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Synthesis and Optimization of Nitroxide-Based Inhibitors of Ferroptotic Cell Death in Cancer Cells and Macrophages.


ABSTRACT: JP4-039 is an alkene peptide isostere that acts as a low-micromolar inhibitor of erastin- and RSL-3-induced ferroptotic cell death in the HT-1080 cell line. In this work, we have developed new synthetic strategies that allow access to analogues of this lead structure. Enantioselective vinylogous Mannich or cross-metathesis reactions were key to the preparation of a series of analogues that culminated in the preparation of the ca. 30-fold more potent analogue (S)-6c. Structure-activity relationship analyses used both HT-1080 cells and a luminescence-based ferroptosis assay in RAW 264.7 macrophages. In particular, α,α-disubstituted alkene peptide isosteres (Rα ≠ H) were found to exceed the potency of the corresponding glycine (Rα = H) derivatives.

SUBMITTER: Charaschanya M 

PROVIDER: S-EPMC8919392 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature

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Synthesis and Optimization of Nitroxide-Based Inhibitors of Ferroptotic Cell Death in Cancer Cells and Macrophages.

Charaschanya Manwika M   Maskrey Taber S TS   LaPorte Matthew G MG   Janjic Jelena M JM   Wipf Peter P  

ACS medicinal chemistry letters 20220204 3


JP4-039 is an alkene peptide isostere that acts as a low-micromolar inhibitor of erastin- and RSL-3-induced ferroptotic cell death in the HT-1080 cell line. In this work, we have developed new synthetic strategies that allow access to analogues of this lead structure. Enantioselective vinylogous Mannich or cross-metathesis reactions were key to the preparation of a series of analogues that culminated in the preparation of the <i>ca.</i> 30-fold more potent analogue (<i>S</i>)-<b>6c</b>. Structur  ...[more]

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