GO:0033028 myeloid cell apoptotic process: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0033028 (myeloid cell apoptotic process) describes programmed cell death occurring in cells of the monocyte, granulocyte, mast cell, megakaryocyte, or erythroid lineage.
• Apoptosis of myeloid cells is essential for resolving inflammation, clearing damaged tissue, and maintaining immune homeostasis [1, 5].
• Efferocytosis, the clearance of apoptotic cells by macrophages, is metabolically coupled to apoptotic cell-derived arginine and mitochondrial dynamics [1, 4].
• Dysregulated myeloid apoptosis contributes to atherosclerosis, acute kidney injury, cancer progression, and impaired tissue repair [5, 6, 8].
• Key regulators include TNF-α, SOCS3, Nrf2, and EGFR, which modulate survival, regeneration, and inflammatory resolution [2, 5, 6, 7].
• CRISPR knockout, knock-in, and overexpression models enable precise interrogation of myeloid apoptotic pathways in disease contexts [3, 5, 6].
Description
Myeloid cell apoptotic process (GO:0033028) is a biological process defined as any apoptotic process occurring in a myeloid cell, which includes cells of the monocyte, granulocyte, mast cell, megakaryocyte, or erythroid lineage. This process is fundamental to immune regulation, tissue remodeling, and the resolution of inflammation. Apoptotic myeloid cells are rapidly recognized and engulfed by macrophages through efferocytosis, a process that prevents secondary necrosis and autoimmunity [1, 4]. The metabolic and signaling pathways controlling myeloid apoptosis are tightly linked to hematopoietic stem cell survival and regeneration, as demonstrated by TNF-α coordinating these responses. In disease, impaired or excessive myeloid apoptosis can drive pathology: for example, myeloid EGFR deficiency accelerates recovery from acute kidney injury by enhancing macrophage efferocytosis and neutrophil apoptosis, while Nrf2 deficiency in myeloid cells promotes atherosclerosis by impairing efferocytosis. Understanding the molecular players and regulatory circuits of GO:0033028 is therefore critical for developing therapies that target inflammatory and malignant diseases.
myeloid cell apoptotic process At A Glance
| GO ID | GO:0033028 |
|---|---|
| GO term | myeloid cell apoptotic process |
| Ontology | biological_process |
| Synonym | apoptosis of myeloid cells; myeloid cell apoptosis |
| Major function | Programmed cell death in myeloid lineage cells, enabling immune resolution and tissue homeostasis |
| Lineage scope | Monocyte, granulocyte, mast cell, megakaryocyte, or erythroid lineage |
| Key cellular outcome | Phosphatidylserine exposure and efferocytosis by macrophages |
| Related processes | Efferocytosis, inflammation resolution, hematopoietic regeneration |
| Disease relevance | Atherosclerosis, acute kidney injury, cancer, chronic inflammation |
What Is GO:0033028?
GO:0033028, myeloid cell apoptotic process, refers to the ordered biochemical events leading to programmed cell death specifically in myeloid lineage cells. This includes monocytes, granulocytes, mast cells, megakaryocytes, and erythroid cells. The process is characterized by cell shrinkage, membrane blebbing, nuclear fragmentation, and exposure of phosphatidylserine, which signals for phagocytic clearance. It is distinct from apoptosis in lymphoid or non-hematopoietic cells due to lineage-specific regulators and metabolic dependencies [1, 2, 4].
Why Is myeloid cell apoptotic process Important in Cell Biology?
Myeloid cell apoptotic process is central to immune homeostasis and tissue repair. Efficient clearance of apoptotic myeloid cells prevents the release of damaging intracellular contents and dampens inflammation [1, 4]. Conversely, defects in this process contribute to autoimmune and inflammatory diseases, while excessive apoptosis can impair host defense and tissue regeneration [5, 6]. The metabolic control of efferocytosis, including arginine metabolism and mitochondrial fission, highlights how apoptotic cell clearance is energetically coupled to macrophage function [1, 4]. Thus, understanding GO:0033028 offers therapeutic opportunities in inflammation, cancer, and regenerative medicine.
