Antimicrobial Photodynamic Therapy

Nanostructures for Antimicrobial Therapy discusses the pros and cons of the use of nanostructured materials in the prevention and eradication of infections, highlighting the efficient microbicidal effect of nanoparticles against antibiotic-resistant pathogens and biofilms. Conventional antibiotics are becoming ineffective towards microorganisms due to their widespread and often inappropriate use. As a result, the development of antibiotic resistance in microorganisms is increasingly being reported. New approaches are needed to confront the rising issues related to infectious diseases. The merging of biomaterials, such as chitosan, carrageenan, gelatin, poly (lactic-co-glycolic acid) with nanotechnology provides a promising platform for antimicrobial therapy as it provides a controlled way to target cells and induce the desired response without the adverse effects common to many traditional treatments. Nanoparticles represent one of the most promising therapeutic treatments to the problem caused by infectious micro-organisms resistant to traditional therapies. This volume discusses this promise in detail, and also discusses what challenges the greater use of nanoparticles might pose to medical professionals. The unique physiochemical properties of nanoparticles, combined with their growth inhibitory capacity against microbes has led to the upsurge in the research on nanoparticles as antimicrobials. The importance of bactericidal nanobiomaterials study will likely increase as development of resistant strains of bacteria against most potent antibiotics continues. Shows how nanoantibiotics can be used to more effectively treat disease Discusses the advantages and issues of a variety of different nanoantibiotics, enabling medics to select which best meets their needs Provides a cogent summary of recent developments in this field, allowing readers to quickly familiarize themselves with this topic area

Antimicrobial Photodynamic Therapy: Concepts and Applications explores the novel antimicrobial therapeutic technique. As the world searches for new, efficient modalities for fighting microorganisms, this book offers a complete understanding of the concept, and knowledge about the emerging technique ‘antimicrobial photodynamic therapy’ (aPDT) for the scientific communities and budding researchers. The book aligns concepts, significance, and applications of the technique systematically. Chapters in the book cover microorganisms, pathogenesis, conventional treatment methods, and significance of new treatment approaches to the concept of antimicrobial photodynamic therapy. The authors describe the mechanism behind it, with applications and examples from research studies. The book discusses photosensitisers in detail, with one chapter emphasising natural photosensitisers. Use of nanostructures in the antimicrobial photodynamic therapy is elaborated on, and we conclude with a well-explored application of the therapeutic technique in dentistry. Features: Efficiently covers the topic in detail with scientifically proven examples. Applications of the therapeutic approach are well discussed, and readers can learn about the research gaps, challenges, and future of the technique. Starts from basics, enabling readers to understand why the approach is relevant and important for study. Simplistic elucidated concepts and applications make it accessible at all levels.

Photodynamic therapy (PDT) was discovered over one hundred years ago after observing the death of microorganisms upon exposure to dyes and light. It is the combination of non-toxic dyes and harmless visible light that, in the presence of oxygen, produce highly toxic reactive species. The principal medical application during the last century was in cancer therapy but, in these days of rising antibiotic resistance, PDT shows increasing promise as an alternative approach to treating infections. PDT has also been used in blood product sterilization, peridontology, acne reduction, and the treatment of viral lesions such as those caused by human papilloma virus. It may also have potential as an environmentally friendly pesticide. This is the first and only book to comprehensively cover the use of light and photosensitising agents for controlling microbial pathogens. It provides a comprehensive and up-to-date coverage of an emerging field. There are several chapters on the design of antimicrobial photosensitizers, their use to kill pathogenic organisms and their success in treating infections in animal models. It has long been known that gram-positive bacteria are highly susceptible to photoinactivation but the book also discusses means of widening the range of microorganisms that can be tackled by PDT. Edited by two pioneers in the application of PDT to medical and environmental issues, this book covers the basic science, translational research in animals, and the clinical applications in various medical specialities. It represents an indispensable resource for microbiologists and infectious disease doctors as well as dentists, dermatologists, gastroenterologists and transfusion specialists.

Comprehensive Series in Photochemical and Photobiological Sciences. Photodynamic therapy (PDT) is increasingly being used amongst health practitioners in combating a variety of disease. This book reviews the current state of development of PDT, and also presents the foreseeable advancements of the field in the next decade. Practitioners in biological sciences, biotechnology and medicinal and pharmaceutical chemistry will find this book an invaluable source of information. Chapters are drawn from research discusses at the 10th International Symposium on Photodynamic Therapy and Photodiagnosis in Clinical Practice in Brixen and are written and edited by leaders in the field. Mirroring the philosophy of that meeting, this book contains an informative balance of the basic sciences and clinical applications of PDT. Following an introduction to PDT, its history, and how techniques have developed, chapter serve as a practical guide for practitioners, covering topics such as sensitizer dosage and light dosage, and examples of relevant studies. The text goes further tp explore areas outside the medical field, such as the impact of PDT on society and the environment, and the economics of therapies. This book is dedicated to the memory of Professor Giulio Jori, and expert in this field, who sadly passed away on the 23rd December 2014.

