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Carulla P, Badia-Villanueva M, Civit S, Carrascal M, Abian J, Ricart-Jané D, Llobera M, Casanovas A, López-Tejero MD. The response to fasting and refeeding reveals functional regulation of lipoprotein lipase proteoforms. Front Physiol 2023; 14:1271149. [PMID: 37916217 PMCID: PMC10617031 DOI: 10.3389/fphys.2023.1271149] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 10/04/2023] [Indexed: 11/03/2023] Open
Abstract
Lipoprotein lipase (LPL) is responsible for the intravascular catabolism of triglyceride-rich lipoproteins and plays a central role in whole-body energy balance and lipid homeostasis. As such, LPL is subject to tissue-specific regulation in different physiological conditions, but the mechanisms of this regulation remain incompletely characterized. Previous work revealed that LPL comprises a set of proteoforms with different isoelectric points, but their regulation and functional significance have not been studied thus far. Here we studied the distribution of LPL proteoforms in different rat tissues and their regulation under physiological conditions. First, analysis by two-dimensional electrophoresis and Western blot showed different patterns of LPL proteoforms (i.e., different pI or relative abundance of LPL proteoforms) in different rat tissues under basal conditions, which could be related to the tissue-specific regulation of the enzyme. Next, the comparison of LPL proteoforms from heart and brown adipose tissue between adults and 15-day-old rat pups, two conditions with minimal regulation of LPL in these tissues, yielded virtually the same tissue-specific patterns of LPL proteoforms. In contrast, the pronounced downregulation of LPL activity observed in white adipose tissue during fasting is accompanied by a prominent reconfiguration of the LPL proteoform pattern. Furthermore, refeeding reverts this downregulation of LPL activity and restores the pattern of LPL proteoforms in this tissue. Importantly, this reversible proteoform-specific regulation during fasting and refeeding indicates that LPL proteoforms are functionally diverse. Further investigation of potential differences in the functional properties of LPL proteoforms showed that all proteoforms exhibit lipolytic activity and have similar heparin-binding affinity, although other functional aspects remain to be investigated. Overall, this study demonstrates the ubiquity, differential distribution and specific regulation of LPL proteoforms in rat tissues and underscores the need to consider the existence of LPL proteoforms for a complete understanding of LPL regulation under physiological conditions.
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Affiliation(s)
- Pere Carulla
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - Míriam Badia-Villanueva
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - Sergi Civit
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - Montserrat Carrascal
- Biological and Environmental Proteomics, Institute of Biomedical Research of Barcelona, Spanish National Research Council, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IIBB-CSIC/IDIBAPS), Barcelona, Spain
| | - Joaquin Abian
- Biological and Environmental Proteomics, Institute of Biomedical Research of Barcelona, Spanish National Research Council, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IIBB-CSIC/IDIBAPS), Barcelona, Spain
| | - David Ricart-Jané
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - Miquel Llobera
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - Albert Casanovas
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - M. Dolores López-Tejero
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
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Matamoros-Angles A, Hervera A, Soriano J, Martí E, Carulla P, Llorens F, Nuvolone M, Aguzzi A, Ferrer I, Gruart A, Delgado-García JM, Del Río JA. Analysis of co-isogenic prion protein deficient mice reveals behavioral deficits, learning impairment, and enhanced hippocampal excitability. BMC Biol 2022; 20:17. [PMID: 35027047 PMCID: PMC8759182 DOI: 10.1186/s12915-021-01203-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 03/25/2021] [Accepted: 12/02/2021] [Indexed: 12/22/2022] Open
Abstract
Background Cellular prion protein (PrPC) is a cell surface GPI-anchored protein, usually known for its role in the pathogenesis of human and animal prionopathies. However, increasing knowledge about the participation of PrPC in prion pathogenesis contrasts with puzzling data regarding its natural physiological role. PrPC is expressed in a number of tissues, including at high levels in the nervous system, especially in neurons and glial cells, and while previous studies have established a neuroprotective role, conflicting evidence for a synaptic function has revealed both reduced and enhanced long-term potentiation, and variable observations on memory, learning, and behavior. Such evidence has been confounded by the absence of an appropriate knock-out mouse model to dissect the biological relevance of PrPC, with some functions recently shown to be misattributed to PrPC due to the presence of genetic artifacts in mouse models. Here we elucidate the role of PrPC in the hippocampal circuitry and its related functions, such as learning and memory, using a recently available strictly co-isogenic Prnp0/0 mouse model (PrnpZH3/ZH3). Results We performed behavioral and operant conditioning tests to evaluate memory and learning capabilities, with results showing decreased motility, impaired operant conditioning learning, and anxiety-related behavior in PrnpZH3/ZH3 animals. We also carried in vivo electrophysiological recordings on CA3-CA1 synapses in living behaving mice and monitored spontaneous neuronal firing and network formation in primary neuronal cultures of PrnpZH3/ZH3 vs wildtype mice. PrPC absence enhanced susceptibility to high-intensity stimulations and kainate-induced seizures. However, long-term potentiation (LTP) was not enhanced in the PrnpZH3/ZH3 hippocampus. In addition, we observed a delay in neuronal maturation and network formation in PrnpZH3/ZH3 cultures. Conclusion Our results demonstrate that PrPC promotes neuronal network formation and connectivity. PrPC mediates synaptic function and protects the synapse from excitotoxic insults. Its deletion may underlie an epileptogenic-susceptible brain that fails to perform highly cognitive-demanding tasks such as associative learning and anxiety-like behaviors. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-021-01203-0.
