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    Clickable cellulosic surfaces for peptide-based bioassays

    Year: 2019

    Journal: Talanta, Volume 205, DEC 1

    Authors: Odinolfi, Maria Teresa; Romanato, Alessandro; Bergamaschi, Greta; Strada, Alessandro; Sola, Laura; Girella, Alessandro; Milanese, Chiara; Chiari, Marcella; Gori, Alessandro; Cretich, Marina

    Organizations: Regione Lombardia, project READY (Regional Network for developing diagnostic methods in rapid response to emerging epidemics and bio-emergencies) [229472, 2015JTL4HL]

    Keywords: Click chemistry; Peptides; Microarrays; Immunodiagnostics; Cellulose; Paper based assays

    The use of peptides in paper-based analytics is a highly appealing field, yet it suffers from severe limitations. This is mostly due to the loss of effective target recognition properties of this relatively small probes upon nonspecific adsorption onto cellulose substrates. Here we address this issue by introducing a simple polymer-based strategy to obtain clickable cellulose surfaces, that we exploited for the chemoselective bioconjugation of peptide bioprobes. Our method largely outperformed standard adsorption-based immobilization strategy in a challenging, real case immunoassay, namely the diagnostic discrimination of Zika + individuals from healthy controls. Of note, the clickable polymeric coating not only allows efficient peptides bioconjugation, but it provides favorable anti-fouling properties to the cellulosic support. We envisage our strategy to broaden the repertoire of cellulosic materials manipulation and promote a renewed interest in peptide-based paper bioassays.
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