Berry-derived gut compound found to directly grab a cell survival switch
Faienza F, Roversi D, Carneri F, Romeo A, Tani A
Medicinal Plants
The anthocyanins that give blueberries, red cabbage, and purple grapes their color get converted by gut bacteria into protocatechuic acid, and this study shows that everyday metabolite can physically latch onto a human protein and shift how cells respond to stress.
When you eat blueberries, red cabbage, or other deeply colored plants, your gut bacteria break down their pigments into a smaller molecule called protocatechuic acid. Scientists found this molecule can grab onto a specific protein inside cells, called TRAF2, and flip it from sending stress signals toward sending survival signals. At the tiny amounts your body actually sees after a meal, this seems to help cells stay alive rather than cause harm.
Key Findings
Protocatechuic acid (PCA) directly binds the TRAF domain of TRAF2, lowering its thermal stability and likely disrupting its trimeric structure, confirmed via computational modeling, fluorescence spectroscopy, and calorimetry.
At low micromolar concentrations matching real dietary blood levels, PCA increased cell viability in HAP1 leukemia cells through a TRAF2-dependent pathway.
Mechanistically, PCA suppresses JNK stress signaling while redirecting TRAF2 toward pro-survival, c-Myc-driven proliferation routes.
chevron_right Technical Summary
A compound your gut makes when you digest berries and other colorful plant foods turns out to bind directly to a cell-signaling protein called TRAF2, nudging cells toward survival pathways instead of stress pathways. The discovery helps explain why this common plant chemical seems to boost cell viability at the low doses actually found in blood after eating.
Abstract Preview
Original paper
Protocatechuic acid promotes c-Myc-mediated cell proliferation by directly targeting TRAF2.
Protocatechuic acid (PCA) is both a prominent gut microbiota-derived metabolite of anthocyanins and a naturally occurring phenolic acid presents in various edible plants. Although this compound has...
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