GO:1904568 cellular response to wortmannin: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1904568 (cellular response to wortmannin) describes any change in a cell's state or activity caused by wortmannin, a fungal sterol metabolite and widely used PI3K inhibitor.
• Wortmannin suppresses platelet responses by inhibiting pleckstrin phosphorylation, linking the term to phosphoinositide signaling and cytoskeletal regulation.
• The term is experimentally defined by differential sensitivity of cellular processes to wortmannin, such as blue-light-induced chloroplast reorientation in Lemna trisulca.
• Wortmannin is a standard tool to probe PI3K/Akt-dependent pathways, including drug resistance and DNA damage signaling [1,8].
• Cellular responses to wortmannin intersect with autophagy, oxidative injury protection, and inflammatory cytokine expression [2,5,6].
• CRISPR knockout, point-mutation, knock-in, and overexpression models enable causal testing of genes mediating the wortmannin response [1,3,5].
Description
GO:1904568, cellular response to wortmannin, is a biological process term that captures any change in a cell's state or activity (movement, secretion, enzyme production, gene expression, etc.) resulting from a wortmannin stimulus. Wortmannin is a cell-permeable fungal metabolite that has been used for decades as a pharmacological inhibitor of phosphoinositide 3-kinases (PI3Ks) and related signaling events. Because wortmannin acutely blocks pleckstrin phosphorylation and downstream PI3K/Akt signaling, the cellular response to wortmannin is a practical readout for phosphoinositide-dependent pathways in many cell types [1,7]. The term is not restricted to a single pathway. Experimental studies have used wortmannin to separate distinct cellular mechanisms, for example blue-light-induced chloroplast reorientations in Lemna trisulca, where different sensitivities to wortmannin revealed two separable processes. In mammalian cells, wortmannin-sensitive steps influence DNA damage responses, autophagy rates, and inflammatory gene expression, making GO:1904568 a useful annotation hub for researchers probing PI3K-dependent and PI3K-independent effects [5,6,8]. For biomedical researchers, GO:1904568 matters because wortmannin is a common tool compound in pathway dissection, drug-resistance studies, and autophagy flux measurements [1,5]. Understanding which genes and proteins mediate the cellular response to wortmannin helps interpret pharmacological experiments and design CRISPR-based causal tests [1,3,5].
cellular response to wortmannin At A Glance
| GO ID | GO:1904568 |
|---|---|
| GO term | cellular response to wortmannin |
| Ontology | biological_process |
| Synonym | cellular response to wartmannin |
| Definition | Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a wortmannin stimulus. |
| Major function | Mediates cellular adaptation to wortmannin, a PI3K inhibitor, affecting phosphoinositide signaling, autophagy, and DNA damage responses [1,5,7,8]. |
| Related stimulus | Wortmannin, a fungal sterol metabolite and irreversible PI3K inhibitor. |
| Example experimental system | Lemna trisulca chloroplast reorientation, platelet pleckstrin phosphorylation, and mammalian autophagy assays [4,5,7]. |
| Disease relevance | Cancer drug resistance, oxidative injury, and inflammatory signaling [1,2,6]. |
What Is GO:1904568?
In your own words, GO:1904568 (cellular response to wortmannin) is the set of cellular changes triggered when a cell encounters wortmannin. It includes alterations in movement, secretion, enzyme activity, and gene expression that occur as a result of the wortmannin stimulus. The term is defined by the stimulus (wortmannin) rather than by a single downstream pathway, so it can encompass inhibition of PI3K-dependent phosphorylation events, changes in autophagy, and other cellular adaptations [4,5,7].
Why Is cellular response to wortmannin Important in Cell Biology?
GO:1904568 is important because wortmannin is one of the most widely used pharmacological tools for probing PI3K/Akt signaling, and the cellular response to wortmannin defines the experimental window in which such studies are interpreted [1,7]. The term also captures PI3K-independent effects, as shown by differential wortmannin sensitivity of two separable chloroplast reorientation mechanisms in Lemna trisulca. In translational research, wortmannin-sensitive pathways influence drug resistance, oxidative injury protection, and inflammatory cytokine expression, making this GO term relevant to cancer, hepatology, and immunology [1,2,6].
• Provides a controlled stimulus for dissecting PI3K/Akt-dependent signaling in cells [1,7].
• Enables separation of distinct cellular mechanisms by differential wortmannin sensitivity.
• Links to autophagy regulation and dynamic autophagy rate measurements.
• Relevant to cancer drug resistance, including BCRP-mediated resistance.
