Effects of Docosahexaenoic Acid on Prostate Cancer

Area of Science:

• Biochemistry
• Oncology
• Molecular Biology

Background:

• Omega-3 polyunsaturated fatty acids possess antitumor properties, particularly in prostate cancer (PCa).
• Docosahexaenoic acid (DHA) exhibits higher biological activity than other omega-3s, with a notable impact on PCa.
• Previous research often used omega-3 blends, obscuring DHA's specific mechanisms and therapeutic potential.

Purpose of the Study:

• To elucidate the distinct biological roles and tumor-suppressive mechanisms of docosahexaenoic acid (DHA) in prostate cancer (PCa).
• To differentiate the effects of DHA from general omega-3 fatty acids in PCa progression.
• To review in vitro and in vivo evidence detailing DHA's specific actions on PCa cells and the tumor microenvironment.

Main Methods:

• Review of in vitro studies examining DHA's effects on PCa cell lines.
• Analysis of in vivo studies investigating DHA's impact on PCa development and progression.
• Examination of molecular and cellular pathways affected by DHA in normal and malignant PCa cells.

Main Results:

• DHA is differentially processed by normal and malignant PCa cells, suggesting a tumor suppressor function.
• At the cellular level, DHA downregulates androgen signaling and lipid metabolism, disrupts membrane phospholipid balance, induces cell cycle arrest, apoptosis, and reactive oxygen species (ROS) overproduction.
• At the tissue level, DHA inhibits cancer-associated fibroblast differentiation and resolves inflammation, altering the PCa microenvironment.

Conclusions:

• DHA exerts specific tumor-suppressive effects in prostate cancer through various cellular and tissue-level mechanisms.
• Understanding DHA's unique actions is crucial for developing targeted therapeutic strategies for PCa.
• The distinct biological activity of DHA warrants its consideration as a specific therapeutic agent in PCa management.