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Themed collection Metallodrugs: Activation, Targeting, and Delivery

32 items
Editorial

Themed Issue on “Metallodrugs: Activation, Targeting, and Delivery”

Welcome to this themed issue of Dalton Transactions entitled “Metallodrugs: Activation, Targeting and Delivery”.

Graphical abstract: Themed Issue on “Metallodrugs: Activation, Targeting, and Delivery”
Editorial

Dr Barnett Rosenberg – a Personal Perspective

This tribute to Dr Rosenberg is especially fitting, as an introduction to this themed issue, since the discovery of Cisplatin has not only had an enormous impact on the practice of modern day cancer chemotherapy, it has also promoted the explosive growth and maturity of the field of contemporary bioinorganic chemistry.

Graphical abstract: Dr Barnett Rosenberg – a Personal Perspective
Perspective

The Platin-X series: activation, targeting, and delivery

In this review, we discuss the attempts made by our lab to develop Pt(IV) prodrugs that can be activated and delivered using targeted nanodelivery systems.

Graphical abstract: The Platin-X series: activation, targeting, and delivery
Perspective

Platinum(IV) anticancer prodrugs – hypotheses and facts

Do we really know how “dual action” Pt(IV) work?

Graphical abstract: Platinum(iv) anticancer prodrugs – hypotheses and facts
Perspective

Peptide-mediated vectorization of metal complexes: conjugation strategies and biomedical applications

The rich chemical and structural versatility of transition metal complexes provides numerous novel paths to be pursued in the design of molecules that exert particular chemical or physicochemical effects that could operate over specific biological targets.

Graphical abstract: Peptide-mediated vectorization of metal complexes: conjugation strategies and biomedical applications
Open Access Frontier

Upconverting nanoparticles for the near infrared photoactivation of transition metal complexes: new opportunities and challenges in medicinal inorganic photochemistry

The article highlights the emergent use of upconverting nanoparticles as tools for the near infrared photoactivation of transition metal complexes.

Graphical abstract: Upconverting nanoparticles for the near infrared photoactivation of transition metal complexes: new opportunities and challenges in medicinal inorganic photochemistry
Frontier

Development of trackable metal-based drugs: new generation of therapeutic agents

Today, it is not sufficient to conceive an efficient drug, its mechanism of action have to be understood. To tackle this issue, trackable therapeutic agents are an interesting solution.

Graphical abstract: Development of trackable metal-based drugs: new generation of therapeutic agents
Communication

An acid-cleavable phthalocyanine tetramer as an activatable photosensitiser for photodynamic therapy

A novel self-quenched phthalocyanine tetramer has been prepared which can be activated in acidic environments, resulting in enhanced fluorescence emission and singlet oxygen production.

Graphical abstract: An acid-cleavable phthalocyanine tetramer as an activatable photosensitiser for photodynamic therapy
Communication

Derivatisation of buforin IIb, a cationic henicosapeptide, to afford its complexation to platinum(II) resulting in a novel platinum(II)–buforin IIb conjugate with anti-cancer activity

Herein we report the synthesis and anti-cancer activity of buforin IIb, its novel malonate derivative malBuf and its Pt(II) complex cis-[Pt(NH3)2(malBuf–2H)].

Graphical abstract: Derivatisation of buforin IIb, a cationic henicosapeptide, to afford its complexation to platinum(ii) resulting in a novel platinum(ii)–buforin IIb conjugate with anti-cancer activity
Open Access Communication

Spin-labelled photo-cytotoxic diazido platinum(IV) anticancer complex

We report the synthesis and characterisation of the nitroxide spin-labelled photoactivatable Pt(IV) prodrug trans,trans,trans-[Pt(N3)2(OH)(OCOCH2CH2CONH-TEMPO)(Py)2] (Pt-TEMPO).

Graphical abstract: Spin-labelled photo-cytotoxic diazido platinum(iv) anticancer complex
Open Access Communication

Towards 99mTc-based imaging agents with effective doxorubicin mimetics: a molecular and cellular study

99mTc and Re conjugates of Doxorubicin accumulate in the nucleus, bind tightly to DNA and retain hTopoII inhibition.

Graphical abstract: Towards 99mTc-based imaging agents with effective doxorubicin mimetics: a molecular and cellular study
Open Access Paper

Near infrared light-mediated photoactivation of cytotoxic Re(I) complexes by using lanthanide-doped upconversion nanoparticles

Photoactivation of cytotoxic Re(I) complexes by using lanthanide doped upconversion nanoparticles upon near infrared illumination was demonstrated to selectively activate Re(I) complexes in tumor cells for enhanced anti-cancer effect.

Graphical abstract: Near infrared light-mediated photoactivation of cytotoxic Re(i) complexes by using lanthanide-doped upconversion nanoparticles
Paper

Photoactive platinum(II) β-diketonates as dual action anticancer agents

Cyclometallated platinum(II) β-diketonates show significant photocytotoxicity in skin-keratinocyte HaCaT cells [IC50: ∼10 μM (visible light, 400–700 nm), ≥60 μM (dark)].

