{"id":1490,"date":"2020-09-08T00:00:00","date_gmt":"2020-09-08T03:00:00","guid":{"rendered":"https:\/\/www.blogs.unicamp.br\/linhadefundo\/?p=1490"},"modified":"2020-09-08T00:00:00","modified_gmt":"2020-09-08T03:00:00","slug":"covid-19-um-exercito-invisivel-combatendo-a-doenca","status":"publish","type":"post","link":"https:\/\/www.blogs.unicamp.br\/linhadefundo\/2020\/09\/08\/covid-19-um-exercito-invisivel-combatendo-a-doenca\/","title":{"rendered":"Covid-19: um ex\u00e9rcito invis\u00edvel combatendo a doen\u00e7a!"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; fullwidth=&#8221;on&#8221; admin_label=&#8221;cabecalho&#8221; _builder_version=&#8221;4.4.6&#8243; background_color=&#8221;#ffc723&#8243; saved_tabs=&#8221;all&#8221;][et_pb_fullwidth_header title=&#8221;Cap\u00edtulo 21&#8243; subhead=&#8221;@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90aXRsZSIsInNldHRpbmdzIjp7ImJlZm9yZSI6IiIsImFmdGVyIjoiIn19@&#8221; text_orientation=&#8221;center&#8221; button_one_text=&#8221;@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9jYXRlZ29yaWVzIiwic2V0dGluZ3MiOnsiYmVmb3JlIjoiIiwiYWZ0ZXIiOiIiLCJsaW5rX3RvX3Rlcm1fcGFnZSI6Im9uIiwic2VwYXJhdG9yIjoiIHwgIiwiY2F0ZWdvcnlfdHlwZSI6ImNhdGVnb3J5In19@&#8221; logo_image_url=&#8221;https:\/\/www.blogs.unicamp.br\/linhadefundo\/wp-content\/uploads\/sites\/268\/2021\/12\/ENAtivo-2-e1639529384415.png&#8221; content_max_width_tablet=&#8221;&#8221; content_max_width_phone=&#8221;&#8221; content_max_width_last_edited=&#8221;on|phone&#8221; admin_label=&#8221;T\u00cdTULO&#8221; _builder_version=&#8221;4.4.6&#8243; _dynamic_attributes=&#8221;title,button_one_text,subhead&#8221; title_font=&#8221;Aclonica||||||||&#8221; title_text_align=&#8221;center&#8221; title_text_color=&#8221;#ff5413&#8243; title_font_size=&#8221;25px&#8221; content_text_color=&#8221;#100617&#8243; subhead_font=&#8221;Aclonica||||||||&#8221; subhead_text_color=&#8221;#000b1c&#8221; subhead_font_size=&#8221;40px&#8221; subhead_line_height=&#8221;1.1em&#8221; background_color=&#8221;#ffc723&#8243; custom_button_one=&#8221;on&#8221; button_one_text_color=&#8221;#ff5413&#8243; button_one_icon=&#8221;%%36%%&#8221; custom_margin=&#8221;||||false|false&#8221; custom_margin_tablet=&#8221;&#8221; custom_margin_phone=&#8221;&#8221; custom_margin_last_edited=&#8221;on|phone&#8221; custom_padding=&#8221;0px||0px||false|false&#8221; custom_padding_tablet=&#8221;&#8221; custom_padding_phone=&#8221;&#8221; custom_padding_last_edited=&#8221;on|desktop&#8221; title_font_size_last_edited=&#8221;off|phone&#8221; subhead_font_size_tablet=&#8221;&#8221; subhead_font_size_phone=&#8221;25px&#8221; subhead_font_size_last_edited=&#8221;on|phone&#8221; border_color_all_image=&#8221;#100617&#8243; title__hover_enabled=&#8221;on|desktop&#8221;]<\/p>\n<p><span style=\"font-weight: 400\">p.150-155<\/span><\/p>\n<p>[\/et_pb_fullwidth_header][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;meta&#8221; _builder_version=&#8221;4.4.6&#8243; background_color=&#8221;#eeeeee&#8221; background_enable_image=&#8221;off&#8221; parallax=&#8221;on&#8221; min_height=&#8221;618px&#8221; max_height=&#8221;672px&#8221; max_height_tablet=&#8221;1000px&#8221; max_height_phone=&#8221;&#8221; max_height_last_edited=&#8221;on|phone&#8221; custom_margin=&#8221;||-1px|||&#8221; custom_margin_tablet=&#8221;&#8221; custom_margin_phone=&#8221;&#8221; custom_margin_last_edited=&#8221;on|phone&#8221; custom_padding=&#8221;||8px|||&#8221; top_divider_style=&#8221;slant2&#8243; top_divider_color=&#8221;#ffc723&#8243; top_divider_flip=&#8221;vertical&#8221; top_divider_height_tablet=&#8221;72px&#8221; top_divider_height_phone=&#8221;40px&#8221; top_divider_height_last_edited=&#8221;on|desktop&#8221;][et_pb_row admin_label=&#8221;faixa bege&#8221; _builder_version=&#8221;4.4.6&#8243; custom_margin_tablet=&#8221;&#8221; custom_margin_phone=&#8221;&#8221; custom_margin_last_edited=&#8221;on|desktop&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.4.6&#8243;][et_pb_text admin_label=&#8221;data e autores&#8221; _builder_version=&#8221;4.4.6&#8243; text_text_color=&#8221;#917881&#8243; text_font_size=&#8221;18px&#8221; text_line_height=&#8221;1em&#8221; background_color=&#8221;rgba(0,0,0,0)&#8221; background_enable_image=&#8221;off&#8221; text_orientation=&#8221;center&#8221; custom_padding=&#8221;|0px||0px|false|false&#8221; text_font_size_tablet=&#8221;&#8221; text_font_size_phone=&#8221;14px&#8221; text_font_size_last_edited=&#8221;on|phone&#8221;]<\/p>\n<p>&nbsp;<\/p>\n<p>8 de setembro de 2020<br \/>Maur\u00edlio