Details for: CL0001069

Cell ID: CL0001069

Cell Name: group 2 innate lymphoid cell

Description: An innate lymphoid cell that is capable of producing T-helper 2-cell associated cytokines upon stimulation.

Synonyms: ILC2, natural helper cell, nuocyte

Selected Context(s): Overall

Gene Significance Landscape

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Score:
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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 group 2 innate lymphoid 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 group 2 innate lymphoid 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 group 2 innate lymphoid 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 group 2 innate lymphoid 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:  group 2 innate lymphoid cell (CL0001069)

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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.

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## Summary The [group 2 innate lymphoid cell](/details-cell/CL0001069) (ILC2) is defined as an innate lymphocyte central to type 2 immunity, capable of producing cytokines typically associated with T-helper 2 cells. The provided gene significance profile, based on expression specificity (**Overall** context), paints a picture of a cell that is not only defined by its immune potential but also by a remarkably distinct and highly active core cellular machinery. The top markers are dominated by genes involved in fundamental processes such as energy metabolism, protein synthesis, and cytoskeletal organization, suggesting that a state of heightened metabolic and biosynthetic readiness is a core, identifying feature of this cell type. ## Key Characteristics and Function Analysis of the most specific gene markers ([csi_z](/details-gene/3021)) for [group 2 innate lymphoid cells](/details-cell/CL0001069) reveals a strong signature of high-level cellular activity, which can be organized into several functional themes: * **High Metabolic Activity:** A prominent cluster of top markers is associated with cellular energy production. This includes the key glycolytic enzyme [GAPDH](/details-gene/2597) and several subunits of the mitochondrial respiratory chain, such as [ATP5MC2](/details-gene/517), [COX7C](/details-gene/1350), and [COX4I1](/details-gene/1327). The unusual specificity of these genes suggests that [ILC2s](/details-cell/CL0001069) maintain a high state of metabolic preparedness, potentially to fuel rapid activation and effector functions like cytokine synthesis upon stimulation. * **Protein Synthesis and Stability:** Genes involved in translation and protein management are highly specific markers. These include the translationally controlled tumor protein [TPT1](/details-gene/7178), elongation factor [EEF1D](/details-gene/1936), and the ubiquitin gene [UBB](/details-gene/7314). The high specificity of ferritin subunits [FTH1](/details-gene/2495) and [FTL](/details-gene/2512) may indicate specialized iron metabolism to support these highly energetic processes. Furthermore, the presence of [ZFP36](/details-gene/7538), an RNA-binding protein that promotes mRNA degradation, suggests that post-transcriptional regulation is a key mechanism for controlling protein expression. * **Cytoskeletal Dynamics:** A significant number of markers are involved in the cytoskeleton, including myosin light chains ([MYL6](/details-gene/4637), [MYL12A](/details-gene/10627)) and the actin-depolymerizing factor [CFL1](/details-gene/1072). This profile indicates a state of active cytoskeletal remodeling, consistent with a cell that must be motile within tissues to perform its surveillance and effector functions. * **Immune and Stress Response:** While classic ILC2 effector genes are not the top markers by specificity, key immunomodulatory molecules are present. [B2M](/details-gene/567) is essential for MHC class I presentation, and [HMGB1](/details-gene/3146) and [MIF](/details-gene/4282) are well-known alarmins and pro-inflammatory mediators. Their specific expression underscores the role of [ILC2s](/details-cell/CL0001069) as tissue-resident sentinel cells that can both sense and contribute to inflammatory environments. Conversely, the anti-marker list provides clear evidence of what this cell is not. The low significance of genes associated with the adaptive immune system, such as T-cell receptor components ([CD3G](/details-gene/917)), T-cell