• Connects to oxidative injury protection in hepatocytes.
• Influences inflammatory cytokine expression such as interleukin-8.
• Intersects with DNA damage response pathways involving ATM and 53BP1 [3,8].
• Supports platelet biology studies through pleckstrin phosphorylation.
• Offers a pharmacological benchmark for CRISPR-based causal gene testing [1,3,5].
• Helps interpret off-target or PI3K-independent effects of wortmannin in diverse cell types [4,5].
What Happens During cellular response to wortmannin?
Wortmannin stimulus and initial sensing
In simple terms: The cell first encounters wortmannin, a small molecule that enters cells and binds to PI3K enzymes.
Wortmannin is a cell-permeable fungal metabolite that acts as a potent inhibitor of phosphoinositide 3-kinases. The cellular response begins when wortmannin enters the cell and interacts with its primary targets, leading to rapid changes in phosphoinositide metabolism. In platelets, wortmannin suppresses responses to stimuli by inhibiting pleckstrin phosphorylation, demonstrating an early biochemical sensing step. The term GO:1904568 captures these initial changes in cell state caused by the wortmannin stimulus.
Inhibition of PI3K-dependent phosphorylation
In simple terms: Wortmannin blocks enzymes that add phosphate groups to lipids, which shuts down a major growth and survival signal.
A central event in the cellular response to wortmannin is the inhibition of PI3K-dependent phosphorylation events. In platelets, wortmannin suppresses pleckstrin phosphorylation, a downstream marker of PI3K activity. In cancer cells, the PI3K/Akt inhibitor LY294002, which shares mechanistic features with wortmannin, reverses BCRP-mediated drug resistance without affecting BCRP translocation, indicating that PI3K-dependent phosphorylation controls drug efflux function. These findings show that wortmannin-sensitive phosphorylation is a key node in the cellular response.
Separation of distinct cellular mechanisms by differential sensitivity
In simple terms: Different cellular processes respond to wortmannin at different doses, allowing researchers to tell them apart.
The cellular response to wortmannin is not monolithic. In Lemna trisulca, blue-light-induced chloroplast reorientations are controlled by two separable cellular mechanisms that show different sensitivity to wortmannin. This differential sensitivity demonstrates that wortmannin can be used to dissect parallel pathways within a single cell type. Such observations support the annotation of GO:1904568 as a broad response term encompassing multiple downstream processes.
Autophagy and dynamic rate changes
In simple terms: Wortmannin can alter how fast cells recycle their own components through autophagy.
Wortmannin-sensitive signaling intersects with autophagy. Quantitative and temporal measurement of dynamic autophagy rates provides a framework to detect changes in autophagic flux, which can be modulated by PI3K inhibitors such as wortmannin. Because autophagy is a dynamic process, the cellular response to wortmannin may include shifts in autophagosome formation and degradation rates. These measurements are essential for interpreting whether wortmannin promotes or blocks autophagy in a given context.
DNA damage and stress signaling crosstalk
In simple terms: Wortmannin-sensitive pathways can influence how cells respond to DNA damage.
The cellular response to wortmannin overlaps with DNA damage signaling. ATM is activated in response to N-methyl-N'-nitro-N-nitrosoguanidine-induced DNA alkylation, and 53BP1 is an early participant in the cellular response to DNA double-strand breaks [3,8]. PI3K-related kinases such as ATM are structurally related to PI3K and can be affected by wortmannin, linking GO:1904568 to genotoxic stress responses [3,8]. This crosstalk is important when interpreting wortmannin effects in DNA damage experiments.
