camp 抑制剂大鼠 灌胃:TLR4抑制剂对糖尿病周围神经痛模型大鼠的医治效果

来源: 2018-11-11 15:03

鲁义++++++姚嘉茵++++++尧新华++++++卿朝晖++++++童辉4++++刘玲

[摘要] 意图 评论Toll样受体4(TLR4)抑制剂TAK-242对糖尿病周围神经痛(DPN)模型大鼠的医治作用及其可能的作用机制。 办法 SPF级雄性SD大鼠60只,随机均分为3组,别离为正常对照组(NC组)、DPN模型组(DPN组)、TAK-242医治组(TAK组)。选用链脲佐菌素(STZ)办法树立DPN大鼠模型,选用ELISA及RT-PCR办法检测DPN模型大鼠腰膨大脊髓安排的高迁移率族蛋白B1(HMGB1)-TLR4轴上下流基因(HMGB1、TLR4、MAPK、NF-κB、IL-6)的改动,剖析上述细胞因子表达水平与大鼠痛苦行为的相关性。运用TLR4抑制剂TAK-242对DPN模型大鼠进行药物干涉,调查其医治作用及对HMGB1-TLR4轴基因表达的影响。 成果 ELISA检测显现,DPN组大鼠的血清HMGB1、TLR4、IL-6表达水均匀较NC组升高(P<0.05);TAK组大鼠的TLR4及IL-6表达水平较DPN组下降(P<0.05)。RT-PCR检测显现,DPN组大鼠的HMGB1、TLR4、NF-κB、IL-6 mRNA表达水平较NC组升高(P<0.05);TAK组大鼠的TLR4、NF-κB、IL-6 mRNA表达水平较DPN组下降(P<0.05)。 定论 TLR4抑制剂TAK-242经过阻断HMGB1-TLR4轴对DPN模型动物起医治作用。

[关键词] TLR4;TAK-242;HMGB1-TLR4;糖尿病周围神经痛

[中图分类号] R587.2 [文献标识码] A [文章编号] 1674-4721(2016)02(a)-0009-04

Therapeutic effect of TAK-242 on diabetic peripheral neuropathic pain rats

LU Yi1 YAO Jia-yin2 YAO Xin-hua1▲ QING Zhao-hui1 TONG Hui1 LIU Ling1

1.Department of Anesthesiology,Guangzhou Hospital of Traditional Chinese Medicine,Guangzhou 510130,China;2.Department of Gastroenterology,the Sixth Hospital Affiliated to Sun Yat-Sen University,Guangzhou 510655,China

[Abstract] Objective To investigate the therapeutic effect and possible mechanisms of TLR4 inhibitor named TAK-242 on the diabetic peripheral neuropathic (DPN) rat model. Methods 60 male SD rats with SPF level were randomly divided into 3 groups, such as normal control group (NC group), DPN model group (DPN group),TAK-242 treatment group (TAK group).DPN rat models were established by using the method of streptozocin (STZ),and behavior analysis were made.Expressions of HMGB1-TLR4 related genes such as HMGB1,TLR4,MAPK,NF-κB and interleukin-6 (IL-6) were determined by RT-PCR.Correlations of genes mentioned above and the pain behavior of rats were analyzed.TLR4 inhibitor named TAK-242 was used for drug intervention.Its therapeutic effect and the effect on the expressions of HMGB1-TLR4 axis were observed. Results There was a significant increase in the spontaneous behavior and decrease in the pain threshold of rats in DNP group compared with NC group (P<0.05).The serum expression of TLR4 and IL-6 in DNP group was significantly higher than those in NC group (P<0.05),and the expression of IL-6 and TLR4 in the TAK group was decreased compared with the model group as detected by ELISA (P<0.05).The expressions of HMGB1,TLR4,NF-κB and IL-6 mRNA in DNP group was significantly higher than those in NC group (P<0.05),and the mRNA expression of TLR4,NF-κB and IL-6 in TAK group was decreased compared with DNP group as detected by RT-PCR (P<0.05). Conclusion By blocking the HMGB1-TLR4 axis,TLR4 inhibitor TAK-242 plays a role of therapeutic effect in the treatment on DPN rats.

