Details for: CL0002397

Cell ID: CL0002397

Cell Name: CD14-positive, CD16-positive monocyte

Description: This cell type is compatible with the HIPC Lyoplate markers for 'CD16+ monocyte'. Markers are associated with human cells. Note that this cell type encompasses both human intermediate monocytes (CD14+, CD16-low), and human non-classical monocytes (CD14-low, CD16+).

Synonyms: CD16+ 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, CD16-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, CD16-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, CD16-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, CD16-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, CD16-positive monocyte (CL0002397)

 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, CD16-positive monocyte](/details-cell/CL0002397) is a subset of circulating monocytes known to encompass both intermediate and non-classical human monocytes. The gene significance profile, based on expression specificity (**Overall**), reveals a cell with a striking and unique identity centered on the management of iron homeostasis and polyamine metabolism. The highest-ranking markers are not classical immune receptors but rather genes involved in iron storage ([FTL](/details-gene/2512) and [FTH1](/details-gene/2495)) and polyamine regulation ([SAT1](/details-gene/6303)). This suggests that beyond its established role in inflammation and patrolling, this cell type may perform a specialized metabolic and homeostatic function within the innate immune system. ## Key Characteristics and Function Analysis of top marker genes, ranked by their Z-score derived cell significance index, highlights several core functional axes for the [CD14-positive, CD16-positive monocyte](/details-cell/CL0002397). * **Iron and Polyamine Homeostasis:** The most defining characteristic of this cell is the exceptionally specific expression of genes controlling iron and polyamine metabolism. The ferritin light and heavy chain genes, [FTL](/details-gene/2512) and [FTH1](/details-gene/2495), are top markers, indicating a profound specialization in sequestering and managing intracellular iron. This is complemented by the high specificity of [SAT1](/details-gene/6303) and [OAZ1](/details-gene/4946), key regulators of polyamine levels. This combined signature suggests a role in mitigating oxidative stress and regulating cellular processes like proliferation and apoptosis, which are critical in inflammatory settings. * **Innate and Adaptive Immune Interface:** The cell expresses a robust machinery for immune recognition and antigen presentation. High specificity for [FCER1G](/details-gene/2207), the common gamma chain of Fc receptors, points to a role in responding to antibody-opsonized targets. Furthermore, the presence of markers for both MHC class I ([B2M](/details-gene/567), [HLA E](/details-gene/3133)) and MHC class II ([HLA DPA1](/details-gene/3113)) pathways establishes its capacity as a professional antigen-presenting cell. Genes such as [AIF1](/details-gene/199), an inflammatory response factor, further underscore its active role in immune surveillance and activation. * **Cytoskeletal Dynamics and Metabolic Activity:** Consistent with its known patrolling function, this monocyte exhibits specific expression of genes involved in cellular structure and motility, including [CFL1](/details-gene/1072) and [MYL6](/details-gene/4637). A suite of metabolic genes, such as [ATP5F1E](/details-gene/514) and [COX2](/details-gene/4513), are also specific markers, suggesting a high energetic demand required to fuel its immune activities. * **Defining by Absence (Anti-Markers):** The lack of specificity for certain pattern recognition and scavenger receptors, such as [TLR5](/details-gene/7100) and [MSR1](/details-gene/4481), may distinguish its primary functions from those of classical monocytes or macrophages, pointing towards a more specialized ligand recognition profile. ## Clinical Significance and Contextual Roles The unique gene expression signature of [CD14-positive, CD16-positive monocytes](/details-cell/CL0002397) implicates them in various pathological and physiological processes. The profound emphasis on iron metabolism ([FTL](/details-gene/2512), [FTH1](/details-gene/2495)) suggests a critical role in diseases characterized by iron dysregulation and inflammation, such as atherosclerosis, neurodegenerative disorders, and chronic infections. By sequestering iron, these cells could either protect tissues from iron-induced oxidative damage (ferroptosis) or contribute to inflammatory anemia by withholding iron. The high expression of [AIF1](/details-gene/199), a factor implicated in macrophage activation and allograft rejection ([Link](https://pubmed.ncbi.nlm.nih.gov/8912632/)), reinforces the cell's pro-inflammatory potential and its relevance in transplantation immunology and autoimmune diseases. The cell's capacity for antigen presentation via both MHC class I and II pathways makes it a potentially important player in orchestrating T-cell responses in these conditions. Collectively, this gene profile highlights the [CD14-positive, CD16-positive monocyte](/details-cell/CL0002397) as a highly specialized cell whose functions are deeply integrated with metabolic control, making it a potential therapeutic target or biomarker for a range of inflammatory diseases. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The dominant gene signature related to ferritin ([FTL](/details-gene/2512), [FTH1](/details-gene/2495)) and polyamine metabolism ([SAT1](/details-gene/6303)) indicates that a primary, defining function of [CD14-positive, CD16-positive monocytes](/details-cell/CL0002397) is to serve as a mobile buffer for iron and cellular stress. In inflammatory microenvironments, this capacity may be crucial for protecting tissues from oxidative damage and ferroptosis while simultaneously modulating local immune cell proliferation and survival. * **Surprising Findings:** The fact that iron and polyamine metabolic genes rank higher in expression specificity (`csi_z`) than many canonical immune signaling molecules is unexpected. This suggests these metabolic functions are not merely supportive but are central to the specialized identity and role of this monocyte subset. * **Testable Questions:** Does the functional inhibition of ferritin via chelation or siRNA knockdown in these monocytes alter their ability to suppress T-cell proliferation or protect endothelial cells from oxidative stress in a co-culture system? 2. **Hypothesis:** The specific co-expression of the Fc receptor gamma chain ([FCER1G](/details-gene/2207]) with components for both MHC class I ([B2M](/details-gene/567), [HLA E](/details-gene/3133)) and class II ([HLA DPA1](/details-gene/3113)) presentation suggests this cell is specialized in processing and cross-presenting antigens from antibody-opsonized sources to both CD4+ and CD8+ T cells. * **Surprising Findings:** The high specificity of the non-classical MHC molecule [HLA E](/details-gene/3133) is noteworthy. It suggests this cell may have a specialized role in regulating the activity of NK cells and certain T-cell subsets, which could be critical for immune tolerance or anti-tumor responses. * **Testable Questions:** Can [CD14-positive, CD16-positive monocytes](/details-cell/CL0002397) loaded with antibody-coated viral particles or tumor cells effectively stimulate both antigen-specific CD4+ helper T cells and CD8+ cytotoxic T lymphocytes in vitro, and is this activity dependent on [FCER1G](/details-gene/2207)?