Related Experiment Videos
HGF regulates the development of cortical pyramidal dendrites
Humberto Gutierrez1, Xavier Dolcet, Mary Tolcos
1Department Preclinical Veterinary Sciences, Royal (Dick) Studies, University of Edinburgh, Summerhall Square, Edinburgh EH9 1QH, UK. humberto.g@ed.ac.uk
Development (Cambridge, England)
|July 2, 2004
Summary
Hepatocyte growth factor (HGF) signaling through its receptor MET is crucial for dendritic arbor development in the developing brain. HGF promotes neuron growth and branching, while blocking HGF or MET function impairs it.
Area of Science:
- Neuroscience
- Developmental Biology
- Cell Signaling
Background:
- Hepatocyte growth factor (HGF) and its receptor tyrosine kinase MET are present in the central nervous system.
- The specific function of MET signaling in the brain remains largely uncharacterized.
Purpose of the Study:
- To investigate the role of HGF and MET signaling in the development of dendritic arbors in pyramidal neurons of the cerebral cortex.
Main Methods:
- Utilized particle-mediated gene transfer in organotypic slice cultures from early postnatal mice.
- Administered exogenous HGF and employed function-blocking anti-HGF antibodies.
- Transfected neurons with a dominant-negative MET receptor mutant.
Main Results:
- Exogenous HGF significantly increased dendritic growth and branching in layer 2 pyramidal neurons.
- Inactivation of endogenous HGF markedly reduced dendritic arbor size and complexity.
- Expression of a dominant-negative MET receptor also resulted in smaller, less complex dendritic arbors.
Conclusions:
- HGF signaling via MET plays a significant role in regulating dendritic morphology during cerebral cortex development.
- This study elucidates a key pathway influencing neuronal structure in the developing brain.