Special Issue "Enzymatic Biosensors"
Deadline for manuscript submissions: closed (31 January 2013)
Dr. Jan Halámek
Department of Chemistry and Biomolecular Science, 214 Science Center, Clarkson University, Potsdam, NY 13699-5810, USA
Phone: +1 315 268 2354 (ext. 2370)
Fax: +1 315 268 6610
Interests: enzymatic sensors; affinity sensors; bioelectronics; bionanotechnology; biosensors; bioelectrochemistry
The glucose biosensor, a device that changed the lives of millions affected by diabetes, is a one remarkable example of enzyme-based biosensor technology. Enzyme sensors are a major part of biosensorics - technology, which currently represents a mature analogue to instrumental analytical techniques in areas of clinical diagnostics and is the leading technology in point-of-care analysis.
Enzyme biosensors employ the affinity and selectivity of catalytically active proteins, towards their target molecules. Typically, (enzyme,usually immobilized on/within the surface of transducer - acts as a catalyst when interacting with the analyte, represented by its substrate, inhibitor, co-substrate or co-factor, while the enzyme itself remains unchanged. The transducer converts the effect created by the interaction of enzyme with the analyte, usually into an electrical signal. Depending on the assay type, two fundamental classes of enzyme sensors can be distinguished. First, the enzyme detects the presence of a substrate, or co-substrate/co-factor. This is then, by way of a transducer, used to monitor the increase of enzymatic activity. A typical example is a glucose biosensor. The second group is based on the detection of inhibitors in the presence of a substrate. With this system the decrease of signal (caused by enzyme inhibition) is monitored. The most common example of this approach is the detection of organophosphate compounds used as pesticides or warfare nerve agents. The mode of signal transduction can be electrochemical, optical, resonant (acoustic), thermal etc. The major advantage of all of these approaches is the high sensitivity and specificity of the biorecognition of a single selected analyte.
There have been significant improvements in the field of enzymatic biosensors; the usage of new, genetically engineered enzymes has allowed for improved performance characteristics of current biosensors for the detection of established analytes (glucose, pesticides etc….). Advancement has been the utilization of genetically modified enzymes to detect novel markers. An additional group of improvements is the usage of “non-traditional” transducer materials, e.g. carbon nanotubes (CNT), or different conductive polymers. Remarkable structural and electrical property advancements have enabled new options mainly in the area of electrochemical sensing technologies.
Developments are not always based on novel materials, but also on new, original approaches. One example, of such an innovation is the recently emerging field of biomolecular computing (Biocomputing). This is where enzymatic sensing systems are used to perform various computing operations that mimic processes typical of electronic computing devices. Such approaches, with their sophisticated biomolecular design, have resulted in reversible, reconfigurable, and resettable “bio-logic” sensing architectures (gates) for processing chemical information. This is especially useful in enzymatic biosensor applications where, until now, the use of biosensor or bioassay arrays have been required for a simultaneous analysis of several different species
The technology of enzymatic biosensors offers a potent combination of performance and analytical features not available in any other bioanalytical system. The listing of just a few options in this overview can encourage future development, which could yield new generations of enzymatic biosensors for a wide range of applications in clinical, environmental or industrial diagnostics.
Dr. Jan Halámek
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. Papers will be published continuously (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
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Article: Catalytic and Inhibitory Kinetic Behavior of Horseradish Peroxidase on the Electrode Surface
Sensors 2012, 12(11), 14556-14569; doi:10.3390/s121114556
Received: 2 August 2012; in revised form: 29 August 2012 / Accepted: 17 September 2012 / Published: 29 October 2012| Download PDF Full-text (480 KB) | Download XML Full-text
Article: Indirect Determination of Mercury Ion by Inhibition of a Glucose Biosensor Based on ZnO Nanorods
Sensors 2012, 12(11), 15063-15077; doi:10.3390/s121115063
Received: 7 September 2012; in revised form: 17 October 2012 / Accepted: 2 November 2012 / Published: 6 November 2012| Download PDF Full-text (707 KB) | Download XML Full-text
Article: Nanobiosensors Based on Chemically Modified AFM Probes: A Useful Tool for Metsulfuron-Methyl Detection
Sensors 2013, 13(2), 1477-1489; doi:10.3390/s130201477
Received: 20 November 2012; in revised form: 6 January 2013 / Accepted: 6 January 2013 / Published: 24 January 2013| Download PDF Full-text (931 KB) | Download XML Full-text
Article: DNA-Based Sensor for Real-Time Measurement of the Enzymatic Activity of Human Topoisomerase I
Sensors 2013, 13(4), 4017-4028; doi:10.3390/s130404017
Received: 1 February 2013; in revised form: 16 February 2013 / Accepted: 19 March 2013 / Published: 25 March 2013| Download PDF Full-text (293 KB) | Download XML Full-text | Supplementary Files
Article: Internal Calibration Förster Resonance Energy Transfer Assay: A Real-Time Approach for Determining Protease Kinetics
Sensors 2013, 13(4), 4553-4570; doi:10.3390/s130404553
Received: 18 February 2013; in revised form: 11 March 2013 / Accepted: 25 March 2013 / Published: 8 April 2013| Download PDF Full-text (880 KB) | Download XML Full-text
Review: Immobilization Techniques in the Fabrication of Nanomaterial-Based Electrochemical Biosensors: A Review
Sensors 2013, 13(4), 4811-4840; doi:10.3390/s130404811
Received: 1 March 2013; in revised form: 2 April 2013 / Accepted: 9 April 2013 / Published: 11 April 2013| Download PDF Full-text (688 KB) | Download XML Full-text
Article: Carbon Based Electrodes Modified with Horseradish Peroxidase Immobilized in Conducting Polymers for Acetaminophen Analysis
Sensors 2013, 13(4), 4841-4854; doi:10.3390/s130404841
Received: 30 January 2013; in revised form: 25 March 2013 / Accepted: 8 April 2013 / Published: 11 April 2013| Download PDF Full-text (343 KB) | Download XML Full-text
Sensors 2013, 13(4), 5028-5039; doi:10.3390/s130405028
Received: 11 March 2013; in revised form: 3 April 2013 / Accepted: 7 April 2013 / Published: 15 April 2013| Download PDF Full-text (282 KB) | Download XML Full-text
Last update: 7 May 2013