定义黑色素瘤组合疗法,在人类黑色素瘤细胞中提供老化敏感性
Daméhan Tchelougou1, Nicolas Malaquin1, Guillaume B Cardin1
1Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM) et Institut du Cancer de Montréal, Montreal, QC, Canada.
Frontiers in cell and developmental biology
|July 1, 2024
概括
使用老化剂向消除疗法诱导的衰老黑色素瘤细胞显示出对治疗耐药性的承诺. 然而,老化药物对通过向的BRAF/MEK抑制诱导的衰老样细胞无效.
科学领域:
- 在瘤学瘤学.
- 癌症生物学 癌症生物学
- 分子治疗学分子治疗学
背景情况:
- 抗免疫治疗的恶性黑色素瘤由于有限的持久反应而构成重大临床挑战.
- 传统和向疗法诱导各种癌细胞命运,包括衰老,这可能导致治疗耐药性.
- 衰老细胞,以稳定的细胞循环停止为特征,可以被老化药物准,提供一种潜在的治疗策略.
研究的目的:
- 为了研究治疗诱导的衰老黑色素瘤细胞的独特表型.
- 评估老化药物对不同类型黑色素瘤衰老的疗效.
- 探索老年治疗药物克服黑色素瘤治疗耐药性的潜力.
主要方法:
- 利用了一组具有多种突变背景的黑色素瘤细胞系.
- 诱导衰老和其他细胞命运使用基因毒性 (碳白-帕克利塔塞尔,辐射) 和向性 (BRAF/MEK抑制) 疗法.
- 评估老化表型,包括形态,DNA损伤和老化相关的分泌表型 (SASP).
- 采用基于实时成像的死亡试验来评估老化药物敏感性.
主要成果:
- 基因毒性疗法诱导了与SASP有关的DNA损伤相关的衰老.
- 向的BRAF/MEK抑制导致老化样细胞和持久细胞,缺乏DNA损伤和SASP.
- 老龄化药物 (Bcl2 / Bcl-XL 抑制剂,piperlongumine) 有效地消除了基因毒性疗法诱导的衰老细胞.
- 由BRAF/MEK抑制引起的老化样和持久细胞对老化剂没有反应.
- 在老化背景之外,观察到Bcl2/Bcl-XL抑制剂和BRAF/MEK抑制剂之间的直接协同作用.
结论:
- 黑色素瘤细胞表现出不同的衰老状态,这取决于诱导疗法.
- 情境依赖的老年疗法对于针对特定老年表型至关重要.
- 老化药对DNA损伤诱导的衰老是有效的,但不是针对性治疗的衰老样细胞.
- 需要进一步的研究来解决局限性问题,并优化黑色素瘤的老年治疗策略.
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