Bonora Junior<\/p>\n<p>_______<\/p>\n<p>Revis\u00e3o: Maur\u00edlio Bonora Junior e Ana de Medeiros Arnt<br \/>Edi\u00e7\u00e3o e Arte: Carolina Frandsen P. Costa<\/p>\n<p>[\/et_pb_text][et_pb_toggle open=&#8221;on&#8221; icon_color=&#8221;rgba(0,0,0,0)&#8221; admin_label=&#8221;caixa trecho inicial&#8221; _builder_version=&#8221;4.4.6&#8243; body_font_size=&#8221;18px&#8221; background_color=&#8221;#eeeeee&#8221; text_orientation=&#8221;center&#8221; custom_margin=&#8221;0px||||false|false&#8221; custom_padding=&#8221;0px||50px||false|false&#8221; border_width_all=&#8221;4px&#8221; border_color_all=&#8221;#100617&#8243; box_shadow_style=&#8221;preset4&#8243; box_shadow_color=&#8221;#ff5413&#8243;]<\/p>\n<p style=\"text-align: justify\"><strong>Muito se sabe j\u00e1 sobre as principais c\u00e9lulas do sistema imune que trabalham para combater diferentes tipos de amea\u00e7as, desde v\u00edrus e bact\u00e9rias, at\u00e9 fungos e vermes. Mas, a partir disso, surge a grande d\u00favida: e no caso do SARS-CoV-2, como combatemos ele? <\/strong><\/p>\n<p>[\/et_pb_toggle][et_pb_button button_url=&#8221;https:\/\/drive.google.com\/file\/d\/1mPIBh8kkTF3I3auJoQuvwapODtxuEzDp\/view?usp=sharing&#8221; button_text=&#8221;Baixar cap\u00edtulo&#8221; button_alignment=&#8221;center&#8221; admin_label=&#8221;BAIXAR CAPITULO&#8221; _builder_version=&#8221;4.4.6&#8243; custom_button=&#8221;on&#8221; button_border_color=&#8221;#100617&#8243; button_icon=&#8221;%%1%%&#8221; button_icon_color=&#8221;#ff5413&#8243; custom_margin=&#8221;59px||||false|false&#8221; custom_margin_tablet=&#8221;&#8221; custom_margin_phone=&#8221;42px||0px||false|false&#8221; custom_margin_last_edited=&#8221;on|phone&#8221; custom_padding=&#8221;4px||9px|||&#8221; custom_padding_tablet=&#8221;&#8221; custom_padding_phone=&#8221;0px||9px||false|false&#8221; custom_padding_last_edited=&#8221;on|phone&#8221; box_shadow_style=&#8221;preset4&#8243; box_shadow_color=&#8221;#9b858d&#8221;][\/et_pb_button][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.4.6&#8243;][et_pb_row _builder_version=&#8221;4.4.6&#8243; max_height=&#8221;16px&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.4.6&#8243;][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;trecho  contagem&#8221; _builder_version=&#8221;4.4.6&#8243; _dynamic_attributes=&#8221;link_option_url&#8221; background_color=&#8221;#000b1c&#8221; min_height=&#8221;381.4px&#8221; min_height_tablet=&#8221;247.2px&#8221; min_height_phone=&#8221;321.4px&#8221; min_height_last_edited=&#8221;on|tablet&#8221; custom_margin=&#8221;-9px||||false|false&#8221; custom_margin_tablet=&#8221;57px||||false|false&#8221; custom_margin_phone=&#8221;57px||-2px||false|false&#8221; custom_margin_last_edited=&#8221;on|desktop&#8221; custom_padding=&#8221;0px||0px|0px|false|false&#8221; link_option_url=&#8221;@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wYWdlIiwic2V0dGluZ3MiOnsicG9zdF9pZCI6IjI1OSJ9fQ==@&#8221; link_option_url_new_window=&#8221;on&#8221; locked=&#8221;off&#8221;][et_pb_row custom_padding_last_edited=&#8221;on|phone&#8221; admin_label=&#8221;Desk + Mobile&#8221; _builder_version=&#8221;4.4.6&#8243; background_color=&#8221;rgba(0,0,0,0)&#8221; max_width_tablet=&#8221;&#8221; max_width_phone=&#8221;&#8221; max_width_last_edited=&#8221;on|phone&#8221; custom_margin=&#8221;0px|auto||auto||&#8221; custom_margin_tablet=&#8221;-95px|auto||auto||&#8221; custom_margin_phone=&#8221;-82px|auto||auto||&#8221; custom_margin_last_edited=&#8221;on|phone&#8221; custom_padding=&#8221;85px|||0px||&#8221; custom_padding_tablet=&#8221;&#8221; custom_padding_phone=&#8221;0px||||false|false&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.4.6&#8243;][et_pb_text admin_label=&#8221;Texto&#8221; _builder_version=&#8221;4.4.6&#8243; text_text_color=&#8221;#d6cdce&#8221; text_font_size=&#8221;18px&#8221; background_color=&#8221;#000b1c&#8221; width=&#8221;100%&#8221; max_width=&#8221;100%&#8221; module_alignment=&#8221;center&#8221; min_height=&#8221;72px&#8221; custom_margin=&#8221;0px||13px||false|false&#8221; custom_margin_tablet=&#8221;0px||-49px||false|false&#8221; custom_margin_phone=&#8221;46px|-100px|0px|-100px|false|false&#8221; custom_margin_last_edited=&#8221;on|phone&#8221; custom_padding=&#8221;5px|5px||5px|false|false&#8221; custom_padding_tablet=&#8221;&#8221; custom_padding_phone=&#8221;|0px|0px|20px|false|false&#8221; custom_padding_last_edited=&#8221;on|phone&#8221; text_font_size_tablet=&#8221;&#8221; text_font_size_phone=&#8221;16px&#8221; text_font_size_last_edited=&#8221;on|phone&#8221;]<\/p>\n<p