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Correlation between interleukin-6 and matrix metalloproteinase-9 in early wound healing in children
O T Pajulo1, K J Pulkki, M S Alanen
1Departments of Pediatric Surgery, Turku University Central Hospital, Turku, Finland. olli.pajulo@utu.fi
Insights
Early wound healing involves increased interleukin-6 and matrix metalloproteinase-9, closely linked to neutrophil activity. These inflammatory markers significantly correlate with neutrophil numbers in wound fluid.
Area of Science:
- Biomedical Science
- Wound Healing Research
- Inflammation Studies
Background:
- Early wound healing is a complex process involving inflammatory responses and cellular changes.
- Understanding the molecular and cellular dynamics in the initial stages of wound healing is crucial for optimizing patient recovery.
Purpose of the Study:
- To determine interleukin-6 (IL-6) and matrix metalloproteinase-9 (MMP-9) concentrations in wound fluid during early healing.
- To investigate the association between these inflammatory markers and cellular changes in surgical wounds.
- To explore the relationship between extracellular matrix degradation and the inflammatory response in pediatric wound healing.
Main Methods:
- A prospective study involving 75 children undergoing elective surgery.
- Utilized the Cellstick(R) device to collect wound fluid at 3 and 24 hours post-wounding.
- Analyzed differential cell counts and concentrations of IL-6 and MMP-9 in wound fluid.
Main Results:
- Interleukin-6 and matrix metalloproteinase-9 concentrations increased in parallel (r = 0.81).
- Neutrophil proportion in wound fluid significantly increased (p < 0.0001), while lymphocyte proportion decreased (p < 0.0001) over time.
- Neutrophil count strongly correlated with IL-6 (adjusted R2 = 0.41) and MMP-9 (adjusted R2 = 0.37) concentrations.
Conclusions:
- The extracellular matrix degradation process in early wound healing is closely linked to the inflammatory response.
- Both IL-6 and MMP-9 are significant markers associated with neutrophil activity in the wound.
- Findings highlight the critical role of neutrophils and inflammatory mediators in the initial phase of wound repair.
Abstract:
Interleukin-6 and matrix metalloproteinase-9 concentrations in the wound fluid and their associations to cellular changes were determined in early wound healing. Wound healing of 75 children who underwent elective operations was studied with the Cellstick(R) device, which was inserted into the wound at the end of the operation and removed 3 or 24 hours post-wounding. Differential counts of the wound cells and interleukin-6 and matrix metalloproteinase-9 concentrations in the wound fluid were analyzed. Interleukin-6 and the matrix metalloproteinase-9 concentrations increased in parallel (r = 0.81). The proportion of wound neutrophils increased (p < 0.0001) and lymphocytes decreased (p < 0. 0001) between the observation times. The number of wound neutrophils had a strong correlation with both interleukin-6 (adjusted R2 = 0.41, p < 0.0001) and matrix metalloproteinase-9 concentrations (adjusted R2 = 0.37, p < 0.0001). The extracellular matrix degradation process of the early wound healing seems to be closely linked to the inflammatory response. Both of these measured markers are associated significantly with the neutrophil proportion in the wound.