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Erschienen in: Brain Structure and Function 6/2022

02.05.2022 | Short Communication

Comparative anatomical analysis of dopamine systems in Mus musculus and Peromyscus californicus

verfasst von: Justin Buck, Matthew T. C. Manion, Wenyu Zhang, Erica R. Glasper, Kuan Hong Wang

Erschienen in: Brain Structure and Function | Ausgabe 6/2022

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Abstract

Dopamine plays important roles in motivational and social behaviors in mammals, and it has been implicated in several human neurological and psychiatric disorders. Rodents are used extensively as experimental models to study dopamine function in health and disease. However, interspecies differences of dopamine systems remain incompletely characterized. Here, we assessed whether the commonly referenced anatomical organization of dopamine systems in Mus musculus differs from another rodent species, Peromyscus californicus, which exhibits unique social behaviors such as biparental care. We applied tyrosine hydroxylase immunofluorescence labeling and high-throughput microscopy to establish whole-brain maps of dopamine systems in P. californicus. By comparing these maps to those from M. musculus, we identified unexpected anatomical similarity and difference between these two species. A sex difference in dopamine neurons at the anteroventral periventricular nucleus of hypothalamus, which has been implicated in regulating the maternal behaviors of the uniparental M. musculus, is similarly present in the biparental P. californicus. In contrast, major interspecies differences from M. musculus are found in the ventral midbrain and striatum of P. californicus, including the expansion of midbrain dopamine neurons into the ventral substantia nigra and the presence of an internal capsule-like white matter tract that demarcates a dorsomedial area from the rest of the striatum. These features identified in P. californicus resemble the anatomical organization of the primate brain more closely compared to those in M. musculus. Our findings suggest that P. californicus is a unique model organism for studying the evolution of dopamine systems in mammals and the disorders of dopamine systems.
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Metadaten
Titel
Comparative anatomical analysis of dopamine systems in Mus musculus and Peromyscus californicus
verfasst von
Justin Buck
Matthew T. C. Manion
Wenyu Zhang
Erica R. Glasper
Kuan Hong Wang
Publikationsdatum
02.05.2022
Verlag
Springer Berlin Heidelberg
Erschienen in
Brain Structure and Function / Ausgabe 6/2022
Print ISSN: 1863-2653
Elektronische ISSN: 1863-2661
DOI
https://doi.org/10.1007/s00429-022-02497-8

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