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Surgical wound healing using hemostatic gauze scaffold loaded with nanoparticles containing sustained-release granulocyte colony-stimulating factor

Authors Yuan W, Liu Z

Published 2 December 2011 Volume 2011:6 Pages 3139—3149

DOI https://doi.org/10.2147/IJN.S26006

Review by Single-blind

Peer reviewer comments 3

Weien Yuan1,2, Zhenguo Liu1
1Department of Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 2School of Pharmacy, Shanghai Jiao Tong University, Shanghai, People's Republic of China

Background: The therapeutic strategies for malignant melanoma are still cancer chemotherapy, radiotherapy, and tumor resection. However, these therapeutic strategies often lead to a reduced neutrophilic granulocyte count or loss of more blood after surgical tumor resection. In this study, we developed a formulation of hemostatic gauze impregnated with sustained-release granulocyte colony-stimulating factor (G-CSF) with increasing of the neutrophilic granulocyte count in the blood following chemotherapy and decreasing blood loss after surgical tumor resection.
Methods: We designed a formulation with both hemostatic properties and increased neutrophil content to be used in cancer chemotherapy, radiotherapy, and tumor resection, comprising a hemostatic gauze as a scaffold and (G-CSF)-loaded dextran nanoparticles coated with polylactic-co-glycolic acid (PLGA) solution fabricated by direct spray-painting onto the scaffold and then vacuum-dried at room temperature. The performance of this system was evaluated in vitro and in vivo.
Results: Nearly zero-order release of G-CSF was recorded for 12–14 days, and the cumulative release of G-CSF retained over 90% of its bioactivity in a NFS-60 cell line proliferation assay when the scaffold was incubated in phosphate-buffered saline (pH 7.4) at 37°C. The in vivo hemostatic efficacy of this formulation was greater than that of native G-CSF, the scaffold directly spray-painted with G-CSF solution or PLGA organic solution as a coating, or when a blank scaffold was covered with the coating.
Conclusion: Our results suggest that this formulation has both hemostatic properties and increased neutrophil activity.

Keywords: hemostatic gauze scaffold, granulocyte colony-stimulating factor, bioactivity, sustained-release, stability

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