{"id":17203,"date":"2026-09-16T00:12:57","date_gmt":"2026-09-15T22:12:57","guid":{"rendered":"https:\/\/blog.weareprovital.com\/what-is-loss-of-proteostasis-aging-2\/"},"modified":"2026-09-16T01:20:30","modified_gmt":"2026-09-15T23:20:30","slug":"perda-proteostase-envelhecimento","status":"publish","type":"post","link":"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/","title":{"rendered":"Perda da proteostase: os tr\u00eas pilares que se deterioram com o envelhecimento"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A <strong>perda da proteostase<\/strong> \u00e9 um dos doze marcadores reconhecidos do envelhecimento biol\u00f3gico e o principal mecanismo pelo qual a rede de controle de qualidade celular da pele deixa de funcionar adequadamente com o passar do tempo. Quando os sistemas respons\u00e1veis pela s\u00edntese, dobramento e elimina\u00e7\u00e3o das prote\u00ednas perdem efici\u00eancia, as prote\u00ednas mal dobradas se acumulam, as reservas bioenerg\u00e9ticas entram em colapso e a arquitetura estrutural da derme entra em um estado de deteriora\u00e7\u00e3o progressiva e autoalimentada.\u00a0<\/p>\n\n\n\n\t\t<div class=\"ic_cta_wrapper\">\n\t\t\t<div class=\"ic_cta_banner\">\n\t\t\t\t<!--HubSpot Call-to-Action Code -->\n\t\t\t\t<span class=\"hs-cta-wrapper\" id='hs-cta-wrapper-6b077552-0592-4d14-aa33-a377b7bf6a9f'>\n\t\t\t\t\t<span class='hs-cta-node hs-cta-6b077552-0592-4d14-aa33-a377b7bf6a9f' id='hs-cta-6b077552-0592-4d14-aa33-a377b7bf6a9f'>\n\t\t\t\t\t\t<!--[if lte IE 8]><div id=\"hs-cta-ie-element\"><\/div><![endif]-->\n\t\t\t\t\t\t<a href=\"https:\/\/hubspot-cta-redirect-eu1-prod.s3.amazonaws.com\/cta\/redirect\/6867183\/6b077552-0592-4d14-aa33-a377b7bf6a9f\" target=\"_blank\" rel=\"noopener\">\n\t\t\t\t\t\t\t<img decoding=\"async\" class=\"hs-cta-img\" id=\"hs-cta-img-6b077552-0592-4d14-aa33-a377b7bf6a9f\" style=\"border-width:0px;\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/6867183\/6b077552-0592-4d14-aa33-a377b7bf6a9f.png\"  alt=\"New Call-to-action\" \/>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/span>\n\t\t\t    <script charset=\"utf-8\" src=\"https:\/\/js.hscta.net\/cta\/current.js\"><\/script>\n\t\t\t\t\t<script type=\"text\/javascript\">\n\t\t\t\t\t\thbspt.cta.load(6867183, '6b077552-0592-4d14-aa33-a377b7bf6a9f', {\"useNewLoader\":\"true\",\"region\":\"na1\"});\n\t\t\t\t\t<\/script>\n\t\t\t\t<\/span>\n\t\t\t\t<!-- end HubSpot Call-to-Action Code -->\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n  \n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_87 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Content<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#O_que_e_a_proteostase_Definindo_a_rede_de_controle_de_qualidade_celular\" >O que \u00e9 a proteostase? Definindo a rede de controle de qualidade celular&nbsp; &nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Proteostase_celular_na_pele_queratinocitos_e_fibroblastos_dermicos\" >Proteostase celular na pele: queratin\u00f3citos e fibroblastos d\u00e9rmicos&nbsp; &nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Perda_da_proteostase_um_marcador_fundamental_do_envelhecimento\" >Perda da proteostase: um marcador fundamental do envelhecimento&nbsp; &nbsp;<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Primeiro_pilar_dobramento_de_proteinas_e_causas_do_dobramento_incorreto_das_proteinas\" >Primeiro pilar: dobramento de prote\u00ednas e causas do dobramento incorreto das prote\u00ednas&nbsp; &nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Segundo_pilar_controle_de_qualidade_e_envelhecimento_por_perda_da_proteostase\" >Segundo pilar: controle de qualidade e envelhecimento por perda da proteostase&nbsp; &nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Terceiro_pilar_resposta_ao_estresse_e_o_que_significa_na_pratica_a_perda_da_proteostase\" >Terceiro pilar: resposta ao estresse e o que significa, na pr\u00e1tica, a perda da proteostase&nbsp; &nbsp;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Causas_e_biomarcadores_da_perda_da_proteostase_no_envelhecimento_da_pele\" >Causas e biomarcadores da perda da proteostase no envelhecimento da pele&nbsp; &nbsp;<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Doencas_causadas_por_proteinas_mal_dobradas_e_suas_consequencias_cutaneas\" >Doen\u00e7as causadas por prote\u00ednas mal dobradas e suas consequ\u00eancias cut\u00e2neas&nbsp; &nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Acumulo_celular_o_marcador_que_transforma_proteinas_danificadas_em_residuos\" >Ac\u00famulo celular: o marcador que transforma prote\u00ednas danificadas em res\u00edduos&nbsp; &nbsp;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Estilo_de_vida_e_longevidade_habitos_diarios_que_protegem_a_proteostase_celular\" >Estilo