Objective:To investigate the significance of toll receptor-9(TLR-9)expression in rats with acute lung injury(ALI)induced by thoracic trauma.Methods:Fifty healthy male SD rats were selected for the study,and 40 of them...Objective:To investigate the significance of toll receptor-9(TLR-9)expression in rats with acute lung injury(ALI)induced by thoracic trauma.Methods:Fifty healthy male SD rats were selected for the study,and 40 of them were randomly selected to establish the acute lung injury model induced by thoracic trauma,and 8 rats were randomly selected at 5,24,48 and 72 h after the impact,which were killed by cervical dislocation after arterial bleeding,and the lung tissue sections were made.Randomly select 8 rats from the remaining 10 rats as the control group,take blood and kill them to make lung tissue sections for reference.The lung dry/wet weight ratio(W/D)of the five groups were compared,and the levels of TLR-9 in bronchoalveolar lavage fluid(BALF)and serum,and the levels of TLR-9 mR NA,IL-6 mR NA,TLR-9 protein and IL-6protein in lung tissue were detected.Results:There was no significant difference in W/D levels among the control group,experimental group 1 and experimental group 4(P>0.05),while the W/D level of experimental group 3 was higher than that of the other four groups,and the W/D level of experimental group 2 was higher than that of the control group(P<0.05).The levels of ILR-9 in serum and BALF of rats in experimental group 1,experimental group 2 and experimental group 4 had no significant difference(P>0.05),which were higher than those in control group and lower than those in experimental group 3(P<0.05).The levels of TLR-9 mR NA,IL-6 mR NA,TLR-9 protein and IL-6 protein were the highest in the experimental group 3,and the lowest in the control group(P<0.05).The levels of TLR-9 mR NA and IL-6 mR NA in lung tissue of rats in experimental group 1,experimental group 2 and experimental group 4 had no significant difference(P>0.05).There was no significant difference in the levels of TLR-9 protein and IL-6 protein between experimental group 2 and experimental group 4(P>0.05),which were higher than those in experimental group 1(P<0.05).Conclusion:The expression level of TLR-9 is significantly increased in rats after thoracic trauma,and the expression of TLR-9 can reflect the degree of lung injury in rats after trauma to a certain extent,which is inferred to be related to the inflammatory response after lung injury.展开更多
文摘Objective:To investigate the significance of toll receptor-9(TLR-9)expression in rats with acute lung injury(ALI)induced by thoracic trauma.Methods:Fifty healthy male SD rats were selected for the study,and 40 of them were randomly selected to establish the acute lung injury model induced by thoracic trauma,and 8 rats were randomly selected at 5,24,48 and 72 h after the impact,which were killed by cervical dislocation after arterial bleeding,and the lung tissue sections were made.Randomly select 8 rats from the remaining 10 rats as the control group,take blood and kill them to make lung tissue sections for reference.The lung dry/wet weight ratio(W/D)of the five groups were compared,and the levels of TLR-9 in bronchoalveolar lavage fluid(BALF)and serum,and the levels of TLR-9 mR NA,IL-6 mR NA,TLR-9 protein and IL-6protein in lung tissue were detected.Results:There was no significant difference in W/D levels among the control group,experimental group 1 and experimental group 4(P>0.05),while the W/D level of experimental group 3 was higher than that of the other four groups,and the W/D level of experimental group 2 was higher than that of the control group(P<0.05).The levels of ILR-9 in serum and BALF of rats in experimental group 1,experimental group 2 and experimental group 4 had no significant difference(P>0.05),which were higher than those in control group and lower than those in experimental group 3(P<0.05).The levels of TLR-9 mR NA,IL-6 mR NA,TLR-9 protein and IL-6 protein were the highest in the experimental group 3,and the lowest in the control group(P<0.05).The levels of TLR-9 mR NA and IL-6 mR NA in lung tissue of rats in experimental group 1,experimental group 2 and experimental group 4 had no significant difference(P>0.05).There was no significant difference in the levels of TLR-9 protein and IL-6 protein between experimental group 2 and experimental group 4(P>0.05),which were higher than those in experimental group 1(P<0.05).Conclusion:The expression level of TLR-9 is significantly increased in rats after thoracic trauma,and the expression of TLR-9 can reflect the degree of lung injury in rats after trauma to a certain extent,which is inferred to be related to the inflammatory response after lung injury.