Small interfering RNA transfection against serum response factor mediates growth inhibition of benign prostatic...

Area of Science:

• Urology
• Cell Biology
• Molecular Medicine

Background:

• Urethral strictures often result in restenosis due to excessive fibroblast proliferation after traditional treatments like urethrotomy.
• Current minimally invasive methods for urethral strictures have suboptimal outcomes, necessitating novel therapeutic strategies.

Purpose of the Study:

• To investigate the potential of targeting serum response factor (SRF) to minimize excessive tissue proliferation in fibroblasts.
• To evaluate the efficacy of small interfering RNA (siRNA) mediated SRF knockdown in inhibiting fibroblast proliferation for potential urethral stricture treatment.

Main Methods:

• Primary prostatic fibroblasts from benign prostatic hyperplasia patients were transfected with SRF-targeting siRNA.
• SRF knockdown was confirmed at mRNA and protein levels using quantitative real-time PCR and Western blot.
• Cell proliferation was assessed using xCELLigence, BrdU assays, cell counting, and senescence assays.

Main Results:

• Specific and significant knockdown of SRF was achieved following siRNA transfection.
• SRF silencing led to a significant inhibition of fibroblast proliferation, particularly after the second transfection.
• The study demonstrated a substantial role for SRF in regulating prostatic fibroblast proliferation.

Conclusions:

• SRF plays a critical role in the proliferation of prostatic fibroblasts.
• SRF silencing presents a promising therapeutic approach to reduce tissue overgrowth and achieve a durably patent urethra in patients with urethral strictures.