Details for: CL0000071

Cell ID: CL0000071

Cell Name: blood vessel endothelial cell

Description: An endothelial cell that lines the vasculature.

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 blood vessel endothelial 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 blood vessel endothelial 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 blood vessel endothelial 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 blood vessel endothelial 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:  blood vessel endothelial cell (CL0000071)

 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 [blood vessel endothelial cell](/details-cell/CL0000071) is an essential cell type that forms the inner lining of the vasculature. **Overall**, the gene significance profile suggests these cells are defined by an exceptionally high and specific level of transcriptional and translational activity, coupled with robust metabolic function and a key role in immune surveillance. The high specificity scores (`csi_z`) for general transcription factors like [BTF3](/details-gene/689) and RNA helicases like [DDX5](/details-gene/1655) indicate that while these processes are fundamental to all cells, their regulation and execution are uniquely characteristic of the endothelial lineage. This is further supported by the prominence of genes involved in antigen presentation, such as [B2M](/details-gene/567) and [HLA E](/details-gene/3133), underscoring their function as a critical interface between the circulation and surrounding tissues. ## Key Characteristics and Function Analysis of top marker genes reveals several interconnected functional clusters that define the [blood vessel endothelial cell](/details-cell/CL0000071). * **Protein Synthesis and Gene Regulation:** A striking feature is the high specificity of numerous genes integral to transcription, RNA processing, and translation. This includes the general transcription factor [BTF3](/details-gene/689), the RNA helicase [DDX5](/details-gene/1655), the long non-coding RNA [NEAT1](/details-cell/CL0000071) involved in nuclear paraspeckle formation, and several elongation factors ([EEF1D](/details-gene/1936), [EEF1B2](/details-gene/1933)). Additionally, RNA-binding proteins such as [PABPC1](/details-gene/26986), [HNRNPA2B1](/details-gene/3181), and [YBX1](/details-gene/4904) are highly significant. This suggests that endothelial cells maintain a state of high readiness, with sophisticated regulatory control at multiple levels to rapidly respond to physiological and pathological signals. * **Metabolic Activity and Energy Production:** The cell type exhibits a strong signature of mitochondrial function and metabolic activity. This is highlighted by the specific expression of mitochondrially-encoded NADH dehydrogenase subunits ([ND2](/details-gene/4536), [ND1](/details-gene/4535)) and nuclear-encoded components of the respiratory chain ([ATP5F1E](/details-gene/514), [COX7C](/details-gene/1350)). The high significance of [SAT1](/details-gene/6303), a key enzyme in polyamine catabolism which is also linked to angiogenesis, further points to a specialized metabolic state supporting endothelial function and proliferation. * **Immune Surveillance:** The data strongly support the role of endothelial cells in immunity. [B2M](/details-gene/567), the light chain of MHC class I molecules, and the non-classical MHC class I molecule [HLA E](/details-gene/3133) are top markers. [HLA E](/details-gene/3133) is particularly important for interacting with NK cells and a subset of T cells, positioning endothelial cells as critical sentinels that modulate immune responses at the vascular barrier. * **Protein Quality Control and Trafficking:** Genes associated with the ubiquitin-proteasome system ([UBC](/details-gene/7316), [UBB](/details-gene/7314)) and protein transport via the signal recognition particle ([SRP14](/details-gene/6727)) are also significant. This is consistent with a cell type that must efficiently manage a high rate of protein synthesis and respond to cellular stress. **Conversely**, the anti-marker list provides insight into what these cells are not. The low significance scores for genes like [TMC1](/details-gene/117531), which is crucial for cochlear hair-cell function, and [GPIHBP1](/details-gene/338328), a specific transporter for lipoprotein lipase in tissues like adipose and muscle, indicate that this profile represents a general [blood vessel endothelial cell](/details-cell/CL0000071), rather than one from a highly specialized vascular bed. The inconsistent significance across different