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Ma S, Cahalan S, LaMonte G, Grubaugh ND, Zeng W, Murthy SE, Paytas E, Gamini R, Lukacs V, Whitwam T, Loud M, Lohia R, Berry L, Khan SM, Janse CJ, Bandell M, Schmedt C, Wengelnik K, Su AI, Honore E, Winzeler EA, Andersen KG, Patapoutian A. Common PIEZO1 Allele in African Populations Causes RBC Dehydration and Attenuates Plasmodium Infection. Cell 2018; 173:443-455.e12. [PMID: 29576450 DOI: 10.1016/j.cell.2018.02.047] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 01/06/2018] [Accepted: 02/14/2018] [Indexed: 01/05/2023]
Abstract
Hereditary xerocytosis is thought to be a rare genetic condition characterized by red blood cell (RBC) dehydration with mild hemolysis. RBC dehydration is linked to reduced Plasmodium infection in vitro; however, the role of RBC dehydration in protection against malaria in vivo is unknown. Most cases of hereditary xerocytosis are associated with gain-of-function mutations in PIEZO1, a mechanically activated ion channel. We engineered a mouse model of hereditary xerocytosis and show that Plasmodium infection fails to cause experimental cerebral malaria in these mice due to the action of Piezo1 in RBCs and in T cells. Remarkably, we identified a novel human gain-of-function PIEZO1 allele, E756del, present in a third of the African population. RBCs from individuals carrying this allele are dehydrated and display reduced Plasmodium infection in vitro. The existence of a gain-of-function PIEZO1 at such high frequencies is surprising and suggests an association with malaria resistance.
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Affiliation(s)
- Shang Ma
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Stuart Cahalan
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Gregory LaMonte
- Division of Host-Microbe Systems & Therapeutics, Department of Pediatrics, University of California, San Diego, San Diego, CA, USA
| | - Nathan D Grubaugh
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
| | - Weizheng Zeng
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Swetha E Murthy
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Emma Paytas
- Division of Host-Microbe Systems & Therapeutics, Department of Pediatrics, University of California, San Diego, San Diego, CA, USA
| | - Ramya Gamini
- Department of Integrative, Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, USA
| | - Viktor Lukacs
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Tess Whitwam
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Meaghan Loud
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Rakhee Lohia
- DIMNP, CNRS, INSERM, University Montpellier, Montpellier, France
| | - Laurence Berry
- DIMNP, CNRS, INSERM, University Montpellier, Montpellier, France
| | - Shahid M Khan
- Leiden Malaria Research Group, Department of Parasitology, Leiden University Medical Center (LUMC), 2333ZA Leiden, the Netherlands
| | - Chris J Janse
- Leiden Malaria Research Group, Department of Parasitology, Leiden University Medical Center (LUMC), 2333ZA Leiden, the Netherlands
| | - Michael Bandell
- Genomics Institute of the Novartis Research Foundation, La Jolla, CA, USA
| | - Christian Schmedt
- Genomics Institute of the Novartis Research Foundation, La Jolla, CA, USA
| | - Kai Wengelnik
- DIMNP, CNRS, INSERM, University Montpellier, Montpellier, France
| | - Andrew I Su
- Department of Integrative, Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, USA
| | - Eric Honore
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Paris, France; Institut de Pharmacologie Moléculaire et Cellulaire, Labex ICST, Valbonne, France
| | - Elizabeth A Winzeler
- Division of Host-Microbe Systems & Therapeutics, Department of Pediatrics, University of California, San Diego, San Diego, CA, USA
| | - Kristian G Andersen
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA; Department of Integrative, Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, USA
| | - Ardem Patapoutian
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA.
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Chemin J, Patel AJ, Duprat F, Sachs F, Lazdunski M, Honore E. Up- and down-regulation of the mechano-gated K(2P) channel TREK-1 by PIP (2) and other membrane phospholipids. Pflugers Arch 2007; 455:97-103. [PMID: 17384962 DOI: 10.1007/s00424-007-0250-2] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2006] [Accepted: 03/02/2007] [Indexed: 11/28/2022]
Abstract
TREK-1 is an unconventional K(+) channel that is activated by both physical and chemical stimuli. In this study, we show that the inner leaflet membrane phospholipids, including PIP(2), exert a mixed stimulatory and inhibitory effect on TREK-1. Intra-cellular phospholipids inhibit basal channel activity and activation by membrane stretch, intra-cellular acidosis and arachidonic acid. However, binding of endogenous negative inner leaflet phospholipids with poly-lysine reduces inhibition and reveals channel stimulation by exogenous intra-cellular phospholipids. A similar effect is observed with PI, PE, PS and PA, unlike DG, demonstrating that the phosphate at position 3 is required although the global charge of the molecule is not critical. Inhibition depends on the distal C-terminal domain that conditions channel mechano-sensitivity, but is independent of the positively charged PIP(2) stimulatory site in the proximal C-terminal domain. This is, to our knowledge, the first report of an ion channel dually regulated by membrane phospholipids.
