当前位置:首页>南京>重磅!南京大学团队揭示银屑病核心机制:角质细胞乳酸化竟是 “致病开关”,为耐药患者带来新希望

重磅!南京大学团队揭示银屑病核心机制:角质细胞乳酸化竟是 “致病开关”,为耐药患者带来新希望

  • 2026-05-17 19:12:22
重磅!南京大学团队揭示银屑病核心机制:角质细胞乳酸化竟是 “致病开关”,为耐药患者带来新希望
银屑病作为一种顽固的慢性炎症性皮肤病,困扰着全球数千万患者,传统抗 IL-17 疗法在合并代谢综合征患者中常出现耐药,背后机制一直是未解之谜。

近日,南京大学徐强、罗琼团队在 《Nature Communications》 发表重磅研究,首次发现角质细胞特异性 H4K12 乳酸化驱动非经典 IL-17 信号通路,揭开银屑病进展与治疗耐药的核心密码,为临床治疗提供全新策略!


unsetunset一、研究背景:银屑病治疗的 “卡脖子” 难题unsetunset

  • IL-17 信号是银屑病发病的核心通路,抗 IL-17A 抗体是临床一线靶向药
  • 但合并肥胖、糖尿病等代谢综合征的患者,治疗效果大幅下降
  • 银屑病皮损中角质细胞异常增殖的机制,无法用经典炎症信号完全解释
  • 银屑病与代谢紊乱高度相关,患者皮肤与血清中乳酸水平显著升高
  • 这种代谢物与炎症、角质细胞过度活化的关联,成为本研究的突破口

unsetunset二、核心研究内容:unsetunset

Figure 1:KLK8—— 角质细胞特异性 “驱动因子”,独立调控增殖

  • 银屑病患者与模型小鼠皮损中,KLK8 特异性高表达,且与病情严重程度正相关
  • IL-17A 可特异性诱导 KLK8 表达,抗 IL-17A 抗体能显著抑制
  • KLK8 仅调控角质细胞增殖、迁移,不影响经典 IL-17 通路下游趋化因子
  • 沉默 KLK8 可显著缓解小鼠银屑病症状,抑制角质细胞过度增殖

Figure 2:KLK8 掌控银屑病角质细胞的乳酸生成与转运

  • 银屑病角质细胞中 HIF-1 信号、糖酵解通路异常激活
  • KLK8 敲低可显著抑制 IL-17A 诱导的乳酸生成
  • 乳酸转运蛋白 MCT1 在银屑病皮损中高表达,与 KLK8 表达正相关
  • 抑制 MCT1 可阻断乳酸转运,减轻银屑病症状

Figure 3:高乳酸环境 → 银屑病加重 → 抗 IL-17 疗法耐药

  • 2 型糖尿病小鼠(ob/ob) 银屑病皮损更严重,对抗 IL-17A 抗体反应极差
  • 代谢紊乱患者皮肤乳酸大量积累,KLK8、MCT1 表达进一步升高
  • 外源补充乳酸会直接加剧银屑病,抵消抗 IL-17A 抗体的治疗效果

Figure 4:乳酸积累是银屑病进展与治疗耐药的 “推手”

  • 体外添加乳酸可拮抗抗 IL-17A 抗体对角质细胞增殖的抑制作用
  • 小鼠体内注射乳酸会加重皮损,降低抗体疗效
  • MCT1 抑制剂 AZD3965 可降低细胞内乳酸水平,恢复抗 IL-17A 抗体疗效

Figure 5:IL-17A 通过 KLK8 诱导 H4K12 乳酸化修饰

  • IL-17A 可特异性诱导组蛋白 H4K12 乳酸化(H4K12la),而非其他乳酸化位点
  • 银屑病患者与模型小鼠皮损中 H4K12la 显著升高
  • 沉默 KLK8、抑制乳酸转运,均可降低 H4K12la 水平
  • 抗 IL-17A 抗体可抑制 H4K12la,乳酸则逆转该作用

Figure 6:H4K12la 构建正反馈循环,驱动角质细胞疯狂增殖

  • H4K12la 主要结合在细胞周期基因启动子区域(FOXM1、CCNB2、CDC25C)
  • 这些基因在银屑病中高表达,调控角质细胞过度增殖
  • H4K12la 同时上调 KLK8 与 IL-17R,形成 IL-17RA-KLK8-H4K12la 正反馈循环
  • 该循环独立于经典炎症通路,是银屑病进展的核心动力

