落新妇甙对热缺血再灌注损伤肝脏肿瘤坏死因子α与白细胞介素-10表达的影响

Objective To investigate the effects of astilbin on the expressions of TNF α and IL-10 during liver warm ischemia-reperfusion injury. Methods C57BL/ 6 mice were randomly divided into 4 groups (n = 8): sham-operated group (Sham), model control group(I/R), low dosage of astilbin treatment group (10 mg/kg) and high dosage of astilbin (40 mg/kg) treatment group. The treatment group mice were intraperitoneally injected with 10 or 40 mg/kg astilbin 24 hours and one hour before Ischemia, the hepatic ischemia-reperfusion model were thus established. After jn90 of min ischemia and 6 h reperfusion of the partial hepatic lobe, the expressions of TNF α and IL-10 in liver tissues collected from the experimental groups were detected by Western blot and semiquantitative RT-PCR. Results The expression of TNF a protein in liver tissues gradually decreased in treatment groups (low and high dosages of astilbin treatment groups) as compared to the I/R model control group. Similar results were observed in the mRNA expressions of these genes as determined by semiquantitative RT-PCR (P < 0.05 for low dosage group; P < 0.01 for high dosage group). Compared with the I/R model control group, the expression of IL-10 was increased in both treatment groups (low dosage group P < 0.05; large dosage group P < 0.01). Conclusion Treatment with astilbin decreases TNF α expression but induces IL-10 expression in liver during warm ischemia-reperfusion injury.     

落新妇甙对热缺血再灌注损伤肝脏肿瘤坏死因子α与白细胞介素-10表达的影响

Objective To investigate the effects of astilbin on the expressions of TNF α and IL-10 during liver warm ischemia-reperfusion injury. Methods C57BL/ 6 mice were randomly divided into 4 groups (n = 8): sham-operated group (Sham), model control group(I/R), low dosage of astilbin treatment group (10 mg/kg) and high dosage of astilbin (40 mg/kg) treatment group. The treatment group mice were intraperitoneally injected with 10 or 40 mg/kg astilbin 24 hours and one hour before Ischemia, the hepatic ischemia-reperfusion model were thus established. After jn90 of min ischemia and 6 h reperfusion of the partial hepatic lobe, the expressions of TNF α and IL-10 in liver tissues collected from the experimental groups were detected by Western blot and semiquantitative RT-PCR. Results The expression of TNF a protein in liver tissues gradually decreased in treatment groups (low and high dosages of astilbin treatment groups) as compared to the I/R model control group. Similar results were observed in the mRNA expressions of these genes as determined by semiquantitative RT-PCR (P < 0.05 for low dosage group; P < 0.01 for high dosage group). Compared with the I/R model control group, the expression of IL-10 was increased in both treatment groups (low dosage group P < 0.05; large dosage group P < 0.01). Conclusion Treatment with astilbin decreases TNF α expression but induces IL-10 expression in liver during warm ischemia-reperfusion injury.     

缺血后处理下调脑缺血再灌注大鼠白细胞介素-1β和肿瘤坏死因子-α表达

目的 探讨缺血后处理(ischemic postconditioning,IP)对局灶性脑缺血再灌注大鼠白细胞介素-1β(interleukin- 1β,IL-1β)和肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)表达的影响.方法 110只成年健康雄性Sprague-Dawley大鼠随机分为假手术组(n=10)、缺血再灌注组和IP组,后2组根据再灌注时间再分为6、12、24、48和72 h亚组(每亚组n=10).采用大脑中动脉线栓法建立局灶性脑缺血再灌注模型.IP方法为在大脑中动脉闭塞2h后实施再灌注15 s/缺血15 s,反复3次.对各组大鼠进行神经行为学评分,2,3,5-氯化三苯基四氮唑染色测定脑梗死体积,免疫组化法检测脑组织TNF-α和IL-1β蛋白表达,原位杂交法检测IL-1β和TNF-α mRNA表达.结果 与缺血再灌注组比,IP组神经行为学评分显著降低(P均＜0.05),脑梗死体积显著缩小(P均＜0.05).假手术组额顶叶皮质IL-1β、TNF-α蛋白和mRNA表达微弱;缺血再灌注组IL-1β、TNF-α蛋白和mRNA在额顶叶皮质大量表达,6h开始上调,24 h达高峰(与其他时间点比较,p均＜0.05),之后逐渐下降;IP组具有相同的动态变化趋势,且各时间点表达量均显著低于缺血再灌注组(P均＜0.05).结论 IP可显著下调脑组织IL-1β和TNF-α表达,缩小缺血再灌注大鼠脑梗死体积,提示IP可通过抑制脑组织缺血再灌注后炎症反应发挥神经保护作用.     

