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Maitz A, Haussner F, Braumüller S, Hoffmann A, Lupu L, Wachter U, Radermacher P, Braun CK, Wilke HJ, Vogt M, Ignatius A, Halbgebauer R, Bettac L, Barth TFE, Huber-Lang M, Palmer A. Temporal-spatial organ response after blast-induced experimental blunt abdominal trauma. FASEB J 2021; 35:e22038. [PMID: 34748229 DOI: 10.1096/fj.202100995r] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/14/2021] [Accepted: 10/28/2021] [Indexed: 11/11/2022]
Abstract
Abdominal trauma (AT) is of major global importance, particularly with the increased potential for civil, terroristic, and military trauma. The injury pattern and systemic consequences of blunt abdominal injuries are highly variable and frequently underestimated or even missed, and the pathomechanisms remain still poorly understood. Therefore, we investigated the temporal-spatial organ and immune response after a standardized blast-induced blunt AT. Anesthetized mice were exposed to a single blast wave centered on the epigastrium. At 2, 6, or 24 h after trauma, abdominal organ damage was assessed macroscopically, microscopically, and biochemically. A higher degree of trauma severity, determined by a reduction of the distance between the epigastrium and blast inductor, was reflected by a reduced survival rate. The hemodynamic monitoring during the first 120 min after AT revealed a decline in the mean arterial pressure within the first 80 min, whereas the heart rate remained quite stable. AT induced a systemic damage and inflammatory response, evidenced by elevated HMGB-1 and IL-6 plasma levels. The macroscopic injury pattern of the abdominal organs (while complex) was consistent, with the following frequency: liver > pancreas > spleen > left kidney > intestine > right kidney > others > lungs and was reflected by microscopic liver and pancreas damages. Plasma levels of organ dysfunction markers increased during the first 6 h after AT and subsequently declined, indicating an early, temporal impairment of the function on a multi-organ level. The established highly reproducible murine blunt AT, with time- and trauma-severity-dependent organ injury patterns, systemic inflammatory response, and impairment of various organ functions, reflects characteristics of human AT. In the future, this model may help to study the complex immuno-pathophysiological consequences and innovative therapeutic approaches after blunt AT.
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Affiliation(s)
- Alexander Maitz
- Institute of Clinical and Experimental Trauma-Immunology, Ulm University Medical Center, Ulm, Germany
| | - Felix Haussner
- Institute of Clinical and Experimental Trauma-Immunology, Ulm University Medical Center, Ulm, Germany
| | - Sonja Braumüller
- Institute of Clinical and Experimental Trauma-Immunology, Ulm University Medical Center, Ulm, Germany
| | - Andrea Hoffmann
- Institute of Anesthesiological Pathophysiology and Process Engineering, Ulm University Medical Center, Ulm, Germany
| | - Ludmila Lupu
- Institute of Clinical and Experimental Trauma-Immunology, Ulm University Medical Center, Ulm, Germany
| | - Ulrich Wachter
- Institute of Anesthesiological Pathophysiology and Process Engineering, Ulm University Medical Center, Ulm, Germany
| | - Peter Radermacher
- Institute of Anesthesiological Pathophysiology and Process Engineering, Ulm University Medical Center, Ulm, Germany
| | - Christian K Braun
- Institute of Clinical and Experimental Trauma-Immunology, Ulm University Medical Center, Ulm, Germany.,Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - Hans-Joachim Wilke
- Institute of Orthopedic Research and Biomechanics, Ulm University Medical Center, Ulm, Germany
| | - Morten Vogt
- Institute of Orthopedic Research and Biomechanics, Ulm University Medical Center, Ulm, Germany
| | - Anita Ignatius
- Institute of Orthopedic Research and Biomechanics, Ulm University Medical Center, Ulm, Germany
| | - Rebecca Halbgebauer
- Institute of Clinical and Experimental Trauma-Immunology, Ulm University Medical Center, Ulm, Germany
| | - Lucas Bettac
- Department of Internal Medicine I, Ulm University Medical Center, Ulm, Germany
| | - Thomas F E Barth
- Institute of Pathology, Ulm University Medical Center, Ulm, Germany
| | - Markus Huber-Lang
- Institute of Clinical and Experimental Trauma-Immunology, Ulm University Medical Center, Ulm, Germany
| | - Annette Palmer
- Institute of Clinical and Experimental Trauma-Immunology, Ulm University Medical Center, Ulm, Germany
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GC-MS Studies on Derivatization of Creatinine and Creatine by BSTFA and Their Measurement in Human Urine. Molecules 2021; 26:molecules26113206. [PMID: 34071971 PMCID: PMC8198549 DOI: 10.3390/molecules26113206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 05/21/2021] [Accepted: 05/22/2021] [Indexed: 12/05/2022] Open
Abstract
In consideration of its relatively constant urinary excretion rate, creatinine (2-amino-1-methyl-5H-imidazol-4-one, MW 113.1) in urine is a useful endogenous biochemical parameter to correct the urinary excretion rate of numerous endogenous and exogenous substances. Reliable measurement of creatinine by gas chromatography (GC)-based methods requires derivatization of its amine and keto groups. Creatinine exists in equilibrium with its open form creatine (methylguanidoacetic acid, MW 131.1), which has a guanidine and a carboxylic group. Trimethylsilylation and trifluoroacetylation of creatinine and creatine are the oldest reported derivatization methods for their GC-mass spectrometry (MS) analysis in human serum using flame- or electron-ionization. We performed GC-MS studies on the derivatization of creatinine (d0-creatinine), [methylo-2H3]creatinine (d3-creatinine, internal standard) and creatine (d0-creatine) with N,O-bis(trimethylsilyl)trifluoroacetamide (BSTFA) using standard derivatization conditions (60 min, 60 °C), yet in the absence of any base. Reaction products were characterized both in the negative-ion chemical ionization (NICI) and in the positive-ion chemical ionization (PICI) mode. Creatinine and creatine reacted with BSTFA to form several derivatives. Their early eluting N,N,O-tris(trimethylsilyl) derivatives (8.9 min) were found to be useful for the precise and accurate measurement of the sum of creatinine and creatine in human urine (10 µL, up to 20 mM) by selected-ion monitoring (SIM) of m/z 271 (d0-creatinine/d0-creatine) and m/z 274 (d3-creatinine) in the NICI mode. In the PICI mode, SIM of m/z 256, m/z 259, m/z 272 and m/z 275 was performed. BSTFA derivatization of d0-creatine from a freshly prepared solution in distilled water resulted in formation of two lMate-eluting derivatives (14.08 min, 14.72 min), presumably creatinyl-creatinine, with the creatininyl residue existing in its enol form (14.08 min) and keto form (14.72 min). Our results suggest that BSTFA derivatization does not allow specific analysis of creatine and creatinine by GC-MS. Preliminary analyses suggest that pentafluoropropionic anhydride (PFPA) is also not useful for the measurement of creatinine in the presence of creatine. Both BSTFA and PFPA facilitate the conversion of creatine to creatinine. Specific measurement of creatinine in urine is possible by using pentafluorobenzyl bromide in aqueous acetone.
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Development of Monoclonal Antibody-Based EIA for Tetranor-PGDM which Reflects PGD 2 Production in the Body. J Immunol Res 2021; 2021:5591115. [PMID: 33997056 PMCID: PMC8096570 DOI: 10.1155/2021/5591115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 03/31/2021] [Accepted: 04/13/2021] [Indexed: 11/21/2022] Open
Abstract
Tetranor-PGDM is a metabolite of PGD2. Urinary tetranor-PGDM levels were reported to be increased in some diseases, including food allergy, Duchenne muscular dystrophy, and aspirin-intolerant asthma. In this study, we developed a monoclonal antibody (MAb) and a competitive enzyme immunoassay (EIA) for measuring tetranor-PGDM. Spleen cells isolated from mice immunized with tetranor-PGDM were utilized to generate Ab-producing hybridomas. We chose hybridomas and purified MAb against tetranor-PGDM to develop competitive EIA. The assay evaluated the optimal ionic strength, pH, precision, and reliability. Specificity was determined by cross-reactivity to tetranor-PGEM, tetranor-PGFM, and tetranor-PGAM. Recovery was determined by spiking experiments on artificial urine. Optimal ionic strength was 150 mM NaCl, and optimal pH was pH 7.5. Metabolites other than tetranor-PGDM did not show any significant cross-reactivity in the EIA. The assay exhibited a half-maximal inhibition concentration (IC50) of 1.79 ng/mL, limit of detection (LOD) of 0.0498 ng/mL, and range of quantitation (ROQ) value of 0.252 to 20.2 ng/mL. The intra- and inter-assay variation for tetranor-PGDM was 3.9–6.0% and 5.7–10.4%, respectively. The linearity-dilution effect showed excellent linearity under dilution when artificial urine samples were applied to solid-phase extraction (SPE). After SPE, recovery of tetranor-PGDM in artificial urine averaged from 82.3% to 113.5% and was within acceptable limits (80%–120%). We successfully generated one monoclonal antibody and developed a sensitive competitive EIA. The established EIA would be useful for routine detection and monitoring of tetranor-PGDM in research or diagnostic body fluids.
