Related Experiment Videos
Proctolin-like immunoreactive neurons in the blowfly central nervous system
1Department of Zoology, University of Lund, Sweden.
The Journal of Comparative Neurology
|November 15, 1987
Summary
Proctolin-like immunoreactive neurons were mapped in the blowfly Calliphora erythrocephala, revealing diverse roles as neurotransmitters and neurohormones. This study details their distribution and potential functions in the insect nervous system.
Area of Science:
- Neuroscience
- Insect Physiology
- Immunohistochemistry
Background:
- Proctolin is a well-characterized insect neuropeptide.
- Understanding proctolin's distribution is key to its physiological roles.
Purpose of the Study:
- To map proctolin-like immunoreactive (PLI) neurons in the blowfly Calliphora erythrocephala nervous system.
- To investigate the potential functions of proctolin in the insect nervous system.
Main Methods:
- Immunohistochemistry using an antiserum against proctolin.
- Mapping PLI neurons in the brain, optic lobe, thoracic, and abdominal ganglia.
- Electron microscopy to examine PLI neuron terminals.
Main Results:
- 80-90 PLI neurons identified in the brain, 200-250 in the optic lobe, 100-130 in thoracic ganglia, and ~60 in abdominal ganglia.
- PLI neurons include interneurons, efferents, and neurosecretory cells.
- Identified PLI neurons innervate specific neuropils and some project to neurohaemal regions outside the blood-brain barrier.
Conclusions:
- Proctolin acts as a central transmitter/modulator, neuromuscular transmitter, and neurohormone in Calliphora.
- PLI neurons exhibit diverse morphologies and projections, suggesting multifaceted roles.
- Proctolin release outside the blood-brain barrier indicates neurohormonal function.