Nuclear organization of some immunohistochemically identifiable neural systems in two species of the Euarchontoglires: A Lagomorph, Lepus capensis, and a Scandentia, Tupaia belangeri

Calvey, Tanya, Alagaili, Abdulaziz N., Bertelsen, Mads F., Bhagwandin, Adhil, Pettigrew, John D. and Manger, Paul R. (2015) Nuclear organization of some immunohistochemically identifiable neural systems in two species of the Euarchontoglires: A Lagomorph, Lepus capensis, and a Scandentia, Tupaia belangeri. Journal of Chemical Neuroanatomy, 70 1-19. doi:10.1016/j.jchemneu.2015.10.007

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Author Calvey, Tanya
Alagaili, Abdulaziz N.
Bertelsen, Mads F.
Bhagwandin, Adhil
Pettigrew, John D.
Manger, Paul R.
Title Nuclear organization of some immunohistochemically identifiable neural systems in two species of the Euarchontoglires: A Lagomorph, Lepus capensis, and a Scandentia, Tupaia belangeri
Journal name Journal of Chemical Neuroanatomy   Check publisher's open access policy
ISSN 0891-0618
1873-6300
Publication date 2015-12
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jchemneu.2015.10.007
Open Access Status Not yet assessed
Volume 70
Start page 1
End page 19
Total pages 19
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2016
Language eng
Formatted abstract
The present study describes the organization of the nuclei of the cholinergic, catecholaminergic, serotonergic and orexinergic systems in the brains of two members of Euarchontoglires, Lepus capensis and Tupaia belangeri. The aim of the present study was to investigate the nuclear complement of these neural systems in comparison to previous studies on Euarchontoglires and generally with other mammalian species. Brains were coronally sectioned and immunohistochemically stained with antibodies against choline acetyltransferase, tyrosine hydroxylase, serotonin and orexin-A. The majority of nuclei revealed in the current study were similar between the species investigated and to mammals generally, but certain differences in the nuclear complement highlight potential phylogenetic interrelationships within the Euarchontoglires and across mammals. In the northern tree shrew the nucleus of the trapezoid body contained neurons immunoreactive to the choline acetyltransferase antibody with some of these neurons extending into the lamellae within the superior olivary nuclear complex (SON). The cholinergic nature of the neurons of this nucleus, and the extension of cholinergic neurons into the SON, has not been noted in any mammal studied to date. In addition, cholinergic neurons forming the medullary tegmental field were also present in the northern tree shrew. Regarding the catecholaminergic system, the cape hare presented with the rodent specific rostral dorsal midline medullary nucleus (C3), and the northern tree shrew lacked both the ventral and dorsal divisions of the anterior hypothalamic group (A15v and A15d). Both species were lacking the primate/megachiropteran specific compact portion of the locus coeruleus complex (A6c). The nuclei of the serotonergic and orexinergic systems of both species were similar to those seen across most Eutherian mammals. Our results lend support to the monophyly of the Glires, and more broadly suggest that the megachiropterans are more closely related to the primates than are any other members of Euarchontoglires studied to date.
Keyword Choline acetyltransferase
Tyrosine hydroxylase
Serotonin
Orexin
Evolution
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
Official 2016 Collection
 
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