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Ferrão AR, Pestana P, Borges L, Palmeira-de-Oliveira R, Palmeira-de-Oliveira A, Martinez-de-Oliveira J. Quantification of Ions in Human Urine-A Review for Clinical Laboratories. Biomedicines 2024; 12:1848. [PMID: 39200312 PMCID: PMC11351741 DOI: 10.3390/biomedicines12081848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2024] [Revised: 07/31/2024] [Accepted: 08/08/2024] [Indexed: 09/02/2024] Open
Abstract
Urine is an organic fluid produced by the kidney, and its analysis is one of the most requested laboratory tests by clinicians. The ionic composition of urine has been shown to be a good health indicator: it is useful for the diagnosis of several diseases, as well as monitoring therapeutics. This review considers laboratorial techniques that have been used throughout time for the quantification of ions in urine, and also considers some methodologies that can potentially be used in clinical laboratories for this kind of analysis. Those methods include gravimetry, titration, flame emission spectrophotometry (flame photometry), fluorimetry, potentiometry (ion selective electrodes), ion chromatography, electrophoresis, kinetic colorimetric tests, enzymatic colorimetric tests, flow cytometry, atomic absorption, plasma atomic emission spectrometry, and paper-based devices. Sodium, potassium, chloride, calcium, and magnesium are among the most important physiological ions, and their determination is frequently requested in hospitals. There have been many advances regarding the analysis of these ions in 24 h urine. However, there is still some way to go concerning the importance of intracellular ions in this type of sample as well as the use of occasional urine for monitoring these parameters.
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Affiliation(s)
- Ana Rita Ferrão
- Centro Hospitalar Universitário Cova da Beira, EPE, 6200 Covilhã, Portugal;
- Health Sciences Research Centre, Universidade da Beira Interior, 6201 Covilhã, Portugal; (A.P.-d.-O.); (J.M.-d.-O.)
| | - Paula Pestana
- Centro Hospitalar Universitário Cova da Beira, EPE, 6200 Covilhã, Portugal;
- Health Sciences Research Centre, Universidade da Beira Interior, 6201 Covilhã, Portugal; (A.P.-d.-O.); (J.M.-d.-O.)
| | - Lígia Borges
- Labfit-HPRD, 6200 Covilhã, Portugal; (L.B.); (R.P.-d.-O.)
| | | | - Ana Palmeira-de-Oliveira
- Health Sciences Research Centre, Universidade da Beira Interior, 6201 Covilhã, Portugal; (A.P.-d.-O.); (J.M.-d.-O.)
- Labfit-HPRD, 6200 Covilhã, Portugal; (L.B.); (R.P.-d.-O.)
| | - José Martinez-de-Oliveira
- Health Sciences Research Centre, Universidade da Beira Interior, 6201 Covilhã, Portugal; (A.P.-d.-O.); (J.M.-d.-O.)
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2
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Júnior GS, Comassetto F, Conterno GB, Victor de Souza J, de Souza Ferreira W, Griebeler LB, Oleskovicz N. The effect of intravenous magnesium sulphate infusion on total intravenous anesthesia with propofol in adult dogs: A randomized, blinded trial. Vet Anaesth Analg 2024:S1467-2987(24)00131-4. [PMID: 39181818 DOI: 10.1016/j.vaa.2024.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 07/14/2024] [Accepted: 07/14/2024] [Indexed: 08/27/2024]
Abstract
OBJECTIVE To evaluate cardiopulmonary, arterial blood gas and propofol-sparing effects of magnesium sulfate (MgSO4) constant rate infusion (CRI) in mechanically ventilated dogs maintained under total intravenous anesthesia with propofol. STUDY DESIGN Blinded, randomized, clinical trial. ANIMALS A total of 24 healthy adult dogs. METHODS Dogs were premedicated with intramuscular acepromazine (0.05 mg kg-1) and morphine (0.5 mg kg-1), followed by an intravenous (IV) bolus of saline or MgSO4 (50 mg kg-1 over 15 minutes) and propofol (given to effect to induce anesthesia). Anesthesia was maintained with an IV propofol infusion (beginning at 0.3 mg kg-1 minute-1, adjusted as necessary). Concurrently, one of three IV infusions were administered: GS (0.9% NaCl), GM30 (MgSO4, 30 mg kg-1 hour-1) or GM80 (MgSO4, 80 mg kg-1 hour-1). Propofol induction and maintenance doses were recorded. The following variables were recorded at baseline (T0), after bolus treatment (T1), after beginning mechanical ventilation (T5) and every 15 minutes until the end of the procedure (T15-T120): mean arterial pressure, heart rate, peripheral oxygen saturation, end-tidal partial pressure of CO2, temperature, blood gas variables, indirect calorimetry and extubation time. Values of p < 0.05 were considered significant. RESULTS Propofol induction bolus dose was lower in GM30 (31.2%, p = 0.04) and GM80 (38.9%, p = 0.003) than in GS. The maintenance propofol infusion rate in GM80 was 16.9% lower (p = 0.03), resulting in fewer propofol CRI rescues during the perioperative period. GM30 and GM80 exhibited faster extubation times than GS (46.2%, p = 0.002 and 48.9%, p = 0.001, respectively). CONCLUSIONS AND CLINICAL RELEVANCE Infusion of a 50 mg kg-1 bolus, followed by CRI of MgSO4 (30 and 80 mg kg-1 hour-1), reduces the propofol induction and maintenance (CRI) requirement, maintaining cardiorespiratory stability and reducing the time required to extubation.
