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Oncotarget:抗β2微球蛋白单克隆抗体能改善硼替佐米的耐药性

2015-05-08 沐晴 译 MedSci原创

硼替佐米(BTZ)是目前用于治疗多发性骨髓瘤和套细胞淋巴瘤的一种蛋白酶抑制剂,因其存在许多副作用及耐药性,硼替佐米在临床的广泛应用受到限制。研究认为,细胞存活和死亡受到细胞凋亡和自噬活动的交叉调节,而且,自噬可以通过抑制半胱天冬酶的清除抑制细胞凋亡。近来研究发现,自噬在调节化疗药物耐量性中起很重要的作用,BTZ可以激活肿瘤细胞的自噬。BTZ诱导的细胞自噬对于BTZ耐药的乳腺癌细胞非常重要,提示抑制

硼替佐米(BTZ)是目前用于治疗多发性骨髓瘤和套细胞淋巴瘤的一种蛋白酶抑制剂,因其存在许多副作用及耐药性,硼替佐米在临床的广泛应用受到限制。研究认为,细胞存活和死亡受到细胞凋亡和自噬活动的交叉调节,而且,自噬可以通过抑制半胱天冬酶的清除抑制细胞凋亡。近来研究发现,自噬在调节化疗药物耐量性中起很重要的作用,BTZ可以激活肿瘤细胞的自噬。BTZ诱导的细胞自噬对于BTZ耐药的乳腺癌细胞非常重要,提示抑制肿瘤细胞的自噬或许能改善BTZ的耐药。



  先前广州医学院的Mingjun Zhang等研究表明,抗β2微球蛋白单克隆抗体(抗-β2M mAbs)可以显著地诱导多发性骨髓瘤(MM)细胞凋亡,表明抗-β2M  mAbs可能发展为一种新型治疗药物。近来,这个研究团队,又进一步评估了抗-β2M mAbs和硼替佐米(BTZ)联合治疗MM的效果。结果显示,抗-β2M mAbs可以显著的提高BTZ诱导的MM细胞的凋亡水平。抗-β2M mAbs和BTZ联合治疗,也可以诱导BTZ-耐药的MM细胞的凋亡,这种效应与MM细胞表面表达的β2微球蛋白(β2M)增多有关。BTZ可以上调自噬蛋白的表达,然而,联合抗β2微球蛋白单克隆抗体可以抑制细胞自噬。



研究者对自噬基因beclin 1启动子区进行序列分析,结果推定,从第615 到789 bp,有3个NF-κB结合位点。然而在MM细胞中,联合抗-β2M mAbs治疗时,BTZ可以增加NF-κB的转录活性,而且,联合治疗可以抑制NF-κB p65与beclin 1 启动子结合。此外,在小鼠MM模型中,抗-β2M mAbs和BTZ联合治疗可以抑制MM细胞的活性。因此,这篇研究为抗-β2M mAbs和BTZ联合治疗走向临床提供了证据支持,有助于克服BTZ的药物抵抗,从而提高MM病人的存活率。

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    2015-11-28 liubm568
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    2016-02-14 aids221
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    2016-03-11 闆锋旦
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    2015-05-25 xzw113
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    2015-05-08 huaxipanxing

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当免疫学家Michel Sadelain在2007年时首次对一种经过基因工程改良的抗癌性T细胞进行试验时,他努力寻找着愿意参与该试验的患者。他所提出的治疗方案是:从肿瘤患者体内分离一些T细胞,利用基因工程技术对其进行改良,使其具有肿瘤识别能力,随后再将T细胞注射回患者体内;小鼠研究已经表明这种治疗方法具有可行性。但是Sadelain并没有因为同事拒绝提供患者而迁怒于他们。他说:“

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