冠状瘤癌干细胞亚种群的特征化可以指导向免疫治疗方法,以减少疾病复发
Diana C Lopez1,2, Kellsye P Fabian3,4, Michelle R Padget3,4
1Sinonasal and Skull Base Tumor Program, Surgical Oncology Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States.
Frontiers in oncology
|May 14, 2024
概括
这项研究确定了冠状瘤中的癌症干细胞 (CSC),发现它们过度表达PD-L1和其他标记物. 准这些CSC可能会改善这种侵袭性癌症的治疗.
科学领域:
- 在瘤学瘤学.
- 癌症生物学 癌症生物学
- 免疫治疗是一种免疫疗法.
背景情况:
- 胆瘤是一种罕见的骨瘤,与治疗耐药性和复发有关.
- 癌症干细胞 (CSCs) 参与瘤的启动,维护和治疗抵抗.
- 鉴定和表征心脏瘤中CSC对于开发向疗法至关重要.
研究的目的:
- 为了识别和表征癌症干细胞 (CSCs) 在chordoma.
- 为了在体外和体内确定chordoma CSCs的表面标记表达特征.
- 调查向CSC用于胆瘤治疗的潜力.
主要方法:
- 流细胞测量用于分析六个瘤细胞系中的CSC表面标记物 (B7H6,HER2,MICA-B,ULBP1,EGFR,PD-L1).
- 多谱免疫光学 (mIF) 和HALO软件用于体内CSC鉴定,密度和空间分析18个切除的冠状瘤.
- 进行了标记物表达的定量分析 (阳性率百分比,平均光强度).
主要成果:
- 与非CSC相比,chordoma CSCs在体外表现出B7H6,MICA-B和ULBP1的表达更高.
- 在大多数细胞系和体内瘤样本 (75.18%) 中,PD-L1 在CSC上过度表达 (75.18%).
- 在体内,CSCs占冠状腺细胞的1.39%,并且倾向于聚集在侧膜附近.
结论:
- 这项研究提供了使用体外和体外方法首次识别和表型特征的chordoma CSCs.
- 过度表达PD-L1和其他潜在的免疫治疗标 (B7H6,MICA-B,ULBP1,EGFR,HER2) 在瘤中枢细胞上表明它们在治疗耐药性中的作用.
- 准这些CSC特异性标记物可能是一个有前途的策略,以对抗瘤复发.
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