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Wang Q, Zuurbier CJ, Huhn R, Torregroza C, Hollmann MW, Preckel B, van den Brom CE, Weber NC. Pharmacological Cardioprotection against Ischemia Reperfusion Injury-The Search for a Clinical Effective Therapy. Cells 2023; 12:1432. [PMID: 37408266 DOI: 10.3390/cells12101432] [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: 04/06/2023] [Revised: 05/10/2023] [Accepted: 05/17/2023] [Indexed: 07/07/2023] Open
Abstract
Pharmacological conditioning aims to protect the heart from myocardial ischemia-reperfusion injury (IRI). Despite extensive research in this area, today, a significant gap remains between experimental findings and clinical practice. This review provides an update on recent developments in pharmacological conditioning in the experimental setting and summarizes the clinical evidence of these cardioprotective strategies in the perioperative setting. We start describing the crucial cellular processes during ischemia and reperfusion that drive acute IRI through changes in critical compounds (∆GATP, Na+, Ca2+, pH, glycogen, succinate, glucose-6-phosphate, mitoHKII, acylcarnitines, BH4, and NAD+). These compounds all precipitate common end-effector mechanisms of IRI, such as reactive oxygen species (ROS) generation, Ca2+ overload, and mitochondrial permeability transition pore opening (mPTP). We further discuss novel promising interventions targeting these processes, with emphasis on cardiomyocytes and the endothelium. The limited translatability from basic research to clinical practice is likely due to the lack of comorbidities, comedications, and peri-operative treatments in preclinical animal models, employing only monotherapy/monointervention, and the use of no-flow (always in preclinical models) versus low-flow ischemia (often in humans). Future research should focus on improved matching between preclinical models and clinical reality, and on aligning multitarget therapy with optimized dosing and timing towards the human condition.
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Affiliation(s)
- Qian Wang
- Department of Anesthesiology-L.E.I.C.A., Amsterdam University Medical Centers, Location AMC, Cardiovascular Science, Meibergdreef 11, 1105 AZ Amsterdam, The Netherlands
| | - Coert J Zuurbier
- Department of Anesthesiology-L.E.I.C.A., Amsterdam University Medical Centers, Location AMC, Cardiovascular Science, Meibergdreef 11, 1105 AZ Amsterdam, The Netherlands
| | - Ragnar Huhn
- Department of Anesthesiology, Kerckhoff-Clinic-Center for Heart, Lung, Vascular and Rheumatic Disease, Justus-Liebig-University Giessen, Benekestr. 2-8, 61231 Bad Nauheim, Germany
| | - Carolin Torregroza
- Department of Anesthesiology, Kerckhoff-Clinic-Center for Heart, Lung, Vascular and Rheumatic Disease, Justus-Liebig-University Giessen, Benekestr. 2-8, 61231 Bad Nauheim, Germany
| | - Markus W Hollmann
- Department of Anesthesiology-L.E.I.C.A., Amsterdam University Medical Centers, Location AMC, Cardiovascular Science, Meibergdreef 11, 1105 AZ Amsterdam, The Netherlands
| | - Benedikt Preckel
- Department of Anesthesiology-L.E.I.C.A., Amsterdam University Medical Centers, Location AMC, Cardiovascular Science, Meibergdreef 11, 1105 AZ Amsterdam, The Netherlands
| | - Charissa E van den Brom
- Department of Anesthesiology-L.E.I.C.A., Amsterdam University Medical Centers, Location AMC, Cardiovascular Science, Meibergdreef 11, 1105 AZ Amsterdam, The Netherlands
| | - Nina C Weber
- Department of Anesthesiology-L.E.I.C.A., Amsterdam University Medical Centers, Location AMC, Cardiovascular Science, Meibergdreef 11, 1105 AZ Amsterdam, The Netherlands
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2
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Kenworthy AK. The building blocks of caveolae revealed: caveolins finally take center stage. Biochem Soc Trans 2023; 51:855-869. [PMID: 37082988 DOI: 10.1042/bst20221298] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/07/2023] [Accepted: 04/14/2023] [Indexed: 04/22/2023]
Abstract
The ability of cells to divide, migrate, relay signals, sense mechanical stimuli, and respond to stress all rely on nanoscale invaginations of the plasma membrane known as caveolae. The caveolins, a family of monotopic membrane proteins, form the inner layer of the caveolar coat. Caveolins have long been implicated in the generation of membrane curvature, in addition to serving as scaffolds for signaling proteins. Until recently, however, the molecular architecture of caveolins was unknown, making it impossible to understand how they operate at a mechanistic level. Over the past year, two independent lines of evidence - experimental and computational - have now converged to provide the first-ever glimpse into the structure of the oligomeric caveolin complexes that function as the building blocks of caveolae. Here, we summarize how these discoveries are transforming our understanding of this long-enigmatic protein family and their role in caveolae assembly and function. We present new models inspired by the structure for how caveolins oligomerize, remodel membranes, interact with their binding partners, and reorganize when mutated. Finally, we discuss emerging insights into structural differences among caveolin family members that enable them to support the proper functions of diverse tissues and organisms.
