当前位置:首页>郑州>太猛了!郑州大学博士生发《Cell》大子刊!揭示缺觉激活 DMV-5-HT 轴,直接损伤肠道干细胞!

太猛了!郑州大学博士生发《Cell》大子刊!揭示缺觉激活 DMV-5-HT 轴,直接损伤肠道干细胞!

  • 2026-05-30 17:58:15
太猛了!郑州大学博士生发《Cell》大子刊!揭示缺觉激活 DMV-5-HT 轴,直接损伤肠道干细胞!

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大家有没有发现,熬夜后肠胃总不舒服😣?其实睡眠和肠道藏着一条看不见的 “秘密通道”!

郑州大学于政权团队就在顶级期刊《Cell Stem Cell》上揭晓答案🧬。缺觉会先激活大脑特定区域,再通过迷走神经传递信号,让肠道出现一系列异常,最终悄悄损伤我们的肠道干细胞,这就是熬夜伤肠的真实机制~

标题睡眠障碍会引发迷走神经回路异常激活,并诱发肠道干细胞功能障碍

发表期刊:Cell Stem Cell

发表时间:2026年

影响因子:20.4/Q1

01

研究背景

睡眠不足已成为全球性健康问题。流行病学数据显示,失眠人群患消化道疾病的风险显著升高。但在此之前,大脑如何将缺觉的负面影响传递至肠道,机制并不明确。

02

研究目的

该研究旨在揭示急性睡眠剥夺损害肠道屏障功能的神经通路机制,特别聚焦于哪些脑区、哪类神经递质在这一过程中扮演关键角色,并探索潜在的干预靶点。

03

研究方法亮点

1️⃣建立急性睡眠剥夺模型:小鼠连熬两天,肠道立马受损,绒毛缩短、干细胞减少。

2️⃣全脑筛查锁定关键脑区:全脑扫描发现,迷走神经背核(DMV)异常活跃,它是控制肠道的“总指挥部”。

3️⃣病毒示踪确认连接:病毒示踪证实,大脑DMV确实有一条直通肠道的神经“专线”。

4️⃣做验证:人为激活DMV,不缺觉肠也坏;抑制DMV,缺觉也不伤肠。坐实DMV是罪魁祸首。

1、睡眠剥夺后,肠道结构先出问题

小鼠连续两天睡眠不足后,肠道里的绒毛和隐窝都明显变短了,肠道干细胞、潘氏细胞数量也随之减少。细胞标记追踪发现,肠道细胞向上迁移的速度变慢,意味着肠道自身的更新修复能力大打折扣。后续体外培养实验也印证了这一点:缺觉小鼠的肠道隐窝,很难再培育出正常的肠道类器官(图1)

图1.短期SD显著损害ISC功能并破坏肠上皮细胞更新

复现思路

想验证一个处理是否影响肠道干细胞,别只看HE染色。建议加上Lgr5或Olfm4的免疫组化,再用BrdU脉冲示踪看细胞迁移。这三步做下来,结论就比较扎实了。

2、缺觉激活了肠干细胞的翻译应激反应

蛋白检测结果发现,睡眠不足会让肠道隐窝启动翻译抑制的应激反应。相关应激信号、应激小体明显变多,多种应激相关蛋白水平也随之升高;同时细胞内有害自由基增多,蛋白异常降解也加剧了。而补充维生素 C 或 NAC 后,这些异常情况都能得到改善(图2)。  

图2.短期SD通过激活翻译应激反应损害ISCs功能

复现思路

拿到处理组和对照组的组织后,不妨先做个非靶向蛋白组学,看看哪些通路富集。缺觉这种全身性干预,直接猜分子容易跑偏,让数据告诉你该看什么~

3、肠道5-HT飙升是缺觉的关键环节

长期睡眠不足的小鼠,肠道和血液里的5 - 羟色胺含量明显变高,肠道分泌这类物质的 EC 细胞数量也随之增多。

实验发现,给肠道类器官外加 5-HT 后,细胞内活性氧会增多,肠道正常生长也受到抑制;往小鼠体内注射 5-HT,还能直接模拟出睡眠不足引发的肠道异常状态。

敲除合成 5-HT 关键基因 Tph1 的小鼠,即便长期缺觉,肠道也基本不会出现损伤(图3)

