Download or read book The Development of Trackable Polynuclear Platinum II Compounds for Targeted Anticancer Applications written by Sinéad O'Carroll and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, there has been major interest in the design and development of therapeutic polynuclear platinum(II) complexes (PPCs). The potential use for these complexes has been epitomised by BBR3464-a trinuclear platinum(II) complex featuring trans geometry with platinum(II) centres separated by 1,6hexanediamine linkers and terminal trans labile chloride ligands-which was the first and only platinum(II) drug to enter clinical trials not based on the conventional mononuclear cis-chemotype. While this drug class has excellent therapeutic potential, issues regarding off-target toxicity cannot be overlooked. This thesis presents the synthesis, characterisation, cytotoxic analyses, and DNA binding studies of a novel azide-appended polynuclear platinum(II) complex series (N3 -PPCs). These agents feature fully trans-symmetric geometry, vary in nuclearity, and contain a terminal azide to enable biological tracking. Furthermore, although each platinum(II) centre is separated by a 1,6hexanediamine linker similar to BBR3464, this series lack a labile chloride ligand and bind with DNA through a non-covalent mechanism called the phosphate clamp. The stand-out complex in this series, N3 -TriplatinNC, has demonstrated excellent anticancer properties in-vitro in MDA-MB-231 triple negative breast cancer cells and displays impressive in-vivo tumour regression in mice bearing MDA-MB-231 xenografts. Click chemistry labelling studies were conducted to investigate the cellular localisation and accumulation properties of the N3 -PPC series in MDA-MB-231 triple negative breast cancer cell lines. This method of post-exposure 'click' modification facilitates accurate detection of the localisation and accumulation properties of the native drug alone. Finally, azide-appended PPCs were functionalised with a thiazole orange (TO) reporter molecule to create the N3 -TO-PPC series. These TO-appended N3 -PPCs were studied for their DNA binding properties and results were compared to the aforementioned N3 -PPCs and earlier reported PPCs. Future work on the TO appended PPCs entails cellular tracking within MDA-MB-231 cell lines and compared to non-TO modified congeners.

Download or read book Platinum and Other Heavy Metal Compounds in Cancer Chemotherapy written by Andrea Bonetti and published by Springer Science & Business Media. This book was released on 2009-01-09 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cisplatin, the first member of the family of platinum-containing chemotherapeutic agents, was discovered by Barnett Rosenberg in 1965 and approved by the FDA for marketing in 1978. After 30 years of use in the clinic, cisplatin remains a central element of many treatment regimens. Cisplatin is still an irreplaceable component of a regimen that produces high cure rates in even advanced nonseminomatous germ-cell cancers, and is widely used in the treatment of ovarian cancers and other gynecologic cancers, head and neck, and numerous other tumor types. The development of carboplatin has reduced some of the adverse events associated with cisplatin treatment, and the introduction of the DACH platinum compound oxaliplatin has broadened the spectrum of activity of the platinums to include gastro-intestinal cancers, especially colorectal cancer. The clinical importance of this family of drugs continues to drive investigation into how these drugs work and how to improve their efficacy and reduce their toxicity. The papers in this volume were presented in Verona, Italy, during the tenth International Symposium on Platinum Coordination Compounds in Cancer Chemotherapy. The symposium was jointly organized by the Department of Oncology of the Mater Salutis Hospital – Azienda Sanitaria Locale 21 of the Veneto Region – and by the Department of Medicine and Public Health, Section of Pharmacology, the University of Verona. They reflect the vitality of this field and the increasing use of new molecular and cell biologic, genetic, and biochemical tools to identify approaches to further improve their use.

