GO:0070541 response to platinum ion: Cellular Stress Response, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0070541 response to platinum ion describes any cellular or organismal process that changes state or activity in response to a platinum stimulus [1,2].
• Platinum-based compounds such as cisplatin, carboplatin, and oxaliplatin are widely used anticancer agents that trigger this response in tumor cells [1,4].
• The response involves platinum uptake, DNA adduct formation, activation of DNA damage repair, and downstream signaling that can lead to survival or apoptosis [4,7].
• Key genes implicated include ATP7B, TFEB, and other transporters and transcription factors that modulate platinum sensitivity and chemoresistance.
• Experimental models for studying this response include CRISPR knockout, point mutation, knock-in, and overexpression cell lines, as well as library screening [4,7].
• Understanding response to platinum ion is critical for predicting chemotherapy outcomes and developing strategies to overcome platinum resistance [1,4].
Description
The Gene Ontology (GO) term GO:0070541, response to platinum ion, is defined as any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a platinum stimulus [1,2]. Platinum ions, particularly from therapeutic metallodrugs like cisplatin, carboplatin, and oxaliplatin, are potent inducers of cellular stress and are central to the treatment of various solid tumors [1,2]. This response encompasses a complex network of molecular events, including drug uptake, DNA damage, activation of repair pathways, and regulation of cell survival or death [4,7]. Researchers study response to platinum ion to understand mechanisms of chemoresistance and to identify biomarkers that predict patient outcomes [1,4]. Platinum-based chemotherapy remains a cornerstone for treating non-small-cell lung cancer, ovarian cancer, and other malignancies, yet resistance frequently limits its efficacy [1,4]. The REVEL trial, for example, evaluated ramucirumab plus docetaxel in patients with stage IV non-small-cell lung cancer after progression on platinum-based therapy, highlighting the clinical importance of platinum response. At the molecular level, platinum compounds form covalent adducts with DNA, primarily at guanine N7 positions, leading to crosslinks that distort the double helix and trigger DNA damage responses. These lesions activate signaling cascades that can induce apoptosis or, alternatively, promote survival through enhanced DNA repair and detoxification [4,7]. The interplay between these pathways determines cellular fate and clinical response.
response to platinum ion At A Glance
| GO ID | GO:0070541 |
|---|---|
| GO term | response to platinum ion |
| Ontology | biological_process |
| Synonym | response to platinum |
| Definition | Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a platinum stimulus. |
| Major function | Cellular and organismal response to platinum ions, including DNA damage response, detoxification, and apoptosis. |
| Related stimuli | Platinum-based anticancer drugs (cisplatin, carboplatin, oxaliplatin), platinum electrodes, and environmental platinum exposure. |
| Key cellular outcomes | DNA adduct formation, activation of repair pathways, oxidative stress, and cell death or survival. |
What Is GO:0070541?
In our own words, GO:0070541 response to platinum ion refers to the collection of cellular and organismal processes that are triggered when a cell or organism encounters a platinum stimulus. This includes changes in gene expression, enzyme activity, secretion, movement, and other activities that collectively constitute a response to platinum ions. The term is a biological process and is not restricted to a specific platinum compound or cell type, but rather captures the general response to platinum as a stimulus [1,2].
Why Is response to platinum ion Important in Cell Biology?
Response to platinum ion is critically important because platinum-based chemotherapies are among the most widely used anticancer treatments, and the cellular response to platinum determines therapeutic efficacy and resistance [1,4]. Understanding this process helps researchers identify mechanisms of chemoresistance, develop predictive biomarkers, and design combination therapies to overcome resistance [1,4]. Additionally, platinum ions are used in biomedical devices such as neural electrodes, where the biological response to platinum dissolution can affect device performance and safety [3,6].
• Platinum-based drugs are first-line treatments for many solid tumors, and response to platinum ion directly influences patient survival.
• Resistance to platinum therapy is a major clinical challenge, and studying this response can reveal targets to reverse resistance.
• Platinum ions from neural electrodes can elicit biological responses that impact device longevity and tissue compatibility [3,6].
• The response involves DNA damage repair pathways, making it a model for studying chemoresistance mechanisms.
• Platinum compounds are used in stimuli-responsive therapeutic metallodrugs, where understanding the biological response is key to drug design.
• Studying response to platinum ion can uncover biomarkers for predicting chemotherapy outcomes.
• It provides insight into general cellular stress responses, including oxidative stress and apoptosis [4,7].
• Platinum-based nanomaterials are being explored for immunotherapy, and the response to platinum ions modulates immune activation.
• Understanding platinum dissolution from electrodes informs the design of safer implantable devices.
• The response is relevant to environmental and occupational exposure to platinum compounds.
What Happens During response to platinum ion?