de vida e longevidade: h\u00e1bitos di\u00e1rios que protegem a proteostase celular&nbsp; &nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Provital_e_a_ciencia_da_proteostase_uma_abordagem_orientada_pela_pesquisa\" >Provital e a ci\u00eancia da proteostase: uma abordagem orientada pela pesquisa&nbsp; &nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Provital_%E2%80%93_mecanismo_de_acao_para_a_restauracao_da_proteostase\" >Provital \u2013 mecanismo de a\u00e7\u00e3o para a restaura\u00e7\u00e3o da proteostase&nbsp; &nbsp;<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Validacao_in_vitro_e_in_vivo_do_Energen%E2%84%A2\" >Valida\u00e7\u00e3o in vitro e in vivo do Energen\u2122&nbsp; &nbsp;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Perguntas_frequentes_sobre_proteostase_e_envelhecimento_celular\" >Perguntas frequentes sobre proteostase e envelhecimento celular&nbsp; &nbsp;<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#A_perda_da_proteostase_pode_ser_revertida_Evidencias_cientificas_atuais\" >A perda da proteostase pode ser revertida? Evid\u00eancias cient\u00edficas atuais&nbsp; &nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Qual_e_a_diferenca_entre_proteostase_e_senescencia_celular\" >Qual \u00e9 a diferen\u00e7a entre proteostase e senesc\u00eancia celular?&nbsp; &nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#O_que_causa_o_desdobramento_incorreto_das_proteinas_alem_do_envelhecimento\" >O que causa o desdobramento incorreto das prote\u00ednas, al\u00e9m do envelhecimento?&nbsp; &nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/blog.weareprovital.com\/pt-br\/perda-proteostase-envelhecimento\/#Em_que_idade_geralmente_comeca_o_declinio_da_proteostase_no_processo_de_envelhecimento\" >Em que idade geralmente come\u00e7a o decl\u00ednio da proteostase no processo de envelhecimento?&nbsp;<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"O_que_e_a_proteostase_Definindo_a_rede_de_controle_de_qualidade_celular\"><\/span><strong>O que \u00e9 a proteostase? Definindo a rede de controle de qualidade celular<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>proteostase<\/strong>, por defini\u00e7\u00e3o, ou seja, a homeostase proteica, \u00e9 a complexa rede celular de controle de qualidade respons\u00e1vel por manter a integridade funcional do proteoma. Ela regula a s\u00edntese cont\u00ednua, o dobramento conformacional preciso, o transporte e a degrada\u00e7\u00e3o seletiva das prote\u00ednas dentro da c\u00e9lula. Na biologia da pele, essa rede impede o ac\u00famulo de agregados proteicos t\u00f3xicos e garante a longevidade saud\u00e1vel das c\u00e9lulas.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O proteoma da pele est\u00e1 constantemente exposto a subprodutos metab\u00f3licos intr\u00ednsecos e a fatores de estresse ambientais extr\u00ednsecos. A proteostase atua como um tamp\u00e3o biol\u00f3gico, coordenando a maquinaria molecular para reparar elementos estruturais danificados e eliminar res\u00edduos metab\u00f3licos n\u00e3o funcionais. Durante o envelhecimento da pele, a efici\u00eancia desse sistema diminui, marcando uma transi\u00e7\u00e3o cr\u00edtica da regenera\u00e7\u00e3o de tecidos saud\u00e1veis para a deteriora\u00e7\u00e3o celular.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Proteostase_celular_na_pele_queratinocitos_e_fibroblastos_dermicos\"><\/span><strong>Proteostase celular na pele: queratin\u00f3citos e fibroblastos d\u00e9rmicos<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A<\/strong> <a href=\"https:\/\/blog.weareprovital.com\/pt-br\/ciencia-longevidade-pele-cuidado-metabolico-celular\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>longevidade do tecido cut\u00e2neo<\/strong><\/a> <strong>depende de mecanismos proteost\u00e1ticos especializados em compartimentos celulares distintos: os queratin\u00f3citos epid\u00e9rmicos e os fibroblastos d\u00e9rmicos.<\/strong> Os queratin\u00f3citos exigem um alto rendimento proteass\u00f4mico para sustentar a r\u00e1pida renova\u00e7\u00e3o celular e a cornifica\u00e7\u00e3o, enquanto os fibroblastos d\u00e9rmicos de vida longa dependem das vias lisossomais para manter a s\u00edntese da MEC.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Na epiderme, os <strong>queratin\u00f3citos<\/strong> produzem grandes quantidades de prote\u00ednas estruturais, como as citoqueratinas e a filagrina. O sistema ubiquitina-proteassoma (UPS) elimina prote\u00ednas intermedi\u00e1rias oxidativas para manter a diferencia\u00e7\u00e3o epid\u00e9rmica eficaz e a fun\u00e7\u00e3o de barreira.