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Affiliation(s)
| | - Felipe Comassetto
- Department of Veterinary Medicine, Center for Agro-Veterinary Sciences (CAV), Santa Catarina State University (UDESC), Lages, Santa Catarina, Brazil
| | | | | | - William de Souza Ferreira
- Veterinary Clinical Pathology, São Paulo State University (UNESP/Botucatu), Botucatu, São Paulo, Brazil
| | | | - Nilson Oleskovicz
- Department of Veterinary Medicine, Center for Agro-Veterinary Sciences (CAV), Santa Catarina State University (UDESC), Lages, Santa Catarina, Brazil
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Chapp AD, Nwakama CA, Collins AR, Mermelstein PG, Thomas MJ. Physiological acetic acid concentrations from ethanol metabolism stimulate accumbens shell medium spiny neurons via NMDAR activation in a sex-dependent manner. Neuropsychopharmacology 2024; 49:885-892. [PMID: 37845488 PMCID: PMC10948831 DOI: 10.1038/s41386-023-01752-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 09/05/2023] [Accepted: 10/02/2023] [Indexed: 10/18/2023]
Abstract
Recent studies have implicated the ethanol metabolite, acetic acid, as neuroactive, perhaps even more so than ethanol itself. In this study, we investigated sex-specific metabolism of ethanol (1, 2, and 4 g/kg) to acetic acid in vivo to guide electrophysiology experiments in the accumbens shell (NAcSh), a key node in the mammalian reward circuit. There was a sex-dependent difference in serum acetate production, quantified via ion chromatography only at the lowest dose of ethanol (males > females). Ex vivo electrophysiology recordings of NAcSh medium spiny neurons (MSN) in brain slices demonstrated that physiological concentrations of acetic acid (2 mM and 4 mM) increased NAcSh MSN excitability in both sexes. N-methyl-D-aspartate receptor (NMDAR) antagonists, AP5 and memantine, robustly attenuated the acetic acid-induced increase in excitability. Acetic acid-induced NMDAR-dependent inward currents were greater in females compared to males and were not estrous cycle dependent. These findings suggest a novel NMDAR-dependent mechanism by which the ethanol metabolite, acetic acid, may influence neurophysiological effects in a key reward circuit in the brain from ethanol consumption. Furthermore, these findings also highlight a specific sex-dependent sensitivity in females to acetic acid-NMDAR interactions. This may underlie their more rapid advancement to alcohol use disorder and increased risk of alcohol related neurodegeneration compared to males.
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Affiliation(s)
- Andrew D Chapp
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA
- Medical Discovery Team on Addiction, University of Minnesota, Minneapolis, MN, 55445, USA
| | - Chinonso A Nwakama
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA
- Medical Discovery Team on Addiction, University of Minnesota, Minneapolis, MN, 55445, USA
- Medical Scientist Training Program, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Andréa R Collins
- Department of Psychiatry, University of California San Francisco Fresno, Fresno, CA, 93701, USA
| | - Paul G Mermelstein
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA.
- Medical Discovery Team on Addiction, University of Minnesota, Minneapolis, MN, 55445, USA.
- Center for Neural Circuits in Addiction, University of Minnesota, Minneapolis, MN, 55455, USA.
| | - Mark J Thomas
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA.
- Medical Discovery Team on Addiction, University of Minnesota, Minneapolis, MN, 55445, USA.
- Center for Neural Circuits in Addiction, University of Minnesota, Minneapolis, MN, 55455, USA.
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Chapp AD, Shan Z, Chen QH. Acetic Acid: An Underestimated Metabolite in Ethanol-Induced Changes in Regulating Cardiovascular Function. Antioxidants (Basel) 2024; 13:139. [PMID: 38397737 PMCID: PMC10886048 DOI: 10.3390/antiox13020139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/13/2024] [Accepted: 01/18/2024] [Indexed: 02/25/2024] Open
Abstract
Acetic acid is a bioactive short-chain fatty acid produced in large quantities from ethanol metabolism. In this review, we describe how acetic acid/acetate generates oxidative stress, alters the function of pre-sympathetic neurons, and can potentially influence cardiovascular function in both humans and rodents after ethanol consumption. Our recent findings from in vivo and in vitro studies support the notion that administration of acetic acid/acetate generates oxidative stress and increases sympathetic outflow, leading to alterations in arterial blood pressure. Real-time investigation of how ethanol and acetic acid/acetate modulate neural control of cardiovascular function can be conducted by microinjecting compounds into autonomic control centers of the brain and measuring changes in peripheral sympathetic nerve activity and blood pressure in response to these compounds.
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Affiliation(s)
- Andrew D. Chapp
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA
| | - Zhiying Shan
- Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, MI 49931, USA;
| | - Qing-Hui Chen
- Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, MI 49931, USA;
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5
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Georgiev DD. Evolution of Consciousness. Life (Basel) 2023; 14:48. [PMID: 38255663 PMCID: PMC10817314 DOI: 10.3390/life14010048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 12/01/2023] [Accepted: 12/25/2023] [Indexed: 01/24/2024] Open
Abstract
The natural evolution of consciousness in different animal species mandates that conscious experiences are causally potent in order to confer any advantage in the struggle for survival. Any endeavor to construct a physical theory of consciousness based on emergence within the framework of classical physics, however, leads to causally impotent conscious experiences in direct contradiction to evolutionary theory since epiphenomenal consciousness cannot evolve through natural selection. Here, we review recent theoretical advances in describing sentience and free will as fundamental aspects of reality granted by quantum physical laws. Modern quantum information theory considers quantum states as a physical resource that endows quantum systems with the capacity to perform physical tasks that are classically impossible. Reductive identification of conscious experiences with the quantum information comprised in quantum brain states allows for causally potent consciousness that is capable of performing genuine choices for future courses of physical action. The consequent evolution of brain cortical networks contributes to increased computational power, memory capacity, and cognitive intelligence of the living organisms.
