{"id":69656,"date":"2018-03-09T23:14:09","date_gmt":"2018-03-09T23:14:09","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/efecto-del-envejecimiento-y-de-la-exposicion-a-fotoperiodo-corto-en-el-epitelio-seminifero-de-hamster-mesocricetus-auratus-proliferacion-y-apoptosis-vias-moleculares-de-la-apoptosis\/"},"modified":"2018-03-09T23:14:09","modified_gmt":"2018-03-09T23:14:09","slug":"efecto-del-envejecimiento-y-de-la-exposicion-a-fotoperiodo-corto-en-el-epitelio-seminifero-de-hamster-mesocricetus-auratus-proliferacion-y-apoptosis-vias-moleculares-de-la-apoptosis","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/murcia\/efecto-del-envejecimiento-y-de-la-exposicion-a-fotoperiodo-corto-en-el-epitelio-seminifero-de-hamster-mesocricetus-auratus-proliferacion-y-apoptosis-vias-moleculares-de-la-apoptosis\/","title":{"rendered":"Efecto del envejecimiento y de la exposicion a fotoperiodo corto en el epitelio seminifero de hamster (mesocricetus auratus). proliferacion y apoptosis. vias moleculares de la apoptosis."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Eva Morales Bartolome <\/strong><\/h2>\n<p>Los objetivos de la presente tesis doctoral son: a) estudiar el efecto del envejecimiento y de la exposici\u00f3n a fotoperiodo corto sobre los procesos de proliferaci\u00f3n y apoptosis en el epitelio semin\u00edfero de h\u00e1mster (mesocricetus auratus) mediante el uso de t\u00e9cnicas de brdu, detecci\u00f3n \u00abin situ\u00bb de c\u00e9lulas apopt\u00f3ticas (tunel) y microscop\u00eda electr\u00f3nica, y b) analizar las v\u00edas moleculares de la apoptosis de las c\u00e9lulas germinales mediante inmunohistoqu\u00edmica y western blot en ambos modelos de atrofia del epitelio semin\u00edfero.  nuestros resultados indican que la apoptosis constituye un mecanismo de eliminaci\u00f3n de c\u00e9lulas germinales testiculares en el h\u00e1mster joven, envejecido y expuesto a fotoperiodo corto. Morfol\u00f3gicamente las c\u00e9lulas germinales en apoptosis se caracterizan por la condensaci\u00f3n y marginaci\u00f3n de la cromatina hacia la periferia nuclear y la fragmentaci\u00f3n del n\u00facleo.  el envejecimiento en el h\u00e1mster provoca una disminuci\u00f3n significativa del porcentaje de espermatogonias (sg) en proliferaci\u00f3n (p menor que 0,05), y un incremento significativo del porcentaje de espermatogonias (p menor que 0,05)y espermatocitos (sc) primarios en apoptosis (p menor que 0,05). El porcentaje de espermatogonias en proliferaci\u00f3n desciende significativamente en los animales envejecidos respecto a los animales j\u00f3venes en los estadios vii-viii del ciclo del epitelio seminifero (p menor que 0,05). La actividad apost\u00f3lica global (porcentaje de sg+sc apopt\u00f3ticos) del epitelio seminifero del h\u00e1mster se incrementa significativamente  con el envejecimiento respecto a animales j\u00f3venes en los estadios i-iv y v-vi (p menor que 0,05). Con la edad se produce un incremento significativo del porcentaje de sc apopt\u00f3ticos en fase de preleptotene y paquitene (p menor que 0,05), no afect\u00e1ndose los espermatocitos en leptotene-zigotene. El porcentaje de paquitenes en apoptosis es superior en los estadios i-iv, v-vi y vii-viii (p menor que 0,05)<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Efecto del envejecimiento y de la exposicion a fotoperiodo corto en el epitelio seminifero de hamster (mesocricetus auratus). proliferacion y apoptosis. vias moleculares de la apoptosis.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Efecto del envejecimiento y de la exposicion a fotoperiodo corto en el epitelio seminifero de hamster (mesocricetus auratus). proliferacion y apoptosis. vias moleculares de la apoptosis. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Eva Morales Bartolome <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Murcia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 23\/07\/2004<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Luis Miguel Pastor Garcia<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: ricardo Paniagua g\u00f3mez-\u00e1lvarez <\/li>\n<li>sergi Bonet marull (vocal)<\/li>\n<li>Emilio Martinez garcia (vocal)<\/li>\n<li>alfonso Calvo gonzalez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Eva Morales Bartolome Los objetivos de la presente tesis doctoral son: a) estudiar el efecto del envejecimiento [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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