Determination of Physiological Thiols by Electrochemical Detection with Piazselenole and Its Application in Rat Breast Cancer Cells 4T-1
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- 作者：Wei Wang ; Lin Li ; Shufeng Liu ; Cuiping Ma ; Shusheng Zhang
- 刊名：Journal of the American Chemical Society
- 出版年：2008
- 出版时间：August 20, 2008
- 年：2008
- 卷：130
- 期：33
- 页码：10846-10847
- 全文大小：134K
- 年卷期：v.130,no.33(August 20, 2008)
- ISSN：1520-5126
文摘
Glutathione (GSH), the most abundant cellular thiol, has been shown to play an important role in maintaining cellular redox equilibrium that is pivotal for cell growth and function. In the present paper a novel electrochemical probe of piazselenole containing a Se−N bond was well developed for the determination of GSH. The cyclic voltammogram of piazselenole scanned at 100 mV/s displayed an irreversible reduction peak at −0.106 V (vs Ag/AgCl electrode) and a significant peak current decrease could be further provoked with the addition of GSH into piazselenole solution. On the basis of the peak current decrease of piazselenole recorded by differential pulse voltammetry with the increase of GSH concentration, a working curve was constructed for GSH determination in the range of 5.0 × 10−10∼2.2 × 10−8 M with the linear regression equation as ΔiP (10−6A) = 0.0952 + 0.4287 × CGSH (10−8 M) and the detection limit (3σ) as 83 pM. The proposed method was satisfactorily applied to the extracts of rat breast cancer cells 4T-1 for intracellular thiols detection.