Synthesis and Studies of Novel Porphyrins and Their Potential Use in Photodynamic Therapy PDF Download
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Author: Telmo L. C. Figueiredo
Publisher:
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Category :
Languages : en
Pages :
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Author: Telmo L. C. Figueiredo
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
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Category :
Languages : en
Pages : 0
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Author: Alexandra M. P. Santana Sorensen
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Category :
Languages : en
Pages :
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Author: R. Cubeddu
Publisher: Springer Science & Business Media
ISBN: 1468447211
Category : Science
Languages : en
Pages : 442
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Book Description
This book contains the contributions of the participants to the International Symposium on Porphyrins in Tumor Phototherapy held in Bruzzano (Milano), Italy on May 26-28, 1983. The contributions are written as extended papers to provide a broad and representative coverage of the use of porphyrins in tumor phototherapy and diagnosis. In the last few years, this technique has received increasing interest for its potential applications in clinical oncology. In fact, 1,500 patients have been already treated by this therapy which has been tested in more than 100 clinical centres. Among the reported cases, a significant therapeutic effectiveness was found in some early stage cancers of lung, esophagus and stomach. The development of ·this therapy requires interdisciplinary studies from such diverse fields as physics, chemistry, biology, pharmacology, and experimental and clinical oncology. The contents of the book reflect the character of this research and deal with all the problems, from fundamental to clinical, that still require to be analysed and understood for a better evaluation 'of the potential of this therapy. The first chapter of the book deals with photophysics ?;nd.
Author: Katriann Arja
Publisher: Linköping University Electronic Press
ISBN: 9176852555
Category :
Languages : en
Pages : 105
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Organic compounds that interact both with certain biological targets and display specific photophysical properties can be utilized as molecular tools to visualize and possibly effect disease related processes taking place in living organisms. In this regard, porphyrins are a class of naturally occurring molecules that possess intriguingly interesting photophysical properties where they can act as luminescent probes by emitting detectable light, as well as photosensitizers in the light mediated therapy called photodynamic therapy. In this thesis, the porphyrin structure has been synthetically combined with other molecule classes to achieve compounds with desirable multimodal characteristics. Firstly, luminescent conjugated oligothiophenes (LCOs) that have extensively, and with great success, been utilized as fluorescent ligands for amyloid formations, have been conjugated to porphyrins to render oligothiophene porphyrin hybrids (OTPHs) comprising two optically active modalities. When applied as fluorescent amyloidophilic dyes for visualization of amyloid-? (A?), one of the pathological hallmarks in Alzheimer’s disease, an enhanced optical assignment of distinct aggregated forms of A? was afforded. Thus, properly functionalized OTPHs could give us more information about pathological processes underlying devastating disorders, such as Alzheimer’s disease. In addition, the OTPHs can be associated with synthetic peptides inducing peptide folding into certain three-dimensional helical structures giving rise to novel optically active materials. Secondly, this thesis also embraces porphyrins’ potential as photosensitizers in photodynamic therapy to kill cancer cells. Grounded on the prerequisites for an optimal photosensitizer, we designed porphyrin-based conjugates equipped with common carbohydrates for improved cancer cell selectivity and with a fluorinated glucose derivative, 2-fluoro 2-deoxy glucose, for advantageous metabolism in cancer cells. Furthermore, incorporation of a radioisotopic fluorine-18 atom into the glycoporphyrins could give the means for diagnostic use of the conjugates in positron emission tomography (PET). In order to tether together the above-mentioned molecular moieties in a controlled fashion, we developed a robust synthetic strategy for asymmetrical functionalization of porphyrin core. The method involves chlorosulfonation of this otherwise inert tetrapyrrolic structure, followed by alkynylation. Parallelly to amide coupling reactions, copper(I)-catalyzed alkyne azide cycloaddition is used for fast and high-yielding late-stage conjugations. Overall, this thesis demonstrates how combining different molecular moieties in synthetic organic chemistry yields novel molecules with combined and improved multimodal properties for biological and medicinal applications, guided by the design-by-function methodology.
