
This AOP is licensed under a Creative Commons Attribution 4.0 International License.
Aop: 298
Title
Chronic reactive oxygen species leading to human treatment-resistant gastric cancer
Short name
Graphical Representation
Point of Contact
Contributors
- Shihori Tanabe
- Agnes Aggy
Status
Author status | OECD status | OECD project | SAAOP status |
---|---|---|---|
Open for comment. Do not cite | EAGMST Under Review | 1.58 | Included in OECD Work Plan |
This AOP was last modified on July 16, 2022 18:37
Revision dates for related pages
Page | Revision Date/Time |
---|---|
Epithelial-mesenchymal transition | May 13, 2021 01:37 |
Treatment-resistant gastric cancer | May 13, 2021 02:10 |
Chronic reactive oxygen species | November 09, 2021 00:35 |
Sustained tissue damage / macrophage activation / porcupine-induced Wnt secretion | May 13, 2021 22:29 |
Proliferation / beta-catenin activation | May 13, 2021 01:36 |
Increases in cellular reactive oxygen species | May 10, 2022 21:44 |
Chronic ROS leads to Sustained tissue damage, macrophage activation and Wnt secretion | May 13, 2021 02:22 |
Increases in cellular ROS leads to Sustained tissue damage, macrophage activation and Wnt secretion | April 27, 2022 01:24 |
Sustained tissue damage, macrophage activation and Wnt secretion leads to Proliferation / beta-catenin activation | November 09, 2021 01:23 |
Proliferation / beta-catenin activation leads to Epithelial-mesenchymal transition | November 09, 2021 01:58 |
Epithelial-mesenchymal transition leads to Resistant gastric cancer | May 13, 2021 03:08 |
Wnt | May 29, 2019 03:59 |
WNT2 | May 29, 2019 03:59 |
Porcupine | January 19, 2020 21:19 |
Wntless | January 19, 2020 21:20 |
Ionizing Radiation | May 07, 2019 12:12 |
ferric nitrilotriacetate | May 27, 2020 02:40 |
Abstract
The injury or sustained reactive oxygen species (ROS) causes resistance in human gastric cancer. This AOP entitled “Chronic reactive oxygen species leading to human treatment-resistant gastric cancer” consists of MIE (KE1753) as chronic ROS, followed by KE1 (KE1754) as sustained tissue damage / macrophage activation / porcupine-induced Wnt secretion, KE2 (KE1755) as proliferation / beta-catenin activation, KE3 (KE1650) as epithelial-mesenchymal transition (EMT), and AO (KE1651) as human treatment-resistant gastric cancer. ROS has multiple roles such as development and progression of cancer, or apoptotic induction causing anti-tumor effects. In this AOP, we focus on the role of chronic ROS with sustained level to induce the therapy-resistance in human gastric cancer. EMT, which is cellular phenotypic change from epithelial to mesenchymal-like feature, demonstrates cancer stem cell-like characteristics in human gastric cancer. EMT is induced by Wnt/beta-catenin signaling, which confers rationale to have Wnt secretion and beta-catenin activation as KE1 and KE2 on the AOP, respectively.
AOP Development Strategy
Context
Strategy
Summary of the AOP
Events:
Molecular Initiating Events (MIE)
Key Events (KE)
Adverse Outcomes (AO)
Type | Event ID | Title | Short name |
---|
MIE | 1753 | Chronic reactive oxygen species | Chronic ROS |
KE | 1940 | Increases in cellular reactive oxygen species | Increases in cellular ROS |
KE | 1754 | Sustained tissue damage / macrophage activation / porcupine-induced Wnt secretion | Sustained tissue damage, macrophage activation and Wnt secretion |
KE | 1755 | Proliferation / beta-catenin activation | Proliferation / beta-catenin activation |
KE | 1650 | Epithelial-mesenchymal transition | Epithelial-mesenchymal transition |
AO | 1651 | Treatment-resistant gastric cancer | Resistant gastric cancer |
Relationships Between Two Key Events (Including MIEs and AOs)
Title | Adjacency | Evidence | Quantitative Understanding |
---|
Chronic ROS leads to Sustained tissue damage, macrophage activation and Wnt secretion | adjacent | Moderate | Moderate |
Increases in cellular ROS leads to Sustained tissue damage, macrophage activation and Wnt secretion | adjacent | Moderate | Moderate |
Sustained tissue damage, macrophage activation and Wnt secretion leads to Proliferation / beta-catenin activation | adjacent | Moderate | Moderate |
Proliferation / beta-catenin activation leads to Epithelial-mesenchymal transition | adjacent | Moderate | Moderate |
Epithelial-mesenchymal transition leads to Resistant gastric cancer | adjacent | Moderate | Moderate |
Network View
Prototypical Stressors
Life Stage Applicability
Life stage | Evidence |
---|---|
All life stages | High |
Taxonomic Applicability
Term | Scientific Term | Evidence | Link |
---|---|---|---|