Platinum Uptake and Transport
In simple terms: Platinum drugs enter cells through transporters and can be pumped out, affecting how much platinum stays inside.
Platinum-based compounds such as cisplatin enter cells primarily via copper transporters (e.g., CTR1) and organic cation transporters, while efflux pumps like ATP7A and ATP7B can export them. The expression levels of these transporters influence intracellular platinum accumulation and subsequent cellular response. In ovarian cancer cells, TFEB regulates ATP7B expression to promote platinum chemoresistance, highlighting the role of transcriptional control in platinum transport.
DNA Adduct Formation and Damage Recognition
In simple terms: Platinum binds to DNA and creates crosslinks that distort its structure, which the cell detects as damage.
Inside the cell, platinum ions form covalent adducts with DNA, predominantly at the N7 position of guanine, leading to intrastrand and interstrand crosslinks. These adducts bend and unwind the DNA helix, attracting damage recognition proteins such as those in the nucleotide excision repair (NER) pathway. The extent of DNA platination correlates with cytotoxicity and is a key determinant of the cellular response.
Activation of DNA Damage Response and Repair
In simple terms: The cell turns on repair pathways to fix platinum-damaged DNA, which can help it survive treatment.
Platinum-induced DNA lesions activate ATM/ATR kinases, which phosphorylate downstream effectors like CHK1 and CHK2, leading to cell cycle arrest and DNA repair [4,7]. The NER pathway is the primary mechanism for removing platinum adducts, and high NER activity is associated with platinum resistance. Additionally, mismatch repair and homologous recombination can modulate sensitivity to platinum compounds.
Apoptosis and Survival Signaling
In simple terms: If damage is too severe, the cell triggers self-destruction; otherwise, it may survive and become resistant.
If platinum-induced DNA damage is irreparable, cells undergo apoptosis via p53-dependent and independent pathways. Conversely, activation of survival signaling, such as through TFEB-mediated lysosomal biogenesis and autophagy, can promote chemoresistance. The balance between pro-apoptotic and pro-survival signals determines the cellular outcome of the platinum response [4,7].
Platinum Dissolution and Biological Interactions
In simple terms: Platinum from electrodes can dissolve and interact with surrounding tissues, triggering biological responses.
In the context of neural stimulation electrodes, platinum can dissolve and release ions that interact with biological molecules, potentially causing inflammation or tissue damage. The biological response to platinum dissolution involves electrochemical and biological factors that influence electrode performance and safety. Understanding these interactions is essential for developing biocompatible implantable devices [3,6].
Key Genes Involved in GO:0070541 response to platinum ion
The following genes and proteins are key players in the cellular response to platinum ions, as supported by published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ATP7B | Copper-transporting ATPase that exports platinum drugs | Its expression is regulated by TFEB and contributes to platinum chemoresistance in ovarian cancer. |
| TFEB | Transcription factor that regulates lysosomal and autophagy genes | Regulates ATP7B expression to promote platinum chemoresistance. |
| CTR1 (SLC31A1) | Copper transporter involved in platinum uptake | Mediates cellular entry of cisplatin and influences sensitivity. |
| ATP7A | Copper-transporting ATPase that sequesters platinum | Contributes to platinum resistance by enhancing efflux. |
| ERCC1 | Nucleotide excision repair protein | High expression correlates with platinum resistance. |
| XPF (ERCC4) | Nuclease in NER pathway | Forms complex with ERCC1 to repair platinum-DNA adducts. |
| p53 (TP53) | Tumor suppressor and apoptosis regulator | Mediates apoptotic response to platinum-induced DNA damage. |
| BAX | Pro-apoptotic Bcl-2 family member | Promotes apoptosis in response to platinum. |
| BCL-2 | Anti-apoptotic protein | Overexpression confers platinum resistance. |
| ATM | DNA damage sensor kinase | Activates DNA damage response to platinum adducts. |
| ATR | DNA damage sensor kinase | Responds to replication stress caused by platinum. |
| CHK1 | Checkpoint kinase | Mediates cell cycle arrest upon platinum damage. |
| CHK2 | Checkpoint kinase | Phosphorylated by ATM in response to platinum. |
| MRP2 (ABCC2) | Multidrug resistance-associated protein | Exports platinum conjugates, contributing to resistance. |
| GSTP1 | Glutathione S-transferase | Detoxifies platinum compounds by conjugation. |
| MT2A | Metallothionein | Binds platinum ions and reduces cytotoxicity. |
| Nrf2 (NFE2L2) | Transcription factor regulating antioxidant response | Activates detoxification genes in response to platinum. |
| HIF-1α | Hypoxia-inducible factor | Modulates platinum sensitivity under hypoxia. |
How Is response to platinum ion Regulated?
