Experimental compound T2 shows promise in limiting breast cancer progression in mouse model
Researchers report that thiosemicarbazone T2 suppresses WNT/β-catenin signaling and reduces progression from non-invasive to invasive disease in a mouse model of triple-negative breast cancer (TNBC). The compound also elevated levels of the metastasis suppressor NDRG1 and modulated associated microRNAs in cell and animal experiments. These findings suggest T2 may warrant further preclinical investigation as a potential anti-invasive agent for TNBC, an aggressive cancer subtype with limited targeted treatment options.
A study posted to bioRxiv examined the anti-invasive mechanisms of T2, an N4-aryl-substituted thiosemicarbazone, in triple-negative breast cancer (TNBC). Using 4T1 cell cultures and a fully immunocompetent intraductal mouse model (MIND model) that mimics progression from ductal carcinoma in situ (DCIS) to invasive ductal carcinoma (IDC), researchers found that T2 reduced WNT/β-catenin signaling and modulated the microRNAs miR-182-5p and miR-200c in vitro. In the animal model, T2 decreased the frequency of invasive lesions and lowered expression of β-catenin, ZEB1, and c-Myc while increasing levels of NDRG1, a known metastasis suppressor. The study also observed that β-catenin localization differed between lesion types, appearing predominantly at cell membranes in DCIS lesions but distributed diffusely in the cytoplasm in invasive foci, a distinction that may reflect mechanistic differences in disease progression. The authors conclude that WNT/β-catenin and NDRG1-associated pathways are likely mediators of T2's anti-invasive effects and call for further preclinical studies.
What's missing
As a preprint, this study has not yet undergone peer review. Key limitations include reliance on a single mouse cell line (4T1) and animal model, with no human clinical data; the pharmacokinetics, toxicity profile, and therapeutic dosing of T2 in vivo are not characterized in this report. The precise causal relationship between NDRG1 upregulation and WNT/β-catenin suppression remains to be mechanistically established. Whether findings will translate to human TNBC biology is unknown.
What different sources said
- bioRxivCenter
Thiosemicarbazone T2 suppresses WNT/β-catenin signaling and limits progression to invasive disease in a mouse intraductal model of triple-negative breast cancer
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