脂生和MASLD:重新思考SREBPs的作用
1Department of Gastroenterology and Hepatology, Mie University, 2-174 Edobashi, Tsu, Mie, 514-8507, Japan. nakagawah@med.mie-u.ac.jp.
Archives of toxicology
|May 6, 2025
概括
固醇调节元素结合蛋白 (SREBPs) 在代谢功能障碍相关的脂肪性肝病 (MASLD) 中具有双重作用. 精心准SREBPs对于治疗MASLD和预防肝癌至关重要.
科学领域:
- 肝病学和代谢疾病研究.
背景情况:
- 与代谢功能障碍相关的脂肪性肝病 (MASLD) 是一种普遍的疾病,也是肝细胞癌 (HCC) 的重要危险因素.
- 脂质代谢,特别是由固醇调节元素结合蛋白 (SREBPs) 调节的新型脂质生成 (DNL),是MASLD病原体的核心.
研究的目的:
- 调查SREBP在MASLD进展和HCC发展中的复杂,阶段性作用.
- 根据SREBP活性,重新评估针对MASLD的脂质代谢向治疗方法.
主要方法:
- 对小鼠MASLD模型的分析,以评估SREBP抑制对肝损伤和癌症发生的影响.
- 临床MASLD样本的转录组分析,以评估动态的SREBP活动转移.
- 研究将SREBP功能障碍与内分泌网膜 (ER) 应激和脂平衡联系在一起的机制.
主要成果:
- 在小鼠MASLD模型中,具有强烈的SREBP抑制的肝损伤和致癌的悖论性恶化.
- SREBP功能障碍破坏了脂稳态,损害了ER膜流动性,并诱导了ER压力.
- 临床数据显示,在早期的MASLD中,SREBP上调,在晚期的燃烧期下调,与纤维化和HCC风险相关.
结论:
- 在MASLD中,SREBP活动表现出双相作用,过度激活和严重功能障碍都有有害影响.
- 针对MASLD中脂质代谢的治疗策略需要仔细考虑疾病的阶段.
- 需要个性化的干预措施来缓解MASLD的进展,并通过调节SREBP活动来降低HCC风险.
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