Abstract: Considering increasing number of pathogens resistant towards commonly used antibiotics as well as antiseptics, there is a pressing need for antimicrobial approaches that are capable of inactivating pathogens efficiently without the risk of inducing resistances. In this regard, an alternative approach is the antimicrobial photodynamic therapy (aPDT). The antimicrobial effect of aPDT is based on the principle that visible light activates a per se non-toxic molecule, the so-called photosensitizer (PS), resulting in generation of reactive oxygen species that kill bacteria unselectively via an oxidative burst. During the last 10-20 years, there has been extensive in vitro research on novel PS as well as light sources, which is now to be translated into clinics. In this review, we aim to provide an overview about the history of aPDT, its fundamental photochemical and photophysical mechanisms as well as photosensitizers and light sources that are currently applied for aPDT in vitro. Furthermore, the potential of resistances towards aPDT is extensively discussed and implications for proper comparison of in vitro studies regarding aPDT as well as for potential application fields in clinical practice are given. Overall, this review shall provide an outlook on future research directions needed for successful translation of promising in vitro results in aPDT towards clinical practice

Handbook of Nano-biomaterials for Therapeutics and Diagnostic Applications covers in-depth topics on nano-biomaterials and nano drug delivery systems (biosensors and bioimaging) involving polymer nanocomposites, metal nanocomposites, and other carbon family fibers and proteins. The book covers the current application of tiny machines or nanodevices and their use as early detection systems for life threatening diseases, giving detailed literature on the development of nanodevices, their use as diagnostic tools, and their present trend in the industry and market. In addition, their synthesis, potential applications and future of smart nanodevices in diagnosis of diseases and their use as smart clinical devices is covered. Users will find sections on recent advances in interdisciplinary research on the processing, morphology, structure and properties of nanostructured materials and their applications in drug delivery for various diseases such as cancer, tuberculosis, Alzheimer disease, ophthalmic diseases, and more. Offers a comprehensive coverage of the therapeutics and smart nanodevices as diagnostic tools and their potential clinical applications in biosensing and bioimaging Includes a glimpse into the nano-biomaterials that are essential components in nanomedicines Describes nanodevices in the early diagnosis of the diseases Explains the nano-drug delivery system for the treatment of various diseases, including cancer, tuberculosis, Alzheimer disease, and ophthalmic diseases Encompasses all information, starting from the design of nano-biomaterials to their applications in theranostics

Advanced Laser Surgery in Dentistry delivers a state-of-the-art reference for laser technology in the context of a dental practice. The book encompasses oral surgery, periodontology, and implant dentistry, covering the latest research, knowledge, and clinical practices. The author demonstrates the clinical relevance by including many real-world clinical cases that illustrate the application of the discussed techniques. The book includes high-quality, color photographs throughout to support the text and add visual information to the covered topics, which include wound healing, oral surgery, periodontology, implant dentistry, and laser fundamentals and safety considerations. Advanced Laser Surgery in Dentistry provides readers with a step-by-step guide for using lasers in dental practice and discusses likely new directions and possible future treatments in the rapidly advancing field of laser dentistry. Readers will also benefit from a wide variety of subjects, including: A thorough introduction to the fundamentals of lasers, including the beam, the laser cavity, active mediums, lenses, resonators, and delivery systems An exploration of lasers and wound healing, including soft tissue and bone healing, as well as laser-assisted excisions and osteotomies An analysis of lasers in periodontology, including laser-assisted bacteria reduction in the periodontal tissues and the removal of subgingival dental calculus A discussion of lasers in implant dentistry and treatment for peri-implantitis Perfect for oral and maxillofacial surgeons, periodontists, and implant dentists, as well as general dentists, Advanced Laser Surgery in Dentistry will also earn a place in the libraries of dental students and residents seeking to improve their understanding of laser-based oral and dental procedures with a carefully organized reference guide.

In the pursuit of technological advancement in the field of biotechnology and pharmaceutical industries to counteract health issues, bacterial infections remain a major cause of morbidity and mortality. The ability of bacterial pathogens to form biofilms further agglomerates the situation by showing resistance to conventional antibiotics. To overcome this serious issue, bioactive metabolites and other natural products were exploited to combat bacterial infections and biofilm-related health consequences. Natural products exhibited promising results in vitro, however; their efficacy in in vivo conditions remain obscured due to their low-solubility, bioavailability, and biocompatibility issues. In this scenario, nanotechnological interventions provide a multifaceted platform for targeted delivery of bioactive compounds by slow and sustained release of drug-like compounds. The unique physico-chemical properties, biocompatibility and eco-friendly nature of bioinspired nanostructures has revolutionized the field of biology to eradicate microbial infections and biofilm-related complications. The green-nanotechnology based metal and metal oxide nanoparticles and polymeric nanoparticles have been regularly employed for antimicrobial and antibiofilm applications without causing damage to host tissues. The implications of these nanoparticles toward achieving sustainability in agriculture by providing systemic resistance against a variety of phytopathogens therefore plays crucial role in growth and crop productivity. Also the advent of smart and hybrid nanomaterials such as metal-based polymer nanocomposites, lipid-based nanomaterials and liposomes have the inherent potential to eradicate bacterial biofilm-related infections in an efficient manner. The recent development of carbon-based nanomaterials such as carbon nanotubes (CNTs) and silica based nanomaterials such as mesoporous silica nanoparticles (MSNs) also exploit a target of dreadful healthcare conditions such as cancer, immunomodulatory diseases, and microbial infections, as well as biofilm-related issues owing to their stability profile, biocompatibility, and unique physio-chemical properties. Recently novel physical approaches such as photothermal therapy (PTT) and antimicrobial photodynamic therapy (aPDT) also revolutionized conventional strategies and are engaged in eradicating microbial biofilm-related infections and related health consequences. These promising advancements in the development of novel strategies to treat microbial infections and biofilm-related multidrug resistance (MDR) phenomenon may provide new avenues and aid to conventional antimicrobial therapeutics.