关于同种异体抗角蛋白自身抗体对家兔接触性皮炎模型IL┐6,IL┐8的影响

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     作者:夏汝山 刘玉峰 李承新 党育平 万业宏 卢涛

【关键词】 抗角蛋白自身抗体
  关键词: 抗角蛋白自身抗体;接触性皮炎;白细胞介素6;白细胞介素8
  
  摘 要:目的 研究同种异体抗角蛋白自身抗体(AK auto Abs)对家兔接触性皮炎模型血清IL-6,IL-8的影响. 方法 24只家兔随机分为AK auto Abs组和对照组,每组12只;AK auto Abs组im药物,剂量为5mg・kg-1 ,1次・2d-1 ,30d;对照组动物以同样方法每次注射2mL生理盐水.ELISA检测血清IL-6,IL-8水平变化. 结果 AK auto Abs组动物血清IL-6,IL-8的水平下降;对照组动物血清IL-6,IL-8的水平升高. 结论 接触性皮炎可诱导IL-6,IL-8的产生;AK au-to Abs则抑制IL-6,IL-8的产生.
  
  Keywords:antikeratin autoantibodies(AK auto Abs);con-tact dermatitis;interleukin6;interlerkin8
  
  Abstract:AIM To study the influence of homologuous an-tikeratin autoantibodies(AK auto Abs)on serum IL-6and IL-8in rabbit model of contact dermatitis.METHODS 24rabbits were randomly pided into two groups,12rabbits in each group.Animals in AK auto Abs group were intramuscu-larly injected with AK auto Abs(5mg・kg-1 )every two days for30days,and those in control group were adminis-trated2mL9g・L-1 NaCl in the same way.Modifications of serum IL-6and IL-8levels were measured with ELISA.RESULTS Serum IL-6and IL-8of AK auto Abs group rose,while those of control group established with9g・L-1 NaCl fell.CONCLUSION Contact dermatitis can induce generation of IL-6and IL-8,while AK autoAbs inhibit the generation of IL-6and IL-8.
  
  0 引言
  
  天然抗角蛋白自身抗体(AK auto Abs)是天然自身抗体家族的一员,广泛存在于人及多种动物体内,在机体及皮肤的生理和病理过程中具有重要作用.刘玉峰等[1] 发现,不同血清AK auto Abs滴度的动物在发生接触性过敏性皮炎时,其炎症反应强度、组织损伤及修复过程有明显的差异.最近研究表明,短期应用AK auto Abs对家兔银屑病样皮炎和接触性皮炎模型具有明显治疗作用[2] .为了进一步明确大量应用AK auto Abs对机体细胞免疫功能的影响,探索AK auto Abs临床应用的可能及作用机制,我们对照观察了兔源AK auto Abs对家兔血清内细胞因子IL-6,IL-8的影响.
  
  1 材料和方法
  
  1.1 材料 雄性1a龄新西兰白兔体质量1.8~2.2kg由本校实验动物中心(医动字第08-015号)提供;兔角蛋白亲和层析柱参照本室制备人角蛋白亲和层析柱方法制备[3] ;兔AK auto Abs为本室制备[4,5] ;IL-6,IL-8试剂盒由本校基础部免疫学教研室提供.
  1.2 方法 ①采用亲和层析法从健康家兔混合血清中提取AK auto Abs,透析除盐后浓缩调整浓度至5g・L-1 ;临床注射用生理盐水1mL・kg-1 ;②24只新西兰白兔用饱和硫化钠(Na2 S)溶液涂于所有动物右侧背部一直径10cm区域,造成局部脱毛、皮肤红斑、肿胀及糜烂,诱发接触性刺激性皮炎[6] ;随机分为治疗组及对照组,每组12只;治疗组im AK auto Abs,剂量为5mg・kg-1 ;对照组im生理盐水2mL,1次・2d-1 ,30d;③im药物前从耳静脉采血,每2wk采血1次,离心后血清-20℃冻存,1mo后处死家兔;④夹心法ELISA[7] 检测IL-6,IL-8用0.05mol・L-1 pH9.6.Na2 CO3 -NaHCO3 缓冲液稀释包被抗体100倍加入96孔酶标板包被,100μL/孔,4℃过夜;0.5g・L-1 Tween20-PBS液洗涤3次,加30g・L-1 牛血清白蛋白200μL/孔,37℃孵育1h;振洗3次,加待测样品、阴性对照及倍比稀释的标准品,100μL/孔,37℃孵育1h;加酶标抗体:振洗3次,加稀释好的酶标抗体,100μL/孔,37℃孵育1h.振洗3次,加新鲜配制的ABTS显色液,100μL/孔,室温显色15min.ELISA读数仪测410nm处A值,绘制标准曲线.
  2 结果
  