Download or read book Development of Non traditional Platinum Anticancer Agents written by Daniel E. Lee and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Platinum anticancer compounds with cis geometry, similar to cisplatin, have been explored to circumvent the cisplatin resistance; however, they were not considered broadly active in cisplatin cells due to exhibiting similar or same cell death mechanism as cisplatin. Platinum compounds with trans geometry were less studied due to transplatin being clinically inactive; but with few structural modifications, they resulted in unaffected cytotoxic activities in cisplatin resistant cells with structural modification by exhibiting different modes of DNA binding. This research focused on further exploring and establishing structure-activity relationship of two promising non-classical series of platinum compounds with trans-geometry: trans-platinum planar amine (TPA) compounds and noncovalently binding polynuclear platinum compounds (PPC-NC). During this research, further optimizations of the reactivity of TPA compounds were accomplished by modifying the leaving carboxylate groups. The effects of modified reactivity were probed by a systematic combination of chemical and biophysical assays, followed by evaluating their biological effects in cells. To establish the structural-activity relationship of PPC-NCs, Mono-, Di-, Tri-, and Tetraplatin NC with charge of 4+, 6+, 8+, and 10+ were synthesized and evaluated by utilizing biophysical and biological assays. Lastly, a new class of polynuclear platinum compounds, Hybrid-PPCs, were synthesized and evaluated to overcome the pharmacokinetic problems of BBR3464, phase II clinical trial anticancer drug developed previously in our laboratory.

Download or read book Platinum Coordination Complexes in Cancer Chemotherapy written by T.A. Connors and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: It was a great pleasure and honour to have been invited to attend this Seminar and to present a final impression. The association in this field between the Chester Beatty Research Institute and Dr. Rosenberg's School at East Lansing is something which I specially value and many would doubtless like to know how it came about. In the course of its work in carcinogenesis and on chemotherapy over many years, the Chester Beatty Research Institute was frequently drawn to the importance of many metals - as for example lead, iron, metalloid arsenic and the metalloid quali ties of the carcinogenic hydrocarbons. Interest started in platinum many years ago, following the possibility, c1aimed by others, that various complexes between the metal and mercaptopurine might possess significant chemotherapeutic properties. Va rious attempts to confirm such findings ended, however, in complete failure. Interest in platinum was revived by the fresh observations of Dr. Rosenberg and his collea gues, and here the outcome was entirely different. Very soon it was possible to con firm the intense growth-inhibitory properties of cis-platinum (II) diamminedi chloride and related substances. After communicating these results to Dr. Rosenberg, it was a pleasure to welcome hirn in London where he gave a Seminar which greatly engaged the interest of many of the staff. Later, several of these were to enjoy Dr. Rosenberg's hospitality at an international conference on the subject to be held in East Lansing, where many rapidly developing aspects were open for discussion.

Download or read book Developments in the Chemistry and Nanodelivery of Platinum Anticancer Agents written by Timothy Charles Johnstone and published by . This book was released on 2014 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approximately half of all patients receiving cancer chemotherapy are treated with a platinum-containing drug. Despite this intense clinical use, only three platinum complexes, cisplatin, carboplatin, and oxaliplatin, are approved by the United States Food and Drug Administration for the treatment of cancer. A number of side effects accompany platinum-based therapy and novel approaches are under investigation to attenuate these negative effects and circumvent tumor resistance, be it inherent or acquired. One approach is to use non-classical platinum agents such as platinum(IV) prodrugs and monofunctional platinum(II) complexes. The latter, unlike the classical platinum drugs, can only form one bond to the biological target, DNA. Another strategy is to exploit the advantages offered by nanodelivery. The work presented here spans a range of topics aimed at furthering the development of platinum anticancer therapy along these lines. Fundamental platinum chemistry has been explored to provide ready access to platinum(II) starting materials such as oxaliplatin and mixed ammine/amine platinum(II) complexes. Novel platinum(IV) architectures were uncovered while investigating the oxidative halogenation of cisplatin and carboplatin. Nanoparticle constructs based on the biocompatible amphiphilic block copolymer, PLGA-PEG, have been devised that are capable of delivering both hydrophobic and hydrophilic platinum complexes. Nanoparticle encapsulation has a significant effect on the in vivo properties of the platinum(IV) prodrug mitaplatin. Fundamental studies of the chirality of a potent monofunctional complex, phenanthriplatin, revealed aspects of its interaction with derivatives of the nucleobase guanine, that may have a significant effect on the cellular processing of the DNA adducts formed by this compound. Finally, nanoparticle delivery was used to enhance the ability of phenanthriplatin and phenanthriplatin prodrugs to inhibit the growth of tumors in mice.

