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Jain R, Wade G, Ong I, Chaurasia B, Simcox J. Determination of tissue contributions to the circulating lipid pool in cold exposure via systematic assessment of lipid profiles. J Lipid Res 2022; 63:100197. [PMID: 35300982 PMCID: PMC9234243 DOI: 10.1016/j.jlr.2022.100197] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/21/2022] [Accepted: 02/27/2022] [Indexed: 01/07/2023] Open
Abstract
Plasma lipid levels are altered in chronic conditions such as type 2 diabetes and cardiovascular disease as well as during acute stresses such as fasting and cold exposure. Advances in MS-based lipidomics have uncovered a complex plasma lipidome of more than 500 lipids that serve functional roles, including as energy substrates and signaling molecules. This plasma lipid pool is maintained through regulation of tissue production, secretion, and uptake. A major challenge in understanding the lipidome complexity is establishing the tissues of origin and uptake for various plasma lipids, which is valuable for determining lipid functions. Using cold exposure as an acute stress, we performed global lipidomics on plasma and in nine tissues that may contribute to the circulating lipid pool. We found that numerous species of plasma acylcarnitines (ACars) and ceramides (Cers) were significantly altered upon cold exposure. Through computational assessment, we identified the liver and brown adipose tissue as major contributors and consumers of circulating ACars, in agreement with our previous work. We further identified the kidney and intestine as novel contributors to the circulating ACar pool and validated these findings with gene expression analysis. Regression analysis also identified that the brown adipose tissue and kidney are interactors with the plasma Cer pool. Taken together, these studies provide an adaptable computational tool to assess tissue contribution to the plasma lipid pool. Our findings have further implications in understanding the function of plasma ACars and Cers, which are elevated in metabolic diseases.
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Affiliation(s)
- Raghav Jain
- Department of Biochemistry, University of Wisconsin-Madison, Wisconsin, USA
| | - Gina Wade
- Department of Biochemistry, University of Wisconsin-Madison, Wisconsin, USA
| | - Irene Ong
- Department of Biostatistics and Medical Informatics, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, Wisconsin, USA
| | - Bhagirath Chaurasia
- Division of Endocrinology, Department of Internal Medicine, Carver College of Medicine, Fraternal Order of Eagles Diabetes Research Center, University of Iowa, Iowa, USA
| | - Judith Simcox
- Department of Biochemistry, University of Wisconsin-Madison, Wisconsin, USA.
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2
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Dutta P, Ray K. Ciliary membrane, localised lipid modification and cilia function. J Cell Physiol 2022; 237:2613-2631. [PMID: 35661356 DOI: 10.1002/jcp.30787] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 05/06/2022] [Accepted: 05/11/2022] [Indexed: 11/08/2022]
Abstract
Cilium, a tiny microtubule-based cellular appendage critical for cell signalling and physiology, displays a large variety of receptors. The composition and turnover of ciliary lipids and receptors determine cell behaviour. Due to the exclusion of ribosomal machinery and limited membrane area, a cilium needs adaptive logistics to actively reconstitute the lipid and receptor compositions during development and differentiation. How is this dynamicity generated? Here, we examine whether, along with the Intraflagellar-Transport, targeted changes in sector-wise lipid composition could control the receptor localisation and functions in the cilia. We discuss how an interplay between ciliary lipid composition, localised lipid modification, and receptor function could contribute to cilia growth and signalling. We argue that lipid modification at the cell-cilium interface could generate an added thrust for a selective exchange of membrane lipids and the transmembrane and membrane-associated proteins.
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Affiliation(s)
- Priya Dutta
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, India
| | - Krishanu Ray
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, India
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3
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Lipid Self-Assemblies under the Atomic Force Microscope. Int J Mol Sci 2021; 22:ijms221810085. [PMID: 34576248 PMCID: PMC8467407 DOI: 10.3390/ijms221810085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 12/13/2022] Open
Abstract
Lipid model membranes are important tools in the study of biophysical processes such as lipid self-assembly and lipid–lipid interactions in cell membranes. The use of model systems to adequate and modulate complexity helps in the understanding of many events that occur in cellular membranes, that exhibit a wide variety of components, including lipids of different subfamilies (e.g., phospholipids, sphingolipids, sterols…), in addition to proteins and sugars. The capacity of lipids to segregate by themselves into different phases at the nanoscale (nanodomains) is an intriguing feature that is yet to be fully characterized in vivo due to the proposed transient nature of these domains in living systems. Model lipid membranes, instead, have the advantage of (usually) greater phase stability, together with the possibility of fully controlling the system lipid composition. Atomic force microscopy (AFM) is a powerful tool to detect the presence of meso- and nanodomains in a lipid membrane. It also allows the direct quantification of nanomechanical resistance in each phase present. In this review, we explore the main kinds of lipid assemblies used as model membranes and describe AFM experiments on model membranes. In addition, we discuss how these assemblies have extended our knowledge of membrane biophysics over the last two decades, particularly in issues related to the variability of different model membranes and the impact of supports/cytoskeleton on lipid behavior, such as segregated domain size or bilayer leaflet uncoupling.
