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白细胞介素-6与肝再生 总被引:1,自引:0,他引:1
肝再生是一个复杂的过程。涉及的细胞类型和再生机制取决于肝损害的程度、损害的类型、基础肝病及全身性反应能力。肝再生能力对于爆发性肝衰竭(FHF)、部分肝切除(PH)后肝容积的恢复起决定性作用。近年的研究表明,白细胞介素-6(IL- 6)、肿瘤坏死因子-α(TNF-α)既是炎症细胞因子,又是肝再生的重要启动因子。用TNF-R1和IL -6敲除鼠(IL-6KO)进行研究发现,TNF经TNF -R1→NF-kB(核因子-kB)→IL-6→STAT3(信号转导及转录活化蛋白)通道发挥作用。与肝细胞生长因子(HGF)、转化生长因子-α(TGF-α)、表皮生长因子(EGF)等共同参与,导致肝细胞再生。提示IL-6在启动肝再生中发挥重要作用。本文就IL-6与肝再生的研究综述如下。 相似文献
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目的 探讨白细胞介素(IL)-18硫代修饰反义寡脱氧核苷酸(ASPODN)对同种异体部分移植肝再生的促进作用。 方法 将供体SD大鼠与受体LEW大鼠随机分为50%部分肝移植组(PLT组)、部分肝移植IL-18 ASPODN治疗组(IL-18 ASPODN组)及部分肝移植IL-18硫代修饰正义寡脱氧核苷酸治疗组(IL-18 SPODN组),每组供、受体大鼠各30只。检测移植肝肝细胞BrdU标记变化;检测移植肝IL-18蛋白和γ干扰素(INF-γ)mRNA表达以及受体血清IFN-γ水平。 结果 移植术后72 h,3组移植肝肝细胞再生均达到高峰。IL-18 ASPODN组移植肝肝细胞BrdU高峰标记指数(58.3%±7.5%)明显高于PLT组(31.6%±6.7%)及IL-18 SPODN组[(33.4±5.5%),t=6.503、6.558,P<0.001];移植术后48、72和96 hIL-18 ASPODN组移植肝内IL-18蛋白和IFN-γ mRNA表达量以及受体血清IFN-γ水平均明显低于PLT组(IL-18蛋白比较:t=2.950,P<0.05;t=5.916、7.947,P<0.001;INF—γ mRNA比较:t=2.558,P<0.05;t=6.292、8.925,P<0.001;IEN-γ水平比较:t=16.998、15.483、54.723,P<0.001)和IL-18SPODN组(IL-18蛋白比较:t=2.845,P<0.05;t=6.062、6.973,P<0.001;INF-γ mRNA比较:t=3.117,P<0.05;t=6.154、8.738,P<0.001;IFN-γ水平比较:t=14.531、18.139、46.924,P<0.001)。结论 IL-18 AS 相似文献
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从白细胞介素-10(IL-10)的生物学特性、癫痫发病时脑内IL-10的变化及IL-10在癫痫脑损伤中的作用等方面进行综述,免疫手段有望成为治疗癫痫的一个新视窗. 相似文献
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白细胞介素10(IL-10)是一种重要的免疫调节因子,具有强大的抗炎作用,在骨质疏松的发生、发展中起重要作用。IL-10通过下调促炎症因子的表达抑制破骨细胞的激活,以及直接抑制破骨细胞的分化从而减少骨吸收;同时还可影响成骨细胞的增殖活性和骨形成。另外,IL-10基因启动子区有高度多态性,决定了IL-10基因的转录和表达水平,并与骨密度的变化和骨质疏松的发病风险相关。IL-10及其遗传多态性影响骨代谢机制的研究可能为骨质疏松的治疗开辟新的途径。 相似文献
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背景:肝纤维化病程迁延且药物治疗效果不理想.基因治疗将成为这一领域研究的热点。研究显示白细胞介素(IL)-10对肝脏具有保护作用,可阻止肝纤维化的发生、发展。目的:克隆并鉴定Sprague-Dawley(SD)大鼠IL-10基因的全长cDNA,为进一步构建大鼠IL-10腺病毒重组子和肝纤维化基因治疗的研究奠定基础。方法:自行设计IL-10上下游引物,以逆转录聚合酶链反应(RT-PCR)从SD大鼠脾脏单核细胞中扩增编码大鼠成熟IL-10肽链的cDNA片断。扩增产物与连接载体pMD-18T连接后转化感受态菌DH5α,构建重组载体pMD-18T-IL-10。结果:以SD大鼠脾脏单核细胞总RNA为模板,RT—PCR扩增出大小为540bp的大鼠IL-10 cDNA片断。所构建的重组质粒经HindⅢ KvnⅠ双酶切显示含有目的基因片段,测序结果证实扩增出的DNA片断与大鼠IL-10基因序列相符,表明编码区无基因突变。结论:成功地克隆了大鼠IL-10基因的全长cDNA,并构建了重组载体pMD-18T-IL-10。 相似文献
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白细胞介素 10 (IL 10 )由单核巨噬细胞、淋巴细胞等产生的是多向性生物活性的免疫抑制因子 ,具有抗炎作用 ,能抑制动脉粥样硬化斑块的形成。随着人们对脑血管病发病机制中免疫反应及炎症因素作用的进一步认识 ,使IL 10对脑血管病的治疗具有潜在的应用前景。文章介绍了IL 10的生物学特性、在急性脑血管病中的作用机制和神经保护作用 相似文献
