Leukemia:艾曲波帕eltrombopag在骨髓增生异常综合征的PDX模型中的临床前评估

2021-07-01 xiaozeng MedSci原创

骨髓增生异常综合征(MDS)是一种克隆性造血干细胞疾病,其特征是骨髓(BM)发育不良、血细胞的减少、复发性基因组畸变以及疾病发展为急性髓系白血病的易感性。

骨髓增生异常综合征(MDS)是一种克隆性造血干细胞疾病,其特征是骨髓(BM)发育不良、血细胞的减少、复发性基因组畸变以及疾病发展为急性髓系白血病的易感性。

尽管目前对于MDS的分子表征的研究已取得了较大的进展,但由于缺乏解决功能问题的临床前模型,也导致较难将发现的突变数据转化为新的治疗策略。


为了克服上述的限制,研究人员在先前的研究中已经在NSG小鼠中建立了患者来源的异种移植 (PDX) 模型。在该研究中,研究人员旨在证实先前建立的MDS PDX模型可用于解决相应的临床问题。

在该研究中,研究人员主要分析了促血小板生成素受体激动剂eltrombopag(艾曲波帕)的有效性和安全性。该临床前研究共包括了从9个MDS患者样本中生成的49个异种移植物。


研究人员通过基于FACS(流式细胞术)的人血小板定量来验证药物的功效,并通过PDX样本的全外显子组测序重建了骨髓克隆演变。相比于临床试验,该实验允许在患者的个体水平上进行载体和复制控制分析,以破译疾病发生发展中的个体特异性影响。研究人员发现艾曲波帕能够有效的刺激MDS PDX模型中的血小板生成,且不会对患者的克隆组成产生不利影响。

使用MDS患者来源的异种移植模型进行临床前评估

总而言之,该研究结果揭示,MDS PDX模型可作为MDS临床前试验中测试新治疗概念的一个潜在的工具。


原始出处:

Schmitt, N., Jann, JC., Altrock, E. et al. Preclinical evaluation of eltrombopag in a PDX model of myelodysplastic syndromes. Leukemia (25 June 2021).

 

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    2021-07-04 微探

    这个翻译的不错,学习了

    0

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    2021-07-02 yangchou

    好文章,共享之。

    0

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    2021-07-02 CHANGE

    梅斯里提供了很多疾病的模型计算公式,赞一个!

    0

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Blood:艾曲波帕(EPAG)与难治性重度再生障碍性贫血(rSAA)

基于43位患者治疗12周(50-150mg)的效果,艾曲波帕(EPAG)获得FDA批准用于治疗难治性重度再生障碍性贫血(rSAA)。反应动力学表明延长EPAG(150mg)的给药时间可加速反应速度,提高缓解率。研究人员招募了40位rSAA患者,EPAG 150mg/日,主要评估指标是24周时的缓解率。24周时,有20位(50%)患者获得缓解,其中5位(25%)在12周时被认为是无反应者。15/19

Blood:艾曲波帕(eltrombopag)可在IFNγ介导的炎性环境中维持人造血干/祖细胞的存活和功能

中心点:在人类HSPCs中,IFNγ过剩会扰乱TPO诱导的信号通路;艾曲波帕(eltrombopag)可通过克服这种抑制从而增强HSPC功能。通过TPO:IFNγ异构体封闭TPO上的与c-MPL结合的低亲和力结合位点,有助于干扰TPO信号。摘要:在免疫介导的骨髓衰竭综合征(BMF)中,促炎细胞因子干扰素-γ(IFNγ)参与人类造血干细胞和祖细胞(HSPC)的耗竭。Luigi J. Alvarado