1.陆军军医大学基础医学院:,基础医学教学实验中心
2.陆军军医大学基础医学院:,组织胚胎学教研室
3.陆军军医大学基础医学院:,生理学教研室
Received:06 January 2025,
Revised:15 January 2025,
Published:28 February 2025
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詹悦,李容瑢,张洁,等.睡眠剥夺对海马PV中间神经元痕迹性眨眼条件反射相关放电活动的影响[J].陆军军医大学学报,2025,47(04):307-317.
ZHAN Yue,LI Rongrong,ZHANG Jie,et al.Effect of sleep deprivation on firing activity of hippocampal parvalbumin-expressing interneurons associated with trace eyeblink conditioning[J].J Army Med Univ,2025,47(04):307-317.
詹悦,李容瑢,张洁,等.睡眠剥夺对海马PV中间神经元痕迹性眨眼条件反射相关放电活动的影响[J].陆军军医大学学报,2025,47(04):307-317. DOI:10.16016/j.2097-0927.202501016.
ZHAN Yue,LI Rongrong,ZHANG Jie,et al.Effect of sleep deprivation on firing activity of hippocampal parvalbumin-expressing interneurons associated with trace eyeblink conditioning[J].J Army Med Univ,2025,47(04):307-317. DOI:10.16016/j.2097-0927.202501016.
目的
2
研究睡眠剥夺对小鼠海马小清蛋白阳性中间神经元(Parvalbumin-expressing interneuron, PV-IN)在痕迹性眨眼条件反射(Trace eyeblink conditioning,tEBC)训练过程中和恢复性睡眠期间峰电位发放活动的影响。
方法
2
15只PV-Cre小鼠随机分为睡眠剥夺组(
n
=8)和对照组(
n
=7)。2组小鼠均接受连续5 d的行为训练。睡眠剥夺组小鼠每天tEBC训练后进行1.5 h的睡眠剥夺,之后再被允许进行1.5 h的恢复性睡眠。对照组小鼠则在tEBC训练后允许自由睡眠。利用多通道记录和光遗传学刺激技术,在体条件下标记海马PV-IN。
结果
2
睡眠剥夺组小鼠的条件性眨眼反应(Conditioned eyeblink response, CR)发生率并未随训练日的增加而增加(
P
>
0.05)。在第3~5训练日,睡眠剥夺组小鼠CR发生率显著低于对照组小鼠(
P
<
0.05);与对照组相比,睡眠剥夺组小鼠海马PV-IN在tEBC训练过程中被条件刺激(Conditioned stimulus, CS)所诱发的放电增强反应显著更低(
P
<
0.05);与训练前睡眠期相比,睡眠剥夺组小鼠海马PV-IN在恢复性睡眠期尖波涟漪波振荡发生时的峰电位发放显著增强(
P
<
0.05),且增强效应显著高于对照组(
P
<
0.05);睡眠剥夺对海马非PV中间神经
元在tEBC训练过程中和恢复性睡眠期间峰电位发放活动的影响均不显著(
P
>
0.05)。
结论
2
睡眠剥夺对海马 PV-IN 在tEBC训练过程中和恢复性睡眠期间放电反应有着双重影响,这可能是睡眠剥夺引起tEBC记忆形成和巩固障碍的细胞活动机制。
Objective To investigate the effects of sleep deprivation on the firing activity of hippocampal parvalbumin-expressing interneuron (PV-IN) of mice during trace eyeblink conditioning (tEBC) training and during recovery sleep. Methods A total of 15 PV-Cre mice were randomly assigned into a sleep deprivation group (
n
=8) and a control group (
n
=7). After daily tEBC training
the sleep deprivation group experienced 1.5 h of sleep deprivation followed by 1.5 h of recovery sleep
and the control group mice were allowed to sleep freely
for 5 consecutive days. Multichannel recording and optogenetic techniques was applied to identify the hippocampal PV-IN
in vivo
. Results The sleep deprived mice failed to show significant increase in the incidence of conditioned eyeblink response (CR) across 5 training days (
P
>
0.05). On training days 3~5
the CR incidence was significantly lower in the sleep deprived mice than the control mice (
P
<
0.05). The enhancement of conditioned stimulus (CS)-evoked firing activity in hippocampal PV-INs during tEBC training was significantly lower in the sleep deprived mice when compared to the control mice (
P
<
0.05). The sleep deprived mice obtained notably strengthened firing activity of hippocampal PV-INs peri sharp wave ripple events during recovery sleep period when compared with the pre-training sleep period (
P
<
0.05)
and the enhancement was remarkably greater than that in the control mice (
P
<
0.05). Sleep deprivation had no obvious effects on the firing activity of hippocampal non PV-IN during either tEBC training or recovery sleep (
P
>
0.05). Conclusion Sleep deprivation pro
duces dual effects on the firing activities of hippocampal PV-INs during tEBC training and recovery sleep. These effects may be the cellular mechanisms of tEBC memory formation and consolidation disorders caused by sleep deprivation.
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