Details for: CL0002193

Cell ID: CL0002193

Cell Name: myelocyte

Description: A cell type that is the first of the maturation stages of the granulocytic leukocytes normally found in the bone marrow. Granules are seen in the cytoplasm. The nuclear material of the myelocyte is denser than that of the myeloblast but lacks a definable membrane. The cell is flat and contains increasing numbers of granules as maturation progresses.

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 myelocyte 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 myelocyte. 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 myelocyte. 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 myelocyte. 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:  myelocyte (CL0002193)

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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 [myelocyte](/details-cell/CL0002193) is a key developmental stage of granulocytic leukocytes, typically found in the bone marrow. It is characterized by the initial appearance and accumulation of cytoplasmic granules and represents a transition from the myeloblast to the more mature metamyelocyte. The gene significance profile of the [myelocyte](/details-cell/CL0002193) is dominated by genes involved in fundamental cellular processes, including protein synthesis, energy metabolism, and cytoskeletal organization. The high expression specificity, indicated by the Z-score based Cell Significance Index (CSI), for genes such as [`TPT1`](/details-gene/7178) and [`GAPDH`](/details-gene/2597) suggests that these cells are in a state of intense biosynthetic activity, which is consistent with their primary function of producing and packaging the protein-rich contents of their characteristic granules. ## Key Characteristics and Function Analysis of the top marker genes for the [myelocyte](/details-cell/CL0002193) reveals several core functional themes that define its biological state. * **Intense Metabolic Activity:** A prominent feature is the high specificity of genes related to energy production. This includes the glycolytic enzyme [`GAPDH`](/details-gene/2597) (CSI: 14.16) and a large number of genes encoding components of the mitochondrial respiratory chain, such as [`ATP5F1E`](/details-gene/514), [`COX4I1`](/details-gene/1327), [`ATP5MC2`](/details-gene/517), [`COX1`](/details-gene/4512), and [`COX7C`](/details-gene/904). This metabolic signature underscores the immense energetic demand required for the synthesis of granular proteins and cellular proliferation during granulopoiesis. * **Robust Protein Synthesis and Regulation:** The cell's role in granule formation is supported by the high specificity of genes integral to protein production and management. Top markers include [`TPT1`](/details-gene/7178) (CSI: 15.41), a translationally controlled tumor protein, [`PABPC1`](/details-gene/26986), which is involved in mRNA stability, and [`EEF1B2`](/details-gene/1933), a translation elongation factor. Additionally, [`OAZ1`](/details-gene/4946) is involved in regulating polyamine biosynthesis, a process crucial for cell growth and proliferation. * **Cytoskeletal Dynamics:** High CSI scores for genes like [`CFL1`](/details-gene/1072) (Cofilin 1) and [`MYL6`](/details-gene/4637) (Myosin Light Chain 6) indicate active cytoskeletal remodeling. This is consistent with a cell that is undergoing morphological changes, proliferation (cytokinesis), and potentially migration within the bone marrow microenvironment. * **Innate Immune Priming:** Although a precursor cell, the [myelocyte](/details-cell/CL0002193) expresses several genes associated with mature immune function. [`MNDA`](/details-gene/4332) (Myeloid Cell Nuclear Differentiation Antigen), [`B2M`](/details-gene/567) (Beta-2-Microglobulin), the damage-associated molecular pattern (DAMP) molecule [`HMGB1`](/details-gene/3146), the inflammatory S100 protein [`S100A6`](/details-gene/6277), and the adipokine [`RETN`](/details-gene/56729) (Resistin) are all highly specific markers. This suggests that the molecular machinery for inflammatory and immune responses is established early in granulocyte development. The high specificity of [`FTL`](/details-gene/2512) (Ferritin Light Chain) also points to a critical role for iron management, vital for both metabolism and host defense. **Overall**, the gene expression profile depicts the [myelocyte](/details-cell/CL0002193) as a highly active