\u0130leri ya\u015fa ba\u011fl\u0131 olarak ba\u011f\u0131rsak mikrobiyotas\u0131nda meydana gelen de\u011fi\u015fikliklerin l\u00f6semi geli\u015fme riskini art\u0131rd\u0131\u011f\u0131na dair \u00e7\u0131\u011f\u0131r a\u00e7an bir ara\u015ft\u0131rma, Cincinnati \u00c7ocuk Hastanesi T\u0131p Merkezi\u2019nden bilim insanlar\u0131n\u0131n liderli\u011finde ger\u00e7ekle\u015ftirildi. Nature dergisinde 23 Nisan 2025 tarihinde yay\u0131mlanan bu deneysel \u00e7al\u0131\u015fma, ba\u011f\u0131rsak bakterilerinin \u00fcretmi\u015f oldu\u011fu baz\u0131 yan \u00fcr\u00fcnlerin kana kar\u0131\u015farak l\u00f6semi \u00f6ncesi uyku halinde bulunan h\u00fccrelerin \u00e7o\u011falmas\u0131n\u0131 tetikledi\u011fini ortaya koydu. Bu bulgular, sadece l\u00f6semiye de\u011fil, ya\u015fa ba\u011fl\u0131 inflamasyon ve belirsiz potansiyelli klonal hematopoez (CHIP) gibi daha geni\u015f sistemik sa\u011fl\u0131k sorunlar\u0131na da \u0131\u015f\u0131k tutuyor.<\/p>\n
Ya\u015flanma, kanser t\u00fcrleri aras\u0131nda \u00f6zellikle l\u00f6semi i\u00e7in en g\u00fc\u00e7l\u00fc risk fakt\u00f6r\u00fc olarak kabul edilirken, nedenleri tam olarak anla\u015f\u0131lamam\u0131\u015ft\u0131. Ara\u015ft\u0131rma ekibi, ya\u015fland\u0131k\u00e7a ba\u011f\u0131rsak duvar\u0131n\u0131n ge\u00e7irgenli\u011finin artt\u0131\u011f\u0131n\u0131 ve bunun sonucunda gram-negatif bakterilerin ya\u015fl\u0131 bireylerin ba\u011f\u0131rsak mikrobiyotas\u0131nda a\u015f\u0131r\u0131 \u00e7o\u011falan ADP-heptoz adl\u0131 \u015feker molek\u00fcl\u00fcn\u00fcn kana ge\u00e7i\u015f yapt\u0131\u011f\u0131n\u0131 tespit etti. Bu molek\u00fcl, hematopoetik h\u00fccrelerde sinyal yolaklar\u0131n\u0131 harekete ge\u00e7irerek, l\u00f6semi \u00f6ncesi klonal h\u00fccrelerin \u00e7o\u011falmas\u0131n\u0131 te\u015fvik eden bir uyar\u0131c\u0131 g\u00f6revi g\u00f6r\u00fcyor.<\/p>\n
Ara\u015ft\u0131rman\u0131n molek\u00fcler incelenmesinde, ADP-heptozun alg\u0131lanmas\u0131nda kritik rol oynayan TIFAsom ad\u0131 verilen, polimerle\u015fmi\u015f TIFA proteininden olu\u015fan h\u00fccre i\u00e7i sinyal komplekslerinin olu\u015fumu ortaya \u00e7\u0131kar\u0131ld\u0131. Ya\u015fl\u0131 bireylerin plazmas\u0131na maruz kalan kan h\u00fccrelerinde g\u00fc\u00e7l\u00fc TIFAsom \u00fcretimi g\u00f6zlemlenirken, gen\u00e7 bireylerden al\u0131nan plazmada bu reaksiyon olduk\u00e7a d\u00fc\u015f\u00fck seviyede kald\u0131. Bu ya\u015fa \u00f6zg\u00fc TIFAsom olu\u015fumu, ba\u011f\u0131rsak mikrobiyota metabolitleri ile hematopoetik h\u00fccrelerdeki premalign d\u00f6n\u00fc\u015f\u00fcm aras\u0131ndaki biyolojik k\u00f6pr\u00fcy\u00fc g\u00f6steriyor.<\/p>\n
Elde edilen bulgular\u0131 insan CHIP durumunu taklit eden fare modellerinde test eden ara\u015ft\u0131rmac\u0131lar, ADP-heptozun bu pre-l\u00f6semi h\u00fccrelerinde b\u00fcy\u00fcmeyi h\u0131zland\u0131rd\u0131\u011f\u0131n\u0131 saptad\u0131. Bu deneysel model, insan ya\u015flanmas\u0131nda g\u00f6zlenen patojenik zinciri birebir yans\u0131tmas\u0131 sebebiyle \u00e7al\u0131\u015fman\u0131n klinik uygulanabilirli\u011fini destekliyor. B\u00f6ylece ba\u011f\u0131rsak kaynakl\u0131 molek\u00fcler sinyallerin, kan kanserlerinin ortaya \u00e7\u0131k\u0131\u015f\u0131ndaki rol\u00fcn\u00fc deneysel olarak kan\u0131tlam\u0131\u015f oldu.<\/p>\n