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Appiah SA, Foxx CL, Langgartner D, Palmer A, Zambrano CA, Braumüller S, Schaefer EJ, Wachter U, Elam BL, Radermacher P, Stamper CE, Heinze JD, Salazar SN, Luthens AK, Arnold AL, Reber SO, Huber-Lang M, Lowry CA, Halbgebauer R. Evaluation of the gut microbiome in association with biological signatures of inflammation in murine polytrauma and shock. Sci Rep 2021; 11:6665. [PMID: 33758228 PMCID: PMC7988149 DOI: 10.1038/s41598-021-85897-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 03/05/2021] [Indexed: 12/03/2022] Open
Abstract
Severe injuries are frequently accompanied by hemorrhagic shock and harbor an increased risk for complications. Local or systemic inflammation after trauma/hemorrhage may lead to a leaky intestinal epithelial barrier and subsequent translocation of gut microbiota, potentially worsening outcomes. To evaluate the extent with which trauma affects the gut microbiota composition, we performed a post hoc analysis of a murine model of polytrauma and hemorrhage. Four hours after injury, organs and plasma samples were collected, and the diversity and composition of the cecal microbiome were evaluated using 16S rRNA gene sequencing. Although cecal microbial alpha diversity and microbial community composition were not found to be different between experimental groups, norepinephrine support in shock animals resulted in increased alpha diversity, as indicated by higher numbers of distinct microbial features. We observed that the concentrations of proinflammatory mediators in plasma and intestinal tissue were associated with measures of microbial alpha and beta diversity and the presence of specific microbial drivers of inflammation, suggesting that the composition of the gut microbiome at the time of trauma, or shortly after trauma exposure, may play an important role in determining physiological outcomes. In conclusion, we found associations between measures of gut microbial alpha and beta diversity and the severity of systemic and local gut inflammation. Furthermore, our data suggest that four hours following injury is too early for development of global changes in the alpha diversity or community composition of the intestinal microbiome. Future investigations with increased temporal-spatial resolution are needed in order to fully elucidate the effects of trauma and shock on the gut microbiome, biological signatures of inflammation, and proximal and distal outcomes.
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Affiliation(s)
- Sandra A Appiah
- Department of Integrative Physiology and Center for Microbial Exploration, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Christine L Foxx
- Department of Integrative Physiology and Center for Microbial Exploration, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Dominik Langgartner
- Laboratory for Molecular Psychosomatics, Department of Psychosomatic Medicine and Psychotherapy, University Ulm, 89081, Ulm, Germany
| | - Annette Palmer
- Institute of Clinical and Experimental Trauma Immunology, Centre for Biomedical Research, University Hospital Ulm, University Ulm, Helmholtzstr. 8/1, 89081, Ulm, Germany
| | - Cristian A Zambrano
- Department of Integrative Physiology and Center for Microbial Exploration, University of Colorado Boulder, Boulder, CO, 80309, USA
- Center for Neuroscience, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Sonja Braumüller
- Institute of Clinical and Experimental Trauma Immunology, Centre for Biomedical Research, University Hospital Ulm, University Ulm, Helmholtzstr. 8/1, 89081, Ulm, Germany
| | - Evan J Schaefer
- Department of Integrative Physiology and Center for Microbial Exploration, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Ulrich Wachter
- Institute for Anaesthesiological Pathophysiology and Process Development, University of Ulm, Ulm, Germany
| | - Brooke L Elam
- Department of Integrative Physiology and Center for Microbial Exploration, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Peter Radermacher
- Institute for Anaesthesiological Pathophysiology and Process Development, University of Ulm, Ulm, Germany
| | - Christopher E Stamper
- Department of Integrative Physiology and Center for Microbial Exploration, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Jared D Heinze
- Department of Integrative Physiology and Center for Microbial Exploration, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Stephanie N Salazar
- Department of Integrative Physiology and Center for Microbial Exploration, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Amalia K Luthens
- Department of Integrative Physiology and Center for Microbial Exploration, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Andrea L Arnold
- Department of Integrative Physiology and Center for Microbial Exploration, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Stefan O Reber
- Laboratory for Molecular Psychosomatics, Department of Psychosomatic Medicine and Psychotherapy, University Ulm, 89081, Ulm, Germany
| | - Markus Huber-Lang
- Institute of Clinical and Experimental Trauma Immunology, Centre for Biomedical Research, University Hospital Ulm, University Ulm, Helmholtzstr. 8/1, 89081, Ulm, Germany.
| | - Christopher A Lowry
- Department of Integrative Physiology and Center for Microbial Exploration, University of Colorado Boulder, Boulder, CO, 80309, USA
- Center for Neuroscience, University of Colorado Boulder, Boulder, CO, 80309, USA
- Department of Physical Medicine and Rehabilitation and Center for Neuroscience, University of Colorado Anschutz, Medical Campus, Aurora, CO, 80045, USA
- Rocky Mountain Mental Illness Research Education and Clinical Center (MIRECC), Rocky Mountain Regional Veterans Affairs Medical Center (RMRVAMC), Aurora, CO, 80045, USA
- Military and Veteran Microbiome Consortium for Research and Education (MVM-CoRE), Aurora, CO, 80045, USA
| | - Rebecca Halbgebauer
- Institute of Clinical and Experimental Trauma Immunology, Centre for Biomedical Research, University Hospital Ulm, University Ulm, Helmholtzstr. 8/1, 89081, Ulm, Germany
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Patel DP, Pauly GT, Tada T, Parker AL, Toulabi L, Kanke Y, Oike T, Krausz KW, Gonzalez FJ, Harris CC. Improved detection and precise relative quantification of the urinary cancer metabolite biomarkers - Creatine riboside, creatinine riboside, creatine and creatinine by UPLC-ESI-MS/MS: Application to the NCI-Maryland cohort population controls and lung cancer cases. J Pharm Biomed Anal 2020; 191:113596. [PMID: 32937240 PMCID: PMC7756200 DOI: 10.1016/j.jpba.2020.113596] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/11/2020] [Accepted: 08/12/2020] [Indexed: 01/21/2023]
Abstract
Creatine riboside (CR) is a novel metabolite of cancer metabolism. It is a urinary diagnostic biomarker of lung and liver cancer risk and prognosis. The level of CR is highly positive correlated in tumor and urine indicating that it is derived from human lung and liver cancers. A precise and sensitive ultra-pressure liquid chromatography-tandem mass spectrometry (UPLC-ESI-MS/MS) method was developed and validated for simultaneous quantification of the noninvasive biomarker CR, along with creatinine riboside (CNR), and their precursors creatine and creatinine, utilizing the labeled internal standard creatine riboside-13C,15N2 (CR-13C,15N2). Chromatography was carried out on a hydrophilic interaction chromatography column under a gradient mobile phase condition. MRM transitions were monitored for CR (264.1 > 132.1, m/z), CNR (246.1 > 113.9, m/z), creatine (132.0 > 72.0, m/z), creatinine (114.0 > 85.8, m/z) and CR-13C,15N2 (267.1 > 134.9, m/z) with a 11.0 min run time in the positive mode ionization. The calibration plot of the method was linear over the concentration range of 4.50-10,000 nM. Method validation was performed according to regulatory guidelines established for sensitivity, selectivity, calibration curve, stability at different storage conditions, reinjection reproducibility, ruggedness with acceptable accuracy, and precision. This assay was applied for the quantification of CR along with CNR, creatine and creatinine in a subset of urine and serum samples from the National Cancer Institute - Maryland (NCI-MD) cohort population controls and lung cancer cases. It can be standardized and used in multiple laboratories for cancer diagnosis and determining the efficacy of cancer therapy and monitoring cancer recurrence.
