Details for: CL0000907

Cell ID: CL0000907

Cell Name: central memory CD8-positive, alpha-beta T cell

Description: This cell type is compatible with the HIPC Lyoplate markers for 'central memory CD8+ T cell', but includes additional markers known to be expressed on central memory CD8+ T cells.

Synonyms: central CD8-positive, alpha-beta memory T cell, central CD8-positive, alpha-beta memory T lymphocyte, central CD8-positive, alpha-beta memory T-cell, central CD8-positive, alpha-beta memory T-lymphocyte, central memory CD8-positive, alpha-beta T lymphocyte, central memory CD8-positive, alpha-beta T-cell, central memory CD8-positive, alpha-beta T-lymphocyte, central memory CD8+ T 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 central memory CD8-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 CD8-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 CD8-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 CD8-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 CD8-positive, alpha-beta T cell (CL0000907)

 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 The [central memory CD8-positive, alpha-beta T cell](/details-cell/CL0000907) is a long-lived lymphocyte subset crucial for immunological memory. Based on its highly specific gene expression profile, this cell is characterized by a state of metabolic poise, heavily reliant on mitochondrial oxidative phosphorylation for survival and readiness. Its identity is further defined by a tightly regulated signal transduction and post-transcriptional landscape, with key markers like the anti-proliferative gene [BTG1](/details-gene/694) and the calcium signaling inhibitor [SARAF](/details-gene/51669) underscoring its quiescent yet vigilant nature, prepared for a rapid and potent recall response upon re-exposure to antigen. ## Key Characteristics and Function The gene significance profile of the [central memory CD8-positive, alpha-beta T cell](/details-cell/CL0000907), analyzed in the **Overall** context, reveals several core functional clusters that define its biological role. * **Metabolic Priming for Longevity and Recall:** A strikingly prominent feature is the high expression specificity of numerous genes involved in mitochondrial respiration. This includes multiple subunits of the cytochrome c oxidase complex ([COX1](/details-gene/4512), [COX2](/details-gene/4513), [COX4I1](/details-gene/1327), [COX7C](/details-gene/1350)) as well as other electron transport chain components like [ND3](/details-gene/4537) and [CYTB](/details-gene/4519). This strong signature of oxidative phosphorylation (OXPHOS) is consistent with the established understanding that memory T cells utilize this highly efficient metabolic pathway for long-term survival and possess a high spare respiratory capacity, enabling a rapid energetic response to secondary antigen encounter. The high specificity of iron metabolism gene [FTL](/details-gene/2512) further supports this, as iron is a critical cofactor for mitochondrial function. * **Tight Regulation of Cellular Quiescence and Signaling:** The top marker genes suggest a cell that is actively maintained in a quiescent state. [BTG1](/details-gene/694), a known anti-proliferative gene, shows high specificity, consistent with the non-proliferative nature of resting memory cells. Furthermore, the most specific marker, [SARAF](/details-gene/51669), is a negative regulator of store-operated calcium entry, a critical signaling event following T-cell receptor engagement ([Link](https://doi.org/10.1016/j.cell.2012.01.055)). Its high specificity, along with that of the calcium-binding protein [CALM1](/details-gene/801), indicates a sophisticated mechanism to tightly control calcium signaling, likely to prevent spontaneous activation and maintain the quiescent memory state while being poised for a controlled response. * **Post-Transcriptional and Translational Readiness:** A significant number of top markers are involved in RNA processing and translation. These include the RNA helicase [DDX5](/details-gene/1655), the poly(A)-binding protein [PABPC1](/details-gene/26986), and heterogeneous nuclear ribonucleoproteins [HNRNPA1](/details-gene/3178) and [HNRNPA2B1](/details-gene/3181). This suggests that [central memory CD8-positive, alpha-beta T cells](/details-cell/CL0000907) maintain a pool of pre-synthesized and stabilized mRNAs, enabling rapid translation of effector proteins upon activation, thereby bypassing the slower process of de novo transcription for an immediate recall response. * **Immune Surveillance and Interaction:** The high specificity of [HLA-E](/details-gene/3133), a