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Sens A, Rischke S, Hahnefeld L, Dorochow E, Schäfer SMG, Thomas D, Köhm M, Geisslinger G, Behrens F, Gurke R. Pre-analytical sample handling standardization for reliable measurement of metabolites and lipids in LC-MS-based clinical research. J Mass Spectrom Adv Clin Lab 2023; 28:35-46. [PMID: 36872954 PMCID: PMC9975683 DOI: 10.1016/j.jmsacl.2023.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 02/09/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023] Open
Abstract
The emerging disciplines of lipidomics and metabolomics show great potential for the discovery of diagnostic biomarkers, but appropriate pre-analytical sample-handling procedures are critical because several analytes are prone to ex vivo distortions during sample collection. To test how the intermediate storage temperature and storage period of plasma samples from K3EDTA whole-blood collection tubes affect analyte concentrations, we assessed samples from non-fasting healthy volunteers (n = 9) for a broad spectrum of metabolites, including lipids and lipid mediators, using a well-established LC-MS-based platform. We used a fold change-based approach as a relative measure of analyte stability to evaluate 489 analytes, employing a combination of targeted LC-MS/MS and LC-HRMS screening. The concentrations of many analytes were found to be reliable, often justifying less strict sample handling; however, certain analytes were unstable, supporting the need for meticulous processing. We make four data-driven recommendations for sample-handling protocols with varying degrees of stringency, based on the maximum number of analytes and the feasibility of routine clinical implementation. These protocols also enable the simple evaluation of biomarker candidates based on their analyte-specific vulnerability to ex vivo distortions. In summary, pre-analytical sample handling has a major effect on the suitability of certain metabolites as biomarkers, including several lipids and lipid mediators. Our sample-handling recommendations will increase the reliability and quality of samples when such metabolites are necessary for routine clinical diagnosis.
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Key Words
- 1-AG, 1-arachidonoyl glycerol
- 1-LG, 1-linoleoyl glycerol
- 2-AG, 2-arachidonoyl glycerol
- 2-LG, 2- linoleoyl glycerol
- ACN, acetonitrile
- AEA, arachidonoyl ethanolamide
- BHT, 2,6-di-tert-butyl-4-methylphenol
- CAR, carnitine
- EC, endocannabinoid
- FC, fold change
- FT, freezing temperature/storage in ice water
- HETE, hydroxyeicosatetraenoate
- HRMS, high-resolution mass spectrometry
- IRB, Institutional Review Board
- IS, internal standard
- K3EDTA plasma sampling
- K3EDTA, tripotassium ethylenediaminetetraacetic acid
- LC, liquid chromatography
- LEA, linoleoyl ethanolamide
- LLE, liquid–liquid extraction
- LLOQ, lowest limit of quantification
- LPA, lysophosphatidic acid
- LPC O, lysophosphatidylcholine-ether
- LPC, lysophosphatidylcholine
- LPE, lysophosphatidylethanolamine
- LPG, lysophosphatidylglycerol
- LPI, lysophosphatic inositol
- Lipidomics
- MS/MS, tandem mass spectrometry
- MTBE, methyl tertiary-butyl ether
- MeOH, methanol
- Metabolomics
- OEA, oleoyl ethanolamide
- PBS, phosphate-buffered saline
- PC, phohsphatidylcholine
- PE, phosphotidylethanolamine
- PEA, palmitoyl ethanolamide
- PI, phosphatidylinositol
- Pre-analytics
- QC, quality control
- REC, Research Ethics Committee
- RT, room temperature
- Ref, reference sample
- SEA, stearoyl ethanolamide
- SPE, solid-phase extraction
- STD, calibration standard
- Sampling protocol
- VEA, vaccenic acid ethanolamid
- WB, whole blood
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Affiliation(s)
- A Sens
- Pharmazentrum Frankfurt/ZAFES, Institute of Clinical Pharmacology, Johann Wolfgang Goethe University, Theodor Stern-Kai 7, 60590 Frankfurt am Main, Germany
| | - S Rischke
- Pharmazentrum Frankfurt/ZAFES, Institute of Clinical Pharmacology, Johann Wolfgang Goethe University, Theodor Stern-Kai 7, 60590 Frankfurt am Main, Germany
| | - L Hahnefeld
- Pharmazentrum Frankfurt/ZAFES, Institute of Clinical Pharmacology, Johann Wolfgang Goethe University, Theodor Stern-Kai 7, 60590 Frankfurt am Main, Germany.,Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, and Fraunhofer Cluster of Excellence for Immune Mediated Diseases CIMD, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany
| | - E Dorochow
- Pharmazentrum Frankfurt/ZAFES, Institute of Clinical Pharmacology, Johann Wolfgang Goethe University, Theodor Stern-Kai 7, 60590 Frankfurt am Main, Germany
| | - S M G Schäfer
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, and Fraunhofer Cluster of Excellence for Immune Mediated Diseases CIMD, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany
| | - D Thomas
- Pharmazentrum Frankfurt/ZAFES, Institute of Clinical Pharmacology, Johann Wolfgang Goethe University, Theodor Stern-Kai 7, 60590 Frankfurt am Main, Germany.,Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, and Fraunhofer Cluster of Excellence for Immune Mediated Diseases CIMD, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany
| | - M Köhm
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, and Fraunhofer Cluster of Excellence for Immune Mediated Diseases CIMD, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany.,Rheumatology, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany
| | - G Geisslinger
