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Mora-Zenil J, Morán J. ROS produced by NOX promote the neurite growth in a PI3K/Akt independent manner. J Neurosci Res 2024; 102:e25259. [PMID: 37840360 DOI: 10.1002/jnr.25259] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 05/17/2023] [Accepted: 09/28/2023] [Indexed: 10/17/2023]
Abstract
Reactive oxygen species (ROS) function as signaling molecules in several physiologic and pathologic processes. In central nervous system, ROS are critical for differentiation, migration, polarization, and neurite growth. These actions are mediated by reversible oxidation of target proteins. On the other hand, PI3K/Akt signaling pathway is susceptible to be modulated by ROS and it has been implicated in neurite growth. In this study, we evaluated the participation of ROS in the neurite growth of cultured rat cerebellar granule neurons (CGN), as well as the possible regulation of the PI3K/Akt pathway by ROS during neurite outgrowth. For this purpose, CGN were treated with cellular or mitochondrial antioxidants, or an NOX inhibitor and neurite growth was evaluated. Moreover, to assess the participation Akt in this process, the p-Akt levels were measured in CGN treated with antioxidants or a NOX inhibitor. The effect of antioxidants on the neurite growth in the presence of a PI3K inhibitor was also measured. We found that cellular antioxidants and the NOX inhibitor decreased the neurite growth, but not the mitochondrial antioxidant. Interestingly, the antioxidants increased the p-Akt levels; however, the effect of antioxidants on neurite growth was no dependent on the Akt activity since the inhibitor of PI3K did not modify the antioxidant action on neurite growth. Our results show that the PI3K/Akt pathway participates in neurite growth and that ROS produced by NOX could function as signals in this process; however, this action is not mediated by a redox regulation of Akt activity.
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Affiliation(s)
- Janeth Mora-Zenil
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
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2
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Medina-Ruíz GI, Medina-Ruiz AI, Morán J. Fraping: A computational tool for detecting slight differences in fluorescence recovery after photobleaching (FRAP) data for actin polymerization analysis. Microsc Res Tech 2024. [PMID: 38425281 DOI: 10.1002/jemt.24533] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 02/13/2024] [Accepted: 02/14/2024] [Indexed: 03/02/2024]
Abstract
Fluorescence recovery after photobleaching (FRAP) is a laser method of light microscopy to evaluate the rapid movement of fluorescent molecules. To have a more reliable approach to analyze data from FRAP, we designed Fraping, a free access R library to data analysis obtained from FRAP. Unlike other programs, Fraping has a new form of analyzing curves of FRAP using statistical analysis based on the average curve difference. To evaluate our library, we analyzed the differences of actin polymerization in real time between dendrites and secondary neurites of cultured neuron transfected with LifeAct to track F-actin changes of neurites. We found that Fraping provided greater sensitivity than the conventional model using mobile fraction analysis. Likewise, this approach allowed us to normalize the fluorescence to the size area of interest and adjust data curves choosing the best parametric model. In addition, this library was supplemented with data simulation to have a more significant enrichment for the analysis behavior. We concluded that Fraping is a method that reduces bias when analyzing two data groups as compared with the conventional methods. This method also allows the users to choose a more suitable analysis approach according to their requirements. RESEARCH HIGHLIGHTS: Fraping is a new programming tool to analyze FRAP data to normalize fluorescence recovery curves. The conventional method uses one-point analysis, and the new one compares all the points to define the similarity of the fluorescence recovery.
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Affiliation(s)
- Gabriela Itzetl Medina-Ruíz
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
- Posgrado en Ciencias Biológicas, Unidad de Posgrado, Ciudad Universitaria, Mexico City, Mexico
| | | | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
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Sánchez-Torres S, Orozco-Barrios C, Salgado-Ceballos H, Segura-Uribe JJ, Guerra-Araiza C, León-Cholula Á, Morán J, Coyoy-Salgado A. Tibolone Improves Locomotor Function in a Rat Model of Spinal Cord Injury by Modulating Apoptosis and Autophagy. Int J Mol Sci 2023; 24:15285. [PMID: 37894971 PMCID: PMC10607734 DOI: 10.3390/ijms242015285] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 10/10/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
Spinal cord injury (SCI) harms patients' health and social and economic well-being. Unfortunately, fully effective therapeutic strategies have yet to be developed to treat this disease, affecting millions worldwide. Apoptosis and autophagy are critical cell death signaling pathways after SCI that should be targeted for early therapeutic interventions to mitigate their adverse effects and promote functional recovery. Tibolone (TIB) is a selective tissue estrogen activity regulator (STEAR) with neuroprotective properties demonstrated in some experimental models. This study aimed to investigate the effect of TIB on apoptotic cell death and autophagy after SCI and verify whether TIB promotes motor function recovery. A moderate contusion SCI was produced at thoracic level 9 (T9) in male Sprague Dawley rats. Subsequently, animals received a daily dose of TIB orally and were sacrificed at 1, 3, 14 or 30 days post-injury. Tissue samples were collected for morphometric and immunofluorescence analysis to identify tissue damage and the percentage of neurons at the injury site. Autophagic (Beclin-1, LC3-I/LC3-II, p62) and apoptotic (Caspase 3) markers were also analyzed via Western blot. Finally, motor function was assessed using the BBB scale. TIB administration significantly increased the amount of preserved tissue (p < 0.05), improved the recovery of motor function (p < 0.001) and modulated the expression of autophagy markers in a time-dependent manner while consistently inhibiting apoptosis (p < 0.05). Therefore, TIB could be a therapeutic alternative for the recovery of motor function after SCI.
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Affiliation(s)
- Stephanie Sánchez-Torres
- Unidad de Investigación Médica en Enfermedades Neurológicas, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City 06720, Mexico; (S.S.-T.); (H.S.-C.); (Á.L.-C.)
- Consejo Nacional de Ciencia y Tecnología, Mexico City 03940, Mexico
| | - Carlos Orozco-Barrios
- CONACyT-Unidad de Investigación Médica en Enfermedades Neurológicas, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City 06720, Mexico;
| | - Hermelinda Salgado-Ceballos
- Unidad de Investigación Médica en Enfermedades Neurológicas, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City 06720, Mexico; (S.S.-T.); (H.S.-C.); (Á.L.-C.)
| | - Julia J. Segura-Uribe
- Subdirección de Gestión de la Investigación, Hospital Infantil de México Federico Gómez, Secretaría de Salud, Mexico City 04530, Mexico;
| | - Christian Guerra-Araiza
- Unidad de Investigación Médica en Farmacología, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City 06720, Mexico;
| | - Ángel León-Cholula
- Unidad de Investigación Médica en Enfermedades Neurológicas, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City 06720, Mexico; (S.S.-T.); (H.S.-C.); (Á.L.-C.)
| | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico;
| | - Angélica Coyoy-Salgado
- CONACyT-Unidad de Investigación Médica en Enfermedades Neurológicas, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City 06720, Mexico;
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García-Hernández B, Morán J. Corrigendum: Txnip expression promotes JNK-mediated neuronal death in response to reactive oxygen species. Front Mol Neurosci 2023; 16:1275888. [PMID: 37771555 PMCID: PMC10523379 DOI: 10.3389/fnmol.2023.1275888] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 08/31/2023] [Indexed: 09/30/2023] Open
Abstract
[This corrects the article DOI: 10.3389/fnmol.2023.1210962.].
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Affiliation(s)
| | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
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García-Hernández B, Morán J. Txnip expression promotes JNK-mediated neuronal death in response to reactive oxygen species. Front Mol Neurosci 2023; 16:1210962. [PMID: 37547922 PMCID: PMC10397383 DOI: 10.3389/fnmol.2023.1210962] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 07/06/2023] [Indexed: 08/08/2023] Open
Abstract
TXNIP is a protein sensitive to oxidant conditions whose expression is related to the progression of death in cancer, diabetes, ischemia, and neurodegenerative diseases, among others. Because of this, many studies propose TXNIP as a therapeutic target in several diseases. Exposure of cerebellar granule neurons to staurosporine or low potassium leads to apoptotic death. Both conditions generate an early production of reactive oxygen species (ROS) that induces the activation of the ASK1 pathway and the apoptotic machinery. In these models, it has been shown an increase in TXNIP protein mediated by ROS. Here, we evaluated the molecular mechanisms involved in the regulation of the Txnip expression during neuronal death, as well as the role of the protein in the progression of cell death induced by these two apoptotic conditions. In cultured cerebellar granule neurons, we observed that low potassium and staurosporine induced an early increase in ROS that correlated with an increase in Txnip mRNA. When we evaluated the promoter of the gene, we found that the JASPAR-reported FOXO1/3 transcription factor motifs are close to the transcription start site (TSS). We then verified through the Chromatin immunoprecipitation technique (ChIP) that FOXO3 interacts with the Txnip promoter after 1 h of low potassium treatment. We also detected FOXO3 nuclear translocation by low potassium and staurosporine treatments. Finally, by using shRNA in the neuroblastoma MSN cell line, we found that Txnip downregulation decreased neuronal death induced by staurosporine stimulus. Together, these results suggest that ROS promotes the expression of Txnip through the activation of the FOXO3 transcription factor mediated by Akt inhibition. We also demonstrated that TXNIP is necessary for neuronal death progression.
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Affiliation(s)
| | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
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Morales-Rosales SL, Santín-Márquez R, Posadas-Rodriguez P, Rincon-Heredia R, Montiel T, Librado-Osorio R, Luna-López A, Rivero-Segura NA, Torres C, Cano-Martínez A, Silva-Palacios A, Cortés-Hernández P, Morán J, Massieu L, Konigsberg M. Senescence in Primary Rat Astrocytes Induces Loss of the Mitochondrial Membrane Potential and Alters Mitochondrial Dynamics in Cortical Neurons. Front Aging Neurosci 2021; 13:766306. [PMID: 34924995 PMCID: PMC8672143 DOI: 10.3389/fnagi.2021.766306] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 10/27/2021] [Indexed: 01/10/2023] Open
Abstract
The decline in brain function during aging is one of the most critical health problems nowadays. Although senescent astrocytes have been found in old-age brains and neurodegenerative diseases, their impact on the function of other cerebral cell types is unknown. The aim of this study was to evaluate the effect of senescent astrocytes on the mitochondrial function of a neuron. In order to evaluate neuronal susceptibility to a long and constant senescence-associated secretory phenotype (SASP) exposure, we developed a model by using cellular cocultures in transwell plates. Rat primary cortical astrocytes were seeded in transwell inserts and induced to premature senescence with hydrogen peroxide [stress-induced premature senescence (SIPS)]. Independently, primary rat cortical neurons were seeded at the bottom of transwells. After neuronal 6 days in vitro (DIV), the inserts with SIPS-astrocytes were placed in the chamber and cocultured with neurons for 6 more days. The neuronal viability, the redox state [reduced glutathione/oxidized glutathione (GSH/GSSG)], the mitochondrial morphology, and the proteins and membrane potential were determined. Our results showed that the neuronal mitochondria functionality was altered after being cocultured with senescent astrocytes. In vivo, we found that old animals had diminished mitochondrial oxidative phosphorylation (OXPHOS) proteins, redox state, and senescence markers as compared to young rats, suggesting effects of the senescent astrocytes similar to the ones we observed in vitro. Overall, these results indicate that the microenvironment generated by senescent astrocytes can affect neuronal mitochondria and physiology.
