GO:1904094 positive regulation of autophagic cell death: Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1904094 (positive regulation of autophagic cell death) describes any process that activates or increases the frequency, rate or extent of autophagic cell death, a lysosome-dependent cell death program distinct from apoptosis.
• Autophagic cell death is mechanistically linked to ferroptosis, an iron-dependent lipid peroxidation-driven death process that requires autophagy machinery.
• Key signaling nodes include AMPK/mTOR/ULK-1, VEGFR2/STAT3/PD-L1, ROS/Nrf2/p62, DAP-kinase, TRIM28, OPTN, ACSL4, and NSP6.
• Dysregulation of autophagic cell death contributes to cancer progression, neurodegeneration, rheumatoid arthritis, and calcium overload-induced tissue injury.
• CRISPR knockout, point-mutation, knock-in, and overexpression models are essential to establish causality between candidate genes and autophagic cell death regulation.
• Publication-ready studies of GO:1904094 typically combine CRISPR editing with autophagy flux assays, redox profiling, and bioinformatics screening.
Description
GO:1904094, positive regulation of autophagic cell death, is a Gene Ontology biological process term that captures any process which activates or increases the frequency, rate or extent of autophagic cell death. Autophagic cell death, sometimes called type II programmed cell death or programmed cell death by macroautophagy, is a lysosome-dependent death program that is mechanistically distinct from apoptosis and is increasingly recognized as a critical determinant of cell fate in cancer, neurodegeneration, and inflammatory disease. Because autophagy can either promote survival or trigger death depending on context, understanding the positive regulators of autophagic cell death is essential for interpreting disease mechanisms and for designing targeted therapies. Recent work has established that autophagic cell death is not a single linear pathway but a convergence point for multiple stress-responsive signaling cascades. For example, apatinib triggers autophagic and apoptotic cell death through VEGFR2/STAT3/PD-L1 and ROS/Nrf2/p62 signaling in lung cancer, while shikonin suppresses rheumatoid arthritis by inducing apoptosis and autophagy via modulation of the AMPK/mTOR/ULK-1 signaling pathway. Ferroptosis has been characterized as an autophagic cell death process, linking iron-dependent lipid peroxidation to autophagic machinery. At the molecular level, positive regulation of autophagic cell death involves redox-sensitive proteins such as TRIM28, which facilitates neuronal ferroptosis by promoting SUMOylation and inhibiting OPTN-selective autophagic degradation of ACSL4, and NSP6, which regulates calcium overload-induced autophagic cell death and is itself regulated by KLHL22-mediated ubiquitination. DAP-kinase has also been implicated in the interface between autophagy and cell death. This article synthesizes the authoritative QuickGO definition with real PubMed literature to provide a research-grade overview of GO:1904094, its core genes, regulatory logic, disease relevance, and the CRISPR-based methods used to study it.
positive regulation of autophagic cell death At A Glance
| GO ID | GO:1904094 |
|---|---|
| GO term | positive regulation of autophagic cell death |
| Ontology | biological_process |
| Definition | Any process that activates or increases the frequency, rate or extent of autophagic cell death. |
| Synonyms | activation of autophagic cell death; activation of programmed cell death by macroautophagy; activation of type II programmed cell death; positive regulation of programmed cell death by macroautophagy; positive regulation of type II programmed cell death; up regulation of autophagic cell death; up-regulation of autophagic cell death; upregulation of autophagic cell death; up regulation of programmed cell death by macroautophagy; up-regulation of programmed cell death by macroautophagy; upregulation of programmed cell death by macroautophagy; up regulation of type II programmed cell death; up-regulation of type II programmed cell death; upregulation of type II programmed cell death |
| Major function | Positive regulation of lysosome-dependent cell death driven by macroautophagy and related stress pathways. |
| Related process | Ferroptosis, an iron-dependent autophagic cell death process. |
| Key signaling nodes | AMPK/mTOR/ULK-1, VEGFR2/STAT3/PD-L1, ROS/Nrf2/p62, DAP-kinase, TRIM28/OPTN/ACSL4, NSP6/KLHL22. |
| Disease relevance | Cancer, neurodegeneration, rheumatoid arthritis, calcium overload-induced injury. |
What Is GO:1904094?
According to the Gene Ontology, GO:1904094 (positive regulation of autophagic cell death) is defined as any process that activates or increases the frequency, rate or extent of autophagic cell death. In practical terms, this term annotates gene products and pathways that positively regulate the lysosome-dependent, macroautophagy-associated cell death program, including signaling events that initiate autophagosome formation, promote autophagic flux, and ultimately commit the cell to death.
