Related Experiment Video
Updated: Mar 7, 2026
Isolation of Cerebrospinal Fluid from Rodent Embryos for use with Dissected Cerebral Cortical Explants
Published on: March 11, 2013
Regulation of Embryonic and Postnatal Development by the CSF-1 Receptor
Violeta Chitu1, E Richard Stanley1
1Albert Einstein College of Medicine, Bronx, NY, United States.
Abstract:
Macrophages are found in all tissues and regulate tissue morphogenesis during development through trophic and scavenger functions. The colony stimulating factor-1 (CSF-1) receptor (CSF-1R) is the major regulator of tissue macrophage development and maintenance. In combination with receptor activator of nuclear factor κB (RANK), the CSF-1R also regulates the differentiation of the bone-resorbing osteoclast and controls bone remodeling during embryonic and early postnatal development. CSF-1R-regulated macrophages play trophic and remodeling roles in development. Outside the mononuclear phagocytic system, the CSF-1R directly regulates neuronal survival and differentiation, the development of intestinal Paneth cells and of preimplantation embryos, as well as trophoblast innate immune function. Consistent with the pleiotropic roles of the receptor during development, CSF-1R deficiency in most mouse strains causes embryonic or perinatal death and the surviving mice exhibit multiple developmental and functional deficits. The CSF-1R is activated by two dimeric glycoprotein ligands, CSF-1, and interleukin-34 (IL-34). Homozygous Csf1-null mutations phenocopy most of the deficits of Csf1r-null mice. In contrast, Il34-null mice have no gross phenotype, except for decreased numbers of Langerhans cells and microglia, indicating that CSF-1 plays the major developmental role. Homozygous inactivating mutations of the Csf1r or its ligands have not been reported in man. However, heterozygous inactivating mutations in the Csf1r lead to a dominantly inherited adult-onset progressive dementia, highlighting the importance of CSF-1R signaling in the brain.
Insights
The colony-stimulating factor-1 receptor (CSF-1R) is crucial for tissue macrophage development and has diverse roles in neuronal survival and embryonic development. Deficiencies in CSF-1R signaling can lead to severe developmental issues and adult-onset dementia.
Area of Science:
- Developmental Biology
- Immunology
- Neuroscience
Background:
- Macrophages, regulated by the colony-stimulating factor-1 receptor (CSF-1R), are vital for tissue development and homeostasis.
- CSF-1R signaling, in conjunction with RANK, also influences osteoclast differentiation and bone remodeling.
- Beyond the immune system, CSF-1R impacts neuronal survival, intestinal cell development, and embryonic development.
Purpose of the Study:
- To elucidate the critical roles of CSF-1R in tissue morphogenesis and development.
- To investigate the specific contributions of CSF-1 and IL-34 ligands to CSF-1R function.
- To highlight the implications of CSF-1R signaling in neurological health and disease.
Main Methods:
- Analysis of mouse models with genetic deficiencies in CSF-1R and its ligands (CSF-1, IL-34).
- Phenotypic characterization of developmental and functional deficits in mutant mice.
- Review of human genetic data linking CSF-1R mutations to neurological disorders.
Main Results:
- CSF-1R deficiency leads to embryonic or perinatal lethality and significant developmental abnormalities in mice.
- CSF-1 appears to be the primary ligand mediating CSF-1R's developmental roles, as Il34-null mice show only minor phenotypes.
- Heterozygous inactivating mutations in CSF-1R are associated with adult-onset progressive dementia in humans.
Conclusions:
- CSF-1R is indispensable for normal development, with critical roles in macrophage biology, osteoclastogenesis, and non-immune cell functions.
- CSF-1 is the predominant ligand driving CSF-1R-mediated development.
- Dysregulation of CSF-1R signaling has profound implications for both development and adult neurological health, underscoring its therapeutic potential.
Related Concept Videos
01:01Regulation of Hematopoietic Stem Cells
02:33Hedgehog Signaling Pathway
01:24Regulation of Angiogenesis and Blood Supply
03:14Notch Signaling Pathway
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
01:51Determination
01:12Role Of Notch Signalling In Intestinal Stem Cell Renewal
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...