{"id":17022,"date":"2020-09-08T12:09:00","date_gmt":"2020-09-08T10:09:00","guid":{"rendered":"https:\/\/asscat-hepatitis.org\/?p=17022"},"modified":"2020-09-08T12:09:00","modified_gmt":"2020-09-08T10:09:00","slug":"espanya-signa-el-primer-mapa-genetic-del-tipus-mes-comu-dhepatitis-c","status":"publish","type":"post","link":"https:\/\/asscat-hepatitis.org\/ca\/espanya-signa-el-primer-mapa-genetic-del-tipus-mes-comu-dhepatitis-c\/","title":{"rendered":"Espanya signa el primer mapa gen\u00e8tic del tipus m\u00e9s com\u00fa d\u2019hepatitis C"},"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; _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; next_background_color=&#8221;#000000&#8243;][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][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;][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>L\u2019ha desenvolupat l\u2019equip del Centre Nacional de Microbiologia de l\u2019ISCIII per facilitar la seva investigaci\u00f3.<\/h3>\n<p>Un\u00a0<strong>equip de cient\u00edfics del Laboratori d\u2019Hepatitis Virals al Centre Nacional de Microbiologia de l\u2019ISCIII\u00a0<\/strong>ha publicat la primera descripci\u00f3 de l\u2019origen, epidemiologia, transmissi\u00f3 i diversitat a Espanya del genotip m\u00e9s com\u00fa del virus de l\u2019hepatitis C (VHC), el que permet explicar les diferents resist\u00e8ncies al tractament amb els nous antivirals d\u2019acci\u00f3 directa segons el tipus de virus que causa la infecci\u00f3.<\/p>\n<p>L\u2019estudi, que s\u2019ha publicat a<em><u>\u00a0Scientific Reports<\/u><\/em>, ha estudiat mitjan\u00e7ant una enquesta i an\u00e0lisis gen\u00f2miques a 588 pacients amb el <strong>genotip 1\u00aa de l\u2019hepatitis C a Espanya<\/strong>,\u00a0incloent a persones coinfectades amb VIH. Es coneixen fins a vuit genotips (\u2018tipus\u2019 de virus amb caracter\u00edstiques gen\u00e8tiques diferents) del virus de l\u2019hepatitis C, un dels quals major variabilitat gen\u00e8tica mostra, i entre ells el GT1a \u00e9s el m\u00e9s com\u00fa entre els afectats. A m\u00e9s, tamb\u00e9 \u00e9s el <strong>m\u00e9s com\u00fa entre els pacients amb VHC coinfectats amb VIH.<\/strong><\/p>\n<p>La infecci\u00f3 pel VHC \u00e9s la major causa de mortalitat a Espanya entre les malalties infeccioses. El genotip 1 \u00e9s responsable del <strong>67% d\u2019infeccions<\/strong> i, dins d\u2019aquestes, el genotip 1a \u00e9s el m\u00e9s com\u00fa i \u00e9s responsable del 40%.<\/p>\n<p>Gr\u00e0cies a <strong>an\u00e0lisis gen\u00f2miques i filogen\u00e8tiques<\/strong>, l\u2019equip del Laboratori d\u2019Hepatitis Virals del CNM-ISCIII, liderat per Ver\u00f3nica Briz, ha descobert que el clado II del VHC \u00e9s molt m\u00e9s prevalent que el clado I (82,3% i 17,7%, respectivament). Els clados s\u00f3n com \u2018fam\u00edlies\u2019 dins dels virus que mostren diferents mutacions i que ajuden a explicar el seu origen, distribuci\u00f3 i influ\u00e8ncia.<\/p>\n<p>La investigaci\u00f3 tamb\u00e9 va demostrar que el clado II t\u00e9 un origen m\u00e9s antic (s\u2019estima que va sorgir cap al 1912) que el clado I (el seu origen es calcula cap al 1952). El treball, en el qual tamb\u00e9 participen cient\u00edfics de la <strong>Universitat de Lisboa<\/strong>, senyala que el clado II est\u00e0 epid\u00e8micament en declivi, mentre que el clado I mostra una pres\u00e8ncia estable.<\/p>\n<p>Els autors han trobat fins a 58 substitucions associades a resist\u00e8ncia al tractament amb nous antivirals d\u2019<strong>acci\u00f3 directa a la prote\u00efna viral NS5A<\/strong>, la diana a la qual es dirigeixen molts d\u2019aquests f\u00e0rmacs apareguts en els \u00faltims anys, com elbasvir, el m\u00e9s estudiat per l\u2019equip liderat per Briz.<\/p>\n<h3>Els autors han localitzat m\u00e9s de 13.000 mutacions diferents<\/h3>\n<p>Els resultats mostren que hi ha tretze regions gen\u00e8tiques en les quals s\u2019observen importants percentatges de resist\u00e8ncia front a les noves ter\u00e0pies (entre el 5% i el 15%), i una altra regi\u00f3 en la qual aquesta resist\u00e8ncia \u00e9s encara major (del 20%). Els autors han localitzat m\u00e9s de <strong>13.000 mutacions diferents, de les quals 8.602 es consideren polimorfismes<\/strong>, que permeten esbossar una classificaci\u00f3 de pacients segons el tipus de virus, genotip i clado responsable de la infecci\u00f3, i establir com s\u00f3n les resist\u00e8ncies al tractament segons el tipus de nou antiviral i les caracter\u00edstiques gen\u00e8tiques de cada infecci\u00f3.<\/p>\n<p>Epid\u00e8micament parlant, la pres\u00e8ncia del genotip GT1a del VHC actualment a Espanya correspon al clado I, que mostra diferents rutes de disseminaci\u00f3 geogr\u00e0fica en comparaci\u00f3 amb les del clado II. A m\u00e9s, les resist\u00e8ncies als tractaments mostren difer\u00e8ncies relacionades amb aquesta diferent distribuci\u00f3 dels clados del VHC, el que podria definir <strong>patrons d\u2019efic\u00e0cia terap\u00e8utica<\/strong> dels nous antivirals segons les caracter\u00edstiques gen\u00e8tiques de la infecci\u00f3 per VHC que pateixi cada pacient.<\/p>\n<p>En definitiva, l\u2019estudi aporta el <strong>primer mapa de la distribuci\u00f3 i variabilitat gen\u00e8tica\u00a0<\/strong>del genotip m\u00e9s com\u00fa del VHC a Espanya, un coneixement que, si es desenvolupa, pot facilitar la selecci\u00f3 de tractaments segons les caracter\u00edstiques gen\u00f2miques de la infecci\u00f3 viral.<\/p>\n<p>&nbsp;<\/p>\n<p>Font: <a href=\"https:\/\/www.redaccionmedica.com\/secciones\/aparato-digestivo\/hepatologia\/espana-firma-el-primer-mapa-genetico-del-tipo-mas-comun-de-hepatitis-c-4720\">redaccionmedica.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; 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