Blood:地西他滨可增强CD34+祖细胞分化的NK细胞抗白血病的活性。

2017-11-15 MedSci MedSci原创

NK细胞移植与低甲基化药物(HMA)联合,是治疗急性髓系白血病(AML)的一种具有吸引力的治疗方式。然而,目前关于HMA对NK细胞功能的影响的数据基本是来源于高于临床药物剂量的体外实验。

中心点:

CD34+的祖细胞所衍生的NK细胞与低甲基化药物联合可抗AML细胞。

在体内,地西他滨介导CD34衍生的NK细胞的表型、功能的调控,从而增强抗白血病的疗效。

摘要:

NK细胞移植与去甲基化药物(HMA)联合,是治疗急性髓系白血病(AML)的一种具有吸引力的治疗方式。然而,目前关于HMA对NK细胞功能的影响的数据基本是来源于高于临床药物剂量的体外实验。

Jeannette Cany等研究人员在AML模型中进行阿扎胞苷与地西他滨分别联合同种异体NK细胞(来源于CD34+的造血干细胞和祖细胞,HSPC-NK细胞)移植的治疗效果的比较性研究。

在体外,低剂量的HMA不影响HSPC-NK细胞的活性。低剂量的地西他滨可增强HSPC-NK细胞的杀伤、增殖以及产生IFN-γ的能力,阿扎胞苷则降低HSPC-NK细胞的增殖和活性。

重要地是,研究人员发现HMA与HSPC-NK细胞可协同靶向AML细胞系和患者的AML原始细胞。在NOD/SCID/IL2Rgnull小鼠体内,两种药物均表现为显着延缓AML的病程进展,且不影响HSPC-NK细胞移植后的持续时间。输注的NK细胞持续表达大部分激活受体,上调NKp44的表达。

但仅地西他滨可加强HSPC-NK细胞在体内的抗白血病的活性。除了上调AML细胞上的NKG2D和DNAM-1激活配体,地西他滨还通过HSPC-NK细胞增强炎症因子、穿孔蛋白和TRAIL的mRNA的表达。

此外,地西他滨治疗可使骨髓腔中HSPC-NK细胞的数量增加,提示地西他滨可增强NK细胞的活性、游走和肿瘤的靶向性。

上述数据为研究HSPC-NK细胞和地西他滨治疗AML患者的联合方案提供了基本原理。

原始出处:

Jeannette Cany,et al.Decitabine enhances targeting of AML cells by CD34+ progenitor-derived NK cells in NOD/SCID/IL2Rgnull mice.Blood  2017  :blood-2017-06-790204;  doi: https://doi.org/10.1182/blood-2017-06-790204

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    2018-04-29 gaoxiaoe
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    2017-11-18 大爰

    学习了谢谢分享!!

    0

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    2017-11-17 jennyli5986

    学习了

    0

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近日,来自美国梅奥诊所的研究者通过研究揭示了一种强有力的治疗两种致命性癌症-三阴性乳腺癌和肾透明细胞癌(常见的肾癌)的方法。相关研究成果刊登在了国际杂志Molecular Cancer Therapeutics上,文章中,研究者报道了两种药物,罗咪酯肽和地西他滨,两种药物可以协作来激活肿瘤抑制基因抑制肿瘤发生。用药后,肿瘤抑制基因会分泌卷曲相关蛋白sFRP1,随后肿瘤细胞便会停止生长,并且死亡。