- Pharmazentrum Frankfurt/ZAFES, Institute of Clinical Pharmacology, Johann Wolfgang Goethe University, Theodor Stern-Kai 7, 60590 Frankfurt am Main, Germany.,Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, and Fraunhofer Cluster of Excellence for Immune Mediated Diseases CIMD, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany
| | - F Behrens
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, and Fraunhofer Cluster of Excellence for Immune Mediated Diseases CIMD, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany.,Rheumatology, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany
| | - R Gurke
- Pharmazentrum Frankfurt/ZAFES, Institute of Clinical Pharmacology, Johann Wolfgang Goethe University, Theodor Stern-Kai 7, 60590 Frankfurt am Main, Germany.,Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, and Fraunhofer Cluster of Excellence for Immune Mediated Diseases CIMD, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany
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Shidoji Y, Iwao C. A rapid increase in lysophospholipids after geranylgeranoic acid treatment in human hepatoma-derived HuH-7 cells revealed by metabolomics analysis. Biochem Biophys Rep 2021; 28:101176. [PMID: 34869922 PMCID: PMC8626837 DOI: 10.1016/j.bbrep.2021.101176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 11/18/2021] [Accepted: 11/18/2021] [Indexed: 11/18/2022] Open
Abstract
Geranylgeranoic acid (GGA) was developed as a preventative agent against second primary hepatoma, and was reported to induce cell death in human hepatoma cells via Toll-like receptor 4 (TLR4)-mediated pyroptosis. We recently reported that GGA is enzymatically biosynthesized from mevalonic acid in human hepatoma-derived HuH-7 cells and that endogenous GGA is found in most rat organs including the liver. An unbiased metabolomics analysis of ice-cold 50% acetonitrile extracts from control and GGA-treated cells was performed in this study to characterize the intracellular metabolic changes in GGA-induced pyroptosis and to analyze their relationship with the mechanism of GGA-induced cell death. The total positive ion chromatograms of the cellular extracts in ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry were apparently unchanged after GGA treatment, but an orthogonal partial least squares-discriminant analysis score plot clearly discriminated the intracellular metabolite profiles of GGA-treated cells from that of control cells. S-plot analysis revealed 15 potential biomarkers up-regulated by 24-h GGA treatment according to their variable importance in the projection value of more than 1, and the subsequent metabolomics analysis identified nine of these metabolites as a group of lysophospholipids containing lysophosphatidylcholine with C16:0, C20:4, or C20:3 fatty acids. The possible roles of these lysophospholipids in GGA-induced pyroptosis are discussed. Metabolomics analysis was performed on geranylgeranoic acid (GGA)-treated cells. Total positive ion chromatograms were apparently similar after GGA treatment. The OPLS-DA score plot distinguished the GGA-treated cells from control cells. The S-plot analysis revealed GGA-induced upregulation of lysophospholipids. The possible roles of lysophospholipids in GGA-induced pyroptosis are discussed.
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Key Words
- ATRA, all-trans retinoic acid
- Cell death
- D-MEM, Dulbecco’s modified Eagle’s medium
- ENPP2, ectonucleotide pyrophosphatase/phosphodiesterase 2
- FBS, fetal bovine serum
- GGA, geranylgeranoic acid
- GSDMD, gasdermin D
- Geranylgeranoic acid
- HMDB, Human Metabolome Database
- Hepatoma
- KEGG, Kyoto Encyclopedia of Genes and Genomes
- LCAT, lecithin cholesterol acyltransferase
- LIPC, lipase C
- LPA, lysophosphatidic acid
- LPC, lysophosphatidylcholine
- LPCAT, LPC acyltransferase
- LPE, lysophosphatidylethanolamine
- LPL, lysophospholipid
- Lysophospholipids
- Metabolomics
- OPLS-DA, orthogonal partial least squares-discriminant analysis
- PCA, principal component analysis
- PLA2, phospholipase A2
- Q-Tof/MS, quadrupole time-of-flight type mass spectrometry
- SPH, second primary hepatoma
- TLR4, toll-like receptor-4
- UPLC, ultra-performance liquid chromatography
- UPRER, unfolded protein response or endoplasmic reticulum stress response
- VIP, variable importance in the projection
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Rebolledo DL, Lipson KE, Brandan E. Driving fibrosis in neuromuscular diseases: Role and regulation of Connective tissue growth factor (CCN2/CTGF). Matrix Biol Plus 2021; 11:100059. [PMID: 34435178 PMCID: PMC8377001 DOI: 10.1016/j.mbplus.2021.100059] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 02/07/2023] Open
Abstract
Connective tissue growth factor or cellular communication network 2 (CCN2/CTGF) is a matricellular protein member of the CCN family involved in several crucial biological processes. In skeletal muscle, CCN2/CTGF abundance is elevated in human muscle biopsies and/or animal models for diverse neuromuscular pathologies, including muscular dystrophies, neurodegenerative disorders, muscle denervation, and muscle overuse. In this context, CCN2/CTGF is deeply involved in extracellular matrix (ECM) modulation, acting as a strong pro-fibrotic factor that promotes excessive ECM accumulation. Reducing CCN2/CTGF levels or biological activity in pathological conditions can decrease fibrosis, improve muscle architecture and function. In this work, we summarize information about the role of CCN2/CTGF in fibrosis associated with neuromuscular pathologies and the mechanisms and signaling pathways that regulate their expression in skeletal muscle.