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Affiliation(s)
- Sandra Lizbeth Morales-Rosales
- Posgrado Biología Experimental, Universidad Autónoma Metropolitana, Mexico City, Mexico.,Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana, Mexico City, Mexico
| | - Roberto Santín-Márquez
- Posgrado Biología Experimental, Universidad Autónoma Metropolitana, Mexico City, Mexico.,Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana, Mexico City, Mexico
| | - Pedro Posadas-Rodriguez
- Posgrado Biología Experimental, Universidad Autónoma Metropolitana, Mexico City, Mexico.,Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana, Mexico City, Mexico
| | - Ruth Rincon-Heredia
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Teresa Montiel
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Raúl Librado-Osorio
- Departamento de Investigación Básica, Instituto Nacional de Geriatría, Mexico City, Mexico
| | - Armando Luna-López
- Departamento de Investigación Básica, Instituto Nacional de Geriatría, Mexico City, Mexico
| | | | - Claudio Torres
- Department of Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, PA, United States
| | - Agustina Cano-Martínez
- Departamento de Fisiología, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Alejandro Silva-Palacios
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Paulina Cortés-Hernández
- Instituto Mexicano del Seguro Social, Centro de Investigación Biomédica de Oriente, Atlixco, Mexico
| | - Julio Morán
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Lourdes Massieu
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Mina Konigsberg
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana, Mexico City, Mexico
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Morán J, Yon J, Poux A, Corbin F, Ouf FX, Siméon A. Monte Carlo Aggregation Code (MCAC) Part 2: Application to soot agglomeration, highlighting the importance of primary particles. J Colloid Interface Sci 2020; 575:274-285. [PMID: 32380319 DOI: 10.1016/j.jcis.2020.04.085] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 02/18/2020] [Revised: 04/19/2020] [Accepted: 04/20/2020] [Indexed: 11/26/2022]
Abstract
During the agglomeration of nanoparticles and in particular, soot, a change in both the flow regime (from free molecular to near continuum) as well as the change of agglomeration regime (from ballistic to diffusive) is expected. However, these effects are rarely taken into account in numerical simulations of particle agglomeration and yet, they are suspected to have an important impact on the agglomeration kinetics, particle morphologies, and size distributions. This work intends to study these properties by using the Monte Carlo Aggregation Code (MCAC) presented in the preceding work (part 1), focusing on the physical impacts of varying the particle volume fraction and monomers size and polydispersity. The results show an important sensitivity of the kinetics of agglomeration, coagulation homogeneity, and agglomerate morphology to the size of monomers. First, for smaller monomer diameters, the agglomeration kinetic is enhanced and agglomerates are characterized by larger fractal dimensions. Second, for large monomer diameters, fractal dimensions down to 1.67 can be found being smaller than the classical 1.78 for Diffusion Limited Cluster Agglomeration (DLCA) mechanism. One important conclusion is that variation in time of both regimes has to be considered for a more accurate simulation of the agglomerate size distribution and morphology.
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Affiliation(s)
- J Morán
- Normandie Université, INSA Rouen, UNIROUEN, CNRS, CORIA, 76000 Rouen, France
| | - J Yon
- Normandie Université, INSA Rouen, UNIROUEN, CNRS, CORIA, 76000 Rouen, France.
| | - A Poux
- Normandie Université, INSA Rouen, UNIROUEN, CNRS, CORIA, 76000 Rouen, France
| | - F Corbin
- Normandie Université, INSA Rouen, UNIROUEN, CNRS, CORIA, 76000 Rouen, France
| | - F-X Ouf
- Institut de Radioprotection et de Sûreté Nucéaire (IRSN), PSN-RES, SCA, Gif-Sur-Yvette 91192, France
| | - A Siméon
- Université de Lille, CNRS, UMR 8518 - LOA - Laboratoire d'Optique Atmosphérique, 59000 Lille, France
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Altamirano-Bustamante NF, Garrido-Magaña E, Morán E, Calderón A, Pasten-Hidalgo K, Castillo-Rodríguez RA, Rojas G, Lara-Martínez R, Leyva-García E, Larralde-Laborde M, Domíguez G, Murata C, Margarita-Vazquez Y, Payro R, Barbosa M, Valderrama A, Montesinos H, Domínguez-Camacho A, García-Olmos VH, Ferrer R, Medina-Bravo PG, Santoscoy F, Revilla-Monsalve C, Jiménez-García LF, Morán J, Villalobos-Alva J, Villalobos MJ, Calzada-León R, Altamirano P, Altamirano-Bustamante MM. Protein-conformational diseases in childhood: Naturally-occurring hIAPP amyloid-oligomers and early β-cell damage in obesity and diabetes. PLoS One 2020; 15:e0237667. [PMID: 32833960 PMCID: PMC7446879 DOI: 10.1371/journal.pone.0237667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 07/30/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND AIMS This is the first time that obesity and diabetes mellitus (DM) as protein conformational diseases (PCD) are reported in children and they are typically diagnosed too late, when β-cell damage is evident. Here we wanted to investigate the level of naturally-ocurring or real (not synthetic) oligomeric aggregates of the human islet amyloid polypeptide (hIAPP) that we called RIAO in sera of pediatric patients with obesity and diabetes. We aimed to reduce the gap between basic biomedical research, clinical practice-health decision making and to explore whether RIAO work as a potential biomarker of early β-cell damage. MATERIALS AND METHODS We performed a multicentric collaborative, cross-sectional, analytical, ambispective and blinded study; the RIAO from pretreated samples (PTS) of sera of 146 pediatric patients with obesity or DM and 16 healthy children, were isolated, measured by sound indirect ELISA with novel anti-hIAPP cytotoxic oligomers polyclonal antibody (MEX1). We carried out morphological and functional studied and cluster-clinical data driven analysis. RESULTS We demonstrated by western blot, Transmission Electron Microscopy and cell viability experiments that RIAO circulate in the blood and can be measured by ELISA; are elevated in serum of childhood obesity and diabetes; are neurotoxics and works as biomarkers of early β-cell failure. We explored the range of evidence-based medicine clusters that included the RIAO level, which allowed us to classify and stratify the obesity patients with high cardiometabolic risk. CONCLUSIONS RIAO level increases as the number of complications rises; RIAOs > 3.35 μg/ml is a predictor of changes in the current indicators of β-cell damage. We proposed a novel physio-pathological pathway and shows that PCD affect not only elderly patients but also children. Here we reduced the gap between basic biomedical research, clinical practice and health decision making.
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MESH Headings
- Adolescent
- Animals
- Cell Line
- Cell Survival
- Cells, Cultured
- Child
- Child, Preschool
- Cross-Sectional Studies
- Diabetes Mellitus, Type 1/blood
- Diabetes Mellitus, Type 1/pathology
- Diabetes Mellitus, Type 2/blood
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/pathology
- Humans
- Insulin-Secreting Cells/pathology
- Islet Amyloid Polypeptide/blood
- Islet Amyloid Polypeptide/metabolism
- Islet Amyloid Polypeptide/toxicity
- Islet Amyloid Polypeptide/ultrastructure
- Microscopy, Electron, Transmission
- Neurons/drug effects
- Obesity/blood
- Obesity/complications
- Obesity/pathology
- Pilot Projects
- Primary Cell Culture
- Protein Multimerization
- Protein Structure, Quaternary
- Rats
- Toxicity Tests, Acute
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Affiliation(s)
| | - Eulalia Garrido-Magaña
- UMAE Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Eugenia Morán
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Aurora Calderón
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Karina Pasten-Hidalgo
- Instituto Nacional de Pediatría, Mexico City, Mexico
- Cátedras Conacyt, Consejo Nacional de Ciencia y Tecnología, Mexico City, Mexico
| | - Rosa Angélica Castillo-Rodríguez
- Instituto Nacional de Pediatría, Mexico City, Mexico
- Cátedras Conacyt, Consejo Nacional de Ciencia y Tecnología, Mexico City, Mexico
| | - Gerardo Rojas
- UMAE Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | - Edgar Leyva-García
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Mateo Larralde-Laborde
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | | | | | - Rafael Payro
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Manuel Barbosa
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | | | | | | | - Regina Ferrer
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | - Fernanda Santoscoy
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Cristina Revilla-Monsalve
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | - Julio Morán
- Instituto de Fisiología Celular, UNAM, Mexico City, Mexico
| | - Jalil Villalobos-Alva
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Mario Javier Villalobos
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | | | - Perla Altamirano
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Myriam M. Altamirano-Bustamante
- Unidad de Investigación en Enfermedades Metabólicas, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
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Benítez-Rangel E, Olguín-Albuerne M, López-Méndez MC, Domínguez-Macouzet G, Guerrero-Hernández A, Morán J. Caspase-3 Activation Correlates With the Initial Mitochondrial Membrane Depolarization in Neonatal Cerebellar Granule Neurons. Front Cell Dev Biol 2020; 8:544. [PMID: 32714930 PMCID: PMC7343937 DOI: 10.3389/fcell.2020.00544] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 06/09/2020] [Indexed: 12/31/2022] Open
Abstract
In this study we evaluated the effect of the reduction in the endoplasmic reticulum calcium concentration ([Ca2+]ER), changes in the cytoplasmic calcium concentration ([Ca2+]i), alteration of the mitochondrial membrane potential, and the ER stress in the activation of caspase-3 in neonatal cerebellar granule cells (CGN). The cells were loaded with Fura-2 to detect changes in the [Ca2+]i and with Mag-fluo-4 to measure variations in the [Ca2+]ER or with TMRE to follow modifications in the mitochondrial membrane potential in response to five different inducers of CGN cell death. These inducers were staurosporine, thapsigargin, tunicamycin, nifedipine and plasma membrane repolarization by switching culture medium from 25 mM KCl (K25) to 5 mM KCl (K5). Additionally, different markers of ER stress were determined and all these parameters were correlated with the activation of caspase-3. The different inducers of cell death in CGN resulted in three different levels of activation of caspase-3. The highest caspase-3 activity occurred in response to K5. At the same time, staurosporine, nifedipine, and tunicamycin elicited an intermediate activation of caspase-3. Importantly, thapsigargin did not activate caspase-3 at any time. Both K5 and nifedipine rapidly decreased the [Ca2+]i, but only K5 immediately reduced the [Ca2+]ER and the mitochondrial membrane potential. Staurosporine and tunicamycin increased the [Ca2+]i and they decreased both the [Ca2+]ER and mitochondrial membrane potential, but at a much lower rate than K5. Thapsigargin strongly increased the [Ca2+]i, but it took 10 min to observe any decrease in the mitochondrial membrane potential. Three cell death inducers -K5, staurosporine, and thapsigargin- elicited ER stress, but they took 30 min to have any effect. Thapsigargin, as expected, displayed the highest efficacy activating PERK. Moreover, a specific PERK inhibitor did not have any impact on cell death triggered by these cell death inducers. Our data suggest that voltage-gated Ca2+ channels, that are not dihydropyridine-sensitive, load the ER with Ca2+ and this Ca2+ flux plays a critical role in keeping the mitochondrial membrane potential polarized. A rapid decrease in the [Ca2+]ER resulted in rapid mitochondrial membrane depolarization and strong activation of caspase-3 without the intervention of the ER stress in CGN.
