The DOI matches its Crossref record; 55 of the 55 references it cites were found in a registry or an index.
Neonatal and Adult Neurogenesis Provide Two Distinct Populations of Newborn Neurons to the Mouse Olfactory Bulb
Open accessAbstract
In mammals, the olfactory bulb (OB) constitutes one of two regions of the postnatal brain with continuous neurogenesis throughout life. Despite intense explorations of neuronal replacement in the adult OB, little is known about the mechanisms that operate at earlier postnatal stages. This question is particularly pertinent, because the majority of local interneurons are born in the neonate, when olfaction controls vital functions. Here, we analyzed the recruitment of newborn cells to the granule cell (GC) layer (GCL) and found that the postnatal mouse OB is supplied with two spatiotemporally distinct populations of newborn interneurons. Early born [postnatal day 3 (P3) to P7] GCs constitute a threefold larger population compared with those generated later (P14-P60), and some of them are produced locally within the OB itself. Newborn interneurons generated at P3-P7 were predominantly targeted to the external edge of the GCL, whereas newly generated cells were positioned deeper in older mice. Additionally, although approximately 50% of adult newborn cells were eliminated within a few weeks of reaching the OB, almost the entire population of early born GCs survived until adulthood. Importantly, early olfactory experience specifically modifies the number of newborn GCs in neonates but leaves unaltered the amount of neurons generated during adulthood. Together, these results demonstrate that early postnatal neurogenesis endows the neonate bulbar circuit with newborn GCs that differ morphologically and functionally from those produced in the adult.
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“we argue that in our experimental conditions, most of the transduced GCs present in the adult OB originate from the early postnatal period, as this stage is concerned by a proliferation 3-fold larger than in adulthood, and producing GCs with very low cell death if any [14,20,21,55].”
From Positive early-life olfactory memory is rooted in the olfactory bulb and triggers large-scale changes beyond the olfactory system (2026) · cites this paper as [14]
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“neonatal-born GCs have been primarily associated with innate olfactory responses [14,20,21,53,54].”
From Positive early-life olfactory memory is rooted in the olfactory bulb and triggers large-scale changes beyond the olfactory system (2026) · cites this paper as [14]
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Cites
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Becoming a new neuron in the adult olfactory bulb
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A specific olfactory bulb interneuron subtype Tpbg/5T4 generated at embryonic and neonatal stages
Tsuboi, A. (2024) · Frontiers in Neural Circuits · doi:10.3389/fncir.2024.1427378 · Cited by 3
Dejou, J., Athanassi, A., Brunel, T., Thevenet, M., Didier, A., & Mandairon, N. (2026) · PLOS Biology · doi:10.1371/journal.pbio.3003845 · Cited by 1
“At the neuronal level, while adult-born GCs are well-known to support flexible olfactory behaviors in adulthood [19,50–52], neonatal-born GCs have been primarily associated with innate olfactory responses [14,20,21,53,54].”
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Metadata
- Authors
- Lemasson, M., Saghatelyan, A., Olivo-Marin, J.-C., & Lledo, P.-M.
- Affiliations
- Centre National de la Recherche Scientifique (FR)
- Venue
- The Journal of Neuroscience
- Publisher
- Society for Neuroscience
- Published
- 2005-07-20
- Volume
- 25
- Issue
- 29
- Pages
- 6816-6825
- ISSN
- 0270-6474 (ISSN-L)
- 1529-2401
- PMC
- PMC6725349
- OpenAlex
- W2031228451
- Cited by
- 218
- References
- 55
- Citations by year
- 2026: 5 · 2025: 9 · 2024: 9 · 2023: 3 · 2022: 4 · 2021: 2 · 2020: 14 · 2019: 8 · 2018: 11 · 2017: 10 · 2016: 7 · 2015: 3 · 2014: 16 · 2013: 20 · 2012: 10
- FWCI
- 4.04
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- HAL (submittedVersion)
- Topics
- Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
- Life Sciences › Neuroscience › Sensory Systems › Olfactory and Sensory Function Studies
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Keywords
- olfactory bulb, postnatal neurogenesis, adult neurogenesis, granule cells, olfactory experience, neuronal survival, cell elimination
- MeSH terms
- Age Factors, Animals, Animals, Newborn, Cell Division, Cell Movement, Interneurons, Male, Mice, Inbred C57BL, Neurons, Olfactory Bulb, Olfactory Pathways, Apoptosis, Mice
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