Abstract
AbstractCSF-1 is the major regulator of tissue macrophage development and function. A GM-CSF-dependent, CSF-1 receptor (CSF-1R)-deficient F4/80hiMac-1+Gr1–CD11c+ bone marrow macrophage (BMM) line (MacCsf1r−/−) was developed to study the roles of the eight intracellular CSF-1R tyrosines phosphorylated upon receptor activation. Retroviral expression of the wild-type CSF-1R rescued the CSF-1-induced survival, proliferation, differentiation, and morphological characteristics of primary BMM. Mutation of all eight tyrosines failed to rescue, whereas the individual Y → F mutants (544, 559, 697, 706, 721, 807, 921, 974) rescued these CSF-1-inducible phenotypes to varying degrees. The juxtamembrane domain Y559F and activation loop Y807F mutations severely compromised proliferation and differentiation, whereas Y706, Y721F, and Y974F mutations altered morphological responses, and Y706F increased differentiation. Despite their retention of significant in vitro tyrosine kinase activity, Y559F and Y807F mutants exhibited severely impaired in vivo receptor tyrosine phosphorylation, consistent with the existence of cellular mechanisms inhibiting CSF-1R tyrosine phosphorylation that are relieved by phosphorylation of these two sites. The MacCsf1r−/− macrophage line will facilitate genetic and proteomic approaches to CSF-1R structure/function studies in the major disease-related CSF-1R-expressing cell type.
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Dates
Type | When |
---|---|
Created | 17 years, 3 months ago (June 2, 2008, 8:58 p.m.) |
Deposited | 2 years, 3 months ago (May 18, 2023, 12:41 p.m.) |
Indexed | 4 days, 23 hours ago (Aug. 31, 2025, 7:11 p.m.) |
Issued | 17 years, 3 months ago (June 2, 2008) |
Published | 17 years, 3 months ago (June 2, 2008) |
Published Online | 17 years, 3 months ago (June 2, 2008) |
Published Print | 17 years ago (Sept. 1, 2008) |
Funders
2
National Institutes of Health
10.13039/100000002
Region: Americas
gov (National government)
Labels
3
- Institutos Nacionales de la Salud
- US National Institutes of Health
- NIH
Awards
3
- PO1 CA 100324
- CA26504
- KO8 CA097348
Albert Einstein College of Medicine Cancer Center
Awards
1
- 5P30-CA13330
@article{Yu_2008, title={CSF-1 receptor structure/function in MacCsf1r–/– macrophages: regulation of proliferation, differentiation, and morphology}, volume={84}, ISSN={1938-3673}, url={http://dx.doi.org/10.1189/jlb.0308171}, DOI={10.1189/jlb.0308171}, number={3}, journal={Journal of Leukocyte Biology}, publisher={Oxford University Press (OUP)}, author={Yu, Wenfeng and Chen, Jian and Xiong, Ying and Pixley, Fiona J and Dai, Xu-Ming and Yeung, Yee-Guide and Stanley, E Richard}, year={2008}, month=jun, pages={852–863} }