Details for: CL0000904

Cell ID: CL0000904

Cell Name: central memory CD4-positive, alpha-beta T cell

Description: This cell type is compatible with the HIPC Lyoplate markers for 'central memory CD4+ T cell', but includes additional markers known to be expressed on central memory CD4+ T cells.

Synonyms: central CD4-positive, alpha-beta memory T cell, central CD4-positive, alpha-beta memory T lymphocyte, central CD4-positive, alpha-beta memory T-cell, central CD4-positive, alpha-beta memory T-lymphocyte, central memory CD4-positive, alpha-beta T lymphocyte, central memory CD4-positive, alpha-beta T-cell, central memory CD4-positive, alpha-beta T-lymphocyte, central memory CD4+ T cell

Selected Context(s): Overall

Gene Significance Landscape

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Score:
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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 central memory CD4-positive, alpha-beta 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 central memory CD4-positive, alpha-beta 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 central memory CD4-positive, alpha-beta 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 central memory CD4-positive, alpha-beta 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:  central memory CD4-positive, alpha-beta T cell (CL0000904)

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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 The [central memory CD4-positive, alpha-beta T cell](/details-cell/CL0000904) is a long-lived lymphocyte subset crucial for adaptive immunity, residing primarily in secondary lymphoid organs and poised for rapid recall responses upon antigen re-exposure. Analysis of its gene significance profile suggests its defining characteristic is a state of heightened metabolic and biosynthetic readiness. The most specific markers for this cell type are not lineage-defining surface receptors, but rather genes involved in fundamental cellular processes such as protein translation ([TPT1](/details-gene/7178), [EEF1B2](/details-gene/1933)), mitochondrial respiration ([COX7C](/details-gene/1350), [COX1](/details-gene/4512)), and antigen presentation machinery ([B2M](/details-gene/567), [HLA E](/details-gene/3133)). This signature indicates that the 'memory' state is actively maintained through a robust program of cellular upkeep, enabling these cells to swiftly execute effector functions. ## Key Characteristics and Function **Overall**, the gene expression landscape of the [central memory CD4-positive, alpha-beta T cell](/details-cell/CL0000904) is dominated by genes that support longevity and a state of "poised activation." This is reflected in several key functional clusters highlighted by genes with high expression specificity (CSI Z-scores). * **High Biosynthetic Capacity:** A prominent feature is the unique significance of genes essential for protein synthesis. This includes translation elongation factors ([EEF1B2](/details-gene/1933), [EEF1D](/details-gene/1936)) and the Translationally Controlled Tumor Protein ([TPT1](/details-gene/7178)), which is the top marker and is associated with cell growth and protection from apoptosis ([Link](https://pubmed.ncbi.nlm.nih.gov/2813067/)). Other significant genes in this cluster include the nucleolar phosphoprotein [NPM1](/details-gene/4869) and the poly(A) binding protein [PABPC1](/details-gene/26986). This suggests that these cells maintain a robust translational machinery, likely to facilitate rapid synthesis of cytokines and other effector molecules upon reactivation. * **Elevated Metabolic Activity:** The cells exhibit a strong signature for high mitochondrial activity and energy production. Multiple components of the cytochrome c oxidase complex ([COX7C](/details-gene/1350), [COX1](/details-gene/4512), [COX2](/details-gene/4513)) and ATP synthase ([ATP5F1E](/details-gene/514)), as well as cytochrome b ([CYTB](/details-gene/4519)), are among the most specific markers. This is consistent with the known reliance of long-lived memory T cells on oxidative phosphorylation for energy and survival. Furthermore, the high specificity of ferritin light and heavy chain genes ([FTL](/details-gene/2512), [FTH1](/details-gene/2495)) indicates a well-regulated iron metabolism, essential for mitochondrial function. * **Immune Regulation and Antigen Presentation:** The profile includes high specificity for components of the antigen presentation pathway, notably Beta-2-microglobulin ([B2M](/details-gene/567)) and the non-classical MHC class I molecule [HLA E](/details-gene/3133). While [B2M](/details-gene/567) is a crucial component of MHC class I molecules, its high specificity in a CD4+ T cell is notable. [HLA E](/details-gene/3133) is known to present peptides to inhibitory receptors on NK cells and a subset of CD8+ T cells ([Link](https://pubmed.ncbi.nlm.nih.gov/3260916/)). This may indicate a regulatory role for these memory cells, potentially modulating the activity of other innate and adaptive lymphocytes within lymphoid tissues. * **Transcriptional