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Affiliation(s)
- Daxesh P Patel
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Gary T Pauly
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Fredrick, MD, USA
| | - Takeshi Tada
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Amelia L Parker
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Leila Toulabi
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Yasuyuki Kanke
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Takahiro Oike
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Kristopher W Krausz
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Frank J Gonzalez
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Curtis C Harris
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA.
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Piestansky J, Galba J, Kovacech B, Parrak V, Kovac A, Mikuš P. Capillary electrophoresis and ultra‐high‐performance liquid chromatography methods in clinical monitoring of creatinine in human urine: A comparative study. Biomed Chromatogr 2020; 34:e4907. [DOI: 10.1002/bmc.4907] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/21/2020] [Accepted: 05/25/2020] [Indexed: 12/17/2022]
Affiliation(s)
- Juraj Piestansky
- Department of Pharmaceutical Analysis and Nuclear Pharmacy Comenius University in Bratislava Bratislava Slovak Republic
- Toxicological and Antidoping Center Comenius University in Bratislava Bratislava Slovak Republic
| | - Jaroslav Galba
- Department of Pharmaceutical Analysis and Nuclear Pharmacy Comenius University in Bratislava Bratislava Slovak Republic
- AXON Neuroscience R&D Bratislava Slovak Republic
| | - Branislav Kovacech
- AXON Neuroscience R&D Bratislava Slovak Republic
- Institute of Neuroimmunology, Slovak Academy of Science Bratislava Slovak Republic
| | - Vojtech Parrak
- AXON Neuroscience R&D Bratislava Slovak Republic
- Institute of Neuroimmunology, Slovak Academy of Science Bratislava Slovak Republic
| | - Andrej Kovac
- AXON Neuroscience R&D Bratislava Slovak Republic
- Institute of Neuroimmunology, Slovak Academy of Science Bratislava Slovak Republic
| | - Peter Mikuš
- Department of Pharmaceutical Analysis and Nuclear Pharmacy Comenius University in Bratislava Bratislava Slovak Republic
- Toxicological and Antidoping Center Comenius University in Bratislava Bratislava Slovak Republic
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Abstract
Hemorrhagic shock (HS) after tissue trauma increases the complication and mortality rate of polytrauma (PT) patients. Although several murine trauma models have been introduced, there is a lack of knowledge about the exact impact of an additional HS. We hypothesized that HS significantly contributes to organ injury, which can be reliably monitored by detection of specific organ damage markers. Therefore we established a novel clinically relevant PT plus HS model in C57BL/6 mice which were randomly assigned to control, HS, PT, or PT+HS procedure (n = 8 per group). For induction of PT, anesthetized animals received a blunt chest trauma, head injury, femur fracture, and soft tissue injury. HS was induced by pressure-controlled blood drawing (mean arterial blood pressure of 30 mmHg for 60 min) and mice then resuscitated with ionosterile (4 × volume drawn), monitored, and killed for blood and organ harvesting 4 h after injury. After HS and resuscitation, PT+HS mice required earlier and overall more catecholamine support than HS animals to keep their mean arterial blood pressure. HS significantly contributed to the systemic release of interleukin-6 and high mobility group box 1 protein. Furthermore, the histological lung injury score, pulmonary edema, neutrophil influx, and plasma clara cell protein 16 were all significantly enhanced in PT animals in the presence of an additional HS. Although early morphological changes were minor, HS also contributed functionally to remote acute kidney injury but not to early liver damage. Moreover, PT-induced systemic endothelial injury, as determined by plasma syndecan-1 levels, was significantly aggravated by an additional HS. These results indicate that HS adds to the systemic inflammatory reaction early after PT. Within hours after PT, HS seems to aggravate pulmonary damage and to worsen renal and endothelial function which might overall contribute to the development of early multiple organ dysfunction.
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Kalaivani GJ, Suja SK. Enzyme-less sensing of the kidney dysfunction biomarker creatinine using an inulin based bio-nanocomposite. NEW J CHEM 2019. [DOI: 10.1039/c9nj00594c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enzyme-less electrochemical sensing of creatinine using an inulin-based bio-nanocomposite.
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Affiliation(s)
| | - S. K. Suja
- Department of Chemistry
- Lady Doak College
- Madurai
- India
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Development of Ratiometric Fluorescent Biosensors for the Determination of Creatine and Creatinine in Urine. SENSORS 2017; 17:s17112570. [PMID: 29117119 PMCID: PMC5712879 DOI: 10.3390/s17112570] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 10/23/2017] [Accepted: 11/06/2017] [Indexed: 02/07/2023]
Abstract
In this study, the oxazine 170 perchlorate (O17)-ethylcellulose (EC) membrane was successfully exploited for the fabrication of creatine- and creatinine-sensing membranes. The sensing membrane exhibited a double layer of O17-EC membrane and a layer of enzyme(s) entrapped in the EC and polyurethane hydrogel (PU) matrix. The sensing principle of the membranes was based on the hydrolytic catalysis of urea, creatine, and creatinine by the enzymes. The reaction end product, ammonia, reacted with O17-EC membrane, resulting in the change in fluorescence intensities at two emission wavelengths (λem = 565 and 625 nm). Data collected from the ratio of fluorescence intensities at λem = 565 and 625 nm were proportional to the concentrations of creatine or creatinine. Creatine- and creatinine-sensing membranes were very sensitive to creatine and creatinine at the concentration range of 0.1–1.0 mM, with a limit of detection (LOD) of 0.015 and 0.0325 mM, respectively. Furthermore, these sensing membranes showed good features in terms of response time, reversibility, and long-term stability. The interference study demonstrated that some components such as amino acids and salts had some negative effects on the analytical performance of the membranes. Thus, the simple and sensitive ratiometric fluorescent sensors provide a simple and comprehensive method for the determination of creatine and creatinine concentrations in urine.
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Kubalczyk P, Głowacki R. Determination of lipoic acid in human urine by capillary zone electrophoresis. Electrophoresis 2017; 38:1800-1805. [DOI: 10.1002/elps.201700002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 04/11/2017] [Accepted: 04/11/2017] [Indexed: 12/16/2022]
Affiliation(s)
- Paweł Kubalczyk
- Department of Environmental Chemistry; Faculty of Chemistry; University of Łódź; Łódź Poland
| | - Rafał Głowacki
- Department of Environmental Chemistry; Faculty of Chemistry; University of Łódź; Łódź Poland
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11
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Electrochemical creatinine sensor based on a glassy carbon electrode modified with a molecularly imprinted polymer and a Ni@polyaniline nanocomposite. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1998-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Viswanath KB, Devasenathipathy R, Wang SF, Vasantha VS. A New Route for the Enzymeless Trace Level Detection of Creatinine Based on Reduced Graphene Oxide/Silver Nanocomposite Biosensor. ELECTROANAL 2016. [DOI: 10.1002/elan.201600425] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- K. Balaji Viswanath
- Department of Natural Products Chemistry; Madurai Kamaraj University; Madurai India
| | - Rajkumar Devasenathipathy
- Department of Materials and Mineral Resources Engineering; National Taipei University of Technology; Taipei Taiwan
| | - Sea-Fue Wang
- Department of Materials and Mineral Resources Engineering; National Taipei University of Technology; Taipei Taiwan
| | - V. S. Vasantha
- Department of Natural Products Chemistry; Madurai Kamaraj University; Madurai India
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Kim H, Seo C, Kim Y, Na M, Kang JS, Lee W, Paik MJ. Simultaneous Urinary Creatine and Creatinine Analysis by High Performance Liquid Chromatography. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10743] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hyunbin Kim
- College of Pharmacy; Sunchon National University; Suncheon 540-950 Korea
| | - Chan Seo
- College of Pharmacy; Sunchon National University; Suncheon 540-950 Korea
| | - Youngbae Kim
- College of Pharmacy; Sunchon National University; Suncheon 540-950 Korea
| | - Myungjin Na
- College of Pharmacy; Sunchon National University; Suncheon 540-950 Korea
| | - Jong Seong Kang
- College of Pharmacy; Chungnam National University; Daejeon 305-764 Korea
| | - Wonjae Lee
- College of Pharmacy; Chosun University; Gwangju 501-759 Korea
| | - Man-Jeong Paik
- College of Pharmacy; Sunchon National University; Suncheon 540-950 Korea
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Du J, Zhu B, Leow WR, Chen S, Sum TC, Peng X, Chen X. Colorimetric Detection of Creatinine Based on Plasmonic Nanoparticles via Synergistic Coordination Chemistry. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:4104-4110. [PMID: 26037022 DOI: 10.1002/smll.201403369] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 04/01/2015] [Indexed: 06/04/2023]
Abstract
A simple and portable colorimetric assay for creatinine detection is fabricated based on the synergistic coordination of creatinine and uric acid with Hg(2+) on the surface of gold nanoparticles, which exhibits good selectivity and sensitivity. Point-of-care clinical creatinine monitoring can be supported for monitoring renal function and diagnosing corresponding renal diseases at home.