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por outro lado, os <strong>fibroblastos d\u00e9rmicos<\/strong> s\u00e3o c\u00e9lulas de divis\u00e3o lenta e longa vida, respons\u00e1veis pela produ\u00e7\u00e3o de prote\u00ednas estruturais, incluindo col\u00e1geno tipo I, col\u00e1geno tipo III e elastina. Como os fibroblastos precisam manter a integridade do proteoma ao longo de d\u00e9cadas, eles dependem fortemente da autofagia mediada por chaperonas e da macroautofagia. Uma diminui\u00e7\u00e3o da proteostase dos fibroblastos compromete a integridade da matriz extracelular, levando ao afinamento da derme, \u00e0 perda de elasticidade e \u00e0 redu\u00e7\u00e3o da firmeza estrutural.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Perda_da_proteostase_um_marcador_fundamental_do_envelhecimento\"><\/span><strong>Perda da proteostase: um marcador fundamental do envelhecimento<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A perda da proteostase \u00e9 um<\/strong> <a href=\"https:\/\/blog.weareprovital.com\/pt-br\/12-marcadores-envelhecimento-longevidade\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>marcador inicial do envelhecimento biol\u00f3gico<\/strong><\/a> <strong>que desestabiliza diretamente a<\/strong> <a href=\"https:\/\/blog.weareprovital.com\/pt-br\/ciencia-longevidade-pele-cuidado-metabolico-celular\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>arquitetura do tecido cut\u00e2neo<\/strong><\/a><strong>.<\/strong> Quando os sistemas de controle de qualidade das prote\u00ednas falham, as mol\u00e9culas danificadas se acumulam, causando estresse celular, esgotamento bioenerg\u00e9tico e caracter\u00edsticas secund\u00e1rias, tais como <a href=\"https:\/\/blog.weareprovital.com\/pt-br\/senescencia-celular-ciencia-e-tecnologia-se-unem-na-era-do-envelhecimento-saudavel\/\" target=\"_blank\" rel=\"noreferrer noopener\">senesc\u00eancia celular<\/a>.\u00a0<br>\u00a0<\/p>\n\n\n\n<p class=\"has-text-align-left wp-block-paragraph\">\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\u00a0<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ESTRESSE AMBIENTAL E METAB\u00d3LICO\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (Radia\u00e7\u00e3o UV, ROS, Polui\u00e7\u00e3o, Glica\u00e7\u00e3o)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2502\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u25bc\u00a0<br>\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 PERDA DE PROTEOSTASE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2022 Exaust\u00e3o de chaperona\u00a0\u00a0\u00a0 \u2022 Inibi\u00e7\u00e3o proteassomal\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2022 Autofagia prejudicada\u00a0\u00a0\u00a0 \u2022 Agrega\u00e7\u00e3o de prote\u00ednas mal dobradas\u00a0\u00a0 <br>\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2502\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u25bc\u00a0<br>\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\u00a0<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CONSEQU\u00caNCIAS CELULARES SECUND\u00c1RIAS\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2022 Decl\u00ednio bioenerg\u00e9tico (Exaust\u00e3o mitocondrial \/ Perda de ATP)\u00a0\u00a0 <br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2022 Indu\u00e7\u00e3o de senesc\u00eancia e secre\u00e7\u00e3o de SASP (IL-6, IL-8, MMPs)\u00a0\u00a0\u00a0 \u00a0<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2022 Colapso estrutural da matriz extracelular (MEC)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\u00a0<br><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A manuten\u00e7\u00e3o proteost\u00e1tica \u00e9 um processo que consome muita energia e exige um alto consumo de adenosina trifosfato (ATP) celular. \u00c0 medida que as c\u00e9lulas d\u00e9rmicas e epid\u00e9rmicas sofrem disfun\u00e7\u00e3o mitocondrial relacionada ao envelhecimento, o d\u00e9ficit de ATP resultante priva de energia os proteassomas e as redes de prote\u00ednas chaperonas, que dependem dessa energia.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Essa crise energ\u00e9tica desencadeia um ciclo que se autoalimenta de danos celulares: prote\u00ednas mal dobradas que n\u00e3o s\u00e3o eliminadas obstruem os s\u00edtios ativos do proteassoma, o que aumenta o estresse intracelular, causa danos adicionais \u00e0s mitoc\u00f4ndrias e acelera a degrada\u00e7\u00e3o da pele.