2-(2-苯并呋喃基)-2-咪唑啉对实验性自身免疫性脑脊髓炎小鼠脊髓胶质纤维酸性蛋白表达的影响

目的探讨咪唑啉Ⅱ类受体(I2R)高选择性配体2-(2-苯并呋喃基)-2-咪唑啉(2-BFI)对实验性自身免疫性脑脊髓炎(EAE)小鼠脊髓胶质纤维酸性蛋白(GFAP)表达的影响。方法 C57BL/6小鼠30只,随机分成EAE组、2-BFI组和对照组,每组10只。EAE组及2-BFI组给予皮下注射抗原液诱导为EAE模型;2-BFI组同日起腹腔注射2-BFI共14 d。各组每日进行2次神经功能缺损评分;第19 d进行脊髓病理学检查,免疫组化法观察脊髓炎症细胞浸润、髓鞘脱失程度及GFAP表达。结果 2-BFI组神经功能缺损评分(4.17±3.65)明显低于EAE组(10.41±3.02)(P<0.01);脊髓病理评分(1.10±0.59)较EAE组(2.38±0.86)显著减少(P<0.01);GFAP阳性细胞数[(18.83±2.31)个/HP]明显多于EAE组[(12.25±2.66)个/HP](P<0.05)。结论 2-BFI能减缓小鼠EAE疾病发展,可能与促进中枢神经系统中GFAP的表达有关。     

2-BFI、阿米洛利和咪唑克生对实验性自身免疫性脑脊髓炎小鼠行为学和病理学变化的药效作用比较

目的比较3种咪唑啉Ⅱ类受体(I2R)高选择性配体2-(2-苯并呋喃基)-2-咪唑啉(2-BFI)、阿米洛利和咪唑克生对实验性自身免疫性脑脊髓炎(EAE)模型小鼠行为学和病理学变化的干预效果。方法在相同实验条件下,髓鞘少突胶质细胞糖蛋白35-55多肽诱导EAE小鼠模型后,分为空白对照组、EAE-生理盐水组、EAE-2-BFI组(2-BFI干预)、EAE-阿米洛利组(阿米洛利干预)、EAE-咪唑克生组(咪唑克生干预),每组8只。均采用经实验证实的有效剂量,用动物神经功能评分评价各组间小鼠行为学表现。苏木精-伊红染色和LFB髓鞘染色,观察中枢组织炎性细胞浸润和髓鞘脱失程度。结果 3个不同配体干预组小鼠的神经行为学和炎症病理学改变与EAE-生理盐水组比较均明显减轻,差异有显著统计学意义(P0.01);而3个不同干预组之间的行为学和病理学变化比较无显著差异,2-BFI保护作用具微弱优势。结论 2-BFI、阿米洛利和咪唑克生均能明显减缓小鼠EAE发生与发展,均具有较好抑制中枢炎症反应的药理作用,3者间的药效作用强度未见明显差异。     

2-(2-苯并呋喃基)-2-咪唑啉对实验性自身免疫性脑脊髓炎小鼠小胶质细胞活化及氧化应激的影响

目的观察2-(2-苯并呋喃基)-2-咪唑啉(2-BFI)对实验性自身免疫性脑脊髓炎(EAE)小鼠CNS小胶质细胞活化及氧化应激的影响。方法将27只C57BL/6小鼠随机分为正常对照组、EAE组和2-BFI干预组,每组9只。采用MOG_(35-55)免疫法制作经典EAE模型。2-BFI干预组小鼠于EAE造模后当日起腹腔注射2-BFI 20 mg/kg,2次/d,连续14 d。正常对照组和EAE组以等量生理盐水代替。每日观察并记录动物的行为学变化、进行神经功能缺损评分。免疫后第20 d处死各组小鼠,采用HE染色和LFB染色观察组织学变化;免疫组化法测定诱导型小鼠CNS中一氧化氮合成酶(iNOS)蛋白和离子钙接头分子(Iba-1)的表达,比色法检测丙二醛(MDA)的含量;并对活化的小胶质细胞数量和iNOS蛋白表达水平进行线性相关分析。结果正常对照组小鼠未见神经系统受损的表现。与EAE组相比,2-BFI干预组日均神经功能缺损评分明显降低,CNS脊髓炎性细胞浸润明显减少,髓鞘脱失严重程度明显减轻,活化的小胶质细胞数量减少,iNOS蛋白表达明显减少,MDA含量降低(P0.05~0.01)。相关分析结果显示,iNOS表达水平与活化的小胶质细胞数量呈正相关(r=0.596,P0.01)。结论 2-BFI能减轻EAE小鼠临床症状和组织学改变,2-BFI对EAE小鼠的神经保护作用于小胶质细胞激活和减轻氧化应激相关。     

