维生素B6由在生长过程中代谢酶的局部细分控制
Carolina N Franco1, Laurence J Seabrook2, Steven T Nguyen1
1Department of Pharmaceutical Sciences, School of Pharmacy & Pharmaceutical Sciences, University of California, Irvine, Irvine, CA, USA.
Science advances
|September 8, 2023
概括
维生素B6的含量由酶氧化酶 (PDXK) 和其进入溶酶体的运动来调节. 破坏这种途径会抑制结肠直肠癌细胞的生长.
科学领域:
- 生物化学 生化学
- 细胞生物学 细胞生物学
- 在瘤学瘤学.
背景情况:
- 维生素B6对健康至关重要,但其调节的理解很少.
- 不调节的维生素B6水平与各种疾病有关.
研究的目的:
- 为了研究维生素B6平衡的调节.
- 探索氧化酶 (PDXK) 在维生素B6代谢中的作用.
- 确定PDXK调节对结直肠癌 (CRC) 进展的影响.
主要方法:
- 研究了PDXK的亚细胞定位和调节.
- 使用了Wnt信号通路激活.
- 采用技术研究蛋白质通过溶解体降解,包括微自.
- 评估了PDXK-lysosome通路的药理和遗传破坏对CRC细胞和有机体的影响.
主要成果:
- 维生素B6合成中的速度限制酶PDXK被快速分离到溶酶体中.
- 通过甲基-氨酸Degron (MrDegron) 标签调解PDXK的溶解体向,通过微自促进降解.
- 过度活跃的PDXK的溶解体降解导致维生素B6缺乏.
- 这种缺陷促进了Wnt驱动的结直肠癌细胞的增殖.
- 破坏由MrDegron介导的降解途径会降低CRC细胞存活率和有机体生长.
结论:
- 将PDXK细分为溶酶体是调节维生素B6水平的关键机制.
- MrDegron-lysosome通路控制PDXK的稳定性,并影响维生素B6的稳定性.
- 通过利用维生素B6缺乏,针对这种途径为结直肠癌提供了潜在的治疗策略.
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