在β细胞中MANF表达的升高通过减弱小岛应激和免疫性来保护小鼠免受链毒素诱导的糖尿病
Huini Li1, Tatiana Danilova1, Erik Palm1
1Institute of Biotechnology, HiLIFE, University of Helsinki, 00014 Helsinki, Finland.
Molecular therapy : the journal of the American Society of Gene Therapy
|February 28, 2026
概括
介脑星细胞衍生神经营养因子 (MANF) 通过减少β细胞应激和免疫攻击来预防1型糖尿病. 在贝塔细胞中过度表达MANF可以改善小鼠的葡萄糖控制和小岛健康.
科学领域:
- 内分泌学 在内分泌学.
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 1型糖尿病 (T1D) 涉及胰岛素生成β细胞的自身免疫破坏,由内质网膜 (ER) 应激和未折叠蛋白质反应 (UPR) 加剧.
- 中脑星细胞衍生神经变因子 (MANF) 对于β细胞的存活和增殖至关重要,具有ER压力调节,保护和免疫调节功能.
研究的目的:
- 评估用于T1D治疗的β细胞内源性MANF增加的治疗潜力.
- 在小鼠模型中研究MANF过度表达对糖尿病发展和β细胞功能的影响.
主要方法:
- 产生的β细胞特异性转基因小鼠过度表达MANF.
- 使用多次低剂量链毒素 (MLDS) 注射诱导糖尿病.
- 执行了小岛和胰腺淋巴结的转录基因分析和免疫类型.
主要成果:
- 升高的MANF保护免受MLDS诱导的高血糖症和保存的β细胞质量.
- 过度表达MANF增强了β细胞的增殖,减少了DNA损伤反应和免疫细胞的透.
- 转录组分析显示,MANF降低了与ER压力,氧化压力,炎症和免疫反应相关的基因.
- MANF抑制了关键的UPR标记物 (CHOP,TXNIP) 并减少了淋巴结中CD4+T细胞的存在.
结论:
- MANF作为T1D的双重治疗标,减轻β细胞的压力.
- MANF降低了β细胞的免疫性,为T1D管理提供了一个新的策略.
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