微泡
前列腺癌
外体
细胞外小泡
Zeta电位
癌细胞
化学
癌症
癌症研究
生物物理学
细胞生物学
纳米技术
生物
生物化学
纳米颗粒
医学
材料科学
小RNA
内科学
基因
作者
Takanori Akagı,Kenichi Kato,Nami Hanamura,Masashi Kobayashi,Takanori Ichikı
标识
DOI:10.7567/jjap.53.06jl01
摘要
Extracellular vesicles including exosomes have the potential to be used in therapeutic and diagnostic applications. Towards the noninvasive diagnosis of prostate cancer using urinary exosomes, technical challenges lie in developing precise methods of analyzing exosomes. Previously, we developed an on-chip microcapillary electrophoresis (µCE) system equipped with a laser dark-field microscope. The zeta potential of exosomes of cancer cells was found to be larger than that of normal cells. In this study, the zeta potential of exosomes of normal and cancer prostate cells was evaluated using this system after treating with sialidase. The large negative charge of cancer exosomes was found to be due to the large amount of sialic acids. These results suggest that an on-chip µCE system is useful for the accurate evaluation of events that occur on the exosome surfaces at the single-particle level and promising for the prescreening of prostate cancer exosomes without the need for labeling.
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