Telomeres, Telomerase, and Senescence
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A chimeric matchmaker peptide is designed, which targets a senescent cell-specific surface marker and modifies the cell surface with polyglutamic acid, which promotes interactions with natural killer cells and senescent cell clearance in liver fibrosis, lung injury, cancer and natural aging.
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The accumulation of senescent cells can lead to tissue degeneration, chronic inflammatory disease and age-related tumorigenesis. Interventions such as senolytics are currently limited by off-target toxicity, which could be circumvented by instead enhancing immune-mediated senescent cell clearance; however, immune surveillance of senescent cells is often impeded by immunosuppressive factors in the inflammatory microenvironment. Here, we employ a chimeric peptide as a 'matchmaker' to bind to the urokinase-type plasminogen activator receptor, a cell surface marker of senescent cells. This peptide modifies the cell surface with polyglutamic acid, promoting immune cell-mediated responses through glutamate recognition. By enhancing the recruitment of immune cells and directly coupling senescent cells and immune cells, we show that this chimeric peptide induces immune clearance of senescent cells and restores tissue homeostasis in conditions such as liver fibrosis, lung injury, cancer and natural aging in mice. This chimeric peptide introduces an immunological conversion strategy that rebalances the senescent immune microenvironment, offering a promising direction for aging immunotherapy.
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@article{Ming2024chimeric,
title = {A chimeric peptide promotes immune surveillance of senescent cells in injury, fibrosis, tumorigenesis and aging},
author = {Xinliang Ming and Ze Yang and Yuqiao Huang and Zhiguo Wang and Qingyan Zhang and Changchang Lu and Yandi Sun and Yuanhao Chen and Liang Zhang and Jicheng Wu and Hao Shou and Zhimin Lu and Ben Wang},
journal = {Nature Aging},
year = {2024},
doi = {10.1038/s43587-024-00750-9},
url = {https://doi.org/10.1038/s43587-024-00750-9}
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