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Stary D, Bajda M. Taurine and Creatine Transporters as Potential Drug Targets in Cancer Therapy. Int J Mol Sci 2023; 24:ijms24043788. [PMID: 36835201 PMCID: PMC9964810 DOI: 10.3390/ijms24043788] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/07/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
Cancer cells are characterized by uncontrolled growth, proliferation, and impaired apoptosis. Tumour progression could be related to poor prognosis and due to this fact, researchers have been working on novel therapeutic strategies and antineoplastic agents. It is known that altered expression and function of solute carrier proteins from the SLC6 family could be associated with severe diseases, including cancers. These proteins were noticed to play important physiological roles through transferring nutrient amino acids, osmolytes, neurotransmitters, and ions, and many of them are necessary for survival of the cells. Herein, we present the potential role of taurine (SLC6A6) and creatine (SLC6A8) transporters in cancer development as well as therapeutic potential of their inhibitors. Experimental data indicate that overexpression of analyzed proteins could be connected with colon or breast cancers, which are the most common types of cancers. The pool of known inhibitors of these transporters is limited; however, one ligand of SLC6A8 protein is currently tested in the first phase of clinical trials. Therefore, we also highlight structural aspects useful for ligand development. In this review, we discuss SLC6A6 and SLC6A8 transporters as potential biological targets for anticancer agents.
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Affiliation(s)
- Dorota Stary
- Department of Physicochemical Drug Analysis, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9 St., 30-688 Cracow, Poland
- Doctoral School of Medical and Health Sciences, Jagiellonian University Medical College, św. Łazarza 16 St., 31-530 Cracow, Poland
| | - Marek Bajda
- Department of Physicochemical Drug Analysis, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9 St., 30-688 Cracow, Poland
- Correspondence:
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Acuña I, Ruiz A, Cerdó T, Cantarero S, López-Moreno A, Aguilera M, Campoy C, Suárez A. Rapid and simultaneous determination of histidine metabolism intermediates in human and mouse microbiota and biomatrices. Biofactors 2022; 48:315-328. [PMID: 34245620 DOI: 10.1002/biof.1766] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 06/08/2021] [Indexed: 12/12/2022]
Abstract
Histidine metabolism is a key pathway physiologically involved in satiety, recognition memory, skin, and neural protection and allergic diseases. Microbiologically-produced imidazole propionate induces type II diabetes and interferes with glucose lowering drugs. Despite their determinant health implications, no single method simultaneously assesses histidine metabolites in urine, feces, and microbiota. The aim of this study was to develop a simple, rapid, and sensitive method for the determination of histidine and its major bioactive metabolites histamine, N-acetylhistamine, imidazole-4-acetate, cis-urocanate, trans-urocanate, glutamate and imidazole propionate, using ultrahigh-performance liquid chromatography with electrospray ionization tandem mass spectrometry. An innovative simple extraction method from small aliquots of human and mice urine, feces and microbial cell extracts was coupled to separation in a 6.5 min chromatographic run. The successful performance allowed accurate and precise quantification of all metabolites in mouse feces, suggesting broad exchange of histidine metabolites between the gut and mice. Higher urine histamine, histamine to histidine ratio, and imidazole-4-acetate pointed to an underlying inflammatory or allergic process in mice compared to human subjects. N-acetylhistamine and imidazole propionate were detected in human and mouse feces, confirming its origin from gut microbial metabolism. Our novel and robust analytical method captured histidine metabolism in a single assay that will facilitate broad and deep histidine metabolic phenotyping assessing the impact of microbiota on host health in large-scale human observational and interventional studies.
