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Costa Silva A, Rodrigues V, Martins-Silva C, Morgado A. Penile fracture surgery – does it impacts sexual function? Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)01293-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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2
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Costa Silva A, Pina-Vaz T, Manso M, Antunes-Lopes T, Pestana M, Rios M, Martins-Silva C, Morgado A, Silva J. Kidney transplantation from donation after brain death versus donation after circulatory death using abdominal normothermic oxygenated circulation: Is there a difference in surgical complications? Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00457-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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3
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Rosseto SM, Alarcon TA, Rocha DMC, Ribeiro FM, Ferguson SSG, Martins-Silva C, Muniz MR, Costa PF, Guimarães DA, Pires RGW. DYNLT1 gene expression is downregulated in whole blood of patients at different Huntington's disease stages. Neurol Sci 2020; 42:1963-1967. [PMID: 32995988 DOI: 10.1007/s10072-020-04772-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 09/25/2020] [Indexed: 11/29/2022]
Abstract
Huntington's disease (HD) is a neurodegenerative disorder caused by a CAG nucleotide expansion, which encodes the amino acid glutamine, in the huntingtin gene. HD is characterized by motor, cognitive, and psychiatric dysfunctions. In a previous study, we showed by qPCR that some genes altered in an HD mouse model were also altered in blood of HD patients. These alterations were mainly with respect to the dynein family. Therefore, this study aimed to investigate whether dynein light chain Tctex type 1 (DYNLT1) is altered in HD patients and if there is a correlation between DYNLT1 gene expression changes and disease progression. We assessed the DYNLT1 gene expression in the blood of 19 HD patients and 20 healthy age-matched controls. Also, in 6 of these patients, we analyzed the DYNLT1 expression at two time points, 3 years apart. The DYNLT1 gene expression in the whole blood of HD patients was significantly downregulated and this difference was widened in later stages. These data suggest that DYNLT1 could emerge as a peripheral prognostic indicator in HD and, also, might be a target for potential intervention in the future.
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Affiliation(s)
- S M Rosseto
- Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, Brazil
| | - T A Alarcon
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, Brazil
| | - D M C Rocha
- Department of Pharmaceutical Sciences, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, 29043-900, Brazil
| | - F M Ribeiro
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - S S G Ferguson
- Department of Cellular and Molecular Medicine, Brain and Mind Research Institute and Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - C Martins-Silva
- Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, Brazil.,Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, Brazil
| | - M R Muniz
- Department of Clinical Medicine, Health Science Center, Federal University of Espírito Santo, Espírito Santo, Brazil
| | - P F Costa
- Department of Physiotherapy, School of Sciences, Santa Casa de Misericordia de Vitoria, Vitória, ES, Brazil
| | - D A Guimarães
- Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, Brazil.,Department of Pharmaceutical Sciences, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, 29043-900, Brazil
| | - Rita G W Pires
- Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, Brazil. .,Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espírito Santo, Vitória, ES, Brazil. .,Department of Physiological Sciences, Health Sciences Center, Federal University of Espirito Santo, Vitória, ES, 29043-910, Brazil.
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Alarcon TA, Areal LB, Herlinger AL, Paiva KK, Cicilini MA, Martins-Silva C, Pires RGW. The cannabinoid agonist WIN-2 affects acquisition but not consolidation of a spatial information in training and retraining processes: Relation with transcriptional regulation of the endocannabinoid system? Behav Brain Res 2020; 377:112231. [PMID: 31526770 DOI: 10.1016/j.bbr.2019.112231] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 09/09/2019] [Accepted: 09/11/2019] [Indexed: 10/26/2022]
Abstract
The endocannabinoid system is capable of modulating multiple physiological brain functions including learning and memory. Moreover, there is evidence that the processes of acquisition and consolidation have distinct biological basis. We used the cannabinoid agonist WIN 55,212-2 (WIN-2) to investigate whether chronic CB1 activation affects acquisition and consolidation differently by evaluating gene expression in the hippocampus (HIP) and prefrontal cortex (PFC). Swiss mice were treated with WIN-2 (2 mg/kg) and submitted to the Morris water maze to evaluate different aspects of memory. We observed short-term memory impairment in acquisition of the spatial task while consolidation remained unchanged. In the PFC, animals that received WIN-2 prior to the task exhibited increased expression of the 2-AG synthesis enzyme diacylglycerol lipase and decreased levels of the degradation enzyme monoacylglycerol lipase, while mice that were treated after the task for the evaluation of consolidation exhibited the opposite profile. With respect to genes related to AEA metabolism, no correlation between the molecular and behavioral data could be established. In this sense, the cognitive impairment in the acquisition promoted by WIN-2 treatment may be related to a possible increase in the concentration of 2-AG in the PFC. Overall, this study confirms the relevance of the endocannabinoid system in the modulation of cognitive processes. A better understanding of the mechanisms underlying endocannabinoids roles in cognition could provide guidance for the development of treatments to reduce the cognitive deficits caused by drug abuse.
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Affiliation(s)
- T A Alarcon
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil; Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil
| | - L B Areal
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil; Graduate Program in Neuroscience, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte-MG, Brazil
| | - A L Herlinger
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil; Department of Genetics, Institute of Biology, Federal University of Rio de Janeiro, Rio de Janeiro-RJ, Brazil
| | - K K Paiva
- Department of Pharmaceutical Sciences, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil
| | - M A Cicilini
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil
| | - C Martins-Silva
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil; Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil; Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil
| | - R G W Pires
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil; Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil; Graduate Program in Neuroscience, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte-MG, Brazil; Department of Physiological Sciences, Health Sciences Center, Federal University of Espírito Santo, Vitoria-ES, Brazil.
