R\u0103celile de sezon nu s\u00eent deloc distractive, \u00eens\u0103 noi cercet\u0103ri sugereaz\u0103 c\u0103 oamenii care au avut astfel de r\u0103celi \u00een trecut pot fi mai proteja\u021bi \u00een fa\u021ba noului coronavirus SARS-CoV-2. Studiul mai sugereaz\u0103 c\u0103 imunitatea la noul virus ar putea dura mai mult timp, posibil chiar o via\u021b\u0103 \u00eentreag\u0103.<\/p>\n
Studiul este primul care arat\u0103 c\u0103 virusul SARS-CoV-2 induce celule B de memorie, celule imunitare cu durat\u0103 lung\u0103 de via\u021b\u0103 care detecteaz\u0103 patogeni, creeaz\u0103 anticorpi pentru a-i distruge \u0219i \u00eei \u021bin minte pe viitor. Astfel c\u0103, data viitoare c\u00eend acel patogen \u00eencearc\u0103 s\u0103 intre \u00een corp, acele celule B de memorie se vor activa chiar mai rapid pentru a \u00eenl\u0103tura infec\u021bia. Av\u00eend \u00een vedere c\u0103 celulele B de memorie pot supravie\u021bui zeci de ani, acestea i-ar putea proteja pe\u00a0supravie\u021buitorii de COVID-19\u00a0pentru mult timp, \u00eens\u0103 pentru a confirma acest lucru s\u00eent necesare cercet\u0103ri mai am\u0103nun\u021bite.<\/p>\n
Noul studiu a fost f\u0103cut cu ajutorul mostrelor de s\u00eenge de la 26 de oameni care se recuperau \u00een urma infec\u021biilor u\u0219oare \u0219i moderate cu COVID-19, precum \u0219i 21 de mostre de la donatori s\u0103n\u0103to\u0219i care au fost colectate \u00een urm\u0103 cu 6 \u2013 10 ani, cu mult timp \u00eenainte s\u0103 fie expu\u0219i la COVID-19. Cu ajutorul acelor mostre, autorii studiului au m\u0103surat\u00a0nivelurile de celule\u00a0B de memorie \u0219i de anticorpi care vizeaz\u0103 p\u0103r\u021bi specifice din proteina S (S vine de la \u201eSpike\u201d, aspectul caracteristic, cu \u201e\u021bepi\u201d, al virusului). Aceast\u0103 protein\u0103 exist\u0103 \u00een toate coronavirusurile \u0219i este esen\u021bial\u0103 pentru infectarea celulelor.<\/p>\n
Proteina S arat\u0103 \u0219i se comport\u0103 diferit \u00een fiecare\u00a0coronavirus, dar una dintre componentele sale, subunitatea S2, r\u0103m\u00eene aproape la fel mereu. Celulele B de memorie nu pot diferen\u021bia \u00eentre subunit\u0103\u021bile S2 din coronavirusuri diferite, astfel c\u0103 le atac\u0103 f\u0103r\u0103 discriminare. Studiul a descoperit c\u0103 acest lucru este adev\u0103rat \u00een cazul betacoronavirusurilor, o subclas\u0103 care include dou\u0103 virusuri de r\u0103ceal\u0103 precum \u0219i SARS, MERS \u0219i SARS-CoV-2.<\/p>\n
Totu\u0219i, studiul nu arat\u0103 nivelul de protec\u021bie oferit de celulele B de memorie \u0219i modul \u00een care s\u0103n\u0103tatea pacientului este influen\u021bat\u0103.<\/p>\n
Acesta este urm\u0103torul pas. Va trebui s\u0103 vedem dac\u0103 aceste celule B de memorie au leg\u0103tur\u0103 cu simptomele mai u\u0219oare \u0219i durata mai scurt\u0103 o bolii sau dac\u0103 cresc eficien\u021ba vaccinurilor \u00eempotriva COVID-19, au spus cei de la laboratorul care a desf\u0103\u0219urat studiul.<\/p>\n","protected":false},"excerpt":{"rendered":"
R\u0103celile de sezon nu s\u00eent deloc distractive, \u00eens\u0103 noi cercet\u0103ri sugereaz\u0103 c\u0103 oamenii care au…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":"","covernews-slider-full":"","covernews-slider-center":"","covernews-featured":"","covernews-medium":"","covernews-medium-square":""},"author_info":{"display_name":"SAPTAMANA.md","author_link":"https:\/\/saptamana.md\/index.php\/author\/saptamana-md\/"},"category_info":"Coronavirus<\/a>","tag_info":"Coronavirus","comment_count":"0","_links":{"self":[{"href":"https:\/\/saptamana.md\/index.php\/wp-json\/wp\/v2\/posts\/1306"}],"collection":[{"href":"https:\/\/saptamana.md\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/saptamana.md\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/saptamana.md\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/saptamana.md\/index.php\/wp-json\/wp\/v2\/comments?post=1306"}],"version-history":[{"count":0,"href":"https:\/\/saptamana.md\/index.php\/wp-json\/wp\/v2\/posts\/1306\/revisions"}],"wp:attachment":[{"href":"https:\/\/saptamana.md\/index.php\/wp-json\/wp\/v2\/media?parent=1306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/saptamana.md\/index.php\/wp-json\/wp\/v2\/categories?post=1306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/saptamana.md\/index.php\/wp-json\/wp\/v2\/tags?post=1306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}