{"id":637212,"date":"2025-09-04T15:03:55","date_gmt":"2025-09-04T13:03:55","guid":{"rendered":"https:\/\/spln.eu\/?p=637212"},"modified":"2025-09-04T15:03:56","modified_gmt":"2025-09-04T13:03:56","slug":"az-embriok-preimplantacios-genetikai-vizsgalatanak-pgt-okai-es-fontossaga","status":"publish","type":"post","link":"https:\/\/spln.eu\/hu\/az-embriok-preimplantacios-genetikai-vizsgalatanak-pgt-okai-es-fontossaga\/","title":{"rendered":"Az embri\u00f3k preimplant\u00e1ci\u00f3s genetikai vizsg\u00e1lat\u00e1nak (PGT) okai \u00e9s fontoss\u00e1ga"},"content":{"rendered":"\n

A PGT (\u201ePreimplantation Genetic Testing\u201d) az embri\u00f3k genetikai vizsg\u00e1lat\u00e1t jelenti, miel\u0151tt azokat a p\u00e1ciens m\u00e9h\u00e9be be\u00fcltetik, azaz az implant\u00e1ci\u00f3 el\u0151tt. Ezeket a vizsg\u00e1latokat genetikai tan\u00e1csad\u00e1s alapj\u00e1n aj\u00e1nlj\u00e1k olyan esetekben, amikor magasabb a genetikai rendelleness\u00e9gek kock\u00e1zata. Ezeknek a m\u00f3dszereknek az alkalmaz\u00e1sa eset\u00e9n nem friss, hanem fagyasztott embri\u00f3k be\u00fcltet\u00e9s\u00e9re ker\u00fcl sor, miut\u00e1n a vizsg\u00e1lat eredm\u00e9nyei ismertt\u00e9 v\u00e1lnak. A PGT nem alkalmazhat\u00f3 a nem kiv\u00e1laszt\u00e1s\u00e1ra, kiv\u00e9ve azokat az eseteket, amelyeket a genetikus s\u00falyos, nemhez k\u00f6t\u0151d\u0151 \u00e9s genetikailag \u00f6r\u00f6kl\u0151d\u0151 betegs\u00e9gek eset\u00e9n indokoltnak tart. Ha ilyen betegs\u00e9g nem fordul el\u0151 a csal\u00e1dban, a nemi vizsg\u00e1latr\u00f3l sz\u00f3l\u00f3 inform\u00e1ci\u00f3 nem szerepel a betegeknek sz\u00f3l\u00f3 jelent\u00e9sben.<\/p>\n\n\n\n\n\n\n\n

PGT monog\u00e9n betegs\u00e9gek eset\u00e9n \u2013 PGT-M<\/strong> (\u201ePGT for monogenic\/ single gene defects\u201d)<\/h2>\n\n\n\n

A PGT-M olyan m\u00f3dszer, amelyet m\u00e1r a p\u00e1r csal\u00e1dj\u00e1ban meg\u00e1llap\u00edtott \u00f6r\u00f6kletes betegs\u00e9g eset\u00e9n alkalmaznak. Lehet\u0151v\u00e9 teszi a be\u00fcltet\u00e9s el\u0151tti mut\u00e1ci\u00f3k (v\u00e1ltoz\u00e1sok) kimutat\u00e1s\u00e1t az egyes g\u00e9nekben, amelyek egy konkr\u00e9t \u00f6r\u00f6kletes betegs\u00e9ggel kapcsolatosak, amelynek egyik vagy mindk\u00e9t partner hordoz\u00f3ja, \u00e9s amely m\u00e1r el\u0151fordulhatott a csal\u00e1dban (p\u00e9ld\u00e1ul ciszt\u00e1s fibr\u00f3zis).<\/p>\n\n\n\n

PGT struktur\u00e1lis kromosz\u00f3ma-rendelleness\u00e9gek eset\u00e9n \u2013 PGT-SR<\/strong> (\u201ePGT for chromosomal structural rearrangements\u201d)<\/h2>\n\n\n\n

