| Cortical Interneurons | |
|---|---|
| Lineage | Neuron > GABAergic > Cortical Interneuron |
| Markers | GAD1, GAD2, SLC6A13, RELN, CALB2, PVALB, SST, VIP |
| Brain Regions | Cerebral cortex, Hippocampus |
| Disease Vulnerability | [Alzheimer's Disease](/diseases/alzheimers-disease), [Epilepsy](/diseases/epilepsy), [Frontotemporal Dementia](/diseases/ftd) |
Cortical Interneurons is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Cortical Interneurons are GABAergic inhibitory neurons that constitute approximately 20-30% of the cortical neuronal population.[1] These cells play crucial roles in regulating cortical circuit activity, maintaining the balance between excitation and inhibition, and supporting cognitive functions including learning, memory, and attention.[2]
Cortical interneurons are diverse, with distinct subtypes classified by their morphology, neurochemical markers, and electrophysiological properties. The major subtypes include parvalbumin (PV+), somatostatin (SST+), and vasoactive intestinal peptide (VIP+) interneurons.[3]
Cortical interneurons are identified by expression of:
These markers are used for classification in single-cell RNA sequencing studies and immunohistochemical identification.[4]
Cortical interneurons perform essential functions in cortical circuits:
Cortical interneurons show vulnerability in AD:
Interneurons are critically involved in epilepsy pathophysiology:
The study of Cortical Interneurons 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.
Markram H, et al. Interneurons of the neocortical inhibitory system. Nat Rev Neurosci. 2004. ↩︎
Freeman WJ. Cortical interneurons: beyond the locking hypothesis. Brain Res. 2015. ↩︎
DeFelipe J, et al. Cortical interneurons: from Cajal to neuron class. Brain Struct Funct. 2013. ↩︎
Tasic B, et al. Shared and distinct transcriptomic cell types across neocortical areas. Nature. 2018. ↩︎
Garcia-Marin V, et al. Diminished perisomatic GABAergic inputs on pyramidal neurons in the olfactory bulb of 3xTg-AD mice. Front Neuroanat. 2017. ↩︎
Palop JJ, et al. Aberrant excitatory neuronal activity and compensatory remodeling of inhibitory hippocampal circuits in mouse models of Alzheimer's disease. Neuron. 2007. ↩︎
Busche MA, et al. Clusters of hyperactive neurons near amyloid plaques in a mouse model of Alzheimer's disease. Science. 2008. ↩︎
Romero-Molina C, et al. Distinct GABAergic dysfunction in cellular and network models of AD. Cell Mol Neurobiol. 2023. ↩︎
Treves IA, et al. Parvalbumin interneuron loss contributes to impaired neurogenesis in temporal lobe epilepsy. Ann Neurol. 2021. ↩︎
Shiri M, et al. Targeting interneurons: a promising therapeutic strategy for Alzheimer's disease. J Mol Neurosci. 2022. ↩︎