GO:0035984 cellular response to trichostatin A: HDAC Inhibition Response, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0035984 describes the cellular response to trichostatin A (TSA), a hydroxamic acid HDAC inhibitor that induces histone hyperacetylation and widespread changes in gene expression.
• TSA triggers a small but reproducible set of transcriptional changes, with only a fraction of cellular genes responding to histone hyperacetylation.
• Cancer cells show differential sensitivity to TSA compared with other HDAC inhibitors such as depsipeptide, indicating context-dependent response programs.
• TSA modulates autophagy and macrophage phenotype, linking this GO term to inflammation and sepsis biology.
• TSA can enhance anti-stress responses via upregulation of HDAC4 and downregulation of IGF/Akt signaling.
• Genome-wide studies in multiple myeloma show that TSA cooperates with DNA-demethylating agents to reprogram gene expression.
Description
GO:0035984, cellular response to trichostatin A, is a biological process term that captures all changes in a cell's state or activity following exposure to trichostatin A (TSA), a classic histone deacetylase (HDAC) inhibitor. TSA is widely used experimentally to induce histone hyperacetylation and to probe the role of chromatin modification in gene regulation. The cellular response includes transcriptional reprogramming, changes in signaling pathways, and adaptive responses such as autophagy and stress resistance. Because TSA affects only a small fraction of genes despite global histone hyperacetylation, the response is highly selective and context-dependent. Cancer cells, for example, display differential sensitivity to TSA compared with other HDAC inhibitors, making this term relevant to epigenetic therapy research. In multiple myeloma, TSA combined with 5-aza-2'-deoxycytidine produces genome-wide transcriptional changes that inform combination strategies. The term also intersects with immunometabolism, as TSA modulates macrophage phenotype and autophagy during polymicrobial sepsis. Understanding GO:0035984 helps researchers dissect how HDAC inhibition reshapes cellular behavior and how these responses can be harnessed or targeted in disease.
cellular response to trichostatin A At A Glance
| GO ID | GO:0035984 |
|---|---|
| GO term | cellular response to trichostatin A |
| Ontology | biological_process |
| Synonym | none |
| Major function | Cellular adaptation to HDAC inhibition by trichostatin A, including histone hyperacetylation, transcriptional reprogramming, and stress responses |
| Definition source | QuickGO |
| Related stimulus | Trichostatin A (TSA), a hydroxamic acid HDAC inhibitor |
| Key downstream processes | Gene expression changes, autophagy, anti-stress response, IGF/Akt signaling |
| Disease relevance | Cancer, inflammatory bowel disease, sepsis |
What Is GO:0035984?
According to QuickGO, GO:0035984 (cellular response to trichostatin A) is defined as 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 trichostatin A stimulus. In practice, this includes the immediate sensing of TSA, the inhibition of HDAC enzymes, the resulting histone hyperacetylation, and downstream transcriptional and signaling events that alter cell behavior.
Why Is cellular response to trichostatin A Important in Cell Biology?
GO:0035984 is important because trichostatin A is one of the most widely used experimental tools for probing chromatin biology and HDAC function, and the cellular response to TSA reveals how cells adapt to epigenetic perturbation. This term helps researchers interpret transcriptomic and phenotypic changes induced by TSA, from cancer cell sensitivity to immunomodulation. It also provides a framework for understanding how HDAC inhibitors affect normal and diseased cells, which is directly relevant to epigenetic therapy and inflammation research.
• TSA is a benchmark HDAC inhibitor used to study chromatin remodeling and gene expression.
• The response to TSA is selective: only a small fraction of genes change expression despite global histone hyperacetylation.
• Cancer cells show differential sensitivity to TSA versus other HDAC inhibitors, informing therapeutic selectivity.
• TSA enhances anti-stress responses via HDAC4 upregulation and IGF/Akt downregulation.
• TSA modulates macrophage phenotype and autophagy, linking HDAC inhibition to inflammation control.
• Genome-wide studies in multiple myeloma reveal cooperative effects of TSA with DNA-demethylating agents.
• The term is relevant to inflammatory bowel disease through microbiota metabolite and HDAC inhibition crosstalk.
• TSA response pathways intersect with hypoxia adaptation and DNA-dependent stress responses.
• Understanding TSA responses aids in designing combination epigenetic therapies.
• GO:0035984 provides a controlled framework for studying cellular adaptation to HDAC inhibition.
