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素减少高血糖引起的恐惧记忆在小鼠中的促进
Kayla R Gilley-Connor1,2, Laura E Kusumo1, Grace M Hall1,3
1Department of Psychology and Neuroscience, Baylor University, Waco, Texas, USA.
Brain and behavior
|March 9, 2026
概括
慢性高血糖在小鼠,糖尿病的一个模型,增强恐惧记忆. 抗抑郁药fluoxetine逆转了这种效应,这表明基底侧杏仁体对高血糖引起的功能障碍敏感.
科学领域:
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
- 精神病学是一个精神病学.
背景情况:
- 糖尿病与神经精神疾病 (如抑郁和焦虑) 的风险增加有关.
- 这种联系背后的机制尚不清楚,但临床前模型显示慢性高血糖 (HG) 诱导神经炎症和抑郁行为.
- 恐惧调节可以在HG模型中提供更具体的情感功能障碍评估.
研究的目的:
- 为了调查HG小鼠中增强的恐惧记忆是否对抗抑郁药FLX (fluoxetine) 敏感.
- 探索负价值系统在HG相关的情感功能障碍中的作用.
- 为了确认基底侧杏仁体对HG诱导的功能障碍的敏感性.
主要方法:
- 雄性C57BL/6J小鼠接受了链毒素 (STZ) 或酸盐缓冲剂以诱导HG.
- 诱导后四周,小鼠每天接受FLX (10 mg/kg) 或盐水治疗,持续两周.
- 行为测试包括大理石埋葬,开放场地和恐惧调节.
主要成果:
- HG小鼠在恐惧调节过程中减少了大理石埋葬,减少了露天活动,增加了结.
- FLX治疗没有改变HG诱导的埋葬或活动变化.
- FLX成功地逆转了由HG促进的结,独立于海马Tnf表达.
结论:
- 恐惧调节是一种可行的工具,用于研究HG相关的负价值系统变化.
- 结果证实了基底侧杏仁核对HG诱导的功能障碍的敏感性.
- 在糖尿病模型中,抗抑郁药治疗可以调节特定的恐惧记忆缺陷.
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