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Affiliation(s)
- Daniela L Rebolledo
- Centro de Envejecimiento y Regeneración, CARE Chile UC, Chile.,Centro de Excelencia en Biomedicina de Magallanes (CEBIMA), Punta Arenas, Chile
| | | | - Enrique Brandan
- Centro de Envejecimiento y Regeneración, CARE Chile UC, Chile.,Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Chile.,Fundación Ciencia y Vida, Santiago, Chile
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Yamada H, Hoshino F, Lu Q, Sakane F. Cellular phosphatidic acid sensor, α-synuclein N-terminal domain, detects endogenous phosphatidic acid in macrophagic phagosomes and neuronal growth cones. Biochem Biophys Rep 2020; 22:100769. [PMID: 32490215 DOI: 10.1016/j.bbrep.2020.100769] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 05/05/2020] [Indexed: 11/22/2022] Open
Abstract
Phosphatidic acid (PA) is the simplest phospholipid and is involved in the regulation of various cellular events. Recently, we developed a new PA sensor, the N-terminal region of α-synuclein (α-Syn-N). However, whether α-Syn-N can sense physiologically produced, endogenous PA remains unclear. We first established an inactive PA sensor (α-Syn-N-KQ) as a negative control by replacing all eleven lysine residues with glutamine residues. Using confocal microscopy, we next verified that α-Syn-N, but not α-Syn-N-KQ, detected PA in macrophagic phagosomes in which PA is known to be enriched, further indicating that α-Syn-N can be used as a reliable PA sensor in cells. Finally, because PA generated during neuronal differentiation is critical for neurite outgrowth, we investigated the subcellular distribution of PA using α-Syn-N. We found that α-Syn-N, but not α-Syn-N-KQ, accumulated at the peripheral regions (close to the plasma membrane) of neuronal growth cones. Experiments using a phospholipase D (PLD) inhibitor strongly suggested that PA in the peripheral regions of the growth cone was primarily produced by PLD. Our findings provide a reliable sensor of endogenous PA and novel insights into the distribution of PA during neuronal differentiation.
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Key Words
- DGK, diacylglycerol kinase
- DMEM, Dulbecco's modified Eagle's medium
- Diacylglycerol kinase
- F-actin, filamentous actin
- FIPI, 5-fluoro-2-indolyl deschlorohalopemide
- Growth cone
- LPA, lysophosphatidic acid
- LPAAT, LPA acyltransferase
- Lipid sensor
- Myr, myristoylated
- PA, phosphatidic acid
- PABD, phosphatidic acid-binding domain
- PC, phosphatidylcholine
- PLD, phospholipase D
- Phagosome
- Phosphatidic acid
- Phospholipase D
- α-Syn, α-synuclein
- α-Syn-N, N-terminal region of α-Syn
- α-Synuclein
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Komenoi S, Suzuki Y, Asami M, Murakami C, Hoshino F, Chiba S, Takahashi D, Kado S, Sakane F. Microarray analysis of gene expression in the diacylglycerol kinase η knockout mouse brain. Biochem Biophys Rep 2019; 19:100660. [PMID: 31297456 PMCID: PMC6597918 DOI: 10.1016/j.bbrep.2019.100660] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 06/17/2019] [Accepted: 06/19/2019] [Indexed: 12/18/2022] Open
Abstract
We have revealed that diacylglycerol kinase η (DGKη)-knockout (KO) mice display bipolar disorder (BPD) remedy-sensitive mania-like behaviors. However, the molecular mechanisms causing the mania-like abnormal behaviors remain unclear. In the present study, microarray analysis was performed to determine global changes in gene expression in the DGKη-KO mouse brain. We found that the DGKη-KO brain had 43 differentially expressed genes and the following five affected biological pathways: "neuroactive ligand-receptor interaction", "transcription by RNA polymerase II", "cytosolic calcium ion concentration", "Jak-STAT signaling pathway" and "ERK1/2 cascade". Interestingly, mRNA levels of prolactin and growth hormone, which are augmented in BPD patients and model animals, were most strongly increased. Notably, all five biological pathways include at least one gene among prolactin, growth hormone, forkhead box P3, glucagon-like peptide 1 receptor and interleukin 1β, which were previously implicated in BPD. Consistent with the microarray data, phosphorylated ERK1/2 levels were decreased in the DGKη-KO brain. Microarray analysis showed that the expression levels of several glycerolipid metabolism-related genes were also changed. Liquid chromatography-mass spectrometry revealed that several polyunsaturated fatty acid (PUFA)-containing phosphatidic acid (PA) molecular species were significantly decreased as a result of DGKη deficiency, suggesting that the decrease affects PUFA metabolism. Intriguingly, the PUFA-containing lysoPA species were markedly decreased in DGKη-KO mouse blood. Taken together, our study provides not only key broad knowledge to gain novel insights into the underlying mechanisms for the mania-like behaviors but also information for developing BPD diagnostics.
