Nosn\u00ed sprej je zn\u00e1m\u00fd jako zp\u016fsob pod\u00e1n\u00ed p\u0159\u00edpravk\u016f do nosu, ale ve farmaceutick\u00e9m v\u00fdzkumu m\u00e1 i \u0161ir\u0161\u00ed roli. Nosn\u00ed sliznice je bohat\u011b prokrven\u00e1, snadno dostupn\u00e1 a nach\u00e1z\u00ed se v bezprost\u0159edn\u00ed bl\u00edzkosti cest spojuj\u00edc\u00edch nosn\u00ed dutinu s centr\u00e1ln\u00edm nervov\u00fdm syst\u00e9mem. Proto se nosn\u00ed pod\u00e1n\u00ed ji\u017e roky zkoum\u00e1 jako mo\u017en\u00e1 cesta pro peptidy a dal\u0161\u00ed molekuly, kter\u00e9 se obt\u00ed\u017en\u011b vst\u0159eb\u00e1vaj\u00ed z tr\u00e1vic\u00edho traktu.<\/p>\n
To ov\u0161em neznamen\u00e1, \u017ee se ka\u017ed\u00e1 peptidov\u00e1 kapalina vlo\u017een\u00e1 do l\u00e1hve s rozpra\u0161ova\u010dem automaticky st\u00e1v\u00e1 spolehliv\u00fdm nosn\u00edm produktem. U peptid\u016f p\u0159edstavuj\u00ed formulace, stabilita a kontrola d\u00e1vky centr\u00e1ln\u00ed \u010d\u00e1st probl\u00e9mu.<\/p>\n
Peptidy jsou \u0159et\u011bzce aminokyselin, tak\u017ee je tr\u00e1vic\u00ed syst\u00e9m \u010dasto rozpozn\u00e1 jako materi\u00e1l k rozkladu. Kysel\u00e9 prost\u0159ed\u00ed \u017ealudku a proteolytick\u00e9 enzymy je mohou rozlo\u017eit d\u0159\u00edve, ne\u017e se dostanou do krevn\u00edho \u0159e\u010di\u0161t\u011b. Krom\u011b toho je mnoho peptid\u016f pom\u011brn\u011b velk\u00fdmi a hydrofiln\u00edmi molekulami, kter\u00e9 obt\u00ed\u017en\u011b proch\u00e1zej\u00ed bun\u011b\u010dn\u00fdmi membr\u00e1nami.<\/p>\n
Injek\u010dn\u00ed pod\u00e1n\u00ed tyto p\u0159ek\u00e1\u017eky obch\u00e1z\u00ed, ale je invazivn\u00ed. Proto se zkoumaj\u00ed alternativn\u00ed cesty \u2013 pl\u00edcn\u00ed, transderm\u00e1ln\u00ed, buk\u00e1ln\u00ed, sublingv\u00e1ln\u00ed<\/a> a nosn\u00ed.<\/p>\n Nosn\u00ed dutina je vystl\u00e1na sliznic\u00ed s velk\u00fdm po\u010dtem krevn\u00edch c\u00e9v. Molekula, kter\u00e1 z\u016fstane ve formulaci stabiln\u00ed a projde epitelem, se m\u016f\u017ee dostat do syst\u00e9mov\u00e9ho ob\u011bhu. V horn\u00edch \u010d\u00e1stech nosu se nach\u00e1zej\u00ed i \u010dichov\u00e9 cesty, zat\u00edmco trojklann\u00fd nerv poskytuje dal\u0161\u00ed anatomick\u00e9 spojen\u00ed mezi nosn\u00ed oblast\u00ed a centr\u00e1ln\u00edm nervov\u00fdm syst\u00e9mem.<\/p>\n Na tomto z\u00e1klad\u011b vznikl koncept dod\u00e1n\u00ed \u201enose-to-brain\u201c. V\u00fdzkumy ukazuj\u00ed, \u017ee ur\u010dit\u00e9 l\u00e1tky mohou za vhodn\u00fdch podm\u00ednek vyu\u017e\u00edt \u010dichovou a trigemin\u00e1ln\u00ed cestu. P\u0159esto b\u00fdv\u00e1 \u00fa\u010dinnost n\u00edzk\u00e1 a prom\u011bnliv\u00e1 a velk\u00e1 \u010d\u00e1st pod\u00e1van\u00e9ho mno\u017estv\u00ed m\u016f\u017ee skon\u010dit v hltanu a b\u00fdt spolknuta.<\/p>\n Tyto v\u00fdhody popisuj\u00ed potenci\u00e1l cesty pod\u00e1n\u00ed, ne zaru\u010den\u00fd \u00fa\u010dinek konkr\u00e9tn\u00edho peptidu.<\/p>\n Nos neust\u00e1le odstra\u0148uje \u010d\u00e1stice a sekret. \u0158asinky epitelu posouvaj\u00ed hlen sm\u011brem k hltanu, co\u017e zkracuje dobu kontaktu formulace se sliznic\u00ed. Pokud je kontakt kr\u00e1tk\u00fd, m\u016f\u017ee b\u00fdt omezen\u00e9 i vst\u0159eb\u00e1v\u00e1n\u00ed.