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La Monica S, Vacondio F, Eltayeb K, Lodola A, Volta F, Viglioli M, Ferlenghi F, Galvani F, Galetti M, Bonelli M, Fumarola C, Cavazzoni A, Flammini L, Verzè M, Minari R, Petronini PG, Tiseo M, Mor M, Alfieri R. Targeting glucosylceramide synthase induces antiproliferative and proapoptotic effects in osimertinib-resistant NSCLC cell models. Sci Rep 2024; 14:6491. [PMID: 38499619 PMCID: PMC10948837 DOI: 10.1038/s41598-024-57028-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 03/12/2024] [Indexed: 03/20/2024] Open
Abstract
The EGFR tyrosine kinase inhibitor osimertinib has been approved for the first-line treatment of EGFR-mutated Non-Small Cell Lung Cancer (NSCLC) patients. Despite its efficacy, patients develop resistance. Mechanisms of resistance are heterogeneous and not fully understood, and their characterization is essential to find new strategies to overcome resistance. Ceramides are well-known regulators of apoptosis and are converted into glucosylceramides (GlcCer) by glucosylceramide synthase (GCS). A higher content of GlcCers was observed in lung pleural effusions from NSCLC patients and their role in osimertinib-resistance has not been documented. The aim of this study was to determine the therapeutic potential of inhibiting GCS in NSCLC EGFR-mutant models resistant to osimertinib in vitro and in vivo. Lipidomic analysis showed a significant increase in the intracellular levels of glycosylceramides, including GlcCers in osimertinib resistant clones compared to sensitive cells. In resistant cells, the GCS inhibitor PDMP caused cell cycle arrest, inhibition of 2D and 3D cell proliferation, colony formation and migration capability, and apoptosis induction. The intratumoral injection of PDMP completely suppressed the growth of OR xenograft models. This study demonstrated that dysregulation of ceramide metabolism is involved in osimertinib-resistance and targeting GCS may be a promising therapeutic strategy for patients progressed to osimertinib.
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Affiliation(s)
- Silvia La Monica
- Department of Medicine and Surgery, University of Parma, 43126, Parma, Italy
| | - Federica Vacondio
- Department of Food and Drug, University of Parma, 43124, Parma, Italy
| | - Kamal Eltayeb
- Department of Medicine and Surgery, University of Parma, 43126, Parma, Italy
| | - Alessio Lodola
- Department of Food and Drug, University of Parma, 43124, Parma, Italy
| | - Francesco Volta
- Department of Medicine and Surgery, University of Parma, 43126, Parma, Italy
| | - Martina Viglioli
- Department of Food and Drug, University of Parma, 43124, Parma, Italy
| | | | - Francesca Galvani
- Department of Food and Drug, University of Parma, 43124, Parma, Italy
| | - Maricla Galetti
- Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, INAIL-Italian Workers' Compensation Authority, 00078, Monte Porzio Catone, Rome, Italy
| | - Mara Bonelli
- Department of Medicine and Surgery, University of Parma, 43126, Parma, Italy
| | - Claudia Fumarola
- Department of Medicine and Surgery, University of Parma, 43126, Parma, Italy
| | - Andrea Cavazzoni
- Department of Medicine and Surgery, University of Parma, 43126, Parma, Italy
| | - Lisa Flammini
- Department of Food and Drug, University of Parma, 43124, Parma, Italy
| | - Michela Verzè
- Medical Oncology Unit, University Hospital of Parma, 43126, Parma, Italy
| | - Roberta Minari
- Medical Oncology Unit, University Hospital of Parma, 43126, Parma, Italy
| | | | - Marcello Tiseo
- Department of Medicine and Surgery, University of Parma, 43126, Parma, Italy.
- Medical Oncology Unit, University Hospital of Parma, 43126, Parma, Italy.
| | - Marco Mor
- Department of Food and Drug, University of Parma, 43124, Parma, Italy
| | - Roberta Alfieri
- Department of Medicine and Surgery, University of Parma, 43126, Parma, Italy
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2
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Li D, Huang LT, Zhang CP, Li Q, Wang JH. Insights Into the Role of Platelet-Derived Growth Factors: Implications for Parkinson’s Disease Pathogenesis and Treatment. Front Aging Neurosci 2022; 14:890509. [PMID: 35847662 PMCID: PMC9283766 DOI: 10.3389/fnagi.2022.890509] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 06/06/2022] [Indexed: 11/13/2022] Open
Abstract
Parkinson’s disease (PD), the second most common neurodegenerative disease after Alzheimer’s disease, commonly occurs in the elderly population, causing a significant medical and economic burden to the aging society worldwide. At present, there are few effective methods that achieve satisfactory clinical results in the treatment of PD. Platelet-derived growth factors (PDGFs) and platelet-derived growth factor receptors (PDGFRs) are important neurotrophic factors that are expressed in various cell types. Their unique structures allow for specific binding that can effectively regulate vital functions in the nervous system. In this review, we summarized the possible mechanisms by which PDGFs/PDGFRs regulate the occurrence and development of PD by affecting oxidative stress, mitochondrial function, protein folding and aggregation, Ca2+ homeostasis, and cell neuroinflammation. These modes of action mainly depend on the type and distribution of PDGFs in different nerve cells. We also summarized the possible clinical applications and prospects for PDGF in the treatment of PD, especially in genetic treatment. Recent advances have shown that PDGFs have contradictory roles within the central nervous system (CNS). Although they exert neuroprotective effects through multiple pathways, they are also associated with the disruption of the blood–brain barrier (BBB). Our recommendations based on our findings include further investigation of the contradictory neurotrophic and neurotoxic effects of the PDGFs acting on the CNS.
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Affiliation(s)
- Dan Li
- Department of Family Medicine, Shengjing Hospital of China Medical University, Shenyang, China
| | - Le-Tian Huang
- Department of Oncology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Cheng-pu Zhang
- Department of Family Medicine, Shengjing Hospital of China Medical University, Shenyang, China
| | - Qiang Li
- Department of Laboratory Medicine, Shengjing Hospital of China Medical University, Shenyang, China
- *Correspondence: Qiang Li,
| | - Jia-He Wang
- Department of Family Medicine, Shengjing Hospital of China Medical University, Shenyang, China
- Jia-He Wang,
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3
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A comprehensive review on natural occurrence, synthesis and biological activities of glycolipids. Carbohydr Res 2022; 516:108556. [DOI: 10.1016/j.carres.2022.108556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 03/30/2022] [Accepted: 04/05/2022] [Indexed: 01/10/2023]
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Ouro A, Correa-Paz C, Maqueda E, Custodia A, Aramburu-Núñez M, Romaus-Sanjurjo D, Posado-Fernández A, Candamo-Lourido M, Alonso-Alonso ML, Hervella P, Iglesias-Rey R, Castillo J, Campos F, Sobrino T. Involvement of Ceramide Metabolism in Cerebral Ischemia. Front Mol Biosci 2022; 9:864618. [PMID: 35531465 PMCID: PMC9067562 DOI: 10.3389/fmolb.2022.864618] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/11/2022] [Indexed: 12/12/2022] Open
Abstract
Ischemic stroke, caused by the interruption of blood flow to the brain and subsequent neuronal death, represents one of the main causes of disability in worldwide. Although reperfusion therapies have shown efficacy in a limited number of patients with acute ischemic stroke, neuroprotective drugs and recovery strategies have been widely assessed, but none of them have been successful in clinical practice. Therefore, the search for new therapeutic approaches is still necessary. Sphingolipids consist of a family of lipidic molecules with both structural and cell signaling functions. Regulation of sphingolipid metabolism is crucial for cell fate and homeostasis in the body. Different works have emphasized the implication of its metabolism in different pathologies, such as diabetes, cancer, neurodegeneration, or atherosclerosis. Other studies have shown its implication in the risk of suffering a stroke and its progression. This review will highlight the implications of sphingolipid metabolism enzymes in acute ischemic stroke.