Why Is positive regulation of autophagic cell death Important in Cell Biology?
GO:1904094 matters because autophagic cell death sits at the intersection of cell survival and cell death decisions, and its positive regulators determine whether stressed cells adapt or die. In cancer, agents such as apatinib exploit this pathway to trigger autophagic and apoptotic cell death through VEGFR2/STAT3/PD-L1 and ROS/Nrf2/p62 signaling. In neurodegeneration, redox regulation of TRIM28 facilitates neuronal ferroptosis by promoting SUMOylation and inhibiting OPTN-selective autophagic degradation of ACSL4. In inflammatory disease, shikonin suppresses rheumatoid arthritis by inducing apoptosis and autophagy via AMPK/mTOR/ULK-1 modulation. Understanding positive regulation of autophagic cell death therefore has direct therapeutic implications across oncology, neuroscience, and immunology.
• Defines a druggable cell death program distinct from apoptosis, relevant to therapy-resistant cancers.
• Links autophagy machinery to ferroptosis, expanding the mechanistic landscape of iron-dependent death.
• Provides mechanistic insight into how ROS/Nrf2/p62 signaling drives autophagic cell death.
• Highlights AMPK/mTOR/ULK-1 as a central regulatory axis for autophagy-mediated death.
• Implicates DAP-kinase in the crosstalk between autophagy and cell death.
• Reveals TRIM28/OPTN/ACSL4 as a redox-sensitive module in neuronal ferroptosis.
• Identifies NSP6 and KLHL22 as regulators of calcium overload-induced autophagic cell death.
• Supports development of CRISPR-based models to test causality of candidate regulators.
• Informs biomarker discovery and bioinformatics screening for autophagic cell death modulators.
• Connects basic autophagy biology to diseases such as cancer, neurodegeneration, and rheumatoid arthritis.
What Happens During positive regulation of autophagic cell death?
Initiation of autophagic signaling
In simple terms: The cell receives a stress signal that tells it to start recycling its own parts.
Positive regulation of autophagic cell death begins with stress-responsive signaling that activates the autophagy machinery. The AMPK/mTOR/ULK-1 axis is a central node: shikonin induces apoptosis and autophagy via modulation of AMPK/mTOR/ULK-1 signaling. In lung cancer, apatinib triggers autophagic and apoptotic cell death through VEGFR2/STAT3/PD-L1 and ROS/Nrf2/p62 signaling. These pathways converge on the initiation of autophagosome formation and commit the cell toward autophagic death.
Autophagosome formation and flux
In simple terms: The cell builds bubble-like structures that engulf damaged components and deliver them to lysosomes.
Once initiated, autophagic cell death requires functional autophagosome formation and autophagic flux. DAP-kinase has been implicated in the interface between autophagy and cell death, supporting the idea that dedicated kinases regulate this step. Ferroptosis has been characterized as an autophagic cell death process, indicating that autophagic flux is required for execution of this death program. Positive regulators at this stage increase the frequency and extent of autophagosome formation and lysosomal delivery.
Redox and iron-dependent execution
In simple terms: Oxidative stress and iron drive the cell past the point of no return.
A major execution mechanism of autophagic cell death involves redox regulation and iron-dependent lipid peroxidation. Ferroptosis is an autophagic cell death process, linking iron metabolism to autophagic execution. Redox regulation of TRIM28 facilitates neuronal ferroptosis by promoting SUMOylation and inhibiting OPTN-selective autophagic degradation of ACSL4. This demonstrates that positive regulation of autophagic cell death can operate through post-translational control of selective autophagy receptors and lipid metabolism enzymes.
Calcium overload and ubiquitin-dependent control
In simple terms: Too much calcium and targeted protein degradation can push cells into autophagic death.
Calcium overload is another trigger of autophagic cell death. NSP6 regulates calcium overload-induced autophagic cell death and is itself regulated by KLHL22-mediated ubiquitination. This illustrates that positive regulation of autophagic cell death can be controlled by ubiquitin-proteasome components that determine the stability of key effectors. Together with redox and iron-dependent mechanisms, calcium and ubiquitin signaling expand the repertoire of positive regulators annotated to GO:1904094.
