Details for: CL0000163

Cell ID: CL0000163

Cell Name: endocrine cell

Description: A cell of an endocrine gland, ductless glands that secrete substances which are released directly into the circulation and which influence metabolism and other body functions.

Synonyms: endocrinocyte

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 endocrine 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 endocrine 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 endocrine 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 endocrine 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:  endocrine cell (CL0000163)

 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 [endocrine cell](/details-cell/CL0000163) is a specialized cell type responsible for synthesizing and secreting hormones directly into the circulatory system to regulate distant target organs. The gene significance profile for this cell type is overwhelmingly dominated by markers associated with mitochondrial energy production, such as [COX6C](/details-gene/1345), [ATP5MG](/details-gene/10632), and [UQCR11](/details-gene/10975). This strong bioenergetic signature, coupled with the high significance of the canonical secretory granule protein [CHGA](/details-gene/1113), highlights that the core identity of the [endocrine cell](/details-cell/CL0000163) is that of a high-energy metabolic factory dedicated to the demanding process of hormone synthesis and regulated secretion. ## Key Characteristics and Function **Overall**, the gene expression landscape of the [endocrine cell](/details-cell/CL0000163) points to a highly specialized and metabolically active cell. The key functions can be grouped into several themes based on the top marker genes. * **Mitochondrial Bioenergetics:** The most striking feature is the profound enrichment for genes involved in oxidative phosphorylation. Top markers include multiple subunits of the electron transport chain, such as Cytochrome c oxidase ([COX6C](/details-gene/1345), [COX7C](/details-gene/1350), [COX7A2](/details-gene/1347), [COX5B](/details-gene/1329)), Ubiquinol-cytochrome c reductase ([UQCR11](/details-gene/10975)), and ATP synthase ([ATP5MG](/details-gene/10632), [ATP5F1E](/details-gene/514)). The high Z-scores for these genes suggest that an exceptional capacity for aerobic respiration is a defining and specific characteristic of this cell type, likely providing the substantial ATP required for protein synthesis, packaging, and exocytosis. * **Regulated Secretion:** The high significance of [CHGA](/details-gene/1113) (Chromogranin A) confirms the cell's identity as a professional secretory cell. [CHGA](/details-gene/1113) is a critical component of secretory granules in endocrine and neuroendocrine cells, where it is involved in the packaging and processing of peptide hormones. Its prominence underscores the central role of the regulated secretory pathway in this cell's function. * **Epithelial and Structural Identity:** The presence of [KRT8](/details-gene/3856) (Keratin 8) and [CLDN7](/details-gene/1366) (Claudin 7) as significant markers indicates a distinct epithelial nature. These genes are crucial for maintaining cellular structure and forming tight junctions, respectively, consistent with the organization of [endocrine cells](/details-cell/CL0000163) into glandular tissues. * **Calcium-Dependent Signaling:** The calcium-binding protein [S100A6](/details-gene/6277) is a notable marker, which aligns with the fundamental role of calcium influx as the primary trigger for the fusion of hormone-containing vesicles with the plasma membrane during exocytosis. * **Anti-Markers and Cellular Specialization:** The negative significance of numerous ubiquitously expressed genes involved in general transcription ([BTG1](/details-gene/694)), RNA processing ([HNRNPA2B1](/details-gene/3181), [DDX5](/details-gene/1655)), and protein turnover ([UBC](/details-gene/7316)) is notable. This does not imply an absence of these functions but suggests that the cell's machinery may be highly specialized and focused on a limited set of high-abundance transcripts (i.e., hormones and secretory components), making the expression of these general factors less of a defining feature compared to other cell types. ## Clinical Significance and Contextual Roles The gene signature of the [endocrine cell](/details-cell/CL0000163) has direct implications for clinical diagnostics and disease pathology. [CHGA](/details-gene/1113) is a well-established and widely used serum biomarker for the diagnosis and monitoring of neuroendocrine tumors (NETs), as these cancers often retain the strong secretory phenotype of their cell of origin. The high significance of [KRT8](/details-gene/3856) is also relevant, as it is a marker for simple epithelia and can be used in immunohistochemistry to identify carcinomas derived from endocrine glands. The profound mitochondrial signature suggests that metabolic dysfunction is central to endocrine pathologies. Defects in oxidative phosphorylation can impair hormone production and secretion, potentially contributing to conditions like diabetes mellitus or adrenal insufficiency. Furthermore, the reliance on this pathway could represent a therapeutic vulnerability in endocrine cancers. The marker [CD24](/details-gene/100133941), often associated with cancer stem cells and immune regulation, is also significant. Its expression on [endocrine cells](/details-cell/CL0000163) may play a role in tissue homeostasis and could be hijacked during malignant transformation to promote tumor growth and immune evasion. The presence of [B2M](/details-gene/567), a component of the MHC class I complex, indicates that these cells actively present endogenous antigens, making them subject to immune surveillance by [T-cells](/details-cell/CL0000084). ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The defining metabolic feature of [endocrine cells](/details-cell/CL0000163) is a constitutively high state of mitochondrial readiness and capacity, which is essential to buffer the energetic demands of pulsatile or stimulus-induced hormone secretion. This is suggested by the observation that core components of the oxidative phosphorylation machinery ([COX6C](/details-gene/1345), [ATP5MG](/details-gene/10632), etc.) are the most specific markers, even more so than many specific hormones. * **Surprising Findings:** The overwhelming dominance of pan-mitochondrial genes over specific hormonal markers (with the exception of the general secretory protein [CHGA](/details-gene/1113)) suggests that the *capacity for energy production* is a more universal and defining feature of this cell class than the identity of the specific hormone being produced. * **Testable Questions:** Does acute stimulation of hormone secretion in [endocrine cells](/details-cell/CL0000163) (e.g., with a secretagogue) lead to an immediate increase in oxygen consumption rate without a corresponding lag for transcriptional upregulation of mitochondrial genes, consistent with a pre-existing high capacity? 2. **Hypothesis:** [Endocrine cells](/details-cell/CL0000163) actively shape their local tissue microenvironment through a secretome that extends beyond classical hormones, engaging in paracrine signaling and immunomodulation. This is supported by the co-expression of the canonical secretory protein [CHGA](/details-gene/1113) with the growth factor [MDK](/details-gene/4192) and the immune presentation molecule [B2M](/details-gene/567). * **Surprising Findings:** The identification of [MDK](/details-gene/4192), a heparin-binding growth factor involved in inflammation and tissue repair, as a significant marker suggests a previously underappreciated role for [endocrine cells](/details-cell/CL0000163) in local signaling, distinct from their systemic endocrine function. * **Testable Questions:** What is the full secretome of primary [endocrine cells](/details-cell/CL0000163) from a specific gland under basal and stimulated conditions, and how does [MDK](/details-gene/4192) co-release with the primary hormone to influence the behavior of adjacent stromal or immune cells?