[Key words] TLR4;TAK-242;HMGB1-TLR4;Diabetic peripheral neuropathic

在糖尿病患者中约20%的患者兼并有糖尿病周围神经病变,占糖尿病神经病变的50%[1-2],其间糖尿病周围神经痛(diabetic peripheral neuropathy,DPN)发病率为13%~26%[3-4]。最新研讨以为DPN的发作、开展与全身缓慢炎性反响密切相关,特别周围神经部分免疫功用反常、细胞因子信号传导轴反常相关[5]。其间,高迁移率族蛋白B1(high mobility group box-1 protein,HMGB1)-Toll样受体4(Toll-like receptor 4,TLR4)轴可能是神经免疫性损害的中心病因[6]。本研讨拟评论HMGB1-TLR4轴在DPN发病机制中的作用,运用TLR4抑制剂TAK-242阻断HMGB1-TLR4轴,调查其对DPN的医治作用。

1 材料与办法

1.1 试验动物

雄性SD大鼠60只,SPF级,体质量180~220 g,由中山大学痛苦医治中心供给;安排专人选用专用饲料和水进行喂食。试验动物质量合格证:SCXK(粤)2009-0011。试验动物设备运用证:编号0044336。

1.2动物分组

60只大鼠随机均分为3组,别离设为正常对照组(normal control group,NC组)、DPN模型组(DPN model group,DPN组)、TAK-242医治组(TAK-242 treatment group,TAK组)。

1.3动物模型的树立

选用链脲佐菌素(STZ)法树立模型。大鼠自动物试验中心取回,禁食不由水24 h。大鼠禁食12 h后称重,依照55 mg/kg一次性腹腔打针STZ溶液(美国Sigma公司)。腹腔打针48 h后用血糖剖析仪测定大鼠尾静脉血糖,空腹血糖>16.7 mmol/L的大鼠为成功的DPN模型大鼠,共得到40只(其间DPN组20只,TAK组20只)。正常对照组则腹腔打针相同剂量枸橼酸/枸橼酸钠缓冲液,共得到20只。

1.4 干涉办法

TAK组大鼠,在造模前1天,造模后第1、7天别离按大鼠体重给予腹腔打针3 mg/kg TAK-242[4](购自美国Takeda公司)。NC组与DPN组别离在相同时刻腹腔打针3 mg/kg的生理盐水。造模后第14天完毕试验,一切大鼠均麻醉下处死,心脏打针取血,离心后取血清至-4℃冰箱贮存;快速取出腰膨大,运用4%多聚甲醛固定,预备行免疫组化检测。留取腰膨大安排2~3 g,置于去RNA酶的Eppendorf管中,经液氮后转至-70℃冰箱,用于RT-PCR检测。

1.5行为学剖析

调查大鼠有无自发性痛苦行为。造模后第1、7、14天,在室温(24±1)℃的舒适、安静环境下调查大鼠的歩态和后肢的抬脚、护卫姿态、舔脚、腿的着地性或抗重力行为,以及是否有自残形为。

1.6 ELISA检测

根据试剂盒阐明书操作(HMGB1、TLR4、MAPK、NF-κB及IL-6的ELISA试剂盒,均购自美国Invitrogen公司)。检测各组大鼠血清HMGB1、TLR4、MAPK、NF-κB及IL-6的含量水平。

1.7 RT-PCR

取大鼠腰膨大脊髓安排,按Trizol试剂阐明书提取肝脏总RNA。选用紫外分光光度计测定总RNA样品的浓度和纯度。取2 g总RNA为模板,回转录成cDNA。PCR反响条件:预变性94℃ 5 min,变性94℃ 30 s,退火59℃ 30 s。延伸72℃ 1 min。30个循环后,72℃再延伸10 min。再取5 μl PCR反响产品,1.5%琼脂糖凝胶电泳摄影。选用Quantity One软件核算待测蛋白的基因和β-actin扩增片断的扫描密度比值。

1.8计算学办法

选用计算软件SPSS 13.0对试验数据进行剖析,计量材料以均数±标准差(x±s)标明,组间差异选用单因素方差剖析,以P<0.05为差异有计算学含义。

2 成果

2.1 各组大鼠的一般状况

NC组大鼠毛色有光泽,精力好,爱活动,食量、粪便均正常。DPN组大鼠自试验造模后,活动量削减,精力精神萎顿。TAK组大鼠活动稍差,毛色稍暗,大小便无反常,均无逝世。

