Blood:Mavorixafor治疗WHIM综合征的疗效和安全性

2020-09-06 MedSci原创 MedSci原创

疣、低丙球蛋白血症、感染和髓鞘性贫血综合征 (WHIM) 是一种罕见的原发性免疫缺陷,由CXCR4基因的功能获得突变引起。Mavorixafor是一种口服的CXCR4受体的选择性小分子拮抗剂。

中心点:

WHIM患者采用mavorixafor(400 mg,口服,1/日)可增加白细胞总数、中性粒细胞和淋巴细胞计数;

WHIM患者采用mavorixafor持续治疗6个月以上后的年化感染率降低,长的疣的数量也减少。

摘要:

疣、低丙球蛋白血症、感染和髓鞘性贫血综合征 (WHIM) 是一种罕见的原发性免疫缺陷,由CXCR4基因的功能获得突变引起。Mavorixafor是一种口服的CXCR4受体的选择性小分子拮抗剂,可增加骨髓来源的白细胞的动员和运输。
(CXCR4受体的功能获得性突变)

Dale等开展了一项开放标签的、剂量递增的、扩展的2期试验,以评估mavorixafor用于WHIM综合征的安全性、耐受性、药代动力学、药效学和初始活性。共招募了8位基因检测明确的WHIM综合征患者,接受mavorixafor治疗,剂量递增至400 mg(1/日)。5位患者进入扩展队列持续治疗28.6个月。
Mavorixafor的化学结构)

Mavorixafor耐受良好,无治疗相关重度不良反应。中位随访16.5个月时,研究人员观察到了绝对中性粒细胞计数(ANC)和绝对淋巴细胞计数(ALC)发生剂量依赖性的增加。用药剂量达到300 mg/日后,ANC可维持在500 个/μL以上,中位持续12.6个小时,而ALC可维持在1000 个/μL以上,长达16.9个小时。

对扩展队列进行的持续随访发现,采用有效剂量的患者,其年感染率从试验前12个月的4.63起事件下降到了2.27起。此外,观察到皮肤疣的数量平均减少了75%。
Mavorixafor治疗18个月后皮肤疣明显减少)

总而言之,该试验表明,mavorixafor( 400 mg,1/日)可动员WHIM综合征成年患者的中性粒细胞和淋巴细胞,长期治疗可为这类患者提供初步的临床疗效。

原始出处:

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    2020-09-06 内科新手

    谢谢梅斯提供这么好的信息,学到很多

    0

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