Abstract
Micro RNA (miRNA) are small non-coding RNA molecules which have a post-transcriptional inhibitory regulation function, e.g. in megakaryopoiesis. A characteristic of Philadelphia chromosome-negative myeloproliferative neoplasm (Ph− MPN) is the abundance of morphologically aberrant megakaryocytes. Based on previously published in vitro megakaryocytic differentiation assay data, we selected miRNA 10a, 17-5p, 20a and 126 and potential target proteins (HOXA1, RUNX1) for analysis of laser-microdissected bone marrow megakaryocytes from Ph− MPN and controls (n = 66). Furthermore, we tested a potential influence of cytoreductive treatment on miRNA expression in bone marrow cells during the course of Ph− MPN (n = 18). In summary, miRNA 17-5p, 20a and 126 are constitutively expressed in Ph− MPN megakaryopoiesis while low or absent miRNA 10a appeared to correlate with strong megakaryocytic HOXA1 protein expression. No association to thrombocytosis, JAK2V617F mutations or cytoreductive treatment (bone marrow cells) were observed.
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Acknowledgements
The authors wish to thank Ms. Sabine Schröter and Ms. Anna-Lena Becker for their skilful work in the laboratory.
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Research grant: Deutsche Krebshilfe, Dr. Mildred Scheel Stiftung 10-2191 (O.B., H.K.); Deutsche Forschungsgemeinschaft-DFG BO 1954/1-1 (O.B., H.K.); Hochschul-interne Leistungsförderung-HiLF 11/07, Medizinische; Hochschule Hannover (K.H.)
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Supplementary Table 1
Megakaryocytic HOXA1 and RUNX1 protein expression and the corresponding miRNA 10a, 17-5p, 20a and 126. Representative immunohistological images are depicted in Fig. 2. A subfraction of cases (34/66) was analysed for megakaryocytic HOXA1 and RUNX1 protein expression. Abbreviations: megakaryocytes (MK), not determined (ND). (DOC 111 KB)
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Hussein, K., Dralle, W., Theophile, K. et al. Megakaryocytic expression of miRNA 10a, 17-5p, 20a and 126 in Philadelphia chromosome-negative myeloproliferative neoplasm. Ann Hematol 88, 325–332 (2009). https://doi.org/10.1007/s00277-008-0602-9
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DOI: https://doi.org/10.1007/s00277-008-0602-9