ADP-heptozun etkisini m\u00fcmk\u00fcn k\u0131lan molek\u00fcler resept\u00f6r, mutant kan h\u00fccrelerinde bulunan sitozolik ALPK1 (alfa-protein kinaz 1) olarak belirlendi. Bu resept\u00f6re ba\u011flanan ADP-heptoz, TIFAsom olu\u015fumunu tetikleyen ve h\u00fccre \u00e7o\u011falmas\u0131na yol a\u00e7an sinyal yollar\u0131n\u0131 aktive ediyor. Hen\u00fcz klinikte ALPK1\u2019i hedef alan etkili ila\u00e7lar bulunmad\u0131\u011f\u0131 i\u00e7in, do\u011frudan bu yola m\u00fcdahale \u015fimdilik m\u00fcmk\u00fcn de\u011fil ancak bu hedef gelecekte ila\u00e7 geli\u015ftirme \u00e7al\u0131\u015fmalar\u0131na rehberlik edecek.<\/p>\n
Ara\u015ft\u0131rmada ayr\u0131ca ALPK1 sinyal yolunu bask\u0131layan alternatif bir mekanizma olarak UBE2N adl\u0131 ubiquitin ba\u011flay\u0131c\u0131 enzimin kritik rol\u00fc ke\u015ffedildi. UBE2N\u2019nin inhibisyonu, ADP-heptoz varl\u0131\u011f\u0131nda bile premalign h\u00fccrelerde \u00e7o\u011falmay\u0131 etkili bi\u00e7imde \u00f6nledi. Bu bulgu, ubiquitin arac\u0131l\u0131 i\u015faret yollar\u0131n\u0131 hedefleyerek klonal h\u00fccre program\u0131n\u0131 ve l\u00f6semi geli\u015fimini engelleme potansiyelini ortaya koyuyor. B\u00f6ylece ALPK1 d\u0131\u015f\u0131ndaki molek\u00fcler d\u00fczeylerde yeni ila\u00e7 tasar\u0131mlar\u0131 i\u00e7in umut do\u011fdu.<\/p>\n
CHIP, 70 ya\u015f \u00fczeri yeti\u015fkinlerin yakla\u015f\u0131k %10-20’sini etkileyen ve sadece hematolojik kanserlerle de\u011fil kardiovask\u00fcler, inflamatuar ve metabolik hastal\u0131klarla da ili\u015fkili kronik bir durum olarak biliniyor. Bu \u00e7al\u0131\u015fmada ba\u011f\u0131rsak mikrobiyotas\u0131 bozukluklar\u0131, sistemik inflamasyon ve klonal hematopoezin kesi\u015fme noktas\u0131 olarak ba\u011f\u0131rsak ekosistemi \u00f6n plana \u00e7\u0131kar\u0131ld\u0131. B\u00f6ylece ya\u015flanmayla ba\u011flant\u0131l\u0131 sa\u011fl\u0131k sorunlar\u0131nda ba\u011f\u0131rsak bariyeri b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fcn ve mikrobiyal dengenin korunmas\u0131 \u00f6nem arz ediyor.<\/p>\n
Klinik pratikte bu ara\u015ft\u0131rma, hastal\u0131ks\u0131z d\u00f6nemde yani pre-l\u00f6semi a\u015famas\u0131nda m\u00fcdahale edilerek l\u00f6seminin ilerlemesinin \u00f6nlenmesi fikrini destekliyor. \u00c7al\u0131\u015fma ekibi, ADP-heptoz sinyal aktivitesini \u00f6l\u00e7ebilen yeni bir TIFAsom testi geli\u015ftirerek erken te\u015fhis ve tedavi takibi i\u00e7in umut vadeden bir biyobelirte\u00e7 sundu. Bu y\u00f6ntem, ba\u011f\u0131rsak bariyeri bozukluklar\u0131 ve klonal hematopoez olan bireylerin risklerini saptamada kullan\u0131labilecek.<\/p>\n
