Human Hippocampal Neurogenesis Persists throughout Aging.
Human Hippocampal Neurogenesis Persists throughout Aging.
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DOI:
10.1016/j.stem.2018.03.015
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发表时间:
2018-04-05
期刊:
影响因子:
23.9
通讯作者:
Mann JJ
中科院分区:
文献类型:
--
作者:
Boldrini M;Fulmore CA;Tartt AN;Simeon LR;Pavlova I;Poposka V;Rosoklija GB;Stankov A;Arango V;Dwork AJ;Hen R;Mann JJ
Adult hippocampal neurogenesis declines in aging rodents and primates. Aging humans are thought to exhibit waning neurogenesis and exercise-induced angiogenesis, with a resulting volumetric decrease in the neurogenic hippocampal dentate gyrus (DG) region, although concurrent changes in these parameters are not well studied. Here we assessed whole-autopsy hippocampi from healthy human individuals ranging from 14 to 79 years of age. We found similar numbers of intermediate neural progenitors and thousands of immature neurons in the DG, comparable numbers of glia and mature granule neurons, and equivalent DG volume across ages. Nevertheless, older individuals have less angiogenesis and neuroplasticity and a smaller quiescent progenitor pool in anterior-mid DG, with no changes in posterior DG. Thus, healthy older subjects without cognitive impairment, neuropsychiatric disease, or treatment display preserved neurogenesis. It is possible that ongoing hippocampal neurogenesis sustains human-specific cognitive function throughout life and that declines may be linked to compromised cognitive-emotional resilience. Boldrini et al. find persistent adult neurogenesis in humans into the eighth decade of life, despite declines in quiescent stem cell pools, angiogenesis, and neuroplasticity. Over a 65-year age span, proliferating neural progenitors, immature and mature granule neurons, glia, and dentate gryus volume were unchanged.
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