Microglia shape adult hippocampal neurogenesis through apoptosis-coupled phagocytosis.
Microglia shape adult hippocampal neurogenesis through apoptosis-coupled phagocytosis.
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DOI:
10.1016/j.stem.2010.08.014
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发表时间:
2010-10-08
期刊:
影响因子:
23.9
通讯作者:
Maletic-Savatic, Mirjana
中科院分区:
文献类型:
--
作者:
Sierra, Amanda;Encinas, Juan M.;Deudero, Juan J. P.;Chancey, Jessica H.;Enikolopov, Grigori;Overstreet-Wadiche, Linda S.;Tsirka, Stella E.;Maletic-Savatic, Mirjana
In the adult hippocampus, neuroprogenitor cells in the subgranular zone (SGZ) of the dentate gyrus give rise to newborn neuroblasts. However, only a small subset of these cells integrates into the hippocampal circuitry as mature neurons at the end of a four-week period. Here, we show that the majority of the newborn cells undergo death by apoptosis in the first one to four days of their life, during the transition from amplifying neuroprogenitors to neuroblasts. These apoptotic newborn cells are rapidly cleared out through phagocytosis by unchallenged microglia present in the adult SGZ niche. Phagocytosis by the microglia is efficient and undeterred by increased age or inflammatory challenge. Our results suggest that the main critical period of newborn cell survival occurs within a few days of birth and reveal a new role for microglia in maintaining the homeostasis of the baseline neurogenic cascade.
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发表时间:
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影响因子:
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作者:
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通讯作者:
Lindvall, O