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4
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Lim J, Li X, Yuan X, Yang S, Han L, Yang S. Primary cilia control cell alignment and patterning in bone development via ceramide-PKCζ-β-catenin signaling. Commun Biol 2020; 3:45. [PMID: 31988398 PMCID: PMC6985158 DOI: 10.1038/s42003-020-0767-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 12/16/2019] [Indexed: 02/01/2023] Open
Abstract
Intraflagellar transport (IFT) proteins are essential for cilia assembly and function. IFT protein mutations lead to ciliopathies, which manifest as variable skeletal abnormalities. However, how IFT proteins regulate cell alignment during bone development is unknown. Here, we show that the deletion of IFT20 in osteoblast lineage using Osterix-Cre and inducible type I Collagen-CreERT cause a compromised cell alignment and a reduced bone mass. This finding was validated by the disorganized collagen fibrils and decreased bone strength and stiffness in IFT20-deficient femurs. IFT20 maintains cilia and cell alignment in osteoblasts, as the concentric organization of three-dimensional spheroids was disrupted by IFT20 deletion. Mechanistically, IFT20 interacts with the ceramide-PKCζ complex to promote PKCζ phosphorylation in cilia and induce the apical localization of β-catenin in osteoblasts, both of which were disrupted in the absence of IFT20. These results reveal that IFT20 regulates polarity and cell alignment via ceramide-pPKCζ-β-catenin signaling during bone development.
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Affiliation(s)
- Jormay Lim
- Department of Anatomy and Cell Biology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA 19104, USA
| | - Xinhua Li
- Department of Anatomy and Cell Biology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA 19104, USA
| | - Xue Yuan
- Department of Oral Biology, State University of New York at Buffalo, School of Dental Medicine, Buffalo, NY, USA
| | - Shuting Yang
- Department of Anatomy and Cell Biology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA 19104, USA
| | - Lin Han
- Department of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, USA
| | - Shuying Yang
- Department of Anatomy and Cell Biology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA 19104, USA.
- Department of Oral Biology, State University of New York at Buffalo, School of Dental Medicine, Buffalo, NY, USA.
- The Penn Center for Musculoskeletal Disorders, University of Pennsylvania, School of Medicine, Philadelphia, PA, 19104, USA.
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5
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Ceramide Domains in Health and Disease: A Biophysical Perspective. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1159:79-108. [DOI: 10.1007/978-3-030-21162-2_6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Bieberich E. Sphingolipids and lipid rafts: Novel concepts and methods of analysis. Chem Phys Lipids 2018; 216:114-131. [PMID: 30194926 PMCID: PMC6196108 DOI: 10.1016/j.chemphyslip.2018.08.003] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/20/2018] [Accepted: 08/25/2018] [Indexed: 12/12/2022]
Abstract
About twenty years ago, the functional lipid raft model of the plasma membrane was published. It took into account decades of research showing that cellular membranes are not just homogenous mixtures of lipids and proteins. Lateral anisotropy leads to assembly of membrane domains with specific lipid and protein composition regulating vesicular traffic, cell polarity, and cell signaling pathways in a plethora of biological processes. However, what appeared to be a clearly defined entity of clustered raft lipids and proteins became increasingly fluid over the years, and many of the fundamental questions about biogenesis and structure of lipid rafts remained unanswered. Experimental obstacles in visualizing lipids and their interactions hampered progress in understanding just how big rafts are, where and when they are formed, and with which proteins raft lipids interact. In recent years, we have begun to answer some of these questions and sphingolipids may take center stage in re-defining the meaning and functional significance of lipid rafts. In addition to the archetypical cholesterol-sphingomyelin raft with liquid ordered (Lo) phase and the liquid-disordered (Ld) non-raft regions of cellular membranes, a third type of microdomains termed ceramide-rich platforms (CRPs) with gel-like structure has been identified. CRPs are "ceramide rafts" that may offer some fresh view on the membrane mesostructure and answer several critical questions for our understanding of lipid rafts.