style=\"text-align: center\">Semana epidemiol\u00f3gica #37<\/p>\n<p>[\/et_pb_text][et_pb_number_counter title=&#8221;M\u00e9dia m\u00f3vel de novos casos no Brasil, na ocasi\u00e3o de publica\u00e7\u00e3o deste texto&#8221; number=&#8221;29947&#8243; admin_label=&#8221;contador m\u00e9dia m\u00f3vel&#8221; _builder_version=&#8221;4.4.6&#8243;][\/et_pb_number_counter][et_pb_text admin_label=&#8221;Texto&#8221; _builder_version=&#8221;4.4.6&#8243; text_text_color=&#8221;#d6cdce&#8221; text_font_size=&#8221;18px&#8221; background_color=&#8221;#000b1c&#8221; width=&#8221;100%&#8221; max_width=&#8221;100%&#8221; module_alignment=&#8221;center&#8221; min_height=&#8221;26.2px&#8221; custom_margin=&#8221;0px||13px||false|false&#8221; custom_margin_tablet=&#8221;&#8221; custom_margin_phone=&#8221;|-100px|0px|-100px|false|false&#8221; custom_margin_last_edited=&#8221;on|phone&#8221; custom_padding_tablet=&#8221;&#8221; custom_padding_phone=&#8221;|0px|0px|20px|false|false&#8221; custom_padding_last_edited=&#8221;on|phone&#8221; text_font_size_tablet=&#8221;&#8221; text_font_size_phone=&#8221;16px&#8221; text_font_size_last_edited=&#8221;on|phone&#8221;]<\/p>\n<p style=\"text-align: center\">1.204 \u00f3bitos registrados no dia (123.972 ao todo)<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.4.6&#8243; min_height=&#8221;560px&#8221; custom_margin_phone=&#8221;-100px||||false|false&#8221; custom_margin_last_edited=&#8221;off|desktop&#8221; custom_padding=&#8221;3px|||||&#8221;][et_pb_row column_structure=&#8221;1_4,3_4&#8243; _builder_version=&#8221;4.4.6&#8243; custom_margin=&#8221;32px|auto||auto||&#8221; custom_padding=&#8221;0px|||1px||&#8221;][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.4.6&#8243;][\/et_pb_column][et_pb_column type=&#8221;3_4&#8243; _builder_version=&#8221;4.4.6&#8243;][et_pb_text _builder_version=&#8221;4.4.6&#8243;]<\/p>\n<p style=\"text-align: justify\">Para responder essa pergunta, vamos olhar para v\u00e1rias pesquisas que est\u00e3o sendo feitas ao redor do mundo, tentando entender melhor a imunidade celular. Tais estudos buscam compreender a rela\u00e7\u00e3o desse tipo de resposta imune com o v\u00edrus causador da COVID-19, dando foco um pouco maior para os linf\u00f3citos T.<\/p>\n<p style=\"text-align: justify\">Antes, vamos retomar a estrutura do SARS-CoV-2. Primeiramente, destacamos a\u00a0<em>Spike,\u00a0<\/em>que \u00e9 a prote\u00edna respons\u00e1vel pela entrada dele nas c\u00e9lulas. H\u00e1, tamb\u00e9m, as prote\u00ednas do nucleocaps\u00eddeo, que forma a capa que protege o material gen\u00e9tico. O envelope, que \u00e9 a membrana de gordura que envolve o nucleocaps\u00eddeo. Por fim, as prote\u00ednas n\u00e3o estruturais (relacionadas principalmente \u00e0 replica\u00e7\u00e3o viral). Caso tenha mais d\u00favidas, n\u00e3o deixe de conferir dois textos muito bons que j\u00e1 explicaram sobre elas aqui no blog<sup>\u00a0<\/sup>[1,\u00a02].<\/p>\n<p style=\"text-align: justify\">\n<div id=\"attachment_1305\" style=\"width: 1288px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.blogs.unicamp.br\/linhadefundo\/wp-content\/uploads\/sites\/268\/2021\/12\/Pag.-151.png\" data-rel=\"lightbox-image-0\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-1305\" src=\"https:\/\/www.blogs.unicamp.br\/linhadefundo\/wp-content\/uploads\/sites\/268\/2021\/12\/Pag.-151.png\" width=\"1278\" height=\"720\" alt=\"\" class=\"wp-image-1305 size-full\" \/><\/a><p id=\"caption-attachment-1305\" class=\"wp-caption-text\">Adaptado de uma imagem de Davian Ho (CC BY) para o Innovative Genomics Institute.<\/p><\/div>\n<h5>Uma descoberta surpreendente<\/h5>\n<p style=\"text-align: justify\">A cada dia um n\u00famero maior de artigos vem sendo publicados e mostrando aquilo que muitos pesquisadores j\u00e1 imaginavam que poderia acontecer. Isto \u00e9, desde pessoas que tiveram a forma assintom\u00e1tica e leve da COVID-19 at\u00e9 as que tiveram a forma severa, desenvolvem linf\u00f3citos T de mem\u00f3ria. Estes linf\u00f3citos s\u00e3o capazes de responder ao v\u00edrus de forma eficiente, caso sejam expostos a ele novamente. V\u00e1rios estudos mostraram que c\u00e9lulas de mem\u00f3ria reagem contra partes diferentes do SARS-CoV-2\u00a0[3-8], desde a\u00a0<em>Spike<\/em>, at\u00e9 a <text>prote\u00edna do envelope<\/text>, nucleocaps\u00eddeo e <text>NSPs<\/text>.