Piezo1 Mechano-Activation Is Augmented by Resveratrol and Differs between Colorectal Cancer Cells of Primary and Metastatic Origin.
Level 5 - mechanism / opinion, no new human data
In vitro bench study using cell lines and computational modeling with no human subjects
PubMed 36080197 · doi:10.3390/molecules27175430
What was done
The authors evaluated the effects of fluid shear stress (FSS) on cell survival, membrane integrity, proliferation, and mechanosensitive ion channel activation in colorectal cancer. They compared two cell lines derived from the same patient: SW480 (primary tumor) and SW620 (lymph node metastasis). Cells were exposed to high-magnitude shear pulses (modeling turbulent flow) or sustained shear (modeling average circulatory flow). Mechanosensitive responses were evaluated using the Piezo1 agonist Yoda1 with or without resveratrol pretreatment, along with TRAIL-mediated apoptosis assays and computational modeling.
What was found
The abstract reports directional findings without numerical values. SW480 primary cells were significantly more sensitive to FSS-induced death than metastatic SW620 cells. Shear pulses caused significant cell membrane damage, while constant shear decreased proliferation and increased CD133 expression. Yoda1 stimulated intracellular calcium influx, which was further enhanced by resveratrol pretreatment via Piezo1 lipid-raft colocalization. Apoptosis changes were minimal due to predicted calcium saturation. Compared to SW620 cells, SW480 cells exhibited higher Piezo1 expression, greater calcium influx, and increased TRAIL-mediated apoptosis.
Why it matters
This study highlights how differential Piezo1 mechanosensitivity and shear stress survival may distinguish metastatic from primary cancer cells, pointing to mechanotransduction pathways as potential modulators of circulating tumor cell dissemination.
Limits
The study is entirely in vitro and computational, using a single matched pair of cell lines from one patient. The abstract reports no quantitative values, effect sizes, or p-values. In vivo applicability and physiological relevance of resveratrol concentrations were not assessed.
Cited by
- supports Circulating tumor cells have mechanosensors on their surface and can undergo apoptosis in response to the mechanical shear stress and friction of blood flow during exercise.