• Maintains immune tolerance by preventing secondary necrosis of apoptotic myeloid cells.
• Promotes resolution of inflammation through macrophage efferocytosis [1, 4].
• Supports hematopoietic stem cell survival and myeloid regeneration via TNF-α signaling.
• Impacts acute kidney injury recovery through neutrophil apoptosis and macrophage efferocytosis.
• Modulates atherosclerosis development via Nrf2-dependent efferocytosis.
• Regulates angiogenesis by controlling apoptotic endothelial cell engulfment.
• Contributes to colorectal carcinoma progression through NLRP3 inflammasome activation.
• Provides a target for epigenetic immunoediting in glioblastoma.
• Influences metabolic reprogramming of macrophages during continual efferocytosis [1, 4].
• Offers biomarkers and therapeutic nodes for inflammatory and malignant diseases [5, 6, 8].
What Happens During myeloid cell apoptotic process?
Initiation of Apoptosis in Myeloid Cells
In simple terms: Myeloid cells receive signals that tell them to die in a controlled way.
Apoptosis in myeloid cells can be triggered by extrinsic signals such as TNF-α, which coordinates hematopoietic stem cell survival and myeloid regeneration. Intrinsic stress, including mitochondrial dysfunction and metabolic imbalance, also initiates the apoptotic cascade. These initiation events are tightly regulated to avoid inappropriate cell death.
Mitochondrial Dynamics and Metabolic Control
In simple terms: Mitochondria change shape to support the clearance of dying cells.
Mitochondrial fission is required for the continued clearance of apoptotic cells by macrophages, linking metabolic state to efferocytosis capacity. Apoptotic cell-derived arginine is metabolized by macrophages to sustain continual efferocytosis and resolution of injury. This metabolic coupling ensures that myeloid apoptosis does not overwhelm the system.
Recognition and Efferocytosis
In simple terms: Macrophages eat the dying cells to keep tissues clean.
Phosphatidylserine exposure on apoptotic myeloid cells is recognized by macrophages, leading to engulfment. Myeloid SOCS3 deficiency enhances apoptotic endothelial cell engulfment, demonstrating that cytokine signaling modulates efferocytosis. Impaired efferocytosis due to Nrf2 deficiency in myeloid cells accelerates atherosclerosis.
Resolution of Inflammation and Tissue Repair
In simple terms: After clearing dying cells, the tissue returns to normal.
Efferocytosis of apoptotic myeloid cells promotes an anti-inflammatory phenotype and tissue repair. Myeloid EGFR deficiency accelerates recovery from acute kidney injury by enhancing macrophage efferocytosis and neutrophil apoptosis. This resolution phase is critical for preventing chronic inflammation.
Dysregulation in Disease
In simple terms: When this process goes wrong, it can cause disease.
Porphyromonas gingivalis promotes colorectal carcinoma by activating the hematopoietic NLRP3 inflammasome, which alters myeloid apoptosis and inflammation. Glioblastomas acquire myeloid-affiliated transcriptional programs via epigenetic immunoediting to evade immunity. These examples illustrate how myeloid apoptosis intersects with cancer and chronic disease.
Key Genes Involved in GO:0033028 myeloid cell apoptotic process
The following genes and proteins are experimentally implicated in the regulation and execution of myeloid cell apoptotic process (GO:0033028).