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Affiliation(s)
- Anne K Kenworthy
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA, U.S.A
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA, U.S.A
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3
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MacLeod KT. Changes in cellular Ca 2+ and Na + regulation during the progression towards heart failure. J Physiol 2023; 601:905-921. [PMID: 35946572 PMCID: PMC10952717 DOI: 10.1113/jp283082] [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] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 08/02/2022] [Indexed: 11/08/2022] Open
Abstract
In adapting to disease and loss of tissue, the heart shows great phenotypic plasticity that involves changes to its structure, composition and electrophysiology. Together with parallel whole body cardiovascular adaptations, the initial decline in cardiac function resulting from the insult is compensated. However, in the long term, the heart muscle begins to fail and patients with this condition have a very poor prognosis, with many dying from disturbances of rhythm. The surviving myocytes of these hearts gain Na+ , which is positively inotropic because of alterations to Ca2+ fluxes mediated by the Na+ /Ca2+ exchange, but compromises Ca2+ -dependent energy metabolism in mitochondria. Uptake of Ca2+ into the sarcoplasmic reticulum (SR) is reduced because of diminished function of SR Ca2+ ATPases. The result of increased Ca2+ influx and reduced SR Ca2+ uptake is an increase in the diastolic cytosolic Ca2+ concentration, which promotes spontaneous SR Ca2+ release and induces delayed afterdepolarisations. Action potential duration prolongs because of increased late Na+ current and changes in expression and function of other ion channels and transporters increasing the probability of the formation of early afterdepolarisations. There is a reduction in T-tubule density and so the normal spatial arrangements required for efficient excitation-contraction coupling are compromised and lead to temporal delays in Ca2+ release from the SR. Therefore, the structural and electrophysiological responses that occur to provide compensation do so at the expense of (1) increasing the likelihood of arrhythmogenesis; (2) activating hypertrophic, apoptotic and Ca2+ signalling pathways; and (3) decreasing the efficiency of SR Ca2+ release.
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Affiliation(s)
- Kenneth T. MacLeod
- National Heart & Lung InstituteImperial Centre for Translational and Experimental MedicineImperial CollegeHammersmith HospitalLondonUK
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4
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Davoudi S, Wang Q, Patel HH, Pias SC, Ghysels A. Understanding the Role of Caveolae in Oxygen Buffering: The Effect of Membrane Curvature. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1438:87-91. [PMID: 37845445 DOI: 10.1007/978-3-031-42003-0_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
The "oxygen paradox" can be explained as two opposing biological processes with oxygen (O2) as a reactant. On the one hand, oxygen is essential to aerobic metabolism, powering oxidative phosphorylation in mitochondria. On the other hand, an excess supply of oxygen will generate reactive species which are harmful for the cell. In healthy tissues, the first process must be maximized relative to the second one. We have hypothesized that curved and cholesterol-enriched membrane invaginations called caveolae help maintain the proper oxygen level by taking up oxygen and attenuating its release to the mitochondria. The mechanism by which caveolae may help to buffer the oxygen level in cells is still unclear. Here, we aim to assess how structural aspects of caveolae, the curvature of the membrane, influence the local oxygen abundance and the membrane partitioning. We have modelled a flat bilayer and a liposome composed of dipalmitoylphosphatidylcholine (DPPC), using molecular dynamics simulation. Associated changes in the membrane-level oxygen partition coefficient and free energy profiles will be presented.