mitochondrial-encoded genes (e.g., high for [ND1](/details-gene/4535)/[ND2](/details-gene/4536) but low for [ND4](/details-gene/4538), [COX1](/details-gene/4512), and [COX3](/details-gene/4514)) suggests a specific, regulated stoichiometry of respiratory chain complexes rather than a simple global upregulation of mitochondrial biogenesis. ## Clinical Significance and Contextual Roles **Overall**, the gene expression profile of [blood vessel endothelial cells](/details-cell/CL0000071) highlights their central role in vascular homeostasis and disease. The machinery for high protein turnover and metabolic activity is fundamental to maintaining the integrity of the vascular barrier, regulating blood flow, and controlling angiogenesis. The pronounced immune signature, characterized by [B2M](/details-gene/567) and [HLA E](/details-gene/3133), is clinically significant. Endothelial dysfunction is a hallmark of many inflammatory diseases, including atherosclerosis and sepsis, where the endothelium becomes activated, expressing adhesion molecules and presenting antigens that recruit leukocytes. The high baseline specificity of these immune components suggests endothelial cells are not passive bystanders but are primed for active participation in immune responses. The high significance of [SAT1](/details-gene/6303) is particularly noteworthy. As a rate-limiting enzyme in polyamine catabolism, it is implicated in cell growth and differentiation. Its established role in angiogenesis makes it a potential therapeutic target for diseases characterized by abnormal vessel growth, such as cancer and diabetic retinopathy. Furthermore, the prominence of RNA-binding proteins and regulatory RNAs like [NEAT1](/details-gene/283131) suggests that dysregulation of post-transcriptional control could be a key mechanism in endothelial dysfunction and vascular diseases. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The unique transcriptional and metabolic signature of blood vessel endothelial cells reflects a tightly coordinated regulation between the nuclear and mitochondrial genomes to sustain high bioenergetic demand and rapid responsiveness. The specific pattern of high significance for certain mitochondrial electron transport chain subunits (e.g., [ND1](/details-gene/4535), [ND2](/details-gene/4536)) alongside general transcription factors ([BTF3](/details-gene/689)) suggests that these nuclear factors may be pivotal in maintaining a specific, optimized mitochondrial proteome tailored for endothelial function. * **Surprising Findings:** The striking disparity in significance scores among different mitochondrially-encoded subunits of the same respiratory complexes (e.g., Complex I) is unexpected. This challenges the assumption of uniform regulation and suggests a more nuanced, subunit-specific control mechanism that may be unique to endothelial cells. * **Testable Questions:** How does siRNA-mediated knockdown of the top nuclear marker [BTF3](/details-gene/689) affect the transcription and protein levels of specifically high-CSI mitochondrial genes like [ND1](/details-gene/4535) versus low-CSI genes like [ND4](/details-gene/4538)? Does this manipulation alter endothelial barrier function or metabolic resilience under hypoxic stress? 2. **Hypothesis:** Post-transcriptional gene regulation, orchestrated by a specific suite of RNA-binding proteins ([HNRNPA2B1](/details-gene/3181), [YBX1](/details-gene/4904)) and nuclear-retained lncRNAs ([NEAT1](/details-gene/283131)), is a primary mechanism through which endothelial cells fine-tune their immunomodulatory phenotype. This regulatory layer may control the splicing, stability, and translation of key immune transcripts like [HLA E](/details-gene/3133) and [B2M](/details-gene/567), allowing for a rapid and graded response to inflammatory stimuli without requiring de novo transcription. * **Surprising Findings:** It is notable that a lncRNA like [NEAT1](/details-gene/283131), known for its role in forming nuclear paraspeckles, emerges as a highly specific marker. This suggests that the architectural organization of the nucleus and RNA processing bodies may be a defining and functionally critical feature of the endothelial cell state. * **Testable Questions:** Does depletion of [NEAT1](/details-gene/283131) in cultured human endothelial cells alter the alternative splicing patterns of immune-related transcripts following stimulation with IFN-gamma? Furthermore, does this intervention affect the surface expression of [HLA E](/details-gene/3133) and modulate the cytotoxic activity of co-cultured NK cells?