Screen-printed electrodes based on carbon nanotubes and cytochrome P450scc for highly sensitive cholesterol biosensors
This paper is concerned with an investigation of electron transfer between cytochrome P450scc (CYP11A1) immobilized on nanostructured rhodium–graphite electrodes. Multi-walled carbon nanotubes (MWCNT) were deposited onto the rhodium–graphite electrodes by drop casting. Cytochrome P450scc was deposit...
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Veröffentlicht in: | Biosensors & bioelectronics 2008-09, Vol.24 (1), p.148-150 |
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description | This paper is concerned with an investigation of electron transfer between cytochrome P450scc (CYP11A1) immobilized on nanostructured rhodium–graphite electrodes. Multi-walled carbon nanotubes (MWCNT) were deposited onto the rhodium–graphite electrodes by drop casting. Cytochrome P450scc was deposited onto MWCNT-modified rhodium–graphite electrodes. Cytochrome P450scc was also deposited onto both gold nanoparticle-modified and bare rhodium–graphite electrodes, in order to have a comparison with our previous works in this field. Cyclic voltammetry indicated largest enhanced activity of the enzyme at the MWCNT-modified surface. The role of the nanotubes in mediating electron transfer to the cytochrome P450scc was verified as further improved with respect to the case of rhodium–graphite electrodes modified by the use of gold nanoparticles. The sensitivity of our system in cholesterol sensing is higher by orders of magnitude with respect to other similar systems very recently published that are based on cholesterol oxidase and esterase. The electron transfer improvement attained by the use of MWCNT in P450-based cholesterol biosensors was demonstrated to be larger than 2.4 times with respect to the use of gold nanoparticles and 17.8 times larger with respect to the case of simple bare electrodes. The sensitivity was equal to 1.12
μA/(mM
mm
2) and the linearity of the biosensor response was improved with respect to the use of gold nanoparticles. |
doi_str_mv | 10.1016/j.bios.2008.03.008 |
format | Article |
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μA/(mM
mm
2) and the linearity of the biosensor response was improved with respect to the use of gold nanoparticles.</description><identifier>ISSN: 0956-5663</identifier><identifier>EISSN: 1873-4235</identifier><identifier>DOI: 10.1016/j.bios.2008.03.008</identifier><identifier>PMID: 18455917</identifier><language>eng</language><publisher>England: Elsevier B.V</publisher><subject>Biosensing Techniques - instrumentation ; Biosensing Techniques - methods ; Biosensors ; Cholesterol ; Cholesterol - analysis ; Cholesterol Side-Chain Cleavage Enzyme - chemistry ; Cytochrome ; Electrodes ; Electron transfer ; Multi-walled carbon nanotubes ; Nanotubes, Carbon - chemistry ; Screen-printed electrodes ; Sensitivity and Specificity</subject><ispartof>Biosensors & bioelectronics, 2008-09, Vol.24 (1), p.148-150</ispartof><rights>2008 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c385t-ef7c3b65ec359a6ac2c0b8c9260b8f484eefca1a20a2771f0faea75067dabaf23</citedby><cites>FETCH-LOGICAL-c385t-ef7c3b65ec359a6ac2c0b8c9260b8f484eefca1a20a2771f0faea75067dabaf23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0956566308001322$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65534</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/18455917$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Carrara, Sandro</creatorcontrib><creatorcontrib>Shumyantseva, Victoria V.</creatorcontrib><creatorcontrib>Archakov, Alexander I.</creatorcontrib><creatorcontrib>Samorì, Bruno</creatorcontrib><title>Screen-printed electrodes based on carbon nanotubes and cytochrome P450scc for highly sensitive cholesterol biosensors</title><title>Biosensors & bioelectronics</title><addtitle>Biosens Bioelectron</addtitle><description>This paper is concerned with an investigation of electron transfer between cytochrome P450scc (CYP11A1) immobilized on nanostructured rhodium–graphite electrodes. Multi-walled carbon nanotubes (MWCNT) were deposited onto the rhodium–graphite electrodes by drop casting. Cytochrome P450scc was deposited onto MWCNT-modified rhodium–graphite electrodes. Cytochrome P450scc was also deposited onto both gold nanoparticle-modified and bare rhodium–graphite electrodes, in order to have a comparison with our previous works in this field. Cyclic voltammetry indicated largest enhanced activity of the enzyme at the MWCNT-modified surface. The role of the nanotubes in mediating electron transfer to the cytochrome P450scc was verified as further improved with respect to the case of rhodium–graphite electrodes modified by the use of gold nanoparticles. The sensitivity of our system in cholesterol sensing is higher by orders of magnitude with respect to other similar systems very recently published that are based on cholesterol oxidase and esterase. The electron transfer improvement attained by the use of MWCNT in P450-based cholesterol biosensors was demonstrated to be larger than 2.4 times with respect to the use of gold nanoparticles and 17.8 times larger with respect to the case of simple bare electrodes. The sensitivity was equal to 1.12
μA/(mM
mm
