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Updated: Jul 1, 2025

Establishment of an Extracellular Acidic pH Culture System
Published on: November 19, 2017
在瘤细胞周围极化严重的细胞外酸性
Qiang Feng1,2, Zachary Bennett1, Anthony Grichuk2,3
1Department of Biomedical Engineering, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, USA.
癌细胞通过输出质子和乳酸盐来创造高度酸性的微环境. 这种用光纳米探针检测到的局部酸度与单碳酸盐输送体表达和瘤中T细胞排除相关.
科学领域:
- 在瘤学瘤学.
- 生物化学 生物化学
- 纳米技术 纳米技术
背景情况:
- 细胞外pH值对细胞功能至关重要,并且受到严格调节.
- 瘤微环境往往由于癌细胞代谢和 poor perfusion 变得酸性.
- 了解瘤酸度是开发新癌症疗法的关键.
研究的目的:
- 研究瘤微环境中的空间分布和酸度的原因.
- 利用新的光pH纳米探针来检测局部酸性区域.
- 探索瘤酸度向癌症诊断和治疗的潜力.
主要方法:
- 开发和应用具有特定激活配置 (pH 5.3) 的光pH纳米探针.
- 基因操纵 (Knockout) 和单碳酸盐载体 (MCTs) 的药理抑制.
- 使用小鼠瘤模型的体内研究和对人类状细胞癌组织的体外分析.
主要成果:
- 癌细胞将离子分泌到小的细胞外区域,从而产生极化严重的酸度 (pH <5.3).
- 这种局部酸性主要是由通过MCT共同出口质子和乳酸盐驱动的.
- 活体分析显示了斑点酸化,MCT表达和人体瘤中细胞毒性T细胞排除之间的相关性.
结论:
- 严重偏离的瘤酸度是瘤微环境的一个明显特征.
- 单碳酸盐转运体在产生这种局部酸性方面发挥着至关重要的作用.
- 准或利用这种空间酸度为癌症诊断和治疗提供了一个有希望的途径.
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