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Affiliation(s)
- Jean Chemin
- Institut de Génomique Fonctionnelle, UPR 2580 CNRS, 141 rue de la Cardonille, 34094, Montpellier cedex 05, France
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Giamarchi A, Padilla F, Crest M, Honore E, Delmas P. TRPP2: Ca2+-permeable cation channel and more. Cell Mol Biol (Noisy-le-grand) 2006; 52:105-14. [PMID: 17535744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2006] [Accepted: 09/30/2006] [Indexed: 05/15/2023]
Abstract
TRPP2 (polycystin-2) is a member of the TRP family of non-selective cation channels that is mutated in human autosomal polycystic kidney disease. It is thought to function together with polycystin-1 (PKD1), a large plasma membrane integral protein, as part of a multiprotein complex involved in transducing Ca2+-dependent mechanosensitive information in renal epithelial cells. TRPP2 has been implicated in Ca2+-dependent pathways in a variety of biological functions and species, including cell proliferation, sperm fertilization, mating behavior and asymmetric gene expression. Although its function as a Ca2+-permeable cation channel is well established, its precise role, regulation and subcellular localization in plasma membrane, endoplasmic reticulum and cilium have remained controversial. The present review summarizes the most pertinent recent evidence regarding the structural and functional properties of TRPP2 channels, focusing on the regulation and physiology of mammalian TRPP2.
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Affiliation(s)
- A Giamarchi
- Laboratoire de Neurophysiologie Cellulaire, CNRS, UMR 6150, Faculté de Médecine IFR Jean Roche, Marseille Cedex 20, France
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Buckler KJ, Williams BA, Honore E. An oxygen-, acid- and anaesthetic-sensitive TASK-like background potassium channel in rat arterial chemoreceptor cells. J Physiol 2000; 525 Pt 1:135-42. [PMID: 10811732 PMCID: PMC2269923 DOI: 10.1111/j.1469-7793.2000.00135.x] [Citation(s) in RCA: 333] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The biophysical and pharmacological properties of an oxygen-sensitive background K+ current in rat carotid body type-I cells were investigated and compared with those of recently cloned two pore domain K+ channels. Under symmetrical K+ conditions the oxygen-sensitive whole cell K+ current had a linear dependence on voltage indicating a lack of intrinsic voltage sensitivity. Single channel recordings identified a K+ channel, open at resting membrane potentials, that was inhibited by hypoxia. This channel had a single channel conductance of 14 pS, flickery kinetics and showed little voltage sensitivity except at extreme positive potentials. Oxygen-sensitive current was inhibited by 10 mM barium (57% inhibition), 200 microM zinc (53% inhibition), 200 microM bupivacaine (55% inhibition) and 1 mM quinidine (105 % inhibition). The general anaesthetic halothane (1.5%) increased the oxygen-sensitive K+ current (by 176%). Halothane (3 mM) also stimulated single channel activity in inside-out patches (by 240%). Chloroform had no effect on background K+ channel activity. Acidosis (pH 6.4) inhibited the oxygen-sensitive background K+ current (by 56%) and depolarised type-I cells. The pharmacological and biophysical properties of the background K+ channel are, therefore, analogous to those of the cloned channel TASK-1. Using in situ hybridisation TASK-1 mRNA was found to be expressed in type-I cells. We conclude that the oxygen- and acid-sensitive background K+ channel of carotid body type-I cells is likely to be an endogenous TASK-1-like channel.
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Affiliation(s)
- K J Buckler
- University Laboratory of Physiology, Parks Road, Oxford OX1 3PT, UK.
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Duprat F, Guillemare E, Romey G, Fink M, Lesage F, Lazdunski M, Honore E. Susceptibility of cloned K+ channels to reactive oxygen species. Proc Natl Acad Sci U S A 1995; 92:11796-800. [PMID: 8524851 PMCID: PMC40489 DOI: 10.1073/pnas.92.25.11796] [Citation(s) in RCA: 140] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Free radical-induced oxidant stress has been implicated in a number of physiological and pathophysiological states including ischemia and reperfusion-induced dysrhythmia in the heart, apoptosis of T lymphocytes, phagocytosis, and neurodegeneration. We have studied the effects of oxidant stress on the native K+ channel from T lymphocytes and on K+ channels cloned from cardiac, brain, and T-lymphocyte cells and expressed in Xenopus oocytes. The activity of three Shaker K+ channels (Kv1.3, Kv1.4, and Kv1.5), one Shaw channel (Kv3.4), and one inward rectifier K+ channel (IRK3) was drastically inhibited by photoactivation of rose bengal, a classical generator of reactive oxygen species. Other channel types (such as Shaker K+ channel Kv1.2, Shab channels Kv2.1 and Kv2.2, Shal channel Kv4.1, inward rectifiers IRK1 and ROMK1, and hIsK) were completely resistant to this treatment. On the other hand tert-butyl hydroperoxide, another generator of reactive oxygen species, removed the fast inactivation processes of Kv1.4 and Kv3.4 but did not alter other channels. Xanthine/xanthine oxidase system had no effect on all channels studied. Thus, we show that different types of K+ channels are differently modified by reactive oxygen species, an observation that might be of importance in disease states.