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Affiliation(s)
- Erhard Bieberich
- Department of Physiology at the University of Kentucky, Lexington, KY, United States.
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Koubek EJ, Weissenrieder JS, Neighbors JD, Hohl RJ. Schweinfurthins: Lipid Modulators with Promising Anticancer Activity. Lipids 2018; 53:767-784. [DOI: 10.1002/lipd.12088] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 08/30/2018] [Accepted: 08/31/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Emily J. Koubek
- Departments of Medicine and Pharmacology, The Pennsylvania State Cancer Institute; The Pennsylvania State College of Medicine, 500 University Drive Hershey; Hershey PA 17033 USA
| | - Jillian S. Weissenrieder
- Departments of Medicine and Pharmacology; The Pennsylvania State College of Medicine, 500 University Drive Hershey; Hershey PA 17033 USA
| | - Jeffrey D. Neighbors
- Departments of Pharmacology and Medicine; The Pennsylvania State College of Medicine, 500 University Drive Hershey; Hershey PA 17033 USA
| | - Raymond J. Hohl
- Departments of Medicine and Pharmacology, The Pennsylvania State Cancer Institute; The Pennsylvania State College of Medicine, 500 University Drive Hershey; Hershey PA 17033 USA
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8
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Visualization of ceramide channels in lysosomes following endogenous palmitoyl-ceramide accumulation as an initial step in the induction of necrosis. Biochem Biophys Rep 2017; 11:174-181. [PMID: 28955782 PMCID: PMC5614681 DOI: 10.1016/j.bbrep.2017.02.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 02/07/2017] [Accepted: 02/27/2017] [Indexed: 02/07/2023] Open
Abstract
In this study, we showed that the dual addition of glucosyl ceramide synthase and ceramidase inhibitors to A549 cell culture led to the possibility of ceramide channel formation via endogenous palmitoyl-ceramide accumulation with an increase in cholesterol contents in the lysosome membrane as an initial step prior to initiation of necrotic cell death. In addition, the dual addition led to black circular structures of 10-20 nm, interpreted as stain-filled cylindrical channels on transmission electron microscopy. The formation of palmitoyl-ceramide channels in the lysosome membrane causes the liberation of cathepsin B from lysosomes for necrotic cell death. On the other hand, necrotic cell death in the dual addition was not caused by oxidative stress or cathepsin B activity, and the cell death was free from the contribution of the translation of Bax protein to the lysosome membrane.
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Key Words
- APCI, atmospheric pressure chemical ionization
- Bax, BCL2-associated X protein
- C16:0-Cer, palmitoyl-Cer
- CA-74Me, [(2S,3S)-3-Propylcarbamoyloxirane-2-carbonyl]-L-isoleucyl-L-proline methyl ester
- Cer, ceramide
- CerS, ceramide synthase
- D-NMAPPD, N-[(1R,2R)-2-hydroxy-1-(hydroxy-methyl)-2-(4-nitrophenyl)ethyl]tetradecanamide
- DAPI, 4′,6-diamidino-2-phenylindole
- DL-PDMP, DL-threo-1-phenyl-2-decanoylamino-3-morpholino-1-propanol
- DMEM, Dulbecco's modified Eagle's medium
- DMSO, dimethyl sulfoxide
- DTT, dithiothreitol
- ECL, enhanced chemiluminescence reagent
- FBS, fetal bovine serum
- GlcCer, glucosyl ceramide
- ISs, internal standards
- LAMP-2, lysosome-associated membrane protein 2
- LC3B, autophagosomal membrane bound-microtubule-associated protein 1 light chain 3B
- LMP, lysosomal membrane permeability
- MS, mass spectrometry
- NAC, N-acetyl-L-cysteine
- PBS, phosphate buffered saline
- SDS-PAGE, sodium dodecyl sulfate-polyacrylamide gel electrophoresis
- SIM, selected ion monitoring
- [D7]d18:0, D-erythro-sphinganine-D7
- [D7]d18:1, D-erythro-sphingosine-D7
- acridine orange, 3,6-Bis(dimethylamino) acridine hydrochloride
- d18:0, sphinganine
- d18:1, sphingosine
- d18:1-[D31]C16:0-Cer, N-palmitoyl [D31]-D-erythro-sphingosine