Kromosz\u00f3m\u00e1lis rendelleness\u00e9gek hordoz\u00e1sa eset\u00e9n a PGT-SR arra szolg\u00e1l, hogy felismerje azokat az embri\u00f3kat, amelyekn\u00e9l kromosz\u00f3m\u00e1k szerkezet\u00e9nek egy r\u00e9sze hi\u00e1nyzik vagy t\u00f6bbletben van.<\/p>\n\n\n\n

PGT aneuploidi\u00e1k \u2013 PGT-A<\/strong> (\u201ePGT for chromosomal aneuploidies\u201d)<\/h2>\n\n\n\n

A PGT-A egy olyan m\u00f3dszer, amely lehet\u0151v\u00e9 teszi a kromosz\u00f3m\u00e1k (ezek k\u00f6r\u00fclbel\u00fcl sz\u00e1z g\u00e9nt tartalmaz\u00f3 blokkok) sz\u00e1m\u00e1ban vagy m\u00e9ret\u00e9ben bek\u00f6vetkezett elt\u00e9r\u00e9sek felismer\u00e9s\u00e9t, amelyek megakad\u00e1lyozz\u00e1k az embri\u00f3 szerveinek megfelel\u0151 fejl\u0151d\u00e9s\u00e9t, \u00e9s gyakran spont\u00e1n vet\u00e9l\u00e9ssel j\u00e1rnak (p\u00e9ld\u00e1ul Down-szindr\u00f3ma). PGT-A n\u00e9lk\u00fcl nem szerezn\u00e9nk meg ezt az inform\u00e1ci\u00f3t, \u00e9s olyan embri\u00f3k be\u00fcltet\u00e9s\u00e9re is sor ker\u00fclhetne, amelyek nem k\u00e9pesek rendes terhess\u00e9ghez vezetni. \u00cdgy kiz\u00e1rhat\u00f3k a leggyakoribb kromosz\u00f3ma-elt\u00e9r\u00e9sek, \u00e9s cs\u00f6kkenthet\u0151 a vet\u00e9l\u00e9s vagy a s\u00falyos kromosz\u00f3ma-rendelleness\u00e9ggel sz\u00fcletett gyermek kock\u00e1zata. Ugyanakkor n\u00f6vekszik a mesters\u00e9ges megterm\u00e9keny\u00edt\u00e9s sikeress\u00e9ge, mivel csak a negat\u00edv vizsg\u00e1lati eredm\u00e9nnyel rendelkez\u0151 embri\u00f3k ker\u00fclnek \u00e1t a m\u00e9hbe.<\/p>\n\n\n\n

Mi az aneuploidia?<\/h3>\n\n\n\n

Az emberi sejtek 46 kromosz\u00f3m\u00e1t (23 p\u00e1r) tartalmaznak. Aneuploidia akkor fordul el\u0151, ha az embri\u00f3 t\u00f6bb vagy kevesebb kromosz\u00f3m\u00e1val rendelkezik, p\u00e9ld\u00e1ul 45 vagy 47. P\u00e9ld\u00e1ul a Down-szindr\u00f3ma egy gyakori aneuploidia, amelyben a 21. kromosz\u00f3m\u00e1b\u00f3l h\u00e1rom p\u00e9ld\u00e1ny l\u00e9tezik.<\/p>\n\n\n\n

Hogyan m\u0171k\u00f6dik a PGT-A folyamat?<\/h3>\n\n\n\n

Az embri\u00f3kat 5 napig teny\u00e9sztik (a blasztociszta st\u00e1diumig). Ekkor az embri\u00f3 k\u00fcls\u0151 r\u00e9sz\u00e9b\u0151l (trofektoderm) n\u00e9h\u00e1ny sejtb\u0151l \u00e1ll\u00f3 mint\u00e1t vesznek. A mint\u00e1t genetikai laborat\u00f3riumba k\u00fcldik vizsg\u00e1latra, az embri\u00f3kat pedig lefagyasztj\u00e1k.<\/p>\n\n\n\n

