IFN consensus sequence binding protein (Icsbp) is critical for eosinophil development.
IFN consensus sequence binding protein (Icsbp) (IFN response factor-8) is a hematopoietic transcription factor with dual functions in myelopoiesis and immunity. In this study, we report a novel role of Icsbp in regulating the development of eosinophils. Loss of Icsbp in mice leads to a reduction of eosinophils in different tissues. During parasite infection with the nematode Nippostrongylus brasiliensis, Icsbp-deficient mice fail to mount eosinophilia despite a vigorous IL-5 response. Numbers of phenotypically defined eosinophil progenitors are decreased and those progenitors have, on a per-cell basis, reduced eosinophil differentiation potential. The transcription factor Gata1, crucial for eosinophil development, is reduced expressed in committed eosinophil progenitors in wells as mature eosinophils. These findings identify Icsbp as a novel transcription factor critical for the development of the eosinophil lineage.
Milanovic
Maja
M
Leibniz-Forschungsinstitut fuer Molekulare Pharmakologie, Berlin, Germany.
Terszowski
Grzegorz
G
Struck
Daniela
D
Liesenfeld
Oliver
O
Carstanjen
Dirk
D
D000818:Animals; D002454:Cell Differentiation / Q000235:genetics / Q000276:immunology*; D002478:Cells, Cultured; D016384:Consensus Sequence / Q000235:genetics / Q000276:immunology; D004802:Eosinophilia / Q000235:genetics / Q000276:immunology / Q000469:parasitology; D004804:Eosinophils / Q000276:immunology / Q000378:metabolism / Q000469:parasitology* / Q000473:pathology*; D050835:Interferon Regulatory Factors / Q000172:deficiency / Q000235:genetics / Q000502:physiology*; D007958:Leukocyte Count; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D009559:Nippostrongylus / Q000276:immunology; D051381:Rats; D011917:Rats, Inbred Lew; D017206:Strongylida Infections / Q000235:genetics / Q000276:immunology / Q000473:pathology; D014158:Transcription, Genetic / Q000276:immunology; D000099185:Interferon Regulatory Factor-8
D050835:Interferon Regulatory Factors; D000099185:Interferon Regulatory Factor-8