Hedefe y\u00f6nelik ila\u00e7 geli\u015ftirme hen\u00fcz tamamlanmam\u0131\u015f olmas\u0131na ra\u011fmen, sa\u011fl\u0131kl\u0131 ba\u011f\u0131rsak floras\u0131 olu\u015fturman\u0131n ya\u015fa ba\u011fl\u0131 hastal\u0131klar i\u00e7in modifiye edilebilir bir risk fakt\u00f6r\u00fc oldu\u011fu mesaj\u0131 veriliyor. Prebiyotik ve probiyotik m\u00fcdahalelerin mikrobiyota kompozisyonunu olumlu etkileyebilece\u011fi belirtilirken, spesifik diyet ya da bakteriyel form\u00fclasyonlar\u0131n CHIP riskini azaltt\u0131\u011f\u0131na dair kan\u0131t hen\u00fcz elde edilmedi. Gelecekte yap\u0131lacak \u00e7al\u0131\u015fmalar, hangi bakteri t\u00fcrleri ve metabolitlerin hematopoetik klonal dinamikleri olumlu ya da olumsuz etkiledi\u011fini netle\u015ftirecek.<\/p>\n
Ara\u015ft\u0131rma, ABD Ulusal Sa\u011fl\u0131k Enstit\u00fcleri (NIH) ve \u00f6nemli vak\u0131flar taraf\u0131ndan desteklenerek, multidisipliner ve i\u015fbirlik\u00e7i bir yap\u0131yla ger\u00e7ekle\u015ftirildi. Cincinnati \u00dcniversitesi, Oxford \u00dcniversitesi ve Texas A&M \u00dcniversitesi\u2019nden uzmanlar\u0131n hematoloji, mikrobiyoloji, patoloji ve molek\u00fcler biyoloji alanlar\u0131ndaki katk\u0131lar\u0131 \u00e7al\u0131\u015fman\u0131n kapsaml\u0131 ve titiz olmas\u0131n\u0131 sa\u011flad\u0131. Metabolomik, ak\u0131\u015f sitometrisi ve genomik analizlerin yap\u0131ld\u0131\u011f\u0131 geli\u015fmi\u015f altyap\u0131 tesislerinin kullan\u0131m\u0131 ise \u00e7al\u0131\u015fman\u0131n ba\u015far\u0131s\u0131nda anahtar rol oynad\u0131.<\/p>\n
Son olarak, \u00e7al\u0131\u015fman\u0131n ba\u015f ara\u015ft\u0131rmac\u0131s\u0131 Dr. Daniel Starczynowski\u2019nin Kurome Therapeutics ile olan i\u015f birli\u011fi, temel ara\u015ft\u0131rmalardan klinik uygulamalara ge\u00e7i\u015f do\u011frultusunda hedefe y\u00f6nelik ila\u00e7 geli\u015ftirme \u00e7abalar\u0131n\u0131 yans\u0131t\u0131yor. ALPK1 yolunu hedef alan tedavi stratejileri i\u00e7in s\u00fcrd\u00fcr\u00fclmekte olan bu \u00e7al\u0131\u015fmalar, ya\u015fa ba\u011fl\u0131 l\u00f6semi riskinin azalt\u0131lmas\u0131na y\u00f6nelik umut verici bir gelecek vaat ediyor.<\/p>\n
Ba\u011f\u0131rsak mikrobiyotas\u0131ndaki de\u011fi\u015fikliklerin, mikrobiyal metabolitlerin kanser \u00f6ncesi h\u00fccrelerde yaratt\u0131\u011f\u0131 etkilerin ve klonal hematopoezin kesi\u015fti\u011fi bu ke\u015fif, ya\u015fl\u0131 n\u00fcfusta l\u00f6seminin nedenlerine dair bak\u0131\u015f a\u00e7\u0131s\u0131n\u0131 k\u00f6kten de\u011fi\u015ftiriyor. Genetik olmayan yeni bir risk fakt\u00f6r\u00fcn\u00fc ortaya koyan bu \u00e7al\u0131\u015fma, ba\u011f\u0131rsak ve hematopoetik sistemin kar\u015f\u0131l\u0131kl\u0131 ba\u011f\u0131ml\u0131l\u0131\u011f\u0131 \u00fczerinden sistemik sa\u011fl\u0131k kavram\u0131na b\u00fct\u00fcnc\u00fcl bir yakla\u015f\u0131m kazand\u0131r\u0131yor. Ara\u015ft\u0131rman\u0131n ilerleyen a\u015famalar\u0131nda, sa\u011fl\u0131kl\u0131 \u00f6mr\u00fc uzatma ve kanser y\u00fck\u00fcn\u00fc azaltmaya y\u00f6nelik \u00f6nleyici stratejiler ve yenilik\u00e7i tedaviler geli\u015ftirilece\u011fi \u00f6ng\u00f6r\u00fcl\u00fcyor.<\/p>\n
—<\/p>\n
