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Premeti K, Tsipa D, Nadalis AE, Papanikolaou MG, Syropoulou V, Karagkiozeli KD, Aggelis G, Iordanidou E, Labrakakis C, Pappas P, Keramidas AD, Antoniou K, Doulias PT, Kabanos TA, Leondaritis G. First generation vanadium-based PTEN inhibitors: Comparative study in vitro and in vivo and identification of a novel mechanism of action. Biochem Pharmacol 2025; 233:116756. [PMID: 39824468 DOI: 10.1016/j.bcp.2025.116756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2024] [Revised: 11/29/2024] [Accepted: 01/13/2025] [Indexed: 01/20/2025]
Abstract
PTEN, a tumor suppressor phosphatase, regulates cellular functions by antagonizing the growth promoting PI3K/Akt/mTOR pathway through the dephosphorylation of the second messenger PIP3. Many preclinical cellular and animal studies have used PTEN inhibitors to highlight specific disease contexts where acute activation of PI3K/Akt/mTOR pathway might offer therapeutic advantages. In the present study we have re-evaluated first-generation PTEN inhibitors, including established bisperoxo-vanadium(V) complexes (bpVs). In vitro, all compounds tested inhibited PTEN with IC50 values between 0.2-0.8 μM, although their activity diminished under reducing conditions. bpV(phen) and bpV(HΟpic) significantly increased pSer473Akt levels in PTEN wild-type cells while bpV(phen) induced phosphorylation in PTEN null cells upon re-expression of functional PTEN. bpV(ΗΟpic) was less specific since it also triggered PTEN-independent Erk1/2 phosphorylation. In vivo, bpV(phen) administration in Wistar rats enhanced pS6 levels in kidney and liver tissues, but not in several CNS tissues, and led to reduced locomotion and exploratory behaviour in the open field test. The consensus mechanism of action of first generation PTEN inhibitors appears to be oxidative inhibition, however bpV(phen) does not induce oxidation of cellular endogenous PTEN. Instead, our findings suggest that the inhibition of PTEN by bpV(phen) in cells and in vivo may proceed through a mechanism involving non-specific S-nitrosylation of PTEN. Our study highlights the complexity of PTEN inhibition by first-generation compounds and their limitations, such as low specificity, adverse effects and non-specific mechanisms of action, and emphasizes the need for developing more selective and potent PTEN inhibitors with improved efficacy and well-defined mechanisms of actions.
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Affiliation(s)
- Kyriaki Premeti
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | - Dimitra Tsipa
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | - Antonios E Nadalis
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | - Michael G Papanikolaou
- Department of Chemistry, University of Ioannina, Ioannina 45110, Greece; Department of Chemistry, University of Cyprus, Nicosia 2109, Cyprus
| | - Vasiliki Syropoulou
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | - Konstantina-Danai Karagkiozeli
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | - George Aggelis
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | - Eleni Iordanidou
- Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Charalampos Labrakakis
- Department of Biological Applications and Technology, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece; Institute of Biosciences, University Research Center Ioannina, University of Ioannina, Ioannina, Greece
| | - Periklis Pappas
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | | | - Katerina Antoniou
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece; Institute of Biosciences, University Research Center Ioannina, University of Ioannina, Ioannina, Greece
| | - Paschalis-Thomas Doulias
- Department of Chemistry, University of Ioannina, Ioannina 45110, Greece; Institute of Biosciences, University Research Center Ioannina, University of Ioannina, Ioannina, Greece
| | | | - George Leondaritis
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece; Institute of Biosciences, University Research Center Ioannina, University of Ioannina, Ioannina, Greece.
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Cadenas-Garrido P, Schonvandt-Alarcos A, Herrera-Quintana L, Vázquez-Lorente H, Santamaría-Quiles A, Ruiz de Francisco J, Moya-Escudero M, Martín-Oliva D, Martín-Guerrero SM, Rodríguez-Santana C, Aragón-Vela J, Plaza-Diaz J. Using Redox Proteomics to Gain New Insights into Neurodegenerative Disease and Protein Modification. Antioxidants (Basel) 2024; 13:127. [PMID: 38275652 PMCID: PMC10812581 DOI: 10.3390/antiox13010127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/16/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024] Open
Abstract
Antioxidant defenses in biological systems ensure redox homeostasis, regulating baseline levels of reactive oxygen and nitrogen species (ROS and RNS). Oxidative stress (OS), characterized by a lack of antioxidant defenses or an elevation in ROS and RNS, may cause a modification of biomolecules, ROS being primarily absorbed by proteins. As a result of both genome and environment interactions, proteomics provides complete information about a cell's proteome, which changes continuously. Besides measuring protein expression levels, proteomics can also be used to identify protein modifications, localizations, the effects of added agents, and the interactions between proteins. Several oxidative processes are frequently used to modify proteins post-translationally, including carbonylation, oxidation of amino acid side chains, glycation, or lipid peroxidation, which produces highly reactive alkenals. Reactive alkenals, such as 4-hydroxy-2-nonenal, are added to cysteine (Cys), lysine (Lys), or histidine (His) residues by a Michael addition, and tyrosine (Tyr) residues are nitrated and Cys residues are nitrosylated by a Michael addition. Oxidative and nitrosative stress have been implicated in many neurodegenerative diseases as a result of oxidative damage to the brain, which may be especially vulnerable due to the large consumption of dioxygen. Therefore, the current methods applied for the detection, identification, and quantification in redox proteomics are of great interest. This review describes the main protein modifications classified as chemical reactions. Finally, we discuss the importance of redox proteomics to health and describe the analytical methods used in redox proteomics.
