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Phase II biotransformations are detoxification mechanisms that conjugate xenobiotics with endogenous substances, neutralizing their toxicity.
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Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
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Sulfonated Schiff base Sn(IV) complexes as potential anticancer agents.

Susanta Hazra1, Anup Paul1, Gunjan Sharma2

  • 1Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal.

Journal of Inorganic Biochemistry
|June 25, 2016
PubMed
Summary
This summary is machine-generated.

New tin(IV) compounds show significant anticancer activity. Compound 2, derived from a Schiff base ligand, effectively targets A-549 lung cancer cells by inducing apoptosis through reactive oxygen species generation.

Keywords:
Cytotoxicity in vitroDNA bindingDiorgano dinuclear Sn(IV)Reactive oxygen speciesSulfonated Schiff base

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Area of Science:

  • Organometallic Chemistry
  • Coordination Chemistry
  • Chemical Biology

Background:

  • Schiff base ligands are versatile in coordinating metal ions.
  • Diorgano tin(IV) complexes are explored for biological applications.
  • Understanding structure-activity relationships is crucial for drug development.

Purpose of the Study:

  • Synthesize and characterize novel diphenoxo-bridged diorgano dinuclear Sn(IV) compounds.
  • Investigate the DNA binding and antiproliferative activities of these tin complexes.
  • Elucidate the mechanism of action for the most potent compound.

Main Methods:

  • Synthesis and structural determination of tin(IV) complexes using Schiff base ligand H3L.
  • Spectroscopic studies (UV-vis, fluorescence) for DNA binding analysis.
  • In vitro antiproliferative assays (MTT) on human cancer cell lines (A-549, HeLa, MDA-MB-231).
  • Apoptosis studies using FACS, Hoechst/PI staining, and ROS generation assays.

Main Results:

  • Two dinuclear Sn(IV) compounds, [Sn(Et)2(HL)(H2O)]2 (1) and [Sn(n-Bu)2(HL)(H2O)]2 (2), were synthesized and structurally characterized.
  • Compound 2 exhibited significant cytotoxicity, particularly against A-549 lung cancer cells, with IC50 values in the micromolar range.
  • DNA binding studies indicated interaction with DNA, and apoptosis induction was confirmed via ROS generation and cell morphology changes.

Conclusions:

  • The synthesized dinuclear Sn(IV) complexes display promising anticancer properties.
  • Compound 2 demonstrates substantial cytotoxicity, making it a potential candidate for further investigation in lung cancer therapy.
  • The observed antiproliferative effects are likely mediated through apoptosis induction via ROS generation.