单细胞分析显示,IKKα调节了多克索鲁比诱导心肌病的巨细胞和T细胞之间的相互作用
Ganyi Chen1, Yiwei Yao1, Yunfei Jiang1
1Department of Thoracic and Cardiovascular Surgery, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing, 210006, Jiangsu, P.R. China.
Inflammation
|February 23, 2026
概括
多克索鲁比 (DOX) 化疗可能会损害心脏. 这项研究表明,抑制免疫细胞中的IKKα通过改变巨细胞和T细胞相互作用,使DOX诱导的心脏损伤恶化.
科学领域:
- 心血管生物学 心血管生物学
- 免疫学 免疫学 免疫学
- 分子医学是分子医学.
背景情况:
- 多克索鲁比 (DOX) 化疗对癌症治疗至关重要,但可能导致心脏毒性.
- 免疫细胞,特别是巨细胞和T细胞,与DOX诱导心肌病 (DICM) 有关,但分子机制尚不清楚.
- 在早期的DOX刺激期间,研究IKKα在免疫细胞中的作用对于理解DICM至关重要.
研究的目的:
- 调查IKKα在免疫细胞中在早期DOX管理期间调节心脏功能的作用.
- 在DOX诱导的心脏毒性的背景下阐明IKKα对巨分极和T细胞激活的影响的分子机制.
主要方法:
- 利用IKKαLyz2-Cre和IKKαflox/flox的小鼠模型来评估对DOX诱导的心脏损伤的易感性.
- 进行单细胞转录组分析以确定DOX治疗心脏中的细胞异质性和免疫细胞群.
- 分析了巨细胞极化 (M1/M2) 和T细胞激活标记物,以及巨细胞-T细胞相互作用.
主要成果:
- 免疫细胞中的IKKα缺失 (IKKαLyz2-Cre小鼠) 加剧了DOX诱导的心脏损伤,其特征是心脏功能减弱,纤维化和炎症.
- 单细胞分析揭示了不同的免疫细胞概况,在IKKα缺乏的小鼠中,单细胞/巨细胞增加和T细胞受损.
- 由于IKKα缺乏,巨细胞的两极分化转向M1,T细胞活化受损,并通过IFN-γ和IL-6信号改变了重要的巨细胞-T细胞交叉.
结论:
- 免疫细胞中的IKKα对多克索鲁比诱导的心脏毒性起着保护作用.
- IKKα的损失促进了促炎性M1巨细胞的两极分化,并破坏了T细胞的功能,导致心脏损伤.
- 准IKKα介导的免疫细胞相互作用是缓解多克索鲁比心脏毒性的潜在治疗策略.
相关概念视频
02:26NF-κB-dependent Signaling Pathway
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
01:20The JAK-STAT Signaling Pathway
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
01:16TGF - β Signaling Pathway
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...