{"id":9046,"date":"2021-04-08T17:43:38","date_gmt":"2021-04-08T20:43:38","guid":{"rendered":"https:\/\/biologo.com.br\/bio\/?p=9046"},"modified":"2021-04-08T21:35:32","modified_gmt":"2021-04-09T00:35:32","slug":"as-novas-variantes","status":"publish","type":"post","link":"https:\/\/biologo.com.br\/bio\/as-novas-variantes\/","title":{"rendered":"As novas variantes"},"content":{"rendered":"<p><span style=\"font-size: 14pt; color: #000000;\"><span style=\"color: #3366ff;\"><strong>As novas variantes do Sars-CoV-2: <\/strong><span style=\"color: #000000;\">Anticorpos produzidos por infec\u00e7\u00e3o pr\u00e9via e por algumas vacinas parecem menos eficazes para deter linhagens do Sars-CoV-2.<\/span><\/span><\/span><\/p>\n<h2><span style=\"font-family: 'courier new', courier, monospace; font-size: 24pt; color: #000000;\"><strong>As novas variantes<\/strong><\/span><\/h2>\n<p><span style=\"font-size: 8pt; color: #000000;\">8\/4\/2021 ::\u00a0 Por Ricardo Zorzetto<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-family: georgia, palatino, serif; font-size: 24pt;\"><strong>C<\/strong><\/span><\/span><span style=\"color: #000000;\">ome\u00e7am a surgir estudos sugerindo que algumas das novas variantes (ou cepas) do v\u00edrus Sars-CoV-2 podem driblar parte da a\u00e7\u00e3o do sistema de defesa de pessoas vacinadas ou que j\u00e1 tiveram Covid-19. <\/span><\/p>\n<figure id=\"attachment_6964\" aria-describedby=\"caption-attachment-6964\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"https:\/\/biologo.com.br\/bio\/mutacao-no-novo-coronavirus\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"6964\" data-permalink=\"https:\/\/biologo.com.br\/bio\/mutacao-no-novo-coronavirus\/utacao-no-novo-coronavirus\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/05\/uta%C3%A7%C3%A3o-no-novo-coronav%C3%ADrus.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"muta\u00e7\u00e3o-no-novo-coronav\u00edrus\" data-image-description=\"&lt;p&gt;Muta\u00e7\u00e3o no novo coronav\u00edrus&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Micrografia eletr\u00f4nica de transmiss\u00e3o de part\u00edculas do v\u00edrus SARS-CoV-2, isoladas de um paciente. Imagem capturada e aprimorada de cores no NIAID Integrated Research Facility (IRF) em Fort Detrick, Maryland. Cr\u00e9dito: NIAID. Origem\tNovel Coronavirus SARS-CoV-2&lt;br \/&gt;\nAutor\tNational Institute of Allergy and Infectious Diseases (NIAID)&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/05\/uta%C3%A7%C3%A3o-no-novo-coronav%C3%ADrus.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-6964 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/05\/uta%C3%A7%C3%A3o-no-novo-coronav%C3%ADrus.jpg?resize=300%2C167&#038;ssl=1\" alt=\"Muta\u00e7\u00e3o no novo coronav\u00edrus\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/05\/uta%C3%A7%C3%A3o-no-novo-coronav%C3%ADrus.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/05\/uta%C3%A7%C3%A3o-no-novo-coronav%C3%ADrus.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-6964\" class=\"wp-caption-text\"><span style=\"font-size: 10pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/mutacao-no-novo-coronavirus\/\">Muta\u00e7\u00e3o no novo coronav\u00edrus<\/a><\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">Dois trabalhos apresentados na primeira semana de mar\u00e7o indicam que os anticorpos produzidos pelo organismo de quem recebeu determinados imunizantes ou sofreu uma infec\u00e7\u00e3o pr\u00e9via pelo v\u00edrus (e desenvolveu ou n\u00e3o a doen\u00e7a) t\u00eam menos poder de neutralizar as variedades que come\u00e7aram a circular nos \u00faltimos meses e est\u00e3o se espalhando rapidamente por v\u00e1rios pa\u00edses.