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Affiliation(s)
- Samaneh Davoudi
- IBiTech - Biommeda Research Group, Ghent University, Ghent, Belgium.
| | - Qi Wang
- Department of Chemistry, New Mexico Institute of Mining and Technology (New Mexico Tech), Socorro, NM, USA
| | - Hemal H Patel
- Department of Anesthesiology, University of California, San Diego, CA, USA
| | - Sally C Pias
- Department of Chemistry, New Mexico Institute of Mining and Technology (New Mexico Tech), Socorro, NM, USA
| | - An Ghysels
- IBiTech - Biommeda Research Group, Ghent University, Ghent, Belgium
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5
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Capera J, Pérez-Verdaguer M, Peruzzo R, Navarro-Pérez M, Martínez-Pinna J, Alberola-Die A, Morales A, Leanza L, Szabó I, Felipe A. A novel mitochondrial Kv1.3-caveolin axis controls cell survival and apoptosis. eLife 2021; 10:e69099. [PMID: 34196606 PMCID: PMC8248986 DOI: 10.7554/elife.69099] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 06/22/2021] [Indexed: 12/16/2022] Open
Abstract
The voltage-gated potassium channel Kv1.3 plays an apparent dual physiological role by participating in activation and proliferation of leukocytes as well as promoting apoptosis in several types of tumor cells. Therefore, Kv1.3 is considered a potential pharmacological target for immunodeficiency and cancer. Different cellular locations of Kv1.3, at the plasma membrane or the mitochondria, could be responsible for such duality. While plasma membrane Kv1.3 facilitates proliferation, the mitochondrial channel modulates apoptotic signaling. Several molecular determinants of Kv1.3 drive the channel to the cell surface, but no information is available about its mitochondrial targeting. Caveolins, which are able to modulate cell survival, participate in the plasma membrane targeting of Kv1.3. The channel, via a caveolin-binding domain (CDB), associates with caveolin 1 (Cav1), which localizes Kv1.3 to lipid raft membrane microdomains. The aim of our study was to understand the role of such interactions not only for channel targeting but also for cell survival in mammalian cells. By using a caveolin association-deficient channel (Kv1.3 CDBless), we demonstrate here that while the Kv1.3-Cav1 interaction is responsible for the channel localization in the plasma membrane, a lack of such interaction accumulates Kv1.3 in the mitochondria. Kv1.3 CDBless severely affects mitochondrial physiology and cell survival, indicating that a functional link of Kv1.3 with Cav1 within the mitochondria modulates the pro-apoptotic effects of the channel. Therefore, the balance exerted by these two complementary mechanisms fine-tune the physiological role of Kv1.3 during cell survival or apoptosis. Our data highlight an unexpected role for the mitochondrial caveolin-Kv1.3 axis during cell survival and apoptosis.
