Genetically identified neurons in avian auditory pallium mirror core principles of their mammalian counterparts
| Autor: | Yoko Yazaki-Sugiyama, Jeremy A. Spool, Yuichi Morohashi, Luke Remage-Healey, Matheus Macedo-Lima, Garrett B. Scarpa |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Telencephalon Cell type Interneuron Inhibitory postsynaptic potential General Biochemistry Genetics and Molecular Biology GAD1 Songbirds 03 medical and health sciences 0302 clinical medicine medicine Animals Zebra finch Mammals Neurons biology biology.organism_classification Phenotype Songbird 030104 developmental biology medicine.anatomical_structure Vertebrates Nidopallium General Agricultural and Biological Sciences Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Current biology : CB. 31(13) |
| ISSN: | 1879-0445 |
| Popis: | In vertebrates, advanced cognitive abilities are typically associated with the telencephalic pallium. In mammals, the pallium is a layered mixture of excitatory and inhibitory neuronal populations with distinct molecular, physiological, and network phenotypes. This cortical architecture is proposed to support efficient, high-level information processing. Comparative perspectives across vertebrates provide a lens to understand the common features of pallium that are important for advanced cognition. Studies in songbirds have established strikingly parallel features of neuronal types between mammalian and avian pallium. However, lack of genetic access to defined pallial cell types in non-mammalian vertebrates has hindered progress in resolving connections between molecular and physiological phenotypes. A definitive mapping of the physiology of pallial cells onto their molecular identities in birds is critical for understanding how synaptic and computational properties depend on underlying molecular phenotypes. Using viral tools to target excitatory versus inhibitory neurons in the zebra finch auditory association pallium (calmodulin-dependent kinase alpha [CaMKIIα] and glutamate decarboxylase 1 [GAD1] promoters, respectively), we systematically tested predictions derived from mammalian pallium. We identified two genetically distinct neuronal populations that exhibit profound physiological and computational similarities with mammalian excitatory and inhibitory pallial cells, definitively aligning putative cell types in avian caudal nidopallium with these molecular identities. Specifically, genetically identified CaMKIIα and GAD1 cell types in avian auditory association pallium exhibit distinct intrinsic physiological parameters, distinct auditory coding principles, and inhibitory-dependent pallial synchrony, gamma oscillations, and local suppression. The retention, or convergence, of these molecular and physiological features in both birds and mammals clarifies the characteristics of pallial circuits for advanced cognitive abilities. |
| Databáze: | OpenAIRE |
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