Blood:sutimlimab疗法改善了冷凝集素病的严重溶血性贫血状况

2021-06-13 Viho MedSci原创

冷凝素病是一种难以治疗的自身免疫性溶血性贫血,高浓度的循环免疫球蛋白M自身抗体(冷凝集素)与红细胞上的“I”抗原结合所致,主要导致血管外溶血。

冷凝素病是一种难以治疗的自身免疫性溶血性贫血,高浓度的循环免疫球蛋白M自身抗体(冷凝集素)与红细胞上的“I”抗原结合所致,主要导致血管外溶血。,这种疾病是溶血性贫血的一种类型,当骨髓不能像红细胞被破坏那样快速产生红细胞时,就会出现这种情况。

冷凝集素诱导补体介导的调理所致血管外溶血

Blood杂志报道的一项首次人体临床试验中,研究性药物sutimlimab似乎对治疗冷凝集素病很有效,这是一种罕见的慢性血液疾病,目前还没有获准的治疗方法。

在这项研究中,sutimlimab是一种特异性的C1s抑制剂,它迅速阻止了红细胞的破坏,提高了血红蛋白水平,消除了患者的输血需求,并且没有造成严重的不良反应。

高级作者、维也纳医科大学的Bernd Jilma医生说:"该药物的耐受性很好,产生了有临床意义的血红蛋白水平的提高,并排除了输血的需要,甚至在之前多种治疗方法都失败的病人身上也是如此。迄今为止,还没有美国食品和药物管理局(FDA)批准的冷凝集素病的治疗方法。

这项研究包括10名56-76岁的患者。患者患冷凝集素病的时间中位数为5年,许多人之前接受过多次治疗,但都不成功。入院时,所有患者的血红蛋白水平都低于正常水平,血红蛋白是红细胞的一种成分,负责将氧气输送到全身细胞和器官。六名患者正在接受定期输血以控制其症状。

在这些有反应的患者中,在用全剂量的苏肽单抗治疗的第一周内,红细胞的破坏停止了,患者的血红蛋白水平明显提高。七名患者有反应,在六周内血红蛋白水平比基线7.5克/分升(g/dL)增加了4克/分升。四名患者的血红蛋白水平恢复到正常。

sutimlimab迅速使胆红素水平正常化,血红蛋白水平升高。

当sutimlimab治疗停止,药物离开病人的血液后,血红蛋白水平下降,红血球的破坏再次开始。然而,当恢复治疗时,这些影响再次被逆转。这六名通过定期输血维持生命的患者在接受苏肽单抗治疗时,在长达18个月的时间里一直没有输血。

冷凝素介导的补体攻击患者血液循环中的供体红细胞,临床益处可能是短暂的。但是该研究中sutimlimab有很好的耐受性和诱导有临床意义的血红蛋白水平的增加,即使是在多个先前的治疗期的病人,排除了输血的需要。

研究结果安全且积极,根据这些数据,sutimlimab被美国食品和药物管理局授予治疗这种疾病的突破性疗法。该药物显然解决了未得到满足的医疗需求,研究中已经看到在先前多种治疗方法失败的患者中出现了快速、强烈的有效反应。

文章参考:Ulrich Jäger, Shirley D'Sa, Christian Schörgenhofer, Johann Bartko, Ulla Derhaschnig, Christian Sillaber, Petra Jilma-Stohlawetz, Michael Fillitz, Thomas Schenk, Gary Patou, Sandip Panicker, Graham C. Parry, James C. Gilbert, Bernd Jilma. Inhibition of complement C1s improves severe hemolytic anemia in cold agglutinin disease: a first-in-human trialBlood, 2018; blood-2018-06-856930 DOI: 10.1182/blood-2018-06-856930

 

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    2022-01-14 6888

    学习了

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    2021-10-25 爆笑小医
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