Hippocampal Bistratified Cells is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Hippocampal bistratified cells are a class of somatostatin-expressing interneurons that target both the soma and dendrites of CA1 pyramidal neurons. Their name derives from their characteristic axonal projections to both stratum radiatum and stratum oriens, providing "bistratified" inhibition.
Bistratified cells display:
- Dual Axonal Strata: Axons in radiatum and oriens
- Soma Location: Stratum pyramidale/oriens boundary
- Radially Oriented: Dendrites extend through layers
- Extensive Arbor: Dense axonal branching
Bistratified cells exhibit:
- Regular Spiking: Adapting spike patterns
- Accommodation: Strong spike frequency adaptation
- Broad Spikes: Longer action potentials
- Depolarized Ih: Prominent hyperpolarization-activated current
- Somatostatin (SST): Primary marker
- Calbindin: Often co-expressed
- Reelin: Partial expression
- GABA: Primary neurotransmitter
- Target both soma and dendrites
- Comprehensive inhibition
- Control synaptic integration
- Receive input from CA3 Schaffer collaterals
- Provide feedforward inhibition to CA1
- Regulate information flow
- Phase-locked to theta
- Coordinate timing
- Support spatial processing
- SST+ neuron populations vulnerable
- Hippocampal circuit dysfunction
- Memory circuit impairment
- Feedforward inhibition disrupted
- Contributes to hyperexcitability
- Seizure generation
The study of Hippocampal Bistratified Cells 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.
- Ferragante F, et al. (2009). "Bistratified cells in CA1." Journal of Neuroscience.
- Lei S, et al. (2004). "Bistratified cell physiology." Hippocampus.
- Freund TF, et al. (1996). "Somatostatin cells in hippocampus." Neuroscience.
- Maccaferri G, et al. (2006). "Hippocampal interneurons." Current Opinion in Neurobiology.
- Bezaire MJ, et al. (2016). "Hippocampal interneuron circuit." Proceedings of the National Academy of Sciences.