Download or read book Anti Cancer Activity of Platinum Complexes written by Shiju C and published by LAP Lambert Academic Publishing. This book was released on 2011-10 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some of the platinum complexes such as Cisplatin, carboplatin, and oxaliplatin are the FDA-approved members of the platinum anticancer drug family. Cisplatin, as one of the leading metal-based drugs, is widely used in the treatment of cancer. Significant side effects and drug resistance, however, have limited its clinical applications. These compounds induce apoptosis in tumor cells by binding to nuclear DNA, forming a variety of structural adducts and triggering cellular responses. Advances in biocoordination chemistry are crucial for improving the design of compounds to reduce toxic side effects and understand their mechanisms of action. In this report we present the development of platinum complexes such as platinum(II)-amine complexes, platinum(IV)-amine complexes, multi nuclear platinum complexes and some other platinum complexes as anti-cancer agents, with the purpose of providing an insight into the benefits of, and reasons for, their success.

Download or read book The Development of Mononuclear Platinum Hybrid Biomaterials for Antigene Therapeutic Application written by Joseph Hennessy and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the serendipitous discovery of cisplatin by Rosenberg platinum agents based on the traditional cis chemotype are still the cornerstone of platinum therapeutic application with cisplatin, carboplatin and oxaliplatin as the only agents approved globally for use. Past research has focused mainly on elucidating the mechanistic action of these traditional Pt(II) agents with great success and streamed into efforts centred on trying to reduce the potent toxic side-effects such as nephrotoxicity, ototoxicity and poor target selectivity. Classes of platinum complexes such as trans-substituted platinum(II) agents, platinum(IV) prodrugs, polynuclear platinum(II) complexes and in particular, platinum(II)-DNA hybrids produced for an antigene strategy, have all observed a significant renewal of interest in recent years. This thesis focuses on the development of a library of platinum(II)-triplex forming oligonucleotide hybrids that possess targeted antigene applications. Firstly, the synthesis of azide-functionalised ligands and their complexation with platinum to form azide-functionalised cis-platinum(II) complexes is reported. Thereafter, the design and synthesis of triplex forming oligonucleotides (TFOs) is reported and followed by the utilisation of the copper-catalysed and strain promoted alkyneazide cycloaddition or 'click chemistry' to generate gene-directed cis-platinum(II)TFO hybrids. The work reported represents the first example of click chemistry strategies being employed to afford cis-platinum(II)-TFO constructs designed this way. DNA interaction studies identified that the azide-functionalised platinum(II) complexes retain activity against dsDNA targets. The cis-platinum(II)-TFO constructs demonstrated sequence specific triplex recognition with no off-target effects observed in the presence of purine rich sequences. However, in general the crosslink formation on target genes of interest by the platinum(II) ion destabilises triplex formation. The introduction of TO - a known intercalating fluorophore - can remediate this destabilisation and this work demonstrates how TO-modified cis-Pt(II)-TFOs retain their targeting abilities with enhanced stabilising characteristics. Finally, TFO constructs containing a novel alkyne-amine nucleobase were developed and investigated for their ability to incorporate TO and Pt(II). This strategy was developed to enhance site-specific metal ion-DNA target interactions whereby the proximity of the complex to the DNA interface was enhanced under the guidance of the neighbouring TO intercalator. The conjugation of Cu(II)-phenanthrene-type scaffolds with alkyne-modifed TFOs to generate novel Cu(II)-AMN-TFOs has afforded unique stabilising properties and represent an innovative class of gene-targeted system.