<\/p>\n Nosn\u00ed sliznice nen\u00ed pasivn\u00ed membr\u00e1na. Nach\u00e1zej\u00ed se v n\u00ed enzymy, kter\u00e9 mohou peptidy m\u011bnit nebo rozkl\u00e1dat. Stabilita v l\u00e1hvi proto nen\u00ed jedinou d\u016fle\u017eitou stabilitou \u2013 z\u00e1le\u017e\u00ed i na tom, co se d\u011bje po kontaktu s tk\u00e1n\u00ed.<\/p>\n Nosn\u00ed dutina p\u0159ijme jen mal\u00e9 mno\u017estv\u00ed kapaliny. P\u0159\u00edli\u0161 velk\u00fd objem zvy\u0161uje vyt\u00e9k\u00e1n\u00ed a polyk\u00e1n\u00ed, zat\u00edmco tvar proudu, velikost kapek a anatomie nosu ovliv\u0148uj\u00ed m\u00edsto usazen\u00ed. Ucpan\u00fd nos, z\u00e1n\u011bt sliznice a individu\u00e1ln\u00ed anatomick\u00e9 rozd\u00edly v\u00fdsledek d\u00e1le m\u011bn\u00ed.<\/p>\n Peptid m\u016f\u017ee b\u00fdt chemicky nestabiln\u00ed mimo ur\u010dit\u00fd rozsah pH. Na druh\u00e9 stran\u011b mus\u00ed b\u00fdt formulace p\u0159ijateln\u00e1 pro nosn\u00ed sliznici. Pufry, konzervanty a prost\u0159edky pro zlep\u0161en\u00ed permeace mohou ovlivnit stabilitu i sn\u00e1\u0161enlivost.<\/p>\n Pro opakovatelnost je d\u016fle\u017eit\u00e9, kolik kapaliny za\u0159\u00edzen\u00ed dod\u00e1 jedn\u00edm stiskem a zda se toto mno\u017estv\u00ed b\u011bhem pou\u017e\u00edv\u00e1n\u00ed m\u011bn\u00ed. Laboratorn\u00ed \u00fadaje z\u00edskan\u00e9 p\u0159esn\u00fdm za\u0159\u00edzen\u00edm nelze automaticky p\u0159en\u00e9st na ka\u017ed\u00fd komer\u010dn\u00ed rozpra\u0161ova\u010d.<\/p>\n Semax<\/a> byl ve v\u00edce experiment\u00e1ln\u00edch prac\u00edch zkoum\u00e1n intranaz\u00e1ln\u011b, v\u010detn\u011b v\u00fdzkum\u016f zm\u011bn neurotrofn\u00edch faktor\u016f. Orexin-A byl zkoum\u00e1n u osob s narkolepsi\u00ed, kde mal\u00e9 kontrolovan\u00e9 studie zaznamenaly zm\u011bny v REM sp\u00e1nku a v n\u011bkter\u00fdch \u00faloh\u00e1ch pozornosti. Nosn\u00ed pod\u00e1n\u00ed Orexinu-A bylo zkoum\u00e1no i ve zv\u00ed\u0159ec\u00edch modelech sp\u00e1nkov\u00e9 deprivace.<\/p>\n D\u016fle\u017eit\u00e9 je, \u017ee jde o ur\u010dit\u00e9 l\u00e1tky, ur\u010dit\u00e9 formulace a kontrolovan\u00e9 protokoly. Nep\u0159edstavuj\u00ed d\u016fkaz, \u017ee je nosn\u00ed cesta stejn\u011b \u00fa\u010dinn\u00e1 pro v\u0161echny peptidy.<\/p>\n U n\u011bkter\u00fdch v\u00fdzkumn\u00fdch peptidov\u00fdch sad se aktivn\u00ed slo\u017eka, odpov\u00eddaj\u00edc\u00ed rozpou\u0161t\u011bdlo a za\u0159\u00edzen\u00ed pro rozpra\u0161ov\u00e1n\u00ed nach\u00e1zej\u00ed odd\u011blen\u011b. D\u016fvodem je, \u017ee peptidy v such\u00e9 form\u011b mohou m\u00edt jin\u00fd profil stability ne\u017e v roztoku, zat\u00edmco za\u0159\u00edzen\u00ed pro pod\u00e1n\u00ed m\u00e1 vlastn\u00ed funkci.<\/p>\n Peptidov\u00fd komplex SORA Focus<\/a> je p\u0159edstaven jako sada s lahvi\u010dkou obsahuj\u00edc\u00ed kombinaci Semaxu, Pinealonu, Orexinu-A a Selanku, l\u00e1hv\u00ed bakteriostatick\u00e9 vody a pr\u00e1zdnou l\u00e1hv\u00ed s nosn\u00edm rozpra\u0161ova\u010dem. Tento popis vysv\u011btluje obsah sady, ale nep\u0159edstavuje n\u00e1vod k p\u0159\u00edprav\u011b, d\u00e1vkov\u00e1n\u00ed ani samostatn\u00e9mu l\u00e9ka\u0159sk\u00e9mu pou\u017eit\u00ed.