Details for: CL4033054

Cell ID: CL4033054

Cell Name: perivascular cell

Description: A cell that is adjacent to a vessel. A perivascular cell plays a crucial role in maintaining vascular function and tissue homeostasis. This cell type regulates vessel integrity and flow dynamics.

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 perivascular 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 perivascular 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 perivascular 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 perivascular 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:  perivascular cell (CL4033054)

 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 [perivascular cell](/details-cell/CL4033054) is defined as a cell adjacent to a blood vessel, playing a crucial role in maintaining vascular integrity and function. Analysis of its gene significance profile reveals a cell characterized by exceptionally high translational and metabolic activity. The most specific markers, such as the translationally controlled tumor protein [TPT1](/details-gene/7178), and numerous components of the translational machinery and mitochondrial respiratory chain, suggest that a primary role of this cell is robust protein synthesis and energy production. This biosynthetic readiness likely supports its functions in vascular homeostasis, immune surveillance, and dynamic response to microenvironmental cues. ## Key Characteristics and Function **Overall**, the gene expression landscape of the [perivascular cell](/details-cell/CL4033054) is dominated by genes essential for fundamental cellular processes, indicating a high state of metabolic and biosynthetic activity. These key markers can be grouped into several functional clusters: * **Translational Machinery and RNA Processing:** The most significant defining marker is [TPT1](/details-gene/7178) (CSI: 70.79), a protein involved in a wide array of cellular processes, including protein synthesis. This is strongly supported by high specificity scores for numerous other genes in this category, including the poly(A)-binding protein [PABPC1](/details-gene/26986), elongation factors [EEF1D](/details-gene/1936) and [EEF1B2](/details-gene/1933), the general transcription factor [BTF3](/details-gene/689), and the nucleolar protein [NPM1](/details-gene/4869). This collective signature points to a cell that is heavily invested in the synthesis of new proteins. * **Energy Metabolism and Mitochondrial Function:** A prominent feature is the high significance of genes encoding components of the mitochondrial electron transport chain. These include cytochrome c oxidase subunits ([COX4I1](/details-gene/1327), [COX2](/details-gene/4513)) and NADH dehydrogenase subunits ([ND4](/details-gene/4538), [ND5](/details-gene/4540)). This suggests a high energy demand, likely required to fuel the cell's extensive biosynthetic activities and maintain vascular function. * **Immune Surveillance and Inflammatory Response:** The profile includes key immune-related genes. [B2M](/details-gene/567), a core component of MHC class I molecules, has a very high CSI (59.94), indicating a potential role in antigen presentation to [CD8-positive, alpha-beta T cells](/details-cell/CL0000625). Additionally, the macrophage migration inhibitory factor [MIF](/details-gene/4282), a pro-inflammatory cytokine, is a significant marker. The iron-storage protein [FTL](/details-gene/2512), implicated in innate immunity, further supports a role for these cells as local immune sentinels. * **Cytoskeletal and Contractile Components:** The presence of myosin light chains [MYL6](/details-gene/4637) and [MYL12B](/details-gene/103910) suggests that these cells possess contractile capabilities. This is consistent with their perivascular location, where they may contribute to the regulation of vascular tone and blood flow. The anti-marker profile is less defined, with many genes showing low but positive effect sizes. The low significance of transcription factors like [SRF](/details-gene/6722) and cytokines like [IL6](/details-gene/3569) in this **Overall** context suggests these pathways may be more dynamically regulated rather than constitutively defining the cell's core identity. ## Clinical Significance and Contextual Roles Given their strategic location and functional profile, [perivascular cells](/details-cell/CL4033054) are likely key players in both vascular health and disease. Their high baseline metabolic rate and translational capacity suggest they are primed to respond rapidly to injury, inflammation, or changes in tissue demand. The significant expression of immune modulators like [MIF](/details-gene/4282) and antigen-presenting machinery ([B2M](/details-gene/567)) positions these cells at the interface of the circulatory and immune systems. In pathological states such as atherosclerosis or chronic inflammation, these cells could become key drivers of the local inflammatory response, potentially by recruiting and activating other immune cells. Dysregulation of their metabolic and protein synthesis machinery could contribute to fibrosis or vascular remodeling, common features of many cardiovascular and chronic inflammatory diseases. The constitutive expression of these "readiness" genes implies that their contribution to pathology may involve the amplification of these baseline functions rather than the activation of entirely new programs. ## Potential Mechanisms and Research Directions 1. **Hypothesis: Perivascular cells function as localized hubs of immune surveillance, maintained in a state of high metabolic readiness to orchestrate rapid inflammatory responses.** The strong co-expression of genes for antigen presentation ([B2M](/details-gene/567)), cytokine production ([MIF](/details-gene/4282)), and robust protein synthesis ([TPT1](/details-gene/7178), elongation factors) suggests these cells can quickly produce and secrete immune mediators upon detecting vascular stress or pathogens. * **Surprising Findings:** The most specific markers for this cell are not classic immune effectors or structural proteins, but rather fundamental components of the translational machinery. This suggests that the cell's defining feature is its *potential* to mount a response, with its biosynthetic capacity being the rate-limiting factor. * **Testable Questions:** Does selective depletion of [perivascular cells](/details-cell/CL4033054) or conditional knockout of [MIF](/details-gene/4282) within them alter the kinetics and magnitude of leukocyte infiltration following a localized vascular injury? 2. **Hypothesis: The high energy demand, evidenced by mitochondrial gene signatures, directly fuels the mechanical functions of perivascular cells in regulating microvascular tone and integrity.** The significant presence of both mitochondrial respiratory chain components ([COX2](/details-gene/4513), [ND4](/details-gene/4538)) and myosin light chains ([MYL6](/details-gene/4637), [MYL12B](/details-gene/103910)) implies a tight coupling between energy production and cytoskeletal mechanics. This constant energy expenditure may be essential for maintaining the physical barrier and hemodynamic control exerted by these cells. * **Surprising Findings:** The specificity of mitochondrial genes rivals that of many structural proteins. This could indicate that maintaining a high ATP-generating capacity is a more unique and defining characteristic for these cells compared to other vessel-associated cell types, which may rely more on glycolytic pathways. * **Testable Questions:** Using in vivo two-photon microscopy, does acute inhibition of mitochondrial ATP synthesis lead to measurable changes in perivascular cell morphology, their association with the vessel wall, and local capillary permeability or blood flow dynamics?