{"id":15069,"date":"2020-03-18T09:50:13","date_gmt":"2020-03-18T08:50:13","guid":{"rendered":"https:\/\/asscat-hepatitis.org\/?p=15069"},"modified":"2020-03-18T09:50:13","modified_gmt":"2020-03-18T08:50:13","slug":"identifiquen-factors-essencials-per-a-la-infeccio-cronica-per-hepatitis-b","status":"publish","type":"post","link":"https:\/\/asscat-hepatitis.org\/ca\/identifiquen-factors-essencials-per-a-la-infeccio-cronica-per-hepatitis-b\/","title":{"rendered":"Identifiquen factors essencials per a la infecci\u00f3 cr\u00f2nica per hepatitis B"},"content":{"rendered":"<p>[et_pb_section bb_built=&#8221;1&#8243; disabled_on=&#8221;off|off|off&#8221; _builder_version=&#8221;3.0.106&#8243; custom_margin=&#8221;|||&#8221; custom_padding=&#8221;0px||0px|&#8221; next_background_color=&#8221;#000000&#8243;][et_pb_row custom_padding=&#8221;0px||0px|&#8221; _builder_version=&#8221;3.0.106&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221;][et_pb_column type=&#8221;4_4&#8243;][et_pb_post_title author=&#8221;off&#8221; date_format=&#8221;d\/m\/Y&#8221; comments=&#8221;off&#8221; featured_placement=&#8221;background&#8221; text_background=&#8221;on&#8221; text_bg_color=&#8221;#ffffff&#8221; module_class=&#8221;ac-post-title-section-0&#8243; _builder_version=&#8221;3.0.106&#8243; title_font=&#8221;Montserrat|600|||||||&#8221; title_text_color=&#8221;#2d2d2d&#8221; title_letter_spacing=&#8221;-1px&#8221; title_line_height=&#8221;1.2em&#8221; meta_font=&#8221;Open Sans||||||||&#8221; meta_text_color=&#8221;rgba(45,45,45,0.5)&#8221; text_orientation=&#8221;center&#8221; custom_margin=&#8221;|||&#8221; custom_padding=&#8221;|20px|20px|20px&#8221; title_text_align=&#8221;center&#8221; meta_font_size=&#8221;13px&#8221; meta_text_align=&#8221;center&#8221;]<\/p>\n<p>&nbsp;<\/p>\n<p>[\/et_pb_post_title][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section bb_built=&#8221;1&#8243; specialty=&#8221;on&#8221; _builder_version=&#8221;3.0.106&#8243; custom_padding=&#8221;0px|||&#8221; prev_background_color=&#8221;#000000&#8243; next_background_color=&#8221;#000000&#8243;][et_pb_column type=&#8221;2_3&#8243; specialty_columns=&#8221;2&#8243;][et_pb_row_inner admin_label=&#8221;Fila&#8221; _builder_version=&#8221;3.0.106&#8243;][et_pb_column_inner type=&#8221;4_4&#8243; saved_specialty_column_type=&#8221;2_3&#8243;][et_pb_text admin_label=&#8221;Contenido Entrada 1&#8243; ul_type=&#8221;square&#8221; module_class=&#8221;ac-posts-content&#8221; _builder_version=&#8221;3.0.106&#8243; text_orientation=&#8221;justified&#8221; background_layout=&#8221;light&#8221;]<\/p>\n<h3>Investigadors de la Universitat de Princeton, als Estats Units, han identificat un conjunt de prote\u00efnes humanes que el virus de l\u2019hepatitis B (VHB) utilitza per establir-se de forma permanent dins de les c\u00e8l\u00b7lules hep\u00e0tiques, segons publiquen a la revista <em>Nature Microbiology<\/em>.<\/h3>\n<p>Aquest descobriment podria suggerir noves direccions per a les ter\u00e0pies per tractar la infecci\u00f3 cr\u00f2nica pel VHB, una malaltia que augmenta el risc de desenvolupar c\u00e0ncer de fetge i \u00e9s responsable de gaireb\u00e9 900.000 morts a tot el m\u00f3n cada any.