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Surface chemical characterization and shelf life studies of reference glycan microarrays using ToF-SIMS, XPS and fluorescence spectroscopy

  • Covalent modification of surfaces with carbohydrates (glycans) is a prerequisite for a variety of glycomics-based biomedical applications, including functional biomaterials, glycan-arrays, and glycan-based biosensors. The chemistry of glycan immobilization plays an essential role in the bioavailability and function of surface bound carbohydrate moieties. For biomedical applications the stability over time (shelf life) of a glycan-array is a crucial factor. Basic requirements for the production of microarrays are first of all stable signals without any loss of quality. Therefore, the investigation of the shelf life for carbohydrate microarrays is an important part in the development of glycan-arrays. Motivated by the need of reliable quality control for glycan microarrays, we developed reference arrays using fluorescent model glycans. Since the long term stability of glycan microarrays is a crucial factor for their clinical application the shelf life at different storage conditions ofCovalent modification of surfaces with carbohydrates (glycans) is a prerequisite for a variety of glycomics-based biomedical applications, including functional biomaterials, glycan-arrays, and glycan-based biosensors. The chemistry of glycan immobilization plays an essential role in the bioavailability and function of surface bound carbohydrate moieties. For biomedical applications the stability over time (shelf life) of a glycan-array is a crucial factor. Basic requirements for the production of microarrays are first of all stable signals without any loss of quality. Therefore, the investigation of the shelf life for carbohydrate microarrays is an important part in the development of glycan-arrays. Motivated by the need of reliable quality control for glycan microarrays, we developed reference arrays using fluorescent model glycans. Since the long term stability of glycan microarrays is a crucial factor for their clinical application the shelf life at different storage conditions of glycan microarrays was studied in detail using the two model glycan compounds. Herein, we present a shelf life study of model glycan microarrays on epoxy modified glass surfaces over a period of 320 days. This was carried out using different analyzing techniques such as Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS), X-ray Photoelectron Spectroscopy (XPS) and Fluorescence Spectroscopy. To analyze and interpret the ToF-SIMS dataset the multivariate technique principal component analysis (PCA) was used. The dependence of the array´s shelf life upon storage conditions was specifically studied.zeige mehrzeige weniger

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Metadaten
Autor*innen:Markus Holzweber
Koautor*innen:Carolin Nietzold, Paul Dietrich, Andreas Lippitz, A. Kamalakumar, S. Ivanov-Pankov, V. Blanchard, W. Weigel, Ulrich Panne, Wolfgang Unger
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2016
DDC-Klassifikation:Naturwissenschaften und Mathematik / Chemie / Analytische Chemie
Freie Schlagwörter:Fluorescence spectroscopy; Glycan microarray; SIMS; XPS
Veranstaltung:SIMS Europe 2016
Veranstaltungsort:Münster, Germany
Beginndatum der Veranstaltung:18.9.2016
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:05.10.2016
Referierte Publikation:Nein
Eingeladener Vortrag:Nein
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