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Key Words
- BPD, bipolar disorder
- Bipolar disorder
- DAVID, Database for AnnotationVisualization and Integrated Discovery
- DG, diacylglycerol
- DGK, diacylglycerol kinase
- Diacylglycerol kinase
- ERK, extracellular signal-regulated kinase
- Fpr2, N-formyl peptide receptor 2
- GO:BP, Gene Ontology: Biological Process
- GWAS, genome-wide association study
- Gh, growth hormone
- Glp1r, glucagon-like peptide 1 receptor
- Growth hormone
- Il1b, interleukin 1β
- KEGG, Kyoto Encyclopedia of Genes and Genomes
- KO, knockout
- LC-MS, liquid chromatography-mass spectrometry
- LPA, lysophosphatidic acid
- Lysophosphatidic acid
- MEK, mitogen-activated protein kinase/ERK kinase
- PA, phosphatidic acid
- PI, phosphatidylinositol
- PUFA, polyunsaturated fatty acid
- Phosphatidic acid
- Prl, prolactin
- Prolactin
- SERT, serotonin transporter
- WT, wild type
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Affiliation(s)
- Suguru Komenoi
- Department of Chemistry, Graduate School of Science, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Yuji Suzuki
- Department of Chemistry, Graduate School of Science, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Maho Asami
- Department of Chemistry, Graduate School of Science, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Chiaki Murakami
- Department of Chemistry, Graduate School of Science, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Fumi Hoshino
- Department of Chemistry, Graduate School of Science, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Sohei Chiba
- Department of Chemistry, Graduate School of Science, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Daisuke Takahashi
- Department of Chemistry, Graduate School of Science, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Sayaka Kado
- Center for Analytical Instrumentation, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Fumio Sakane
- Department of Chemistry, Graduate School of Science, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
- Corresponding author. Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
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Abstract
Every year, enteric infections and associated diarrhea kill millions of people. The situation is compounded by increases in the number of enteric pathogens that are acquiring resistance to antibiotics, as well as (hitherto) a relative paucity of information on host molecular targets that may contribute to diarrhea. Many forms of diarrheal disease depend on the dysregulation of intestinal ion transporters, and an associated imbalance between secretory and absorptive functions of the intestinal epithelium. A number of major transporters have been implicated in the pathogenesis of diarrheal diseases and thus an understanding of their expression, localization, and regulation after infection with various bacteria, viruses, and protozoa likely will prove critical in designing new therapies. This article surveys our understanding of transporters that are modulated by specific pathogens and the mechanism(s) involved, thereby illuminating targets that might be exploited for new therapeutic approaches.
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Key Words
- ATP, adenosine triphosphate
- ATPase, adenosine triphosphatase
- CDI, Clostridium difficile infection
- CFTR, cystic fibrosis transmembrane conductance regulator
- CLCA1, chloride channel accessory 1
- CT, cholera toxin
- CXCR2, C-X-C motif chemokine receptor 2
- DRA, down-regulated in adenoma
- Diarrhea
- ENaC, epithelial sodium channel
- EPEC, enteropathogenic Escherichia coli
- ETEC, enterotoxigenic Escherichia coli
- Enteric Pathogen
- Epithelium
- EspG, Escherichia coli secreted protein G
- GPR39, G-protein coupled receptor 39
- Ion Transport
- KCC, potassium-chloride cotransporter
- LPA, lysophosphatidic acid
- LT, heat-labile toxin
- NHE, sodium/hydrogen exchanger
- NHERF2, sodium/hydrogen exchanger regulatory factor 2
- NKCC, sodium-potassium-2 chloride cotransporter
- ORT, oral rehydration therapy
- PKC, protein kinase C
- SGLT1, sodium-glucose cotransporter 1
- SLC, solute carrier
- ST, heat-stabile toxin
- TNF, tumor necrosis factor
- Tcd, Clostridium difficile toxin
- ZnR, zinc sensing receptor
- cAMP, adenosine 3′,5′-cyclic monophosphate
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Affiliation(s)
- Soumita Das
- Department of Pathology, University of California San Diego School of Medicine, La Jolla, California
| | - Rashini Jayaratne
- Department of Medicine, University of California San Diego School of Medicine, La Jolla, California
| | - Kim E. Barrett
- Department of Medicine, University of California San Diego School of Medicine, La Jolla, California,Correspondence Address correspondence to: Kim E. Barrett, Department of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0063. fax: (858) 246-1788.
