当前位置:首页>郑州>IF20.4!郑州大学博士一作,直接拿下《Cell》大子刊!揭示DMV-肠轴,破解睡眠伤肠新机制!

IF20.4!郑州大学博士一作,直接拿下《Cell》大子刊!揭示DMV-肠轴,破解睡眠伤肠新机制!

  • 2026-07-03 14:05:11
IF20.4!郑州大学博士一作,直接拿下《Cell》大子刊!揭示DMV-肠轴,破解睡眠伤肠新机制!
引言:

睡眠紊乱是诱发多种慢性胃肠疾病的重要危险因素,二者关联已被广泛证实,但大脑如何将睡眠异常信号传导至肠道,具体调控通路仍未阐明。肠道干细胞(ISC)是维持肠道上皮稳态与损伤修复的核心细胞,睡眠缺失会造成肠道干细胞功能损伤,但其受损的分子机制一直有待解析。

中国农业大学联合中国科学院深圳先进院、郑州大学等团队《Cell Stem Cell》发表题为“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”的研究,旨在阐明迷走神经背运动核-迷走神经-5-羟色胺信号轴介导睡眠紊乱引发肠道干细胞功能异常、诱发肠道病变的完整分子机制。

— literature interpretation ——

文献解读

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2月

影响因子:20.4/Q1

01
研究背景

睡眠紊乱是高发的公共健康问题,可诱发肠道稳态失衡与消化道疾病。迷走神经-5-羟色胺通路在脑-肠信号传导中发挥重要作用,然而睡眠紊乱通过该通路调控肠道干细胞功能的具体分子机制仍尚不明确。

02
研究方法

动物与细胞模型:构建睡眠剥夺小鼠模型,培养肠道类器官与RIN-14B细胞,建立基因编辑小鼠品系。

基因调控:利用AAV病毒、Cre-loxP系统实现脑区基因操控与肠道Htr4、Tph1等基因敲除。

检测技术:采用电生理记录、免疫染色、Western blot、代谢组、ELISA及活性氧荧光检测。

—— Research findings ——

研究结果

01.睡眠剥夺诱导肠道干细胞损伤与肠结构异常

睡眠剥夺模型小鼠清醒占比大幅升高,快波、慢波睡眠显著下降。小肠绒毛与隐突结构缩短,增殖细胞及潘氏细胞减少,Lgr5、Olfm4标记的肠道干细胞丰度持续降低。BrdU示踪显示上皮细胞迁移周转减慢,类器官形成及生长出芽能力受抑,辐射修复能力下降。该效应不依赖肠道菌群,明确睡眠剥夺可致肠道干细胞缺陷与结构病理改变(图1)

图1.睡眠剥夺致肠道干细胞及结构损伤

复现建议:机械法/水环境法构建小鼠急性睡眠剥夺模型。取小肠H&E染色观绒毛/隐窝,免疫荧光/组化检测Olfm4、Ki67、Lysozyme标记干细胞/增殖/潘氏细胞。BrdU示踪上皮更新,辐射模型评修复。统计用独立t检验及单因素方差分析。

02.睡眠剥夺激活肠道翻译应激与氧化应激通路

蛋白质组学显示睡眠剥夺主要激活翻译应激与干细胞稳态调控通路。肠道eIF2α磷酸化升高,应激颗粒大量形成,ATF4、GADD34等关键蛋白上调,自噬与泛素化降解同步活化。肠道ROS水平显著升高,补充维C、NAC等抗氧化剂可有效逆转干细胞数量、组织形态及应激蛋白异常,证实氧化应激是介导肠道损伤的关键环节(图2)

图2.睡眠紊乱激活肠道应激通路

复现建议:提取小肠组织蛋白/RNA,WB检测p-eIF2α、ATF4、GADD34、LC3B、泛素化等。DHE荧光染色原位测ROS。维生素C、NAC抗氧化干预,对比应激指标与肠表型。多组比较用单因素方差分析。

03.睡眠紊乱上调肠道5-HT并损伤干细胞功能

代谢检测发现睡眠剥夺小鼠肠道及血清5-HT含量显著上升,肠嗜铬细胞增多。体外类器官实验显示5-HT剂量依赖性提升ROS并抑制增殖出芽。体内外干预均表明,补充5-HT可复刻肠道结构破坏与干细胞减少表型。敲除5-HT合成关键基因Tph1后,睡眠剥夺无法诱导5-HT升高,肠道损伤明显缓解,证明5-HT是核心介导因子(图3)

图3.5-羟色胺异常介导干细胞功能损伤

复现建议:ELISA/靶向代谢组测肠道/血清5-HT。免疫荧光标记肠嗜铬细胞与5-HT。体外类器官梯度加5-HT,检测出芽、生长及ROS。利用Tph1敲除鼠阻断内源5-HT,观睡眠剥夺后干细胞表型。统计用t检验。

