Detection of single-molecule H2O2 signalling from epidermal growth factor receptor using fluorescent single-walled carbon nanotubes.

Detection of single-molecule H2O2 signalling from epidermal growth factor receptor using fluorescent single-walled carbon nanotubes.
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DOI:
10.1038/nnano.2010.24
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发表时间:
2010-04
影响因子:
38.3
通讯作者:
Strano MS
Strano MS
中科院分区:
材料科学1区
文献类型:
--
作者:
Jin H;Heller DA;Kalbacova M;Kim JH;Zhang J;Boghossian AA;Maheshri N;Strano MS

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在细胞信号传导中,一个新兴的概念是活性氧的天然作用,如过氧化氢(H2O2),在氧化还原信号通路中作为有益的信使。尽管有越来越多的证据,但在低浓度的生命系统中,很难在空间和时间上追踪H2O2信号的性质。在这里,我们开发了一种荧光单壁碳纳米管阵列,可以选择性地实时记录在表皮生长因子(EGF)刺激下单个人表皮癌细胞释放H2O2分子时发生的离散、随机猝灭事件。我们在数学上表明,这种阵列可以区分细胞膜上局部产生的分子和其他贡献的分子。我们发现EGF在50分钟的时间内局部诱导2nmol H2O2。该平台有望提供一种在细胞水平上理解活性氧信号的新方法。
An emerging concept in cell signaling is the natural role of reactive oxygen species, such as hydrogen peroxide (H2O2), as beneficial messengers in redox signaling pathways. Despite growing evidence, the nature of H2O2 signaling is confounded by difficulties in tracking it in living systems both spatially and temporally at low concentrations. Here we develop an array of fluorescent single-walled carbon nanotubes that can selectively record in real time the discrete, stochastic quenching events that occur as H2O2 molecules are emitted from individual human epidermal carcinoma cells that are stimulated by epidermal growth factor (EGF). We show mathematically that such arrays can distinguish between molecules originating locally on the cell membrane from other contributions. We find that EGF induces 2 nmol H2O2 locally over a period of 50 min. This platform promises a new approach to understanding the signaling of reactive oxygen species at the cellular level.
DOI: 10.1002/j.1460-2075.1989.tb03393.x
发表时间: 1989-02-01
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