DNA aptamer-based approaches for detection of multiple prostate cancer biomarkers

P. Jolly, N. Formisano, S. Djahanbakhsh Rafiee, N. Bhalla, A. Miodek, R. Dondi, D. K. Yang, L.C. Chen, P. Kasak, J. Tkac, M. D. Lloyd, I. M. Eggleston, P. Estrela

Research output: Contribution to conferencePoster

Abstract

Prostate cancer (PCa) is the most common malignancy in men worldwide. The need for its early diagnosis with a high sensitivity and accuracy to preclude worsening of PCa has led to increasing work on the detection of multiple biomarkers for PCa. One approach relies on the use of DNA aptamers raised against a range of PCa biomarkers. DNA aptamers, which bind with high affinity and specificity to target markers, are promising synthetic biorecognition molecules that can be used for the development of multiplexed biosensors. DNA aptamers have a number of advantages over antibodies, in particular with regards to their lower cost, easy manipulation and potential for controlled chemical attachment to electrodes.
We report on the development of novel techniques to detect different biomarkers for PCa using aptamers. In this study various detection methods are being investigated, namely electrochemical impedance spectroscopy, amperometry and localized surface plasmon resonance techniques (LSPR). Novel surface modification strategies are also being developed, e.g. impedimetric detection of prostate specific antigen (PSA) with aptamers together with a thiol-terminated sulfo-betaine, which may allow detection of PSA levels down to 1 ng/mL. The sulfo-betaine derivative also prevents any significant non-specific binding of control proteins such as human serum albumin. Additionally, in order to increase the sensitivity of our PSA aptasensor, a novel approach is being developed where a PSA-binding peptide conjugated with gold nanoparticles is used in conjunction with a DNA aptamer to perform a sandwich assay using the LSPR technique. As part of the search for enhanced PCa diagnosis, the detection of the biomarker α-methylacyl-CoA racemase (AMACR; P504S) is also being investigated using DNA aptamers. AMACR levels are consistently increased in early PCa, and antibody staining of biopsy samples is currently used for diagnosis. The best aptamer sequence for an on-surface detection of the AMACR protein has been identified using surface plasmon resonance (SPR) and impedance spectroscopy techniques.
The studies undertaken demonstrate the potential use of DNA aptamers for the development of a range of multiplexed detection platforms for early and accurate PCa diagnosis.
Original languageEnglish
Publication statusUnpublished - 2014
Event22nd Meeting of the EAU Section of Urological Research (ESUR), 2014 - Glasgow, UK United Kingdom
Duration: 9 Oct 201411 Oct 2014

Conference

Conference22nd Meeting of the EAU Section of Urological Research (ESUR), 2014
CountryUK United Kingdom
CityGlasgow
Period9/10/1411/10/14

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Nucleotide Aptamers
Tumor Biomarkers
Prostate-Specific Antigen
Surface plasmon resonance
Biomarkers
Betaine
Antibodies
Biopsy
Electrochemical impedance spectroscopy
Sulfhydryl Compounds
Biosensors
Serum Albumin
Gold
Surface treatment
Assays
Proteins
Spectroscopy
Nanoparticles
Derivatives
Peptides

Cite this

Jolly, P., Formisano, N., Djahanbakhsh Rafiee, S., Bhalla, N., Miodek, A., Dondi, R., ... Estrela, P. (2014). DNA aptamer-based approaches for detection of multiple prostate cancer biomarkers. Poster session presented at 22nd Meeting of the EAU Section of Urological Research (ESUR), 2014, Glasgow, UK United Kingdom.

DNA aptamer-based approaches for detection of multiple prostate cancer biomarkers. / Jolly, P.; Formisano, N.; Djahanbakhsh Rafiee, S.; Bhalla, N.; Miodek, A.; Dondi, R.; Yang, D. K.; Chen, L.C.; Kasak, P.; Tkac, J.; Lloyd, M. D.; Eggleston, I. M.; Estrela, P.

2014. Poster session presented at 22nd Meeting of the EAU Section of Urological Research (ESUR), 2014, Glasgow, UK United Kingdom.

