Details for: CL0009095

Cell ID: CL0009095

Cell Name: endothelial cell of uterus

Description: An endothelial cell that is part of a uterus.

Synonyms: uterine endothelial cell

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 endothelial cell of uterus 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 endothelial cell of uterus. 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 endothelial cell of uterus. 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 endothelial cell of uterus. 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:  endothelial cell of uterus (CL0009095)

 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 [endothelial cell of uterus](/details-cell/CL0009095), also known as a uterine endothelial cell, is a specialized endothelial cell type forming the lining of blood vessels within the uterus. Based on gene significance analysis, its identity is uniquely defined not only by its vascular role but also by an exceptionally high activity in RNA processing and immunomodulation. The specific expression of genes involved in mRNA splicing, transport, and stability, such as [DDX5](/details-gene/1655) and [PABPC1](/details-gene/26986), alongside key immune-regulatory molecules like [HLA E](/details-gene/3133), suggests these cells are highly dynamic and play a critical role in mediating the complex, cyclical changes of the uterine environment, including tissue remodeling and maternal-fetal tolerance. ## Key Characteristics and Function **Overall**, the gene expression profile of the [endothelial cell of uterus](/details-cell/CL0009095) points towards a cell with high metabolic and regulatory activity, essential for its function in a hormonally dynamic tissue. The top markers can be grouped into several key functional clusters: * **RNA Processing and Post-Transcriptional Regulation:** A dominant characteristic of this cell type is the highly significant expression of a suite of genes involved in RNA biology. This includes the RNA helicase [DDX5](/details-gene/1655), the long non-coding RNA [NEAT1](/details-gene/283131) (a core component of nuclear paraspeckles), and numerous RNA-binding proteins essential for splicing and mRNA stability, such as [PABPC1](/details-gene/26986), [HNRNPC](/details-gene/3183), [RBM39](/details-gene/9584), [ARGLU1](/details-gene/55082), and [HNRNPA3](/details-gene/220988). This strong signature suggests that uterine endothelial cells rely heavily on post-transcriptional gene regulation, likely to enable rapid and precise responses to the fluctuating hormonal milieu of the menstrual cycle. * **Immunomodulation and Antigen Presentation:** The high significance of [HLA E](/details-gene/3133) and its essential partner [B2M](/details-gene/567) is a key feature. [HLA E](/details-gene/3133) is a non-classical MHC class I molecule that interacts with inhibitory receptors on Natural Killer (NK) cells. Its prominent expression strongly suggests a crucial role for these endothelial cells in establishing local immune tolerance, a process vital for preventing immune rejection of the semi-allogeneic embryo during pregnancy. * **Metabolic and Mitochondrial Activity:** A cluster of genes related to cellular energy production is highly significant, including several subunits of the mitochondrial respiratory chain ([COX6C](/details-gene/1345), [COX5B](/details-gene/1329)) and ATP synthase ([ATP5MG](/details-gene/10632)). The high expression of [FTH1](/details-gene/2495), an iron storage protein, further underscores a high metabolic rate, likely required to support the extensive angiogenesis and tissue remodeling that characterize the uterine lining. * **Extracellular Matrix Interaction and Cytoskeletal Function:** Genes such as [SPARCL1](/details-gene/8404), which encodes an extracellular matrix-associated protein, and [MYL6](/details-gene/4637), a myosin light chain, indicate that these cells are actively engaged in modulating their microenvironment and maintaining structural integrity. The calcium-binding protein [S100A6](/details-gene/6277) further points to the importance of calcium signaling in regulating these processes. Notably, several genes typically associated with endothelial or stromal identity, such as the ephrin receptor [EPHB4](/details-gene/2050) and type I collagen [COL1A2](/details-gene/1278), are among the least significant markers. This does not imply their absence but suggests their expression is not a unique or defining feature of uterine endothelial cells compared to other cells in their native tissue, possibly distinguishing them from surrounding fibroblasts or other vascular subtypes. ## Clinical Significance and Contextual Roles The unique gene signature of uterine endothelial cells has significant implications for both physiological and pathological processes in the uterus. The pronounced expression of immunomodulatory molecules, particularly [HLA E](/details-gene/3133), is consistent with a central role in pregnancy. These cells may form an immune-privileged barrier that is critical for successful embryo implantation and placentation by directly regulating the activity of uterine NK cells. Dysregulation of this function could contribute to implantation failure or pre-eclampsia. The extensive RNA processing machinery highlighted by this analysis suggests a potential vulnerability. Pathologies such as endometriosis and uterine cancers are characterized by dysregulated cell growth and response to hormones. It is plausible that alterations in the splicing and stability of key transcripts within the uterine endothelium, governed by factors like [DDX5](/details-gene/1655) and [NEAT1](/details-gene/283131), could be contributing factors to these diseases. Furthermore, the high significance of [ITM2B](/details-gene/9445), a gene linked to familial British and Danish dementias through the processing of amyloid-like peptides ([Link](https://doi.org/10.1038/21637)), is a striking finding. While its function in the uterus is unknown, its role in processing transmembrane proteins could be relevant for cell signaling, receptor turnover, or the clearance of protein aggregates within the dynamic endometrial environment. Its specific expression warrants investigation into a potential, previously unrecognized role in uterine biology or pathology. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The profound enrichment of RNA-binding proteins and splicing factors indicates that uterine endothelial cells utilize extensive alternative splicing as a primary mechanism to rapidly adapt their phenotype in response to cyclical hormonal changes, allowing for precise control over angiogenesis, permeability, and immune function without relying solely on transcriptional induction. * **Surprising Findings:** The dominance of the "RNA-processing" signature over more conventional endothelial markers (e.g., cell adhesion molecules) is unexpected. This suggests that the defining characteristic of this cell type may be its regulatory plasticity rather than a static set of structural proteins. * **Testable Questions:** Does selective inhibition of the RNA helicase [DDX5](/details-gene/1655) or knockdown of the lncRNA [NEAT1](/details-gene/283131) in primary human uterine endothelial cells alter their transcriptomic and functional response (e.g., tube formation, proliferation) to estradiol and progesterone treatment in vitro? 2. **Hypothesis:** Uterine endothelial cells are specialized antigen-presenting cells that actively create an immunotolerant microenvironment at the maternal-fetal interface, primarily through the high surface expression of non-classical [HLA E](/details-gene/3133), which serves to inhibit cytotoxic NK cell activity and facilitate embryo implantation. * **Surprising Findings:** The identification of [ITM2B](/details-gene/9445), a gene primarily associated with neurodegenerative amyloid pathologies, as a top-ranked specific marker is a novel discovery. This may suggest a conserved biological process involving the cleavage and clearance of transmembrane proteins that is critical at sites of high metabolic turnover and cell-cell interaction, such as both the neuronal synapse and the maternal-fetal interface. * **Testable Questions:** In a co-culture system, does antibody-mediated blocking of [HLA E](/details-gene/3133) on uterine endothelial cells lead to increased activation and cytotoxicity of uterine-like NK cells? Furthermore, what is the functional consequence of silencing [ITM2B](/details-gene/9445) on the interaction between uterine endothelial cells and trophoblast cells?