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Antunes-Lopes T, Pinto R, Carvalho-Barros S, Diniz P, Duarte-Cruz C, Martins-Silva C, Cruz F. UP-03.200 Brain-Derived Neurotropic Factor: A New Potential Biomarker of Overactive Bladder Syndrome. Urology 2011. [DOI: 10.1016/j.urology.2011.07.1288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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de Castro BM, Pereira GS, Magalhães V, Rossato JI, De Jaeger X, Martins-Silva C, Leles B, Lima P, Gomez MV, Gainetdinov RR, Caron MG, Izquierdo I, Cammarota M, Prado VF, Prado MAM. Reduced expression of the vesicular acetylcholine transporter causes learning deficits in mice. Genes Brain Behav 2008; 8:23-35. [PMID: 18778400 DOI: 10.1111/j.1601-183x.2008.00439.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Storage of acetylcholine in synaptic vesicles plays a key role in maintaining cholinergic function. Here we used mice with a targeted mutation in the vesicular acetylcholine transporter (VAChT) gene that reduces transporter expression by 40% to investigate cognitive processing under conditions of VAChT deficiency. Motor skill learning in the rotarod revealed that VAChT mutant mice were slower to learn this task, but once they reached maximum performance they were indistinguishable from wild-type mice. Interestingly, motor skill performance maintenance after 10 days was unaffected in these mutant mice. We also tested whether reduced VAChT levels affected learning in an object recognition memory task. We found that VAChT mutant mice presented a deficit in memory encoding necessary for the temporal order version of the object recognition memory, but showed no alteration in spatial working memory, or spatial memory in general when tested in the Morris water maze test. The memory deficit in object recognition memory observed in VAChT mutant mice could be reversed by cholinesterase inhibitors, suggesting that learning deficits caused by reduced VAChT expression can be ameliorated by restoring ACh levels in the synapse. These data indicate an important role for cholinergic tone in motor learning and object recognition memory.
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Affiliation(s)
- B M de Castro
- Program in Molecular Pharmacology, ICB and Núcleo de Neurociências, Departamento de Fisiologia e Biofísica, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
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Ribeiro FM, Alves-Silva J, Volknandt W, Martins-Silva C, Mahmud H, Wilhelm A, Gomez MV, Rylett RJ, Ferguson SSG, Prado VF, Prado MAM. The hemicholinium-3 sensitive high affinity choline transporter is internalized by clathrin-mediated endocytosis and is present in endosomes and synaptic vesicles. J Neurochem 2003; 87:136-46. [PMID: 12969261 DOI: 10.1046/j.1471-4159.2003.01974.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Synthesis of acetylcholine depends on the plasma membrane uptake of choline by a high affinity choline transporter (CHT1). Choline uptake is regulated by nerve impulses and trafficking of an intracellular pool of CHT1 to the plasma membrane may be important for this regulation. We have generated a hemagglutinin (HA) epitope tagged CHT1 to investigate the organelles involved with intracellular trafficking of this protein. Expression of CHT1-HA in HEK 293 cells establishes Na+-dependent, hemicholinium-3 sensitive high-affinity choline transport activity. Confocal microscopy reveals that CHT1-HA is found predominantly in intracellular organelles in three different cell lines. Importantly, CHT1-HA seems to be continuously cycling between the plasma membrane and endocytic organelles via a constitutive clathrin-mediated endocytic pathway. In a neuronal cell line, CHT1-HA colocalizes with the early endocytic marker green fluorescent protein (GFP)-Rab 5 and with two markers of synaptic-like vesicles, VAMP-myc and GFP-VAChT, suggesting that in cultured cells CHT1 is present mainly in organelles of endocytic origin. Subcellular fractionation and immunoisolation of organelles from rat brain indicate that CHT1 is present in synaptic vesicles. We propose that intracellular CHT1 can be recruited during stimulation to increase choline uptake in nerve terminals.
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Affiliation(s)
- F M Ribeiro
- Laboratório de Neurobiologia Molecular, Departamento de Bioquímica-Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Barbosa J, Ferreira LT, Martins-Silva C, Santos MS, Torres GE, Caron MG, Gomez MV, Ferguson SSG, Prado MAM, Prado VF. Trafficking of the vesicular acetylcholine transporter in SN56 cells: a dynamin-sensitive step and interaction with the AP-2 adaptor complex. J Neurochem 2002; 82:1221-8. [PMID: 12358769 DOI: 10.1046/j.1471-4159.2002.01068.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The pathways by which synaptic vesicle proteins reach their destination are not completely defined. Here we investigated the traffic of a green fluorescent protein (GFP)-tagged version of the vesicular acetylcholine transporter (VAChT) in cholinergic SN56 cells, a model system for neuronal processing of this cargo. GFP-VAChT accumulates in small vesicular compartments in varicosities, but perturbation of endocytosis with a dominant negative mutant of dynamin I-K44A impaired GFP-VAChT trafficking to these processes. The protein in this condition accumulated in the cell body plasma membrane and in large vesicular patches therein. A VAChT endocytic mutant (L485A/L486A) was also located at the plasma membrane, however, the protein was not sorted to dynamin I-K44A generated vesicles. A fusion protein containing the VAChT C-terminal tail precipitated the AP-2 adaptor protein complex from rat brain, suggesting that VAChT directly interacts with the endocytic complex. In addition, yeast two hybrid experiments indicated that the C-terminal tail of VAChT interacts with the micro subunit of AP-2 in a di-leucine (L485A/L486A) dependent fashion. These observations suggest that the di-leucine motif regulates sorting of VAChT from the soma plasma membrane through a clathrin dependent mechanism prior to the targeting of the transporter to varicosities.
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Affiliation(s)
- José Barbosa
- Laboratório de Neurofarmacologia, Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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