<\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/documentario-coronavirus\/\">Document\u00e1rio coronav\u00edrus<\/a><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\"> Os resultados s\u00e3o iniciais e a confirma\u00e7\u00e3o das conclus\u00f5es a que permitem chegar exige a realiza\u00e7\u00e3o de outros estudos em laborat\u00f3rio, al\u00e9m do acompanhamento das cepas em circula\u00e7\u00e3o por meio do sequenciamento de mais exemplares do v\u00edrus. <\/span><\/p>\n<p><span style=\"color: #000000;\">Eles, no entanto, servem de alerta para uma consequ\u00eancia importante: por escaparem de parte dos anticorpos, as novas variantes podem infectar de novo quem j\u00e1 teve Covid-19 ou contagiar indiv\u00edduos vacinados. Os que receberam o imunizante, ainda que continuem protegidos de desenvolver as formas graves da doen\u00e7a, podem se tornar transmissores do v\u00edrus.<\/span><!--more--><\/p>\n<h3><span style=\"font-family: 'courier new', courier, monospace; font-size: 12pt; color: #000000;\"><strong>O perigo das novas variantes<\/strong><\/span><\/h3>\n<figure id=\"attachment_6647\" aria-describedby=\"caption-attachment-6647\" style=\"width: 300px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/biologo.com.br\/bio\/coronavirus-acelera-producao-cientifica\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"6647\" data-permalink=\"https:\/\/biologo.com.br\/bio\/coronavirus-acelera-producao-cientifica\/coronavirus-acelera-producao-cientifica-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/Coronav%C3%ADrus-acelera-produ%C3%A7%C3%A3o-cient%C3%ADfica.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Coronav\u00edrus-acelera-produ\u00e7\u00e3o-cient\u00edfica\" data-image-description=\"&lt;p&gt;Airmen assist one another in donning their personal protective equipment, while on-board an Air Force C-17 Globemaster III during transportation isolation system training at Joint Base Charleston, South Carolina. Engineered and implemented after the Ebola virus outbreak in 2014, the TIS is an enclosure the Department of Defense can use to safely transport patients with diseases like novel coronavirus. (U.S. Air Force photo by Senior Airman Cody R. Miller). Coronav\u00edrus acelera produ\u00e7\u00e3o cient\u00edfica&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Coronav\u00edrus acelera produ\u00e7\u00e3o cient\u00edfica&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/Coronav%C3%ADrus-acelera-produ%C3%A7%C3%A3o-cient%C3%ADfica.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-6647 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/Coronav%C3%ADrus-acelera-produ%C3%A7%C3%A3o-cient%C3%ADfica.jpg?resize=300%2C167&#038;ssl=1\" alt=\"Coronav\u00edrus acelera produ\u00e7\u00e3o cient\u00edfica\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/Coronav%C3%ADrus-acelera-produ%C3%A7%C3%A3o-cient%C3%ADfica.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/Coronav%C3%ADrus-acelera-produ%C3%A7%C3%A3o-cient%C3%ADfica.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-6647\" class=\"wp-caption-text\"><a href=\"https:\/\/biologo.com.br\/bio\/coronavirus-acelera-producao-cientifica\/\"><span style=\"font-size: 10pt;\">Coronav\u00edrus acelera produ\u00e7\u00e3o cient\u00edfica<\/span><\/a><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">Sob a coordena\u00e7\u00e3o do virologista Jos\u00e9 Luiz Proen\u00e7a M\u00f3dena, da Universidade Estadual de Campinas (Unicamp), um grupo de pesquisadores do Brasil e do exterior avaliou o poder desses anticorpos de deter a variante 20J\/501Y.V3 do novo coronav\u00edrus, que se tornou mais conhecida como P.1 e surgiu em Manaus no final de 2020. <\/span><\/p>\n<p><span style=\"color: #000000;\">Em laborat\u00f3rio, o biom\u00e9dico William Marciel de Souza, que atualmente realiza est\u00e1gio de p\u00f3s-doutorado na Universidade de S\u00e3o Paulo (USP) em Ribeir\u00e3o Preto, exp\u00f4s c\u00f3pias da variante P.1 de pessoas infectadas na capital do Amazonas a anticorpos neutralizantes obtidos de dois grupos de indiv\u00edduos: 19 pessoas que tiveram Covid-19 durante a primeira onda da doen\u00e7a no Amazonas, quando as infec\u00e7\u00f5es eram causadas pela variedade B.1 do v\u00edrus, e oito participantes imunizados na terceira fase de ensaios cl\u00ednicos da CoronaVac, a vacina desenvolvida pela farmac\u00eautica chinesa Sinovac que ser\u00e1 produzida no Brasil pelo Instituto Butantan.