<\/p>\n<p>[\/et_pb_text][et_pb_toggle open=&#8221;on&#8221; open_toggle_text_color=&#8221;#ff5413&#8243; closed_toggle_background_color=&#8221;#000b1c&#8221; icon_color=&#8221;rgba(0,0,0,0)&#8221; admin_label=&#8221;se\u00e7\u00f5es do livro&#8221; _builder_version=&#8221;4.4.6&#8243; title_text_color=&#8221;#ff5413&#8243; title_font=&#8221;ABeeZee||||||||&#8221; title_font_size=&#8221;14px&#8221; background_color=&#8221;#ffffff&#8221; body_font_size_tablet=&#8221;&#8221; body_font_size_phone=&#8221;13px&#8221; body_font_size_last_edited=&#8221;on|desktop&#8221; border_width_left=&#8221;0px&#8221; box_shadow_style=&#8221;preset3&#8243; box_shadow_blur=&#8221;7px&#8221; box_shadow_spread=&#8221;-12px&#8221; locked=&#8221;off&#8221;]<\/p>\n<h5><strong>Nota dos Editores:<\/strong><\/h5>\n<p>Simplificando, \u2018pro\u00adte\u00ednas do enve\u00adlope\u2019 s\u00e3o aquelas que est\u00e3o encaixa\u00addas na membrana li\u00adpoproteica. J\u00e1 \u2018<em>NSPs<\/em>\u2019 \u00e9 a sigla para <em>nons\u00adtructural proteins<\/em>, ou seja, prote\u00ednas n\u00e3o estruturais, que tem fun\u00e7\u00f5es relacionadas \u00e0 replica\u00e7\u00e3o do v\u00edrus e sua patog\u00eanese.<\/p>\n<p>&nbsp;<\/p>\n<p>[\/et_pb_toggle][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; fullwidth=&#8221;on&#8221; admin_label=&#8221;faixa azul escura&#8221; _builder_version=&#8221;4.4.6&#8243; background_color=&#8221;rgba(0,0,0,0)&#8221;][et_pb_fullwidth_header text_orientation=&#8221;center&#8221; header_fullscreen=&#8221;on&#8221; header_scroll_down=&#8221;on&#8221; scroll_down_icon=&#8221;%%2%%&#8221; scroll_down_icon_size=&#8221;23px&#8221; background_overlay_color=&#8221;#000b1c&#8221; logo_image_url=&#8221;https:\/\/www.blogs.unicamp.br\/linhadefundo\/wp-content\/uploads\/sites\/268\/2021\/11\/100pxplanet-covid-icon.png&#8221; admin_label=&#8221;TRECHO DESTACADO&#8221; _builder_version=&#8221;4.4.6&#8243; title_font=&#8221;Akronim||||||||&#8221; title_text_color=&#8221;#eeeeee&#8221; content_font=&#8221;|300|||||||&#8221; content_text_color=&#8221;#eeeeee&#8221; content_font_size=&#8221;23px&#8221; background_color=&#8221;rgba(255,199,35,0)&#8221; background_image=&#8221;https:\/\/www.blogs.unicamp.br\/linhadefundo\/wp-content\/uploads\/sites\/268\/2021\/11\/fundo_bolinhas.png&#8221; parallax=&#8221;on&#8221; module_alignment=&#8221;center&#8221; scroll_vertical_motion_enable=&#8221;off&#8221; scroll_horizontal_motion_enable=&#8221;off&#8221; motion_trigger_start=&#8221;top&#8221; border_width_all_image=&#8221;0px&#8221;]<\/p>\n<h1 class=\"et_pb_module_header et-fb-editable-element et-fb-editable-element__editing\" data-shortcode-id=\"5.0-1638058070855\" data-quickaccess-id=\"title\" style=\"text-align: left\">&#8220;<\/h1>\n<p>O\u00a0que mais tem chamado a aten\u00e7\u00e3o dos pesquisadores \u00e9 o fen\u00f4meno chamado de Imunidade ou Reatividade Cruzada de linf\u00f3citos T de mem\u00f3ria de outros coronav\u00edrus contra prote\u00ednas do SARS-CoV-2.\u00a0<\/p>\n<h1 style=\"text-align: right\">&#8220;<\/h1>\n<p>[\/et_pb_fullwidth_header][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.4.6&#8243; min_height=&#8221;560px&#8221; custom_margin_phone=&#8221;-100px||||false|false&#8221; custom_margin_last_edited=&#8221;off|desktop&#8221; custom_padding=&#8221;3px|||||&#8221;][et_pb_row column_structure=&#8221;1_4,3_4&#8243; _builder_version=&#8221;4.4.6&#8243; custom_margin=&#8221;32px|auto||auto||&#8221; custom_padding=&#8221;0px|||1px||&#8221;][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.4.6&#8243;][\/et_pb_column][et_pb_column type=&#8221;3_4&#8243; _builder_version=&#8221;4.4.6&#8243;][et_pb_text _builder_version=&#8221;4.4.6&#8243;]<\/p>\n<h5>Sobre a Imunidade ou Reatividade Cruzada, de novo<\/h5>\n<p style=\"text-align: justify\">Contudo, o que mais tem chamado a aten\u00e7\u00e3o dos pesquisadores \u00e9 o fen\u00f4meno chamado de Imunidade ou Reatividade Cruzada de linf\u00f3citos T de mem\u00f3ria de outros coronav\u00edrus contra prote\u00ednas do SARS-CoV-2. Um artigo publicado na <em>Nature<\/em>\u00a0[3], mostrou que uma parte das pessoas infectadas com o v\u00edrus da SARS de 2002-2003 (SARS-CoV-1), h\u00e1 17 anos atr\u00e1s, ainda tinham c\u00e9lulas que conseguiam responder e se multiplicar ao reconhecerem a prote\u00edna N (de nucleocaps\u00eddeo) do SARS-CoV-2.<\/p>\n<p style=\"text-align: justify\">Esse mesmo artigo tamb\u00e9m viu que indiv\u00edduos que n\u00e3o haviam contra\u00eddo a SARS e COVID-19, tinham linf\u00f3citos T de mem\u00f3ria. Estes linf\u00f3citos T respondiam principalmente a duas NSPs do SARS-CoV-2, e \u00e0 prote\u00edna N. Al\u00e9m disso, os linf\u00f3citos reconheciam um peda\u00e7o da prote\u00edna N que era muito parecido com peda\u00e7os da mesma prote\u00edna de outros coronav\u00edrus de humanos. No entanto, com os fragmentos das NSPs isso n\u00e3o acontecia, levantando a hip\u00f3tese que essas c\u00e9lulas poderiam responder a fragmentos de prote\u00ednas de coronav\u00edrus animais.