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  • Title: Label-free detection of Cu(II) in a human serum sample by using a prion protein-immobilized FET sensor.
    Author: Wustoni S, Hideshima S, Kuroiwa S, Nakanishi T, Mori Y, Osaka T.
    Journal: Analyst; 2015 Oct 07; 140(19):6485-8. PubMed ID: 26288852.
    Abstract:
    We have developed a field effect transistor (FET) sensor to sensitively detect copper ions (Cu(2+)) in a human serum (HS) sample for promising health-care diagnosis. By utilizing a Cu(2+)-binding prion protein that was immobilized on the FET gate surface, such an FET sensor can provide a simple, label free and highly selective performance, even in HS samples. We demonstrated the sensitivity of the sensor at the nanomolar level, 0-100 nM, which is very useful for the detection range of Cu(2+) deficiency in practical applications.
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