PMID- 21382474 OWN - NLM STAT- MEDLINE DCOM- 20120813 LR - 20151119 IS - 1873-6300 (Electronic) IS - 0891-0618 (Linking) VI - 42 IP - 4 DP - 2011 Dec TI - Peripheral type of choline acetyltransferase: biological and evolutionary implications for novel mechanisms in cholinergic system. PG - 225-35 LID - 10.1016/j.jchemneu.2011.02.005 [doi] AB - The peripheral type of choline acetyltransferase (pChAT) is an isoform of the well-studied common type of choline acetyltransferase (cChAT), the synthesizing enzyme of acetylcholine. Since pChAT arises by exons skipping, its amino acid sequence is similar to that of cChAT, except the lack of a continuous peptide sequence encoded by all the four exons from 6 to 9. While cChAT expression has been observed in both the central and peripheral nervous systems, pChAT is preferentially expressed in the peripheral nervous system. pChAT appears to be a reliable marker for the visualization of peripheral cholinergic neurons and their processes, whereas other conventional markers including cChAT have not been used successfully for it. In mammals like rodents, pChAT immunoreactivity has been observed in most, if not all, physiologically identified peripheral cholinergic structures such as all parasympathetic postganglionic neurons and most neurons of the enteric nervous system. In addition, pChAT has been found in many peripheral neurons that are derived from the neural crest. These include sensory neurons of the trigeminal ganglion and the dorsal root ganglion, and sympathetic postganglionic neurons. Recent studies moreover indicate that pChAT, as well as cChAT, appears ubiquitously expressed among various species not only of vertebrate mammals but also of invertebrate mollusks. This finding implies that the alternative splicing mechanism to generate pChAT and cChAT has been preserved during evolution, probably for some functional benefits. CI - Copyright A(c) 2011 Elsevier B.V. All rights reserved. FAU - Bellier, J-P AU - Bellier JP AD - Molecular Neuroscience Research Center, Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu, Shiga 520-2192, Japan. bellier@belle.shiga-med.ac.jp FAU - Kimura, H AU - Kimura H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20110305 PL - Netherlands TA - J Chem Neuroanat JT - Journal of chemical neuroanatomy JID - 8902615 RN - 0 (Biomarkers) RN - EC 2.3.1.6 (Choline O-Acetyltransferase) SB - IM MH - Animals MH - Biomarkers/metabolism MH - Choline O-Acetyltransferase/*biosynthesis/chemistry/*genetics MH - Cholinergic Neurons/*enzymology/physiology MH - *Evolution, Molecular MH - Humans MH - Peripheral Nerves/enzymology/physiology MH - Synaptic Transmission/physiology EDAT- 2011/03/09 06:00 MHDA- 2012/08/14 06:00 CRDT- 2011/03/09 06:00 PHST- 2010/10/19 00:00 [received] PHST- 2011/02/23 00:00 [revised] PHST- 2011/02/24 00:00 [accepted] PHST- 2011/03/09 06:00 [entrez] PHST- 2011/03/09 06:00 [pubmed] PHST- 2012/08/14 06:00 [medline] AID - S0891-0618(11)00021-4 [pii] AID - 10.1016/j.jchemneu.2011.02.005 [doi] PST - ppublish SO - J Chem Neuroanat. 2011 Dec;42(4):225-35. doi: 10.1016/j.jchemneu.2011.02.005. Epub 2011 Mar 5.