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Chang W, Antoku S, Östlund C, Worman HJ, Gundersen GG. Linker of nucleoskeleton and cytoskeleton (LINC) complex-mediated actin-dependent nuclear positioning orients centrosomes in migrating myoblasts. Nucleus 2015; 6:77-88. [PMID: 25587885 DOI: 10.1080/19491034.2015.1004947] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Myoblast migration is essential for muscle development and repair; however, the factors that contribute to the polarity of migrating myoblasts are relatively unknown. We find that randomly migrating C2C12 myoblasts orient their centrosomes in the direction of migration. Using wounded monolayers, we further show that centrosome orientation is stimulated by the serum factor lysophosphatidic acid (LPA) and involves the rearward movement of the nucleus while the centrosome is maintained at the cell centroid. The rate of nuclear movement correlated with that of actin retrograde flow and both cytochalasin D and blebbistatin prevented nuclear movement and centrosome orientation. Actin-dependent rearward nuclear movement in fibroblasts is mediated by assembly of nuclear membrane nesprin-2G and SUN2 LINC complexes into transmembrane actin-associated nuclear (TAN) lines anchored by A-type lamins and emerin. In C2C12 myoblasts, depletion of nesprin-2G, SUN2 or lamin A/C prevented nuclear movement and endogenous nesprin-2G and a chimeric GFP-mini-nesprin-2G formed TAN lines during nuclear movement. Depleting nesprin-2G strongly interfered with directed cell migration and reduced the efficiency of myoblast fusion into multinucleated myotubes. Our results show that nuclear movement contributes to centrosome orientation and polarity for efficient migration and fusion of myoblasts. Given that mutations in the genes encoding A-type lamins, nesprin-2 and SUN2 cause Emery-Dreifuss muscular dystrophy and related myopathies, our results have implications for understanding the mechanism of disease pathogenesis.
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Affiliation(s)
- Wakam Chang
- a Department of Pathology and Cell Biology ; College of Physicians and Surgeons; Columbia University ; New York , NY USA
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Antoku S, Zhu R, Kutscheidt S, Fackler OT, Gundersen GG. Reinforcing the LINC complex connection to actin filaments: the role of FHOD1 in TAN line formation and nuclear movement. Cell Cycle 2015; 14:2200-5. [PMID: 26083340 DOI: 10.1080/15384101.2015.1053665] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Positioning the nucleus is critical for many cellular processes including cell division, migration and differentiation. The linker of nucleoskeleton and cytoskeleton (LINC) complex spans the inner and outer nuclear membranes and has emerged as a major factor in connecting the nucleus to the cytoskeleton for movement and positioning. Recently, we discovered that the diaphanous formin family member FHOD1 interacts with the LINC complex component nesprin-2 giant (nesprin-2G) and that this interaction plays essential roles in the formation of transmembrane actin-dependent nuclear (TAN) lines and nuclear movement during cell polarization in fibroblasts. We found that FHOD1 strengthens the connection between nesprin-2G and rearward moving dorsal actin cables by providing a second site of interaction between nesprin-2G and the actin cable. These results indicate that the LINC complex connection to the actin cytoskeleton can be enhanced by cytoplasmic factors and suggest a new model for TAN line formation. We discuss how the nesprin-2G-FHOD1 interaction may be regulated and its possible functional significance for development and disease.
