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- W1986333462 abstract "V658F and L783F occurred in 4 leukemia patients, while the p.V658F mutation was found in 1 patient with APL [3] . In our previous report, the JAK1 mutation was found in 3 out of 49 in acute T-lymphocytic leukemia patients [4] . To explore the frequency of the JAK1 mutation in APL, we performed JAK1 gene sequencing in a group of APL patients in our center. This study was approved by the Ethics Committee of the First Affiliated Hospital of Soochow University. Informed consent was provided following the Declaration of Helsinki. A total of 86 patients with de novo APL were screened in all 24 exons of JAK1 using genomic DNA-PCR amplification sequencing. The clinical characteristics of these patients are listed in table 1 . Bone marrow was aspirated and cultured with colcemid overnight at 37 ° C and harvested according to standard procedures [5] . Karyotypic analysis was performed on R-banded metaphases and described according to the recommendations of the ISCN. Metaphases were analyzed by R banding and karyotype showed that 82 out of 84 patients were t(15; 17) with a positive PML/RARα fusion gene, while 1 patient displayed t(11; 17) with the PLZF/RARα fusion gene. Total DNA was extracted from bone marrow using a DNA Acute promyelocytic leukemia (APL) is a distinct subtype of acute myeloid leukemia characterized by a chromosome translocation of t(15; 17)(q24;q21) which involves fusion of the retinoic acid receptor α (RARα) gene in chromosome 17 and the promyelocytic leukemia (PML) gene in chromosome 15. The fusion protein encoded by the PML/ RARα gene makes APL sensitive to alltrans retinoic acid, a derivative of vitamin A. With the introduction of all-trans retinoic acid and arsenic trioxide in the past several decades, the complete remission (CR) rate and 5-year diseasefree survival for APL were elevated to more than 90% [1] . The Janus kinase (JAK) is a nonreceptor tyrosine kinase, including 4 family members, i.e. JAK1, JAK2, JAK3, and TYK2. The JAK1 gene is organized into 25 exons, including 24 coding exons, and spans about 133.28 Kb in the chromosome 1p31.3 region, which is responsible for transducing cytokine-induced signals via JAK-STAT pathway aberrations; JAK1 signal activation is partially responsible for leukemogenesis. Recently, Wartman et al. [2] found Jak1 (V657F) in a murine APL model via whole genomic sequencing. This Jak1 (V657F) was identified in 6 other mice that were not closely related to the proband [2] . After analyzing 186 acute adulthood leukemias, 30 multiple myelomas, and 278 common solid cancers, Jeong et al. [3] discovered 4 JAK1 mutations in patients with acute leukemia. Among them, the JAK1 mutations Received: November 29, 2012 Accepted after revision: February 28, 2013 Published online: July 11, 2013" @default.
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- W1986333462 date "2013-01-01" @default.
- W1986333462 modified "2023-10-16" @default.
- W1986333462 title "Rare Occurrence of the JAK1 Mutation in Acute Promyelocytic Leukemia Patients" @default.
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- W1986333462 doi "https://doi.org/10.1159/000350487" @default.
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