成人皮肤单细胞分化的融合进化指导了朗格汉斯细胞的身份
Anna Appios1, James Davies1, Sofia Sirvent2
1Department of Haematology, UCL Cancer Institute, University College London, London WC1E 6DD, UK.
Science immunology
|September 6, 2024
概括
朗格汉斯细胞 (LCs) 具有作为巨细胞和树突细胞 (DCs) 的双重身份. 内在和外在因素决定了它们的功能,由单细胞衍生的LCs适应成人皮肤隙以进行修复.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 皮肤病学 皮肤病学
背景情况:
- 朗格汉斯细胞 (LCs) 是独特的细胞,具有双重作用:组织居民巨细胞和专业的抗原呈现细胞 (APCs),传统上与树突细胞 (DCs) 相关.
- 生命细胞的起源和分化途径,特别是胚胎和单细胞衍生种群之间的相互作用,仍然不完全理解.
研究的目的:
- 调查导致兰格汉斯细胞 (LC) 双重身份的内在和外在因素.
- 阐明单细胞衍生LC在成人皮肤利基中的分化和适应过程.
主要方法:
- 使用了与胚胎衍生的LCs的切除的小鼠模型来追踪单细胞衍生的替代物.
- 在不同发育阶段的小鼠和人类皮肤中分析了LC的转录形状.
- 研究了 Jagged-Notch 信号在表皮内的 LC 承诺中的作用.
主要成果:
- 在小鼠表皮层内,在LCs之间表现出内在的异质性,具有明显的单细胞起源.
- 识别了在毛囊中的Jagged-dependent Notch信号,这对初始LC承诺至关重要.
- 观察到人类新生儿LC保留了巨类的转录特征,这些特征在出生后被DC类模块所取代.
结论:
- 无论是内在的细胞特性还是外在的环境线索,例如皮肤,都决定了LC的身份和功能.
- 单细胞衍生LC适应成人的皮肤环境,有助于修复LC网络.
- 了解LC的可塑性是它们在皮肤免疫和修复中的作用的关键.
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