Details for: CL0000060

Cell ID: CL0000060

Cell Name: odontoblast

Description: legacy def: One of the cells forming the outer surface of dental pulp that produces tooth dentin.

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 odontoblast 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 odontoblast. 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 odontoblast. 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 odontoblast. 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:  odontoblast (CL0000060)

 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 [odontoblast](/details-cell/CL0000060) is a specialized cell type responsible for the formation of dentin, the primary calcified tissue of the tooth. Based on its gene significance profile, the [odontoblast](/details-cell/CL0000060) is characterized as a highly active secretory cell with an exceptionally strong signature for protein synthesis, modification, and quality control. The high specificity score ([csi_z](/glossary/csi_z)) for genes involved in the ubiquitin-proteasome system, RNA processing, and protein trafficking underscores its role as a dedicated protein factory. Unexpectedly, its most defining marker, [ITM2B](/details-gene/9445), is a gene primarily associated with amyloidogenic neurodegenerative diseases, suggesting a novel and unexplored function in biomineralization or protein matrix organization. ## Key Characteristics and Function Analysis of top marker genes in the **Overall** context reveals several core functional clusters that define the [odontoblast](/details-cell/CL0000060). * **Protein Processing and Quality Control:** The most prominent characteristic of the [odontoblast](/details-cell/CL0000060) is its extensive machinery for managing protein synthesis and degradation. The high significance of [SKP1](/details-gene/6500), a key component of SCF ubiquitin-ligase complexes, along with polyubiquitin genes [UBB](/details-gene/7314) and [UBC](/details-gene/7316), points to the critical role of the ubiquitin-proteasome system. This is complemented by the high score for [SUMO2](/details-gene/6613), indicating that SUMOylation is also a key post-translational modification. This robust quality control system is likely essential for handling the high throughput of secreted dentin matrix proteins and preventing the accumulation of misfolded precursors. * **Transcriptional and Post-Transcriptional Regulation:** The cell's function is tightly regulated at the level of gene expression. Significant markers include the proto-oncogene transcription factor [JUN](/details-gene/3725), the antiproliferative transcriptional coregulator [BTG1](/details-gene/694), and [ZFP36](/details-gene/7538), which regulates mRNA stability. Furthermore, genes involved in RNA processing, such as the RNA helicase [DDX5](/details-gene/1655), the cold-inducible RNA-binding protein [CIRBP](/details-gene/1153), and the splicing factor [SRSF5](/details-gene/6430), are highly ranked. This suggests that the production of dentin is controlled by a complex network regulating which genes are transcribed and how their mRNA transcripts are spliced and translated. * **High Metabolic and Secretory Activity:** The energy demands of dentinogenesis are reflected by the specific expression of genes involved in mitochondrial respiration, such as [NDUFA4](/details-gene/4697) and [ATP5F1E](/details-gene/514). The secretory nature of the cell is highlighted by [SRP14](/details-gene/6727), a component of the signal recognition particle that directs proteins to the endoplasmic reticulum for secretion. The presence of [MYL6](/details-gene/4637), a myosin light chain, suggests a role for the cytoskeleton in maintaining the cell's polarized morphology and facilitating the transport of secretory vesicles. * **Anti-Markers:** The low significance scores for genes associated with early development ([DLX6](/details-gene/1750)), neuronal guidance ([SEMA5A](/details-gene/9037)), and mesenchymal progenitor states ([PDGFRA](/details-gene/5156)) are consistent with the [odontoblast](/details-cell/CL0000060) being a terminally differentiated cell type. The relatively low specificity for certain extracellular matrix components like [BGN](/details-gene/633) and [COL27A1](/details-gene/85301) suggests that the cell's unique identity is defined more by the internal machinery that produces the matrix rather than the matrix components themselves. ## Clinical Significance and Contextual Roles As only the **Overall** context is provided, a dynamic analysis of the [odontoblast's](/details-cell/CL0000060) role in health versus disease is not possible. However, the top marker genes offer significant clinical insights. The most striking finding is the top-ranking specificity of [ITM2B](/details-gene/9445) (Integral Membrane Protein 2B). Mutations in this gene are known to cause familial British dementia and familial Danish dementia, both of which are characterized by the formation of amyloid plaques in the brain ([Link](https://doi.org/10.1038/21637), [Link](https://doi.org/10.1073/pnas.080076097)). Its high specificity in a non-neuronal, dentin-secreting cell is highly unusual and suggests an uncharacterized role for [ITM2B](/details-gene/9445) in the organization or maturation of protein-rich extracellular matrices, a process that may share mechanistic similarities with amyloid fibril formation. The significance of genes like [JUN](/details-gene/3725), a known proto-oncogene, and [BTG1](/details-gene/694), an antiproliferative gene, highlights the importance of cell cycle regulation. Dysregulation of these pathways could potentially be involved in pathological conditions such as the formation of odontogenic tumors or aberrant reparative dentin. Similarly, the high expression of [HMGB1](/details-gene/3146), a damage-associated molecular pattern (DAMP) molecule, suggests that [odontoblasts](/details-cell/CL0000060) may play a role in innate immune signaling and inflammation within the dental pulp in response to injury or infection. ## Potential Mechanisms and Research Directions 1. **Hypothesis: [ITM2B](/details-gene/9445) functions as a scaffold or regulator in the assembly of the dentin collagenous matrix, a role analogous to its pathological aggregation in neurodegenerative disease.** * **Surprising Findings:** The premier marker of a tooth-forming cell, [ITM2B](/details-gene/9445), is a gene almost exclusively studied in the context of cerebral amyloidosis. This implies that the fundamental process of ordered protein aggregation, which goes awry in dementia, may be a physiological mechanism co-opted for constructing mineralized tissue. * **Testable Questions:** Does the BRI2 protein encoded by [ITM2B](/details-gene/9445) co-localize with type I collagen fibrils within the predentin and dentin? Does CRISPR-mediated knockout of [ITM2B](/details-gene/9445) in an odontoblast-like cell line result in a disorganized extracellular matrix or impaired mineralization? 2. **Hypothesis: The ubiquitin-proteasome system (UPS) in [odontoblasts](/details-cell/CL0000060) is not just for housekeeping but is a primary regulatory system that controls the quantity and quality of secreted matrix proteins during dentinogenesis.** * **Surprising Findings:** The machinery for protein degradation, exemplified by the high specificity of [SKP1](/details-gene/6500) and ubiquitin genes, appears to be as fundamental to the odontoblast's identity as the secretory pathway itself. This suggests that protein degradation is a rate-limiting and critical control point in dentin formation. * **Testable Questions:** What are the primary substrates of the SCF ubiquitin ligase complex in [odontoblasts](/details-cell/CL0000060) during active matrix secretion? Does the inhibition of the proteasome with agents like bortezomib lead to the accumulation of misfolded procollagen in the endoplasmic reticulum and trigger an unfolded protein response (UPR) in these cells?