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Affiliation(s)
- Edaena Benítez-Rangel
- Departamento de Bioquímica, CINVESTAV-IPN, Mexico City, Mexico.,División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Mauricio Olguín-Albuerne
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | | | - Guadalupe Domínguez-Macouzet
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | | | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
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Morán J, Yon J, Poux A. Monte Carlo Aggregation Code (MCAC) Part 1: Fundamentals. J Colloid Interface Sci 2020; 569:184-194. [PMID: 32109672 DOI: 10.1016/j.jcis.2020.02.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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: 12/27/2019] [Revised: 02/11/2020] [Accepted: 02/11/2020] [Indexed: 11/16/2022]
Abstract
The application of Monte Carlo methods to simulate the agglomeration of suspended nanoparticles is currently limited to specific agglomeration regimes with reduced accuracy in terms of the particle's physical residence time. The definition of specific particles persistent distance, its corresponding time step and subsequent probabilities for particle displacements may improve the accuracy of this method. To solve these issues, a new persistent distance and its corresponding time step based on Langevin dynamics simulations are introduced. Additionally, a probability of particle displacements, not restricted to a specific agglomeration regime, is introduced. All the modifications are validated by comparison with Langevin dynamics simulations. Finally, the above mentioned modifications considerably improve the accuracy of Monte Carlo methods to predict the dynamics and agglomeration of suspended nanoparticles.
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Affiliation(s)
- J Morán
- Normandie Université, INSA Rouen, UNIROUEN, CNRS, CORIA, 76000 Rouen, France
| | - J Yon
- Normandie Université, INSA Rouen, UNIROUEN, CNRS, CORIA, 76000 Rouen, France.
| | - A Poux
- Normandie Université, INSA Rouen, UNIROUEN, CNRS, CORIA, 76000 Rouen, France
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11
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Rando-Matos Y, Pons-Vigués M, Rodriguez-Blanco T, Ripoll J, Llobera J, Morán J, Ballvé-Moreno JL, Violán C, Bolíbar B. Effect of comprehensive smoke-free legislation on asthma and coronary disease trends in Spanish primary care patients. Eur J Public Health 2019; 28:553-559. [PMID: 29401282 DOI: 10.1093/eurpub/cky010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background To examine the impact of comprehensive smoke-free legislation (SFL) (Law 42/2010) on the incidence and prevalence of adult asthma and coronary disease in primary health care (PHC) patients from three Spanish regions, overall and stratified by sex. Methods Longitudinal observational study conducted between 2007 and 2013 in the population over 15 years of age assigned to 66 PHC teams in Catalonia, Navarre and the Balearic Islands. Crude rates and age-standardized (truncated: asthma ≥ 16 years and coronary disease ≥ 35 years) incidence and prevalence rates using the direct method based on the European Standard Population were estimated based on data from PHC electronic health records. Joinpoint analysis was used to analyse the trends of age-standardized incidence and prevalence rates. Trends were expressed as annual percentage change and average annual percent change (AAPC). Results The standardized asthma incidence rate showed a non-significant downward trend and the standardized prevalence rates rose significantly in the three regions. Standardized coronary disease incidence and prevalence rates were considerably higher for men than for women in all regions. The standardized coronary disease incidence rates in Catalonia (AAPC: -8.00%, 95% CI: -10.46; -5.47) and Navarre (AAPC: -3.66%, 95% CI: -4.95;-2.35) showed a significant downward trend from 2007 to 2013, overall and by sex. The standardized coronary disease prevalence trend rate increased significantly in the whole period in Catalonia and the Balearic Islands, although a non-significant downward trend was observed from 2010 in Catalonia. Conclusion No changes in the trends of adult asthma and coronary disease in PHC Spanish patients were detected after the introduction of comprehensive SFL.
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Affiliation(s)
- Yolanda Rando-Matos
- Centre d'Atenció Primària (CAP) Florida Nord. Gerència d'Àmbit d'Atenció Primària Metropolitana Sud, Institut Català de la Salut (ICS), Hospitalet de Llobregat, Barcelona, Spain.,Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Barcelona, Spain
| | - Mariona Pons-Vigués
- Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Barcelona, Spain.,Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain.,Universitat de Girona, Girona, Spain
| | - Teresa Rodriguez-Blanco
- Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Barcelona, Spain.,Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain
| | - Joana Ripoll
- Primary Care Research Unit of Mallorca, Baleares Health Services-Ibsalut, Palma, Spain.,Instituto de Investigación Sanitaria les Illes Balears (IdSBA), Hospital Universitario Son Espases, Palma, Spain
| | - Joan Llobera
- Primary Care Research Unit of Mallorca, Baleares Health Services-Ibsalut, Palma, Spain.,Instituto de Investigación Sanitaria les Illes Balears (IdSBA), Hospital Universitario Son Espases, Palma, Spain
| | - Julio Morán
- Consultorio de Barásoain (Equipo de Atención Primaria de Tafalla), Servicio Navarro de Salud, Navarra, Spain
| | - Josep Lluís Ballvé-Moreno
- Centre d'Atenció Primària (CAP) Florida Nord. Gerència d'Àmbit d'Atenció Primària Metropolitana Sud, Institut Català de la Salut (ICS), Hospitalet de Llobregat, Barcelona, Spain.,Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Barcelona, Spain
| | - Concepció Violán
- Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Barcelona, Spain.,Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain
| | - Bonaventura Bolíbar
- Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Barcelona, Spain.,Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain
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Pons-Vigués M, Rando-Matos Y, Rodriguez-Blanco T, Ballvé-Moreno JL, Ripoll J, Llobera J, Morán J, López-Jiménez T, Violán-Fors C, Bolibar B. Effect of the comprehensive smoke-free law on time trends in smoking behaviour in primary healthcare patients in Spain: a longitudinal observational study. BMJ Open 2019; 9:e020120. [PMID: 30833307 PMCID: PMC6443085 DOI: 10.1136/bmjopen-2017-020120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
OBJECTIVE This study aimed to analyse the impact of comprehensive smoke-free legislation (SFL) on the prevalence and incidence of adult smoking in primary healthcare (PHC) patients from three Spanish regions, overall and stratified by sex. DESIGN Longitudinal observational study conducted between 2008 and 2013. SETTING 66 PHC teams in Catalonia, Navarre and the Balearic Islands (Spain). PARTICIPANTS Population over 15 years of age assigned to PHC teams. PRIMARY AND SECONDARY OUTCOMES MEASURES Quarterly age-standardised prevalence of non-smoker, smoker and ex-smoker and incidence of new smoker, new ex-smoker and ex-smoker relapse rates were estimated with data retrieved from PHC electronic health records. Joinpoint analysis was used to analyse the trends of age-standardised prevalence and incidence rates. Trends were expressed as annual percentage change and average annual percent change. RESULTS The overall standardised smoker prevalence rate showed a significant downward trend (higher in men than women) and the overall standardised ex-smoker prevalence rate showed a significant increased trend (higher in women than men) in the three regions. Standardised smoker and ex-smoker prevalence rates were higher for men than women in all regions. With regard to overall trends of incidence rates, new smokers decreased significantly in Catalonia and Navarre and similarly in men and women, new ex-smokers decreased significantly and more in men in Catalonia and the Balearic Islands, and ex-smoker relapse increased in Catalonia (particularly in women) and decreased in Navarre. CONCLUSIONS Trends in smoking behaviour in PHC patients remain unchanged after the implementation of comprehensive SFL. The impact of the comprehensive SFL might have been lessened by the effect of the preceding partial SFL.
