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JAMA Neurol:阿仑单抗临床试验中的淋巴细胞重建现象

2017-06-13 zhangfan MedSci原创

尽管阻断记忆T和B细胞可能限制多发性硬化病情,但T细胞调控缺乏条件下CD19 B细胞亚群的快速增殖会影响阿仑单抗的有效性和安全性,控制B细胞增殖直至T细胞调控恢复可能是控制二次自身免疫的有效方法

CD52单克隆抗体阿仑单抗能有效地抑制复发性多发性硬化症(MS)但由于二次B细胞自身免疫事件发生率高导致应用受限。如何避免B细胞过度增殖是提高药物应用效果的关键。近日研究人员就阿仑单抗对淋巴细胞亚群的影响开展研究,探讨其治疗MS继发性自身免疫的有效性和风险机制。

研究数据来自阿仑单抗与干扰素疗效比较的多发性硬化症I和II临床研究(CARE-MS I、II)。时间从2016年6月至10月。研究的主要终点是T和B淋巴细胞亚群分析及抗药物抗体反应。

研究发现阿仑单抗可消耗95%以上的CD4 T细胞,包括80%左右的调节细胞和CD8 T细胞。在试验早期阿仑单抗可减少85%以上的CD19+ B细胞,但调节T细胞的缺失,导致未成熟的B细胞过量再生并转化为成熟B细胞,使得B细胞数量增长180%,该过程还持续消耗CD19+记忆B细胞。这种细胞动力学的快速变化与阿仑单抗结合中和抗体和B细胞自身免疫相关。

研究认为,尽管阻断记忆T和B细胞可能限制多发性硬化病情,但T细胞调控缺乏条件下CD19 B细胞亚群的快速增殖会影响阿仑单抗的有效性和安全性,控制B细胞增殖直至T细胞调控恢复可能是控制二次自身免疫的有效方法。

原始出处:

David Baker et al. Interpreting Lymphocyte Reconstitution Data From the Pivotal Phase 3 Trials of Alemtuzumab. JAMA Neurol. June 12 2017.

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    2018-03-12 yinhl1978
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    2017-06-13 中医痴

    不错的,学习了,谢谢分享!

    0

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    2017-06-13 有备才能无患

    尽管阻断记忆T和B细胞可能限制多发性硬化病情,但T细胞调控缺乏条件下CD19B细胞亚群的快速增殖会影响阿仑单抗的有效性和安全性,控制B细胞增殖直至T细胞调控恢复可能是控制二次自身免疫的有效方法。

    0

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JAMA Neurol:多发性硬化的视网膜结构、鞘内免疫与临床病程的关系

视网膜层可以反映多发性硬化病情的进展。GCIPL减少与鞘内B免疫细胞增加相关,是残疾恶化的独立危险因素,而INL水平与脑实质性活动有关。因此,视网膜光学相干断层扫描可能是一种对不同MS患者进行鉴别开展个体化治疗方案的手段

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