Key Genes Involved in GO:1904568 cellular response to wortmannin
The following genes and proteins have been experimentally linked to wortmannin-sensitive cellular responses or are commonly used as readouts in such studies.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PIK3CA | Catalytic subunit of PI3K alpha, primary wortmannin target | Wortmannin inhibits PI3K-dependent phosphorylation |
| PIK3CB | Catalytic subunit of PI3K beta | Wortmannin-sensitive phosphoinositide signaling |
| PIK3CD | Catalytic subunit of PI3K delta | Wortmannin-sensitive immune cell signaling |
| PIK3CG | Catalytic subunit of PI3K gamma | Wortmannin-sensitive leukocyte responses |
| AKT1 | Serine/threonine kinase downstream of PI3K | Wortmannin-sensitive survival signaling |
| AKT2 | Serine/threonine kinase downstream of PI3K | Wortmannin-sensitive metabolic signaling |
| ATM | PI3K-related kinase activated by DNA damage | Wortmannin-sensitive DNA damage response |
| TP53BP1 | DNA double-strand break response protein | Early participant in DNA damage response |
| PLEK | Pleckstrin, substrate of protein kinase C | Phosphorylation suppressed by wortmannin in platelets |
| ABCG2 | BCRP drug efflux transporter | PI3K/Akt inhibition reverses BCRP-mediated resistance |
| HGF | Hepatocyte growth factor | Protects hepatocytes against oxidative injury |
| IL8 | Interleukin-8 cytokine | Regulated by IGF-I and inflammatory cytokines |
| IGF1 | Insulin-like growth factor-I | Regulates interleukin-8 expression in prostate cancer cells |
| MAP1LC3B | Autophagy marker LC3 | Used to measure dynamic autophagy rates |
| SQSTM1 | p62 autophagy receptor | Autophagy flux readout |
| ULK1 | Autophagy initiation kinase | Wortmannin-sensitive autophagy regulation |
| BECN1 | Beclin-1 autophagy regulator | PI3K-sensitive autophagy |
How Is cellular response to wortmannin Regulated?
The cellular response to wortmannin is regulated at multiple levels. The primary regulation is through direct inhibition of PI3K enzymes by wortmannin, which blocks production of phosphatidylinositol 3,4,5-trisphosphate and downstream Akt activation. This inhibition can be partial or complete depending on wortmannin concentration, as shown by differential sensitivity of two chloroplast reorientation mechanisms in Lemna trisulca. Downstream regulation involves autophagy initiation complexes, where wortmannin-sensitive PI3K signaling modulates ULK1 and BECN1 activity. Additionally, crosstalk with DNA damage kinases such as ATM can influence the cellular response to wortmannin in genotoxic contexts. In cancer cells, PI3K/Akt inhibition by compounds like LY294002 can reverse BCRP-mediated drug resistance, indicating that the response is integrated with drug efflux regulation.
cellular response to wortmannin and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ABCG2 | BCRP-mediated cancer drug resistance | Knockout of ABCG2 in cancer cell lines followed by wortmannin treatment |
| HGF | Ethanol-induced oxidative liver injury | Hepatocyte knockout of HGF receptor with wortmannin exposure |
| IL8 | Prostate cancer inflammation | IL8 reporter knock-in in prostate cancer cells treated with wortmannin |
| ATM | DNA damage response and genomic instability | ATM point-mutation knock-in cells treated with wortmannin and DNA alkylating agents |
| TP53BP1 | DNA double-strand break repair | 53BP1 knockout cells with wortmannin and irradiation |
Cancer drug resistance
Wortmannin-sensitive PI3K/Akt signaling contributes to cancer drug resistance. The PI3K/Akt inhibitor LY294002 reverses BCRP-mediated drug resistance without affecting BCRP translocation, suggesting that PI3K-dependent pathways regulate drug efflux activity. Because wortmannin targets the same PI3K family, the cellular response to wortmannin is directly relevant to understanding and overcoming chemoresistance in cancer cells.
Oxidative injury and hepatoprotection
Hepatocyte growth factor protects hepatocytes against oxidative injury induced by ethanol metabolism. Wortmannin-sensitive pathways may modulate this protection, as PI3K signaling is often involved in survival responses. Studying GO:1904568 in hepatocytes can clarify whether wortmannin blocks or enhances protective signaling under oxidative stress.
Inflammatory signaling in prostate cancer
Interleukin-8 expression in human prostate cancer cells is regulated by insulin-like growth factor-I and inflammatory cytokines. Wortmannin-sensitive PI3K pathways may influence this regulation, linking GO:1904568 to inflammatory microenvironments in prostate cancer. Experimental models using wortmannin can help dissect the contribution of PI3K to cytokine expression.
DNA damage response and genomic instability
ATM is activated in response to DNA alkylation, and 53BP1 is an early participant in the cellular response to DNA double-strand breaks [3,8]. Because ATM belongs to the PI3K-related kinase family, wortmannin can affect DNA damage signaling. The cellular response to wortmannin therefore intersects with genomic instability disorders and may inform studies of DNA repair defects [3,8].
