期刊
JOURNAL OF NEUROSCIENCE
卷 41, 期 19, 页码 4172-4186出版社
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.2539-20.2021
关键词
cognition; glia; learning and memory; neurogenesis; neuroinflammation; repopulating microglia
资金
- Sylvia and Charles Viertel Foundation
- Australian Research Council [150101578]
- National Health and Medical Research Council (NHMRC) [1124503]
- Australian government Research Training Scholarship
- Queensland Brain Institute Student TopUp Scholarship
- UQ Career Development Scholarship Extension
- University of Queensland Senate Scholarship Herdsman Fellowship in Medical Science
- SpinalCure Australia
- Wings for Life Spinal Cord Research Foundation
- NHMRC [1060538, 1163835]
- Australian Government through ARC (Australian Research Council) LIEF (Linkage Infrastructure, Equipment and Facilities) [LE100100074]
- National Health and Medical Research Council of Australia [1060538, 1124503, 1163835] Funding Source: NHMRC
Selective removal of BDNF from microglia increases production of newborn neurons and interferes with self-renewal, reducing overall density. Microglial BDNF is identified as an important factor regulating microglial population dynamics and states, influencing neurogenesis under both homeostatic and pathologic conditions.
Microglia, the resident immune cells of the CNS, have emerged as key regulators of neural precursor cell activity in the adult brain. However, the microglia-derived factors that mediate these effects remain largely unknown. In the present study, we investigated a role for microglial brain-derived neurotrophic factor (BDNF), a neurotrophic factor with well known effects on neuronal survival and plasticity. Surprisingly, we found that selective genetic ablation of BDNF from microglia increased the production of newborn neurons under both physiological and inflammatory conditions (e.g., LPS-induced infection and traumatic brain injury). Genetic ablation of BDNF from microglia otherwise also interfered with self-renewal/proliferation, reducing their overall density. In conclusion, we identify microglial BDNF as an important factor regulating microglia population dynamics and states, which in turn influences neurogenesis under both homeostatic and pathologic conditions.
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