<\/p>\n Nosn\u00ed pod\u00e1n\u00ed je v\u00e1\u017enou oblast\u00ed farmaceutick\u00e9ho v\u00fdzkumu, zejm\u00e9na pro molekuly, kter\u00e9 se obt\u00ed\u017en\u011b pod\u00e1vaj\u00ed klasickou or\u00e1ln\u00ed cestou. Potenci\u00e1l vypl\u00fdv\u00e1 z dob\u0159e prokrven\u00e9 sliznice a z anatomick\u00e9ho spojen\u00ed nosu s nervov\u00fdm syst\u00e9mem. Omezen\u00ed jsou stejn\u011b d\u016fle\u017eit\u00e1: kr\u00e1tk\u00e1 doba setrv\u00e1n\u00ed, enzymatick\u00fd rozklad, mal\u00fd dostupn\u00fd objem, prom\u011bnlivost za\u0159\u00edzen\u00ed a pot\u0159eba p\u0159esn\u00e9 formulace.<\/p>\n Proto v\u00fdraz \u201enosn\u00ed peptidov\u00fd sprej\u201c popisuje form\u00e1t pod\u00e1n\u00ed, ale s\u00e1m o sob\u011b nepotvrzuje biologickou dostupnost, \u00fa\u010dinnost ani bezpe\u010dnost konkr\u00e9tn\u00edho produktu.<\/p>\n Pro\u010d se nosn\u00ed pod\u00e1n\u00ed peptid\u016f zkoum\u00e1, jak funguje nosn\u00ed sliznice a kter\u00e9 faktory omezuj\u00ed spolehlivost peptidov\u00e9ho spreje.<\/p>\n","protected":false},"author":1,"featured_media":31130,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[227],"tags":[],"class_list":["post-31129","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-peptidy"],"_links":{"self":[{"href":"https:\/\/sorapeptides.com\/cs\/wp-json\/wp\/v2\/posts\/31129","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sorapeptides.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sorapeptides.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sorapeptides.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sorapeptides.com\/cs\/wp-json\/wp\/v2\/comments?post=31129"}],"version-history":[{"count":3,"href":"https:\/\/sorapeptides.com\/cs\/wp-json\/wp\/v2\/posts\/31129\/revisions"}],"predecessor-version":[{"id":32611,"href":"https:\/\/sorapeptides.com\/cs\/wp-json\/wp\/v2\/posts\/31129\/revisions\/32611"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sorapeptides.com\/cs\/wp-json\/wp\/v2\/media\/31130"}],"wp:attachment":[{"href":"https:\/\/sorapeptides.com\/cs\/wp-json\/wp\/v2\/media?parent=31129"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sorapeptides.com\/cs\/wp-json\/wp\/v2\/categories?post=31129"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sorapeptides.com\/cs\/wp-json\/wp\/v2\/tags?post=31129"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Co se d\u011bje na nosn\u00ed sliznici?<\/h2>\n
Hlavn\u00ed v\u00fdhody nosn\u00ed cesty<\/h2>\n
\n
Pro\u010d je skute\u010dn\u00e9 dod\u00e1n\u00ed slo\u017eit\u011bj\u0161\u00ed, ne\u017e se zd\u00e1?<\/h2>\n
Mukocili\u00e1rn\u00ed o\u010di\u0161\u0165ov\u00e1n\u00ed<\/h3>\n
Enzymatick\u00fd rozklad<\/h3>\n
Objem a m\u00edsto rozpr\u00e1\u0161en\u00ed<\/h3>\n
pH, osmolalita a pomocn\u00e9 l\u00e1tky<\/h3>\n
P\u0159esnost rozpra\u0161ova\u010de<\/h3>\n
P\u0159\u00edklady z v\u00fdzkumu Semaxu a Orexinu-A<\/h2>\n
Pro\u010d se peptidov\u00e1 sada sklad\u00e1 z v\u00edce \u010d\u00e1st\u00ed?<\/h2>\n
Z\u00e1v\u011br<\/h2>\n
Zdroje<\/h2>\n
\n