Key Genes Involved in GO:1904094 positive regulation of autophagic cell death
The following genes and proteins have been experimentally implicated in positive regulation of autophagic cell death or in mechanistically related autophagic death processes.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ULK1 | Core autophagy initiation kinase downstream of AMPK/mTOR | Target for modulating autophagic flux and death |
| AMPK | Energy sensor that activates autophagy and promotes autophagic death | Central regulator in rheumatoid arthritis and cancer models |
| MTOR | Negative regulator of autophagy; its inhibition promotes autophagic death | Key node for pharmacological induction of autophagy |
| VEGFR2 | Receptor tyrosine kinase targeted by apatinib in lung cancer | Upstream driver of autophagic and apoptotic death |
| STAT3 | Transcription factor in VEGFR2/STAT3/PD-L1 signaling | Mediator of apatinib-induced autophagic death |
| PD-L1 | Immune checkpoint protein in VEGFR2/STAT3/PD-L1 axis | Links autophagic death to immune signaling |
| Nrf2 | Redox-sensitive transcription factor in ROS/Nrf2/p62 signaling | Regulates antioxidant and autophagic responses |
| p62 | Selective autophagy receptor in ROS/Nrf2/p62 signaling | Marker and effector of autophagic flux |
| DAP-kinase | Kinase implicated in autophagy and cell death crosstalk | Candidate positive regulator of autophagic death |
| TRIM28 | Redox-regulated E3 ligase component promoting SUMOylation | Facilitates neuronal ferroptosis via OPTN/ACSL4 |
| OPTN | Selective autophagy receptor for ACSL4 degradation | Determines ACSL4 stability and ferroptosis sensitivity |
| ACSL4 | Lipid metabolism enzyme driving ferroptosis | Substrate of OPTN-selective autophagic degradation |
| NSP6 | Regulator of calcium overload-induced autophagic cell death | Effector controlled by KLHL22-mediated ubiquitination |
| KLHL22 | Ubiquitin ligase adaptor regulating NSP6 | Controls stability of autophagic death regulator |
| MAP1LC3B | Autophagosome membrane marker | Readout of autophagic flux in death studies |
| ATG5 | Core autophagy machinery component | Required for autophagic cell death execution |
| ATG7 | Core autophagy machinery component | Required for autophagic cell death execution |
| GPX4 | Glutathione peroxidase protecting against ferroptosis | Negative regulator of autophagic ferroptotic death |
How Is positive regulation of autophagic cell death Regulated?
Positive regulation of autophagic cell death is controlled by multiple intersecting signaling modules. The AMPK/mTOR/ULK-1 axis integrates energy status with autophagy initiation, and its modulation by shikonin promotes apoptosis and autophagy in rheumatoid arthritis models. Receptor tyrosine kinase signaling through VEGFR2/STAT3/PD-L1, together with ROS/Nrf2/p62, drives autophagic and apoptotic cell death in lung cancer. Redox regulation of TRIM28 promotes SUMOylation and inhibits OPTN-selective autophagic degradation of ACSL4, thereby facilitating neuronal ferroptosis. Calcium overload-induced autophagic cell death is regulated by NSP6, whose stability is controlled by KLHL22-mediated ubiquitination. DAP-kinase provides an additional layer of regulation at the autophagy-cell death interface. Collectively, these pathways determine whether autophagic signaling promotes survival or commits the cell to death.
positive regulation of autophagic cell death and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| VEGFR2 | Lung cancer; autophagic and apoptotic death | Knockout or point-mutation lung cancer cell lines |
| TRIM28 | Neuronal ferroptosis; neurodegeneration | Knock-in or knockout neuronal models |
| ACSL4 | Ferroptosis; lipid peroxidation | Overexpression and knockout models |
| NSP6 | Calcium overload-induced autophagic death | Knockout and ubiquitination-site mutant models |
| ULK1 | Rheumatoid arthritis; autophagy induction | Knockout and overexpression models |
Cancer
In lung cancer, apatinib triggers autophagic and apoptotic cell death via VEGFR2/STAT3/PD-L1 and ROS/Nrf2/p62 signaling, making positive regulation of autophagic cell death a therapeutic target. Autophagy-dependent ferroptosis in cancer further supports the concept that inducing autophagic death can overcome therapy resistance. Ferroptosis is mechanistically an autophagic cell death process, linking iron-dependent lipid peroxidation to tumor cell death.
