GABA and glutamate-like immunoreactivity in processes presynaptic to afferents from hair plates on the proximal joints of the locust leg

Watson, Alan, Storm-Mathisen, J. and Ottersen, O.P. 1991. GABA and glutamate-like immunoreactivity in processes presynaptic to afferents from hair plates on the proximal joints of the locust leg. Journal of Neurocytology 20 (10) , pp. 796-809. 10.1007/BF01191731

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Abstract

Hair plate afferents from coxal group 1 on the meso- and prothoracic legs of the locust were backfilled with cobalt salts or HRP for light and electron microscopy. The distribution of the terminal branches of the afferents is described from wholemount preparations and from 150 μm thick slices through the ganglion. Identified branches from the slices were sectioned for electron microscopy and examined for the presence of input and output synapses. Both were found in close proximity on small-diameter varicose branches in all parts of the arborization. Immunocytochemistry using antibodies against GABA and glutamate was used to try to identify putative transmitters in processes presynaptic to the afferents. Ninety-three percent of processes presynaptic to the hair plate afferents were clearly immunoreactive for GABA and only 7% appeared unlabelled. Most neuronal processes in the vicinity of afferent terminals were also immunoreactive for GABA, but a small number of glutamate-immunoreactive processes were found in intimate contact with afferents and one of these was demonstrated to be presynaptic. Processes postsynaptic to the afferents were of small diameter (mean=0.28 μm) and were not found to be immunoreactive for GABA.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Biosciences
Publisher:	Springer Verlag (Germany)
ISSN:	0300-4864
Date of First Compliant Deposit:	31 July 2018
Date of Acceptance:	1 May 1991
Last Modified:	02 May 2019 11:27
URI:	https://orca.cardiff.ac.uk/id/eprint/113761

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