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Varsano N, Dadosh T, Kapishnikov S, Pereiro E, Shimoni E, Jin X, Kruth HS, Leiserowitz L, Addadi L. Development of Correlative Cryo-soft X-ray Tomography and Stochastic Reconstruction Microscopy. A Study of Cholesterol Crystal Early Formation in Cells. J Am Chem Soc 2016; 138:14931-14940. [PMID: 27934213 DOI: 10.1021/jacs.6b07584] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We have developed a high resolution correlative method involving cryo-soft X-ray tomography (cryo-SXT) and stochastic optical reconstruction microscopy (STORM), which provides information in three dimensions on large cellular volumes at 70 nm resolution. Cryo-SXT morphologically identified and localized aggregations of carbon-rich materials. STORM identified specific markers on the desired epitopes, enabling colocalization between the identified objects, in this case cholesterol crystals, and the cellular environment. The samples were studied under ambient and cryogenic conditions without dehydration or heavy metal staining. The early events of cholesterol crystal development were investigated in relation to atherosclerosis, using as model macrophage cell cultures enriched with LDL particles. Atherosclerotic plaques build up in arteries in a slow process involving cholesterol crystal accumulation. Cholesterol crystal deposition is a crucial stage in the pathological cascade. Our results show that cholesterol crystals can be identified and imaged at a very early stage on the cell plasma membrane and in intracellular locations. This technique can in principle be applied to other biological samples where specific molecular identification is required in conjunction with high resolution 3D-imaging.
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Affiliation(s)
| | | | - Sergey Kapishnikov
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin , Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Eva Pereiro
- ALBA Synchrotron Light Source, MISTRAL Beamline-Experiments Division, 08290 Cerdanyola del Valles, Barcelona, Spain
| | | | - Xueting Jin
- Experimental Atherosclerosis Section, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda, Maryland 20892-1422, United States
| | - Howard S Kruth
- Experimental Atherosclerosis Section, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda, Maryland 20892-1422, United States
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10
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García-Arribas AB, Busto JV, Alonso A, Goñi FM. Atomic force microscopy characterization of palmitoylceramide and cholesterol effects on phospholipid bilayers: a topographic and nanomechanical study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:3135-3145. [PMID: 25693914 DOI: 10.1021/la504047n] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Supported planar bilayers (SPBs) on mica substrates have been studied at 23 °C under atomic force microscopy (AFM)-based surface topography and force spectroscopy with two main objectives: (i) to characterize palmitoylceramide (pCer)-induced gel (Lβ) domains in binary mixtures with either its sphingolipid relative palmitoylsphingomyelin (pSM) or the glycerophospholipid dipalmitoylphosphorylcholine (DPPC) and (ii) to evaluate effects of incorporating cholesterol (Chol) into the previous mixtures in terms of Cer and Chol cooperation for the generation of lamellar gel (Lβ) phases of ternary composition. Binary phospholipid/pCer mixtures at XpCer < 0.33 promote the generation of laterally segregated micron-sized pCer-rich domains. Their analysis at different phospholipid/pCer ratios, by means of domain thickness, roughness, and mechanical resistance to tip piercing, reveals unvarying AFM-derived features over increasing pCer concentrations. These results suggest that the domains grow in size with increasing pCer concentrations while keeping a constant phospholipid/pCer stoichiometry. Moreover, the data show important differences between pCer interactions with pSM or DPPC. Gel domains generated in pSM/pCer bilayers are thinner than the pSM-rich surrounding phase, while the opposite is observed in DPPC/pCer mixtures. Furthermore, a higher breakthrough force is observed for pSM/pCer as compared to DPPC/pCer domains, which can be associated with the preferential pCer interaction with its sphingolipid relative pSM. Cholesterol incorporation into both binary mixtures at a high Chol and pCer ratio abolishes any phospholipid/pCer binary domains. Bilayers with properties different from any of the pure or binary samples are observed instead. The data support no displacement of Chol by pCer or vice versa under these conditions, but rather a preferential interaction between the two hydrophobic lipids.