<\/p>\n<p style=\"text-align: justify\">Um segundo artigo [4], mostrou que uma parte dos pacientes saud\u00e1veis, que n\u00e3o tinham sido expostos a COVID-19, tamb\u00e9m possu\u00edam linf\u00f3citos T de mem\u00f3ria funcionais. Estes respondiam h\u00e1 um fragmento da prote\u00edna S, assim como pacientes que haviam se infectado com o SARS-CoV-2. Al\u00e9m disso, esse fragmento da\u00a0<em>Spike<\/em>\u00a0(que as c\u00e9lulas respondiam) \u00e9 bastante parecido com a\u00a0<em>Spike<\/em>\u00a0de outros coronav\u00edrus de humanos (os HCoVs).<\/p>\n<p style=\"text-align: justify\">A partir de experimentos, utilizando tanto a prote\u00edna\u00a0<em>Spike<\/em>\u00a0dos HCoVs, quanto os HCoVs inteiros, os pesquisadores viram que essas c\u00e9lulas de mem\u00f3ria reagentes, presente em pacientes que nunca tinham se infectado com SARS ou COVID-19, respondiam muito bem e eram capazes de se multiplicar tanto na presen\u00e7a da prote\u00edna quanto do v\u00edrus completo.<\/p>\n<h5 style=\"text-align: justify\">O que tudo isso significa?<\/h5>\n<p style=\"text-align: justify\">A essa altura do campeonato, voc\u00eas devem estar se perguntando o que toda essa quantidade absurda de siglas e dados tem a ver com voc\u00eas.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; fullwidth=&#8221;on&#8221; admin_label=&#8221;faixa azul escura&#8221; _builder_version=&#8221;4.4.6&#8243; background_color=&#8221;rgba(0,0,0,0)&#8221;][et_pb_fullwidth_header text_orientation=&#8221;center&#8221; header_fullscreen=&#8221;on&#8221; header_scroll_down=&#8221;on&#8221; scroll_down_icon=&#8221;%%2%%&#8221; scroll_down_icon_size=&#8221;23px&#8221; background_overlay_color=&#8221;#000b1c&#8221; logo_image_url=&#8221;https:\/\/www.blogs.unicamp.br\/linhadefundo\/wp-content\/uploads\/sites\/268\/2021\/11\/100pxplanet-covid-icon.png&#8221; admin_label=&#8221;TRECHO DESTACADO&#8221; _builder_version=&#8221;4.4.6&#8243; title_font=&#8221;Akronim||||||||&#8221; title_text_color=&#8221;#eeeeee&#8221; content_font=&#8221;|300|||||||&#8221; content_text_color=&#8221;#eeeeee&#8221; content_font_size=&#8221;23px&#8221; background_color=&#8221;rgba(255,199,35,0)&#8221; background_image=&#8221;https:\/\/www.blogs.unicamp.br\/linhadefundo\/wp-content\/uploads\/sites\/268\/2021\/11\/fundo_bolinhas.png&#8221; parallax=&#8221;on&#8221; module_alignment=&#8221;center&#8221; scroll_vertical_motion_enable=&#8221;off&#8221; scroll_horizontal_motion_enable=&#8221;off&#8221; motion_trigger_start=&#8221;top&#8221; border_width_all_image=&#8221;0px&#8221;]<\/p>\n<h1 class=\"et_pb_module_header et-fb-editable-element et-fb-editable-element__editing\" data-shortcode-id=\"5.0-1638058070855\" data-quickaccess-id=\"title\" style=\"text-align: left\">&#8220;<\/h1>\n<p style=\"text-align: left\">O ponto todo desses estudos \u00e9 indicar que existe uma certa quantidade de imunidade em pessoas n\u00e3o expostas ao causador da COVID-19. Al\u00e9m disso, as pesquisas buscam mostrar a imunidade celular que geramos contra o SARS-CoV-2. \u00c9 claro que grandes d\u00favidas ainda ficam no ar, como por exemplo: de onde v\u00eam essas c\u00e9lulas? Qual o grau de prote\u00e7\u00e3o que elas garantem? O que poderia ter levado a forma\u00e7\u00e3o delas?\u00a0<\/p>\n<h1 style=\"text-align: right\">&#8220;<\/h1>\n<p>[\/et_pb_fullwidth_header][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.4.6&#8243; min_height=&#8221;560px&#8221; custom_margin_phone=&#8221;-100px||||false|false&#8221; custom_margin_last_edited=&#8221;off|desktop&#8221; custom_padding=&#8221;3px|||||&#8221;][et_pb_row column_structure=&#8221;1_4,3_4&#8243; _builder_version=&#8221;4.4.6&#8243; custom_margin=&#8221;32px|auto||auto||&#8221; custom_padding=&#8221;0px|||1px||&#8221;][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.4.6&#8243;][\/et_pb_column][et_pb_column type=&#8221;3_4&#8243; _builder_version=&#8221;4.4.6&#8243;][et_pb_text _builder_version=&#8221;4.4.6&#8243;]<\/p>\n<p style=\"text-align: justify\">O ponto todo desses estudos \u00e9 indicar que existe uma certa quantidade de imunidade em pessoas n\u00e3o expostas ao causador da COVID-19. Al\u00e9m disso, as pesquisas buscam mostrar a imunidade celular que geramos contra o SARS-CoV-2. \u00c9 claro que grandes d\u00favidas ainda ficam no ar, como por exemplo: de onde v\u00eam essas c\u00e9lulas? Qual o grau de prote\u00e7\u00e3o que elas garantem? O que poderia ter levado a forma\u00e7\u00e3o delas?