当前位置:首页>南京>IF10.1!南京大学副院长最新研究拿下《Nature》子刊,揭示孤独症小脑神经免疫新机制,并提出潜在干预新策略!

IF10.1!南京大学副院长最新研究拿下《Nature》子刊,揭示孤独症小脑神经免疫新机制,并提出潜在干预新策略!

  • 2026-03-17 19:37:43
IF10.1!南京大学副院长最新研究拿下《Nature》子刊,揭示孤独症小脑神经免疫新机制,并提出潜在干预新策略!

引言

大脑里藏着一位“社交调音师”,它的名字叫IL-17A。

南京大学朱景宁团队《Molecular Psychiatry》发文,揭示小胶质细胞源IL-17A是调控Purkinje细胞兴奋性的关键:

○ 自闭症模型Fmr1-KO小鼠小脑中,IL-17A异常升高;

○ 它不由外周免疫细胞分泌,而由小脑局部小胶质细胞专门产生;

○ 它精准作用于Purkinje细胞IL-17RA受体,经NF-κB通路调节抑制性突触,校准神经元放电。

💡这一发现揭示了免疫分子的神经发育“隐形之手”📌,并为自闭症治疗提供新策略——激活小胶质细胞IL-17A或直接补充之,有望成为“免疫+神经”双靶点干预新利器❗

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文献解读

标题:小脑小胶质细胞衍生的IL-17A减轻自闭症相关的行为和突触缺陷

发表期刊Molecular Psychiatry

发表时间:2026年1月

影响因子: IF10.1

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研究背景

自闭症谱系障碍的核心症状包括社交障碍和重复刻板行为。小脑,特别是浦肯野细胞,在自闭症发病中起关键作用。白细胞介素-17A作为一种促炎因子,近年被发现参与神经免疫调控,但脑内固有细胞来源的IL-17A在小脑中的功能及其在单基因自闭症模型(如Fmr1-KO小鼠)中的作用尚不明确。

研究思路

1.动物模型:使用Fmr1-KO小鼠(脆性X综合征模型)和野生型小鼠。

2.分子技术:转录组测序、实时定量聚合酶链反应、Western blot、免疫荧光染色、电化学发光免疫分析。

3.电生理:全细胞膜片钳记录PC的自发动作电位频率、sIPSC和sEPSC。

4.病毒与药物干预:慢病毒/腺相关病毒介导的shRNA敲低IL-17RA、立体定位注射IL-17A或IL-17RA抗体、腹腔注射poly(I:C)/脂多糖、PLX3397耗竭小胶质细胞。

5.行为学:三箱社交实验、大理石埋藏实验。

6.数据分析:差异表达基因筛选、京都基因与基因组百科全书通路富集、流式细胞术。

研究结果

01

IL-17A在Fmr1-KO小鼠小脑中的表达升高

Fmr1-KO小鼠小脑PC自发动作电位频率降低,sIPSC幅值升高(图1a-e)。转录组测序显示IL-17信号通路激活,IL-17A及其受体IL-17RA表达显著上调(图1f-k)。

图1 Fmr1基因敲除小鼠小脑中异常的多巴胺能神经元(PC)活性及IL-17A信号传导

02

小脑IL-17A仅由小胶质细胞产生,通过激活PC增强社交能力

IL-17A仅表达于小胶质细胞,IL-17RA仅表达于PC(图2a-g)。IL-17A可增加WT小鼠 PC自发动作电位频率、降低sIPSC幅值(图3a-e),并提高社交偏好(图3i-k)。

图3 小脑IL-17A信号通路通过增强野生型小鼠(WT mice)的前脑皮层(PC)兴奋性改善社会行为

03

IL-17A挽救Fmr1-KO小鼠PC的低兴奋性并改善自闭症样行为

IL-17A可恢复Fmr1-KO小鼠 PC低兴奋性、降低sIPSC幅值(图5a-e),该效应依赖NF-κB通路。行为上,IL-17A显著改善社交障碍和减少重复刻板行为(图5f-h)。

图4 PC中IL-17RA的敲除导致神经元低兴奋性及ASD样行为

图5 IL-17A可改善Fmr1基因敲除小鼠的小脑浦肯野细胞兴奋性及自闭症样行为

04

Poly(I:C)处理增强小脑小胶质细胞来源的IL-17A并改善Fmr1-KO小鼠的自闭症样表型

腹腔注射poly(I:C)(而非LPS)可特异性升高Fmr1-KO小鼠小胶质细胞来源的IL-17A(图6a-c),激活小胶质细胞中IL-17通路(图6e-f)。poly(I:C)显著改善Fmr1-KO小鼠社交和重复行为(图6i-j),该效应可被IL-17RA抗体或小胶质细胞耗竭阻断(图6i-j)。

图6 聚(I:C)通过增强小脑小胶质细胞释放IL-17A改善Fmr1基因敲除小鼠的自闭症样行为

文章小结

本研究揭示小脑小胶质细胞来源的白细胞介素-17A通过IL-17RA-NF-κB通路调节浦肯野细胞兴奋性,进而调控社交行为。在Fmr1-KO小鼠中,IL-17A表达代偿性升高,外源性给予IL-17Apoly(I:C)可增强该信号,挽救PC功能及自闭症样行为。该研究揭示小脑神经免疫调控社交行为的新机制,为自闭症治疗提供潜在靶点。

文章思路清晰易复刻,如果有想进行同款数据分析的同学,欢迎联系筑梦科研!

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2.

IF52.7!四川大学华西医院副院长拿下《STTT》!构建RMzyme平台,揭秘RNA修饰酶的全景图谱!

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IF5.9!别再只盯着虚拟敲除了!虚拟过表达+Geneformer模型来了,单细胞纯生信发文简直手到擒来!

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  1. CONNECT:[ UseTime:0.000357s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000639s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000237s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.004355s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000550s ]
  6. SELECT * FROM `set` [ RunTime:0.005450s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000697s ]
  8. SELECT * FROM `article` WHERE `id` = 503536 LIMIT 1 [ RunTime:0.001632s ]
  9. UPDATE `article` SET `lasttime` = 1775542512 WHERE `id` = 503536 [ RunTime:0.001678s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.002150s ]
  11. SELECT * FROM `article` WHERE `id` < 503536 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.011214s ]
  12. SELECT * FROM `article` WHERE `id` > 503536 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.033753s ]
  13. SELECT * FROM `article` WHERE `id` < 503536 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.058309s ]
  14. SELECT * FROM `article` WHERE `id` < 503536 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.044052s ]
  15. SELECT * FROM `article` WHERE `id` < 503536 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.017732s ]
0.330011s