Homo sapiens | Homo sapiens | High | NCBI |
Sex Applicability
Sex | Evidence |
---|---|
Unspecific | High |
Overall Assessment of the AOP
1. Support for Biological Plausibility of KERs |
|
MIE => KE1: Chronic ROS leads to Sustained tissue damage / macrophage activation / porcupine-induced Wnt secretion |
Biological Plausibility of the MIE => KE1 is moderate. |
KE1 => KE2: Sustained tissue damage / macrophage activation / porcupine-induced Wnt secretion leads to Proliferation / beta-catenin activation |
Biological Plausibility of the KE1 => KE2 is moderate. |
Rationale: Secreted Wnt ligand stimulates Wnt/beta-catenin signaling, in which beta-catenin is activated. Wnt ligand binds to Frizzled receptor, which leads to GSK3beta inactivation. GSK3beta inactivation leads to beta-catenin dephosphorylation, which avoids the ubiquitination of the beta-catenin and stabilize the beta-catenin (Clevers & Nusse, 2012). |
|
KE2 => KE3: Proliferation / beta-catenin activation leads to Epithelial-mesenchymal transition (EMT) |
Biological Plausibility of the KE2 => KE3 is moderate. |
Rationale: Beta-catenin activation, of which mechanism include the stabilization of the dephosphorylated beta-catenin and translocation of beta-catenin into the nucleus, induces the formation of beta-catenin-TCF complex and transcription of transcription factors such as Snail, Zeb and Twist (Clevers & Nusse, 2012) (Ahmad et al., 2012; Pearlman, Montes de Oca, Pal, & Afaq, 2017; Sohn et al., 2019; W. Yang et al., 2019). |
|
EMT-related transcription factors including Snail, ZEB and Twist are up-regulated in cancer cells (Diaz, Vinas-Castells, & Garcia de Herreros, 2014). The transcription factors such as Snail, ZEB and Twist bind to E-cadherin (CDH1) promoter and inhibit the CDH1 transcription via the consensus E-boxes (5’-CACCTG-3’ or 5’-CAGGTG-3’), which leads to EMT (Diaz et al., 2014). |
|
KE3 => AO: Epithelial-mesenchymal transition (EMT) leads to human treatment-resistant gastric cancer |
Biological Plausibility of the KE3 => AO is moderate. |
Rationale: Some population of the cells exhibiting EMT demonstrates the feature of cancer stem cells (CSCs), which are related to cancer malignancy (Shibue & Weinberg, 2017; Shihori Tanabe, 2015a, 2015b; Tanabe, Aoyagi, Yokozaki, & Sasaki, 2015). |
|
EMT phenomenon is related to cancer metastasis and cancer therapy resistance (Smith & Bhowmick, 2016; Tanabe, 2013). The increase in expression of enzymes that degrade the extracellular matrix components and the decrease in adhesion to the basement membrane in EMT induce the cell escape from the basement membrane and metastasis (Smith & Bhowmick, 2016). Morphological changes observed during EMT are associated with therapy resistance (Smith & Bhowmick, 2016). |
|
2. Support for essentiality of KEs |
|
KE1: Sustained tissue damage / macrophage activation / porcupine-induced Wnt secretion |
Essentiality of the KE1 is moderate. |
Rationale for Essentiality of KEs in the AOP: The sustained tissue damage, macrophage activation and Wnt are essential for the subsequent beta-catenin activation and cancer resistance. |
|
KE2: Proliferation / beta-catenin activation |
Essentiality of the KE2 is moderate. |
Rationale for Essentiality of KEs in the AOP: Proliferation and beta-catenin activation are essential for the Wnt-induced cancer resistance. |
|
KE3: Epithelial-mesenchymal transition (EMT) |
Essentiality of the KE3 is moderate. |
Rationale for Essentiality of KEs in the AOP: EMT is essential for the Wnt-induced cancer promotion and resistance to anti-cancer drug. |
|
3. Empirical support for KERs |
|
MIE => KE1: Chronic ROS leads to Sustained tissue damage / macrophage activation / porcupine-induced Wnt secretion |
Empirical Support of the MIE => KE1 is moderate. |
ROS signaling induces Wnt/beta-catenin signaling (Pérez et al., 2017). |
|
KE1 => KE2: Sustained tissue damage / macrophage activation / porcupine-induced Wnt secretion leads to Proliferation / beta-catenin activation |
Empirical Support of the KE1 => KE2 is moderate. |
Rationale: Sustained ROS increases caused by/causes DNA damage, which will alter several signaling pathways including Wnt signaling. Macrophages accumulate into injured tissue to recover the tissue damage, which may be followed by porcupine-induced Wnt secretion, which then activates beta-catenin leading to proliferation. |
|
Wnt binds to FZD and activate the Wnt signaling (Clevers & Nusse, 2012; Janda, Waghray, Levin, Thomas, & Garcia, 2012; Nile et al., 2017). Wnt binding towards FZD induce the formation of the protein complex with LRP5/6 and DVL, leading to the down-stream signaling activation including beta-catenin (Clevers & Nusse, 2012). |
