This is an open-label, multicenter, dose-escalation study to evaluate the safety, tolerability, and pharmacokinetics (PK) and to determine the maximum tolerated dose (MTD) of STP1002 in patients with advanced-stage solid tumors.

Start Date30 Jul 2020

Sponsor / Collaborator

ST Pharm Co., Ltd.

[+1]

100 Clinical Results associated with Basroparib

100 Translational Medicine associated with Basroparib

100 Patents (Medical) associated with Basroparib

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01 Sep 2022·European Journal of Cancer

Tankyrase-selective inhibitor STP1002 shows preclinical antitumour efficacy without on-target toxicity in the gastrointestinal tract

Article

Author: Kim, Dong Young ; Choi, Seong Mi ; Kim, Kyungjin ; Seo, Won Yong ; Bang, Hyung Tae ; Kim, Uk-Il ; Ahn, Seohyun ; Kwon, Young-Ju ; Kim, Jae-Sung

BACKGROUNDTankyrase 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.METHODSSTP1002 was developed and characterised using in vitro and in vivo functional studies; its pharmacokinetics, antitumour efficacy and toxicity were evaluated in vivo.RESULTSSTP1002 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.CONCLUSIONSThese 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.

100 Deals associated with Basroparib

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Indication	Highest Phase	Country/Location	Organization	Date
Advanced Malignant Solid Neoplasm	Phase 1	US	ST Pharm Co., Ltd.	30 Jul 2020

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