当前位置:首页>青岛>青岛大学附属医院正畸科:靶向铁死亡:防治正畸牙根吸收的突破性视角

青岛大学附属医院正畸科:靶向铁死亡:防治正畸牙根吸收的突破性视角

  • 2026-03-03 13:56:44
青岛大学附属医院正畸科:靶向铁死亡:防治正畸牙根吸收的突破性视角
研究导读:本文由青岛大学附属医院正畸科于《Progress in OrthodonticsIF:5)上发表,主要探讨了NCOA4介导的铁蛋白自噬在正畸诱导的炎症性牙根吸收(OIIRR)中的作用及相关机制,并通过体内外实验验证了铁死亡抑制剂和NCOA4抑制剂对OIIRR的干预效果

图文结果解读

图1:Fer-1可预防小鼠 OIIRR 。A 小鼠 OIIRR 模型的建立。B 腹腔内Fer-1给药示意图。C 上颌第一磨牙Micro-CT图像的三维重建。蓝色区域为第一磨牙近中根。D 根部切片的苏木精-伊红(H&E)染色。E 根部切片的抗酒石酸酸性磷酸酶(TRAP)染色。F 根部压力侧牙周组织中IL- 1β 的免疫组化(IHC)染色。R:根;AB:牙槽骨;比例尺=50 μm 。Fer-1:铁调节蛋白-1;Con:对照组;CF: OIIRR 组;CF+Fer-1:Fer-1治疗组。
图2:CF与IL- 1β 可诱导人肺动脉内皮细胞(hPDLCs)发生铁死亡。A 经0、6、12及24小时CF处理的hPDLCs中GPX4蛋白表达情况。B 不同处理条件下24小时hPDLCs中GPX4蛋白水平。C 不同处理条件下hPDLCs细胞内活性氧(ROS)水平。D 通过 JC -1染色(聚集体/单体荧光比值)定量线粒体膜电位。E 不同处理条件下hPDLCs细胞内 Fe² ⁺水平。F 不同处理条件下hPDLCs中丙二醛(MDA)水平。
图3:Fer-1在CF和IL- 1β 刺激下抑制人肺动脉内皮细胞(hPDLCs)的铁死亡。A各处理组hPDLCs中GPX4蛋白表达的Westernblot分析。BFer-1处理后hPDLCs细胞内 Fe² +水平。CFer-1处理后hPDLCs中MDA水平。DFer-1处理后hPDLCs中ROS水平。比例尺=100 μm 。Fer-1,Ferrostatin-1。
图4:CF与IL- 1β 刺激诱导人肺动脉内皮细胞(hPDLCs)发生铁蛋白自噬。A组:对经压缩力处理0、3、6、12及24小时的hPDLCs进行NCOA4与FTH1表达的Western blot分析。B组:压缩力作用下NCOA4与FTH1的时序表达趋势。C组:经压缩力处理0、3、6、12及24小时的hPDLCs中p62与LC3表达的Western blot分析。D组:经压缩力处理0、3、6、12及24小时的hPDLCs细胞内铁水平。E组:NCOA4表达的代表性免疫荧光图像。F组:不同处理条件下24小时hPDLCs中NCOA4与FTH1的蛋白水平。G组:hPDLCs中LC3(绿色)与FTH1(红色)的免疫荧光分析
图5:NCOA4/FTH1介导的铁蛋白自噬在CF和IL- 1β 刺激下促进人肺动脉内皮细胞(hPDLCs)铁死亡。A NCOA4敲低后NCOA4的mRNA表达水平。B NCOA4敲低后,经CF和IL- 1β 刺激24小时的hPDLCs中NCOA4和FTH1的蛋白表达水平。C 各组的活性氧(ROS)水平。D 各组的细胞内 Fe² ⁺水平。E 通过 JC -1染色(聚集体/单体荧光比值)定量线粒体膜电位。F 各组的丙二醛(MDA)水平。
图6:9a抑制CD与IL- 1β 刺激下hPDLCs中铁蛋白自噬介导的铁死亡。A通过 CCK -8法评估hPDLCs细胞活力。B共处理化合物9a、CF和IL- 1β 24小时后hPDLCs中NCOA4、FTH1和GPX4蛋白表达的Western blot分析。C各组ROS水平。D各组细胞内 Fe² ⁺水平。E通过 JC -1染色(聚集体/单体荧光比)定量线粒体膜电位。F各组MDA水平。
图7:Fer-1抑制铁蛋白自噬介导的小鼠铁死亡 OIIRR 。A–E小鼠牙根免疫组化染色及GPX4、NCOA4、FTH1和LC3相对表达量。F根部压力侧代表性免疫组化图像。R:根部;AB:牙槽骨;比例尺=50 μm 。Fer-1:铁调节蛋白-1;Con:对照组;CF: OIIRR 组;F+Fer-1:Fer-1处理组

研究结论

综上所述,本研究阐明了NCOA4/FTH1介导的铁蛋白自噬与铁死亡在 OIIRR 发病机制中的潜在作用。NCOA4介导的铁蛋白自噬在体外实验中促进人PDLCs的铁死亡,从而加剧 OIIRR 。铁死亡抑制剂Fer-1在体外实验中有效减弱了人PDLCs的铁死亡,并在体内显著缓解 OIIRR 。此外,化合物9a直接靶向NCOA4,破坏NCOA4/FTH1相互作用,从而抑制铁蛋白自噬并减少人PDLCs的铁死亡。这些发现表明,进一步开发特异性靶向NCOA4/FTH1轴的治疗药物,可能为治疗 OIIRR 提供一种更具前景且更精准的策略。
#牙周炎#口腔科#口腔科医生#口腔科科研#牙周病科#口腔医院
Liyan Liu的文《Inhibition of NCOA4/FTH1-mediated ferritinophagy attenuates ferroptosis in PDLCs and alleviates orthodontically induced inflammatory root resorption》(2025年),因客观原因未能与权利人取得联系。本平台出于学术交流目的引用,无意侵犯原作者权益。如权利人认为不妥,请及时联系公众号后台,我们将立即删除或协商解决。
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  1. CONNECT:[ UseTime:0.000931s ] mysql:host=127.0.0.1;port=3306;dbname=g460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000597s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000306s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000373s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000503s ]
  6. SELECT * FROM `set` [ RunTime:0.000229s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000571s ]
  8. SELECT * FROM `article` WHERE `id` = 459860 LIMIT 1 [ RunTime:0.000441s ]
  9. UPDATE `article` SET `lasttime` = 1772633877 WHERE `id` = 459860 [ RunTime:0.006961s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000255s ]
  11. SELECT * FROM `article` WHERE `id` < 459860 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000402s ]
  12. SELECT * FROM `article` WHERE `id` > 459860 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000349s ]
  13. SELECT * FROM `article` WHERE `id` < 459860 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000577s ]
  14. SELECT * FROM `article` WHERE `id` < 459860 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000648s ]
  15. SELECT * FROM `article` WHERE `id` < 459860 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003263s ]
0.159844s