瘤代谢的分子成像:基于pyruvate和葡萄糖的乳MRI研究的洞察力
Elton T Montrazi1, Keren Sasson2, Lilach Agemy2
1Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, Israel.
Science advances
|March 13, 2024
概括
使用脱葡萄糖的代谢MRI显示了瘤内的清晰的乳酸信号,与pyruvate不同. 这突出了葡萄糖作为通过MRI追踪癌症代谢的优越标记物.
科学领域:
- 生物医学成像技术 生物医学成像技术
- 在瘤学瘤学.
- 代谢工程是代谢工程.
背景情况:
- 代谢性MRI的目的是通过追踪糖溶性前体,如酸盐和葡萄糖来检测癌症.
- 在体内转化为乳酸是癌症检测的关键代谢途径.
研究的目的:
- 在胰腺癌模型中,比较酸和葡萄糖作为代谢MRI的标记物的实用性.
- 评估这些代谢物的体内转化为乳酸和它们在瘤中的局部化.
主要方法:
- 在胰腺癌模型中使用HMRI来追踪外源注射的[3,3',3′′-2H3]-pyruvate和[6,6'-2H2]-glucose的命运.
- 交替注射乳糖和非乳糖葡萄糖,以评估葡萄糖的可用性和消耗量.
- 监测了酸乳酸信号的时间动态和空间定位.
主要成果:
- 脱酸产生了一种短暂的乳酸盐信号,并具有轻微的瘤边缘局部化.
- [6,6'-2H2]-葡萄糖产生了乳酸信号,该信号在瘤内明显局部化,持续超过一个小时.
- 葡萄糖注射与乳酸生成相关,表明由华堡效应驱动的持续葡萄糖消耗.
结论:
- 由于持续的局部乳酸生产,脱葡萄糖是胰腺癌代谢MRI的比pyruvate更有效的标记物.
- 酸盐的短暂信号受到传送器和动力效应的影响,限制了它的效用.
- 研究结果支持使用基于葡萄糖的标记物用于癌症检测中的强大的代谢MRI.
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