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Affiliation(s)
- Jianjun Du
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China
| | - Bowen Zhu
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Wan Ru Leow
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Shi Chen
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Tze Chien Sum
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Xiaojun Peng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China
| | - Xiaodong Chen
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
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15
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Fraselle S, De Cremer K, Coucke W, Glorieux G, Vanmassenhove J, Schepers E, Neirynck N, Van Overmeire I, Van Loco J, Van Biesen W, Vanholder R. Development and validation of an ultra-high performance liquid chromatography-tandem mass spectrometry method to measure creatinine in human urine. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 988:88-97. [PMID: 25756209 DOI: 10.1016/j.jchromb.2015.02.026] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 02/18/2015] [Accepted: 02/20/2015] [Indexed: 11/19/2022]
Abstract
Despite decades of creatinine measurement in biological fluids using a large variety of analytical methods, an accurate determination of this compound remains challenging. Especially with the novel trend to assess biomarkers on large sample sets preserved in biobanks, a simple and fast method that could cope with both a high sample throughput and a low volume of sample is still of interest. In answer to these challenges, a fast and accurate ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) method was developed to measure creatinine in small volumes of human urine. In this method, urine samples are simply diluted with a basic mobile phase and injected directly under positive electrospray ionization (ESI) conditions, without further purification steps. The combination of an important diluting factor (10(4) times) due to the use of a very sensitive triple quadrupole mass spectrometer (XEVO TQ) and the addition of creatinine-d3 as internal standard completely eliminates matrix effects coming from the urine. The method was validated in-house in 2012 according to the EMA guideline on bioanalytical method validation using Certified Reference samples from the German External Quality Assessment Scheme (G-Equas) proficiency test. All obtained results for accuracy and recovery are within the authorized tolerance ranges defined by G-Equas. The method is linear between 0 and 5 g/L, with LOD and LOQ of 5 × 10(-3) g/L and 10(-2) g/L, respectively. The repeatability (CV(r) = 1.03-2.07%) and intra-laboratory reproducibility (CV(RW) = 1.97-2.40%) satisfy the EMA 2012 guideline. The validated method was firstly applied to perform the German G-Equas proficiency test rounds 51 and 53, in 2013 and 2014, respectively. The obtained results were again all within the accepted tolerance ranges and very close to the reference values defined by the organizers of the proficiency test scheme, demonstrating an excellent accuracy of the developed method. The method was finally applied to measure the creatinine concentration in 210 urine samples, coming from 190 patients with a chronic kidney disease (CKD) and 20 healthy subjects. The obtained creatinine concentrations (ranging from 0.12 g/L up to 3.84 g/L) were compared, by means of a Passing Bablok regression, with the creatinine contents obtained for the same samples measured using a traditional compensated Jaffé method. The UHPLC-MS/MS method described in this paper can be used to normalize the concentration of biomarkers in urine for the extent of dilution.
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Affiliation(s)
- S Fraselle
- Scientific Institute of Public Health, Department of Food, Medicines and Consumer Safety, Brussels, Belgium.
| | - K De Cremer
- Scientific Institute of Public Health, Department of Food, Medicines and Consumer Safety, Brussels, Belgium
| | - W Coucke
- Scientific Institute of Public Health, Quality of Medical Laboratories, Brussels, Belgium
| | - G Glorieux
- Ghent University Hospital, Renal Division, Ghent, Belgium
| | | | - E Schepers
- Ghent University Hospital, Renal Division, Ghent, Belgium
| | - N Neirynck
- Ghent University Hospital, Renal Division, Ghent, Belgium
| | - I Van Overmeire
- Scientific Institute of Public Health, Department of Food, Medicines and Consumer Safety, Brussels, Belgium
| | - J Van Loco
- Scientific Institute of Public Health, Department of Food, Medicines and Consumer Safety, Brussels, Belgium
| | - W Van Biesen
- Ghent University Hospital, Renal Division, Ghent, Belgium
| | - R Vanholder
- Ghent University Hospital, Renal Division, Ghent, Belgium
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16
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Yan Y, Zeng MM, Zheng ZP, He ZY, Tao GJ, Zhang S, Gao YH, Chen J. Simultaneous analysis of PhIP, 4'-OH-PhIP, and their precursors using UHPLC-MS/MS. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:11628-11636. [PMID: 25407701 DOI: 10.1021/jf503776e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A novel method allowing simultaneous analysis of PhIP, 4'-OH-PhIP, and their precursors (phenylalanine, tyrosine, creatine, creatinine, glucose) has been developed as a robust kinetic study tool by using ultra high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). A direct hydrochloric acid (HCl) extraction was applied to achieve the simultaneous extraction of all seven analytes, with the mean recoveries ranging from 60% to 120% at two concentration levels. Then, an Atlantis dC18 column selected from four different chromatographic columns was ultimately used to separate these compounds within 15 min. The limits of detection range of allseven analytes were calculated as 0.14-325.00 μg L(-1). The intra- and interday precision of the proposed method were less than 15.4 and 19.9%, respectively. The proposed method was successfully applied to depict the kinetic profiles of PhIP, 4'-OH-PhIP, and their precursors in pork model, reducing the analysis time and cost in the kinetic study.
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Affiliation(s)
- Yan Yan
- Key Laboratory of Food Science and Technology, Jiangnan University , Wuxi 214122, People's Republic of China
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17
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Photochemical decoration of magnetic composites with silver nanostructures for determination of creatinine in urine by surface-enhanced Raman spectroscopy. Talanta 2014; 130:55-62. [DOI: 10.1016/j.talanta.2014.06.047] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 06/19/2014] [Accepted: 06/20/2014] [Indexed: 11/24/2022]
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18
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Ferraro V, Cruz IB, Ferreira Jorge R, Pintado ME, Castro PM. Kinetics of Release of Water and Nutrients from Codfish ( Gadus morhua L.) through a Heavy-Salting. J FOOD PROCESS PRES 2014. [DOI: 10.1111/jfpp.12146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vincenza Ferraro
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório associado, Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Dr. António Bernardino de Almeida 4200-072 Porto Portugal
- WeDoTech - Companhia de Ideias e Tecnologias, Lda./CiDEB, Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Porto Portugal
| | - Isabel B. Cruz
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório associado, Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Dr. António Bernardino de Almeida 4200-072 Porto Portugal
- WeDoTech - Companhia de Ideias e Tecnologias, Lda./CiDEB, Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Porto Portugal
| | - Ruben Ferreira Jorge
- WeDoTech - Companhia de Ideias e Tecnologias, Lda./CiDEB, Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Porto Portugal
| | - Manuela E. Pintado
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório associado, Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Dr. António Bernardino de Almeida 4200-072 Porto Portugal
| | - Paula M.L. Castro
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório associado, Escola Superior de Biotecnologia; Universidade Católica Portuguesa/Porto; Rua Dr. António Bernardino de Almeida 4200-072 Porto Portugal
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Pavlíček V, Tůma P, Matějčková J, Samcová E. Very fast electrophoretic determination of creatinine and uric acid in human urine using a combination of two capillaries with different internal diameters. Electrophoresis 2014; 35:956-61. [DOI: 10.1002/elps.201300293] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 08/16/2013] [Accepted: 08/16/2013] [Indexed: 12/20/2022]
Affiliation(s)
- Václav Pavlíček
- Third Faculty of Medicine; Institute of Biochemistry; Cell and Molecular Biology; Charles University in Prague; Czech Republic
| | - Petr Tůma
- Third Faculty of Medicine; Institute of Biochemistry; Cell and Molecular Biology; Charles University in Prague; Czech Republic
| | - Jana Matějčková
- Third Faculty of Medicine; Institute of Biochemistry; Cell and Molecular Biology; Charles University in Prague; Czech Republic
| | - Eva Samcová
- Third Faculty of Medicine; Institute of Biochemistry; Cell and Molecular Biology; Charles University in Prague; Czech Republic
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20
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Xiang LW, Li J, Lin JM, Li HF. Determination of gouty arthritis' biomarkers in human urine using reversed-phase high-performance liquid chromatography. J Pharm Anal 2013; 4:153-158. [PMID: 29403877 PMCID: PMC5761083 DOI: 10.1016/j.jpha.2013.11.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Accepted: 11/30/2013] [Indexed: 11/18/2022] Open
Abstract
Creatinine, uric acid, hypoxanthine and xanthine are important diagnostic biomarkers in human urine for gouty arthritis or renal disease diacrisis. A simple method for simultaneous determination of these biomarkers in urine based on reversed-phase high-performance liquid chromatography (RP-HPLC) with ultraviolet (UV) detector was proposed. After pretreatment by dilution, centrifugation and filtration, the biomarkers in urine samples were separated by ODS-BP column by elution with methanol/50 mM NaH2PO4 buffer solution at pH 5.26 (5:95). Good linearity between peak areas and concentrations of standards was obtained for the biomarkers with correlation coefficients in the range of 0.9957–0.9993. The proposed analytical method has satisfactory repeatability (the recovery of data in a range of creatinine, uric acid, hypoxanthine and xanthine was 93.49–97.90%, 95.38–96.45%, 112.46–115.78% and 90.82–97.13% with standard deviation of <5%, respectively) and the limits of detection (LODs, S/N≥3) for creatinine, uric acid, hypoxanthine, and xanthine were 0.010, 0.025, 0.050 and 0.025 mg/L, respectively. The established method was proved to be simple, accurate, sensitive and reliable for the quantitation of gouty arthritis' biomarkers in human urine samples. The ratio of creatinine to uric acid was found to be a possible factor for assessment of gouty arthritis.
