TGFβ2-驱动的费里丁降解和随后的费洛死是绝经后症状的唾液腺功能障碍的基础
Su-Jeong Oh1,2,3, Ye Young Shin1,4, Ji-Su Ahn1
1Department of Oral Biochemistry, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, 50612, Republic of Korea.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|October 31, 2024
概括
绝经后口腔干燥与细胞死亡途径铁亡有关. 通过铁灭抑制剂准这种途径可以改善唾液腺功能并治疗异口症.
科学领域:
- 细胞生物学 细胞生物学
- 内分泌学 在内分泌学.
- 病理学 病理学 病理学
背景情况:
- 绝经后异口症 (口腔干燥) 影响许多女性,但其原因尚未完全理解.
- 唾液腺功能障碍是绝经后妇女的一个关键问题,需要进一步调查潜在机制.
研究的目的:
- 为了研究铁死在绝经后唾液腺功能障碍中的作用.
- 探索TGFβ信号传递和唾液腺中的铁亡之间的联系.
- 为了确定更年期后异位症的潜在治疗点.
主要方法:
- 利用卵巢切除 (OVX) 鼠标模型来模拟绝经后的情况.
- 分析了TGFβ信号通路的激活和TGFβ2在唾液腺中的表达.
- 在唾液腺有机体 (SGOs) 中通过TGFβ2治疗研究了铁灭菌诱导.
- 研究了III型TGFβ受体 (TβRIII) 在TGFβ2诱导的铁亡中的作用.
- 给OVX小鼠使用铁灭抑制剂利普罗克斯他-1 (Lip-1).
主要成果:
- OVX小鼠在唾液腺中表现出增强的TGFβ信号和异常的TGFβ2表达.
- TGFβ2治疗降低了费里丁,诱导了脂质过氧化,并在SGOs中引起了ferroptotic死亡.
- TGFβ2促进了ferritinophagy,这是一个由自介导的费里降解过程.
- 在OVX和TGFβ2治疗的唾液腺中观察到TβRIII过度表达;TβRIII沉默保护的SGO.
- 在OVX小鼠中,Lip-1治疗改善了唾液分泌.
结论:
- 铁亡是导致绝经后妇女唾液腺功能障碍的关键机制.
- 该TGFβ信号通路,特别是TGFβ2,通过ferritinophagy促进唾液腺中的ferroptosis.
- TβRIII在调解TGFβ2诱导的唾液腺损伤方面发挥着重要作用.
- 向铁亡是一种有前途的治疗策略,用于绝经后异位症.
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