贝塔细胞死亡和功能障碍导致器官捐献者的高血糖症
Iestyn M Shapey1,2, Angela Summers1,2, James O'Sullivan3
1Faculty of Medicine, Biology and Health, University of Manchester, Manchester, UK.
Diabetes, obesity & metabolism
|August 30, 2023
概括
胰腺捐赠者的高血糖症需要胰岛素治疗与β细胞死亡有关. 这一发现解释了为什么胰岛素治疗的捐赠者往往导致移植结果较差.
科学领域:
- 内分泌学 在内分泌学.
- 移植免疫学 移植免疫学
- 细胞生物学 细胞生物学
背景情况:
- 捐赠者高血糖症后脑死亡通常归因于胰岛素抵抗.
- 然而,来自小岛和胰腺移植的数据表明,替代机制可能更为重要.
研究的目的:
- 为了研究供体胰岛素使用与贝塔细胞死亡和功能标记物之间的关系,脑死亡的胰腺供体.
- 评估这些标记物如何与小岛隔离成功和移植后移植功能相关.
主要方法:
- 胰岛素治疗 (IT) 与非胰岛素治疗 (非IT) 的脑死亡胰腺捐赠者的临床和生化数据进行比较.
- 测量了血葡萄糖,C-,来自胰岛素基因促进体 (INS-cfDNA) 的无细胞DNA和microRNA-375 (miR-375) 作为β细胞死亡的指标.
- 评估了这些标记物对小岛移植结果的预测价值.
主要成果:
- 在92名胰腺捐献者中,43%需要胰岛素治疗.
- 与未接受胰岛素治疗的捐赠者相比,胰岛素治疗的捐赠者表现出较差的血糖控制和β细胞功能 (高峰葡萄糖,低C) .
- 接受胰岛素治疗的捐赠者具有显著更高的INS-cfDNA和miR-375水平,这表明β细胞死亡增加.
- 循环供体miR-375水平强烈预测了3个月后接受者的小岛移植失败.
结论:
- 胰腺捐赠者的高血糖症需要胰岛素治疗,与β细胞死亡密切相关.
- 这种β细胞死亡是解释胰岛素治疗供体移植后功能减弱的关键因素.
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