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Co-expression of GAD67 and choline acetyltransferase in neurons in the mouse spinal cord: a focus on lamina X

Gotts, Jittima, Atkinson, Lucy, Yanagawa, Yuchio, Deuchars, Jim and Deuchars, Susan A. 2016. Co-expression of GAD67 and choline acetyltransferase in neurons in the mouse spinal cord: a focus on lamina X. Brain Research 1646 , pp. 570-579. 10.1016/j.brainres.2016.07.001

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Lamina X of the spinal cord is a functionally diverse area with roles in locomotion, autonomic control and processing of mechano and nociceptive information. It is also a neurochemically diverse region. However, the different populations of cells in lamina X remain to be fully characterised. To determine the co-localisation of the enzymes responsible for the production of GABA and acetylcholine (which play major roles in the spinal cord) in lamina X of the adult and juvenile mouse, we used a transgenic mouse expressing green fluorescent protein (GFP) in glutamate decarboxylase 67 (GAD67) neurons, combined with choline acetyltransferase (ChAT) immunohistochemistry. ChAT-immunoreactive (IR) and GAD67-GFP containing neurons were observed in lamina X of both adult and juvenile mice and in both age groups a population of cells containing both ChAT-IR and GAD67-GFP were observed in lumbar, thoracic and cervical spinal cord. Such dual labelled cells were predominantly located ventral to the central canal. Immunohistochemistry for vesicular acetylcholine transporter (VAChT) and GAD67 revealed a small number of double labelled terminals located lateral, dorsolateral and ventrolateral to the central canal. This study therefore describes in detail a population of ChAT-IR/GAD67-GFP neurons predominantly ventral to the central canal of the cervical, thoracic and lumbar spinal cord of adult and juvenile mice. These cells potentially correspond to a sub-population of the cholinergic central canal cluster cells which may play a unique role in controlling spinal cord circuitry.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Uncontrolled Keywords: Acetylcholine; GABA; Spinal cord; Interneuron; Central canal; Lamina X
Publisher: Elsevier
ISSN: 0006-8993
Funders: Wellcome Trust
Date of First Compliant Deposit: 28 August 2016
Date of Acceptance: 1 July 2016
Last Modified: 04 Jun 2017 09:22

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