高压氧对大鼠急性脊髓损伤炎症因子表达的影响

Objective To investigate the effects of early HBO therapy on the expressions of pro inflammatory cytokine mRNA including tumor necrosis factor-α (TNF-α ) and interleukin-10 (IL-10) following spinal cord injury (SCI) in rats. Methods Forty SD rats were randomly divided into 3 groups:the sham operation group (n=4) , the SCI group (n = 18) , and the hyperbaric oxygen group (n = 18). Spinal cord injury model was developed by using the modified Allen impact. Then, the SCI group and the HBO group received HBO therapy 2 hours after injury, once a day. And 3 rats were randomly selected at 6, 12, 24, 72, 120 and 168 h following injury to take samples of injured spinal cord tissue and measure dynamic changes in the expressions of TNF-α, IL-10 mRNA by semi-quantitative RT-PCR method. Results Faint expression of the cytokine mRNA could be noticed in the sham group. The expression of TNF-α mRNA in the injured spinal cord tissue in the SCI group elevated gradually, increased obviously at 12 h after injury and reached peak at 24 h, and its high expression maintained till 72 h after injury. The tendency in the expression of TNF-α mRNA in the HBO group was identical to that of the SCI group, however, the amplitude in the increase of TNF-α mRNA decreased (P＜0. 05). The expression of IL-10 mRNA in the SCI group began to increase at 12 h after injury and increased gradually over time and reached peak at 168 h. The expressions of both TNF-α and IL-10 mRNA were more consistent in the HBO group, with more obvious increase in the expressions of IL-10 mRNA. Conclusions HBO could reduce the release of pro-inflammatory cytokines and increase the expression of anti-inflammatory cytokines,resulting in reduction of secondary spinal cord injury,protection of the damaged nerve cells and promotion of recovery.     

促红细胞生成素及其受体在大鼠创伤性颅脑损伤模型中的表达及意义

目的 研究创伤性颅脑损伤(TBI)大鼠损伤周围脑组织促红细胞生成素(erythropoietin,EPO)及其受体(erythropoietin receptor,EPOR)的表达.方法 78只SD大鼠按随机数字表法分为对照组(6只)、假手术组(36只)、液压冲击脑创伤模型组(36只).根据处死时间,分为6,24 h和3,5,7,14 d6个时相点,每个时相点假手术组和脑损伤组各处死6只大鼠,取损伤周围脑组织.利用实时荧光定量PCR和Western blot方法检测EPO、EPOR的mRNA表达和蛋白表达.结果 EPO在伤后24 h内即升高,到第3天达到高峰,并可维持2 d左右,至伤后第7天开始下降,于伤后14 d基本恢复至伤前水平;而EPOR于伤后24 h到达高峰,至伤后14 d表达量仍可维持较高的水平.结论 TBI后24 h内源性EPO及其受体的表达即开始增加,但二者的表达具有不一致性,且EPO相对受体表达具有短暂性.

Abstract：

Objective To study the expressions of erythmpoietin(EPO)and its receptors(EPOR)in the injured brain tissue ofthe rats with traumatic brain injury(TBI).Methods A total of78 SD rats were randomly divided into three groups including control group(six rats),sham group(36rats) and fluid percussion injury group(36 rats).The rats were sacrificed at 6,24 hours,3,5,7 and 14days after TBI in the sham group and the fluid percussion injury group(six rats at each time point).Then,the injured brain tissues were removed for observation of the mRNA and protein expressions of EPO and EPOR by meaDiB of real-time PCR and Western blot. Results The expression of EPO was increased at 24 hours and reached the peak at day 3 after TBI.The hish expression level of EPO could maintain for two days or so.began to decrease at day 7 and recovered to normal at day 14 after Till.While the expression of EPOR reached the peak at 24 hours after TBI and maintained hish level at day14. Conclusions The expressions of EPO and EPOR show increase within 24 hours after TBI.In fact,the expressions of both factors are not in consistency,with more transient expression of EPO.     

高压氧对大鼠急性脊髓损伤炎症因子表达的影响

目的 观察大鼠脊髓损伤(spinal cord injury,SCI)后早期高压氧(HBO)治疗对肿瘤坏死因子-α(TNF-α)、白细胞介素-10(IL-10)mRNA表达的影响.方法 将36只SD大鼠随机分为2组:SCI组(18只)和HBO组(18只).2组均采用改良的Allen打击法建造大鼠脊髓损伤模型.模型建造成功后,HBO组于损伤2 h后开始行HBO治疗,1次/d.2组分别于损伤后6、12、24、72、120、168 h各取3只大鼠,取损伤部位脊髓组织采用逆转录-聚合酶链式反应(RT-PCR)法测定其中TNF-α、IL-10 mRNA表达的变化.结果 SCI组大鼠脊髓组织中TNF-α mRNA表达逐渐升高,在伤后12h表达明显上调,至24h达高峰,高表达持续至损伤后72 h;HBO组大鼠脊髓组织中TNF-α mRNA表达变化趋势与SCI组一致,但升高幅度降低(P＜0.05);SCI组大鼠IL-10 mRNA表达在损伤后12 h开始升高,并随时间的推移逐渐升高,至168 h达高峰;HBO组表达变化趋势较一致,IL-10 mRNA升高幅度更明显(P＜0.05).结论 HBO能够减少前炎性细胞因子的释放,增加抗炎性细胞因子的表达,从而减少脊髓组织的继发损伤,保护受损的神经细胞,达到促进恢复的作用.