肿瘤坏死因子-α与脑缺血再灌注损伤

作为一种重要的炎性细胞因子,肿瘤坏死因子-α(tulllor necrosis factor-α,TNF-α)在脑缺血再灌注过程中起重要作用.探讨TNF-α,在脑缺血再灌注损伤过程中的动态变化、神经毒性作用机制以及拮抗TNF-α的治疗作用,将为脑血管病的治疗提供理论依据.     

肿瘤坏死因子-α与脑缺血再灌注损伤

脑缺血再灌注后脑内肿瘤坏死因子 α(TNF α)的表达增加 ,在再灌注损伤病理过程中TNF α具有损伤与修复双重作用。其作用机制与致炎、促凝血机制、血脑屏障破坏、诱导缺血耐受及神经生长因子生成等有关。     

加味丹参饮对心肌缺血再灌注损伤血瘀证兔肿瘤坏死因子α和白细胞介素-2的影响

目的研究加味丹参饮对心肌缺血再灌注损伤(IRI)血瘀证兔肿瘤坏死因子-α(TNF-α)和白细胞介素-2(IL-2)的影响,探讨对心肌IRI的保护作用机制。方法家兔60只,随机分为A组(空白组)、B组(血瘀证组)、C组(IRI组)、D组(预处理组)、E组(丹参组)、F组(加味丹参饮组),每组10只。建立血瘀证兔IRI模型,采用加味丹参饮对该模型进行干预,观察炎症因子TNF-α和IL-2以及乳酸脱氢酶(LDH)和肌酸激酶同工酶(CK-MB)的水平变化。结果 IRI组TNF-αI、L-2、LDH和CK-MB水平明显升高,与空白组比较有统计学意义(P<0.05);加味丹参饮可以降低TNF-αI、L-2、LDH和CK-MB水平,与IRI组比较亦有统计学意义(P<0.05)。结论加味丹参饮可以降低炎症因子水平,防止心肌细胞损伤,这是其保护心肌IRI作用机制之一。     

肿瘤坏死因子α和白细胞介素-1βmRNA在大鼠肝缺血再灌注损伤时肺组织中的表达及意义

大量的研究表明，在器官缺血再灌注损伤所致肺损伤过程中，肿瘤坏死因子α(TNFα)和白细胞介素-1β(IL-1β)都发挥了重要作用。本实验旨在观察肝缺血再灌注损伤过程中TNFα和IL-1β在肺组织中表达的动态变化。     

芹菜素预处理对缺血再灌注大鼠心肌肿瘤坏死因子-α表达的影响

目的研究芹菜素对缺血再灌注大鼠心肌肿瘤坏死因子-α(TNF-α)表达的影响,探讨抗心肌缺血再灌注损伤的可能机制。方法将Wistar大鼠随机分为5组,假手术组、缺血再灌注对照组、溶剂对照组、芹菜素低剂量组、芹菜素高剂量组。采用结扎左冠脉前降支制作缺血再灌注模型,心肌缺血30 min,再灌注2 h。心肌苏木素碱性品红苦味酸(Hematoxylin basic fuchsin picric,HBPF)染色观察心肌形态学改变,免疫组化染色检测心肌组织TNF-α的表达。结果芹菜素组可降低心肌组织TNF-α的表达,与缺血再灌注对照组比较有统计学意义(P<0.05)。结论芹菜素对缺血再灌注心肌的保护作用可能与减少心肌TNF-α的表达有关。     

