Gene and microRNA analysis of neutrophils from patients with polycythemia vera and essential thrombocytosis: down-regula
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BioMed Central
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Gene and microRNA analysis of neutrophils from patients with polycythemia vera and essential thrombocytosis: down-regulation of micro RNA-1 and -133a Stefanie Slezak1, Ping Jin1, Lorraine Caruccio1, Jiaqiang Ren1, Michael Bennett2, Nausheen Zia1, Sharon Adams1, Ena Wang1, Joao Ascensao3, Geraldine Schechter3 and David Stroncek*1 Address: 1Department of Transfusion Medicine, Clinical Center, National Institutes of Health, Bethesda, Maryland, USA, 2Department of Hematology, Emek Hospital, Afula, Israel and 3Hematology Section, Veterans Affairs Medical Center, Washington DC, USA Email: Stefanie Slezak - [email protected]; Ping Jin - [email protected]; Lorraine Caruccio - [email protected]; Jiaqiang Ren - [email protected]; Michael Bennett - [email protected]; Nausheen Zia - [email protected]; Sharon Adams - [email protected]; Ena Wang - [email protected]; Joao Ascensao - [email protected]; Geraldine Schechter - [email protected]; David Stroncek* - [email protected] * Corresponding author
Published: 4 June 2009 Journal of Translational Medicine 2009, 7:39
doi:10.1186/1479-5876-7-39
Received: 17 March 2009 Accepted: 4 June 2009
This article is available from: http://www.translational-medicine.com/content/7/1/39 © 2009 Slezak et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract Background: Since the V617F mutation in JAK2 may not be the initiating event in myeloprofilerative disorders (MPDs) we compared molecular changes in neutrophils from patients with polycythemia vera (PV) and essential thrombocythosis (ET), to neutrophils stimulated by GCSF administration and to normal unstimulated neutrophils Methods: A gene expression oligonucleotide microarray with more than 35,000 probes and a microRNA (miR) expression array with 827 probes were used to assess neutrophils from 6 MPD patients; 4 with PV and 2 with ET, 5 healthy subjects and 6 healthy subjects given G-CSF. In addition, neutrophil antigen expression was analyzed by flow cytometry and 64 serum protein levels were analyzed by ELISA. Results: Gene expression profiles of neutrophils from the MPD patients were similar but distinct from those of healthy subjects, either unstimulated or G-CSF-mobilized. The differentially expressed genes in MPD neutrophils were more likely to be in pathways involved with inflammation while those of G-CSF-mobilized neutrophils were more likely to belong to metabolic pathways. In MPD neutrophils the expression of CCR1 was increased and that of several NF-κB pathway genes were decreased. MicroRNA miR-133a and miR-1 in MPD neutrophils were down-regulated the most. Levels of 11 serum proteins were increased in MPD patients including MMP-10, MMP-13, VCAM, P-selectin, PDGF-BB and a CCR1 ligand, MIP-1α. Conclusion: These studi
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