Journals / Turkish Journal of Hematology / 2017 / Cilt: 34 - Sayı: 4

Normal Karyotipli İran’lı Erişkin Akut Miyeloid Lösemi Hastalarında FMS-Benzeri Tirozin Kinaz 3 (FLT3) ve Nükleofosmin 1 (NPM1): Mutasyon Durumu ile Klinik ve Laboratuvar Karakteristikleri

FMS-Like Tyrosine Kinase 3 (FLT3) and Nucleophosmin 1 (NPM1) in Iranian Adult Acute Myeloid Leukemia Patients with Normal Karyotypes: Mutation Status and Clinical and Laboratory Characteristics

Pages
300–306
DOI
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For detecting mutations, the FLT3 and NPM1 genes were amplified by the polymerase chain reaction method, followed by direct sequencing.Results: Our results showed that the frequencies of FLT3-ITD, FLT3TKD, and NPM1 mutations in CN-AML patients were 25.9%, 5.9%, and 20.8%, respectively.

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Objective & Hypothesis:Objective: In this study, we evaluated the frequency of FMS-like tyrosine kinase 3 (FLT3-ITD and FLT3-TKD) and nucleophosmin (NPM1) mutations in Iranian patients with cytogenetically normal acute myeloid leukemia (CN-AML).
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Key Findings & Data:The clinical and laboratory characteristics were compared between wild-type and mutant cases.Materials and Methods: Seventy newly diagnosed de novo AML patients were recruited at the time of diagnosis prior to chemotherapy; among them, 54 had CN-AML.
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Conclusion & Impact:For detecting mutations, the FLT3 and NPM1 genes were amplified by the polymerase chain reaction method, followed by direct sequencing.Results: Our results showed that the frequencies of FLT3-ITD, FLT3TKD, and NPM1 mutations in CN-AML patients were 25.9%, 5.9%, and 20.8%, respectively.
🔬Design:Research Article
📍Scope:1 hasta
⚙️Variables:Domain Parameters

Abstract

Objective: In this study, we evaluated the frequency of FMS-like tyrosine kinase 3 (FLT3-ITD and FLT3-TKD) and nucleophosmin (NPM1) mutations in Iranian patients with cytogenetically normal acute myeloid leukemia (CN-AML). The clinical and laboratory characteristics were compared between wild-type and mutant cases.Materials and Methods: Seventy newly diagnosed de novo AML patients were recruited at the time of diagnosis prior to chemotherapy; among them, 54 had CN-AML. For detecting mutations, the FLT3 and NPM1 genes were amplified by the polymerase chain reaction method, followed by direct sequencing.Results: Our results showed that the frequencies of FLT3-ITD, FLT3TKD, and NPM1 mutations in CN-AML patients were 25.9%, 5.9%, and 20.8%, respectively. The most frequent NPM1 mutation type was the type A mutation. The FLT3-ITD mutation was seen more frequently in non-M3 patients compared with M3 patients. No mutation was observed in either the FLT3-TKD or the NPM1 gene in patients in the M3 French-American-British group. There was no significant association between the presence of FLT3-ITD and NPM1 mutations in CN-AML patients (p>0.05). The frequency of FLT3-ITD, FLT3-TKD, and NPM1 mutation was higher in CN-AML patients in comparison with AML patients with cytogenetic aberrations, although the differences were not statistically significant (p>0.05). There were no significant differences in mean white blood cell and platelet counts, serum hemoglobin levels, and bone marrow blast percentages between patients with wild-type and mutant FLT3-ITD and NPM1 genes Sonuç: NPM1 hastalık sürecindeki yüksek kararlılığı nedeniyle, özellikle minimal kalıntı hastalık tespiti açısından FLT3 veya diğer bilinen genetik belirteçler ile kombine olarak hastaların izlenmesinde kullanılabilir

Özet

Öz Amaç: Bu çalışmada, İran'lı normal sitogenetikli akut miyeloid lösemi (NS-AML) hastalarında FMS-benzeri tirozin kinaz 3 (FLT3-ITD ve FLT3-TKD) ile nükleofosmin 1 (NPM1) mutasyonlarının sıklığını değerlendirdik. Mutant olmayan (yabanıl-wild-type) ve mutant olgular klinik ve laboratuvar özellikler açısından mukayese edildi.Gereç ve Yöntemler: Yetmiş yeni tanı de novo AML hastası kemoterapi uygulanması öncesinde çalısmaya dahil edildi; bunların 54'ü NS-AML idi. Mutasyonları tespit etmek için, FLT3 ve NPM1 genleri polimeraz zincir reaksiyonu ile amplifiye edildi ve bu işlemi direkt dizileme takip etti. Bulgular: NS-AML hastalarında FLT3-ITD, FLT3-TKD ve NPM1 mutasyonlarının sıklıkları sırasıyla %25,9; %5,9 ve %20,8 olarak bulunmuştur. En sık gözlenen NPM1 mutasyon tipi, tip A mutasyonuydu. FLT3-ITD mutasyonu M3 hastalarına göre M3-dışı olgularda daha sık görülmekteydi. Fransız-Amerikan-İngiliz M3 grubundaki hastalarda FLT3-TKD veya NPM1 genine ait mutasyon tespit edilmedi. NS-AML hastalarında FLT3-ITD ve NPM1 mutasyonlarının varlığı açısından anlamlı ilişki yoktu (p>0,05). FLT3-ITD, FLT3-TKD ve NPM1 mutasyon sıklığı, her ne kadar istatistiksel olarak anlamlı farklılık saptanmasa da (p>0,05), NS-AML hastalarında sitogenetik aberasyonu olan AML olgularına göre daha fazlaydı. FLT3-ITD ve NPM1 genleri açısından mutant olan ve olmayan hastalarda ortalama lökosit ve trombosit sayıları, serum hemoglobin düzeyleri ve kemik iliği blast yüzdeleri arasında anlamlı farklılık yoktu (p>0,05). Yaş ve cinsiyete göre FLT3ITD veya NPM1 mutasyonlarının sıklıkları açısından farklılık tespit edilmedi (p>0,05). Sonuç: NPM1 hastalık sürecindeki yüksek kararlılığı nedeniyle, özellikle minimal kalıntı hastalık tespiti açısından FLT3 veya diğer bilinen genetik belirteçler ile kombine olarak hastaların izlenmesinde kullanılabilir

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Cite This Article

REZAEİ, N., ARANDİ, N., VALİBEİGİ, B., HAGHPANAH, S., KHANSALAR, M., RAMZİ, M. (2017). Normal Karyotipli İran’lı Erişkin Akut Miyeloid Lösemi Hastalarında FMS-Benzeri Tirozin Kinaz 3 (FLT3) ve Nükleofosmin 1 (NPM1): Mutasyon Durumu ile Klinik ve Laboratuvar Karakteristikleri. Turkish Journal of Hematology, Cilt: 34 - Sayı: 4, 300–306. https://ajindex.com/articles/412740

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