Abstract:
:We report essential roles of zinc finger transcription factor Gfi-1 in myeloid development. Gene-targeted Gfi-1(-/-) mice lack normal neutrophils and are highly susceptible to abscess formation by gram-positive bacteria. Arrested, morphologically atypical, Gr1(+)Mac1(+) myeloid cells expand with age in the bone marrow. RNAs encoding primary but not secondary or tertiary neutrophil (granulocyte) granule proteins are expressed. The atypical Gr1(+)Mac1(+) cell population shares characteristics of both the neutrophil and macrophage lineages and exhibits phagocytosis and respiratory burst activity. Reexpression of Gfi-1 in sorted Gfi-1(-/-) progenitors ex vivo rescues neutrophil differentiation in response to G-CSF. Thus, Gfi-1 not only promotes differentiation of neutrophils but also antagonizes traits of the alternate monocyte/macrophage program.
journal_name
Immunityjournal_title
Immunityauthors
Hock H,Hamblen MJ,Rooke HM,Traver D,Bronson RT,Cameron S,Orkin SHdoi
10.1016/s1074-7613(02)00501-0keywords:
subject
Has Abstractpub_date
2003-01-01 00:00:00pages
109-20issue
1eissn
1074-7613issn
1097-4180pii
S1074-7613(02)00501-0journal_volume
18pub_type
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