2-BFI对EAE小鼠血脑屏障通透性和AQP4 mRNA表达的影响

目的观察2-(2-苯并呋喃基)-2-咪唑啉(2-BFI)对实验性自身免疫性脑脊髓炎(EAE)小鼠血脑屏障和水通道蛋白4(AQP4)mRNA表达的影响。方法 C57BL/6小鼠39只随机分为正常对照组、EAE组和2-BFI干预组。各组每日进行神经功能缺损评分;第20天进行病理学检查;伊文思蓝荧光定量方法检测血脑屏障通透性;电子显微镜观察血脑屏障的超微结构变化;Real-time PCR法测定AQP4 mRNA的表达水平。结果与EAE组比较,2-BFI干预组小鼠神经功能缺损及血脑屏障病理损伤减轻,AQP4 mRNA的表达水平明显降低,均差异有统计学意义。结论 2-BFI对EAE小鼠的神经保护作用与减少AQP4 mRNA的表达、减轻血脑屏障通透性有关。     

实验性自身免疫性脑脊髓炎小鼠脑内主要组织相容性复合体Ⅱ类抗原和分化群3ε的变化

目的观察实验性自身免疫性脑脊髓炎(EAE)小鼠脑内主要组织相容性复合体Ⅱ类抗原(MHC-Ⅱ)和分化群3ε(CD3ε)的变化。方法 25只C57BL/6小鼠随机分为EAE组(n=13)和正常对照组(n=12)。应用髓鞘少突胶质细胞糖蛋白35-55抗原诱导小鼠EAE模型。观察记录小鼠行为学变化;采用常规及髓鞘染色方法观察脊髓损伤和炎症细胞浸润程度;荧光定量PCR检测脑MHC-Ⅱ和CD3εmRNA的表达。结果 EAE组小鼠发病后EAE症状评分逐渐增加;脊髓炎症细胞浸润明显;髓鞘脱失较多;脑组织MHC-Ⅱ和CD3εmRNA表达显著高于正常对照组(均P<0.01),并与EAE症状评分呈正相关。结论 EAE小鼠脑内MHC-Ⅱ及CD3εmRNA表达水平增高与其病情严重程度一致。     

咖啡因慢性干预对小鼠实验性自身免疫性脑脊髓炎影响的观察

目的：探讨不同剂量咖啡因慢性干预对小鼠实验性自身免疫性脑脊髓炎（EAE）的影响及其分子免疫学机制。方法：C57BL／6小鼠随机分为CFA阴性对照组,EAE阳性对照组,咖啡因饮水干预组（1mg·k-1,10mg·kg-1,30mg·kg-1）。使用髓鞘少突胶质细胞糖蛋白35-55（MOG35-55）抗原诱导小鼠EAE模型,咖啡因干预至EAE造模后第20天与对照组小鼠同期处死为止。观察小鼠行为学变化、中枢炎症细胞浸润和损害程度、检测中枢细胞因子IL-17、IFN—γ、TGF—β的mRNA表达含量。结果：咖啡因干预组,特别是30mg·kg-1组的病情严重程度减轻,中枢炎症细胞浸润程度下降,促炎因子表达降低,抑炎因子表达上升。结论：慢性咖啡因干预,可通过降低促炎因子的表达,升高抑炎因子的表达,减轻小鼠EAE的炎症损伤。     