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Affiliation(s)
- Alberto Ouro
- NeuroAging Group (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Clara Correa-Paz
- Translational Stroke Laboratory Group (TREAT), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Elena Maqueda
- Neuroimaging and Biotechnology Laboratory (NOBEL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Antía Custodia
- NeuroAging Group (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Marta Aramburu-Núñez
- NeuroAging Group (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Daniel Romaus-Sanjurjo
- NeuroAging Group (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Adrián Posado-Fernández
- NeuroAging Group (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - María Candamo-Lourido
- Translational Stroke Laboratory Group (TREAT), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Maria Luz Alonso-Alonso
- Neuroimaging and Biotechnology Laboratory (NOBEL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Pablo Hervella
- Neuroimaging and Biotechnology Laboratory (NOBEL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Ramón Iglesias-Rey
- Neuroimaging and Biotechnology Laboratory (NOBEL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - José Castillo
- Neuroimaging and Biotechnology Laboratory (NOBEL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Francisco Campos
- Translational Stroke Laboratory Group (TREAT), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Tomás Sobrino
- NeuroAging Group (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
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Sindhu S, Leung YH, Arefanian H, Madiraju SRM, Al‐Mulla F, Ahmad R, Prentki M. Neutral sphingomyelinase-2 and cardiometabolic diseases. Obes Rev 2021; 22:e13248. [PMID: 33738905 PMCID: PMC8365731 DOI: 10.1111/obr.13248] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/18/2021] [Accepted: 02/26/2021] [Indexed: 12/13/2022]
Abstract
Sphingolipids, in particular ceramides, play vital role in pathophysiological processes linked to metabolic syndrome, with implications in the development of insulin resistance, pancreatic ß-cell dysfunction, type 2 diabetes, atherosclerosis, inflammation, nonalcoholic steatohepatitis, and cancer. Ceramides are produced by the hydrolysis of sphingomyelin, catalyzed by different sphingomyelinases, including neutral sphingomyelinase 2 (nSMase2), whose dysregulation appears to underlie many of the inflammation-related pathologies. In this review, we discuss the current knowledge on the biochemistry of nSMase2 and ceramide production and its regulation by inflammatory cytokines, with particular reference to cardiometabolic diseases. nSMase2 contribution to pathogenic processes appears to involve cyclical feed-forward interaction with proinflammatory cytokines, such as TNF-α and IL-1ß, which activate nSMase2 and the production of ceramides, that in turn triggers the synthesis and release of inflammatory cytokines. We elaborate these pathogenic interactions at the molecular level and discuss the potential therapeutic benefits of inhibiting nSMase2 against inflammation-driven cardiometabolic diseases.
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Affiliation(s)
- Sardar Sindhu
- Animal and Imaging core facilityDasman Diabetes InstituteDasmanKuwait
| | - Yat Hei Leung
- Departments of Nutrition, Biochemistry and Molecular MedicineUniversity of MontrealMontréalQuebecCanada
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM)Montreal Diabetes Research CenterMontréalQuebecCanada
| | - Hossein Arefanian
- Immunology and Microbiology DepartmentDasman Diabetes InstituteDasmanKuwait
| | - S. R. Murthy Madiraju
- Departments of Nutrition, Biochemistry and Molecular MedicineUniversity of MontrealMontréalQuebecCanada
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM)Montreal Diabetes Research CenterMontréalQuebecCanada
| | - Fahd Al‐Mulla
- Department of Genetics and BioinformaticsDasman Diabetes InstituteDasmanKuwait
| | - Rasheed Ahmad
- Immunology and Microbiology DepartmentDasman Diabetes InstituteDasmanKuwait
| | - Marc Prentki
- Departments of Nutrition, Biochemistry and Molecular MedicineUniversity of MontrealMontréalQuebecCanada
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM)Montreal Diabetes Research CenterMontréalQuebecCanada
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Sadras V, Petri MA, Jones SR, Peterlin BL, Chatterjee S. Glycosphingolipid-associated β-1,4 galactosyltransferase is elevated in patients with systemic lupus erythematosus. Lupus Sci Med 2021; 7:7/1/e000368. [PMID: 32665303 PMCID: PMC7359192 DOI: 10.1136/lupus-2019-000368] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 05/30/2020] [Accepted: 06/04/2020] [Indexed: 12/13/2022]
Abstract
OBJECTIVE β-1,4 galactosyltransferase-V (β-1,4 GalT-V) is an enzyme that synthesises a glycosphingolipid known as lactosylceramide, which has been implicated in general inflammation and atherosclerosis. We asked if β-1,4 GalT-V was present at elevated levels in patients with SLE, a disease which is associated with increased risk of atherosclerosis. METHODS In this case-control observational study, serum samples were obtained from patients with SLE who are part of the Johns Hopkins Lupus Cohort. Control serum samples were obtained from healthy adult community members recruited from the Baltimore area. All serum samples (n=50 in the SLE group and n=50 in the healthy control group) were analysed with enzyme-linked immunoassays. These assays used antibodies raised against antigens that enabled us to measure the absorbance of oxidised phosphocholines per apolipoprotein B-100 (ox-PC/apoB) and the concentration of lipoprotein(a) (Lp(a)) and β-1,4 GalT-V. RESULTS Absorbance of ox-PC/apoB and concentrations of Lp(a) and β-1,4 GalT-V were significantly higher in the SLE serum samples as compared with the control serum (p<0.0001). CONCLUSIONS We conclude that patients with SLE have elevated levels of β-1,4 GalT-V and ox-PC, which have previously been recognised as risk factors for atherosclerosis.
