Department of Analytical Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
CAS Key Laboratory of Receptor Research, Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
Neurochem Res. 2021 Mar;46(3):686-698. doi: 10.1007/s11064-020-03202-z. Epub 2021 Jan 3.
28-O-caffeoyl betulin (B-CA) has been demonstrated to reduce the cerebral infarct volume caused by transient middle cerebral artery occlusion (MCAO) injury. B-CA is a novel derivative of naturally occurring caffeoyl triterpene with little information associated with its pharmacological target(s). To date no data is available regarding the effect of B-CA on brain metabolism. In the present study, a H-NMR-based metabolomics approach was applied to investigate the therapeutic effects of B-CA on brain metabolism following MCAO in rats. Global metabolic profiles of the cortex in acute period (9 h after focal ischemia onset) after MCAO were compared between the groups (sham; MCAO + vehicle; MCAO + B-CA). MCAO induced several changes in the ipsilateral cortex of ischemic rats, which consequently led to the neuronal damage featured with the downregulation of NAA, including energy metabolism dysfunctions, oxidative stress, and neurotransmitter metabolism. Treatment with B-CA showed statistically significant rescue effects on the ischemic cortex of MCAO rats. Specifically, treatment with B-CA ameliorated the energy metabolism dysfunctions (back-regulating the levels of succinate, lactate, BCAAs, and carnitine), oxidative stress (upregulating the level of glutathione), and neurotransmitter metabolism disturbances (back-regulating the levels of γ-aminobutyric acid and acetylcholine) associated with the progression of ischemic stroke. With the administration of B-CA, the levels of three phospholipid related metabolites (O-phosphocholine, O-phosphoethanolamine, sn-glycero-3-phosphocholine) and NAA improved significantly. Overall, our findings suggest that treatment with B-CA may provide neuroprotection by augmenting the metabolic changes observed in the cortex following MCAO in rats.
28-O-咖啡酰白桦脂醇(B-CA)已被证明可减少短暂性大脑中动脉闭塞(MCAO)损伤引起的脑梗死体积。B-CA 是一种新型的天然咖啡酰三萜衍生物,其与药理学靶标相关的信息很少。迄今为止,尚无关于 B-CA 对脑代谢影响的数据。在本研究中,应用基于 H-NMR 的代谢组学方法研究 B-CA 对 MCAO 大鼠大脑代谢的治疗作用。比较了 MCAO 后 9 小时(局灶性缺血发作后)急性期皮质的各组(假手术;MCAO+载体;MCAO+B-CA)的全局代谢谱。MCAO 诱导缺血大鼠对侧皮质发生多种变化,进而导致神经元损伤,下调 NAA,包括能量代谢功能障碍、氧化应激和神经递质代谢。B-CA 治疗对 MCAO 大鼠缺血皮质显示出统计学上显著的挽救作用。具体而言,B-CA 治疗改善了能量代谢功能障碍(反向调节琥珀酸、乳酸、支链氨基酸和肉碱的水平)、氧化应激(上调谷胱甘肽水平)和神经递质代谢紊乱(反向调节γ-氨基丁酸和乙酰胆碱的水平)与缺血性中风进展相关。用 B-CA 治疗后,三种与磷脂相关的代谢物(O-磷酸胆碱、O-磷酸乙醇胺、sn-甘油-3-磷酸胆碱)和 NAA 的水平显著改善。总的来说,我们的研究结果表明,B-CA 治疗可能通过增强 MCAO 后大鼠皮质观察到的代谢变化提供神经保护作用。