经不同咪唑啉类药物长期处理后大鼠脑内I_2R密度及胶质纤维酸性蛋白的变化

目的:观察咪唑啉类药物长期处理后大脑组织中咪唑啉2受体(I_2R)密度和亲和力的变化以及对胶质纤维酸性蛋白(GFAP)表达的影响。方法:将大鼠随机分成生理盐水组、胍丁胺组、育亨宾组、咪唑克生组、左旋咪唑组及2-(2-苯并呋喃基)-2-咪唑啉(2-BFI)组,腹腔注射×2周。采用放射性配体结合试验检测大脑和脑干匀浆中I_2R B_(max)和K_d变化,免疫组化测定小脑和颈髓中GFAP的表达。结果:反映I_2R密度的B_(max)值,咪唑克生、2-BFI和左旋咪唑组较NS组分别上调了80%、93%和122%(均P<0.01)。反映受体亲和力的K_d值,各组间无明显差异。咪唑克生、2-BFI和左旋咪唑组中GFAP表达比生理盐水组明显增加(均P<0.01)。结论:咪唑克生、2-BFI和左旋咪唑表现为拮抗剂特性;I_2R可能参与调节GFAP表达。     

二甲双胍抑制Th17细胞反应对实验性自身免疫性脑脊髓炎小鼠保护作用

目的探讨实验性自身免疫性脑脊髓炎(EAE)小鼠应用二甲双胍(MET)干预,观察MET对EAE小鼠发病情况、神经功能评分的影响及其对小鼠体内Th17细胞反应的作用。方法以MOG35-55免疫雌性C57BL/6小鼠建立EAE模型。随机分成对照组、EAE组和MET治疗组,比较不同组小鼠神经功能评分。在发病高峰期,比较小鼠脊髓中炎性细胞浸润程度,脾细胞中Th17细胞比例,脾细胞培养上清及血清中IL-17A含量以及小鼠脾及脊髓中IL-17A、RORγt mRNA转录水平。结果与EAE组相比,MET治疗组发病率减低(P0.05),疾病严重程度减轻(P0.01);脾细胞中Th17细胞比例降低(P0.01),脾细胞培养上清及血清中IL-17A含量减少(P0.01);脾及脊髓组织中IL-17A、RORγt mRNA转录水平均降低(P0.01)。结论 MET通过抑制外周免疫器官及中枢神经系统的Th17细胞反应而对EAE小鼠起到保护作用。     

AMD3100、CXCR7抗体对自身免疫性脑脊髓炎大鼠脊髓和脾细胞SDF1α、CXCR4、CXCR7 mRNA表达的影响

目的研究AMD3100、CXCR7抗体对实验性自身免疫性脑脊髓炎(experimental autoimmune en-cephalomyelitis,EAE)大鼠脊髓和脾脏中趋化因子SDF1α及其受体CXCR4、CXCR7表达的影响。方法采用MBP68-86和完全福氏佐剂配置的完全抗原免疫Lewis大鼠制备EAE模型。将大鼠随机分为对照组、AMD3100组、CXCR7抗体组和EAE组,于免疫后第0、2、4、6天给予相应药物干预:AMD3100组按体质量2.5mg/kg腹腔注射AMD3100,CXCR7抗体组腹腔注射CXCR7抗体20μg/只,EAE组腹腔注射等量生理盐水。每天对大鼠进行神经功能评分,免疫后第15天行RT-PCR检测各组脊髓及脾脏中SDF1α、CXCR4、CXCR7mRNA表达,行HE染色观察大鼠脊髓组织病理变化。结果 (1)与对照组相比,EAE组大鼠脊髓血管周围有大量性炎细胞浸润,神经功能评分明显增加,AMD3100组、CXCR7抗体组和EAE组脊髓SDF1α、CXCR4、CXCR7 mRNA表达增加(P<0.01),脾细胞SDF1α、CXCR7 mRNA表达减少(P<0.01);(2)与EAE组相比,AMD3100组大鼠神经功能评分增加,脾细胞CXCR4、CXCR7 mRNA表达增加(P<0.01),脊髓SDF1α、CXCR4、CXCR7表达无统计学差异;(3)与EAE组相比,CXCR7抗体组大鼠神经功能评分增加,脾细胞SDF1α、CXCR4、CXCR7 mRNA表达增加(P<0.01),脊髓SDF1α、CXCR4、CXCR7 mRNA表达无统计学差异。结论 AMD3100和CXCR7抗体均能加重EAE病情,上调EAE脾细胞CXCR4和CXCR7 mRNA的表达。     