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IL-10对实验性肝纤维化大鼠基质金属蛋白酶-2影响的研究 总被引:12,自引:1,他引:12
目的研究IL-10对实验性肝纤维化大鼠基质金属蛋白酶-2(MMP-2)的影响.方法建立大鼠肝纤维化模型并行IL-10干预实验,从正常大鼠(N组)和CCl4诱导肝纤维化大鼠(C组)及IL-10干预肝纤维化大鼠(E组)中取肝脏组织,采用S-P免疫组织化学方法检测分析不同组大鼠肝脏组织中MMP-2的表达状况.结果N组MMP-2阳性染色偶见于窦内皮细胞及肝细胞的胞浆;C组MMP-2阳性染色多见于汇管区新生的胆管细胞及纤维隔内条索状的成纤维细胞,26例标本中阳性13例,强阳性8例.第5周开始MMP-2有阳性表达,第9周阳性表达明显增强;E组MMP-2阳性染色明显减少,多见于汇管区的新生胆管细胞,27例标本中阳性10例,强阳性1例.Redit分析表明3组间MMP-2阳性表达有显著性差异(P<0.01).结论MMP-2随着大鼠肝纤维化进展阳性表达升高,IL-10对CCl4诱导的大鼠肝纤维化具有保护作用,可明显抑制纤维化的生成和沉积. 相似文献
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目的:探讨TGFβ_1在实验性肝纤维化过程中的表达状况及IL-10对肝纤维化大鼠转化生长因子β_1(TGFβ_1)表达的影响。方法:建立大鼠肝纤维化模型并行IL-10干预实验。从正常对照组(C组)和CCl_4诱导肝纤维化模型组(M组)及IL-10干预肝纤维化组(T组)中取肝脏组织,采用S-P免疫组织化学方法检测分析不同组大鼠在肝纤维化进程的不同阶段肝组织中TGFβ_1表达的情况。结果:成功建立大鼠肝纤维化模型;随着肝纤维化程度的加重,TGFβ_1在肝组织中阳性表达明显增强;经Ridit分析,C组与M组间TGFβ_1阳性表达水平有显著性差异(P<0.01);T组TGFβ_1阳性表达较M组明显减弱,经Ridit分析,组间差异有显著性(P<0.01)。结论:TGFβ_1的阳性表达随着肝纤维化程度的进展升高,外源性IL-10对CCl_4诱导的肝纤维化中TGFβ_1的表达具有明显拮抗作用。 相似文献
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Nobuyuki Kikuchi MD Yasuo Yamaguchi MD Katsutaka Mori MD Noboru Takata MD Mataro Goto MD Yasuhiro Makino MD Hiromitsu Hamaguchi MD Naoya Hisama MD Dr. Michio Ogawa MD 《Digestive diseases and sciences》1993,38(8):1492-1499
These experiments were undertaken to study the effects of cyclosporine A (CsA) on liver regeneration after an isogeneic orthotopic reduced-size hepatic transplantation (RSHT) in rats. Male Wistar rats were treated with or without a daily injection of CsA beginning 24 hr before surgery and were subjected to a 68% partial hepatectomy. A isogeneic orthotopic reduced-size hepatic transplantation was performed in recipient rats pretreated with or without CsA. A daily injection of CsA was continued until the recipient rats were sacrificed. Animals were sacrificed at various time points (12, 24, 36, 48, and 72 hr) postoperatively. The incorporation of bromodeoxyuridine (BrdU) into the DNA of the remnant hepatocytes was evaluated by immunohistochemical staining with a monoclonal antibody against BrdU. CsA (10 mg/kg/day) significantly augmented BrdU incorporation into hepatocytes after hepatectomy. The maximum labeling index (LI) was observed at 24 hr after hepatectomy. In contrast, the maximum LI in the recipient rats not receiving CsA was seen at 36 hr after RSHT, and 10 mg/kg/day of CsA decreased the LI at 36 hr after RSHT. A lower dose of CsA (3 mg/kg/day), however, significantly