Details for: CL0019029

Cell ID: CL0019029

Cell Name: centrilobular region hepatocyte

Description: Any hepatocyte that is part of the liver lobule centrilobular region. These cells are the primary location for the biotransformation of drugs.

Synonyms: centrilobular hepatocyte

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

Significant Genes List

Genes with the highest and lowest Percentile Rank Scores (PRS) for centrilobular region hepatocyte 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 centrilobular region hepatocyte. 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 centrilobular region hepatocyte. 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 centrilobular region hepatocyte. 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:  centrilobular region hepatocyte (CL0019029)

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Nodes (Genes):
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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 [centrilobular region hepatocyte](/details-cell/CL0019029) is a specialized epithelial cell type located in the liver lobule, defined by its central role in biotransformation and metabolism. The gene significance profile for this cell, from an **Overall** perspective, strongly underscores its identity as a metabolic powerhouse and a primary source of essential plasma proteins. The highest cell-specificity index ([CSI](/details-gene/undefined)) is attributed to [NEAT1](/details-gene/283131), a long non-coding RNA, suggesting that the unique functional state of these hepatocytes is maintained through complex layers of post-transcriptional and structural gene regulation. This is complemented by the high specificity of genes central to the urea cycle ([CPS1](/details-gene/1373)), bile acid conjugation ([BAAT](/details-gene/136881)), and the synthesis of complement ([C9](/details-gene/735)) and coagulation factors ([FGA](/details-gene/2243)), solidifying its role as a key player in systemic homeostasis. ## Key Characteristics and Function Analysis of the top marker genes, based on expression specificity (`csi_z`), reveals several core functional axes that define the [centrilobular region hepatocyte](/details-cell/CL0019029). * **Metabolic Hub for Detoxification and Biosynthesis:** This cell type is characterized by a suite of highly specific metabolic enzymes. The prominence of [CPS1](/details-gene/1373) (CSI 19.80) highlights its critical role in the urea cycle for ammonia detoxification. Similarly, the high specificity of [BAAT](/details-gene/136881) (CSI 16.24) underscores its function in conjugating bile acids, a process essential for lipid digestion and the excretion of waste products. The cell's involvement in amino acid catabolism is marked by [HGD](/details-gene/3081) (tyrosine metabolism) and [TDO2](/details-gene/6999) (tryptophan metabolism). Furthermore, tight regulation of polyamine metabolism, crucial for cellular processes, is suggested by the high scores for both [SAT1](/details-e-gene/6303) and [OAZ1](/details-gene/4946). The high energy demands of these processes are supported by the specific expression of mitochondrial genes involved in oxidative phosphorylation, such as [ND1](/details-gene/4535) and [COX6A1](/details-gene/1337). * **Central Factory for Plasma Proteins:** The data strongly support the hepatocyte's role in synthesizing and secreting key components of plasma. The exceptional specificity of [C9](/details-gene/735) (CSI 38.33), the terminal component of the complement cascade, points to the liver as a primary site for producing proteins of the innate immune system. In parallel, the high CSI scores for [FGA](/details-gene/2243) and [F12](/details-gene/2161) confirm its indispensable function in producing coagulation factors essential for hemostasis. * **Specialized Gene Regulatory Architecture:** The top-ranking marker, [NEAT1](/details-gene/283131) (CSI 42.49), is a nuclear long non-coding RNA that forms the structural core of paraspeckles. Its extreme specificity suggests that the unique transcriptional program of centrilobular hepatocytes is actively maintained through the spatial organization of the nucleus and post-transcriptional regulation. This is further supported by the specific expression of RNA-binding proteins like [HNRNPA2B1](/details-gene/3181) and [RBM39](/details-gene/9584). * **Defining by Absence (Anti-Markers):** The relatively low or negative CSI scores for ubiquitously expressed