中文概述:一种芯片大小的器件可以将细胞表达的蛋白质快速传递到质谱仪,为早期阶段的癌症提供定量的数据信息。
由于在信号传导期间细胞产生的许多蛋白质是瞬时的,并且存在的数量太少,因此并不能被典型的分析仪器检测到。美国布莱克斯堡弗吉尼亚理工大学Iulia Lazar及其研究者开发了一种微流控系统,通过将保存在高容量室中的细胞暴露于横向流动的刺激试剂中,以改善对这些生物分子的捕获效果。与沿着样品室纵向递送试剂的系统相比,这种装置完成了更快也更准确的细胞蛋白质含量质谱分析。在乳腺癌细胞的实验中,研究团队在细胞暴露于有丝分裂触发物质后的几分钟内,就能识别出数百种参与生长和分裂过程的蛋白质。
Summary:Chip-scale devices that quickly deliver proteins expressed by cells to mass spectrometers may bring quantitative insights into the early stages of cancer. Many proteins generated by cells during signaling events are transient and present in numbers too small to be detected by typical analytical instruments. Iulia Lazar and colleagues from Virginia Tech in Blacksburg, United States have developed a microfluidic system that improves the capture of these biomolecules by exposing cells, held in high-capacity chambers, to a crosswise flow of stimulating agents. This setup yielded faster and more accurate mass spectrometry analysis of the cellular protein content than the systems that delivered agents lengthwise along the sample chambers. Experiments with breast cancer cells enabled the team to identify hundreds of proteins involved in growth and division processes in the few minutes following exposure to mitosis-triggering substances.
Related paper: Microfluidic reactors for advancing the MS analysis of fast biological responses
Microsystems & Nanoengineering 5, Article number: 7 (2019)
doi:10.1038/s41378-019-0048-3
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