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16:11
Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
Published on: June 8, 2022
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Exploring the Biological Properties of Zn(II) Bisthiosemicarbazone Helicates
Sandra Fernández-Fariña1, Isabel Velo-Heleno1, Rocío Carballido1
1Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
International Journal of Molecular Sciences
|February 11, 2023
Summary
Researchers developed novel zinc helicates with low toxicity and potential anticancer properties. The study investigated how ligand modifications affect the biological activity of these metallosupramolecular compounds.
Area of Science:
- Metallosupramolecular Chemistry
- Coordination Chemistry
- Medicinal Chemistry
Background:
- Designing artificial helicoidal molecules from metal ions with biological properties is a key goal in metallosupramolecular chemistry.
- Bisthiosemicarbazone ligands offer a versatile platform for creating novel metal complexes.
Purpose of the Study:
- To synthesize and characterize three zinc helicates using different terminal groups on bisthiosemicarbazone ligands.
- To evaluate the biological properties of these zinc helicates, including toxicity and potential anticancer activity.
- To determine the effect of ligand terminal substituents on the toxicity and antitumor efficacy of zinc helicates.
Main Methods:
- Electrochemical synthesis of zinc helicates.
- Full characterization using techniques including X-ray diffraction.
- Biological assays: erythrocyte toxicity, protein and oligonucleotide interaction studies, in vitro cytotoxicity against human carcinoma cell lines (MCF-7, A2780, NCI-H460) and normal fibroblasts (MRC-5).
Main Results:
- Three zinc helicates (Zn₂(LMe)₂, Zn₂(LPh)₂, Zn₂(LPhNO₂)₂) were successfully synthesized and characterized.
- The zinc helicates exhibited low toxicity towards erythrocytes and no covalent interactions with proteins or oligonucleotides.
- In vitro cytotoxicity assays showed varying IC₅0 values against cancer cell lines, with comparisons made to cisplatin.
Conclusions:
- The synthesized zinc helicates are stable, non-toxic to erythrocytes, and do not covalently bind to biomacromolecules.
- The study provides a basis for understanding the structure-activity relationships of zinc helicates in cancer therapy.
- Further investigation is warranted to explore the potential of these compounds as anticancer agents and the influence of ligand design on their efficacy.
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