Tae-Hyeon Cho, Miri Kim, Shin Hyung Kim, Jong Eun Lee, Se Hoon Kim, Hyun Jung Kim, Ju-Eun Hong, In-Seung Yeo, Hun-Mu Yang
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Reconsidering Neurogenetic Indication in the Human Brain: Broad Expression of Doublecortin Transcript in the Hippocampal and Cortical Cell Populations.
Introduction: Neurogenesis in the adult brain may play an important role in memory and cognition; however, knowledge of neurogenic markers in the human brain remains limited. We compared the single-nucleus transcriptome of the hippocampus with that of other cortical regions to identify hippocampus-specific neurogenic markers.
Methods: We analyzed 26,189 nuclei from four human brains collected within 16 h of death. Clustering and annotation were performed to examine differential expression, gene ontology, and intercellular communication. DCX expression was validated by ddPCR.
Results: Immature markers such as DCX, CALB2, NES, SOX2, PAX6, DPYSL3, and TUBB3 were expressed in both hippocampus and prefrontal cortex, with higher levels in the prefrontal cortex. ddPCR confirmed higher expression of DCX in the prefrontal cortex. DCX was involved in both neurogenesis and neuroprotection pathways.
Conclusion: Neurogenic markers are not definitive indicators of adult neurogenesis as their roles are more complex than previously understood.
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