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Primeiro_pilar_dobramento_de_proteinas_e_causas_do_dobramento_incorreto_das_proteinas\"><\/span><strong>Primeiro pilar: dobramento de prote\u00ednas e causas do dobramento incorreto das prote\u00ednas<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Os res\u00edduos de amino\u00e1cidos hidrof\u00f3bicos costumam ficar ocultos no n\u00facleo interno da prote\u00edna durante o processo de dobramento. As esp\u00e9cies reativas de oxig\u00eanio (ROS), a <a href=\"https:\/\/blog.weareprovital.com\/pt-br\/como-a-melanina-protege-a-pele-dos-raios-uv\/\" target=\"_blank\" rel=\"noreferrer noopener\">radia\u00e7\u00e3o ultravioleta (UV)<\/a> e o estresse t\u00e9rmico rompem essas intera\u00e7\u00f5es n\u00e3o covalentes fracas, expondo regi\u00f5es hidrof\u00f3bicas. Esses segmentos expostos se ligam de forma n\u00e3o espec\u00edfica a polipept\u00eddeos danificados vizinhos, formando estruturas insol\u00faveis com conforma\u00e7\u00e3o incorreta.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No processo de envelhecimento da pele, esse processo de agrega\u00e7\u00e3o \u00e9 acelerado de forma cr\u00f4nica pela diminui\u00e7\u00e3o das reservas de enzimas antioxidantes, criando um ac\u00famulo persistente de prote\u00ednas mal dobradas que excede a capacidade de elimina\u00e7\u00e3o tanto da via do UPS quanto da via lisoss\u00f4mica, e desencadeando diretamente o ciclo de <strong>perda da proteostase<\/strong>.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Segundo_pilar_controle_de_qualidade_e_envelhecimento_por_perda_da_proteostase\"><\/span><strong>Segundo pilar: controle de qualidade e envelhecimento por perda da proteostase<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Os dois principais sistemas de elimina\u00e7\u00e3o nas c\u00e9lulas da pele s\u00e3o o <strong>sistema ubiquitina-proteassoma (UPS)<\/strong> e o <strong>sistema lisossomal\/autof\u00e1gico<\/strong>. O UPS marca prote\u00ednas sol\u00faveis e de vida curta com mol\u00e9culas de ubiquitina para que sejam degradadas no complexo proteass\u00f4mico 20S\/26S.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Agregados maiores, got\u00edculas lip\u00eddicas e mitoc\u00f4ndrias danificadas (mitofagia) requerem degrada\u00e7\u00e3o lisoss\u00f4mica. O envelhecimento reduz a express\u00e3o de genes essenciais relacionados \u00e0 autofagia (incluindo <em>ATG5<\/em>, <em>ATG7<\/em> e <em>BECN1<\/em>) e degrada receptores da membrana lisossomal, como o LAMP2A, prejudicando a gest\u00e3o de res\u00edduos celulares.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Terceiro_pilar_resposta_ao_estresse_e_o_que_significa_na_pratica_a_perda_da_proteostase\"><\/span><strong>Terceiro pilar: resposta ao estresse e o que significa, na pr\u00e1tica, a perda da proteostase<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">As c\u00e9lulas utilizam <strong>chaperonas moleculares<\/strong> especializadas, principalmente prote\u00ednas de choque t\u00e9rmico (HSPs, como a HSP70 e a HSP90), para proteger regi\u00f5es hidrof\u00f3bicas expostas durante situa\u00e7\u00f5es de estresse ambiental. Na pr\u00e1tica, o envelhecimento das prote\u00ednas chaperonas leva \u00e0 agrega\u00e7\u00e3o proteica espont\u00e2nea.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quando as prote\u00ednas mal dobradas escapam tanto ao redobramento mediado pelas prote\u00ednas chaperonas quanto \u00e0 elimina\u00e7\u00e3o por autofagia, elas formam agregados reticulados de alto peso molecular que perturbam o transporte intracelular e induzem estresse celular.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Causas_e_biomarcadores_da_perda_da_proteostase_no_envelhecimento_da_pele\"><\/span><strong>Causas e biomarcadores da perda da proteostase no envelhecimento da pele<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Doencas_causadas_por_proteinas_mal_dobradas_e_suas_consequencias_cutaneas\"><\/span><strong>Doen\u00e7as causadas por prote\u00ednas mal dobradas e suas consequ\u00eancias cut\u00e2neas<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>As doen\u00e7as sist\u00eamicas causadas por prote\u00ednas mal dobradas oferecem<\/strong> <strong><em>insights<\/em><\/strong> <strong>fundamentais sobre os mecanismos do envelhecimento cut\u00e2neo.<\/strong> Na pele em processo de envelhecimento, agregados de prote\u00ednas n\u00e3o eliminados e <a href=\"https:\/\/blog.weareprovital.com\/pt-br\/ingredientes-de-regeneracao-da-pele\/\" target=\"_blank\" rel=\"noreferrer noopener\">produtos finais de glica\u00e7\u00e3o avan\u00e7ada (AGEs)<\/a> formam liga\u00e7\u00f5es cruzadas nas prote\u00ednas estruturais, reduzindo a complac\u00eancia biomec\u00e2nica e a <a href=\"https:\/\/blog.weareprovital.com\/pt-br\/elasticidade-da-pele\/\" target=\"_blank\" rel=\"noreferrer noopener\">elasticidade da pele<\/a>.