{"id":710535,"date":"2026-08-29T03:57:03","date_gmt":"2026-08-29T03:57:03","guid":{"rendered":"https:\/\/microscopemedia.com\/?p=710535"},"modified":"2026-08-29T03:57:03","modified_gmt":"2026-08-29T03:57:03","slug":"vaccinul-impotriva-dementei-pe-care-unii-oameni-il-fac-fara-sa-stie","status":"publish","type":"post","link":"https:\/\/microscopemedia.com\/?p=710535","title":{"rendered":"Vaccinul \u00eempotriva demen\u021bei pe care unii oameni \u00eel fac f\u0103r\u0103 s\u0103 \u0219tie"},"content":{"rendered":"
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Peste 55 de milioane de oameni tr\u0103iesc \u00een prezent cu demen\u021b\u0103 la nivel mondial, iar num\u0103rul acestora este estimat s\u0103 ajung\u0103 la aproape 140 de milioane p\u00e2n\u0103 \u00een 2050. \u00cen acela\u0219i timp, costurile \u00eengrijirii persoanelor afectate ar putea ajunge la aproximativ 1% din PIB-ul global.<\/p>\n

Tratamentele disponibile \u00een prezent au efecte limitate. Unele medicamente pot \u00eembun\u0103t\u0103\u021bi memoria sau pot \u00eencetini declinul cognitiv \u00een anumite cazuri, \u00eens\u0103, atunci c\u00e2nd apar simptomele, leziunile cerebrale sunt adesea deja extinse \u0219i ireversibile.<\/p>\n

Un \u201eexperiment natural\u201d nea\u0219teptat<\/h2>\n

\u00cen 2013, autorit\u0103\u021bile galeze au introdus un program na\u021bional prin care persoanele \u00een v\u00e2rst\u0103 de 70 de ani primeau vaccinul \u00eempotriva zonei zoster. Programul a avut \u00eens\u0103 o particularitate care avea s\u0103 devin\u0103 extrem de important\u0103 pentru cercet\u0103tori: vaccinul era oferit \u00een func\u021bie de o limit\u0103 precis\u0103 de v\u00e2rst\u0103, scrie Science Focus<\/a>. Persoanele care \u00eemplineau 70 de ani \u00eencep\u00e2nd cu 1 septembrie 2013 erau eligibile, \u00een timp ce cele care \u00eempliniser\u0103 70 de ani cu pu\u021bin timp \u00eenainte nu primeau vaccinul \u00een cadrul programului.<\/p>\n

Aceast\u0103 diferen\u021b\u0103 a creat ceea ce cercet\u0103torii numesc un \u201eexperiment natural\u201d. Practic, persoanele aflate de o parte \u0219i de alta a limitei de v\u00e2rst\u0103 puteau fi comparate, deoarece diferen\u021ba principal\u0103 dintre grupuri era faptul c\u0103 unele fuseser\u0103 eligibile pentru vaccin.<\/p>\n

\u00cen 2025, epidemiologul Pascal Geldsetzer \u0219i colegii s\u0103i au analizat datele \u0219i au f\u0103cut o observa\u021bie important\u0103: persoanele c\u0103rora li se oferise vaccinul \u00eempotriva zonei zoster aveau cu aproximativ 20% mai pu\u021bine \u0219anse s\u0103 dezvolte demen\u021b\u0103. Pentru cercetarea \u00een domeniul demen\u021bei, o diferen\u021b\u0103 de aceast\u0103 amploare este considerat\u0103 semnificativ\u0103.<\/p>\n

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3D render of a medical figure with brain highlighted<\/p>\n<\/div>\n

Vaccinul ar putea avea efecte \u0219i dup\u0103 apari\u021bia bolii<\/h2>\n

Cercet\u0103rile ulterioare au ridicat o alt\u0103 ipotez\u0103. Vaccinarea nu ar putea doar s\u0103 reduc\u0103 riscul de apari\u021bie a demen\u021bei, ci ar putea fi asociat\u0103 \u0219i cu o \u00eencetinire a progresiei bolii la persoanele deja diagnosticate.<\/p>\n

Rezultatele au fost raportate \u0219i \u00een alte \u021b\u0103ri, printre care Anglia, Sco\u021bia, Canada \u0219i Australia, ceea ce a \u00eent\u0103rit interesul oamenilor de \u0219tiin\u021b\u0103.<\/p>\n

