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Multiple factors shape development of olfactory glomeruli: insights from an insect model system
1Arizona Research Laboratories Division of Neurobiology, University of Arizona, Tucson 85721, USA. lao@manduca.neurobio.arizona.edu
Journal of Neurobiology
|May 1, 1996
Summary
Olfactory receptor axons form a template for moth antennal glomeruli development. Glial cells stabilize this template, and a hormone regulates glial cell production, ensuring proper olfactory system formation.
Area of Science:
- Neuroscience
- Developmental Biology
- Insect Olfaction
Background:
- The antennal system of Manduca sexta serves as a model for olfactory glomeruli development.
- Olfactory glomeruli are key synaptic structures for initial olfactory input processing in both vertebrates and invertebrates.
Purpose of the Study:
- To summarize cellular events in Manduca sexta glomeruli construction.
- To highlight factors influencing olfactory glomeruli development through experimental manipulation.
Main Methods:
- Methodical manipulation of neuronal and glial cell types involved in glomerular architecture.
- Analysis of cellular events during glomeruli formation in Manduca sexta.
Main Results:
- Olfactory receptor axons establish a template for developing glomeruli.
- Glial cell stabilization of the axonal template is crucial for subsequent developmental steps.
- A specific hormone regulates the production of sufficient glial cells for development.
Conclusions:
- Glomeruli development relies on a sequence initiated by axonal templates and stabilized by glial cells.
- Electrical activity and serotonin-containing neurons are not essential for initial glomerular patterning but may influence synaptic organization.
- Hormonal regulation of glial cell numbers is vital for adequate olfactory system development.