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A glica\u00e7\u00e3o avan\u00e7ada ocorre quando os a\u00e7\u00facares redutores reagem de forma n\u00e3o enzim\u00e1tica com as fibras de col\u00e1geno e elastina de longa dura\u00e7\u00e3o. Esse processo forma liga\u00e7\u00f5es cruzadas intermoleculares que tornam a matriz extracelular mais r\u00edgida e alteram a sinaliza\u00e7\u00e3o c\u00e9lula-matriz por meio dos receptores de integrina.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Os fibroblastos cultivados em matrizes glicadas e endurecidas apresentam redu\u00e7\u00e3o na expans\u00e3o celular, diminui\u00e7\u00e3o da capacidade proliferativa e express\u00e3o elevada de <a href=\"https:\/\/blog.weareprovital.com\/pt-br\/fisiopatologia-da-celulite-sob-a-superficie-da-pele\/\" target=\"_blank\" rel=\"noreferrer noopener\">metaloproteinases da matriz (MMPs)<\/a>, transformando a estrutura local do tecido em um ambiente de matriz degradada.\u00a0<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Acumulo_celular_o_marcador_que_transforma_proteinas_danificadas_em_residuos\"><\/span><strong>Ac\u00famulo celular: o marcador que transforma prote\u00ednas danificadas em res\u00edduos<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A agrega\u00e7\u00e3o intracelular persistente de prote\u00ednas desencadeia a resposta a danos no DNA e induz a senesc\u00eancia celular.<\/strong> As c\u00e9lulas senescentes saem definitivamente do ciclo celular e secretam o <a href=\"https:\/\/blog.weareprovital.com\/pt-br\/ciencia-longevidade-pele-cuidado-metabolico-celular\/\" target=\"_blank\" rel=\"noreferrer noopener\">Fen\u00f3tipo Secretor Associado \u00e0 Senesc\u00eancia (SASP)<\/a>, disseminando inflama\u00e7\u00e3o localizada pelo tecido cut\u00e2neo saud\u00e1vel vizinho.\u00a0<br>\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\u00a0<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 PROTE\u00cdNA N\u00c3O ELIMINADA AGREGA\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2502\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u25bc\u00a0<br>\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\u00a0<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 RESPOSTA A DANOS PERSISTENTES AO DNA (DDR)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (Ativa\u00e7\u00e3o de p16INK4a &amp; p21CIP1)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2502\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u25bc\u00a0<br>\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\u00a0<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 PARADA DE C\u00c9LULAS SENESCENTES\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2502\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u25bc\u00a0<br>\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\u00a0<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 LIBERA\u00c7\u00c3O DO PERFIL DE SECRE\u00c7\u00c3O SASP\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2502\u00a0\u00a0\u00a0 \u2022 Citocinas pr\u00f3-inflamat\u00f3rias: IL-1\u03b2, IL-6, IL-8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2502\u00a0\u00a0\u00a0 \u2022 Metaloproteinases da matriz: MMP-1, MMP-3, MMP-9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2502\u00a0<br>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u25bc\u00a0<br>\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\u00a0<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 DEGRADA\u00c7\u00c3O PARACR\u00cdNA DA MEC\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0<br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2022 Clivagem das fibras de col\u00e1geno tipo I e elastina\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br>\u2502\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2022 Propaga\u00e7\u00e3o da senesc\u00eancia para fibroblastos saud\u00e1veis vizinhos\u00a0\u00a0\u00a0\u00a0 <br>\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\u00a0<br>\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00a0<br>O ac\u00famulo de agregados proteicos atua como um sinal de estresse persistente, regulando positivamente os inibidores do ciclo celular, incluindo o p16<sup>INK4a<\/sup> e o p21<sup>CIP1<\/sup>. Quando entram na fase de senesc\u00eancia, os fibroblastos deixam de ser produtores de col\u00e1geno estrutural e passam a ser secretores pr\u00f3-inflamat\u00f3rios.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O perfil de secre\u00e7\u00e3o do SASP inclui citocinas (IL-1\u03b2, IL-6, IL-8) e enzimas (MMP-1, MMP-3, MMP-9) que degradam as fibras intactas de col\u00e1geno e elastina da derme. Essa sinaliza\u00e7\u00e3o par\u00e1crina causa danos \u00e0s c\u00e9lulas saud\u00e1veis vizinhas, acelerando a degrada\u00e7\u00e3o do tecido d\u00e9rmico.