Short-chain peptides derived from perch processing waste accelerated wound healing in both cell culture and rat models by boosting production of collagen, fibronectin, and hyaluronan.
62.6% low molecular weight peptidesThe majority of perch hydrolysate peptides were under 1 kDa — small enough for potential bioavailability — and they accelerated wound healing when given orally to rats.
What the researchers found
Perch hydrolysates contained 62.60% peptides with low molecular weight (≤1 kDa), with collagen composition at 1,183 mg/100g and branched-chain amino acids at 1,122 mg/100g. The peptide sequence FPSLVRGP, at 6.21% abundance, was identified as potentially antihypertensive.
In fibroblast models, the peptides accelerated wound healing by increasing secretion of procollagen I, fibronectin, and hyaluronan. In SD rats with wounds mimicking human injuries, orally administered perch hydrolysates (MW <2.3 kDa) accelerated wound healing through the combined action of collagen-forming amino acids, branched-chain amino acids, and matrikines (extracellular matrix-derived signaling peptides).
Why it matters
Wound healing remains a significant medical challenge, especially for chronic wounds in aging or diabetic populations. This study demonstrates that fish processing waste — typically discarded — can yield bioactive peptides with wound-healing properties. If developed as dietary supplements, these could provide an accessible, sustainable approach to supporting wound repair while simultaneously addressing food waste in the fishing industry.
How the study worked
Perch side streams (processing waste) were hydrolyzed using a commercial enzyme complex with proprietary pressure extraction. Peptide molecular weight distribution and amino acid composition were characterized. Wound healing effects were tested in two models: human fibroblast cell cultures (measuring procollagen I, fibronectin, and hyaluronan secretion) and an SD rat wound model with oral administration of the hydrolysates.
What this study cannot tell us
The rat wound model, while useful, may not fully predict human wound-healing responses. The study used oral administration, and the bioavailability and mechanism of action of the peptides after oral intake are not fully characterized. The specific peptide FPSLVRGP's antihypertensive effect was suggested based on sequence similarity rather than direct testing. Exact dosing and duration in the rat model are not specified in the abstract.
How to read the evidence
This study includes both in vitro (fibroblast) and in vivo (rat) evidence, providing stronger support than cell culture alone. However, it remains preclinical with no human clinical data, and the specific mechanisms of oral bioavailability are not established.
When this study was published
Published in 2025, this is very recent research in the active field of food-derived bioactive peptides for health applications.
The bigger picture
This study connects two important trends: the search for bioactive peptides with therapeutic applications and the push toward sustainable upcycling of food industry waste. Fish-derived collagen peptides are already a growing market in the supplement industry, and this research adds wound-healing evidence to their potential benefits while demonstrating that waste streams can be a viable source material.
Questions still open
- Would these perch-derived peptides be effective for chronic or diabetic wounds where healing is significantly impaired?
- How do these peptides survive gastrointestinal digestion to exert wound-healing effects when taken orally?
- Could topical application of these peptides be more effective than oral administration for wound healing?
Common questions
Can fish peptides help wounds heal faster?
What makes fish processing waste valuable for health products?
Read the original research
Perch Hydrolysates from Upcycling of Perch Side Streams Accelerate Wound Healing by Enhancing Fibroblasts to Secrete Procollagen I, Fibronectin, and Hyaluronan.
Current issues in molecular biology, 47(1)
Citation
Chang, Jia-Feng; Hsieh, Chih-Yu; Chen, Ling-Ni; Lee, Mao-Hsiang; Ting, Yi-Han; Yang, Chi-Yu; Lin, Chih-Cheng. (2025). Perch Hydrolysates from Upcycling of Perch Side Streams Accelerate Wound Healing by Enhancing Fibroblasts to Secrete Procollagen I, Fibronectin, and Hyaluronan.. Current issues in molecular biology, 47(1). https://doi.org/10.3390/cimb47010057