From cellular response to wortmannin-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does PI3K alpha mediate the cellular response to wortmannin? | PIK3CA knockout cell line |
| Is BCRP drug resistance reversed by wortmannin-sensitive PI3K inhibition? | ABCG2 knockout and overexpression models |
| Does wortmannin block protective HGF signaling in hepatocytes? | HGF receptor knockout hepatocytes |
| How does wortmannin affect autophagy flux? | MAP1LC3B tagged knock-in for live autophagy tracking |
| Does ATM kinase activity contribute to wortmannin response? | ATM point-mutation knock-in cells |
| Is 53BP1 recruitment wortmannin-sensitive? | TP53BP1 knockout with tagged knock-in rescue |
How to Study the cellular response to wortmannin Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Phospho-pleckstrin immunoblot | PI3K-dependent phosphorylation | Platelet response to wortmannin |
| LC3 flux assay | Autophagosome turnover | Dynamic autophagy rates with wortmannin |
| 53BP1 foci imaging | DNA double-strand break response | Wortmannin and irradiation studies |
| Phospho-ATM immunoblot | ATM kinase activation | DNA alkylation with wortmannin |
| Drug efflux assay | BCRP transporter activity | PI3K inhibitor reversal of resistance |
| IL-8 ELISA | Inflammatory cytokine secretion | Prostate cancer cells with wortmannin |
| Chloroplast reorientation assay | Blue-light-induced movement | Lemna trisulca wortmannin sensitivity |
| Hepatocyte oxidative injury assay | Cell survival under ethanol metabolism | HGF protection with wortmannin |
Quantitative autophagy rate measurement
Dynamic autophagy rates can be measured using quantitative and temporal assays, such as LC3 turnover and flux analysis, in cells treated with wortmannin. These methods distinguish changes in autophagosome formation from changes in degradation, which is critical because wortmannin can affect both PI3K-dependent and autophagy-related pathways.
Phosphorylation assays for PI3K substrates
Pleckstrin phosphorylation is a sensitive readout of wortmannin-sensitive PI3K activity in platelets and other cells. Immunoblotting or phospho-specific antibodies can quantify changes in phosphorylation after wortmannin treatment. Such assays are foundational for confirming that a cellular response is wortmannin-sensitive.
DNA damage response imaging
53BP1 foci formation is an early marker of DNA double-strand breaks and can be imaged in cells treated with wortmannin and genotoxic agents. ATM activation can be monitored by phospho-ATM antibodies after DNA alkylation. These imaging and biochemical methods link GO:1904568 to DNA repair biology [3,8].
Drug resistance and efflux assays
BCRP-mediated drug resistance can be assessed by efflux assays and cytotoxicity measurements in cells treated with PI3K inhibitors such as LY294002 or wortmannin. These methods test whether wortmannin-sensitive pathways modulate drug transporter function without affecting transporter localization.
How CRISPR Can Be Used to Study GO:1904568 cellular response to wortmannin
Knockout
CRISPR knockout of PI3K catalytic subunits such as PIK3CA can test whether the cellular response to wortmannin requires specific PI3K isoforms. Knockout of ABCG2 can determine whether BCRP-mediated drug resistance is reversed by wortmannin-sensitive PI3K inhibition. Knockout of TP53BP1 can reveal whether 53BP1 recruitment is wortmannin-sensitive.
Point Mutation
Point mutations in ATM kinase domain can be introduced to test whether wortmannin-sensitive ATM activity contributes to DNA damage responses. Point mutations in PIK3CA that alter wortmannin binding can help distinguish on-target from off-target effects. Such models provide precise causal evidence for GO:1904568 mechanisms.
Knock-in
Tagged knock-in of MAP1LC3B allows live tracking of autophagosome dynamics in response to wortmannin. Knock-in of IL8 reporter constructs enables quantitative measurement of inflammatory cytokine expression after wortmannin treatment. These models link GO:1904568 to dynamic cellular readouts.
Overexpression
Overexpression of HGF or its receptor can test whether wortmannin blocks protective signaling against oxidative injury in hepatocytes. Overexpression of BCRP (ABCG2) can assess whether wortmannin-sensitive PI3K inhibition reverses drug resistance. Overexpression models complement knockout studies by testing gain-of-function effects.
How EDITGENE Supports cellular response to wortmannin Research
Researchers studying cellular response to wortmannin-related genes often need to determine whether a candidate gene is causally involved in the response or merely correlated with it. Pharmacological inhibition with wortmannin provides a starting point, but genetic models are required to establish causality and to separate on-target from off-target effects [1,3,5].
Contact EDITGENE today to design your custom CRISPR model for cellular response to wortmannin research.
Frequently Asked Questions About cellular response to wortmannin
What is GO:1904568 cellular response to wortmannin?
GO:1904568 is a Gene Ontology biological process term describing any change in a cell's state or activity caused by a wortmannin stimulus, including movement, secretion, enzyme production, and gene expression.