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Affiliation(s)
- Paula Cadenas-Garrido
- Research and Advances in Molecular and Cellular Immunology, Center of Biomedical Research, University of Granada, Avda, del Conocimiento s/n, 18016 Armilla, Spain; (P.C.-G.); (A.S.-A.); (A.S.-Q.); (J.R.d.F.); (M.M.-E.)
| | - Ailén Schonvandt-Alarcos
- Research and Advances in Molecular and Cellular Immunology, Center of Biomedical Research, University of Granada, Avda, del Conocimiento s/n, 18016 Armilla, Spain; (P.C.-G.); (A.S.-A.); (A.S.-Q.); (J.R.d.F.); (M.M.-E.)
| | - Lourdes Herrera-Quintana
- Department of Physiology, Schools of Pharmacy and Medicine, University of Granada, 18071 Granada, Spain; (L.H.-Q.); (H.V.-L.); (C.R.-S.)
- Biomedical Research Center, Health Sciences Technology Park, University of Granada, 18016 Granada, Spain
| | - Héctor Vázquez-Lorente
- Department of Physiology, Schools of Pharmacy and Medicine, University of Granada, 18071 Granada, Spain; (L.H.-Q.); (H.V.-L.); (C.R.-S.)
- Biomedical Research Center, Health Sciences Technology Park, University of Granada, 18016 Granada, Spain
| | - Alicia Santamaría-Quiles
- Research and Advances in Molecular and Cellular Immunology, Center of Biomedical Research, University of Granada, Avda, del Conocimiento s/n, 18016 Armilla, Spain; (P.C.-G.); (A.S.-A.); (A.S.-Q.); (J.R.d.F.); (M.M.-E.)
| | - Jon Ruiz de Francisco
- Research and Advances in Molecular and Cellular Immunology, Center of Biomedical Research, University of Granada, Avda, del Conocimiento s/n, 18016 Armilla, Spain; (P.C.-G.); (A.S.-A.); (A.S.-Q.); (J.R.d.F.); (M.M.-E.)
| | - Marina Moya-Escudero
- Research and Advances in Molecular and Cellular Immunology, Center of Biomedical Research, University of Granada, Avda, del Conocimiento s/n, 18016 Armilla, Spain; (P.C.-G.); (A.S.-A.); (A.S.-Q.); (J.R.d.F.); (M.M.-E.)
| | - David Martín-Oliva
- Department of Cell Biology, Faculty of Science, University of Granada, 18071 Granada, Spain;
| | - Sandra M. Martín-Guerrero
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London SE5 9RT, UK
| | - César Rodríguez-Santana
- Department of Physiology, Schools of Pharmacy and Medicine, University of Granada, 18071 Granada, Spain; (L.H.-Q.); (H.V.-L.); (C.R.-S.)
- Biomedical Research Center, Health Sciences Technology Park, University of Granada, 18016 Granada, Spain
| | - Jerónimo Aragón-Vela
- Department of Health Sciences, Area of Physiology, Building B3, Campus s/n “Las Lagunillas”, University of Jaén, 23071 Jaén, Spain
| | - Julio Plaza-Diaz
- Children’s Hospital of Eastern Ontario Research Institute, Ottawa, ON K1H 8L1, Canada
- Department of Biochemistry and Molecular Biology II, School of Pharmacy, University of Granada, 18071 Granada, Spain
- Instituto de Investigación Biosanitaria IBS, Complejo Hospitalario Universitario de Granada, 18071 Granada, Spain
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Li X, Gluth A, Zhang T, Qian WJ. Thiol redox proteomics: Characterization of thiol-based post-translational modifications. Proteomics 2023; 23:e2200194. [PMID: 37248656 PMCID: PMC10764013 DOI: 10.1002/pmic.202200194] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 05/12/2023] [Accepted: 05/16/2023] [Indexed: 05/31/2023]
Abstract
Redox post-translational modifications on cysteine thiols (redox PTMs) have profound effects on protein structure and function, thus enabling regulation of various biological processes. Redox proteomics approaches aim to characterize the landscape of redox PTMs at the systems level. These approaches facilitate studies of condition-specific, dynamic processes implicating redox PTMs and have furthered our understanding of redox signaling and regulation. Mass spectrometry (MS) is a powerful tool for such analyses which has been demonstrated by significant advances in redox proteomics during the last decade. A group of well-established approaches involves the initial blocking of free thiols followed by selective reduction of oxidized PTMs and subsequent enrichment for downstream detection. Alternatively, novel chemoselective probe-based approaches have been developed for various redox PTMs. Direct detection of redox PTMs without any enrichment has also been demonstrated given the sensitivity of contemporary MS instruments. This review discusses the general principles behind different analytical strategies and covers recent advances in redox proteomics. Several applications of redox proteomics are also highlighted to illustrate how large-scale redox proteomics data can lead to novel biological insights.
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Affiliation(s)
- Xiaolu Li
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99354
| | - Austin Gluth
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99354
- Department of Biological Systems Engineering, Washington State University, Richland, WA 99354
| | - Tong Zhang
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99354
| | - Wei-Jun Qian
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99354
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