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Affiliation(s)
- A Matamoros-Angles
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia (IBEC), Parc Científic de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology, and Immunology, University of Barcelona, Barcelona, Spain.,CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Institute of Neuroscience, University of Barcelona, Barcelona, Spain.,Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - A Hervera
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia (IBEC), Parc Científic de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology, and Immunology, University of Barcelona, Barcelona, Spain.,CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - J Soriano
- Departament de Física de la Materia Condensada, University of Barcelona, Barcelona, Spain.,Institute of Complex Systems (UBICS), University of Barcelona, Barcelona, Spain
| | - E Martí
- Department of Biomedicine, University of Barcelona, Barcelona, Spain.,Bioinformatics and Genomics, Center for Genomic Regulation, Barcelona, Spain
| | - P Carulla
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia (IBEC), Parc Científic de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology, and Immunology, University of Barcelona, Barcelona, Spain.,CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain
| | - F Llorens
- CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Department of Neurology, University Medical School, Göttingen, Germany.,Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Catalonia, Spain
| | - M Nuvolone
- Institute of Neuropathology, University Hospital of Zürich, Zürich, Switzerland.,Amyloidosis Center, Foundation IRCCS Policlinico San Matteo, Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - A Aguzzi
- Institute of Neuropathology, University Hospital of Zürich, Zürich, Switzerland
| | - I Ferrer
- CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Institute of Neuroscience, University of Barcelona, Barcelona, Spain.,Senior Consultant, Bellvitge University Hospital, IDIBELL (Bellvitge Biomedical Research Centre), L'Hospitalet de Llobregat, Spain.,Department of Pathology and Experimental Therapeutics, University of Barcelona, Barcelona, Spain
| | - A Gruart
- Division of Neurosciences, Pablo de Olavide University, 41013, Seville, Spain
| | - J M Delgado-García
- Division of Neurosciences, Pablo de Olavide University, 41013, Seville, Spain.
| | - J A Del Río
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia (IBEC), Parc Científic de Barcelona, Barcelona, Spain. .,Department of Cell Biology, Physiology, and Immunology, University of Barcelona, Barcelona, Spain. .,CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain. .,Institute of Neuroscience, University of Barcelona, Barcelona, Spain.
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Fernandes FS, Sardinha FLC, Badia-Villanueva M, Carulla P, Herrera E, Tavares do Carmo MG. Dietary lipids during early pregnancy differently influence adipose tissue metabolism and fatty acid composition in pregnant rats with repercussions on pup's development. Prostaglandins Leukot Essent Fatty Acids 2012; 86:167-74. [PMID: 22444486 DOI: 10.1016/j.plefa.2012.03.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 03/01/2012] [Accepted: 03/02/2012] [Indexed: 01/26/2023]
Abstract
Pregnant rats received soybean (SO), olive (OO), fish (FO) and linseed (LO) oil diets from conception to d12 of gestation (early diets) and standard diet thereafter. At d12 and d20 the lipoprotein lipase (LPL) activity was evaluated in maternal adipose tissues (ATs). Fatty Acid (FA) profile was determined in maternal lumbar AT (LAT), in milk and in pup's plasma and brain. LPL activity was higher in ATs at d12 than d20, all groups presenting hypertriglyceridemia at d20. At d12, the LO diet resulted higher LPL activity and incorporation of 18:3 n-3 into LAT. FA profile in maternal LAT at d20 and colostrum was similar to early diets, reflected also in FA composition of pup's plasma. In FO, brain phospholipids had higher 22:6 n-3 without affecting arachidonic acid. These results suggest that specifics dietary FA in early pregnancy modulates lipid metabolism and the provision of LC-PUFA in milk and pups brain.
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Affiliation(s)
- Flavia S Fernandes
- Instituto de Nutrição Josué de Castro, Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde, Instituto de Nutrição Bloco J-2° andar, Rio de Janeiro 21941-902, Brazil
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