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Function of mutant and wild-type plexinb1 in prostate cancer cells
Adebiyi Damola1, Anne Legendre, Stephen Ball
1Prostate Cancer Research Centre, University College London, London, UK.
The Prostate
|June 19, 2013
Summary
PlexinB1 signaling, often altered in prostate cancer, can promote tumor cell invasion through ErbB2. Both normal and mutated plexinB1 are potential therapeutic targets in ErbB2-positive prostate tumors.
Area of Science:
- Cellular signaling pathways
- Cancer biology
- Molecular oncology
Background:
- Semaphorins and plexins regulate cell migration; plexinB1 mutations and overexpression are common in prostate tumors.
- The role of plexinB1 in prostate cancer progression remains unclear due to context-dependent signaling.
- Investigating plexinB1's function is crucial for understanding prostate cancer pathogenesis.
Purpose of the Study:
- To determine the role of plexinB1 signaling in prostate cancer cell behavior.
- To elucidate the downstream pathways activated by plexinB1 in prostate cancer.
- To assess the therapeutic potential of targeting plexinB1 in prostate tumors.
Main Methods:
- Prostate cancer cell lines were analyzed for migration, invasion, proliferation, and protein phosphorylation.
- Quantitative RT-PCR and immunoblotting were used to assess gene and protein expression.
- The effects of Sema4D stimulation on plexinB1 activation were evaluated.
Main Results:
- Prostate cancer cells exhibited diverse responses to Sema4D, the plexinB1 ligand.
- PlexinB1 activation enhanced migration, invasion, and growth in LNCaP cells via ErbB2 and Akt.
- Sema4D decreased motility and proliferation in PC3 cells, indicating context-dependent effects.
Conclusions:
- PlexinB1 signaling, through ErbB2, promotes an invasive phenotype in prostate cancer cells.
- Both wild-type and mutant plexinB1 are viable therapeutic targets in ErbB2-expressing prostate tumors.
- Targeting plexinB1 offers a potential strategy for anti-cancer therapy in specific prostate cancer contexts.
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