Human periprostatic adipose tissue: its influence on prostate cancer cells

Area of Science:

• Oncology
• Cell Biology
• Biochemistry

Background:

• The tumor microenvironment, including adipose tissue, plays a critical role in cancer progression.
• Periprostatic adipose tissue (PPAT) surrounding the prostate gland is increasingly recognized for its influence on prostate cancer (PCa).
• Previous studies have not comparatively analyzed PPAT from benign prostatic hyperplasia (BPH) patients versus PCa patients.

Purpose of the Study:

• To investigate the differential effects of factors secreted by PPAT from BPH (BPPAT) and clinically primary PCa (TPPAT) patients.
• To determine the impact of these PPAT-derived factors on the behavior of androgen-dependent (LNCaP) and castration-resistant (PC3) PCa cell lines.

Main Methods:

• Conditioned media (CM) were generated from PPAT samples of BPH and PCa patients.
• LNCaP and PC3 cells were exposed to BPPAT-CM and TPPAT-CM.
• Assays included cell adhesion, proliferation, migration, and matrix metalloproteinase (MMP) expression analysis.

Main Results:

• Neither BPPAT-CM nor TPPAT-CM significantly altered LNCaP or PC3 cell proliferation or motility.
• LNCaP cell adhesion to TPPAT-CM components was significantly reduced compared to adhesion to BPPAT-CM.
• TPPAT-CM significantly increased pro-matrix metalloproteinase-9 (pro-MMP-9) activity in LNCaP cells, but not PC3 cells.

Conclusions:

• Secreted factors from TPPAT, notably pro-MMP-9, may enhance the invasive potential of LNCaP cells.
• PPAT-derived factors could potentially modulate prostate cancer progression, particularly in the early stages.
• Further research is warranted to elucidate the specific mechanisms and clinical implications.