Download or read book The Study of the Coordination Chemistry of Platinum II to Develop Anticancer Agents written by Julie Vidalis and published by . This book was released on 2004 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Novel Strategies for Improving the Pharmacological Properties of Platinum acridine Anticancer Agents written by Song Ding and published by . This book was released on 2015 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlike traditional cisplatin-type platinum-based anticancer drugs, platinum-acridine hybrid agents were designed as dual platinating/intercalating DNA-targeted cytotoxics, which are able to cause cancer cell death at low-nanomolar concentrations. Unfortunately, the preclinical development of these agents has been hampered by their severe systemic toxicity. The goal of this dissertation was to devise strategies that improve the drug-like properties of platinum-acridines and allow their safe delivery. To achieve this, several classical and newly developed synthetic methodologies have been used to generate functionally unique hybrid agents. Several model systems, whole-cell assays, and animal studies have been used in this dissertation to validate their design and demonstrate their utility as anticancer agents. A modular screening platform was developed, based on a platinum-mediated amine-to-nitrile addition reaction, for rapid identification of functionalized platinum-acridine agents. These pre-screening assays produced functionalized "warheads" while providing insight into structure–activity relationships (SAR). Using several library members, we set out to explore synthetic approaches to construct platinum-acridine-based conjugates. A chemically robust azide-modified platinum-acridine was selected to validate the feasibility of copper-mediated and copper-free click chemistry as platinum-compatible conjugation reactions. This chemistry was used to attach fluorescent molecules to detect platinum-acridines in cancer cells by confocal microscopy. Both fluorophore tagging prior to incubation with cells and post-labeling methods were explored. In addition, a hydroxyl-modified warhead was conjugated with endoxifen via a chemically stable carbamate bond to produce a highly active hybrid agent in estrogen receptor positive (ER+) breast cancer. In another study, lipophilic ester-based prodrugs of platinum–acridines were generated showing improved drug-like properties (e. g., partition coefficients, logD). Two distinct pathways by which the target compounds can be activated have been confirmed by LC-ESMS and/or NMR techniques: (i) a platinum-assisted, self-immolative ester cleavage in a low-chloride environment, and (ii) enzymatic cleavage by human carboxylesterase-2 (hCES-2). Highly efficient amide coupling reactions in platinum complexes were also developed. This modular approach can be used to assemble a diverse library of platinum-acridines containing other bioactive components, such as molecularly targeted therapies, targeted ligands, and chemosensitizers. Finally, liposomal encapsulation of platinum-acridine was achieved, and the formulations were evaluated in A549 lung cancer xenograft models in mice. Improved anticancer efficacy of one of the liposomal formulations compared with the free drug was observed in this assay. In conclusion, the research in this dissertation has laid the foundation for the future preclinical development of platinum-acridines as oncology drugs by devising new synthetic methodology and providing proof-of-concept data in clinically relevant models of cancer.

Download or read book Platinum Based Drugs in Cancer Therapy written by Lloyd R. Kelland and published by Springer Science & Business Media. This book was released on 2000 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leading international experts comprehensively review all aspects of platinum anticancer drugs and their current use in treatment, as well as examining their future therapeutic prospects. Writing from a variety of disciplines, these authorities discuss the chemistry of cisplatin in aqueous solution, the molecular interaction of platinum drugs with DNA, and such exciting new areas as DNA mismatch repair and replicative bypass, apoptosis, and the transport of platinum drugs into tumor cells. The emergent platinum drugs of the future-orally active agents, the sterically hindered ZD0473, and the polynuclear charged platinum BBR3464-are also fully considered. Timely and interdisciplinary, Platinum-Based Drugs in Cancer Therapy offers cancer therapeutics specialists an illuminating survey of every aspect of platinum drugs from mechanisms of action to toxicology, tumor resistance, and new analogs.

Download or read book Advances in Metallodrugs written by Shahid Ul-Islam and published by John Wiley & Sons. This book was released on 2020-07-08 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is organized into 12 important chapters that focus on the progress made by metal-based drugs as anticancer, antibacterial, antiviral, anti-inflammatory, and anti-neurodegenerative agents, as well as highlights the application areas of newly discovered metallodrugs. It can prove beneficial for researchers, investigators and scientists whose work involves inorganic and coordination chemistry, medical science, pharmacy, biotechnology and biomedical engineering.

