Son y\u0131llar\u0131n en \u00f6nemli kanser ara\u015ft\u0131rmalar\u0131ndan biri, ya\u015flanmayla birlikte ortaya \u00e7\u0131kan kan h\u00fccresi mutasyonlar\u0131n\u0131n solid t\u00fcm\u00f6rleri do\u011frudan etkiledi\u011fini ve hastalar\u0131n sa\u011fkal\u0131m\u0131n\u0131 olumsuz y\u00f6nde etkiledi\u011fini ortaya koydu. Francis Crick Enstit\u00fcs\u00fc, University College London (UCL), Gustave Roussy ve Memorial Sloan Kettering Kanser Merkezi (MSK) gibi d\u00fcnyaca tan\u0131nm\u0131\u015f enstit\u00fclerden ara\u015ft\u0131rmac\u0131lar\u0131n ortak \u00e7al\u0131\u015fmas\u0131yla y\u00fcr\u00fct\u00fclen bu kapsaml\u0131 \u00e7al\u0131\u015fma, ya\u015fa ba\u011fl\u0131 kan h\u00fccresi mutasyonlar\u0131n\u0131n kanserin ilerleyi\u015finde \u00fcstlendi\u011fi kritik rollerin anla\u015f\u0131lmas\u0131n\u0131 sa\u011flad\u0131. \u00d6zellikle kanserde ya\u015f\u0131n ve kan h\u00fccresi genetik de\u011fi\u015fimlerinin rol\u00fc, kanser tedavisinde yeni ufuklar a\u00e7abilecek ke\u015fiflerle yeniden \u015fekilleniyor.<\/p>\n
\u00c7al\u0131\u015fman\u0131n oda\u011f\u0131nda \u201cbelirsiz potansiyele sahip klonal hematopoez\u201d (CHIP) olarak adland\u0131r\u0131lan bir fenomen yer al\u0131yor. CHIP, kemik ili\u011findeki hematopoetik k\u00f6k h\u00fccrelerin ya\u015fam boyunca edindi\u011fi somatik mutasyonlar\u0131n geni\u015flemesiyle ortaya \u00e7\u0131k\u0131yor. \u00d6nceden kardiyovask\u00fcler hastal\u0131klar ve hematolojik kanserlerle ili\u015fkilendirilmi\u015f olan CHIP\u2019in, solid organ kanserlerinde ne \u015fekilde rol oynad\u0131\u011f\u0131 ise pek bilinmiyordu. Ancak yeni ara\u015ft\u0131rma, kanser hastalar\u0131n\u0131n dola\u015f\u0131mdaki kan h\u00fccrelerinde CHIP mutasyonlar\u0131na rastland\u0131\u011f\u0131n\u0131 ve bu mutasyonlar\u0131n \u00f6nemli bir k\u0131sm\u0131n\u0131n t\u00fcm\u00f6r i\u00e7ine s\u0131zan ba\u011f\u0131\u015f\u0131kl\u0131k h\u00fccrelerinde bulundu\u011funu ortaya koydu.<\/p>\n
\u00c7al\u0131\u015fma, \u0130ngiltere\u2019de Cancer Research UK taraf\u0131ndan desteklenen TRACERx ve PEACE klinik ara\u015ft\u0131rmalar\u0131na kat\u0131lan 400\u2019den fazla akci\u011fer kanseri hastas\u0131na, ayr\u0131ca MSK hastanesinde farkl\u0131 kanser tiplerine sahip 49.000\u2019e yak\u0131n hastaya ait kan \u00f6rneklerinin derin dizilimleriyle ilerledi. Genetik veriler, hasta takibi ve klinik sonu\u00e7larla kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda CHIP mutasyonlar\u0131n\u0131n varl\u0131\u011f\u0131n\u0131n, hastalar\u0131n ya\u015flar\u0131 ya da t\u00fcm\u00f6r evresi ne olursa olsun genel sa\u011fkal\u0131m\u0131 belirgin \u015fekilde d\u00fc\u015f\u00fcrd\u00fc\u011f\u00fc g\u00f6r\u00fcld\u00fc. Bu, ya\u015fa ba\u011fl\u0131 kan h\u00fccresi mutasyonlar\u0131n\u0131n kanser prognozuna etkisi konusunda \u00f6nceden fark edilmeyen bir boyutu g\u00f6sterdi.<\/p>\n