and Cellular Regulation:** The antiproliferative gene [BTG1](/details-gene/694), which is maximally expressed in the G0/G1 phases of the cell cycle ([Link](https://doi.org/10.1002/j.1460-2075.1992.tb05213.x)), shows high specificity, consistent with the quiescent but ready state of memory cells. The general transcription factor [BTF3](/details-gene/689) also appears as a key marker, suggesting a distinct transcriptional program is actively maintained. The anti-marker profile is less distinct, though the slight negative significance for genes like the NK cell lectin-like receptor [KLRB1](/details-gene/3820) may help distinguish this population from other KLRB1-expressing lymphocyte subsets. ## Clinical Significance and Contextual Roles As the provided data represents an **Overall** context, it establishes a homeostatic baseline for the [central memory CD4-positive, alpha-beta T cell](/details-cell/CL0000904). The unique gene signature of this cell type has several potential clinical implications. The profound metabolic signature points to this cell's dependence on mitochondrial health. Dysregulation of this metabolic program is a known factor in T cell exhaustion during chronic infections and cancer. Therefore, the highly specific mitochondrial genes like [COX1](/details-gene/4512) and [CYTB](/details-gene/4519) could represent potential targets for metabolic reprogramming to enhance or restore T cell memory function. Several top marker genes are implicated in disease processes. For instance, [NPM1](/details-gene/4869) is frequently mutated in acute myeloid leukemia, and its high expression here underscores its critical role in hematopoietic cell homeostasis. The antiproliferative gene [BTG1](/details-gene/694) has been directly linked to a chromosomal translocation in B-cell chronic lymphocytic leukemia ([Link](https://doi.org/10.1002/j.1460-2075.1992.tb05213.x)), suggesting that its regulatory function is critical for preventing lymphoproliferative disorders. The thioredoxin-interacting protein [TXNIP](/details-gene/10628) is a key regulator of cellular redox status, and its dysregulation is linked to inflammatory diseases and metabolic syndrome. Its high specificity in these cells suggests they are finely tuned to manage oxidative stress, a failure of which could contribute to immunosenescence or autoimmune pathology. The high specificity of [SARAF](/details-gene/51669), a negative regulator of store-operated calcium entry (SOCE) ([Link](https://doi.org/10.1016/j.cell.2012.01.055)), is also clinically relevant. Since calcium signaling is fundamental to T cell activation, SARAF may act as a crucial gatekeeper to prevent spurious activation and maintain the quiescent memory state, a mechanism that could be dysregulated in autoimmune conditions characterized by hyperactive T cells. ## Potential Mechanisms and Research Directions 1. **Hypothesis: The defining feature of central memory CD4+ T cells is a state of "biosynthetic and metabolic poise" rather than the expression of unique effector molecules.** * **Surprising Findings:** The most specific gene markers for this memory T cell are not typical immune effector or signaling molecules (e.g., specific cytokine receptors or transcription factors for Th1/Th2/Th17 lineages), but rather fundamental components of the cell's metabolic and translational machinery. Genes like [TPT1](/details-gene/7178), [EEF1D](/details-gene/1936), and multiple mitochondrial [COX](/details-gene/4512) subunits being more specific than canonical immune genes suggests that the "memory" phenotype is encoded at the level of cellular infrastructure and readiness. * **Testable Questions:** How does the proteomic landscape of quiescent [central memory CD4-positive, alpha-beta T cells](/details-cell/CL0000904) compare to naive CD4+ T cells? Specifically, are key proteins for translation ([EEF1B2](/details-gene/1933)) and mitochondrial respiration ([COX7C](/details-gene/1350)) already present at higher steady-state levels, allowing for a faster response to TCR stimulation without the need for extensive de novo transcription and translation of this core machinery? 2. **Hypothesis: Central memory CD4+ T cells play an active regulatory role in the lymphoid niche through non-classical MHC interactions.** * **Surprising Findings:** The high expression specificity of [B2M](/details-gene/567) and [HLA E](/details-gene/3133), key components of MHC class I and non-classical MHC-I pathways, is unexpected for a cell type primarily defined by its interaction with MHC class II molecules. This suggests a previously underappreciated function beyond their canonical role as helper cells. * **Testable Questions:** Does conditional knockout of [HLA E](/details-gene/3133) specifically on [central memory CD4-positive, alpha-beta T cells](/details-cell/CL0000904) alter the number, localization, or activation status of NK cells or CD8+ memory T cells within the same lymph node during homeostasis or following a secondary infection? This could be investigated using advanced in vivo imaging or co-culture systems.