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Affiliation(s)
- Jesusa Capera
- Molecular Physiology Laboratory, Dpt. de Bioquímica i Biomedicina Molecular, Institut de Biomedicina (IBUB), Universitat de BarcelonaBarcelonaSpain
| | - Mireia Pérez-Verdaguer
- Molecular Physiology Laboratory, Dpt. de Bioquímica i Biomedicina Molecular, Institut de Biomedicina (IBUB), Universitat de BarcelonaBarcelonaSpain
| | | | - María Navarro-Pérez
- Molecular Physiology Laboratory, Dpt. de Bioquímica i Biomedicina Molecular, Institut de Biomedicina (IBUB), Universitat de BarcelonaBarcelonaSpain
| | - Juan Martínez-Pinna
- Dept de Fisiología, Genética y Microbiología, Universidad de AlicanteAlicanteSpain
| | - Armando Alberola-Die
- Dept de Fisiología, Genética y Microbiología, Universidad de AlicanteAlicanteSpain
| | - Andrés Morales
- Dept de Fisiología, Genética y Microbiología, Universidad de AlicanteAlicanteSpain
| | - Luigi Leanza
- Department of Biology, University of PadovaPadovaItaly
| | - Ildiko Szabó
- Department of Biology, University of PadovaPadovaItaly
| | - Antonio Felipe
- Molecular Physiology Laboratory, Dpt. de Bioquímica i Biomedicina Molecular, Institut de Biomedicina (IBUB), Universitat de BarcelonaBarcelonaSpain
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Roth S, Torregroza C, Feige K, Preckel B, Hollmann MW, Weber NC, Huhn R. Pharmacological Conditioning of the Heart: An Update on Experimental Developments and Clinical Implications. Int J Mol Sci 2021; 22:ijms22052519. [PMID: 33802308 PMCID: PMC7959135 DOI: 10.3390/ijms22052519] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/26/2021] [Accepted: 02/26/2021] [Indexed: 12/13/2022] Open
Abstract
The aim of pharmacological conditioning is to protect the heart against myocardial ischemia-reperfusion (I/R) injury and its consequences. There is extensive literature that reports a multitude of different cardioprotective signaling molecules and mechanisms in diverse experimental protocols. Several pharmacological agents have been evaluated in terms of myocardial I/R injury. While results from experimental studies are immensely encouraging, translation into the clinical setting remains unsatisfactory. This narrative review wants to focus on two aspects: (1) give a comprehensive update on new developments of pharmacological conditioning in the experimental setting concentrating on recent literature of the last two years and (2) briefly summarize clinical evidence of these cardioprotective substances in the perioperative setting highlighting their clinical implications. By directly opposing each pharmacological agent regarding its recent experimental knowledge and most important available clinical data, a clear overview is given demonstrating the remaining gap between basic research and clinical practice. Finally, future perspectives are given on how we might overcome the limited translatability in the field of pharmacological conditioning.
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Affiliation(s)
- Sebastian Roth
- Department of Anesthesiology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University Duesseldorf, Moorenstr. 5, 40225 Duesseldorf, Germany; (S.R.); (K.F.); (R.H.)
| | - Carolin Torregroza
- Department of Anesthesiology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University Duesseldorf, Moorenstr. 5, 40225 Duesseldorf, Germany; (S.R.); (K.F.); (R.H.)
- Department of Anesthesiology, Amsterdam University Medical Center (AUMC), Location AMC, Meibergdreef 9, 1100 DD Amsterdam, The Netherlands; (B.P.); (M.W.H.); (N.C.W.)
- Correspondence:
| | - Katharina Feige
- Department of Anesthesiology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University Duesseldorf, Moorenstr. 5, 40225 Duesseldorf, Germany; (S.R.); (K.F.); (R.H.)
| | - Benedikt Preckel
- Department of Anesthesiology, Amsterdam University Medical Center (AUMC), Location AMC, Meibergdreef 9, 1100 DD Amsterdam, The Netherlands; (B.P.); (M.W.H.); (N.C.W.)
| | - Markus W. Hollmann
- Department of Anesthesiology, Amsterdam University Medical Center (AUMC), Location AMC, Meibergdreef 9, 1100 DD Amsterdam, The Netherlands; (B.P.); (M.W.H.); (N.C.W.)
| | - Nina C. Weber
- Department of Anesthesiology, Amsterdam University Medical Center (AUMC), Location AMC, Meibergdreef 9, 1100 DD Amsterdam, The Netherlands; (B.P.); (M.W.H.); (N.C.W.)
| | - Ragnar Huhn
- Department of Anesthesiology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University Duesseldorf, Moorenstr. 5, 40225 Duesseldorf, Germany; (S.R.); (K.F.); (R.H.)
