Details for: CL1000495

Cell ID: CL1000495

Cell Name: small intestine goblet cell

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

Synonyms: goblet cell of epithelium of small intestine, goblet cell of small intestine, small intestinal goblet cell

Selected Context(s): Overall

Gene Significance Landscape

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Genes

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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 small intestine goblet 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 small intestine goblet 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 small intestine goblet 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 small intestine goblet 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.
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Select a context for the target cell.
Target Cell for CSI:  small intestine goblet cell (CL1000495)

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Nodes (Genes):
 Query Gene
Node size also reflects Target Cell CSI magnitude.
Node Color (Target Cell CSI in specific network):
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 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 [small intestine goblet cell](/details-cell/CL1000495) is a specialized epithelial cell responsible for synthesizing and secreting mucus, a critical component of the gut's protective barrier. **Overall**, the gene significance profile reveals a cell defined by an exceptionally high level of mitochondrial activity. The top marker genes are overwhelmingly components of the mitochondrial electron transport chain, including [COX2](/details-gene/4513), [CYTB](/details-gene/4519), and multiple NADH dehydrogenase subunits. This unique signature suggests that the cell's identity is deeply intertwined with a massive energetic capacity, likely dedicated to the demanding process of synthesizing and secreting large glycoproteins like mucins. This metabolic specialization is further supported by a prominent signature of genes involved in RNA processing and protein quality control, highlighting the extensive molecular machinery required to maintain its secretory function. ## Key Characteristics and Function Analysis of top marker genes, ranked by expression specificity (`csi_z`), reveals several core functional clusters that define the [small intestine goblet cell](/details-cell/CL1000495). * **High-Energy Metabolic Hub:** The most striking feature is the dominance of genes related to aerobic respiration. The list of top markers is populated by mitochondrially-encoded genes such as [COX2](/details-gene/4513), [CYTB](/details-gene/4519), [ND4](/details-gene/4538), [ND3](/details-gene/4537), [ND1](/details-gene/4535), [ND2](/details-gene/4536), and [ND5](/details-gene/4540). This is complemented by nuclear-encoded mitochondrial proteins like [COX4I1](/details-gene/1327) and [ATP5ME](/details-gene/521). This convergence indicates that a high capacity for oxidative phosphorylation is a defining characteristic, providing the substantial ATP required for the synthesis, glycosylation, and exocytosis of mucin polymers. Notably, increased expression of mitochondrial genes like [ND4](/details-gene/4538) has been correlated with the differentiation of colon adenocarcinoma cells into a mucin-producing, goblet-like phenotype, underscoring the link between mitochondrial activity and goblet cell function ([Link](https://pubmed.ncbi.nlm.nih.gov/1377597/)). * **Active Transcriptional and Post-Transcriptional Regulation:** A second major functional signature involves RNA processing. High specificity scores for numerous heterogeneous nuclear ribonucleoproteins ([HNRNPA2B1](/details-gene/3181), [HNRNPU](/details-gene/3192), [HNRNPC](/details-gene/3183)) and splicing factors ([SRSF5](/details-gene/6430), [RBM39](/details-gene/9584), [DDX5](/details-gene/1655)) suggest that intensive mRNA synthesis and modification are central to the cell's operation. The high ranking of the long non-coding RNA [NEAT1](/details-gene/283131), a key component of nuclear paraspeckles, further implies that regulation of gene expression and nuclear architecture are specialized features of this cell type. * **Protein Synthesis and Quality Control:** The high translational demand is matched by a robust protein quality control system, evidenced by the specific expression of ubiquitin genes like [UBB](/details-gene/7314) and the ubiquitin-conjugating enzyme [UBE2D3](/details-gene/7323). These components are essential for managing the high flux of proteins through the endoplasmic reticulum and Golgi apparatus, ensuring proper folding and disposal of misfolded proteins. * **Structural and Signaling Identity:** The cell's identity as a simple epithelial cell is confirmed by the specific expression of [KRT8](/details-gene/3856). Additionally, key regulatory proteins such as [YWHAZ](/details-gene/7534) (14-3-3 protein zeta) and the calcium-binding protein [S100A6](/details-gene/6277) are among the top markers, suggesting their integral roles in signaling pathways that control secretion and cell homeostasis. ## Clinical Significance and Contextual Roles The unique gene signature of the [small intestine goblet cell](/details-cell/CL1000495) carries significant clinical implications, particularly in the context of intestinal health and disease. The profound reliance on mitochondrial function suggests these cells may be particularly vulnerable to metabolic stress, mitochondrial dysfunction, or hypoxia, conditions often associated with inflammatory bowel disease (IBD) and other gastrointestinal disorders. A compromised energy supply could directly impair mucin production, leading to a weakened mucosal barrier and increased susceptibility to pathogens and inflammation. The strong association between mitochondrial gene expression and goblet cell differentiation, as observed in HT-29 cancer cell lines ([Link](https://pubmed.ncbi.nlm.nih.gov/1377597/)), highlights this metabolic profile as a potential biomarker for differentiation status in colorectal cancers. Tumors that retain or upregulate this high-energy signature may have different properties or therapeutic vulnerabilities compared to those that do not. Furthermore, the specific expression of RNA-binding proteins like [RBM39](/details-gene/9584), which was first identified as an autoantigen in a patient with hepatocellular carcinoma ([Link](https://pubmed.ncbi.nlm.nih.gov/8227358/)), hints at the potential for components of the goblet cell's core machinery to become targets of the immune system in the context of cancer or autoimmunity, although this connection requires further investigation. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The extreme dependence on mitochondrial respiration for energy production makes the functional integrity of [small intestine goblet cells](/details-cell/CL1000495), and consequently the gut mucosal barrier, acutely sensitive to mitochondrial stressors. This positions mitochondrial health as a critical checkpoint for intestinal barrier function. * **Surprising Findings:** It is remarkable that the most specific genetic markers for this cell are not the mucin genes themselves (e.g., *MUC2*), but rather the universally expressed mitochondrial genes responsible for powering their production. This suggests that the *degree* of metabolic specialization is a more unique cellular identifier than the specialized product itself. * **Testable Questions:** How do specific mitochondrial inhibitors (e.g., rotenone, antimycin A) quantitatively affect the rate of mucin synthesis and secretion from primary intestinal organoids or goblet cell-like lines? Can dietary interventions known to support mitochondrial function (e.g., supplementation with coenzyme Q10) ameliorate goblet cell depletion or dysfunction in animal models of colitis? 2. **Hypothesis:** The prominent and specific signature of RNA-binding proteins and splicing factors indicates that alternative splicing and post-transcriptional regulation are key mechanisms controlling goblet cell function, differentiation, and adaptation to the intestinal microenvironment. * **Surprising Findings:** The high specificity of generalist RNA processing factors like [HNRNPC](/details-gene/3183) and [SRSF5](/details-gene/6430), as well as the lncRNA [NEAT1](/details-gene/283131), is unexpected. This implies that the precise stoichiometry of these factors, or the expression of cell-specific isoforms, is uniquely tuned in goblet cells to manage the massive and specialized transcriptional output required for mucus production. * **Testable Questions:** Using long-read sequencing on isolated goblet cells, what are the dominant splice isoforms for key mucin and glycosyltransferase genes, and how do these patterns change upon exposure to inflammatory cytokines or microbial products? Does knockdown of [NEAT1](/details-gene/283131) in intestinal organoids disrupt the localization or expression of key transcription factors and lead to defects in goblet cell maturation or mucus secretion?