Ara\u015ft\u0131rman\u0131n \u00f6nemli bir b\u00f6l\u00fcm\u00fc, CHIP mutasyonlar\u0131n\u0131n sadece kan dola\u015f\u0131m\u0131nda kalmay\u0131p do\u011frudan t\u00fcm\u00f6r mikro\u00e7evresine de n\u00fcfuz edebildi\u011fini yani \u201ct\u00fcm\u00f6r infiltrasyonlu klonal hematopoez\u201d (TI-CH) ad\u0131 verilen durumu tan\u0131mlamaya odakland\u0131. CHIP\u2019e sahip hastalar\u0131n yakla\u015f\u0131k %42\u2019sinde TI-CH g\u00f6zlendi. Bu durum; hematopoietik sistem ile t\u00fcm\u00f6r biyolojisi aras\u0131nda anlaml\u0131 ve g\u00fc\u00e7l\u00fc bir etkile\u015fimin g\u00f6stergesi olarak de\u011ferlendirildi. Dahas\u0131, TI-CH varl\u0131\u011f\u0131, CHIP\u2019in tek ba\u015f\u0131na g\u00f6sterdi\u011fi etkiden \u00e7ok daha g\u00fc\u00e7l\u00fc bir \u015fekilde hastal\u0131k n\u00fcks\u00fc ve \u00f6l\u00fcm\u00fc \u00f6ng\u00f6rebiliyordu.<\/p>\n
PEACE ara\u015ft\u0131rmas\u0131n\u0131n otopsi verileri incelendi\u011finde, TI-CH\u2019nin sadece primer t\u00fcm\u00f6rler de\u011fil, metastatik yani kanserin yay\u0131lmaya ba\u015flad\u0131\u011f\u0131 uzak organlardaki lezyonlarda da yayg\u0131n oldu\u011fu do\u011fruland\u0131. Bu bulgu, TI-CH mutasyonlar\u0131n\u0131 ta\u015f\u0131yan miyeloid h\u00fccrelerin kanserin ileri evrelerinde aktif rol oynad\u0131\u011f\u0131n\u0131, hastal\u0131\u011f\u0131n agresif bi\u00e7imde ilerlemesini ve metastaz\u0131n yerle\u015fmesini kolayla\u015ft\u0131rd\u0131\u011f\u0131n\u0131 d\u00fc\u015f\u00fcnd\u00fcrd\u00fc. B\u00f6ylece TI-CH, kanserin terminal d\u00f6nemlerinde bile \u00f6nemli bir biyolojik s\u00fcre\u00e7 olarak ortaya \u00e7\u0131kt\u0131.<\/p>\n
\u00c7al\u0131\u015fmada ayr\u0131ca t\u00fcm\u00f6r mikro\u00e7evresine s\u0131zan mutant h\u00fccrelerin hangi ba\u011f\u0131\u015f\u0131kl\u0131k sistemi subtipleri oldu\u011fu molek\u00fcler ve h\u00fccresel d\u00fczeyde ayr\u0131nt\u0131l\u0131 \u015fekilde karakterize edildi. CHIP mutasyonlar\u0131 en \u00e7ok miyeloid h\u00fccreler i\u00e7inde bulundu. Miyeloid h\u00fccreler; inflamasyon, doku onar\u0131m\u0131 ve ba\u011f\u0131\u015f\u0131kl\u0131k bask\u0131lay\u0131c\u0131 roller \u00fcstlenerek t\u00fcm\u00f6r\u00fcn ba\u011f\u0131\u015f\u0131kl\u0131k sisteminden ka\u00e7mas\u0131na zemin haz\u0131rlayabiliyor. Bu durum, kanser h\u00fccrelerinin ba\u011f\u0131\u015f\u0131kl\u0131k sisteminden saklanmas\u0131na ve daha h\u0131zl\u0131 yayg\u0131nla\u015fmas\u0131na uygun ortam sa\u011fl\u0131yor.<\/p>\n
