Details for: CL4006000

Cell ID: CL4006000

Cell Name: fibroblast of breast

Description: A fibroblast that is part of the breast.

Synonyms: breast fibroblast

Selected Context(s): Overall

Gene Significance Landscape

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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 fibroblast of breast 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 fibroblast of breast. 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 fibroblast of breast. 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 fibroblast of breast. 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:  fibroblast of breast (CL4006000)

 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 [fibroblast of breast](/details-cell/CL4006000) is a mesenchymal cell type integral to the stromal component of the breast. Based on its gene significance profile, this cell is characterized by an exceptionally specific expression of genes involved in mitochondrial function and aerobic respiration. This suggests a primary role as a highly metabolically active cell, potentially providing bioenergetic and structural support to the surrounding breast epithelium. The high specificity scores (`csi_z`) for numerous components of the electron transport chain indicate that this metabolic state is a uniquely defining feature of this fibroblast subtype compared to other cells. ## Key Characteristics and Function **Overall**, the gene signature of the [fibroblast of breast](/details-cell/CL4006000) points towards a cell with a high capacity for energy production, protein synthesis, and cellular regulation. * **Dominant Mitochondrial and Metabolic Signature:** A defining characteristic is the high specificity of multiple mitochondrial-encoded genes. This includes key subunits of the electron transport chain such as [COX1](/details-gene/4512) (CSI: 23.27), [ND4](/details-gene/4538) (CSI: 22.37), [COX2](/details-gene/4513) (CSI: 22.15), [ATP6](/details-gene/4508) (CSI: 20.13), [ND1](/details-gene/4535) (CSI: 18.42), and [ND3](/details-gene/4537) (CSI: 15.44). This robust signature of aerobic respiration pathway components suggests a state of high oxidative phosphorylation, positioning these cells as major ATP producers within the breast tissue microenvironment. * **Active Protein Synthesis and Processing:** The profile is enriched with genes essential for protein synthesis and turnover. High specificity for [UBC](/details-gene/7316) (CSI: 21.29), which encodes polyubiquitin, points to active protein degradation and cellular quality control. Concurrently, high specificity for translation elongation factors like [EEF1B2](/details-gene/1933) and [EEF1D](/details-gene/1936), along with [SRP14](/details-gene/6727) (part of the signal recognition particle for protein targeting), indicates a high rate of protein production. This is further supported by the high ranking of [PABPC1](/details-gene/26986), a key poly(A)-binding protein involved in mRNA stability and translation initiation. * **Regulatory and Signaling Roles:** Beyond metabolic and biosynthetic functions, these fibroblasts express specific genes involved in cellular regulation. [S100A6](/details-gene/6277) (CSI: 22.41), a calcium-binding protein, suggests a role in calcium-dependent signaling pathways. The high specificity of [ZFP36](/details-gene/7538) (CSI: 19.87), a key regulator that promotes the degradation of AU-rich element-containing mRNAs (often encoding cytokines and proto-oncogenes), implies that these cells actively control inflammatory and growth factor signaling at a post-transcriptional level. The lncRNA [NEAT1](/details-gene/283131), a core component of nuclear paraspeckles, also shows high specificity, indicating a distinct level of nuclear organization and gene regulation. * **Non-Defining Functional Aspects:** Interestingly, many canonical fibroblast-associated genes involved in extracellular matrix (ECM) organization and signaling have low specificity scores in this analysis. Genes such as [MFAP4](/details-gene/4239), [TGFBI](/details-gene/7045), [ECM2](/details-gene/1842), and [COL11A1](/details-gene/1301) are found among the anti-markers. This does not imply that breast fibroblasts do not perform these functions, but rather suggests that their roles in ECM remodeling are not as unique or defining as their metabolic profile when compared against a diverse set of other cell types. Similarly, the low specificity of signaling molecules like [NOTCH3](/details-gene/4854) and [IL6](/details-gene/3569) suggests these pathways are not uniquely active in defining the identity of this cell type under baseline conditions. ## Clinical Significance and Contextual Roles **Overall**, while the provided data does not distinguish between health and disease states, the prominent metabolic signature of breast fibroblasts has significant clinical implications. In a healthy breast, the high energetic output of these cells is likely crucial for supporting the maintenance and function of the adjacent hormone-responsive epithelial and myoepithelial cells. In the context of breast cancer, the metabolic phenotype of cancer-associated fibroblasts (CAFs) is an area of intense research. The intrinsic high metabolic activity observed here could be co-opted or reprogrammed during tumorigenesis. These fibroblasts could potentially fuel tumor growth through metabolic coupling, a process where fibroblasts provide energy-rich metabolites like lactate to cancer cells. The specific expression of regulatory molecules like [ZFP36](/details-gene/7538) is also clinically relevant, as its function in dampening inflammatory mRNA expression could be a key factor in modulating the tumor immune microenvironment, potentially contributing to an immunosuppressive or pro-tumorigenic state. Furthermore, the high specificity of [NPM1](/details-gene/4869), a gene frequently mutated in myeloid neoplasms, suggests that its function in ribosome biogenesis and stress response is a key feature of these cells, which could be relevant in pathological contexts. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The highly specific mitochondrial gene signature of [fibroblast of breast](/details-cell/CL4006000) reflects a specialized role in metabolically supporting adjacent breast epithelial cells through a symbiotic relationship, where fibroblasts provide key energy substrates. * **Surprising Findings:** It is unexpected that ubiquitously expressed mitochondrial genes would serve as highly specific markers ([csi_z]). This finding implies that the *level and regulation* of oxidative phosphorylation in breast fibroblasts are quantitatively distinct and a core component of their specialized identity, rather than just a housekeeping function. * **Testable Questions:** Can in vitro co-culture experiments demonstrate a transfer of metabolites (e.g., lactate, pyruvate, ketone bodies) from [fibroblast of breast](/details-cell/CL4006000) to breast epithelial cells? Does inhibition of mitochondrial respiration in these fibroblasts impair the proliferation or function of co-cultured epithelial cells? 2. **Hypothesis:** The high specificity of the RNA-binding protein [ZFP36](/details-gene/7538) indicates that [fibroblast of breast](/details-cell/CL4006000) function as key post-transcriptional regulators that actively shape the inflammatory and growth factor milieu of the breast stroma by promoting the decay of specific mRNAs. * **Surprising Findings:** The prominence of an mRNA decay factor as a top cell type marker suggests that the identity and function of these fibroblasts are defined as much by their post-transcriptional regulatory state as by their transcriptional profile. This points to a highly dynamic role in responding to microenvironmental cues. * **Testable Questions:** What is the specific repertoire of mRNA targets bound by [ZFP36](/details-gene/7538) in [fibroblast of breast](/details-cell/CL4006000)? Does knockdown of [ZFP36](/details-gene/7538) in these cells lead to an altered secretome, particularly an increase in pro-inflammatory cytokines or growth factors, and does this altered secretome affect the behavior of breast cancer cells in co-culture?