Details for: CL0000125

Cell ID: CL0000125

Cell Name: glial cell

Description: Not all glial cells develop from glioblasts, with microglia developing from the mesoderm instead. See https://github.com/obophenotype/cell-ontology/issues/1571

Synonyms: neuroglia, neuroglial cell

Selected Context(s): Overall

Gene Significance Landscape

Display Options
Score:
Display
Genes

Contexts:

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 glial 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 glial 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 glial 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 glial 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.
Select a context for the baseline cell.
Select a context for the target cell.
Target Cell for CSI:  glial cell (CL0000125)

 Legend
Nodes (Genes):
 Query Gene
Node size also reflects Target Cell CSI magnitude.
Node Color (Target Cell CSI in specific network):
 Very High
 High
 Medium
 Low
 Very Low
 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 A [glial cell](/details-cell/CL0000125), also known as neuroglia, represents a diverse class of non-neuronal cells in the nervous system. The provided gene significance profile suggests this specific population is deeply involved in modulating synaptic transmission and maintaining the structural and metabolic integrity of the neural microenvironment. The high specificity scores (**`csi_z`**) for genes encoding glutamate receptors, such as [GRM5](/details-gene/2915) and [GRIA4](/details-gene/2893), alongside markers for cell adhesion and cytoskeletal dynamics, paint a picture of a cell type that actively senses and responds to neuronal activity while providing essential structural and homeostatic support. ## Key Characteristics and Function **Overall**, the gene signature of this [glial cell](/details-cell/CL0000125) population points towards several core functional clusters that define its identity and primary roles. * **Synaptic Interaction and Neurotransmitter Sensing:** The most prominent characteristic is the highly specific expression of key neurotransmitter receptor genes. The high significance of both the metabotropic glutamate receptor [GRM5](/details-gene/2915) and the ionotropic AMPA receptor [GRIA4](/details-gene/2893) suggests these cells are equipped to sense and respond to synaptic glutamate release across different timescales. This is complemented by the high specificity of [ATP2B2](/details-gene/491), a plasma membrane calcium pump, indicating a crucial role in managing calcium signaling, likely initiated by neurotransmitter binding. * **Structural Scaffolding and Cell Adhesion:** A suite of top markers highlights the cell's function in maintaining tissue architecture. These include [CSMD3](/details-gene/114788), [CSMD2](/details-gene/114784), and the cadherin [CDH19](/details-gene/28513). This molecular signature is consistent with the classic role of glia in organizing neural circuits, forming boundaries, and maintaining cell-cell contacts within the nervous system. * **Cytoskeletal Dynamics and Cellular Motility:** Genes involved in the regulation of the cytoskeleton are notably specific, including [CFL1](/details-gene/1072) (cofilin), [MYL6](/details-gene/4637) (myosin light chain), and [SEPTIN12](/details-gene/124404). This suggests that these glial cells possess dynamic cellular processes, capable of extension, retraction, and morphological changes, which are essential for functions like synaptic ensheathment and injury response. * **Metabolic Support and Homeostasis:** The profile includes genes crucial for general cellular health and metabolism that are particularly specific to this cell type. High scores for the ferritin heavy and light chains, [FTH1](/details-gene/2495) and [FTL](/details-gene/2512), point to a specialized role in iron sequestration and management, a critical function for preventing oxidative stress in the iron-rich brain environment. The high specificity of [GSTP1](/details-gene/2950), a glutathione S-transferase, further reinforces a key role in detoxification and protection against reactive oxygen species. * **Immune and T-cell Interaction Potential:** The significant expression of [B2M](/details-gene/567), a component of the MHC class I molecule, is noteworthy. It suggests these cells may participate in antigen presentation or other forms of immune surveillance within the central nervous system, interacting with cytotoxic T cells under certain conditions. In contrast, the **Anti_Markers** profile is strongly enriched for genes encoding core components of the mitochondrial electron transport chain, such as [COX2](/details-gene/4513), [COX3](/details-gene/4514), [ND3](/details-gene/4537), [ND4](/details-gene/4538), and [ATP6](/details-gene/4508). This does not imply an absence of