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Affiliation(s)
- Mariona Pons-Vigués
- Fundació Institut Universitari per a la recerca a l’Atenció Primària de Salut Jordi Gol i Gurina (IDIAPJGol), Barcelona, Spain
- Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain
- Departament d’Infermeria, Universitat de Girona, Girona, Spain
| | - Yolanda Rando-Matos
- Fundació Institut Universitari per a la recerca a l’Atenció Primària de Salut Jordi Gol i Gurina (IDIAPJGol), Barcelona, Spain
- Centre d’Atenció Primària (CAP) Florida Nord, Institut Català de la Salut (ICS), Hospitalet de Llobregat, Barcelona, Spain
| | - Teresa Rodriguez-Blanco
- Fundació Institut Universitari per a la recerca a l’Atenció Primària de Salut Jordi Gol i Gurina (IDIAPJGol), Barcelona, Spain
- Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain
| | - Josep Lluís Ballvé-Moreno
- Fundació Institut Universitari per a la recerca a l’Atenció Primària de Salut Jordi Gol i Gurina (IDIAPJGol), Barcelona, Spain
- Centre d’Atenció Primària (CAP) Florida Nord, Institut Català de la Salut (ICS), Hospitalet de Llobregat, Barcelona, Spain
| | - Joana Ripoll
- Primary Care Research Unit of Mallorca, Baleares Health services-IbSalut, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Joan Llobera
- Primary Care Research Unit of Mallorca, Baleares Health services-IbSalut, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Julio Morán
- Equipo de Atención Primaria de Tafalla, Servicio Navarro de Salud, Barasoain, Spain
| | - Tomàs López-Jiménez
- Fundació Institut Universitari per a la recerca a l’Atenció Primària de Salut Jordi Gol i Gurina (IDIAPJGol), Barcelona, Spain
- Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain
| | - Concepción Violán-Fors
- Fundació Institut Universitari per a la recerca a l’Atenció Primària de Salut Jordi Gol i Gurina (IDIAPJGol), Barcelona, Spain
- Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain
| | - Bonaventura Bolibar
- Fundació Institut Universitari per a la recerca a l’Atenció Primària de Salut Jordi Gol i Gurina (IDIAPJGol), Barcelona, Spain
- Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain
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Benítez-Guzmán A, Arriaga-Pizano L, Morán J, Gutiérrez-Pabello JA. Endonuclease G takes part in AIF-mediated caspase-independent apoptosis in Mycobacterium bovis-infected bovine macrophages. Vet Res 2018; 49:69. [PMID: 30021619 PMCID: PMC6052627 DOI: 10.1186/s13567-018-0567-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 06/11/2018] [Indexed: 01/12/2023] Open
Abstract
Mycobacterium bovis, the causative agent of bovine tuberculosis encodes different virulence mechanisms to survive inside of host cells. One of the possible outcomes in this host-pathogen interaction is cell death. Previous results from our group showed that M. bovis induces a caspase-independent apoptosis in bovine macrophages with the possible participation of apoptosis inducing factor mitochondria associated 1 (AIFM1/AIF), a flavoprotein that functions as a cell-death regulator. However, contribution of other caspase-independent cell death mediators in M. bovis-infected macrophages is not known. In this study, we aimed to further characterize M. bovis-induced apoptosis, addressing Endonuclease G (Endo G) and Poly (ADP-ribose) polymerase 1 (PARP-1). In order to accomplish our objective, we infected bovine macrophages with M. bovis AN5 (MOI 10:1). Analysis of M. bovis-infected nuclear protein extracts by immunoblot, identified a 15- and 43-fold increase in concentration of mitochondrial proteins AIF and Endo G respectively. Interestingly, pretreatment of M. bovis-infected macrophages with cyclosporine A, a mitochondrial permeability transition pore inhibitor, abolished AIF and Endo G nuclear translocation. In addition, it also decreased macrophage DNA fragmentation to baseline and caused a 26.2% increase in bacterial viability. We also demonstrated that PARP-1 protein expression in macrophages did not change during M. bovis infection. Furthermore, pretreatment of M. bovis-infected bovine macrophages with 3-aminobenzamide, a PARP-1 inhibitor, did not change the proportion of macrophage DNA fragmentation. Our results suggest participation of Endo G, but not PARP-1, in M. bovis-induced macrophage apoptosis. To the best of our knowledge this is the first report associating Endo G with caspase-independent apoptosis induced by a member of the Mycobacterium tuberculosis complex.
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Affiliation(s)
- Alejandro Benítez-Guzmán
- Laboratorio de Investigación en Tuberculosis Bovina, Departamento de Microbiología e Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Lourdes Arriaga-Pizano
- Unidad Médica de Investigación en Inmunoquímica, Hospital Siglo XXI, IMSS, Mexico City, Mexico
| | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, Mexico
| | - José A Gutiérrez-Pabello
- Laboratorio de Investigación en Tuberculosis Bovina, Departamento de Microbiología e Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico City, Mexico.
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Abstract
SIGNIFICANCE Numerous studies have demonstrated the actions of reactive oxygen species (ROS) as regulators of several physiological processes. In this study, we discuss how redox signaling mechanisms operate to control different processes such as neuronal differentiation, oligodendrocyte differentiation, dendritic growth, and axonal growth. Recent Advances: Redox homeostasis regulates the physiology of neural stem cells (NSCs). Notably, the neuronal differentiation process of NSCs is determined by a change toward oxidative metabolism, increased levels of mitochondrial ROS, increased activity of NADPH oxidase (NOX) enzymes, decreased levels of Nrf2, and differential regulation of different redoxins. Furthermore, during the neuronal maturation processes, NOX and MICAL produce ROS to regulate cytoskeletal dynamics, which control the dendritic and axonal growth, as well as the axonal guidance. CRITICAL ISSUES The redox homeostasis changes are, in part, attributed to cell metabolism and compartmentalized production of ROS, which is regulated, sensed, and transduced by different molecules such as thioredoxins, glutaredoxins, peroxiredoxins, and nucleoredoxin to control different signaling pathways in different subcellular regions. The study of how these elements cooperatively act is essential for the understanding of nervous system development, as well as the application of regenerative therapies that recapitulate these processes. FUTURE DIRECTIONS The information about these topics in the last two decades leads us to the conclusion that the role of ROS signaling in development of the nervous system is more important than it was previously believed and makes clear the importance of exploring in more detail the mechanisms of redox signaling. Antioxid. Redox Signal. 28, 1603-1625.
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Affiliation(s)
- Mauricio Olguín-Albuerne
- División de Neurociencias, Instituto de Fisiología Celular , Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular , Universidad Nacional Autónoma de México, Ciudad de México, México
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Morán J, Cuevas J, Liu F, Yon J, Fuentes A. Influence of primary particle polydispersity and overlapping on soot morphological parameters derived from numerical TEM images. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2018.02.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Cid-Castro C, Hernández-Espinosa DR, Morán J. ROS as Regulators of Mitochondrial Dynamics in Neurons. Cell Mol Neurobiol 2018; 38:995-1007. [DOI: 10.1007/s10571-018-0584-7] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 04/12/2018] [Indexed: 12/31/2022]
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Jimenez J, RivasI D, Betancourt N, Macías F, García R, Niño M, Lozoya R, Morán J. DNA damage of single- or double strands in a population exposed to arsenic through drinking water. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.07.337] [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: 10/20/2022]
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Montalvo-Javé EE, Olguín-Martínez M, Hernández-Espinosa DR, Sánchez-Sevilla L, Mendieta-Condado E, Contreras-Zentella ML, Oñate-Ocaña LF, Escalante-Tatersfield T, Echegaray-Donde A, Ruiz-Molina JM, Herrera MF, Morán J, Hernández-Muñoz R. Role of NADPH oxidases in inducing a selective increase of oxidant stress and cyclin D1 and checkpoint 1 over-expression during progression to human gastric adenocarcinoma. Eur J Cancer 2016; 57:50-7. [DOI: 10.1016/j.ejca.2015.11.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 11/12/2015] [Accepted: 11/17/2015] [Indexed: 12/14/2022]
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Janta I, Morán J, Naredo E, Nieto JC, Uson J, Möller I, Bong D, Bruyn GAW, D Agostino MA, Filippucci E, Hammer HB, Iagnocco A, Terslev L, González JM, Mérida JR, Carreño L. How does a cadaver model work for testing ultrasound diagnostic capability for rheumatic-like tendon damage? Rheumatol Int 2016; 36:863-9. [PMID: 26995000 DOI: 10.1007/s00296-016-3460-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 10/20/2015] [Accepted: 03/07/2016] [Indexed: 12/28/2022]
Abstract
To establish whether a cadaver model can serve as an effective surrogate for the detection of tendon damage characteristic of rheumatoid arthritis (RA). In addition, we evaluated intraobserver and interobserver agreement in the grading of RA-like tendon tears shown by US, as well as the concordance between the US findings and the surgically induced lesions in the cadaver model. RA-like tendon damage was surgically induced in the tibialis anterior tendon (TAT) and tibialis posterior tendon (TPT) of ten ankle/foot fresh-frozen cadaveric specimens. Of the 20 tendons examined, six were randomly assigned a surgically induced partial tear; six a complete tear; and eight left undamaged. Three rheumatologists, experts in musculoskeletal US, assessed from 1 to 5 the quality of US imaging of the cadaveric models on a Likert scale. Tendons were then categorized as having either no damage, (0); partial tear, (1); or complete tear (2). All 20 tendons were blindly and independently evaluated twice, over two rounds, by each of the three observers. Overall, technical performance was satisfactory for all items in the two rounds (all values over 2.9 in a Likert scale 1-5). Intraobserver and interobserver agreement for US grading of tendon damage was good (mean κ values 0.62 and 0.71, respectively), with greater reliability found in the TAT than the TPT. Concordance between US findings and experimental tendon lesions was acceptable (70-100 %), again greater for the TAT than for the TPT. A cadaver model with surgically created tendon damage can be useful in evaluating US metric properties of RA tendon lesions.
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Affiliation(s)
- Iustina Janta
- Department of Rheumatology, Faculty of Medicine, Hospital General Universitario Gregorio Marañón, Universidad Complutense, Doctor Esquerdo 46, 28007, Madrid, Spain.
| | - Julio Morán
- Department of Traumatology and Orthopaedic Surgery, Faculty of Medicine, Hospital General Universitario Gregorio Marañón, Universidad Complutense, Madrid, Spain
| | - Esperanza Naredo
- Department of Rheumatology, Faculty of Medicine, Hospital General Universitario Gregorio Marañón, Universidad Complutense, Doctor Esquerdo 46, 28007, Madrid, Spain
| | - Juan Carlos Nieto
- Department of Rheumatology, Faculty of Medicine, Hospital General Universitario Gregorio Marañón, Universidad Complutense, Doctor Esquerdo 46, 28007, Madrid, Spain
| | - Jacqueline Uson
- Department of Rheumatology, Hospital Universitario de Móstoles, Madrid, Spain
| | - Ingrid Möller
- Department of Rheumatology, Instituto Poal, Barcelona, Spain
| | - David Bong
- Department of Rheumatology, Instituto Poal, Barcelona, Spain
| | | | - Maria Antonietta D Agostino
- Department of Rheumatology, Hôpital Ambroise Paré, APHP, Université Paris Ouest-Versailles-Saint Quentin en Yvelines, Boulogne-Billancourt, France
| | - Emilio Filippucci
- Department of Rheumatology, Clinica Reumatologica, Universitá Politecnica delle Marche, Jesi, Ancona, Italy
| | | | | | - Lene Terslev
- Department of Rheumatology, Center for Rheumatology and Spine Diseases, Rigshospitalet - Glostrup, Copenhagen, Denmark
| | - Jorge Murillo González
- Department of Human Anatomy and Embryology, Faculty of Medicine, Universidad Complutense, Madrid, Spain
| | - José Ramón Mérida
- Department of Human Anatomy and Embryology, Faculty of Medicine, Universidad Complutense, Madrid, Spain
| | - Luis Carreño
- Department of Rheumatology, Faculty of Medicine, Hospital General Universitario Gregorio Marañón, Universidad Complutense, Doctor Esquerdo 46, 28007, Madrid, Spain
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de Pedro M, Morán J, Díaz I, Murias L, Fernández- Plaza C, González C, Díaz E. Circadian Kisspeptin expression in human term placenta. Placenta 2015; 36:1337-9. [DOI: 10.1016/j.placenta.2015.09.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 09/16/2015] [Accepted: 09/18/2015] [Indexed: 10/23/2022]
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Rosell-Murphy M, Rodriguez-Blanco T, Morán J, Pons-Vigués M, Elorza-Ricart JM, Rodríguez J, Pareja C, Nuin MÁ, Bolíbar B. Variability in screening prevention activities in primary care in Spain: a multilevel analysis. BMC Public Health 2015; 15:473. [PMID: 25947302 PMCID: PMC4440275 DOI: 10.1186/s12889-015-1767-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 04/21/2015] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Despite evidence of the benefits of prevention activities, studies have reported only partial integration and great variability of screening in daily clinical practice. The study objectives were: 1) To describe Primary Health Care (PHC) screening for arterial hypertension, dyslipidaemia, obesity, tobacco use, and excessive alcohol consumption in 2008 in 2 regions of Spain, based on electronic health records, and 2) To assess and quantify variability in screening, and identify factors (of patient, general practitioners and PHC team) associated with being screened, that are common throughout the PHC population. METHODS Multicentre, cross-sectional study of individuals aged ≥ 16 years (N = 468,940) who visited the 426 general practitioners (GPs) in 44 PHC teams in Catalonia and Navarre in 2008. OUTCOMES screening for hypertension, dyslipidaemia, obesity, tobacco use, and excessive alcohol consumption. Other variables were considered at the individual (sociodemographics, visits, health problems), GP and PHC team (region among others). Individual and contextual factors associated with the odds of being screened and the variance attributable to each level were identified using the SAS PROC GLIMMIX macro. RESULTS The most prevalent screenings were for dyslipidaemia (64.4%) and hypertension (50.8%); the least prevalent was tobacco use (36.6%). Overall, the odds of being screened were higher for women, older patients, those with more comorbidities, more cardiovascular risk factors, and more frequent office visits, and those assigned to a female GP, a GP with a lower patient load, or a PHC team with a lower percentage of patients older than 65 years. On average, individuals in Navarre were less likely to be screened than those in Catalonia. Hypertension and dyslipidaemia screenings had the least unexplained variability between PHC teams and GPs, respectively, after adjusting for individual and contextual factors. CONCLUSIONS Of the studied screenings, those for obesity, tobacco, and alcohol use were the least prevalent. Attention to screening, especially for tobacco and alcohol, can be greatly improved in the PHC setting.