<\/p>\n<p style=\"text-align: justify\">Como j\u00e1 comentado anteriormente, muitos pesquisadores especulam que essas c\u00e9lulas possam surgir a partir de eventos pr\u00e9vios de infec\u00e7\u00e3o pelos Coronav\u00edrus End\u00eamicos de Humanos (HCoVs) [9]. Estes coronav\u00edrus s\u00e3o causadores dos ciclos de resfriado comum nas esta\u00e7\u00f5es secas e que circulam amplamente entre a popula\u00e7\u00e3o humana, assim como o v\u00edrus influenza. Dessa forma, acredita-se que as pessoas que j\u00e1 tivessem entrado em contato com esses v\u00edrus teriam uma maior chance de ter c\u00e9lulas de mem\u00f3ria. As c\u00e9lulas de mem\u00f3ria poderiam responder a alguma prote\u00edna, ou fragmento de prote\u00edna, que fosse compartilhado entre os HCoVs e o SARS-CoV-2.<\/p>\n<p>&nbsp;<\/p>\n<h5>Mas qual a implica\u00e7\u00e3o disso?<\/h5>\n<p style=\"text-align: justify\">A principal hip\u00f3tese levantada \u00e9 que a presen\u00e7a de linf\u00f3citos de mem\u00f3ria em parte da popula\u00e7\u00e3o seja o <text>porqu\u00ea algumas pessoas desenvolvem a forma leve da doen\u00e7a<\/text>. Ou, at\u00e9 mesmo, permanecem de forma assintom\u00e1tica \u2013 estes seriam os casos em que h\u00e1 a presen\u00e7a dessas c\u00e9lulas de mem\u00f3ria. Enquanto isso, a COVID-19 poderia estar relacionada \u00e0 presen\u00e7a de comorbidade (como j\u00e1 foi muito discutido) somada a falta dessas c\u00e9lulas de mem\u00f3ria. Isso, claro, em sua forma mais severa. Aqui \u00e9 necess\u00e1rio lembrar que as pessoas que teriam os linf\u00f3citos de mem\u00f3ria poderiam gerar a forma leve ou assintom\u00e1tica, em decorr\u00eancia delas conseguirem montar uma resposta mais r\u00e1pida e forte contra o SARS-CoV-2, dessa forma limitando a severidade da doen\u00e7a.<\/p>\n<p>[\/et_pb_text][et_pb_toggle open=&#8221;on&#8221; open_toggle_text_color=&#8221;#ff5413&#8243; closed_toggle_background_color=&#8221;#000b1c&#8221; icon_color=&#8221;rgba(0,0,0,0)&#8221; admin_label=&#8221;se\u00e7\u00f5es do livro&#8221; _builder_version=&#8221;4.4.6&#8243; title_text_color=&#8221;#ff5413&#8243; title_font=&#8221;ABeeZee||||||||&#8221; title_font_size=&#8221;14px&#8221; background_color=&#8221;#ffffff&#8221; body_font_size_tablet=&#8221;&#8221; body_font_size_phone=&#8221;13px&#8221; body_font_size_last_edited=&#8221;on|desktop&#8221; border_width_left=&#8221;0px&#8221; box_shadow_style=&#8221;preset3&#8243; box_shadow_blur=&#8221;7px&#8221; box_shadow_spread=&#8221;-12px&#8221; locked=&#8221;off&#8221;]<\/p>\n<h5><strong>Nota dos Editores:<\/strong><\/h5>\n<p>At\u00e9 hoje permanece em d\u00favida os fatores que levam uma pes\u00adsoa a desenvolver a forma assintom\u00e1tica da COVID-19. Por causa da dificuldade de se estudar as c\u00e9\u00adlulas de mem\u00f3ria (vide o n\u00famero cada vez maior de pessoas infectadas pelo SARS-CoV-2), conti\u00adnua muito dif\u00edcil en\u00adtender como essas c\u00e9lulas provindas de outras infec\u00e7\u00f5es in\u00adfluenciam o desen\u00advolvimento da COVID-19.<\/p>\n<p>[\/et_pb_toggle][et_pb_text _builder_version=&#8221;4.4.6&#8243;]<\/p>\n<p style=\"text-align: justify\">Um outro impacto que a exist\u00eancia de uma imunidade celular cruzada entre SARS-CoV-2 e HCoVs poderia ter \u00e9 relacionada ao desenvolvimento de vacinas. A pr\u00e9-exist\u00eancia de linf\u00f3citos T de mem\u00f3ria, principalmente nas primeiras fases de testes, poderia gerar um fator de confus\u00e3o durante a an\u00e1lise dos resultados. Assim, n\u00e3o seria poss\u00edvel saber se essas c\u00e9lulas que respondem \u00e0 vacina seriam novos linf\u00f3citos gerados a partir dessa imuniza\u00e7\u00e3o, ou linf\u00f3citos de mem\u00f3ria que foram reativados ap\u00f3s a vacina\u00e7\u00e3o. Dessa forma, esta informa\u00e7\u00e3o, obviamente, n\u00e3o \u00e9 banal dentro do que precisamos compreender sobre o coronav\u00edrus\u2026<\/p>\n<p style=\"text-align: justify\">\n<h5 style=\"text-align: justify\">Por fim\u2026<\/h5>\n<p style=\"text-align: justify\">Apesar disso tudo, muitos estudos (principalmente com grupos maiores e mais diversos de humanos) ainda precisam ser realizados. Tais estudos necessitam verificar a pr\u00e9-imunidade ao SARS-CoV-2 \u2013 decorrente dos HCoVs. Al\u00e9m disso, analisar o potencial de infec\u00e7\u00e3o e severidade da doen\u00e7a nesses casos, atrav\u00e9s da medi\u00e7\u00e3o dessa pr\u00e9-imunidade antes e ap\u00f3s os testes. Como voc\u00eas podem ver, ainda h\u00e1 muito o que descobrir sobre esta doen\u00e7a e nosso sistema imune!