雌激素受体阳性乳腺癌的新治疗方法

2014-12-17 佚名 生物谷

在2014年圣安东尼奥乳腺癌研讨会上,Loyola研究者和合作者报告了对于雌激素受体阳性乳腺癌,一种新的治疗方法。新的方法是称为γ分泌酶抑制剂(GSI)的新一类药物,能特异性抑制Notch和关闭负责癌细胞生长的关键基因。 现有的癌症药物有效地杀死成熟乳腺癌细胞,但有极少数未成熟的乳腺癌干细胞能抵抗此类药物。它们负责肿瘤的生长和发展,耐标准疗法是雌激素受体阳性乳腺癌死亡的主要病因。大约75%的

在2014年圣安东尼奥乳腺癌研讨会上,Loyola研究者和合作者报告了对于雌激素受体阳性乳腺癌,一种新的治疗方法。新的方法是称为γ分泌酶抑制剂(GSI)的新一类药物,能特异性抑制Notch和关闭负责癌细胞生长的关键基因。

现有的癌症药物有效地杀死成熟乳腺癌细胞,但有极少数未成熟的乳腺癌干细胞能抵抗此类药物。它们负责肿瘤的生长和发展,耐标准疗法是雌激素受体阳性乳腺癌死亡的主要病因。大约75%的乳腺癌是雌激素受体阳性。对于耐标准疗法的雌激素受体阳性乳腺癌,我们急需开发新的治疗方法。

新研究表明,这一新的实验类药物能克服耐药性,可能优化现有的内分泌疗法如他莫昔芬和芳香化酶抑制剂的潜在作用。 Notch蛋白促进肿瘤的生长和存活,该蛋白质存在于癌症干细胞的表面上,Notch蛋白能激活驱动肿瘤生长,扩散和存活的癌症干细胞的各种基因。

该研究包括20名早期阶段的雌激素受体阳性乳腺癌患者。在手术前,患者服用两种常用药物(他莫昔芬或来曲唑)中的一个,为期14天,以阻断雌激素刺激乳腺癌细胞的效应。14天后接受了活检,之后给予GSI药物(MK-0752)。

患者在25天,接受了最终乳腺癌手术。研究人员发现给予GSI后,由Notch调节的18个基因被显著逆转,尽管它是一个非常短的给药期。他们还确定了一个称为DAXX基因对于癌症干细胞的存活是至关重要的,该基因也被GSI关闭。确定这些基因可以帮助我们预测哪些患者会对抗Notch的GSI治疗有良好响应。在这项研究中,GSI的副作用最小。1例患者眼睛浮肿和咳嗽,4例经历面部痤疮。没有患者出现腹泻或手术并发症。

研究人员正计划一个更大的II期临床试验,以评估GSI类药物加内分泌治疗组合与单纯内分泌治疗比较。这项研究也将决定18基因“签名”如何能预测哪些患者响应治疗。

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    2014-12-17 cbp

    这一新的实验类药物能克服耐药性,可能优化现有的内分泌疗法如他莫昔芬和芳香化酶抑制剂的潜在作用

    0

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    2014-12-17 cbp

    评估GSI类药物加内分泌治疗组合与单纯内分泌治疗比较。这项研究也将决定18基因“签名”如何能预测哪些患者响应治疗

    0

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    2014-12-17 cbp

    新的方法是称为γ分泌酶抑制剂(GSI)的新一类药物,能特异性抑制Notch和关闭负责癌细胞生长的关键基因。

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