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Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
Published on: June 7, 2019
WDR74 modulates melanoma tumorigenesis and metastasis through the RPL5-MDM2-p53 pathway
Yumei Li1, Yu Zhou1, Bifei Li1
1Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, 350116, Fujian, China.
Abstract:
The key molecules and underlying mechanisms of melanoma metastasis remain poorly understood. Using isobaric tag for relative and absolute quantitation (iTRAQ) proteomic screening, probing of patients' samples, functional verification, and mechanistic validation, we identified the important role of the WD repeat-containing protein 74 (WDR74) in melanoma progression and metastasis. Through gain- and loss-of-function approaches, WDR74 was found to promote cell proliferation, apoptosis resistance, and aggressive behavior in vitro. Moreover, WDR74 contributed to melanoma growth and metastasis in vivo. Mechanistically, WDR74 modulates RPL5 protein levels and consequently regulates MDM2 and insulates the ubiquitination degradation of p53 by MDM2. Our study is the first to reveal the oncogenic role of WDR74 in melanoma progression and the regulatory effect of WDR74 on the RPL5-MDM2-p53 pathway. Collectively, WDR74 can serve as a candidate target for the prevention and treatment of melanoma in the clinic.
Insights
Researchers identified WD repeat-containing protein 74 (WDR74) as a key driver of melanoma progression and metastasis. This protein promotes cancer cell growth and survival, offering a potential new target for melanoma treatment.
Area of Science:
- Oncology
- Molecular Biology
- Proteomics
Background:
- Melanoma metastasis mechanisms are not fully understood.
- Identifying key molecules driving melanoma progression is crucial for developing effective treatments.
Purpose of the Study:
- To identify novel molecular players involved in melanoma progression and metastasis.
- To elucidate the role and mechanism of WD repeat-containing protein 74 (WDR74) in melanoma.
Main Methods:
- Isobaric tag for relative and absolute quantitation (iTRAQ) proteomic screening.
- Gain- and loss-of-function studies in vitro and in vivo.
- Analysis of the RPL5-MDM2-p53 signaling pathway.
Main Results:
- WD repeat-containing protein 74 (WDR74) was identified as a key factor in melanoma.
- WDR74 promotes melanoma cell proliferation, apoptosis resistance, and aggressive behavior.
- WDR74 regulates the RPL5-MDM2-p53 pathway, impacting p53 stability.
Conclusions:
- WDR74 plays a significant oncogenic role in melanoma progression and metastasis.
- WDR74's regulation of the RPL5-MDM2-p53 pathway is a novel finding.
- WDR74 represents a potential therapeutic target for melanoma treatment.
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