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@article{1311792,
author = {Heger, Zbynek and Zitka, Jan and Cernei, Natalia and Krizkova, Sona and Sztalmachová, Markéta and Kopel, Pavel and Masařík, Michal and Hodek, Petr and Zítka, Ondrej and Adam, Vojtech and Kizek, Rene},
article_location = {Hoboken},
article_number = {11-12},
doi = {http://dx.doi.org/10.1002/elps.201400559},
keywords = {Biosensor; Bioseparation; Head and neck cancer; Metallothionein; Nanotechnology},
language = {eng},
issn = {0173-0835},
journal = {Electrophoresis},
title = {3D-printed biosensor with poly(dimethylsiloxane) reservoir for magnetic separation and quantum dots-based immunolabeling of metallothionein},
volume = {36},
year = {2015}
}
TY - JOUR
ID - 1311792
AU - Heger, Zbynek - Zitka, Jan - Cernei, Natalia - Krizkova, Sona - Sztalmachová, Markéta - Kopel, Pavel - Masařík, Michal - Hodek, Petr - Zítka, Ondrej - Adam, Vojtech - Kizek, Rene
PY - 2015
TI - 3D-printed biosensor with poly(dimethylsiloxane) reservoir for magnetic separation and quantum dots-based immunolabeling of metallothionein
JF - Electrophoresis
VL - 36
IS - 11-12
SP - 1256-1264
EP - 1256-1264
PB - Wiley-Blackwell
SN - 01730835
KW - Biosensor
KW - Bioseparation
KW - Head and neck cancer
KW - Metallothionein
KW - Nanotechnology
N2 - Currently, metallothioneins (MTs) are extensively investigated as the molecular biomarkers and the significant positive association of the MT amount was observed in tumorous versus healthy tissue of various types of malignant tumors, including head and neck cancer. Thus, we proposed a biosensor with fluorescence detection, comprising paramagnetic nanoparticles (nanomaghemite core with gold nanoparticles containing shell) for the magnetic separation of MT, based on affinity of its sulfhydryl groups toward gold. Biosensor was crafted from PDMS combined with technology of 3D printing and contained reservoir with volume of 50 mu L linked to input (sample/detection components and washing/immunobuffer) and output (waste). For the immunolabeling of immobilized MT anti-MT antibodies conjugated to CdTe quantum dots through synthetic heptapeptide were employed. After optimization of fundamental conditions of the immunolabeling (120 min, 20 degrees C, and 1250 rpm) we performed it on a surface of paramagnetic nanoparticles in the biosensor reservoir, with evaluation of fluorescence of quantum dots (lambda(exc) 400 nm, and lambda(em) 555 nm). The developed biosensor was applied for quantification of MT in cell lines derived from spinocellular carcinoma (cell line 122P-N) and fibroblasts (122P-F) and levels of the biomarker were found to be about 90 nM in tumor cells and 37 nM in fibroblasts. The proposed system is able to work with low volumes (< 100 mu L), with low acquisition costs and high portability.
ER -
HEGER, Zbynek, Jan ZITKA, Natalia CERNEI, Sona KRIZKOVA, Markéta SZTALMACHOVÁ, Pavel KOPEL, Michal MASAŘÍK, Petr HODEK, Ondrej ZÍTKA, Vojtech ADAM and Rene KIZEK. 3D-printed biosensor with poly(dimethylsiloxane) reservoir for magnetic separation and quantum dots-based immunolabeling of metallothionein. \textit{Electrophoresis}. Hoboken: Wiley-Blackwell, 2015, vol.~36, 11-12, p.~1256-1264. ISSN~0173-0835. Available from: https://dx.doi.org/10.1002/elps.201400559.
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