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Estilo_de_vida_e_longevidade_habitos_diarios_que_protegem_a_proteostase_celular\"><\/span><strong>Estilo de vida e longevidade: h\u00e1bitos di\u00e1rios que protegem a proteostase celular<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>H\u00e1bitos de vida direcionados ajudam a proteger a proteostase da pele por meio da modula\u00e7\u00e3o das vias de detec\u00e7\u00e3o de nutrientes.<\/strong> A restri\u00e7\u00e3o cal\u00f3rica, o estresse t\u00e9rmico intermitente e o alinhamento circadiano regulam os principais reguladores metab\u00f3licos, incluindo o mTORC1 e a AMPK, para estimular a elimina\u00e7\u00e3o autof\u00e1gica interna.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/blog.weareprovital.com\/pt-br\/mimetismo-da-restricao-calorica-futuro-da-longevidade\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Mim\u00e9ticos da restri\u00e7\u00e3o cal\u00f3rica<\/strong><\/a>: A supress\u00e3o do sensor de nutrientes mTORC1, juntamente com a ativa\u00e7\u00e3o da prote\u00edna quinase ativada por AMP (AMPK), estimula a autofagia, eliminando os res\u00edduos intracelulares antes que se formem agregados.\u00a0<br>\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/blog.weareprovital.com\/pt-br\/como-redefinir-o-ritmo-circadiano-uma-revolucao-na-beleza-holistica\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Alinhamento circadiano<\/strong><\/a>: A elimina\u00e7\u00e3o autof\u00e1gica atinge seu pico durante o sono, orientada pelos genes do rel\u00f3gio biol\u00f3gico central (<em>CLOCK<\/em>, <em>BMAL1<\/em>). A perturba\u00e7\u00e3o dos ritmos circadianos reduz a degrada\u00e7\u00e3o proteoss\u00f4mica noturna, aumentando a suscetibilidade diurna ao estresse oxidativo induzido pelos raios UV.\u00a0<br>\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Estresse t\u00e9rmico (hormese)<\/strong>: A exposi\u00e7\u00e3o leve e transit\u00f3ria ao calor induz o Fator de Choque T\u00e9rmico 1 (HSF1), regulando positivamente as chaperonas moleculares protetoras, como a HSP70.\u00a0<br>\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Provital_e_a_ciencia_da_proteostase_uma_abordagem_orientada_pela_pesquisa\"><\/span><strong>Provital e a ci\u00eancia da proteostase: uma abordagem orientada pela pesquisa<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A Provital desenvolve<\/strong> <a href=\"https:\/\/www.weareprovital.com\/pt\/careactives\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>ingredientes ativos cosm\u00e9ticos<\/strong><\/a> <strong>por meio da<\/strong> <a href=\"https:\/\/www.weareprovital.com\/pt\/be-tech\/produtos-biotecnologicos\/tecnologia-triplobiometm\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>biotecnologia vegetal<\/strong><\/a> <strong>sustent\u00e1vel e da pesquisa em longevidade celular.<\/strong> Ao utilizar <a href=\"https:\/\/blog.weareprovital.com\/pt-br\/celulas-tronco-vegetais-no-cuidado-com-a-pele-dermohacking-de-ponta\/\" target=\"_blank\" rel=\"noreferrer noopener\">culturas de c\u00e9lulas-tronco<\/a>, subprodutos bot\u00e2nicos reciclados e biofermentos de alta precis\u00e3o, a Provital atua nos mecanismos centrais do envelhecimento celular.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A aplica\u00e7\u00e3o de <a href=\"https:\/\/www.weareprovital.com\/pt\/be-tech\/ensaios-de-cosmeticos-de-alta-tecnologia\/engenharia-de-tecidos\" target=\"_blank\" rel=\"noreferrer noopener\">modelos avan\u00e7ados de pele humana reconstru\u00eddos em 3D<\/a> e de <a href=\"https:\/\/www.weareprovital.com\/pt\/be-tech\/ensaios-de-cosmeticos-de-alta-tecnologia\/plataforma-de-bioimagem-e-bioinformatica-da-provital\" target=\"_blank\" rel=\"noreferrer noopener\">ferramentas anal\u00edticas de bioinform\u00e1tica<\/a> permite a avalia\u00e7\u00e3o precisa dos ingredientes ativos nas vias de degrada\u00e7\u00e3o celular e de elimina\u00e7\u00e3o. Essa abordagem baseada na ci\u00eancia oferece \u00e0s marcas de beleza ingredientes comprovados para a biolongevidade, que ajudam a restaurar a integridade do proteoma.\u00a0<br>\u00a0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Provital_%E2%80%93_mecanismo_de_acao_para_a_restauracao_da_proteostase\"><\/span><strong>Provital \u2013 mecanismo de a\u00e7\u00e3o para a restaura\u00e7\u00e3o da proteostase<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A degrada\u00e7\u00e3o pelo proteassoma e o redobramento assistido por prote\u00ednas chaperonas dependem diretamente da disponibilidade de ATP na c\u00e9lula.<\/strong> O <a href=\"https:\/\/www.weareprovital.com\/pt\/careactives\/energen\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Energen\u2122<\/strong><\/a> oferece uma estrat\u00e9gia direcionada para aumentar a capacidade bioenerg\u00e9tica, fornecendo a energia necess\u00e1ria para sustentar a proteostase ativa.