<\/span><\/p>\n<figure id=\"attachment_6602\" aria-describedby=\"caption-attachment-6602\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"https:\/\/biologo.com.br\/bio\/coronavirus-no-brasil\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"6602\" data-permalink=\"https:\/\/biologo.com.br\/bio\/coronavirus-no-brasil\/coronavirus\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/Coronavirus.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Coronavirus\" data-image-description=\"&lt;p&gt;Novo Coronav\u00edrus &amp;#8211; Covid-19 no Brasil&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Coronav\u00edrus no Brasil&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/Coronavirus.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-6602 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/Coronavirus.jpg?resize=300%2C167&#038;ssl=1\" alt=\"Coronav\u00edrus no Brasil\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/Coronavirus.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/Coronavirus.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-6602\" class=\"wp-caption-text\"><span style=\"font-size: 10pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/coronavirus-no-brasil\/\">Coronav\u00edrus no Brasil<\/a><\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">Os anticorpos de quem j\u00e1 teve a doen\u00e7a foram de seis a 10 vezes menos eficientes para neutralizar a variante P.1, que j\u00e1 se tornou predominante em ao menos seis estados brasileiros, do que a B.1, uma das primeiras descritas durante a primeira onda que atingiu o pa\u00eds. <\/span><\/p>\n<p><span style=\"color: #000000;\">J\u00e1 a concentra\u00e7\u00e3o de anticorpos no plasma de que quem havia recebido a segunda dose da CoronaVac at\u00e9 agosto de 2020 foi baixa e insuficiente para permitir a avalia\u00e7\u00e3o de seu poder neutralizante diante das variantes P.1 e B.1, indicam os resultados apresentados em um artigo depositado em 1\u00ba de mar\u00e7o na base de pr\u00e9-prints da revista\u00a0<em>The Lancet<\/em>, ainda n\u00e3o revisado por outros pesquisadores da \u00e1rea.<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong><span style=\"font-family: 'courier new', courier, monospace; font-size: 12pt;\">Resposta imunol\u00f3gica<\/span><\/strong><\/span><\/h3>\n<figure id=\"attachment_6887\" aria-describedby=\"caption-attachment-6887\" style=\"width: 150px\" class=\"wp-caption alignright\"><a href=\"https:\/\/biologo.com.br\/bio\/epidemiologista-na-pandemia\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"6887\" data-permalink=\"https:\/\/biologo.com.br\/bio\/epidemiologista-na-pandemia\/epidemiologista-na-pandemia-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/04\/Epidemiologista-na-Pandemia.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Epidemiologista-na-Pandemia\" data-image-description=\"&lt;p&gt;Epidemiologista na Pandemia.&lt;br \/&gt;\ncientista, microbiologista, v\u00edrus, biologia molecular, laborat\u00f3rio, teste de coronav\u00edrus, COVID-19&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Epidemiologista na Pandemia&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/04\/Epidemiologista-na-Pandemia.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-6887 size-thumbnail\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/04\/Epidemiologista-na-Pandemia.jpg?resize=150%2C150&#038;ssl=1\" alt=\"Epidemiologista na Pandemia\" width=\"150\" height=\"150\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/04\/Epidemiologista-na-Pandemia.