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Affiliation(s)
- Magdalena Rosell-Murphy
- Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Av Gran Via de les Corts Catalanes, 587, 08007, Barcelona, Spain.
- Equip d'Atenció Primària Serraparera. Institut Català de la Salut, Cerdanyola del Vallès, Spain.
| | - Teresa Rodriguez-Blanco
- Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Av Gran Via de les Corts Catalanes, 587, 08007, Barcelona, Spain.
- Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain.
| | - Julio Morán
- Dirección Atención Primaria, Servicio Navarro de Salud - Osasunbidea, Navarra, Spain.
| | - Mariona Pons-Vigués
- Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Av Gran Via de les Corts Catalanes, 587, 08007, Barcelona, Spain.
- Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain.
| | - Josep M Elorza-Ricart
- SIDIAP, Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Barcelona, Spain.
| | - Jordi Rodríguez
- Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Av Gran Via de les Corts Catalanes, 587, 08007, Barcelona, Spain.
- SIDIAP, Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Barcelona, Spain.
| | - Clara Pareja
- Equip d'Atenció Primària La Mina. Institut Català de la Salut, Barcelona, Spain.
| | - María Ángeles Nuin
- Dirección Atención Primaria, Servicio Navarro de Salud - Osasunbidea, Navarra, Spain.
| | - Bonaventura Bolíbar
- Institut Universitari d'Investigació en Atenció Primària Jordi Gol (IDIAP Jordi Gol), Av Gran Via de les Corts Catalanes, 587, 08007, Barcelona, Spain.
- Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain.
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22
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Abstract
Reactive oxygen species (ROS) act as signaling molecules that regulate nervous system physiology. ROS have been related to neural differentiation, neuritogenesis, and programmed cell death. Nevertheless, little is known about the mechanisms involved in the regulation of ROS during neuronal development. In this study, we evaluated the mechanisms by which ROS are regulated during neuronal development and the implications of these molecules in this process. Primary cultures of cerebellar granule neurons (CGN) were used to address these issues. Our results show that during the first 3 days of CGN development in vitro (days in vitro; DIV), the levels of ROS increased, reaching a peak at 2 and 3 DIV under depolarizing (25 mM KCl) and nondepolarizing (5 mM KCl) conditions. Subsequently, under depolarizing conditions, the ROS levels markedly decreased, but in nondepolarizing conditions, the ROS levels increased gradually. This correlated with the extent of CGN maturation. Also, antioxidants and NADPH-oxidases (NOX) inhibitors reduced the expression of Tau and MAP2. On the other hand, the levels of glutathione markedly increased at 1 DIV. We inferred that the ROS increase at this time is critical for cell survival because glutathione depletion leads to axonal degeneration and CGN death only at 2 DIV. During the first 3 DIV, NOX2 was upregulated and expressed in filopodia and growth cones, which correlated with the hydrogen peroxide (H2O2) distribution in the cell. Finally, NOX2 KO CGN showed shorter neurites than wild-type CGN. Taken together, these results suggest that the regulation of ROS is critical during the early stages of CGN development.
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Affiliation(s)
- Mauricio Olguín-Albuerne
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, México
| | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, México
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23
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Valencia-Olvera AC, Morán J, Camacho-Carranza R, Prospéro-García O, Espinosa-Aguirre JJ. CYP2E1 induction leads to oxidative stress and cytotoxicity in glutathione-depleted cerebellar granule neurons. Toxicol In Vitro 2014; 28:1206-14. [PMID: 24929095 DOI: 10.1016/j.tiv.2014.05.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [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: 01/30/2014] [Revised: 03/25/2014] [Accepted: 05/30/2014] [Indexed: 11/27/2022]
Abstract
Increasing evidence suggests that brain cytochrome P450 (CYP) can contribute to the in situ metabolism of xenobiotics. In the liver, some xenobiotics can be metabolized by CYPs into more reactive products that can damage hepatocytes and induce cell death. In addition, normal CYP activity may produce reactive oxygen species (ROS) that contribute to cell damage through oxidative mechanisms. CYP2E1 is a CYP isoform that can generate ROS leading to cytotoxicity in multiple tissue types. The aim of this study was to determine whether CYP2E1 induction may lead to significant brain cell impairment. Immunological analysis revealed that exposure of primary cerebellar granule neuronal cultures to the CYP inducer isoniazid, increased CYP2E1 expression. In the presence of buthionine sulfoximine, an agent that reduces glutathione levels, isoniazid treatment also resulted in reactive oxygen species (ROS) production, DNA oxidation and cell death. These effects were attenuated by simultaneous exposure to diallyl sulfide, a CYP2E1 inhibitor, or to a mimetic of superoxide dismutase/catalase, (Euka). These results suggest that in cases of reduced antioxidant levels, the induction of brain CYP2E1 could represent a risk of in situ neuronal damage.
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Affiliation(s)
- Ana Carolina Valencia-Olvera
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, D.F., Mexico
| | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, D.F., Mexico
| | - Rafael Camacho-Carranza
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, D.F., Mexico
| | - Oscar Prospéro-García
- Grupo de Neurociencias, Laboratorio de Canabinoides, Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, DF, Mexico
| | - Jesús Javier Espinosa-Aguirre
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, D.F., Mexico.
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24
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Abstract
We have previously reported that in response to early life stress, such as maternal hyperthyroidism and maternal separation (MS), the rat hypothalamic vasopressinergic system becomes up-regulated, showing enlarged nuclear volume and cell number, with stress hyperresponsivity and high anxiety during adulthood. The detailed signaling pathways involving cell death/survival, modified by adverse experiences in this developmental window remains unknown. Here, we report the effects of MS on cellular density and time-dependent fluctuations of the expression of pro- and anti-apoptotic factors during the development of the hypothalamus. Neonatal male rats were exposed to 3 h-daily MS from postnatal days 2 to 15 (PND 2-15). Cellular density was assessed in the hypothalamus at PND 21 using methylene blue staining, and neuronal nuclear specific protein and glial fibrillary acidic protein immunostaining at PND 36. Expression of factors related to apoptosis and cell survival in the hypothalamus was examined at PND 1, 3, 6, 9, 12, 15, 20 and 43 by Western blot. Rats subjected to MS exhibited greater cell-density and increased neuronal density in all hypothalamic regions assessed. The time course of protein expression in the postnatal brain showed: (1) decreased expression of active caspase 3; (2) increased Bcl-2/Bax ratio; (3) increased activation of ERK1/2, Akt and inactivation of Bad; PND 15 and PND 20 were the most prominent time-points. These data indicate that MS can induce hypothalamic structural reorganization by promoting survival, suppressing cell death pathways, increasing cellular density which may alter the contribution of these modified regions to homeostasis.
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25
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Alarcón-Aguilar A, Luna-López A, Ventura-Gallegos JL, Lazzarini R, Galván-Arzate S, González-Puertos VY, Morán J, Santamaría A, Königsberg M. Primary cultured astrocytes from old rats are capable to activate the Nrf2 response against MPP+ toxicity after tBHQ pretreatment. Neurobiol Aging 2014; 35:1901-12. [PMID: 24650792 DOI: 10.1016/j.neurobiolaging.2014.01.143] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [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: 05/03/2013] [Revised: 12/18/2013] [Accepted: 01/30/2014] [Indexed: 01/07/2023]
Abstract
Astrocytes are key players for brain physiology, protecting neurons by releasing antioxidant enzymes; however, they are also susceptible to damage by neurotoxins. Nuclear factor erythroid-derived 2-like 2 (Nrf2) is a central regulator of the antioxidant response, and therefore, pharmacologic inducers are often used to activate this transcription factor to induce cellular protection. To date, it still remains unknown if cells from aged animals are capable of developing this response. Therefore, the purpose of this work was to determine if cortical astrocytes derived from old rats are able to respond to tertbuthyl-hydroquinene (tBHQ) pretreatment and stimulate the Nrf2-antioxidant response pathway to induce an antioxidant strategy against MPP+ toxicity, one of the most used molecules to model Parkinson's disease. Our results show that, although astrocytes from adult and old rats were more susceptible to MPP+ toxicity than astrocytes from newborn rats, when pretreated with tertbuthyl-hydroquinene, they were able to transactivate Nrf2, increasing antioxidant enzymes and developing cellular protection. These results are discussed in terms of the doses used to create protective responses.