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Key Words
- ABS, actin binding site
- ANC-1, Syne homology
- CH, calponin homology
- DAD, diaphanous autoregulatory domain
- DID, diaphanous inhibitory domain
- DRF, diaphanous related formin
- EDMD, Emery-Dreifuss muscular dystrophy
- Emery-Dreifuss muscular dystrophy
- FH, formin homology
- FHOD1
- GBD, GTPase binding domain
- GFP-mN2G, GFP-mini-nesprin-2G
- KASH, Klarsicht
- LINC Complex
- LINC, linker of nucleoskeleton and cytoskeleton
- LPA, lysophosphatidic acid
- SR, spectrin repeat
- TAN lines
- TAN lines, transmembrane actin-dependent nuclear lines
- actin filaments
- formin
- nesprin
- nesprin-2G, nesprin-2 giant
- nuclear movement
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Affiliation(s)
- Susumu Antoku
- a Department of Pathology & Cell Biology ; Columbia University ; New York , NY USA
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Abstract
High endothelial venules (HEVs) are blood vessels especially adapted for lymphocyte trafficking which are normally found in secondary lymphoid organs such as lymph nodes (LN) and Peyer's patches. It has long been known that HEVs develop in non-lymphoid organs during chronic inflammation driven by autoimmunity, infection or allografts. More recently, HEVs have been observed in solid, vascularized tumors and their presence correlated with reduced tumor size and improved patient outcome. It is proposed that newly formed HEV promote antitumor immunity by recruiting naive lymphocytes into the tumor, thus allowing the local generation of cancerous tissue-destroying lymphocytes. Understanding how HEVs develop and function are therefore important to unravel their role in human cancers. In LN, HEVs develop during embryonic and early post-natal life and are actively maintained by the LN microenvironment. Systemic blockade of lymphotoxin-β receptor leads to HEV de-differentiation, but the LN components that induce HEV differentiation have remained elusive. Recent elegant studies using gene-targeted mice have demonstrated clearly that triggering the lymphotoxin-β receptor in endothelial cells (EC) induces the differentiation of HEV and that CD11c+ dendritic cells play a crucial role in this process. It will be important to determine whether lymphotoxin-β receptor-dependent signaling in EC drives the development of HEV during tumorigenesis and which cells have HEV-inducer properties. This may reveal therapeutic approaches to promote HEV neogenesis and determine the impact of newly formed HEV on tumor immunity.
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Key Words
- EC, endothelial cells
- FRC, fibroblast reticular cells
- HEC, high endothelial cells
- HEV, high endothelial venules
- LN, lymph nodes
- LPA, lysophosphatidic acid
- LT, lymphotoxin
- LT-βR, lymphotoxin-β receptor
- MAdCAM, mucosal cell adhesion molecule
- PNAd, peripheral node addressin
- SIP, sphingosine-1-phosphate
- T cell homing
- TLO, tertiary lymphoid organ
- VE-cadherin, vascular endothelial cadherin
- VEGF, vascular endothelial growth factor
- dendritic cells
- high endothelial venules
- lymphotoxin-β receptor
- tumor immunotherapy
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Affiliation(s)
- Ann Ager
- Infection and Immunity; School of Medicine; Cardiff University ; Cardiff, UK
| | - Michael J May
- School of Veterinary Medicine; University of Pennsylvania ; Philadelphia, PA, USA
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Tsutsumi T, Yamakawa S, Ishihara A, Yamamoto A, Tanaka T, Tokumura A. Reduced kidney levels of lysophosphatidic acids in rats after chronic administration of aristolochic acid: Its possible protective role in renal fibrosis. Toxicol Rep 2015; 2:121-129. [PMID: 28962344 PMCID: PMC5598376 DOI: 10.1016/j.toxrep.2015.02.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 01/30/2015] [Accepted: 02/23/2015] [Indexed: 11/30/2022] Open
Abstract
Aristolochic acid (AA) is considered to be a causative agent for progressive interstitial renal fibrosis, leading to AA nephropathy. Lysophosphatidic acid (LPA) is a mediator in the onset of renal fibrosis. In this study, we analyzed the molecular species of LPA and its precursor lysophospholipids in kidney tissue from rats exposed to AA. Daily intraperitoneal injections of AA for 35 days to rats gave rise to fibrosis in kidney, decreased the kidney levels of LPA, lysophosphatidylserine and lysophosphatidylinositol. In rat renal cell lines (NRK52E and NRK49F), AA-induced cytotoxicity was potentiated by Ki16425, LPA1,3 receptor antagonist. The level of mRNA encording α-smooth muscle actin was significantly increased by AA-treatment only in NRK52E cells, while the mRNA level of collagen III was decreased in both NRK52E and NRK49F cells. These results suggest that endogenous LPA in rat kidney prevents AA-induced renal fibrosis.
