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dc.contributor.advisorLoadman, Paul M.
dc.contributor.advisorSutton, Chris W.
dc.contributor.authorBateson, Hannah*
dc.date.accessioned2013-11-22T10:09:45Z
dc.date.available2013-11-22T10:09:45Z
dc.date.issued2013-11-22
dc.identifier.urihttp://hdl.handle.net/10454/5712
dc.description.abstractIntroduction: Cellular membrane proteins, such as the cytochrome P450 enzyme superfamily (P450), have important roles in the physiology of the cell. P450s are important in metabolising endogenous molecules, as well as metabolising xenobiotic substances for detoxification and excretion. P450s are also implicated in cancer as they can act to ¿negatively¿ de-activate or ¿positively¿ activate cancer therapeutics. Identifying specific P450s that are highly up-regulated at the tumour site could be used to predict drug response and formulate targeted cancer therapy to help diminish systemic side-effects. Methods: Previous enrichment strategies have been unable to isolate the full complement of the P450 superfamily. To develop enrichment procedures for the P450s, a proteomic strategy was developed so that compounds could be screened for their effectiveness as general P450 probes. A standardised work-flow was created, encompassing affinity chromatography, protein concentration/desalting, followed by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) and high performance liquid chromatography-mass spectrometry (HPLC-MS). A ketoconazole analogue and a 2-EN analogue, with known P450 inhibition, were immobilised on a solid support for comparison to immobilised histamine. Co-factor removal, competitive elution and DTT cleavage of disulfide bonds of probes were utilised to elute bound proteins. Results/Discussion: Inhibitor-beads bound a large range of proteins, including P450¿s, of which some were eluted by co-factor removal, some by competitive elution. Specificity of binding was improved by optimising buffer conditions and solid supports, however non-specific binding was not totally eradicated. All human P450s from spiked samples and 18 P450s from more complex mouse liver samples were recovered using one or more ligands.en_US
dc.description.sponsorshipBruker Daltonicsen_US
dc.language.isoenen_US
dc.rights<a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>.eng
dc.subjectAffinity chromatographyen_US
dc.subjectProteomic techniquesen_US
dc.subjectProteomicsen_US
dc.subjectSDS-PAGEen_US
dc.subjectMALDIen_US
dc.subjectMass spectrometryen_US
dc.subjectCytochrome P450en_US
dc.titleDetection and enrichment of cytochrome P450s using bespoke affinity chromatography and proteomic techniques. Development of chemical immobilisation and novel affinity chromatography methods, with subsequent proteomic analysis, for the characterisation of cytochrome P450s important in cancer research.en_US
dc.type.qualificationleveldoctoralen_US
dc.publisher.institutionUniversity of Bradfordeng
dc.publisher.departmentInstitute of Cancer Therapeutics, School of Life Sciencesen_US
dc.typeThesiseng
dc.type.qualificationnamePhDen_US
dc.date.awarded2012
refterms.dateFOA2018-07-19T12:26:30Z


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