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- W4361948347 abstract "<div>AbstractPurpose:<p>Despite approval of B-cell lymphoma (BCL)-2 inhibitor venetoclax for certain hematologic malignancies, its broader clinical benefit is curtailed by resistance. Our study aimed to determine if treatment with novel anticancer agents targeting BCL-2 and mouse double minute 2 (MDM2) could overcome venetoclax resistance in preclinical models.</p>Experimental Design:<p>Venetoclax-sensitive and venetoclax-resistant acute myeloid leukemia (AML) and acute lymphoblastic leukemia cells and xenograft models were used to evaluate antitumor effects and underlying mechanisms associated with combined BCL-2 inhibitor lisaftoclax (APG-2575) and MDM2 inhibitor alrizomadlin (APG-115).</p>Results:<p>The combination exhibited synergistic antiproliferative and apoptogenic activities in <i>TP53</i> wild-type AML cell lines <i>in vitro</i>. This synergy was further exemplified by deep antitumor responses and prolonged survival in AML cell line–derived and patient-derived xenograft models. Interestingly, the combination treatment resensitized (to apoptosis) venetoclax-resistant cellular and mouse models established via chronic drug exposure or genetically engineered with clinically relevant <i>BCL-2</i> gene mutations. Synergistic effects in reducing cellular viability and proliferation were also demonstrated in primary samples of patients with venetoclax-resistant AML treated with lisaftoclax and alrizomadlin <i>ex vivo</i>. Mechanistically, alrizomadlin likely primes cancer cells to BCL-2 inhibition-induced cellular apoptosis by downregulating expression of antiapoptotic proteins myeloid cell leukemia-1 and BCL–extra-large and upregulating pro-death BCL-2–associated X protein.</p>Conclusions:<p>Lisaftoclax in combination with alrizomadlin overcomes venetoclax resistance mediated by various mechanisms, including <i>BCL-2</i> mutations. In addition, we posit further, putative molecular mechanisms. Our data rationalize clinical development of this treatment combination in patients with diseases that are insensitive or resistant to venetoclax.</p></div>" @default.
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- W4361948347 date "2023-04-01" @default.
- W4361948347 modified "2023-10-18" @default.
- W4361948347 title "Data from Lisaftoclax in Combination with Alrizomadlin Overcomes Venetoclax Resistance in Acute Myeloid Leukemia and Acute Lymphoblastic Leukemia: Preclinical Studies" @default.
- W4361948347 doi "https://doi.org/10.1158/1078-0432.c.6532827" @default.
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