Published in:
Open Access
01-12-2014 | Letter to the Editor
Activated fibronectin-secretory phenotype of mesenchymal stromal cells in pre-fibrotic myeloproliferative neoplasms
Authors:
Rebekka K Schneider, Susanne Ziegler, Isabelle Leisten, Monica SV Ferreira, Anne Schumacher, Björn Rath, Dirk Fahrenkamp, Gerhard Müller-Newen, Martina Crysandt, Stefan Wilop, Edgar Jost, Steffen Koschmieder, Ruth Knüchel, Tim H Brümmendorf, Patrick Ziegler
Published in:
Journal of Hematology & Oncology
|
Issue 1/2014
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Abstract
We characterized bone marrow stromal cells (BMSC) from patients with pre-fibrotic myeloproliferative neoplasms (MPN). MPN-BMSC showed decreased capacity to stimulate the proliferation of colony-forming units of normal hematopoietic stem and progenitor cells and displayed increased matrix remodelling (in particular fibronectin deposition) compared to control BMSC. This finding was confirmed in pre-fibrotic MPN bone marrow biopsies in a tissue microarray (n = 34), which stained positive for fibronectin in the absence of reticulin as a standard myelofibrosis marker. Fibronectin expression correlated significantly with reduced haemoglobin levels in MPN-patients (p = 0.007; R2 = 0.42). Our data show significant cell-intrinsic alterations in MPN-MSC and suggest that Fibronectin expression might be applicable as a biomarker for the identification of early myelofibrotic transformation in reticulin-negative MPN.