دورية أكاديمية
Germline variants in ETV6 underlie reduced platelet formation, platelet dysfunction and increased levels of circulating CD34+ progenitors
| العنوان: | Germline variants in ETV6 underlie reduced platelet formation, platelet dysfunction and increased levels of circulating CD34+ progenitors |
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| المؤلفون: | Marjorie Poggi, Matthias Canault, Marie Favier, Ernest Turro, Paul Saultier, Dorsaf Ghalloussi, Veronique Baccini, Lea Vidal, Anna Mezzapesa, Nadjim Chelghoum, Badreddine Mohand-Oumoussa, Céline Falaise, Rémi Favier, Willem H. Ouwehand, Mathieu Fiore, Franck Peiretti, Pierre Emmanuel Morange, Noémie Saut, Denis Bernot, Andreas Greinacher, NIHR BioResource, Alan T. Nurden, Paquita Nurden, Kathleen Freson, David-Alexandre Trégouët, Hana Raslova, Marie-Christine Alessi |
| المصدر: | Haematologica, Vol 102, Iss 2 (2017) |
| بيانات النشر: | Ferrata Storti Foundation, 2017. |
| سنة النشر: | 2017 |
| المجموعة: | LCC:Diseases of the blood and blood-forming organs |
| مصطلحات موضوعية: | Diseases of the blood and blood-forming organs, RC633-647.5 |
| الوصف: | Variants in ETV6, which encodes a transcription repressor of the E26 transformation-specific family, have recently been reported to be responsible for inherited thrombocytopenia and hematologic malignancy. We sequenced the DNA from cases with unexplained dominant thrombocytopenia and identified six likely pathogenic variants in ETV6, of which five are novel. We observed low repressive activity of all tested ETV6 variants, and variants located in the E26 transformation-specific binding domain (encoding p.A377T, p.Y401N) led to reduced binding to corepressors. We also observed a large expansion of megakaryocyte colony-forming units derived from variant carriers and reduced proplatelet formation with abnormal cytoskeletal organization. The defect in proplatelet formation was also observed in control CD34+ cell-derived megakaryocytes transduced with lentiviral particles encoding mutant ETV6. Reduced expression levels of key regulators of the actin cytoskeleton CDC42 and RHOA were measured. Moreover, changes in the actin structures are typically accompanied by a rounder platelet shape with a highly heterogeneous size, decreased platelet arachidonic response, and spreading and retarded clot retraction in ETV6 deficient platelets. Elevated numbers of circulating CD34+ cells were found in p.P214L and p.Y401N carriers, and two patients from different families suffered from refractory anemia with excess blasts, while one patient from a third family was successfully treated for acute myeloid leukemia. Overall, our study provides novel insights into the role of ETV6 as a driver of cytoskeletal regulatory gene expression during platelet production, and the impact of variants resulting in platelets with altered size, shape and function and potentially also in changes in circulating progenitor levels. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0390-6078 1592-8721 |
| العلاقة: | https://haematologica.org/article/view/7968Test; https://doaj.org/toc/0390-6078Test; https://doaj.org/toc/1592-8721Test |
| DOI: | 10.3324/haematol.2016.147694 |
| الوصول الحر: | https://doaj.org/article/373f87248f02458bb1797cfbb7fb7965Test |
| رقم الانضمام: | edsdoj.373f87248f02458bb1797cfbb7fb7965 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 03906078 15928721 |
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| DOI: | 10.3324/haematol.2016.147694 |