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Nerve growth factor (NGF) receptor expression in chicken cranial development.
The Journal of Comparative Neurology
|February 8, 1987
Summary
Nerve growth factor (NGF) receptors are expressed in developing chicken brains and cranial ganglia. Autoradiography revealed NGF receptor presence in various neural tissues and some non-neural tissues, suggesting diverse roles in development.
Area of Science:
- Developmental Biology
- Neuroscience
- Molecular Biology
Background:
- Nerve growth factor (NGF) is crucial for neuronal survival and differentiation.
- Understanding NGF receptor expression patterns is key to elucidating its developmental roles.
Purpose of the Study:
- To map the expression of NGF receptors during chicken brain and cranial ganglia development.
- To investigate the distribution and temporal patterns of NGF receptor binding.
Main Methods:
- Autoradiographical analysis using iodinated NGF (125I beta NGF) as a probe.
- Analysis conducted on chicken embryos from embryonic day 3 (E3) to posthatching day 3 (P3).
Main Results:
- Heavy labeling observed in classical NGF target sites like cranial sensory ganglia and superior cervical ganglion.
- Transient weak labeling detected in vestibulocochlear and distal cranial sensory ganglia.
- Specific NGF receptor binding identified in various brain regions, including brainstem nuclei, cerebellum, tectum, and basal forebrain.
- Labeling also found in non-nervous tissues such as otic vesicle epithelium and head skeletal muscle anlagen.
Conclusions:
- NGF receptors are expressed in diverse cranial cell types of neural tube, neural crest, placode, and possibly mesodermal origin.
- These findings support a multifaceted role for NGF in the growth and differentiation of various embryonic tissues.