Oncotarget: 脂肪代谢抑制可以使前列腺癌细胞对抗雄激素阻断敏感

2017-05-14 AlexYang MedSci原创

前列腺癌(PCa)是西方男性最常见的恶性疾病并且是癌症相关死亡的第二主要原因。对于那些患有转移性激素抵抗性PCa(mCRPC)的病人,存活率是很低的,这也使得对mCRPC新的治疗方法的鉴定变得非常重要。最近,有研究人员发现,通过肉毒碱棕榈酰转移酶诱导的脂肪氧化(CPT1)缺陷可以引起生长和侵入性减弱,强化了脂肪氧化在PCa生长燃料的角色。研究人员利用免疫组化技术发现,与良性组织比较,CPT1A同工

前列腺癌(PCa)是西方男性最常见的恶性疾病并且是癌症相关死亡的第二主要原因。对于那些患有转移性激素抵抗性PCa(mCRPC)的病人,存活率是很低的,这也使得对mCRPC新的治疗方法的鉴定变得非常重要。

最近,有研究人员发现,通过肉毒碱棕榈酰转移酶诱导的脂肪氧化(CPT1)缺陷可以引起生长和侵入性减弱,强化了脂肪氧化在PCa生长燃料的角色。研究人员利用免疫组化技术发现,与良性组织比较,CPT1A同工型在PCa中是丰富的,尤其是在那些高等级的肿瘤中。由于脂肪氧化是由雄激素刺激的,因此,研究人员评估了CPT1A抑制和和抗雄激素疗法的协同效应。同样的,研究发现了CPT1A表达的减弱与AKT含量降低和激活相关,很可能是由细胞膜磷脂质的降低和INPP5K磷酸酶的激活驱使。这导致了雄激素受体(AR)作用的增加和对抗激素恩杂鲁胺的敏感性的增加。为了更好的理解这些发现的临床启示,研究人员评估了脂肪氧化抑制子(乙莫克舍、雷诺嗪、心舒宁)结合恩杂鲁胺在PCa细胞模型中的作用。研究发现,这些结合表现出了明显的生长抑制效应,包括了恩杂鲁胺在PCa细胞模型和一个更多神经内分泌的PCa模型-小鼠TRAMPC1细胞。最后,研究人员利用异种种植小鼠模型观察到了恩杂鲁胺和雷诺嗪结合的一种系统治疗可减少肿瘤的生长。总之,研究表明了改善的抗肿瘤活性可以通过CPT1A将AR通路和脂肪氧化作为共同治疗靶标来实现,这也许具有临床意义,尤其是在mCRPC治疗中。

原始出处:

Flaig TW, Salzmann-Sullivan M, Su LJ et al. Lipid catabolism inhibition sensitizes prostate cancer cells to antiandrogen blockade. Oncotarget. 21 April 2017.

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    2018-03-05 闆锋旦
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    2017-05-16 yxch36
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