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Affiliation(s)
- Inmaculada Acuña
- Department of Biochemistry and Molecular Biology 2, Biomedical Research Centre, University of Granada, Granada, Spain
- Instituto de Nutrición y Tecnología de los Alimentos, INYTA, Biomedical Research Centre, University of Granada, Granada, Spain
| | - Alicia Ruiz
- Centre for Inflammation Research, Queen's Medical Institute, University of Edinburgh, Edinburgh, UK
| | | | - Samuel Cantarero
- Centre for Scientific Instrumentation, University of Granada, Campus of Fuentenueva, Granada, Spain
| | - Ana López-Moreno
- Instituto de Nutrición y Tecnología de los Alimentos, INYTA, Biomedical Research Centre, University of Granada, Granada, Spain
- Department of Microbiology, Faculty of Pharmacy, University of Granada, Campus of Cartuja, Granada, Spain
| | - Margarita Aguilera
- Instituto de Nutrición y Tecnología de los Alimentos, INYTA, Biomedical Research Centre, University of Granada, Granada, Spain
- Department of Microbiology, Faculty of Pharmacy, University of Granada, Campus of Cartuja, Granada, Spain
- Instituto de Investigación Biosanitaria, Ibs-Granada, Granada, Spain
| | - Cristina Campoy
- Department of Paediatrics, School of Medicine, University of Granada, Granada, Spain
- Spanish Network of Biomedical Research in Epidemiology and Public Health (CIBERESP), Granada's node, Institute of Health Carlos III, Madrid, Spain
| | - Antonio Suárez
- Department of Biochemistry and Molecular Biology 2, Biomedical Research Centre, University of Granada, Granada, Spain
- Instituto de Nutrición y Tecnología de los Alimentos, INYTA, Biomedical Research Centre, University of Granada, Granada, Spain
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Richter M, Moroniak SJ, Michel H. Identification of competitive inhibitors of the human taurine transporter TauT in a human kidney cell line. Pharmacol Rep 2019; 71:121-129. [PMID: 30612046 DOI: 10.1016/j.pharep.2018.10.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 09/24/2018] [Accepted: 10/10/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND The osmolyte and antioxidant taurine plays an important role in regulation of cellular volume, oxidative status and Ca2+-homeostasis. Taurine uptake in human cells is regulated by the Na+- and Cl--dependent taurine transporter TauT. In order to gain deeper structural insights about the substrate binding pocket of TauT, a HEK293 cell line producing a GFP-TauT fusion protein was generated. METHODS Transport activity was validated using cell-based [3H]-taurine transport assays. We determined the Km and IC50 values of taurine, β-alanine and γ-aminobutyrate. Additionally we were able to identify structurally similar compounds as potential new substrates or inhibitors of the TauT transporter. Substrate induced cytotoxicity was analyzed using a cell viability assay. RESULTS In this study we show competitive effects of the 3-pyridinesulfonate, 2-aminoethylhydrogen sulfate, 5-aminovalerate, β-aminobutyrate, piperidine-4-sulfonate, 2-aminoethylphosphate and homotaurine. We demonstrate that taurine uptake can be inhibited by a phosphate. Furthermore our studies revealed that piperidine-4-sulfonate interacts with TauT with a higher affinity than γ-aminobutyrate and imidazole-4-acetate. CONCLUSION We propose that piperidine-4-sulfonate may serve as a potential lead structure for the design of novel drug candidates required for specific modulation of the TauT transporter in therapy of neurodegenerative diseases.
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Affiliation(s)
- Michelle Richter
- Department of Molecular Membrane Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany
| | - Selina J Moroniak
- Department of Molecular Membrane Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany
| | - Hartmut Michel
- Department of Molecular Membrane Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany
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Villar-Briones A, Aird SD. Organic and Peptidyl Constituents of Snake Venoms: The Picture Is Vastly More Complex Than We Imagined. Toxins (Basel) 2018; 10:E392. [PMID: 30261630 PMCID: PMC6215107 DOI: 10.3390/toxins10100392] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 09/18/2018] [Accepted: 09/20/2018] [Indexed: 12/24/2022] Open
Abstract
Small metabolites and peptides in 17 snake venoms (Elapidae, Viperinae, and Crotalinae), were quantified using liquid chromatography-mass spectrometry. Each venom contains >900 metabolites and peptides. Many small organic compounds are present at levels that are probably significant in prey envenomation, given that their known pharmacologies are consistent with snake envenomation strategies. Metabolites included purine nucleosides and their bases, neurotransmitters, neuromodulators, guanidino compounds, carboxylic acids, amines, mono- and disaccharides, and amino acids. Peptides of 2⁻15 amino acids are also present in significant quantities, particularly in crotaline and viperine venoms. Some constituents are specific to individual taxa, while others are broadly distributed. Some of the latter appear to support high anabolic activity in the gland, rather than having toxic functions. Overall, the most abundant organic metabolite was citric acid, owing to its predominance in viperine and crotaline venoms, where it chelates divalent cations to prevent venom degradation by venom metalloproteases and damage to glandular tissue by phospholipases. However, in terms of their concentrations in individual venoms, adenosine, adenine, were most abundant, owing to their high titers in Dendroaspis polylepis venom, although hypoxanthine, guanosine, inosine, and guanine all numbered among the 50 most abundant organic constituents. A purine not previously reported in venoms, ethyl adenosine carboxylate, was discovered in D. polylepis venom, where it probably contributes to the profound hypotension caused by this venom. Acetylcholine was present in significant quantities only in this highly excitotoxic venom, while 4-guanidinobutyric acid and 5-guanidino-2-oxopentanoic acid were present in all venoms.
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Affiliation(s)
- Alejandro Villar-Briones
- Division of Research Support, Okinawa Institute of Science and Technology, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa 904-0495, Japan.
| | - Steven D Aird
- Division of Faculty Affairs and Ecology and Evolution Unit, Okinawa Institute of Science and Technology, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa 904-0495, Japan.
