Details for: CL0000792

Cell ID: CL0000792

Cell Name: CD4-positive, CD25-positive, alpha-beta regulatory T cell

Description: This cell type is compatible with the HIPC Lyoplate markers for 'Treg'. The inclusion of CD127lo in the logical definition is compatible with both human and mouse T cells of this subtype.

Synonyms: CD4-positive, CD25-positive, alpha-beta regulatory T lymphocyte, CD4-positive, CD25-positive, alpha-beta regulatory T-cell, CD4-positive, CD25-positive, alpha-beta regulatory T-lymphocyte, suppressor T cell, suppressor T lymphocyte, suppressor T-cell, suppressor T-lymphocyte, Treg

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 CD4-positive, CD25-positive, alpha-beta regulatory T 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 CD4-positive, CD25-positive, alpha-beta regulatory T 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 CD4-positive, CD25-positive, alpha-beta regulatory T 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 CD4-positive, CD25-positive, alpha-beta regulatory T 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:  CD4-positive, CD25-positive, alpha-beta regulatory T cell (CL0000792)

 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.

Loading network (please wait)...

## Summary The [CD4-positive, CD25-positive, alpha-beta regulatory T cell](/details-cell/CL0000792), often abbreviated as Treg, is a specialized subpopulation of T cells that acts to suppress immune responses, thereby maintaining homeostasis and self-tolerance. The provided data, based on expression specificity (**Overall** context `csi_z` scores), reveals that beyond canonical lineage markers, this cell type is distinguished by a highly specific and robust signature of fundamental cellular processes. The top markers are dominated by genes involved in mitochondrial respiration and energy metabolism (e.g., [COX1](/details-gene/4512), [COX2](/details-gene/4513)), protein synthesis (e.g., [TPT1](/details-gene/7178)), and antigen presentation ([B2M](/details-gene/567)), suggesting that a uniquely high and stable metabolic and biosynthetic state is a core component of its identity. ## Key Characteristics and Function Analysis of the top marker genes, ranked by expression specificity, indicates that the functional identity of [CD4-positive, CD25-positive, alpha-beta regulatory T cells](/details-cell/CL0000792) is deeply intertwined with its bioenergetic and biosynthetic infrastructure. * **High Metabolic and Bioenergetic Activity:** A striking number of top markers are components of the mitochondrial electron transport chain, including [COX1](/details-gene/4512), [COX2](/details-gene/4513), [CYTB](/details-gene/4519), [COX4I1](/details-gene/1327), [COX7C](/details-gene/1350), and [ND3](/details-gene/4537). This strong enrichment suggests that a high and specific rate of oxidative phosphorylation is a defining characteristic of these cells. The high specificity of genes encoding ATP synthase subunits, such as [ATP5F1E](/details-gene/514), further supports the notion of a cell primed for sustained energy production, likely to fuel its continuous suppressive functions. Genes related to iron metabolism, [FTL](/details-gene/2512) and [FTH1](/details-gene/2495), which are critical for the function of respiratory chain complexes, also rank highly, underscoring this metabolic specialization. * **Robust Protein Synthesis and Transcriptional Control:** The high specificity of translationally controlled tumor protein ([TPT1](/details-gene/7178)) and eukaryotic translation elongation factors ([EEF1D](/details-gene/1936), [EEF1B2](/details-gene/1933)) indicates a significant and defining capacity for protein synthesis. This is consistent with a cell that must produce and potentially secrete suppressive molecules. Furthermore, the high rank of [BTG1](/details-gene/694), a known anti-proliferative gene, suggests that this high metabolic and biosynthetic state is tightly controlled and channeled towards function rather than proliferation ([Link](https://doi.org/10.1002/j.1460-2075.1992.tb05213.x)). * **Core T-Cell and Antigen Presentation Machinery:** As expected for a T lymphocyte, Beta-2-microglobulin ([B2M](/details-gene/567)) and the non-classical MHC class I molecule [HLA E](/details-gene/3133) are top markers. The exceptional specificity score of [B2M](/details-gene/567) may suggest its expression is unusually stable or high in Tregs compared to other immune populations in this dataset, highlighting its foundational role in the cell's identity and interaction with other cells. * **Defining by Absence (Anti-Markers):** The lack of