increased the LI in the recipient rats (P<0.01), and it reached a peak at 24 hr after RSHT when compared to the transplant recipients not receiving CsA. The time course of the increase in the LI in the transplant recipient rats receiving 3 mg/kg/day of CsA was similar to that observed in the rats after hepatectomy. This dosage improved the delay in the reduced-size hepatic transplant LI reaching its peak. These findings suggest that after RSHT the liver graft is more sensitive to both hepatotrophic and hepatotoxic effects of CsA.This work was supported in part by Mika Fund. 相似文献
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目的 探讨白细胞介素10(IL-10)基因修饰骨髓源性肝干细胞(BDLSC)移植对大鼠纤维化肝脏的炎症反应和肝再生的影响. 方法 雌性Wistar大鼠50只随机分为4组:(1)正常组(10只):皮下注射橄榄油3 ml/kg,2次/周,首剂加倍,共注射8周;(2)模型组(16只):皮下注射体积分数40%CCl_4和橄榄油(CCl_4:橄榄油=2:3),3 ml/kg,注射次数和时间同正常组,于第4周末经门静脉分支输注1 ml无菌等渗盐水(NS);(3)BDLSC组(12只):造模方法 同模型组,于第4周末经门静脉分支输注BDLSC 1 ml(每毫升NS含BDLSC 2×10~5个),后续处理同模型组,(4)BDLSC/IL-10组(12只):造模方法 同模型组,于第4周末经门静脉分支输注IL-10基因修饰BDLSC 1 ml(每毫升NS含BDLSC 2×10~5个),后续处理同模型组.大鼠于造模第8周末处死,留取肝组织备用.采用酶联免疫吸附法检测肝组织IL-10,肿瘤坏死因子α含量,采用苏木素-伊红染色法观察肝组织病理学改变情况;分别采用实时定量PCR法和免疫组织化学法检测肝组织肝细胞生长因子mRNA和增殖细胞核抗原蛋白的表达.根据不同资料采用方差分析或Kruskal-Wallis检验进行统计学分析. 结果 BDLSC能顺利种植于肝内,并至少维持4周.大鼠肝组织的IL-10/TNF α比值,模型组为0.05±0.01,正常组为0.26±0.04(F=57.538,P<0.01),BDLSC/IL-10组为0.68±0.21,BDLSC组为0.08±0.03,模型组比正常组明显降低,BDLSC/IL-10组比正常组明显升高.单纯BDLSC移植未能改善IL-10/TNF α比值降低情况.模型组大鼠肝组织病理学改变明显,炎症反应重,BDLSC组炎症有所减轻,BDLSC/IL-10组的肝组织形态接近正常组.模型组大鼠肝组织的肝细胞生长因子mRNA和增殖细胞核抗原蛋白表达增强,分别为0.0049±0.0009和8511.80±4560.34,F值分别为84.945和82.376,P值均<0.01.BDLSC组二者表达进一步增强,分别为0.0145±0.0022和15 785.21±6431.66,,值分别为84.945和82.376,P值均<0.01,BDLSC/IL-10组较BDLSC组增强更明显,分别为0.0684±0.0190和44 371.43±13 865.65,F值分别为84.945和82.376,P值均<0.01,差异有统计学意义.结论 IL-10基因修饰BDLSC移植能减轻纤维化肝脏的炎症反应,促进肝再生,为有效治疗肝纤维化提供了依据. 相似文献
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目的研究实验性肝纤维化大鼠肝星状细胞白介素10(IL-10)/白介素10受体(IL-10R)表达及IL-10干预对其表达的影响。方法60只清洁级SD大鼠,随机分为正常对照(A组)、肝纤维化(B组)和IL-10干预组(C组)。B组和C组以CCl4腹腔内注射构建肝纤维化模型,C组并予IL-10腹腔内注射干预造模。于第7周和第11周分别随机选取一批大鼠,分离肝星状细胞,抽提总RNA,以半定量RT-PCR法检测各组HSC中IL-10和IL-10R mRNA表达情况。结果病理组织学证实肝纤维化模型构建成功,原代HSC分离培养成功,IL-10干预可以减轻其肝纤维化程度。肝纤维化时IL-10和IL-10R的mRNA表达均较正常组有所增强,但随着肝纤维化进展,IL-10的表达逐渐减弱。IL-10干预可以使二者的表达上调,以第11周时变化最为显著。结论大鼠肝HSC可表达IL-10及IL-10R,IL-10可作用于HSC而发挥抗肝纤维化作用。 相似文献