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Affiliation(s)
- Danko D Georgiev
- Institute for Advanced Study, 30 Vasilaki Papadopulu Str., 9010 Varna, Bulgaria
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6
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Kishimoto A, Ohtsubo R, Okada Y, Sugiyama K, Goda H, Yoshikawa T, Kohno M, Fukui K. Elucidation of composition of chlorine compounds in acidic sodium chlorite solution using ion chromatography. PLoS One 2023; 18:e0289534. [PMID: 37561805 PMCID: PMC10414608 DOI: 10.1371/journal.pone.0289534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 07/20/2023] [Indexed: 08/12/2023] Open
Abstract
With the spread of coronavirus infections, the demand for disinfectants, such as a sodium chlorite solution, has increased worldwide. Sodium chlorite solution is a food additive and is used in a wide range of applications. There is evidence that chlorous acid or sodium chlorite is effective against various bacteria, but the actual mechanism is not well understood. One reason for this is that the composition of chlorine-based compounds contained in sodium chlorite solutions has not been clearly elucidated. The composition can vary greatly with pH. In addition, the conventional iodometric titration method, the N,N-diethyl-p-phenylenediamine sulfate (DPD) method and the absorption photometric method cannot clarify the composition. In this study, we attempted to elucidate the composition of a sodium chlorite solution using absorption spectrophotometry and ion chromatography (IC). IC is excellent for qualitative and quantitative analysis of trace ions. Through this, we aimed to develop an evaluation method that allows anyone to easily determine the bactericidal power of sodium chlorite. We found that commercially available sodium chlorite solution is 80% pure, with the remaining 20% potentially containing sodium hypochlorite solution. In addition, when sodium chlorite solution became acidified, its absorption spectrum exhibited a peak at 365 nm. Sodium chlorite solution is normally alkaline, and it cannot be measured by the DPD method, which is only applicable under acidic conditions. The presence of a peak at 365 nm indicates that the acidic sodium chlorite solution contains species with oxidizing power. On the other hand, the IC analysis showed a gradual decrease in chlorite ions in the acidic sodium chlorite solution. These results indicate that chlorite ions may not react with this DPD reagent, and other oxidizing species may be present in the acidic sodium chlorite solution. In summary, when a sodium chlorite solution becomes acidic, chlorine-based oxidizing species produce an absorption peak at 365 nm. Sodium hypochlorite and sodium chlorite solutions have completely different IC peak profiles. Although there are still many problems to be solved, we believe that the use of IC will facilitate the elucidation of the composition of sodium chlorite solution and its sterilization mechanism.
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Affiliation(s)
- Ayuta Kishimoto
- Department of Bioscience and Engineering, Molecular Cell Biology Laboratory, College of System Engineering and Science, Shibaura Institute of Technology, Fukasaku, Minuma-ku, Saitama, Japan
| | - Ryosuke Ohtsubo
- Department of Systems Engineering and Science, Molecular Cell Biology Laboratory, Shibaura Institute of Technology, Graduate School of Engineering and Science, Fukasaku, Minuma-ku, Saitama, Japan
| | - Yuta Okada
- Department of Bioscience and Engineering, Molecular Cell Biology Laboratory, College of System Engineering and Science, Shibaura Institute of Technology, Fukasaku, Minuma-ku, Saitama, Japan
| | - Kenta Sugiyama
- Department of Bioscience and Engineering, Molecular Cell Biology Laboratory, College of System Engineering and Science, Shibaura Institute of Technology, Fukasaku, Minuma-ku, Saitama, Japan
| | | | - Toshikazu Yoshikawa
- Louis Pasteur Center for Medical Research, Tanaka Monzen-cho, Sakyo-ku, Kyoto, Japan
- Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kajii-cho, Kamigyo-ku, Kyoto, Japan
| | - Masahiro Kohno
- Department of Bioscience and Engineering, Molecular Cell Biology Laboratory, College of System Engineering and Science, Shibaura Institute of Technology, Fukasaku, Minuma-ku, Saitama, Japan
- Louis Pasteur Center for Medical Research, Tanaka Monzen-cho, Sakyo-ku, Kyoto, Japan
| | - Koji Fukui
- Department of Bioscience and Engineering, Molecular Cell Biology Laboratory, College of System Engineering and Science, Shibaura Institute of Technology, Fukasaku, Minuma-ku, Saitama, Japan
- Department of Systems Engineering and Science, Molecular Cell Biology Laboratory, Shibaura Institute of Technology, Graduate School of Engineering and Science, Fukasaku, Minuma-ku, Saitama, Japan
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7
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Macpherson AJ, Pachnis V, Prinz M. Boundaries and integration between microbiota, the nervous system, and immunity. Immunity 2023; 56:1712-1726. [PMID: 37557080 DOI: 10.1016/j.immuni.2023.07.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 07/17/2023] [Accepted: 07/17/2023] [Indexed: 08/11/2023]
Abstract
The enteric nervous system is largely autonomous, and the central nervous system is compartmentalized behind the blood-brain barrier. Yet the intestinal microbiota shapes gut function, local and systemic immune responses, and central nervous system functions including cognition and mood. In this review, we address how the gut microbiota can profoundly influence neural and immune networks. Although many of the interactions between these three systems originate in the intestinal mucosa, intestinal function and immunity are modulated by neural pathways that connect the gut and brain. Furthermore, a subset of microbe-derived penetrant molecules enters the brain and regulates central nervous system function. Understanding how these seemingly isolated entities communicate has the potential to open up new avenues for therapies and interventions.
