Details for: CL0000118

Cell ID: CL0000118

Cell Name: basket cell

Description: Basket cells are inhibitory GABAergic interneurons of the brain. In general, dendrites of basket cells are free branching and contain smooth spines. Axons are highly branched. The branched axonal arborizations give rise to basket-like structures that surround the soma of the target cell. Basket cells form axo-somatic synapses, meaning their synapses target somas of other cells.

Selected Context(s): Overall

Gene Significance Landscape

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Genes

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Cell Significance Index (CSI) is uniquely calculated to reveal cell-specific gene markers. More info here

Significant Genes List

Genes with the highest and lowest Percentile Rank Scores (PRS) for basket cell within the selected context(s).

Gene ID: A unique numerical identifier for this specific gene.
Symbol: Shortened abbreviation or name that represents this gene.
Ensembl Gene ID: A unique identifier assigned by Ensembl for genomic data mapping.
CSI Score: A combined effect size and statistical significance measure for basket cell. Higher scores indicate a stronger, more significant difference in expression.
(Previously described as "Fold Change", but now represents Cliff's Delta × –log10(p).)

Gene ID: A unique numerical identifier for this specific gene.
Symbol: Shortened abbreviation or name that represents this gene.
Ensembl Gene ID: A unique identifier assigned by Ensembl for genomic data mapping.
CSI Score: A combined effect size and statistical significance measure for basket cell. Higher scores indicate a stronger, more significant difference in expression.
Average CSI: csi sum / gene count
Cell network configuration

This network visualizes key genes for basket cell. It primarily includes:
1. Top genes highly significant for this cell (Num. Top Cell Genes - based on the 'Min. CSI' setting).
2. Any additional specific 'Context Genes' you add below.
The final network is a combined view. Choose an Interaction Source (pathways or protein interactions) and optionally compare CSI scores with a Baseline Cell Type.

Maximum number of selected genes.
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Select a context for the target cell.
Target Cell for CSI:  basket cell (CL0000118)

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Node size also reflects Target Cell CSI magnitude.
Node Color (Target Cell CSI in specific network):
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 N/A or Not Sig.
Edges (Interactions):
 STRING (Protein-Protein)
 ONTOLOGY (Shared Pathway)
 Colors vary by pathway category; default arrow applies.