Graphical abstract: Photoactive platinum(ii) β-diketonates as dual action anticancer agents
Paper

Light-triggered CO delivery by a water-soluble and biocompatible manganese photoCORM

Careful design of the coligand of the photoCORM [MnBr(CO)3(pyTAm)] makes it highly stable and soluble in aqueous media and allows light-induced CO release to biological targets.

Graphical abstract: Light-triggered CO delivery by a water-soluble and biocompatible manganese photoCORM
Paper

Remote-controlled delivery of CO via photoactive CO-releasing materials on a fiber optical device

Although carbon monoxide (CO) delivery materials (CORMAs) have been generated, remote-controlled delivery with light-activated CORMAs at a local site has not been achieved.

Graphical abstract: Remote-controlled delivery of CO via photoactive CO-releasing materials on a fiber optical device
Paper

An upconversion nanoplatform for simultaneous photodynamic therapy and Pt chemotherapy to combat cisplatin resistance

Combined photodynamic therapy and Pt chemotherapy based on upconversion nanoparticles are very effective in killing cisplatin-resistant cancer cells.

Graphical abstract: An upconversion nanoplatform for simultaneous photodynamic therapy and Pt chemotherapy to combat cisplatin resistance
Paper

M2L4 coordination capsules with tunable anticancer activity upon guest encapsulation

Guest encapsulation can modulate the cytotoxicity of anthracene-based nano-capsules and broaden their applications from metallodrugs to biocompatible delivery systems.

Graphical abstract: M2L4 coordination capsules with tunable anticancer activity upon guest encapsulation
Paper

Cytotoxic hydrogen bridged ruthenium quinaldamide complexes showing induced cancer cell death by apoptosis

This report presents the first known p-cymene ruthenium quinaldamide complexes stabilised by a hydrogen-bridging atom, which are cytotoxic and show induced cancer cell death by apoptosis.

Graphical abstract: Cytotoxic hydrogen bridged ruthenium quinaldamide complexes showing induced cancer cell death by apoptosis
Paper

Hydroxyapatite nanocrystals as a smart, pH sensitive, delivery system for kiteplatin

Synthetic hydroxyapatite nanocrystals are proposed as a pH-sensitive carrier capable to release an antitumor platinum-drug selectively at the tumor site.

Graphical abstract: Hydroxyapatite nanocrystals as a smart, pH sensitive, delivery system for kiteplatin
Paper

Anticancer potential of a photoactivated transplatin derivative containing the methylazaindole ligand mediated by ROS generation and DNA cleavage

Photoinduced DNA damage by trans-[PtCl2(NH3)(1-methyl-7-azaindole)] is related to its photocytotoxic activity.

Graphical abstract: Anticancer potential of a photoactivated transplatin derivative containing the methylazaindole ligand mediated by ROS generation and DNA cleavage
Paper

Gallium(III) and iron(III) complexes of quinolone antimicrobials

In an attempt to combine the antimicrobial properties of Ga3+ and quinolone antimicrobial agents, tris(quinolono)gallium(III) complexes were prepared. In the style of the Ga3+vs. Fe3+ “Trojan Horse” hypothesis, the bactericidal efficacy of these gallium(III) complexes was evaluated in direct comparison to their iron(III) analogs.

Graphical abstract: Gallium(iii) and iron(iii) complexes of quinolone antimicrobials
Paper

Dual-drug loaded nanoformulation with a galactosamine homing moiety for liver-targeted anticancer therapy

A platinum(IV) complex was prepared as a prodrug of cisplatin and co-loaded with α-tocopheryl succinate into the galactosamine-modified PLGA nanoparticle for combinational chemotherapy of liver cancer.

Graphical abstract: Dual-drug loaded nanoformulation with a galactosamine homing moiety for liver-targeted anticancer therapy
Open Access Paper

A multi-target caffeine derived rhodium(I) N-heterocyclic carbene complex: evaluation of the mechanism of action

A rhodium(I) and a ruthenium(II) complex with a caffeine derived N-heterocyclic carbene (NHC) ligand were biologically investigated as organometallic conjugates consisting of a metal center and a naturally occurring moiety.

Graphical abstract: A multi-target caffeine derived rhodium(i) N-heterocyclic carbene complex: evaluation of the mechanism of action
Paper

The length of the bridging chain in ansa-metallocenes influences their antiproliferative activity against triple negative breast cancer cells (TNBC)

[n]Ferrocenophane and [n]ruthenocenophane derivatives have been synthesized and their antiproliferative activity evaluated against MDA-MB-231 cells.

