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- W4285585538 abstract "Tankyrase inhibition stabilises AXINs and antagonises the Wnt/β-catenin pathway in adenomatous polyposis coli (APC)-mutated colorectal cancer (CRC), suggesting that tankyrase is a potential therapeutic target for APC-mutated CRC. However, clinical trials on reported tankyrase inhibitors have been severely limited by on-target toxicity in the gastrointestinal (GI) tract. Herein, we report a new tankyrase-selective inhibitor, STP1002, having preclinical antitumour efficacy without on-target toxicity in APC-mutated CRC models.STP1002 was developed and characterised using in vitro and in vivo functional studies; its pharmacokinetics, antitumour efficacy and toxicity were evaluated in vivo.STP1002 showed potent, selective inhibition of tankyrase 1/2 but not of members of the poly (ADP-ribose) polymerase 1/2 (PARP1/2). STP1002 exerted antitumour activity by stabilising AXINs and antagonising the Wnt/β-catenin pathway in a subset of APC-mutated CRC cell lines but not in inhibitor-resistant cells and APC-wild-type CRC cell lines. STP1002 showed favourable pharmacokinetic profiles for oral administration once daily. STP1002 inhibited tumour growth of APC-mutated CRC xenograft animal models but not of APC-wild type models in a dose-dependent manner. The antitumour efficacy of STP1002 was confirmed using APC-mutated CRC patient-derived tumour xenograft models. STP1002 showed no significant on-target toxicity in the GI tract compared to G007-LK, which shows severe ileum toxicity in preclinical animal models.These results demonstrate that STP1002, a novel, orally active tankyrase inhibitor, shows preclinical antitumour efficacy without on-target toxicity in the GI tract. Our data provide a rationale for a clinical trial on STP1002 as a potential tankyrase-targeted drug in patients with APC-mutated CRC." @default.
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- W4285585538 date "2022-09-01" @default.
- W4285585538 modified "2023-09-29" @default.
- W4285585538 title "Tankyrase-selective inhibitor STP1002 shows preclinical antitumour efficacy without on-target toxicity in the gastrointestinal tract" @default.
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- W4285585538 doi "https://doi.org/10.1016/j.ejca.2022.06.031" @default.
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