Person:
Satta, Valentina

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First Name
Valentina
Last Name
Satta
URI
https://hdl.handle.net/20.500.14352/85782
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Medicina
Department
Bioquímica y Biología Molecular
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2018 - 201922020 - 20235
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Now showing 1 - 7 of 7
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    Cannabinoid signalling in the immature brain: Encephalopathies and neurodevelopmental disorders
    (Biochemical Pharmacology, 2018) Sagredo Ezquioga, Onintza; Palazuelos Diego, Javier; Gutierrez-Rodriguez, Ana; Satta, Valentina; Galve Roperh, Ismael; Martínez Orgado, José Antonio
    The endocannabinoid system exerts a crucial neuromodulatory role in many brain areas that is essential for proper regulation of neuronal activity. The role of cannabinoid signalling controlling neuronal activity in the adult brain is also evident when considering its contribution to adult brain insults or neurodegenerative diseases. In the context of brain genetic or acquired encephalopathies administration of cannabinoid-based molecules has demonstrated to exert symptomatic relief and hence, they are proposed as new potential therapeutic compounds. This review article summarizes the main evidences indicating the beneficial action of cannabinoid-derived molecules in preclinical models of neonatal hypoxia/ischemic damage. In a second part, we discuss the available evidences of therapeutic actions of cannabidiol in children with refractory epilepsy syndromes. Finally, we discuss the current view of cannabinoid signalling mechanisms active in the immature brain that affect in neural cell fate and can contribute to long-term neural cell plasticity.
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    Retinal Tissue Shows Glial Changes in a Dravet Syndrome Knock-in Mouse Model
    (International Journal of Molecular Sciences, 2023) Salazar Corral, Juan José; Satriano, Andrea; Matamoros, José A.; Fernández Albarral, José; García Martín, Elena Salobrar; López Cuenca, Inés; Hoz Montañana, María Rosa De; Sánchez-Puebla Fernández, Lidia; Ramírez Sebastián, José Manuel; Alonso, Cristina; Satta, Valentina; Hernández Fisac, Inés; Sagredo Ezquioga, Onintza; Ramírez Sebastián, Ana Isabel
    Dravet syndrome (DS) is an epileptic encephalopathy caused by mutations in the Scn1a gene encoding the α1 subunit of the Nav1.1 sodium channel, which is associated with recurrent and generalized seizures, even leading to death. In experimental models of DS, histological alterations have been found in the brain; however, the retina is a projection of the brain and there are no studies that analyze the possible histological changes that may occur in the disease. This study analyzes the retinal histological changes in glial cells (microglia and astrocytes), retinal ganglion cells (RGCs) and GABAergic amacrine cells in an experimental model of DS (Syn-Cre/Scn1aWT/A1783V) compared to a control group at postnatal day (PND) 25. Retinal whole-mounts were labeled with anti-GFAP, anti-Iba-1, anti-Brn3a and anti-GAD65/67. Signs of microglial and astroglial activation, and the number of Brn3a+ and GAD65+67+ cells were quantified. We found retinal activation of astroglial and microglial cells but not death of RGCs and GABAergic amacrine cells. These changes are similar to those found at the level of the hippocampus in the same experimental model in PND25, indicating a relationship between brain and retinal changes in DS. This suggests that the retina could serve as a possible biomarker in DS.
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    Project number: 270
    Puesta en marcha del curso on line “Envejecimiento y enfermedades neurodegenerativas” en la plataforma Miriadax
    (2019) Lago Femia, Eva de; Sagredo Ezquioga, Onintza; García García, María De La Concepción; Hernández Galvez, María Luz; Gómez Ruiz, María; Ramos Atance, José Antonio; Fernandez Ruiz, José Javier; Rodríguez Cueto, Carmen; de Castro Vitores, Jacinto; López Blanco, Olga; Esteban Cubero, Amparo; Satta, Valentina; Espejo Porras, Francisco; Santos-García, Irene; García Toscano, Laura; Alonso Gómez, Cristina
    Este informe detalla los objetivos, actividades y métodos llevados a cabo durante la ejecución de un proyecto de innovación docente que tiene como objetivo implementar un curso online en abierto sobre las enfermedades neurodegenerativas y el envejecimiento.
