Abstract
Background: Cytokines play a major role in coordinated wound healing events. We hypothesized that rapid intestinal healing is due to an early upregulation of the pro-inflammatory cytokine interleukin-1β (IL-1β), followed by increases in the expression of the anti-inflammatory cytokine IL-10.
Methods: We characterized the time course of IL-1β and IL-10 release at four wounds (skin, muscle, small bowel, and colonic anastomosis) after surgery on 38 juvenile male Sprague-Dawley rats. The tissue samples of each site were harvested at 0 (control), 1, 3, 5, 7, and 14 days postoperatively (n=6–8 per group) and analyzed by enzyme-linked immunosorbent assay kits for IL-1β and IL-10.
Results: IL-1β expression peaked at days 5 and 7 in small bowel and colonic wounds when compared to skin or muscle. Similarly, IL-10 showed high expression in these time points in small bowel and colonic wounds. However, IL-10 showed the same expression in all time points in muscle and skin tissues except at day 1.
Conclusions: The high expression in IL-1β and IL-10 levels in small bowel and colon might explain the accelerated healing process in these wounds in comparison to skin and muscle tissues. Additional studies are required to determine whether IL-1β and IL-10 expression is the major factor defining site-specific differences in healing rates in different tissues. Understanding cytokine action in the wound healing process could lead to novel and effective therapeutic strategies.
Acknowledgments
This work was supported by King Abdulaziz City for Science and Technology (KACST) Grant number: “gs1”ARP-28-82. We would like to thank Mr. Sabirin S. for his help in running the samples.
Conflict of interest statement
Authors’ conflict of interest disclosure: The authors stated that there are no conflicts of interest regarding the publication of this article.
Research funding: None declared.
Employment or leadership: None declared.
Honorarium: None declared.
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