![\"gama](\"https:\/\/www.synevo.ro\/wp-content\/uploads\/2021\/04\/gama-de-peptide-300x72.png\")
<\/p>\n
Figur\u0103 1. Stimularea se efectueaz\u0103 cu o \u201egama de peptide\u201d de 158 peptide suprapuse, de la cap\u0103tul N-terminal, respectiv 157 peptide de la cap\u0103tul C-terminal.<\/p>\n
Peptidele de la cap\u0103tul N-terminal au specificitate \u00eenalt\u0103 pentru SARS-CoV-2, \u00een timp ce cele de la cap\u0103tul C-terminal prezint\u0103 omologii mai mari cu alte beta coronavirusuri. O reac\u021bie izolat\u0103 fa\u0163\u0103 de peptidele de la cap\u0103tul C-terminal este asociat\u0103 cu reactivitatea \u00eencruci\u0219at\u0103 la alte beta coronavirusuri. Persoanele infectate cu SARS-CoV-2 (PCR-pozitiv) prezint\u0103 o reactivitate clar\u0103 at\u00e2t la peptidele de la cap\u0103tul N-terminal c\u00e2t \u0219i la cele de la cap\u0103tul C-terminal, chiar \u0219i la 5 luni dup\u0103 infec\u021bie.Figur\u0103 1. Stimularea se efectueaz\u0103 cu o \u201egama de peptide\u201d de 158 peptide suprapuse, de la cap\u0103tul N-terminal, respectiv 157 peptide de la cap\u0103tul C-terminal.<\/p>\n
![\"limfocitele](\"https:\/\/www.synevo.ro\/wp-content\/uploads\/2021\/04\/limfocitele-T-catre-peptide-300x177.jpg\")
<\/p>\n
Figur\u0103 2 Reprezentarea activ\u0103rii limfocitelor T de c\u0103tre peptide: Cel mai important semnal pentru activarea unei celule este recunoa\u0219terea specific\u0103 a unui peptid de c\u0103tre receptorul specific (TCR).<\/p>\n
Recomand\u0103ri de testare<\/h2>\n\n- Suspiciune de infec\u021bie \u00een antecedente, f\u0103r\u0103 rezultat pozitiv la serologie;<\/li>\n
- Pacien\u021bi cu PCR pozitiv, dar f\u0103r\u0103 anticorpi detectabili;<\/li>\n
- Persoane vaccinate care nu au dezvoltat anticorpi.<\/li>\n<\/ul>\n
Specimen recoltat<\/strong> \u2013 s\u00e2nge venos.<\/p>\nRecipient de recoltare<\/strong> \u2013 vacutainer cu heparinat de litiu; vacutainer f\u0103r\u0103 anticoagulant cu gel activator.<\/p>\nVolum proba<\/strong> \u2013 20 mL s\u00e2nge heparinat si 5 mL ser.<\/p>\nStabilitate proba <\/strong>\u2013 s\u00e2ngele trebuie s\u0103 ajung\u0103 \u00een max. 24 ore <\/strong>la laboratorul la care se efectueaz\u0103 testul \u015fi \u00een aceasta perioad\u0103 se p\u0103streaz\u0103 la temperatura camerei. Este contraindicat<\/u>\u0103 refrigerarea<\/u> probei<\/u>.<\/p>\nCauze de respingere a probei<\/strong>\u00a0\u2013 specimene care au dep\u0103\u015fit intervalul de stabilitate, probe refrigerate sau congelate.<\/p>\nMetoda<\/strong> \u2013 \u00eencorporarea unui nucleozid radioactiv (timidina) \u00een ADN-ul celular.<\/p>\nInterpretarea rezultatelor LTT \u2013 virusul SARS-COV-2<\/h2>\n
R\u0103spunsul imun celular mediat de limfocitele T confer\u0103 un grad de protec\u021bie fa\u0163\u0103 de virus. Aproximativ 10% dintre pacien\u021bii simptomatici \u015fi cca. 40% dintre cei asimptomatici prezint\u0103 niveluri sc\u0103zute de anticorpi dup\u0103 o perioada mai \u00eendelungat\u0103 de la infec\u0163ie. Demonstrarea reactivit\u0103\u021bii celulare fa\u0163\u0103 de virus r\u0103m\u00e2ne singura metoda de confirmare a infec\u021biei \u00een antecedente la ace\u0219ti pacien\u021bi. Persoanele infectate cu SARS-CoV-2 (PCR-pozitiv)<\/a> prezint\u0103 o reactivitate clar\u0103 la amestecul de peptide, rezultatele men\u0163in\u00e2ndu-se pozitive p\u00e2n\u0103 la 5 luni dup\u0103 infec\u021bie.<\/p>\nUnele persoane neinfectate pot prezenta reactivitate doar fa\u0163\u0103 de peptidele de la cap\u0103tul C- terminal. Aceasta reactivitate arat\u0103 contactul anterior cu alte coronavirusuri endemice (229E, OC43, NL63 si HUK1). Unele studii, aflate \u00eenc\u0103 in derulare, par s\u0103 indice o imunitate par\u021bial\u0103 fa\u0163\u0103 de SARS-CoV-2 la ace\u0219ti pacien\u021bi, ceea ce se coreleaz\u0103 cu forme asimptomatice sau u\u0219oare la unii pacien\u021bi. Aceste informa\u021bii trebuie \u00eens\u0103 confirmate \u00een studii clinice care s\u0103 includ\u0103 un num\u0103r mare de pacien\u0163i1; 2; 3; 4.<\/p>\n
<\/h6>\nBibliografie<\/h2>\n\n- Why does the coronavirus spread so easily between people? Mallapaty , Nature, 579, 2020<\/li>\n
- Antibody responses to SARS-CoV-2 in patients with COVID-19 Quan-Xin Long, Bai- Zhong Liu, Ai-Long Huang, Nature Medicine volume 26, 2020<\/li>\n
- Virus-Specific Memory CD8 T Cells Provide Substantial Protection from Lethal Severe Acute Respiratory Syndrome Coronavirus Infection Rudragouda Channappanavar, Craig Fett, Jincun Zhao, David K. Meyerholz, and Stanley Perlman, J , 2014<\/li>\n
