Collagen peptides modulate the metabolism of extracellular matrix by human dermal fibroblasts derived from sun-protected and sun-exposed body sites.
Level 5 - mechanism / opinion, no new human data
In vitro bench study on human cell lines and tissue models without human in vivo trial data
PubMed 28906033 · doi:10.1002/cbin.10872
What was done
Researchers treated cultured human dermal fibroblasts (HDFs) derived from chronologically aged (sun-protected) and photoaged (sun-exposed) skin sites with collagen hydrolysate (CH). They evaluated cell proliferation and extracellular matrix metabolism using both monolayer cell cultures and a 3D human dermal equivalent model.
What was found
No quantitative numbers or effect sizes were reported in the abstract. CH treatment did not alter cellular proliferation in either cell culture model. In both monolayer and dermal equivalent models, CH increased procollagen I and collagen I levels via stimulated biosynthesis and reduced degradation through inhibition of matrix metalloproteinases 1 and 2 (MMP-1 and MMP-2). Modulation occurred in cells from both body sites, though lower concentrations appeared sufficient to stimulate fibroblasts from sun-exposed areas.
Why it matters
This study outlines a biological mechanism—enhanced collagen synthesis combined with MMP inhibition—that may help explain clinical findings associated with oral collagen supplementation.
Limits
The study is entirely in vitro; responses in cell culture do not capture gastrointestinal digestion, systemic bioavailability, or clinical efficacy in vivo. The abstract reports no donor numbers, peptide concentrations, or numerical statistical values.
Cited by
- supports In vitro studies on skin fibroblasts show that small collagen peptides reduce matrix metalloproteinase levels and upregulate enzymes responsible for collagen synthesis.