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Key Words
- 18S, ribosomal protein S18
- AA, aristolochic acid
- AZ, azan Mallory
- Aristolochic acid
- Chronic kidney disease
- Fibrosis
- GAPDH, glyceraldehyde 3-phosphate dehydrogenase
- HE, hematoxylin/eosin
- LC–MS/MS, liquid chromatography–tandem mass spectrometry
- LPA, lysophosphatidic acid
- LPC, lysophosphatidylcholine
- LPE, lysophosphatidylethanolamine
- LPG, lysophosphatidylglycerol
- LPI, lysophosphatidylinositol
- LPL, lysophospholipid
- LPS, lysophosphatidylserine
- Lysophosphatidic acid
- Lysophospholipid
- Nephrotoxicity
- PLA1, phospholipase A1
- PLA2, phospholipase A2
- lysoPLD, lysophospholipase D
- α-SMA, α-smooth muscle actin
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Affiliation(s)
- Toshihiko Tsutsumi
- Department of Pharmaceutical Sciences, Kyushu University of Health and Welfare, Japan
| | - Syougo Yamakawa
- Department of Pharmaceutical Health Chemistry, Institute of Health Biosciences, University of Tokushima Graduate School, Japan
| | - Akira Ishihara
- Department of Anatomic Pathology, Prefectural Nobeoka Hospital, Japan
| | - Aimi Yamamoto
- Department of Pharmaceutical Health Chemistry, Institute of Health Biosciences, University of Tokushima Graduate School, Japan
| | - Tamotsu Tanaka
- Department of Pharmaceutical Health Chemistry, Institute of Health Biosciences, University of Tokushima Graduate School, Japan
| | - Akira Tokumura
- Department of Pharmaceutical Health Chemistry, Institute of Health Biosciences, University of Tokushima Graduate School, Japan.,Department of Life Sciences, Faculty of Pharmacy, Yasuda Women's University, Japan
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Abstract
Cell migration is a highly regulated multistep process that requires the coordinated regulation of cell adhesion, protrusion, and contraction. These processes require numerous protein–protein interactions and the activation of specific signaling pathways. The Rho family of GTPases plays a key role in virtually every aspect of the cell migration cycle. The activation of Rho GTPases is mediated by a large and diverse family of proteins; the guanine nucleotide exchange factors (RhoGEFs). GEFs work immediately upstream of Rho proteins to provide a direct link between Rho activation and cell–surface receptors for various cytokines, growth factors, adhesion molecules, and G protein-coupled receptors. The regulated targeting and activation of RhoGEFs is essential to coordinate the migratory process. In this review, we summarize the recent advances in our understanding of the role of RhoGEFs in the regulation of cell migration.
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Key Words
- DH, Dbl-homology
- DHR, DOCK homology region
- DOCK, dedicator of cytokinesis
- ECM, extracellular matrix
- EGF, epidermal growth factor
- FA, focal adhesion
- FN, fibronectin
- GAP, GTPase activating protein
- GDI, guanine nucleotide dissociation inhibitor
- GEF, guanine nucleotide exchange factor
- GPCR, G protein-coupled receptor
- HGF, hepatocyte growth factor
- LPA, lysophosphatidic acid
- MII, myosin II
- PA, phosphatidic acid
- PDGF, platelet-derived growth factor
- PH, pleckstrin-homology
- PIP2, phosphatidylinositol 4, 5-bisphosphate
- PIP3, phosphatidylinositol (3, 4, 5)-trisphosphate.
- Rho GEFs
- Rho GTPases
- bFGF, basic fibroblast growth factor
- cell migration
- cell polarization
- focal adhesions
- guanine nucleotide exchange factors
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Affiliation(s)
- Silvia M Goicoechea
- a Department of Biological Sciences ; University of Toledo ; Toledo , OH USA
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Tsukahara R, Haniu H, Matsuda Y, Tsukahara T. Heart-type fatty-acid-binding protein (FABP3) is a lysophosphatidic acid-binding protein in human coronary artery endothelial cells. FEBS Open Bio 2014; 4:947-51. [PMID: 25426414 PMCID: PMC4239478 DOI: 10.1016/j.fob.2014.10.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 10/26/2014] [Accepted: 10/28/2014] [Indexed: 11/25/2022] Open
Abstract
Fatty-acid-binding protein 3, muscle and heart (FABP3), also known as heart-type FABP, is a member of the family of intracellular lipid-binding proteins. It is a small cytoplasmic protein with a molecular mass of about 15 kDa. FABPs are known to be carrier proteins for transporting fatty acids and other lipophilic substances from the cytoplasm to the nucleus, where these lipids are released to a group of nuclear receptors such as peroxisome proliferator-activated receptors (PPARs). In this study, using lysophosphatidic acid (LPA)-coated agarose beads, we have identified FABP3 as an LPA carrier protein in human coronary artery endothelial cells (HCAECs). Administration of LPA to HCAECs resulted in a dose-dependent increase in PPARγ activation. Furthermore, the LPA-induced PPARγ activation was abolished when the FABP3 expression was reduced using small interfering RNA (siRNA). We further show that the nuclear fraction of control HCAECs contained a significant amount of exogenously added LPA, whereas FABP3 siRNA-transfected HCAECs had a decreased level of LPA in the nucleus. Taken together, these results suggest that FABP3 governs the transcriptional activities of LPA by targeting them to cognate PPARγ in the nucleus.
