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Angélique Kergreis et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 26(65), 14938-14946 (2020-06-11)
A series of cyclometallated mono- and di-nuclear platinum(II) complexes and the parent organic ligand, 2,6-diphenylpyridine 1 (HC^N^CH), have been synthesized and characterized. This library of compounds includes [(C^N^C)PtII (L)] (L=dimethylsulfoxide (DMSO) 2 and triphenylphosphine (PPh3 ) 3) and [((C^N^C)PtII )2
Lina Saker et al.
International journal of molecular sciences, 19(7) (2018-07-05)
It is suggested that several compounds, including G-quadruplex ligands, can target telomeres, inducing their uncapping and, ultimately, cell death. However, it has never been demonstrated whether such ligands can bind directly and quantitatively to telomeres. Here, we employed the property
Wenyao Chen et al.
ChemSusChem, 8(17), 2927-2931 (2015-06-11)
We report remarkable support effects for carbon nanotubes (CNTs) in the Pt/CNT-catalyzed hydrolytic dehydrogenation of ammonia borane. The origin of the support-dependent activity and durability is elucidated by combining the catalytic and durability testing with characterization by a range of
Ryozo Shibuya et al.
Angewandte Chemie (International ed. in English), 53(17), 4377-4381 (2014-03-08)
A dual platinum- and pyrrolidine-catalyzed direct allylic alkylation of allylic alcohols with various active methylene compounds to produce products with high monoallylation selectivity was developed. The use of pyrrolidine and acetic acid was essential, not only for preventing undesirable side
Amparo Alvarez-Valdes et al.
Journal of inorganic biochemistry, 191, 112-118 (2018-11-30)
Novel bisphosphonate platinum complexes: [Pt(isopropylamine)2(BP)]NO3 (BP = pamidronate and alendronate) have been synthesized and characterized. Their monomeric structure contains a bisphosphonate acting as chelate ligand through its oxygen atom donors, conferring the compound's cationic structure with a good solubility in water. The
Line V Hjelle et al.
Anticancer research, 35(3), 1619-1625 (2015-03-10)
Evaluation of long-term platinum (Pt) retention in testicular cancer survivors (TCSs) treated with platinum-based chemotherapy to elucidate possible mechanisms of developing late effects. 458 TCSs treated 1980-1994 participated in a national follow-up study (2007-2008). Four treatment groups were evaluated for
Vlastimil Masek et al.
Biomedical papers of the Medical Faculty of the University Palacky, Olomouc, Czechoslovakia, 159(3), 382-387 (2014-07-10)
We studied the interaction of oxaliplatin derivatives involving cytotoxic adenine-based cyclin-dependent kinase inhibitors, with human liver microsomal cytochrome P450. The activities of 9 human liver microsomal CYP forms (CYPs 1A2, 7-ethoxyresorufin O-deethylation; 2A6, coumarin 7-hydroxylation; 2B6, 7-ethoxy-4-(trifluoromethyl) coumarin O-deethylation; 2C8
Christian Boehler et al.
ACS applied materials & interfaces, 9(1), 189-197 (2016-12-13)
Conducting polymers (CPs) have frequently been described as outstanding coating materials for neural microelectrodes, providing significantly reduced impedance or higher charge injection compared to pure metals. Usability has until now, however, been limited by poor adhesion of polymers like poly(3,4-ethylenedioxythiophene)
C Boehler et al.
Biomaterials, 67, 346-353 (2015-08-04)
Micro-sized electrodes are essential for highly sensitive communication at the neural interface with superior spatial resolution. However, such small electrodes inevitably suffer from high electrical impedance and thus high levels of thermal noise deteriorating the signal to noise ratio. In
Jian Li et al.
Nanomedicine : nanotechnology, biology, and medicine, 10(7), 1465-1475 (2014-02-04)
Carbon nanotubes (CNTs) are promising drug delivery systems due to their external functionalizable surface and their hollowed cavity that can encapsulate several bioactive molecules. In this study, the chemotherapeutic drug cisplatin or an inert platinum(IV) complex were entrapped inside functionalized-multi-walled-CNTs
Bishnu Das et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 26(65), 14987-14995 (2020-08-28)
In this study we have analysed the comparative photophysical and electrochemical properties of two isomeric heterotrinuclear PtII -IrIII -PtII complexes 3 and 6 and the four corresponding intermediate isomeric homonuclear cyclometalated iridium(III) complexes 1, 2, 4 and 5. The isomerisation
Eugenii U Donev et al.
Nano letters, 9(7), 2715-2718 (2009-07-09)
We demonstrate here the first focused electron-beam-induced deposition (EBID) of nanostructures using a liquid precursor. We have deposited sub-50 nm platinum (Pt) wires and dots from a dilute, aqueous solution of chloroplatinic acid. Existing EBID processes rely on the electron-beam
Gabriela C Mauruto de Oliveira et al.
Biosensors & bioelectronics, 152, 112016-112016 (2020-02-15)
In this study, platinum electrodes were fabricated on the bio-based poly(ethylene terephthalate) (Bio-PET) substrates for the development of flexible electrochemical sensors for the detection of Parkinson's disease biomarkers. Dopamine was detected by voltammetric measurements, displaying a 3.5 × 10-5 mol L-1 to 8.0 × 10-4 mol L-1 linear
Kyle M Kovach et al.
Journal of neuroscience methods, 273, 1-9 (2016-10-25)
It is currently unclear how the platinum (Pt) species released from platinum-containing stimulating electrodes may affect the health of the surrounding tissue. This study develops an effective system to assess the cytotoxicity of any electrode-liberated Pt over a short duration
J H Erasmus et al.
