核因子-κB与腹部开放伤合并海水浸泡大鼠全身炎症反应综合征的关系

目的探讨腹部开放伤合并海水浸泡大鼠全身炎症反应综合征（SIRS）发生时核因子-κB（NF-κB）的活性与SIRS的关系。方法采用腹部开放伤合并海水浸泡大鼠致伤模型并诱发SIRS。酶联免疫吸附（ELISA）法检测血肿瘤坏死因子-α（TNF-α）、白细胞介素-6（IL-6）水平,免疫组化技术检测NF—κB在外周血淋巴细胞（PBL）和小肠组织中的活性。结果腹部开放伤后海水浸泡1小时,大鼠出现SIRS;血TNF—α、IL-6水平升高;免疫组化显示大鼠PBL和小肠组织中NF-κB表达的阳性率显著升高,与对照组比较有统计学意义（P〈0．05或P〈0．01）。结论腹部开放伤合并海水浸泡可致大鼠SIRS,NF-κB和细胞因子参与了SIRS的发生、发展。NF-κB的激活介导了TNF—α、IL-6等细胞因子的释放,在SIRS中可能处于中心环节。     

尼莫同对大鼠创伤性脑损伤后脑组织NF-κB表达和活化的影响

目的 观察尼莫同对大鼠创伤性脑损伤(traumatic brain injury,TBI)后NF-κB表达和活化的影响. 方法制作SD大鼠落体撞击脑损伤模型,分别给予地塞米松和尼莫同干预,检测脑组织NF-κB P65和IκBα的表达. 结果 TBI后脑组织NF-κB P65的表达明显增加,伤后24 h最低,持续到96 h仍有明显表达;IκBα表达明显减弱,伤后24 h达到低峰.尼莫同与地塞米松可以显著降低TBI后NF-κB P65的表达和增加IκBα的表达(P<0.01),尼莫同作用优于地塞米松(P<0.05). 结论尼莫同可以抑制TBI后NF-κB表达和活化,从而调节脑损伤后的炎症反应.     

高压氧干预对大鼠创伤性脑损伤后脑组织NF-κB（p50）表达的影响

目的 观察高压氧干预（hyperbaric oxygenation treatment,HBOT）对大鼠创伤性脑损伤（traumatic brain injury,TBI）后NF-κB（p50）表达的影响,并探讨其机制。方法 将35只SD大鼠完全随机分为假手术对照组（Con组）5只、创伤组（TBI）15只、高压氧干预组（HBOT）15只。采用Allen’s改良法制造大鼠自由落体重型脑损伤模型,Con组仅切开头皮去骨窗,TBI组给予撞击损伤,HBOT组于创伤后给予高压氧治疗。利用Western-blot法分别于伤后8 h及1、3、5、8 d检测脑组织NF-κB的表达。结果 与Con组比,TBI组各时点脑组织NF-κB表达均升高（P〈0.05）,损伤后3 d达高峰（0.7267±0.0305）,5~8 d仍维持较高水平（0.5567±0.0603）。HBOT组各时点NF-κB表达水平均较TBI组下降（P〈0.05）。结论 高压氧干预可以减弱创伤后脑组织NF-κB（p50）表达,有效抑制炎性反应,为重型颅脑损伤治疗提供理论基础。     

沙漠干热环境下猪腹部肠管火器伤后肝组织中NF-κB 、TNF-α的表达

目的探讨沙漠干热环境下猪腹部肠管火器伤后肝脏组织中核因子-κB(NF-κB)和肿瘤坏死因子-α(TNF-α)的表达及其与肝损伤的关系。方法健康长白仔猪42头随机等分为对照组和伤后1、2、4、8、12 h和24 h组,在沙漠干热环境下建立腹部肠管火器伤模型后,用免疫组化及图像分析法测定各组肝脏组织内NF-κB和TNF-α的表达,同时测定血清中ALT水平,在光镜下观察各组肝脏组织学变化。结果伤后各组肝内NF-κB、TNF-α表达明显高于对照组(P<0.05),NF-κB于伤后1 h和4 h出现2个高峰(P<0.05);TNF-α于伤后1h和8 h出现2个高峰(P<0.05);血清ALT水平在伤后明显升高,也于伤后1 h和8 h出现2个高峰(P<0.05);伤后1、2 h组出现逐渐加重的肝细胞水肿、变性,伤后4 h组开始出现逐渐加重的肝细胞点状坏死、灶状坏死和炎细胞浸润,对照组光镜下未见明显的损伤性变化;NF-κB与TNF-α的表达在2 h组和4 h组均有正相关关系(P<0.05)。结论沙漠干热环境下腹部肠管火器伤后肝内NF-κB、TNF-α表达一致性升高,二者在伤后早期表达密切相关,并与肝脏结构和功能损伤变化基本一致,提示NF-κB和TNF-α在沙漠干热环境下腹部肠管火器伤后肝损伤过程中起重要作用。     