Abstract：

Objective To investigate the effects of early HBO therapy on the expressions of pro inflammatory cytokine mRNA including tumor necrosis factor-α (TNF-α ) and interleukin-10 (IL-10) following spinal cord injury (SCI) in rats. Methods Forty SD rats were randomly divided into 3 groups:the sham operation group (n=4) , the SCI group (n = 18) , and the hyperbaric oxygen group (n = 18). Spinal cord injury model was developed by using the modified Allen impact. Then, the SCI group and the HBO group received HBO therapy 2 hours after injury, once a day. And 3 rats were randomly selected at 6, 12, 24, 72, 120 and 168 h following injury to take samples of injured spinal cord tissue and measure dynamic changes in the expressions of TNF-α, IL-10 mRNA by semi-quantitative RT-PCR method. Results Faint expression of the cytokine mRNA could be noticed in the sham group. The expression of TNF-α mRNA in the injured spinal cord tissue in the SCI group elevated gradually, increased obviously at 12 h after injury and reached peak at 24 h, and its high expression maintained till 72 h after injury. The tendency in the expression of TNF-α mRNA in the HBO group was identical to that of the SCI group, however, the amplitude in the increase of TNF-α mRNA decreased (P＜0. 05). The expression of IL-10 mRNA in the SCI group began to increase at 12 h after injury and increased gradually over time and reached peak at 168 h. The expressions of both TNF-α and IL-10 mRNA were more consistent in the HBO group, with more obvious increase in the expressions of IL-10 mRNA. Conclusions HBO could reduce the release of pro-inflammatory cytokines and increase the expression of anti-inflammatory cytokines,resulting in reduction of secondary spinal cord injury,protection of the damaged nerve cells and promotion of recovery.     

Effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαof small intestine in rats

Objective To observe effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαas well as the change pattern in rats. Methods Ninety-one Wistar rats were randomly divided into 3 groups: the control group (n =7), the open abdominal injury group(n =42) and open abdominal injury combined with 1-hour seawater immersion group ( n =42). The expression of NF-κB,andIκBαin small intestine tissues was measured by Western blot and statistical analyses were also made in the study. Results The expression of NF-κB,in the seawater immersion combined with open abdominal injury group increased significantly 3 hours after injury, when compared with that of the open abdominal injury group(P<0. 05), whereas the expression of NF-κB, of the pure injury group was slightly lower than that of the control group, but no statistical differences could be seen between them(P>0.05). The change pattern in the expression of IκBαwas quite the opposite to that of NF-κB. Conclusions NF-κB seemed to be rapidly and persistently involved in the whole inflammatory response to trauma induced by opened abdominal injury and seawater immersion, when a comparison was made with the pure open abdominal injury group. Injuries for the rats in the open abdominal injury combined with seawater immersion group were serious, and the feedback mechanism for NF-κB was not established for quite a long time.     

Effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαof small intestine in rats

Objective To observe effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαas well as the change pattern in rats. Methods Ninety-one Wistar rats were randomly divided into 3 groups: the control group (n =7), the open abdominal injury group(n =42) and open abdominal injury combined with 1-hour seawater immersion group ( n =42). The expression of NF-κB,andIκBαin small intestine tissues was measured by Western blot and statistical analyses were also made in the study. Results The expression of NF-κB,in the seawater immersion combined with open abdominal injury group increased significantly 3 hours after injury, when compared with that of the open abdominal injury group(P<0. 05), whereas the expression of NF-κB, of the pure injury group was slightly lower than that of the control group, but no statistical differences could be seen between them(P>0.05). The change pattern in the expression of IκBαwas quite the opposite to that of NF-κB. Conclusions NF-κB seemed to be rapidly and persistently involved in the whole inflammatory response to trauma induced by opened abdominal injury and seawater immersion, when a comparison was made with the pure open abdominal injury group. Injuries for the rats in the open abdominal injury combined with seawater immersion group were serious, and the feedback mechanism for NF-κB was not established for quite a long time.     

Effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαof small intestine in rats

Objective To observe effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαas well as the change pattern in rats. Methods Ninety-one Wistar rats were randomly divided into 3 groups: the control group (n =7), the open abdominal injury group(n =42) and open abdominal injury combined with 1-hour seawater immersion group ( n =42). The expression of NF-κB,andIκBαin small intestine tissues was measured by Western blot and statistical analyses were also made in the study. Results The expression of NF-κB,in the seawater immersion combined with open abdominal injury group increased significantly 3 hours after injury, when compared with that of the open abdominal injury group(P<0. 05), whereas the expression of NF-κB, of the pure injury group was slightly lower than that of the control group, but no statistical differences could be seen between them(P>0.05). The change pattern in the expression of IκBαwas quite the opposite to that of NF-κB. Conclusions NF-κB seemed to be rapidly and persistently involved in the whole inflammatory response to trauma induced by opened abdominal injury and seawater immersion, when a comparison was made with the pure open abdominal injury group. Injuries for the rats in the open abdominal injury combined with seawater immersion group were serious, and the feedback mechanism for NF-κB was not established for quite a long time.     

Effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαof small intestine in rats

Objective To observe effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαas well as the change pattern in rats. Methods Ninety-one Wistar rats were randomly divided into 3 groups: the control group (n =7), the open abdominal injury group(n =42) and open abdominal injury combined with 1-hour seawater immersion group ( n =42). The expression of NF-κB,andIκBαin small intestine tissues was measured by Western blot and statistical analyses were also made in the study. Results The expression of NF-κB,in the seawater immersion combined with open abdominal injury group increased significantly 3 hours after injury, when compared with that of the open abdominal injury group(P<0. 05), whereas the expression of NF-κB, of the pure injury group was slightly lower than that of the control group, but no statistical differences could be seen between them(P>0.05). The change pattern in the expression of IκBαwas quite the opposite to that of NF-κB. Conclusions NF-κB seemed to be rapidly and persistently involved in the whole inflammatory response to trauma induced by opened abdominal injury and seawater immersion, when a comparison was made with the pure open abdominal injury group. Injuries for the rats in the open abdominal injury combined with seawater immersion group were serious, and the feedback mechanism for NF-κB was not established for quite a long time.     

Effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαof small intestine in rats

Objective To observe effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαas well as the change pattern in rats. Methods Ninety-one Wistar rats were randomly divided into 3 groups: the control group (n =7), the open abdominal injury group(n =42) and open abdominal injury combined with 1-hour seawater immersion group ( n =42). The expression of NF-κB,andIκBαin small intestine tissues was measured by Western blot and statistical analyses were also made in the study. Results The expression of NF-κB,in the seawater immersion combined with open abdominal injury group increased significantly 3 hours after injury, when compared with that of the open abdominal injury group(P<0. 05), whereas the expression of NF-κB, of the pure injury group was slightly lower than that of the control group, but no statistical differences could be seen between them(P>0.05). The change pattern in the expression of IκBαwas quite the opposite to that of NF-κB. Conclusions NF-κB seemed to be rapidly and persistently involved in the whole inflammatory response to trauma induced by opened abdominal injury and seawater immersion, when a comparison was made with the pure open abdominal injury group. Injuries for the rats in the open abdominal injury combined with seawater immersion group were serious, and the feedback mechanism for NF-κB was not established for quite a long time.     

Effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαof small intestine in rats

Objective To observe effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαas well as the change pattern in rats. Methods Ninety-one Wistar rats were randomly divided into 3 groups: the control group (n =7), the open abdominal injury group(n =42) and open abdominal injury combined with 1-hour seawater immersion group ( n =42). The expression of NF-κB,andIκBαin small intestine tissues was measured by Western blot and statistical analyses were also made in the study. Results The expression of NF-κB,in the seawater immersion combined with open abdominal injury group increased significantly 3 hours after injury, when compared with that of the open abdominal injury group(P<0. 05), whereas the expression of NF-κB, of the pure injury group was slightly lower than that of the control group, but no statistical differences could be seen between them(P>0.05). The change pattern in the expression of IκBαwas quite the opposite to that of NF-κB. Conclusions NF-κB seemed to be rapidly and persistently involved in the whole inflammatory response to trauma induced by opened abdominal injury and seawater immersion, when a comparison was made with the pure open abdominal injury group. Injuries for the rats in the open abdominal injury combined with seawater immersion group were serious, and the feedback mechanism for NF-κB was not established for quite a long time.     

Effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαof small intestine in rats

Objective To observe effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαas well as the change pattern in rats. Methods Ninety-one Wistar rats were randomly divided into 3 groups: the control group (n =7), the open abdominal injury group(n =42) and open abdominal injury combined with 1-hour seawater immersion group ( n =42). The expression of NF-κB,andIκBαin small intestine tissues was measured by Western blot and statistical analyses were also made in the study. Results The expression of NF-κB,in the seawater immersion combined with open abdominal injury group increased significantly 3 hours after injury, when compared with that of the open abdominal injury group(P<0. 05), whereas the expression of NF-κB, of the pure injury group was slightly lower than that of the control group, but no statistical differences could be seen between them(P>0.05). The change pattern in the expression of IκBαwas quite the opposite to that of NF-κB. Conclusions NF-κB seemed to be rapidly and persistently involved in the whole inflammatory response to trauma induced by opened abdominal injury and seawater immersion, when a comparison was made with the pure open abdominal injury group. Injuries for the rats in the open abdominal injury combined with seawater immersion group were serious, and the feedback mechanism for NF-κB was not established for quite a long time.