Developmentally regulated collagen/integrin interactions confer adhesive properties to early postnatal neural stem
Tobias Bergström1, Karin Holmqvist2, Tatsiana Tararuk1
1Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, SE-75185 Uppsala Sweden.
Biochimica Et Biophysica Acta
|January 28, 2014
Summary
Early postnatal neural stem cells adhere to collagen I via integrin β1, a property lost in adult brain stem cells. This difference highlights the dynamic extracellular matrix regulation of the developing neurogenic niche.
Area of Science:
- Neuroscience
- Developmental Biology
- Stem Cell Biology
Background:
- The extracellular matrix regulates the neural stem cell niche.
- Neural stem and progenitor cells (NSPCs) from early postnatal mice adhere to collagen/hyaluronan hydrogels, unlike embryonic or adult NSPCs.
Purpose of the Study:
- To investigate the distinct adhesive properties of young versus adult neural stem cells.
- To understand the molecular mechanisms underlying NSPC adhesion to the extracellular matrix.
Main Methods:
- Culturing NSPCs from embryonic, postnatal day 6 (P6), and adult mouse brains on collagen I.
- Analyzing focal adhesions, integrin expression (β1, α2, α11), and gene expression profiles.
Main Results:
- Early postnatal NSPCs formed paxillin-positive focal adhesions on collagen I, dependent on integrin β1.
- Integrin α2 and α11 subunit levels were highest in postnatal NSPCs.
- P6 NSPCs showed higher expression of genes related to vasculature development and morphogenesis compared to adult NSPCs.
Conclusions:
- Adhesive properties of neural stem cells differ significantly between postnatal and adult stages.
- Integrin subunits expressed by early postnatal NSPCs mediate their unique matrix interactions, crucial for the developing neurogenic niche.
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