细胞生物学
遗产管理(遗嘱认证法)
业务
生物
政治学
法学
作者
Bhavana Nayer,Jean L. Tan,Yasmin K. Alshoubaki,Yen‐Zhen Lu,Julien Legrand,Sinnee Lau,Nan Hu,Anthony Park,Xiaonong Wang,Daniela Amann‐Zalcenstein,Peter F. Hickey,Trevor Wilson,Gisela Kuhn,Ralph Müller,Ajithkumar Vasanthakumar,Shizuo Akira,Mikaël M. Martino
标识
DOI:10.1038/s41467-024-51353-2
摘要
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.
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