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Affiliation(s)
- Andrew J Macpherson
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
| | - Vassilis Pachnis
- Nervous System Development and Homeostasis Laboratory, The Francis Crick Institute, London, UK
| | - Marco Prinz
- Institute of Neuropathology, University of Freiburg, Faculty of Medicine, Freiburg, Germany; Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
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8
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Chapp AD, Nwakama CA, Mermelstein PG, Thomas MJ. Physiological acetic acid concentrations from ethanol metabolism stimulate accumbens shell neurons via NMDAR activation in a sex-dependent manner. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.05.539592. [PMID: 37205358 PMCID: PMC10187301 DOI: 10.1101/2023.05.05.539592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Recent studies have implicated the ethanol metabolite, acetic acid, as neuroactive, perhaps even more so than ethanol itself. In this study, we investigated sex-specific metabolism of ethanol (1, 2, and 4g/kg) to acetic acid in vivo to guide electrophysiology experiments in the accumbens shell (NAcSh), a key node in the mammalian reward circuit. There was a sex-dependent difference in serum acetate production, quantified via ion chromatography only at the lowest dose of ethanol (males>females). Ex vivo electrophysiology recordings of NAcSh neurons in brain slices demonstrated that physiological concentrations of acetic acid (2 mM and 4 mM) increased NAcSh neuronal excitability in both sexes. N -methyl- D -aspartate receptor (NMDAR) antagonists, AP5, and memantine robustly attenuated the acetic acid-induced increase in excitability. Acetic acid-induced NMDAR-dependent inward currents were greater in females compared to males. These findings suggest a novel NMDAR-dependent mechanism by which the ethanol metabolite, acetic acid, may influence neurophysiological effects in a key reward circuit in the brain.
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9
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Napolitano F, Postiglione L, Mormile I, Barrella V, de Paulis A, Montuori N, Rossi FW. Water from Nitrodi’s Spring Induces Dermal Fibroblast and Keratinocyte Activation, Thus Promoting Wound Repair in the Skin: An In Vitro Study. Int J Mol Sci 2023; 24:ijms24065357. [PMID: 36982430 PMCID: PMC10049109 DOI: 10.3390/ijms24065357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/07/2023] [Accepted: 03/07/2023] [Indexed: 03/17/2023] Open
Abstract
The Romans knew of Nitrodi’s spring on the island of Ischia more than 2000 years ago. Although the health benefits attributed to Nitrodi’s water are numerous, the underlying mechanisms are still not understood. In this study, we aim to analyze the physicochemical properties and biological effects of Nitrodi’s water on human dermal fibroblasts to determine whether the water exerts in vitro effects that could be relevant to skin wound healing. The results obtained from the study indicate that Nitrodi’s water exerts strong promotional effects on dermal fibroblast viability and a significant stimulatory activity on cell migration. Nitrodi’s water induces alpha-SMA expression in dermal fibroblasts, thus promoting their transition to myofibroblast-protein ECM deposition. Furthermore, Nitrodi’s water reduces intracellular reactive oxygen species (ROS), which play an important role in human skin aging and dermal damage. Unsurprisingly, Nitrodi’s water has significant stimulatory effects on the cell proliferation of epidermal keratinocytes and inhibits the basal ROS production but enhances their response to the oxidative stress caused by external stimuli. Our results will contribute to the development of human clinical trials and further in vitro studies to identify inorganic and/or organic compounds responsible for pharmacological effects.
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Affiliation(s)
- Filomena Napolitano
- Department of Translational Medical Sciences, University Federico II, 80131 Naples, Italy; (F.N.); (L.P.); (I.M.); (A.d.P.); (N.M.)
| | - Loredana Postiglione
- Department of Translational Medical Sciences, University Federico II, 80131 Naples, Italy; (F.N.); (L.P.); (I.M.); (A.d.P.); (N.M.)
- Center for Basic and Clinical Immunology Research (CISI), WAO Center of Excellence, University Federico II, 80131 Naples, Italy
| | - Ilaria Mormile
- Department of Translational Medical Sciences, University Federico II, 80131 Naples, Italy; (F.N.); (L.P.); (I.M.); (A.d.P.); (N.M.)
| | | | - Amato de Paulis
- Department of Translational Medical Sciences, University Federico II, 80131 Naples, Italy; (F.N.); (L.P.); (I.M.); (A.d.P.); (N.M.)
- Center for Basic and Clinical Immunology Research (CISI), WAO Center of Excellence, University Federico II, 80131 Naples, Italy
| | - Nunzia Montuori
- Department of Translational Medical Sciences, University Federico II, 80131 Naples, Italy; (F.N.); (L.P.); (I.M.); (A.d.P.); (N.M.)
- Center for Basic and Clinical Immunology Research (CISI), WAO Center of Excellence, University Federico II, 80131 Naples, Italy
| | - Francesca Wanda Rossi
- Department of Translational Medical Sciences, University Federico II, 80131 Naples, Italy; (F.N.); (L.P.); (I.M.); (A.d.P.); (N.M.)
- Center for Basic and Clinical Immunology Research (CISI), WAO Center of Excellence, University Federico II, 80131 Naples, Italy
- Correspondence: ; Tel.: +39-081-746-3175
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Central and peripheral regulations mediated by short-chain fatty acids on energy homeostasis. Transl Res 2022; 248:128-150. [PMID: 35688319 DOI: 10.1016/j.trsl.2022.06.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 05/16/2022] [Accepted: 06/01/2022] [Indexed: 11/24/2022]
Abstract
The human gut microbiota influences obesity, insulin resistance, and the subsequent development of type 2 diabetes (T2D). The gut microbiota digests and ferments nutrients resulting in the production of short-chain fatty acids (SCFAs), which generate various beneficial metabolic effects on energy and glucose homeostasis. However, their roles in the central nervous system (CNS)-mediated outputs on the metabolism have only been minimally studied. Here, we explore what is known and future directions that may be worth exploring in this emerging area. Specifically, we searched studies or data in English by using PubMed, Google Scholar, and the Human Metabolome Database. Studies were filtered by time from 1978 to March 2022. As a result, 195 studies, 53 reviews, 1 website, and 1 book were included. One hundred and sixty-five of 195 studies describe the production and metabolism of SCFAs or the effects of SCFAs on energy homeostasis, glucose balance, and mental diseases through the gut-brain axis or directly by a central pathway. Thirty of 195 studies show that inappropriate metabolism and excessive of SCFAs are metabolically detrimental. Most studies suggest that SCFAs exert beneficial metabolic effects by acting as the energy substrate in the TCA cycle, regulating the hormones related to satiety regulation and insulin secretion, and modulating immune cells and microglia. These functions have been linked with AMPK signaling, GPCRs-dependent pathways, and inhibition of histone deacetylases (HDACs). However, the studies focusing on the central effects of SCFAs are still limited. The mechanisms by which central SCFAs regulate appetite, energy expenditure, and blood glucose during different physiological conditions warrant further investigation.
