Details for: CL0000622

Cell ID: CL0000622

Cell Name: acinar cell

Description: A secretory cell that is grouped together with other cells of the same type to form grape shaped clusters known as acini (singular acinus).

Synonyms: acinic cell, acinous cell

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 acinar 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 acinar 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 acinar 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 acinar 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:  acinar cell (CL0000622)

 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 [acinar cell](/details-cell/CL0000622) is a specialized secretory epithelial cell, organized into clusters known as acini. Based on its gene significance profile, this cell is fundamentally characterized by an exceptionally high level of protein synthesis and metabolic activity. The unique and defining expression of numerous nuclear-encoded mitochondrial components, translation machinery, and protein transport factors underscores its primary role as a professional secretory cell, likely involved in producing and exporting large quantities of proteins, such as digestive enzymes or components of mucosal secretions. ## Key Characteristics and Function **Overall**, the gene expression landscape of the [acinar cell](/details-cell/CL0000622) points toward a cellular factory optimized for high-throughput protein production and secretion, powered by a vast and specifically regulated mitochondrial network. The top marker genes can be grouped into distinct functional clusters that define its core biological activities. * **Intense Protein Synthesis and Processing:** A prominent feature is the high specificity of genes essential for protein translation and RNA management. Key markers include [EEF1D](/details-gene/1936), a translation elongation factor, and [PABPC1](/details-gene/26986), a poly(A)-binding protein crucial for mRNA stability and translation initiation. Furthermore, the significance of transcription factors like [BTF3](/details-gene/689) and components of the ubiquitin-proteasome system such as [SKP1](/details-gene/6500) and [UBB](/details-gene/7314) suggests a tightly regulated pipeline of gene expression from transcription through to protein quality control and turnover. * **Expansive and Specialized Energy Metabolism:** The most striking characteristic is the cell's reliance on aerobic respiration, evidenced by a large suite of highly specific, nuclear-encoded mitochondrial genes. These include multiple subunits of cytochrome c oxidase ([COX7C](/details-gene/1350), [COX4I1](/details-gene/1327), [COX5B](/details-gene/1329)) and ATP synthase ([ATP5F1E](/details-gene/514), [ATP5MG](/details-gene/10632), [ATP5MC2](/details-gene/517)). The list is further augmented by genes for mitochondrial protein import ([TOMM7](/details-gene/54543), [CHCHD2](/details-gene/51142)) and metabolite transport ([SLC25A6](/details-gene/293)), collectively indicating that the maintenance of a large and efficient mitochondrial network is a defining feature of this cell's identity. * **Secretory and Protective Functions:** The cell's secretory nature is directly supported by the high significance of [PIGR](/details-gene/5284), the polymeric immunoglobulin receptor responsible for transporting IgA and IgM across the epithelium into mucosal secretions. This firmly places the [acinar cell](/details-cell/CL0000622) as a key player in mucosal immunity. Additionally, the specific expression of [SLPI](/details-gene/6590), a secretory leukocyte protease inhibitor, suggests a crucial role in protecting tissues from damage by proteases, a function vital in environments like the pancreas or oral cavity. * **Management of Metabolic Stress:** The high metabolic rate inherent to these cells necessitates robust systems for managing byproducts. The specific expression of both ferritin heavy and light chains ([FTH1](/details-gene/2495) and [FTL](/details-gene/2512)) points to a critical role in iron sequestration, which is essential for preventing oxidative damage. This is complemented by [GSTP1](/details-gene/2950), a glutathione S-transferase involved in detoxification, indicating that these cells are well-equipped to handle the oxidative stress generated by their own metabolic activity. * **Anti-Markers:** The analysis of least significant genes provides valuable insight. Notably, genes encoded by the mitochondrial genome itself (e.g., [COX1](/details-gene/4512), [ATP6](/details-gene/4508), [ND1](/details-gene/4535), [ND4](/details-gene/4538)) show very low expression specificity (`csi_z`). This suggests that while these genes are abundantly expressed, their expression is not unique to [acinar cells](/details-cell/CL0000622) but is a general feature of all metabolically active cells. The defining characteristic of the [acinar cell](/details-cell/CL0000622) is therefore not the core mitochondrial machinery, but the specific nuclear-encoded regulatory and structural program that supports its massive expansion. ## Clinical Significance and Contextual Roles The gene profile of the [acinar cell](/details-cell/CL0000622) highlights its central role in glandular function and mucosal defense, and also illuminates its potential vulnerabilities in disease. The cell's immense protein synthesis load makes it theoretically susceptible to endoplasmic reticulum (ER) stress, a key pathological feature in diseases like pancreatitis. The high expression of protective genes like [SLPI](/details-gene/6590) and antioxidants like [GSTP1](/details-gene/2950) is likely a crucial adaptation to prevent autodigestion and oxidative damage. Dysregulation of these protective mechanisms could be a critical step in the initiation of inflammatory diseases affecting secretory glands. The prominent role of [PIGR](/details-gene/5284) underscores the importance of [acinar cells](/details-cell/CL0000622) in providing a first line of defense at mucosal surfaces. Impaired [PIGR](/details-gene/5284)-mediated transport of antibodies could lead to increased susceptibility to infections in the respiratory, gastrointestinal, or reproductive tracts. Furthermore, the top marker, [TPT1](/details-gene/7178), is also known as a "tumor protein," and its high expression, while likely related to the cell's normal translational activity, is a feature often co-opted in malignancy. This suggests that the inherent high metabolic and proliferative potential of [acinar cells](/details-cell/CL0000622) may make them susceptible to malignant transformation, leading to adenocarcinomas. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The distinct identity of the [acinar cell](/details-cell/CL0000622) is primarily established by a specific nuclear transcriptional program that massively upregulates the protein import, assembly, and substrate transport machinery of mitochondria, rather than by the core respiratory chain genes encoded within the mitochondrial DNA itself. This coordinated nuclear program enables the extreme bioenergetic capacity required for continuous, high-volume protein secretion. * **Surprising Findings:** The observation that universally essential mitochondrial-encoded genes such as [COX1](/details-gene/4512) and [ND4](/details-gene/4538) rank as anti-markers based on expression specificity (`csi_z`) is paradoxical for a cell defined by high metabolic output. It highlights that specificity, not just abundance, is key to cellular identity. * **Testable Questions:** Does the targeted knockout of transcription factors known to regulate nuclear-encoded mitochondrial biogenesis (e.g., NRF1, PGC-1α) lead to a failure of [acinar cell](/details-cell/CL0000622) differentiation and a disproportionate loss of secretory function compared to their effect on the basal metabolism of other epithelial cell types? 2. **Hypothesis:** The constitutively high expression of a suite of cytoprotective genes, including those for iron management ([FTH1](/details-gene/2495), [FTL](/details-gene/2512)), detoxification ([GSTP1](/details-gene/2950)), and protease inhibition ([SLPI](/details-gene/6590)), represents an essential, pre-emptive adaptation to counteract the high intrinsic levels of oxidative and proteolytic stress generated by the cell's core secretory function. Failure in this anticipatory defense system is likely a primary event in acinar cell injury and glandular disease. * **Surprising Findings:** Rather than being induced by stress, the baseline expression of these protective genes is a defining feature of the cell's identity. This suggests that the "acinar cell" state is one of managed, high-level stress. * **Testable Questions:** In an in vitro model of [acinar cells](/details-cell/CL0000622), does shRNA-mediated knockdown of [GSTP1](/details-gene/2950) or [FTL](/details-gene/2512) increase the cell's sensitivity to pro-inflammatory stimuli or agents that induce ER stress, leading to accelerated cell death or a pathological secretory response?