拉米纳林可降低高脂肪饮食 (HFD) 养小鼠的胆固醇摄入量和NPC1L1蛋白表达
Zhuoqian He1, Zhongyin Zhang2, Pengfei Xu1
1Department of Pharmacology, School of Pharmacy, Qingdao University Medical College, Qingdao 266073, China.
Marine drugs
|December 22, 2023
概括
拉米纳林是一种来自棕藻的化合物,通过降低NPC1L1蛋白水平,减少了肠道中的胆固醇吸收. 这有效地改善了血脂特征,并减少了高脂肪饮食的小鼠心血管疾病的风险因素.
科学领域:
- 生物化学 生物化学
- 药理学 药理学是指药理学的学科.
- 营养科学 营养科学
背景情况:
- 饮食中的高胆固醇摄入量有助于导致脂质不良和心血管疾病 (CVD).
- 拉米纳林是一种棕藻类的多糖,表现出低脂性活性,但其机制尚不清楚.
- 尼曼-皮克C1-like 1蛋白 (NPC1L1) 对于肠道胆固醇吸收至关重要.
研究的目的:
- 在实验室中研究拉米纳林对肠道胆固醇吸收的影响.
- 评估拉米纳林对高脂肪饮食 (HFD) 养小鼠的脂质谱和肠道形态的影响.
- 为了确定NPC1L1是否参与了拉米纳林的低脂性机制.
主要方法:
- 在体外:用拉米纳林和BODIPY-胆固醇处理的Caco-2细胞.
- 在体内:用HFD养的C57BL/6J小鼠接受了拉米纳林治疗;血清,肝脏和便脂质的分析,以及骨形态.
- 机制研究:NPC1L1表达分析和siRNA介导的淘汰.
主要成果:
- 拉米纳林抑制了Caco-2细胞中的胆固醇吸收,以度依赖 (EC50 = 20.69 μM).
- 在HFD小鼠中,拉米纳林降低了血清总胆固醇,甘油三和LDL-C,并降低了肝脂和胆酸.
- 拉米纳林降低了HFD小鼠的头小损伤,并降低了NPC1L1表达的调节.
结论:
- 拉米纳林有效地改善了HFD养小鼠的脂质不良症.
- 拉米纳林可能通过降低NPC1L1表达的调节来减少肠道胆固醇的吸收.
- 拉米纳林显示出作为治疗高脂血症和降低心血管疾病风险的治疗剂的潜力.
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