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Dynamic Changes in the Neurogenic Potential in the Ventricular-Subventricular Zone of Common Marmoset during Postnatal Brain Development.
Cerebral Cortex ( IF 3.7 ) Pub Date : 2020-02-28 , DOI: 10.1093/cercor/bhaa031
Mariyam Akter 1, 2 , Naoko Kaneko 1, 3 , Vicente Herranz-Pérez 4, 5 , Sayuri Nakamura 1 , Hisashi Oishi 6 , Jose Manuel García-Verdugo 4 , Kazunobu Sawamoto 1, 3
Affiliation  

Even after birth, neuronal production continues in the ventricular-subventricular zone (V-SVZ) and hippocampus in many mammals. The immature new neurons ("neuroblasts") migrate and then mature at their final destination. In humans, neuroblast production and migration toward the neocortex and the olfactory bulb (OB) occur actively only for a few months after birth and then sharply decline with age. However, the precise spatiotemporal profiles and fates of postnatally born neurons remain unclear due to methodological limitations. We previously found that common marmosets, small nonhuman primates, share many features of V-SVZ organization with humans. Here, using marmosets injected with thymidine analogue(s) during various postnatal periods, we demonstrated spatiotemporal changes in neurogenesis during development. V-SVZ progenitor proliferation and neuroblast migration toward the OB and neocortex sharply decreased by 4 months, most strikingly in a V-SVZ subregion from which neuroblasts migrated toward the neocortex. Postnatally born neurons matured within a few months in the OB and hippocampus but remained immature until 6 months in the neocortex. While neurogenic activity was sustained for a month after birth, the distribution and/or differentiation diversity was more restricted in 1-month-born cells than in the neonatal-born population. These findings shed light on distinctive features of postnatal neurogenesis in primates.

中文翻译:

出生后大脑发育过程中普通狨猴脑室-脑室下区神经源性电位的动态变化。

即使在出生后,许多哺乳动物的心室-室下区 (V-SVZ) 和海马中的神经元仍在继续产生。未成熟的新神经元(“神经母细胞”)迁移,然后在它们的最终目的地成熟。在人类中,神经母细胞的产生和向新皮质和嗅球 (OB) 的迁移仅在出生后几个月内活跃地发生​​,然后随着年龄的增长而急剧下降。然而,由于方法学上的限制,出生后神经元的精确时空分布和命运仍不清楚。我们之前发现普通狨猴,小型非人类灵长类动物,与人类共享 V-SVZ 组织的许多特征。在这里,我们使用在出生后不同时期注射胸苷类似物的狨猴,证明了发育过程中神经发生的时空变化。V-SVZ 祖细胞增殖和神经母细胞向 OB 和新皮层的迁移在 4 个月内急剧下降,最显着的是在 V-SVZ 亚区,神经母细胞从该亚区向新皮层迁移。出生后出生的神经元在 OB 和海马中的几个月内成熟,但在新皮质中直到 6 个月才成熟。虽然神经源性活动在出生后持续了一个月,但在 1 个月出生的细胞中的分布和/或分化多样性比在新生儿出生的群体中受到更多的限制。这些发现揭示了灵长类动物出生后神经发生的独特特征。出生后出生的神经元在 OB 和海马中的几个月内成熟,但在新皮质中直到 6 个月才成熟。虽然神经源性活动在出生后持续了一个月,但在 1 个月出生的细胞中的分布和/或分化多样性比在新生儿出生的群体中受到更多的限制。这些发现揭示了灵长类动物出生后神经发生的独特特征。出生后出生的神经元在 OB 和海马中的几个月内成熟,但在新皮质中直到 6 个月才成熟。虽然神经源性活动在出生后持续了一个月,但在 1 个月出生的细胞中的分布和/或分化多样性比在新生儿出生的群体中受到更多的限制。这些发现揭示了灵长类动物出生后神经发生的独特特征。
更新日期:2020-02-28
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