在青少年隔离诱导糖尿病中,血清素/GLP-1 电路的参与
bioRxiv : the preprint server for biology
|July 3, 2023
概括
在小鼠中,青少年的社会隔离会诱导2型糖尿病,这种糖尿病的特征是高血糖和胰岛素反应受损. 这突出了隔离,代谢功能障碍和神经回路变化之间的潜在联系,为未来的研究提供了目标.
科学领域:
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
- 代谢综合征是代谢综合征的一种.
背景情况:
- 在COVID-19大流行期间的社会隔离与儿童和青少年肥胖率的增加有关.
- 肥胖经常与2型糖尿病并发症,但大流行病对年轻人这种并发症的影响尚未得到充分评估.
- 青春期是一个关键的发育时期,社会环境可以显著影响长期的健康结果.
研究的目的:
- 为了研究青少年社会隔离是否可以诱导小鼠2型糖尿病,反映人类肥胖引起的糖尿病.
- 探索连接社会隔离和代谢功能障碍的潜在神经机制.
- 在特定的神经回路内识别潜在的治疗点.
主要方法:
- 在整个青春期,雄性C57BL/6J小鼠被单独或分组安置.
- 评估了代谢参数,包括禁食葡萄糖,胰岛素耐受性测试和骨肌肉中的胰岛素信号.
- 测量了胰腺小岛的胰岛素含量.
- 使用Promethion代谢室监测行为变化,睡眠和呼吸交换比率.
- 神经基因转录在各种大脑区域进行了分析.
主要成果:
- 在小鼠中,青少年隔离诱导了2型糖尿病,由禁食高血糖和葡萄糖清除受损证明.
- 隔离的小鼠显示肌肉中的胰岛素信号减少,胰腺小岛上的胰岛素染色减少.
- 代谢表型学揭示了睡眠和饮食行为的失调以及呼吸交换比率的改变.
- 神经基因表达分析发现了血清素和GLP-1神经回路的显著变化,表明受体活性和表达的改变.
结论:
- 青少年时期的社会隔离足以在雄性小鼠中诱导2型糖尿病表型.
- 在色胺/GLP-1神经回路中发现的变化代表了社会隔离与糖尿病之间的潜在机制联系.
- 这种神经回路为进一步研究社会隔离与代谢疾病之间的关系以及探索药理干预提供了有希望的目标.
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