non-classical MHC class I molecule, points to a key role in immune regulation. [HLA-E](/details-gene/3133) is known to interact with inhibitory receptors on [natural killer (NK) cells](/details-cell/CL0000623), suggesting that these memory T cells may actively modulate the activity of other immune cells in their microenvironment to prevent excessive inflammation or autoimmunity during their surveillance patrols. ## Clinical Significance and Contextual Roles **Overall**, [central memory CD8-positive, alpha-beta T cells](/details-cell/CL0000907) are fundamental to long-term protective immunity conferred by vaccination and natural infection. Their ability to persist for decades and mount a swift, powerful response upon pathogen re-exposure makes them a primary target for vaccine design. In chronic viral infections, such as those caused by cytomegalovirus (CMV) or Epstein-Barr virus (EBV), this cell population is crucial for maintaining control over viral replication. In the context of oncology, the persistence and recall capacity of these cells are central to the success of cancer immunotherapies, including checkpoint blockade and adoptive cell transfer (e.g., CAR-T cell therapy). A robust population of tumor-specific central memory CD8+ T cells is often correlated with durable anti-tumor responses and patient survival. The specific gene markers identified here could serve as potential targets for therapeutic modulation. For example, enhancing the metabolic fitness (e.g., via mitochondrial biogenesis pathways involving [COX1](/details-gene/4512) or [COX2](/details-gene/4513)) or promoting the maintenance of quiescence (related to [BTG1](/details-gene/694) activity) could improve the long-term efficacy of adoptively transferred T cells. The unique expression of [HLA-E](/details-gene/3133) may also have clinical implications, as its interaction with NK cell receptors could be exploited by tumors or viruses as a mechanism of immune evasion. Understanding the regulation of [HLA-E](/details-gene/3133) on these cells could unveil new avenues for therapeutic intervention. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The high expression specificity of the negative calcium signaling regulator [SARAF](/details-gene/51669) is a defining mechanism that actively preserves the quiescent state of [central memory CD8-positive, alpha-beta T cells](/details-cell/CL0000907). This prevents cellular exhaustion by setting a high threshold for activation and protecting against low-level tonic signaling from cytokines or self-antigens. * **Surprising Findings:** It is notable that a negative regulator of a key activation pathway is the most specific marker for this cell type, rather than a component of the T-cell receptor or a costimulatory molecule. This emphasizes that maintaining a stable, non-activated state is an active and highly specific process, not merely a passive default. * **Testable Questions:** Does the conditional deletion of [SARAF](/details-gene/51669) specifically in the CD8+ T cell lineage in vivo lead to a gradual decline in the central memory pool over time or a shift towards a more terminally differentiated or exhausted phenotype, particularly during a chronic viral infection model? 2. **Hypothesis:** The distinct co-expression signature of numerous mitochondrial genes (e.g., [COX1](/details-gene/4512), [COX2](/details-gene/4513), [ND3](/details-gene/4537)) and a suite of RNA-binding proteins (e.g., [DDX5](/details-gene/1655), [PABPC1](/details-gene/26986)) defines a state of "metabolic and translational poise." In this state, the cell maintains not only a high spare respiratory capacity but also a stabilized pool of critical mRNAs, allowing for an immediate burst of protein synthesis and energy production upon re-activation that is largely independent of de novo transcription. * **Surprising Findings:** While reliance on OXPHOS is known, the sheer number of mitochondrial complex components that serve as highly specific markers is unexpected, suggesting that the precise stoichiometry and regulation of the entire respiratory apparatus, not just overall capacity, is a unique feature of this cell's identity. * **Testable Questions:** Upon in vitro stimulation, do [central memory CD8-positive, alpha-beta T cells](/details-cell/CL0000907) exhibit a significantly faster increase in the translation of key effector molecules (like GZMB or IFNG) compared to naive CD8+ T cells, when measured by ribosome profiling (Ribo-Seq) within the first hours post-activation, and does this correlate with a more rapid increase in oxygen consumption rate?