Non-canonical Wnt co-receptors ROR1/ROR2 are differentially regulated by hypoxia in colon cancer cells
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View abstract on PubMed
Summary
This summary is machine-generated.Hypoxia promotes aggressive colon cancer by activating non-canonical Wnt signaling via ROR1/ROR2 co-receptors, which are regulated by Hypoxia Inducible Factors (HIFs). Blocking these receptors inhibits cancer cell migration and metastasis.
Area Of Science
- Oncology
- Molecular Biology
- Cancer Research
Background
- ROR1 and ROR2 co-receptors mediate non-canonical Wnt signaling, promoting aggressive phenotypes in cancers like colon cancer.
- Hypoxia-Inducible Factors (HIFs) are key mediators of tumor progression under hypoxic conditions.
Purpose Of The Study
- To investigate the role of ROR1 and ROR2 co-receptors in colon cancer progression under hypoxic conditions.
- To elucidate the regulatory mechanisms of ROR1/ROR2 expression by HIFs in colon cancer.
Main Methods
- In silico analysis to assess ROR2 expression in colon cancer stages.
- In vitro studies involving ROR1/ROR2 blockade and gene silencing in colon cancer cells.
- Xenografted mice model to evaluate metastatic potential.
- Investigation of HIF subunit (HIF-1α, HIF-2α, HIF-3α) roles in ROR1/ROR2 regulation.
Main Results
- ROR1 and ROR2 are overexpressed in malignant colon cells and advanced stages, correlating with aggressive phenotypes.
- Blocking ROR1 or ROR2 impaired colon cancer cell proliferation, colony formation, and migration.
- Silencing ROR2 inhibited metastasis in vivo.
- HIF-2α and HIF-3α, but not HIF-1α, significantly decreased ROR1/ROR2 protein levels.
- Hypoxia increased ROR1/ROR2 expression, repressed β-catenin activity, and promoted migration/metastasis.
Conclusions
- Hypoxia-induced regulation of ROR1/ROR2 by HIFs is crucial for colon cancer cell migration and metastasis.
- Targeting ROR1/ROR2 represents a potential therapeutic strategy for aggressive colon cancer.
- Non-canonical Wnt signaling, modulated by hypoxia and HIFs, drives invasive phenotypes in colon cancer.
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