Article
Chemistry, Inorganic & Nuclear
Sung-Min Hyun, Kaleb A. Reid, Shaik Waseem Vali, Paul A. Lindahl, David C. Powers
Summary: This study describes a series of truncated 2-pyridylpyrrolide ligands that support mono- and binuclear Fe(II) complexes with a rare cis-divacant octahedral (CDO) geometry. These synthetic studies provide the structural basis to explore the implications of CDO geometry on Fe-catalyzed reactions.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Moonica Martinez-Junquera, Elena Lalinde, M. Teresa Moreno
Summary: The synthesis and optical properties of a series of trans- and cis-alkynyl/isocyanide cycloplatinated compounds are reported. The compounds exhibit efficient triplet emission properties and can be used for sensing Hg2+ ions in solution.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Julia A. Eremina, Ksenia S. Smirnova, Lyubov S. Klyushova, Alexey S. Berezin, Elizaveta Lider
Summary: In this study, four new mixed-ligand copper(II) complexes were synthesized and characterized. Two crystal structures of the complexes with 5-benzyltetrazole were established for the first time. The complexes were screened for cytotoxic activity against three cancer cell lines, with [Cu(phen)(L)(2)] and [Cu(dmphen)(L)(2)] showing the highest cytotoxicity.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Inorganic & Nuclear
Moonica Martinez-Junquera, Elena Lalinde, M. Teresa Moreno
Summary: The synthesis, structures, and isomerization of a series of alkynyl/isocyanide cycloplatinated compounds and their photophysical properties were studied. The sensitivity and selectivity of two pairs of cis/trans isomers towards Hg2+ were investigated. Trans/cis configuration, cyclometalated ligand, and alkynyl ligand influenced the absorption and emission properties of the complexes.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Kamila R. Enikeeva, Aliia V. Shamsieva, Airat I. Kasimov, Robert R. Fayzullin, Igor A. Litvinov, Vera V. Khrizanforova, Yulia H. Budnikova, Anna P. Lyubina, Alexandra D. Voloshina, Ilya E. Kolesnikov, Elvira I. Musina, Andrey A. Karasik
Summary: In this study, new manganese(II) complexes with Mn2Cl2 and Mn2O2 cores were synthesized and their various properties were investigated. Complex 3 with the Mn2O2 core exhibited excellent catalytic activity in hydrogen evolution reaction and high cytotoxicity against HuTu80 cancer cell line.
INORGANICA CHIMICA ACTA
(2023)
Article
Chemistry, Inorganic & Nuclear
Milyausha F. Galimova, Temurbek A. Begaliev, Ekaterina M. Zueva, Svetlana A. Kondrashova, Shamil K. Latypov, Alexey B. Dobrynin, Ilya E. Kolesnikov, Rustem R. Musin, Elvira Musina, Andrey A. Karasik
Summary: This study focuses on the synthesis, structural, and photophysical characterization of platinum dihalogenide complexes with different 10-(aryl)phenoxarsine ligands. The structures of the complexes were determined using various techniques, with the cis/trans isomerism in solution studied using NMR spectroscopy. In the solid state, platinum diiodide trans complexes exhibited intense orange-red emission under UV irradiation, which was attributed to a metal halide-centered triplet state. The UV/vis absorption and emission properties were rationalized through density functional theory (DFT) and time-dependent DFT calculations.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Applied
Rais Ahmad Khan, Amal AlFawaz, Nida N. Farshori, Anup Paul, Mohammed H. Jaafar, Ali Alsalme
Summary: Two organometallic ruthenium (II) complexes containing analogs of aminobenzimidazole were synthesized and characterized. Their binding affinity with human serum albumin and cytotoxic potential against cancer cells were evaluated. One of the complexes showed promising cytotoxic properties, indicating its potential as an anticancer therapeutic.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Alfonso Annunziata, Paola Imbimbo, Maria Elena Cucciolito, Giarita Ferraro, Vincenzo Langellotti, Alessandra Marano, Massimo Melchiorre, Gabriella Tito, Marco Trifuoggi, Daria Maria Monti, Antonello Merlino, Francesco Ruffo
Summary: This study presents new platinum(II) cationic five-coordinate complexes with different alkyl and imidazole-based NHC-carbene ligands. These complexes exhibit stability in both DMSO and aqueous solvents. Hydrophobicity studies showed their potential as anticancer drugs, as they were internalized in cancer cells and induced apoptosis. Reactivity studies revealed the compound's ability to bind with DNA and interact with model protein lysozyme, maintaining its five-coordinate geometry.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Inorganic & Nuclear
Nikolai F. Romashev, Pavel A. Abramov, Ivan Bakaev, Iakov S. Fomenko, Denis G. Samsonenko, Alexander S. Novikov, Kelvin K. H. Tong, Dohyun Ahn, Pavel Dorovatovskii, Yan Zubavichus, Aleksey A. Ryadun, Olga A. Patutina, Maxim N. Sokolov, Maria Babak, Artem L. Gushchin
Summary: A series of Pt and Pd complexes with dpp-Bian and different ligands were synthesized and characterized. The Pt(dpp-Bian) complexes showed high anticancer activity at low concentrations and exhibited selectivity towards cancer cells. These complexes induced the generation of reactive oxygen species in cancer cells and were able to intercalate into DNA.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Applied
Aisha A. Al-abbasi, Mohamed Ibrahim Mohamed Tahir, Safa Faris Kayed, Mohammad B. Kassim
Summary: A series of oxovanadium (IV) complexes were synthesized and characterized. The crystal structure of [Tp*VOL3] was determined, showing good oxidation properties. The complexes exhibited moderate antimicrobial activity and showed cytotoxicity against human hepatocellular carcinoma cells (HepG2).
