GO:1902174 positive regulation of keratinocyte apoptotic process: Apoptosis Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1902174 describes any process that activates or increases the frequency, rate or extent of keratinocyte apoptotic process.
• Keratinocyte apoptosis is a tightly regulated form of programmed cell death essential for epidermal homeostasis, skin barrier integrity, and immune surveillance.
• Dysregulated positive regulation of keratinocyte apoptosis contributes to inflammatory skin diseases such as atopic dermatitis, psoriasis, and Stevens-Johnson syndrome/toxic epidermal necrolysis.
• Key molecular players include TRPV3, PARP1, AIFM1, MIF, JNK2, PFN1, FOXM1, and AURKB, which modulate oxidative stress, inflammation, and cell survival pathways.
• Experimental models for studying this process include CRISPR knockout, point mutation, knock-in, and overexpression cell models, as well as CRISPR library screening and bioinformatics.
• Understanding positive regulation of keratinocyte apoptosis provides therapeutic targets for skin inflammation, wound healing, and cancer.
Description
The Gene Ontology (GO) term GO:1902174, positive regulation of keratinocyte apoptotic process, is a biological process that encompasses any mechanism that activates or increases the frequency, rate, or extent of apoptosis specifically in keratinocytes. Keratinocytes are the predominant cell type in the epidermis and play a critical role in forming the skin barrier and mounting immune responses. Apoptosis of keratinocytes is a normal physiological event that maintains tissue homeostasis, but its dysregulation is a hallmark of several skin pathologies. This term is essential for researchers studying skin biology, inflammatory diseases, and cancer, as it provides a framework to annotate genes and pathways that promote keratinocyte death. Recent studies have highlighted the importance of positive regulation of keratinocyte apoptosis in conditions such as atopic dermatitis, where TRPV3-activated oxidative stress leads to PARP1/AIFM1/MIF axis-mediated apoptosis. Similarly, in Stevens-Johnson syndrome and toxic epidermal necrolysis, sensory neuroimmune signaling amplifies keratinocyte apoptosis, leading to severe epidermal detachment. In psoriasis, proteins like PFN1 and FOXM1/AURKB modulate keratinocyte survival and proliferation, indirectly influencing apoptotic thresholds. These findings underscore the need for precise experimental models to dissect the molecular players involved. This article synthesizes authoritative QuickGO data and verified PubMed literature to provide a comprehensive overview of GO:1902174, covering its definition, mechanisms, key genes, disease relevance, and research methodologies. By integrating this information, we aim to support researchers in designing robust experiments and developing targeted therapies for skin disorders.
positive regulation of keratinocyte apoptotic process At A Glance
| GO ID | GO:1902174 |
|---|---|
| GO term | positive regulation of keratinocyte apoptotic process |
| Ontology | biological_process |
| Synonym | activation of keratinocyte apoptosis; upregulation of keratinocyte apoptotic process; positive regulation of keratinocyte apoptosis |
| Major function | Activates or increases the frequency, rate or extent of apoptosis in keratinocytes |
| Related processes | Keratinocyte apoptotic process (GO:0097284); regulation of keratinocyte apoptotic process (GO:1902173) |
| Disease relevance | Atopic dermatitis, psoriasis, Stevens-Johnson syndrome, toxic epidermal necrolysis, wound healing disorders |
| Key regulators | TRPV3, PARP1, AIFM1, MIF, JNK2, PFN1, FOXM1, AURKB |
What Is GO:1902174?
GO:1902174, positive regulation of keratinocyte apoptotic process, is defined as any process that activates or increases the frequency, rate or extent of keratinocyte apoptotic process. In simpler terms, it includes all molecular events that push keratinocytes toward programmed cell death, either by directly triggering apoptotic machinery or by removing survival signals.
Why Is positive regulation of keratinocyte apoptotic process Important in Cell Biology?
Positive regulation of keratinocyte apoptosis is critical for maintaining epidermal homeostasis and preventing hyperproliferative or inflammatory skin diseases. Dysregulation of this process can lead to excessive keratinocyte death, as seen in toxic epidermal necrolysis, or impaired apoptosis, contributing to psoriasis and skin cancer. Understanding the molecular mechanisms allows for the development of targeted therapies and diagnostic biomarkers.
• Maintains skin barrier integrity by eliminating damaged or infected keratinocytes.
• Prevents hyperproliferative skin disorders such as psoriasis by balancing cell death and renewal.
• Mediates inflammatory skin diseases like atopic dermatitis through oxidative stress and cytokine release.
• Plays a role in severe drug reactions such as Stevens-Johnson syndrome and toxic epidermal necrolysis.
• Influences wound healing by regulating keratinocyte survival during re-epithelialization.
• Provides targets for cancer therapy, as evasion of apoptosis is a hallmark of skin cancers.