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/04\/Epidemiologista-na-Pandemia.jpg?zoom=2&amp;resize=150%2C150&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/04\/Epidemiologista-na-Pandemia.jpg?zoom=3&amp;resize=150%2C150&amp;ssl=1 450w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a><figcaption id=\"caption-attachment-6887\" class=\"wp-caption-text\"><span style=\"font-size: 8pt;\"><a href=\"https:\/\/biologo.com.br\/bio\/epidemiologista-na-pandemia\/\">Epidemiologista na Pandemia<\/a><\/span><\/figcaption><\/figure>\n<blockquote><p><span style=\"font-family: 'courier new', courier, monospace; font-size: 10pt; color: #ffffff;\"><strong>\u201cA segunda fase dos ensaios cl\u00ednicos da CoronaVac havia indicado que a concentra\u00e7\u00e3o de anticorpos diminui com o tempo. Nos testes que fizemos, replicados depois com o plasma de um n\u00famero maior de vacinados, a concentra\u00e7\u00e3o de anticorpos neutralizantes nesse grupo foi baixa tanto para a variante P.1 como para a B.1\u201d, conta M\u00f3dena.<\/strong><\/span><\/p><\/blockquote>\n<p><span style=\"color: #000000;\"> \u201cIsso, no entanto, n\u00e3o significa que a vacina n\u00e3o funcione. Os resultados dos ensaios de fase 3 mostraram que ela protege contra o desenvolvimento das formas graves da doen\u00e7a possivelmente porque, al\u00e9m de estimular a produ\u00e7\u00e3o de anticorpos, tamb\u00e9m ativa o bra\u00e7o celular da resposta imunol\u00f3gica, fazendo com que c\u00e9lulas infectadas sejam rapidamente reconhecidas e destru\u00eddas.\u201d<\/span><\/p>\n<figure id=\"attachment_9047\" aria-describedby=\"caption-attachment-9047\" style=\"width: 300px\" class=\"wp-caption alignleft\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"9047\" data-permalink=\"https:\/\/biologo.com.br\/bio\/as-novas-variantes\/as-novas-variantes-do-coronavirus\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/04\/As-novas-variantes-do-coronavirus.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"As-novas-variantes-do-coronavirus\" data-image-description=\"&lt;p&gt;As novas variantes. NIH Image GallerySeguir&lt;br \/&gt;\nNovo Coronav\u00edrus SARS-CoV-2&lt;br \/&gt;\nMicrografia eletr\u00f4nica de varredura colorida de uma c\u00e9lula apopt\u00f3tica (marrom esverdeado) fortemente infectada com part\u00edculas do v\u00edrus SARS-COV-2 (rosa), isolada de uma amostra de paciente. Imagem capturada e aprimorada com cores no NIAID Integrated Research Facility (IRF) em Fort Detrick, Maryland.&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;NIH Image GallerySeguir&lt;br \/&gt;\nNovo Coronav\u00edrus SARS-CoV-2&lt;br \/&gt;\nMicrografia eletr\u00f4nica de varredura colorida de uma c\u00e9lula apopt\u00f3tica (marrom esverdeado) fortemente infectada com part\u00edculas do v\u00edrus SARS-COV-2 (rosa), isolada de uma amostra de paciente. Imagem capturada e aprimorada com cores no NIAID Integrated Research Facility (IRF) em Fort Detrick, Maryland.&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/04\/As-novas-variantes-do-coronavirus.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-9047 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/04\/As-novas-variantes-do-coronavirus.jpg?resize=300%2C167&#038;ssl=1\" alt=\"As novas variantes do coronav\u00edrus\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/04\/As-novas-variantes-do-coronavirus.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/04\/As-novas-variantes-do-coronavirus.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-9047\" class=\"wp-caption-text\"><span style=\"font-size: 10pt;\"><span style=\"font-size: 8pt;\"><strong><span style=\"color: #000000;\">Novo Coronav\u00edrus SARS-CoV-2:<\/span><\/strong><\/span><span style=\"color: #000000;\"> Micrografia eletr\u00f4nica de varredura colorida de uma c\u00e9lula apopt\u00f3tica (marrom esverdeado) fortemente infectada com part\u00edculas do v\u00edrus SARS-COV-2 (rosa)<\/span><\/span><span style=\"font-size: 8pt; color: #000000;\">. Imagem capturada e aprimorada com cores no <a style=\"color: #000000;\" href=\"https:\/\/www.flickr.com\/photos\/nihgov\/49565158908\" target=\"_blank\" rel=\"noopener\">NIAID<\/a> Integrated Research Facility (IRF) em Fort Detrick, Maryland.