P38MAPK抑制剂对皮瓣缺血再灌注损伤发展及TNF-α与IL-10表达的影响

目的探讨P38MAPK抑制剂对皮瓣缺血再灌注损伤发展及肿瘤坏死因子(TNF)-α和白细胞介素(IL)-10表达的影响。方法选取48只12~14周龄的健康Wistar大鼠,并将其制作为大鼠腹部轴型浅动静脉皮瓣模型,按照随机数字表法将其均分为对照组、缺血再灌注组、生理盐水组和抑制剂组。术后第7天分别采用酶联免疫吸附测定法(ELISA)测定各组大鼠的皮瓣存活率和血清TNF-α、IL-10浓度,同时采用免疫组织化学法检测各组大鼠皮瓣的P38MAPK和P-P38MAPK表达情况。结果 1对照、抑制剂组大鼠皮瓣存活率高于缺血再灌注、生理盐水组(P0.05),对照、抑制剂组,缺血再灌注、生理盐水组之间皮瓣存活率均无统计学差异(P0.05);2对照、抑制剂组大鼠血清TNF-α浓度低于缺血再灌注、生理盐水两组(P0.05),对照、抑制剂组,缺血再灌注、生理盐水组之间血清TNF-α浓度比较无统计学差异(P0.05);抑制剂组大鼠血清IL-10浓度高于对照、缺血再灌注、生理盐水组(P0.05),缺血再灌注、生理盐水、抑制剂三组大鼠血清IL-10浓度无统计学差异(P0.05);3缺血再灌注、生理盐水、抑制剂组大鼠P38MAPK、P-P38MAPK评分高于对照组,而缺血再灌注、生理盐水组评分高于抑制剂组(P0.05);4皮瓣存活率与TNF-α呈负相关(r=-0.582,P0.05),P38MAPK、P-P38MAPK评分与TNF-α均呈正相关(r=0.608、0.775,P0.05),皮瓣存活率、P38MAPK、P-P38MAPK评分与IL-10均无相关关系(P0.05)。结论 P38MAPK抑制剂通过抑制皮瓣中P38MAPK信号通路,减少P38MAPK和P-P38MAPK的表达,从而降低血清TNF-α的浓度,减轻缺血再灌注损伤,提高皮瓣的存活率。     

大豆异黄酮对大鼠肝脏缺血再灌注损伤的保护作用

肝脏缺血再灌注损伤(HIRI)的机制尚未阐明,可能与活性氧(ROS)生成、细胞因子参与、肝细胞内钙离子超载、细胞凋亡等有关[1].大豆异黄酮(SI)是人们公认的抗氧化剂及抗炎药物.研究结果表明,其对心肌、脑等器官缺血再灌注损伤具有保护作用[2-3].但对HIRI是否具有保护效应,鲜见报道.本研究通过动物实验观察了SI对HIRI的保护作用.     

人白介素-10基因转染对大鼠脑缺血再灌注损伤半影区炎性因子基因和蛋白表达的影响

目的 观察人白介素(IL)-10基因转染对大鼠局灶脑缺血再灌注损伤半影区肿瘤坏死因子-α(TNF-α)和白介素-1β(IL-1β)基因和蛋白表达的影响. 方法 建立大脑中动脉栓塞(MCAO)模型,采用立体定向脑室内注射的方式进行转染,逆转录-聚合酶链式反应(RT-PCR)和酶联免疫吸附实验(ELISA)检测其转染效果,氯化三苯四氮唑(TTC)染色测定脑梗死体积,荧光实时定量PCR检测半影区TNF-α和IL-1β基因表达情况,ELISA法检测半影区TNF-α和IL-1β蛋白的含量.结果 正常对照组、缺血对照组、空质粒组和IL-10基因转染组半影区TNF-α蛋白含量分别为(0.66±0.04)、(1.16±0.26)、(1.15±0.26)ng/g和(0.84±0.05)ng/g,IL-1β蛋白含量分别为(0.37±0.05)、(1.25±0.39)、(1.21±0.58)ng/g和(0.62±0.05)ng/g.与正常对照组比较,其余各组TNF-α和IL-1β蛋白含量明显升高(P＜0.01),而IL-10基因转染组TNF-α和IL一1β含量则较缺血对照组和空质粒组显著降低(P＜0.01);正常对照组,缺血对照组、空质粒组和IL-10基因转染组半影区TNF-αmRNA的表达量分别为1.00±0.53、9.42±1.83、9.69±1.96和3.53±1.09;IL-1βmRNA的表达量分别为1.00±0.51、27.81±4.84、23.96±4.90和13.55±4.45.与正常对照组比较,其余各组TNF-α和IL-1βmRNA表达量明显升高(P＜0.01),而IL-10基因转染组TNF-α和IL-1βmRNA表达量则较缺血对照组和空质粒组显著降低(P＜0.01). 结论 人IL-10基因转染后能抑制大鼠局灶脑缺血再灌注损伤半影区TNF-α和IL-1β基因和蛋白的表达,可能是其发挥缺血脑保护作用的机制之一.     