• Involves key signaling pathways such as JNK, NF-κB, and oxidative stress responses.
• Enables research into gene-environment interactions in skin inflammation.
• Supports development of CRISPR-based models for skin disease research.
• Facilitates drug discovery for dermatological conditions by identifying apoptotic regulators.
What Happens During positive regulation of keratinocyte apoptotic process?
Initiation by Oxidative Stress and TRPV3 Activation
In simple terms: When skin cells are stressed, certain channels open and cause damage that triggers cell death.
In atopic dermatitis, activation of the ion channel TRPV3 leads to increased oxidative stress within keratinocytes. This oxidative stress activates PARP1, which then triggers the release of AIFM1 from mitochondria and the subsequent secretion of MIF, ultimately promoting keratinocyte apoptosis. This pathway exemplifies how positive regulation of apoptosis can be initiated by environmental or inflammatory stimuli.
JNK-Mediated Signaling and Apoptosis
In simple terms: Stress-activated proteins like JNK can push cells to self-destruct.
JNK2, a member of the c-Jun N-terminal kinase family, has been identified as a negative regulator of cellular proliferation. In keratinocytes, JNK signaling can promote apoptosis in response to stress, and its dysregulation may contribute to skin pathologies. The balance between JNK isoforms influences cell fate decisions.
Inflammatory Cytokine Amplification
In simple terms: Immune signals can make skin cells more likely to die.
Inflammatory cytokines such as IFN-γ and IL-33 form a regulatory loop in skin inflammation. IFN-γ can enhance keratinocyte apoptosis, while IL-33 released from dying cells further amplifies inflammation. This positive feedback loop exacerbates tissue damage in conditions like atopic dermatitis and psoriasis.
Regulation by Cytoprotective and Pro-Survival Factors
In simple terms: Some proteins protect skin cells from dying, and when they fail, apoptosis increases.
PFN1 (profilin-1) prevents psoriasis pathogenesis by regulating IκBζ, and its loss may lead to increased keratinocyte apoptosis. Similarly, FOXM1 and AURKB are involved in regulating keratinocyte function in psoriasis; their modulation can affect apoptotic susceptibility. These factors represent nodes where positive regulation of apoptosis can be suppressed or enhanced.
Execution of Apoptosis
In simple terms: Once the death signal is strong enough, the cell dismantles itself.
The final steps of keratinocyte apoptosis involve mitochondrial outer membrane permeabilization, caspase activation, and DNA fragmentation. AIFM1 release from mitochondria is a key event in the TRPV3-PARP1 pathway. Understanding these execution mechanisms is vital for identifying therapeutic targets.
Key Genes Involved in GO:1902174 positive regulation of keratinocyte apoptotic process
The following genes and proteins have been experimentally linked to the positive regulation of keratinocyte apoptotic process, based on verified PubMed literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| TRPV3 | Ion channel; mediates oxidative stress-induced apoptosis | Target in atopic dermatitis; modulates PARP1/AIFM1/MIF axis |
| PARP1 | DNA repair enzyme; activated by oxidative stress | Promotes AIFM1 release and apoptosis in keratinocytes |
| AIFM1 | Mitochondrial flavoprotein; induces apoptosis | Executes apoptosis upon release from mitochondria |
| MIF | Pro-inflammatory cytokine | Secreted during apoptosis; amplifies inflammation |
| JNK2 | Stress-activated kinase | Negative regulator of proliferation; may promote apoptosis |
| PFN1 | Actin-binding protein | Prevents psoriasis by regulating IκBζ; loss may enhance apoptosis |
| FOXM1 | Transcription factor | Regulates keratinocyte proliferation and survival in psoriasis |
| AURKB | Aurora kinase B | Mitotic regulator; affects keratinocyte function in psoriasis |
| IFN-γ | Pro-inflammatory cytokine | Enhances keratinocyte apoptosis in skin inflammation |
| IL-33 | Alarmin cytokine | Released by dying keratinocytes; amplifies inflammation |
| IκBζ | NF-κB regulator | Modulates inflammatory responses; target of PFN1 |
| Caspase-3 | Executioner caspase | Cleaves cellular substrates during apoptosis (implied in) |
| Caspase-9 | Initiator caspase | Activates downstream caspases in intrinsic apoptosis (implied in) |
| Bax | Pro-apoptotic Bcl-2 family member | Promotes mitochondrial permeabilization (implied in) |
| Bak | Pro-apoptotic Bcl-2 family member | Promotes mitochondrial permeabilization (implied in) |
| Cytochrome c | Electron carrier; activates apoptosome | Released from mitochondria during apoptosis (implied in) |
How Is positive regulation of keratinocyte apoptotic process Regulated?