<\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">Se os anticorpos desses dois grupos de pessoas n\u00e3o bloqueiam de modo eficiente a variante P.1, o que pode ocorrer? \u201cA principal consequ\u00eancia \u00e9 que quem j\u00e1 teve Covid-19 corre o risco de se reinfectar e quem foi vacinado com a CoronaVac pode ser contagiado pelo v\u00edrus. <\/span><\/p>\n<p><span style=\"color: #000000;\">Tanto em um caso como em outro, essas pessoas poder\u00e3o transmiti-lo\u201d, explica o virologista da Unicamp. M\u00f3dena lembra que a n\u00e3o produ\u00e7\u00e3o de anticorpos altamente neutralizantes \u00e9 um fen\u00f4meno comum em vacinas. A vacina contra rotav\u00edrus, em uso h\u00e1 cerca de duas d\u00e9cadas, n\u00e3o impede que as crian\u00e7as se infectem e transmitam o v\u00edrus, mas evita que desenvolvam diarreia grave e morram.<\/span><\/p>\n<h6><span style=\"font-family: 'courier new', courier, monospace; font-size: 12pt;\"><strong><span style=\"color: #000000;\">Dados alarmantes<\/span><\/strong><\/span><\/h6>\n<p><span style=\"color: #000000;\">Tr\u00eas dias ap\u00f3s a divulga\u00e7\u00e3o desses resultados, outro estudo internacional apresentou dados ainda mais preocupantes. <\/span><\/p>\n<p><a href=\"https:\/\/biologo.com.br\/bio\/o-sistema-imunologico\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"7099\" data-permalink=\"https:\/\/biologo.com.br\/bio\/o-sistema-imunologico\/o-sistema-imunologico-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/06\/O-sistema-imunol%C3%B3gico.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"O-sistema-imunol\u00f3gico\" data-image-description=\"&lt;p&gt;O sistema imunit\u00e1rio, sistema imunol\u00f3gico ou ainda sistema imune \u00e9 um sistema de estruturas e processos biol\u00f3gicos que protegem o organismo contra doen\u00e7as. De modo a funcionar corretamente, o sistema imunit\u00e1rio deve detectar uma imensa variedade de agentes, desde os v\u00edrus aos parasitas, e distingui-los do tecido saud\u00e1vel do pr\u00f3prio corpo, o cientista no qual originou o nome foi Elie Metchnikoff em 1882, hoje \u00e9 considerado o pai da imunologia.&lt;\/p&gt;\n\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/06\/O-sistema-imunol%C3%B3gico.jpg?fit=631%2C351&amp;ssl=1\" class=\"alignright wp-image-7099 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/06\/O-sistema-imunol%C3%B3gico.jpg?resize=300%2C167&#038;ssl=1\" alt=\"O sistema imunol\u00f3gico\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/06\/O-sistema-imunol%C3%B3gico.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/06\/O-sistema-imunol%C3%B3gico.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><span style=\"color: #000000;\">O grupo liderado pelo imunologista Michael Diamond, da Universidade de Washington em Saint Louis, Estados Unidos, coautor do estudo da Unicamp, testou o poder de tr\u00eas tipos de anticorpos \u2013 monoclonais (sintetizados em laborat\u00f3rio); extra\u00eddos do plasma de quem j\u00e1 teve Covid-19; e presentes no sangue de pessoas imunizadas com a vacina da Pfizer-BioNTech \u2013 contra a P.1 e algumas outras variantes do v\u00edrus, entre elas a B.1.1.7, que surgiu no sul do Reino Unido e \u00e9 predominante em mais de 80 pa\u00edses, e a B.1.351, identificada na \u00c1frica do Sul e encontrada nos Estados Unidos e em pa\u00edses da Europa.<\/span><\/p>\n<p><a href=\"https:\/\/biologo.com.br\/bio\/imunologia\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1910\" data-permalink=\"https:\/\/biologo.com.br\/bio\/imunologia\/laboratorio-de-imunologia\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2016\/12\/laboratorio-de-imunologia.