Details for: CL0000782

Cell ID: CL0000782

Cell Name: myeloid dendritic cell

Description: These cells are CD1a-negative, CD1b-positive, CD11a-positive, CD11c-positive, CD13-positive, CD14-negative, CD20-negative, CD21-negative, CD33-positive, CD40-negative, CD50-positive, CD54-positive, CD58-positive, CD68-negative, CD80-negative, CD83-negative, CD85j-positive, CD86-positive, CD89-negative, CD95-positive, CD120a-negative, CD120b-positive, CD123-negative, CD178-negative, CD206-negative, CD207-negative, CD209-negative, and TNF-alpha-negative. Upon TLR stimulation, they are capable of producing high levels of TNF-alpha, IL-6, CXCL8 (IL-8).

Synonyms: CD11c+CD123- DC, interdigitating cell, mDC, veiled 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 myeloid dendritic 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 myeloid dendritic 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 myeloid dendritic 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 myeloid dendritic 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:  myeloid dendritic cell (CL0000782)

 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 [myeloid dendritic cell](/details-cell/CL0000782) is a professional antigen-presenting cell (APC) characterized as a sentinel of the immune system. The provided gene significance data, based on expression specificity (**Overall** context), strongly suggests that this cell type is defined by an exceptionally high state of metabolic readiness and robust protein synthesis capacity. The most specific genetic markers are not classical immune-response genes but are instead overwhelmingly associated with mitochondrial respiration, iron homeostasis, and RNA processing. This profile is consistent with a cell that is metabolically primed to rapidly execute energy-intensive functions such as antigen processing, migration, and T-cell activation upon encountering a pathogen or inflammatory signal. Key markers of antigen presentation, such as [B2M](/details-gene/567) and [HLA-DPA1](/details-gene/3113), confirm its core immunological identity, but the foundational machinery for cellular energy and biosynthesis appears to be its most defining characteristic in a resting state. ## Key Characteristics and Function Analysis of top marker genes, ranked by expression specificity (`csi_z`), reveals several core functional clusters that define the [myeloid dendritic cell](/details-cell/CL0000782). * **Extraordinary Metabolic Activity:** A significant number of the most specific markers are components of the mitochondrial electron transport chain. These include genes encoding subunits of cytochrome c oxidase ([COX1](/details-gene/4512), [COX2](/details-gene/4513), [COX7C](/details-gene/1350)) and NADH dehydrogenase ([ND1](/details-gene/4535), [ND4](/details-gene/4538), [ND3](/details-gene/4537), [ND5](/details-gene/4540)), as well as ATP synthase ([ATP5F1E](/details-gene/514)). This indicates a massive capacity for aerobic respiration, likely to fuel the high energetic costs of antigen processing and presentation. This metabolic state is further supported by the high specificity of ferritin heavy and light chain genes, [FTH1](/details-gene/2495) and [FTL](/details-gene/2512), which are critical for managing iron, a key cofactor in oxidative phosphorylation. * **Robust Protein and RNA Processing Machinery:** The cell exhibits a strong signature for high-volume protein synthesis and post-transcriptional regulation. Top markers include the translationally controlled tumor protein [TPT1](/details-gene/7178), the poly(A)-binding protein [PABPC1](/details-gene/26986) involved in mRNA stability, and the translation elongation factor [EEF1B2](/details-gene/1933). Additionally, a suite of heterogeneous nuclear ribonucleoproteins ([HNRNPC](/details-gene/3183), [HNRNPA2B1](/details-gene/3181)) and RNA helicases ([DDX5](/details-gene/1655)) highlights the importance of mRNA splicing and processing, suggesting a sophisticated layer of gene expression control. * **Core Antigen Presentation and Cellular Maintenance:** The cell's canonical function is confirmed by the high specificity of [B2M](/details-gene/567), a component of MHC class I molecules, and [HLA-DPA1](/details-gene/3113), an MHC class II alpha chain. These are essential for presenting processed antigens to CD8+ and CD4+ T-cells, respectively. Other key genes like cofilin ([CFL1](/details-gene/1072)) point to active cytoskeletal remodeling required for cell motility and phagocytosis, while markers of the ER stress response ([HERPUD1](/details-gene/9709)) and ubiquitination pathways ([UBE2D3](/details-gene/7323)) suggest