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Carbon composite thermoplastic electrodes integrated with mini-printed circuit board for wireless detection of calcium ions. ANAL SCI 2022; 38:1233-1243. [PMID: 35861910 DOI: 10.1007/s44211-022-00164-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Accepted: 07/06/2022] [Indexed: 11/01/2022]
Abstract
Here, a smartphone-based portable sensing system is developed for real-time detection of Ca2+ ions in a variety of biofluids. A solid-contact calcium-selective electrode (Ca2+-ISE) consisting of an ion-selective membrane (ISM), carbon black nanomaterial and polystyrene-graphite nanoplatelets as a solid contact was fabricated. The polyvinylchloride (PVC)-based ISM was optimized using different plasticizers and ion-exchangers. Under optimized conditions, the solid contacts were electrochemically characterized by electrochemical impedance spectroscopy (EIS), chronopotentiometric and potentiometric measurements. The Ca2+-ISE showed a Nernst response with a slope of 31.2 ± 0.6 mV/decade in the concentration range from 0.1 M to 10-4 M Ca2+ with a limit of detection (LOD) of 1.0 × 10-5 M. In addition, the ISEs exhibited good selectivity to Ca2+ ions over various interfering electrolytes and metabolites. The Ca2+-ISEs were applied in human urine and, artificial serum and cerebrospinal fluid samples. The ISEs showed good recoveries between 90 and 105%, indicating potential applicability of these electrodes in biological fluids. The portable lab-made potentiometer provides wireless data signaling and transmission to a smartphone and final Ca2+ concentration display due to its customized software. Therefore, the developed smartphone-based sensing platform offers low cost (< $25), rapid, user-friendly detection of Ca2+ especially in resource-limited areas.
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Computer‐Aided Analysis of the Corrosion Inhibition by Carbon‐Based Thin‐Film Coating on Vascular Bare Metal Stent Models. ADVANCED THEORY AND SIMULATIONS 2022. [DOI: 10.1002/adts.202100626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Varão Moura A, Aparecido Rosini Silva A, Domingos Santo da Silva J, Aleixo Leal Pedroza L, Bornhorst J, Stiboller M, Schwerdtle T, Gubert P. Determination of ions in Caenorhabditis elegans by ion chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1204:123312. [DOI: 10.1016/j.jchromb.2022.123312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 05/04/2022] [Accepted: 05/25/2022] [Indexed: 11/27/2022]
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Development of a paper printed colorimetric sensor based on Cu-Curcumin nanoparticles for evolving point-of-care clinical diagnosis of sodium. Sci Rep 2022; 12:6247. [PMID: 35428770 PMCID: PMC9012761 DOI: 10.1038/s41598-022-09852-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 03/21/2022] [Indexed: 12/19/2022] Open
Abstract
The homeostatic control of Sodium (Na+) ion in the human body assumes paramount relevance owing to its physiological importance. Any deviation from the normal level causes serious health problems like hypernatremia, hyponatremia, stroke, kidney problems etc. Therefore, quantification of Na+ levels in body fluids has significant diagnostic and prognostic importance. However, interfering ions like Potassium ion (K+) is the major hurdle in sodium detection. In this work, we synthesized the clusters of 3-9 nm-sized highly stable and pure Copper nanoparticles surface functionalised with curcumin, through chemical reduction method. Each cluster of particles is encapsulated in a curcumin layer which is clearly visible in TEM images. The results show that these curcumin functionalized Cu NPs (CuC) are highly selective to the colorimetric detection of Na+. The ions like K+, Mg2+ and Zn2+ did not interfere with the Na+ in this sensing technique. Low-cost paper-based sensor strips are fabricated and calibrated for the sensing of sodium in the physiological range and shade cards were developed as a calorimetric guide for estimation of Na+ which makes them ideal point of care diagnostic platform. We demonstrate that the proposed CuC paper strip can be used for detecting Na+ concentration within the whole physiological range in both blood serum and urine.
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15
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Ma S, Wang Y, Zhang W, Wang Y, Li G. Solid-Contact Ion-Selective Electrodes for Histamine Determination. SENSORS (BASEL, SWITZERLAND) 2021; 21:6658. [PMID: 34640978 PMCID: PMC8512055 DOI: 10.3390/s21196658] [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] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 11/16/2022]
Abstract
Solid-contact ion-selective electrodes for histamine (HA) determination were fabricated and studied. Gold wire (0.5 mm diameter) was coated with poly(3,4-ethlenedioxythiophene) doped with poly(styrenesulfonate) (PEDOT:PSS) as a solid conductive layer. The polyvinyl chloride matrix embedded with 5,10,15,20-tetraphenyl(porphyrinato)iron(iii) chloride as an ionophore, 2-nitrophenyloctyl ether as a plasticizer and potassium tetrakis(p-chlorophenyl) borate as an ion exchanger was used to cover the PEDOT:PSS layer as a selective membrane. The characteristics of the HA electrodes were also investigated. The detection limit of 8.58 × 10-6 M, the fast response time of less than 5 s, the good reproducibility, the long-term stability and the selectivity in the presence of common interferences in biological fluids were satisfactory. The electrode also performed stably in the pH range of 7-8 and the temperature range of 35-41 °C. Additionally, the recovery rate of 99.7% in artificial cerebrospinal fluid showed the potential for the electrode to be used in biological applications.
