Antiaging Vaccines Targeting Senescent Cells

炎症 生物 免疫学 嵌合抗原受体 癌症研究 医学 免疫系统 免疫疗法
作者
Andrew R. Mendelsohn,James W. Larrick
出处
期刊:Rejuvenation Research [Mary Ann Liebert, Inc.]
卷期号:25 (1): 39-45 被引量:22
标识
DOI:10.1089/rej.2022.0008
摘要

The development of senomorphic drugs to attenuate the senescent phenotype and senolytics to clear pro-inflammatory senescent cells (SCs) to treat aging-associated disorders is being hotly pursued. The effort is complicated by the fact that SCs play a constructive role in some cellular processes such as tissue repair and wound healing. However, concerns about efficacy, which SCs to target, and unwanted side effects have created potential roadblocks. Chimeric antigen receptor T cells directed against urokinase-type plasminogen activator receptor, which is expressed on at least a subset of SCs in atherosclerotic plaques and fibrotic livers, removed SC and improved glucose metabolism. A vaccine targeting CD153-expressing senescent T cells also improved glucose metabolism in obese mice. Recent work to selectively target SCs associated with several pathologies has resulted in the creation of a peptide vaccine that primarily targets endothelial cells expressing high levels of GPNMB, recently identified as a biomarker of senescence. The vaccine reduces atherosclerotic plaque burden and metabolic dysfunction such as glucose intolerance in mouse models of obesity and atherosclerosis. For translation to humans the activity of the vaccine will need to be tightly controlled, as the target GPNMB has multiple roles in normal physiology, including acting to inhibit and possibly resolve inflammation. A promising alternative approach would be to use passive immunization with a monoclonal antibody directed against GPNMB.
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