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Affiliation(s)
- Vignesh Sadras
- Department of Pediatrics, Johns Hopkins University, Baltimore, Maryland, USA
| | - Michelle A Petri
- Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Steven Richard Jones
- Heart and Vascular Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Barbara Lee Peterlin
- Lancaster General Health Physicians, Penn Medicine, Lancaster, Pennsylvania, USA
| | - Subroto Chatterjee
- Division of Pediatric Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Chatterjee S, Balram A, Li W. Convergence: Lactosylceramide-Centric Signaling Pathways Induce Inflammation, Oxidative Stress, and Other Phenotypic Outcomes. Int J Mol Sci 2021; 22:ijms22041816. [PMID: 33673027 PMCID: PMC7917694 DOI: 10.3390/ijms22041816] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/02/2021] [Accepted: 02/06/2021] [Indexed: 12/19/2022] Open
Abstract
Lactosylceramide (LacCer), also known as CD17/CDw17, is a member of a large family of small molecular weight compounds known as glycosphingolipids. It plays a pivotal role in the biosynthesis of glycosphingolipids, primarily by way of serving as a precursor to the majority of its higher homolog sub-families such as gangliosides, sulfatides, fucosylated-glycosphingolipids and complex neutral glycosphingolipids—some of which confer “second-messenger” and receptor functions. LacCer is an integral component of the “lipid rafts,” serving as a conduit to transduce external stimuli into multiple phenotypes, which may contribute to mortality and morbidity in man and in mouse models of human disease. LacCer is synthesized by the action of LacCer synthase (β-1,4 galactosyltransferase), which transfers galactose from uridine diphosphate galactose (UDP-galactose) to glucosylceramide (GlcCer). The convergence of multiple physiologically relevant external stimuli/agonists—platelet-derived growth factor (PDGF), vascular endothelial growth factor (VEGF), stress, cigarette smoke/nicotine, tumor necrosis factor-α (TNF-α), and in particular, oxidized low-density lipoprotein (ox-LDL)—on β-1,4 galactosyltransferase results in its phosphorylation or activation, via a “turn-key” reaction, generating LacCer. This newly synthesized LacCer activates NADPH (nicotinamide adenine dihydrogen phosphate) oxidase to generate reactive oxygen species (ROS) and a highly “oxidative stress” environment, which trigger a cascade of signaling molecules and pathways and initiate diverse phenotypes like inflammation and atherosclerosis. For instance, LacCer activates an enzyme, cytosolic phospholipase A2 (cPLA2), which cleaves arachidonic acid from phosphatidylcholine. In turn, arachidonic acid serves as a precursor to eicosanoids and prostaglandin, which transduce a cascade of reactions leading to inflammation—a major phenotype underscoring the initiation and progression of several debilitating diseases such as atherosclerosis and cancer. Our aim here is to present an updated account of studies made in the field of LacCer metabolism and signaling using multiple animal models of human disease, human tissue, and cell-based studies. These advancements have led us to propose that previously unrelated phenotypes converge in a LacCer-centric manner. This LacCer synthase/LacCer-induced “oxidative stress” environment contributes to inflammation, atherosclerosis, skin conditions, hair greying, cardiovascular disease, and diabetes due to mitochondrial dysfunction. Thus, targeting LacCer synthase may well be the answer to remedy these pathologies.
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Hou W, Chen Q, Wang H, Qiu P, Lyu X, Chen W, Chua MLK, Chinn YE, Deng CX, Wang R. The metabolic footprint during adipocyte commitment highlights ceramide modulation as an adequate approach for obesity treatment. EBioMedicine 2020; 51:102605. [PMID: 31901865 PMCID: PMC6940659 DOI: 10.1016/j.ebiom.2019.102605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 12/12/2019] [Accepted: 12/12/2019] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Metabolic modulation is capable of maintaining cell potency, regulating niche homeostasis, or determining cell fate. However, little is known regarding the metabolic landscape during early adipogenesis or whether metabolic modulation could be a potential approach for obesity treatment. METHODS The metabolic footprint during adipocyte commitment was evaluated by metabolomics analysis in mouse embryonic fibroblasts (MEFs). The role of apoptosis induced by ceramide and how ceramide is regulated were evaluated by omics analysis in vitro, human database and the adipocyte-specific Sirt1 knockout mouse. FINDINGS The metabolic footprint showed that a complicated diversity of metabolism was enriched as early as 3 h and tended to fluctuate throughout differentiation. Subsequently, the scale of these perturbed metabolic patterns was reduced to reach a balanced state. Of high relevance is the presence of apoptosis induced by ceramide accumulation, which is associated with metabolic dynamics. Interestingly, apoptotic cells were not merely a byproduct of adipogenesis but rather promoted the release of lipid components to facilitate adipogenesis. Mechanistically, ceramide accumulation stemming from hydrolysis and the de novo pathway during early adipogenesis is regulated by Sirt1 upon epigenetic alterations of constitutive Histone H3K4 methylation and H3K9 acetylation. INTERPRETATION The metabolic footprint during adipocyte commitment highlights that apoptosis induced by ceramide is essential for adipogenesis, which is reversed by suppression of Sirt1. Therefore, Sirt1 may constitute a target to treat obesity or other ceramide-associated metabolic syndromes. FUNDING This project was supported by grants from the University of Macau (SRG2015-00008-FHS, MYRG2016-00054-FHS and MYRG2017-00096-FHS to RHW; CPG2019-00019-FHS to CXD) and from the National Natural Science Foundation of China (81672603 and 81401978) to QC.
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Affiliation(s)
- Weilong Hou
- Faculty of Health Sciences, University of Macau, Macau SAR, China
| | - Qiang Chen
- Faculty of Health Sciences, University of Macau, Macau SAR, China
| | - Haitao Wang
- Faculty of Health Sciences, University of Macau, Macau SAR, China; Division of Radiation Oncology, National Cancer Centre Singapore, Singapore; Division of Medical Sciences, National Cancer Centre Singapore, Singapore; Oncology Academic Programme, Duke-NUS Medical School, Singapore
| | - Pengxiang Qiu
- Faculty of Health Sciences, University of Macau, Macau SAR, China
| | - Xueying Lyu
- Faculty of Health Sciences, University of Macau, Macau SAR, China
| | - Weiping Chen
- National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, United States
| | - Melvin L K Chua
- Division of Radiation Oncology, National Cancer Centre Singapore, Singapore; Division of Medical Sciences, National Cancer Centre Singapore, Singapore; Oncology Academic Programme, Duke-NUS Medical School, Singapore
| | - Y Eugene Chinn
- Institute of Biology and Medical Sciences, Soochow University School of Medicine, 199# Ren'ai Road, Suzhou Jiangsu 215123, China
| | - Chu-Xia Deng
- Faculty of Health Sciences, University of Macau, Macau SAR, China.
| | - Ruihong Wang
- Faculty of Health Sciences, University of Macau, Macau SAR, China; Center for Cancer Research, Nation Cancer Institute, National Institutes of Health, Bethesda, MD 20892, United States.
