Details for: CL1000343

Cell ID: CL1000343

Cell Name: paneth cell of epithelium of small intestine

Description: A paneth cell that is part of the epithelium of small intestine.

Selected Context(s): Overall

Gene Significance Landscape

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Cell Significance Index (CSI) is uniquely calculated to reveal cell-specific gene markers. More info here

Image representation

Depiction of paneth cell of epithelium of small intestine
Courtesy of SwissBioPics

Significant Genes List

Genes with the highest and lowest Percentile Rank Scores (PRS) for paneth cell of epithelium of small intestine 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 paneth cell of epithelium of small intestine. 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 paneth cell of epithelium of small intestine. 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 paneth cell of epithelium of small intestine. 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.
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Select a context for the target cell.
Target Cell for CSI:  paneth cell of epithelium of small intestine (CL1000343)

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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 [paneth cell of epithelium of small intestine](/details-cell/CL1000343) is a specialized secretory epithelial cell located at the base of the intestinal crypts. Analysis of its gene significance profile reveals an overwhelming and defining characteristic: an exceptionally high expression specificity of genes involved in mitochondrial function and aerobic respiration. The **Overall** top markers are almost exclusively components of the mitochondrial electron transport chain, such as [ND3](/details-gene/4537) and [COX2](/details-gene/4513). This signature strongly suggests that Paneth cells operate at an extremely high metabolic rate, consistent with their known role as professional secretory cells that produce and release large quantities of antimicrobial peptides to maintain gut homeostasis. ## Key Characteristics and Function The molecular profile of the [paneth cell of epithelium of small intestine](/details-cell/CL1000343) is dominated by genes reflecting a massive investment in energy production and protein synthesis. * **Metabolic Powerhouse for Secretion:** The most specific genetic markers for this cell type are components of the mitochondrial respiratory chain. This includes mitochondrially-encoded genes like [ND3](/details-gene/4537) (CSI: 35.88), [COX2](/details-gene/4513) (CSI: 35.84), [CYTB](/details-gene/4519) (CSI: 35.72), [ND1](/details-gene/4535) (CSI: 35.68), and [COX1](/details-gene/4512) (CSI: 32.58), as well as nuclear-encoded mitochondrial proteins such as [COX4I1](/details-gene/1327), [COX5B](/details-gene/1329), and [COX6C](/details-gene/1345). The high Z-score CSI and maximum effect size (+1.0000) for these genes indicate that this high level of expression is a uniquely defining feature. This robust aerobic respiration capacity is likely essential to generate the vast amounts of ATP required for the synthesis, packaging, and secretion of antimicrobial proteins. * **Robust Protein Synthesis and Processing:** Complementing its metabolic activity, the Paneth cell shows specific expression of genes integral to transcription and translation. Markers such as [HNRNPU](/details-gene/3192), [YBX1](/details-gene/4904), and [DDX5](/details-gene/1655) are involved in RNA binding and processing, while [NPM1](/details-gene/4869) plays a role in ribosome biogenesis. This machinery is consistent with the cell's primary function as a factory for antimicrobial peptides. * **Specialized Innate Immunity Role:** The specific expression of [FTH1](/details-gene/2495), the heavy chain of ferritin, suggests that iron metabolism is a key aspect of Paneth cell function. This may serve a dual purpose: providing iron as a cofactor for metabolic enzymes and sequestering it from invading microbial pathogens as a defense mechanism. Conversely, the low significance of genes associated with adaptive immunity, such as [B2M](/details-gene/567), underscores the Paneth cell's distinct role in innate, rather than adaptive, immune surveillance. ## Clinical Significance and Contextual Roles **Overall**, the gene signature of the [paneth cell of epithelium of small intestine](/details-cell/CL1000343) highlights its central role in maintaining intestinal homeostasis through a highly energy-dependent secretory program. This reliance on mitochondrial function suggests that the cell's health is intrinsically linked to its metabolic state. Dysfunction of Paneth cells is a key feature in the pathogenesis of inflammatory bowel diseases (IBD), such as Crohn's disease. The data suggest that metabolic stress or mitochondrial defects could be a primary cause of such dysfunction, leading to an impaired antimicrobial barrier and chronic inflammation. The high specificity of mitochondrial complex components ([ND1](/details-gene/4535), [ND2](/details-gene/4536), [ND3](/details-gene/4537), [ND4](/details-gene/4538), [ND5](/details-gene/4540)) makes this pathway a potential point of vulnerability. Furthermore, the prominence of [FTH1](/details-gene/2495) implicates dysregulated iron homeostasis, which can generate oxidative stress and exacerbate tissue damage, as a potential contributor to intestinal pathology. ## Potential Mechanisms and Research Directions 1. **Hypothesis: The extreme mitochondrial signature of Paneth cells represents a critical metabolic vulnerability, where defects in energy production are a primary driver of their dysfunction in inflammatory bowel disease.** * **Surprising Findings:** The most specific genetic markers for Paneth cells are not their well-known effector molecules (e.g., defensins, lysozyme), but rather the fundamental machinery of energy production. This implies that the cell's metabolic state is its most uniquely defining and perhaps most critical feature, superseding the expression of its secretory products. * **Testable Questions:** In intestinal organoid models, does targeted inhibition of mitochondrial electron transport chain complexes (e.g., using metformin or rotenone) disproportionately compromise the viability and antimicrobial secretory function of Paneth cells compared to other intestinal epithelial cell types? 2. **Hypothesis: Paneth cells actively utilize iron sequestration, mediated by high levels of ferritin ([FTH1](/details-gene/2495)), as a core component of their innate immune function, in addition to secreting antimicrobial peptides.** * **Surprising Findings:** An iron storage protein, [FTH1](/details-gene/2495), ranks as a highly specific marker, suggesting its role extends beyond simple housekeeping and is integral to the specialized function of the Paneth cell, potentially as a direct antimicrobial strategy. * **Testable Questions:** Upon co-culture with pathogenic versus commensal bacteria, how do Paneth cells modulate the expression of [FTH1](/details-gene/2495) and alter intracellular iron concentrations, and does chelation of intracellular iron affect their ability to control bacterial growth?