精子胺通过降低纤维素蛋白的调节来减弱TGF-β诱导的EMT
1The State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China.
The Journal of biological chemistry
|February 27, 2025
概括
转化生长因子-β (TGF-β) 降低了精子水平,促进了上皮-介质细胞过渡 (EMT). 添加精氨酸可以通过降低纤维素蛋白的调节来逆转EMT,为癌症转移提供了潜在的治疗标.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 表皮-介质细胞过渡 (EMT) 对于癌症的发展,修复和转移至关重要.
- 转化生长因子-β (TGF-β) 是EMT的关键诱导因子,调节基因表达和细胞变化.
- 细胞代谢在TGF-β诱导的EMT中的作用在很大程度上仍未被探索.
研究的目的:
- 为了研究TGF-β诱导的EMT期间早期代谢变化.
- 为了确定受TGF-β的影响的特定代谢途径.
- 探索在EMT中针对治疗干预的代谢变化的潜力.
主要方法:
- 在短暂的TGF-β刺激后,HaCaT细胞的代谢变化的表征.
- 细胞内聚胺水平的评估.
- 对外源性聚胺添加对EMT的影响的评估.
- 分析纤维素蛋白表达和细胞外信号调节激酶 (ERK) 信号传递.
主要成果:
- TGF-β刺激显著耗尽了细胞内聚胺池,特别是精子.
- 外源精氨酸,但不包括其他多氨酸,减弱的TGF-β诱导的EMT.
- 添加精子会导致纤维素蛋白的下调.
- TGF-β激活了ERK,增加了精氨酸氧化酶的表达,降低了精氨酸度.
结论:
- TGF-β诱导的EMT与聚胺代谢的改变有关,特别是精子胺的减少.
- 精子通过降低纤维素蛋白的调节,对EMT起着保护作用.
- 向聚胺代谢,特别是TGF-β-ERK-精子氧化酶轴,为抑制EMT和转移提供了一个新的治疗策略.
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