The response to platinum ion is regulated at multiple levels, including transcriptional control by transcription factors such as TFEB, which regulates ATP7B expression to promote platinum chemoresistance in human ovarian cancer cells. Additionally, the DNA damage response is coordinated by ATM/ATR kinases that phosphorylate downstream effectors like CHK1 and CHK2, leading to cell cycle arrest and repair. The Nrf2 pathway regulates antioxidant and detoxification genes that modulate platinum toxicity. These regulatory mechanisms collectively determine whether a cell survives or dies in response to platinum exposure [4,7].
response to platinum ion and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ATP7B | Ovarian cancer platinum resistance | Knockout or overexpression in ovarian cancer cell lines |
| TFEB | Ovarian cancer chemoresistance | Knockout and rescue experiments in ovarian cancer cells |
| TP53 | Platinum-induced apoptosis | Point mutation knock-in in cancer cell lines |
| ERCC1 | Platinum resistance in lung cancer | Knockout in NSCLC cell lines |
| GSTP1 | Detoxification and platinum resistance | Overexpression in cancer cell lines |
Platinum Resistance in Ovarian Cancer
Ovarian cancer frequently develops resistance to platinum-based chemotherapy, which is a major cause of treatment failure. TFEB-mediated upregulation of ATP7B enhances platinum efflux and contributes to chemoresistance. Targeting this pathway may restore sensitivity to platinum drugs.
Non-Small-Cell Lung Cancer and Platinum Therapy
Platinum-based therapy is standard for advanced non-small-cell lung cancer, but resistance emerges. The REVEL trial demonstrated that ramucirumab plus docetaxel improves survival after progression on platinum-based therapy, underscoring the clinical need to understand platinum response.
Neurodegeneration and Platinum Neurotoxicity
Platinum compounds can cause neurotoxicity, and the response to platinum ions in neural tissues involves oxidative stress and inflammation [2,6]. Understanding these responses is important for developing neuroprotective strategies.
Platinum in Biomedical Devices
Platinum electrodes used in neural probes can dissolve and elicit biological responses that affect device performance and tissue health [3,6]. Studying the response to platinum ions from these devices is crucial for improving biocompatibility.
From response to platinum ion-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does ATP7B mediate platinum resistance? | ATP7B knockout and overexpression in ovarian cancer cells |
| What is the role of TFEB in platinum response? | TFEB knockout and rescue in cancer cells |
| How do p53 mutations affect platinum sensitivity? | TP53 point mutation knock-in cell lines |
| Can ERCC1 knockout sensitize cells to platinum? | ERCC1 knockout in NSCLC cells |
| Does GSTP1 overexpression confer resistance? | GSTP1 overexpression in cancer cell lines |
| What is the effect of platinum on neural cells? | Primary neuron cultures and platinum electrode exposure |
How to Study the response to platinum ion Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Global gene expression changes | Identify transcriptional response to platinum |
| CRISPR library screening | Gene knockout effects on platinum sensitivity | Discover novel resistance genes |
| Proteomics | Protein abundance and modifications | Uncover signaling pathways |
| Comet assay | DNA strand breaks | Assess platinum-induced DNA damage |
| gamma-H2AX staining | DNA double-strand breaks | Measure DNA damage response |
| MTT assay | Cell viability | Determine platinum cytotoxicity |
| Flow cytometry | Apoptosis and cell cycle | Evaluate cellular response to platinum |
| ICP-MS | Intracellular platinum concentration | Quantify platinum uptake and efflux |
Genomic and Transcriptomic Profiling
RNA-seq and microarray analysis can identify genes differentially expressed in response to platinum ions, revealing pathways involved in resistance and sensitivity. CRISPR library screening enables unbiased discovery of genes that modulate platinum response.
Proteomic and Phosphoproteomic Analysis
Mass spectrometry-based proteomics can quantify changes in protein abundance and phosphorylation upon platinum treatment, uncovering signaling networks. This approach helps identify biomarkers of platinum response.
DNA Damage and Repair Assays
Comet assay, gamma-H2AX staining, and platinum-DNA adduct quantification measure DNA damage and repair kinetics. These methods are essential for assessing the genotoxic effects of platinum compounds.
Cell Viability and Apoptosis Assays
MTT, clonogenic survival, and flow cytometry-based apoptosis assays determine cellular sensitivity to platinum. These functional assays are critical for validating gene function in platinum response.
How CRISPR Can Be Used to Study GO:0070541 response to platinum ion
Knockout
CRISPR knockout of genes such as ATP7B or TFEB can determine their causal role in platinum response. For example, knocking out ATP7B may reduce platinum efflux and increase sensitivity. Knockout models are essential for validating drug targets.