biosynthetic factory, dedicating significant resources to energy production and protein synthesis to fulfill its developmental program of granule formation, while simultaneously being primed with key components of the innate immune system. ## Clinical Significance and Contextual Roles The gene signature of the [myelocyte](/details-cell/CL0002193) provides insights into its role in hematopoiesis and its potential involvement in disease. The profound reliance on core metabolic and protein synthesis pathways suggests that disruptions in these fundamental processes could severely impair granulopoiesis, potentially leading to neutropenia or other myeloid disorders. Several top marker genes have direct clinical relevance. [`HMGB1`](/details-gene/3146) is a well-established alarmin released during cell death that can drive sterile inflammation and is implicated in the pathogenesis of sepsis and autoimmune diseases. Its high specificity at the [myelocyte](/details-cell/CL0002193) stage may indicate an intracellular role during development or that these precursors are a significant source of HMGB1 in bone marrow pathologies. Similarly, [`RETN`](/details-gene/56729) (Resistin) and [`S100A6`](/details-gene/6277) are linked to inflammatory states and various cancers. The specific expression of [`MNDA`](/details-gene/4332), an interferon-inducible nuclear protein, highlights a readiness to respond to inflammatory signals even at this intermediate stage of differentiation ([Link](https://pubmed.ncbi.nlm.nih.gov/1377701/)). Dysregulation of these pre-loaded inflammatory molecules in myelocytic leukemias could contribute to the systemic inflammatory symptoms often associated with the disease. The prominence of genes essential for cellular bioenergetics, like [`GAPDH`](/details-gene/2597) and mitochondrial components, suggests that metabolic-targeted therapies, currently explored in oncology, could have a substantial impact on both normal and malignant myelopoiesis. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The high expression specificity (`csi_z`) of numerous "housekeeping" genes involved in metabolism and protein synthesis suggests that these pathways are not merely active but are uniquely regulated and configured in [myelocytes](/details-cell/CL0002193) to specifically support the massive biosynthetic demands of granulogenesis. This implies a state of "metabolic specialization" rather than general metabolic upregulation. * **Surprising Findings:** It is unexpected that canonical housekeeping genes like [`GAPDH`](/details-gene/2597) and [`TPT1`](/details-gene/7178) emerge as the most specific markers. This challenges their universal role and suggests they may be under specialized transcriptional or post-transcriptional control in this lineage, serving as rate-limiting factors for granulocyte maturation. * **Testable Questions:** How do the activities of key metabolic pathways (e.g., glycolysis vs. oxidative phosphorylation) change during the transition from myeloblast to [myelocyte](/details-cell/CL0002193) to metamyelocyte? Are there specific isoforms or post-translational modifications of these metabolic enzymes that are unique to the [myelocyte](/details-cell/CL0002193) stage? 2. **Hypothesis:** [Myelocytes](/details-cell/CL0002193) are programmed with a suite of inflammatory mediators like [`HMGB1`](/details-gene/3146), [`S100A6`](/details-gene/6277), and [`RETN`](/details-gene/56729) not for immediate effector function, but as a mechanism for regulating their own differentiation and interaction with the bone marrow niche. These molecules may act in an intracrine or autocrine/paracrine fashion to control the pace and fidelity of granulopoiesis. * **Surprising Findings:** The identification of [`RETN`](/details-gene/56729) (Resistin), a hormone primarily studied in the context of obesity and insulin resistance, as a highly specific marker for this bone marrow precursor is notable. Its role within the hematopoietic microenvironment is poorly understood and suggests a previously unappreciated link between systemic metabolism and basal granulocyte production. * **Testable Questions:** Does the addition of recombinant HMGB1, S100A6, or Resistin to in vitro cultures of hematopoietic stem and progenitor cells alter their differentiation trajectory towards or away from the granulocytic lineage? Does genetic knockout of these factors in a mouse model lead to defects in steady-state granulopoiesis?