Abstract:
:The JAK2V617F mutation is part of the major criteria for diagnosis of myeloproliferative neoplasms (MPN). Allele-specific quantitative PCR (qPCR) is the most prevalent method used in laboratories but with the advent of next-generation sequencing (NGS) techniques, we felt necessary to evaluate this approach for JAK2 mutations testing. Among DNA samples from 427 patients analyzed by qPCR and NGS, we found an excellent concordance between both methods when allelic burden was superior to 2% (the detection limit of our NGS assay). Only one sample among 298 was found negative by NGS while allelic burden by qPCR was 3%. Because NGS detection limit is higher, sensitivity was lower as exemplified by 21 samples found negative whereas qPCR measured allelic burdens between 0.1 and 1%. Importantly, quantitative data of samples found positive by both techniques were highly correlated (R2 = 0.9477). We also evaluated 40 samples tested for JAK2 exon 12 mutations by HRM. The concordance with NGS was of 100%. Using NGS, the full coding region of JAK2 was analyzed leading to identification of several variants outside of exon 12 and 14 which were previously described or not. Interestingly, we found one somatic mutation (c.1034A>T p.H345L) which induced constitutive activation of the JAK/STAT pathway leading to an increased proliferation of BaF/3 cells with low-dose EPO. This study showed that NGS is a robust method highly correlated to qPCR, although less sensitive, but providing the opportunity to identify other JAK2 variants with potential impact on disease initiation or evolution.
journal_name
Ann Hematoljournal_title
Annals of hematologyauthors
Maslah N,Verger E,Schlageter MH,Miclea JM,Kiladjian JJ,Giraudier S,Chomienne C,Cassinat Bdoi
10.1007/s00277-018-3499-ysubject
Has Abstractpub_date
2019-01-01 00:00:00pages
111-118issue
1eissn
0939-5555issn
1432-0584pii
10.1007/s00277-018-3499-yjournal_volume
98pub_type
杂志文章abstract::Eculizumab is indicated for the therapy of patients with symptomatic paroxysmal nocturnal hemoglobinuria (PNH). Due to inhibition of terminal complement cascade, patients on eculizumab are susceptible to Neisseria meningitidis infections. The two mainstays to reduce the risk of infection are vaccination and antibiotic...
journal_title:Annals of hematology
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journal_title:Annals of hematology
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journal_title:Annals of hematology
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更新日期:2009-01-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章,多中心研究
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abstract::The clinical impact of KIT mutations in core binding factor acute myeloid leukemia (CBF-AML) is still unclear. In the present study, we analyzed the prognostic significance of each KIT mutation (D816, N822K, and other mutations) in Japanese patients with CBF-AML. We retrospectively analyzed 136 cases of CBF-AML that h...
journal_title:Annals of hematology
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abstract::Immune thrombocytopenia (ITP) is characterised by a transient or persistent decrease in platelets accompanied by an increased risk of bleeding, which can have a significant negative impact on patients' health-related quality of life. The condition has long been associated with an increased rate of immune-mediated plat...
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pub_type: 杂志文章,评审
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journal_title:Annals of hematology
pub_type: 杂志文章,meta分析
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journal_title:Annals of hematology
pub_type: 临床试验,杂志文章,多中心研究
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journal_title:Annals of hematology
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doi:10.1007/BF01715138
更新日期:1994-02-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/BF00663016
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abstract::In this report we show that serum has differentiation-inducing effects on primitive hematopoietic progenitor cells with the CD34++CD38- immunophenotype. Using the pre-colony forming unit (pre-CFU) assay as a model for early myelopoiesis, we compared the effects of serum-containing and serum-free media and evaluated di...
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journal_title:Annals of hematology
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pub_type: 临床试验,杂志文章,多中心研究
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journal_title:Annals of hematology
pub_type: 杂志文章,多中心研究,评审
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abstract::A case of an 82-year-old man who suffered an acute ST-elevation myocardial infarction while receiving treatment with intravenous immunoglobulin (IVIg) for thrombocytopenia is discussed. A total of 29 other cases of thromboembolism related to IVIg therapy have been reported, and the incidence seems to be especially hig...
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journal_title:Annals of hematology
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