\u00a0<span style=\"color: #ff6600\">\u25a0<\/span><\/p>\n<p>[\/et_pb_text][et_pb_toggle open=&#8221;on&#8221; icon_color=&#8221;rgba(0,0,0,0)&#8221; admin_label=&#8221;para saber mais&#8221; _builder_version=&#8221;4.4.6&#8243; body_font_size=&#8221;14px&#8221; body_line_height=&#8221;1em&#8221; background_color=&#8221;#eeeeee&#8221; text_orientation=&#8221;center&#8221; custom_margin=&#8221;0px||||false|false&#8221; custom_padding=&#8221;0px||50px||false|false&#8221; body_text_color_tablet=&#8221;&#8221; body_text_color_phone=&#8221;&#8221; body_text_color_last_edited=&#8221;on|tablet&#8221; border_width_all=&#8221;4px&#8221; border_color_all=&#8221;#100617&#8243; box_shadow_style=&#8221;preset4&#8243; box_shadow_color=&#8221;#ff5413&#8243;]<\/p>\n<p style=\"text-align: left\"><span style=\"color: #ff5413\">PARA SABER MAIS\u00a0<\/span><\/p>\n<p><span style=\"font-size: 14px\">\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<ol>\n<ol>\n<ul>\n<ol>\n<li style=\"text-align: justify\">Laborda, Prianda Rios Laborda. A Joia da Coroa. <em>Especial COVID-19, Blogs de Ci\u00eancia da Unicamp<\/em>, 2020. Dispon\u00edvel em: <a href=\"https:\/\/www.blogs.unicamp.br\/covid-19\/a-joia-da-coroa\/\">https:\/\/www.blogs.unicamp.br\/COVID-19\/a-joia-da-coroa\/<\/a><\/li>\n<li style=\"text-align: justify\">Oliveira, Graciele de Almeida. Valent\u00f5es dentro da c\u00e9lula, sens\u00edveis fora dela: os v\u00edrus. <em>Especial COVID-19, Blogs de Ci\u00eancia da Unicamp<\/em>, 2020. Dispon\u00edvel em: <a href=\"https:\/\/www.blogs.unicamp.br\/covid-19\/valentoes-dentro-da-celula-sensiveis-fora-dela-os-virus\/\">https:\/\/www.blogs.unicamp.br\/COVID-19\/valentoes-dentro-da-celula-sensiveis-fora-dela-os-virus\/<\/a><\/li>\n<li style=\"text-align: justify\">Le Bert, Nina, Anthony T. Tan, Kamini Kunasegaran, Christine YL Tham, Morteza Hafezi, Adeline Chia, Melissa Hui Yen Chng et al. SARS-CoV-2-specific T cell immunity in cases of COVID-19 and SARS, and uninfected controls. <em>Nature<\/em> 584, no. 7821, 457-462, 2020. Dispon\u00edvel em: <a href=\"https:\/\/doi.org\/10.1038\/s41586-020-2550-z\">https:\/\/doi.org\/10.1038\/s41586-020-2550-z<\/a><\/li>\n<li style=\"text-align: justify\">Braun, Julian, Lucie Loyal, Marco Frentsch, Daniel Wendisch, Philipp Georg, Florian Kurth, Stefan Hippenstiel et al. SARS-CoV-2-reactive T cells in healthy donors and patients with COVID-19. <em>Nature<\/em> 587, no. 7833, 270-274, 2020. Disponivel em: <a href=\"https:\/\/doi.org\/10.1038\/s41586-020-2598-9\">https:\/\/doi.org\/10.1038\/s41586-020-2598-9<\/a><\/li>\n<li style=\"text-align: justify\">Ni, Ling, Fang Ye, Meng-Li Cheng, Yu Feng, Yong-Qiang Deng, Hui Zhao, Peng Wei et al. Detection of SARS-CoV-2-specific humoral and cellular immunity in COVID-19 convalescent individuals. <em>Immunity<\/em> 52, no. 6, 971-977, 2020. Dispon\u00edvel em: <a href=\"https:\/\/doi.org\/10.1016\/j.immuni.2020.04.023\">https:\/\/doi.org\/10.1016\/j.immuni.2020.04.023<\/a><\/li>\n<li style=\"text-align: justify\">Sekine, Takuya, Andr\u00e9 Perez-Potti, Olga Rivera-Ballesteros, Kristoffer Str\u00e5lin, Jean-Baptiste Gorin, Annika Olsson, Sian Llewellyn-Lacey et al. Robust T cell immunity in convalescent individuals with asymptomatic or mild COVID-19. <em>Cell<\/em> 183, no. 1, 158-168, 2020. Disponivel em: <a href=\"https:\/\/doi.org\/10.1016\/j.cell.2020.08.017\">https:\/\/doi.org\/10.1016\/j.cell.2020.08.017<\/a><\/li>\n<li style=\"text-align: justify\">Meckiff, Benjamin J., Ciro Ram\u00edrez-Su\u00e1stegui, Vicente Fajardo, Serena J. Chee, Anthony Kusnadi, Hayley Simon, Alba Grifoni et al. Single-cell transcriptomic analysis of SARS-CoV-2 reactive CD4+ T cells. <em>Social Science Research Network<\/em>, 2020. Dispon\u00edvel em: <a href=\"https:\/\/dx.doi.org\/10.2139%2Fssrn.3641939\">https:\/\/dx.doi.org\/10.2139%2Fssrn.3641939<\/a><\/li>\n<li style=\"text-align: justify\">Grifoni, Alba, Daniela Weiskopf, Sydney I. Ramirez, Jose Mateus, Jennifer M. Dan, Carolyn Rydyznski Moderbacher, Stephen A. Rawlings et al. Targets of T cell responses to SARS-CoV-2 coronavirus in humans with COVID-19 disease and unexposed individuals. <em>Cell<\/em> 181, no. 7, 1489-1501, 2020. Dispon\u00edvel em: <a href=\"https:\/\/doi.org\/10.1016\/j.cell.2020.05.015\">https:\/\/doi.org\/10.1016\/j.cell.2020.05.015<\/a><\/li>\n<li