardial TLR4 mRNA levels, NF-r.B protein expression and serum levels of IL-6 were observed in 120 min after reperfusion. Results: The myocardial expressions of TLR4 mRNA, NF-rd3 protein and IL-6 level in sera of groups B, C, D and E were elevated compared with group A. However, remifentanil significantly reduced the levels of TLR4 mRNA, NF- r.B protein expression and serum IL-6 in groups C, D and E compared with group B. There were remarkable differences between the groups (P〈O.O1). Conclusion: Intravenous remifentanil has protective effect against rabbit myocardial ischemia/reperfusion injury. This effect may be associated with TLR4, NF-r.B expressions on myocytes and serum level of IL-6 in a dose-dependent manner