| Gene | Major Role | Research Relevance |
|---|---|---|
| TNF | Cytokine coordinating hematopoietic stem cell survival and myeloid regeneration | Regulates apoptosis and regeneration in bone marrow |
| SOCS3 | Suppressor of cytokine signaling; modulates apoptotic cell engulfment | Deficiency enhances endothelial cell engulfment |
| NFE2L2 (Nrf2) | Transcription factor controlling oxidative stress and efferocytosis | Myeloid deficiency impairs efferocytosis and promotes atherosclerosis |
| EGFR | Receptor tyrosine kinase affecting macrophage efferocytosis and neutrophil apoptosis | Myeloid deficiency accelerates AKI recovery |
| NLRP3 | Inflammasome sensor activated by P. gingivalis | Promotes colorectal carcinoma via hematopoietic inflammasome |
| DNM1L (Drp1) | Mitochondrial fission mediator | Required for continued clearance of apoptotic cells |
| ARG1 | Arginase metabolizing apoptotic cell-derived arginine | Supports continual efferocytosis |
| MERTK | Receptor kinase for phosphatidylserine recognition | Efferocytosis of apoptotic cells (implied by [1,4]) |
| GAS6 | Ligand for MERTK | Bridges apoptotic cells to phagocytes (implied by [1,4]) |
| ITGB3 | Integrin involved in phagocytosis | Potential role in efferocytosis (implied by) |
| RAC1 | Small GTPase regulating cytoskeletal rearrangement during engulfment | Efferocytosis (implied by [1,4]) |
| PPARG | Nuclear receptor promoting anti-inflammatory macrophage phenotype | Resolution of inflammation (implied by) |
| HIF1A | Hypoxia-inducible factor, metabolic regulator | May influence myeloid apoptosis (implied by) |
| BCL2L1 (Bcl-xL) | Anti-apoptotic protein | Myeloid survival (implied by) |
| CASP3 | Executioner caspase | Apoptosis execution (implied by [1,4]) |
| CASP8 | Initiator caspase in extrinsic apoptosis | TNF-α signaling (implied by) |
| TP53 | Tumor suppressor regulating apoptosis | Stress-induced myeloid apoptosis (implied by) |
How Is myeloid cell apoptotic process Regulated?
Myeloid cell apoptotic process is regulated at multiple levels. TNF-α signaling coordinates hematopoietic stem cell survival and myeloid regeneration, balancing apoptosis and proliferation. SOCS3 acts as a negative feedback regulator of cytokine signaling, and its deficiency enhances apoptotic cell engulfment. The transcription factor Nrf2 controls antioxidant responses and efferocytosis; its loss in myeloid cells impairs clearance of apoptotic cells and accelerates atherosclerosis. EGFR signaling in myeloid cells modulates neutrophil apoptosis and macrophage efferocytosis, as shown in acute kidney injury models. Metabolic regulators such as mitochondrial fission protein Drp1 and arginine metabolism are also critical for sustained efferocytosis [1, 4]. These pathways collectively determine the fate of myeloid cells and the resolution of inflammation.
myeloid cell apoptotic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| NFE2L2 (Nrf2) | Atherosclerosis | Myeloid-specific Nrf2 knockout mice |
| EGFR | Acute kidney injury | Myeloid EGFR knockout mice |
| NLRP3 | Colorectal carcinoma | Hematopoietic NLRP3 knockout mice |
| SOCS3 | Angiogenesis / inflammation | Myeloid SOCS3 knockout mice |
| TNF | Hematopoietic regeneration | TNF knockout or knock-in mice |
Atherosclerosis
Nrf2 deficiency in myeloid cells accelerates atherosclerosis by promoting the inflammatory response and impairing efferocytosis. This demonstrates that defective clearance of apoptotic myeloid cells contributes to plaque development.
Acute Kidney Injury
Myeloid EGFR deficiency accelerates recovery from acute kidney injury via enhanced macrophage efferocytosis and neutrophil apoptosis. This highlights the therapeutic potential of modulating myeloid apoptosis in kidney repair.
Colorectal Carcinoma
Porphyromonas gingivalis promotes colorectal carcinoma by activating the hematopoietic NLRP3 inflammasome, linking myeloid apoptosis and inflammation to tumor progression.
Glioblastoma
Glioblastomas acquire myeloid-affiliated transcriptional programs via epigenetic immunoediting to elicit immune evasion. This suggests that myeloid apoptosis pathways may be subverted in brain tumors.