Ara\u015ft\u0131rma Konusu<\/strong>: Human tissue samples Anahtar Kelimeler<\/strong>: Leukemia, Intestines, Cardiovascular disease, Disease prevention, Drug research, ADP-heptose and leukemia development, age-related inflammation and health, aging gut microbiota and leukemia risk, bacterial byproducts and blood cell proliferation, clonal hematopoiesis of indeterminate potential, elderly microbiome and disease progression, gut bacteria and cancer biology, intestinal permeability and blood cancers, leukemia research and aging, microbiota and immune system interactions, novel findings in cancer research, systemic health effects of gut microbiome<\/p>\n","protected":false},"excerpt":{"rendered":" \u0130leri ya\u015fa ba\u011fl\u0131 olarak ba\u011f\u0131rsak mikrobiyotas\u0131nda meydana gelen de\u011fi\u015fikliklerin l\u00f6semi geli\u015fme riskini art\u0131rd\u0131\u011f\u0131na dair \u00e7\u0131\u011f\u0131r a\u00e7an bir ara\u015ft\u0131rma, Cincinnati \u00c7ocuk Hastanesi T\u0131p Merkezi\u2019nden bilim insanlar\u0131n\u0131n liderli\u011finde ger\u00e7ekle\u015ftirildi. Nature dergisinde 23 Nisan 2025 tarihinde yay\u0131mlanan bu deneysel \u00e7al\u0131\u015fma, ba\u011f\u0131rsak bakterilerinin \u00fcretmi\u015f oldu\u011fu baz\u0131 yan \u00fcr\u00fcnlerin kana kar\u0131\u015farak l\u00f6semi \u00f6ncesi uyku halinde bulunan h\u00fccrelerin \u00e7o\u011falmas\u0131n\u0131 tetikledi\u011fini ortaya…<\/p>\n","protected":false},"author":1,"featured_media":3649,"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":[2663,2665,2662,2664,2661],"tmauthors":[],"class_list":{"0":"post-3648","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-kanser","8":"tag-adp-heptoz-ve-tifasom-sinyal-yolaklari","9":"tag-alpk1-reseptorunun-losemi-patogenezindeki-rolu","10":"tag-bagirsak-bakterilerinin-kanser-uzerindeki-etkileri","11":"tag-yasa-bagli-klonal-hematopoez-chip-ve-kanser-gelisimi","12":"tag-yaslanan-bagirsak-mikrobiyotasi-ve-losemi-riski"},"jetpack_featured_media_url":"https:\/\/haber360.com\/wp-content\/uploads\/2025\/04\/Yaslanan-Bagirsak-Florasi-ve-Losemi-Riski-1745423978.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/posts\/3648","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=3648"}],"version-history":[{"count":0,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/posts\/3648\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/media\/3649"}],"wp:attachment":[{"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/media?parent=3648"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/categories?post=3648"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/tags?post=3648"},{"taxonomy":"tmauthors","embeddable":true,"href":"https:\/\/haber360.com\/index.php\/wp-json\/wp\/v2\/tmauthors?post=3648"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nMakale Ba\u015fl\u0131\u011f\u0131<\/strong>: Microbial metabolite drives aging-related clonal hematopoiesis via ALPK1
\nHaberin Yay\u0131n Tarihi<\/strong>: April 23, 2025
\nWeb References<\/strong>: Cincinnati Children\u2019s Advanced Leukemia Therapies Program: https:\/\/www.cincinnatichildrens.org\/research\/divisions\/a\/advanced-leukemia-therapies\/programs
\nDoi Referans<\/strong>: 10.1038\/s41586-025-08938-8
\nResim Credits<\/strong>: Cincinnati Children\u2019s <\/p>\n