Neurodegeneration
Redox regulation of TRIM28 facilitates neuronal ferroptosis by promoting SUMOylation and inhibiting OPTN-selective autophagic degradation of ACSL4, implicating positive regulation of autophagic cell death in neuronal loss. Because ferroptosis is an autophagic cell death process, dysregulated autophagic death may contribute to neurodegenerative pathology.
Rheumatoid arthritis
Shikonin suppresses rheumatoid arthritis by inducing apoptosis and autophagy via modulation of the AMPK/mTOR/ULK-1 signaling pathway, demonstrating that positive regulation of autophagic cell death can be harnessed to limit inflammatory joint destruction.
Calcium overload-induced injury
NSP6 regulates calcium overload-induced autophagic cell death and is regulated by KLHL22-mediated ubiquitination, linking this GO term to tissue injury driven by calcium dyshomeostasis.
From positive regulation of autophagic cell death-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a candidate gene required for autophagic cell death? | CRISPR knockout cell line |
| Does a specific phosphorylation or ubiquitination site control the process? | Point-mutation knock-in |
| Does a disease-associated variant alter autophagic death? | Knock-in of the variant |
| Where does the protein localize during autophagic death? | Tagged knock-in (e.g., GFP/HA) |
| Does increased expression drive autophagic death? | Overexpression model |
| Which genes modulate autophagic death at scale? | CRISPR library screening |
How to Study the positive regulation of autophagic cell death Process
| Method | What It Measures | Typical Application |
|---|---|---|
| LC3B flux assay | Autophagosome formation and flux | Confirm autophagic death induction |
| p62 turnover | Selective autophagy activity | Monitor ROS/Nrf2/p62 signaling |
| Lipid peroxidation assay | Ferroptotic membrane damage | Link autophagy to ferroptosis |
| Phospho-Western blot | AMPK/mTOR/ULK-1 and STAT3 signaling | Map regulatory pathways |
| CRISPR library screen | Genome-wide modifiers of autophagic death | Discover positive regulators |
| Bioinformatics enrichment | Pathway and gene-set associations | Prioritize candidate genes |
| Immunofluorescence | Protein localization during death | Validate tagged knock-in models |
| Ubiquitination assay | KLHL22-mediated NSP6 regulation | Study post-translational control |
Autophagy flux assays
Measuring autophagic flux is essential to distinguish positive regulation of autophagic cell death from blocked autophagy. LC3B lipidation and p62 turnover are standard readouts, and p62 is directly implicated in ROS/Nrf2/p62 signaling during apatinib-induced autophagic death. Ferroptosis as an autophagic cell death process can be monitored with lipid peroxidation and iron-dependent assays.
Redox and ferroptosis profiling
Because redox regulation of TRIM28 facilitates neuronal ferroptosis via OPTN-selective autophagic degradation of ACSL4, redox and lipid peroxidation profiling is central to studying GO:1904094. GPX4 and ACSL4 levels are informative readouts of ferroptotic autophagic death.
Signaling pathway analysis
Western blotting and phospho-specific antibodies can resolve AMPK/mTOR/ULK-1 and VEGFR2/STAT3/PD-L1 signaling states during autophagic death. DAP-kinase activity assays provide additional mechanistic insight into the autophagy-cell death interface.
CRISPR screening and bioinformatics
Genome-wide CRISPR library screening combined with bioinformatics can identify positive regulators of autophagic cell death and prioritize candidates for validation. Pathway enrichment of hits against autophagy and ferroptosis gene sets helps contextualize findings.
How CRISPR Can Be Used to Study GO:1904094 positive regulation of autophagic cell death
Knockout
CRISPR knockout is used to test whether a candidate gene is required for positive regulation of autophagic cell death. For example, knocking out VEGFR2 pathway components or NSP6 can determine their necessity in autophagic death models. Knockout of autophagy machinery genes such as ATG5 or ATG7 is a standard control for autophagic death dependence.
Point Mutation
Point-mutation models are valuable for dissecting post-translational control. Because TRIM28 promotes SUMOylation and inhibits OPTN-selective autophagic degradation of ACSL4, mutation of the relevant SUMOylation or ubiquitination sites can reveal mechanistic details. Similarly, KLHL22-mediated ubiquitination of NSP6 can be interrogated with point mutants.
Knock-in
Knock-in of disease-associated variants or epitope tags enables precise functional and localization studies. Tagged knock-in of TRIM28, OPTN, or ACSL4 allows tracking of their behavior during neuronal ferroptosis. Knock-in of NSP6 variants can clarify how calcium overload-induced autophagic cell death is regulated.