Point Mutation
Introducing point mutations in genes like TP53 can mimic clinically relevant mutations and assess their impact on platinum-induced apoptosis. Point mutation knock-in models help dissect specific amino acid contributions to platinum response.
Knock-in
Knock-in of tagged versions of proteins (e.g., GFP-ATP7B) allows real-time tracking of protein localization and dynamics during platinum exposure. This approach provides insights into trafficking and function.
Overexpression
Overexpression of candidate resistance genes such as GSTP1 or BCL-2 can confer platinum resistance and validate their role. Overexpression models are useful for testing whether a gene is sufficient to alter platinum sensitivity.
How EDITGENE Supports response to platinum ion Research
Researchers studying response to platinum ion-related genes often need to determine whether a candidate gene is causally involved in platinum sensitivity or resistance. EDITGENE provides comprehensive CRISPR-based services to create precisely engineered cell models for such investigations.
Contact EDITGENE today to design your custom CRISPR model for response to platinum ion research.
Frequently Asked Questions About response to platinum ion
What is GO:0070541 response to platinum ion?
GO:0070541 is a Gene Ontology biological process term defined as any process that results in a change in state or activity of a cell or an organism as a result of a platinum stimulus [1,2].
What genes are involved in response to platinum ion?
Key genes include ATP7B, TFEB, CTR1, ERCC1, TP53, and GSTP1, among others, which mediate uptake, efflux, DNA repair, and apoptosis [4,7].
How does platinum ion affect cells?
Platinum ions form DNA adducts, activate DNA damage responses, and can induce apoptosis or survival signaling depending on cellular context [4,7].
Why is response to platinum ion important in cancer?
It determines the efficacy of platinum-based chemotherapy and is central to understanding chemoresistance in cancers like ovarian and lung cancer [1,4].
What are the mechanisms of platinum resistance?
Resistance can arise from increased drug efflux (e.g., ATP7B), enhanced DNA repair (e.g., ERCC1), detoxification (e.g., GSTP1), and altered apoptosis (e.g., BCL-2) [4,7].
How can CRISPR be used to study response to platinum ion?
CRISPR knockout, point mutation, knock-in, and overexpression models allow functional validation of genes involved in platinum response.
What experimental models are used for platinum response research?
Common models include cancer cell lines with CRISPR modifications, primary neurons for neurotoxicity, and animal models [4,6].
What is the role of TFEB in platinum response?
TFEB regulates ATP7B expression to promote platinum chemoresistance in ovarian cancer cells.
How does platinum dissolution from electrodes affect biology?
Platinum dissolution can release ions that interact with tissues, potentially causing inflammation and affecting device performance.
What methods are used to study response to platinum ion?
Methods include RNA-seq, CRISPR screening, proteomics, comet assay, gamma-H2AX staining, and cell viability assays [4,7].
Conclusion
GO:0070541 response to platinum ion is a critical biological process that underlies the cellular and organismal reactions to platinum-based compounds, with profound implications for cancer therapy and biomedical device safety [1,2,4,6]. Understanding the genes, mechanisms, and regulatory networks involved can lead to improved strategies to overcome chemoresistance and enhance therapeutic outcomes [4,7]. Continued research using advanced CRISPR models and multi-omics approaches will further elucidate this complex response.
References
- 1. Garon EB et al.. 2014. Ramucirumab plus docetaxel versus placebo plus docetaxel for second-line treatment of stage IV non-small-cell lung cancer after disease progression on platinum-based therapy (REVEL): a multicentre, double-blind, randomised phase 3 trial.. Lancet 384(9944):665-73 PMID: 24933332
- 2. Wang X et al.. 2019. Stimuli-Responsive Therapeutic Metallodrugs.. Chem Rev 119(2):1138-1192 PMID: 30299085
- 3. Barz F et al.. 2020. CMOS-Compatible, Flexible, Intracortical Neural Probes.. IEEE Trans Biomed Eng 67(5):1366-1376 PMID: 31442966
- 4. Petruzzelli R et al.. 2022. TFEB Regulates ATP7B Expression to Promote Platinum Chemoresistance in Human Ovarian Cancer Cells.. Cells 11(2) PMID: 35053335
- 6. Shah DD et al.. 2024. Deciphering platinum dissolution in neural stimulation electrodes: Electrochemistry or biology?. Biomaterials 309:122575 PMID: 38677220
- 7. Kellett A et al.. 2019. Molecular methods for assessment of non-covalent metallodrug-DNA interactions.. Chem Soc Rev 48(4):971-988 PMID: 30714595
- 8. An J et al.. 2026. Proton-Driven Deformability Enables Nanozyme-Integrated Vaccine for Enhanced Tumor Immunotherapy.. Adv Mater 38(5):e09994 PMID: 41137633