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7
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Cantu JC, Tolstykh GP, Tarango M, Beier HT, Ibey BL. Caveolin-1 is Involved in Regulating the Biological Response of Cells to Nanosecond Pulsed Electric Fields. J Membr Biol 2021; 254:141-156. [PMID: 33427940 DOI: 10.1007/s00232-020-00160-z] [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] [Received: 06/05/2020] [Accepted: 11/18/2020] [Indexed: 01/20/2023]
Abstract
Nanosecond pulsed electric fields (nsPEFs) induce changes in the plasma membrane (PM), including PM permeabilization (termed nanoporation), allowing free passage of ions into the cell and, in certain cases, cell death. Recent studies from our laboratory show that the composition of the PM is a critical determinant of PM nanoporation. Thus, we hypothesized that the biological response to nsPEF exposure could be influenced by lipid microdomains, including caveolae, which are specialized invaginations of the PM that are enriched in cholesterol and contain aggregates of important cell signaling proteins, such as caveolin-1 (Cav1). Caveolae play a significant role in cellular signal transduction, including control of calcium influx and cell death by interaction of Cav1 with regulatory signaling proteins. Present results show that depletion of Cav1 increased the influx of calcium, while Cav1 overexpression produced the opposite effect. Additionally, Cav1 is known to bind and sequester important cell signaling proteins within caveolae, rendering the binding partners inactive. Imaging of the PM after nsPEF exposure showed localized depletion of PM Cav1 and results of co-immunoprecipitation studies showed dissociation of two critical Cav1 binding partners (transient receptor potential cation channel subfamily C1 (TRPC1) and inositol trisphosphate receptor (IP3R)) after exposure to nsPEFs. Release of TRPC1 and IP3R from Cav1 would activate downstream signaling cascades, including store-operated calcium entry, which could explain the influx in calcium after nsPEF exposure. Results of the current study establish a significant relationship between Cav1 and the activation of cell signaling pathways in response to nsPEFs.
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Affiliation(s)
- Jody C Cantu
- General Dynamics Information Technology, JBSA Fort Sam Houston, 4141 Petroleum Road, Bldg. 3260, San Antonio, TX, 78234-2644, USA.
| | - Gleb P Tolstykh
- General Dynamics Information Technology, JBSA Fort Sam Houston, 4141 Petroleum Road, Bldg. 3260, San Antonio, TX, 78234-2644, USA
| | - Melissa Tarango
- General Dynamics Information Technology, JBSA Fort Sam Houston, 4141 Petroleum Road, Bldg. 3260, San Antonio, TX, 78234-2644, USA
| | - Hope T Beier
- Air Force Research Laboratory, 711th Human Performance Wing, Airman Systems Directorate, Bioeffects Division, Optical Radiation Bioeffects Branch, JBSA Fort Sam Houston, San Antonio, TX, 78234, USA
| | - Bennett L Ibey
- Air Force Research Laboratory, 711th Human Performance Wing, Airman Systems Directorate, Bioeffects Division, Radio Frequency Bioeffects Branch, JBSA Fort Sam Houston, San Antonio, TX, 78234, USA
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8
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Torregroza C, Raupach A, Feige K, Weber NC, Hollmann MW, Huhn R. Perioperative Cardioprotection: General Mechanisms and Pharmacological Approaches. Anesth Analg 2020; 131:1765-1780. [PMID: 33186163 DOI: 10.1213/ane.0000000000005243] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cardioprotection encompasses a variety of strategies protecting the heart against myocardial injury that occurs during and after inadequate blood supply to the heart during myocardial infarction. While restoring reperfusion is crucial for salvaging myocardium from further damage, paradoxically, it itself accounts for additional cell death-a phenomenon named ischemia/reperfusion injury. Therefore, therapeutic strategies are necessary to render the heart protected against myocardial infarction. Ischemic pre- and postconditioning, by short periods of sublethal cardiac ischemia and reperfusion, are still the strongest mechanisms to achieve cardioprotection. However, it is highly impractical and far too invasive for clinical use. Fortunately, it can be mimicked pharmacologically, for example, by volatile anesthetics, noble gases, opioids, propofol, dexmedetomidine, and phosphodiesterase inhibitors. These substances are all routinely used in the clinical setting and seem promising candidates for successful translation of cardioprotection from experimental protocols to clinical trials. This review presents the fundamental mechanisms of conditioning strategies and provides an overview of the most recent and relevant findings on different concepts achieving cardioprotection in the experimental setting, specifically emphasizing pharmacological approaches in the perioperative context.
