Fermented Milk Yields Three Blood-Pressure-Lowering Peptides with Proven ACE-Blocking Power
Three short peptides (WRP, WSR, YRP) isolated from milk fermented with Lactobacillus delbrueckii effectively inhibit the blood-pressure-raising enzyme ACE in lab tests.
Quick Facts
What This Study Found
Three ACE-inhibiting tripeptides (WRP IC50 46.7 μM, YRP IC50 89.6 μM, WSR IC50 300.1 μM) were identified from fermented milk, with molecular dynamics confirming stable enzyme binding for WRP.
Key Numbers
WRP: IC50 46.707 μM. WSR: IC50 300.121 μM. YRP: IC50 89.555 μM. 16 stable tripeptides initially screened from fermented milk proteome.
How They Did This
Proteomics identified peptides in fermented milk before and after ultra-high pressure treatment. Sixteen stable tripeptides were screened via activity prediction, PeptideCutter analysis, and hydrophobicity. ACE inhibition was tested in vitro; molecular dynamics simulation confirmed binding stability.
Why This Research Matters
Rather than just observing that fermented dairy lowers blood pressure, this study pinpoints the specific peptides responsible and maps exactly how they interact with ACE, opening the door to targeted functional food development.
The Bigger Picture
ACE inhibitor drugs (like lisinopril) are a cornerstone of blood pressure management but come with side effects. Food-derived peptides that naturally inhibit the same enzyme could complement or partially replace pharmaceuticals for mild hypertension, especially through everyday dietary choices like fermented dairy.
What This Study Doesn't Tell Us
This is an in vitro and computational study — it does not prove these peptides lower blood pressure in living organisms. Real-world bioavailability after full human digestion remains unconfirmed, and the peptide concentrations achievable through normal dairy consumption are unknown.
Questions This Raises
- ?Can WRP and YRP survive full human digestion and reach the bloodstream at meaningful concentrations?
- ?What dose of fermented milk would be needed to deliver a clinically relevant amount of these ACE-inhibitory peptides?
- ?Do these peptides have any off-target effects beyond ACE inhibition?
Trust & Context
- Key Stat:
- IC50 46.7 μM WRP tripeptide's ACE inhibitory potency — the most active of three peptides found in fermented milk
- Evidence Grade:
- Preliminary evidence from in vitro enzyme assays and computational modeling. No animal or human trials have been conducted with these specific peptides.
- Study Age:
- Published in 2024; represents current food-derived peptide research.
- Original Title:
- Screening and molecular dynamics simulation of ACE inhibitory tripeptides derived from milk fermented with Lactobacillus delbrueckii QS306.
- Published In:
- Food & function, 15(5), 2655-2667 (2024)
- Authors:
- Wu, Nan(3), Li, Puyu(2), Shuang, Quan(2), Wuhanqimuge
- Database ID:
- RPEP-09547
Evidence Hierarchy
Frequently Asked Questions
Can drinking fermented milk actually lower blood pressure?
Some clinical studies have shown modest blood pressure reductions from fermented dairy, and this study identifies specific peptides that may be responsible. However, the amount of active peptide you get from a serving of yogurt or kefir hasn't been quantified in this research.
How do these peptides compare to ACE inhibitor medications?
ACE inhibitor drugs are far more potent and have decades of clinical evidence. These food-derived peptides are much weaker and would likely only be relevant as a complementary dietary strategy, not a pharmaceutical replacement.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-09547APA
Wu, Nan; Li, Puyu; Shuang, Quan; Wuhanqimuge. (2024). Screening and molecular dynamics simulation of ACE inhibitory tripeptides derived from milk fermented with Lactobacillus delbrueckii QS306.. Food & function, 15(5), 2655-2667. https://doi.org/10.1039/d3fo03320a
MLA
Wu, Nan, et al. "Screening and molecular dynamics simulation of ACE inhibitory tripeptides derived from milk fermented with Lactobacillus delbrueckii QS306.." Food & function, 2024. https://doi.org/10.1039/d3fo03320a
RethinkPeptides
RethinkPeptides Research Database. "Screening and molecular dynamics simulation of ACE inhibitor..." RPEP-09547. Retrieved from https://rethinkpeptides.com/research/wu-2024-screening-and-molecular-dynamics
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.