04.5-HT通过HTR4受体介导肠道损伤效应

单细胞测序证实肠道干细胞高表达5-HT受体HTR4,睡眠剥夺进一步上调其表达。HTR4激动剂可模拟5-HT作用,提升ROS并抑制类器官生长,拮抗剂则可逆转损伤。肠道上皮特异性敲除Htr4后,睡眠剥夺及5-HT刺激均无法引发肠道结构破坏与干细胞减少,确定HTR4是介导损伤的关键受体(图4)

图4.HTR4受体介导5-羟色胺肠道损伤作用

复现建议:单细胞数据析肠道Htr4表达。HTR4激动剂/拮抗剂处理类器官与小鼠。构建肠上皮Htr4条件敲除鼠,造模后检肠形态、干细胞及氧化应激。多组数据用方差分析。

05.迷走神经介导睡眠信号向肠道传递

切断膈下迷走神经后,睡眠剥夺小鼠肠道5-HT恢复正常,干细胞数量、组织形态及应激指标均趋近正常。神经示踪显示肠道胆碱能神经纤维广泛分布于肠上皮周围,证实迷走神经是将中枢睡眠紊乱信号传至肠道的关键通路,交感神经及HPA轴均不参与该调控(图5)

图5.迷走神经介导脑-肠信号传递

复现建议:构建膈下双侧迷走切断模型,设假手术组,再行睡眠剥夺。检肠道5-HT、干细胞及形态。荧光金逆行示踪、免疫荧光观迷走神经分布。对比两组差异,统计用单因素方差分析。

06.乙酰胆碱调控肠道5-HT稳态的分子机制

睡眠剥夺使肠道乙酰胆碱含量显著升高。补充外源ACh可上调肠道5-HT并重现损伤表型;毒蕈碱型受体拮抗剂阿托品可阻断该效应。肠道上皮主要表达Chrm3受体,特异性敲除Chrm3后ACh无法诱导5-HT升高。机制上ACh既促进肠嗜铬细胞释放5-HT,又下调SERT表达抑制重摄取,双重作用致5-HT蓄积(图6)

图6.乙酰胆碱调控肠道5-羟色胺稳态

复现建议:ELISA检肠道乙酰胆碱。乙酰胆碱/卡巴胆碱体外处理RIN-14B细胞及小鼠,予毒蕈碱/烟碱拮抗剂干预。qPCR/WB检SERT表达,验乙酰胆碱对5-HT释/摄双重调控。统计用t检验与方差分析。

07.迷走神经背核作为中枢调控核心的验证

c-Fos染色及钙成像显示睡眠剥夺持续激活脑干迷走神经背核。伪狂犬病毒示踪证明DMV是中枢向肠道传递信号的核心脑区。化学遗传激活DMV可升高肠道ACh与5-HT并诱导干细胞损伤;特异性抑制DMV活性则能逆转睡眠剥夺带来的肠道病理改变,证实DMV是启动该调控轴的中枢核心(图7)

图7.迷走神经背核的中枢调控功能验证

复现建议:脑立体定位向DMV注GCamp6s病毒,光纤钙成像记睡眠剥夺前后神经元活动。PRV逆行示踪明脑-肠投射。DMV注化学遗传病毒,CNO给药,检下游乙酰胆碱、5-HT及肠表型。统计用重复测量方差分析。

—— Article summary——

文章小结

本研究发现睡眠紊乱会异常激活迷走神经背运动核,促使迷走神经释放大量乙酰胆碱,进而升高肠道5-羟色胺水平;5-羟色胺通过HTR4受体诱导肠道干细胞氧化应激、功能受损,引发肠道病变,该神经内分泌轴为睡眠相关胃肠疾病提供了新的干预靶点与治疗思路。

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  1. CONNECT:[ UseTime:0.000821s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000533s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000298s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000266s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000495s ]
  6. SELECT * FROM `set` [ RunTime:0.000219s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000573s ]
  8. SELECT * FROM `article` WHERE `id` = 557571 LIMIT 1 [ RunTime:0.008614s ]
  9. UPDATE `article` SET `lasttime` = 1783419316 WHERE `id` = 557571 [ RunTime:0.012185s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000273s ]
  11. SELECT * FROM `article` WHERE `id` < 557571 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001833s ]
  12. SELECT * FROM `article` WHERE `id` > 557571 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000479s ]
  13. SELECT * FROM `article` WHERE `id` < 557571 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.007026s ]
  14. SELECT * FROM `article` WHERE `id` < 557571 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002800s ]
  15. SELECT * FROM `article` WHERE `id` < 557571 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003876s ]
0.186406s