What Happens During cellular response to trichostatin A?
HDAC inhibition and histone hyperacetylation
In simple terms: TSA blocks enzymes that normally remove acetyl groups from histones, so histones become more acetylated.
Trichostatin A inhibits histone deacetylases, leading to rapid accumulation of acetylated histones and a more open chromatin state. This hyperacetylation is the initiating event of the cellular response and is observed across many cell types.
Selective transcriptional reprogramming
In simple terms: Even though many histones become acetylated, only some genes actually change their expression.
Genome-wide analyses show that only a small fraction of cellular genes change expression in response to histone hyperacetylation, indicating that the transcriptional response to TSA is selective and context-dependent. In multiple myeloma cells, TSA combined with 5-aza-2'-deoxycytidine produces widespread but specific transcriptional changes.
Anti-stress and survival signaling
In simple terms: Cells exposed to TSA can become more resistant to stress by adjusting specific survival pathways.
Cellular conditioning with TSA enhances the anti-stress response through up-regulation of HDAC4 and down-regulation of the IGF/Akt pathway. This suggests that TSA can reprogram survival signaling to protect cells under stress conditions.
Autophagy and immune modulation
In simple terms: TSA can change how immune cells behave, partly by increasing autophagy.
TSA modulates the macrophage phenotype by enhancing autophagy to reduce inflammation during polymicrobial sepsis. This links the cellular response to TSA with immunometabolic regulation and inflammatory disease.
Crosstalk with hypoxia and DNA stress responses
In simple terms: TSA responses can overlap with how cells handle low oxygen and DNA damage.
A DNA-dependent stress response involving DNA-PK occurs in hypoxic cells and contributes to cellular adaptation to hypoxia. This indicates that TSA-related HDAC inhibition may intersect with hypoxia and DNA damage response pathways.
Key Genes Involved in GO:0035984 cellular response to trichostatin A
The following genes and proteins are experimentally implicated in the cellular response to trichostatin A, based on the verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| HDAC4 | Histone deacetylase; upregulated by TSA conditioning | Mediates anti-stress response and IGF/Akt downregulation |
| IGF1 | Growth factor ligand in IGF/Akt pathway | Downregulated during TSA-induced anti-stress response |
| AKT1 | Serine/threonine kinase in survival signaling | Downregulated pathway component in TSA response |
| DNA-PK | DNA-dependent protein kinase; stress sensor | Involved in hypoxia adaptation and DNA stress response |
| MAP1LC3B | Autophagy marker | Increased autophagy in TSA-treated macrophages |
| BECN1 | Autophagy regulator | Contributes to TSA-enhanced autophagy in macrophages |
| IL6 | Pro-inflammatory cytokine | Modulated by TSA in macrophage inflammation models |
| TNF | Pro-inflammatory cytokine | Modulated by TSA in sepsis and inflammation models |
| HDAC1 | Histone deacetylase | Target of TSA; contributes to histone hyperacetylation |
| HDAC2 | Histone deacetylase | Target of TSA; contributes to histone hyperacetylation |
| HDAC3 | Histone deacetylase | Target of TSA; contributes to histone hyperacetylation |
| SIRT1 | NAD-dependent deacetylase | Related to hypothalamic GHR-SIRT1 axis and metabolic regulation |
| GHR | Growth hormone receptor | Linked to SIRT1 axis in fasting responses |
| CDKN1A | Cyclin-dependent kinase inhibitor p21 | Commonly induced by HDAC inhibitors including TSA |
| TP53 | Tumor suppressor | Modulates cellular sensitivity to HDAC inhibition |
| NFKB1 | Transcription factor subunit | Inflammatory signaling modulated by TSA |
| STAT3 | Transcription factor | Inflammation-related signaling affected by TSA |
| HIF1A | Hypoxia-inducible factor | Crosstalk with hypoxia and DNA-PK stress response |
How Is cellular response to trichostatin A Regulated?
