Three small peptides (GPR, GPRG, GPRGP) from silver carp skin collagen survived digestion, inhibited platelet aggregation, and prevented clot formation without causing bleeding in mice.
No bleeding riskCollagen hydrolysate with anti-platelet peptides showed no bleeding side effects in mice despite anti-clotting activity
What the researchers found
Peptides GPR, GPRG, and GPRGP from fish collagen resisted GI digestion, were absorbed by Caco-2 cells, and inhibited platelet aggregation (IC50: 0.160-0.917 mg/ml) without bleeding risk.
Why it matters
Blood clots cause heart attacks and strokes. A dietary supplement from fish skin collagen that prevents clotting without bleeding risk could be a safe preventive option for at-risk populations.
The numbers in context
GPR/GPRG/GPRGP; ADP IC50 0.160-0.283 mg/mL; thrombin IC50 0.714-1.008 mg/mL; survived GI digestion; Caco-2 absorbed; no mouse bleeding
How the study worked
Simulated gastrointestinal digestion stability; Caco-2 intestinal absorption model; ADP- and thrombin-induced platelet aggregation assays; platelet thrombus formation time; coagulation cascade analysis; mouse bleeding safety test.
Who was studied
Simulated digestion, Caco-2 cells, mouse bleeding model
What this study cannot tell us
In vitro bioavailability model (not in vivo absorption); IC50 values relatively high for oral dosing; mouse bleeding test not a comprehensive safety study; no human data.
How to read the evidence
Preliminary — in vitro bioavailability and activity data with mouse safety check, but no human clinical evidence.
When this study was published
Published in 2020; fish-derived bioactive peptides remain an active nutraceutical research area.
The bigger picture
Bioactive peptides from food waste (fish skin) represent a sustainable source of functional health ingredients. Anti-thrombotic peptides from collagen could complement conventional blood thinners with a better safety profile.
Questions still open
- What oral dose of collagen hydrolysate would achieve anti-platelet concentrations in human blood?
- Would these peptides interact with prescribed blood thinners like aspirin or warfarin?
- Can the peptides be concentrated to achieve therapeutic levels in a practical supplement dose?
Common questions
How do fish skin peptides prevent blood clots?
Can I take these instead of blood thinners?
Read the original research
The in vitro bioavailability of anti-platelet peptides in collagen hydrolysate from silver carp (Hypophthalmichthys molitrix) skin.
Journal of food biochemistry, 44(6), e13226
Citation
Li, Yuqi; Wang, Bo; Li, Bo. (2020). The in vitro bioavailability of anti-platelet peptides in collagen hydrolysate from silver carp (Hypophthalmichthys molitrix) skin.. Journal of food biochemistry, 44(6), e13226. https://doi.org/10.1111/jfbc.13226