酸化卡拉基南的结构-活性关系:结肠直肠癌细胞中的分子修饰和抗癌活性
Ellen Cristina Miranda Lacerda1, Lucas de Freitas Pedrosa1, Francisco Felipe Bezerra2
1Department of Food Science and Experimental Nutrition, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, 05508-000, SP, Brazil; Food Research Center (FoRC), CEPID-FAPESP (Research, Innovation and Dissemination Centers, São Paulo Research Foundation), CEPIX-USP, São Paulo, 05508-080, SP, Brazil.
International journal of biological macromolecules
|December 24, 2025
概括
化学修饰的卡拉基南在结肠癌细胞上表现出抗癌作用. 特定的修改 (B-mod) 通过改变分子结构来增强这些效应,这表明了进一步发展的潜力.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 胡卜素,来自藻类的硫酸多糖,是食品添加剂.
- 化学修饰,特别是硫化,可以增强多糖的生物特性,包括抗癌作用.
- 了解卡拉基的结构-活性关系对于开发抗癌药物至关重要.
研究的目的:
- 通过酸水解来化学修改卡拉基南.
- 为了评估改性卡拉基南对结肠癌细胞的生物效应.
- 为了描述改性卡拉基南的分子结构.
主要方法:
- 酸性水解用于卡拉基南的修饰.
- HPSEC-RID用于分子量和多分散性分析.
- 细胞活力试验,增殖试验和细胞周期分析 (G1次阶段).
- 用于结构特征的FTIR和NMR.
主要成果:
- 改性卡拉基南降低了结肠癌细胞的活力和增殖,以一种特定于血统的方式.
- A-mod 和 B-mod 卡拉基南增加了p21 蛋白质水平,而这与p53.3无关.
- B-mod carrageenan 增加了 HCT116 细胞中的 sub-G1 阶段,表明了细胞亡.
- 结构分析揭示了修饰的原蛋白中特定的脱硫模式.
结论:
- 卡拉基南修饰改变了对结肠癌细胞的生物活性.
- 由于其结构特征,B-mod卡拉基南在体外表现出有前途的抗癌潜力.
- 为了更安全,更有效的治疗应用,需要进一步优化.
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