Download or read book Novel Drug Delivery Approaches in Dry Eye Syndrome Therapy written by Slavomira Doktorovová and published by Nova Biomedical Books. This book was released on 2010 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Novel Drug Delivery Approaches in Dry Eye Syndrome Therapy written by Slavomira Doktorovová and published by Nova Biomedical Books. This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dry eye syndrome is a common disease of tear film and ocular surface developed in numerous aetiologies. Tear film instability and ocular surface disturbances that subsequently influence the tear film are among the primarily causes of this disease, but many other factors are involved in tear film disorders. Although eye surface is easily reached by classical ocular dosage forms, novel drug delivery systems for ocular administration offer advantages in terms of increased residence time on eye surface and/or controlled release of the drug, with enhanced therapeutic effectiveness. This new book provides an overview on the potential benefits and limitations in dry eye syndrome management and reported successful formulations.

Download or read book Ocular Drug Delivery Systems written by Manish Kumar and published by . This book was released on 2023-07 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Academic Paper from the year 2023 in the subject Medicine - Pharmacology, Pharmacy, course: M.Pharmacy, language: English, abstract: Ocular drug delivery plays a vital role in the treatment of various eye diseases and conditions. The unique anatomical and physiological characteristics of the eye pose significant challenges for effective drug delivery. Over the years, extensive research efforts have been dedicated to developing innovative strategies and formulations to overcome these challenges and improve therapeutic outcomes. This review provides an overview of recent advances in ocular drug delivery, highlighting the key challenges faced and discussing the potential future directions in this field. The first section of the review focuses on the barriers to ocular drug delivery, including the tear film, cornea, conjunctiva, and blood-ocular barriers. These barriers limit the bioavailability and efficacy of drugs administered to the eye. Strategies to bypass or overcome these barriers, such as the use of penetration enhancers, nanoparticles, and prodrug approaches, are discussed. The second section explores various ocular drug delivery systems, including eye drops, ophthalmic gels, ocular inserts, and contact lens-based delivery systems. Each system is examined in terms of its advantages, limitations, and recent advancements. Special attention is given to sustained drug release systems that aim to prolong drug residence time on the ocular surface and improve patient compliance. Next, the review delves into the role of nanotechnology in ocular drug delivery. Nanoparticles, liposomes, and nanomicelles have shown promise in improving drug solubility, stability, and ocular bioavailability. The use of novel nanomaterials and their surface modifications for targeted drug delivery to specific ocular tissues is also discussed. Furthermore, the review highlights emerging techniques in ocular drug delivery, such as microneedles, hydrogels, and gene therapy-based approach