Download or read book Luminescent and Photoactive Transition Metal Complexes as Biomolecular Probes and Cellular Reagents written by Kenneth Kam-Wing Lo and published by Springer. This book was released on 2015-06-30 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Structure and Bonding publishes critical reviews on topics of research concerned with chemical structure and bonding. The scope of the series spans the entire Periodic Table and addresses structure and bonding issues associated with all of the elements. It also focuses attention on new and developing areas of modern structural and theoretical chemistry such as nanostructures, molecular electronics, designed molecular solids, surfaces, metal clusters and supramolecular structures. Physical and spectroscopic techniques used to determine, examine and model structures fall within the purview of Structure and Bonding to the extent that the focus is on the scientific results obtained and not on specialist information concerning the techniques themselves. Issues associated with the development of bonding models and generalizations that illuminate the reactivity pathways and rates of chemical processes are also relevant. The individual volumes in the series are thematic. The goal of each volume is to give the reader, whether at a university or in industry, a comprehensive overview of an area where new insights are emerging that are of interest to a larger scientific audience. Thus each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years should be presented using selected examples to illustrate the principles discussed. A description of the physical basis of the experimental techniques that have been used to provide the primary data may also be appropriate, if it has not been covered in detail elsewhere. The coverage need not be exhaustive in data, but should rather be conceptual, concentrating on the new principles being developed that will allow the reader, who is not a specialist in the area covered, to understand the data presented. Discussion of possible future research directions in the area is welcomed. Review articles for the individual volumes are invited by the volume editors. Readership: research scientists at universities or in industry, graduate students Special offer For all customers who have a standing order to the print version of Structure and Bonding, we offer free access to the electronic volumes of the Series published in the current year via SpringerLink.

Download or read book Medicinal Inorganic Chemistry written by Jonathan L. Sessler and published by . This book was released on 2005 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the current diagnostic and therapeutic uses of metal-containing compounds in medicine, as well as the role of metals in disease.

Download or read book Molecular Therapies of Cancer written by Georg F. Weber and published by Springer. This book was released on 2015-07-22 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular Therapies of Cancer comprehensively covers the molecular mechanisms of anti-cancer drug actions in a comparably systematic fashion. While there is currently available a great deal of literature on anti-cancer drugs, books on the subject are often concoctions of invited review articles superficially connected to one another. There is a lack of comprehensive and systematic text on the topic of molecular therapies in cancer. A further deficit in the relevant literature is a progressive sub-specialization that typically limits textbooks on cancer drugs to cover either pharmacology or medicinal chemistry or signal transduction, rather than explaining molecular drug actions across all those areas; Molecular Therapies of Cancer fills this void. The book is divided into five sections: 1. Molecular Targeting of Cancer Cells; 2. Emerging and Alternative Treatment Modalities; 3. Molecular Targeting of Tumor-Host Interactions; 4. Anti-Cancer Drug Pharmacokinetics; and 5. Supportive Therapies.

Download or read book Molecular Epidemiology written by Paul A. Schulte and published by Academic Press. This book was released on 2012-12-02 with total page 609 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will serve as a primer for both laboratory and field scientists who are shaping the emerging field of molecular epidemiology. Molecular epidemiology utilizes the same paradigm as traditional epidemiology but uses biological markers to identify exposure, disease or susceptibility. Schulte and Perera present the epidemiologic methods pertinent to biological markers. The book is also designed to enumerate the considerations necessary for valid field research and provide a resource on the salient and subtle features of biological indicators.

Download or read book Essentials of Inorganic Chemistry written by Katja A. Strohfeldt and published by John Wiley & Sons. This book was released on 2015-02-16 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive introduction to inorganic chemistry and, specifically, the science of metal-based drugs, Essentials of Inorganic Chemistry describes the basics of inorganic chemistry, including organometallic chemistry and radiochemistry, from a pharmaceutical perspective. Written for students of pharmacy and pharmacology, pharmaceutical sciences, medicinal chemistry and other health-care related subjects, this accessible text introduces chemical principles with relevant pharmaceutical examples rather than as stand-alone concepts, allowing students to see the relevance of this subject for their future professions. It includes exercises and case studies.

Download or read book Elemental Speciation in Human Health Risk Assessment written by P. Apostoli and published by World Health Organization. This book was released on 2006 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Definitions of species and speciation - - Strructural aspects of speciation - - Analytical techniques and methodology - - Bioaccessibility and bioavailability - - Toxicokinetics and biological monitoring - - Molecular and cellular mechanisms of metal toxicity - - Health effects - - Conclusions and recommendations.