[S100A4, a potential therapeutic target on bladder cancer stem cells]

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Context:

• Bladder cancer is a significant health concern, often characterized by recurrence and metastasis.
• Cancer stem cells (CSCs) play a crucial role in tumor initiation, progression, and therapeutic resistance.
• S100A4, a calcium-binding protein, has been implicated in various cancers, but its role in bladder CSCs requires further elucidation.

Purpose:

• To investigate the effect of S100A4 gene silencing using small interfering RNA (siRNA) on the proliferation and xenograft tumor formation of bladder cancer stem cells (CSCs).

Summary:

• S100A4 was identified as a highly differentially expressed protein in MB49 bladder cancer stem cells (MCSCs) using iTRAQ technology.
• Transfection of MCSCs with S100A4-targeting siRNA significantly reduced S100A4 expression at both mRNA and protein levels.
• siRNA-mediated S100A4 silencing suppressed MCSC proliferation and attenuated their ability to form xenograft tumors in vivo.

Impact:

• S100A4 is associated with bladder cancer recurrence and metastasis.
• Targeting S100A4 in bladder CSCs represents a promising therapeutic strategy for eliminating cancer stem cells and potentially preventing disease progression.