Details for: CL0001054

Cell ID: CL0001054

Cell Name: CD14-positive monocyte

Description: This cell type is compatible with the HIPC Lyoplate markers for 'monocyte'. Note that while CD14 is considered a reliable marker for human monocytes, it is only expressed on approximately 85% of mouse monocytes.

Synonyms: monocyte

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 CD14-positive monocyte 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 CD14-positive monocyte. 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 CD14-positive monocyte. 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 CD14-positive monocyte. 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:  CD14-positive monocyte (CL0001054)

 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 [CD14-positive monocyte](/details-cell/CL0001054), a key component of the innate immune system, is characterized by its high expression of genes related to iron homeostasis, robust metabolic activity, and readiness for immune response. **Overall**, the gene significance profile, defined by high expression specificity (Z-Score CSI), is dominated by ferritin light and heavy chains, [FTL](/details-gene/2512) and [FTH1](/details-gene/2495) respectively, highlighting a central role in systemic iron metabolism. This is complemented by strong markers for antigen presentation ([B2M](/details-gene/567)), inflammatory signaling ([S100A6](/details-gene/6277)), and high-energy metabolism ([COX1](/details-gene/4512)), underscoring its function as a vigilant, metabolically-poised sentinel cell. ## Key Characteristics and Function Analysis of the top marker genes reveals several core functional clusters that define the [CD14-positive monocyte](/details-cell/CL0001054). * **Iron Homeostasis:** The most specific markers for this cell type are [FTL](/details-gene/2512) (CSI: 97.97) and [FTH1](/details-gene/2495) (CSI: 57.95). The high specificity of these ferritin subunits suggests that a primary and defining role of monocytes is the sequestration and management of iron. This is critical not only for systemic iron balance but also for nutritional immunity, where iron is withheld from invading pathogens. * **High Metabolic Activity and Energy Production:** A significant number of top markers are associated with mitochondrial respiration and energy generation. These include multiple subunits of the cytochrome c oxidase complex such as [COX1](/details-gene/4512), [COX2](/details-gene/4513), and [COX4I1](/details-gene/1327), as well as components of the ATP synthase complex like [ATP5F1E](/details-gene/514). This genetic signature indicates a high basal rate of oxidative phosphorylation, providing the necessary energy for their roles in phagocytosis, migration, and cytokine production. * **Innate and Adaptive Immune Interface:** The cell's function in immunity is highlighted by several key markers. High expression of [B2M](/details-gene/567), a component of MHC class I molecules, underscores its role in antigen presentation to cytotoxic [T-cells](/details-cell/CL0000084). The S100 calcium-binding protein [S100A6](/details-gene/6277) and the Allograft Inflammatory Factor 1 ([AIF1](/details-gene/199)) point to its involvement in calcium-dependent inflammatory signaling and macrophage activation. Furthermore, the presence of [FCER1G](/details-gene/2207), a signaling component for various Fc receptors, indicates its capacity to respond to antibody-opsonized targets. The immediate early gene [FOS](/details-gene/2353) suggests the cell is primed for rapid transcriptional reprogramming upon encountering inflammatory stimuli. * **Robust Cellular Machinery:** Genes such as [TPT1](/details-gene/7178) (Translationally Controlled Tumor Protein), [PABPC1](/details-gene/26986) (Poly(A) Binding Protein Cytoplasmic 1), and [CFL1](/details-gene/1072) (Cofilin 1) reflect a high capacity for protein synthesis and cytoskeletal remodeling, essential for cell motility, phagocytosis, and morphological changes during differentiation into macrophages. The anti-marker profile is also informative. The relatively low specificity for highly abundant nucleolar proteins like [NPM1](/details-gene/4869) and [NCL](/details-gene/4691) suggests that while these cells are translationally active, the machinery defining their unique identity lies more within their specialized cytoplasmic functions rather than core nuclear processes. ## Clinical Significance and Contextual Roles **Overall**, the gene expression profile of [CD14-positive monocytes](/details-cell/CL0001054) positions them at the nexus of inflammation, metabolism, and immunity, with significant clinical implications. The pronounced signature of iron metabolism genes ([FTL](/details-gene/2512), [FTH1](/details-gene/2495)) directly implicates these cells in the pathophysiology of iron-related disorders. In conditions of chronic inflammation, monocyte-derived macrophages sequester iron, leading to anemia of inflammation. Conversely, their role in iron recycling makes them relevant to iron-overload diseases like hemochromatosis. The strong expression of inflammatory mediators like [S100A6](/details-gene/6277) and [AIF1](/details-gene/199) confirms the central role of monocytes in numerous inflammatory diseases. These cells are key players in the formation of atherosclerotic plaques, joint destruction in rheumatoid arthritis, and the process of allograft rejection. The high specificity of [AIF1](/details-gene/199) particularly emphasizes their role in response to tissue injury and transplantation. As antigen-presenting cells, underscored by [B2M](/details-gene/567) expression, monocytes are crucial for initiating adaptive immune responses. Dysregulation of this function can contribute to the development of autoimmune diseases or a failure to mount effective responses to pathogens and tumors. The expression of [FOS](/details-gene/2353), a component of the AP-1 transcription factor, highlights their capacity for rapid activation, making them early responders in infection and tissue damage, where they orchestrate the subsequent immune cascade through cytokine and chemokine release. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The exceptionally high expression specificity of ferritin subunits ([FTL](/details-gene/2512) and [FTH1](/details-gene/2495)) suggests that circulating monocytes function as a primary, dynamic buffer for systemic iron, actively participating in iron homeostasis even in non-inflammatory states, rather than solely as inflammatory iron sequestrators. * **Surprising Findings:** It is notable that genes involved in iron metabolism show higher expression specificity than many canonical immune function genes. This suggests that iron handling may be a more fundamental and defining characteristic of the basal monocyte state than previously appreciated. * **Testable Questions:** How does the translational regulation of ferritin subunits in circulating monocytes respond to acute dietary iron intake versus low-grade inflammatory signals, and can the iron-loading status of these cells serve as an early biomarker for metabolic dysfunction? 2. **Hypothesis:** The constitutive high specificity of the immediate early gene [FOS](/details-gene/2353) and the calcium-binding protein [S100A6](/details-gene/6277) indicates that monocytes are maintained in a "primed" state, where calcium signaling cascades are poised to rapidly activate the AP-1 transcription factor pathway, allowing for an accelerated and potent transcriptional response to pathogenic or inflammatory triggers. * **Surprising Findings:** The identification of an immediate early gene like [FOS](/details-gene/2353) as a top marker in a general, non-stimulated context is unexpected. This may imply a high basal rate of cellular turnover or a unique mechanism of transcriptional poising that keeps the cell in a constant state of readiness. * **Testable Questions:** Does the targeted inhibition of [S100A6](/details-gene/6277) in primary human monocytes diminish the phosphorylation and nuclear import of FOS following stimulation with lipopolysaccharide (LPS), and does this lead to a significant reduction in the expression of key pro-inflammatory cytokines like TNF-alpha and IL-6?