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Updated: Apr 20, 2026

Phosphopeptide Enrichment Coupled with Label-free Quantitative Mass Spectrometry to Investigate the Phosphoproteome in Prostate Cancer
Published on: August 2, 2018
Contribution of phosphoproteomics in understanding SRC signaling in normal and tumor cells
Audrey Sirvent1, Serge Urbach, Serge Roche
1CNRS UMR5237, University Montpellier 1 and 2, CRBM, Montpellier, France.
Abstract:
The membrane-anchored, non-receptor tyrosine kinase (non-RTK) SRC is a critical regulator of signal transduction induced by a large variety of cell-surface receptors, including RTKs that bind to growth factors to control cell growth and migration. When deregulated, SRC shows strong oncogenic activity, probably because of its capacity to promote RTK-mediated downstream signaling even in the absence of extracellular stimuli. Accordingly, SRC is frequently deregulated in human cancer and is thought to play important roles during tumorigenesis. However, our knowledge on the molecular mechanism by which SRC controls signaling is incomplete due to the limited number of key substrates identified so far. Here, we review how phosphoproteomic methods have changed our understanding of the mechanisms underlying SRC signaling in normal and tumor cells and discuss how these novel findings can be used to improve therapeutic strategies aimed at targeting SRC signaling in human cancer.
Insights
The SRC tyrosine kinase (SRC) is crucial for cell signaling and growth. Deregulated SRC drives cancer, and new phosphoproteomic insights reveal its mechanisms, aiding targeted cancer therapies.
Area of Science:
- Cellular Biology
- Molecular Oncology
- Biochemistry
Background:
- The SRC tyrosine kinase (SRC) is a key regulator of signal transduction pathways initiated by cell-surface receptors.
- SRC plays a critical role in cell growth, migration, and survival.
- Deregulated SRC activity is implicated in human cancer development and progression.
Purpose of the Study:
- To review the impact of phosphoproteomic methods on understanding SRC signaling mechanisms.
- To explore the role of SRC in normal and tumor cells.
- To discuss therapeutic strategies targeting SRC signaling in cancer.
Main Methods:
- Review of phosphoproteomic studies identifying SRC substrates.
- Analysis of SRC's role in receptor tyrosine kinase (RTK) signaling.
- Integration of findings for therapeutic strategy development.
Main Results:
- Phosphoproteomics has significantly expanded the known SRC substrate repertoire.
- SRC promotes RTK-mediated signaling, contributing to oncogenesis even without external stimuli.
- SRC deregulation is a common event in human cancers.
Conclusions:
- Novel insights from phosphoproteomics are refining our understanding of SRC signaling pathways.
- Targeting SRC signaling presents a promising therapeutic avenue for various human cancers.
- Further research into SRC substrates and regulation is vital for effective cancer treatment.
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