The role of lipid-based signalling in wound healing and senescence.
Level 5 - mechanism / opinion, no new human data
Narrative review of mechanistic and preclinical literature without systematic search
PubMed 34174292 · doi:10.1016/j.mad.2021.111527
What was done
The authors reviewed published literature on the roles of lipid-based signalling molecules, including eicosanoids, phospholipids, and extracellular vesicles, in tissue regeneration, wound healing, and cellular senescence, particularly during aging.
What was found
The abstract provides no quantitative data. It conceptually reports that bioactive lipids modulate immune cell attraction and inflammatory response initiation and resolution. In aging, lipid synthesis becomes dysregulated alongside senescent cell accumulation. Although eliminating senescent cells alleviates multiple age-associated diseases, their transient presence during acute wound healing supports repair and limits fibrosis; consequently, clearing senescent cells during wound healing delays in vivo wound closure.
Why it matters
This review highlights the dual role of cellular senescence and bioactive lipids in tissue repair, showing that transient senescent cells aid acute healing despite their harmful accumulation in chronic aging.
Limits
This is a narrative review with no defined systematic search strategy, meta-analysis, or sample size reporting. Findings rely on preclinical and mechanistic models without direct clinical human trial data.
Cited by
- supports Senescent cells secrete bioactive lipids, specifically prostaglandins and leukotrienes, which modulate inflammation, fibrosis, and tissue repair.