Parvalbumin (PV) interneurons are a major subclass of GABAergic inhibitory neurons in the cerebral cortex and hippocampus. These fast-spiking neurons play crucial roles in regulating cortical network oscillations, particularly gamma oscillations (30-80 Hz), which are essential for cognitive processes including attention, working memory, and sensory integration [1][2]. PV interneuron dysfunction has been strongly implicated in the pathophysiology of schizophrenia, where gamma oscillation deficits are a hallmark finding [3].
PV interneurons are characterized by their expression of the calcium-binding protein parvalbumin, which enables rapid calcium buffering and supports high-frequency firing rates. These neurons typically possess:
PV interneurons are concentrated in:
PV interneurons are fundamental to gamma oscillation generation through several mechanisms:
In some contexts, PV interneurons can generate gamma oscillations independently through:
Multiple studies have documented reduced gamma power and synchronization in schizophrenia patients:
Post-mortem studies have identified several PV-related abnormalities in schizophrenia:
The neurodevelopmental hypothesis of schizophrenia proposes that PV interneuron dysfunction begins during adolescence:
PV interneuron abnormalities have been reported in Alzheimer's disease:
PV interneurons in the basal ganglia are affected in Parkinson's disease:
PV interneuron dysfunction is implicated in:
Several drug classes target PV interneuron function:
Cardin et al. Driving fast-spiking neurons induces gamma oscillations (2009). 2009. ↩︎
Sohal et al. Parvalbumin neurons and gamma rhythms enhance cortical circuit performance (2009). 2009. ↩︎
Lewis et al. Circuit-based framework for understanding neurotransmitter and risk gene effects in schizophrenia (2018). 2018. ↩︎
Kwon et al. Gamma frequency-range abnormalities to auditory stimulation in schizophrenia (1999). 1999. ↩︎
Cho et al. Alterations of gamma frequency and working memory in schizophrenia (2006). 2006. ↩︎
Barr et al. Gamma EEG abnormalities in schizophrenia (2010). 2010. ↩︎
Woo et al. Parvalbumin deficiency in prefrontal cortex in schizophrenia (2008). 2008. ↩︎
Curley et al. Cortical GABA deficits in schizophrenia (2011). 2011. ↩︎
Rocco et al. Morphological alterations in PV interneurons in schizophrenia (2016). 2016. ↩︎
Kim et al. Oxidative stress and PV interneuron dysfunction in schizophrenia (2010). 2010. ↩︎
Palop et al. Aberrant excitatory network activity in AD (2013). 2013. ↩︎
Kobayashi et al. Tau accumulation in PV neurons in AD (2020). 2020. ↩︎
Mably et al. Gamma oscillations predict cognitive decline in AD (2017). 2017. ↩︎
Iaccarino et al. Gamma frequency entrainment for AD therapy (2016). 2016. ↩︎
Mallet et al. Striatal PV interneuron firing in PD models (2008). 2008. ↩︎
McCarthy et al. Beta oscillations and PV interneurons in PD (2011). 2011. ↩︎
Trevillya et al. Dopamine modulation of PV neurons in basal ganglia (2020). 2020. ↩︎
Oren et al. Gamma oscillations in bipolar disorder (2010). 2010. ↩︎
Gogolla et al. Circuit integrity and PV dysfunction in autism models (2009). 2009. ↩︎
Treves et al. PV neurons and epilepsy (2020). 2020. ↩︎
Hoy et al. TMS and gamma oscillations in schizophrenia (2019). 2019. ↩︎
Suh et al. Optogenetic PV activation improves cognition (2013). 2013. ↩︎
Donato et al. Environmental enrichment restores PV function (2013). 2013. ↩︎