|
KE2 => KE3: Proliferation / beta-catenin activation leads to Epithelial-mesenchymal transition (EMT) |
Empirical Support of the KE2 => KE3 is moderate. |
Rationale: Proliferation and beta-catenin activation induces the key transcription factors in EMT. Translocation of beta-catenin into the nucleus by Wnt/beta-catenin signaling pathway activation promotes EMT. |
|
The inhibition of c-MET, which is overexpressed in diffuse-type gastric cancer, induced increase in phosphorylated beta-catenin, decrease in beta-catenin and Snail (Sohn et al., 2019). |
|
The garcinol, which has an anti-cancer effect, increases phosphorylated beta-catenin, decreases beta-catenin and ZEB1/ZEB2, and inhibits EMT (Ahmad et al., 2012). |
|
The inhibition of sortilin by AF38469 (a sortilin inhibitor) or small interference RNA (siRNA) results in a decrease in beta-catenin and Twist expression in human glioblastoma cells (W. Yang et al., 2019). |
|
Histone deacetylase inhibitors affect EMT-related transcription factors including ZEB, Twist and Snail (Wawruszak et al., 2019). |
|
Snail and Zeb induces EMT and suppress E-cadherin (CDH1) (Batlle et al., 2000; Diaz et al., 2014; Peinado, Olmeda, & Cano, 2007). |
|
KE3 => AO: Epithelial-mesenchymal transition (EMT) leads to human treatment-resistant gastric cancer |
Empirical Support of the KE3 => AO is moderate. |
Rationale: EMT induces the expression of genes such as transporters of anti-cancer drug, which promotes anti-cancer drug resistance. EMT induces migration and metastasis of cancer cells, and share the phenotype of cancer stem cells, which is one of the hallmarks of human treatment-resistant gastric cancer (Tanabe et al., 2020a, 2020b). |
|
EMT activation induces the expression of multiple members of the ATP-binding cassette (ABC) transporter family, which results in the resistance to doxorubicin (Saxena, Stephens, Pathak, & Rangarajan, 2011; Shibue & Weinberg, 2017). |
|
TGFbeta-1 induced EMT results in the acquisition of cancer stem cell (CSC) like properties (Pirozzi et al., 2011; Shibue & Weinberg, 2017). |
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Snail-induced EMT induces cancer metastasis and resistance to dendritic cell-mediated immunotherapy (Kudo-Saito et al., 2009). |
|
Zinc finger E-box-binding homeobox (ZEB1)-induced EMT results in the relief of miR-200-mediated repression of programmed cell death 1 ligand (PD-L1) expression, a major inhibitory ligand for the programmed cell death protein (PD-1) immune-checkpoint protein on CD8+ cytotoxic T lymphocyte (CTL), subsequently the CD8+ T cell immunosuppression and metastasis (Chen et al., 2014). |
Domain of Applicability
Homo sapiens
Essentiality of the Key Events
Sustained ROS contributes into the initiation and development of human gastric cancer (Gu H. 2018).
Wnt signaling is involved in cancer malignancy (Tanabe, 2018).
Upon stimulation with Wnt ligand to Frizzled receptor, Wnt/beta-catenin signaling is activated. Wnt/beta-catenin consists of GSK3 beta inactivation, beta-catenin activation and up-regulation of transcription factors such as Zeb, Twist and Snail. The transcription factors Zeb, Twist and Snail relate to the activation of EMT-related genes. EMT is regulated with various gene networks (Tanabe, 2015c).
Evidence Assessment
The Wnt signaling promotes EMT and cancer malignancy in colorectal cancer (Lazarova & Bordonaro, 2017). Although the potential pathways other than Wnt signaling exist in EMT induction and the mechanism underlaid cancer malignancy, Wnt signaling is one of the main pathways to induce EMT and cancer malignancy (Polakis, 2012).
Known Modulating Factors
Quantitative Understanding
Wnt signaling activates the CSCs to promote cancer malignancy (Reya & Clevers, 2005). The responses in KEs related to Wnt signaling, Frizzled activation, GSK3beta inactivation, beta-catenin activation, Snail, Zeb, Twist activation are dose-dependently related. The quantification of EMT and cancer malignancy would require the further investigation.
Considerations for Potential Applications of the AOP (optional)
AOP entitled “Chronic reactive oxygen species leading to human treatment-resistant gastric cancer” might be utilized for the development and risk assessment of anti-cancer drugs. EMT is involved in the acquisition of drug resistance, which is one of the critical features of cancer malignancy. The assessment of EMT would be the potential prediction of the adverse effects of anti-cancer drugs.
References
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