胆固醇肝炎引起的血管位变化促进黑色素瘤转移
Johannes Hoffmann1,2, Julia Schüler1,2, Bianca Dietsch1,2,3
1Department of Dermatology, Venereology and Allergology, University Medical Center and Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, Mannheim, 68167, Germany.
Cancer & metabolism
|January 28, 2025
概括
肝脏的早期变化.
科学领域:
- 肝病学和瘤学研究研究
- 癌症转移机制 癌症转移机制
- 代谢性肝病的发病原因 代谢性肝病的发病原因
背景情况:
- 恶性黑色素瘤肝转移显著影响患者的生存,需要新的治疗策略.
- 与代谢功能障碍相关的脂肪性肝病 (MASLD) 和脂肪性肝炎 (MASH) 的患病率越来越高,促使人们对它们对肝转移的影响进行调查.
- 在MASLD/MASH中肝脏侧鼻内皮细胞 (LSEC) 特定的变化可能会影响肝脏黑色素瘤转移.
研究的目的:
- 为了研究在MASLD/MASH发育期间LSEC特异性变化的影响肝脏黑色素瘤转移.
- 为了确定早期的血管位变化或已确定的肝硬化/纤维化是否会导致转移的增加.
- 探索肝血管利基中的潜在治疗点.
主要方法:
- 给小鼠提供饮食 (CDAA,HFD) 来诱导MASLD/MASH和肝纤维化的不同阶段.
- 黑色素瘤细胞系 (B16F10Luc2,Wt31) 用于评估转移的形成.
- 用LSEC特定的GATA4淘汰赛小鼠来区分纤维化与肥胖症的影响;使用RNA-Seq和抗体疗法 (ICAM1,VCAM1).
主要成果:
- 在纤维化发育之前,CDAA饮食食增加了转移,类似于Gata4LSEC-KO/BL小鼠的纤维化,但没有肥胖症.
- 肝血管利基的早期分子变化,包括LSEC脱差和粘附分子增加 (ICAM1,VCAM1),与转移相关.
- 抑制ICAM1,但不抑制VCAM1,减少黑色素瘤细胞保留,表明ICAM1在转移中的作用.
结论:
- 肝血管小穴在MASLD/MASH发育期间对短期的营养变化敏感,从而形成了转移前的小穴.
- 早期的血管适应,而不是已确定的肥胖症或纤维化,促进黑色素瘤转移.
- 准肝血管利基,特别是ICAM1,为MASLD/MASH. 肝转移提供了潜在的治疗策略.
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