A kromosz\u00f3m\u00e1k sz\u00e1ma alapj\u00e1n az embri\u00f3k h\u00e1rom csoportba sorolhat\u00f3k:<\/p>\n\n\n\n

    \n
  • Euploid (norm\u00e1lis kromosz\u00f3masz\u00e1m)<\/li>\n\n\n\n
  • Aneuploid (abnorm\u00e1lis kromosz\u00f3masz\u00e1m)<\/li>\n\n\n\n
  • Mozaik (vegyes: egyes sejtek norm\u00e1lisak, m\u00e1sok nem)<\/li>\n<\/ul>\n\n\n\n

    A PGT-A f\u0151k\u00e9nt az al\u00e1bbi esetekben aj\u00e1nlott:<\/strong><\/p>\n\n\n\n

      \n
    • Id\u0151sebb n\u0151k eset\u00e9ben<\/li>\n\n\n\n
    • T\u00f6bb vet\u00e9l\u00e9s ut\u00e1n<\/li>\n\n\n\n
    • T\u00f6bb sikertelen IVF-k\u00eds\u00e9rlet ut\u00e1n<\/li>\n\n\n\n
    • Ismeretlen medd\u0151s\u00e9g eset\u00e9n<\/li>\n<\/ul>\n\n\n\n

      El\u0151nyei:<\/strong><\/p>\n\n\n\n

        \n
      • Nagyobb es\u00e9ly a eg\u00e9szs\u00e9ges embri\u00f3 be\u00e1gyaz\u00f3d\u00e1s\u00e1ra<\/li>\n\n\n\n
      • Cs\u00f6kkentheti a vet\u00e9l\u00e9s kock\u00e1zat\u00e1t<\/li>\n\n\n\n
      • R\u00f6videbb id\u0151 a sikeres terhess\u00e9gig<\/li>\n<\/ul>\n\n\n\n

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

        A PGT (\u201ePreimplantation Genetic Testing\u201d) az embri\u00f3k genetikai vizsg\u00e1lat\u00e1t jelenti, miel\u0151tt azokat a p\u00e1ciens m\u00e9h\u00e9be be\u00fcltetik, azaz az implant\u00e1ci\u00f3 el\u0151tt. Ezeket a vizsg\u00e1latokat genetikai tan\u00e1csad\u00e1s alapj\u00e1n aj\u00e1nlj\u00e1k olyan esetekben, amikor magasabb a genetikai rendelleness\u00e9gek kock\u00e1zata. Ezeknek a m\u00f3dszereknek az alkalmaz\u00e1sa eset\u00e9n nem friss, hanem fagyasztott embri\u00f3k be\u00fcltet\u00e9s\u00e9re ker\u00fcl sor, miut\u00e1n a vizsg\u00e1lat eredm\u00e9nyei ismertt\u00e9 v\u00e1lnak….<\/p>\n","protected":false},"author":4,"featured_media":637213,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[519],"tags":[],"class_list":["post-637212","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-gyermekhez-vezeto-ut"],"yoast_head":"\nAz embri\u00f3k preimplant\u00e1ci\u00f3s genetikai vizsg\u00e1lat\u00e1nak (PGT) okai \u00e9s fontoss\u00e1ga - SPLN<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/spln.eu\/hu\/az-embriok-preimplantacios-genetikai-vizsgalatanak-pgt-okai-es-fontossaga\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Az embri\u00f3k preimplant\u00e1ci\u00f3s genetikai vizsg\u00e1lat\u00e1nak (PGT) okai \u00e9s fontoss\u00e1ga - SPLN\" \/>\n<meta property=\"og:description\" content=\"A PGT (\u201ePreimplantation Genetic Testing\u201d) az embri\u00f3k genetikai vizsg\u00e1lat\u00e1t jelenti, miel\u0151tt azokat a p\u00e1ciens m\u00e9h\u00e9be be\u00fcltetik, azaz az implant\u00e1ci\u00f3 el\u0151tt. 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