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Affiliation(s)
- Carolin Torregroza
- From the Department of Anesthesiology, University Hospital Duesseldorf, Duesseldorf, Germany.,Department of Anesthesiology, Amsterdam University Medical Centers (AUMC), Amsterdam, the Netherlands
| | - Annika Raupach
- From the Department of Anesthesiology, University Hospital Duesseldorf, Duesseldorf, Germany
| | - Katharina Feige
- From the Department of Anesthesiology, University Hospital Duesseldorf, Duesseldorf, Germany
| | - Nina C Weber
- Department of Anesthesiology, Amsterdam University Medical Centers (AUMC), Amsterdam, the Netherlands
| | - Markus W Hollmann
- Department of Anesthesiology, Amsterdam University Medical Centers (AUMC), Amsterdam, the Netherlands
| | - Ragnar Huhn
- From the Department of Anesthesiology, University Hospital Duesseldorf, Duesseldorf, Germany
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9
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Weber NC, Preckel B. Gaseous mediators: an updated review on the effects of helium beyond blowing up balloons. Intensive Care Med Exp 2019; 7:73. [PMID: 31858285 PMCID: PMC6923303 DOI: 10.1186/s40635-019-0288-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 12/09/2019] [Indexed: 12/20/2022] Open
Abstract
Noble gases, although supposed to be chemically inert, mediate numerous physiological and cellular effects, leading to protection against ischaemia-reperfusion injury in different organs. Clinically, the noble gas helium is used in treatment of airway obstruction and ventilation disorders in children and adults. In addition, studies from recent years in cells, isolated tissues, animals and finally humans show that helium has profound biological effects: helium applied before, during or after an ischaemic event reduced cellular damage, known as "organ conditioning", in some tissue, e.g. the myocardium. Although extensive research has been performed, the exact molecular mechanisms behind these organ-protective effects of helium are yet not completely understood. In addition, there are significant differences of protective effects in different organs and animal models. A translation of experimental findings to the clinical situation has yet not been shown.
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Affiliation(s)
- Nina C Weber
- Amsterdam University Medical Centers, location AMC, Meibergdreef 9, 1105 AZ, Amsterdam, the Netherlands
| | - Benedikt Preckel
- Amsterdam University Medical Centers, location AMC, Meibergdreef 9, 1105 AZ, Amsterdam, the Netherlands.
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10
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Sviridov D, Miller YI. Biology of Lipid Rafts: Introduction to the Thematic Review Series. J Lipid Res 2019; 61:598-600. [PMID: 31462515 DOI: 10.1194/jlr.in119000330] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Lipid rafts are organized plasma membrane microdomains, which provide a distinct level of regulation of cellular metabolism and response to extracellular stimuli, affecting a diverse range of physiologic and pathologic processes. This Thematic Review Series focuses on Biology of Lipid Rafts rather than on their composition or structure. The aim is to provide an overview of ideas on how lipid rafts are involved in regulation of different pathways and how they interact with other layers of metabolic regulation. Articles in the series will review the involvement of lipid rafts in regulation of hematopoiesis, production of extracellular vesicles, host interaction with infection, and the development and progression of cancer, neuroinflammation, and neurodegeneration, as well as the current outlook on therapeutic targeting of lipid rafts.
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Affiliation(s)
- Dmitri Sviridov
- Baker Heart and Diabetes Institute, Melbourne, VIC, Australia.
