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通过单细胞RNA测序来重建肝脏微环境和导致II型糖尿病的病理变化

Chia-Yen Dai^1,2, Ying-Ming Tsai^1,3, Chao-Yuan Chang⁴

¹School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.

International journal of biological sciences

|November 4, 2024

概括

2型糖尿病 (T2DM) 的并发症,如脂肪肝疾病 (MAFLD) 正在恶化. 我们的研究揭示了T2DM中的肝细胞变化如何促进MAFLD的进展和损伤,提供了新的治疗点.

科学领域:

内分泌学在内分泌学.
肝病学肝病学是一种肝病学.
细胞生物学细胞生物学

背景情况:

2型糖尿病 (T2DM) 是一个日益严重的全球健康问题.
代谢相关的脂肪肝疾病 (MAFLD) 是T2DM的常见并发症,但其在糖尿病疾病中的进展需要进一步阐明.
了解糖尿病MAFLD的细胞动态对于开发有效治疗方法至关重要.

研究的目的:

用单细胞RNA测序研究T2DM期间肝脏的细胞和分子变化.
确定关键的细胞类型和参与T2DM中MAFLD恶化的途径.
为糖尿病MAFLD提供潜在治疗策略的见解.

主要方法:

在两种T2DM小鼠模型的肝脏组织上利用单细胞RNA测序 (scRNA-seq).
分析了肝脏微环境中的基因表达特征和细胞-细胞相互作用.
进行了连接体-受体对分析,以确定细胞间通信通路.

主要成果:

激活的肝星细胞 (HSC) 通过调高转化生长因子β1诱导的转录1 (Tgfb1i1) 来促进MAFLD进展为脂肪肝炎.
肝细胞中高调的硫素相互作用蛋白 (Txnip) 损害了活性氧物种的清除,导致细胞损伤.
确定了肝脏侧鼻内皮细胞的毛细化和表达Cd36的激活库弗弗细胞 (KCs) 的新型子集.
在晚期疾病中,激活的HSC与肝细胞和KC通过Thbs2和Lamb2相互作用.
肝细胞之间的细胞间相互作用减少表明肝脏平衡受损.

结论:

肝星细胞激活和改变基因表达 (Tgfb1i1,Txnip,Fabp4,Cd36) 是T2DM中MAFLD的关键驱动因素.
特定的细胞-细胞相互作用,特别是涉及HSCs,肝细胞和KCs,在疾病进展中起着关键作用.
在T2DM相关的MAFLD中,肝脏平衡和细胞间通信的破坏需要有针对性的治疗干预措施.

关键词:

毛细化毛细化毛细化马夫尔德 (MAFLD) 是一个这就是T2DM.在Tgfb1i1i1的基础上.这是一个Txnipp.

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