Person: Maldonado Bautista, Estela
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First Name
Estela
Last Name
Maldonado Bautista
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Medicina
Department
Anatomía y Embriología
Area
Anatomía y Embriología Humana
Identifiers
13 results
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Item Connections between the internal and the external capsules and the globus pallidus in the sheep: A dichromate stain X‐ray microtomographic study(Anatomia Histologia Embryologia, 2020) Murillo González, Jorge Alfonso; Notario, Belen; Maldonado Bautista, Estela; Martínez Sanz, Elena; Barrio Asensio, María Del Carmen; Herrera Lara, Manuel EugenioSheep are recognized as useful species for translational neurodegeneration research, in particular for the study of Huntington disease. There is a lack of information regarding the detailed anatomy and connections of the basal ganglia of sheep, in normal myeloarchitectonics and in tract-tracing studies. In this work, the organization of the corticostriatal projections at the level of the putamen and globus pallidus (GP) are explored. For the first time, the myeloarchitectonic pattern of connections between the internal (IC) and the external (EC) capsules with the GP have been investigated in the sheep. Formaldehyde-fixed blocks of the striatum were treated with a metallic stain containing potassium dichromate and visualized using micro-CT (µ-CT). The trivalent chromium (Cr3+), attached to myelin phospholipids, imparts a differential contrast to the grey and white matter compartments, which allows the visualization of myelinated fascicles in µ-CT images. The fascicles were classified according to their topographical location in dorsal supreme fascicles (X, Y, apex) arising from the IC and EC; pre-commissurally, basal fascicles connecting the ventral part of the EC with the lateral zone of the ventral pallidum (VP) and, post-commissurally, superior (Z1 ), middle (Z2 ) and lower (Z3 ) fascicles, connecting at different levels the EC with the GP. The results suggest that the presumptive cortical efferent and afferent fibres to the pallidum could be organized according to a dorsal to ventrolateral topography in the sheep, similar to that seen in other mammals. The proposed methodology has the potential to delineate the myeloarchitectonic patterns of nervous systems and tracts.Item Occurrence of cleft-palate and alteration of Tgf-β3 expression and the mechanisms leading to palatal fusion in mice following dietary folic-acid deficiency(Cells Tissues Organs, 2011) Maldonado Bautista, Estela; Murillo González, Jorge Alfonso; Barrio Asensio, María Del Carmen; Río Sevilla, Aurora Del; Pérez De Miguelsanz, María Juliana; López Gordillo, Yamila; Partearroyo, Teresa; Paradas Lara, Irene; Maestro De Las Casas, María Del Carmen; Martínez Sanz, Elena; Varela Moreiras, Gregorio; Martínez Álvarez, María ConcepciónFolic acid (FA) is essential for numerous bodily functions. Its decrease during pregnancy has been associated with an increased risk of congenital malformations in the progeny. The relationship between FA deficiency and the appearance of cleft palate (CP) is controversial, and little information exists on a possible effect of FA on palate development. We investigated the effect of a 2–8 weeks’ induced FA deficiency in female mice on the development of CP in their progeny as well as the mechanisms leading to palatal fusion, i.e. cell proliferation, cell death, and palatal-shelf adhesion and fusion. We showed that an 8 weeks’ maternal FA deficiency caused complete CP in the fetuses although a 2 weeks’ maternal FA deficiency was enough to alter all the mechanisms analyzed. Since transforming growth factor beta 3 (TGF-β3) is crucial for palatal fusion and since most of the mechanisms impaired by FA deficiency were also observed in the palates of Tgf-β3 null mutant mice, we investigated the presence of TGF-beta 3 mRNA, its protein and phospho-SMAD2 in FA-deficient (FAD) mouse palates. Our results evidenced a large reduction in Tgf-β3 expression in palates of embryos of dams fed an FAD diet for 8 weeks; Tgf-β3 expression was less reduced in palates of embryos of dams fed an FAD diet for 2 weeks. Addition of Tgf-β3 to palatal-shelf cultures of embryos of dams fed an FAD diet for 2 weeks normalized all the