2.2各组大鼠行为学的改动

DPN组大鼠自造模第2天开端呈现痛觉步态,采纳护卫姿态、舔脚等自发行为,造模第14天到达顶峰。TAK组大鼠自发行为较DPN组少,第3次打针干涉药物后自发行为显着削减。各组大鼠试验进程没有调查到大鼠有自残行为。

2.3 各组大鼠血清中HMGB1、TLR4、MAPK、NF-κB、IL-6的表达量测定

DPN组大鼠血清中的HMGB1、TLR4、IL-6 mRNA表达均较NC组升高,差异有计算学含义(P<0.05)。TAK组的TLR4、IL-6 mRNA表达较DPN组下降,差异有计算学含义(P<0.05)。 三组大鼠的MAPK、NF-κB mRNA表达差异无计算学(P>0.05)(图1)。

2.4 各组大鼠腰膨大脊髓安排中HMGB1、TLR4、MAPK、NF-κB、IL-6 mRNA的表达量测定

DPN组的HMGB1、TLR4、NF-κB、IL-6 mRNA表达均较NC组升高,差异有计算学含义(P<0.05)。TAK组的TLR4、NF-κB、IL-6 mRNA表达较DPN组下降,差异有计算学含义(P<0.05)。各组大鼠的MAPK mRNA表达差异无计算学含义(P>0.05)(图2)。

3 评论

现在普遍以为DPN的发病与高血糖及由此带来的一系列代谢紊乱关系密切。国内外研讨也标明该病的发作、开展与全身缓慢炎性反响密切相关,特别与周围神经部分免疫功用反常、细胞因子信号传导轴反常相关[7-8]。

HMGB1是关节炎、癌症、本身免疫性疾病和糖尿病发病的关键性中心物质。研讨标明,HMGB1在糖尿病患者血浆中水平较高,且HMGB1表达水平与血糖水平凹凸呈正相关[9-10]。TLR是宿主反抗病原菌侵略的首要辨认和信号传递受体,而TLR4基因缺失小鼠,其神经超敏性下降、脊髓胶质细胞活性和促炎性因子表达也下降[11-12]。在核内,HMGB1与DNA结合,活化下流两种不同信号通路激活——MAPK,NF-κB通路。NF-κB的活化引起IL-6等促炎症因子的组成和开释,如TNF-α和IL-1β,而MAPK通路激活在调理神经元重塑方面有重要作用[13-15]。本研讨显现,DPN模型大鼠中血清中的HMGB1、TLR4、IL-6表达量及mRNA表达水均匀较NC组升高,差异有计算学含义(P<0.05),阐明HMGB1-TLR4在DNP的发病机制中起重要作用。

现阶段,DPN的医治手法十分有限,在操控血糖的基础上,传统医治药物包含抗抑郁药、抗惊厥药、抗痉挛药及其他改进部分血流的药物联合运用[16-18]。近年来,比较受重视的是靶向医治[19-20]。笔者选用TLR4抑制剂TAK-242对大鼠进行干涉,成果显现TAK组的大鼠体内TLR4、IL-6 mRNA较DPN组下降,提示TLR4抑制剂TAK-242能够有用阻断HMGB1-TLR4,中止促炎因子的开释及其对机体的损害,估测可将其作为一种有用的分子靶向医治办法,为临床医治药物的研讨与拓宽供给试验根据。

[参考文献]

[1] 伍雪英,刘玲,龚玉来.加巴喷丁医治糖尿病性神经痛30例效果调查[J].临床麻醉学杂志,2008,24(1):66-67.

[2] Souza M,Kulkarni V,Bhaskaran U,et al.Diabetic peripheral neuropathy and its determinants among patients attending a tertiary health care centre in mangalore[J].J Public Health Res,2015,4(2):450-448.

[3] Kessler JA,Smith AG,Cha BS,et al.Double-blind,placebo-controlled study of HGF gene therapy in diabetic neuropathy[J].Ann Clin Transl Neurol,2015,2(5):465-478.

[4] 鲁义,屠伟峰,尧新华,等.两种术后镇痛方法对晚年髋关节置换术患者炎性因子表达的影响[J].有用医学杂志,2014,30(23):3755-3758.