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    Project number: 259
    Uso la plataforma H5P de creación de contenido interactivo como herramienta para la creación de un laboratorio de bioquímica virtual e interactivo
    (2022) Sagredo Ezquioga, Onintza; Lago Femia, Eva de; García García, María De La Concepción; Navarro Gonzalez de Mesa, Elisa; Gómez Cañas, María; Rodríguez Cueto, Carmen; Satta, Valentina; Hernández Fisac, Inés
    En este proyecto de innovación docente está diseñado para que el alumnado se acerque a un laboratorio de bioquímica virtual e interactivo y conozca los diferentes métodos y técnicas experimentales que se utilizan en ciertos análisis clínicos.
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    Preclinical investigation of β-caryophyllene as a therapeutic agent in an experimental murine model of Dravet syndrome
    (Neuropharmacology, 2022) Alonso Gómez, Cristina; Satta, Valentina; Díez Gutiérrez, Paula; Fernández Ruiz, Javier; Sagredo Ezquioga, Onintza
    Dravet Syndrome (DS) is caused by mutations in the Scn1a gene encoding the α1 subunit of the sodium channel Nav1.1, which results in febrile seizures that progress to severe tonic-clonic seizures and associated comorbidities. Treatment with cannabidiol has been approved for the management of seizures in DS patients, but it appears to be also active against associated comorbidities. In this new study, we have investigated β-caryophyllene (BCP), a cannabinoid with terpene structure that appears to also have a broad-spectrum profile, as a useful therapy against both seizuring activity and progression of associated comorbidities. This has been studied in heterozygous conditional knock-in mice carrying a missense mutation (A1783V) in Scn1a gene expressed exclusively in neurons of the Central Nervous System (Syn-Cre/Scn1aWT/A1783V), using two experimental approaches. In the first approach, an acute treatment with BCP was effective against seizuring activity induced by pentylenetetrazole (PTZ) in wildtype (Scn1aWT/WT) and also in Syn-Cre/Scn1aWT/A1783V mice, with these last animals having a greater susceptibility to PTZ. Such benefits were paralleled by a BCP-induced reduction in PTZ-induced reactive astrogliosis (labelled with GFAP) and microgliosis (labelled with Iba-1) in the prefrontal cortex and the hippocampal dentate gyrus, which were visible in both wildtype (Scn1aWT/WT) and Syn-Cre/Scn1aWT/A1783V mice. In the second approach, both genotypes were treated repeatedly with BCP to investigate its effects on several DS comorbidities. Thus, BCP corrected important behavioural abnormalities of Syn-Cre/Scn1aWT/A1783V mice (e.g. delayed appearance of hindlimb grasp reflex, induction of clasping response, motor hyperactivity, altered social interaction and memory impairment), attenuated weight loss, and slightly delayed premature mortality. Again, these benefits were paralleled by a BCP-induced reduction in reactive astrogliosis and microgliosis in the prefrontal cortex and the hippocampal dentate gyrus typical of Syn-Cre/Scn1aWT/A1783V mice. In conclusion, BCP was active in Syn-Cre/Scn1aWT/A1783V mice against seizuring activity (acute treatment) and against several comorbidities (repeated treatment), in both cases in association with its capability to reduce glial reactivity in areas related to these behavioural abnormalities. This situates BCP in a promising position for further preclinical evaluation towards a close translation to DS patients.