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O Energen\u2122 combina saponos\u00eddeos do <em>Sapindus mukorossi<\/em> em uma matriz hidrocoloide derivada da goma de <em>Caesalpinia spinosa<\/em> (<a href=\"https:\/\/www.weareprovital.com\/pt\/be-tech\/produtos-biotecnologicos\/tecnologia-3d-matrix\" target=\"_blank\" rel=\"noreferrer noopener\">Tecnologia de Matriz 3D<\/a>). A matriz permanece na superf\u00edcie da pele, liberando sequencialmente saponos\u00eddeos de baixo peso molecular que penetram na derme.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ficou comprovado que o Energen\u2122 aumenta a quantidade de ATP celular quando aplicado em culturas de fibroblastos (+21,8%, <em>in vitro<\/em>), por meio da otimiza\u00e7\u00e3o do transporte de el\u00e9trons nas mitoc\u00f4ndrias. Ao reabastecer a reserva energ\u00e9tica da c\u00e9lula, o Energen\u2122 ajuda a manter as condi\u00e7\u00f5es bioenerg\u00e9ticas necess\u00e1rias para o funcionamento dos mecanismos de controle de qualidade que consomem muita energia, incluindo o proteassoma 26S e as chaperonas moleculares.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Validacao_in_vitro_e_in_vivo_do_Energen%E2%84%A2\"><\/span><strong>Valida\u00e7\u00e3o<\/strong> <em>in vitro<\/em> <strong>e<\/strong> <strong><em>in vivo<\/em><\/strong> <strong>do Energen\u2122<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V\u00e1rios estudos comprovam a efic\u00e1cia do<\/strong> <a href=\"https:\/\/www.weareprovital.com\/pt\/careactives\/energen\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Energen\u2122<\/strong><\/a> <strong>na restaura\u00e7\u00e3o da energia celular e na melhoria dos par\u00e2metros estruturais da pele.<\/strong> Medi\u00e7\u00f5es quantitativas demonstram um aumento na produ\u00e7\u00e3o de energia intracelular, juntamente com melhorias na firmeza da pele e na textura da superf\u00edcie.\u00a0<br>\u00a0<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Par\u00e2metro testado<\/strong>&nbsp;<\/td><td><strong>M\u00e9todo \/ Modelo<\/strong>&nbsp;<\/td><td><strong>Resultado de efic\u00e1cia medido<\/strong>&nbsp;<\/td><\/tr><tr><td><strong>Produ\u00e7\u00e3o celular de ATP<\/strong>&nbsp;<\/td><td>Ensaio <em>in vitro<\/em> com fibroblastos (Energen\u2122 1%)&nbsp;<\/td><td><strong>Aumento de 21,8%<\/strong> nos n\u00edveis intracelulares de ATP&nbsp;<\/td><\/tr><tr><td><strong>Tonifica\u00e7\u00e3o da pele<\/strong>&nbsp;<\/td><td>Avalia\u00e7\u00e3o do cut\u00f4metro <em>in vivo<\/em>&nbsp;<\/td><td><strong>Melhoria de 8,8%<\/strong> no tom da pele&nbsp;<\/td><\/tr><tr><td><strong>Imperfei\u00e7\u00f5es no relevo da superf\u00edcie<\/strong>&nbsp;<\/td><td>An\u00e1lise topogr\u00e1fica <em>in vivo<\/em>&nbsp;<\/td><td><strong>Redu\u00e7\u00e3o de 12%<\/strong> no <strong>al\u00edvio cut\u00e2neo global (RT)<\/strong>&nbsp;<\/td><\/tr><tr><td><strong>Hidrata\u00e7\u00e3o da pele<\/strong>&nbsp;<\/td><td>Avalia\u00e7\u00e3o da corneometria <em>in vivo<\/em>&nbsp;<\/td><td><strong>Aumento de 8,45% na hidrata\u00e7\u00e3o da pele<\/strong>&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">No estudo <em>in vivo<\/em> realizado pela Provital, o Energen\u2122 demonstrou melhorias evidentes na tonifica\u00e7\u00e3o e na suavidade da pele, confirmando que o apoio \u00e0 energia celular ajuda a manter a estrutura dos tecidos e a qualidade da superf\u00edcie.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Perguntas_frequentes_sobre_proteostase_e_envelhecimento_celular\"><\/span><strong>Perguntas frequentes sobre proteostase e envelhecimento celular<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"A_perda_da_proteostase_pode_ser_revertida_Evidencias_cientificas_atuais\"><\/span><strong>A perda da proteostase pode ser revertida? Evid\u00eancias cient\u00edficas atuais<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Embora n\u00e3o seja poss\u00edvel deter o envelhecimento cronol\u00f3gico, pesquisas cient\u00edficas mostram que mecanismos proteost\u00e1ticos latentes podem ser reativados. Produtos biotecnol\u00f3gicos t\u00f3picos que estimulam as vias de reciclagem autof\u00e1gica (por meio da inibi\u00e7\u00e3o do mTORC1 ou da ativa\u00e7\u00e3o da AMPK) e aumentam os n\u00edveis celulares de ATP podem restaurar a elimina\u00e7\u00e3o de res\u00edduos intracelulares, reduzir a agrega\u00e7\u00e3o de prote\u00ednas e melhorar a sa\u00fade da pele ao longo da vida.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Qual_e_a_diferenca_entre_proteostase_e_senescencia_celular\"><\/span><strong>Qual \u00e9 a diferen\u00e7a entre proteostase e senesc\u00eancia celular?