果糖调节酸通路,并诱导Kupffer细胞中的炎症和分离表型
Mareca Lodge1, Grace Scheidemantle1, Victoria R Adams1
1Department of Molecular and Structural Biochemistry, NC State University, Raleigh, NC, USA.
Scientific reports
|February 18, 2024
概括
摄入高的果糖会损害肝脏的健康,降低库普弗细胞的活力,增加炎症. 这项研究揭示了果糖对巨细胞功能的影响,并促进纤维化基因表达,有助于非酒精性脂肪肝疾病 (NAFLD) 的进展.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 免疫学 免疫学 免疫学
- 代谢性疾病 代谢性疾病
背景情况:
- 过度摄入果糖与非酒精性脂肪性肝病 (NAFLD) 有关.
- 果糖会影响肝炎,纤维化和免疫细胞的激活.
- 有限的研究存在于果糖对肝脏巨细胞的直接影响.
研究的目的:
- 调查慢性果糖消费对巨细胞透,表型和肝脏功能的直接影响.
- 阐明果糖诱导的肝损伤和炎症背后的分子机制.
主要方法:
- 动物模型中的慢性果糖饮食.
- 肝脏组织的单细胞RNA测序 (scRNAseq).
- 使用巨细胞系进行体外研究 (IMKC,J774.1).
- C13 果糖追踪和代谢途径分析.
主要成果:
- 果糖饮食减少了库普弗细胞,但增加了过渡单细胞.
- 肝脏组织中纤维化 (Col1a1,Timp1) 和炎症 (Tnfa,Gpnmb) 基因的表达增加.
- scRNAseq在肝脏巨细胞中发现了Mmp12,Il1rn和Rsad2的升高.
- 在体外,果糖降低了巨细胞的活力,并增加了炎症/溶解基因表达.
- 酸路径 (PPP) 的抑制加剧了果糖诱导的基因上调.
结论:
- 果糖消费降低了肝脏巨细胞的活力.
- 果糖高调调节与Kupffer细胞中炎症解消和抗炎反应相关的基因.
- 这些发现凸显了果糖在NAFLD病变发生过程中的复杂作用,影响巨细胞功能,促进纤维化和炎症通路.
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