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Affiliation(s)
- Adriana Alarcón-Aguilar
- Departamento de Ciencias de la Salud, DCBS, Universidad Autónoma Metropolitana Iztapalapa, ciudad de México, México
| | - Armando Luna-López
- Area de Ciencia Básica, Instituto Nacional de Geriatría, SSA, ciudad de México, Mexico
| | - José L Ventura-Gallegos
- Departamento de Medicina Genómica y Toxicología Ambiental, IIB, UNAM, ciudad de México, México; Departamento de Bioquímica, INCMNZS, ciudad de México, México
| | - Roberto Lazzarini
- Departamento de Ciencias de la Salud, DCBS, Universidad Autónoma Metropolitana Iztapalapa, ciudad de México, México
| | - Sonia Galván-Arzate
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía, SSA, ciudad de México, México
| | - Viridiana Y González-Puertos
- Departamento de Ciencias de la Salud, DCBS, Universidad Autónoma Metropolitana Iztapalapa, ciudad de México, México
| | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, ciudad de México, México
| | - Abel Santamaría
- Laboratorio de Aminoácidos Excitadores, Instituto Nacional de Neurología y Neurocirugía, SSA, México, México
| | - Mina Königsberg
- Departamento de Ciencias de la Salud, DCBS, Universidad Autónoma Metropolitana Iztapalapa, ciudad de México, México.
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26
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Noriega-Navarro R, Lopez-Charcas O, Hernández-Enríquez B, Reyes-Gutiérrez PE, Martínez R, Landa A, Morán J, Gomora JC, Garcia-Valdes J. Novel TASK channels inhibitors derived from dihydropyrrolo[2,1-a]isoquinoline. Neuropharmacology 2013; 79:28-36. [PMID: 24212057 DOI: 10.1016/j.neuropharm.2013.10.028] [Citation(s) in RCA: 6] [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: 05/30/2012] [Revised: 10/22/2013] [Accepted: 10/27/2013] [Indexed: 01/12/2023]
Abstract
TASK channels belong to the family of K(+) channels with 4 transmembrane segments and 2 pore domains (4TM/2P) per subunit. These channels have been related to apoptosis in cerebellar granule neurons (CGN), as well as cancer in other tissues. TASK current is regulated by hormones, neurotransmitters, anesthetics and divalent cations, which are not selective. Recently, there has been found some organic compounds that inhibit TASK current selectively. In order to find other modulators, we report here a group of five dihydropyrrolo[2,1-a]isoquinolines (DPIs), four of them with putative anticancer activity, that were evaluated on TASK-1 and TASK-3 channels. The compounds 1, 2 and 3 showed IC50 < 320 μM on TASK-1 and TASK-3, intermediate activity on TASK-1/TASK-3 heterodimer, moderate effect over hslo and TREK-1 (500 μM), and practically not inhibition on Shaker-IR, herg and IRK2.1 potassium channels, when they were expressed heterologously in Xenopus laevis oocytes. In rat CGN, 500 μM of these three compounds induced a decrement by >39% of the TASK-carried leak current. Finally, only compound 1 showed significant protection (∼36%) against apoptotic death of CGN induced by K(+) deprivation. These results suggest that DPI compounds could be potential candidates for designing new selective inhibitors of TASK channels.
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Affiliation(s)
- R Noriega-Navarro
- Departamento de Química Analítica, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, México City 04510, Mexico
| | - O Lopez-Charcas
- Departamento de Neuropatología Molecular, División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, México City 04510, Mexico
| | - B Hernández-Enríquez
- Departamento de Neurodesarrollo y Fisiología, División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, México City 04510, Mexico
| | - P E Reyes-Gutiérrez
- Departamento de Química Orgánica, Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, México City 04510, Mexico
| | - R Martínez
- Departamento de Química Orgánica, Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, México City 04510, Mexico
| | - A Landa
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, México City 04510, Mexico
| | - J Morán
- Departamento de Neurodesarrollo y Fisiología, División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, México City 04510, Mexico
| | - J C Gomora
- Departamento de Neuropatología Molecular, División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, México City 04510, Mexico
| | - J Garcia-Valdes
- Departamento de Química Analítica, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, México City 04510, Mexico.
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27
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Páramo B, Montiel T, Hernández-Espinosa DR, Rivera-Martínez M, Morán J, Massieu L. Calpain activation induced by glucose deprivation is mediated by oxidative stress and contributes to neuronal damage. Int J Biochem Cell Biol 2013; 45:2596-604. [PMID: 23994487 DOI: 10.1016/j.biocel.2013.08.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [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: 02/13/2013] [Revised: 07/30/2013] [Accepted: 08/16/2013] [Indexed: 12/16/2022]
Abstract
The mechanisms leading to neuronal death during glucose deprivation have not been fully elucidated, but a role of oxidative stress has been suggested. In the present study we have investigated whether the production of reactive oxygen species during glucose deprivation, contributes to the activation of calpain, a calcium-dependent protease involved in neuronal injury associated with brain ischemia and cerebral trauma. We have observed a rapid activation of calpain, as monitored by the cleavage of the cytoskeletal protein α-spectrin, after glucose withdrawal, which is reduced by inhibitors of xanthine oxidase, phospholipase A2 and NADPH oxidase. Results suggest that phospholipase A2 and NADPH oxidase contribute to the early activation of calpain after glucose deprivation. In particular NOX2, a member of the NADPH oxidase family is involved, since reduced stimulation of calpain activity is observed after glucose deprivation in hippocampal slices from transgenic mice lacking a functional NOX2. We observed an additive effect of the inhibitors of xanthine oxidase and phospholipase A2 on both ROS production and calpain activity, suggesting a synergistic action of these two enzymes. The present results provide new evidence showing that reactive oxygen species stimulate calpain activation during glucose deprivation and that this mechanism is involved in neuronal death.
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Affiliation(s)
- Blanca Páramo
- Departamento de Neuropatología Molecular, División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México, D.F. CP 04510, Mexico.
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28
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Valencia‐Olvera AC, Morán J, Camacho‐Carranza R, Espinosa‐Aguirre J. Acetaminophen and Isoniazid treatment leads to oxidative stress and cytotoxicity in cerebellar granule neurons possibly by CYP2E1 activation. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.lb632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Julio Morán
- Neuroscience division, Neurodevelopment and PhysiologyCellular Physiology InstituteMexico CityMexico
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29
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Martínez-Baz I, Martínez-Artola V, Reina G, Guevara M, Cenoz MG, Morán J, Irisarri F, Arriazu M, Albeniz E, Castilla J. Effectiveness of the trivalent influenza vaccine in Navarre, Spain, 2010-2011: a population-based test-negative case-control study. BMC Public Health 2013; 13:191. [PMID: 23496887 PMCID: PMC3599901 DOI: 10.1186/1471-2458-13-191] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 02/28/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Some studies have evaluated vaccine effectiveness in preventing outpatient influenza while others have analysed its effectiveness in preventing hospitalizations. This study evaluates the effectiveness of the trivalent influenza vaccine in preventing outpatient illness and hospitalizations from laboratory-confirmed influenza in the 2010-2011 season. METHODS We conducted a nested case-control study in the population covered by the general practitioner sentinel network for influenza surveillance in Navarre, Spain. Patients with influenza-like illness in hospitals and primary health care were swabbed for influenza testing. Influenza vaccination status and other covariates were obtained from health care databases. Using logistic regression, the vaccination status of laboratory-confirmed influenza cases was compared with that of test-negative controls, adjusting for age, sex, comorbidity, outpatient visits in the previous 12 months, health care setting, time between symptom onset and swabbing, period and A(H1N1)pdm09 vaccination. Effectiveness was calculated as (1-odds ratio)x100. RESULTS The 303 confirmed influenza cases (88% for A(H1N1)pdm09 influenza) were compared with the 286 influenza test-negative controls. The percentage of persons vaccinated against influenza was 4.3% and 15.7%, respectively (p<0.001). The adjusted estimate of effectiveness was 67% (95% CI: 24%, 86%) for all patients and 64% (95% CI: 8%, 86%) in those with an indication for vaccination (persons age 60 or older or with major chronic conditions). Having received both the 2010-2011 seasonal influenza vaccine and the 2009-2010 pandemic influenza vaccine provided 87% protection (95% CI: 30%, 98%) as compared to those not vaccinated. CONCLUSION The 2010-2011 seasonal influenza vaccine had a moderate protective effect in preventing laboratory-confirmed influenza.
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Affiliation(s)
- Iván Martínez-Baz
- Instituto de Salud Pública de Navarra, Leyre 15, 31003, Pamplona, Spain.
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30
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Alarcón-Aguilar A, González-Puertos VY, Luna-López A, López-Macay A, Morán J, Santamaría A, Königsberg M. Comparing the effects of two neurotoxins in cortical astrocytes obtained from rats of different ages: involvement of oxidative damage. J Appl Toxicol 2012; 34:127-38. [DOI: 10.1002/jat.2841] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Revised: 10/19/2012] [Accepted: 10/20/2012] [Indexed: 01/05/2023]
Affiliation(s)
- Adriana Alarcón-Aguilar
- Departamento de Ciencias de la Salud, DCBS; Universidad Autónoma Metropolitana Iztapalapa; México D.F. 09340 Mexico
| | | | | | - Ambar López-Macay
- Departamento de Ciencias de la Salud, DCBS; Universidad Autónoma Metropolitana Iztapalapa; México D.F. 09340 Mexico
| | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular; Universidad Nacional Autónoma de México; México D.F. 04510 Mexico
| | | | - Mina Königsberg
- Departamento de Ciencias de la Salud, DCBS; Universidad Autónoma Metropolitana Iztapalapa; México D.F. 09340 Mexico
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31
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Quiroz-Baez R, Ferrera P, Rosendo-Gutiérrez R, Morán J, Bermúdez-Rattoni F, Arias C. Caspase-12 activation is involved in amyloid-β protein-induced synaptic toxicity. J Alzheimers Dis 2012; 26:467-76. [PMID: 21694457 DOI: 10.3233/jad-2011-110326] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Synapse loss is considered to be the best correlate of cognitive impairments in Alzheimer's disease (AD), and growing evidence supports the notion that certain events that trigger neuronal death in AD can be initiated by the local activation of caspases within the synaptic compartment. We have demonstrated previously that presynaptic terminals are particularly vulnerable to endoplasmic-reticulum (ER)-stress depending of amyloid-β protein (Aβ). This toxicity included a notable reduction of actin and synaptophysin protein and mitochondrial dysfunction. This synaptic damage was prevented by incubation with a wide range of caspase inhibitor, suggesting the activation of local synaptic apoptotic mechanisms. The ER-resident caspase-12 was initially identified as a mediator of Aβ neurotoxicity. Thus, the current study was conducted to explore the presence and local activation of the caspase-12 in cortical and hippocampal synaptosomes isolated from rat and from the triple transgenic mouse model of AD (3xTg-AD) in the presence of Aβ and ryanodine. Under these conditions, we found mitochondrial failure accompanied by a reduction in actin levels which was dependent on caspase-12 activation suggesting its participation in Aβ-induced synaptic toxicity.