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Affiliation(s)
| | | | | | | | - Guang Li
- State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China; (S.M.); (Y.W.); (W.Z.); (Y.W.)
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16
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Anand A, Tseng HC, Chiang HC, Hsu WH, Liao YF, Lu SHA, Tsai SY, Pan CY, Chen YT. Significant Elevation in Potassium Concentration Surrounding Stimulated Excitable Cells Revealed by an Aptamer-Modified Nanowire Transistor. ACS APPLIED BIO MATERIALS 2021; 4:6865-6873. [PMID: 35006986 DOI: 10.1021/acsabm.1c00584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Recording ion fluctuations surrounding biological cells with a nanoelectronic device offers seamless integration of nanotechnology into living organisms and is essential for understanding cellular activities. The concentration of potassium ion in the extracellular fluid (CK+ex) is a critical determinant of cell membrane potential and must be maintained within an appropriate range. Alteration in CK+ex can affect neuronal excitability, induce heart arrhythmias, and even trigger seizure-like reactions in the brain. Therefore, monitoring local fluctuations in real time provides an early diagnosis of the occurrence of the K+-induced pathophysiological responses. Here, we modified the surface of a silicon nanowire field-effect transistor (SiNW-FET) with K+-specific DNA-aptamers (AptK+) to monitor the real-time variations of CK+ex in primary cultured rat embryonic cortical neurons or human embryonic stem cell-derived cardiomyocytes. The binding affinity of AptK+ to K+, determined by measuring the dissociation constant of the AptK+-K+ complex (Kd = 10.1 ± 0.9 mM), is at least 38-fold higher than other ions (e.g., Na+, Ca2+, and Mg2+). By placing cultured cortical neurons over an AptK+/SiNW-FET device, α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) stimulation raised the CK+ex dose-dependently to 16 mM when AMPA concentration was >10 μM; this elevation could be significantly suppressed by an AMPA receptor antagonist, 6,7-dinitroquinoxaline-2,3-dione. Likewise, the stimulation of isoproterenol to cardiomyocytes raised the CK+ex to 6-8 mM, with a concomitant increase in the beating rate. This study utilizing a robust nanobiosensor to detect real-time ion fluctuations surrounding excitable cells underlies the importance of ion homeostasis and offers the feasibility of developing an implant device for real-time monitoring.
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Affiliation(s)
- Ankur Anand
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.,Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Hui-Chiun Tseng
- Department of Life Science, National Taiwan University, Taipei 10617, Taiwan
| | - Hsu-Cheng Chiang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Wan-Hsuan Hsu
- Department of Life Science, National Taiwan University, Taipei 10617, Taiwan
| | - Yi-Fan Liao
- Department of Life Science, National Taiwan University, Taipei 10617, Taiwan.,Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - Serena Huei-An Lu
- Department of Life Science, National Taiwan University, Taipei 10617, Taiwan
| | - Su-Yi Tsai
- Department of Life Science, National Taiwan University, Taipei 10617, Taiwan
| | - Chien-Yuan Pan
- Department of Life Science, National Taiwan University, Taipei 10617, Taiwan
| | - Yit-Tsong Chen
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.,Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
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17
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Dipodal Tetraamide Derivatives of 1,10-Diaza-18-Crown-6 and Alkylmalonic Acids-Synthesis and Use as Ionophores in Ion Selective Membrane Electrodes. SENSORS 2021; 21:s21154984. [PMID: 34372221 PMCID: PMC8348374 DOI: 10.3390/s21154984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/29/2021] [Accepted: 07/15/2021] [Indexed: 11/17/2022]
Abstract
Novel dipodal derivatives of an 18-membered diaza-crown ether with two diamide chains featuring methylmalonic or butylmalonic acid residues were obtained and tested as ionophores in ion-selective plasticized membrane electrodes. The objective of the study was to identify measurement conditions which ensure the most favorable performance for magnesium ion-selective electrodes. The relationship between the molar lipophilic anion salt-to-ionophore ratio and selectivity of electrodes was examined. The best result was obtained for the conventional electrode containing Mg2 ionophore. Calculated selectivity coefficients were as follows: logKMg/Ca = −2.77, logKMg/Na = −3.46 and logKMg.K = −2.24 (SSM, 1M).
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18
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Chapp AD, Mermelstein PG, Thomas MJ. The ethanol metabolite acetic acid activates mouse nucleus accumbens shell medium spiny neurons. J Neurophysiol 2021; 125:620-627. [PMID: 33405999 DOI: 10.1152/jn.00659.2020] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Although ethanol consumption leads to an array of neurophysiological alterations involving the neural circuits for reward, the underlying mechanisms remain unclear. Acetic acid is a major metabolite of ethanol with high bioactivity and potentially significant pharmacological importance in regulating brain function. Yet, the impact of acetic acid on reward circuit function has not been well explored. Given the rewarding properties associated with ethanol consumption, we investigated the acute effects of ethanol and/or acetic acid on the neurophysiological function of medium spiny neurons of the nucleus accumbens shell, a key node in the mammalian reward circuit. We find that acetic acid, but not ethanol, provided a rapid and robust boost in neuronal excitability at physiologically relevant concentrations, whereas both compounds enhanced glutamatergic synaptic activity. These effects were consistent across both sexes in C57BL/6J mice. Overall, our data suggest acetic acid is a promising candidate mediator for ethanol effects on mood and motivation that deserves further investigation.NEW & NOTEWORTHY Ethanol consumption disrupts many neurophysiological processes leading to alterations in behavior and physiological function. The possible involvement of acetic acid, produced via ethanol metabolism, has been insufficiently explored. Here, we demonstrate that acetic acid contributes to rapid neurophysiological alterations in the accumbens shell. These findings raise the interesting possibility that ethanol may serve as a prodrug-generating acetic acid as a metabolite-that may influence ethanol consumption-associated behaviors and physiological responses by altering neurophysiological function.
