当前位置:首页>南京>IF=10.7,南京大学基于高通量筛选获新型【NLRP3抑制剂CeeNU】!从表型到分子位点,老药新用挖掘炎症小体调控新分子

IF=10.7,南京大学基于高通量筛选获新型【NLRP3抑制剂CeeNU】!从表型到分子位点,老药新用挖掘炎症小体调控新分子

  • 2026-05-10 21:04:33
IF=10.7,南京大学基于高通量筛选获新型【NLRP3抑制剂CeeNU】!从表型到分子位点,老药新用挖掘炎症小体调控新分子

小汇今日高分文献分享

IF=10.7

NLRP3炎症小体+结构域位点验证

高通量筛选锁定老药新功能

破解焦亡驱动炎症调控研究瓶颈!

NLRP3炎症小体介导的细胞焦亡多发性硬化症、败血症、痛风性关节炎等无菌性炎症疾病病理进程中的重要环节。现有干预策略存在特异性不足、成药性欠佳等问题,寻找能够选择性抑制NLRP3组装的小分子是领域内的关键方向。今天小汇分享的这篇文章,研究精准打通药物筛选+靶点机制+神经炎症干预三大前沿热点,用高通量细胞表型筛选实现老药新功能发现(CeeNU),依托DARTS+CETSA+SPR等多技术联用阐明药物-靶点直接结合(NLRP3-R335),为NLRP3炎症小体调控在神经病学研究领域的应用提供了典型范例。

2026年4月23日,南京大学鼓楼医院徐运团队团队MedComm上发表了题为High-Throughput Screening Reveals That CeeNU Acts as a New NLRP3 Inflammasome Inhibitor”的文章,研究基于老药新用思路,通过ATP活性检测法(CellTiter‑Glo)高通量筛选2747种FDA已上市药物,鉴定出抗肿瘤洛莫司汀(CeeNU)可作为NLRP3炎症小体抑制剂。机制上,CeeNU直接结合NLRP3蛋白的NACHT结构域第335位精氨酸(R335),阻断NLRP3-NEK7相互作用及ASC寡聚化,在不影响上游信号(K+外流、ROS)的前提下特异性地抑制炎症小体组装。在MOG诱导的EAE模型中,CeeNU有效缓解了免疫细胞浸润与髓鞘脱失,为自身免疫性疾病的研究提供了新的分子工具。

现有NLRP3抑制剂多聚焦于功能抑制,对药物与靶点的直接结合位点解析不足。研究以高通量筛选为核心技术,以CeeNU为研究分子,通过直接靶向NLRP3、阻断复合物组装的方式,调控NLRP3介导的焦亡通路,通过高通量筛选(表型)→靶点确证(DARTS/CETSA/SPR)→结合位点定位(分子对接+点突变)→体内功能评估(EAE模型)的完整研究闭环,从分子、细胞到动物层面系统阐明CeeNU的作用机制。研究不仅完善了NLRP3炎症小体的小分子调控网络,为细胞焦亡相关炎症机制研究提供新的分子工具,也建立了一套可复制的老药新用+炎症靶点筛选研究范式,为NLRP3相关研究提供全新思路与理论支撑!

研究思路

  1. 高通量筛选:采用CellTiter‑Glo法对2747种已获批化合物高通量筛选,以脂多糖/尼日利亚菌素(LPS/nigericin)诱导NLRP3焦亡模型,筛选可抑制NLRP3活化的小分子化合物。

  2. 细胞表型验证:在人/小鼠巨噬细胞、小胶质细胞中,验证CeeNU对NLRP3活化、焦亡及炎症因子释放的调控作用,明确作用有效性。

  3. 特异性鉴定:检测CeeNU对AIM2、NLRC4炎症小体及上游信号的影响,明确其对NLRP3炎症小体的作用特异性。

  4. 分子互作与位点解析:通过蛋白互作、分子对接、位点突变实验,解析CeeNU与NLRP3的结合结构域与关键氨基酸位点。

  5. 体内模型验证:构建多种小鼠体内模型,验证CeeNU对NLRP3介导炎症反应与病理损伤的调控作用。

论文亮点解析

1、筛选策略创新:老药新用高通量筛选,降低研究风险与周期

依托2747种已获批化合物库开展筛选,直接挖掘NLRP3调控分子CeeNU,缩短分子发现周期。

2、靶点机制创新:精准结合NLRP3关键位点,作用机制清晰深入

明确CeeNU结合NLRP3的NACHT结构域Arg335位点,从分子水平阐释抑制机制。

3、作用特异性创新:高选择性靶向NLRP3,不干扰同源炎症小体

仅抑制NLRP3活化,对AIM2、NLRC4无影响,不干扰上游ROS与K+外流信号。

4. 验证体系创新:多模型完整闭环,覆盖中枢与外周免疫调控

在巨噬细胞、小胶质细胞及多种动物模型中验证,提升研究可靠性与拓展价值。

结果图示

高通量筛选流程与CeeNU活性鉴定

采用CellTiter-Glo法对2747种化合物进行高通量筛选,发现CeeNU可显著改善LPS/nigericin诱导的THP-1细胞焦亡相关损伤,在≤150 μM浓度下无明显细胞毒性,调控作用呈剂量依赖性。

