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Evidence for postnatal neurogenesis in the human amygdala
Univ Erlangen Nurnberg, Dept Neurol, Erlangen, Germany..
Univ Erlangen Nurnberg, Dept Neurol, Erlangen, Germany..
Tech Univ Dresden, Ctr Regenerat Therapies CRTD, Dresden, Germany.;Max Planck Inst Phys Komplexer Syst, Dresden, Germany.;Tech Univ Dresden, Ctr Informat Serv & High Performance Comp ZIH, Dresden, Germany.;Tech Univ Dresden, DRESDEN Concept Genome Ctr, SCtr Mol & Cellular Bioengn, Dresden, Germany..
Tech Univ Dresden, Ctr Informat Serv & High Performance Comp ZIH, Dresden, Germany..
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2022 (English)In: Communications Biology, E-ISSN 2399-3642, Vol. 5, no 1, article id 366Article in journal (Refereed) Published
Abstract [en]

The human amygdala is involved in processing of memory, decision-making, and emotional responses. Previous studies suggested that the amygdala may represent a neurogenic niche in mammals. By combining two distinct methodological approaches, lipofuscin quantification and C-14-based retrospective birth dating of neurons, along with mathematical modelling, we here explored whether postnatal neurogenesis exists in the human amygdala. We investigated post-mortem samples of twelve neurologically healthy subjects. The average rate of lipofuscin-negative neurons was 3.4%, representing a substantial proportion of cells substantially younger than the individual. Mass spectrometry analysis of genomic C-14-concentrations in amygdala neurons compared with atmospheric C-14-levels provided evidence for postnatal neuronal exchange. Mathematical modelling identified a best-fitting scenario comprising of a quiescent and a renewing neuronal population with an overall renewal rate of >2.7% per year. In conclusion, we provide evidence for postnatal neurogenesis in the human amygdala with cell turnover rates comparable to the hippocampus. Lipofuscin labeling and (14) C retrospective birth-dating of neurons, along with mathematical modelling, here suggest continued postnatal neurogenesis in the human amygdala, rather than protracted maturation of developmentally generated neurons.

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Springer Nature Springer Nature, 2022. Vol. 5, no 1, article id 366
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Neurosciences
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URN: urn:nbn:se:uu:diva-474120DOI: 10.1038/s42003-022-03299-8ISI: 000784972300004PubMedID: 35440676OAI: oai:DiVA.org:uu-474120DiVA, id: diva2:1656992
Available from: 2022-05-09 Created: 2022-05-09 Last updated: 2024-01-15Bibliographically approved

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Håkansson, KarlPossnert, GöranSalehpour, MehranPrimetzhofer, Daniel

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