altered mechanisms. Thus, an insufficient folate status may be a risk factor for the development of CP in mice, and exogenous Tgf-β3 compensates this deficit in vitro.Item Adaptaciones de la Enseñanza Anatómica Durante el COVID-19 en la Universidad Complutense de Madrid. Evaluación de los Estudiantes(International Journal of Morphology, 2023) Maldonado Bautista, Estela; García De Pereda Notario, Carlos Miguel; Martínez Sanz, Elena; García Gómez, Susana; Murillo González, Jorge Alfonso; Barrio Asensio, María Del Carmen; Virto Ruiz, Leire; García Serradilla, Moisés; Mérida Velasco, José Ramón; Arráez Aybar, Luis AlfonsoLas restricciones por la pandemia del COVID-19 supusieron la transición abrupta a una enseñanza online tanto del contenido teórico como práctico y de la evaluación final de las asignaturas que imparte el departamento en varias titulaciones. En previsión de que el siguiente curso académico 2020-21 se vería totalmente afectado, se desarrollaron una serie de materiales didácticos propios, como la elaboración de guiones de teoría y práctica que incorporaron imágenes de modelos anatómicos, prosecciones, anatomía radiológica y anatomía ecográfica. La percepción de esta innovación fue evaluada por los estudiantes a través de una encuesta en línea y sus respuestas mediante una escala tipo Likert. Participaron 346 estudiantes de las titulaciones de Fisioterapia (n= 66), Medicina (n= 169), Podología (n= 44) y Terapia Ocupacional (n= 67). Las puntuaciones medias más altas correspondieron a los estudiantes de Podología y Terapia Ocupacional, ambas presentaron diferencias significativas con los otros tres subgrupos de alumnos (p<.0001). El puntaje promedio más bajo correspondió a los estudiantes de Medicina de segundo año académico que presentó significancia con los otros cuatro subgrupos de estudiantes (p<.0001). Se analizaron las carencias del sistema educativo en la Universidad Complutense de Madrid reveladas por la pandemia del Covid19. Esta crisis ha puesto de manifiesto la necesidad de que los educadores médicos en general y los anatomistas en particular estén capacitados en el uso de la tecnología disponible y en la creación de sus propios materiales didácticos multimedia.Item Study of the functional relationships between the buccinator muscle and the connective tissue of the cheek in humans(Annals of Anatomy, 2022) Martínez Sanz, Elena; Catón Vázquez, Francisco Javier; Maldonado Bautista, Estela; Murillo González, Jorge Alfonso; Barrio Asensio, María Del Carmen; Paradas Lara, Irene; García Serradilla, Moisés; Arráez Aybar, Luis Alfonso; Mérida Velasco, José RamónBackground: The buccinator muscle derives from the mesenchyme of the second pharyngeal arch. In adults, it has a quadrilateral shape, occupying the deepest part of the cheek region. Its function is complex, being active during swallowing, chewing, and sucking. To our knowledge, there are no studies that have specifically analyzed the relationship of the buccinator muscle fibers and neighboring connective tissue of the cheek in humans, neither during development nor in adults. Such relationships are fundamental to understand its function. Thus, in this study the relations of the buccinator muscle with associated connective tissue were investigated. Methods: The buccinator muscle region was investigated bilaterally in 41 human specimens of 8–17 weeks of development. Moreover, four complete adult tissue blocks from human cadavers (including mucosa and skin) were obtained from the cheek region (between the anterior border of the masseter muscle and the nasolabial fold). All samples were processed with standard histological techniques. In addition, subsets of sections were stained with picrosirius red (PSR). Furthermore, immunoreactivity against type I and III collagen was also studied in adult tissues. Results: The buccinator muscle showed direct relationships with its connective tissue from 8 to 17 weeks of development. Collagen fibers were arranged in septa from the submucosa to the skin through the muscle. These septa were positive for type I collagen and presented elastic fibers. Fibrous septa that were positive for type III collagen were arranged from the lateral side of the muscle to the skin. Conclusions: The intimate relationship between buccinator muscle fibers and cheek connective tissue may