The positive regulation of keratinocyte apoptotic process is controlled by a complex network of signaling pathways. Oxidative stress activates PARP1 and AIFM1, while inflammatory cytokines such as IFN-γ and IL-33 create a positive feedback loop that amplifies apoptosis. Conversely, pro-survival factors like PFN1 and FOXM1/AURKB suppress apoptosis, and their downregulation can tip the balance toward cell death. Additionally, JNK signaling integrates stress signals to modulate apoptotic thresholds. These regulatory mechanisms are potential targets for therapeutic intervention in skin diseases.
positive regulation of keratinocyte apoptotic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| TRPV3 | Atopic dermatitis | Knockout or overexpression in HaCaT keratinocytes |
| PFN1 | Psoriasis | Knockdown or knockout in primary keratinocytes |
| FOXM1 | Psoriasis | Overexpression and knockout in keratinocyte cell lines |
| AURKB | Psoriasis | Point mutation or knockout in keratinocytes |
| JNK2 | Skin inflammation | Knockout mice or keratinocyte-specific deletion |
Atopic Dermatitis
In atopic dermatitis, TRPV3 activation induces oxidative stress and triggers the PARP1/AIFM1/MIF axis, leading to increased keratinocyte apoptosis and inflammation. This pathway contributes to the chronic inflammatory milieu of the disease. IFN-γ and IL-33 further amplify apoptosis and inflammation in a regulatory loop.
Psoriasis
Psoriasis is characterized by hyperproliferation and abnormal keratinocyte apoptosis. PFN1 prevents psoriasis pathogenesis by regulating IκBζ, and its deficiency may lead to increased apoptosis. FOXM1 and AURKB also regulate keratinocyte function in psoriasis, influencing cell survival and proliferation.
Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis
These severe cutaneous adverse reactions involve extensive keratinocyte apoptosis, leading to epidermal detachment. Sensory neuroimmune signaling pathways amplify apoptosis in these conditions, and targeting these pathways may offer therapeutic benefit.
Wound Healing and Diabetes
D-mannose promotes diabetic wound healing by inhibiting advanced glycation end products in keratinocytes, which may reduce apoptosis and enhance re-epithelialization. Thus, positive regulation of apoptosis can be detrimental in chronic wounds.
From positive regulation of keratinocyte apoptotic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does TRPV3 activate PARP1/AIFM1/MIF axis? | TRPV3 knockout or overexpression in keratinocytes |
| What is the role of PFN1 in psoriasis? | PFN1 knockout and knock-in in HaCaT cells |
| How does FOXM1 regulate keratinocyte apoptosis? | FOXM1 overexpression and CRISPR knockout |
| Does JNK2 promote keratinocyte apoptosis? | JNK2 knockout mice or cell lines |
| Can D-mannose inhibit keratinocyte apoptosis? | Overexpression of glycation targets in keratinocytes |
| What genes regulate keratinocyte apoptosis? | CRISPR library screening in keratinocyte cell lines |
How to Study the positive regulation of keratinocyte apoptotic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout | Gene function loss | Identify positive regulators of apoptosis |
| RNA-seq | Transcriptional changes | Profile apoptotic pathways |
| Proteomics | Protein expression and modifications | Detect PARP1 activation and AIFM1 release |
| Flow cytometry | Apoptotic cell frequency | Quantify keratinocyte apoptosis |
| Immunofluorescence | Protein localization | Visualize AIFM1 translocation |
| Western blot | Protein cleavage and activation | Detect caspase-3 and PARP1 cleavage |
| CRISPR library screen | Genome-wide gene function | Discover novel apoptotic regulators |
CRISPR-Based Genetic Screens
CRISPR library screening allows unbiased identification of genes that positively regulate keratinocyte apoptosis. By transducing keratinocytes with a genome-wide sgRNA library and inducing apoptosis, resistant or sensitive clones can be sequenced to reveal candidate regulators.
RNA Sequencing and Transcriptomics
RNA-seq can profile gene expression changes during keratinocyte apoptosis. Comparing apoptotic versus surviving cells reveals pathways and genes such as TRPV3, PARP1, and inflammatory cytokines.
Proteomics and Phosphoproteomics
Mass spectrometry-based proteomics can identify protein interactions and post-translational modifications in apoptotic keratinocytes. For example, AIFM1 release and PARP1 activation can be monitored.
Imaging and Flow Cytometry
Annexin V/PI staining and caspase activity assays quantify apoptosis. Immunofluorescence can visualize mitochondrial release of AIFM1 and nuclear fragmentation.
How CRISPR Can Be Used to Study GO:1902174 positive regulation of keratinocyte apoptotic process
Knockout
CRISPR knockout of candidate genes such as TRPV3 or PFN1 in keratinocytes can determine their necessity for apoptosis. For example, TRPV3 knockout reduces oxidative stress-induced apoptosis.
Point Mutation
Introducing point mutations in genes like AURKB can mimic disease-associated variants and assess their impact on keratinocyte apoptosis.
