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• W2037605285 endingPage "17042" @default.
• W2037605285 startingPage "17031" @default.
• W2037605285 abstract "Abstract A series of pyridine‐based derivatives of the clinically successful Ru III ‐based complexes indazolium [ trans ‐RuCl 4 (1 H ‐indazole) 2 ] (KP1019) and sodium [ trans ‐RuCl 4 (1 H ‐indazole) 2 ] (KP1339) have been synthesized to probe the effect of hydrophobic interactions with human serum albumin (hsA) on anticancer activity. The solution behavior and protein interactions of the new compounds were characterized by using electron paramagnetic resonance (EPR) and UV/Vis spectroscopy. These studies have revealed that incorporation of hydrophobic substituents at the 4′‐position of the axial pyridine ligand stabilizes non‐coordinate interactions with hsA. As a consequence, direct coordination to the protein is inhibited, which is expected to increase the bioavailability of the complexes, thus potentially leading to improved anticancer activity. By using this approach, the lifetimes of hydrophobic protein interactions were extended from 2 h for the unsubstituted pyridine complex, to more than 24 h for several derivatives. Free complexes were tested for their anticancer activity against the SW480 human colon carcinoma cell line, exhibiting low cytotoxicity. Pre‐treatment with hsA improved the solubility of every compound and led to some changes in activity. Particularly notable was the difference in activity between the methyl‐ and dibenzyl‐functionalized complexes. The former shows reduced activity after incubation with hsA, indicating reduced bioavailability due to protein coordination. The latter exhibits little activity on its own but, following treatment with hsA, exhibited significant cytotoxicity, which is consistent with its ability to form non‐coordinate interactions with the protein. Overall, our studies demonstrate that non‐coordinate interactions with hsA are a viable target for enhancing the activity of Ru III ‐based complexes in vivo." @default.
• W2037605285 created "2016-06-24" @default.
• W2037605285 creator A5008025865 @default.
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• W2037605285 date "2013-11-07" @default.
• W2037605285 modified "2023-10-18" @default.
• W2037605285 title "Increasing the Bioavailability of Ru^IIIAnticancer Complexes through Hydrophobic Albumin Interactions" @default.
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• W2037605285 doi "https://doi.org/10.1002/chem.201302671" @default.
• W2037605285 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24203647" @default.
• W2037605285 hasPublicationYear "2013" @default.
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