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Bhat SA, Ahmad SM, Ibeagha-Awemu EM, Bhat BA, Dar MA, Mumtaz PT, Shah RA, Ganai NA. Comparative transcriptome analysis of mammary epithelial cells at different stages of lactation reveals wide differences in gene expression and pathways regulating milk synthesis between Jersey and Kashmiri cattle. PLoS One 2019; 14:e0211773. [PMID: 30721247 PMCID: PMC6363229 DOI: 10.1371/journal.pone.0211773] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 01/22/2019] [Indexed: 11/19/2022] Open
Abstract
Jersey and Kashmiri cattle are important dairy breeds that contribute significantly to the total milk production of the Indian northern state of Jammu and Kashmir. The Kashmiri cattle germplasm has been extensively diluted through crossbreeding with Jersey cattle with the goal of enhancing its milk production ability. However, crossbred animals are prone to diseases resulting to unsustainable milk production. This study aimed to provide a comprehensive transcriptome profile of mammary gland epithelial cells at different stages of lactation and to find key differences in genes and pathways regulating milk traits between Jersey and Kashmiri cattle. Mammary epithelial cells (MEC) isolated from milk obtained from six lactating cows (three Jersey and three Kashmiri cattle) on day 15 (D15), D90 and D250 in milk, representing early, mid and late lactation, respectively were used. RNA isolated from MEC was subjected to next-generation RNA sequencing and bioinformatics processing. Casein and whey protein genes were found to be highly expressed throughout the lactation stages in both breeds. Largest differences in differentially expressed genes (DEG) were between D15 vs D90 (1,805 genes) in Kashmiri cattle and, D15 vs D250 (3,392 genes) in Jersey cattle. A total of 1,103, 1,356 and 1,397 genes were differentially expressed between Kashmiri and Jersey cattle on D15, D90 and D250, respectively. Antioxidant genes like RPLPO and RPS28 were highly expressed in Kashmiri cattle. Differentially expressed genes in both Kashmiri and Jersey were enriched for multicellular organismal process, receptor activity, catalytic activity, signal transducer activity, macromolecular complex and developmental process gene ontology terms. Whereas, biological regulation, endopeptidase activity and response to stimulus were enriched in Kashmiri cattle and, reproduction and immune system process were enriched in Jersey cattle. Most of the pathways responsible for regulation of milk production like JAK-STAT, p38 MAPK pathway, PI3 kinase pathway were enriched by DEG in Jersey cattle only. Although Kashmiri has poor milk production efficiency, the present study suggests possible physicochemical and antioxidant properties of Kashmiri cattle milk that needs to be further explored.
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Affiliation(s)
- Shakil Ahmad Bhat
- Division of Animal Biotechnology, Faculty of Veterinary Sciences and Animal Husbandry, SKUAST-Kashmir, India
| | - Syed Mudasir Ahmad
- Division of Animal Biotechnology, Faculty of Veterinary Sciences and Animal Husbandry, SKUAST-Kashmir, India
- * E-mail:
| | - Eveline M. Ibeagha-Awemu
- Agriculture and Agri-Food Canada, Sherbrooke Research and Development Centre, Sherbrooke, Quebec, Canada
| | - Basharat A. Bhat
- Department of Life Science, Shiv Nadar University, Greater Noida, Uttar Pradesh, India
| | - Mashooq Ahmad Dar
- Division of Animal Biotechnology, Faculty of Veterinary Sciences and Animal Husbandry, SKUAST-Kashmir, India
| | - Peerzada Tajamul Mumtaz
- Division of Animal Biotechnology, Faculty of Veterinary Sciences and Animal Husbandry, SKUAST-Kashmir, India
| | - Riaz A. Shah
- Division of Animal Biotechnology, Faculty of Veterinary Sciences and Animal Husbandry, SKUAST-Kashmir, India
| | - Nazir A. Ganai
- Division of Animal Genetics and Breeding, Faculty of Veterinary Sciences and Animal Husbandry, SKUAST-Kashmir, India
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Ling YS, Lim LR, Yong YS, Tamin O, Puah PY. MS-based metabolomics revealing Bornean Sinularia sp. extract dysregulated lipids triggering programmed cell death in Hepatocellular carcinoma. Nat Prod Res 2018; 34:1796-1803. [PMID: 30587039 DOI: 10.1080/14786419.2018.1531288] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Soft coral, Sinularia sp. had been proven to inherit promising anti-cancer properties against variety of cancer. Current study, Sinularia sp. extract was introduced to Hepatocellular carcinoma (Hep 3B). Cell viability assay indicated the extract exhibit a dose and time dependent cytotoxicity. LC50 exhibited the lowest at 72 h post treatment estimated as 45.3 µg/mL. Morphological alterations including nuclear condensation, cytoplasm shrinkage and deformed cellular shape in treated Hep 3B were observable. Chemometric analysis revealed hydrophobic metabolites were significantly altered. Elevated vitamin D and derivatives tend to up-regulation Ca2+ and ROS subsequently triggering apoptosis. Dysregulated glycerolipids may suggest that they were biotransformed to compensate the needs of phospholipids during cell damage. Perturbation of sphingolipids, ceramide and carbohydrate-conjugated ceramides species increased the release of pro-apoptotic components reside within mitochondria and promote programmed cell death in treated Hep 3B. To conclude, MS-based metabolomics enabled the characterization of Sinularia sp. extract-induced cell death.
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Affiliation(s)
- Yee Soon Ling
- Biotechnology Research Institute, Universiti Malaysia Sabah, Sabah, Malaysia.,Water Research Unit, Universiti Malaysia Sabah, Sabah, Malaysia
| | - Leong Rui Lim
- Biotechnology Research Institute, Universiti Malaysia Sabah, Sabah, Malaysia
| | - Yoong Soon Yong
- Biotechnology Research Institute, Universiti Malaysia Sabah, Sabah, Malaysia
| | - Oriana Tamin
- Biotechnology Research Institute, Universiti Malaysia Sabah, Sabah, Malaysia
| | - Perng Yang Puah
- Faculty of Sciences and Natural Resources, Universiti Malaysia Sabah, Sabah, Malaysia
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11
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Inhibition of glycosphingolipid synthesis reverses skin inflammation and hair loss in ApoE-/- mice fed western diet. Sci Rep 2018; 8:11463. [PMID: 30061606 PMCID: PMC6065400 DOI: 10.1038/s41598-018-28663-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 06/18/2018] [Indexed: 01/19/2023] Open
Abstract
Sphingolipids have been accorded numerous biological functions however, the effects of feeding a western diet (diet rich in cholesterol and fat) on skin phenotypes, and color is not known. Here, we observed that chronic high-fat and high-cholesterol diet intake in a mouse model of atherosclerosis (ApoE-/-) decreases the level of ceramides and glucosylceramide. At the expense of increased levels of lactosylceramide due to an increase in the expression of lactosylceramide synthase (GalT-V). This is accompanied with neutrophil infiltration into dermis, and enrichment of tumor necrosis factor-stimulated gene-6 (TSG-6) protein. This causes skin inflammation, hair discoloration and loss, in ApoE-/- mice. Conversely, inhibition of glycosphingolipid synthesis, by D-threo-1-phenyl-2-decanoylamino-3-morpholino-1-propanol (D-PDMP), unbound or encapsulated in a biodegradable polymer (BPD) reversed these phenotypes. Thus, inhibition of glycosphingolipid synthesis represents a unique therapeutic approach relevant to human skin and hair Biology.