<\/p>\n<h3>M\u00e9s de 250 milions de persones estan infectades cr\u00f2nicament amb el VHB<\/h3>\n<p>L\u2019afecci\u00f3 segueix sent incurable i els pacients actualment requereixen tractament de per vida amb medicaments antivirals que encara els deixen en un major risc de desenvolupar no nom\u00e9s c\u00e0ncer de fetge sin\u00f3 tamb\u00e9 altres malalties del fetge, inclosa la cirrosi hep\u00e0tica.<\/p>\n<p>Quan el VHB ingressa per primer cop a les c\u00e8l\u00b7lules hep\u00e0tiques del seu hoste, el seu genoma d\u2019ADN cont\u00e9 diversos buits i d\u2019altres imperfeccions que han de reparar-se abans que el virus pugui establir una infecci\u00f3 permanent.<\/p>\n<p>Per fer aix\u00f2, el VHB ha de comptar amb l\u2019ajuda de la maquin\u00e0ria de reparaci\u00f3 d\u2019ADN de la seva c\u00e8l\u00b7lula hoste, per\u00f2 exactament quins components d\u2019aquesta maquin\u00e0ria necessita el virus segueix sent un misteri durant d\u00e8cades.<\/p>\n<p>Per identificar els components necessaris per reparar l\u2019ADN del VHB, Alexander Ploss, professor associat de Biologia Molecular a Princeton, i el seu company postdoctoral Lei Wei, van recrear el proc\u00e9s en un tub d\u2019assaig.<\/p>\n<p><strong>Els investigadors van provar dotzenes de factors de reparaci\u00f3 d\u2019ADN i van descobrir que un conjunt de nom\u00e9s cinc factors purificats de c\u00e8l\u00b7lules humanes era suficient pel proc\u00e9s de reparaci\u00f3<\/strong><strong>. Eliminar fins i tot un d\u2019aquests cinc factors va evitar que el proc\u00e9s de reparaci\u00f3 es complet\u00e9s amb \u00e8xit, el que suggereix que atacar qualsevol d\u2019aquests cinc factors pot prevenir potencialment la infecci\u00f3 pel VHB.<\/strong><strong>\u00a0<\/strong><\/p>\n<p><strong>Un dels factors de reparaci\u00f3 essencials, un enzim conegut com ADN polimerada delta, \u00e9s inhibida per un medicament anomenat<\/strong> aphidicolina. Wei i Ploss van descobrir que el tractament amb afidicolina pot prevenir la reparaci\u00f3 de l\u2019ADN del VHB, no nom\u00e9s en el tub d\u2019assaig sin\u00f3 tamb\u00e9 en les c\u00e8l\u00b7lules hep\u00e0tiques infectades pel virus.<\/p>\n<p>Ploss espera que m\u00e9s estudis revelin exactament com els cinc factors de reparaci\u00f3 treballen junts per reparar el genoma del VHB.<\/p>\n<p><em>\u201cEl nostre estudi \u00e9s un excel\u00b7lent punt de partida per respondre finalment la pregunta de fa d\u00e8cades de com es genera la forma estable de l\u2019ADN del virus. <strong>Fins que comprenguem aquest proc\u00e9s, que \u00e9s crucial per a la persist\u00e8ncia del VHB, les ter\u00e0pies cl\u00edniques dirigides que poden eliminar completament la infecci\u00f3 romandran fora de l\u2019abast<\/strong>\u201d<\/em>, destaca Ploss.