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Priyabrata Bhattacharya, Riya Bag, Soumya Satpathi, Swapan K. Pati, Ray J. Butcher, Jinkui Tang, Sanchita Goswami
Summary: The purpose of this study is to synthesize a series of Ln(2)(III) complexes that can be used to construct functional magnetic materials. The Dy-2(III) complex exhibits slow relaxation of magnetization behavior.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Inorganic & Nuclear
Dai Oyama, Takatoshi Kanno, Tsugiko Takase
Summary: This study successfully synthesized ruthenium complexes containing both hydroquinone and quinone units, which allowed for the isolation and characterization of their reduced and oxidized forms. The properties of the complexes were compared, and synergistic effects between metal complexes and redox-active organic compounds were demonstrated through electron transfer and photoirradiation-induced quinone/hydroquinone interconversion.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Kamila R. Enikeeva, Aliia Shamsieva, Airat I. Kasimov, Igor A. Litvinov, Anna P. Lyubina, Alexandra D. Voloshina, Elvira I. Musina, Andrey A. Karasik
Summary: Water-soluble copper(II) complexes based on novel phosphorylpyridines, diethyl(pyridin-2-yl) phosphine oxide (3) and diisopropyl(pyridin-2-yl)phosphine oxide (4), were synthesized and their molecular and crystal structures were determined by X-ray analysis. The cytotoxicity of the ligands and complexes against M-HeLa and HuTu80 cancer cell lines as well as Chang liver normal cell lines was evaluated.
INORGANICA CHIMICA ACTA
(2023)
Article
Chemistry, Inorganic & Nuclear
Magnus R. Buchner, Matthias Mueller
Summary: Ethylenediamine's suitability as an alternative solvent in beryllium chemistry was evaluated through reactions with various beryllium compounds and analysis through spectroscopy. The anions were found to significantly influence solubility and the species present, while ethylenediamine can act as different types of ligands or crystal solvents.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Atsushi Takamori, Kazuhiro Uemura
Summary: Paramagnetic trinuclear complexes with straight metal-metal bonds were successfully synthesized and characterized. The dimerized structures were maintained in the solvent, and showed two-step oxidation and reduction in cyclic voltammograms.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Valentin Fuchs, Klaudia Cseh, Michaela Hejl, Petra Vician, Benjamin Neuditschko, Samuel M. Meier-Menches, Lukas Janker, Andrea Bileck, Natalie Gajic, Julia Kronberger, Martin Schaier, Sophie Neumayer, Gunda Koellensperger, Christopher Gerner, Walter Berger, Michael A. Jakupec, Michael S. Malarek, Bernhard K. Keppler
Summary: A series of highly lipophilic Cp-substituted molybdenocenes with different bioactive chelating ligands were synthesized and characterized. They showed significantly increased cytotoxic potency compared to non-Cp-substituted counterparts. In vivo experiments demonstrated tumor growth inhibition for the most active complex containing the thioflavone ligand, along with significant regulation of tubulin-associated and mitochondrial inner membrane proteins.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Analytical
Olga V. Kuznetsova, Bernhard K. Keppler, Andrei R. Timerbaev
Summary: This study developed a unified protocol for the preparation of seawater samples for ICP-MS analysis of nanoparticles, which involved acidification and ultrafiltration to stabilize the particles and facilitate metal analysis. High-resolution ICP-MS method was used to achieve very low limits of detection.
Article
Pharmacology & Pharmacy
Janos P. Meszaros, Wolfgang Kandioller, Gabriella Spengler, Alexander Prado-Roller, Bernhard K. Keppler, Eva A. Enyedy
Summary: This study introduces half-sandwich Rh complexes that can be activated in the acidic, extracellular pH of tumor tissue, reducing the side effects and improving the efficacy of chemotherapy.