mitochondria, but rather that high-level expression of these specific respiratory proteins is not a defining characteristic of this glial population compared to other cells, possibly reflecting a distinct metabolic specialization, such as a greater reliance on glycolysis, or a role in supporting the more demanding oxidative metabolism of adjacent neurons. ## Clinical Significance and Contextual Roles The gene expression profile provides insights into the potential involvement of these [glial cells](/details-cell/CL0000125) in neurological health and disease. The prominent expression of glutamate receptors ([GRM5](/details-gene/2915) and [GRIA4](/details-gene/2893)) places these cells at the center of processes governing synaptic plasticity, learning, and memory. Dysregulation of glial glutamate handling is a known factor in excitotoxicity, a common pathological mechanism in stroke, epilepsy, and neurodegenerative disorders. Notably, one publication links [CSMD3](/details-gene/114788) to benign adult familial myoclonic epilepsy ([Link](https://doi.org/10.1016/s0006-291x(03)01555-9)), highlighting a direct connection between a top marker and neurological disease. Furthermore, the cell's apparent specialization in iron management, evidenced by [FTH1](/details-gene/2495) and [FTL](/details-gene/2512), is highly relevant to neurodegeneration. Abnormal iron accumulation is a hallmark of diseases like Parkinson's and Alzheimer's disease, where it contributes to oxidative stress and neuronal death. The high specificity of [GSTP1](/details-gene/2950) reinforces this neuroprotective role, suggesting these glial cells are primary defenders against oxidative damage in the brain. The presence of [B2M](/details-gene/567) implicates these cells in neuroinflammatory processes. In conditions such as multiple sclerosis or viral encephalitis, the ability of glia to present antigens could be a critical factor in either initiating a protective immune response or contributing to pathological inflammation and tissue damage. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** Based on the unique co-expression of ionotropic ([GRIA4](/details-gene/2893)) and metabotropic ([GRM5](/details-gene/2915)) glutamate receptors, we hypothesize that these [glial cells](/details-cell/CL0000125) act as sophisticated modulators of synaptic circuits. They may use fast [GRIA4](/details-gene/2893)-mediated signaling for immediate local responses to high synaptic traffic and slower [GRM5](/details-gene/2915)-mediated pathways to induce lasting changes in their supportive function or release of gliotransmitters, thereby providing multi-layered homeostatic control over neuronal excitability. * **Surprising Findings:** It is notable that genes for both rapid, direct-gated ion channels and slower, G-protein-coupled receptors for the same neurotransmitter are among the top specificity markers. This suggests a more complex role than simple glutamate clearance, implying these cells integrate synaptic signals over multiple timescales to fine-tune the neural environment. * **Testable Questions:** Does simultaneous pharmacological blockade of [GRIA4](/details-gene/2893) and [GRM5](/details-gene/2915) on these glial cells have a synergistic effect on neuronal firing rates or synaptic long-term potentiation in acute brain slices compared to blocking each receptor individually? 2. **Hypothesis:** The strong signature for iron management ([FTH1](/details-gene/2495), [FTL](/details-gene/2512)) and detoxification ([GSTP1](/details-gene/2950), a glutathione transferase) combined with the low specificity of core mitochondrial respiratory genes ([COX2](/details-gene/4513), [ND4](/details-gene/4538)) suggests these glial cells are specialized "neuro-custodians." We hypothesize that they prioritize a neuroprotective metabolic state, actively sequestering potentially toxic agents like iron and reactive oxygen species, possibly at the expense of their own maximal ATP production via oxidative phosphorylation, to safeguard the function of highly energy-dependent neurons. * **Surprising Findings:** The stark contrast between high specificity for managing the consequences of oxidative metabolism (iron, ROS) and low specificity for the machinery of oxidative metabolism itself is unexpected. This metabolic dichotomy points towards a selfless or altruistic cellular role, where the glial cell's metabolic profile is optimized for the protection of its neighbors rather than its own proliferation or energy production. * **Testable Questions:** Using single-cell metabolic profiling, do these glial cells exhibit a lower rate of oxygen consumption but a higher capacity for glutathione recycling compared to neighboring neurons, and does this profile change under conditions of induced oxidative stress or iron overload?