[5] Sadosky A,Mardekian J,Parsons B,et al.Healthcare utilization and costs in diabetes relative to the clinical spectrum of painful diabetic peripheral neuropathy[J].J Diabetes Complications,2015,29(2):212-217.

[6] Zhang Y,Karki R,Igwe OJ.Toll-like receptor 4 signaling:a common pathway for interactions between prooxidants and extracellular disulfide high mobility group box 1 (HMGB1) protein-coupled activation[J].Biochem Pharmacol,2015,98(1):132-143.

[7] Hua F,Tang H,Wang J,et al.TAK-242,an antagonist for Toll-like receptor 4,protects against acute cerebral ischemia/reperfusion injury in mice[J].J Cereb Blood Flow Metab,2015,35(4):536-542.

[8] Mitro N,Cermenati G,Brioschi E,et al.Neuroactive steroid treatment modulates myelin lipid profile in diabetic peripheral neuropathy[J].J Steroid Biochem Mol Biol,2014,143(9):115-121.

[9] Wang WK,Lu QH,Zhang JN,et al.HMGB1 mediates hyperglycaemia-induced cardiomyocyte apoptosis via ERK/Ets-1 signalling pathway[J].J Cell Mol Med,2014,18(11):2311-2320.

[10] Abu El-Asrar AM,Nawaz MI,Siddiquei MM,et al.High-mobility group box-1 induces decreased brain-derived neurotrophic factor-mediated neuroprotection in the diabetic retina[J].Mediators Inflamm,2013,5(20):863-866.

[11] Cejkova P,Nemeckova I,Broz J,et al.TLR2 and TLR4 expression on CD14++ and CD14+ monocyte subtypes in adult-onset autoimmune diabetes[J].Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub,2015,5(4):110-116.

[12] Good DW,George T,Watts BA.High-mobility group box 1 inhibits HCO3- absorption in medullary thick ascending limb through a basolateral receptor for advanced glycation end products pathway[J].Am J Physiol Renal Physiol,2015,309(8):720-730.

[13] Lee WH,Wu HH,Huang WJ,et al.N-hydroxycinnamide derivatives of osthole ameliorate hyperglycemia through activation of AMPK and p38 MAPK[J].Molecules,2015, 20(3):4516-4529.

[14] Tang X,Deng L,Xiong H,et al.Expression profile of mitrogen-activated protein kinase (MAPK) signaling genes in the skeletal muscle & liver of rat with type 2 diabetes:role in disease pathology[J].Indian J Med Res,2014,140(6):744-755.

[15] Neacsu P,Mazare A,Schmuki P,et al.Attenuation of the macrophage inflammatory activity by TiO2 nanotubes via inhibition of MAPK and NF-κB pathways[J].Int J Nano-medicine,2015,12(10):6455-6467.

[16] Liao C,Zhang W,Yang M,et al.Surgical decompression of painful diabetic peripheral neuropathy:the role of pain distribution[J].PLoS One,2014,9(10):342-348.

[17] Kluding PM,Pasnoor M,Singh R,et al.The effect of exercise on neuropathic symptoms,nerve function,and cutaneous innervation in people with diabetic peripheral neuropathy[J].J Diabetes Complication,2012,26(5):424-429.

[18] Russo GT,Giandalia A,Romeo EL,et al.Diabetic neuropathy is not associated with homocysteine,folate,vitamin B12 levels,and MTHFR C677T mutation in type 2 diabetic outpatients taking metformin[J].J Endocrinol Invest,2015,8(2):312-321.

[19] Kiani J,Sajedi F,Nasrollahi SA,et al.A randomized clinical trial of efficacy and safety of the topical clonidine and capsaicin in the treatment of painful diabetic neuropathy[J].J Res Med Sci,2015,20(4):359-363.

[20] Tang F,Xing XW,Chu JM,et al.A highly sensitive fluorescence assay for methyltransferase activity by exonuclease-aided signal amplification[J].Analyst,2015,140(13):4636-4641.

(收稿日期:2015-10-30 本文修改:卫 轲)

根据您访问的内容,您可能还对以下内容感兴趣,希望对您有帮助:

首页 > 营养

显示全文