Human platelet lysate-cultured adipose-derived stem cell sheets promote angiogenesis and accelerate wound healing via CCL5 modulation.

Publisher: BioMed Central Country of Publication: England NLM ID: 101527581 Publication Model: Electronic Cited Medium: Internet ISSN: 1757-6512 (Electronic) Linking ISSN: 17576512 NLM ISO Abbreviation: Stem Cell Res Ther Subsets: MEDLINE

Original Publication: London : BioMed Central

Wound Healing* ; Blood Platelets*/metabolism ; Neovascularization, Physiologic* ; Chemokine CCL5*/metabolism ; Adipose Tissue*/cytology ; Adipose Tissue*/metabolism; Animals ; Humans ; Rats ; Stem Cells/metabolism ; Stem Cells/cytology ; Rats, Sprague-Dawley ; Cells, Cultured ; Male ; Stem Cell Transplantation/methods ; Angiogenesis

Background: A rising population faces challenges with healing-impaired cutaneous wounds, often leading to physical disabilities. Adipose-derived stem cells (ASCs), specifically in the cell sheet format, have emerged as a promising remedy for impaired wound healing. Human platelet lysate (HPL) provides an attractive alternative to fetal bovine serum (FBS) for culturing clinical-grade ASCs. However, the potential of HPL sheets in promoting wound healing has not been fully investigated. This study aimed to explore the anti-fibrotic and pro-angiogenic capabilities of HPL-cultured ASC sheets and delve into the molecular mechanism.
Methods: A rat burn model was utilized to evaluate the efficacy of HPL-cultured ASC sheets in promoting wound healing. ASC sheets were fabricated with HPL, and those with FBS were included for comparison. Various analyses were conducted to assess the impact of HPL sheets on wound healing. Histological examination of wound tissues provided insights into aspects such as wound closure, collagen deposition, and overall tissue regeneration. Immunofluorescence was employed to assess the presence and distribution of transplanted ASCs after treatment. Further in vitro studies were conducted to decipher the specific factors in HPL sheets contributing to angiogenesis.
Results: HPL-cultured ASC sheets significantly accelerated wound closure, fostering ample and organized collagen deposition in the neo-dermis. Significantly more retained ASCs were observed in wound tissues treated with HPL sheets compared to the FBS counterparts. Moreover, HPL sheets mitigated macrophage recruitment and decreased subsequent wound tissue fibrosis in vivo. Immunohistochemistry also indicated enhanced angiogenesis in the HPL sheet group. The in vitro analyses showed upregulation of C-C motif chemokine ligand 5 (CCL5) and angiogenin in HPL sheets, including both gene expression and protein secretion. Culturing endothelial cells in the conditioned media compared to media supplemented with CCL5 or angiogenin suggested a correlation between CCL5 and the pro-angiogenic effect of HPL sheets. Additionally, through neutralizing antibody experiments, we further validated the crucial role of CCL5 in HPL sheet-mediated angiogenesis in vitro.
Conclusions: The present study underscores CCL5 as an essential factor in the pro-angiogenic effect of HPL-cultured ASC sheets during the wound healing process. These findings highlight the potential of HPL-cultured ASC sheets as a promising therapeutic option for healing-impaired cutaneous wounds in clinical settings. Furthermore, the mechanism exploration yields valuable information for optimizing regenerative strategies with ASC products.
Brief Acknowledgment: This research was supported by the National Science and Technology Council, Taiwan (NSTC112-2321-B-002-018), National Taiwan University Hospital (111C-007), and E-Da Hospital-National Taiwan University Hospital Joint Research Program (111-EDN0001, 112-EDN0002).
(© 2024. The Author(s).)

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NSTC 112-2321-B-002-018 National Science and Technology Council; 111C-007, 111- EDN0001, 112-EDN0002 National Taiwan University Hospital

Keywords: Adipose-derived stem cells; Angiogenesis; CCL5; Cell sheet; Wound healing

0 (Chemokine CCL5)

Date Created: 20240609 Date Completed: 20240609 Latest Revision: 20240612

20240612

PMC11163789

10.1186/s13287-024-03762-9

38853252