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Reference type: Journal
Authors: Sharma PS, Lakshmi D, Prasad BB
Article Title: Molecularly imprinted solid-phase extraction combined with molecularly imprinted polymer-sensor: a diagnostic tool applicable to creatine deficiency syndrome.
Publication date: 2007
Journal: Biomedical Chromatography
Volume: 21
Issue: (9)
Page numbers: 976-986.
DOI: 10.1002/bmc.842

Abstract: Primary creatine deficiency syndromes (CDS) are a new group of disorders caused by guanidinoacetate methyltransferase (GAMT) deficiency, which affects endogenous creatine biosynthesis with depletion of body creatine. A deficiency in creatine can be corrected by treatment with oral creatine supplementation and this necessitates a simple and sensitive screening method for early detection of creatine in dilute physiologic fluids. In this work an artificial receptor, molecularly imprinted polymer (MIP), for creatine was used both as a material for solid-phase extraction (SPE) and as a sensing element in a voltammetric sensor. Using the combination of molecularly imprinted solid-phase extraction (MISPE) with a complementary MIP sensor, the minimum detectable amount was found to be 0.0015 ng mL-1 (RSD = 1.3%, S/N = 3). The MISPE-MIP sensor combination provided up to 60-fold preconcentration, which was more than sufficient for achieving the required quantification limit 50 ng mL-1 (or 0.0025 ng mL-1 after 2 104-fold dilution) for creatine in human blood serum. Copyright 2007 John Wiley & Sons, Ltd
Template and target information: creatine
Author keywords: molecularly imprinted polymer, creatine, Molecularly imprinted polymer-modified HMDE sensor, molecularly imprinted solid-phase extraction, Blood serum


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