Related Experiment Video
Updated: Jan 23, 2026
07:20
Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
Published on: May 28, 2014
14.4K
Photocytotoxic Pt(iv) complexes as prospective anticancer agents.
Giovanni Canil1, Simona Braccini1, Tiziano Marzo2
1Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124 Pisa, Italy. chiara.gabbiani@unipi.it.
Dalton Transactions (Cambridge, England : 2003)
|June 6, 2019
Summary
New platinum(IV) complexes show promise as photoactivatable anticancer drugs. These compounds are stable in the dark but become cytotoxic upon light exposure, offering a targeted photochemotherapy approach.
Area of Science:
- Inorganic Chemistry
- Medicinal Chemistry
- Materials Science
Background:
- Platinum(IV) complexes offer advantages over Platinum(II) drugs, including enhanced stability and reduced side effects.
- Photoactivatable platinum(IV) complexes enable targeted drug delivery via photochemotherapy.
- Expanding the library of photoactivatable platinum(IV) prodrugs is crucial for advancing cancer treatment.
Purpose of the Study:
- To synthesize and characterize novel photoactivatable platinum(IV) complexes.
- To investigate the stability, photoreduction, and cytotoxic activity of these new compounds.
- To elucidate the mechanism of action, including interactions with biological targets.
Main Methods:
- Oxidation of a platinum(II) precursor using PhICl2 or H2O2 to form platinum(IV) complexes.
- Characterization of the synthesized platinum(IV) complexes using spectroscopic and electrochemical methods.
- Assessment of cytotoxicity against A2780 and A2780cis cancer cell lines and evaluation of interactions with protein and DNA models via mass spectrometry.
Main Results:
- Two novel platinum(IV) complexes, [PtCl3(4'-phenyl-2,2':6',2''-terpyridine)][CF3SO3] (2) and [Pt(OCOCH3)2Cl(4'-phenyl-2,2':6',2''-terpyridine)][CF3SO3] (3), were synthesized.
- Complexes 2 and 3 demonstrated stability in physiological conditions and underwent photoreduction to the platinum(II) precursor upon irradiation at 365 nm.
- Complex 3 exhibited lower dark toxicity and significantly enhanced photocytotoxicity compared to cisplatin, with notable stability in the presence of glutathione.
Conclusions:
- The synthesized platinum(IV) complexes function as effective prodrugs, releasing active platinum species upon light activation.
- Complex 3 shows particular promise for photochemotherapy due to its tunable stability and potent photo-induced cytotoxicity.
- These findings contribute to the development of advanced platinum-based anticancer agents with improved therapeutic potential.
Related Concept Videos
01:43Electron Transport Chain: Complex III and IV
9.1K
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
9.1K
01:20Antiarrhythmic Drugs: Class IV Agents as Calcium Channel Blockers
1.6K
Class IV antiarrhythmic drugs, such as verapamil and diltiazem, block calcium channels. They primarily affect the heart, slowing the conduction in calcium-dependent tissues like the SA and AV nodes. These drugs manage reentrant supraventricular tachycardia (SVT) and reduce ventricular rate in atrial flutter/fibrillation.
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
1.6K
01:29Subviral Agents
546
Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
546
02:41Protein Complex Assembly
16.7K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
16.7K
01:57Protein Complexes with Interchangeable Parts
2.9K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
2.9K
03:45Formation of Complex Ions
25.8K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
25.8K