Skin aging from the perspective of dermal fibroblasts: the interplay between the adaptation to the extracellular matrix microenvironment and cell autonomous processes.
Level 5 - mechanism / opinion, no new human data
Narrative review of mechanistic biological pathways without new human data
PubMed 37067763 · doi:10.1007/s12079-023-00743-0
What was done
This narrative review synthesized literature on the molecular and cellular mechanisms of human skin aging, focusing on the dynamic interactions between dermal fibroblasts and the collagen-rich extracellular matrix (ECM).
What was found
The abstract reports no quantitative findings or numerical data. It outlines a mechanistic feed-forward model of skin aging: matrix metalloproteinase (MMP)-driven ECM degradation disrupts mechanical tension on dermal fibroblasts, causing them to collapse morphologically. This altered mechanical signaling induces CCN1 expression and activates AP-1, leading to upregulated MMPs and pro-inflammatory factors, alongside downregulation of the type II TGF-beta receptor, which diminishes ECM synthesis and accelerates structural breakdown.
Why it matters
It provides a framework for understanding skin aging not just as intrinsic cellular senescence, but as an interactive feed-forward loop between degraded physical ECM microenvironments and altered fibroblast gene expression.
Limits
The abstract describes a narrative review with no systematic search protocol, meta-analytic pooling, or original experimental data. No clinical outcomes, sample sizes, or quantitative effect sizes are provided.
Cited by
- supports Matrix metalloproteinases (MMPs) degrade collagen and increase significantly with aging.