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    Disease-modifying effects of cannabidiol, β-caryophyllene and their combination in Syn1-Cre/Scn1aWT/A1783V mice, a preclinical model of Dravet syndrome
    (Neuropharmacology, 2023) Alonso, Cristina; Satta, Valentina; Hernández Fisac, Inés; Fernández Ruiz, José Javier; Sagredo Ezquioga, Onintza
    Cannabidiol (CBD) has been recently approved as an antiseizure agent in Dravet Syndrome (DS), a pediatric epileptic encephalopathy, but CBD could also be active against associated comorbidities. Such associated comorbidities were also attenuated by the sesquiterpene β-caryophyllene (BCP). Here, we have compared the efficacy of both compounds and further initiated the analysis of a possible additive effect between both compounds in relation with these comorbidities using two experimental approaches. The first experiment was aimed at comparing the benefits of CBD and BCP, including their combination in conditional knock-in Scn1a-A1783V mice, an experimental model of DS, treated since the postnatal day 10th to 24th. As expected, DS mice showed impairment in limb clasping, delay in the appearance of hindlimb grasp reflex and additional behavioural disturbances (e.g., hyperactivity, cognitive deterioration, social interaction deficits). This behavioural impairment was associated with marked astroglial and microglial reactivities in the prefrontal cortex and the hippocampal dentate gyrus. BCP and CBD administered alone were both able to partially attenuate the behavioural disturbances and the glial reactivities, with apparently greater efficacy against glial reactivities obtained with BCP, whereas superior effects in a few specific parameters were obtained when both compounds were combined. In the second experiment, we investigated this additive effect in cultured BV2 cells treated with BCP and/or CBD and stimulated with LPS. As expected, addition of LPS induced a marked increase in several inflammation-related markers (e.g., TLR4, COX-2, iNOS, catalase, TNF-α, IL-1β), as well as elevated Iba-1 immunostaining. Treatment with BCP or CBD attenuated these elevations, but, again and in general, superior results were obtained when both cannabinoids were combined. In conclusion, our results support the interest to continue investigating the combination of BCP and CBD to improve the therapeutic management of DS in relation with their disease- modifying properties.
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    Project number: 257
    La experiencia de la educación en la pandemia, una herramienta para el futuro
    (2023) Hernández Fisac, Inés; Navarro González De Mesa, Elisa; Sagredo Ezquioga, Onintza; Lago Femia, Eva De; Gómez Cañas, María; Rodríguez Cueto, Carmen Aurora; Gómez Ruiz, María Sagrario; Satta, Valentina; Ramírez Alcázar. María Ángeles; Sanz Zamora. Javier; Hernández Fisac, Inés
    Los últimos tres cursos académicos han quedado marcados, indudablemente, por la pandemia mundial que ha alterado el orden conocido a todos los niveles de nuestra vida, pero también ha cambiado la metodología docente, lo que ha supuesto un reto tanto para los docentes como para los alumnos se han enfrentado a ella. De esta forma, se han establecido puntos de partida para una nueva metodología de trabajo en la que los docentes nos enfrentamos a un alumnado cada vez más virtualizado. Nuestros alumnos han asumido las nuevas tecnologías y las redes sociales como parte de su rutina. De igual modo, su forma de aprender también ha cambiado. Esta virtualización del alumnado se ha producido en un momento que coexiste con un progresivo envejecimiento de la plantilla del profesorado. La plantilla PDI de la UCM, en el año 2021, tenía una edad media de 55,67 años, de los cuales, solo el 46% era personal permanente (según datos del Consejo de Gobierno de marzo de 2021). Esto significa que es una plantilla que irremediablemente tendrá que ser reemplazada, a corto plazo, por un gran número de nuevos docentes, sin el bagaje docente que dan los años de experiencia, pero con ideas frescas y nuevas que poner en marcha. Cómo se afronte esta nueva labor, será determinante para el futuro de nuestra Universidad. Nosotros nos proponemos realizar una reflexión y aprender de nuestra propia experiencia. A través del desarrollo de este proyecto queremos analizar cómo han afectado a los resultados académicos, los dos años de docencia virtual o semipresencial que hemos vivido. Pretendemos identificar las fortalezas de las medidas implementadas, pero también las carencias de un sistema que llegó de manera improvisada y, muchas veces, sin medios suficientes. Tanto el curso 2020-2021, como el curso 2021-2022 pusieron a prueba nuestra institución ya que nos enfrentamos al reto de asumir una docencia absoluta o parcialmente virtualizada. Proponemos un proyecto de innovación docente interfacultativo en el que pretendemos evaluar el efecto que ha tenido la situación pandémica global derivada de la COVID-19 sobre la docencia universitaria, enmarcada dentro de los departamentos de Bioquímica y Biología Molecular de la Facultad de Medicina y Psicobiología y Metodología en CIencias del Comportamiento, de la Facultad de Psicología. Esto nos permitirá buscar diferencias entre las medidas implementadas en diferentes centros y entre varios grados impartidos en el área de las Ciencias de la Salud, pero con un diferente componente práctico, como serían los grados de Medicina, Bioquímica, Fisiología, Podología o Psicología.