Download or read book Development of a Topical Ocular Drug Delivery System Using Polymeric Nanoparticles written by Shengyan Liu and published by . This book was released on 2016 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Common eye diseases such as dry eye syndrome affect 15% of the population. Although eye drops are the most common treatment for these diseases, over 95% of the drugs applied through eye drops are quickly cleared away due to blinking and tear turnover. Consequently, patients struggle with the multiple daily applications required and the resulting side effects. Nanoparticle (NP) drug carriers have gained significant traction recently because of several advantages they provide over conventional eye drop delivery methods. NP surfaces can be tuned to achieve specific properties such as binding affinity towards the ocular surface. NPs can also carry a large amount of drugs and release them in a sustained manner over a long period. Due to their small size, NPs do not cause abrasive sensations on the eye upon patient application. With these unique advantages, NP drug carriers may drastically improve patient compliance while reducing side effects. The thesis focuses on developing an ocular drug delivery platform using NPs to improve retention of ocular therapeutics on the precorneal surface. We developed a method to synthesize an amphiphilic block copolymer composed of poly(D,L-lactide) (PLA) and dextran (Dex) that can self-assemble into NP drug carriers. The size of the NPs can be tuned between 15 and 70 nm by adjusting the molecular weights of PLA and/or Dex. The PLA-b-Dex NPs form the foundation of the ocular drug delivery platform developed in this thesis. A targeted delivery system is crucial for ocular drug delivery due to the rapid clearance by tear drainage on the corneal surface. The PLA-b-Dex NPs were surface modified with phenylboronic acid (PBA) molecules, which can undergo covalent binding with the mucous membrane to circumvent the rapid clearance. Due to the abundance of functional groups on the dextran, we were able to tune the density of PBA on the NP surface to optimize the binding affinity between the NPs and the mucin. While maximizing the PBA density on the NP surface improved the covalent interaction between the NPs and the mucin, it also compromised the NP colloidal stability. The PBA modified NPs demonstrated encapsulation of Cyclosporine A (CsA), a dry eye treatment drug, and sustained release for up to 5 days in vitro, showing their potential as a long-term eye drop delivery platform. We then performed biocompatibility and efficacy studies on these NPs using animal models. Biocompatibility is of the utmost importance in developing new drug delivery formulations. During the 12 weeks of study, no physical signs of irritation or discomfort were detected nor was any inflammatory response or ocular tissue damage observed in the eyes administered with NPs. Topical administration of CsA-loaded NPs on dry eye induced mice using once a week dosing demonstrated complete elimination of the inflammatory response as well as full recovery of the integrity of the ocular tissues. In the same study, the commercial eye drop form of CsA, Restasis®, administered thrice daily only eliminated the inflammatory infiltrates without recovering ocular goblet cells. By delivering CsA through PLA-b-Dex-g-PBA NPs, we can significantly reduce the dose and the frequency of eye drop administration without compromising the treatment efficacy. In vitro mucoadhesion as a result of PBA's on NP surfaces was demonstrated. We proceeded to further demonstrate this mucoadhesion using in vivo models. Indocyanine green (ICG), a near-infrared fluorescent dye, was encapsulated in the NPs and administered to rabbit eyes to track its ocular retention. ICG delivered via PBA modified NPs showed ocular retention beyond 24 hours on rabbit eyes, whereas free ICG or ICG delivered via unmodified NPs were mostly cleared within the first 3 hours. When the weekly dosing of CsA loaded PLA-b-Dex-g-PBA NPs was repeated for 4 weeks on dry eye induced mice, we observed the same elimination of inflammatory infiltrates but also the damaged ocular tissue structures. When the concentration of the CsA in the weekly dosing of NPs was further reduced 5 times, the treatment effect was much more pronounced, showing both the elimination of the inflammation and the full recovery of the ocular surface tissues. Overall, by using mucoadhesive nanoparticle drug carriers, we reduced the dosage of CsA at least 50-fold compared with the commercial product, Restasis®, without compromising the dry eye treatment efficacy. Finally, we developed a scalable method to synthesize PLA-b-Dex-g-PBA block copolymers using a semi-solid state reaction chemistry. The previous method of conjugating PBA to the Dex required long reaction hours with multiple reaction and purification steps. In contrast, the new method combines the quickness of a semi-solid state reaction with the simplicity of a Williamson ether chemistry to graft PBA to Dex. The results showed that the new method achieved a similar range of tunability of PBA density onto Dex using reaction times as short as 10 minutes. This thesis demonstrates the development process of a polymeric NP as a topical ocular drug delivery system. The PLA-b-Dex-g-PBA NPs demonstrated delivery of a clinically relevant dosage of dry eye therapeutics, controlled release of therapeutics over prolonged period of time, and mucoadhesive properties resulting in prolonged ocular surface retention of drugs. These mucoadhesive NPs show remarkable promise as a long-term topical ocular drug delivery system that significantly reduces the dose and the administration frequency of the eye drops while minimizing side effects.

Download or read book Ophthalmic Drug Delivery Systems written by Ashim K. Mitra and published by CRC Press. This book was released on 2019-12-02 with total page 847 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this text assembles significant ophthalmic advances and encompasses breakthroughs in gene therapy, ocular microdialysis, vitreous drug disposition modelling, and receptor/transporter targeted drug delivery.