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Affiliation(s)
- Lei-Wen Xiang
- Beijing Key Laboratory of Microanalysis Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China
- Institute of Food and Fermentation Industries, Fuqing Branch of Fujian Normal University, Fuqing 350300, China
| | - Jing Li
- Beijing Key Laboratory of Microanalysis Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Jin-Ming Lin
- Beijing Key Laboratory of Microanalysis Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Hai-Fang Li
- Beijing Key Laboratory of Microanalysis Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China
- Corresponding author. Tel./fax: +86 10 62797463.
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21
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Miura C, Funaya N, Matsunaga H, Haginaka J. Monodisperse, molecularly imprinted polymers for creatinine by modified precipitation polymerization and their applications to creatinine assays for human serum and urine. J Pharm Biomed Anal 2013; 85:288-94. [DOI: 10.1016/j.jpba.2013.07.038] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 07/27/2013] [Accepted: 07/29/2013] [Indexed: 11/26/2022]
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22
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Ferraro V, Ferreira Jorge R, Cruz IB, Antunes F, Sarmento B, Castro PML, Pintado ME. In vitrointestinal absorption of amino acid mixtures extracted from codfish (Gadus morhuaL.) salting wastewater. Int J Food Sci Technol 2013. [DOI: 10.1111/ijfs.12269] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Vincenza Ferraro
- CBQF - Centro de Biotecnologia e Química Fina; Escola Superior de Biotecnologia; Universidade Católica Portuguesa; Rua Dr. António Bernardino de Almeida Porto 4200-072 Portugal
- WeDoTech - Companhia de Ideias e Tecnologias, Lda./CiDEB; Escola Superior de Biotecnologia; Universidade Católica Portuguesa; Rua Dr. António Bernardino de Almeida Porto 4200-072 Portugal
| | - Ruben Ferreira Jorge
- WeDoTech - Companhia de Ideias e Tecnologias, Lda./CiDEB; Escola Superior de Biotecnologia; Universidade Católica Portuguesa; Rua Dr. António Bernardino de Almeida Porto 4200-072 Portugal
| | - Isabel B. Cruz
- CBQF - Centro de Biotecnologia e Química Fina; Escola Superior de Biotecnologia; Universidade Católica Portuguesa; Rua Dr. António Bernardino de Almeida Porto 4200-072 Portugal
- WeDoTech - Companhia de Ideias e Tecnologias, Lda./CiDEB; Escola Superior de Biotecnologia; Universidade Católica Portuguesa; Rua Dr. António Bernardino de Almeida Porto 4200-072 Portugal
| | - Filipa Antunes
- INEB-Instituto de Engenharia Biomédica; NEWTherapiesGroup; Universidade do Porto; Rua do Campo Alegre 823 Porto 4050-048 Portugal
| | - Bruno Sarmento
- INEB-Instituto de Engenharia Biomédica; NEWTherapiesGroup; Universidade do Porto; Rua do Campo Alegre 823 Porto 4050-048 Portugal
- CICS; HealthSciences Research Center; Instituto Superior de Ciências da Saúde Norte; Rua Central de Gandra 1317 4585-116 Gandra Portugal
| | - Paula M. L. Castro
- CBQF - Centro de Biotecnologia e Química Fina; Escola Superior de Biotecnologia; Universidade Católica Portuguesa; Rua Dr. António Bernardino de Almeida Porto 4200-072 Portugal
| | - Manuela E. Pintado
- CBQF - Centro de Biotecnologia e Química Fina; Escola Superior de Biotecnologia; Universidade Católica Portuguesa; Rua Dr. António Bernardino de Almeida Porto 4200-072 Portugal
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23
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Garbati P, Salis A, Adriano E, Galatini A, Damonte G, Balestrino M, Millo E. A new method to synthesize creatine derivatives. Amino Acids 2013; 45:821-33. [PMID: 23744400 DOI: 10.1007/s00726-013-1525-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Accepted: 05/23/2013] [Indexed: 12/16/2022]
Abstract
Creatine is an amino acid that has a pivotal role in energy metabolism of cells. Creatine acts as an "ATP shuttle", carrying ATP to the sites where it is utilized, through its reversible phosphorylation by creatine kinase. Moreover, the creatine-phosphocreatine system delays ATP depletion during anoxia or ischemia, thus exerting a neuroprotective role during those pathological conditions. Thus, its administration has been advocated as a treatment or prevention of several conditions involving the central nervous system. However, creatine crosses poorly the blood-brain barrier and the cell plasma membrane, thus its administration has but a limited effect. The use of more lipophilic creatine derivatives has thus been suggested. However, such a synthesis is complicated by the intrinsic characteristics of the creatine molecule that hardly reacts with other molecules and easily cyclizes to creatinine. We obtained amide derivatives from creatine starting from a new protected creatine molecule synthesized by us, the so-called (Boc)2-creatine. We used a temporary protection only on the creatine guanidine group while allowing a good reactivity on the carboxylic group. This temporary protection ensured efficient creatine dissolution in organic solvents and offered simultaneous protection of creatine toward intramolecular cyclization to creatinine. In this manner, it was possible to selectively conjugate molecules on the carboxylic group. The creatine guanidine group was easily released from the protection at the end of the reaction, thus obtaining the desired creatine derivative.
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Affiliation(s)
- Patrizia Garbati
- Department of Neuroscience, Ophthalmology, Genetics, Maternal-Infantile Sciences, University of Genova, Largo Paolo Daneo 3, 16132, Genoa, Italy
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24
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Koop DR, Bleyle LA, Munar M, Cherala G, Al-Uzri A. Analysis of tacrolimus and creatinine from a single dried blood spot using liquid chromatography tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 926:54-61. [PMID: 23548676 PMCID: PMC4160148 DOI: 10.1016/j.jchromb.2013.02.035] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 01/28/2013] [Accepted: 02/25/2013] [Indexed: 11/29/2022]
Abstract
Long term therapeutic drug monitoring and assessment of renal function are required in renal transplant recipients on immunosuppressant therapy such as tacrolimus. Dry blood spots (DBS) have been used successfully in the clinic for many years and offers a convenient, simple and non-invasive method for repeated blood tests. We developed and performed a preliminary validation of a method for the analysis of tacrolimus and creatinine from a single DBS using liquid chromatography-tandem mass spectrometric (LC-MS/MS). Tacrolimus and creatinine were extracted from a 6mm punch with a mixture of methanol/acetonitrile containing ascomycin and deuterated creatinine as internal standards. A 10 μl aliquot of the extract was analyzed directly after dilution for creatinine with normal phase high performance liquid chromatography and multiple reaction monitoring. The remainder of the extract was processed and analyzed for tacrolimus. The lower limit of quantification for tacrolimus was 1 ng/ml with accuracy of 0.34% bias and precision (CV) of 11.1%. The precision ranged from 1.33% to 7.68% and accuracy from -4.44% to 11.6% bias for the intra- and inter-day analysis. The lower limit of quantification of creatinine was 0.01 mg/dL with precision of 7.94%. Accuracy was based on recovery of additional creatinine spiked into whole blood samples and ranged from -2.45% bias at 5 mg/dL to 3.75% bias at 0.5 mg/dL. Intra- and inter-day precision was from 3.48 to 4.11%. The assay was further validated with DBS prepared from pediatric renal transplant recipients. There was excellent correlation between the levels of tacrolimus and creatinine obtained from the clinical laboratory and the DBS method developed. After additional validation, this assay may have a significant impact on compliance with medication intake as well as potentially lowering the cost associated with intravenous blood draws in clinical laboratories.