Correction
Pharmacology & Pharmacy
M. S. Galanski, V. B. Arion, M. A. Jakupec, B. K. Keppler
CURRENT PHARMACEUTICAL DESIGN
(2023)
Article
Pharmacology & Pharmacy
Yvonne Lerchbammer-Kreith, Nadine S. Sommerfeld, Klaudia Cseh, Xian Weng-Jiang, Uchechukwu Odunze, Andreas G. Schaetzlein, Ijeoma F. Uchegbu, Mathea S. Galanski, Michael A. Jakupec, Bernhard K. Keppler
Summary: A new class of anticancer prodrugs was developed by combining platinum(IV) complexes with glycol chitosan polymers as drug carriers. The platinum(IV) complexes were synthesized and conjugated with degraded glycol chitosan (dGC) polymers of different chain lengths. These conjugates exhibited higher cytotoxicity and antiproliferative activity in cancer cell lines compared to platinum(IV) counterparts. In particular, a cisplatin(IV)-dGC conjugate showed the highest cytotoxicity, being 33 times more potent than the corresponding platinum(IV) complex and twice as potent as cisplatin. Biodistribution studies of an oxaliplatin(IV)-dGC conjugate also showed increased accumulation in the lung, suggesting potential for further activity studies.
Article
Pharmacology & Pharmacy
Yvonne Lerchbammer-Kreith, Michaela Hejl, Petra Vician, Michael A. Jakupec, Walter Berger, Mathea S. Galanski, Bernhard K. Keppler
Summary: Based on their drug delivery properties and activity against tumors, PAMAM dendrimers were combined with platinum(IV) complexes to improve anticancer treatment. The conjugates showed faster reduction behavior compared to the platinum(IV) complexes and exhibited significantly increased cytotoxic activity in human cell lines. In vivo experiments demonstrated tumor growth inhibition and prolonged animal survival.
Article
Pharmacology & Pharmacy
Theresa Mendrina, Isabella Poetsch, Hemma Schueffl, Dina Baier, Christine Pirker, Alexander Ries, Bernhard K. K. Keppler, Christian R. R. Kowol, Dan Gibson, Michael Grusch, Walter Berger, Petra Heffeter
Summary: Platinum compounds are effective treatment options for various cancer types, but their use is limited by side effects and drug resistance. A new multi-targeted platinum(IV) prodrug, cisPt(PhB)(2), has shown promising anticancer activity and the ability to overcome drug resistance mechanisms. The drug's mode of action is influenced by cellular fatty acid metabolism and mitochondrial activity. Specifically, it is more effective against cisplatin-resistant cancer cells with Warburg-like properties. This orally applicable prodrug has the potential to improve cancer treatment outcomes.
Article
Chemistry, Multidisciplinary
Alexander Kastner, Hemma Schueffl, Patrick A. Yassemipour, Bernhard K. Keppler, Petra Heffeter, Christian R. Kowol
Summary: Platinum(IV) prodrugs are promising alternatives to platinum(II) anticancer therapeutics. This study investigated the reactivity and synthetic usability of a platinum(IV) complex with hydrolyzable equatorial ligands, and successfully synthesized stable platinum(IV) complexes suitable for long-circulating tumor-targeting strategies. Additionally, platinum(IV) complexes with equatorial maleimides were synthesized, showing prolonged plasma half-life and improved anticancer activity compared to oxaliplatin.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Correction
Oncology
Mathea Sophia Galanski, Bernhard K. K. Keppler
ANTI-CANCER AGENTS IN MEDICINAL CHEMISTRY
(2023)
Article
Oncology
Monika Caban, Bettina Koblmueller, Diana Groza, Hemma H. Schueffl, Alessio Terenzi, Alexander Tolios, Thomas Mohr, Marlene Mathuber, Kushtrim Kryeziu, Carola Jaunecker, Christine Pirker, Bernhard K. Keppler, Walter Berger, Christian R. Kowol, Petra Heffeter
Summary: Through chemical modifications, KP2187 has similar activity and action as other clinically used EGFR inhibitors, without interfering with EGFR binding. In vitro and in vivo experiments have shown that KP2187 can significantly inhibit tumor cell proliferation and activate the EGFR signaling pathway. Moreover, KP2187 has a high synergistic effect with VEGFR inhibitors, indicating its potential as a hypoxia-activated prodrug.