TI-CH\u2019de saptanan genler aras\u0131nda TET2 \u00f6ne \u00e7\u0131kt\u0131. TET2, hematopoez ve epigenetik d\u00fczenlemede kritik fonksiyonlar \u00fcstlenen bir gen olup mutant versiyonlar\u0131 t\u00fcm\u00f6r infiltrasyonunda bask\u0131nd\u0131. Y\u00fczlerce tek h\u00fccre analizi ile TET2 mutasyonlar\u0131n\u0131n \u00f6zellikle miyeloid h\u00fccrelerde yo\u011funla\u015ft\u0131\u011f\u0131 belirlendi. Bu da TET2 mutantlar\u0131n\u0131n t\u00fcm\u00f6r mikro\u00e7evresine \u00f6zel bir tropizme veya se\u00e7ilim avantaj\u0131na sahip olduklar\u0131n\u0131 g\u00f6sterdi.<\/p>\n
Ara\u015ft\u0131rma grubu, Crick Enstit\u00fcs\u00fc\u2019ndeki Dominique Bonnet liderli\u011findeki kanser ve CHIP uzmanlar\u0131yla i\u015f birli\u011fi yaparak, TET2 mutant miyeloid h\u00fccrelerle ko-k\u00fclt\u00fcr edilen \u00fc\u00e7 boyutlu akci\u011fer t\u00fcm\u00f6r\u00fc organoid modelleri geli\u015ftirdi. Bu modellerde mutant miyeloid h\u00fccrelerin, t\u00fcm\u00f6r mikro\u00e7evresinde ciddi yap\u0131sal de\u011fi\u015fiklikler yaratt\u0131\u011f\u0131 ve organoidlerin b\u00fcy\u00fcmesini h\u0131zland\u0131rd\u0131\u011f\u0131 g\u00f6zlemlendi. Bu deneysel kan\u0131tlar, mutant miyeloid h\u00fccrelerin pasif de\u011fil, aktif \u015fekilde t\u00fcm\u00f6r progresyonunu destekledi\u011fini ortaya koydu.<\/p>\n
Bulgular sadece akci\u011fer kanseriyle s\u0131n\u0131rl\u0131 kalmad\u0131. Ara\u015ft\u0131rma, pankreas kanseri ve ba\u015f-boyun skuamoz h\u00fccreli karsinom gibi tedaviye diren\u00e7li t\u00fcm\u00f6r tiplerinde de TI-CH prevalans\u0131n\u0131n artt\u0131\u011f\u0131n\u0131 g\u00f6sterdi. Bu da ya\u015fa ba\u011fl\u0131 klonal hematopoezin, solid t\u00fcm\u00f6rlerin tedaviye yan\u0131t\u0131n\u0131 olumsuz etkileyen immunolojik de\u011fi\u015fimlerin alt\u0131nda yatan nedenlerden biri olabilece\u011fini i\u015faret etti.<\/p>\n
Ya\u015flanma, klonal hematopoez ve kanser biyolojisi aras\u0131ndaki ili\u015fkiyi ilk defa bu kadar kapsaml\u0131 \u015fekilde ortaya koyan bu \u00e7al\u0131\u015fma, literat\u00fcrde paradigma de\u011fi\u015fikli\u011fi anlam\u0131na geliyor. Daha \u00f6nce t\u00fcm\u00f6r\u00fcn kendi mutasyonlar\u0131na ve mikro\u00e7evresel fakt\u00f6rlere odaklan\u0131l\u0131rken, \u015fimdi hematopoietik sistemden kaynaklanan mutant ba\u011f\u0131\u015f\u0131kl\u0131k h\u00fccrelerinin t\u00fcm\u00f6r\u00fcn yeniden programlanmas\u0131ndaki etkisi anla\u015f\u0131lm\u0131\u015f oldu. Bu bulgular, CHIP destekli TI-CH\u2019nin, kanser h\u00fccre davran\u0131\u015f\u0131n\u0131 ve ba\u011f\u0131\u015f\u0131kl\u0131k ka\u00e7\u0131\u015f\u0131n\u0131 nas\u0131l mod\u00fcle etti\u011finin molek\u00fcler mekanizmalar\u0131n\u0131n ke\u015ffi i\u00e7in yeni ara\u015ft\u0131rma alanlar\u0131 a\u00e7\u0131yor.<\/p>\n
