The Achilles’ heel of senescent cells: from transcriptome to senolytic drugs
Version of Record online: 22 APR 2015
© 2015 The Authors. Aging Cell published by the Anatomical Society and John Wiley & Sons Ltd.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Volume 14, Issue 4, pages 644–658, August 2015
How to Cite
Zhu, Y., Tchkonia, T., Pirtskhalava, T., Gower, A. C., Ding, H., Giorgadze, N., Palmer, A. K., Ikeno, Y., Hubbard, G. B., Lenburg, M., O'Hara, S. P., LaRusso, N. F., Miller, J. D., Roos, C. M., Verzosa, G. C., LeBrasseur, N. K., Wren, J. D., Farr, J. N., Khosla, S., Stout, M. B., McGowan, S. J., Fuhrmann-Stroissnigg, H., Gurkar, A. U., Zhao, J., Colangelo, D., Dorronsoro, A., Ling, Y. Y., Barghouthy, A. S., Navarro, D. C., Sano, T., Robbins, P. D., Niedernhofer, L. J. and Kirkland, J. L. (2015), The Achilles’ heel of senescent cells: from transcriptome to senolytic drugs. Aging Cell, 14: 644–658. doi: 10.1111/acel.12344
- Issue online: 14 JUL 2015
- Version of Record online: 22 APR 2015
- Accepted manuscript online: 9 MAR 2015 08:56AM EST
- NIH. Grant Numbers: AG013925, AG041122, AG031736, AG044396, DK050456, HL111121, AG043376
- Glenn, Ted Nash Long Life
- Noaber Foundations
- CTSA. Grant Number: UL1-TR000157
- dependence receptors;
- PI3K delta;
- plasminogen-activated inhibitor;
The healthspan of mice is enhanced by killing senescent cells using a transgenic suicide gene. Achieving the same using small molecules would have a tremendous impact on quality of life and the burden of age-related chronic diseases. Here, we describe the rationale for identification and validation of a new class of drugs termed senolytics, which selectively kill senescent cells. By transcript analysis, we discovered increased expression of pro-survival networks in senescent cells, consistent with their established resistance to apoptosis. Using siRNA to silence expression of key nodes of this network, including ephrins (EFNB1 or 3), PI3Kδ, p21, BCL-xL, or plasminogen-activated inhibitor-2, killed senescent cells, but not proliferating or quiescent, differentiated cells. Drugs targeting these same factors selectively killed senescent cells. Dasatinib eliminated senescent human fat cell progenitors, while quercetin was more effective against senescent human endothelial cells and mouse BM-MSCs. The combination of dasatinib and quercetin was effective in eliminating senescent MEFs. In vivo, this combination reduced senescent cell burden in chronologically aged, radiation-exposed, and progeroid Ercc1−/Δ mice. In old mice, cardiac function and carotid vascular reactivity were improved 5 days after a single dose. Following irradiation of one limb in mice, a single dose led to improved exercise capacity for at least 7 months following drug treatment. Periodic drug administration extended healthspan in Ercc1−/∆ mice, delaying age-related symptoms and pathology, osteoporosis, and loss of intervertebral disk proteoglycans. These results demonstrate the feasibility of selectively ablating senescent cells and the efficacy of senolytics for alleviating symptoms of frailty and extending healthspan.