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## Summary The [basket cell](/details-cell/CL0000118) is a GABAergic inhibitory interneuron characterized by its distinctive axonal arborizations that form 'basket-like' structures around the somas of target neurons. The gene significance profile for this cell type underscores its highly specialized role in synaptic communication and the regulation of neuronal excitability. **Overall**, its identity is strongly defined by the specific expression of genes involved in ion channel function, synaptic adhesion, and neurotransmitter signaling. The top marker, [KCNIP4](/details-gene/80333), a voltage-gated potassium channel subunit, highlights the cell's fundamental role in shaping action potentials and maintaining precise firing patterns, which is critical for its inhibitory function within neural circuits. ## Key Characteristics and Function Analysis of the top marker genes, identified by their high expression specificity (`csi_z`), reveals several core functional clusters that define the [basket cell](/details-cell/CL0000118). * **Synaptic Adhesion and Organization:** A prominent feature of the [basket cell](/details-cell/CL0000118) is the highly specific expression of a diverse array of cell adhesion molecules. These include [NRXN3](/details-gene/9369) (neurexin 3), [CADM2](/details-gene/253559), [GRID2](/details-gene/2895), [MDGA2](/details-gene/161357), [DSCAM](/details-gene/1826), and [CNTNAP5](/details-gene/129684). This molecular repertoire suggests a sophisticated mechanism for establishing and maintaining the precise axo-somatic synapses that are characteristic of this cell type. These proteins are crucial for mediating neuron-neuron recognition, synapse formation, and stabilization of the synaptic cleft. * **Ion Channel and Excitability Regulation:** The cell's identity is profoundly linked to its electrophysiological properties. The top marker, [KCNIP4](/details-gene/80333), modulates A-type potassium channels, which are critical for regulating action potential firing frequency and waveform ([Link](https://doi.org/10.1073/pnas.022509299)). Additionally, the specific expression of [HCN1](/details-gene/348980), a hyperpolarization-activated 'pacemaker' channel, and [SLC24A2](/details-gene/25769), a potassium-dependent sodium-calcium exchanger, points to a finely-tuned system for controlling membrane potential, resting state, and responsiveness to synaptic inputs. * **Neurotransmitter Signaling and Scaffolding:** [Basket cells](/details-cell/CL0000118) are defined by their role in GABAergic inhibition, and the high specificity of the GABA transporter [SLC6A1](/details-gene/6529) is consistent with this function. Concurrently, the expression of AMPA-type glutamate receptor subunits [GRIA4](/details-gene/2893) and [GRIA2](/details-gene/2891) indicates that these cells are primary targets of excitatory glutamatergic input. This input is likely integrated and modulated via signaling components like [RGS7](/details-gene/6000), a regulator of G-protein signaling, and organized at the synapse by scaffolding proteins such as [ERC2](/details-gene/26059) and [DLGAP1](/details-gene/9229). * **Anti-Markers:** The lack of specific expression for genes involved in ubiquitous cellular processes like RNA splicing ([DDX17](/details-gene/10521), [SON](/details-gene/6651)) and chromatin remodeling ([ATRX](/details-gene/546)) suggests that the [basket cell's](/details-cell/CL0000118) molecular identity is dominated by its specialized neuronal functions rather than by general housekeeping programs. The low specificity for universally expressed genes like calmodulin ([CALM1](/details-gene/801)) and the high mobility group protein [HMGB1](/details-gene/3146) further reinforces this notion of extreme specialization. ## Clinical Significance and Contextual Roles While the provided data represents an **Overall** context, the specific gene signature of [basket cells](/details-cell/CL0000118) has significant clinical implications. These cells are essential for maintaining the excitatory-inhibitory (E/I) balance in the brain, and their dysfunction is implicated in a range of neurological and psychiatric disorders. Several top marker genes are linked to human disease. For instance, neurexins like [NRXN3](/details-gene/9369) are associated with autism spectrum disorders and schizophrenia, highlighting the importance of precise synaptic connectivity. Mutations in [HCN1](/details-gene/348980) are known to cause early infantile epileptic encephalopathy, a severe seizure disorder, which directly implicates [basket cell](/details-cell/CL0000118) excitability in the pathophysiology of epilepsy. Furthermore, genes like [CSMD1](/details-gene/64478) have been identified as susceptibility loci for schizophrenia. The collective importance of these marker genes suggests that the functional integrity of [basket cells](/details-cell/CL0000118) is a critical factor in brain health, and disruptions in their core molecular machinery may be a common pathway in various neuropathologies. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The highly specific co-expression of a large suite of synaptic adhesion molecules (e.g., [NRXN3](/details-gene/9369), [CADM2](/details-gene/253559), [DSCAM](/details-gene/1826)) and distinct ion channels ([KCNIP4](/details-gene/80333), [HCN1](/details-gene/348980)) in [basket cells](/details-cell/CL0000118) suggests a tightly coupled "synaptic patterning" mechanism. In this model, the formation of specific axo-somatic connections via adhesion molecules directly recruits or stabilizes the precise complement of ion channels required to tune the cell's unique inhibitory output for that particular synapse. * **Surprising Findings:** The sheer diversity of adhesion molecules that serve as specific markers is unexpected. It implies that [basket cells](/details-cell/CL0000118) may not use a single adhesion system, but rather a combinatorial code of different adhesion proteins to recognize and form stable synapses with distinct classes of postsynaptic partners. * **Testable Questions:** Does the targeted disruption of [CADM2](/details-gene/253559) in developing [basket cells](/details-cell/CL0000118) lead to a measurable change in the membrane localization or current density of [KCNIP4](/details-gene/80333)-containing potassium channels at their presynaptic terminals? 2. **Hypothesis:** The high specificity of [RGS7](/details-gene/6000), a potent regulator of G-protein coupled receptor (GPCR) signaling, indicates that the modulatory control of [basket cells](/details-cell/CL0000118) by metabotropic signals is a uniquely defining feature of their function. This suggests that their primary role in providing fast, ionotropic GABAergic inhibition is exquisitely fine-tuned by slower, neuromodulatory inputs (e.g., dopamine, acetylcholine), with [RGS7](/details-gene/6000) acting as a critical signaling hub to shape their firing patterns over longer timescales. * **Surprising Findings:** While inhibitory interneurons are known to be modulated, the data suggests that for [basket cells](/details-cell/CL0000118), the machinery for GPCR signal termination ([RGS7](/details-gene/6000)) is as specific and defining as their core ion channels and adhesion molecules. This elevates the importance of neuromodulation from a secondary influence to a primary aspect of their cellular identity. * **Testable Questions:** Using in vitro electrophysiology, how does the pharmacological inhibition or genetic knockdown of [RGS7](/details-gene/6000) in [basket cells](/details-cell/CL0000118) alter the duration and magnitude of their response to the application of a specific GPCR agonist, and how does this consequently affect their ability to regulate network oscillations in a cortical slice preparation?