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AML通过Notch信号改变了骨髓 stromal 细胞的骨质承诺
Chiara Tomasoni1, Corinne Arsuffi1, Samantha Donsante1,2
1Tettamanti Center, Fondazione Istituto Ricovero e Cura a Carattere Scientifico (IRCCS) San Gerardo dei Tintori, Monza, Italy.
Frontiers in immunology
|December 19, 2023
概括
急性髓性白血病 (AML) 细胞通过Notch信号破坏骨髓 stromal 细胞 (BMSCs) 的骨质分化. 这通过促进骨质前细胞积累,创造了一个支持白血病的利基.
科学领域:
- 血液学 血液学 血液学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- 急性髓性白血病 (AML) 是一种异质癌症,其特征在于骨髓 (BM) 中未成熟的髓性爆裂积累.
- AML破坏正常的血液形成并改变BM微环境,创造了一个支持白血病发生的利基.
- 骨髓 stromal 细胞 (BMSCs) 对于 BM 利基形成至关重要,影响脂肪细胞和骨质细胞分化.
研究的目的:
- 研究AML细胞影响正常BMSCs的骨质分化机制.
- 确定直接细胞与细胞相互作用和特定信号通路在AML诱导的BM利基的变化中的作用.
主要方法:
- 利用2D共同培养系统研究AML细胞系和初级爆发对正常BMSCs的影响.
- 使用早期和晚期骨质生成标志物调查骨质生成承诺.
- 进行了机械学研究,以确定涉及的信号通路,包括Notch信号,并使用γ-分泌酶抑制剂来阻止Notch激活.
主要成果:
- AML细胞,但不是正常的造血细胞,在BMSC中诱导了无效的骨质生成承诺,标志着组织非特异性酸酶 (TNAP) 的增加,没有晚期基因上调.
- AML细胞和BMSC之间的直接相互作用对于改变骨质分化是必不可少的.
- 在BMSC中AML介导的Notch激活被确定为一个关键机制,有助于无效的骨质生成承诺,其抑制取消了TNAP上调.
结论:
- AML透促进了白血病支持的前骨质细胞丰富的利基在BM.
- 这种利基形成部分归因于AML诱导的BMSCs中Notch信号的激活.
- 准划分信号可能提供一种治疗策略,以破坏AML支持的BM微环境.
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