Research output: Contribution to conferencePoster

Jolly, P, Formisano, N, Djahanbakhsh Rafiee, S, Bhalla, N, Miodek, A, Dondi, R, Yang, DK, Chen, LC, Kasak, P, Tkac, J, Lloyd, MD, Eggleston, IM & Estrela, P 2014, 'DNA aptamer-based approaches for detection of multiple prostate cancer biomarkers' 22nd Meeting of the EAU Section of Urological Research (ESUR), 2014, Glasgow, UK United Kingdom, 9/10/14 - 11/10/14, .
Jolly P, Formisano N, Djahanbakhsh Rafiee S, Bhalla N, Miodek A, Dondi R et al. DNA aptamer-based approaches for detection of multiple prostate cancer biomarkers. 2014. Poster session presented at 22nd Meeting of the EAU Section of Urological Research (ESUR), 2014, Glasgow, UK United Kingdom.
Jolly, P. ; Formisano, N. ; Djahanbakhsh Rafiee, S. ; Bhalla, N. ; Miodek, A. ; Dondi, R. ; Yang, D. K. ; Chen, L.C. ; Kasak, P. ; Tkac, J. ; Lloyd, M. D. ; Eggleston, I. M. ; Estrela, P. / DNA aptamer-based approaches for detection of multiple prostate cancer biomarkers. Poster session presented at 22nd Meeting of the EAU Section of Urological Research (ESUR), 2014, Glasgow, UK United Kingdom.
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abstract = "Prostate cancer (PCa) is the most common malignancy in men worldwide. The need for its early diagnosis with a high sensitivity and accuracy to preclude worsening of PCa has led to increasing work on the detection of multiple biomarkers for PCa. One approach relies on the use of DNA aptamers raised against a range of PCa biomarkers. DNA aptamers, which bind with high affinity and specificity to target markers, are promising synthetic biorecognition molecules that can be used for the development of multiplexed biosensors. DNA aptamers have a number of advantages over antibodies, in particular with regards to their lower cost, easy manipulation and potential for controlled chemical attachment to electrodes.We report on the development of novel techniques to detect different biomarkers for PCa using aptamers. In this study various detection methods are being investigated, namely electrochemical impedance spectroscopy, amperometry and localized surface plasmon resonance techniques (LSPR). Novel surface modification strategies are also being developed, e.g. impedimetric detection of prostate specific antigen (PSA) with aptamers together with a thiol-terminated sulfo-betaine, which may allow detection of PSA levels down to 1 ng/mL. The sulfo-betaine derivative also prevents any significant non-specific binding of control proteins such as human serum albumin. Additionally, in order to increase the sensitivity of our PSA aptasensor, a novel approach is being developed where a PSA-binding peptide conjugated with gold nanoparticles is used in conjunction with a DNA aptamer to perform a sandwich assay using the LSPR technique. As part of the search for enhanced PCa diagnosis, the detection of the biomarker α-methylacyl-CoA racemase (AMACR; P504S) is also being investigated using DNA aptamers. AMACR levels are consistently increased in early PCa, and antibody staining of biopsy samples is currently used for diagnosis. The best aptamer sequence for an on-surface detection of the AMACR protein has been identified using surface plasmon resonance (SPR) and impedance spectroscopy techniques. The studies undertaken demonstrate the potential use of DNA aptamers for the development of a range of multiplexed detection platforms for early and accurate PCa diagnosis.",
author = "P. Jolly and N. Formisano and {Djahanbakhsh Rafiee}, S. and N. Bhalla and A. Miodek and R. Dondi and Yang, {D. K.} and L.C. Chen and P. Kasak and J. Tkac and Lloyd, {M. D.} and Eggleston, {I. M.} and P. Estrela",
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T1 - DNA aptamer-based approaches for detection of multiple prostate cancer biomarkers

AU - Jolly, P.

AU - Formisano, N.

AU - Djahanbakhsh Rafiee, S.

AU - Bhalla, N.

AU - Miodek, A.

AU - Dondi, R.

AU - Yang, D. K.

AU - Chen, L.C.

AU - Kasak, P.

AU - Tkac, J.

