title: Transcription factor nuclear factor erythroid-2 mediates expression of the cytokine interleukin 8, a known predictor of inferior outcome in patients with myeloproliferative neoplasms.
abstract: The transcription factor nuclear factor erythroid-2 is over-expressed in patients with myeloproliferative neoplasms irrespective of the presence of the JAK2(V617F) mutation. Our transgenic mouse model over-expressing nuclear factor erythroid-2, which recapitulates many features of myeloproliferative neoplasms including transformation to acute myeloid leukemia, clearly implicates this transcription factor in the pathophysiology of myeloproliferative neoplasms. Because the targets mediating nuclear factor erythroid-2 effects are not well characterized, we conducted microarray analysis of CD34(+) cells lentivirally transduced to over-express nuclear factor erythroid-2 or to silence this transcription factor via shRNA, in order to identify novel target genes. Here, we report that the cytokine interleukin 8 is a novel target gene. Nuclear factor erythroid-2 directly binds the interleukin 8 promoter in vivo, and these binding sites are required for promoter activity. Serum levels of interleukin 8 are known to be elevated in both polycythemia vera and primary myelofibrosis patients. Recently, increased interleukin 8 levels have been shown to be predictive of inferior survival in primary myelofibrosis patients in multivariate analysis. Therefore, one of the mechanisms by which nuclear factor erythroid-2 contributes to myeloproliferative neoplasm pathology may be increased interleukin 8 expression.
authors: Department of Hematology/Oncology, Center for Clinical Research, University Hospital Freiburg, Freiburg, Germany.
authors: Julius
authors: J
authors: Wehrle
authors: Thalia S
authors: TS
authors: Seeger
authors: Sven
authors: S
authors: Schwemmers
authors: Dietmar
authors: D
authors: Pfeifer
authors: Alla
authors: A
authors: Bulashevska
authors: Heike L
authors: HL
authors: Pahl
mesh_terms: D000818:Animals; D018952:Antigens, CD34 / Q000235:genetics; D015972:Gene Expression Regulation, Neoplastic; D018390:Gene Targeting / Q000379:methods; D005822:Genetic Vectors / Q000008:administration & dosage; D006801:Humans; D016209:Interleukin-8 / Q000096:biosynthesis* / Q000235:genetics; D016086:Lentivirus / Q000235:genetics; D051379:Mice; D054437:Myelodysplastic-Myeloproliferative Diseases / Q000175:diagnosis / Q000235:genetics / Q000378:metabolism*; D050984:NF-E2 Transcription Factor, p45 Subunit / Q000502:physiology*; D011237:Predictive Value of Tests; D011485:Protein Binding / Q000235:genetics; D016896:Treatment Outcome; D014407:Tumor Cells, Cultured; D020298:U937 Cells
chemical_list: D018952:Antigens, CD34; D016209:Interleukin-8; D050984:NF-E2 Transcription Factor, p45 Subunit; C494692:NFE2 protein, human