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Molina V, Bachiller A, Gomez-Pilar J, Lubeiro A, Hornero R, Cea-Cañas B, Valcárcel C, Haidar MK, Poza J. Deficit of entropy modulation of the EEG in schizophrenia associated to cognitive performance and symptoms. A replication study. Schizophr Res 2018; 195:334-342. [PMID: 28886890 DOI: 10.1016/j.schres.2017.08.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 07/26/2017] [Accepted: 08/29/2017] [Indexed: 01/23/2023]
Abstract
Spectral entropy (SE) is a measurement from information theory field that provides an estimation of EEG regularity and may be useful as a summary of its spectral properties. Previous studies using small samples reported a deficit of EEG entropy modulation in schizophrenia during cognitive activity. The present study is aimed at replicating this finding in a larger sample, to explore its cognitive and clinical correlates and to discard antipsychotic treatment as the main source of that deficit. We included 64 schizophrenia patients (21 first episodes, FE) and 65 healthy controls. We computed SE during performance of an odd-ball paradigm, at the windows prior (-300 to 0ms) and following (150 to 450ms) stimulus presentation. Modulation of SE was defined as the difference between post- and pre-stimulus windows. In comparison to controls, patients showed a deficit of SE modulation over frontal and central regions, also shown by FE patients. Baseline SE did not differ between patients and controls. Modulation deficit was directly associated with cognitive deficits and negative symptoms, and inversely with positive symptoms. SE modulation was not related to antipsychotic doses. Patients also showed a smaller change of median frequency (i.e., smaller slowing of oscillatory activity) of the EEG from pre- to post-stimulus windows. These results support that a deficit of fast modulation contributes to cognitive deficits and symptoms in schizophrenia patients.
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Affiliation(s)
- Vicente Molina
- Psychiatry Department, School of Medicine, University of Valladolid, Spain; Psychiatry Service, University Hospital of Valladolid, Valladolid, Spain; Neuroscience Institute of Castilla y León (INCYL), University of Salamanca, Spain; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Spain.
| | - Alejandro Bachiller
- Biomedical Engineering Group, Department TSCIT, ETS Ingenieros de Telecomunicación, University of Valladolid, Spain
| | - Javier Gomez-Pilar
- Biomedical Engineering Group, Department TSCIT, ETS Ingenieros de Telecomunicación, University of Valladolid, Spain
| | - Alba Lubeiro
- Psychiatry Department, School of Medicine, University of Valladolid, Spain
| | - Roberto Hornero
- Neuroscience Institute of Castilla y León (INCYL), University of Salamanca, Spain; Biomedical Engineering Group, Department TSCIT, ETS Ingenieros de Telecomunicación, University of Valladolid, Spain; Instituto de Investigación en Matemática (IMUVA), University of Valladolid, Spain
| | - Benjamín Cea-Cañas
- Clinical Neurophysiology Service, University Hospital of Valladolid, Valladolid, Spain
| | - César Valcárcel
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Spain; Psychiatry Service, University Hospital of Alava, Spain
| | - Mahmoun-Karim Haidar
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Spain; Psychiatry Service, University Hospital of Alava, Spain
| | - Jesús Poza
- Neuroscience Institute of Castilla y León (INCYL), University of Salamanca, Spain; Biomedical Engineering Group, Department TSCIT, ETS Ingenieros de Telecomunicación, University of Valladolid, Spain; Instituto de Investigación en Matemática (IMUVA), University of Valladolid, Spain
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Martín-Santiago O, Suazo V, Rodríguez-Lorenzana A, Ruiz de Azúa S, Valcárcel C, Díez Á, Grau A, Domínguez C, Gallardo R, Molina V. [Relationship between subclinical psychotic symptoms and cognitive performance in the general population]. Rev Psiquiatr Salud Ment 2015; 9:78-86. [PMID: 26655378 DOI: 10.1016/j.rpsm.2015.10.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 06/15/2015] [Accepted: 10/22/2015] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Subclinical psychotic symptoms are associated to negative life outcomes in the general population, but their relationship with cognitive performance is still not well understood. Assessing the relationship between performance in cognitive domains and subclinical psychotic symptoms in the general population may also help understand the handicap attributed to clinical psychosis, in which these alterations are present. METHODS Subclinical and cognitive assessments were obtained in 203 participants from the general population by means of the Community Assessment of Psychic Experiences, the Brief Assessment of Cognition in Schizophrenia, the Wechsler Adults Intelligence Scale and the Wisconsin Card Sorting Test. The positive and negative subclinical symptoms and their relationship with age and cognition were examined, followed by assessing the influence of subclinical depression scores on the possible relationships between those subclinical psychotic symptoms and cognitive deficits. RESULTS Inverse relationships were found between frequency in the Community Assessment of Psychic Experiences positive dimension and motor speed, and frequency and distress in the Community Assessment of Psychic Experiences negative dimension and motor speed. A direct relationship was also found between distress scores of the positive dimension and executive functions. Both positive and negative subclinical symptoms were related to depression scores. CONCLUSIONS Psychotic symptoms, similar to those in the clinical population, may be associated with cognitive deficits in the general population.