Totu\u0219i, cercet\u0103torii subliniaz\u0103 c\u0103 aceste rezultate nu \u00eenseamn\u0103 \u00eenc\u0103 existen\u021ba unui \u201evaccin \u00eempotriva demen\u021bei\u201d demonstrat definitiv. Sunt necesare studii clinice suplimentare pentru a stabili dac\u0103 vaccinul are \u00eentr-adev\u0103r un efect direct asupra bolii \u0219i care este mecanismul din spatele acestei posibile protec\u021bii.<\/p>\n

Leg\u0103tura cu virusurile herpetice<\/h2>\n

Ipoteza are \u0219i o explica\u021bie biologic\u0103 posibil\u0103. \u00cenc\u0103 din anii 1990, cercet\u0103torii au identificat ADN-ul virusului herpes simplex de tip 1 (HSV-1), responsabil de apari\u021bia herpesului labial, \u00een celulele cerebrale ale unor persoane \u00een v\u00e2rst\u0103. Ulterior, mai multe studii au sugerat o asociere \u00eentre infec\u021biile herpetice \u0219i riscul de Alzheimer. Cercet\u0103torii investigheaz\u0103 inclusiv posibilitatea ca inflama\u021bia provocat\u0103 de virusuri sau reac\u021bia sistemului imunitar s\u0103 contribuie la procesele neurodegenerative.<\/p>\n

Vaccinul \u00eempotriva zonei zoster este, astfel, analizat nu doar prin prisma protec\u021biei \u00eempotriva unei infec\u021bii dureroase, ci \u0219i pentru posibile efecte asupra s\u0103n\u0103t\u0103\u021bii creierului.<\/p>\n

O posibil\u0103 nou\u0103 direc\u021bie \u00een prevenirea demen\u021bei<\/h2>\n

Cercet\u0103torii dezvolt\u0103 \u00een paralel vaccinuri \u0219i imunoterapii concepute special pentru Alzheimer \u0219i alte boli neurodegenerative. Unele dintre acestea urm\u0103resc eliminarea proteinelor toxice care se acumuleaz\u0103 \u00een creier, \u00een timp ce alte abord\u0103ri \u00eencearc\u0103 s\u0103 controleze inflama\u021bia \u0219i factorii infec\u021bio\u0219i care ar putea contribui la apari\u021bia bolii.<\/p>\n

Un studiu recent, realizat de cercet\u0103tori de la Universitatea Ebraic\u0103 din Ierusalim \u0219i aflat \u00eenc\u0103 \u00een a\u0219teptarea evalu\u0103rii inter pares la momentul relat\u0103rii, a indicat c\u0103 pacien\u021bii cu Alzheimer c\u0103rora li s-a administrat un vaccin \u00een dou\u0103 doze, la un interval de patru s\u0103pt\u0103m\u00e2ni, \u0219i-au men\u021binut mai stabil func\u021biile cognitive dec\u00e2t pacien\u021bii nevaccina\u021bi.<\/p>\n

Dac\u0103 aceste rezultate vor fi confirmate de cercet\u0103ri ulterioare, vaccinarea ar putea deveni o direc\u021bie important\u0103 \u00een \u00eencercarea de a preveni sau \u00eencetini demen\u021ba.<\/p>\n

Deocamdat\u0103, \u00eens\u0103, speciali\u0219tii avertizeaz\u0103 c\u0103 dovezile sunt promi\u021b\u0103toare, dar nu demonstreaz\u0103 c\u0103 vaccinul \u00eempotriva zonei zoster poate preveni sau trata demen\u021ba. Cercet\u0103rile continu\u0103 pentru a afla dac\u0103 asocierea observat\u0103 este \u00eentr-adev\u0103r cauzal\u0103 \u0219i dac\u0103 vaccinurile pot deveni, \u00een viitor, o arm\u0103 \u00eempotriva uneia dintre cele mai dificile boli ale \u00eemb\u0103tr\u00e2nirii.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Peste 55 de milioane de oameni tr\u0103iesc \u00een prezent cu demen\u021b\u0103 la nivel mondial, iar num\u0103rul acestora este estimat s\u0103 ajung\u0103 la aproape 140 de milioane p\u00e2n\u0103 \u00een 2050. \u00cen … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":710536,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"Default","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/710535"}],"collection":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=710535"}],"version-history":[{"count":0,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/710535\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/media\/710536"}],"wp:attachment":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=710535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=710535"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=710535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}