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Ramírez-Nuñez O, Jové M, Torres P, Sol J, Fontdevila L, Romero-Guevara R, Andrés-Benito P, Ayala V, Rossi C, Boada J, Povedano M, Ferrer I, Pamplona R, Portero-Otin M. Nuclear lipidome is altered in amyotrophic lateral sclerosis: A pilot study. J Neurochem 2021; 158:482-499. [PMID: 33905537 DOI: 10.1111/jnc.15373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 03/28/2021] [Accepted: 04/12/2021] [Indexed: 12/13/2022]
Abstract
Nucleocytosolic transport, a membrane process, is impaired in motor neurons in amyotrophic lateral sclerosis (ALS). This study analyzes the nuclear lipidome in motor neurons in ALS and examines molecular pathways linked to the major lipid alterations. Nuclei were obtained from the frozen anterior horn of the lumbar spinal cord of ALS patients and age-matched controls. Lipidomic profiles of this subcellular fraction were obtained using liquid chromatography and mass spectrometry. We validated the mechanisms behind presumable lipidomic changes by exploring ALS surrogate models including human motor neurons (derived from ALS lines and controls) subjected to oxidative stress, the hSOD-G93A transgenic mice, and samples from an independent cohort of ALS patients. Among the differential lipid species, we noted 41 potential identities, mostly belonging to phospholipids (particularly ether phospholipids, as plasmalogens), as well as diacylglycerols and triacylglycerides. Decreased expression of alkyldihydroxyacetonephosphate synthase (AGPS)-a critical peroxisomal enzyme in plasmalogen synthesis-is found in motor neuron disease models; this occurs in parallel with an increase in the expression of sterol carrier protein 2 (SCP2) mRNA in ALS and Scp2 levels in G93A transgenic mice. Further, we identified diminished expression of diacylglycerol-related enzymes, such as phospholipase C βI (PLCβI) and protein kinase CβII (PKCβII), linked to diacylglycerol metabolism. Finally, lipid droplets were recognized in the nuclei, supporting the identification of triacylglycerides as differential lipids. Our results point to the potentially pathogenic role of altered composition of nuclear membrane lipids and lipids in the nucleoplasm in the anterior horn of the spinal cord in ALS. Overall, these data support the usefulness of subcellular lipidomics applied to neurodegenerative diseases.
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Affiliation(s)
- Omar Ramírez-Nuñez
- Department of Experimental Medicine, School of Medicine, IRBLleida-UdL, Lleida, Spain
| | - Mariona Jové
- Department of Experimental Medicine, School of Medicine, IRBLleida-UdL, Lleida, Spain
| | - Pascual Torres
- Department of Experimental Medicine, School of Medicine, IRBLleida-UdL, Lleida, Spain
| | - Joaquim Sol
- Department of Experimental Medicine, School of Medicine, IRBLleida-UdL, Lleida, Spain.,Institut Català de la Salut, Lleida, Spain.,Research Support Unit Lleida, Fundació Institut Universitari per a la recerca a l'Atenció Primària de Salut Jordi Gol i Gurina (IDIAPJGol), Lleida, Spain
| | - Laia Fontdevila
- Department of Experimental Medicine, School of Medicine, IRBLleida-UdL, Lleida, Spain
| | | | - Pol Andrés-Benito
- Departament of Pathology and Experimental Therapeutics, Hospital Universitari de Bellvitge, IDIBELL, Universitat de Barcelona, Hospitalet de Llobregat, Spain.,CIBERNED (Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas), Instituto Carlos III, Barcelona, Spain
| | - Victòria Ayala
- Department of Experimental Medicine, School of Medicine, IRBLleida-UdL, Lleida, Spain
| | - Chiara Rossi
- Department of Experimental Medicine, School of Medicine, IRBLleida-UdL, Lleida, Spain
| | - Jordi Boada
- Department of Experimental Medicine, School of Medicine, IRBLleida-UdL, Lleida, Spain
| | - Mònica Povedano
- Neurology Service, Hospital Universitari de Bellvitge, Barcelona, Spain
| | - Isidro Ferrer
- Departament of Pathology and Experimental Therapeutics, Hospital Universitari de Bellvitge, IDIBELL, Universitat de Barcelona, Hospitalet de Llobregat, Spain.,CIBERNED (Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas), Instituto Carlos III, Barcelona, Spain
| | - Reinald Pamplona
- Department of Experimental Medicine, School of Medicine, IRBLleida-UdL, Lleida, Spain
| | - Manuel Portero-Otin
- Department of Experimental Medicine, School of Medicine, IRBLleida-UdL, Lleida, Spain
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Pentón-Rol G, Cervantes-Llanos M, Martínez-Sánchez G, Cabrera-Gómez JA, Valenzuela-Silva CM, Ramírez-Nuñez O, Casanova-Orta M, Robinson-Agramonte MA, Lopategui-Cabezas I, López-Saura PA. TNF-alpha and IL-10 downregulation and marked oxidative stress in Neuromyelitis Optica. J Inflamm (Lond) 2009; 6:18. [PMID: 19490629 PMCID: PMC2694781 DOI: 10.1186/1476-9255-6-18] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Accepted: 06/02/2009] [Indexed: 12/29/2022]
Abstract
Background Neuromyelitis optica is a central nervous system demyelinating and inflammatory syndrome. The objective of this study is to identify cytokines related to the cellular immune response as well as blood brain barrier integrity and oxidative stress. Methods We performed a molecular characterization of cellular immune response and oxidative stress in serum from relapsing-NMO (R-NMO) patients and established the correlations between the clinical measurements and molecular parameters using the Bayesian approach. Serum samples from 11 patients with R-NMO diagnosed according to Wingerchuk criteria and matched in terms of age, gender and ethnicity with the healthy controls were analyzed. The levels of TNF-α, IFN-γ, IL-10, MMP-9, TIMP-1 and oxidative stress markers: malondialdehyde, advanced oxidation protein products, peroxidation potential, superoxide dismutase, catalase, and total hydroperoxides were measured. Results We found almost undetectable levels of TNF-α, a decreased production of IL-10 and a significant up-regulation of every oxidative stress biomarker studied. The insufficient production of TNF-α and IL-10 in R-NMO patients, which are two important players of T cell mediated immunoregulation, suggest an effector – regulator imbalance. The overproduction of oxygen reactive species as a consequence of the chronic inflammatory milieu is reflected on the excess of oxidative damage mediators detected. Furthermore, Multidimensional Scaling and a Bayesian linear regression model revealed a significant linear dependence between Expanded Disability Status Scale Kurtzke and TIMP-1; pointing to a possible predictive or prognostic value of this clinical-molecular relationship. Conclusion These results suggest that there is a breakdown in immunoregulatory mechanisms and noteworthy pro-oxidant environment contributing to NMO pathogenesis.
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Affiliation(s)
| | | | - Gregorio Martínez-Sánchez
- Center for Research and Biological Evaluations, Institute of Pharmacy and Food Sciences, University of Havana, Havana, Cuba
| | | | | | - Omar Ramírez-Nuñez
- Center for Research and Biological Evaluations, Institute of Pharmacy and Food Sciences, University of Havana, Havana, Cuba
| | - Mayté Casanova-Orta
- Center for Research and Biological Evaluations, Institute of Pharmacy and Food Sciences, University of Havana, Havana, Cuba
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