在db/db小鼠中,过量摄入果糖会加速功能障碍,并导致异常的质内皮细胞-介质细胞相互作用
Hiroaki Tsuruta1, Mako Yasuda-Yamahara1, Mamoru Yoshibayashi1
1Department of Medicine, Shiga University of Medical Science, Tsukinowa-cho, Otsu, Shiga, Japan.
Biochimica et biophysica acta. Molecular basis of disease
|February 14, 2024
概括
过度的果糖消费会通过增加肥胖和脏损伤,使糖尿病病 (DKD) 恶化. 这发生在质内皮细胞中的Lrg1升高,促进纤维化.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 代谢疾病 代谢疾病
- 分子生物学分子生物学
背景情况:
- 糖尿病病 (DKD) 治疗需要确定残留风险因素.
- 肥胖和饮食因素,特别是碳水化合物质量,影响DKD的进展.
- 过量摄入果糖是一个日益严重的饮食问题,可能与代谢并发症有关.
研究的目的:
- 在小鼠模型中研究过度果糖消费对DKD进展的影响.
- 阐明果糖诱导的损伤的潜在分子机制.
- 探索肥胖多样性和碳水化合物质量在DKD中的作用.
主要方法:
- 建立了一个新的糖尿病小鼠模型,使用db/db小鼠过度摄入果糖.
- 在果糖养和控制饮食组之间比较生理和脏参数.
- 利用整个脏的单细胞RNA测序 (scRNA-seq) 来识别细胞和分子变化.
主要成果:
- 与对照组相比,果糖养的db/db小鼠显示肥胖程度增加,但葡萄糖不耐受程度较轻.
- 在果糖模型中观察到血中cystatin C的升高和增强的质硬化症.
- 单细胞RNA测序揭示了质内皮细胞 (GEC) 中Lrg1的增加,通过TGF-β1信号传导驱动中纤维化.
结论:
- 过多的果糖摄入会加剧DKD的进展,而不依赖于葡萄糖不耐受症的严重程度.
- 在GEC中异常的Lrg1表达在调解果糖诱导的中纤维化中起着至关重要的作用.
- 针对Lrg1驱动的GEC-介质细胞交叉可能为DKD提供新的治疗策略.
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