Graphical abstract: The length of the bridging chain in ansa-metallocenes influences their antiproliferative activity against triple negative breast cancer cells (TNBC)
Paper

Linker design for the modular assembly of multifunctional and targeted platinum(II)-containing anticancer agents

A versatile modular-synthetic scheme based on cleavable amide–ester linkers allows incorporation of platinum–acridines into multifunctional and targeted anticancer agents.

Graphical abstract: Linker design for the modular assembly of multifunctional and targeted platinum(ii)-containing anticancer agents
Paper

Synthesis, characterization and biological evaluation of labile intercalative ruthenium(II) complexes for anticancer drug screening

[Ru(tpy)(N^N)Cl]+ were synthesized for anticancer evolution. Ru2–Ru4 were dual-mode DNA-binding complexes and exhibited higher DNA binding affinity, better cellular uptake efficiency and higher anticancer activity than Ru1.

Graphical abstract: Synthesis, characterization and biological evaluation of labile intercalative ruthenium(ii) complexes for anticancer drug screening
Open Access Paper

Antiproliferative activity of ruthenium(II) arene complexes with mono- and bidentate pyridine-based ligands

The antitumour activity of RuII arene complexes with N-donor ligands is realised through inhibition of cell division accompanied by caspase-dependent apoptosis.

Graphical abstract: Antiproliferative activity of ruthenium(ii) arene complexes with mono- and bidentate pyridine-based ligands
Paper

Towards targeting anticancer drugs: ruthenium(II)–arene complexes with biologically active naphthoquinone-derived ligand systems

2-Hydroxy-[1,4]-naphthoquinone-derived ligands and their RuII6-p-cymene)Cl complexes were prepared with the aim to obtain multimodal anticancer agents.

Graphical abstract: Towards targeting anticancer drugs: ruthenium(ii)–arene complexes with biologically active naphthoquinone-derived ligand systems
Paper

Evaluation of H2CHXdedpa, H2dedpa- and H2CHXdedpa-N,N′-propyl-2-NI ligands for 64Cu(II) radiopharmaceuticals

Hexadentate acyclic chelate H2CHXdedpa and related N,N′-alkylated ligands are radiolabeled with radioactive 64Cu(II) under mild conditions forming kinetically inert complexes.

Graphical abstract: Evaluation of H2CHXdedpa, H2dedpa- and H2CHXdedpa-N,N′-propyl-2-NI ligands for 64Cu(ii) radiopharmaceuticals
Paper

Coumarin-appended phosphorescent cyclometalated iridium(III) complexes as mitochondria-targeted theranostic anticancer agents

Three phosphorescent cyclometalated iridium(III) complexes with mitochondria-specific localization and apoptosis-inducing capability have been explored as the theranostic anticancer agents.

Graphical abstract: Coumarin-appended phosphorescent cyclometalated iridium(iii) complexes as mitochondria-targeted theranostic anticancer agents
Paper

Encapsulation of lipophilic kiteplatin Pt(IV) prodrugs in PLGA-PEG micelles

PLGA-PEG nanoparticles loaded with Pt(IV) prodrugs of kiteplatin boost the antitumor effect of the drug and reduce its toxicity.

Graphical abstract: Encapsulation of lipophilic kiteplatin Pt(iv) prodrugs in PLGA-PEG micelles
Paper

808 nm photocontrolled UCL imaging guided chemo/photothermal synergistic therapy with single UCNPs-CuS@PAA nanocomposite

Recently, incorporating multiple components into one nanostructured matrix to construct a multifunctional nanomedical platform has attracted more and more attention for simultaneous anticancer diagnosis and therapy.

Graphical abstract: 808 nm photocontrolled UCL imaging guided chemo/photothermal synergistic therapy with single UCNPs-CuS@PAA nanocomposite
32 items

About this collection

In 1965, a seminal paper by Barnett Rosenberg appeared in Nature, describing the anti-proliferative properties of a very simple inorganic compound, now known to all of us as Cisplatin. This discovery, and the subsequent clinical approval of Cisplatin, has led to thousands of papers, and it has arguably initiated the field of medicinal inorganic chemistry. Now, 50 years after Rosenberg's discovery, the field has matured and, beyond Cisplatin, many other compounds have been explored for their anti-proliferative activity. Moreover, chemical creativity has shifted from the mere discovery of new active agents, and elucidation of their mode of action (as difficult as that may be at times) to issues such as delivery of anti-proliferative agents to cancer cells, activation of inorganic prodrugs, and very creative approaches to targeting malignant cells exclusively.

This Themed Issue aims to explore the frontiers in the art of medicinal inorganic chemistry. Crucially, the Issue will aim to provide an overview of current progress in three focal points of inorganic drug development: activation (for example, by light, enzymes or external stimuli), targeting (that is, bioconjugates, using the EPR effect, and so on) or selective delivery (to cancer cells or intra-cellularly, by nanoparticles or other carrier systems, and so on).

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