实验性自身免疫性脑脊髓炎小鼠血脑屏障通透性与紧密连接蛋白-5的变化

目的观察实验性自身免疫性脑脊髓炎(EAE)小鼠血脑屏障(BBB)通透性与紧密连接蛋白-5(claudin-5)表达的变化。方法 40只C57BL/6小鼠随机分为EAE组和正常对照组,应用髓鞘少突胶质细胞糖蛋白35-55诱导制作小鼠EAE模型,每日进行神经功能缺损评分。采用苏木精-伊红、髓鞘染色和免疫组化法观察炎症细胞浸润、髓鞘脱失及轴索损坏程度。伊文思蓝染色和Western blot法观察BBB通透性和claudin-5表达的变化。结果与正常对照组比较,EAE组小鼠神经功能缺损评分、炎症细胞浸润、髓鞘脱失、轴索损坏和BBB通透性均明显增加;而claudin-5表达显著降低(均P0.01)。BBB通透性的变化与平均神经功能缺损评分、炎症细胞浸润和轴索损坏均呈正相关(P0.01);而与claudin-5表达水平呈负相关(P0.05)。结论 EAE发病过程中claudin-5表达减少,可能导致BBB通透性增加,使外周大量的炎症反应细胞向中枢迁移,继而进一步加重中枢的炎症反应。     

The potential antidepressant-like effect of imidazoline I2 ligand 2-BFI in mice

The compound 2-(2-benzofuranyl)-2-imidazoline (2-BFI) is a 2-imidazoline derivative that selectively inhibits the in vitro activity of monoamine oxidase-A and it is also an imidazoline I(2) agonist. However, the antidepressant potential of this compound and its mechanism of action have not been well defined. Therefore, in this study we investigated the antidepressant-like effect of 2-BFI in mice. 2-BFI (100 and 300μmol/kg, s.c.) significantly reduced the immobility time on the tail suspension test (TST) without changing locomotion in the open field test. The reduced the immobility time of 2-BFI (100μmol/kg, s.c.) was confirmed with the forced swimming test (FST). The antidepressant-like effect of 2-BFI (100μmol/kg, s.c.) in the TST was prevented by pretreatment with idazoxan (0.4μmol/kg, i.p., a I(2) site antagonist), methysergide (4μmol/kg, i.p., a non-selective serotonergic receptor antagonist) and haloperidol (0.1μmol/kg, i.p., a non-selective dopaminergic receptor antagonist). The anxiolytic effect of 2-BFI was also evaluated, using the elevated plus-maze test. 2-BFI (300μmol/kg, s.c.) was able to significantly increase the % of number of entries and the % of time spent in the open arms, indicating that it possesses an anxiolytic effect at high doses. In conclusion, these results suggest that the antidepressant-like effect of 2-BFI might involve serotonergic, dopaminergic and imidazoline systems, and then the imidazoline site could represent a new pharmacological target for the treatment of depression.     