AU - Lloyd, M. D.

AU - Eggleston, I. M.

AU - Estrela, P.

PY - 2014

Y1 - 2014

N2 - Prostate cancer (PCa) is the most common malignancy in men worldwide. The need for its early diagnosis with a high sensitivity and accuracy to preclude worsening of PCa has led to increasing work on the detection of multiple biomarkers for PCa. One approach relies on the use of DNA aptamers raised against a range of PCa biomarkers. DNA aptamers, which bind with high affinity and specificity to target markers, are promising synthetic biorecognition molecules that can be used for the development of multiplexed biosensors. DNA aptamers have a number of advantages over antibodies, in particular with regards to their lower cost, easy manipulation and potential for controlled chemical attachment to electrodes.We report on the development of novel techniques to detect different biomarkers for PCa using aptamers. In this study various detection methods are being investigated, namely electrochemical impedance spectroscopy, amperometry and localized surface plasmon resonance techniques (LSPR). Novel surface modification strategies are also being developed, e.g. impedimetric detection of prostate specific antigen (PSA) with aptamers together with a thiol-terminated sulfo-betaine, which may allow detection of PSA levels down to 1 ng/mL. The sulfo-betaine derivative also prevents any significant non-specific binding of control proteins such as human serum albumin. Additionally, in order to increase the sensitivity of our PSA aptasensor, a novel approach is being developed where a PSA-binding peptide conjugated with gold nanoparticles is used in conjunction with a DNA aptamer to perform a sandwich assay using the LSPR technique. As part of the search for enhanced PCa diagnosis, the detection of the biomarker α-methylacyl-CoA racemase (AMACR; P504S) is also being investigated using DNA aptamers. AMACR levels are consistently increased in early PCa, and antibody staining of biopsy samples is currently used for diagnosis. The best aptamer sequence for an on-surface detection of the AMACR protein has been identified using surface plasmon resonance (SPR) and impedance spectroscopy techniques. The studies undertaken demonstrate the potential use of DNA aptamers for the development of a range of multiplexed detection platforms for early and accurate PCa diagnosis.

AB - Prostate cancer (PCa) is the most common malignancy in men worldwide. The need for its early diagnosis with a high sensitivity and accuracy to preclude worsening of PCa has led to increasing work on the detection of multiple biomarkers for PCa. One approach relies on the use of DNA aptamers raised against a range of PCa biomarkers. DNA aptamers, which bind with high affinity and specificity to target markers, are promising synthetic biorecognition molecules that can be used for the development of multiplexed biosensors. DNA aptamers have a number of advantages over antibodies, in particular with regards to their lower cost, easy manipulation and potential for controlled chemical attachment to electrodes.We report on the development of novel techniques to detect different biomarkers for PCa using aptamers. In this study various detection methods are being investigated, namely electrochemical impedance spectroscopy, amperometry and localized surface plasmon resonance techniques (LSPR). Novel surface modification strategies are also being developed, e.g. impedimetric detection of prostate specific antigen (PSA) with aptamers together with a thiol-terminated sulfo-betaine, which may allow detection of PSA levels down to 1 ng/mL. The sulfo-betaine derivative also prevents any significant non-specific binding of control proteins such as human serum albumin. Additionally, in order to increase the sensitivity of our PSA aptasensor, a novel approach is being developed where a PSA-binding peptide conjugated with gold nanoparticles is used in conjunction with a DNA aptamer to perform a sandwich assay using the LSPR technique. As part of the search for enhanced PCa diagnosis, the detection of the biomarker α-methylacyl-CoA racemase (AMACR; P504S) is also being investigated using DNA aptamers. AMACR levels are consistently increased in early PCa, and antibody staining of biopsy samples is currently used for diagnosis. The best aptamer sequence for an on-surface detection of the AMACR protein has been identified using surface plasmon resonance (SPR) and impedance spectroscopy techniques. The studies undertaken demonstrate the potential use of DNA aptamers for the development of a range of multiplexed detection platforms for early and accurate PCa diagnosis.

UR - http://esur2014.uroweb.org/

M3 - Poster

ER -