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Affiliation(s)
- Ryoko Tsukahara
- Endowed Research Division of Human Welfare Sciences, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo 112-8610, Japan ; Science and Education Center, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo 112-861, Japan
| | - Hisao Haniu
- Institute for Biomedical Sciences, Shinshu University Interdisciplinary Cluster for Cutting Edge Research, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan
| | - Yoshikazu Matsuda
- Clinical Pharmacology Educational Center, Nihon Pharmaceutical University, Ina-machi, Saitama 362-0806, Japan
| | - Tamotsu Tsukahara
- Department of Hematology and Immunology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa 920-0293, Japan
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Wuhanqimuge, Itakura A, Matsuki Y, Tanaka M, Arioka M. Lysophosphatidylcholine enhances NGF-induced MAPK and Akt signals through the extracellular domain of TrkA in PC12 cells. FEBS Open Bio 2013; 3:243-51. [PMID: 23772401 PMCID: PMC3678299 DOI: 10.1016/j.fob.2013.05.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 05/16/2013] [Accepted: 05/22/2013] [Indexed: 12/20/2022] Open
Abstract
Lysophosphatidylcholine (LPC) is one of the major lysophospholipids mainly generated by phospholipase A2 (PLA2)-mediated hydrolysis of phosphatidylcholine (PC). We previously found that LPC displays neurotrophin-like activity in the rat pheochromocytoma PC12 cells and in cerebellar granule neurons, but the molecular mechanism remains unclear. We report here that LPC specifically enhances nerve growth factor (NGF)-induced signals in PC12 cells. When PC12 cells were treated with NGF, MAPK was phosphorylated, but this phosphorylation was significantly elevated when LPC was added together. In accordance, NGF-induced expression of immediate early genes, c-fos and NGF-IA, was upregulated by LPC. Phosphorylation of the upstream components, MEK and NGF receptor TrkA, was also promoted by LPC, which was in line with increased phosphorylation of Akt. In contrast, LPC did not enhance epidermal growth factor (EGF)-, basic fibroblast growth factor-, or insulin-like growth factor-1-induced signals. Studies using TrkA/EGF receptor chimeras demonstrated that the extracellular domain, but not the transmembrane or intracellular domains, of TrkA is responsible for the effect of LPC. Exogenously-added secretory PLA2 (sPLA2) enhanced NGF-induced MAPK phosphorylation at a comparable level to LPC, suggesting that LPC generated in situ by sPLA2-mediated hydrolysis of membrane PC stimulated NGF-TrkA signal. Taken together, these results indicate a specific role and function of LPC on NGF-TrkA signaling pathway. LPC potentiates NGF-induced MAPK and Akt phosphorylation in PC12 cells. LPC enhances NGF-induced MEK and TrkA phosphorylation. LPC does not affect the signals of EGF, FGF, and IGF-1. The effect of LPC requires the extracellular domain of TrkA. sPLA2 also potentiates NGF-induced MAPK phosphorylation.
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Key Words
- Akt
- BDNF, brain-derived neurotrophic factor
- CGNs, cerebellar granule neurons
- DMEM, Dulbecco’s modified Eagle’s medium
- EGF, epidermal growth factor
- EGFP, enhanced green fluorescent protein
- EGFR, EGF receptor
- GPCR, G protein-coupled receptors
- IGF-1, insulin-like growth factor-1
- LPA, lysophosphatidic acid
- LPC, lysophosphatidylcholine
- LPE, lysophosphatidylethanolamine
- LPS, lysophosphatidylserine
- Lysophosphatidylcholine
- MAPK, mitogen-activated protein kinase
- MEK, mitogen-activated protein kinase kinase
- Mitogen-activated protein kinase (MAPK)
- NGF, nerve growth factor
- Nerve growth factor
- PC, phosphatidylcholine
- PI3K, phosphatidylinositol 3-kinase
- PLA2, phospholipase A2
- RT-PCR, reverse transcription-polymerase chain reaction
- SDS, sodium dodecyl sulfate
- TTBS, Tris-buffered saline containing 0.01% Tween 20
- TrkA
- bFGF, basic fibroblast growth factor
- sPLA2, secretory PLA2
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Affiliation(s)
- Wuhanqimuge
- Department of Biotechnology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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Abstract
Skin functions as a window to our overall health and a number of systemic diseases result in various cutaneous changes. Knowledge of these manifestations helps in suspecting an underlying systemic illness. Cutaneous abnormalities are quite common in patients with liver diseases and this article aims to focus on these dermatoses. Cutaneous manifestations seen in patients with liver disease though common are nonspecific. They can also be seen in patients without liver diseases and generally do not indicate about a specific underlying hepatic disorder. The presence of a constellation of signs and symptoms is more useful in pointing toward an underlying hepatobiliary condition. The commonest symptom in patients with liver disease is pruritus which is often protracted and disabling. Other common features include spider angiomas, palmar erythema, paper money skin, xanthelasmas, pigmentary changes, and nutritional deficiencies. In this article, first the common cutaneous manifestations that may be associated with liver disorders are discussed and then common liver diseases with their specific cutaneous findings are discussed. Cutaneous abnormalities may be the first clue to the underlying liver disease. Identifying them is crucial for early diagnosis and better management.
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Affiliation(s)
- Sunil Dogra
- Address for correspondence: Sunil Dogra, Associate Professor, Department of Dermatology, Venereology and Leprology, Postgraduate Institute of Medical Education and Research, Chandigarh - 160012, India
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