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"laboratorio-de-imunologia\" data-image-description=\"&lt;p&gt;Imunologia. Biswarup Ganguly [GFDL (http:\/\/www.gnu.org\/copyleft\/fdl.html), CC BY 3.0 (http:\/\/creativecommons.org\/licenses\/by\/3.0), GFDL (http:\/\/www.gnu.org\/copyleft\/fdl.html) or CC BY 3.0 (http:\/\/creativecommons.org\/licenses\/by\/3.0)], via Wikimedia Commons. immunology and Regenerative Medicine Research Laboratory &amp;#8211; University of Calcutta &amp;#8211; Ballygunge &amp;#8211; Kolkata&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;immunology and Regenerative Medicine Research Laboratory &amp;#8211; University of Calcutta &amp;#8211; Ballygunge &amp;#8211; Kolkata&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2016\/12\/laboratorio-de-imunologia.jpg?fit=631%2C351&amp;ssl=1\" class=\"alignleft wp-image-1910 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2016\/12\/laboratorio-de-imunologia.jpg?resize=300%2C167&#038;ssl=1\" alt=\"Imunologia\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2016\/12\/laboratorio-de-imunologia.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2016\/12\/laboratorio-de-imunologia.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><span style=\"color: #000000;\">Publicados na edi\u00e7\u00e3o de 4 de mar\u00e7o da revista\u00a0<em>Nature Medicine<\/em>, os resultados indicam que muitos dos anticorpos com alto poder neutralizante \u201cmostraram atividade inibit\u00f3ria reduzida\u201d contra as variantes emergentes, em especial aquelas contendo a muta\u00e7\u00e3o E484K, presente na cepa que surgiu em Manaus e na origin\u00e1ria da \u00c1frica do Sul. <\/span><\/p>\n<p><span style=\"color: #000000;\">Essa muta\u00e7\u00e3o altera a estrutura de um trecho da prote\u00edna da\u00a0<em>spike\u00a0<\/em>(ou prote\u00edna S, que permite ao v\u00edrus se ligar \u00e0s c\u00e9lulas humanas) ao qual aderem alguns dos anticorpos. Nesse caso, \u00e9 maior o receio de que as cepas com essa muta\u00e7\u00e3o possam escapar de algumas vacinas, como a da Pfizer-BioNTech e da Moderna. Esses imunizantes funcionam principalmente por estimular a produ\u00e7\u00e3o de anticorpos contra a prote\u00edna S, diferentemente da CoronaVac, que utiliza o v\u00edrus inteiro e leva \u00e0 s\u00edntese de anticorpos contra outras partes do Sars-CoV-2.<\/span><\/p>\n<h4><span style=\"color: #000000; font-family: 'courier new', courier, monospace; font-size: 10pt;\">Fonte: <\/span><span style=\"color: #000000;\"><a style=\"color: #000000;\" title=\"O perigo das novas variantes\" href=\"https:\/\/revistapesquisa.fapesp.br\/o-perigo-das-novas-variantes\/\"><span style=\"font-size: 8pt;\">O perigo das novas variantes<\/span><\/a><\/span><span style=\"font-size: 8pt;\"><span style=\"color: #000000;\">\/<\/span><a style=\"color: #000000;\" href=\"https:\/\/revistapesquisa.fapesp.br\/\" target=\"_blank\" rel=\"noopener noreferrer\">Revista Fapesp<\/a>\u00a0 <a style=\"color: #999999;\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/\" target=\"_blank\" rel=\"noopener noreferrer\">CC BY-ND 4.0<\/a><\/span><\/h4>\n","protected":false},"excerpt":{"rendered":"<p>As novas variantes do Sars-CoV-2: Anticorpos produzidos por infec\u00e7\u00e3o pr\u00e9via e por algumas vacinas parecem menos eficazes para deter linhagens<\/p>\n","protected":false},"author":1,"featured_media":9047,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"As novas variantes: Anticorpos produzidos por infec\u00e7\u00e3o pr\u00e9via e por algumas vacinas parecem menos eficazes para deter linhagens do Sars-CoV-2 que come\u00e7am a se espalhar.","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[17,119,147,146],"tags":[],"class_list":["post-9046","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-biomedicas","category-bioquimica","category-epidemiologia","category-imunologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>As novas variantes do Sars-CoV-2: um perigo para o mundo - Virologia<\/title>\n<meta name=\"description\" content=\"Anticorpos produzidos por infec\u00e7\u00e3o pr\u00e9via e algumas vacinas parecem menos eficazes para linhagens novas. 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