学习网站免费,品牌建设理论包括哪些内容,潍坊网站建设推广公司,做网站是做广告吗胶原诱导性关节炎小鼠(CIA)作为人类类风湿关节炎模型应用广泛,但CIA引起的关节炎起病比较缓慢#xff0c;造模周期较长#xff0c;一般为6-8周(1-12)。Chondrex公司已开发出单一种单克隆抗体合剂诱导的小鼠关节炎模型#xff08;CAIA#xff09;#xff0c;明显缩短了造模…胶原诱导性关节炎小鼠(CIA)作为人类类风湿关节炎模型应用广泛,但CIA引起的关节炎起病比较缓慢造模周期较长一般为6-8周(1-12)。Chondrex公司已开发出单一种单克隆抗体合剂诱导的小鼠关节炎模型CAIA明显缩短了造模周期。与CIA相比CAIA模型具有以下优点: (1)可在大多数小鼠上诱发关节炎包括CIA不敏感的小鼠(2)CAIA造模周期短加速筛选和评估类风湿性关节炎治疗药物3应用于转基因小鼠来研究基因对关节炎发病的影响4用于研究与人类类风湿性关节炎相关的各种炎症介质和因素在疾病中的作用例如细菌和病毒毒素13-17。 CAIA without LPS
胶原抗体诱导的关节炎不加LPS CIA是由于自身抗体形成的免疫复合物通过激活补体而诱发关节炎症因此研究表明多克隆胶原蛋白抗体(8-19) 或单克隆胶原蛋白抗体合剂能诱发关节炎(20-21)。根据MHC类型这些自身反应性抗体可以识别位于小鼠II型胶原蛋白的CB11或者CB8片段中的特定抗原定簇关节炎抗原表位22-23。 Chondrex公司生产的能诱发小鼠关节炎的抗体合剂含有 A2-10 (IgG2a), F10-21 (IgG2a), D8-6 (IgG2a), D1-2G(IgG2b), and D2-112 (IgG2b). 其中两个单克隆抗体F10-21和D8-6识别在LysC-2(291-374)的83个氨基酸肽段该肽段有LysC内切酶作用产生。 另外三个单克隆抗体A2-10,D1-2G和D2-112 能够识别二型胶原蛋白CB11片段124-402中LysC-1(124-290)的167各氨基酸肽段13。这些抗原表位氨基酸序列在各种物种中具有高度保守性包括鸡小鼠大鼠牛猪猴子和人 20-21。
如需获取完整资料请联系Chondrex代理商欣博盛生物获取~ CAIA with LPS
胶原抗体诱导的关节炎加LPS 研究表明联合注射低于致炎剂量的单克隆抗体合剂和大肠杆菌多脂LPS可诱发严重的小鼠关节炎13。通过胃肠道吸收的细菌毒素如LPS与低致炎水平的二型胶原自身抗体对引发关节炎有发协同作用24。这种模型相比于传统CIA 模型有多重优势。第一起病时间短发病率高达100%。第二可在大多数小鼠上诱导关节炎包括CIA不敏感的小鼠T细胞缺陷的小鼠特定基因敲除变异的小鼠详情请见表二. 图一显示CIA模型和CAIA模型特点的比较。CAIA造模周期是CIA建模周期的十分之一。 图一 CAIA vs. CIA: (a)三角形100%的小鼠在LPS注射后24-48小时即可见关节炎发作在第5-7天病情达到高峰。b圆形CIA诱发小鼠关节炎模型一般需要4周起病即使使用CIA易感品系如DBA/1J和B10.RIII小鼠。 表二 关节炎炎症程度的临床评分
得分发病情况0Normal 正常1Mild, but definite redness and swelling of the ankle or wrist, or apparent redness and swelling limited to individual digits, regardless of the number of affected digits 轻度的、踝关节、腕关节发红、肿胀2Moderate redness and swelling of ankle or wrist 踝关节或腕关节中度发红肿胀3Severe redness and swelling of the entire paw including digits 爪子严重发红、肿胀包括指端4Maximally inflamed limb involving multiple joints 四肢最大程度发炎包括多关节
如需获取完整资料请联系Chondrex代理商欣博盛生物获取~ 引用文献
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