Local administration of regulatory T cells promotes tissue healing

Nayer, B; Tan, JL; Alshoubaki, YK; Lu, YZ; Legrand, JMD; Lau, S; Hu, N; Park, AJ; Wang, XN; Amann-Zalcenstein, D; Hickey, PF; Wilson, T; Kuhn, GA; M&#252;ller, R; Vasanthakumar, A; Akira, S; Martino, MM

Author(s): Nayer, B; Tan, JL; Alshoubaki, YK; Lu, YZ; Legrand, JMD; Lau, S; Hu, N; Park, AJ; Wang, XN; Amann-Zalcenstein, D; Hickey, PF; Wilson, T; Kuhn, GA; Müller, R; Vasanthakumar, A; Akira, S; Martino, MM;
Details: Publication Year 2024-09-09,Volume 15,Issue #1,Page 7863
Journal Title: Nature Communications
Abstract: Regulatory T cells (Tregs) are crucial immune cells for tissue repair and regeneration. However, their potential as a cell-based regenerative therapy is not yet fully understood. Here, we show that local delivery of exogenous Tregs into injured mouse bone, muscle, and skin greatly enhances tissue healing. Mechanistically, exogenous Tregs rapidly adopt an injury-specific phenotype in response to the damaged tissue microenvironment, upregulating genes involved in immunomodulation and tissue healing. We demonstrate that exogenous Tregs exert their regenerative effect by directly and indirectly modulating monocytes/macrophages (Mo/MΦ) in injured tissues, promoting their switch to an anti-inflammatory and pro-healing state via factors such as interleukin (IL)-10. Validating the key role of IL-10 in exogenous Treg-mediated repair and regeneration, the pro-healing capacity of these cells is lost when Il10 is knocked out. Additionally, exogenous Tregs reduce neutrophil and cytotoxic T cell accumulation and IFN-γ production in damaged tissues, further dampening the pro-inflammatory Mo/MΦ phenotype. Highlighting the potential of this approach, we demonstrate that allogeneic and human Tregs also promote tissue healing. Together, this study establishes exogenous Tregs as a possible universal cell-based therapy for regenerative medicine and provides key mechanistic insights that could be harnessed to develop immune cell-based therapies to enhance tissue healing.
Publisher: Springer Nature
Keywords: Animals; *T-Lymphocytes, Regulatory/immunology; *Wound Healing/immunology; *Interleukin-10/metabolism/genetics; Humans; Mice; *Macrophages/immunology; *Mice, Inbred C57BL; Male; Monocytes/immunology; Skin/immunology; Interferon-gamma/metabolism/immunology; Female
Research Division(s): Advanced Technology And Biology
PubMed ID: 39251592
Publisher's Version: https://doi.org/10.1038/s41467-024-51353-2
Open Access at Publisher's Site: https://doi.org/10.1038/s41467-024-51353-2
Terms of Use/Rights Notice: Refer to copyright notice on published article.

Creation Date: 2024-10-04 10:45:09

Last Modified: 2024-10-04 10:51:24