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[Histochemical localization of acetylcholinesterase in the chick ciliary ganglion during development]
Insights
Acetylcholinesterase (AChE) activity emerges early in chick ciliary ganglion development within the endoplasmic reticulum. This enzyme
Area of Science:
- Neuroscience
- Developmental Biology
- Cell Biology
Context:
- Investigating the embryonic development of the chick ciliary ganglion.
- Focusing on the early appearance and distribution of acetylcholinesterase (AChE) activity.
Purpose:
- To determine the ultrastructural localization of AChE activity during chick ciliary ganglion embryonic development.
- To correlate AChE localization with the maturation of ganglionic synapses.
Summary:
- AChE activity is first detected at the 6th day of incubation in the rough endoplasmic reticulum cisternae.
- Between days 10 and 15, AChE distribution expands to Golgi complexes, perinuclear cisterna, and plasma membrane.
- Significant AChE presence is observed at the neuronal surface near calyciform synaptic nerve endings, suggesting a role in synaptic maturation.
Impact:
- Provides insights into the spatiotemporal expression of AChE during neuronal development.
- Highlights the association of AChE with synaptic formation and functional maturation in the ciliary ganglion.
- Contributes to understanding the molecular events underlying cholinergic synapse development.
Abstract:
The ultrastructural localization of AChE activity has been investigated in the chick ciliary ganglion during embryonic development. Such activity first appears in a relatively early embryonic stage, i.e. at the 6th day of incubation, in the differentiating cisternae of the rough endoplasmic reticulum. In the period between 10 and 15 days of incubation, the reaction product progressively increases extending to other neuronal areas as Golgi complexes, the perinuclear cisterna and some rare areas of the plasma membrane. In particular a certain amount of AChE appears to occur at the neuronal surface where it is contacted by calyciform synaptic nerve endings. This is conceivably to correlate with the morpho-functional maturation of ganglionic synapses.