Extracellular matrix regulation of fibroblast function: redefining our perspective on skin aging.
Level 5 - mechanism / opinion, no new human data
Narrative review describing mechanistic models without new clinical or trial data
PubMed 29455303 · doi:10.1007/s12079-018-0459-1
What was done
Narrative review summarizing published literature on age-related structural alterations in the dermal extracellular matrix (ECM) and how these changes alter mechanical and biochemical signaling between fibroblasts and their microenvironment in human skin.
What was found
The abstract reports a mechanistic framework without quantitative data. Fibroblasts in young skin adhere to intact type I collagen fibrils, exert mechanical force, and maintain ECM homeostasis. With aging, collagen fibril fragmentation disrupts fibroblast spreading and mechanical tension, prompting a shift toward reduced ECM protein synthesis and increased production of matrix-degrading metalloproteinases. No statistical values, sample sizes, or numeric effect sizes are reported in the abstract.
Why it matters
Highlights the bidirectional mechanical interplay between the dermal microenvironment and fibroblast phenotype, framing collagen fragmentation as a self-perpetuating driver of skin aging.
Limits
As a narrative review, it lacks primary empirical data, systematic search methodology, and quantitative effect estimates. It relies on qualitative mechanistic synthesis rather than controlled clinical evidence.
Cited by
- supports Matrix metalloproteinases (MMPs) degrade collagen and increase significantly with aging.