Ara\u015ft\u0131rmayla ortaya konulan \u00f6n\u00fcm\u00fczdeki ad\u0131mlar, CHIP\u2019in agresif kanser fenotipleriyle sebep-sonu\u00e7 ili\u015fkilerini netle\u015ftirmek, miyeloid h\u00fccrelerin t\u00fcm\u00f6r i\u00e7ine s\u0131zmas\u0131n\u0131 ve \u00e7o\u011falmas\u0131n\u0131 tetikleyen sinyal yollar\u0131n\u0131 a\u00e7\u0131klamak \u015feklinde \u00f6zetleniyor. B\u00f6ylece hem mutant h\u00fccrelerin da\u011f\u0131l\u0131m\u0131n\u0131 hedef alan hem de t\u00fcm\u00f6r destekli etkilerini tersine \u00e7evirmeye y\u00f6nelik yenilik\u00e7i tedaviler geli\u015ftirilebilir. Ya\u015flanmaya ba\u011fl\u0131 bu genetik de\u011fi\u015fiklikler art\u0131k sadece ya\u015fl\u0131l\u0131k belirtisi de\u011fil, tedavi odakl\u0131 klinik hedefler haline gelebilir.<\/p>\n
Bu ara\u015ft\u0131rman\u0131n \u00f6nc\u00fclerinden Oriol Pich \u015fu g\u00f6r\u00fc\u015fleri payla\u015ft\u0131: \u201cYa\u015fla birlikte kan h\u00fccrelerinde g\u00f6r\u00fclen mutasyonlar pasif bir izleyici olman\u0131n \u00f6tesinde, t\u00fcm\u00f6rlerin i\u00e7ine girip kanserin evrimini \u015fekillendirerek hasta sonu\u00e7lar\u0131n\u0131 etkiliyor.\u201d Francis Crick Enstit\u00fcs\u00fc\u2019nden Charlie Swanton ise, \u201cYa\u015flanmaya ba\u011fl\u0131 kemik ili\u011fi mutasyonlar\u0131n\u0131n solid t\u00fcm\u00f6r geli\u015fimiyle birle\u015fti\u011fi bu geni\u015f \u00f6l\u00e7ekli \u00e7al\u0131\u015fma, kansere bak\u0131\u015f\u0131m\u0131zda ve tedavi y\u00f6ntemlerimizin dizayn\u0131nda yeni bir \u00e7a\u011f\u0131 m\u00fcjdeliyor,\u201d ifadelerini kulland\u0131.<\/p>\n
Cancer Research UK ve NIHR UCLH Biyomedikal Ara\u015ft\u0131rma Merkezi\u2019nin destekledi\u011fi bu etkileyici ara\u015ft\u0131rma, 23 Nisan 2025\u2019te New England Journal of Medicine\u2019de yay\u0131mlanarak ya\u015flanma ve kanserin kesi\u015fim noktas\u0131ndaki karanl\u0131k alanlar\u0131 ayd\u0131nlatmaya ba\u015flad\u0131. Klinik onkoloji alan\u0131nda hastalar\u0131n genetik kan h\u00fccresi profillerinin dikkate al\u0131nmas\u0131, risk de\u011ferlendirmeleri ve tedavi tasar\u0131mlar\u0131nda yeni standartlar\u0131n \u00f6n\u00fcn\u00fc a\u00e7acak bu geli\u015fme, ya\u015fa ba\u011fl\u0131 klonal hematopoezin kanser tedavisinde kritik bir fakt\u00f6r olarak ele al\u0131nmas\u0131 gerekti\u011fini ortaya koyuyor.<\/p>\n
—<\/p>\n
Ara\u015ft\u0131rma Konusu<\/strong>: Hayvanlar<\/p>\n Makale Ba\u015fl\u0131\u011f\u0131<\/strong>: Tumor-Infiltrating Clonal Hematopoiesis<\/p>\n Haberin Yay\u0131n Tarihi<\/strong>: 23 Nisan 2025<\/p>\n Web References<\/strong>: Pich, O. et al. (2025). Tumor-Infiltrating Clonal Hematopoiesis. New England Journal of Medicine.