Details for: CL0008036

Cell ID: CL0008036

Cell Name: extravillous trophoblast

Description: A trophoblast cell that is not part of a placental villous.

Synonyms: extravillous cytotrophloblast, EVT

Selected Context(s): Overall

Gene Significance Landscape

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Score:
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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 extravillous trophoblast 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 extravillous trophoblast. 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 extravillous trophoblast. 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 extravillous trophoblast. 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:  extravillous trophoblast (CL0008036)

 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 [extravillous trophoblast](/details-cell/CL0008036) (EVT) is a highly specialized placental cell type essential for successful pregnancy, defined by its role in invading the uterine decidua and remodeling the maternal spiral arteries. The gene significance profile for this cell in the **Overall** context underscores a phenotype characterized by intense metabolic activity, complex transcriptional regulation, and robust protein turnover. The top-ranking specific marker, [ITM2B](/details-gene/9445), linked to protein processing, alongside high-specificity markers for polyamine metabolism ([SAT1](/details-gene/6303)), cytoskeletal dynamics (e.g., [MYL12B](/details-gene/103910)), and the ubiquitin-proteasome system ([UBC](/details-gene/7316)), collectively portrays the [extravillous trophoblast](/details-cell/CL0008036) as a metabolically demanding and structurally dynamic cell, primed for tissue invasion and remodeling. ## Key Characteristics and Function The defining gene expression signature of the [extravillous trophoblast](/details-cell/CL0008036) reveals several core functional clusters essential for its unique biological role. * **High Metabolic and Biosynthetic Rate:** The high specificity scores for genes involved in core metabolic and cellular processes, such as [GAPDH](/details-gene/2597) (glycolysis), [SAT1](/details-gene/6303) (polyamine catabolism), and [TPT1](/details-gene/7178) (translationally controlled tumor protein), suggest that EVTs operate at a very high level of metabolic and biosynthetic activity. This is consistent with the energy-intensive demands of proliferation, migration, and tissue remodeling required for placental implantation. * **Complex Transcriptional and Post-Transcriptional Regulation:** A significant number of top markers are involved in gene expression regulation. This includes general transcription factors like [BTF3](/details-gene/689), RNA-binding proteins such as [YBX1](/details-gene/4904) and [HNRNPC](/details-gene/3183), and the immediate early gene [FOS](/details-gene/2353). This regulatory machinery likely orchestrates the precise, spatio-temporal expression programs that govern the switch from a proliferative to an invasive phenotype. * **Robust Protein Turnover and Quality Control:** The ubiquitin-proteasome system is prominently featured, with high specificity for [UBC](/details-gene/7316) (Polyubiquitin-C), the ubiquitin-conjugating enzyme [UBE2D3](/details-gene/7323), the SCF complex component [SKP1](/details-gene/6500), and the proteasome subunit [PSMB1](/details-gene/5689). This indicates that tightly controlled protein degradation is a cornerstone of EVT function, likely crucial for rapid remodeling of the cytoskeleton, cell cycle control, and turnover of signaling molecules during uterine invasion. * **Advanced Motility and Cytoskeletal Dynamics:** The specific expression of multiple non-muscle myosin regulatory light chain genes, including [MYL12B](/details-gene/103910), [MYL12A](/details-gene/10627), and [MYL6](/details-gene/4637), directly highlights the importance of the actomyosin cytoskeleton. This machinery is fundamental to the cell's migratory and invasive capabilities, enabling it to penetrate the uterine stroma. The anti-marker profile is also informative. The low significance of inflammasome components like [NLRP2](/details-gene/55655) may suggest a mechanism to prevent inflammatory responses at the maternal-fetal interface. Furthermore, the low specificity score of the key neuronal protein [SYT1](/details-gene/6857) confirms the non-neuronal identity of this cell type. ## Clinical Significance and Contextual Roles The gene expression profile of the [extravillous trophoblast](/details-cell/CL0008036) provides insights into its role in both normal pregnancy and potential pathologies. * The prominent expression of [SAT1](/details-gene/6303), a key enzyme in polyamine catabolism known to be involved in angiogenesis, is highly relevant to the primary function of EVTs in remodeling maternal spiral arteries. Dysregulation of this process is a known contributor to severe pregnancy disorders such as pre-eclampsia and intrauterine growth restriction. * The identification of [ITM2B](/details-gene/9445) as the top marker is intriguing. While critical for EVT identity, mutations in this gene are causative for familial British and Danish dementias, which involve amyloid peptide deposition ([Link](https://doi.org/10.1038/21637), [Link](https://doi.org/10.1073/pnas.080076097)). This unexpected connection suggests a potentially shared mechanism of protein processing and secretion between EVTs and neuronal cells, warranting further investigation. * The quasi-malignant, invasive nature of trophoblasts is reflected by the high significance of genes often implicated in cancer, such as the proto-oncogene [FOS](/details-gene/2353), the RNA-binding protein [YBX1](/details-gene/4904) (implicated in drug resistance and proliferation), and [GSTP1](/details-gene/2950), which is involved in detoxification and is often overexpressed in tumors. This highlights the delicate balance between controlled invasion in placentation and uncontrolled invasion in malignancy. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The highly specific expression of a broad suite of ubiquitin-proteasome system (UPS) components (e.g., [UBC](/details-gene/7316), [UBE2D3](/details-gene/7323), [SKP1](/details-gene/6500)) in [extravillous trophoblasts](/details-cell/CL0008036) serves as a central regulatory hub. This system may precisely control the half-life of key proteins that either promote or inhibit invasion, thereby enabling the highly regulated "pseudo-malignant" invasion characteristic of placentation. * **Surprising Findings:** The defining signature of EVTs includes not just one or two UPS genes, but a coordinated network of components spanning ubiquitin itself, E2 conjugating enzymes, and E3 ligase elements. This suggests the entire pathway, rather than a single rate-limiting step, is a core feature of the EVT's identity and function. * **Testable Questions:** Does pharmacologic inhibition of the proteasome (e.g., with bortezomib) at sub-lethal concentrations disproportionately affect the invasive capacity of primary human [extravillous trophoblasts](/details-cell/CL0008036) in an in-vitro Matrigel assay compared to their proliferative rate? 2. **Hypothesis:** The immune privilege of the [extravillous trophoblast](/details-cell/CL0008036) at the maternal-fetal interface may be achieved through alternative or dynamically regulated pathways, rather than high constitutive expression of canonical immune checkpoints like PD-L1 ([CD274](/details-gene/29126)). The low defining significance of [CD274](/details-gene/29126) and the inflammasome component [NLRP2](/details-gene/55655) suggests that the basal state of EVTs is one of "immune ignorance" or relies on other, yet to be fully characterized, immunomodulators. * **Surprising Findings:** Given their direct contact with maternal immune cells, the low baseline significance of [CD274](/details-gene/29126) is highly counterintuitive and challenges the prevailing assumption that it acts as a primary, constitutively expressed shield for this cell type. * **Testable Questions:** When [extravillous trophoblasts](/details-cell/CL0008036) are co-cultured with activated maternal T-lymphocytes or NK cells, is the expression of [CD274](/details-gene/29126) and other immune checkpoints dynamically upregulated, and can this induction be linked to specific cytokine signals (e.g., IFN-gamma) from the maternal immune cells?