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• W1976636725 abstract "Abstract Background Identification of new drugs against paediatric sarcomas represents an urgent clinical need that mainly relies on public investments due to the rarity of these diseases. In this paper we evaluated the in vitro and in vivo efficacy of a new maltol derived molecule (maltonis), belonging to the family of molecules named hydroxypyrones. Methods Maltonis was screened for its ability to induce structural alteration of DNA molecules in comparison to another maltolic molecule (malten). In vitro antitumour efficacy was tested using a panel of sarcoma cell lines, representative of Ewing sarcoma, osteosarcoma and rhabdomyosarcoma, the three most common paediatric sarcomas, and in normal human mesenchymal primary cell cultures. In vivo efficacy was tested against TC-71 Ewing sarcoma xenografts. Results Maltonis, a soluble maltol-derived synthetic molecule, was able to alter the DNA structure, inhibit proliferation and induce apoptotic cell death in paediatric sarcoma cells, either sensitive or resistant to some conventional chemotherapeutic drugs, such as doxorubicin and cisplatin. In addition, maltonis was able to induce: i) p21, p15 and Gadd45a mRNA upregulation; ii) Bcl-2, survivin, CDK6 and CDK8 down-regulation; iii) formation of γ-H2AX nuclear foci; iv) cleavage of PARP and Caspase 3. Two independent in vivo experiments demonstrated the tolerability and efficacy of maltonis in the inhibition of tumour growth. Finally maltonis was not extruded by ABCB1, one of the major determinants of chemotherapy failure, nor appeared to be a substrate of the glutathione-related detoxification system. Conclusions Considering that treatment of poorly responsive patients still suffers for the paucity of agents able to revert chemoresistance, maltonis may be considered for the future development of new therapeutic approaches for refractory metastatic patients." @default.
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• W1976636725 date "2014-02-27" @default.
• W1976636725 modified "2023-10-18" @default.
• W1976636725 title "An aza-macrocycle containing maltolic side-arms (maltonis) as potential drug against human pediatric sarcomas" @default.
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• W1976636725 doi "https://doi.org/10.1186/1471-2407-14-137" @default.
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