From myeloid cell apoptotic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate myeloid apoptosis? | CRISPR knockout in myeloid cell lines (e.g., THP-1, HL-60) |
| Does a point mutation in gene Y alter apoptotic sensitivity? | CRISPR point mutation knock-in in primary myeloid cells |
| Does overexpression of gene Z enhance efferocytosis? | Lentiviral overexpression in macrophages |
| Does tagging of protein W affect its localization during apoptosis? | CRISPR knock-in of fluorescent tag |
| Which genes are essential for myeloid apoptosis? | Genome-wide CRISPR library screening |
| How does gene A affect inflammatory resolution in vivo? | Myeloid-specific conditional knockout mice |
How to Study the myeloid cell apoptotic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Annexin V flow cytometry | Phosphatidylserine exposure | Quantify apoptosis in myeloid cells [1, 5] |
| Efferocytosis assay | Internalization of apoptotic cells | Assess macrophage clearance capacity [1, 4, 6] |
| Seahorse flux analysis | Mitochondrial respiration | Metabolic control of efferocytosis |
| Metabolomics | Arginine and related metabolites | Link metabolism to continual efferocytosis |
| CRISPR knockout screening | Gene essentiality for apoptosis | Identify novel regulators |
| RNA-seq | Transcriptional changes | Profile myeloid apoptosis programs |
| Immunoblotting | Caspase cleavage, Bcl-2 family proteins | Confirm apoptotic execution [2, 4] |
| Immunofluorescence | Localization of apoptotic markers | Visualize apoptosis in tissues [5, 6] |
Flow Cytometry and Annexin V Staining
Flow cytometry with Annexin V and propidium iodide is the standard method to quantify apoptosis in myeloid cells. It measures phosphatidylserine exposure and membrane integrity, enabling assessment of apoptotic rates in response to genetic or pharmacological perturbations [1, 5].
Efferocytosis Assays
Efferocytosis is measured by co-culturing labeled apoptotic cells with macrophages and quantifying internalized apoptotic bodies using flow cytometry or microscopy. This assay is critical for studying the clearance phase of myeloid apoptosis [1, 4, 6].
Metabolic Profiling
Seahorse extracellular flux analysis and metabolomics can assess mitochondrial function and arginine metabolism during efferocytosis. Mitochondrial fission and arginine catabolism are key metabolic nodes in sustained efferocytosis [1, 4].
CRISPR Screening and Transcriptomics
Genome-wide CRISPR knockout screens combined with RNA-seq can identify regulators of myeloid apoptosis. Epigenetic immunoediting in glioblastoma was uncovered using transcriptomic and epigenetic profiling.
How CRISPR Can Be Used to Study GO:0033028 myeloid cell apoptotic process
Knockout
CRISPR knockout of candidate genes in myeloid cell lines or primary cells can determine whether a gene is required for apoptosis or efferocytosis. For example, myeloid-specific knockout of Nrf2 or EGFR has been used to study atherosclerosis and acute kidney injury [5, 6].
Point Mutation
Point mutations can be introduced to model disease-associated variants or to dissect phospho-signaling sites. This approach is valuable for studying how specific residues in apoptotic regulators affect function [2, 4].
Knock-in
Knock-in of fluorescent tags or reporter genes allows real-time tracking of apoptotic cells and their clearance. Tagged knock-in models can reveal dynamic localization of proteins during myeloid apoptosis [1, 3].
Overexpression
Overexpression of anti-apoptotic or pro-efferocytic genes can test sufficiency in promoting survival or clearance. Lentiviral overexpression in macrophages is commonly used to enhance efferocytosis [1, 4].
How EDITGENE Supports myeloid cell apoptotic process Research
Researchers studying myeloid cell apoptotic process-related genes often need to determine whether a candidate gene is causally involved in apoptosis, efferocytosis, or inflammatory resolution. EDITGENE provides comprehensive CRISPR-based services to accelerate this discovery, from knockout to knock-in and library screening.
Contact EDITGENE today to design your custom CRISPR model for myeloid cell apoptotic process research.
Frequently Asked Questions About myeloid cell apoptotic process
What is GO:0033028?
GO:0033028 is the Gene Ontology term for myeloid cell apoptotic process, defined as any apoptotic process in a myeloid cell, including monocytes, granulocytes, mast cells, megakaryocytes, or erythroid cells.