- SARS-CoV-2-reactive T cells in healthy donors and patients with COVID-19, Julian Braun, Lucie Loyal, Andreas Thiel, Nature, 2020<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"
Informatii generale \u2013 LTT SARS-COV-2 P\u00e2n\u0103 \u00een prezent, diagnosticul de laborator pentru evaluarea imunit\u0103\u0163ii dup\u0103 COVID-19 a fost bazat doar pe dozarea anticorpilor produ\u015fi \u00eempotriva virusul SARS-CoV-2. Anticorpii pot preveni sau limita infec\u021bia, elimin\u00e2nd agen\u0163ii patogeni prin efect de neutralizare. Cu toate acestea, nu to\u021bi pacien\u021bii dezvolt\u0103 o cantitate m\u0103surabil\u0103 de anticorpi dup\u0103 expunerea la […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[96],"product_tag":[],"class_list":["post-250","product","type-product","status-publish","product_cat-testul-de-transformare-limfoblastica-ltt","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/product\/250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/media?parent=250"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/product_brand?post=250"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/product_cat?post=250"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/product_tag?post=250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Specimen recoltat<\/strong> \u2013 s\u00e2nge venos.<\/p>\n Recipient de recoltare<\/strong> \u2013 vacutainer cu heparinat de litiu; vacutainer f\u0103r\u0103 anticoagulant cu gel activator.<\/p>\n Volum proba<\/strong> \u2013 20 mL s\u00e2nge heparinat si 5 mL ser.<\/p>\n Stabilitate proba <\/strong>\u2013 s\u00e2ngele trebuie s\u0103 ajung\u0103 \u00een max. 24 ore <\/strong>la laboratorul la care se efectueaz\u0103 testul \u015fi \u00een aceasta perioad\u0103 se p\u0103streaz\u0103 la temperatura camerei. Este contraindicat<\/u>\u0103 refrigerarea<\/u> probei<\/u>.<\/p>\n Cauze de respingere a probei<\/strong>\u00a0\u2013 specimene care au dep\u0103\u015fit intervalul de stabilitate, probe refrigerate sau congelate.<\/p>\n Metoda<\/strong> \u2013 \u00eencorporarea unui nucleozid radioactiv (timidina) \u00een ADN-ul celular.<\/p>\n R\u0103spunsul imun celular mediat de limfocitele T confer\u0103 un grad de protec\u021bie fa\u0163\u0103 de virus. Aproximativ 10% dintre pacien\u021bii simptomatici \u015fi cca. 40% dintre cei asimptomatici prezint\u0103 niveluri sc\u0103zute de anticorpi dup\u0103 o perioada mai \u00eendelungat\u0103 de la infec\u0163ie. Demonstrarea reactivit\u0103\u021bii celulare fa\u0163\u0103 de virus r\u0103m\u00e2ne singura metoda de confirmare a infec\u021biei \u00een antecedente la ace\u0219ti pacien\u021bi. Persoanele infectate cu SARS-CoV-2 (PCR-pozitiv)<\/a> prezint\u0103 o reactivitate clar\u0103 la amestecul de peptide, rezultatele men\u0163in\u00e2ndu-se pozitive p\u00e2n\u0103 la 5 luni dup\u0103 infec\u021bie.<\/p>\n Unele persoane neinfectate pot prezenta reactivitate doar fa\u0163\u0103 de peptidele de la cap\u0103tul C- terminal. Aceasta reactivitate arat\u0103 contactul anterior cu alte coronavirusuri endemice (229E, OC43, NL63 si HUK1). Unele studii, aflate \u00eenc\u0103 in derulare, par s\u0103 indice o imunitate par\u021bial\u0103 fa\u0163\u0103 de SARS-CoV-2 la ace\u0219ti pacien\u021bi, ceea ce se coreleaz\u0103 cu forme asimptomatice sau u\u0219oare la unii pacien\u021bi. Aceste informa\u021bii trebuie \u00eens\u0103 confirmate \u00een studii clinice care s\u0103 includ\u0103 un num\u0103r mare de pacien\u0163i1; 2; 3; 4.<\/p>\n Informatii generale \u2013 LTT SARS-COV-2 P\u00e2n\u0103 \u00een prezent, diagnosticul de laborator pentru evaluarea imunit\u0103\u0163ii dup\u0103 COVID-19 a fost bazat doar pe dozarea anticorpilor produ\u015fi \u00eempotriva virusul SARS-CoV-2. Anticorpii pot preveni sau limita infec\u021bia, elimin\u00e2nd agen\u0163ii patogeni prin efect de neutralizare. Cu toate acestea, nu to\u021bi pacien\u021bii dezvolt\u0103 o cantitate m\u0103surabil\u0103 de anticorpi dup\u0103 expunerea la […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[96],"product_tag":[],"class_list":["post-250","product","type-product","status-publish","product_cat-testul-de-transformare-limfoblastica-ltt","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/product\/250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/media?parent=250"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/product_brand?post=250"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/product_cat?post=250"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/analizesanocare.ro\/en\/wp-json\/wp\/v2\/product_tag?post=250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Interpretarea rezultatelor LTT \u2013 virusul SARS-COV-2<\/h2>\n
<\/h6>\n
Bibliografie<\/h2>\n
\n