transcription factors ([LEF1](/details-gene/51176)), and co-stimulatory molecules ([IL2RA](/details-gene/3559), [CD83](/details-gene/9308), [TNFSF9](/details-gene/8744)), firmly distinguishes [ILC2s](/details-cell/CL0001069) from T-lymphocyte lineages. Similarly, the lack of specific expression for myeloid chemokines like [CXCL2](/details-gene/2920) reinforces its distinct lymphoid origin. ## Clinical Significance and Contextual Roles As the data is presented in an **Overall** context, it likely reflects the basal state of [group 2 innate lymphoid cells](/details-cell/CL0001069). The gene signature suggests these cells are maintained in a "poised" state, ready for immediate action. This has significant clinical implications, particularly in the context of allergic diseases, asthma, and response to parasitic infections, where [ILC2s](/details-cell/CL0001069) are key early responders. The high specificity of pro-inflammatory DAMPs (Damage-Associated Molecular Patterns) like [HMGB1](/details-gene/3146) and cytokines like [MIF](/details-gene/4282) positions [ILC2s](/details-cell/CL0001069) as critical initiators of tissue inflammation. Dysregulation of these pathways could contribute to the chronic inflammation seen in allergic diseases. Concurrently, the specific expression of [ZFP36](/details-gene/7538), which destabilizes the mRNAs of inflammatory cytokines like [TNF](/details-gene/7124) ([Link](https://pubmed.ncbi.nlm.nih.gov/2062660/)), points to an intrinsic, potent negative feedback loop. This balance between pro-inflammatory potential and tight post-transcriptional control is likely crucial for maintaining tissue homeostasis and preventing excessive immune-mediated pathology. A breakdown in this regulatory control could be a key factor in the transition from a protective to a pathological type 2 immune response. ## Potential Mechanisms and Research Directions 1. **Hypothesis: ILC2s are defined by a "Poised Effector" metabolic state.** The unique specificity of numerous genes involved in core metabolic pathways ([GAPDH](/details-gene/2597), [ATP5MC2](/details-gene/517), [COX4I1](/details-gene/1327)) is not merely reflective of general cellular health but is a defining transcriptomic feature of the [ILC2](/details-cell/CL0001069) lineage. This suggests that [ILC2s](/details-cell/CL0001069) are constitutively maintained in a state of high metabolic readiness, allowing them to rapidly execute their effector program (e.g., massive cytokine production) upon stimulation without the delay required for metabolic reprogramming seen in naive adaptive lymphocytes. * **Surprising Findings:** The most specific markers identifying this immune cell are not conventional immune-related genes (cytokines, receptors, transcription factors) but rather genes of central metabolism and biosynthesis. This challenges the conventional approach of defining immune cell identity and suggests that metabolic phenotype is a primary, rather than secondary, characteristic. * **Testable Questions:** Does the targeted inhibition of glycolysis or oxidative phosphorylation *prior* to stimulation have a more profound inhibitory effect on the initial (<6 hours) cytokine burst from [ILC2s](/details-cell/CL0001069) compared to naive [CD4+ T cells](/details-cell/CL0000492)? 2. **Hypothesis: Post-transcriptional regulation via mRNA stability is a central hub for controlling ILC2 function.** The high specificity of the RNA-binding protein [ZFP36](/details-gene/7538), a key factor in destabilizing inflammatory mRNAs, alongside pro-inflammatory mediators like [MIF](/details-gene/4282), suggests that [ILC2s](/details-cell/CL0001069) finely tune the intensity and duration of their responses primarily at the post-transcriptional level. This mechanism would allow for a rapid onset of cytokine production followed by an equally rapid termination, preventing excessive tissue damage. * **Surprising Findings:** An mRNA *destabilizing* protein, [ZFP36](/details-gene/7538), is among the most specific gene markers for this cell type. This highlights that the machinery for *inhibiting* an immune response is as integral to the cell's core identity as the machinery for initiating it. * **Testable Questions:** Does conditional knockout or siRNA-mediated knockdown of [ZFP36](/details-gene/7538) in [ILC2s](/details-cell/CL0001069) result in exaggerated and prolonged production of type 2 cytokines (e.g., IL-5, IL-13) in a mouse model of allergic airway inflammation?