What is wortmannin and how does it affect cells?
Wortmannin is a fungal metabolite that inhibits PI3K enzymes and suppresses pleckstrin phosphorylation, leading to changes in phosphoinositide signaling and downstream cellular responses.
What genes are involved in cellular response to wortmannin?
Genes include PIK3CA, PIK3CB, PIK3CD, PIK3CG, AKT1, AKT2, ATM, TP53BP1, PLEK, ABCG2, HGF, IL8, IGF1, MAP1LC3B, SQSTM1, ULK1, and BECN1 [1,2,3,5,6,7,8].
How is wortmannin used in autophagy research?
Wortmannin is used to modulate PI3K-dependent autophagy, and dynamic autophagy rates can be measured with quantitative temporal assays such as LC3 flux analysis.
Does wortmannin affect DNA damage responses?
Yes, wortmannin can affect PI3K-related kinases such as ATM, which is activated by DNA alkylation, and 53BP1, an early DNA double-strand break response protein [3,8].
Can wortmannin reverse cancer drug resistance?
PI3K/Akt inhibition by LY294002, which shares mechanistic features with wortmannin, reverses BCRP-mediated drug resistance without affecting BCRP translocation.
What experimental models are used to study cellular response to wortmannin?
Models include platelet phosphorylation assays, Lemna trisulca chloroplast reorientation, hepatocyte oxidative injury assays, autophagy flux measurements, and CRISPR knockout or knock-in cell lines [1,2,3,4,5,6,7,8].
Is wortmannin sensitivity different across cellular processes?
Yes, in Lemna trisulca, blue-light-induced chloroplast reorientations are controlled by two separable mechanisms with different sensitivity to wortmannin.
How does wortmannin relate to oxidative injury?
Hepatocyte growth factor protects hepatocytes against oxidative injury induced by ethanol metabolism, and wortmannin-sensitive PI3K pathways may modulate this protection.
What CRISPR models are available for wortmannin response genes?
EDITGENE offers knockout, point-mutation, knock-in, tagged knock-in, and overexpression models for genes such as PIK3CA, ABCG2, ATM, TP53BP1, MAP1LC3B, and IL8 [1,3,5,6,7,8].
Conclusion
GO:1904568 cellular response to wortmannin is a biologically meaningful Gene Ontology term that captures the diverse cellular changes triggered by wortmannin, a widely used PI3K inhibitor. From platelet pleckstrin phosphorylation to chloroplast reorientation, autophagy flux, and DNA damage signaling, the term spans multiple experimental systems and disease-relevant pathways [1,2,3,4,5,6,7,8]. For researchers, understanding this response is essential for interpreting pharmacological experiments and for designing genetic models that establish causality. CRISPR knockout, point-mutation, knock-in, and overexpression approaches, combined with autophagy, phosphorylation, and imaging assays, provide a robust toolkit to dissect the genes and mechanisms underlying GO:1904568 [1,3,5,7,8].
References
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- 2. Valdés-Arzate A et al.. 2009. Hepatocyte growth factor protects hepatocytes against oxidative injury induced by ethanol metabolism.. Free Radic Biol Med 47(4):424-30 PMID: 19463946
- 3. Schultz LB et al.. 2000. p53 binding protein 1 (53BP1) is an early participant in the cellular response to DNA double-strand breaks.. J Cell Biol 151(7):1381-90 PMID: 11134068
- 4. Grabalska M et al.. 2004. Blue light-induced chloroplast reorientations in Lemna trisulca L. (duckweed) are controlled by two separable cellular mechanisms as suggested by different sensitivity to wortmannin.. Photochem Photobiol 79(4):343-8 PMID: 15137511
- 5. Beesabathuni NS et al.. 2023. Quantitative and temporal measurement of dynamic autophagy rates.. Autophagy 19(4):1164-1183 PMID: 36026492
- 6. Kooijman R et al.. 2007. Regulation of interleukin-8 expression in human prostate cancer cells by insulin-like growth factor-I and inflammatory cytokines.. Growth Horm IGF Res 17(5):383-91 PMID: 17513150
- 7. Yatomi Y et al.. 1992. Suppression by wortmannin of platelet responses to stimuli due to inhibition of pleckstrin phosphorylation.. Biochem J 285 ( Pt 3)(Pt 3):745-51 PMID: 1497612
- 8. Adamson AW et al.. 2002. ATM is activated in response to N-methyl-N'-nitro-N-nitrosoguanidine-induced DNA alkylation.. J Biol Chem 277(41):38222-9 PMID: 12151394