图3.急性SD可破坏5-HT稳态并诱导肠道氧化应激

复现思路

如果怀疑某个生理状态改变会影响肠道,可以先把神经递质扫一遍,用LC-MS/MS做靶向代谢组学。

4、干细胞上的HTR4受体介5-HT的伤害

单细胞检测发现,Htr4 基因在肠道干细胞中活跃度很高。睡眠不足时,肠道里对应的 HTR4 蛋白含量也会明显增加。实验中,用 HTR4 激活剂处理肠道类器官,会和 5 - 羟色胺一样抑制肠道正常生长;而使用抑制剂就能逆转这种不良影响。针对肠道专门敲除 Htr4 基因后,小鼠就算熬夜缺觉,肠道干细胞受到的损伤也大幅减轻了(图4)

图4.间充质干细胞通过其受体HTR4响应5-羟色胺

复现思路

找到关键配体后,下一步自然是找受体。先用公共单细胞数据看受体表达谱,锁定候选靶点,再用类器官体系做配体和拮抗剂的交叉验证。

5、切断迷走神经,缺觉就伤不到肠道了

给小鼠切断双侧迷走神经后,即便再让它睡眠不足,其肠道干细胞数量也能基本恢复正常,肠道隐窝深度回归常态,体内 5-HT 水平也不再异常升高。染色结果显示,缺觉会刺激大脑多个区域活跃,而仅 DMV 脑区同时被示踪病毒标记,证明这个脑区和肠道之间存在直接的神经通路图5)

图5.VN激活连接SD与肠道

复现思路

想证明某个脑区到外周器官的功能连接,先用逆行病毒看解剖上的连接,再用手术切断神经看功能是否依赖这条通路。

6、乙酰胆碱通过毒蕈碱受体推高5-HT

睡眠不足的小鼠,肠道内乙酰胆碱含量会增多。给正常小鼠直接注射乙酰胆碱后,它体内的 5-HT 也会随之升高,肠道状态和缺觉的小鼠表现完全一致。使用阿托品处理后,就能阻止 5-HT 异常升高,保护肠道健康;但烟碱受体阻断剂没有这类效果图6)

图6.高浓度ACh导致肠道内5-HT过度积聚

复现思路

找到神经通路后,下一步就是鉴定下游的神经递质和受体。体内拮抗剂筛选是比较经济高效的做法

7、DMV是缺觉信号的“中继站”

实验观测到,缺觉会让 DMV 神经元长期活跃,时长可达一周。单独激活这个脑区,就能复刻出缺觉带来的肠道问题;缺觉时抑制它,肠道就不会受损伤。这证明 DMV 是整个反应通路的源头图7)

图7.DMV 是介导肠道中SD调控的中枢神经系统区域

复现思路

锁定候选脑区后,先用光纤记录看一下它是否真的被你的干预激活。然后做化学遗传学激活,看能不能复现外周表型;再做抑制实验,看能不能阻断。

简单来说,熬夜会先激活 DMV 脑区,通过神经让肠道产生过多乙酰胆碱,进而使 5-HT 大幅升高,最终损伤肠道干细胞。阿托品、特定受体阻断剂以及维 C,都能保护肠道。这说明熬夜伤肠有明确的作用路径,也有可行的干预手段。

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  1. CONNECT:[ UseTime:0.000398s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000542s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000281s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000293s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000510s ]
  6. SELECT * FROM `set` [ RunTime:0.000228s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000679s ]
  8. SELECT * FROM `article` WHERE `id` = 548029 LIMIT 1 [ RunTime:0.001336s ]
  9. UPDATE `article` SET `lasttime` = 1780293630 WHERE `id` = 548029 [ RunTime:0.001629s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000750s ]
  11. SELECT * FROM `article` WHERE `id` < 548029 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002064s ]
  12. SELECT * FROM `article` WHERE `id` > 548029 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003553s ]
  13. SELECT * FROM `article` WHERE `id` < 548029 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.006125s ]
  14. SELECT * FROM `article` WHERE `id` < 548029 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.006053s ]
  15. SELECT * FROM `article` WHERE `id` < 548029 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004305s ]
0.104491s