Wound Healing Mechanisms and Vitality Estimation

The process of wound healing unfolds through overlapping phases of haemostasis, inflammation, proliferation and remodelling. Immediately after tissue disruption, clot formation arrests bleeding and provides a provisional matrix. Neutrophils and later macrophages infiltrate the lesion, removing debris and orchestrating the transition toward repair. Fibroblasts and endothelial cells then drive granulation tissue formation and angiogenesis, laying down new extracellular matrix. In the final remodelling phase, collagen undergoes alignment and cross-linking, restoring tensile strength. In parallel, forensic and clinical investigators have sought reliable vitality markers to distinguish ante-mortem from post-mortem wounds and to estimate the post-traumatic interval. Histological assessment, immunohistochemical detection of cell-surface antigens and molecular analyses of cytokines, transcription factors and non-coding RNAs all contribute to vitality estimation. Integrating these approaches offers global benefits in chronic wound care, diabetic ulcer management and forensic casework, where accurate timing and vitality determination inform both therapeutic decisions and legal outcomes.

Research from Nature Portfolio

Recent studies have delineated the temporal dynamics of macrophage phenotypes in skin repair and their forensic application. Gene expression profiling of key M1 markers (for example IL-6, TNF) and M2 markers (for example CD206, TGF-β1) in mouse wounds revealed distinct peaks at day 1–3 and day 6 respectively, a pattern recapitulated in human samples. Quantification of M1/M2 ratios via immunofluorescence suggested that a ratio above 3.0 correlates with wounds aged 1–5 days, offering a practical marker for post-traumatic timing. In a complementary line of inquiry, microRNA expression in skin ligature marks was shown to differ markedly from normal skin controls. Elevated levels of inflammation-associated miR-125a-5p and anti-inflammatory miR-214-3p, along with upregulation of miR-222-3p and miR-150-5p linked to mast-cell and neutrophil activation, yielded a diagnostic panel capable of confirming lesion vitality with high specificity.

Wound Healing Mechanisms and Vitality Estimation publication trend

The graph below shows the total number of articles in wound healing mechanisms and vitality estimation across all publications each year (not limited to Nature Index journals).

Technical terms

Haemostasis: The process of blood-clot formation that immediately follows vascular injury.

Macrophage polarity: The functional differentiation of macrophages into pro-inflammatory (M1) or anti-inflammatory (M2) states.

miRNA: Small non-coding RNA molecules (18–25 nucleotides) that regulate gene expression at the post-transcriptional level.

Immunohistochemistry: A laboratory method using antigen–antibody reactions to visualise specific proteins in tissue sections.

Post-traumatic interval (PTI): The elapsed time between tissue injury and its examination or sampling.

References

1. Macrophage polarity and wound age determination. Scientific Reports (2022).
2. Regulation of miRNAs as new tool for cutaneous vitality lesions demonstration in ligature marks in deaths by hanging. Scientific Reports (2019).
3. FOXO3 Depletion as a Marker of Compression-Induced Apoptosis in the Ligature Mark: An Immunohistochemical Study. International Journal of Molecular Sciences (2023).
4. Dating Skin Lesions of Forensic Interest by Immunohistochemistry and Immunofluorescence Techniques: A Scoping Literature Review. Diagnostics (2024).
5. Complex challenges of estimating the age and vitality of muscle wounds: a study with matrix metalloproteinases and their inhibitors on animal and human tissue samples. International Journal of Legal Medicine (2021).