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-葡萄糖共传输体2抑制剂部分改善了大脑线粒体功能,但并没有减轻心肌梗塞的老鼠的认知障碍

Nattayaporn Apaijai¹, Tanawat Attachaipanich², Chayodom Maneechote³

¹Neurophysiology Unit, Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai 50200, Thailand; Cardiac Electrophysiology Unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand, 50200.

Biochimica et biophysica acta. Molecular basis of disease

|March 25, 2025

概括

-葡萄糖共载体2抑制剂 (SGLT2i) 没有改善心肌梗塞 (MI) 的老鼠的认知功能,尽管增强了大脑的谷氨酸和线粒体功能. 需要进一步的研究来理解SGLT2i.

科学领域:

心脏病学心脏病学
神经学神经学
药理学药理学是指药理学的学科.

背景情况:

-葡萄糖共载体2抑制剂 (SGLT2i) 在治疗心力衰竭 (HF) 中表现有前途,并可能减轻2型糖尿病患者的认知障碍.
在HF的背景下,SGLT2i影响认知功能的精确机制仍然不完全理解.

研究的目的:

研究SGLT2i在小鼠心肌梗塞 (MI) 模型中改善认知功能和突触可塑性的潜力.
确定SGLT2i介导的改善是否与减少大脑炎症,氧化应激,代谢功能障碍和线粒体损伤有关.

主要方法:

在雄性大鼠中诱导了心肌梗塞 (MI),并且在MI后的小鼠中减少了喷射分数,用载体,SGLT2i (Dapagliflozin) 或ACE抑制剂 (Enalapril) 治疗.
评估了心脏功能,认知表现,突触可塑性标志物 (状脊柱密度) 和大脑生化参数.
具体的评估包括评估炎症,氧化应激和脑组织中的线粒体功能.

主要成果:

肌肉干扰小鼠表现出心脏功能障碍,认知缺陷,突触可塑性受损,脑氧化应激增加,炎症和线粒体功能障碍.
SGLT2i和ACEi治疗改善了心脏功能,但没有逆转认知障碍或突触缺陷.
SGLT2i和ACEi恢复了大脑谷氨酸水平的降低,SGLT2i部分改善了线粒体功能.

结论:

在小鼠中,SGLT2i对大脑谷氨酸水平和线粒体功能有部分益处.
在这个模型中,这些神经保护作用不足以改善观察到的认知障碍和突触功能障碍.
需要进一步研究SGLT2i对心血管疾病中大脑健康的影响背后的复杂机制.

关键词:

认知功能认知功能线粒体中的线粒体.心肌梗塞的心脏病发作葡萄糖转运器2抑制剂突触性可塑性突触性可塑性

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