内毒素对心肌组织核因子-κB活化的影响及其意义

目的 通过观察内毒素(LPS)攻击大鼠心肌组织核因子-κB(NF-κB)的活化情况,探讨心肌损伤的可能信号机制.方法 大鼠腹腔注射5mg/kg LPS制作脓毒症模型,采用凝胶阻滞迁移分析法(EMSA)检测心肌组织NF-κB活化情况,RT-PCR法检测TNF-α基因表达情况.结果 LPS攻击后1h,NF-κB活化及TNF-α基因表达开始升高,2h达高峰,6h后逐渐下降.相关分析表明,心肌组织NF-κB活化与TNF-α基因表达呈显著正相关(r=0.992 2,P＜0.05).结论 LPS可增强心肌组织NF-κB的活化并诱导TNF-α基因表达.NF-κB活化导致的TNF-α合成增加在LPS介导心肌损害的分子机制中可能具有重要作用.     

MEBT/ MEBO对慢性难愈合创面 NF-κB p65、IκBα、IKK及其磷酸化蛋白表达水平的影响

【摘要】 目的 探讨创疡再生医疗技术 (MEBT/MEBO) 对慢性难愈合创面组织中核因子 κB (NF-κB) p65?NF-κB 抑制蛋白(IκB)、IκB激酶(IKK) 及其磷酸化蛋白表达水平的影响。 方法 选取 SPF 级雄性 Wistar 大鼠90 只适应性饲养1周后,按照随机数表法将其随机分为空白组、对照组、模型组、MEBO组和贝复新组,每组18 只。空白组大鼠仅做备皮处理,对照组大鼠建立急性创面模型,模型组、MEBO组、贝复新组大鼠建立慢性难愈合创面模型?空白组大鼠备皮处皮肤及对照组、模型组大鼠创面采用生理盐水纱布换药处理,MEBO 组大鼠创面采用湿润烧伤膏 (MEBO) 药纱换药处理,贝复新组大鼠创面采用重组牛碱性成纤维细胞生长因子换药处理,对比各组大鼠干预第3、7、14天创面愈合率、组织病理学变化,以及皮肤/ 创面组织中NF-κB p65、IκBα、IKK及 p-NF-κB p65、p-IκBα、p-IKK 蛋白表达水平。结果 (1)干预第 3、7 天,各组大鼠创面愈合率均无明显差异(P均＞0. 05);干预第 14 天,模型组大鼠创面愈合率明显低于对照组、MEBO组(P均＜0.05),其余各组间创面愈合率均无明显差异 (P均＞0.05)。(2)干预第 7 天,MEBO 组、贝复新组大鼠创面组织中胶原纤维量均明显增加,可见大量成纤维细胞和新生毛细血管及少量毛囊结构生成; 干预第14天,MEBO 组、贝复新组大鼠创面组织中胶原纤维量明显多于模型组,可见整齐排列的毛细血管及成熟的毛囊、皮脂腺等组织,而模型组大鼠创面组织中仍可见少量炎症细胞浸润,但已有大量成纤维细胞生成。(3) 干预第7、14天,空白组、对照组、MEBO组大鼠创面组织中 NF-κB p65、IKK、p-NF-κB p65、p-IKK、p-IκBα 蛋白表达水平均明显低于模型组(P均＜0.05);干预第 7 天,MEBO 组大鼠创面组织中 NF-κB p65、IκBα 蛋白表达水平均明显高于贝复新组 (P均＜0.05),IKK、p-NF-κB p65、p-IKK、p-IκBα 蛋白表达水平均明显低于贝复新组 (P 均＜0.05); 干预第 14天,MEBO 组大鼠创面组织中 IKK、IκBα蛋白表达水平均明显低于贝复新组 (P 均＜0.05)。结论 MEBT/ MEBO促进慢性难愈合创面愈合的机制可能与创面组织中 NF-κB p65、IκBα、IKK 及其磷酸化蛋白的表达水平有关。     

