Hypertrophic Scar Formation and Wound Healing Mechanisms
Summary
Wound healing is a finely orchestrated process comprising haemostasis, inflammation, proliferation and remodelling. Under normal conditions, these phases restore tissue integrity with minimal residual scarring. In contrast, hypertrophic scars arise when remodelling becomes aberrant, leading to excessive deposition of extracellular matrix and persistent myofibroblast activity. Central to this dysregulation is the transforming growth factor-β (TGF-β) pathway, which governs fibroblast proliferation, collagen synthesis and immune cell recruitment. Mechanical forces within the wound environment further modulate cellular behaviour via mechanotransduction, amplifying fibrotic responses. The resulting raised, erythematous scars can impair function, restrict mobility and carry a significant psychosocial burden. Innovations in biomaterials, controlled drug delivery and cell reprogramming aim to rebalance the healing cascade, favour regeneration over fibrosis and restore both form and function to injured skin.
Research from Nature Portfolio
A recent study has developed an integrated photo-crosslinking hydrogel dressing embedded with microcapsules for pulsatile release of a TGF-β inhibitor. By achieving spatiotemporal control of inhibitor delivery, this platform enhances re-epithelialisation while selectively suppressing fibrotic signalling. In murine and large-animal models, treated wounds closed more rapidly and exhibited markedly reduced scar thickness and collagen misalignment. This approach highlights the importance of timing and localised modulation of profibrotic cytokines to achieve scarless repair.
Hypertrophic Scar Formation and Wound Healing Mechanisms publication trend
The graph below shows the total number of articles in hypertrophic scar formation and wound healing mechanisms across all publications each year (not limited to Nature Index journals).
Technical terms
Extracellular matrix (ECM): A network of proteins and glycosaminoglycans that provides structural support and biochemical signals to cells.
Myofibroblast: A contractile cell phenotype responsible for wound contraction and extracellular matrix deposition during healing.
Transforming growth factor-β (TGF-β): A cytokine that regulates cell proliferation, differentiation and extracellular matrix production, central to fibrotic responses.
Mechanotransduction: The process by which cells convert mechanical stimuli into biochemical signals, influencing gene expression and behaviour.
Hydrogel: A water-swollen, crosslinked polymer network used as a scaffold for drug delivery or tissue engineering.
Dermal papilla cell (DPC): A specialised fibroblast at the base of hair follicles that directs follicle formation and hair growth.
References
- A pulsatile release platform based on photo-induced imine-crosslinking hydrogel promotes scarless wound healing. Nature Communications (2021).
- Biomaterial-based mechanical regulation facilitates scarless wound healing with functional skin appendage regeneration. Military Medical Research (2024).
- Cocktail Cell‐Reprogrammed Hydrogel Microspheres Achieving Scarless Hair Follicle Regeneration. Advanced Science (2024).
- Nano drug delivery systems: a promising approach to scar prevention and treatment. Journal of Nanobiotechnology (2023).
About these summaries
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