Abstract:
:Tumor cells undergo senescence in response to both conventional and targeted cancer therapies. The induction of senescence in response to cancer therapy can contribute to unfavorable patient outcomes, potentially including disease relapse. This possibiliy is supported by our findings that tumor cells induced into senescence by doxorubicin or etoposide can give rise to viable tumors in vivo. We further demonstrate sensitivity of these senescent tumor cells to the senolytic ABT-263 (navitoclax), therefore providing a "two-hit" approach to eliminate senescent tumor cells that persist after exposure to chemotherapy or radiation. The sequential combination of therapy-induced senescence and ABT-263 could shift the response to therapy toward apoptosis by interfering with the interaction between BCL-XL and BAX. The administration of ABT-263 after either etoposide or doxorubicin also resulted in marked, prolonged tumor suppression in tumor-bearing animals. These findings support the premise that senolytic therapy following conventional cancer therapy may improve therapeutic outcomes and delay disease recurrence.
journal_name
Mol Oncoljournal_title
Molecular oncologyauthors
Saleh T,Carpenter VJ,Tyutyunyk-Massey L,Murray G,Leverson JD,Souers AJ,Alotaibi MR,Faber AC,Reed J,Harada H,Gewirtz DAdoi
10.1002/1878-0261.12761subject
Has Abstractpub_date
2020-10-01 00:00:00pages
2504-2519issue
10eissn
1574-7891issn
1878-0261journal_volume
14pub_type
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