N-乙酰半胱氨酸对大鼠颅脑损伤后ICAM-1和NF-κB表达的影响

目的 观察N-乙酰半胱氨酸(NAC)对大鼠颅脑损伤后细胞问黏附因子-1(ICAM-1)和核转录因子-κB(NF-κB)表达的影响,探讨其脑保护机制.方法 90只Wistar大鼠随机分为假手术组(n=6)、颅脑创伤组(n=42)及颅脑创伤NAC干预组(n=42).采用自由落体法建立大鼠颅脑创伤模型,应用免疫组织化学法检测NF-κB和ICAM-1表达的变化.结果 与假手术组相比,脑损伤组NF-κB和ICAM-1表达水平明显升高,NAC可降低NF-κB和ICAM-1表达,减轻炎症反应.结论 NAC可能通过抑制NF-κB和ICAM-1的表达,减轻炎症反应,发挥脑保护作用.     

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.     

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.     

猪腹部火器伤肠管穿透后NF-κB在心脏中的表达及其意义

目的探讨NF-κB在腹部火器伤肠管穿透后心脏中的变化及意义。方法健康长白仔猪42头随机等分为对照组和伤后1、2、4、8、12 h和24 h组,实验组建立腹部火器伤肠管穿透模型后,用免疫组化图像分析法测定各组心肌组织NF-κB活性,同时测定血清中LDH、CK-MB水平,在光镜下观察各组心脏组织学变化,电镜下观察心脏超微结构改变。结果伤后各组心脏NF-κB表达明显高于对照组。伤后各组血清LDH、CK-MB水平均高于对照组。伤后8、12、24 h组光镜下出现逐渐加重的心肌细胞水肿、变性;电镜下4、8、12、24 h组出现逐渐的线粒体肿胀、溶解;对照组光、电镜下未见明显的损伤性变化。相关分析表明,伤后心肌组织NF-κB表达与血清LDH、CK-MB水平均呈正相关(r值分别为0.968、0.957,P<0.05)。结论腹部火器伤肠管穿透后心肌组织内NF-κB活性增强;NF-κB在腹部火器伤肠管穿透后继发性心脏损伤中具有重要意义。     

海水淹溺型急性肺损伤早期肺组织核因子-κB及相关细胞因子的动态变化

目的探讨海水淹溺型急性肺损伤早期核因子-κB(nuclear factor-kappa B,NF-κB)活性及相关细胞因子动态变化。方法 36只新西兰兔随机分成对照组(0 h)和海水灌注后1、3、6、12、24 h组。灌注组经气管插管灌注2 ml/kg海水。观察各组动物血气分析的变化。计算肺湿干重比值、肺通透指数。以非放射性凝胶迁移实验分析肺组织NT-κB活性,酶联免疫吸附法检测肺组织肿瘤坏死因子-α(tumor necrosis factor-alpha,TNF-α)、白介素(interleukin,IL)-1β、IL-10浓度,同时进行病理学检查,计算肺病理评分。结果与对照组比,海水灌注组氧合指数迅速低至300 mmHg以下,持续时间长达6 h(P<0.01);肺大体标本淤血水肿严重,显微镜下可见炎症细胞浸润等急性肺损伤病理学征象;肺湿干重比于海水灌注后3 h达高峰,肺通透指数及肺病理评分以海水灌注后6 h组数值最高;肺组织NF-κB活性及TNF-α、IL-1β、IL-10表达量显著增高,并于6 h达高峰。海水淹溺型急性肺损伤早期NF-κB活性与TNF-α、IL-1β、IL-10及肺病理评分正相关(P<0.05),TNF-α、IL-1β、IL-10与肺病理评分、肺通透指数亦密切相关(P<0.05)。结论 NF-κB活化在海水淹溺型急性肺损伤早期与细胞因子过度释放密切相关,在肺组织炎症反应和病理损害中起重要作用。