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Affiliation(s)
- Dennis R Koop
- Department of Physiology and Pharmacology and Bioanalytical Shared Resource/Pharmacokinetics Core, Oregon Health and Science University, Portland, OR 97239, USA.
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25
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Burgard DA, Fuller R, Becker B, Ferrell R, Dinglasan-Panlilio MJ. Potential trends in Attention Deficit Hyperactivity Disorder (ADHD) drug use on a college campus: wastewater analysis of amphetamine and ritalinic acid. THE SCIENCE OF THE TOTAL ENVIRONMENT 2013; 450-451:242-249. [PMID: 23500822 DOI: 10.1016/j.scitotenv.2013.02.020] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 02/08/2013] [Accepted: 02/08/2013] [Indexed: 06/01/2023]
Abstract
Attention Deficit Hyperactivity Disorder (ADHD) medication use is on the rise in the United States. The most widely used ADHD medications are the amphetamine-type compounds Adderall (mixed amphetamine salts) and Ritalin (methylphenidate). According to survey data ADHD medications are used as a study drug or "Smart Drug" by students without a prescription on college campuses. Survey data of non-prescribed drug use has limitations with accurate reporting and no empirical data of usage exists in the literature. This study looks for trends in the use of these drugs on a college campus among low-stress and high stress periods. The metabolites of these two drugs, amphetamine and ritalinic acid, are quantified in campus wastewater using solid phase extraction (SPE) and liquid chromatography-tandem mass spectrometry (LC-MS/MS). Trends show a possible increase in amphetamine levels during periods of high stress such as midterms, the last week of classes and finals week over levels from the baseline low stress weeks such as the first week of classes. Both semesters from the 2011-12 academic year were studied and the highest increase over baseline (760%) occurred during finals week of the second semester. Ritalinic acid levels gradually climbed first semester but had no obvious periodic trend second semester.
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Affiliation(s)
- Daniel A Burgard
- Department of Chemistry, University of Puget Sound, Tacoma, WA 98416, USA.
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26
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Kaçar C, Erden PE, Pekyardimci Ş, Kiliç E. An Fe3O4-nanoparticles-based amperometric biosensor for creatine determination. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2012; 41:2-7. [DOI: 10.3109/10731199.2012.712044] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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27
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Yadav S, Kumar A, Pundir C. Amperometric creatinine biosensor based on covalently coimmobilized enzymes onto carboxylated multiwalled carbon nanotubes/polyaniline composite film. Anal Biochem 2011; 419:277-83. [DOI: 10.1016/j.ab.2011.07.032] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 07/20/2011] [Accepted: 07/25/2011] [Indexed: 11/25/2022]
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28
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Zhao J, Chen H, Ni P, Xu B, Luo X, Zhan Y, Gao P, Zhu D. Simultaneous determination of urinary tryptophan, tryptophan-related metabolites and creatinine by high performance liquid chromatography with ultraviolet and fluorimetric detection. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:2720-5. [DOI: 10.1016/j.jchromb.2011.07.035] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 07/25/2011] [Accepted: 07/25/2011] [Indexed: 10/17/2022]
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29
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Hülsemann F, Flenker U, Parr M, Geyer H, Schänzer W. Authenticity control and identification of origin of synthetic creatine-monohydrate by isotope ratio mass spectrometry. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.09.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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30
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Characterisation of high added value compounds in wastewater throughout the salting process of codfish (Gadus morhua). Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.07.090] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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31
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Pereira L. Porous Graphitic Carbon as a Stationary Phase in HPLC: Theory and Applications. J LIQ CHROMATOGR R T 2010. [DOI: 10.1080/10826070802126429] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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32
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GC-MS determination of creatinine in human biological fluids as pentafluorobenzyl derivative in clinical studies and biomonitoring: Inter-laboratory comparison in urine with Jaffé, HPLC and enzymatic assays. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:2582-92. [PMID: 20462809 DOI: 10.1016/j.jchromb.2010.04.025] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2009] [Revised: 04/15/2010] [Accepted: 04/16/2010] [Indexed: 11/22/2022]
Abstract
In consideration of its relatively constant urinary excretion rate, creatinine in urine is a useful biochemical parameter to correct the urinary excretion rate of endogenous and exogenous biomolecules. Assays based on the reaction of creatinine and picric acid first reported by Jaffé in 1886 still belong to the most frequently used laboratory approaches for creatinine measurement in urine. Further analytical methods for creatinine include HPLC-UV, GC-MS, and LC-MS and LC-MS/MS approaches. In the present article we report on the development, validation and biomedical application of a new GC-MS method for the reliable quantitative determination of creatinine in human urine, plasma and serum. This method is based on the derivatization of creatinine (d(0)-Crea) and the internal standard [methyl-trideutero]creatinine (d(3)-Crea) with pentafluorobenzyl (PFB) bromide in the biological sample directly or after dilution with phosphate buffered saline, extraction of the reaction products with toluene and quantification in 1-μl aliquots of the toluene extract by selected-ion monitoring of m/z 112 for d(0)-Crea-PFB and m/z 115 for d(3)-Crea-PFB in the electron-capture negative-ion chemical ionization mode. The limit of detection of the method is 100 amol of creatinine. In an inter-laboratory study on urine samples from 100 healthy subjects, the GC-MS method was used to test the reliability of currently used Jaffé, enzymatic and HPLC assays in clinical and occupational studies. The results of the inter-laboratory study indicate that all three tested methods allow for satisfactory quantification of creatinine in human urine. The GC-MS method is suitable for use as a reference method for urinary creatinine in humans. In serum, creatine was found to contribute to creatinine up to 20% when measured by the present GC-MS method. The application of the GC-MS method can be extended to other biological samples such as saliva.
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Modification of Jaffe's kinetic method decreases bilirubin interference: A preliminary report. Indian J Clin Biochem 2010; 25:64-6. [PMID: 23105886 DOI: 10.1007/s12291-010-0013-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The negative interference of bilirubin on serum creatinine determined by the kinetic alkaline picrate (Jaffe) reaction is the unresolved problem. Though high performance liquid chromatography and gas chromatography with mass spectroscopy have been proposed to be gold standards for creatinine estimation but they are not readily available in most of the clinical chemistry laboratories due to economic and technical constraints. Most of the present day analyzers use Jaffe's kinetic method without deproteinization. Though enzymatic methods are now routinely used as most accurate method but they are not acceptable due to cost constraints. Hence this study was planned to find out a possible solution to the problem of bilirubin interference by a minor modification in the commonly used Jaffe method so that it is amenable for use on the currently used analyzers.
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Rapid and direct determination of creatinine in urine using capillary zone electrophoresis. Clin Chim Acta 2009; 409:52-5. [DOI: 10.1016/j.cca.2009.08.015] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 08/14/2009] [Accepted: 08/23/2009] [Indexed: 10/20/2022]
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35
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Transient alterations of creatine, creatine phosphate, N-acetylaspartate and high-energy phosphates after mild traumatic brain injury in the rat. Mol Cell Biochem 2009; 333:269-77. [PMID: 19688182 DOI: 10.1007/s11010-009-0228-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2009] [Accepted: 08/06/2009] [Indexed: 10/20/2022]
Abstract
In this study, the concentrations of creatine (Cr), creatine phosphate (CrP), N-acetylaspartate (NAA), ATP, ADP and phosphatidylcholine (PC) were measured at different time intervals after mild traumatic brain injury (mTBI) in whole brain homogenates of rats. Anaesthetized animals underwent to the closed-head impact acceleration "weight-drop" model (450 g delivered from 1 m height = mild traumatic brain injury) and were killed at 2, 6, 24, 48 and 120 h after the insult (n = 6 for each time point). Sham-operated rats (n = 6) were used as controls. Compounds of interest were synchronously measured by HPLC in organic solvent deproteinized whole brain homogenates. A reversible decrease of all metabolites but PC was observed, with minimal values recorded at 24 h post-injury (minimum of CrP = 48 h after impact). In particular, Cr and NAA showed a decrease of 44.5 and 29.5%, respectively, at this time point. When measuring NAA in relation to other metabolites, as it is commonly carried out in "in vivo" (1)H-magnetic resonance spectroscopy ((1)H-MRS), an increase in the NAA/Cr ratio and a decrease in the NAA/PC ratio was observed. Besides confirming a transient alteration of NAA homeostasis and ATP imbalance, our results clearly show significant changes in the cerebral concentration of Cr and CrP after mTBI. This suggests a careful use of the NAA/Cr ratio to measure NAA by (1)H-MRS in conditions of altered cerebral energy metabolism. Viceversa, the NAA/PC ratio appears to be a better indicator of actual NAA levels during energy metabolism impairment. Furthermore, our data suggest that, under pathological conditions affecting the brain energetic, the Cr-CrP system is not a suitable tool to buffer possible ATP depletion in the brain, thus supporting the growing indications for alternative roles of cerebral Cr.