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Affiliation(s)
- Andrew D Chapp
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota.,Medical Discovery Team on Addiction, University of Minnesota, Minneapolis, Minnesota
| | - Paul G Mermelstein
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota.,Medical Discovery Team on Addiction, University of Minnesota, Minneapolis, Minnesota
| | - Mark J Thomas
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota.,Medical Discovery Team on Addiction, University of Minnesota, Minneapolis, Minnesota
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Abstract
Conducting polymers display a range of interesting properties, from electrical conduction to tunable optical absorption and mechanical flexibility, to name but a few. Their properties arise from positive charges (carbocations) on their conjugated backbone that are stabilised by counterions doped in the polymer matrix. In this research we report hydrolysis of these carbocations when poly(3,4-ethylenedioxy thiophene) is exposed to 1 mM aqueous salt solutions. Remarkably, two classes of anion interactions are revealed; anions that oxidise PEDOT via a doping process, and those that facilitate the SN1 hydrolysis of the carbocation to create hydroxylated PEDOT. A pKa of 6.4 for the conjugate acid of the anion approximately marks the transition between chemical oxidation and hydrolysis. PEDOT can be cycled between hydrolysis and oxidation by alternating exposure to different salt solutions. This has ramifications for using doped conducting polymers in aqueous environments (such as sensing, energy storage and biomedical devices).
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20
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Ghaderinezhad F, Ceylan Koydemir H, Tseng D, Karinca D, Liang K, Ozcan A, Tasoglu S. Sensing of electrolytes in urine using a miniaturized paper-based device. Sci Rep 2020; 10:13620. [PMID: 32788641 PMCID: PMC7423618 DOI: 10.1038/s41598-020-70456-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 06/29/2020] [Indexed: 12/18/2022] Open
Abstract
Analyzing electrolytes in urine, such as sodium, potassium, calcium, chloride, and nitrite, has significant diagnostic value in detecting various conditions, such as kidney disorder, urinary stone disease, urinary tract infection, and cystic fibrosis. Ideally, by regularly monitoring these ions with the convenience of dipsticks and portable tools, such as cellphones, informed decision making is possible to control the consumption of these ions. Here, we report a paper-based sensor for measuring the concentration of sodium, potassium, calcium, chloride, and nitrite in urine, accurately quantified using a smartphone-enabled platform. By testing the device with both Tris buffer and artificial urine containing a wide range of electrolyte concentrations, we demonstrate that the proposed device can be used for detecting potassium, calcium, chloride, and nitrite within the whole physiological range of concentrations, and for binary quantification of sodium concentration.
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Affiliation(s)
- Fariba Ghaderinezhad
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT, 06269, USA
| | - Hatice Ceylan Koydemir
- Electrical and Computer Engineering, University of California, Los Angeles, CA, 90095, USA.,Bioengineering, University of California, Los Angeles, CA, 90095, USA.,California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA
| | - Derek Tseng
- Electrical and Computer Engineering, University of California, Los Angeles, CA, 90095, USA.,Bioengineering, University of California, Los Angeles, CA, 90095, USA.,California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA
| | - Doruk Karinca
- Computer Science, University of California, Los Angeles, CA, 90095, USA
| | - Kyle Liang
- Computer Science, University of California, Los Angeles, CA, 90095, USA
| | - Aydogan Ozcan
- Electrical and Computer Engineering, University of California, Los Angeles, CA, 90095, USA. .,Bioengineering, University of California, Los Angeles, CA, 90095, USA. .,California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA.
| | - Savas Tasoglu
- Department of Mechanical Engineering, Koc University, Sariyer, Istanbul, 34450, Turkey. .,Koç University Arçelik Research Center for Creative Industries (KUAR), Koç University, Sariyer, Istanbul, 34450, Turkey. .,Boğaziçi Institute of Biomedical Engineering, Boğaziçi University, Çengelköy, Istanbul, 34684, Turkey. .,Koc University Research Center for Translational Medicine, Koç University, Sariyer, Istanbul, 34450, Turkey.
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21
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Selective ion sensing with high resolution large area graphene field effect transistor arrays. Nat Commun 2020; 11:3226. [PMID: 32591504 PMCID: PMC7320191 DOI: 10.1038/s41467-020-16979-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/03/2020] [Indexed: 11/19/2022] Open
Abstract
Real-time, high resolution, simultaneous measurement of multiple ionic species is challenging with existing chromatographic, spectrophotometric and potentiometric techniques. Potentiometric ion sensors exhibit limitations in both resolution and selectivity. Herein, we develop wafer scale graphene transistor technology for overcoming these limitations. Large area graphene is an ideal material for high resolution ion sensitive field effect transistors (ISFETs), while simultaneously enabling facile fabrication as compared to conventional semiconductors. We develop the ISFETs into an array and apply Nikolskii–Eisenman analysis to account for cross-sensitivity and thereby achieve high selectivity. We experimentally demonstrate real-time, simultaneous concentration measurement of K+, Na+, \documentclass[12pt]{minimal}
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\begin{document}$$\sim\! 2\times 1{0}^{-3}\,{\mathrm{log}}\,$$\end{document}~2×10−3log concentration units. The array achieves an accuracy of ±0.05 log concentration. Finally, we demonstrate real-time ion concentration measurement in an aquarium with lemnoideae lemna over three weeks, where mineral uptake by aquatic organisms can be observed during their growth. The authors demonstrate wafer-scale, graphene-based ion sensitive field effect transistors arrays for simultaneous concentration measurement of K+, Na+, NH4+, NO3−, SO42−, HPO42− and Cl−, and use their technology for real-time ion concentration measurements in an aquarium with lemnoideae lemna over a period of three weeks.
