PRAM-1 is Required for Optimal Integrin-Dependent Neutrophil Function.
Publication/Presentation Date
12-1-2004
Abstract
PML-retinoic acid receptor alpha (RARalpha) regulated adaptor molecule 1 (PRAM-1) is an intracellular adaptor molecule that is upregulated during the induced granulocytic differentiation of promyelocytic leukemic cells and during normal human myelopoiesis. This report describes the generation of PRAM-1-deficient mice and an analysis of the function of this adaptor in neutrophil differentiation and mature neutrophil function. We demonstrate here that neutrophil differentiation is not impaired in PRAM-1-deficient mice and that PRAM-1-deficient neutrophils function normally following engagement of Fcgamma receptors. In contrast, mature PRAM-1-null neutrophils exhibit significant defects in adhesion-dependent reactive oxygen intermediate production and degranulation. Surprisingly, other integrin-dependent responses, such as cell spreading and activation of several signaling pathways, are normal. Together, these findings demonstrate the uncoupling of key integrin-dependent responses in the absence of PRAM-1 and show this adaptor to be critical for select integrin functions in neutrophils.
Volume
24
Issue
24
First Page
10923
Last Page
10932
ISSN
0270-7306
Published In/Presented At
Clemens, R. A., Newbrough, S. A., Chung, E. Y., Gheith, S., Singer, A. L., Koretzky, G. A., & Peterson, E. J. (2004). PRAM-1 is required for optimal integrin-dependent neutrophil function. Molecular And Cellular Biology, 24(24), 10923-10932.
Disciplines
Medical Pathology | Pathology
PubMedID
15572693
LVHN link
http://search.ebscohost.com/login.aspx?direct=true&db=mnh&AN=15572693&site=ehost-live&scope=site
Department(s)
Department of Pathology and Laboratory Medicine, Pathology Laboratory Medicine Faculty
Document Type
Article