  2.1 AK auto Abs治疗后IL┐6水平的变化 在家兔接触性皮炎模型,AK auto Abs组动物治疗后1~5wk血清IL-6水平分别为:0.1403±0.0631,0.1726±0.0835,0.4763±0.2217,0.3067±0.1276,0.1910±0.0843;对照组动物血清IL-6水平升高,分别为:0.3858±0.2076,2.8087±0.5059,2.7297±0.8050,2.4691±0.7435,0.2379±0.0939;经统计学分析,两组动物在2,3和4wk差异显著(P&<0.01).
  2.2 AK auto Abs治疗后IL┐8水平的变化 在家兔接触性皮炎模型,AK auto Abs组动物血清IL-8的水平分别为:0.0639±0.0041,0.0662±0.0086,0.0681±0.0036,0.0678±0.0036,0.0641±0.0055;对照组动物分别为:0.0625±0.0034,0.0656±0.0021,0.1277±0.0081,0.1089±0.0074,0.0693±0.0036;经统计学分析两组动物3,4wk差异显著(P&<0.01).
  
  3 讨论
  
  AK auto Abs作为天然自身抗体的重要成员之一,自从Krough发现以来,已对其生物学特性、免疫作用及生理、病理意义等进行了深入的研究.Grubauer等认为IgM AK auto Abs在体内可以协助处理由死亡脱落的角质形成细胞产生的自身抗原,在防止免疫系统对角蛋白诱发的炎症反应中起积极作用.我们曾成功地制备了不同血清AK auto Abs滴度的动物模型,发现在炎症性皮肤病,正常滴度的AK auto Abs对组织起保护作用并有利于其修复,并发现AK auto Abs可以抑制炎症、抑制角质形成细胞增殖,参与炎症反应及修复过程[8] .但AK auto Abs在体内发挥作用的具体机制尚不明确.我们还发现体外培养的角质形成细胞被不同浓度的AK au-to Abs作用后,在IL-1β的作用下,IL-6,IL-8的产生 受抑制[9] .在过敏性接触性皮炎等炎症性皮肤病,皮损中有IL-8较高水平的表达[10,11] ,角质形成细胞内有IL-6mRNA水平、蛋白质水平的高表达[12] .IL-6,IL-8还积极参与各种生理及病理过程[13-15] .本实验结果表明,在接触性皮炎时,对照组动物血清IL-6,IL-8的水平升高,这与炎症细胞及角质形成细胞至少通过分泌IL-6,IL-8两种细胞因子来维持局部炎症有关.

  在接触性皮炎时,AK auto Abs组动物血清IL-6,IL-8的水平低下,推测AK auto Abs可能作为一种抑制因子,抑制至少包括IL-6,IL-8在内的细胞因子的产生.IL-6可刺激角质形成细胞的增殖,可直接参与各种炎症反应[16] ,IL-8激活和促进炎症反应中粒细胞的迁移,对T细胞有趋化作用.因此,AK au-to Abs至少抑制IL-6,IL-8的产生而达到减轻炎症的作用,但AK auto Abs抑制IL-6,IL-8分泌的机制还有待探讨.
  