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22
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Wu C, Selberg J, Nguyen B, Pansodtee P, Jia M, Dechiraju H, Teodorescu M, Rolandi M. A Microfluidic Ion Sensor Array. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1906436. [PMID: 31965738 DOI: 10.1002/smll.201906436] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 12/16/2019] [Indexed: 06/10/2023]
Abstract
A balanced concentration of ions is essential for biological processes to occur. For example, [H+ ] gradients power adenosine triphosphate synthesis, dynamic changes in [K+ ] and [Na+ ] create action potentials in neuronal communication, and [Cl- ] contributes to maintaining appropriate cell membrane voltage. Sensing ionic concentration is thus important for monitoring and regulating many biological processes. This work demonstrates an ion-selective microelectrode array that simultaneously and independently senses [K+ ], [Na+ ], and [Cl- ] in electrolyte solutions. To obtain ion specificity, the required ion-selective membranes are patterned using microfluidics. As a proof of concept, the change in ionic concentration is monitored during cell proliferation in a cell culture medium. This microelectrode array can easily be integrated in lab-on-a-chip approaches to physiology and biological research and applications.
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Affiliation(s)
- Chunxiao Wu
- Department of Electrical and Computer Engineering, University of California, 1156 High St, Santa Cruz, CA, 95064, USA
| | - John Selberg
- Department of Electrical and Computer Engineering, University of California, 1156 High St, Santa Cruz, CA, 95064, USA
| | - Brian Nguyen
- Department of Electrical and Computer Engineering, University of California, 1156 High St, Santa Cruz, CA, 95064, USA
| | - Pattawong Pansodtee
- Department of Electrical and Computer Engineering, University of California, 1156 High St, Santa Cruz, CA, 95064, USA
| | - Manping Jia
- Department of Electrical and Computer Engineering, University of California, 1156 High St, Santa Cruz, CA, 95064, USA
| | - Harika Dechiraju
- Department of Electrical and Computer Engineering, University of California, 1156 High St, Santa Cruz, CA, 95064, USA
| | - Mircea Teodorescu
- Department of Electrical and Computer Engineering, University of California, 1156 High St, Santa Cruz, CA, 95064, USA
| | - Marco Rolandi
- Department of Electrical and Computer Engineering, University of California, 1156 High St, Santa Cruz, CA, 95064, USA
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23
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Chapp AD, Schum S, Behnke JE, Hahka T, Huber MJ, Jiang E, Larson RA, Shan Z, Chen QH. Measurement of cations, anions, and acetate in serum, urine, cerebrospinal fluid, and tissue by ion chromatography. Physiol Rep 2019; 6:e13666. [PMID: 29654634 PMCID: PMC5899179 DOI: 10.14814/phy2.13666] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 02/12/2018] [Indexed: 01/17/2023] Open
Abstract
Accurate quantification of cations and anions remains a major diagnostic tool in understanding diseased states. The current technologies used for these analyses are either unable to quantify all ions due to sample size/volume, instrument setup/method, or are only able to measure ion concentrations from one physiological sample (liquid or solid). Herein, we adapted a common analytical chemistry technique, ion chromatography and applied it to measure the concentration of cations; sodium, potassium, calcium, and magnesium (Na+, K+, Ca2+, and Mg2+) and anions; chloride, and acetate (Cl−, −OAc) from physiological samples. Specifically, cations and anions were measured in liquid samples: serum, urine, and cerebrospinal fluid, as well as tissue samples: liver, cortex, hypothalamus, and amygdala. Serum concentrations of Na+, K+, Ca2+, Mg2+, Cl−, and −OAc (mmol/L): 138.8 ± 4.56, 4.05 ± 0.21, 4.07 ± 0.26, 0.98 ± 0.05, 97.7 ± 3.42, and 0.23 ± 0.04, respectively. Cerebrospinal fluid concentrations of Na+, K+, Ca2+, Mg2+, Cl−, and −OAc (mmol/L): 145.1 ± 2.81, 2.41 ± 0.26, 2.18 ± 0.38, 1.04 ± 0.11, 120.2 ± 3.75, 0.21 ± 0.05, respectively. Tissue Na+, K+, Ca2+, Mg2+, Cl−, and −OAc were also measured. Validation of the ion chromatography method was established by comparing chloride concentration between ion chromatography with a known method using an ion selective chloride electrode. These results indicate that ion chromatography is a suitable method for the measurement of cations and anions, including acetate from various physiological samples.
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Affiliation(s)
- Andrew D Chapp
- Department of Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, Michigan.,Department of Biological Sciences, Michigan Technological University, Houghton, Michigan
| | - Simeon Schum
- Department of Chemistry, Michigan Technological University, Houghton, Michigan
| | - Jessica E Behnke
- Department of Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, Michigan.,Department of Biological Sciences, Michigan Technological University, Houghton, Michigan
| | - Taija Hahka
- Department of Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, Michigan.,Department of Biological Sciences, Michigan Technological University, Houghton, Michigan
| | - Michael J Huber
- Department of Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, Michigan.,Department of Biological Sciences, Michigan Technological University, Houghton, Michigan
| | - Enshe Jiang
- Department of Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, Michigan
| | - Robert A Larson
- Department of Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, Michigan.,Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Zhiying Shan
- Department of Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, Michigan.,Department of Biological Sciences, Michigan Technological University, Houghton, Michigan
| | - Qing-Hui Chen
- Department of Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, Michigan.,Department of Biological Sciences, Michigan Technological University, Houghton, Michigan
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