explain the complex functions of this muscle.Item Epidermal Growth Factor Impairs Palatal Shelf Adhesion and Fusion in the T gf-β3 Null Mutant(Cells Tissues Organs, 2014) Barrio Asensio, María Del Carmen; Río Sevilla, Aurora Del; Murillo González, Jorge Alfonso; Maldonado Bautista, Estela; López Gordillo, Yamila; Paradas Lara, Irene; Hernandes, Luzmarina; Catón Vázquez, Javier; Martínez Álvarez, ConcepciónThe cleft palate presented by transforming growth factor-β3 (Tgf-β3 ) null mutant mice is caused by altered palatal shelf adhesion, cell proliferation, epithelial-to-mesenchymal transformation and cell death. The expression of epidermal growth factor (EGF), transforming growth factor-β1 ( Tgf-β1 ) and muscle segment homeobox-1 (Msx-1) is modified in the palates of these knockout mice, and the cell proliferation defect is caused by the change in EGF expression. In this study, we aimed to determine whether this change in EGF expression has any effect on the other mechanisms altered in Tgf-β 3 knockout mouse palates. We tested the effect of inhibiting EGF activity in vitro in the knockout palates via the addition of Tyrphostin AG 1478. We also investigated possible interactions between EGF, Tgf-β 1 and Msx-1 in Tgf-β 3 null mouse palate cultures. The results show that the inhibition of EGF activity in Tgf-β 3 null mouse palate cultures improves palatal shelf adhesion and fusion, with a particular effect on cell death, and restores the normal distribution pattern of Msx-1 in the palatal esenchyme. Inhibition of TGF-β 1 does not affect either EGF or Msx-1 expression.- Project number: 114
Item Desarrollo de un sistema interactivo para el estudio de la órbita y su contenido: anatomía microscópica(2022) Barrio Asensio, María Del Carmen; Arráez Aybar, Luis Alfonso; Catón Vázquez, Francisco Javier; García Serradilla, Moisés; García-Mauriño Múzquiz, José Enrique; Maldonado Bautista, Estela; Martínez Sanz, Elena; Mérida Velasco, José Ramón; Murillo Barrio, Jaime; Murillo González, Jorge Alfonso; Paradas Lara, IreneSe ha desarrollado un sistema interactivo para mejorar el proceso de enseñanza-aprendizaje en la docencia de la anatomía microscópica de la órbita y su contenido, a través de preparaciones histológicas. Se pretende facilitar el aprendizaje de forma autónoma en español e inglés y, la autoevaluación sobre los conocimientos adquiridos. Item Gestational folic acid deficiency alters embryonic eye development: Possible role of basement membrane proteins in eye malformations.(Nutrition, 2021) Sijilmassi, Ouafa; Río Sevilla, Aurora Del; Maldonado Bautista, Estela; Barrio Asensio, María Del CarmenObjectives: Folic acid (FA) is crucial before and during early pregnancy. FA deficiency can occur because dietary FA intake is low in mothers at the time of conception. Likewise, various ocular pathologies are related to the alteration of extracellular matrices. The present study aimed to investigate the association between maternal FA deficiency and congenital eye defects. We also investigated whether maternal diet deficient in FA alters the expression of collagen IV and laminin-1 as a possible mechanism responsible for the appearance of ocular malformations. Both proteins are the main components of the basal lamina, and form an interlaced network that creates a relevant scaffold basement membrane. Basal laminae are involved in tissues maintenance and implicated in regulating many cellular processes. Methods: A total of 57 mouse embryos were classified into the following groups: Control group, (mothers were fed a standard rodent diet), and D2 and D8 groups (mothers were fed FA-deficient [FAD] diet for 2 or 8 wk, respectively). Female mice from group D2 were fed a FAD diet (0 mg/kg diet + 1% succinyl sulfathiazole used to block the synthesis of FA) for 2 wk from the day after mating until day 14.5 of gestation (E14.5). On the other hand, female mice from group D8 were fed a FAD diet for 8 wk (6 wk before conception and during the first 2 wk of pregnancy). For the data analysis, we first estimated the incidence of malformations in each group. Then, the statistical analysis was performed using IBM SPSS Statistics, version 25.0. Expression patterns of collagen IV and laminin-1 were examined with the immunohistochemical technique. Results: Our results showed that mice born to FA-deficient