| | - Yury I Miller
- Department of Medicine, University of California, San Diego, La Jolla, CA
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11
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Okada S, Raja SA, Okerblom J, Boddu A, Horikawa Y, Ray S, Okada H, Kawamura I, Murofushi Y, Murray F, Patel HH. Deletion of caveolin scaffolding domain alters cancer cell migration. Cell Cycle 2019; 18:1268-1280. [PMID: 31116089 DOI: 10.1080/15384101.2019.1618118] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Caveolin-1 (Cav-1) is an integral membrane protein that plays an important role in proliferative and terminally differentiated cells. As a structural component of Caveolae, Cav-1 interacts with signaling molecules via a caveolin scaffolding domain (CSD) regulating cell signaling. Recent reports have shown that Cav-1 is a negative regulator in tumor metastasis. Therefore, we hypothesize that Cav-1 inhibits cell migration through its CSD. HeLa cells were engineered to overexpress Cav-1 (Cav-1 OE), Cav-1 without a functional CSD (∆CSD), or enhanced green fluorescent protein (EGFP) as a control. HeLa cell migration was suppressed in Cav-1 OE cells while ∆CSD showed increased migration, which corresponded to a decrease in the tight junction protein, zonula occludens (ZO-1). The migration phenotype was confirmed in multiple cancer cell lines. Phosphorylated STAT-3 was decreased in Cav-1 OE cells compared to control and ∆CSD cells; reducing STAT-3 expression alone decreased cell migration. ∆CSD blunted HeLa proliferation by increasing the number of cells in the G2/M phase of the cell cycle. Overexpressing the CSD peptide alone suppressed HeLa cell migration and inhibited pSTAT3. These findings suggest that Cav-1 CSD may be critical in controlling the dynamic phenotype of cancer cells by facilitating the interaction of specific signal transduction pathways, regulating STAT3 and participating in a G2/M checkpoint. Modulating the CSD and targeting specific proteins may offer potential new therapies in the treatment of cancer metastasis.
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Affiliation(s)
- Sunaho Okada
- a Veterans Administration San Diego Healthcare System , San Diego , CA , USA.,b Department of Anesthesiology and UCSD School of Medicine , San Diego , CA , USA
| | - Sadaf A Raja
- c Department of Biosciences , COMSATS Institute of Information Technology , Islamabad , Pakistan
| | - Jonathan Okerblom
- a Veterans Administration San Diego Healthcare System , San Diego , CA , USA.,b Department of Anesthesiology and UCSD School of Medicine , San Diego , CA , USA
| | - Aayush Boddu
- a Veterans Administration San Diego Healthcare System , San Diego , CA , USA.,b Department of Anesthesiology and UCSD School of Medicine , San Diego , CA , USA
| | - Yousuke Horikawa
- d Department of Pediatrics , Sharp Rees-Stealy Medical Group , San Diego , CA , USA.,e Department of Anesthesiology , Tokushima University , Tokushima , Japan
| | | | - Hideshi Okada
- a Veterans Administration San Diego Healthcare System , San Diego , CA , USA.,g Department of Anesthesiology and Medicine , UCSD School of Medicine , San Diego , CA , USA.,h Department of Emergency and Disaster Medicine , Gifu University Graduate School of Medicine , Gifu , Japan
| | - Itta Kawamura
- i Department of Cardiovascular Medicine , Gifu Heart Center , Gifu , Japan
| | - Yoshiteru Murofushi
- g Department of Anesthesiology and Medicine , UCSD School of Medicine , San Diego , CA , USA
| | - Fiona Murray
- j Aberdeen Cardiovascular & Diabetes Centre, School of Medicine, Medical Sciences & Nutrition, Institute of Medical Sciences , University of Aberdeen , Aberdeen , Scotland
| | - Hemal H Patel
- a Veterans Administration San Diego Healthcare System , San Diego , CA , USA.,b Department of Anesthesiology and UCSD School of Medicine , San Diego , CA , USA
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12
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Li HZ, Chen JF, Liu M, Shen J. Effect of hyperbaric oxygen on the permeability of the blood-brain barrier in rats with global cerebral ischemia/reperfusion injury. Biomed Pharmacother 2018; 108:1725-1730. [PMID: 30372875 DOI: 10.1016/j.biopha.2018.10.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/19/2018] [Accepted: 10/04/2018] [Indexed: 01/22/2023] Open
Abstract
OBJECTIVE The aim of this study was to investigate the effects of hyperbaric oxygen on the permeability of the blood-brain barrier in rats with global cerebral ischemia/reperfusion injury and explore possible mechanisms. METHODS A rat model of global cerebral ischemia/reperfusion injury established via Pulsinelli four-vessel occlusion method and a total of 162 Wistar rats were randomly divided into three groups, including sham group, global cerebral ischemia/reperfusion group (IR group) and hyperbaric oxygen treated group (HBO group). Permeability of the blood-brain barrier of these rats were evaluated by Evans Blue staining. The expression of caveolin-1 and tight junction protein ZO-1 was examined by Immunohistochemistry staining and western-blotting. RESULTS Successfully establishment of the rat model was verified by W:D ratio, and significantly increased Evans Blue level was found in IR group compared to control group, whereas hyperbaric treatment could result in decreased Evans Blue level in HBO group. Increased expression of caveolin-1 and tight junction protein ZO-1 were found in rats with hyperbaric oxygen exposure compared to those in IS group. CONCLUSIONS Hyperbaric oxygen exposure improved the permeability of the blood-brain barrier in rats with global cerebral ischemia/reperfusion injury, and increased expression of caveolin-1 and tight junction protein ZO-1 were involved in the mechanisms.