Author: Karl M. Kadish
Publisher: World Scientific Publishing Company
ISBN: 9789811246753
Category : Science
Languages : en
Pages : 360
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Book Description
Research in the area of porphyrins, phthalocyanines and related macrocycles continues to expand at a phenomenal rate with literally thousands of original articles being published every year in the fields of chemistry, physics, biology, material science and photodynamic therapy. The current volume comprehensively summarizes key aspects involved in the synthesis, characterization and use of these compounds, as well as computational methodologies for the design of novel tetrapyrroles whose structural and electronic properties are described. Each chapter is authored by an expert or group of experts in the field who were asked to write 'a review for the ages' and we anticipate that what is written in this volume will remain relevant for at least the next 15 years, and possibly longer.This volume should be considered as required reading for both new and experienced researchers in a number of sub-disciplines where tetrapyrroles are studied or utilized in a variety of applications. A complete understanding of the chemistry of these compounds necessitates not only a knowledge of what has been accomplished in the area of synthesis and characterization but also a knowledge of what is possible in the future when using porphyrins and related tetrapyrroles as key components for applications in catalysis, energy production and biomedical applications.
Author: Joseph Earl Bradshaw
Publisher:
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Category :
Languages : en
Pages :
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Photodynamic therapy (PDT) agents are light-activated materials used for localized disease treatment. Porphyrins are classic representations of photosensitive agents. Identified by their large, planar molecular structure, porphyrins are centrally composed of four pyrrole rings. Through this project, the starting material, H2TPPC, a tetra-carboxylic acid porphyrin, was first synthesized and later modified through the addition of the amine, morpholin-2-ylmethanol. This multi-step synthesis resulted in the highly water-soluble porphyrin product H2TPP-MorphMeOH. Following this synthesis, the compound was purified using liquid chromatography, and then structurally identified and classified using infrared (IR), nuclear magnetic resonance (NMR), and UV-Vis spectroscopies. Lastly, to determine its utility as a potential PDT agent, the cytotoxicity of H2TPP-MorphMeOH was determined using an MTT assay on MDA-MB-231 triple negative breast cancer cells comparing exposure and absence of white light.
Author: Karl Kadish
Publisher: Elsevier
ISBN: 9780123932297
Category : Science
Languages : en
Pages : 236
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Book Description
The Porphyrin Handbook, Volume 19: Applications of Phthalocyanines provides information pertinent to every aspect of the chemistry, synthesis, spectroscopy, and structure of phthalocyanines. This book examines the biology and medical implications of porphyrin systems. Organized into five chapters, this volume begins with an overview of the basic photobiology of phthalocyanines, their structure-activity relationships, mechanisms of action in a variety of biological systems, and their potential applications for various medical purposes. This text then examines the type of organization of the molecules in the solid state and the intensity of the intermolecular interactions. Other chapters consider the applications of phthalocyanines as decorative and functional materials, with emphasis on properties and structures of phthalocyanines with industrial relevance. This book discusses as well the enzyme-like catalytic functions of metal complexes derivatives and their practical applications as odor-removing systems and bacterial systems based on their effective catalytic activities. This book is a valuable resource for research scientists, engineers, and clinicians.
Author: Kathryn Wynne Woodburn
Publisher:
ISBN:
Category : Cancer
Languages : en
Pages : 334
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Author: Karl M Kadish
Publisher: World Scientific
ISBN: 9814462241
Category : Science
Languages : en
Pages : 2271
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Book Description
This is the fourth set of Handbook of Porphyrin Science.Porphyrins, phthalocyanines and their numerous analogues and derivatives are materials of tremendous importance in chemistry, materials science, physics, biology and medicine. They are the red color in blood (heme) and the green in leaves (chlorophyll); they are also excellent ligands that can coordinate with almost every metal in the Periodic Table. Grounded in natural systems, porphyrins are incredibly versatile and can be modified in many ways; each new modification yields derivatives, demonstrating new chemistry, physics and biology, with a vast array of medicinal and technical applications.As porphyrins are currently employed as platforms for study of theoretical principles and applications in a wide variety of fields, the Handbook of Porphyrin Science represents a timely ongoing series dealing in detail with the synthesis, chemistry, physicochemical and medical properties and applications of polypyrrole macrocycles. Professors Karl Kadish, Kevin Smith and Roger Guilard are internationally recognized experts in the research field of porphyrins, each having his own separate area of expertise in the field. Between them, they have published over 1500 peer-reviewed papers and edited more than three dozen books on diverse topics of porphyrins and phthalocyanines. In assembling the new volumes of this unique handbook, they have selected and attracted the very best scientists in each sub-discipline as contributing authors.This handbook will prove to be a modern authoritative treatise on the subject as it is a collection of up-to-date works by world-renowned experts in the field. Complete with hundreds of figures, tables and structural formulas, and thousands of literature citations, all researchers and graduate students in this field will find the Handbook of Porphyrin Science an essential, major reference source for many years to come.