The cellular response to trichostatin A is regulated at multiple levels. TSA directly inhibits HDAC enzymes, but the downstream response is shaped by compensatory changes in HDAC expression, such as upregulation of HDAC4. The IGF/Akt pathway is downregulated during TSA conditioning, which modulates survival and stress resistance. Autophagy-related proteins such as MAP1LC3B and BECN1 are upregulated in TSA-treated macrophages, contributing to anti-inflammatory effects. In hypoxic cells, DNA-PK-dependent stress responses intersect with HDAC inhibition to influence cellular adaptation. Additionally, metabolic and endocrine signals such as the hypothalamic GHR-SIRT1 axis may influence how cells respond to deacetylase inhibition.
cellular response to trichostatin A and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| HDAC4 | Anti-stress response and aging | HDAC4 knockout or overexpression in stress models |
| IGF1 | Growth and survival signaling | IGF1 knockdown or overexpression in TSA-treated cells |
| MAP1LC3B | Sepsis and autophagy | Macrophage-specific autophagy reporter models |
| DNA-PK | Hypoxia adaptation | Hypoxia chamber experiments with DNA-PK inhibitors |
| SIRT1 | Metabolic regulation and fasting | Hypothalamic SIRT1 knockout models |
Cancer and epigenetic therapy
Cancer cells show differential sensitivity to TSA compared with other HDAC inhibitors such as depsipeptide, indicating that the cellular response to TSA is context-dependent and relevant to epigenetic therapy. In multiple myeloma, TSA combined with 5-aza-2'-deoxycytidine produces genome-wide transcriptional changes that may inform combination treatment strategies.
Inflammation and sepsis
TSA modulates macrophage phenotype by enhancing autophagy, which reduces inflammation during polymicrobial sepsis. This connects GO:0035984 to innate immune regulation and suggests that HDAC inhibition could be explored in inflammatory conditions.
Inflammatory bowel disease and microbiota
Microbiota metabolite butyrate, which has HDAC inhibitory activity, constrains neutrophil functions and ameliorates mucosal inflammation in inflammatory bowel disease. This highlights how HDAC inhibition-related responses, similar to those triggered by TSA, may influence mucosal immunity.
Hypoxia and stress adaptation
A DNA-dependent stress response involving DNA-PK occurs in hypoxic cells and contributes to cellular adaptation to hypoxia. Since TSA affects HDAC activity, this pathway may intersect with the cellular response to TSA in stressed microenvironments.
From cellular response to trichostatin A-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does HDAC4 mediate TSA-induced anti-stress response? | HDAC4 knockout and overexpression cell lines |
| How does TSA affect autophagy in macrophages? | MAP1LC3B reporter macrophages and autophagy flux assays |
| Which genes are selectively induced by TSA? | RNA-seq of TSA-treated cancer cell lines |
| Does DNA-PK modulate TSA response under hypoxia? | Hypoxic cell culture with DNA-PK inhibitors or knockout |
| How does TSA alter inflammatory cytokine production? | Macrophage stimulation assays with cytokine profiling |
| Does SIRT1 influence TSA-related metabolic responses? | SIRT1 knockout or knockdown in hypothalamic cell models |
How to Study the cellular response to trichostatin A Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Global gene expression changes | Identifying TSA-responsive genes |
| ChIP-seq | Histone acetylation and chromatin state | Mapping hyperacetylation after TSA |
| Western blot | Protein levels and acetylation status | Detecting HDAC4, acetyl-histones |
| Autophagic flux assay | Autophagy activity | Macrophage response to TSA |
| Cytokine ELISA | Inflammatory mediator secretion | Sepsis and inflammation models |
| Hypoxia chamber | Cellular adaptation to low oxygen | DNA-PK stress response studies |
| Flow cytometry | Immune cell phenotype | Macrophage polarization analysis |
Transcriptomic profiling
RNA-seq and microarray analyses are used to identify genes whose expression changes in response to TSA, revealing selective transcriptional reprogramming.
Chromatin and histone acetylation assays
Western blotting with anti-acetyl-histone antibodies and ChIP-based methods measure histone hyperacetylation induced by TSA.
Autophagy and inflammation assays
LC3 lipidation assays, autophagic flux measurements, and cytokine profiling are used to study TSA effects on macrophage phenotype and inflammation.
Hypoxia and stress response experiments
Hypoxia chamber experiments combined with DNA-PK inhibition or knockdown help dissect crosstalk between TSA response and hypoxia adaptation.
How CRISPR Can Be Used to Study GO:0035984 cellular response to trichostatin A
Knockout
CRISPR knockout of candidate genes such as HDAC4, DNA-PK, or autophagy regulators can test their requirement for specific arms of the cellular response to TSA.
Point Mutation
Point mutations can be introduced into catalytic residues of HDACs or signaling kinases to dissect which enzymatic activities mediate TSA-induced transcriptional and phenotypic changes.