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Martineau C, Naja RP, Husseini A, Hamade B, Kaufmann M, Akhouayri O, Arabian A, Jones G, St-Arnaud R. Optimal bone fracture repair requires 24R,25-dihydroxyvitamin D3 and its effector molecule FAM57B2. J Clin Invest 2018; 128:3546-3557. [PMID: 30010626 DOI: 10.1172/jci98093] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 05/08/2018] [Indexed: 12/18/2022] Open
Abstract
The biological activity of 24R,25-dihydroxyvitamin D3 [24R,25(OH)2D3] remains controversial, but it has been suggested that it contributes to fracture healing. Cyp24a1-/- mice, synthesizing no 24R,25(OH)2D3, show suboptimal endochondral ossification during fracture repair, with smaller callus and reduced stiffness. These defects were corrected by 24R,25(OH)2D3 treatment, but not by 1,25-dihydroxyvitamin D3. Microarrays with Cyp24a1-/- callus mRNA identified FAM57B2 as a mediator of the 24R,25(OH)2D3 effect. FAM57B2 produced lactosylceramide (LacCer) upon specific binding of 24R,25(OH)2D3. Fam57b inactivation in chondrocytes (Col2-Cre Fam57bfl/fl) phenocopied the callus formation defect of Cyp24a1-/- mice. LacCer or 24R,25(OH)2D3 injections restored callus volume, stiffness, and mineralized cartilage area in Cyp24a1-null mice, but only LacCer rescued Col2-Cre Fam57bfl/fl mice. Gene expression in callus tissue suggested that the 24R,25(OH)2D3/FAM57B2 cascade affects cartilage maturation. We describe a previously unrecognized pathway influencing endochondral ossification during bone repair through LacCer production upon binding of 24R,25(OH)2D3 to FAM57B2. Our results identify potential new approaches to ameliorate fracture healing.
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Affiliation(s)
- Corine Martineau
- Research Centre, Shriners Hospitals for Children - Canada, Montreal, Quebec, Canada
| | - Roy Pascal Naja
- Research Centre, Shriners Hospitals for Children - Canada, Montreal, Quebec, Canada.,Department of Human Genetics, and
| | - Abdallah Husseini
- Research Centre, Shriners Hospitals for Children - Canada, Montreal, Quebec, Canada.,Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Bachar Hamade
- Research Centre, Shriners Hospitals for Children - Canada, Montreal, Quebec, Canada.,Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Martin Kaufmann
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Omar Akhouayri
- Research Centre, Shriners Hospitals for Children - Canada, Montreal, Quebec, Canada
| | - Alice Arabian
- Research Centre, Shriners Hospitals for Children - Canada, Montreal, Quebec, Canada
| | - Glenville Jones
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - René St-Arnaud
- Research Centre, Shriners Hospitals for Children - Canada, Montreal, Quebec, Canada.,Department of Human Genetics, and.,Department of Surgery, McGill University, Montreal, Quebec, Canada.,Department of Medicine, McGill University, Montreal, Quebec, Canada.,Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
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Abstract
For many years, neutral sphingomyelinases (N-SMases) were long thought to be anticancer enzymes owing to their roles as key producers of ceramide linked to apoptosis, growth arrest, and the chemotherapeutic response. However, in recent years, with the cloning of multiple isoforms and with new information on their cellular roles, particularly for nSMase2, a more complex picture is emerging suggesting that N-SMases have both pro- and anticancer roles. In this chapter, we will summarize current knowledge on N-SMase expression in cancer and the roles of N-SMase activity and specific isoforms in cancer-relevant biologies. We will also discuss what we see as the major challenges ahead for research into N-SMases in cancer.
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Affiliation(s)
- Christopher J Clarke
- Department of Medicine and Cancer Center, Stony Brook University, Stony Brook, NY, United States
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Nakamura H, Moriyama Y, Watanabe K, Tomizawa S, Yamazaki R, Takahashi H, Murayama T. Lactosylceramide-Induced Phosphorylation Signaling to Group IVA Phospholipase A 2 via Reactive Oxygen Species in Tumor Necrosis Factor-α-Treated Cells. J Cell Biochem 2017; 118:4370-4382. [PMID: 28444900 DOI: 10.1002/jcb.26091] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 04/24/2017] [Indexed: 12/16/2022]
Abstract
The activity of α-type cytosolic phospholipase A2 (cPLA2 α, group IVA PLA2 ), which releases arachidonic acid (AA), is mainly regulated by the Ca2+ -induced intracellular translocation/attachment of the enzyme to substrate membranes and its phosphorylation. We previously reported that tumor necrosis factor-α (TNFα) stimulated the formation of lactosylceramide (LacCer) in L929 fibroblast cells, and this lipid directly bound with and activated cPLA2 α [Nakamura et al. [2013] J. Biol. Chem. 288:23264-23272]. We herein investigated the role of phosphorylation signaling in the TNFα/LacCer-induced activation of cPLA2 α in cells. TNFα-treated L929 cells released AA via the phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2) and cPLA2 α, while a treatment with LacCer alone released AA in a similar manner. The TNFα-induced responses including release of AA were decreased by the inhibition of LacCer synthesis. The treatment with TNFα and LacCer increased the levels of reactive oxygen species (ROS), and the reduction/scavenging of ROS decreased the phosphorylation cascade and release of AA in TNFα/LacCer-treated L929 cells. In the cell line CHO, the treatment with LacCer stimulated the phosphorylation cascade and release of AA via the formation of ROS. Treatments with the anti-LacCer antibody and 4β-phorbol 12-myristate 13-acetate stimulated the phosphorylation cascade, but did not release AA by itself. When combined with the Ca2+ ionophore A23187, treatments with the anti-LacCer antibody and 4β-phorbol 12-myristate 13-acetate released AA. These results, including our previous findings, showed that LacCer alone simultaneously stimulates two processes to activate cPLA2 α: a phosphorylation signal and attachment of the enzyme to substrate membranes. J. Cell. Biochem. 118: 4370-4382, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Hiroyuki Nakamura
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Yuta Moriyama
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Kazuaki Watanabe
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Satoshi Tomizawa
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Risa Yamazaki
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Hiromasa Takahashi
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Toshihiko Murayama
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
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15
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Edsfeldt A, Dunér P, Ståhlman M, Mollet IG, Asciutto G, Grufman H, Nitulescu M, Persson AF, Fisher RM, Melander O, Orho-Melander M, Borén J, Nilsson J, Gonçalves I. Sphingolipids Contribute to Human Atherosclerotic Plaque Inflammation. Arterioscler Thromb Vasc Biol 2016; 36:1132-40. [DOI: 10.1161/atvbaha.116.305675] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Accepted: 03/23/2016] [Indexed: 11/16/2022]
Affiliation(s)
- Andreas Edsfeldt
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Pontus Dunér
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Marcus Ståhlman
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Ines G. Mollet
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Giuseppe Asciutto
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Helena Grufman
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Mihaela Nitulescu
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Ana Flor Persson
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Rachel M. Fisher
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Olle Melander
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Marju Orho-Melander
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Jan Borén
