Hippocampal Neurogenesis In Neurodegeneration is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Adult hippocampal neurogenesis is the process of generating new neurons in the hippocampus, particularly in the dentate gyrus. This process continues throughout life and is essential for memory formation, pattern separation, and cognitive flexibility. In neurodegenerative diseases, hippocampal neurogenesis is significantly impaired, contributing to cognitive deficits.
| Factor | Mechanism | Effect |
|---|---|---|
| BDNF | TrkB/PI3K/Akt/CREB | Survival, differentiation |
| Notch | RBPJ/HES signaling | Stem cell maintenance |
| Wnt/β-catenin | TCF/LEF transcription | Proliferation, fate |
| IGF-1 | PI3K/Akt signaling | Proliferation |
| VEGF | VEGFR2 signaling | Angiogenesis, neurogenesis |
| Factor | Mechanism | Effect |
|---|---|---|
| Amyloid-β | Oxidative stress, inflammation | Reduced proliferation |
| Tau pathology | Synaptic dysfunction | Impaired integration |
| Neuroinflammation | Cytokine release | Reduced neurogenesis |
| Aging | Senescence, reduced factors | Declining neurogenesis |
| Glucocorticoids | HPA axis activation | Inhibits proliferation |
In Alzheimer's disease, hippocampal neurogenesis is severely compromised:
While PD is primarily known for dopaminergic neuron loss, hippocampal neurogenesis is also affected:
Huntington's disease shows dramatic impairment of neurogenesis:
| Approach | Example | Status |
|---|---|---|
| BDNF enhancers | 7,8-DHF | Preclinical |
| Notch inhibitors | γ-secretase modulators | Research |
| Wnt modulators | Small molecules | Research |
| Anti-inflammatory | Minocycline | Clinical trials |
| Exercise mimetics | Pharmacological | Research |
The study of Hippocampal Neurogenesis In Neurodegeneration has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Gage FH. Mammalian neural stem cells. Science. 2000;287(5457):1433-1438. DOI:10.1126/science.287.5457.1433
Eriksson PS, Perfilieva E, Bjork-Eriksson T, et al. Neurogenesis in the adult human hippocampus. Nat Med. 1998;4(11):1313-1317. DOI:10.1038/3305
Kempermann G, Gage FH. New nerve cells for the adult brain. Sci Am. 1999;280(5):48-53. PMID:10216842
Winner B, Winkler J. Adult neurogenesis in neurodegenerative diseases. Cold Spring Harb Perspect Biol. 2015;7(4):a021287. DOI:10.1101/cshperspect.a021287
Sorrells SF, Paredes MF, Zhang Z, et al. Human hippocampal neurogenesis drops sharply in children to undetectable levels in adults. Nature. 2018;555(7696):377-381. DOI:10.1038/nature25975
Encinas JM, Michurina TV, Peunova N, et al. Division-coupled astrocytic differentiation and age-related depletion of neural stem cells in the adult hippocampus. Cell Stem Cell. 2011;8(5):566-579. DOI:10.1016/j.stem.2011.03.010
Toda T, Gage FH. Review: Adult neurogenesis contributes to hippocampal plasticity. Cell Tissue Res. 2018;373(3):693-709. DOI:10.1007/s00441-017-2735-4
Liu Y, Niu L, Zhu X, et al. Adult neurogenesis in Alzheimer's disease. Acta Neurobiol Exp (Wars). 2020;80(3):258-269. PMID:33006780
Migaud M, Bateson P, Gage FH. Neural stem cells and neurodegenerative diseases. Curr Opin Neurol. 2016;29(4):419-424. DOI:10.1097/WCO.0000000000000351
Zhao C, Deng W, Gage FH. Mechanisms and functional implications of adult neurogenesis. Cell. 2008;132(4):645-660. DOI:10.1016/j.cell.2008.01.033
🔴 Low Confidence
| Dimension | Score |
|---|---|
| Supporting Studies | 10 references |
| Replication | 0% |
| Effect Sizes | 25% |
| Contradicting Evidence | 0% |
| Mechanistic Completeness | 75% |
Overall Confidence: 39%