{"id":2980,"date":"2018-08-16T01:08:27","date_gmt":"2018-08-15T22:08:27","guid":{"rendered":"https:\/\/mereusanatosi.ro\/wp\/?p=2980"},"modified":"2018-08-16T01:08:27","modified_gmt":"2018-08-15T22:08:27","slug":"cercetatorii-au-inventat-primul-model-de-placenta-artificiala","status":"publish","type":"post","link":"https:\/\/mereusanatosi.ro\/wp\/2018\/08\/16\/cercetatorii-au-inventat-primul-model-de-placenta-artificiala\/","title":{"rendered":"Cercet\u0103torii au inventat primul model de placent\u0103 artificial\u0103"},"content":{"rendered":"<figure id=\"attachment_2981\" aria-describedby=\"caption-attachment-2981\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" class=\"wp-image-2981 size-large\" src=\"https:\/\/mereusanatosi.ro\/wp\/wp-content\/uploads\/2018\/08\/placent\u0103-artificial\u0103-800x445-800x445.jpg\" alt=\"Surs\u0103 foto: https:\/\/blog.pregistry.com\" width=\"800\" height=\"445\" srcset=\"https:\/\/mereusanatosi.ro\/wp\/wp-content\/uploads\/2018\/08\/placent\u0103-artificial\u0103-800x445-800x445.jpg 800w, https:\/\/mereusanatosi.ro\/wp\/wp-content\/uploads\/2018\/08\/placent\u0103-artificial\u0103-800x445-300x167.jpg 300w, https:\/\/mereusanatosi.ro\/wp\/wp-content\/uploads\/2018\/08\/placent\u0103-artificial\u0103-800x445-768x427.jpg 768w, https:\/\/mereusanatosi.ro\/wp\/wp-content\/uploads\/2018\/08\/placent\u0103-artificial\u0103-800x445.jpg 1067w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-2981\" class=\"wp-caption-text\">Surs\u0103 foto: https:\/\/blog.pregistry.com<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<p>\u00cen timpul unei sarcini, placenta are un rol esen\u021bial \u0219i foarte complex: trebuie s\u0103 asigure schimbul de substan\u021be importante \u00eentre mam\u0103 \u0219i copilul ei nen\u0103scut, bloc\u00e2nd \u00een acela\u0219i timp trecerea altor substan\u021be. P\u00e2n\u0103 \u00een prezent, nu a fost pe deplin \u00een\u021beles motivul de care depinde permeabilitatea placentei, fiind dificil s\u0103 se poate investiga func\u021bia acesteia. Din acest motiv, cercet\u0103torii din Viena au produs un model artificial de placent\u0103, care seam\u0103n\u0103 foarte mult cu organul natural. Folosind un procedeu special de imprimare pe baz\u0103 de laser, este posibil s\u0103 se produc\u0103 membrane hidrogelizate personalizate direct \u00een chips-uri microfluidice, care sunt apoi populate cu celule de placent\u0103.<\/p>\n<p>&#8220;Transportul substan\u021belor prin membranele biologice joac\u0103 un rol important \u00een diferite domenii ale medicinei&#8221;, spune dr. Aleksandr Ovsianikov de la Institutul de \u0218tiin\u021b\u0103 \u0219i Tehnologie a Materialelor de la TU Wien. Acestea includ bariera hemato-encefalic\u0103, ingestia de alimente \u00een stomac \u0219i intestin, dar \u0219i \u00een placent\u0103. Exist\u0103, de exemplu, numeroase studii care arat\u0103 c\u0103 bolile la mam\u0103, cum ar fi diabetul zaharat, pot avea un impact asupra copilului nen\u0103scut. Tensiunea arterial\u0103 crescut\u0103 poate afecta, de asemenea, transportul de substan\u021be c\u0103tre f\u0103t. P\u00e2n\u0103 \u00een prezent, a fost aproape imposibil s\u0103 se investigheze modul \u00een care mul\u021bi parametri implica\u021bi interac\u021bioneaz\u0103 \u00een astfel de cazuri.<\/p>\n<p>Cercet\u0103torii au folosit un proces special de imprimare 3D pentru a produce o parti\u021bie \u00eentre membrana artificial\u0103 a placentei. Acest lucru permite ca structurile 3D s\u0103 fie create punctual cu o rezolu\u021bie \u00een domeniul micrometric. Pe baza modelului placentei naturale, se poate produce o suprafa\u021b\u0103 cu vilozit\u0103\u021bi mici, curbate. Celulele placentare pot apoi s\u0103 o colonizeze, cre\u00e2nd o barier\u0103 foarte asem\u0103n\u0103toare cu placenta natural\u0103.<\/p>\n<p>Pe cip, parametrii biologici importan\u021bi pot fi monitoriza\u021bi \u00eendeaproape, cum ar fi presiunea, temperatura, geometria \u0219i aportul de nutrien\u021bi ai mini organelor, precum \u0219i administrarea de medicamente. Acest lucru face posibil\u0103 observarea cu precizie a progresului bolii \u0219i a ratelor de vindecare. Testele ini\u021biale au ar\u0103tat c\u0103 placenta artificial\u0103 a chipului se comport\u0103 \u00eentr-un mod similar cu o placent\u0103 natural\u0103: molecule mici pot trece, iar cele mari sunt re\u021binute. Modelul este destinat s\u0103 fie utilizat \u00een mod special pentru a investiga aspecte importante ale transportului de nutrien\u021bi de la mam\u0103 la f\u0103t.<\/p>\n<p>&nbsp;<\/p>\n<p>Surs\u0103: https:\/\/www.sciencedaily.com\/releases\/2018\/08\/180814101431.htm<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; \u00cen timpul unei sarcini, placenta are un rol esen\u021bial \u0219i foarte complex: trebuie s\u0103 asigure schimbul de substan\u021be importante<\/p>\n","protected":false},"author":1,"featured_media":2981,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[837,64,61,11,166],"tags":[884,883,882,881],"_links":{"self":[{"href":"https:\/\/mereusanatosi.ro\/wp\/wp-json\/wp\/v2\/posts\/2980"}],"collection":[{"href":"https:\/\/mereusanatosi.ro\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mereusanatosi.ro\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mereusanatosi.ro\/wp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mereusanatosi.ro\/wp\/wp-json\/wp\/v2\/comments?post=2980"}],"version-history":[{"count":1,"href":"https:\/\/mereusanatosi.ro\/wp\/wp-json\/wp\/v2\/posts\/2980\/revisions"}],"predecessor-version":[{"id":2982,"href":"https:\/\/mereusanatosi.ro\/wp\/wp-json\/wp\/v2\/posts\/2980\/revisions\/2982"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mereusanatosi.ro\/wp\/wp-json\/wp\/v2\/media\/2981"}],"wp:attachment":[{"href":"https:\/\/mereusanatosi.ro\/wp\/wp-json\/wp\/v2\/media?parent=2980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mereusanatosi.ro\/wp\/wp-json\/wp\/v2\/categories?post=2980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mereusanatosi.ro\/wp\/wp-json\/wp\/v2\/tags?post=2980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}