style=\"text-align: justify\">Sette, Alessandro, and Shane Crotty. Pre-existing immunity to SARS-CoV-2: the knowns and unknowns. <em>Nature Reviews Immunology<\/em> 20, no. 8, 457-458, 2020. Dispon\u00edvel em: <a href=\"https:\/\/doi.org\/10.1038\/s41577-020-00430-w\">https:\/\/doi.org\/10.1038\/s41577-020-00430-w<\/a><\/li>\n<\/ol>\n<\/ul>\n<\/ol>\n<\/ol>\n<p>[\/et_pb_toggle][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; custom_padding_last_edited=&#8221;on|phone&#8221; admin_label=&#8221;Mobile only&#8221; _builder_version=&#8221;4.4.6&#8243; background_color=&#8221;#eeeeee&#8221; width=&#8221;100%&#8221; max_width=&#8221;100%&#8221; module_alignment=&#8221;center&#8221; custom_padding=&#8221;|50px||50px|false|false&#8221; custom_padding_tablet=&#8221;&#8221; custom_padding_phone=&#8221;|5px||5px|false|false&#8221; saved_tabs=&#8221;all&#8221; locked=&#8221;off&#8221;][et_pb_row custom_padding_last_edited=&#8221;on|phone&#8221; _builder_version=&#8221;4.4.6&#8243; background_enable_color=&#8221;off&#8221; background_enable_image=&#8221;off&#8221; background_blend=&#8221;darken&#8221; width=&#8221;100%&#8221; max_width=&#8221;2560px&#8221; max_width_tablet=&#8221;2560%&#8221; max_width_phone=&#8221;100%&#8221; max_width_last_edited=&#8221;on|phone&#8221; module_alignment=&#8221;center&#8221; custom_margin=&#8221;|auto|-58px|auto||&#8221; custom_padding=&#8221;|20px||20px|false|false&#8221; custom_padding_tablet=&#8221;&#8221; custom_padding_phone=&#8221;|0px||0px|false|false&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.4.6&#8243; custom_padding=&#8221;|0px||0px|false|false&#8221;][et_pb_button button_url=&#8221;@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wYWdlIiwic2V0dGluZ3MiOnsicG9zdF9pZCI6IjYzNCJ9fQ==@&#8221; button_text=&#8221;Leia mais na parte 3: A COVID-19 por dentro do corpo&#8221; button_alignment=&#8221;left&#8221; _builder_version=&#8221;4.4.6&#8243; _dynamic_attributes=&#8221;button_url&#8221; custom_button=&#8221;on&#8221; button_text_size=&#8221;15px&#8221; button_text_color=&#8221;#eeeeee&#8221; button_bg_color=&#8221;rgba(16,6,23,0.82)&#8221; button_border_width=&#8221;0px&#8221; button_border_radius=&#8221;0px&#8221; button_font=&#8221;ABeeZee|700|||||||&#8221; button_use_icon=&#8221;off&#8221; box_shadow_style=&#8221;preset4&#8243;][\/et_pb_button][et_pb_post_slider include_categories=&#8221;8&#8243; orderby=&#8221;title_asc&#8221; more_text=&#8221;Abrir cap\u00edtulo&#8221; excerpt_length=&#8221;500&#8243; show_meta=&#8221;off&#8221; show_image=&#8221;off&#8221; arrows_custom_color=&#8221;#ff5413&#8243; _builder_version=&#8221;4.4.6&#8243; header_level=&#8221;h4&#8243; header_font=&#8221;ABeeZee|700||on|||||&#8221; header_text_align=&#8221;center&#8221; header_text_color=&#8221;#ffc723&#8243; header_font_size=&#8221;17px&#8221; body_text_align=&#8221;left&#8221; body_font_size=&#8221;15px&#8221; background_color=&#8221;rgba(16,6,23,0.82)&#8221; background_image=&#8221;https:\/\/www.blogs.unicamp.br\/linhadefundo\/wp-content\/uploads\/sites\/268\/2021\/10\/b4500.png&#8221; background_blend=&#8221;darken&#8221; custom_button=&#8221;on&#8221; button_text_size=&#8221;15px&#8221; button_alignment=&#8221;center&#8221; width=&#8221;1800px&#8221; width_tablet=&#8221;1000px&#8221; width_phone=&#8221;&#8221; width_last_edited=&#8221;on|desktop&#8221; max_width=&#8221;100%&#8221; max_width_tablet=&#8221;&#8221; max_width_phone=&#8221;100%&#8221; max_width_last_edited=&#8221;on|phone&#8221; module_alignment=&#8221;center&#8221; content_width=&#8221;100%&#8221; content_max_width=&#8221;100%&#8221; custom_margin=&#8221;|0px||0px|false|false&#8221; custom_margin_tablet=&#8221;&#8221; custom_margin_phone=&#8221;&#8221; custom_margin_last_edited=&#8221;on|phone&#8221; custom_padding=&#8221;|0px||0px|false|false&#8221; custom_padding_tablet=&#8221;&#8221; custom_padding_phone=&#8221;|0px||0px|false|false&#8221; custom_padding_last_edited=&#8221;on|phone&#8221; body_font_size_tablet=&#8221;&#8221; body_font_size_phone=&#8221;11px&#8221; body_font_size_last_edited=&#8221;on|phone&#8221; body_line_height_tablet=&#8221;&#8221; body_line_height_phone=&#8221;1.5em&#8221; body_line_height_last_edited=&#8221;on|phone&#8221;][\/et_pb_post_slider][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Muito se sabe j\u00e1 sobre as principais c\u00e9lulas do sistema imune que trabalham para combater diferentes tipos de amea\u00e7as, desde v\u00edrus e bact\u00e9rias, at\u00e9 fungos e vermes. 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