2) and the linearity of the biosensor response was improved with respect to the use of gold nanoparticles.</description><subject>Biosensing Techniques - instrumentation</subject><subject>Biosensing Techniques - methods</subject><subject>Biosensors</subject><subject>Cholesterol</subject><subject>Cholesterol - analysis</subject><subject>Cholesterol Side-Chain Cleavage Enzyme - chemistry</subject><subject>Cytochrome</subject><subject>Electrodes</subject><subject>Electron transfer</subject><subject>Multi-walled carbon nanotubes</subject><subject>Nanotubes, Carbon - chemistry</subject><subject>Screen-printed electrodes</subject><subject>Sensitivity and Specificity</subject><issn>0956-5663</issn><issn>1873-4235</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkU-LFDEQxYMo7rj6BTxITt66rSSddDd4kWX9AwsK6jmkqytOhp5kTXoG5tubYQa86elB1a8eVfUYey2gFSDMu107hVRaCTC0oNoqT9hGDL1qOqn0U7aBUZtGG6Nu2ItSdgDQixGesxsxdFqPot-w43fMRLF5zCGuNHNaCNecZip8cqUWUuTo8lQlupjWw1Q7Ls4cT2vCbU574t86DQWR-5T5NvzaLideKJawhiNx3KaFyko5Lfy8bm2kXF6yZ94thV5d9Zb9_Hj_4-5z8_D105e7Dw8NqkGvDfke1WQ0odKjMw4lwjTgKE0V3w0dkUcnnAQn-1548I5cr8H0s5ucl-qWvb34Pub0-1D3sPtQkJbFRUqHYs0ox1GB-i8oYZBy1F0F5QXEnErJ5G193d7lkxVgz7HYnT3fac-xWFC2Sh16c3U_THua_45cc6jA-wtA9RnHQNkWDBSR5pBrIHZO4V_-fwCxZaG5</recordid><startdate>20080915</startdate><enddate>20080915</enddate><creator>Carrara, Sandro</creator><creator>Shumyantseva, Victoria V.</creator><creator>Archakov, Alexander I.</creator><creator>Samorì, Bruno</creator><general>Elsevier B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QO</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope><scope>7X8</scope></search><sort><creationdate>20080915</creationdate><title>Screen-printed electrodes based on carbon nanotubes and cytochrome P450scc for highly sensitive cholesterol biosensors</title><author>Carrara, Sandro ; Shumyantseva, Victoria V. ; Archakov, Alexander I. ; Samorì, Bruno</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c385t-ef7c3b65ec359a6ac2c0b8c9260b8f484eefca1a20a2771f0faea75067dabaf23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Biosensing Techniques - instrumentation</topic><topic>Biosensing Techniques - methods</topic><topic>Biosensors</topic><topic>Cholesterol</topic><topic>Cholesterol - analysis</topic><topic>Cholesterol Side-Chain Cleavage Enzyme - chemistry</topic><topic>Cytochrome</topic><topic>Electrodes</topic><topic>Electron transfer</topic><topic>Multi-walled carbon nanotubes</topic><topic>Nanotubes, Carbon - chemistry</topic><topic>Screen-printed electrodes</topic><topic>Sensitivity and Specificity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Carrara, Sandro</creatorcontrib><creatorcontrib>Shumyantseva, Victoria V.</creatorcontrib><creatorcontrib>Archakov, Alexander I.</creatorcontrib><creatorcontrib>Samorì, Bruno</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Biotechnology Research Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Biosensors & bioelectronics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Carrara, Sandro</au><au>Shumyantseva, Victoria V.</au><au>Archakov, Alexander I.</au><au>Samorì, Bruno</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Screen-printed electrodes based on carbon nanotubes and cytochrome P450scc for highly sensitive cholesterol biosensors</atitle><jtitle>Biosensors & bioelectronics</jtitle><addtitle>Biosens Bioelectron</addtitle><date>2008-09-15</date><risdate>2008</risdate><volume>24</volume><issue>1</issue><spage>148</spage><epage>150</epage><pages>148-150</pages><issn>0956-5663</issn><eissn>1873-4235</eissn><abstract>This paper is concerned with an investigation of electron transfer between cytochrome P450scc (CYP11A1) immobilized on nanostructured rhodium–graphite electrodes. Multi-walled carbon nanotubes (MWCNT) were deposited onto the rhodium–graphite electrodes by drop casting. Cytochrome P450scc was deposited onto MWCNT-modified rhodium–graphite electrodes. Cytochrome P450scc was also deposited onto both gold nanoparticle-modified and bare rhodium–graphite electrodes, in order to have a comparison with our previous works in this field. Cyclic voltammetry indicated largest enhanced activity of the enzyme at the MWCNT-modified surface. The role of the nanotubes in mediating electron transfer to the cytochrome P450scc was verified as further improved with respect to the case of rhodium–graphite electrodes modified by the use of gold nanoparticles. The sensitivity of our system in cholesterol sensing is higher by orders of magnitude with respect to other similar systems very recently published that are based on cholesterol oxidase and esterase. The electron transfer improvement attained by the use of MWCNT in P450-based cholesterol biosensors was demonstrated to be larger than 2.4 times with respect to the use of gold nanoparticles and 17.8 times larger with respect to the case of simple bare electrodes. The sensitivity was equal to 1.12
μA/(mM
mm
2) and the linearity of the biosensor response was improved with respect to the use of gold nanoparticles.</abstract><cop>England</cop><pub>Elsevier B.V</pub><pmid>18455917</pmid><doi>10.1016/j.bios.2008.03.008</doi><tpages>3</tpages></addata></record> |
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subjects | Biosensing Techniques - instrumentation Biosensing Techniques - methods Biosensors Cholesterol Cholesterol - analysis Cholesterol Side-Chain Cleavage Enzyme - chemistry Cytochrome Electrodes Electron transfer Multi-walled carbon nanotubes Nanotubes, Carbon - chemistry Screen-printed electrodes Sensitivity and Specificity |
title | Screen-printed electrodes based on carbon nanotubes and cytochrome P450scc for highly sensitive cholesterol biosensors |
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