Cardiolipin composition correlates with prostate cancer cell proliferation

Area of Science:

• Oncology
• Nutritional Science
• Molecular Biology

Background:

• Diet significantly impacts prostate cancer (PC) development and progression.
• Free fatty acids are recognized as key modulators of cell proliferation.
• Mitochondrial phospholipid cardiolipin (CL) composition is increasingly linked to cell proliferation.

Purpose of the Study:

• To investigate the relationship between cardiolipin (CL) composition and prostate cell proliferation.
• To analyze how different fatty acids affect CL composition and PC-3 cell proliferation.
• To compare CL profiles in tumor versus normal prostate tissue from PC patients.

Main Methods:

• PC-3 prostate cancer cells were exposed to various fatty acids.
• Lipidomic analysis was performed to determine CL composition.
• CL composition was analyzed in prostate tissues from PC patients post-prostatectomy.

Main Results:

• Palmitic acid stimulated PC-3 cell proliferation; oleic acid (OA) inhibited it.
• Fatty acids were incorporated into CL molecules in PC-3 cells.
• Palmitoleic acid content in CL exclusively correlated with PC-3 cell proliferation.
• Tumor prostate tissue showed significantly different CL composition compared to normal tissue, with higher palmitoleic acid in 5/6 patients.
• OA effectively reduced palmitoleic acid in CL and slowed PC-3 cell proliferation.

Conclusions:

• Cellular CL composition is readily modifiable by the surrounding fatty acid environment.
• Oleic acid (OA) demonstrates a potent ability to decrease palmitoleic acid in CL and inhibit prostate cancer cell proliferation.
• A diet abundant in OA may offer protective benefits against aggressive prostate cancer cell proliferation.