<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A proteostase refere-se \u00e0 rede cont\u00ednua de controle de qualidade celular que regula o dobramento, a manuten\u00e7\u00e3o e a degrada\u00e7\u00e3o das prote\u00ednas. A senesc\u00eancia celular \u00e9 um estado de parada terminal do ciclo celular desencadeado quando prote\u00ednas e DNA danificados n\u00e3o podem ser eliminados, levando as c\u00e9lulas a secretar fatores pr\u00f3-inflamat\u00f3rios do SASP que degradam a matriz extracelular circundante.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"O_que_causa_o_desdobramento_incorreto_das_proteinas_alem_do_envelhecimento\"><\/span><strong>O que causa o desdobramento incorreto das prote\u00ednas, al\u00e9m do envelhecimento?<\/strong>&nbsp;<br><strong><\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O desdobramento incorreto das prote\u00ednas \u00e9 desencadeado por fatores extr\u00ednsecos e intr\u00ednsecos, incluindo a radia\u00e7\u00e3o ultravioleta da luz solar, esp\u00e9cies reativas de oxig\u00eanio (ROS), polui\u00e7\u00e3o por part\u00edculas urbanas, estresse t\u00e9rmico e produtos finais de glica\u00e7\u00e3o avan\u00e7ada (AGEs) derivados da alimenta\u00e7\u00e3o. Esses fatores de estresse alteram as liga\u00e7\u00f5es n\u00e3o covalentes entre os amino\u00e1cidos, expondo regi\u00f5es hidrof\u00f3bicas que formam agregados proteicos insol\u00faveis.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Em_que_idade_geralmente_comeca_o_declinio_da_proteostase_no_processo_de_envelhecimento\"><\/span><strong>Em que idade geralmente come\u00e7a o decl\u00ednio da proteostase no processo de envelhecimento?<\/strong>&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O decl\u00ednio proteost\u00e1tico subcl\u00ednico come\u00e7a no final dos 20 anos at\u00e9 o in\u00edcio dos 30, \u00e0 medida que a produ\u00e7\u00e3o basal de ATP mitocondrial diminui e os n\u00edveis de enzimas protetoras se reduzem. Sem uma interven\u00e7\u00e3o direcionada, esse decl\u00ednio se acelera aos 40 anos, levando a uma perda vis\u00edvel de firmeza, \u00e0 redu\u00e7\u00e3o da resili\u00eancia da barreira cut\u00e2nea e \u00e0 diminui\u00e7\u00e3o da elasticidade da pele.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para obter mais informa\u00e7\u00f5es ou <em>insights<\/em> sobre esse t\u00f3pico, n\u00e3o hesite em <a href=\"https:\/\/media.weareprovital.com\/pt-br\/entre-em-contato-com-nossa-equipe-de-especialistas\" target=\"_blank\" rel=\"noreferrer noopener\">contatar nossa equipe de especialistas<\/a>, que est\u00e1 dispon\u00edvel para fornecer orienta\u00e7\u00e3o e suporte na sele\u00e7\u00e3o das solu\u00e7\u00f5es mais adequadas \u00e0s suas necessidades.\u00a0<\/p>\n\n\n\n\t\t<div class=\"ic_cta_wrapper\">\n\t\t\t<div class=\"ic_cta_banner\">\n\t\t\t\t<!--HubSpot Call-to-Action Code -->\n\t\t\t\t<span class=\"hs-cta-wrapper\" id='hs-cta-wrapper-64ac2b24-4370-4c56-a20f-e631e888b75c'>\n\t\t\t\t\t<span class='hs-cta-node hs-cta-64ac2b24-4370-4c56-a20f-e631e888b75c' id='hs-cta-64ac2b24-4370-4c56-a20f-e631e888b75c'>\n\t\t\t\t\t\t<!--[if lte IE 8]><div id=\"hs-cta-ie-element\"><\/div><![endif]-->\n\t\t\t\t\t\t<a href=\"https:\/\/hubspot-cta-redirect-eu1-prod.s3.amazonaws.com\/cta\/redirect\/6867183\/64ac2b24-4370-4c56-a20f-e631e888b75c\" target=\"_blank\" rel=\"noopener\">\n\t\t\t\t\t\t\t<img decoding=\"async\" class=\"hs-cta-img\" id=\"hs-cta-img-64ac2b24-4370-4c56-a20f-e631e888b75c\" style=\"border-width:0px;\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/6867183\/64ac2b24-4370-4c56-a20f-e631e888b75c.png\"  alt=\"New Call-to-action\" \/>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/span>\n\t\t\t    <script charset=\"utf-8\" src=\"https:\/\/js.hscta.net\/cta\/current.js\"><\/script>\n\t\t\t\t\t<script type=\"text\/javascript\">\n\t\t\t\t\t\thbspt.cta.load(6867183, '64ac2b24-4370-4c56-a20f-e631e888b75c', {\"useNewLoader\":\"true\",\"region\":\"na1\"});\n\t\t\t\t\t<\/script>\n\t\t\t\t<\/span>\n\t\t\t\t<!-- end HubSpot Call-to-Action Code -->\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n  \n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A perda da proteostase \u00e9 um dos doze marcadores reconhecidos do envelhecimento biol\u00f3gico e o principal mecanismo pelo qual a [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":17185,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"footnotes":""},"categories":[55],"tags":[],"class_list":["post-17203","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-inovacao-em-compartilhamento"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>O que \u00e9 a perda de proteostase? 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