2-(2-Benzofuranyl)-2-imidazoline treatment within 5 hours after cerebral ischemia/reperfusion protects the brain

We previously demonstrated that administering 2-(2-benzofuranyl)-2-imidazolin(2-BFI), an imidazoline I2 receptor agonist, immediately after ischemia onset can protect the brain from ischemic insult. However, immediate administration after stroke is difficult to realize in the clinic. Thus, the therapeutic time window of 2-BFI should be determined. Sprague-Dawley rats provided by Wenzhou Medical University in China received right middle cerebral artery occlusion for 120 minutes, and were treated with 2-BFI(3 mg/kg) through the caudal vein at 0, 1, 3, 5, 7, and 9 hours after reperfusion. Neurological function was assessed using the Longa's method. Infarct volume was measured by 2,3,5-triphenyltetrazolium chloride assay. Morphological changes in the cortical penumbra were observed by hematoxylin-eosin staining under transmission electron microscopy. The apoptosis levels in the ipsilateral cortex were examined with terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling(TUNEL) assay. The protein expression of Bcl-2 and BAX was detected using immunohistochemistry. We found the following: Treatment with 2-BFI within 5 hours after reperfusion obviously improved neurological function. Administering 2-BFI within 9 hours after ischemia/reperfusion decreased infarct volume and alleviated apoptosis. 2-BFI administration at different time points after reperfusion alleviated the pathological damage of the ischemic penumbra and reduced the number of apoptotic neurons, but the protective effect was more obvious when administered within 5 hours. Administration of 2-BFI within 5 hours after reperfusion remarkably increased Bcl-2 expression and decreased BAX expression. To conclude, 2-BFI shows potent neuroprotective effects when administered within 5 hours after reperfusion, seemingly by up-regulating Bcl-2 and down-regulating BAX expression. The time window provided clinical potential for ischemic stroke by 2-BFI.     

载脂蛋白E拟肽对实验性变态反应性脑脊髓炎小鼠基质金属蛋白酶-9和基质金属蛋白酶组织抑制因子-1表达的影响

目的探讨载脂蛋白E(Apo E)拟肽对实验性变态反应性脑脊髓炎(EAE)小鼠基质金属蛋白酶-9(MMP-9)和基质金属蛋白酶组织抑制因子-1(TIMP-1)表达的影响。方法将30只雌性C57BL/6J小鼠随机分为Apo E拟肽组、EAE组和正常组,每组10只小鼠。EAE模型通过以髓鞘少突胶质细胞糖蛋白多肽35-55为抗原诱导。Apo E拟肽组在免疫后第2 d到30 d每隔2 d按5 mg/(kg·d)背部皮下注射Apo E拟肽。EAE组和正常组均以等体积生理盐水替代。免疫后第0~35 d每日对小鼠进行神经功能评分。免疫后第35d解剖小鼠,分离大脑和脊髓并行HE染色。采用免疫组化染色法检测各组小鼠大脑、脑干和脊髓的MMP-9和TIMP-1的表达。结果正常组小鼠均未发病。Apo E拟肽组、EAE组的小鼠全部发病,但各有1只小鼠发病后死亡。Apo E拟肽组与EAE组的发病潜伏期差异无统计学意义(P=0.72)。Apo E拟肽组的神经功能评分在峰值和慢性期(第35 d)均明显低于EAE组(均P0.05)。HE染色示,正常组未见炎症细胞浸润;EAE组小鼠大脑、脑干和脊髓均有不同程度的炎性细胞浸润,以脑干和脊髓较为明显;Apo E拟肽组小鼠CNS炎性细胞浸润相对于EAE组明显减少。EAE组小鼠大脑、脑干和脊髓的MMP-9表达均高于正常组(均P0.05)。Apo E拟肽组小鼠大脑和脊髓的MMP-9表达要明显低于EAE组(均P0.05),其中Apo E拟肽组小鼠中脑和脊髓的MMP-9表达与正常组相比无明显差异(均P0.05)。正常组小鼠脊髓TIMP-1的表达明显高于EAE组和Apo E拟肽组(均P0.05)。而Apo E拟肽组与EAE组小鼠大脑、脑干和脊髓TIMP-1表达的差异均无统计学意义(均P0.05)。结论 Apo E拟肽能通过抑制大脑和脊髓MMP-9的表达改善EAE小鼠的症状。     