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目的 :探讨白细胞介素 10 (IL 10 )基因转染对小鼠心脏移植排斥反应中IL 12、IL 15、IL 18和IL 4表达的影响。方法 :采用小鼠颈部心脏移植模型 ,随机分为 3组 :对照组、移植组和IL 10组。于术后第 5天取移植心脏 ,用逆转录聚合酶链式反应 (RT PCR)法观察IL 12、IL 15、IL 18、IL 4及IL 10的表达情况。结果 :移植组IL 12、IL 15、IL 18表达与对照组比较明显升高 ,IL 10、IL 4表达显著降低 (均P <0 .0 1)。IL 10组IL 12、IL 15、IL 18表达与移植组比较明显降低 ,而IL 4及IL 10表达显著升高 (均P <0 .0 1)。结论 :IL 10基因转染抑制心脏移植排斥反应主要与其抑制IL 12、IL 15、IL 18等Th1型细胞因子的表达 ,促进Th2型细胞因子IL 4的表达 ,使免疫反应由Th1型向Th2型偏移有关 相似文献
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Eirini Pantazi Mohamed Bejaoui Mohamed Amine Zaouali Emma Folch-Puy Anabela Pinto Rolo Arnau Panisello Carlos Marques Palmeira Joan Roselló-Catafau 《World journal of gastroenterology : WJG》2015,21(26):8021-8031
AIM: To investigate a possible association between losartan and sirtuin 1(SIRT1) in reduced-size orthotopic liver transplantation(ROLT) in rats.METHODS: Livers of male Sprague-Dawley rats(200-250 g) were preserved in University of Wisconsin preservation solution for 1 h at 4 ℃ prior to ROLT.In an additional group,an antagonist of angiotensin Ⅱ type 1 receptor(AT1R),losartan,was orally administered(5 mg/kg) 24 h and 1 h before the surgical procedure to both the donors and the recipients.Transaminase(as an indicator of liver injury),SIRT1 activity,and nicotinamide adenine dinucleotide(NAD+,a co-factor necessary for SIRT1 activity) levels were determined by biochemical methods.Protein expression of SIRT1,acetylated Fox O1(ac-Fox O1),NAMPT(the precursor of NAD+),heat shock proteins(HSP70,HO-1) expression,endoplasmic reticulum stress(GRP78,IRE1 a,p-e IF2) and apoptosis(caspase 12 and caspase 3) parameters were determined by Western blot.Possible alterations in protein expression of mitogen activated protein kinases(MAPK),such as p-p38 and p-ERK,were also evaluated.Furthermore,the SIRT3 protein expression and m RNA levels were examined.RESULTS: The present study demonstrated that losartan administration led to diminished liver injury when compared to ROLT group,as evidenced by the significant decreases in alanine aminotransferase(358.3 ± 133.44 vs 206 ± 33.61,P 0.05) and aspartate aminotransferase levels(893.57 ± 397.69 vs 500.85 ± 118.07,P 0.05).The lessened hepatic injury in case of losartan was associated with enhanced SIRT1 protein expression and activity(5.27 ± 0.32 vs 6.08 ± 0.30,P 0.05).This was concomitant with increased levels of NAD+(0.87 ± 0.22 vs 1.195 ± 0.144,P 0.05) the co-factor necessary for SIRT1 activity,as well as with decreases in ac-Fox O1 expression.Losartan treatment also