<\/p>\n Anahtar Kelimeler<\/strong>: Akci\u011fer kanseri, Miyeloid h\u00fccreler, Ya\u015fa ba\u011fl\u0131 genetik de\u011fi\u015fiklikler, Clonal hematopoez, T\u00fcm\u00f6r mikro\u00e7evresi, TET2 mutasyonu, Tedavi direnci, Kanser sa\u011fkal\u0131m\u0131, Solid t\u00fcm\u00f6rler, \u0130mm\u00fcn sistem ka\u00e7\u0131\u015f\u0131, TRACERx \u00e7al\u0131\u015fmas\u0131, PEACE protokol\u00fc<\/p>\n","protected":false},"excerpt":{"rendered":" Son y\u0131llar\u0131n en \u00f6nemli kanser ara\u015ft\u0131rmalar\u0131ndan biri, ya\u015flanmayla birlikte ortaya \u00e7\u0131kan kan h\u00fccresi mutasyonlar\u0131n\u0131n solid t\u00fcm\u00f6rleri do\u011frudan etkiledi\u011fini ve hastalar\u0131n sa\u011fkal\u0131m\u0131n\u0131 olumsuz y\u00f6nde etkiledi\u011fini ortaya koydu. Francis Crick Enstit\u00fcs\u00fc, University College London (UCL), Gustave Roussy ve Memorial Sloan Kettering Kanser Merkezi (MSK) gibi d\u00fcnyaca tan\u0131nm\u0131\u015f enstit\u00fclerden ara\u015ft\u0131rmac\u0131lar\u0131n ortak \u00e7al\u0131\u015fmas\u0131yla y\u00fcr\u00fct\u00fclen bu kapsaml\u0131 \u00e7al\u0131\u015fma, ya\u015fa ba\u011fl\u0131…<\/p>\n","protected":false},"author":1,"featured_media":3671,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","_yoast_wpseo_focuskw":"","rank_math_title":"","rank_math_description":"","rank_math_focus_keyword":"","_wpan_schema_json_ld":"","_wpan_ai_seo_metadata":"","_wpan_ai_seo_status":"","_wpan_ai_seo_policy":"","_wpan_ai_seo_faq_block":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[28],"tags":[2720,2716,2718,2719,2717],"tmauthors":[],"class_list":{"0":"post-3670","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-kanser","8":"tag-kanser-hastalarinda-genetik-degisikliklerin-etkisi","9":"tag-kanser-prognozu","10":"tag-klonal-hematopoez-chip-ve-kanser-iliskisi","11":"tag-tumor-infiltrasyonlu-klonal-hematopoez-ti-ch","12":"tag-yaslanma-ile-kan-hucresi-mutasyonlari"},"jetpack_featured_media_url":"https:\/\/haber360.com\/wp-content\/uploads\/2025\/04\/Kan-Yaslanmasi-ve-Genetik-Degisikliklerin-Kanser-Prognozu-1745444675.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/posts\/3670","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/comments?post=3670"}],"version-history":[{"count":0,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/posts\/3670\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/media\/3671"}],"wp:attachment":[{"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/media?parent=3670"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/categories?post=3670"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/tags?post=3670"},{"taxonomy":"tmauthors","embeddable":true,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/tmauthors?post=3670"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}