Abstract
Diabetic wound management is a serious health care challenge due to higher rates of relapse, expensive treatment approaches, and poor healing outcomes. Among cell-based therapies, use of platelet-rich plasma (PRP) has been shown to be effective for diabetic wounds, but its poor shelf-life limits its clinical use. Here, we demonstrate a simple but effective polymer system to increase the shelf-life of PRP by developing a polyelectrolyte complex with dropwise addition of chitosan solution containing PRP by simple mixing at room temperature. Thus, prepared chitosan-fucoidan (CF) carrier complex encapsulated more than 95% of the loaded PRP. The resulting CF/PRP colloids were spherical in shape and ensured extended PRP release up to 72 h at 37 °C. Routine characterization (FT-IR, XRD, SEM) showed the material properties. The biological assays showed that CF complexes were biocompatible while CF/PRP enhanced the proliferation of fibroblasts and keratinocytes via higher Ki67 expression and fibroblast migration. Further investigations using a diabetic mouse model demonstrated significantly higher wound contraction and histopathological observations showed increased fibroblast migration, and collagen and cytokeratin deposition in treatment groups. The results are suggestive of the efficacy of CF/PRP as a cost-effective topical formulation for the sustained delivery of growth factors in treating chronic diabetic wounds.
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Acknowledgements
The authors acknowledge Dr. Mohamed Hafeezulla Shariff, Pathology Department, Yenepoya Medical College, for help in the PRP preparation and hematological studies.
Funding
The authors received the funding support from DST- SERB, Govt. of India (EMR/2016/0033113). Sneha S. Rao received the ICMR-SRF fellowship (45/54/2020-Nan/BMS).
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Dr. Rekha Punchappady-Devasya: conceptualization, project administration, investigation, manuscript drafting reviewing and editing. Sneha Subramanya Rao: formal analysis, methodology, data curation, validation and manuscript drafting. Dr. Jayachandran Venkatesan: formal analysis, methodology, data curation, validation and manuscript reviewing and editing. Yuvarajan Subramaniyan: methodology (in vivo experiments).
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All the procedures in this study involving human participants were approved by the institutional ethics committee (YEC-1/2019/179), Yenepoya (Deemed to be University). Prior informed consent was obtained from the participants before the collection of blood sample. Similarly, all the procedures involving the animal experiments were approved by the institutional animal ethics committee (YU/IAEC/6/2019), Yenepoya (Deemed to be University).
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Highlights
• Chitosan-fucoidan polyelectrolyte complex (CF) synthesized showed excellent protein encapsulation efficiency with platelet-rich plasma (PRP).
• PRP-loaded chitosan-fucoidan polyelectrolyte complex (CF/PRP) supports sustained release of the proteins.
• The CF/PRP complex enhanced the fibroblast and keratinocyte cell proliferation and migration in vitro.
• Diabetic C57BL/6 mice treated with CF/PRP showed enhanced wound contraction facilitated by cell proliferation and collagen and cytokeratin deposition.
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Rao, S.S., Venkatesan, J., Yuvarajan, S. et al. Self-assembled polyelectrolyte complexes of chitosan and fucoidan for sustained growth factor release from PRP enhance proliferation and collagen deposition in diabetic mice. Drug Deliv. and Transl. Res. 12, 2838–2855 (2022). https://doi.org/10.1007/s13346-022-01144-3
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DOI: https://doi.org/10.1007/s13346-022-01144-3