参考文献


  
  [1]Liu YF,Liu YF,Ding HY,Zhang TS,Wang HY,Liao WJ,Zhang HL.Influence of antikeratin autoantibodies on allergic contact dermatitis [J].Zhongguo Pifu Xinbingxue Zazhi(J Chin Derm Venereol),1992;6(1):8-9.
  [2]Li W,Li B,Liu YF,Zhao XD,Li CX,Huang H.Influence of antikeratin autoantibodies on contact dermatitis of rabbit [J].Zhonghua Pifuke Zazhi(J Chin Dermatol),2000;33(5):356-357.
  [3]Li CX,Liu YF,Liu YF.Preparation of keratin affinity column [J].Di-si Junyi Daxue Xuebao(J Fourth Mil Med Univ),1994;15(3):231-232.
  [4]Li CX,Liu YF,Liu YF,Zhang TS.Extraction and identifica-tion of antikeratin autoantibodies from normal human serum [J].Zhonghua Pifuke Zazhi(J Chin Dermatol),1995;28(4):248-249.
  [5]Zhang TS,Li CX,Liu YF,Liu YF.Extraction and identifica-tion of antikeratin autoantibodies from scales of patients with psoriasis [J].Di-si Junyi Daxue Xuebao(J Fourth Mil Med U-niv),1994;15(2):151-152.
  [6]Liu YF,Liu YF,Ding HY.Observation of development of an-tikeratin autoantibodies in rabbit dermatitis [J].Zhonghua Pi-fuke Zazhi(J Chin Dermatol),1990;23(4):248-249.
  [7]Xu ZK.Practical technique of monoclonal antibody [M].Shanx-i:Science and Technique Press,1991:42-47.
  [8]Liu YF,Liu YF,Zhang TS.Establishment of animal model of serum antikeratin autoantibodies of different titers [J].Zhong-hua Pifuke Zazhi(J Chin Dermatol),1991;24(2):123-124.
  [9]Zhang YG,Liu YF,Liu YF.Influence of antikeratin autoanti-bodies on cell proliferation induced with IL-1β[J].Zhongguo Pifu Xinbingxue Zazhi(J Chin Derm Venereol),1996;10(4):201-202.
  [10]Gillitzer R,Berger R,Mielke V,Müller C,Wolff K,Stingl G.Upper keratinocytes of psoriatic skin lesions express high levels of NAP-1/IL-8mRNA in situ [J].J Invest Dermatol,1991;97(1):73-79.
  [11]Gillitzer R,Toksoy A,Voss A.Role of chemokines in human skin wound healing [J].Zentralbl Chir,2000;125(1):56-59.
  [12]Grossman RM,Krueger J,Yourish D,Granelli-Piperno A,Murphy DP,May LT,Kupper TS,Sehgal PB,Gottlieb AB.Interleukin6is expressed in high levels in psoriatic skin and stimulates proliferation of cultured human keratinocytes [J].Proc Natl Acad Sci USA,1989;86(16):6367-6371.
  [13]Li T,Liu WY,Zhu HS.Serum cytokines in patients with multi-ple organ failure following open-heart-surgery [J].Di-si Junyi Daxue Xuebao(J Fourth Mil Med Univ),2000;21(5):574-575.
  
  [14]Zhang X,Chi SM,Li X,Fei Z,Zhang WH,Du L.Expression and secretion of interleukin-8in pituitary adenoma cells [J].Di-si Junyi Daxue Xuebao(J Fourth Mil Med Univ),2000;21(9):1076-1078.
  [15]Chen JK,Zhu YL,Zhang WH,Zhao YF,Zhong YQ.Existence and distribution of IL-8R immunopositive cells in digestive tract of rats [J].Di-si Junyi Daxue Xuebao(J Fourth Mil Med Univ),2000;21(4):440-442.
  [16]Wang JP,Lian JQ,Wang AL,Zhu Y,Jia ZS,Xie YM.Detec-tion and significance of serum sIL-2R,TNF-α,IL-6and T lym-phocyte subsets in peripheral blood in patient with chronic hep-atitis B [J].Di-si Junyi Daxue Xuebao(J Fourth Mil Med Univ),2000;21(7):814-816.
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