Cited by 308Neurogenesis and neuroplasticity mechanismsSingle-cell and spatial transcriptomicsMemory and Neural Mechanisms

Transcriptomic taxonomy and neurogenic trajectories of adult human, macaque, and pig hippocampal and entorhinal cells

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Franjic, Daniel, Skarica, Mario, Ma, Shaojie, Arellano, Jon I., Tebbenkamp, Andrew T.N., Choi, Jinmyung, Xu, Chuan, Li, Qian +19 more·2022·Neuron

Abstract

The hippocampal-entorhinal system supports cognitive functions, has lifelong neurogenic capabilities in many species, and is selectively vulnerable to Alzheimer's disease. To investigate neurogenic potential and cellular diversity, we profiled single-nucleus transcriptomes in five hippocampal-entorhinal subregions in humans, macaques, and pigs. Integrated cross-species analysis revealed robust transcriptomic and histologic signatures of neurogenesis in the adult mouse, pig, and macaque but not humans. Doublecortin (DCX), a widely accepted marker of newly generated granule cells, was detected in diverse human neurons, but it did not define immature neuron populations. To explore species differences in cellular diversity and implications for disease, we characterized subregion-specific, transcriptomically defined cell types and transitional changes from the three-layered archicortex to the six-layered neocortex. Notably, METTL7B defined subregion-specific excitatory neurons and astrocytes in primates, associated with endoplasmic reticulum and lipid droplet proteins, including Alzheimer's disease-related proteins. This resource reveals cell-type- and species-specific properties shaping hippocampal-entorhinal neurogenesis and function.

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Crossref · 10.1016/j.neuron.2021.10.036

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  • Entorhinal cortex-specific subtypes clustered separately from neocortical subtypes for the same layers and were often marked by RELN, TOX3 and GPC5, containing lateral (L2 RELN+GPC5+) and medial (L2 TOX3+POSTN+) EC subtypes.

    “EC-specific subtypes that clustered separately from neocortical subtypes for the same layers were often marked by expression of RELN, TOX3 and GPC5, and contained subtypes from both the lateral (L2 RELN+GPC5+) and medial (L2 TOX3+POSTN+) EC41–43”

    From Single-cell multiregion dissection of Alzheimer’s disease (2024) · cites this paper as [41]

    The Results (Taxonomic relationship of neural cells across allo-, meso- and neo-cortex; page unavailable) identify EC-specific excitatory-neuron subtypes, including two layer-2 RELN-expressing subtypes that did not closely correspond to neocortical subtypes. The STAR Methods (Method details; page unavailable) also classify two layer-2 EC subtypes as RELN+. Our copy does not substantiate the claimed TOX3, GPC5 or POSTN markers, the specified marker combinations, or their lateral-versus-medial EC assignments. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Some groups report absent or minimal hippocampal neurogenesis in the mature brain using double immunofluorescence and single nucleus transcriptomics.

    “Some groups have reported absent or minimal hippocampal neurogenesis in the mature brain using double immunofluorescence targeting markers expressed by neuronal cells at different maturational stages95, 96 and single nucleus transcriptomics97.”
  • Neurogenesis has limited explanatory power for depression and antidepressant effects because it occurs only in dentate gyrus and may be very limited or absent in humans.

    “The explanatory power of neurogenesis in depression and antidepressant drug effects is complicated by the fact that neurogenesis is only observed in the dentate gyrus, putting a severe limit on the possible depression symptom domains it can impact, and by recent findings that neurogenesis may be very limited or absent in humans [102].”
  • Integration of the study ATAC data with scATAC-seq data from human brain samples and the study RNA data with adult human brain snRNA-seq data showed dominant cell identities and states.

    “We also conducted integration of our ATAC data and scATAC-seq data from human brain samples42 (Fig. 5b), and our RNA data with adult human brain snRNA-seq data43, to show the dominant cell identities and states.”
  • A comprehensive molecular characterization of region-specific differences in Alzheimer's disease is currently lacking.

    “Although some brain regions relevant to AD have been studied individually at scale or jointly in samples from a few individuals8–16, a comprehensive molecular characterization of region-specific differences in AD is currently lacking”

    From Single-cell multiregion dissection of Alzheimer’s disease (2024) · cites this paper as [13]

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Authors
Franjic, D., Skarica, M., Ma, S., Arellano, J. I., Tebbenkamp, A. T. N., Choi, J., Xu, C., Li, Q., Morozov, Y. M., Andrijevic, D., Vrselja, Z., Spajic, A., Santpere, G., Li, M., Zhang, S., Liu, Y., Spurrier, J., Zhang, L., Gudelj, I., Rapan, L., Takahashi, H., Huttner, A., Fan, R., Strittmatter, S. M., Sousa, A. M. M., Rakic, P., & Sestan, N.
Affiliations
  • Yale University (US)
  • Universitat Pompeu Fabra (ES)
  • Yale Cancer Center (US)
Venue
Neuron
Publisher
Elsevier BV
Published
2022-02
Volume
110
Issue
3
Pages
452-469.e14
ISSN
0896-6273 (ISSN-L)
OpenAlex
W3212895337
Cited by
308
References
130
Citations by year
2026: 48 · 2025: 68 · 2024: 58 · 2023: 74 · 2022: 58 · 2021: 2
FWCI
17.49
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Repositori digital de la UPF (Universitat Pompeu Fabra) (submittedVersion, cc-by-nc-nd)
Funders
  • “la Caixa” Foundation (100010434)
  • Instituto de Salud Carlos III (MS20/00064)
  • European Social Fund
  • Agencia Estatal de Investigación (PID2019-104700GA-I00)
  • Fundacion La Caixa
  • National Institutes of Health (MH103339, MH106934, MH109904, MH110926)
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Single-cell and spatial transcriptomics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
adult neurogenesis, single-nucleus transcriptomics, cross-species comparison, doublecortin, METTL7B, excitatory neurons, astrocytes, lipid droplets, endoplasmic reticulum, granule cells
MeSH terms
Doublecortin Protein, Animals, Hippocampus, Humans, Macaca, Swine, Mice, Neurogenesis, Transcriptome

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