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12.9/Q1,宁波大学 + 郑州大学联合揭秘!meRIP-seq+RNA-seq 破解 m⁶A-KDM6B-JAK1 轴,逆转动脉粥样硬化新靶点诞生!

  • 2026-03-31 10:41:39
12.9/Q1,宁波大学 + 郑州大学联合揭秘!meRIP-seq+RNA-seq 破解 m⁶A-KDM6B-JAK1 轴,逆转动脉粥样硬化新靶点诞生!

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中文标题METTL3/RBM15增强Kdm6b mRNA的稳定性,促进STAT1介导的巨噬细胞活化和动脉粥样硬化

发表期刊SPRINGER NATURE

发布时间:2025年12月

影响因子:12.9

01

研究背景

Hot

动脉粥样硬化(AS)是心血管疾病的核心病因,巨噬细胞活化在其进展中起关键作用。m⁶A 修饰参与巨噬细胞功能调控,但在巨噬细胞分化、活化过程中的动态调控网络尚未明确。KDM6B 作为组蛋白去甲基化酶,其在 AS 中是否受 m⁶A 修饰调控及具体机制亟待探究。

02

研究方法

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结合 meRIP-seq 和 RNA-seq 解析巨噬细胞分化(GM-CSF 诱导)与活化(IFN-γ 刺激)过程中 m⁶A 修饰谱;通过 Western blot、Co-IP、RIP-qPCR 验证分子相互作用;利用基因沉默、药物干预(METTL3 抑制剂 STM2457、KDM6B 抑制剂 GSKJ1)探究通路机制;构建巨噬细胞特异性 Kdm6b 敲除(CKO)小鼠模型,结合流式细胞术、组织染色评估体内 AS 进展;通过共培养实验分析巨噬细胞与细胞毒性 T 淋巴细胞(CTL)的相互作用。

03

研究结果

Hot

1

巨噬细胞分化与活化过程中 m⁶A 修饰动态变化

meRIP-seq 显示,巨噬细胞分化阶段(0D→3D→5D),m⁶A 修饰位点密度和含 m⁶A 修饰的 mRNA 数量逐渐增加,富集于免疫炎症、JAK-STAT 等通路(图 1a-e);活化阶段(IFN-γ 刺激),m⁶A 修饰与 mRNA 表达呈正相关,特异性调控 Stat1、Kdm6b 等促炎基因及表观遗传酶(图 2d、i),证实 m⁶A 修饰的阶段特异性调控作用。

2

METTL3/RBM15 通过 m⁶A 修饰稳定 Kdm6b mRNA

IFN-γ 刺激后,METTL3 与 Kdm6b mRNA 结合增强,RBM15 结合减弱(图 5a);METTL3 抑制剂 STM2457 可降低 Kdm6b mRNA 的 m⁶A 修饰及稳定性(图 5b、d),而 Ythdc1/2 作为 m⁶A 阅读蛋白,可促进 Kdm6b mRNA 稳定(图 5f-g),表明 m⁶A 修饰通过 METTL3/Ythdc1/2 轴调控 Kdm6b 表达。

3

KDM6B 通过去甲基化 JAK1 促进 STAT1 磷酸化

KDM6B 抑制剂 GSKJ1 可抑制 IFN-γ 诱导的巨噬细胞脂质摄取、ROS 产生(图 3a-b),并阻断 STAT1 磷酸化(图 3f)。机制上,KDM6B 与 JAK1 相互作用并使其去甲基化,促进 JAK1 磷酸化,进而激活 STAT1(图 4c-e),且该过程依赖 KDM6B 的去甲基化活性。

4

KDM6B 介导的巨噬细胞活化促进 CTL 毒性,加速 AS 进展

共培养实验显示,IFN-γ 活化的巨噬细胞可增强 CTL 毒性(PD-1+GZMB + 细胞比例升高),而 KDM6B 或 STAT1 抑制可逆转该效应(图 6d-e)。巨噬细胞特异性 Kdm6b 敲除小鼠中,主动脉 AS 病灶面积缩小,胶原沉积和巨噬细胞浸润减少,CTL 活化比例降低(图 7a-g),证实 KDM6B 通过调控巨噬细胞 - CTL 相互作用加速 AS。

04

文章小结

Hot

本研究揭示 m⁶A 修饰在巨噬细胞分化与活化中的动态调控作用,明确 METTL3/RBM15 通过 m⁶A 修饰稳定 Kdm6b mRNA,KDM6B 进而去甲基化 JAK1 激活 STAT1,促进巨噬细胞活化及 CTL 毒性,最终加速 AS。靶向该通路或为 AS 治疗提供新策略。

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往期回顾

4.2/Q2,多组学数据库助力发现!血浆 EVs 中 3 类 lncRNAs 破解 PCOS 合并 MetS 诊断难题

2024国自然医学中标名单揭晓,这些项目值得关注!

3.4/Q1,儿童和青少年偏头痛负担的上升趋势:1990 年至 2021 年的综合分析及未来预测

3.9/Q3,多组学 “透视” 肝癌!西湖大学团队用 scTrio-seq2+TCGA 揭秘:甲基化距离比基因表达更准推肿瘤进化

20.0/Q1,顶刊发文密码:当单细胞测序遇上异种移植,如何实现从“相关性”到“因果性”的跨越?

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  1. CONNECT:[ UseTime:0.001117s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001663s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000686s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000628s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001350s ]
  6. SELECT * FROM `set` [ RunTime:0.000620s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001468s ]
  8. SELECT * FROM `article` WHERE `id` = 482129 LIMIT 1 [ RunTime:0.001098s ]
  9. UPDATE `article` SET `lasttime` = 1777155672 WHERE `id` = 482129 [ RunTime:0.026277s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000650s ]
  11. SELECT * FROM `article` WHERE `id` < 482129 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001091s ]
  12. SELECT * FROM `article` WHERE `id` > 482129 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001215s ]
  13. SELECT * FROM `article` WHERE `id` < 482129 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.006188s ]
  14. SELECT * FROM `article` WHERE `id` < 482129 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001404s ]
  15. SELECT * FROM `article` WHERE `id` < 482129 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007518s ]
0.217377s