Correction
Biochemistry & Molecular Biology
Mathea Sophia Galanski, Michael A. Jakupec, Bernhard K. Keppler
CURRENT MEDICINAL CHEMISTRY
(2023)
Article
Chemistry, Medicinal
Xiao Liu, Dominik Wenisch, Philipp Dahlke, Paul M. Jordan, Michael A. Jakupec, Christian R. Kowol, Phil Liebing, Oliver Werz, Bernhard K. Keppler, Wolfgang Weigand
Summary: In recent decades, the close connection between inflammation and cancer has been recognized, leading to extensive studies on joint strategies involving chemotherapeutic and anti-inflammatory agents. In this study, novel Pt(IV) complexes based on cisplatin and oxaliplatin were synthesized, incorporating non-steroidal anti-inflammatory drugs (NSAIDs) and their carboxyl ester analogues. Certain cisplatin-based Pt(IV) complexes 22-30 exhibited increased cytotoxicity in human cancer cell lines compared to the Pt(II) drug. Complex 26, containing two aceclofenac moieties, displayed potent anticancer effects combined with anti-inflammatory properties.
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Article
Pharmacology & Pharmacy
Klaudia Cseh, Iker Berasaluce, Valentin Fuchs, Alexandra Banc, Andreas Schweikert, Alexander Prado-Roller, Michaela Hejl, Debora Wernitznig, Gunda Koellensperger, Michael A. Jakupec, Wolfgang Kandioller, Michael S. Malarek, Bernhard K. Keppler
Summary: This paper describes the synthesis, characterization and biological activity of tungstenocenes with different biologically active chelates, such as (O,O-), (S,O-) and (N,O-). The complexes were analyzed using various techniques, including NMR, mass spectrometry, spectroscopy and X-ray diffraction. Their stability, electrochemical behavior, cytotoxicity and mode of action were investigated. The results showed that complexes containing (S,O-) chelates exhibited higher activity than those with (O,O-) and (N,O-) chelates. Notably, two complexes with a W-S or W-O bond showed different distribution patterns and strong inhibitory effects in tumor spheroid models.
Article
Biochemistry & Molecular Biology
Martin Schaier, Enrico Falcone, Tomas Prstek, Bertrand Vileno, Sonja Hager, Bernhard K. Keppler, Petra Heffeter, Gunda Koellensperger, Peter Faller, Christian R. Kowol
Summary: Thiosemicarbazones (TSCs) are biologically active compounds that have potential anticancer activity by chelating iron and targeting ribonucleotide reductase. Recent findings suggest that the stability and reduction properties of copper complexes are essential for the action of specific TSC derivatives. This study investigated the interaction between TSCs and human serum albumin (HSA) as a potential source of copper, and found that TSCs specifically chelate copper from HSA and form ternary HSA conjugates.
Article
Biochemistry & Molecular Biology
Michael Ramek, Jasmina Sabolovic
Summary: This paper investigates the geometries, energy landscapes, and magnetic parameters of copper(II) amino acid compounds using density functional theory calculations. The results show that certain conformers with histaminate-like and glycine-like modes have low Gibbs free energies and high metal-binding affinities. The predicted conformations reproduce the experimental electron paramagnetic resonance parameters.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2024)
Article
Biochemistry & Molecular Biology
Wei Tian, Wen Zhong, Zengyan Yang, Ling Chen, Shijie Lin, Yanping Li, Yuxing Wang, Peilin Yang, Xing Long
Summary: A series of novel dibutyltin complexes based on salen-like ligands were synthesized and characterized. Complex S03 showed excellent in vitro anticancer activity and induced cancer cell death through multiple mechanisms. This study reveals new mechanisms of organotin complexes and provides new insights into the development of organotin metal complexes as anticancer drugs.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2024)
Article
Biochemistry & Molecular Biology
Natalie C. Korkola, Martin J. Stillman
Summary: Many proteins require a metal cofactor for their function, and these metals play a role in protein folding. The study found that the metallation rates of different metal binding pathways are influenced by pH, with the less cooperative pathway being more affected by low pH conditions. Specific mixtures of structures are formed in the initial steps of metallation, and unfolding the disordered apo-MT structure hinders the formation of these preliminary structures. The compact conformation of the native apo-MT allows for rapid formation of metal-thiolate structures with high affinity, providing protection from oxidation.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2024)
Article
Biochemistry & Molecular Biology
Boxuan Yang, Xitong Song, Binju Wang
Summary: The diiron active site plays a crucial role in catalytic transformations in both biological and chemical systems. Recent advancements in the field include the synthesis of biomimetic diiron catalysts inspired by the active structure of soluble methane monooxygenase (sMMO), which have been successfully applied to the dehydrogenation of indolines.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2024)
Article
Biochemistry & Molecular Biology
Christina N. Banti, Angeliki A. Piperoudi, Catherine P. Raptopoulou, Vassilis Psycharis, Constantinos M. Athanassopoulos, Sotiris K. Hadjikakou
Summary: Two copper(I) polymorphs with mitochondria-targeting properties were successfully prepared via metal ion conjugation. These compounds showed promising activities in DNA binding, enzyme inhibition, and cancer cell inhibition. The molecular mechanisms of action were investigated.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2024)