Overexpression
Overexpression models test sufficiency of a candidate gene to drive autophagic cell death. Overexpressing ACSL4 or NSP6 can promote ferroptotic or calcium-dependent autophagic death, respectively. Overexpression of ULK1 or pathway activators can amplify AMPK/mTOR/ULK-1-driven autophagy.
How EDITGENE Supports positive regulation of autophagic cell death Research
Researchers studying positive regulation of autophagic cell death-related genes often need to determine whether a candidate gene is causally involved in initiating, executing, or modulating this lysosome-dependent death program, and CRISPR-based models provide the most direct route to that answer.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of autophagic cell death research.
Frequently Asked Questions About positive regulation of autophagic cell death
What is GO:1904094 positive regulation of autophagic cell death?
GO:1904094 is a Gene Ontology biological process term defined as any process that activates or increases the frequency, rate or extent of autophagic cell death.
What genes are involved in positive regulation of autophagic cell death?
Key genes include ULK1, AMPK, MTOR, VEGFR2, STAT3, PD-L1, Nrf2, p62, DAP-kinase, TRIM28, OPTN, ACSL4, NSP6, and KLHL22.
How is autophagic cell death different from apoptosis?
Autophagic cell death is a lysosome-dependent, macroautophagy-associated death program, whereas apoptosis is a caspase-dependent process; the two can be triggered together by agents such as apatinib.
What is the role of ferroptosis in autophagic cell death?
Ferroptosis has been characterized as an autophagic cell death process, linking iron-dependent lipid peroxidation to autophagic execution.
Which signaling pathway regulates autophagic cell death?
The AMPK/mTOR/ULK-1 pathway is a central regulator, and VEGFR2/STAT3/PD-L1 with ROS/Nrf2/p62 also drives autophagic death.
How does TRIM28 regulate neuronal ferroptosis?
Redox regulation of TRIM28 facilitates neuronal ferroptosis by promoting SUMOylation and inhibiting OPTN-selective autophagic degradation of ACSL4.
What is the role of NSP6 in autophagic cell death?
NSP6 regulates calcium overload-induced autophagic cell death and is itself regulated by KLHL22-mediated ubiquitination.
Can CRISPR be used to study positive regulation of autophagic cell death?
Yes, CRISPR knockout, point-mutation, knock-in, and overexpression models are used to establish causality for candidate regulators.
What diseases are linked to autophagic cell death?
Cancer, neurodegeneration, rheumatoid arthritis, and calcium overload-induced injury have been linked to autophagic cell death.
What methods measure autophagic cell death?
LC3B flux assays, p62 turnover, lipid peroxidation assays, phospho-Western blotting, CRISPR screens, and bioinformatics enrichment are commonly used.
Conclusion
GO:1904094 (positive regulation of autophagic cell death) defines a biologically and clinically important process that integrates autophagy, redox biology, iron metabolism, and calcium signaling. Real PubMed evidence links its regulators, including ULK1, AMPK, MTOR, VEGFR2, STAT3, PD-L1, Nrf2, p62, DAP-kinase, TRIM28, OPTN, ACSL4, NSP6, and KLHL22, to cancer, neurodegeneration, rheumatoid arthritis, and calcium overload-induced injury. Because autophagic cell death can be either protective or deleterious depending on context, rigorous causal studies using CRISPR knockout, point-mutation, knock-in, and overexpression models are essential. Combining these models with autophagy flux assays, redox profiling, and bioinformatics screening will continue to refine our understanding of GO:1904094 and its therapeutic potential.
References
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- 3. Gao M et al.. 2016. Ferroptosis is an autophagic cell death process.. Cell Res 26(9):1021-32 PMID: 27514700
- 4. Liu W et al.. 2025. Redox regulation of TRIM28 facilitates neuronal ferroptosis by promoting SUMOylation and inhibiting OPTN-selective autophagic degradation of ACSL4.. Cell Death Differ 32(6):1041-1057 PMID: 39875520
- 5. Chen F et al.. 2023. Autophagy-Dependent Ferroptosis in Cancer.. Antioxid Redox Signal 39(1-3):79-101 PMID: 36734418
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- 7. Wang XH et al.. 2024. Shikonin suppresses rheumatoid arthritis by inducing apoptosis and autophagy via modulation of the AMPK/mTOR/ULK-1 signaling pathway.. Phytomedicine 128:155512 PMID: 38460357
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