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Jan Nilsson
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
| | - Isabel Gonçalves
- From the Experimental Cardiovascular Research Unit, Clinical Research Centre, Clinical Sciences Malmö, Lund University, Malmö, Sweden (A.E., P.D., G.A., H.G., M.N., A.F.P., J.N., I.G.); Vascular Centre Malmö-Lund, Skåne, University Hospital, Malmö, Sweden (G.A.); Department of Cardiology, Skåne University Hospital, Lund/Malmö, Sweden (A.E., H.G., A.F.P., I.G.); Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Sahlgrenska University Hospital University, Gothenburg, Sweden (M.S., J
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Lorza-Gil E, Salerno AG, Wanschel ACBA, Vettorazzi JF, Ferreira MS, Rentz T, Catharino RR, Oliveira HCF. Chronic use of pravastatin reduces insulin exocytosis and increases β-cell death in hypercholesterolemic mice. Toxicology 2016; 344-346:42-52. [PMID: 26875785 DOI: 10.1016/j.tox.2015.12.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 12/14/2015] [Accepted: 12/22/2015] [Indexed: 02/04/2023]
Abstract
We have previously demonstrated that hypercholesterolemic LDL receptor knockout (LDLr(-/-)) mice secrete less insulin than wild-type mice. Removing cholesterol from isolated islets using methyl-beta-cyclodextrin reversed this defect. In this study, we hypothesized that in vivo treatment of LDLr(-/-) mice with the HMGCoA reductase inhibitor pravastatin would improve glucose-stimulated insulin secretion. Female LDLr(-/-) mice were treated with pravastatin (400mg/L) for 1-3 months. Isolated pancreatic islets were assayed for insulin secretion rates, intracellular calcium oscillations, cholesterol levels, NAD(P)H and SNARE protein levels, apoptosis indicators and lipidomic profile. Two months pravastatin treatment reduced cholesterol levels in plasma, liver and islets by 35%, 25% and 50%, respectively. Contrary to our hypothesis, pravastatin treatment increased fasting and fed plasma levels of glucose and decreased markedly (40%) fed plasma levels of insulin. In addition, ex vivo glucose stimulated insulin secretion was significantly reduced after two and three months (36-48%, p<0.05) of pravastatin treatment. Although reducing insulin secretion and insulinemia, two months pravastatin treatment did not affect glucose tolerance because it improved global insulin sensitivity. Pravastatin induced islet dysfunction was associated with marked reductions of exocytosis-related SNARE proteins (SNAP25, Syntaxin 1A, VAMP2) and increased apoptosis markers (Bax/Bcl2 protein ratio, cleaved caspase-3 and lower NAD(P)H production rates) observed in pancreatic islets from treated mice. In addition, several oxidized phospholipids, tri- and diacylglycerols and the proapoptotic lipid molecule ceramide were identified as markers of pravastatin-treated islets. Cell death and oxidative stress (H2O2 production) were confirmed in insulin secreting INS-1E cells treated with pravastatin. These results indicate that chronic treatment with pravastatin impairs the insulin exocytosis machinery and increases β-cell death. These findings suggest that prolonged use of statins may have a diabetogenic effect.
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Affiliation(s)
- Estela Lorza-Gil
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, SP, Brazil
| | - Alessandro G Salerno
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, SP, Brazil
| | - Amarylis C B A Wanschel
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, SP, Brazil
| | - Jean F Vettorazzi
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, SP, Brazil
| | - Mônica S Ferreira
- Department of Clinical Pathology, Faculty of Medical Sciences, State University of Campinas, Campinas, SP, Brazil
| | - Thiago Rentz
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, SP, Brazil
| | - Rodrigo R Catharino
- Department of Clinical Pathology, Faculty of Medical Sciences, State University of Campinas, Campinas, SP, Brazil
| | - Helena C F Oliveira
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, SP, Brazil.
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Lactosylceramide-accumulation in lipid-rafts mediate aberrant-autophagy, inflammation and apoptosis in cigarette smoke induced emphysema. Apoptosis 2015; 20:725-39. [PMID: 25638276 DOI: 10.1007/s10495-015-1098-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Ceramide-accumulation is known to be involved in the pathogenesis of chronic inflammatory lung diseases including cigarette smoke-induced emphysema (CS-emphysema) but the exact sphingolipid metabolite that initiates emphysema progression remains ambiguous. We evaluated here a novel role for the sphingolipid, lactosylceramide (LacCer), as a potential mechanism for pathogenesis of CS-emphysema. We assessed the expression of LacCer, and LacCer-dependent inflammatory, apoptosis and autophagy responses in lungs of mice exposed to CS, as well as peripheral lung tissues from COPD subjects followed by experimental analysis to verify the role of LacCer in CS-emphysema. We observed significantly elevated LacCer-accumulation in human COPD lungs with increasing severity of emphysema over non-emphysema controls. Moreover, increased expression of defective-autophagy marker, p62, in lung tissues of severe COPD subjects suggest that LacCer induced aberrant-autophagy may contribute to the pathogenesis of CS-emphysema. We verified that CS-extract treatment significantly induces LacCer-accumulation in both bronchial-epithelial cells (BEAS2B) and macrophages (Raw264.7) as a mechanism to initiate aberrant-autophagy (p62-accumulation) and apoptosis that was rescued by pharmacological inhibitor of LacCer-synthase. Further, we corroborated that CS exposure induces LacCer-accumulation in murine lungs that can be controlled by LacCer-synthase inhibitor. We propose LacCer-accumulation as a novel prognosticator of COPD-emphysema severity, and provide evidence on the therapeutic efficacy of LacCer-synthase inhibitor in CS induced COPD-emphysema.
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New vis-tas in lactosylceramide research. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 842:127-38. [PMID: 25408340 DOI: 10.1007/978-3-319-11280-0_8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Nakamura H, Moriyama Y, Makiyama T, Emori S, Yamashita H, Yamazaki R, Murayama T. Lactosylceramide interacts with and activates cytosolic phospholipase A2α. J Biol Chem 2013; 288:23264-72. [PMID: 23801329 DOI: 10.1074/jbc.m113.491431] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Lactosylceramide (LacCer) is a member of the glycosphingolipid family and is known to be a bioactive lipid in various cell physiological processes. However, the direct targets of LacCer and cellular events mediated by LacCer are largely unknown. In this study, we examined the effect of LacCer on the release of arachidonic acid (AA) and the activity of cytosolic phospholipase A2α (cPLA2α). In CHO-W11A cells, treatment with 1-phenyl-2-palmitoylamino-3-morpholino-1-propanol (PPMP), an inhibitor of glucosylceramide synthase, reduced the glycosphingolipid level, and the release of AA induced by A23187 or platelet-activating factor was inhibited. The addition of LacCer reversed the PPMP effect on the stimulus-induced AA release. Exogenous LacCer stimulated the release of AA, which was decreased by treatment with an inhibitor of cPLA2α or silencing of the enzyme. Treatment of CHO-W11A cells with LacCer induced the translocation of full-length cPLA2α and its C2 domain from the cytosol to the Golgi apparatus. LacCer also induced the translocation of the D43N mutant of cPLA2α. Treatment of L929 cells with TNF-α induced LacCer generation and mediated the translocation of cPLA2α and AA release, which was attenuated by treatment with PPMP. In vitro studies were then conducted to test whether LacCer interacts directly with cPLA2α. Phosphatidylcholine vesicles containing LacCer increased cPLA2α activity. LacCer bound to cPLA2α and its C2 domain in a Ca(2+)-independent manner. Thus, we propose that LacCer is a direct activator of cPLA2α.
