Metal Complexes of a 5-Nitro-8-Hydroxyquinoline-Proline Hybrid with Enhanced Water Solubility Targeting Multidrug Resistant Cancer Cells

Multidrug resistance (MDR) in cancer is one of the major obstacles of chemotherapy. We have recently identified a series of 8-hydroxyquinoline Mannich base derivatives with MDR-selective toxicity, however with limited solubility. In this work, a novel 5-nitro-8-hydroxyquinoline-proline hybrid and it...

Teljes leírás

Elmentve itt :
Bibliográfiai részletek
Szerzők: Pivarcsik Tamás
Pósa Vivien
Kovács Hilda
May Nóra Veronika
Spengler Gabriella
Pósa Szonja P.
Tóth Szilárd
Nezafat Yazdi Zeinab
Laczka Csilla
Ugrai Imre
Szatmári István
Szakács Gergely
Enyedy Éva Anna
Dokumentumtípus: Cikk
Megjelent: 2023
Sorozat:INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 24 No. 1
Tárgyszavak:
doi:10.3390/ijms24010593

mtmt:33532438
Online Access:http://publicatio.bibl.u-szeged.hu/26003
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520 3 |a Multidrug resistance (MDR) in cancer is one of the major obstacles of chemotherapy. We have recently identified a series of 8-hydroxyquinoline Mannich base derivatives with MDR-selective toxicity, however with limited solubility. In this work, a novel 5-nitro-8-hydroxyquinoline-proline hybrid and its Rh(η5-C5Me5) and Ru(η6-p-cymene) complexes with excellent aqueous solubility were developed, characterized, and tested against sensitive and MDR cells. Complex formation of the ligand with essential metal ions was also investigated using UV-visible, circular dichroism, 1H NMR (Zn(II)), and electron paramagnetic resonance (Cu(II)) spectroscopic methods. Formation of mono and bis complexes was found in all cases with versatile coordination modes, while tris complexes were also formed with Fe(II) and Fe(III) ions, revealing the metal binding affinity of the ligand at pH 7.4: Cu(II) > Zn(II) > Fe(II) > Fe(III). The ligand and its Rh(III) complex displayed enhanced cytotoxicity against the resistant MES-SA/Dx5 and Colo320 human cancer cell lines compared to their chemosensitive counterparts. Both organometallic complexes possess high stability in solution, however the Ru(II) complex has lower chloride ion affinity and slower ligand exchange processes, along with the readiness to lose the arene ring that is likely connected to its inactivity. 
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700 0 1 |a Kovács Hilda  |e aut 
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700 0 2 |a Szakács Gergely  |e aut 
700 0 2 |a Enyedy Éva Anna  |e aut 
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