NDLI: Ultrasensitive detection of lead (II) based on fluorescent aptamer-functionalized carbon nanotubes.

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Ultrasensitive detection of lead (II) based on fluorescent aptamer-functionalized carbon nanotubes.

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Ultrasensitive detection of lead (II) based on fluorescent aptamer-functionalized carbon nanotubes.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Taghdisi, Seyed Mohammad Emrani, Somayeh Sarreshtehdar Tabrizian, Kaveh Ramezani, Mohammad Abnous, Khalil Emrani, Ahmad Sarreshtehdar
Description	Country affiliation: Iran Author Affiliation: Taghdisi SM ( Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.); Emrani SS ( School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.); Tabrizian K ( Department of Toxicology, School of Pharmacy, Zabol University of Medical Sciences, Zabol, Iran.); Ramezani M ( Nanotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.); Abnous K ( Pharmaceutical Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address: abnouskh@mums.ac.ir.); Emrani AS ( Cardiovascular Research Center, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address: ahmad_sarreshtedar@yahoo.com.)
Abstract	Lead contamination is a serious environmental problem with toxic effects in human. Here, we developed a simple and sensitive sensing method employing ATTO 647N/aptamer-SWNT ensemble for detection of Pb(2+). This method is based on the super quenching capability of single-walled carbon nanotubes (SWNTs), high affinity of the aptamer toward Pb(2+) and different propensities of ATTO 647N-aptamer and ATTO 647N-aptamer/Pb(2+) complex for adsorption on SWNTs. In the absence of Pb(2+), the fluorescence of ATTO 647N-aptamer is efficiently quenched by SWNTs. Upon addition of Pb(2+), the aptamer binds to its target, leading to the formation of a G-quadruplex/Pb(2+) complex and does not interact with SWNTs and ATTO 647N-aptamer starts fluorescing. This sensor exhibited a high selectivity toward Pb(2+) and a limit of detection (LOD) as low as 0.42 nM was obtained. Also this sensor could be applied for detection of Pb(2+) ions in tap water and biological sample like serum with high sensitivity.
File Format	HTM / HTML
ISSN	13826689
Issue Number	3
Volume Number	37
e-ISSN	18727077
Journal	Environmental Toxicology and Pharmacology
Language	English
Publisher	Elsevier
Publisher Date	2014-05-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Health Discipline Pharmacology Aptamers, Nucleotide Chemistry Environmental Pollutants Analysis Fluorescent Dyes Lead Nanotubes, Carbon Animals Drinking Water Blood Limit Of Detection Rats Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Medicine Toxicology Pharmacology

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