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Karakuş E, Erden PE, Pekyardimci S, Kiliç E. Determination of Creatine in Commercial Creatine Powder with New Potentiometric and Amperometric Biosensors. ACTA ACUST UNITED AC 2009; 34:337-47. [PMID: 16809134 DOI: 10.1080/10731190600683985] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
New potentiometric and amperometric biosensors were developed for the determination of creatine. The potentiometric creatine biosensor was prepared by immobilizing urease and creatinase on poly(vinylchloride) (PVC) ammonium membrane electrode containing palmitic acid prepared by using nonactine as an ammonium-ionophore. The linear working range of the biosensor was 1.0 x 10(-5) - 1.0 x 10(-3) M and the response time was about 60 s. The optimum pH, temperature, and buffer concentration were found to be 7.0, 20 degrees C, and 5 mM, respectively. The slope of the electrode was 49.2 mV/p[creatine]. The storage stabilization of the biosensor was investigated and 40-45% decrease in the response was detected after 2 months. The amperometric creatine biosensor was prepared by immobilizing creatinase (CI) and sarcosine oxidase (SO) in a poly(vinylferrocenium) matrix onto the surface of a platinum working electrode by crosslinking with glutaraldehyde (GA) and bovine serum albumine (BSA). Determination of creatine was performed by the oxidation of enzymatically generated H2O2 at +0.7 V vs. Ag/AgCl. The linear working range of the biosensor was 2.0 x 10(-5) - 3.2 x 10(-4) M and the response time was about 50 s. The effects of pH, temperature, enzyme ratio and buffer concentration were investigated and optimum parameters were found to be 7.5, 37 degrees C, 2.5:1 (CI:SO) and 0.05 M, respectively. The determination of creatine in commercial creatine powder was successfully carried out with these creatine biosensors by using the standard addition and calibration curve methods. The results were in good agreement with those obtained from Jaffé method at 95% confidence level.
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Affiliation(s)
- Emine Karakuş
- Department of Chemistry, Faculty of Science, Ankara University, Ankara, Turkey.
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37
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Erden PE, Pekyardimci S, Kiliç E, Arslan F. An Amperometric Enzyme Electrode for Creatine Determination Prepared by the Immobilization of Creatinase and Sarcosine Oxidase in Poly(vinylferrocenium). ACTA ACUST UNITED AC 2009; 34:223-39. [PMID: 16537176 DOI: 10.1080/10731190600581775] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
A new enzyme electrode for the determination of creatine was developed by immobilizing creatinase (CI) and sarcosine oxidase (SO). The enzymes were co-immobilized in a poly(vinylferrocenium) matrix onto the surface of a platinum working electrode. Crosslinking with glutaraldehyte (GA) and bovine serum albumin (BSA) was selected as the best immobilization method for the enzymatic system. Determination of creatine was performed by the oxidation of enzymatically generated H2O2 at + 0.7 V vs. Ag/AgCl. The linear working range of the electrode was 2.0 x 10(-5) - 3.2 x 10(-4) M and the response time was about 50 s. The effects of pH, temperature, enzyme ratio and buffer concentration were investigated and optimum parameters were found to be 7.5, 37 degrees C, 2.5:1 (CI:SO) and 0.05 M, respectively. The stability and reproducibility of the enzyme electrode have been also studied.
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Affiliation(s)
- Pinar Esra Erden
- Department of Chemistry, Faculty of Science, Ankara University, Ankara, Turkey
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38
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Chang YS, Ko TH, Hsu TJ, Syu MJ. Synthesis of an Imprinted Hybrid Organic−Inorganic Polymeric Sol−Gel Matrix Toward the Specific Binding and Isotherm Kinetics Investigation of Creatinine. Anal Chem 2009; 81:2098-105. [DOI: 10.1021/ac802168w] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Yong-Sheun Chang
- Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan 70101
| | - Ting-Hsien Ko
- Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan 70101
| | - Ting-Jung Hsu
- Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan 70101
| | - Mei-Jywan Syu
- Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan 70101
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39
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García-Pérez I, Vallejo M, García A, Legido-Quigley C, Barbas C. Metabolic fingerprinting with capillary electrophoresis. J Chromatogr A 2008; 1204:130-9. [DOI: 10.1016/j.chroma.2008.07.025] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Revised: 07/01/2008] [Accepted: 07/08/2008] [Indexed: 10/21/2022]
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40
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Liquid chromatography-tandem mass spectrometric quantification of the dehydration product of tetranor PGE-M, the major urinary metabolite of prostaglandin E(2) in human urine. J Chromatogr B Analyt Technol Biomed Life Sci 2008; 871:72-7. [PMID: 18632314 DOI: 10.1016/j.jchromb.2008.06.042] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2008] [Revised: 05/28/2008] [Accepted: 06/23/2008] [Indexed: 10/21/2022]
Abstract
A LC-MS/MS method has been developed to analyze tetranor PGE-M, the major urinary metabolite of PGE(2), that involves the acid-catalyzed dehydration of tetranor PGE-M and its deuterated (d(6)) analog followed by LC-MS/MS measurement of the dehydrated tetranor PGE-M product (tetranor PGA-M). We also report a method for quantification of creatinine in urine by LC-MS/MS to normalize tetranor PGE-M concentrations with that of urinary creatinine. These methods were used to study the effect of aspirin on urinary tetranor PGE-M levels in healthy male volunteers. Aspirin did not affect urinary creatinine concentrations but decreased urinary tetranor PGE-M concentrations by approximately 44%.
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41
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Costa ACO, da Costa JL, Tonin FG, Tavares MF, Micke GA. Development of a fast capillary electrophoresis method for determination of creatinine in urine samples. J Chromatogr A 2007; 1171:140-3. [DOI: 10.1016/j.chroma.2007.09.029] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2007] [Revised: 09/12/2007] [Accepted: 09/13/2007] [Indexed: 11/28/2022]
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42
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Sharma PS, Lakshmi D, Prasad BB. Molecularly imprinted solid-phase extraction combined with molecularly imprinted polymer-sensor: a diagnostic tool applicable to creatine deficiency syndrome. Biomed Chromatogr 2007; 21:976-86. [PMID: 17472218 DOI: 10.1002/bmc.842] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Primary creatine deficiency syndromes (CDS) are a new group of disorders caused by guanidinoacetate methyltransferase (GAMT) deficiency, which affects endogenous creatine biosynthesis with depletion of body creatine. A deficiency in creatine can be corrected by treatment with oral creatine supplementation and this necessitates a simple and sensitive screening method for early detection of creatine in dilute physiologic fluids. In this work an artificial receptor, molecularly imprinted polymer (MIP), for creatine was used both as a material for solid-phase extraction (SPE) and as a sensing element in a voltammetric sensor. Using the combination of molecularly imprinted solid-phase extraction (MISPE) with a complementary MIP sensor, the minimum detectable amount was found to be 0.0015 ng mL(-1) (RSD = 1.3%, S/N = 3). The MISPE-MIP sensor combination provided up to 60-fold preconcentration, which was more than sufficient for achieving the required quantification limit 50 ng mL(-1) (or 0.0025 ng mL(-1) after 2 x 10(4)-fold dilution) for creatine in human blood serum.
