期刊
BIOSENSORS & BIOELECTRONICS
卷 25, 期 1, 页码 22-27出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2009.05.036
关键词
Nanoneedle; AFM; Single cell; FRET; Caspase-3 activity; MOMENT
类别
资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- Research and Development in a New Converting Field Based on Nanotechnology and Materials Sciences to JM [19770163]
A method to detect an enzymatic reaction in a single living cell using an atomic force microscope equipped with an ultra-thin needle (a nanoneedle) and a fluorescent probe molecule was developed. The nanoneedle enables the low-invasive delivery of molecules attached onto its surface directly into a single cell. We hypothesized that an enzymatic reaction in a cell could be profiled by monitoring a probe immobilized on a nanoneedle introduced into the cell. In this study, a new probe substrate (NHGcas546) for caspase-3 activity based on fluorescent resonance energy transfer (FRET) was constructed and fixed on a nanoneedle. The NHGcas546-modified nanoneedle was inserted into apoptotic cells, in which caspase-3 is activated after apoptosis induction, and a change in the emission spectrum of the immobilized probe could be observed on the surface of the nanoneedle. Thus, we have developed a successful practical method for detecting a biological phenomenon in a single cell. We call the method MOlecular MEter with Nanoneedle Technology (MOMENT). (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据