2019
DOI: 10.1016/j.aca.2018.10.032
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Monitoring of successive phosphorylations of thymidine using free and immobilized human nucleoside/nucleotide kinases by Flow Injection Analysis with High-Resolution Mass Spectrometry

Abstract: Nucleosides and their analogues play a crucial role in the treatment of several diseases including cancers and viral infections. Their therapeutic efficiency depends on their capacity to be converted to the active nucleoside triphosphates form through successive phosphorylation steps catalyzed by nucleoside/nucleotide kinases. It is thus mandatory to develop an easy, rapid, reliable and sensitive enzyme activity tests. In this study, we monitored the three-step phosphorylation of thymidine to thymidine triphos… Show more

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Cited by 6 publications
(5 citation statements)
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“…The evaluation of K m with online reactions is simpler and preferable to off-line reactions. In the period under review, K m values were quantified online with CE-UV absorbance detection for a variety of enzymes including ecto-5-nucleotidase, human recombinant matrix metalloproteinase, human neutrophil elastase, bovine testicular hyaluronidase, histone deacetylase, thrombin, and human nucleoside/nucleotide kinases . In other reports, K m values were quantified online with CE-fluorescence detection for d -amino acid oxidase and BCR-ABL .…”
Section: Proteinsmentioning
confidence: 99%
See 1 more Smart Citation
“…The evaluation of K m with online reactions is simpler and preferable to off-line reactions. In the period under review, K m values were quantified online with CE-UV absorbance detection for a variety of enzymes including ecto-5-nucleotidase, human recombinant matrix metalloproteinase, human neutrophil elastase, bovine testicular hyaluronidase, histone deacetylase, thrombin, and human nucleoside/nucleotide kinases . In other reports, K m values were quantified online with CE-fluorescence detection for d -amino acid oxidase and BCR-ABL .…”
Section: Proteinsmentioning
confidence: 99%
“…In the period under review, K m values were quantified online with CE-UV absorbance detection for a variety of enzymes including ecto-5-nucleotidase, 54 human recombinant matrix metalloproteinase, 55 human neutrophil elastase, 55 bovine testicular hyaluronidase, 55 histone deacetylase, 56 thrombin, 52 and human nucleoside/nucleotide kinases. 57 In other reports, K m values were quantified online with CE-fluorescence detection for D-amino acid oxidase 58 and BCR-ABL. 59 Further, K m values have been determined using online CE-UV detection for immobilized enzymes like penicillinase, 47 acetylcholinesterase, 46,53 alanine aminotransferase, 49 trypsin, 44 and β-glucosidase.…”
Section: ■ Proteinsmentioning
confidence: 99%
“…However, in the case of immobilized enzymes, it is necessary to draw attention to parameters that are not associated with free enzyme catalysis: diffusion-related restrictions and decrease in enzyme mobility. These factors could affect the mobility of substrates and cofactors, the mass transfer of substrates and products [104]. However, the mass transfer resistance has been shown to decrease with increased flow rates and increased stirring.…”
Section: In Vitro Protein Phosphorylation By Immobilized Kinasesmentioning
confidence: 99%
“…FIA-HRMS was successfully applied in identifying and detecting target and suspect psychoactive compounds in recreational drugs on the basis of accurate mass measurements . In addition, FIA-HRMS was employed in the quantitative analysis of multianalytes in tobacco and in enzyme kinetic studies to monitor the successive phosphorylation of thymidine. , …”
Section: Flow Injection Analysis-mass Spectrometry (Fia-ms)mentioning
confidence: 99%
“…33 In addition, FIA-HRMS was employed in the quantitative analysis of multianalytes in tobacco and in enzyme kinetic studies to monitor the successive phosphorylation of thymidine. 8,34 A major setback in the utilization of FIA-MS is matrix effects, and whether it is through ion enhancement or suppression, it compromises the analytical data. 35 Similar to LC-MS, using suitable internal standards, can correct for matrix effects to ensure that the analytical method is accurate and reliable.…”
Section: ■ Flow Injection Analysis-mass Spectrometry (Fia-ms)mentioning
confidence: 99%