肿瘤坏死因子-α在大鼠脑缺血再灌注损伤中的作用机制

目的　探讨肿瘤坏死因 α(TNF α)在大鼠脑缺血再灌注损伤中的作用机制 ,尝试应用抗TNF α单抗进行缺血后的脑保护治疗。　方法　分别应用免疫组化方法和分光光度计比色法监测经大脑中动脉闭塞 2h后tor大鼠脑缺血再灌注不同时点TNF α的表达规律及髓过氧化物酶 (MPO)活性 ,并应用四氮唑红 (TTC)染色法测量再灌注 2 4h脑梗死灶体积。　结果　脑缺血再灌注后 2 4hTNF α表达和白细胞活性均达到高峰〔分别为 (3 7 86± 9 78)个和 (0 2 90± 0 0 71)U/ g湿组织 ;对照组分别为 (1 83± 1 41)个和 (0 0 16± 0 0 0 3 )U/ g湿组织〕 ,二者呈现同步变化。应用抗TNF α抗体可减少白细胞聚集〔治疗组为 (0 148± 0 0 3 3 )U/g湿组织〕和脑梗死灶体积〔手术组为 (15 8 7± 8 1)mm3,治疗组为 (86 3± 12 2 )mm3〕。　结论　TNF α通过炎性反应参与了缺血再灌注脑损伤 ,应用抗TNF α抗体可起到缺血性脑保护作用     

三七总皂甙对大鼠肝缺血再灌注损伤的保护

三七总皂甙对大鼠肝缺血再灌注损伤的保护梁力建１何强２吕明德１彭宝冈１黄洁夫Ｔｈｅｐｒｏｔｅｃｔｉｖｅｅｆｅｃｔｓｏｆｐａｎａｘｎｏｔｏｇｉｎｓｅｎｇｏｎｌｉｖｅｒｉｓｃｈｅｍｉａ－ｒｅｐｅｒｆｕｓｉｏｎｉｎｊｕｒｙｉｎｒａｔｓＬＩＡＮＧＬｉ＿Ｊｉ...     

Protective effect of curcumin against liver warm ischemia/reperfusion injury in rat model is associated with regulation of heat shock protein and antioxidant enzymes

AIM： To investigate the hypothesis that the protective effects of curcumin in hepatic warm ischemia/reperfusion （I/R） injury are associated with increasing heat shock protein 70 （Hsp70） expression and antioxidant enzyme activity. METHODS： Sixty Sprague-Dawley male rats were randomly divided into sham, I/R, C ＋ I/R groups. The model of reduced-size liver warm ischemia and reperfusion was used. Curcumin （50 mg/kg） was administered by injection through a branch of superior mesenteric vein at 30 min before ischemia in C ＋ I/R group. Five rats were used to investigate the survival during 1 wk after operation in each group. Blood samples and liver tissues were obtained in the remaining animals after 3, 12, and 24 h of reperfusion to assess serum alanine aminotransferase （ALT）, aspartate aminotransferase （AST）, liver tissue NO2- ＋ NO3-, malondialdehyde （MDA） content, superoxide dismutase （SOD）, catalase （CAT）, nitricoxide synthase （NOS） and myeloperoxidase （MPO） activity, HspT0 expression and apoptosis ratio. RESULTS： Compared with I/R group, curcumin pretreatment group showed less ischemia/reperfusioninduced injury. CAT and SOD activity and Hsp70 expression increased significantly. A higher rate of apoptosis was observed in I/R group than in C ＋ I/R group, and a significant increase of MDA, NO2^- ＋ NO3^- and MPO level in liver tissues and serum transaminase concentration was also observed in I/R group compared to C ＋ I/R group. Curcumin also decreased the activity of inducible NO synthase （iNOS） in liver after reperfusion,but had no effect on the level of endothelial NO synthase （eNOS） after reperfusion in liver. The 7 d survival rate was significantly higher in C ＋ I/R group than in I/R group. CONCLUSION： Curcumin has protective effects against hepatic I/R injury. Its mechanism might be related to the overexpression of Hsp70 and antioxidant enzymes.     

