| KDM1A | |
|---|---|
| Gene Symbol | KDM1A |
| Full Name | Lysine Specific Demethylase 1A |
| Chromosomal Location | 1p36.22 |
| NCBI Gene ID | 23028 |
| Ensembl ID | ENSG00000136867 |
| OMIM ID | 607042 |
| UniProt ID | O60341 |
| Associated Diseases | [Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease), Neurodevelopmental Disorders |
| Protein Family | LSD1 family (Flavin-dependent amine oxidase) |
KDM1A (also known as LSD1 — Lysine Specific Demethylase 1) is a crucial epigenetic regulator that catalyzes the removal of methyl groups from histone lysine residues. As a flavin-dependent amine oxidase, KDM1A plays essential roles in chromatin remodeling and gene expression regulation throughout the nervous system. [@shih2011] This enzyme is fundamental to neurodevelopment, synaptic plasticity, memory formation, and its dysregulation is strongly implicated in neurodegenerative diseases including Alzheimer's Disease (AD) and Parkinson's Disease (PD). [@bartesaghi2019]
KDM1A is unique among histone demethylases as it belongs to the flavin-dependent amine oxidase family, distinct from the larger Jumonji C (JmjC) domain-containing demethylases. The enzyme catalyzes the oxidative demethylation of:
The catalytic reaction requires flavin adenine dinucleotide (FAD) as a cofactor, which undergoes redox cycling during the demethylation process. The reaction produces formaldehyde as a byproduct. [@kooistra2012]
KDM1A functions primarily within multi-protein complexes that dictate its substrate specificity and genomic targeting:
The ability of KDM1A to activate or repress transcription depends on which protein complex it is assembled with and which histone marks it targets. [@stefanelli2018]
During embryonic development, KDM1A is essential for proper neural progenitor cell (NPC) differentiation. Loss of KDM1A function leads to:
Studies in human neural stem cells have shown that KDM1A modulates the genomic landscape and programming of neural development by regulating key developmental genes. [@tavassoly2021]
KDM1A plays a critical role in synaptic plasticity — the cellular basis of learning and memory:
Research using conditional knockout mice demonstrates that LSD1 deficiency in neurons impairs synaptic plasticity and memory formation, confirming its crucial role in cognitive function. [@michaelson2017]
KDM1A is increasingly recognized as a key player in AD pathogenesis:
Studies have shown that LSD1 deficiency promotes neuronal apoptosis and exacerbates tauopathy in AD models, while pharmacological modulation of KDM1A activity may represent a novel therapeutic approach. [@chen2023][@wang2022]
In PD, KDM1A is implicated through several mechanisms:
Intriguingly, LSD1 inhibitors have been shown to reverse alpha-synuclein-induced neurodegeneration in model systems, suggesting potential therapeutic applications. [@zhang2019]
Mutations in KDM1A or its interacting partners (particularly REST) are associated with:
REST mutations disrupt KDM1A targeting to neuronal genes, leading to improper gene expression patterns during brain development. [@kontaxi2020]
KDM1A is widely expressed throughout the brain with highest levels in:
Expression is activity-dependent, with neuronal stimulation (e.g., seizures, learning paradigms) altering KDM1A nuclear localization and activity. [@huang2019]
Several KDM1A inhibitors are in development for neurological applications:
Targeting KDM1A may benefit:
Recent studies highlight LSD1's role in modulating neuroinflammation through epigenetic regulation of microglial activation, offering another therapeutic avenue. [@yang2022][@song2021]
| Partner | Function |
|---|---|
| REST | Transcriptional repression of neuronal genes |
| CoREST | Corepressor complex formation |
| HDAC1/HDAC2 | Chromatin compaction |
| BDNF | Activity-dependent regulation |
| MEF2 | Synaptic plasticity modulation |