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Affiliation(s)
- Ricardo Quiroz-Baez
- Departamento de Investigación Básica, Dirección de Investigación, Instituto de Geriatría, Institutos Nacionales de Salud, Secretaría de Salud, México, DF México
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32
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Castilla J, Martínez-Artola V, Salcedo E, Martínez-Baz I, García Cenoz M, Guevara M, Álvarez N, Irisarri F, Morán J, Barricarte A. Vaccine effectiveness in preventing influenza hospitalizations in Navarre, Spain, 2010–2011: Cohort and case–control study. Vaccine 2012; 30:195-200. [DOI: 10.1016/j.vaccine.2011.11.024] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Revised: 10/31/2011] [Accepted: 11/07/2011] [Indexed: 10/15/2022]
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Königsberg M, Zenteno-Savin T, Santamaría A, Morán J. The history of how the free radicals and oxidative stress branch became a part of the Mexican biochemical society. IUBMB Life 2011; 63:803-5. [DOI: 10.1002/iub.556] [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] [Received: 07/12/2011] [Accepted: 07/12/2011] [Indexed: 11/10/2022]
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34
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Lueneberg K, Domínguez G, Arias-Carrión O, Palomero-Rivero M, Millán-Aldaco D, Morán J, Drucker-Colín R, Murillo-Rodríguez E. Cellular viability effects of fatty acid amide hydrolase inhibition on cerebellar neurons. Int Arch Med 2011; 4:28. [PMID: 21854612 PMCID: PMC3171300 DOI: 10.1186/1755-7682-4-28] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Accepted: 08/19/2011] [Indexed: 01/24/2023] Open
Abstract
The endocannabinoid anandamide (ANA) participates in the control of cell death inducing the formation of apoptotic bodies and DNA fragmentation. The aim of this study was to evaluate whether the ANA degrading enzyme, the fatty acid amide hydrolase (FAAH), would induce cellular death. Experiments were performed in cerebellar granule neurons cultured with the FAAH inhibitor, URB597 (25, 50 or 100 nM) as well as endogenous lipids such as oleoylethanolamide (OEA) or palmitoylethanolamide (PEA) and cellular viability was determined by MTT test. Neurons cultured with URB597 (25, 50 or 100 nM) displayed a decrease in cellular viability. In addition, if cultured with OEA (25 nM) or PEA (100 nM), cellular death was found. These results further suggest that URB597, OEA or PEA promote cellular death.
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Affiliation(s)
- Kathia Lueneberg
- Department of Neurology, Philipps University, D-35033 Marburg, Germany.
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Castilla J, Morán J, Martínez-Artola V, Fernández-Alonso M, Guevara M, Cenoz MG, Reina G, Alvarez N, Arriazu M, Elía F, Salcedo E, Barricarte A. Effectiveness of the monovalent influenza A(H1N1)2009 vaccine in Navarre, Spain, 2009–2010: Cohort and case-control study. Vaccine 2011; 29:5919-24. [DOI: 10.1016/j.vaccine.2011.06.063] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 06/10/2011] [Accepted: 06/15/2011] [Indexed: 10/18/2022]
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Hernández-Enríquez B, Guemez-Gamboa A, Morán J. Reactive oxygen species are related to ionic fluxes and volume decrease in apoptotic cerebellar granule neurons: role of NOX enzymes. J Neurochem 2011; 117:654-64. [PMID: 21371036 DOI: 10.1111/j.1471-4159.2011.07231.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Reactive oxygen species (ROS) are produced early during apoptosis of cerebellar granule neurons induced by low potassium (K5) and staurosporine (Sts). In addition, K5 and Sts activate NADPH oxidases (NOX). Recently, we described that K5 and Sts induce apoptotic volume decrease (AVD) at a time when ROS generation and NOX activity occur. In the present study, we evaluated the relationship between ROS generation and ionic fluxes during AVD. Here, we showed that K5- and Sts-induced AVD was inhibited by antioxidants and that direct ROS production induced AVD. Moreover, NOX inhibitors eliminated AVD induced by both K5 and Sts. Sts, but not K5, failed to induce AVD in cerebellar granule neurons from NOX2 knockout mice. These findings suggest that K5- and Sts-induced AVD is largely mediated by ROS produced by NOX. On the other hand, we also found that the blockage of ionic fluxes involved in AVD inhibited both ROS generation and NOX activity. These findings suggest that ROS generation and NOX activity are involved in ionic fluxes activation, which in turn could maintain ROS generation by activating NOX, leading to a self-amplifying cycle.
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Affiliation(s)
- Berenice Hernández-Enríquez
- División de Neurociencias, Departamento de Neurodesarrollo y Fisiología, Universidad Nacional Autónoma de México, México, DF, México
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Castilla J, Morán J, Fernández-Alonso M, Martínez Artola V, Zamora MJ, Mazón A, Fernández C, García Cenoz M, Elía F, Reina G, Salcedo E, Irisarri F, Barricarte A. [The 2009 H1N1 flu pandemic in Navarre, Spain]. An Sist Sanit Navar 2011; 33:287-95. [PMID: 21233864 DOI: 10.4321/s1137-66272010000400005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND To describe flu activity during the 2009-2010 pandemic in Navarre and compare it to previous seasons. METHODS An analysis was made of all flu cases reported in primary care and all the virological confirmations made in patients in primary care and in hospitals of Navarre between week 21 of 2009 and week 20 of 2010. RESULTS Influenza A (H1N1) Virus 2009 was detected in Navarre between week 23 of 2009 and week 2 of 2010, a period when 39 medically diagnosed cases of flu syndrome per 1,000 inhabitants were registered. The epidemic threshold was surpassed in two periods, with a peak in July and a greater one in November. The greatest incidence was reached in children aged between 5 and 14 years (121 per thousand), followed by the group of under fives. There were 224 hospitalisations (36 per 100,000 inhabitants) with confirmation of Influenza A (H1N1) Virus 2009, 8% of whom required admission to intensive care units and there were four deaths (0.6 per 100,000 inhabitants). The rate of hospitalisation was greater amongst children under five (163 per 100,000 inhabitants), while the probability of referral to intensive care increased with age. CONCLUSION In spite of not having a specific vaccine available until the season was very well advanced, Influenza A (H1N1)Virus 2009 produced a flu wave with similar levels to those of other seasons and its repercussion in hospitalisations and serious cases was moderate.
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Cruz VPDL, Elinos-Calderón D, Carrillo-Mora P, Silva-Adaya D, Konigsberg M, Morán J, Ali SF, Chánez-Cárdenas ME, Pérez-De La Cruz G, Santamaría A. Time-course correlation of early toxic events in three models of striatal damage: Modulation by proteases inhibition. Neurochem Int 2010; 56:834-42. [DOI: 10.1016/j.neuint.2010.03.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 03/03/2010] [Accepted: 03/11/2010] [Indexed: 11/30/2022]
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Hernández-Enríquez B, Arellano R, Morán J. Role for ionic fluxes on cell death and apoptotic volume decrease in cultured cerebellar granule neurons. Neuroscience 2010; 167:298-311. [DOI: 10.1016/j.neuroscience.2010.01.046] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2009] [Revised: 01/21/2010] [Accepted: 01/22/2010] [Indexed: 01/17/2023]
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Ramiro-Cortés Y, Morán J. Role of oxidative stress and JNK pathway in apoptotic death induced by potassium deprivation and staurosporine in cerebellar granule neurons. Neurochem Int 2009; 55:581-92. [DOI: 10.1016/j.neuint.2009.05.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2009] [Revised: 05/01/2009] [Accepted: 05/21/2009] [Indexed: 02/07/2023]
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Guemez-Gamboa A, Morán J. NOX2 mediates apoptotic death induced by staurosporine but not by potassium deprivation in cerebellar granule neurons. J Neurosci Res 2009; 87:2531-40. [PMID: 19360906 DOI: 10.1002/jnr.22079] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Neuronal apoptotic death involves the participation of reactive oxygen species (ROS), but their sources have not been completely elucidated. Previous studies have demonstrated that the ROS-producing enzyme NADPH oxidase is present in neuronal cells and that this enzyme could participate in the apoptotic neuronal death. Cerebellar granule neurons (CGN) undergo apoptosis when cells are transferred from a medium with 25 mM KCl (K25) to a 5 mM KCl (K5) medium or when they are treated with staurosporine (ST). Under these conditions, apoptotic death of CGN is dependent on ROS production. In this study, we evaluated the role of NOX2, an NADPH oxidase homolog, in the apoptotic death of CGN induced by two different conditions. In CGN from NOX2-deficient (ko) mice, a significantly lower rate of apoptotic death occurs compared with wild-type (wt) CGN. Also, caspase-3 activation, NADPH oxidase activity, and superoxide anion production induced by ST were markedly lower in ko neurons than in wt CGN. In contrast to the case with ST, when CGN were treated with K5, no differences were observed between ko and wt cells in any of the parameters measured. However, all NADPH oxidase inhibitors tested noticeably reduced cell death and apoptotic parameters induced by K5 in both wt and ko CGN. These results suggest that NOX2 could be necessary for apoptotic death induced by ST, but not by K5, which could require other member of the NOX family in the apoptotic process.
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Affiliation(s)
- Alicia Guemez-Gamboa
- Departamento de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México D.F., México
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Montes-Rodríguez CJ, Alavez S, Soria-Gómez E, Rueda-Orozco PE, Guzman K, Morán J, Prospéro-García O. BCL-2 and BAX proteins expression throughout the light-dark cycle and modifications induced by sleep deprivation and rebound in adult rat brain. J Neurosci Res 2009; 87:1602-9. [DOI: 10.1002/jnr.21987] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Coyoy A, Valencia A, Guemez-Gamboa A, Morán J. Role of NADPH oxidase in the apoptotic death of cultured cerebellar granule neurons. Free Radic Biol Med 2008; 45:1056-64. [PMID: 18675340 DOI: 10.1016/j.freeradbiomed.2008.06.027] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [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: 03/18/2008] [Revised: 06/11/2008] [Accepted: 06/13/2008] [Indexed: 12/15/2022]
Abstract
Cerebellar granule neurons (CGN) cultured in a medium containing 25 mM KCl and treated with staurosporine (ST) or transferred to a medium with 5 mM KCl (K5) die apoptotically. CGN death is mediated by an increase in reactive oxygen species (ROS) production. When CGN are treated with antioxidants all apoptotic parameters and cell death are markedly diminished, showing a central role for ROS in this process. Recently, it has been suggested that a possible ROS source involved in cell death is a NADPH oxidase. In that regard, we found expression in CGN of the components of NADPH proteins, p40phox, p47phox and p67phox, and p22phox, as well as three homologues of the catalytic subunit of this complex, NOX1, 2, and 4. The inhibition of NADPH oxidase with diphenylene iodonium or 4-(2-aminoethyl)benzenesulfonyl fluoride significantly reduced ROS production, NADPH oxidase activity, all the apoptotic events, and cell death induced by both K5 and ST. We conclude that ROS could be an early signal of apoptotic neuronal death and that NADPH oxidase, including NOX1, 2, and/or 4, could have a central role in apoptotic death induced by different conditions in these neurons.