乌司他丁在肺缺血再灌注损伤中的保护作用

目的 :研究乌司他丁 (UTI)在肺缺血再灌注损伤中的保护作用。方法 :采用新西兰大白兔 32只肺缺血再灌注模型 ,均分为 4组 :对照组 (Ⅰ组 ) ,Ⅱ组缺血前 30min用UTI 0 .6万U/kg ,Ⅲ组 :缺血前 30min用UTI 1.2万U/kg ,Ⅳ组 :缺血前 30min及再灌注初分别给药UTI 1.2万U/kg。于夹闭左肺门前和开放左肺门 30min后 ,分别取左、右房血测白细胞计数 ,并于缺血前及再灌注后 2h取肺组织行病理学检查及测其湿干重比、丙二醛含量。结果 :再灌注后Ⅱ、Ⅲ组和Ⅳ组右房血白细胞 /左房血白细胞比值显著低于Ⅰ组 (P <0 .0 5 ) ;与Ⅰ组比较 ,再灌注后Ⅱ、Ⅲ、Ⅳ组肺组织的湿干重比及丙二醛含量均明显降低 (P <0 .0 5 ) ,肺组织病理改变减轻。结论 :UTI能减轻肺缺血再灌注损伤     

IL-10对大鼠肝纤维化的治疗作用及对TNF-α、IGF-1及IGF-1R表达的影响

目的外源性白介素-10(IL-10)对大鼠肝纤维化的治疗作用及对肿瘤坏死因子-α(TNF-α)和胰岛素样生长因子-1(IGF-1)及其受体(IGF-1R)表达的影响.方法40只SD大鼠随机分为正常对照组和CCl4诱发肝纤维化模型组.至造模第9周,模型组随机分为3组,S组造模结束即处死,Ⅰ组IL-10治疗2周后处死,R组为自然恢复2周后处死.通过HE染色评价各组肝纤维化的程度,SP免疫组化检测各组大鼠肝脏TNF-α、IGF-1、IGF-1R表达情况.结果肝病理组织学显示:I组纤维化程度有明显改善,R组纤维化程度没有明显改善.TNF-α、IGF-1、IGF-1R在S组表达显著升高(P＜0.05),在R组及Ⅰ组表达下降,但Ⅰ组下降较R组明显,与R组比较差别有显著意义(P＜0.05).结论外源性IL-10能明显抑制炎性细胞因子TNF-α的表达和IGF-1及IGF-1R的表达,这可能是IL-10对大鼠肝纤维化治疗作用的机制之一.     

白细胞介素-10和肿瘤坏死因子基因多态性与湖北汉族人群胃十二指肠疾病及幽门螺杆菌感染的相关性

Objective To study the distribution of IL-10 and TNF gene polymorphisms in patients with gastroduodenal diseases in Hubei Han ethnic and their association with Helicobacter pylori (Hp) infection. Methods Six hundred and five patients with gastroduedenal diseases (196 chronic gastritis, 189 gastroduodenal ulcer and 220 gastric cancer) as well as 624 healthy controls were genotyped with PCR-RFLP method for IL-10-1082,-819,-592 and TNFα-308, lymphotoxin-α (LTα) Nco Ⅰ and AspH Ⅰ gene polymorphisms. Hp infection status was determined with ELLS& Results (1) There was significant difference of IL-10-1082 AG + GG genotype among the gastric cancer group with the non-malignant gastric diseases groups and healthy control group (P <0. 05). There was no significant difference of IL-10-592 and -819 gene polymorphisms among gastric cancer patients,non-malignant gastric disease patients and healthy controls (P>0. 05). The genotype frequencies of IL-10-819 were the same as those of IL-10-592. (2) Frequency of IL-10-1082 AG + GG genotype in gastric cancer patients with positive Hp was significantly higher than that in the other three groups (P < 0. 05). (3) Frequency of LTα Nco I AG genotype in gastric cancer patients with Hp infection was signiilcandy higher than that in Hp positive healthy controls (P < 0. 05). There were no other associations between TNFα-308, LTα Nco Ⅰ and AspH Ⅰ gene polymorphisms and Hp infection in gastroduodenal diseases. Conclusions (1) Allele AG + GG of IL-10-1082 was associated with gastric cancer in Han nationality of Hubei province. (2) IL-10-1082 AG + GG,LTct Nco ⅠAG heterozygous genotype may be associated with Hp infection in patients with gastric cancer in Han nationality of Hubei province.