Knock-in
Knock-in of reporter tags or disease-relevant variants into genes such as MAP1LC3B or IGF1 allows real-time monitoring of TSA responses in live cells.
Overexpression
Overexpression of HDAC4 or SIRT1 can test whether increasing their levels mimics or enhances TSA-induced anti-stress and metabolic responses.
How EDITGENE Supports cellular response to trichostatin A Research
Researchers studying cellular response to trichostatin A-related genes often need to determine whether a candidate gene is causally involved in the response or merely correlated with it. EDITGENE provides CRISPR-based cell model services that enable precise genetic perturbations to test causality in TSA response pathways.
Contact EDITGENE today to design your custom CRISPR model for cellular response to trichostatin A research.
Frequently Asked Questions About cellular response to trichostatin A
What is GO:0035984?
GO:0035984 is the Gene Ontology term for cellular response to trichostatin A, describing any change in a cell's state or activity following exposure to the HDAC inhibitor trichostatin A.
What is trichostatin A?
Trichostatin A is a hydroxamic acid histone deacetylase inhibitor widely used to induce histone hyperacetylation and study chromatin regulation.
What genes are involved in cellular response to trichostatin A?
Genes implicated include HDAC4, IGF1, AKT1, DNA-PK, MAP1LC3B, BECN1, and inflammatory mediators such as IL6 and TNF.
How does trichostatin A affect gene expression?
TSA induces histone hyperacetylation but changes the expression of only a small fraction of genes, indicating a selective transcriptional response.
What is the role of HDAC4 in TSA response?
HDAC4 is upregulated during TSA conditioning and contributes to enhanced anti-stress response via downregulation of the IGF/Akt pathway.
Does trichostatin A affect autophagy?
Yes, TSA enhances autophagy in macrophages, which contributes to reduced inflammation during polymicrobial sepsis.
How is trichostatin A used in cancer research?
TSA is used to study HDAC inhibitor sensitivity in cancer cells, and its effects differ from other HDAC inhibitors like depsipeptide.
Can CRISPR be used to study TSA response genes?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models can test the causal role of specific genes in the TSA response.
What methods are used to study cellular response to trichostatin A?
Common methods include RNA-seq, ChIP-seq, Western blot, autophagic flux assays, cytokine ELISA, and hypoxia chamber experiments.
Why is cellular response to trichostatin A important for disease research?
It informs epigenetic therapy in cancer, inflammation control in sepsis, and mucosal immunity in inflammatory bowel disease.
Conclusion
GO:0035984, cellular response to trichostatin A, captures a well-defined biological process triggered by HDAC inhibition, encompassing histone hyperacetylation, selective transcriptional reprogramming, anti-stress signaling, and autophagy modulation. Its relevance spans cancer, inflammation, and metabolic regulation, making it a valuable framework for epigenetic and immunometabolic research. CRISPR-based models and multi-omics methods provide powerful tools to dissect the causal genes and pathways underlying this response.
References
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- 2. Chang J et al.. 2012. Differential response of cancer cells to HDAC inhibitors trichostatin A and depsipeptide.. Br J Cancer 106(1):116-25 PMID: 22158273
- 3. Chu F et al.. 2008. Cellular conditioning with trichostatin A enhances the anti-stress response through up-regulation of HDAC4 and down-regulation of the IGF/Akt pathway.. Aging Cell 7(4):516-25 PMID: 18489729
- 4. Van Lint C et al.. 1996. The expression of a small fraction of cellular genes is changed in response to histone hyperacetylation.. Gene Expr 5(4-5):245-53 PMID: 8723390
- 5. de Lima JBM et al.. 2021. Hypothalamic GHR-SIRT1 Axis in Fasting.. Cells 10(4) PMID: 33919674
- 6. Heller G et al.. 2008. Genome-wide transcriptional response to 5-aza-2'-deoxycytidine and trichostatin a in multiple myeloma cells.. Cancer Res 68(1):44-54 PMID: 18172295
- 7. Bouquet F et al.. 2011. A DNA-dependent stress response involving DNA-PK occurs in hypoxic cells and contributes to cellular adaptation to hypoxia.. J Cell Sci 124(Pt 11):1943-51 PMID: 21576354
- 8. Cui SN et al.. 2019. Trichostatin A modulates the macrophage phenotype by enhancing autophagy to reduce inflammation during polymicrobial sepsis.. Int Immunopharmacol 77:105973 PMID: 31677992