significant expression for genes associated with other immune lineages helps refine the cell's functional profile. The low specificity for [GZMK](/details-gene/3003) (Granzyme K) is consistent with the non-cytotoxic role of Tregs. Similarly, the low score for [CD83](/details-gene/9308), a marker for activated dendritic cells and B cells, confirms its distinct identity. The strongly negative CSI for [GSTP1](/details-gene/2950), a glutathione S-transferase involved in detoxification, may point towards a unique redox biology or sensitivity to oxidative stress in Tregs. ## Clinical Significance and Contextual Roles **Overall**, the gene signature presented here portrays the [CD4-positive, CD25-positive, alpha-beta regulatory T cell](/details-cell/CL0000792) as a cell type whose suppressive function is underpinned by a distinct and highly active metabolic state. This has significant clinical implications. The dependence on mitochondrial respiration, highlighted by the high specificity of multiple [COX](/details-gene/4512) genes, presents a potential therapeutic vulnerability. In oncology, where Tregs suppress anti-tumor immunity, targeting this metabolic pathway could selectively inhibit Treg function or survival within the tumor microenvironment. Conversely, in autoimmune diseases, enhancing this specific metabolic profile could be a strategy to bolster Treg stability and suppressive capacity. The high specificity of the anti-proliferative gene [BTG1](/details-gene/694) is also clinically relevant. This gene's activity is crucial for maintaining T-cell quiescence. Its defining presence in Tregs suggests that their function relies on a state of active readiness without undergoing massive clonal expansion, a key feature distinguishing them from effector T cells. Dysregulation of this control mechanism could lead to Treg instability, contributing to autoimmune conditions. Additionally, the negative significance of [GSTP1](/details-gene/2950) suggests a unique handling of reactive oxygen species. This could make Tregs particularly sensitive to therapies that modulate the redox environment, offering another avenue for therapeutic intervention in either boosting or dampening their activity. ## Potential Mechanisms and Research Directions 1. **Hypothesis: The defining characteristic of a functional Treg is not solely its lineage-defining transcription factors but its specialized bioenergetic state, specifically a high and stable level of oxidative phosphorylation.** * **Surprising Findings:** The analysis did not identify canonical Treg markers like *FOXP3* or *IL2RA* (CD25) as the most specific genes. Instead, `csi_z` scores prioritized components of fundamental cellular machinery like the mitochondrial respiratory chain ([COX1](/details-gene/4512), [COX2](/details-gene/4513)) and antigen presentation ([B2M](/details-gene/567)). This implies that while lineage factors establish the cell's identity, it is the unique tuning of its core metabolic and protein synthesis engine that most specifically distinguishes it from other cell types in this dataset. * **Testable Questions:** Does pharmacologic inhibition of mitochondrial complex IV (cytochrome c oxidase) using low-dose inhibitors preferentially reduce the suppressive function of [CD4-positive, CD25-positive, alpha-beta regulatory T cells](/details-cell/CL0000792) *in vitro* and *in vivo* compared to conventional CD4+ T cells? 2. **Hypothesis: An intrinsic anti-proliferative program, marked by high expression of genes like [BTG1](/details-gene/694), is actively maintained to ensure Treg stability and prevent their conversion into effector-like cells.** * **Surprising Findings:** The prominence of an anti-proliferative gene ([BTG1](/details-gene/694)) co-existing with a signature of high metabolic activity is paradoxical. This suggests a cellular state of high potential energy that is actively restrained from driving cell division and is instead channeled into sustained suppressive function. Furthermore, the strong negative signature for [GSTP1](/details-gene/2950) is unexpected in a long-lived, metabolically active cell, suggesting a unique vulnerability or adaptation to oxidative stress that may be linked to maintaining this functional state. * **Testable Questions:** Does CRISPR-mediated knockout of [BTG1](/details-gene/694) in human [CD4-positive, CD25-positive, alpha-beta regulatory T cells](/details-cell/CL0000792) lead to hyper-proliferation upon T-cell receptor stimulation, and is this associated with a loss of suppressive function or increased expression of pro-inflammatory cytokines like IFN-gamma?