Researchers used a combined computational and laboratory approach to identify six novel ACE-inhibitory peptides from yellow croaker fish protein, with IC50 values as low as 0.63 μM — comparable to pharmaceutical ACE inhibitors.
IC50 of 0.63 μMThe most potent fish-derived peptide showed ACE inhibition comparable to pharmaceutical-grade inhibitors
What the researchers found
Six novel ACE-inhibitory peptides were identified from yellow croaker protein with IC50 values ranging from 0.63 to 10.26 μM. Three peptides (IPYADFK, FYEPFM, NWPWMK) maintained activity after simulated gastrointestinal digestion.
Why it matters
Finding potent natural ACE inhibitors from food sources could lead to functional foods or nutraceuticals that help manage blood pressure with fewer side effects than pharmaceutical drugs.
The numbers in context
Multiple ACE-inhibitory peptides were identified from Larimichthys crocea protein using the combined computational and experimental pipeline.
How the study worked
Combined in silico hydrolysis, QSAR modeling, LC-MS/MS identification, inhibition kinetics, and molecular docking to screen, identify, and validate ACE-inhibitory peptides from Larimichthys crocea protein.
Who was studied
In vitro and in silico analysis of yellow croaker (Larimichthys crocea) protein
What this study cannot tell us
In vitro and in silico study only — no animal or human testing. Gastrointestinal simulation may not fully replicate real digestion. Bioavailability after absorption is unknown. Practical application as food product not yet developed.
How to read the evidence
Preliminary evidence — in vitro and computational study identifying candidate peptides. No animal or human validation yet.
When this study was published
Published in 2024, using current computational biology methods for peptide discovery.
The bigger picture
Food-derived bioactive peptides are an expanding field bridging nutrition and pharmacology. As computational tools improve, the discovery pipeline for natural ACE inhibitors is accelerating, potentially yielding functional foods that complement blood pressure management.
Questions still open
- Can these peptides survive absorption and reach the bloodstream in active form?
- Would consuming yellow croaker fish protein hydrolysate produce measurable blood pressure reduction in humans?
- How do these peptides compare in potency and bioavailability to peptides from other food sources like milk or soy?
Common questions
Could eating yellow croaker fish lower blood pressure?
How do these fish peptides compare to blood pressure medications?
Read the original research
Biodirected Screening and Preparation of Larimichthys crocea Angiotensin-I-Converting Enzyme-Inhibitory Peptides by a Combined In Vitro and In Silico Approach.
Molecules (Basel, Switzerland), 29(5)
Citation
Yang, Zhizhi; Wang, Changrong; Huang, Baote; Chen, Yihui; Liu, Zhiyu; Chen, Hongbin; Chen, Jicheng. (2024). Biodirected Screening and Preparation of Larimichthys crocea Angiotensin-I-Converting Enzyme-Inhibitory Peptides by a Combined In Vitro and In Silico Approach.. Molecules (Basel, Switzerland), 29(5). https://doi.org/10.3390/molecules29051134