{"id":183564,"date":"2026-08-18T12:22:18","date_gmt":"2026-08-18T12:22:18","guid":{"rendered":"https:\/\/www.europesays.com\/cz\/183564\/"},"modified":"2026-08-18T12:22:18","modified_gmt":"2026-08-18T12:22:18","slug":"vedci-nasli-moznou-pricinu-alzheimerovy-choroby-zacina-uz-kolem-padesatky","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/cz\/183564\/","title":{"rendered":"V\u011bdci na\u0161li mo\u017enou p\u0159\u00ed\u010dinu Alzheimerovy choroby. Za\u010d\u00edn\u00e1 u\u017e kolem pades\u00e1tky"},"content":{"rendered":"

Alzheimerova choroba se zpravidla za\u010dne viditeln\u011b projevovat a\u017e ve vy\u0161\u0161\u00edm v\u011bku. Procesy, kter\u00e9 k n\u00ed mohou p\u0159isp\u00edvat, se ale podle nov\u00e9ho v\u00fdzkumu z\u0159ejm\u011b rozb\u00edhaj\u00ed o n\u011bkolik desetilet\u00ed d\u0159\u00edve. V\u011bdci zjistili, \u017ee p\u0159ibli\u017en\u011b od 50. roku \u017eivota doch\u00e1z\u00ed v hipokampu, tedy \u010d\u00e1sti mozku z\u00e1sadn\u00ed pro pam\u011b\u0165 a u\u010den\u00ed, k v\u00fdrazn\u00e9 prom\u011bn\u011b imunitn\u00edch bun\u011bk.\u00a0<\/p>\n

V\u00fdsledky mohou nab\u00eddnout nov\u00e9 vysv\u011btlen\u00ed jednoho z kl\u00ed\u010dov\u00fdch proces\u016f spojen\u00fdch se st\u00e1rnut\u00edm mozku. V\u011bdci u\u017e del\u0161\u00ed dobu v\u011bd\u00ed, \u017ee Alzheimerovu chorobu doprov\u00e1z\u00ed chronick\u00fd z\u00e1n\u011bt. Dosud ale nebylo zcela jasn\u00e9, pro\u010d se z\u00e1n\u011btliv\u00e9 prost\u0159ed\u00ed v mozku s p\u0159ib\u00fdvaj\u00edc\u00edm v\u011bkem vytv\u00e1\u0159\u00ed a odkud bu\u0148ky, kter\u00e9 jej podporuj\u00ed, poch\u00e1zej\u00ed.\u00a0<\/p>\n

Nov\u00fd v\u00fdzkum<\/a> nazna\u010duje, \u017ee vysv\u011btlen\u00ed m\u016f\u017ee souviset s p\u0159irozen\u00fdm st\u00e1rnut\u00edm organismu. Prom\u011bna p\u0159itom m\u016f\u017ee za\u010d\u00ednat dlouho p\u0159edt\u00edm, ne\u017e \u010dlov\u011bk zaznamen\u00e1 prvn\u00ed probl\u00e9my s pam\u011bt\u00ed.\u00a0<\/p>\n

Imunitn\u00ed bu\u0148ky mozku se za\u010d\u00ednaj\u00ed m\u011bnit<\/p>\n

V\u00fdzkumn\u00edci se zam\u011b\u0159ili na mikroglie, kter\u00e9 funguj\u00ed jako hlavn\u00ed imunitn\u00ed obrana centr\u00e1ln\u00edho nervov\u00e9ho syst\u00e9mu. Pom\u00e1haj\u00ed odstra\u0148ovat po\u0161kozen\u00e9 bu\u0148ky a dal\u0161\u00ed ne\u017e\u00e1douc\u00ed materi\u00e1l a pod\u00edlej\u00ed se na udr\u017eov\u00e1n\u00ed zdrav\u00e9ho prost\u0159ed\u00ed v mozku.\u00a0<\/p>\n

Dlouho p\u0159evl\u00e1dal n\u00e1zor, \u017ee tyto bu\u0148ky vznikaj\u00ed u\u017e b\u011bhem embryon\u00e1ln\u00edho v\u00fdvoje a n\u00e1sledn\u011b v mozku p\u0159etrv\u00e1vaj\u00ed po cel\u00fd \u017eivot, p\u0159i\u010dem\u017e svou populaci pr\u016fb\u011b\u017en\u011b obnovuj\u00ed. Nov\u00e1 studie v\u0161ak tento pohled zpochyb\u0148uje.\u00a0<\/p>\n

V\u011bdci analyzovali posmrtnou tk\u00e1\u0148 hipokampu 40 neurologicky zdrav\u00fdch lid\u00ed ve v\u011bku od 20 do 95 let. Zjistili, \u017ee p\u0159ibli\u017en\u011b mezi 50. a 75. rokem \u017eivota mno\u017estv\u00ed p\u016fvodn\u00edch mikrogli\u00ed postupn\u011b kles\u00e1.\u00a0<\/p>\n

\"P\u0159elomov\u00fd<\/a>P\u0159elomov\u00fd objev, kter\u00fd zm\u011bn\u00ed pohled na st\u00e1rnut\u00ed. Biologick\u00e9 hodiny funguj\u00ed jinak, ne\u017e se p\u0159edpokl\u00e1dalo<\/a><\/p>\n