a well-developed system for protein quality control. * **Defining by Absence (Anti-Markers):** The anti-marker profile helps to refine the cell's identity. The low significance scores for markers associated with mature, activated dendritic cells, such as [LAMP3](/details-gene/27074) (DC-LAMP) and the T-cell-attracting chemokine [CCL22](/details-gene/6367), suggest the data represents cells in a predominantly immature or resting state. Furthermore, the low specificity of genes associated with other lineages, such as the T-cell marker [CD7](/details-gene/924) and the macrophage scavenger receptor [MSR1](/details-gene/4481), confirms its distinct myeloid dendritic cell lineage. ## Clinical Significance and Contextual Roles **Overall**, the gene signature of the [myeloid dendritic cell](/details-cell/CL0000782) portrays a "sentinel-in-waiting." Its profound metabolic priming suggests that a primary determinant of its immune efficacy is its ability to maintain a high state of energetic readiness. Any pathological condition that impairs mitochondrial function or iron metabolism could, therefore, compromise the capacity of these cells to initiate an adaptive immune response. The high specificity of numerous RNA-binding proteins may also have clinical implications. These proteins can act as master regulators of gene expression, and their dysregulation could be implicated in autoimmune diseases or cancer, where dendritic cell function is often aberrant. For instance, alterations in the splicing or stability of key immune transcripts could lead to either an over-active (autoimmunity) or under-active (immune evasion by tumors) cellular state. The presence of [B2M](/details-gene/567) and MHC class II genes like [HLA-DPA1](/details-gene/3113) as highly specific markers underscores their central role in adaptive immunity. Polymorphisms in HLA genes are famously linked to a wide range of autoimmune diseases, and the expression level of these molecules on dendritic cells is a critical factor in determining the strength of a T-cell response, which is relevant for vaccine efficacy and cancer immunotherapy. The profile suggests that while the cell is in a resting state, its core antigen presentation machinery is a defining and specific feature. ## Potential Mechanisms and Research Directions 1. **Hypothesis: Myeloid dendritic cells are defined by a state of "metabolic priming" where high constitutive expression of mitochondrial machinery provides the energetic foundation for rapid activation.** This state allows the cell to bypass the need for extensive metabolic reprogramming as an initial step, enabling a faster and more robust response to inflammatory cues. * **Surprising Findings:** The most specific markers for this immune cell are not canonical immune receptors or cytokines, but rather fundamental components of cellular respiration and metabolism. This suggests that metabolic state, rather than immune gene expression alone, is a primary defining feature of this cell's identity at baseline. * **Testable Questions:** How does the specific inhibition of key mitochondrial complexes (e.g., using rotenone for Complex I) in resting [myeloid dendritic cells](/details-cell/CL0000782) affect the kinetics and magnitude of their subsequent activation, as measured by upregulation of CD86, production of IL-12, and T-cell stimulatory capacity upon TLR ligation? 2. **Hypothesis: A network of highly and specifically expressed RNA-binding proteins ([PABPC1](/details-gene/26986), [HNRNPC](/details-gene/3183), [DDX5](/details-gene/1655)) functions as a post-transcriptional "gatekeeper" in resting myeloid dendritic cells.** This network may stabilize the mRNAs of critical inflammatory and immune response genes while preventing their immediate translation, creating a pool of poised transcripts that can be rapidly translated upon cell activation. * **Surprising Findings:** The data highlights general RNA processing factors as more specific markers than many lineage-defining transcription factors. This points towards post-transcriptional control as a potentially more crucial and specific regulatory layer for maintaining the sentinel state of these cells than transcriptional control. * **Testable Questions:** Does knockdown of [PABPC1](/details-gene/26986) in resting [myeloid dendritic cells](/details-cell/CL0000782) lead to a decrease in the mRNA levels of key inducible genes (e.g., *IL12B*, *CD80*)? Furthermore, can RNA-immunoprecipitation sequencing (RIP-Seq) identify which specific immune-related transcripts are bound by these RNA-binding proteins in a resting state versus an activated state?