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Affiliation(s)
- Hiroyuki Nakamura
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chuo-ku, Chiba 260-8675, Japan.
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Accumulation of long-chain glycosphingolipids during aging is prevented by caloric restriction. PLoS One 2011; 6:e20411. [PMID: 21687659 PMCID: PMC3110726 DOI: 10.1371/journal.pone.0020411] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Accepted: 05/02/2011] [Indexed: 12/11/2022] Open
Abstract
Background Chronic kidney disease and end-stage renal disease are major causes of morbidity and mortality that are seen far more commonly in the aged population. Interestingly, kidney function declines during aging even in the absence of underlying renal disease. Declining renal function has been associated with age-related cellular damage and dysfunction with reports of increased levels of apoptosis, necrosis, and inflammation in the aged kidney. Bioactive sphingolipids have been shown to regulate these same cellular processes, and have also been suggested to play a role in aging and cellular senescence. Methodology/Principal Findings We hypothesized that alterations in kidney sphingolipids play a role in the declining kidney function that occurs during aging. To begin to address this, the sphingolipid profile was measured in young (3 mo), middle aged (9 mo) and old (17 mo) C57BL/6 male mice. Interestingly, while modest changes in ceramides and sphingoid bases were evident in kidneys from older mice, the most dramatic elevations were seen in long-chain hexosylceramides (HexCer) and lactosylceramides (LacCer), with C14- and C16-lactosylceramides elevated as much as 8 and 12-fold, respectively. Increases in long-chain LacCers during aging are not exclusive to the kidney, as they also occur in the liver and brain. Importantly, caloric restriction, previously shown to prevent the declining kidney function seen in aging, inhibits accumulation of long-chain HexCer/LacCers and prevents the age-associated elevation of enzymes involved in their synthesis. Additionally, long-chain LacCers are also significantly elevated in human fibroblasts isolated from elderly individuals. Conclusion/Significance This study demonstrates accumulation of the glycosphingolipids HexCer and LacCer in several different organs in rodents and humans during aging. In addition, data demonstrate that HexCer and LacCer metabolism is regulated by caloric restriction. Taken together, data suggest that HexCer/LacCers are important mediators of cellular processes fundamental to mammalian aging.
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Wickramasinghe S, Hua S, Rincon G, Islas-Trejo A, German JB, Lebrilla CB, Medrano JF. Transcriptome profiling of bovine milk oligosaccharide metabolism genes using RNA-sequencing. PLoS One 2011; 6:e18895. [PMID: 21541029 PMCID: PMC3081824 DOI: 10.1371/journal.pone.0018895] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Accepted: 03/24/2011] [Indexed: 12/21/2022] Open
Abstract
This study examines the genes coding for enzymes involved in bovine milk oligosaccharide metabolism by comparing the oligosaccharide profiles with the expressions of glycosylation-related genes. Fresh milk samples (n = 32) were collected from four Holstein and Jersey cows at days 1, 15, 90 and 250 of lactation and free milk oligosaccharide profiles were analyzed. RNA was extracted from milk somatic cells at days 15 and 250 of lactation (n = 12) and gene expression analysis was conducted by RNA-Sequencing. A list was created of 121 glycosylation-related genes involved in oligosaccharide metabolism pathways in bovine by analyzing the oligosaccharide profiles and performing an extensive literature search. No significant differences were observed in either oligosaccharide profiles or expressions of glycosylation-related genes between Holstein and Jersey cows. The highest concentrations of free oligosaccharides were observed in the colostrum samples and a sharp decrease was observed in the concentration of free oligosaccharides on day 15, followed by progressive decrease on days 90 and 250. Ninety-two glycosylation-related genes were expressed in milk somatic cells. Most of these genes exhibited higher expression in day 250 samples indicating increases in net glycosylation-related metabolism in spite of decreases in free milk oligosaccharides in late lactation milk. Even though fucosylated free oligosaccharides were not identified, gene expression indicated the likely presence of fucosylated oligosaccharides in bovine milk. Fucosidase genes were expressed in milk and a possible explanation for not detecting fucosylated free oligosaccharides is the degradation of large fucosylated free oligosaccharides by the fucosidases. Detailed characterization of enzymes encoded by the 92 glycosylation-related genes identified in this study will provide the basic knowledge for metabolic network analysis of oligosaccharides in mammalian milk. These candidate genes will guide the design of a targeted breeding strategy to optimize the content of beneficial oligosaccharides in bovine milk.
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Affiliation(s)
- Saumya Wickramasinghe
- Department of Animal Science, University of California Davis, Davis, California, United States of America
| | - Serenus Hua
- Department of Chemistry, University of California Davis, Davis, California, United States of America
| | - Gonzalo Rincon
- Department of Animal Science, University of California Davis, Davis, California, United States of America
| | - Alma Islas-Trejo
- Department of Animal Science, University of California Davis, Davis, California, United States of America
| | - J. Bruce German
- Department of Food Science and Technology, University of California Davis, Davis, California, United States of America
| | - Carlito B. Lebrilla
- Department of Chemistry, University of California Davis, Davis, California, United States of America
| | - Juan F. Medrano
- Department of Animal Science, University of California Davis, Davis, California, United States of America
- * E-mail:
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Milhas D, Clarke CJ, Hannun YA. Sphingomyelin metabolism at the plasma membrane: implications for bioactive sphingolipids. FEBS Lett 2009; 584:1887-94. [PMID: 19857494 DOI: 10.1016/j.febslet.2009.10.058] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2009] [Revised: 10/19/2009] [Accepted: 10/20/2009] [Indexed: 12/24/2022]
Abstract
The plasma membrane (PM) is a major resource for production of bioactive lipids and contains a large proportion of the cellular sphingomyelin (SM) content. Consequently, the regulation of SM levels at the PM by enzymes such as sphingomyelinase (SMase) and SM synthase 2 (SMS2) can have profound effects - both on biophysical properties of the membrane, but also on cellular signaling. Over the past 20 years, there has been considerable research into the physiological and cellular functions associated with regulation of SM levels, notably with regards to the production of ceramide. In this review, we will summarize this research with particular focus on the SMases and SMS2. We will outline what biological functions are associated with SM metabolism/production at the PM, and discuss what we believe are major challenges that need to be addressed in future studies.