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Affiliation(s)
- F Duprat
- Institut de Pharmacologie Moléculaire et Cellulaire, Valbonne, France
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Guillemare E, Honore E, De Weille J, Fosset M, Lazdunski M, Meisheri K. Functional receptors in Xenopus oocytes for U-37883A, a novel ATP-sensitive K+ channel blocker: comparison with rat insulinoma cells. Mol Pharmacol 1994; 46:139-45. [PMID: 8058048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Follicle-enclosed Xenopus oocytes were used to describe the ATP-sensitive K+ (KATP) channel-blocking properties of U-37883A (4-morpholinecarboximidine-N-1-adamantyl-N'-cyclohexyl), in comparison with glibenclamide. In follicular oocytes, the KATP channel opener P1060 (30 microM), a pinacidil analog, activated a large outward K+ current that was blocked by glibenclamide (IC50 = 0.33 microM) and U-37883A (IC50 = 0.26 microM). P1060 activation was inhibited by both U-37883A and glibenclamide in a noncompetitive manner. U-37883A also blocked the KATP channel activation by cAMP (300 microM) and adenosine (10 microM). Single-channel studies on isolated follicular cells showed that U-37883A (10 microM) reduced the open probability of the KATP channel by 76%, without significantly modifying the single-channel current amplitude. Receptor binding studies with [3H]U-37883 in membranes from follicle-enclosed oocytes demonstrated a single class of low affinity binding sites, with a Kd of 450 nM and a Bmax of 17 pmol/mg of protein. Studies with analogs of U-37883A showed that U-52090A inhibited KATP current and displaced [3H]U-37883 from its binding site with similar potencies. In contrast, U-42069D neither inhibited KATP current nor competed with [3H]U-37883 binding. In RINm5F cells (an insulinoma cell line), U-37883A, unlike glibenclamide, failed to inhibit KATP current. Furthermore, there was no significant specific binding of [3H]U-37883 in RINm5F cell membranes, which displayed high levels of specific binding of [3H]glibenclamide. These data demonstrate the presence of a receptor for U-37883A-type guanidines that controls the activity of the endogenous KATP channels in follicle-enclosed oocytes. The available data collectively suggest that U-37883A is a more selective blocker of the follicular KATP channel, which is very similar to that in smooth muscle, than of the pancreatic beta cell KATP channel.
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Affiliation(s)
- E Guillemare
- Institut de Pharmacologie Moleculaire et Cellulaire, Centre Nationale de la Recherche Scientifique, Valbonne, France
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Rouet R, Libersa CC, Broly F, Caron JF, Adamantidis MM, Honore E, Wajman A, Dupuis BA. Comparative electrophysiological effects of propafenone, 5-hydroxy-propafenone, and N-depropylpropafenone on guinea pig ventricular muscle fibers. J Cardiovasc Pharmacol 1989; 14:577-84. [PMID: 2478771 DOI: 10.1097/00005344-198910000-00009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Propafenone (Pf) is a class I antiarrhythmic drug that can be given both orally and intravenously. In order to examine whether its two major metabolites [5-hydroxypropafenone (5-OH-Pf) and N-depropylpropafenone (N-DP-Pf)] possess pharmacodynamical properties, we compared their electrophysiological effects to those of the parent drug on papillary muscle fibers from guinea pig ventricular myocardium. After baseline action potential and refractory period characteristics were measured at different pacing rates, the tissue preparations were superfused with either Pf, 5-OH-Pf, or N-DP-Pf at five different concentrations and electrophysiological characteristics were studied again. The maximal rate of depolarization (Vmax) was depressed by the three compounds only at the highest concentration, although the effect of N-DP-Pf was slightly less than the other two. Refractory periods were altered only by the highest concentration of 5-OH-Pf. Propafenone and N-DP-Pf exhibited equally slow on-set/off-set kinetics of the sodium channel block, whereas those of 5-OH-Pf were twice as long, which seems to suggest a slower rate of dissociation of the latter from the inactivated sodium channels. Thus, 5-OH-Pf and N-DP-Pf comply with the definition of the class IC antiarrhythmic drugs. The cumulative in vivo effects of the two metabolites and of the parent drug could have far reaching clinical implications, especially in the genetically predisposed extensive metabolizing subject.
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Affiliation(s)
- R Rouet
- Hospital Pharmacology Laboratory, Faculté de Médecine, Lille, France
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