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Affiliation(s)
| | - Vanessa Suazo
- Instituto de Neurociencias de Castilla y León (INCYL), Universidad de Salamanca, Salamanca, España
| | - Alberto Rodríguez-Lorenzana
- Instituto de Neurociencias de Castilla y León (INCYL), Universidad de Salamanca, Salamanca, España; Departamento de Psicología, Universidad de las Américas, Quito, Ecuador
| | - Sonia Ruiz de Azúa
- Departamento de Neurociencias, Universidad del País Vasco, Leioa, Vizcaya, España; Servicio de Psiquiatría, Hospital Universitario de Álava, Osakidetza, Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Vitoria, Álava, España
| | - César Valcárcel
- Departamento de Neurociencias, Universidad del País Vasco, Leioa, Vizcaya, España; Servicio de Psiquiatría, Hospital Universitario de Álava, Osakidetza, Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Vitoria, Álava, España
| | - Álvaro Díez
- Division of Psychiatry, Faculty of Brain Sciences, University College London, Londres, Reino Unido
| | - Adriana Grau
- Instituto de Neurociencias de Castilla y León (INCYL), Universidad de Salamanca, Salamanca, España
| | - Cristina Domínguez
- Servicio de Psiquiatría, Hospital Clínico Universitario de Valladolid, Valladolid, España
| | | | - Vicente Molina
- Instituto de Neurociencias de Castilla y León (INCYL), Universidad de Salamanca, Salamanca, España; Servicio de Psiquiatría, Hospital Clínico Universitario de Valladolid, Valladolid, España; Departamento de Psiquiatría, Facultad de Medicina, Universidad de Valladolid, Valladolid, España.
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Nazco GJ, González I, Gutierrez F, Valcárcel C, Rodríguez I, Pérez M, Pecos P, Virgós T, Bullejos M, Chafer M. DGI-049 Octeotride in Gastrointestinal Angiodysplasia. Eur J Hosp Pharm 2013. [DOI: 10.1136/ejhpharm-2013-000276.315] [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: 11/04/2022] Open
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Matute C, Pulakat L, Río C, Valcárcel C, Miledi R. Properties of angiotensin II receptors in glial cells from the adult corpus callosum. Proc Natl Acad Sci U S A 1994; 91:3774-8. [PMID: 8170986 PMCID: PMC43664 DOI: 10.1073/pnas.91.9.3774] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The existence and the properties of angiotensin II receptors in the adult bovine and human corpus callosum (CC) were investigated by using Xenopus oocytes and primary glial cell cultures. In oocytes injected with CC mRNA, angiotensin II elicited oscillatory Cl- currents due to activation of the inositol phosphate/Ca(2+)-receptor-channel coupling system. The receptors expressed in oocytes and in CC cultures were pharmacologically similar to the AT1 receptor type as assayed by binding. Northern blot analysis and in situ hybridization studies in sections from CC and in glial cultures revealed that the receptors were molecularly related to the AT1 receptor and that they were present in astrocytes. In these cells, activation of the receptors with angiotensin II increased de novo DNA synthesis, promoted the release of aldosterone, and induced c-Fos expression. These findings indicate that CC astrocytes possess functional AT1 receptors that participate in various physiological processes.
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Affiliation(s)
- C Matute
- Department of Psychobiology, University of California, Irvine 92717
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