mothers had several congenital eye abnormalities. Embryos from dams fed a short-term FAD diet were found to have many significant abnormalities in both anterior and posterior segments, as well as choroidal vessel abnormalities. However, embryos from dams fed a long-term FAD diet had a significantly higher incidence of eye defects. Finally, maternal FA deficiency increased the expression of both collagen IV and laminin-1. Likewise, changes in the spatial localization and organization of collagen IV were observed. Conclusions: A maternal FAD diet for a short-term period causes eye developmental defects and induces overexpression of both collagen IV and laminin-1. The malformations observed are probably related to alterations in the expression of basement membrane proteins.- Project number: 79
Item Programación infográfica para la representación de los huesos y articulaciones del miembro inferior(2021) Martínez Sanz, Elena; Murillo González, Jorge Alfonso; Arráez Aybar, Luis Alfonso; Barrio Asensio, María Del Carmen; Herrera Lara, Manuel Eugenio; Cabrera Parra, Walter; Dorado Fernández, Enrique; Maldonado Bautista, Estela; Mérida Velasco, José Ramón; Catón Vázquez, Francisco Javier; Cuadra Blanco, Crótida de la; Garcia Gómez, Susana; Becerro de Bengoa Vallejo, RicardoDesarrollo de una infografía con los huesos y articulaciones del miembro inferior para mejorar el proceso de enseñanza-aprendizaje en la docencia de la anatomía topográfica de estas estructuras a través del campus virtual (Grados de CC. de la Salud). - Project number: 419
Item Tomando medidas ante la COVID-19: Virtualización de las prácticas de Aparato Locomotor en las asignaturas que imparte el Departamento de Anatomía y Embriología en las titulaciones de Medicina, Fisioterapia, Podología y Terapia Ocupacional(2022) Arráez Aybar, Luis Alfonso; Barrio Asensio, María Del Carmen; Catón Vázquez, Francisco Javier; Cuadra Blanco, Crótida de la; Garcia Gómez, Susana; Maldonado Bautista, Estela; Martínez Sanz, Elena; Mérida Velasco, José Ramón; Murillo González, Jorge Alfonso; Quirós Terrón, Luis; Sanz Casado, José Vicentedesarrollo de un sistema interactivo para mejorar el proceso de enseñanza-aprendizaje en la docencia de las prácticas del Aparato Locomotor, que pudiera ser utilizado por los alumnos de Grado de Fisioterapia, Medicina, Podología y Terapia Ocupacional, titulaciones en las que el Aparato Locomotor tiene una importante presencia en sus temarios de prácticas. Item Alteration of medial-edge epithelium cell adhesion in two Tgf-beta3 null mouse strains(Differentiation, 2008) Martínez Sanz, Elena; Río Sevilla, Aurora Del; Barrio Asensio, María Del Carmen; Maldonado Bautista, Estela; Murillo González, Jorge Alfonso; Garcillán, B; Amorós, M; Fuerte, T; Fernández, A; Trinidad, E; Rabadán, MA; López, Y; Martínez Salmeán, María Luisa; Martínez Álvarez, María ConcepciónAlthough palatal shelf adhesion is a crucial event during palate development, little work has been carried out to determine which molecules are responsible for this process. Furthermore, whether altered palatal shelf adhesion causes the cleft palate presented by Tgf-b3 null mutant mice has not yet been clarified. Here, we study the presence/distribution of some extracellular matrix and cell adhesion molecules at the time of the contact of palatal shelves in both wild-type and Tgf-b3 null mutant palates of two strains of mice (C57/BL/6J(C57), and MF1) that develop cleft palates of different severity. We have performed immunohistochemistry with antibodies against collagens IV and IX, laminin, fibronectin, the a5- and b1-integrins, and ICAM-1; in situ hybridization with a Nectin-1 riboprobe; and palatal shelf cultures treated or untreated with TGF-b3 or neutralizing antibodies against fibronectin or the a5-integrin. Our results show the location of these molecules in the wild-type mouse medial edge epithelium (MEE) of both strains at the time of the contact of palatal shelves; the heavier (C57) and milder (MF1) alteration of their presence in the Tgf-b3 null mutants; the importance of TGF-b3 to restore their normal pattern of expression; and the crucial role of fibronectin and the a5-integrin in palatal shelf adhesion. We thus provide insight into the molecular bases of this important process and the cleft palate presented by Tgf-b3 null mutant mice.