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Affiliation(s)
- Piyush Sindhu Sharma
- Analytical Division, Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India
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43
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Various instrumental and biochemical parameters as ageing indicators of beef Longissimus dorsi muscle and their relation to creatine and creatinine content. Eur Food Res Technol 2006. [DOI: 10.1007/s00217-006-0491-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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44
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Karakuş E, Pekyardımcı Ş, Kılıç E. Potentiometric bienzymatic biosensor based on PVC membrane containing palmitic acid for determination of creatine. Process Biochem 2006. [DOI: 10.1016/j.procbio.2006.01.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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45
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Yokoyama Y, Tsuji S, Sato H. Simultaneous determination of creatinine, creatine, and UV-absorbing amino acids using dual-mode gradient low-capacity cation-exchange chromatography. J Chromatogr A 2005; 1085:110-6. [PMID: 16106856 DOI: 10.1016/j.chroma.2005.01.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A simple and versatile cation-exchange chromatography technique for the simultaneous determination of urinary creatinine (Cre), creatine (Crn), methionine (Met), tyrosine (Tyr), phenylalanine (Phe), histidine (His), and tryptophan (Trp) was developed. A novel low-capacity cation-exchange column packed with a newly developed sulfoacylated hypercross-linked macroreticular polystyrene-divinylbenzene resin, referred to as TMR-A/75 (capacity: 75 microequiv/column), was successfully used with a binary dual-mode gradient eluting system. Two solvents, (A) 25 mM phosphoric acid-methanol (30:70, v/v) and (B) 25 mM disodium hydrogenphosphate-methanol (30:70, v/v) were pumped through the column by programming solvent delivery ratios as 0 to 5 min: A-B (55:45, pH 3.6); 5-21 min: A-B (49:51, pH 5.3); and 21-35 min: A-B (55:45, pH 3.6). The flow rate was simultaneously time-programmed to be 0.6 mL/min from 0 to 19 min and to be 1.0 mL/min from 19 to 35 min. This eluting system could permit the use of the UV detection at 210 nm. The analytes, Crn, Met, Tyr, His, Cre, Phe, and Trp, were well separated in this order in 27 min with minimum resolution of approximately 2, and the cycle time was about 35 min. Retention time of each analyte was very reproducible with relative standard deviations (RSDs) between 0.05 and 0.38% (n = 5). The peak area responses were also reproducible with RSDs between 0.74 and 2.24% (n = 5). Calibration lines based on area data were linear from 1 to 1000 microM with r2 values of 0.9998 (Crn), 0.9998 (Met), 0.9999 (Tyr), 0.9999 (His), 1.0000 (Cre), 1.0000 (Phe), and 0.9999 (Trp). The method was applicable to the screening and/or chemical diagnosis of inherited metabolic disorders such as phenylketonuria (PKU), tyrosinemia, and Lowe syndrome. The creatinine ratios of diagnostic markers (microM/microM Cre) were easily determined. The Phe/Cre ratios for five urines from patients with PKU ranged from 0.162 to 0.521, and the Tyr/Cre ratio for tyrosinemia was 0.147. The ratios of Tyr/Cre, Phe/Cre, and Trp/Cre for Lowe syndrome were 0.497, 0.321, and 0.495, respectively. In contrast, the creatinine ratios for healthy newborns showed one digit lower than those for patients did. The developed method is very practical and can provide useful information and results for the clinical or biomedical researches with low analytical run costs.
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Affiliation(s)
- Yukio Yokoyama
- Department of Analytical Chemistry, Faculty of Engineering, Yokohama National University, Tokiwadai, Hodogaya, Yokohama 240-8501, Japan.
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46
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Tsai HA, Syu MJ. Synthesis and characterization of creatinine imprinted poly(4-vinylpyridine-co-divinylbenzene) as a specific recognition receptor. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2005.03.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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47
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Tsai HA, Syu MJ. Synthesis of creatinine-imprinted poly(β-cyclodextrin) for the specific binding of creatinine. Biomaterials 2005; 26:2759-66. [PMID: 15585280 DOI: 10.1016/j.biomaterials.2004.07.037] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2004] [Accepted: 07/20/2004] [Indexed: 11/25/2022]
Abstract
An artificial receptor for creatinine was synthesized by the method of molecularly imprinted polymer (MIP). beta-Cyclodextrin was used as a monomer cross-linked with epichlorohydrin in the presence of creatinine, which was a template for the imprinting. Different molar ratios of monomer to template were used to synthesize the polymers so that better specific adsorption ability towards creatinine could be achieved. The results showed that to carry out the polymerization with a molar ratio of monomer to template of 3:2 and monomer to cross-linking agent of 1:10 was proper. N-hydroxysuccinimide and 2-pyrrolinidone were used as the analogues of creatinine in the adsorption experiments of multi-component solutions to reveal the specific recognition ability of the molecularly imprinted poly(beta-cyclodextrin) (poly(beta-CD)) for the template molecule, creatinine. One such detection interference of creatinine was creatine, which also co-exists in serum. Hence, adsorption experiments of creatinine/creatine binary mixture were also carried out to investigate and confirm the specific binding of the creatinine-imprinted poly(beta-cyclodextrin) towards creatinine. The hydroxyl groups of the imprinted poly(beta-CD) was further capped by chlorotrimethylsilane (CTMS) to investigate the interaction between creatinine and the imprinted poly(beta-CD). The adsorption resulting from the mixture solution by MIPs suggested that the creatinine-imprinted poly(beta-CD) demonstrated superior binding effect for the target molecule, creatinine, rather than creatine, N-hydroxysuccinimide and 2-pyrrolinidone.
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Affiliation(s)
- Hsuan-Ang Tsai
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
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48
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Zinellu A, Caria MA, Tavera C, Sotgia S, Chessa R, Deiana L, Carru C. Plasma creatinine and creatine quantification by capillary electrophoresis diode array detector. Anal Biochem 2005; 342:186-93. [PMID: 15927140 DOI: 10.1016/j.ab.2005.01.045] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2004] [Revised: 01/24/2005] [Accepted: 01/26/2005] [Indexed: 11/18/2022]
Abstract
Traditional clinical assays for nonprotein nitrogen compounds, such as creatine and creatinine, have focused on the use of enzymes or chemical reactions that allow measurement of each analyte separately. Most of these assays are mainly directed to urine quantification, so that their applicability on plasma samples is frequently hard to perform. This work describes a simple free zone capillary electrophoresis method for the simultaneous measurement of creatinine and creatine in human plasma. The effect of analytical parameters such as concentration and pH of Tris-phosphate running buffer and cartridge temperature on resolution, migration times, peak areas, and efficiency was investigated. Good separation was achieved using a 60.2-cm x 75-microm uncoated silica capillary, 75 mmol/L Tris-phosphate buffer, pH 2.25, at 15 degrees C, in less than 8 min. We compared the present method to a validated capillary electrophoresis assay, by measuring plasma creatinine in 120 normal subjects. The obtained data were compared by the Passing-Bablok regression and the Bland-Altman test. Moreover the performance of the developed method was assessed by measuring creatine and creatinine in 16 volunteers prior to and after a moderate physical exercise.
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Affiliation(s)
- Angelo Zinellu
- Chair of Clinical Biochemistry, University of Sassari, Viale San Pietro 43/B, I-07100 Sassari, Italy
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49
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Yokoyama Y, Yamasaki K, Sato H. Simultaneous determination of urinary creatinine and UV-absorbing amino acids using a novel low-capacity cation-exchange chromatography for the screening of inborn errors of metabolism. J Chromatogr B Analyt Technol Biomed Life Sci 2005; 816:333-8. [PMID: 15664367 DOI: 10.1016/j.jchromb.2004.11.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2004] [Accepted: 11/22/2004] [Indexed: 10/26/2022]
Abstract
A simple and versatile low-capacity cation-exchange chromatography system for the simultaneous determination of creatinine and UV-absorbing amino acids was developed. The separation column was packed with a newly developed low-capacity sulfoacylated macro-porous polystyrene-divinylbenzene resin selective for amino-acid cations. Urinary creatinine, creatine, tyrosine, histidine, phenylalanine, and tryptophan were simultaneously separated and determined by an isocratic elution with phosphate/acetonitrile eluent in 25 min. Relative standard deviations (R.S.D.) of the retention times for the analytes were between 0.28 and 1.06%. R.S.D. of peak area responses for the analytes were between 0.75 and 3.51%. The r(2) values for the calibration lines were between 0.9994 and 0.9999. The method could provide the creatinine ratios for the analytes, and was applicable to the screening and/or chemical diagnosis of several inherited disorders of amino-acid metabolism such as phenylketonuria (PKU).
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Affiliation(s)
- Yukio Yokoyama
- Department of Analytical Chemistry, Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
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50
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Affiliation(s)
- Dimitrios Tsikas
- Institute of Clinical Pharmacology, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany.
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