实验性自身免疫性脑脊髓炎模型的建立和长期观察研究

目的 建立实验性自身免疫性脑脊髓炎小鼠模型(EAE)并长期观察研究.方法 C57BL/6小鼠30只,随机分为EAE模型组、PBS对照组和正常对照组.应用神经功能评分进行临床评估,通过HE和髓鞘染色观察组织病理变化.结果 小鼠在诱导后的12±3d急性起病,16±2d内达到高峰,严重度评分为3.2±0.6分.半年观察期内复发1次,复发率为25%.光镜下可见EAE组以脊髓组织病变为主,表现为大量炎性细胞浸润和白质脱髓鞘.结论 采用MOG_(35-55)诱导C57BL/6小鼠建立的模型既往被认为是一种慢性迁延EAE模型,本研究通过长期观察发现其存在缓解复发现象.

Abstract：

Objective To establish a mice model of experimental autoimmune encephalomyelitis (EAE) and perform a long term study. Methods C57BL/6 mice were immunized with 300μg MOG_(35-55) in complete Freund' s adjuvant (CFA) to establish EAE model in EAE group (n = 10). Mice in adjuvant group( n = 10)were treated with CFA without MOG_(35-55) and control group( n = 10)were treated with normal saline. The pathologic changes of the central nervous system were studied by HE staining and myelin staining. Results The clinic symptoms of EAE were present in the 12±3th day post-immunization,and went to the peek in the 16±2 th day post-immunization. The severity score was 3.2±0.6. One relapse was observed in the term of 6 months, and the rate was 25%. Light microscopy showed there were abundant inflammatory cells infiltrated especially in spinal cord tissues in EAE mice,with evident demyelination in white matter. Conclusion The relapse of this EAE model was observed in the study, though it was believed to be a chronic persistent model without relapse.     

Disruption of the beta2-integrin CD11d (alphaDbeta2) gene fails to protect against experimental autoimmune encephalomyelitis

The fourth member of the beta(2)-integrin family of adhesion molecules, CD11d (alpha(D)beta(2)), is expressed on a wide variety of immune cells, however its function in autoimmune diseases, including EAE remains unknown. We induced EAE in wild-type and CD11d(-/-) C57BL/6 mice using myelin oligodendrocyte glycoprotein (MOG(35-55)) peptide. The clinical course and histopathology of EAE were identical in both groups of mice throughout the disease course. There were no significant differences in the infiltration of leukocyte subsets into the central nervous system or in the production of cytokines from T cells isolated from the spleen or spinal cord from both groups of mice. Our data demonstrate that CD11d is not required for the development of EAE and, to date, is the only beta(2)-integrin molecule whose deletion does not result in attenuated disease.     

2-（2-苯并呋喃基）-2-咪唑啉对大鼠局灶性脑缺血再灌注损伤的初步观察

目的：初步观察咪唑啉I2受体的高选择性配体2-（2-苯并呋喃基）-2-咪唑啉（2-BFI）对大鼠局灶性脑缺血再灌注损伤的影响。方法：建立SD大鼠大脑中动脉局灶性脑缺血模型。在脑缺血后即通过大鼠尾静脉给予生理盐水、2-BFI或咪唑克生。通过2,3,5-三苯基氯化四唑染色检测梗死体积并评价大鼠的神经功能缺损。通过免疫组化方法检测caspase-3蛋白和原位细胞凋亡法检测缺血半暗带中凋亡神经细胞数。结果：在局灶性脑缺血24h后,2-BFI和咪唑克生都能够显著提高神经功能评分。给予2-BFI或咪唑克生都可以显著降低梗死体积、减少caspase-3阳性细胞数（P〈0．01）和凋亡细胞数（P〈0．05）。结论：2-BFI和咪唑克生对局灶性脑缺血再灌注损伤大鼠有神经保护作用,为脑卒中的治疗提供了新的治疗方法。     

