Inflammatory Responses and Healing in Burn Injuries

Severe burn injury triggers a dynamic interplay between tissue damage and the immune system, initiating a well-orchestrated healing process. Immediately after insult, damaged keratinocytes and stromal cells release damage-associated molecular patterns, which activate the innate immune response. Neutrophils and macrophages migrate to the wound, phagocytosing debris and secreting pro-inflammatory cytokines such as interleukin-6 and tumour necrosis factor-α. This early inflammatory phase clears pathogens and primes the proliferative phase, during which fibroblasts synthesise extracellular matrix components and endothelial cells form new vasculature. Re-epithelialisation is driven by keratinocyte migration and proliferation, ultimately restoring barrier function. A balanced transition to the remodelling phase is essential; excessive or prolonged inflammation may lead to hypertrophic scarring and systemic complications such as sepsis or multiple organ dysfunction. Recent advances reveal the importance of reactive oxygen species not only as mediators of microbial killing but also as signals for tissue regeneration. Parallel progress in diagnostic biomarkers now enables more precise assessment of burn-induced pathology and prognosis. The global burden of burn injuries, particularly in low-resource settings, underscores the need for cost-effective therapies that modulate inflammation while promoting regeneration. Emerging strategies include targeted modulation of cytokine networks, cell-based skin equivalents and multifunctional dressings that combine antimicrobial, anti-inflammatory and regenerative properties.

Research from Nature Portfolio

Recent experimental studies in murine models have elucidated the dual role of early inflammation in wound resolution. One investigation demonstrated that timed application of silver nanoparticle dressings modulates pro-inflammatory interleukin-6 production by keratinocytes and neutrophils through KGF-2/p38 signalling. Immediate suppression of inflammation hindered re-epithelialisation, whereas a brief delay in treatment preserved beneficial early inflammatory cues and led to optimal dermal repair. These findings highlight the necessity of preserving an initial inflammatory window to support subsequent proliferative and remodelling phases, and they offer a framework for clinical translation of biomaterial-based therapies that fine-tune the inflammatory timeline.

Inflammatory Responses and Healing in Burn Injuries publication trend

The graph below shows the total number of articles in inflammatory responses and healing in burn injuries across all publications each year (not limited to Nature Index journals).

Technical terms

Cytokine: Small secreted protein that mediates communication between immune and tissue cells during inflammation and repair.

Neutrophil: Innate immune cell that is among the first responders to injury, capable of phagocytosis and degranulation.

Macrophage: Monocyte-derived cell that clears debris, presents antigens and regulates the transition from inflammation to tissue regeneration.

Reactive oxygen species (ROS): Chemically reactive oxygen-containing molecules that participate in antimicrobial defence and signal transduction in healing.

Biomarker: Measurable molecule in tissues or fluids that indicates a physiological or pathological state, used for diagnosis or prognosis.

Hydrogel: Hydrophilic polymer network that maintains wound moisture, can deliver therapeutics, and protect against infection.

Re-epithelialisation: Process by which keratinocytes migrate and proliferate to restore the epidermal barrier over a wound.

References

1. Delayed application of silver nanoparticles reveals the role of early inflammation in burn wound healing. Scientific Reports (2020).
2. Decoding burn trauma: biomarkers for early diagnosis of burn-induced pathologies. Biomarker Research (2024).
3. Monocytes and T cells incorporated in full skin equivalents to study innate or adaptive immune reactions after burn injury. Frontiers in Immunology (2023).
4. A Paintable Small-Molecule Hydrogel with Antimicrobial and ROS Scavenging Activities for Burn Wound Healing. Gels (2024).