图1.高通量筛选鉴定出CeeNU是一种有效的NLRP3抑制剂。

CeeNU对人THP-1巨噬细胞NLRP3通路的调控作用

在LPS预处理的THP-1细胞中,CeeNU呈剂量依赖性地减少nigericin或MSU诱导的IL-1β分泌和LDH释放。Western Blot显示其抑制caspase-1和GSDMD的切割,电镜结果证实其显著减少了细胞膜孔的形成。

图2.CeeNU在人巨噬细胞中以NLRP3依赖性方式显著抑制焦亡和IL-1β释放。

CeeNU对小鼠巨噬细胞NLRP3活化的调控作用

CeeNU处理可显著降低小鼠BMDM细胞中由ATP或尼日利亚菌素触发的IL-1β释放与LDH泄漏。免疫印迹结果进一步证实,CeeNU有效抑制了caspase-1(p20)和GSDMD-NT的产生,且对NLRP3和pro-IL-1β基础表达无影响。

图3.CeeNU抑制小鼠巨噬细胞中的焦亡性细胞死亡。

CeeNU对炎症小体的选择性鉴定

CeeNU处理不影响poly(dA:dT)或鞭毛蛋白激活的AIM2与NLRC4炎症小体,表明其选择性作用于NLRP3。在Nlrp3-/-和Gsdmd-/- BMDM中,CeeNU对IL-1β和LDH的抑制作用消失,证实其依赖于NLRP3-GSDMD通路。

图4.CeeNU是NLRP3炎症小体的特异性抑制剂。

CeeNU对NLRP3复合物组装体的调控作用

免疫荧光显示CeeNU抑制了ASC斑点的形成。化学交联实验表明,CeeNU剂量依赖性阻断ASC寡聚化。Co-IP结果证实,CeeNU处理破坏了NLRP3与NEK7的蛋白相互作用,这是抑制NLRP3组装的关键步骤。

图5.CeeNU特异性抑制NLRP3炎症小体的组装。

CeeNU与NLRP3的分子互作与位点鉴定

CETSA和DARTS实验证实CeeNU直接结合NLRP3并增强其热稳定性。SPR测定其结合亲和力KD为19.26 μmol/L。分子对接和点突变实验确定,CeeNU通过与NLRP3 NACHT结构域的Arg335(R335)形成氢键而发挥作用。

图6.CeeNU直接结合于NLRP3的Arg335。

CeeNU对MSU诱导腹膜炎与关节炎的调控作用

在MSU诱导的腹膜炎模型中,CeeNU处理减少腹腔中性粒细胞和单核细胞数量,并降低IL-1β和IL-6水平。在痛风性关节炎模型中,CeeNU减轻了关节肿胀,减少了组织损伤和caspase-1活性。

图7.CeeNU显著减轻MSU诱导的腹膜炎和痛风性关节炎。

CeeNU对MOG诱导EAE模型的调控作用

CeeNU干预显著降低EAE模型小鼠的临床评分。脊髓LFB与H&E染色显示,CeeNU减少了免疫细胞浸润与髓鞘脱失。流式分析表明,CeeNU减少了脑内CD4+和CD8+ T细胞浸润及炎症因子表达。

图8.CeeNU有效预防MOG诱导的EAE。

参考文献:

https://doi.org/10.1002/mco2.70695

#NLRP3 #炎症小体 #高通量筛选 #细胞焦亡 #老药新用 #课题指导 #定制分析 #基础实验外包 #药物筛选 

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  1. CONNECT:[ UseTime:0.000956s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001685s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000831s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000788s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001470s ]
  6. SELECT * FROM `set` [ RunTime:0.000634s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001671s ]
  8. SELECT * FROM `article` WHERE `id` = 550455 LIMIT 1 [ RunTime:0.001225s ]
  9. UPDATE `article` SET `lasttime` = 1778533892 WHERE `id` = 550455 [ RunTime:0.027569s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.005224s ]
  11. SELECT * FROM `article` WHERE `id` < 550455 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001474s ]
  12. SELECT * FROM `article` WHERE `id` > 550455 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001183s ]
  13. SELECT * FROM `article` WHERE `id` < 550455 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.010496s ]
  14. SELECT * FROM `article` WHERE `id` < 550455 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002110s ]
  15. SELECT * FROM `article` WHERE `id` < 550455 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002797s ]
0.262941s