genes involved in cell cycle progression and general transcription, such as [FOS](/details-gene/2353) and [HNRNPU](/details-gene/3192), are consistent with a terminally differentiated and metabolically active, rather than a highly proliferative, cellular state. ## Clinical Significance and Contextual Roles The gene profile of the [centrilobular region hepatocyte](/details-cell/CL0019029) directly implicates it in numerous human diseases, reflecting its central position in systemic health. * **Inborn Errors of Metabolism:** The high specificity of several genes linked to metabolic disorders highlights the cell's clinical relevance. For instance, mutations in [CPS1](/details-gene/1373) are known to cause life-threatening hyperammonemia ([Link](https://pubmed.ncbi.nlm.nih.gov/1840546/)), while defects in [HGD](/details-gene/3081) lead to alkaptonuria ([Link](https://doi.org/10.1038/ng0996-19)). This positions the centrilobular hepatocyte as the primary site of pathology for these conditions. * **Liver Disease and Steatosis:** The specific expression of [PNPLA3](/details-gene/80339) (CSI 13.90) is particularly significant. Genetic variants in [PNPLA3](/details-gene/80339) are strongly associated with the entire spectrum of non-alcoholic fatty liver disease (NAFLD), from simple steatosis to cirrhosis. Its status as a specific marker suggests that lipid dysregulation within this cell type is a key initiating event in common liver diseases. * **Systemic Immunity and Coagulation Disorders:** As a major producer of complement and coagulation factors, dysfunction of these cells can have profound systemic consequences. Liver failure often leads to coagulopathy and an increased risk of infection, which can be directly attributed to the reduced synthesis of proteins like [FGA](/details-gene/2243), [F12](/details-gene/2161), and [C9](/details-gene/735). The specific expression of macrophage migration inhibitory factor ([MIF](/details-gene/4282)) also points to a role in modulating inflammatory responses. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The long non-coding RNA [NEAT1](/details-gene/283131) functions as a master architectural regulator in [centrilobular region hepatocyte](/details-cell/CL0019029), organizing nuclear paraspeckles that sequester specific RNA-binding proteins and transcription factors. This scaffolding is proposed to be essential for maintaining the high-level, stable expression of the cell's characteristic metabolic and secretory gene programs. * **Surprising Findings:** It is notable that a structural non-coding RNA, rather than a classical protein transcription factor, emerges as the single most specific gene marker. This implies that higher-order nuclear organization is a dominant mechanism defining the identity of this highly specialized, terminally differentiated cell. * **Testable Questions:** Does antisense-mediated knockdown of [NEAT1](/details-gene/283131) in a human liver organoid model disrupt paraspeckle formation and lead to a significant reduction in the expression of other top hepatocyte markers like [CPS1](/details-gene/1373) and [C9](/details-gene/735)? 2. **Hypothesis:** The [centrilobular region hepatocyte](/details-cell/CL0019029) acts as a sentinel that integrates metabolic state with innate immune readiness. The constitutively high and specific expression of the terminal complement component [C9](/details-gene/735) may provide a localized, pre-emptive barrier against pathogens entering via the portal circulation. It is hypothesized that metabolic stress, such as lipid accumulation associated with [PNPLA3](/details-gene/80339) function, directly dysregulates complement protein synthesis, providing a mechanistic link between steatosis and increased susceptibility to liver inflammation (steatohepatitis). * **Surprising Findings:** The co-dominance of a terminal innate immunity effector ([C9](/details-gene/735)) and core metabolic enzymes ([CPS1](/details-gene/1373), [HGD](/details-gene/3081)) as defining markers is unexpected. It suggests that immune surveillance is not a secondary or inducible function but is as fundamental to the cell's baseline identity as its metabolic roles. * **Testable Questions:** In primary human hepatocytes cultured under lipotoxic conditions, is the synthesis and secretion of [C9](/details-gene/735) protein altered? Furthermore, does siRNA-mediated silencing of [PNPLA3](/details-gene/80339) modulate this response to lipid overload?