NDLI: Evidence that two forms of choline acetyltransferase are differentially expressed in subclasses of enteric neurons

Content Provider	Springer Nature Link
Author	Chiocchetti, Roberto Poole, Daniel P. Kimura, Hiroshi Aimi, Yoshiri Robbins, Heather L. Castelucci, Patricia Furness, John B.
Copyright Year	2002
Abstract	Cholinergic neurons have been revealed in the enteric nervous system by functional and biochemical studies but not by antibodies that provide excellent localisation of the synthesising enzyme, choline acetyltransferase (ChAT), in the central nervous system. In order to determine whether a newly described peripheral form of ChAT (pChAT) is a ChAT enzyme of enteric neurons, we have compared pChAT distribution with that of the common form of ChAT, cChAT, by quantitative analysis of the co-localisation of pChAT and cChAT with other neurochemical markers in enteric neurons of the guinea-pig ileum. We found classes of neuron with strong pChAT immunoreactivity (IR) and others with strong cChAT-IR. In myenteric ganglia, strong pChAT-IR was in calbindin-positive intrinsic primary afferent neurons (IPANs), whereas cChAT-IR of these neurons was weak. Calretinin neurons were immunoreactive for cChAT, but not pChAT. Only 4% of nitric oxide synthase (NOS) neurons (possibly interneurons) were pChAT-immunoreactive, similar to observations with cChAT. NOS-immunoreactive inhibitory motor neurons stained with neither cChAT nor pChAT antisera. In the submucosal ganglia, pChAT-IR was strongly expressed in IPANs (identified by cytoplasmic staining for the neuronal nuclear marker, NeuN) and in neuropeptide Y (NPY)-immunoreactive secretomotor neurons, but not in calretinin-immunoreactive neurons. cChAT-IR occurred weakly in submucosal IPANs and also labelled NPY- and calretinin-immunoreactive neurons. Submucosal vasoactive-intestinal-peptide-immunoreactive neurons (non-cholinergic secretomotor neurons) were not reactive for either form of ChAT.
Starting Page	11
Ending Page	22
Page Count	12
File Format	PDF
ISSN	0302766X
Journal	Cell and Tissue Research
Volume Number	311
Issue Number	1
e-ISSN	14320878
Language	English
Publisher	Springer-Verlag
Publisher Date	2002-11-22
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Cell Biology Histology Pathology and Forensic Medicine

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