Sou\u010dasn\u011b se v mozku objevuj\u00ed bu\u0148ky, kter\u00e9 vykazuj\u00ed siln\u011bj\u0161\u00ed z\u00e1n\u011btlivou aktivitu a sv\u00fdmi vlastnostmi p\u0159ipom\u00ednaj\u00ed monocyty. Ty se b\u011b\u017en\u011b nach\u00e1zej\u00ed v krvi. Jednou z mo\u017enost\u00ed je proto, \u017ee \u010d\u00e1st nov\u00fdch imunitn\u00edch bun\u011bk p\u0159ich\u00e1z\u00ed do st\u00e1rnouc\u00edho mozku pr\u00e1v\u011b z krevn\u00edho ob\u011bhu. Pokud dal\u0161\u00ed v\u00fdzkum tento mechanismus potvrd\u00ed, mohl by zm\u011bnit sou\u010dasn\u00e9 p\u0159edstavy o tom, jak imunitn\u00ed syst\u00e9m mozku b\u011bhem \u017eivota funguje.\u00a0<\/p>\n

Alzheimer nemus\u00ed za\u010d\u00ednat a\u017e s prvn\u00edmi p\u0159\u00edznaky<\/p>\n

Pr\u00e1v\u011b zv\u00fd\u0161en\u00e1 z\u00e1n\u011btliv\u00e1 aktivita je d\u016fle\u017eit\u00e1 kv\u016fli mo\u017en\u00e9 souvislosti s neurodegenerativn\u00edmi nemocemi. Z\u00e1n\u011bt pat\u0159\u00ed mezi procesy dlouhodob\u011b spojovan\u00e9 s Alzheimerovou chorobou<\/a>.\u00a0Nov\u00e9 v\u00fdsledky nazna\u010duj\u00ed, \u017ee prost\u0159ed\u00ed, kter\u00e9 m\u016f\u017ee rozvoji nemoci napom\u00e1hat, se vytv\u00e1\u0159\u00ed u\u017e v r\u00e1mci b\u011b\u017en\u00e9ho st\u00e1rnut\u00ed.\u00a0<\/p>\n

V\u00fdsledky neznamenaj\u00ed, \u017ee zm\u011bny v mozku po pades\u00e1tce automaticky vedou k Alzheimerov\u011b chorob\u011b. Mohou ale pomoci vysv\u011btlit, pro\u010d je mozek s p\u0159ib\u00fdvaj\u00edc\u00edm v\u011bkem n\u00e1chyln\u011bj\u0161\u00ed k nemocem spojen\u00fdm s pam\u011bt\u00ed a dal\u0161\u00edmi funkcemi. V\u011bdci z\u00e1rove\u0148 zjistili, \u017ee postupn\u011b sl\u00e1bne funkce n\u011bkter\u00fdch bun\u011bk, kter\u00e9 pom\u00e1haj\u00ed chr\u00e1nit mozek p\u0159ed ne\u017e\u00e1douc\u00edmi l\u00e1tkami z krve.\u00a0<\/p>\n

S v\u011bkem se podle studie m\u011bn\u00ed tak\u00e9 fungov\u00e1n\u00ed dal\u0161\u00edch mozkov\u00fdch bun\u011bk. Ub\u00fdv\u00e1 nap\u0159\u00edklad bun\u011bk, kter\u00e9 pom\u00e1haj\u00ed neuron\u016fm spr\u00e1vn\u011b pracovat a zaji\u0161\u0165uj\u00ed jim pot\u0159ebnou podporu. Modern\u00ed metody nav\u00edc v\u011bdc\u016fm umo\u017enily sledovat tyto zm\u011bny mnohem podrobn\u011bji ne\u017e d\u0159\u00edve. V\u00fdzkum tak ukazuje, \u017ee st\u00e1rnut\u00ed mozku je slo\u017eit\u00fd proces, kter\u00fd m\u016f\u017ee za\u010d\u00ednat dlouho p\u0159edt\u00edm, ne\u017e \u010dlov\u011bk zaznamen\u00e1 prvn\u00ed probl\u00e9my s pam\u011bt\u00ed.\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"Alzheimerova choroba se zpravidla za\u010dne viditeln\u011b projevovat a\u017e ve vy\u0161\u0161\u00edm v\u011bku. Procesy, kter\u00e9 k n\u00ed mohou p\u0159isp\u00edvat, se…\n","protected":false},"author":2,"featured_media":183565,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0"},"categories":[11],"tags":[14789,665,19316,394,54,4095,53,52],"class_list":["post-183564","post","type-post","status-publish","format-standard","has-post-thumbnail","category-svet","tag-alzheimerova-choroba","tag-nemoc","tag-senilita","tag-starnuti","tag-svet","tag-vyzkum","tag-world","tag-world-news"],"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@cz\/117116491810316405","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts\/183564","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/comments?post=183564"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts\/183564\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/media\/183565"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/media?parent=183564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/categories?post=183564"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/tags?post=183564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}