The Science of the total environment, 703, 134738-134738 (2019-11-16)
South Africa is the world's main supplier of Pt. The Bushveld Igneous Complex in South Africa contains 75% of the world's Pt resources. Mining of this precious metal requires large volumes of water for production and removal of waste products.
Ching-Ju Monica Chin et al.
Journal of hazardous materials, 277, 110-119 (2014-03-25)
This study investigated applications of the electrochemical anodic oxidation process with Pt-FTO and Pt/MWCNTs-FTO glasses as anodes on the treatment of one of the most important emerging contaminants, naproxen. The anodes used in this study have been synthesized using commercial
Noora Tujunen et al.
Materials science & engineering. C, Materials for biological applications, 55, 70-78 (2015-06-29)
Hydrogen peroxide is the product of various enzymatic reactions, and is thus typically utilized as the analyte in biosensors. However, its detection with conventional materials, such as noble metals or glassy carbon, is often hindered by slow kinetics and biofouling
Fausto Petrelli et al.
Lung cancer (Amsterdam, Netherlands), 81(3), 337-342 (2013-07-31)
The sole agents pemetrexed (PEM), docetaxel and anti-EGFR agents are approved second-line therapies for non-small cell lung cancer (NSCLC) after failure with cisplatin-based doublets. The potential usefulness of platinum-based doublets as rechallenge for second-line chemotherapy has not yet been established.
Mariafrancesca Hyeraci et al.
Molecules (Basel, Switzerland), 27(3) (2022-02-16)
The high incidence of the resistance phenomenon represents one of the most important limitations to the clinical usefulness of cisplatin as an anticancer drug. Notwithstanding the considerable efforts to solve this problem, the circumvention of cisplatin resistance remains a challenge
Maria Carolina Ruiz et al.
Cancer chemotherapy and pharmacology, 83(4), 681-692 (2019-01-21)
Platinum-based drugs, mainly cisplatin, are used for the treatment of several solid tumors such as OS. However, cisplatin treatment often results in the development of chemoresistance, leading therapeutic failure. We have previously reported that platinum complexes containing 8-hydroxyquinoline ligands have
Shruthi Sriramkumar et al.
Journal of translational medicine, 20(1), 246-246 (2022-06-02)
Platinum based agents-cisplatin and carboplatin in combination with taxanes are used for the treatment of ovarian cancer (OC) patients. However, the majority of OC patients develop recurrent, platinum resistant disease that is uniformly fatal. Platinum treatment enriches for chemoresistant aldehyde
Maggy F Lengke et al.
Langmuir : the ACS journal of surfaces and colloids, 22(17), 7318-7323 (2006-08-09)
Interaction of cyanobacteria (Plectonema boryanum UTEX 485) with aqueous platinum(IV)-chloride (PtCl(4) degrees ) has been investigated at 25-100 degrees C for up to 28 days, and 180 degrees C for 1 day. The addition of PtCl(4) degrees to the cyanobacteria
Joseph F Fowler et al.
Dermatitis : contact, atopic, occupational, drug, 19(3), 146-147 (2008-07-17)
Although contact allergy to some metals is common, patch testing for allergy to platinum is rarely performed. To determine the prevalence of positive patch-test reactions to platinum in an unselected consecutive group of patients presenting for diagnostic patch testing. Unselected
R D Murdoch et al.
International archives of allergy and applied immunology, 77(4), 456-458 (1985-01-01)
Hooded Lister rats were sensitised to the halide salt of platinum ammonium tetrachloroplatinate(II)[(NH4)2PtCl4] in its conjugated form with ovalbumin. Sensitisation was achieved by intraperitoneal injection with Bordetella pertussis vaccine as adjuvant, followed 21 days later by a further injection in
Elodie Morel et al.
Molecules (Basel, Switzerland), 24(3) (2019-01-27)
Guanine-rich DNA can form four-stranded structures called G-quadruplexes (G4s) that can regulate many biological processes. Metal complexes have shown high affinity and selectivity toward the quadruplex structure. Here, we report the comparison of a panel of platinum (II) complexes for
Hazem Khamaisi et al.
Molecules (Basel, Switzerland), 27(3) (2022-02-16)
Ovarian cancer (OC) is the second most common type of gynecological malignancy. Platinum (Pt)-based chemotherapy is the standard of care for OC, but toxicity and acquired chemoresistance has proven challenging. Recently, we reported that sensitivity to platinum was significantly reduced
Ana M Pizarro et al.
ChemMedChem, 9(6), 1169-1175 (2014-05-21)
The lipophilicity of ten photoactivatable platinum(IV) diazido prodrugs of formula trans,trans,trans-[Pt(N3 )2 (OH)2 (R)(R')] (where R and R' are NH3 , methylamine, ethylamine, pyridine, 2-picoline, 3-picoline or thiazole) has been determined by their retention times on reversed-phase HPLC. The lipophilicity
Ming Zhang et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 21(10), 3937-3941 (2015-01-22)
An increased supply of scarce or inaccessible natural products is essential for the development of more sophisticated pharmaceutical agents and biological tools, and thus the development of atom-economical, step-economical and scalable processes to access these natural products is in high
Takashi Soejima et al.
Biotechnology and bioengineering, 113(2), 301-310 (2015-07-21)
PCR cannot distinguish live microorganisms from dead ones. To circumvent this disadvantage, ethidium/propidium-monoazide (EMA/PMA) and psoralen to discriminate live from dead bacteria have been used for 2 decades. These methods require the use of numerous laborious procedures. We introduce an
Oana Buriac et al.
Molecules (Basel, Switzerland), 25(16) (2020-08-23)
Platinum is a precious metal with many applications, such as: catalytic converters, laboratory equipment, electrical contacts and electrodes, digital thermometers, dentistry, and jewellery. Due to its broad usage, it is essential to recover it from waste solutions resulted out of
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