Histological Survey of the Effect of Granulocyte-colony-stimulating Factor(G-CSF) on Bacterial Translocation and Wound Healing in Burned Mice

Authors

1 Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran

2 Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases; Eye Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran

3 Department of Veterinary Medicine, Azad University, Abhar Branch, Abhar, Iran

4 Immunology Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences; Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran

5 Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran

Abstract

Background: Burn wound is an important cause of morbidity and mortality worldwide. Improving the host's immune system and removing the infection can be effective in healing wounds caused by burns. Granulocyte-colony-stimulating factor (G-CSF) stimulates both the bone marrow to produce granulocytes and the function of neutrophil precursors. The aim of this study was to examine the effect of G-CSF on removing infection and healing wound. Materials and Methods: A burn model was used to induce burns in 18 adult Balb/c mice, and their wounds were infected by Acinetobacter baumannii strains. Burned mice were divided into two groups (control and G-CSF) and treated daily by subcutaneous injections of normal saline (0.1 mL) and G-CSF (10 μg/kg). The wound healing process was evaluated by the morphological and histological assessments. Results: In morphological assay, the mean size of the wounds in the 3rd and 7th days of the treatment was significantly lower in the G-CSF treated group compared to the control group. Some of the histological parameters were evaluated, including the level of inflammation, re-epithelialization, angiogenesis, collagen deposition, the amount of granulation tissue, and fibroblast maturation. The results showed that inflammation was reduced in the G-CSF-treated group, and re-epithelialization and collagen deposition were increased insignificantly compared to the normal saline-treated group. Furthermore, bacterial translocation was reduced significantly in the G-CSF-treated group. Conclusion: G-CSF enhances wound closure and helps in wound healing by improving the immune system. It has also an anti-inflammatory role and reduces bacterial translocation.

Keywords

References

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History

  • Receive Date: 10 November 2020
  • Accept Date: 10 November 2020

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