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Affiliation(s)
- Aritz B García-Arribas
- Unidad de Biofísica (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, P.O. Box 644, 48080 Bilbao, Spain
| | - Jon V Busto
- Unidad de Biofísica (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, P.O. Box 644, 48080 Bilbao, Spain
| | - Alicia Alonso
- Unidad de Biofísica (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, P.O. Box 644, 48080 Bilbao, Spain
| | - Félix M Goñi
- Unidad de Biofísica (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, P.O. Box 644, 48080 Bilbao, Spain
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11
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Dutagaci B, Becker-Baldus J, Faraldo-Gómez JD, Glaubitz C. Ceramide-lipid interactions studied by MD simulations and solid-state NMR. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:2511-9. [PMID: 24882733 DOI: 10.1016/j.bbamem.2014.05.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 05/20/2014] [Accepted: 05/21/2014] [Indexed: 01/08/2023]
Abstract
Ceramides play a key modulatory role in many cellular processes, which results from their effect on the structure and dynamics of biological membranes. In this study, we investigate the influence of C16-ceramide (C16) on the biophysical properties of DMPC lipid bilayers using solid-state NMR and atomistic molecular dynamics (MD) simulations. MD simulations and NMR measurements were carried out for a pure DMPC bilayer and for a 20% DMPC-C16 mixture. Calculated key structural properties, namely area per lipid, chain order parameters, and mass density profiles, indicate that C16 has an ordering effect on the DMPC bilayer. Furthermore, the simulations predict that specific hydrogen-bonds form between DMPC and C16 molecules. Multi-nuclear solid-state NMR was used to verify these theoretical predictions. Chain order parameters extracted from (13)C(1)H dipole couplings were measured for both lipid and ceramide and follow the trend suggested by the MD simulations. Furthermore, (1)H-MAS NMR experiments showed a direct contact between ceramide and lipids.
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Affiliation(s)
- Bercem Dutagaci
- Institute of Biophysical Chemistry, J.W. Goethe-University, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
| | - Johanna Becker-Baldus
- Institute of Biophysical Chemistry, J.W. Goethe-University, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
| | - José D Faraldo-Gómez
- Theoretical Molecular Biophysics Section, National Heart, Lung & Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Clemens Glaubitz
- Institute of Biophysical Chemistry, J.W. Goethe-University, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany.
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12
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Castro BM, Prieto M, Silva LC. Ceramide: a simple sphingolipid with unique biophysical properties. Prog Lipid Res 2014; 54:53-67. [PMID: 24513486 DOI: 10.1016/j.plipres.2014.01.004] [Citation(s) in RCA: 264] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 01/29/2014] [Accepted: 01/29/2014] [Indexed: 02/06/2023]
Abstract
Ceramides are involved in a variety of cellular processes and in disease. Their biological functions are thought to depend on ceramides' unique biophysical properties, which promote strong alterations of cell membrane properties and consequent triggering of signaling events. Over the last decades, efforts were made to understand the impact of ceramide on membrane biophysical features. Several studies, performed in a multitude of membrane models, address ceramides' specific interactions, the effect of their acyl chain structure and the influence of membrane lipid composition and properties on ceramide biophysical outcome. In this review, a rationale for the multiple and complex changes promoted by ceramide is provided, highlighting, on a comprehensive and critical manner, the interactions between ceramides and specific lipids and/or lipid phases. Focus is also given to the interplay between ceramide and cholesterol, particularly in lipid raft-mimicking mixtures, an issue of intense debate due to the urgent need to understand the biophysical impact of ceramide formation in models resembling the cell membrane. The implications of ceramide-induced biophysical changes on lipid-protein interactions and cell signaling are also discussed, together with the emerging evidence for the existence of ceramide-gel like domains in cellular membranes.