<\/p>\n<p>&nbsp;<\/p>\n<p>Font: <a href=\"https:\/\/m.infosalus.com\/salud-investigacion\/noticia-identifican-factores-esenciales-infeccion-cronica-hepatitis-20200310074437.html\">infosalus.com<\/a><\/p>\n<p>Not\u00edcia tradu\u00efda per l\u2019ASSCAT<\/p>\n<p>[\/et_pb_text][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner admin_label=&#8221;Fila&#8221; custom_padding=&#8221;0px|||&#8221; _builder_version=&#8221;3.0.105&#8243; custom_margin=&#8221;|||&#8221;][et_pb_column_inner type=&#8221;4_4&#8243; saved_specialty_column_type=&#8221;2_3&#8243;][et_pb_post_title admin_label=&#8221;Metadatos &#8211; Fecha \u00daltima actualizaci\u00f3n&#8221; title=&#8221;off&#8221; author=&#8221;off&#8221; date_format=&#8221;d\/m\/Y&#8221; categories=&#8221;off&#8221; comments=&#8221;off&#8221; featured_image=&#8221;off&#8221; _builder_version=&#8221;3.0.106&#8243; title_text_align=&#8221;left&#8221; meta_font=&#8221;Open Sans||||||||&#8221; meta_text_align=&#8221;left&#8221; meta_font_size=&#8221;13px&#8221; meta_text_color=&#8221;#0082ca&#8221; border_width_top=&#8221;1px&#8221; border_color_top=&#8221;#cccccc&#8221; custom_margin=&#8221;50px|||&#8221; custom_padding=&#8221;10px|||&#8221; custom_css_before=&#8221;content:%22\u00daltima actualizaci\u00f3n:%22;&#8221; global_module=&#8221;3449&#8243; saved_tabs=&#8221;all&#8221;]<\/p>\n<p>&nbsp;<\/p>\n<p>[\/et_pb_post_title][\/et_pb_column_inner][\/et_pb_row_inner][\/et_pb_column][et_pb_column type=&#8221;1_3&#8243;][et_pb_sidebar orientation=&#8221;right&#8221; area=&#8221;et_pb_widget_area_8&#8243; module_class=&#8221;ac-posts-sidebar&#8221; _builder_version=&#8221;3.0.106&#8243; global_module=&#8221;3198&#8243; saved_tabs=&#8221;all&#8221;]<\/p>\n<p>&nbsp;<\/p>\n<p>[\/et_pb_sidebar][\/et_pb_column][\/et_pb_section][et_pb_section bb_built=&#8221;1&#8243; _builder_version=&#8221;3.0.106&#8243; custom_padding=&#8221;||0px|&#8221; prev_background_color=&#8221;#000000&#8243; module_class=&#8221;ac-post-section-share-rrss&#8221;][et_pb_row custom_padding=&#8221;||0px|&#8221; custom_margin=&#8221;|||&#8221; _builder_version=&#8221;3.0.105&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221;][et_pb_column type=&#8221;4_4&#8243;][et_pb_divider color=&#8221;#e20611&#8243; show_divider=&#8221;on&#8221; divider_style=&#8221;ridge&#8221; _builder_version=&#8221;3.0.106&#8243; \/][et_pb_text _builder_version=&#8221;3.0.106&#8243; text_font=&#8221;Montserrat||||||||&#8221; text_text_color=&#8221;#e20611&#8243; text_orientation=&#8221;center&#8221; custom_margin=&#8221;||0px|&#8221; custom_padding=&#8221;|||&#8221; background_layout=&#8221;light&#8221; disabled=&#8221;on&#8221;]<\/p>\n<h5>Desde aqu\u00ed puedes compartir esta publicaci\u00f3n. \u00a1Gracias!<\/h5>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n<!-- Begin Yuzo --><div class='yuzo_related_post style-1'  data-version='5.12.77'><!-- without result --><div class='yuzo_clearfixed yuzo__title yuzo__title'><h3>Related Post<\/h3><\/div>\n\t\t\t\t\t\t  <div class=\"relatedthumb \" style=\"width:125px;float:left;overflow:hidden;\">  \n\t\t\t\t\t\t\t  \n\t\t\t\t\t\t\t  <a  href=\"https:\/\/asscat-hepatitis.org\/ca\/els-antivirals-contra-el-vhb-en-les-embarassades-que-els-necessiten-son-mes-comunament-prescrits-per-gastroenterolegs-i-hepatolegs\/\"  >\n\t\t\t\t\t\t\t\t\t  <div class=\"yuzo-img-wrap \" style=\"width: 125px;height:90px;\">\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<div class=\"yuzo-img\" style=\"background:url('https:\/\/asscat-hepatitis.org\/wp-content\/uploads\/VHB-150x150.jpg') 50% 50% no-repeat;width: 125px;height:90px;margin-bottom: 5px;background-size: cover; 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