provoked significant attenuation of endoplasmic reticulum stress parameters(GRP78,IRE1 a,p-e IF2) which was consistent with reduced levels of both caspase 12 and caspase 3.Furthermore,losartan administration stimulated HSP70 protein expression and attenuated HO-1 expression.However,no changes were observed in protein or m RNA expression of SIRT3.Finally,the protein expression pattern of p-ERK and p-p38 were not altered upon losartan administration.CONCLUSION: The present study reports that losartan induces SIRT1 expression and activity,and that it reduces hepatic injury in a ROLT model. 相似文献
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大鼠肝再生增强因子假基因的克隆化与序列分析 总被引:14,自引:0,他引:14
目的 研究大鼠肝再生增强因子(augmenter of liver regeneration,ALR)在大鼠基因组织中的存在方式。方法 以大鼠基因组DNA为模板,根据ALP cDNA序列设计引物,用多聚酶链反应(PCR)扩增产物,连入pGEM Teasy Vector后测序。结果 PCR法扩增出两条产物,其一经测序发现为ALR的假基因,预测氨基酸序列与ALR的同源性为88.8%。结论 作为肝细胞再生过程中重要的生长刺激因子,大鼠ALR存在假基因,提示可能存在ALR多基因家族。为研究ALR分子的进货规律提供了依据。 相似文献
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Gomez D Homer-Vanniasinkam S Graham AM Prasad KR 《World journal of gastroenterology : WJG》2007,13(5):657-670
Liver ischaemic preconditioning (IPC) is known to protect the liver from the detrimental effects of ischaemic-reperfusion injury (IRI), which contributes significantly to the morbidity and mortality following major liver surgery. Recent studies have focused on the role of IPC in liver regeneration, the precise mechanism of which are not completely understood. This review discusses the current understanding of the mechanism of liver regeneration and the role of IPC in this setting. Relevant articles were reviewed from the published literature using the Medline database. The search was performed using the keywords "liver", "ischaemic reperfusion', "ischaemic preconditioning", "regeneration", "hepatectomy" and "transplantation". The underlying mechanism of liver regeneration is a complex process involving the interaction of cytokines, growth factors and the metabolic demand of the liver. IPC, through various mediators, promotes liver regeneration by up-regulating growth-promoting factors and suppresses growth-inhibiting factors as well as damaging stresses. The increased understanding of the cellular mechanisms involved in IPC will enable the development of alternative treatment modalities aimed at promoting liver regeneration following major liver resection and transplantation. 相似文献