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Affiliation(s)
- Angélica Coyoy
- Departamento de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, 04510 México, DF, México
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Bolíbar B, Pareja C, Astier-Peña MP, Morán J, Rodríguez-Blanco T, Rosell-Murphy M, Iglesias M, Juncosa S, Mascort J, Violan C, Magallón R, Apezteguia J. Variability in the performance of preventive services and in the degree of control of identified health problems: a primary care study protocol. BMC Public Health 2008; 8:281. [PMID: 18691407 PMCID: PMC2533323 DOI: 10.1186/1471-2458-8-281] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Accepted: 08/08/2008] [Indexed: 11/18/2022] Open
Abstract
Background Preventive activities carried out in primary care have important variability that makes necessary to know which factors have an impact in order to establish future strategies for improvement. The present study has three objectives: 1) To describe the variability in the implementation of 7 preventive services (screening for smoking status, alcohol abuse, hypertension, hypercholesterolemia, obesity, influenza and tetanus immunization) and to determine their related factors; 2) To describe the degree of control of 5 identified health problems (smoking, alcohol abuse, hypertension, hypercholesterolemia and obesity); 3) To calculate intraclass correlation coefficients. Design Multi-centered cross-sectional study of a randomised sample of primary health care teams from 3 regions of Spain designed to analyse variability and related factors of 7 selected preventive services in years 2006 and 2007. At the end of 2008, we will perform a cross-sectional study of a cohort of patients attended in 2006 or 2007 to asses the degree of control of 5 identified health problems. All subjects older than16 years assigned to a randomised sample of 22 computerized primary health care teams and attended during the study period are included in each region providing a sample with more than 850.000 subjects. The main outcome measures will be implementation of 7 preventive services and control of 5 identified health problems. Furthermore, there will be 3 levels of data collection: 1) Patient level (age, gender, morbidity, preventive services, attendance); 2) Health-care professional level (professional characteristics, years working at the team, workload); 3) Team level (characteristics, electronic clinical record system). Data will be transferred from electronic clinical records to a central database with prior encryption and dissociation of subject, professional and team identity. Global and regional analysis will be performed including standard analysis for primary health care teams and health-care professional level. Linear and logistic regression multilevel analysis adjusted for individual and cluster variables will also be performed. Variability in the number of preventive services implemented will be calculated with Poisson multilevel models. Team and health-care professional will be considered random effects. Intraclass correlation coefficients, standard error and variance components for the different outcome measures will be calculated.
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Affiliation(s)
- Bonaventura Bolíbar
- Institut d'Investigació en Atenció Primària Jordi Gol, C/Gran Via de Corts Catalanes 587 àtic, 08007 Barcelona, Spain.
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Pérez-De La Cruz V, Konigsberg M, Pedraza-Chaverri J, Herrera-Mundo N, Díaz-Muñoz M, Morán J, Fortoul-van der Goes T, Rondán-Zárate A, Maldonado PD, Ali SF, Santamaría A. Cytoplasmic calcium mediates oxidative damage in an excitotoxic /energetic deficit synergic model in rats. Eur J Neurosci 2008; 27:1075-85. [PMID: 18364032 DOI: 10.1111/j.1460-9568.2008.06088.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Excessive calcium is responsible for triggering different potentially fatal metabolic pathways during neurodegeneration. In this study, we evaluated the role of calcium on the oxidative damage produced in an in vitro combined model of excitotoxicity/energy deficit produced by the co-administration of quinolinate and 3-nitropropionate to brain synaptosomal membranes. Synaptosomal fractions were incubated in the presence of subtoxic concentrations of these agents (21 and 166 microm, respectively). In order further to characterize possible toxic mechanisms involved in oxidative damage in this experimental paradigm, agents with different properties - dizocilpine, acetyl L-carnitine, iron porphyrinate and S-allylcysteine - were tested at increasing concentrations (10-1000 microm). Lipid peroxidation was assessed by the formation of thiobarbituric acid-reactive substances. For confirmatory purposes, additional fractions were incubated in parallel in the presence of the intracellular calcium chelator 1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid-acetoxymethyl ester (BAPTA-AM). Under physiological conditions of extracellular calcium availability, synaptomes exposed to both toxins displayed an increased lipoperoxidation (76% above controls), and this effect was partially attenuated by the tested agents as follows: dizocilpine = iron porphyrinate > acetyl L-carnitine > S-allylcysteine. When the incubation medium was deprived of calcium, the lipoperoxidative effect achieved in this experimental paradigm was still high (49% above the control), and the order of attenuation was: iron porphyrinate > S-allylcysteine > acetyl L-carnitine > dizocilpine. BAPTA-AM was effective in preventing the pro-oxidant action of both toxins, promoting even lower peroxidative levels than those quantified under basal conditions. Our results suggest that the lipid peroxidation induced in synaptosomal fractions by quinolinate plus 3-nitropropionate is largely dependent on the cytoplasmic concentrations of calcium.
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Affiliation(s)
- Verónica Pérez-De La Cruz
- Laboratorio de Aminoácidos Excitadores, Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, S.S.A., México DF 14269, México
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Miñano A, Caballero-Benítez A, Lluch M, Morán J, Rodríguez-Alvarez J. C2-ceramide mediates cerebellar granule cells apoptosis by activation of caspases-2, -9, and -3. J Neurosci Res 2008; 86:1734-47. [DOI: 10.1002/jnr.21633] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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García Cenoz M, Castilla J, Montes Y, Morán J, Salaberri A, Elía F, Floristán Y, Rodrigo I, Irisarri F, Arriazu M, Zabala A, Barricarte A. Incidencia de la varicela y el herpes zóster antes de la introducción de la vacunación sistemática infantil en Navarra, 2005-2006. An Sist Sanit Navar 2008; 31:71-80. [DOI: 10.4321/s1137-66272008000100006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Maycotte P, Blancas S, Morán J. Role of Inhibitor of Apoptosis Proteins and Smac/DIABLO in Staurosporine-induced Cerebellar Granule Neurons Death. Neurochem Res 2008; 33:1534-40. [DOI: 10.1007/s11064-008-9637-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2007] [Accepted: 02/20/2008] [Indexed: 12/01/2022]
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Castillo-Olamendi L, Bravo-Garcìa A, Morán J, Rocha-Sosa M, Porta H. AtMCP1b, a chloroplast-localised metacaspase, is induced in vascular tissue after wounding or pathogen infection. Funct Plant Biol 2008; 34:1061-1071. [PMID: 32689436 DOI: 10.1071/fp07153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2007] [Accepted: 10/17/2007] [Indexed: 05/08/2023]
Abstract
cDNA corresponding to the Arabidopsis type I metacaspase AtMCP1b was isolated from plants infected with Pseudomonas syringae. A positive correlation between AtMCP1b expression and cell death was observed in the presence of staurosporine, a protein kinase inhibitor that induces programmed cell death. The tissue localisation of an AtMCP1b promoter-GUS fusion was observed in the vascular tissue of transgenic plants. GUS activity increased in response to an incompatible DC3000 (avrRpm1) or a compatible DC3000 P. syringae infection, or to wounding. Confocal and immunohistochemical analysis of Arabidopsis thaliana (L.) leaves showed that an AtMCP1b-GFP fusion protein was localised in the chloroplasts. Our data support a positive correlation between AtMCP1b gene expression and cell death in response to wounding or pathogenic interactions. Moreover, the localisation of AtMCP1b gene expression within vascular tissue and cells of abscission regions strongly supports a role for AtMCP1b in programmed cell dismantling events in response to environmental and developmental triggers. The AtMCP1b-GFP subcellular localisation infers a role for the plastid organelles in PCD and, thus, in responses to pathogen attack and development.
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Affiliation(s)
- Luis Castillo-Olamendi
- Departmento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor., México
| | - Armando Bravo-Garcìa
- Departmento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor., México
| | - Julio Morán
- Departmento de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Cuernavaca, Mor., México
| | - Mario Rocha-Sosa
- Departmento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor., México
| | - Helena Porta
- Departmento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mor., México
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Bazán-Peregrino M, Gutiérrez-Kobeh L, Morán J. Role of brain-derived neurotrophic factor in the protective action of N-methyl-D-aspartate in the apoptotic death of cerebellar granule neurons induced by low potassium. J Neurosci Res 2007; 85:332-41. [PMID: 17086548 DOI: 10.1002/jnr.21112] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [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: 11/10/2022]
Abstract
Several neurotrophic factors, including brain-derived neurotrophic factor (BDNF), and neurotransmitters, such as glutamate, may influence neuronal apoptotic death. Rat cerebellar granule neurons (CGN) cultured in low potassium (5 or 10 mM KCl) for more than 5 days in vitro (DIV) die apoptotically. These cells survive in the presence of high potassium (25 mM KCl, K25) or N-methyl-D-aspartate (NMDA), an agonist of glutamatergic receptors. CGN transferred from high to low potassium die apoptotically. Here, we characterized the effect of BDNF and NMDA on the apoptotic death induced by low potassium in CGN. Cell death of CGN by culturing in low potassium for 6 DIV was inhibited by BDNF and NMDA. When CGN were cultured in K25 and transferred to a low-potassium medium, 65% of neurons died after 48 hr. Under these conditions, BDNF, NMDA, or BDNF + NMDA increased CGN survival. Both BDNF and NMDA decreased caspase-9 activity and mRNA caspase-3 levels and activity induced by low potassium. CGN survival induced by BDNF is mediated by TrkB activation, whereas that induced by NMDA is mediated by NMDA receptor and TrkB activation. NMDA, but not BDNF, raised [Ca(2+)](i), which was reduced by low-potassium treatment. These results suggest that NMDA receptor stimulation induces CGN survival through the influx of extracellular Ca(2+) that may evoke the release of BDNF and the activation of TrkB. Complementary mechanisms induced by depolarization and changes in Ca(2+) levels would also contribute to the neuroprotection exerted by NMDA and potassium.
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Affiliation(s)
- Miriam Bazán-Peregrino
- Departamento de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México D.F., México
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