肉苁蓉多糖通过Shh通路缓解EAE小鼠的临床症状

目的探讨音猬因子(Sonic hedgehog,Shh)通路在实验性自身免疫性脑脊髓炎(experimental autoimmune encephalomyelitis,EAE)小鼠发病过程中的作用,及肉苁蓉多糖(cistanche deserticola polysaccharide,CDPS)能否通过该通路缓解EAE小鼠临床症状。方法给予C57BL/6小鼠皮下注射髓鞘少突细胞糖蛋白35-55多肽(myelin oligodendrocyte glycoprotein 35-55,MOG35-55)抗原制备EAE动物模型。将60只小鼠随机分为正常对照组、EAE模型组、CDPS治疗组以及CDPS+Smo受体阻断剂环王巴明(cyc)治疗组(以下简称CDPS+cyc治疗组)4组,每组各15只。观察各组小鼠免疫注射后0~26d的临床症状评分,采用勒克斯光蓝染色(Luxol Fast Blue,LFB)检测各组小鼠脊髓组织内髓鞘脱失情况,Western blot法检测脊髓组织内Shh、碎片蛋白-1(Patched-1,Ptc-1)蛋白表达,采用RT-PCR检测脊髓组织内平滑蛋白(Smoothened,Smo)mRNA、神经胶质瘤相关癌基因1(Glioma-associated oncogene-1,Gli1)mRNA表达。结果自CDPS治疗第9天开始,CDPS治疗组小鼠临床症状评分低于EAE模型组(P<0.05),而CDPS+cyc治疗组临床症状评分高于CDPS组(P <0.05)。CDPS治疗组小鼠脊髓LFB评分较EAE模型组降低(t=9.64,P<0.01),而CDPS+cyc治疗组其LFB评分与EAE模型组比较差异无统计学意义(P>0.05)。EAE模型组小鼠脊髓组织内Shh、Ptc-1蛋白以及Smo mRNA、Gli1mRNA表达水平较正常组升高(均P<0.01),经CDPS治疗后,上述因子表达进一步升高(均P<0.01),而经cyc干预后,上述因子表达较CDPS治疗组降低(均P<0.01)。结论 CDPS对EAE小鼠临床症状有改善作用,其作用途径可能与Shh信号通路有关。     

马索罗酚对实验性自身免疫性脑脊髓炎小鼠Th1/Th2细胞炎症因子平衡的影响

目的探讨马索罗酚对实验性自身免疫性脑脊髓炎(EAE)小鼠白细胞介素-4(IL-4)、IL-12、干扰素-γ(IFN-γ)表达的调节作用。方法将8~10周雌性C57BL/6小鼠54只随机分成对照组、模型组、治疗组。每组再随机均分为发病后10d及20d亚组,每亚组9只。采用皮下注射髓鞘少突胶质细胞糖蛋白35-55(MOG35-55)多肽0.1mL诱导EAE模型。自发病当天起,治疗组小鼠给予马索罗酚10mg/(kg·d)治疗,模型组及对照组给予等量5%二甲基亚砜(DMSO)10mL/(kg·d)处理。比较3组小鼠临床症状评分。应用实时定量PCR检测小鼠脊髓和脾组织中IL-4、IL-12、IFN-γmRNA表达水平。应用ELISA检测脑组织中IL-4、IL-12、IFN-γ蛋白表达水平。结果与模型组比较,治疗组小鼠临床症状较减轻(P0.05)。与模型组相比,治疗组小鼠10d时脊髓和脾组织IL-12、IFN-γmRNA表达水平降低(P0.05),IL-4mRNA水平增高(P0.05),脑组织IL-12、IFN-γ蛋白水平降低(P0.05),IL-4蛋白水平增高(P0.05);与模型组相比,治疗组20d时脊髓组织IL-12、IFN-γmRNA表达水平降低(P0.05),脑组织IFN-γ含量降低(P0.05)。结论马索罗酚可能通过降低脑、脊髓及脾组织中IL-12、IFN-γ表达,增加IL-4表达,调节Th1/Th2细胞炎症因子平衡,进而改善EAE小鼠疾病严重程度。