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Zhao W, Ding H, Hu S, Huang J, Lv C, Mei J, Jin Z, Yao S, Mei L. An efficient biocatalytic synthesis of imidazole-4-acetic acid. Biotechnol Lett 2018; 40:1049-1055. [PMID: 29796898 DOI: 10.1007/s10529-018-2569-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Accepted: 05/16/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To develop a new and efficient biocatalytic synthesis method of imidazole-4-acetic acid (IAA) from L-histidine (L-His). RESULTS L-His was converted to imidazole-4-pyruvic acid (IPA) by an Escherichia coli whole-cell biocatalyst expressing membrane-bound L-amino acid deaminase (mL-AAD) from Proteus vulgaris firstly. The obtained IPA was subsequently decarboxylated to IAA under the action of H2O2. Under optimum conditions, 34.97 mM IAA can be produced from 50 mM L-His, with a yield of 69.9%. CONCLUSIONS Compared to the traditional chemical synthesis, this biocatalytic method for IAA production is not only environmentally friendly, but also more cost effective, thus being promising for industrial IAA production.
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Affiliation(s)
- Weirui Zhao
- School of Biological and Chemical Engineering, Ningbo Institute of Technology, Zhejiang University, No. 1, Xue Fu Road, Yin Zhou District, Ningbo, Zhejiang, China
| | - Huanru Ding
- School of Biological and Chemical Engineering, Ningbo Institute of Technology, Zhejiang University, No. 1, Xue Fu Road, Yin Zhou District, Ningbo, Zhejiang, China.,College of Chemical and Biological Engineering, Zhejiang University, No. 38, Zhe Da Road, Xi Hu District, Hangzhou, Zhejiang, China
| | - Sheng Hu
- School of Biological and Chemical Engineering, Ningbo Institute of Technology, Zhejiang University, No. 1, Xue Fu Road, Yin Zhou District, Ningbo, Zhejiang, China
| | - Jun Huang
- Department of Chemical Engineering, The University of Utah, 201 Presidents Circle, Salt Lake City, USA
| | - Changjiang Lv
- Department of Chemical Engineering, The University of Utah, 201 Presidents Circle, Salt Lake City, USA
| | - Jiaqi Mei
- School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, No. 318, Liu He Road, Xi Hu District, Hangzhou, Zhejiang, China
| | - Zhihua Jin
- School of Biological and Chemical Engineering, Ningbo Institute of Technology, Zhejiang University, No. 1, Xue Fu Road, Yin Zhou District, Ningbo, Zhejiang, China
| | - Shanjing Yao
- College of Chemical and Biological Engineering, Zhejiang University, No. 38, Zhe Da Road, Xi Hu District, Hangzhou, Zhejiang, China
| | - Lehe Mei
- School of Biological and Chemical Engineering, Ningbo Institute of Technology, Zhejiang University, No. 1, Xue Fu Road, Yin Zhou District, Ningbo, Zhejiang, China. .,College of Chemical and Biological Engineering, Zhejiang University, No. 38, Zhe Da Road, Xi Hu District, Hangzhou, Zhejiang, China.
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Nielsen CU, Bjerg M, Ulaganathan N, Holm R. Oral and intravenous pharmacokinetics of taurine in sprague-dawley rats: the influence of dose and the possible involvement of the proton-coupled amino acid transporter, PAT1, in oral taurine absorption. Physiol Rep 2017; 5:5/19/e13467. [PMID: 29038364 PMCID: PMC5641942 DOI: 10.14814/phy2.13467] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 08/30/2017] [Accepted: 09/10/2017] [Indexed: 11/24/2022] Open
Abstract
Taurine is involved in various physiological processes, and one of the most abundant amino acids in human. The aim was to investigate the mechanism for intestinal absorption of taurine in vivo using also in vitro mechanistic studies. Taurine absorption was measured in male Sprague‐Dawley rats at 10–997 mg/kg and 1–30 mg/kg for oral and intravenous administration, respectively. Oral absorption was measured in the presence of substrates for the proton‐coupled amino acid transporter, PAT1, that is, 200 mg/kg proline (Pro) and sarcosine (Sar), and in the presence of 2‐Amino‐2‐norbornanecarboxylic acid (BCH) (200 mg/kg). BCH is not an inhibitor of PAT1 or the taurine transporter, TauT, hence it was included as a negative control. In vitro studies investigating the transport mechanism of taurine were conducted in human intestinal Caco‐2 cells. The pharmacokinetic investigations showed that intestinal taurine absorption was not saturable at the investigated doses, but that the time (tmax) to reach the maximal plasma concentration (Cmax) increased with dose. Furthermore, Sar and Pro, but not BCH, decreased taurine Cmax. In vitro it was clearly shown that PAT1 mediated the cellular uptake of taurine and thereby facilitated the transepithelial taurine transport, which could be inhibited by Pro and Sar, but not BCH. In vivo and in vitro results suggest that taurine absorption from the intestine is caused by PAT1.
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Affiliation(s)
- Carsten Uhd Nielsen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense M, Denmark
| | - Maria Bjerg
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense M, Denmark
| | - Nithiya Ulaganathan
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense M, Denmark
| | - René Holm
- Pharmaceutical Science and CMC Biologics, H. Lundbeck A/S, Valby, Denmark
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