Andean Berry (Vaccinium meridionale Swartz) Juice Promotes Cytotoxic and Proapoptotic Effects in Human Early-Stage...

Andean berry (Vaccinium meridionale Swartz) is an underutilized fruit that could serve as a source of bioactive compounds with biological properties associated with apoptosis and cytotoxicity in colorectal cancer cells. This study aimed to evaluate the cytotoxic and proapoptotic effects of Andean berry juice (ABJ) in human SW480 and SW620 colon cancer cell lines, which represent early-stage and metastatic colorectal cancer, respectively. The juice was prepared from freeze-dried fruits, and several concentrations were assayed in cells. Bioactive compounds in ABJ showed the strongest reductions in metabolic activity and proliferation observed in SW620 cells. ABJ treatments promoted early apoptosis while inducing cell cycle arrest in the S phase (SW480) and in the G2/M (SW620). Mild mitochondrial depolarization was observed, while increased reactive oxygen species (ROS) accumulation was detected in both cell lines. More proteins involved in the apoptotic process were modulated in SW620 cells, whereas SW480 displayed greater fold changes in regulatory and stress-response proteins. Proteomics and bioinformatics analyses suggested that extrinsic apoptosis predominated in SW480 cells, whereas intrinsic apoptosis was observed in SW620 cells. These results highlighted the cytotoxic and pro-apoptotic potential of the combined activity of polyphenolic compounds from ABJ, demonstrating distinct mechanisms in vitro.