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Affiliation(s)
- Hong-Zhi Li
- Center of Emergency & Intensive Care Unit, Shanghai, 201508, PR China; Medical Center of Chemical Injury, Shanghai, 201508, PR China; Medical Research Centre for Chemical Injury, Emergency and Critical Care, Jinshan Hospital, Fudan University, Shanghai, 201508, PR China
| | - Jun-Feng Chen
- Center of Emergency & Intensive Care Unit, Shanghai, 201508, PR China; Medical Center of Chemical Injury, Shanghai, 201508, PR China; Medical Research Centre for Chemical Injury, Emergency and Critical Care, Jinshan Hospital, Fudan University, Shanghai, 201508, PR China
| | - Ming Liu
- Center of Emergency & Intensive Care Unit, Shanghai, 201508, PR China; Medical Center of Chemical Injury, Shanghai, 201508, PR China; Medical Research Centre for Chemical Injury, Emergency and Critical Care, Jinshan Hospital, Fudan University, Shanghai, 201508, PR China
| | - Jie Shen
- Center of Emergency & Intensive Care Unit, Shanghai, 201508, PR China; Medical Center of Chemical Injury, Shanghai, 201508, PR China; Medical Research Centre for Chemical Injury, Emergency and Critical Care, Jinshan Hospital, Fudan University, Shanghai, 201508, PR China.
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13
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Morris CE. Cytotoxic Swelling of Sick Excitable Cells - Impaired Ion Homeostasis and Membrane Tension Homeostasis in Muscle and Neuron. CURRENT TOPICS IN MEMBRANES 2018; 81:457-496. [PMID: 30243439 DOI: 10.1016/bs.ctm.2018.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
When they become simultaneously leaky to both Na+ and Cl-, excitable cells are vulnerable to potentially lethal cytotoxic swelling. Swelling ensues in spite of an isosmotic milieu because the entering ions add osmolytes to the cytoplasm's high concentration of impermeant anionic osmolytes. An influx of osmotically-obliged water is unavoidable. A cell that cannot stanch at least one the leaks will succumb to death by Donnan effect. "Sick excitable cells" are those injured through ischemia, trauma, inflammation, hyperactivity, genetically-impaired membrane skeletons and other insults, all of which foster bleb-damage to regions of the plasma membrane. Nav channels resident in damaged membrane exhibit left-shifted kinetics; the corresponding Nav window conductance constitutes a Na+-leak. In cortical neurons, sustained depolarization to ∼-20mV elicits a sustained lethal gCl. Underlying Vrest in skeletal muscle is a constitutively active gCl; not surprisingly therefore, dystrophic muscle fibers, which are prone to bleb damage and which exhibit Nav-leak and Na+-overload, are prone to cytotoxic swelling. To restore viability in cytotoxically swelling neurons and muscle, the imperative of fully functional ion homeostasis is well-recognized. However, as emphasized here, in a healthy excitable cell, fully functional membrane tension homeostasis is also imperative. ATPase-pumps keep plasma membrane batteries charged, and ATPase-motor proteins maintain membrane tone. In sick excitable cells, neither condition prevails.
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Affiliation(s)
- Catherine E Morris
- Senior Scientist Emeritus, Neuroscience, Ottawa Hospital Research Institute, Ottawa, ON, Canada
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