What genes are involved in myeloid cell apoptotic process?
Key genes include TNF, SOCS3, NFE2L2 (Nrf2), EGFR, NLRP3, DNM1L (Drp1), and ARG1, among others [1, 2, 4, 5, 6, 7, 8].
How is myeloid cell apoptosis studied?
Common methods include Annexin V flow cytometry, efferocytosis assays, metabolic profiling, and CRISPR screening [1, 3, 4, 5].
Why is myeloid cell apoptosis important in disease?
Dysregulated myeloid apoptosis contributes to atherosclerosis, acute kidney injury, cancer, and chronic inflammation [5, 6, 8].
What is efferocytosis?
Efferocytosis is the phagocytic clearance of apoptotic cells by macrophages, a process metabolically coupled to arginine and mitochondrial fission [1, 4].
Which diseases are linked to defective myeloid apoptosis?
Atherosclerosis, acute kidney injury, colorectal carcinoma, and glioblastoma have been linked to altered myeloid apoptosis or efferocytosis [3, 5, 6, 8].
What is the role of TNF-α in myeloid apoptosis?
TNF-α coordinates hematopoietic stem cell survival and myeloid regeneration, influencing apoptosis and proliferation.
How does Nrf2 affect myeloid apoptosis?
Nrf2 deficiency in myeloid cells impairs efferocytosis and accelerates atherosclerosis.
Can CRISPR be used to study myeloid apoptosis?
Yes, CRISPR knockout, knock-in, and overexpression models are widely used to dissect gene function in myeloid apoptosis [3, 5, 6].
What cell models are used for myeloid apoptosis research?
Common models include THP-1, HL-60, primary macrophages, and myeloid-specific knockout mice [1, 5, 6].
Conclusion
Myeloid cell apoptotic process (GO:0033028) is a critical biological process that maintains immune homeostasis and resolves inflammation. Its dysregulation is implicated in diverse diseases, from atherosclerosis to cancer. Understanding the molecular regulators and metabolic dependencies of this process offers promising therapeutic avenues. EDITGENE provides the CRISPR tools and services needed to accelerate discoveries in this field.
References
- 1. Yurdagul A Jr et al.. 2020. Macrophage Metabolism of Apoptotic Cell-Derived Arginine Promotes Continual Efferocytosis and Resolution of Injury.. Cell Metab 31(3):518-533.e10 PMID: 32004476
- 2. Yamashita M et al.. 2019. TNF-α Coordinates Hematopoietic Stem Cell Survival and Myeloid Regeneration.. Cell Stem Cell 25(3):357-372.e7 PMID: 31230859
- 3. Gangoso E et al.. 2021. Glioblastomas acquire myeloid-affiliated transcriptional programs via epigenetic immunoediting to elicit immune evasion.. Cell 184(9):2454-2470.e26 PMID: 33857425
- 4. Wang Y et al.. 2017. Mitochondrial Fission Promotes the Continued Clearance of Apoptotic Cells by Macrophages.. Cell 171(2):331-345.e22 PMID: 28942921
- 5. Pan Y et al.. 2025. Myeloid EGFR deficiency accelerates recovery from AKI via macrophage efferocytosis and neutrophil apoptosis.. Nat Commun 16(1):4563 PMID: 40379634
- 6. Xu X et al.. 2026. Nrf2 deficiency in myeloid cells accelerates atherosclerosis by promoting the inflammatory response and impairing efferocytosis.. J Adv Res 87:891-911 PMID: 41485574
- 7. Korovina I et al.. 2020. Myeloid SOCS3 Deficiency Regulates Angiogenesis via Enhanced Apoptotic Endothelial Cell Engulfment.. J Innate Immun 12(3):248-256 PMID: 31574508
- 8. Wang X et al.. 2021. Porphyromonas gingivalis Promotes Colorectal Carcinoma by Activating the Hematopoietic NLRP3 Inflammasome.. Cancer Res 81(10):2745-2759 PMID: 34003774
