23 February 2010Development of an integrated microsystem for the multiplexed detection of breast cancer markers in serum using electrochemical immunosensors
Alex Fragoso, Noemi Laboria, Mary Luz Botero, Diego Bejarano, Daniel Latta, Thomas E. Hansen-Hagge, Wolfgang Kemmner, Ioanis Katakis, Claudia Gärtner, Klaus Drese, Ciara K. O'Sullivan
Alex Fragoso,1 Noemi Laboria,1 Mary Luz Botero,1 Diego Bejarano,1 Daniel Latta,2 Thomas E. Hansen-Hagge,2 Wolfgang Kemmner,3 Ioanis Katakis,1 Claudia Gärtner,4 Klaus Drese,2 Ciara K. O'Sullivan1,5
1Univ. Rovira i Virgili (Spain) 2Institut für Mikrotechnik Mainz GmbH (Germany) 3Charité Universitätsmedizin Berlin (Germany) 4microfluidic ChipShop GmbH (Germany) 5Institució Catalana de Recerca i Estudis Avançats (Spain)
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A microsystem integrating electrochemical biosensoric detection for the simultaneous multiplexed detection of protein
markers of breast cancer is reported. The immobilization of antibodies against each of carcinoembryonic antigen (CEA),
prostate specific antigen (PSA) and cancer antigen 15-3 (CA15-3) was achieved via crosslinking to a bipodal dithiol
chemisorbed on gold electrodes. This bipodal dithiol had the double function of eliminating non-specific binding and
optimal spacing of the anchor antibodies for maximum accessibility to the target proteins. Storage conditions were
optimized, demonstrating a long-term stability of the reporter conjugates jointly stored within a single reservoir in the
microsystem. The final system has been optimized in terms of incubation times, temperatures and simultaneous,
multiplexed detection of the protein markers was achieved in less than 10 minutes with less than ng/mL detection limits.
The microsystem has been validated using real patient serum samples and excellent correlation with ELISA results
obtained.
Alex Fragoso,Noemi Laboria,Mary Luz Botero,Diego Bejarano,Daniel Latta,Thomas E. Hansen-Hagge,Wolfgang Kemmner,Ioanis Katakis,Claudia Gärtner,Klaus Drese, andCiara K. O'Sullivan
"Development of an integrated microsystem for the multiplexed detection of breast cancer markers in serum using electrochemical immunosensors", Proc. SPIE 7593, Microfluidics, BioMEMS, and Medical Microsystems VIII, 75930K (23 February 2010); https://doi.org/10.1117/12.857311
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Alex Fragoso, Noemi Laboria, Mary Luz Botero, Diego Bejarano, Daniel Latta, Thomas E. Hansen-Hagge, Wolfgang Kemmner, Ioanis Katakis, Claudia Gärtner, Klaus Drese, Ciara K. O'Sullivan, "Development of an integrated microsystem for the multiplexed detection of breast cancer markers in serum using electrochemical immunosensors," Proc. SPIE 7593, Microfluidics, BioMEMS, and Medical Microsystems VIII, 75930K (23 February 2010); https://doi.org/10.1117/12.857311