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Affiliation(s)
- Delphine Milhas
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
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Souady J, Soltwisch J, Dreisewerd K, Haier J, Peter-Katalinić J, Müthing J. Structural Profiling of Individual Glycosphingolipids in a Single Thin-Layer Chromatogram by Multiple Sequential Immunodetection Matched with Direct IR-MALDI-o-TOF Mass Spectrometry. Anal Chem 2009; 81:9481-92. [DOI: 10.1021/ac901948h] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jamal Souady
- Institute of Medical Physics and Biophysics and Institute for Hygiene, University of Münster, D-48149 Münster, Germany, and Department of General Surgery, Münster University Hospital, D-48149 Münster, Germany
| | - Jens Soltwisch
- Institute of Medical Physics and Biophysics and Institute for Hygiene, University of Münster, D-48149 Münster, Germany, and Department of General Surgery, Münster University Hospital, D-48149 Münster, Germany
| | - Klaus Dreisewerd
- Institute of Medical Physics and Biophysics and Institute for Hygiene, University of Münster, D-48149 Münster, Germany, and Department of General Surgery, Münster University Hospital, D-48149 Münster, Germany
| | - Jörg Haier
- Institute of Medical Physics and Biophysics and Institute for Hygiene, University of Münster, D-48149 Münster, Germany, and Department of General Surgery, Münster University Hospital, D-48149 Münster, Germany
| | - Jasna Peter-Katalinić
- Institute of Medical Physics and Biophysics and Institute for Hygiene, University of Münster, D-48149 Münster, Germany, and Department of General Surgery, Münster University Hospital, D-48149 Münster, Germany
| | - Johannes Müthing
- Institute of Medical Physics and Biophysics and Institute for Hygiene, University of Münster, D-48149 Münster, Germany, and Department of General Surgery, Münster University Hospital, D-48149 Münster, Germany
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Christophersen OA, Haug A. Why is the world so poorly prepared for a pandemic of hypervirulent avian influenza? MICROBIAL ECOLOGY IN HEALTH AND DISEASE 2009. [DOI: 10.1080/08910600600866544] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | - Anna Haug
- Norwegian University of Life Sciences, Ås, Norway
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25
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Moxnes JF, Albert christophersen O. The Spanish flu as a worst case scenario? MICROBIAL ECOLOGY IN HEALTH AND DISEASE 2009. [DOI: 10.1080/08910600701699067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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26
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The Yin and Yang of lactosylceramide metabolism: Implications in cell function. Biochim Biophys Acta Gen Subj 2008; 1780:370-82. [DOI: 10.1016/j.bbagen.2007.08.010] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2007] [Accepted: 08/13/2007] [Indexed: 11/18/2022]
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Immunohistochemical analysis of hepatic ganglioside distribution following a partial hepatectomy and exposure to different hyperbaric oxygen treatments. Acta Histochem 2008; 110:66-75. [PMID: 18035401 DOI: 10.1016/j.acthis.2007.09.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2006] [Revised: 09/04/2007] [Accepted: 09/24/2007] [Indexed: 11/20/2022]
Abstract
Ganglioside GM3(Neu5Ac) expression is highly increased in liver 54h following 15% partial hepatectomy in pre-operatively oxygenated rats. GM3(Neu5Gc), GM2, GalNAc-GM1b and gangliosides of the neolacto-series are less affected. GM3(Neu5Ac) is a potent inhibitor of epidermal growth factor signaling. Since GM3(Neu5Ac) growth inhibitory effect depends on its cellular localization, the aim of this study was to detect ganglioside cellular localization during liver regeneration. The experiment was performed using the same rat model which previously showed increased ganglioside expression and more efficient liver regeneration. Frozen sections of liver were analyzed using confocal microscopy after labeling for binding of five ganglioside-specific antibodies, with or without hepatocyte membrane permeabilization. Ganglioside precursors, ceramide (Cer), monohexaosylceramide and lactosylceramide (LacCer) were determined by high-performance thin-layer chromatography. Apoptosis was assessed by fluorescein-dUTP end-labeling of fragmented DNA. Liver of pre-operative oxygenated rats showed high perinuclear labeling of GM3(Neu5Ac) which was absent in post-operative oxygenated and control animals. In the same group, Cer content was lower, monohexaosylceramide and LacCer were absent, and content of apoptotic cells was significantly the lowest, compared to other groups examined (F=20.36, p=0.0001). These findings indicate that ganglioside GM3(Neu5Ac) may be involved in mediation of beneficial effects of pre-operatively oxygenation during the liver regeneration.
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Iwabuchi K, Prinetti A, Sonnino S, Mauri L, Kobayashi T, Ishii K, Kaga N, Murayama K, Kurihara H, Nakayama H, Yoshizaki F, Takamori K, Ogawa H, Nagaoka I. Involvement of very long fatty acid-containing lactosylceramide in lactosylceramide-mediated superoxide generation and migration in neutrophils. Glycoconj J 2007; 25:357-74. [PMID: 18041581 DOI: 10.1007/s10719-007-9084-6] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2007] [Revised: 10/16/2007] [Accepted: 11/01/2007] [Indexed: 01/12/2023]
Abstract
The neutral glycosphingolipid lactosylceramide (LacCer) forms lipid rafts (membrane microdomains) coupled with the Src family kinase Lyn on the plasma membranes of human neutrophils; ligand binding to LacCer activates Lyn, resulting in neutrophil functions, such as superoxide generation and migration (Iwabuchi and Nagaoka, Lactosylceramide-enriched glycosphingolipid signaling domain mediates superoxide generation from human neutrophils, Blood 100, 1454-1464, 2002 and Sato et al. Induction of human neutrophil chemotaxis by Candida albicans-derived beta-1,6-long glycoside side-chain-branched beta glycan, J. Leukoc. Biol. 84, 204-211, 2006). Neutrophilic differentiated HL-60 cells (D-HL-60 cells) express almost the same amount of LacCer as neutrophils. However, D-HL-60 cells do not have Lyn-associated LacCer-enriched lipid rafts and lack LacCer-mediated superoxide-generating and migrating abilities. Here, we examined the roles of LacCer molecular species of different fatty acid compositions in these processes. Liquid chromatography-mass spectrometry analyses revealed that the very long fatty acid C24:0 and C24:1 chains were the main components of LacCer (31.6% on the total fatty acid content) in the detergent-resistant membrane fraction (DRM) from neutrophil plasma membranes. In contrast, plasma membrane DRM of D-HL-60 cells included over 70% C16:0-LacCer, but only 13.6% C24-LacCer species. D-HL-60 cells loaded with C24:0 or C24:1-LacCer acquired LacCer-mediated migrating and superoxide-generating abilities, and allowed Lyn coimmunoprecipitation by anti-LacCer antibody. Lyn knockdown by siRNA completely abolished the effect of C24:1-LacCer loading on LacCer-mediated migration of D-HL-60 cells. Immunoelectron microscopy revealed that LacCer clusters were closely associated with Lyn molecules in neutrophils and C24:1-LacCer-loaded D-HL-60 cells, but not in D-HL-60 cells or C16:0-LacCer-loaded cells. Taken together, these observations suggest that LacCer species with very long fatty acids are specifically necessary for Lyn-coupled LacCer-enriched lipid raft-mediated neutrophil superoxide generation and migration.
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Affiliation(s)
- Kazuhisa Iwabuchi
- Institute for Environmental and Gender-specific Medicine, Juntendo University Graduate School of Medicine, 2-1-1 Tomioka, Urayasu-shi, Chiba, 279-0021, Japan.
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29
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Won JS, Singh AK, Singh I. Lactosylceramide: a lipid second messenger in neuroinflammatory disease. J Neurochem 2007; 103 Suppl 1:180-91. [DOI: 10.1111/j.1471-4159.2007.04822.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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