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Affiliation(s)
- Bruno M Castro
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, Complexo I, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Manuel Prieto
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, Complexo I, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Liana C Silva
- iMed.UL - Research Institute for Medicines and Pharmaceutical Sciences, Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
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13
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Ferreira NS, Goldschmidt-Arzi M, Sabanay H, Storch J, Levade T, Ribeiro MG, Addadi L, Futerman AH. Accumulation of ordered ceramide-cholesterol domains in farber disease fibroblasts. JIMD Rep 2013; 12:71-7. [PMID: 23846911 PMCID: PMC3897794 DOI: 10.1007/8904_2013_246] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 05/19/2013] [Accepted: 05/30/2013] [Indexed: 12/24/2022] Open
Abstract
Farber disease is an inherited metabolic disorder caused by mutations in the acid ceramidase gene, which leads to ceramide accumulation in lysosomes. Farber disease patients display a wide variety of symptoms with most patients eventually displaying signs of nervous system dysfunction. We now present a novel tool that could potentially be used to distinguish between the milder and more severe forms of the disease, namely, an antibody that recognizes a mixed monolayer or bilayer of cholesterol:C16-ceramide, but does not recognize either ceramide or cholesterol by themselves. This antibody has previously been used to detect cholesterol:C16-ceramide domains in a variety of cultured cells. We demonstrate that levels of cholesterol:C16-ceramide domains are significantly elevated in fibroblasts from types 4 and 7 Farber disease patients, and that levels of the domains can be modulated by either reducing ceramide or cholesterol levels. Moreover, these domains are located in membranes of the endomembrane system, and also in two unexpected locations, namely, the mitochondria and the plasma membrane. This study suggests that the ceramide that accumulates in severe forms of Farber disease cells is sequestered to distinct membrane subdomains, which may explain some of the cellular pathology observed in this devastating lysosomal storage disease.
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Affiliation(s)
- Natalia Santos Ferreira
- />National Health Institute Doutor Ricardo Jorge, Genetic Department, Centre for Medical Genetics Jacinto de Magalhães, Porto, Portugal
- />Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
- />Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, 76100 Israel
| | - Michal Goldschmidt-Arzi
- />Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, 76100 Israel
- />Department of Structural Biology, Weizmann Institute of Science, Rehovot, 76100 Israel
| | - Helena Sabanay
- />Department of Chemical Research Support, Weizmann Institute of Science, Rehovot, 76100 Israel
| | - Judith Storch
- />Department of Nutritional Sciences and Rutgers Center for Lipid Research, Rutgers University, Rutgers, NJ 08901 USA
| | - Thierry Levade
- />Equipe Labellisée Ligue Contre le Cancer 2013, Centre de Recherches en Cancérologie de Toulouse (CRCT), Université de Toulouse, Toulouse, France
- />Laboratoire de Biochimie Métabolique, Institut Fédératif de Biologie, CHU Purpan, Toulouse, France
| | - Maria Gil Ribeiro
- />National Health Institute Doutor Ricardo Jorge, Genetic Department, Centre for Medical Genetics Jacinto de Magalhães, Porto, Portugal
- />Faculty of Health Sciences, Fernando Pessoa University, Porto, Portugal
| | - Lia Addadi
- />Department of Structural Biology, Weizmann Institute of Science, Rehovot, 76100 Israel
| | - Anthony H. Futerman
- />Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, 76100 Israel
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14
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Ziblat R, Fargion I, Leiserowitz L, Addadi L. Spontaneous formation of two-dimensional and three-dimensional cholesterol crystals in single hydrated lipid bilayers. Biophys J 2012; 103:255-64. [PMID: 22853903 DOI: 10.1016/j.bpj.2012.05.025] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 04/24/2012] [Accepted: 05/16/2012] [Indexed: 01/23/2023] Open
Abstract
Grazing incidence x-ray diffraction measurements were performed on single hydrated bilayers and monolayers of Ceramide/Cholesterol/1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocyholine at varying concentrations. There are substantial differences in the phase and structure behavior of the crystalline domains formed within the bilayers relative to the corresponding monolayers, due to interactions between the opposing lipid leaflets. Depending on the lipid composition, these interactions lead to phase separation and formation of cholesterol crystals. The cholesterol and ceramide/cholesterol mixed phases were further characterized at 37°C by immunolabeling with specific antibodies recognizing ordered molecular arrays of cholesterol. Previous studies have shown that cholesterol may nucleate in artificial membranes to form thick two-dimensional bilayer crystals. The study herein demonstrates further growth of cholesterol into three-dimensional crystals. We believe that these results may provide further insight into the formation of cholesterol crystals in early stages of atherosclerosis inflammation.
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Affiliation(s)
- Roy Ziblat
- WYSS Institute for Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts, USA.
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Gangliosides and the multiscale modulation of membrane structure. Chem Phys Lipids 2011; 164:796-810. [DOI: 10.1016/j.chemphyslip.2011.09.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 09/12/2011] [Accepted: 09/13/2011] [Indexed: 02/07/2023]
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