Knock-in
Knock-in of tagged versions of AIFM1 or PARP1 allows live-cell imaging of their localization during apoptosis.
Overexpression
Overexpression of pro-apoptotic genes such as FOXM1 or inflammatory cytokines can enhance apoptosis and model disease states.
How EDITGENE Supports positive regulation of keratinocyte apoptotic process Research
Researchers studying positive regulation of keratinocyte apoptotic process-related genes often need to determine whether a candidate gene is causally involved in apoptosis, and CRISPR-based models provide the most direct approach. EDITGENE offers a comprehensive suite of services to support such investigations.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of keratinocyte apoptotic process research.
Frequently Asked Questions About positive regulation of keratinocyte apoptotic process
What is GO:1902174?
GO:1902174 is a Gene Ontology term for positive regulation of keratinocyte apoptotic process, describing any process that activates or increases the frequency, rate or extent of apoptosis in keratinocytes.
What genes are involved in positive regulation of keratinocyte apoptotic process?
Key genes include TRPV3, PARP1, AIFM1, MIF, JNK2, PFN1, FOXM1, and AURKB, as identified in studies of skin inflammation and psoriasis.
How is keratinocyte apoptosis regulated?
It is regulated by oxidative stress, inflammatory cytokines like IFN-γ and IL-33, and signaling pathways such as JNK and NF-κB.
What diseases are associated with dysregulated keratinocyte apoptosis?
Atopic dermatitis, psoriasis, Stevens-Johnson syndrome, toxic epidermal necrolysis, and impaired wound healing are linked to altered keratinocyte apoptosis.
What experimental models are used to study positive regulation of keratinocyte apoptosis?
CRISPR knockout, point mutation, knock-in, overexpression cell models, and CRISPR library screening are commonly used.
How does TRPV3 contribute to keratinocyte apoptosis?
TRPV3 activation induces oxidative stress, which activates PARP1 and AIFM1, leading to MIF release and apoptosis in atopic dermatitis.
What is the role of PFN1 in psoriasis?
PFN1 prevents psoriasis pathogenesis by regulating IκBζ; its loss may increase keratinocyte apoptosis.
Can CRISPR screens identify regulators of keratinocyte apoptosis?
Yes, genome-wide CRISPR screens can uncover novel genes that positively or negatively regulate keratinocyte apoptosis.
What is the relationship between JNK2 and keratinocyte apoptosis?
JNK2 is a stress-activated kinase that can promote apoptosis and negatively regulate proliferation in keratinocytes.
How can EDITGENE help study keratinocyte apoptosis?
EDITGENE provides CRISPR knockout, point mutation, knock-in, overexpression models, library screening, and bioinformatics services tailored to skin biology research.
Conclusion
GO:1902174, positive regulation of keratinocyte apoptotic process, is a critical biological process in skin homeostasis and disease. Dysregulation of this process contributes to inflammatory skin conditions, severe drug reactions, and impaired wound healing. Understanding the molecular players and utilizing advanced CRISPR models can accelerate the development of targeted therapies. EDITGENE offers comprehensive services to support researchers in this endeavor.
References
- 1. Song Z et al.. 2024. TRPV3-Activated PARP1/AIFM1/MIF Axis through Oxidative Stress Contributes to Atopic Dermatitis.. J Invest Dermatol 144(12):2695-2705.e8 PMID: 38823435
- 2. Seltmann J et al.. 2013. Evidence for a regulatory loop between IFN-γ and IL-33 in skin inflammation.. Exp Dermatol 22(2):102-7 PMID: 23362867
- 3. Huang X et al.. 2025. Sensory neuroimmune signaling in the pathogenesis of Stevens-Johnson syndrome and toxic epidermal necrolysis.. J Allergy Clin Immunol 155(2):533-546 PMID: 39481654
- 4. Sabapathy K et al.. 2004. JNK2: a negative regulator of cellular proliferation.. Cell Cycle 3(12):1520-3 PMID: 15611655
- 5. Luo J et al.. 2025. D-mannose promotes diabetic wound healing through inhibiting advanced glycation end products formation in keratinocytes.. Mol Med 31(1):15 PMID: 39827347
- 6. Mok BR et al.. 2022. PFN1 Prevents Psoriasis Pathogenesis through IκBζ Regulation.. J Invest Dermatol 142(9):2455-2463.e9 PMID: 35148999
- 7. Kamata Y et al.. 2024. Identification of Keratinocyte Cytoprotectants against Toxicity by the Multikinase Inhibitor Sorafenib Using Drug Repositioning.. JID Innov 4(3):100271 PMID: 38585194
- 8. Zhao Z et al.. 2024. Role of FOXM1 and AURKB in regulating keratinocyte function in psoriasis.. Open Med (Wars) 19(1):20241049 PMID: 39381423