Figure 7:HAT1 是 H4K12 乳酸化的特异性 “书写酶”

  • 筛选发现 HAT1 是银屑病中唯一显著升高的乙酰转移酶
  • HAT1 可直接结合乳酰辅酶 A,特异性催化 H4K12 乳酸化
  • 沉默 HAT1 可降低 H4K12la 水平,抑制角质细胞增殖与迁移
  • 临床抗 IL-17 治疗可显著降低 HAT1 表达

Figure 8:沉默 HAT1 可缓解小鼠银屑病症状

  • 局部使用 si-HAT1 水凝胶,可降低小鼠皮损中 HAT1、KLK8、H4K12la 水平
  • 显著降低皮肤厚度、PASI 评分,抑制角质细胞增殖
  • 减少乳酸积累与炎症因子表达

Figure 9:靶向 H4K12la 成为银屑病治疗新策略

  • 糖酵解抑制剂(Oxamate、2-DG)可降低 H4K12la,缓解银屑病
  • 2-DG 联合低剂量抗 IL-17A 抗体,疗效显著优于单一治疗
  • 该策略可逆转乳酸诱导的治疗耐药,尤其适合合并代谢综合征患者

unsetunset三、实验及分析方法流程总结unsetunset

  • 临床样本分析:银屑病患者 / 健康人皮肤组织,检测 KLK8、H4K12la、HAT1 等表达
  • 细胞实验:HaCaT 细胞、原代角质细胞,IL-17A 刺激,基因沉默 / 过表达,检测增殖、迁移、乳酸水平、蛋白修饰
  • 动物模型:咪喹莫特诱导银屑病小鼠、ob/ob 糖尿病小鼠,局部 siRNA 给药、抗体 / 抑制剂治疗
  • 组学分析:单细胞测序、代谢组学、CUT&Tag-seq,解析信号通路与基因调控
  • 分子机制:免疫共沉淀、分子对接、点击化学,验证蛋白互作与乳酸化修饰
  • 统计分析:GraphPad Prism,t 检验、方差分析、相关性分析

unsetunset四、研究结论与展望unsetunset

核心结论

  1. 发现非经典 IL-17 信号通路:IL-17A → KLK8 → 乳酸生成 → HAT1 催化 H4K12la → 细胞周期基因激活 → 角质细胞过度增殖
  2. 揭示代谢 - 炎症 - 表观遗传串联机制:高乳酸环境强化该通路,导致抗 IL-17 疗法耐药
  3. 提出全新治疗策略:靶向 KLK8、HAT1、乳酸转运 / 糖酵解,联合抗 IL-17 抗体,可逆转耐药

未来展望

  • 开发 H4K12la、KLK8、HAT1 作为银屑病诊断与疗效评估的生物标志物
  • 推进 MCT1 抑制剂、HAT1 抑制剂、糖酵解抑制剂的临床转化
  • 合并代谢综合征的银屑病患者提供精准联合治疗方案
  • 为其他 IL-17 相关自身免疫病的耐药机制研究提供新思路

unsetunset论文信息unsetunset

  • 题目:Keratinocyte-specific H4K12 lactylation drives a non-canonical IL-17-dependent signaling in psoriasis progression in mice
  • 期刊:Nature Communications
  • DOI:10.1038/s41467-025-63791-7
  • 发表单位
    • 南京大学生命科学学院、南京大学医学院附属鼓楼医院、医药生物技术国家重点实验室
    • 四川大学华西医院皮肤性病科
    • 东南大学生命科学与技术学院、教育部发育与疾病重点实验室
    • 南京中医药大学江苏省中医药防治肿瘤协同创新中心

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  1. CONNECT:[ UseTime:0.000955s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001290s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000693s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000684s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001359s ]
  6. SELECT * FROM `set` [ RunTime:0.000990s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001494s ]
  8. SELECT * FROM `article` WHERE `id` = 542228 LIMIT 1 [ RunTime:0.007302s ]
  9. UPDATE `article` SET `lasttime` = 1779305588 WHERE `id` = 542228 [ RunTime:0.001761s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000609s ]
  11. SELECT * FROM `article` WHERE `id` < 542228 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001402s ]
  12. SELECT * FROM `article` WHERE `id` > 542228 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001206s ]
  13. SELECT * FROM `article` WHERE `id` < 542228 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.013151s ]
  14. SELECT * FROM `article` WHERE `id` < 542228 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.013110s ]
  15. SELECT * FROM `article` WHERE `id` < 542228 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007540s ]
0.222266s