Download or read book Ophthalmic Disease Mechanisms and Drug Discovery written by Kang Zhang and published by World Scientific Publishing Company Incorporated. This book was released on 2016-02-29 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This invaluable book presents a concise discussion on the most important topics of ophthalmology — mechanism of ophthalmic diseases, imaging techniques used for diagnosis, novel therapies and drug delivery systems. It also covers current knowledge about anti-VEGF therapies that revolutionized neovascular AMD treatment, anti-inflammatory and dry eye treatment, as well as nanoparticles use of drug delivery.Written by experts in ophthalmology, this unique volume provides a comprehensive overview of the latest research in the field. This is an essential reading that will provide up-to-date reference to practicing physicians and current knowledge to residents and students.

Download or read book Bio Targets and Drug Delivery Approaches written by Sabyasachi Maiti and published by CRC Press. This book was released on 2016-11-03 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advances in drug delivery systems over recent years have resulted in a large number of novel delivery systems with the potential to revolutionize the treatment and prevention of diseases. Bio-Targets and Drug Delivery Approaches is an easy-to-read book for students, researchers and pharmaceutical scientists providing a comprehensive introduction to the principles of advanced drug delivery and targeting their current applications and potential future developments.

Download or read book Intraocular Drug Delivery written by Glenn J. Jaffe and published by CRC Press. This book was released on 2006-03-13 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference studies the most recent advances in the development of ocular drug delivery systems. Covering methods to treat or prevent ocular inflammation, retinal vascular disease, retinal degeneration, and proliferative eye disease, this source covers breakthroughs in the management of endophthalmitis, uveitis, diabetic macular edema, and age-r

Download or read book Bioadhesives in Drug Delivery written by K. L. Mittal and published by John Wiley & Sons. This book was released on 2020-05-12 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the phenomenon of bioadhesion i.e. its theories or mechanism(s) are of critical importance in developing optimum bioadhesive polymers (used in bioadhesives). Such bioadhesive polymers are the key for exhibiting the process of bioadhesion, controlled/sustained release of drugs, and drug targeting. The use of bioadhesives restricts the delivery system to the site of interest and thus offers a useful and efficient technique for targeting a drug to the desired location for a prolonged duration. This book addresses the various relevant aspects of bioadhesives in drug delivery in an easily accessible and unified manner. The book containing 12 chapters written by eminent researchers from many parts of the globe is divided into three parts: Part 1: Fundamental Aspects; Part 2: Bioadhesive Formulations; Part 3: Drug Delivery Applications. The topics covered include: Theories and mechanisms of bioadhesion; bioadhesive polymers for drug delivery applications; methods for characterization of bioadhesiveness of drug delivery systems; bioadhesive films and drug delivery applications; bioadhesive nanoparticles; and bioadhesive hydrogels and applications ocular biodhesive drug delivery systems; buccal bioadhesive drug delivery systems; gastrointestinal bioadhesive drug delivery systems ; nasal bioadhesive drug delivery systems; vaginal drug delivery systems; pulmonary bioadhesive drug delivery systems.

Download or read book Conjunctivitis written by Anna R. Sallinger and published by Nova Sciene Publishers. This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conjunctivitis (commonly called "pink eye" or "Madras eye" is an inflammation of the conjunctiva (the outermost layer of the eye and the inner surface of the eyelids), most commonly due to an allergic reaction or an infection (usually viral, but sometimes bacterial). In this book, the authors discuss allergic disorders of the conjunctiva as well as novel drug delivery approaches in dry eye syndrome therapy. Allergic contact conjunctivitis caused by ophthalmic preparations is explored and examined also are the clinical signs of conjunctivitis.

Download or read book The Wills Eye Manual written by Adam T. Gerstenblith and published by Lippincott Williams & Wilkins. This book was released on 2012-05-11 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thoroughly revised Sixth Edition of this classic reference on ocular disease is the perfect guide for all clinicians who treat eye disorders. Written in a concise outline format, this quick reference is perfect for diagnosis and management of hundreds of ocular conditions. This pocket-size manual covers - from symptoms to treatment - all ocular disorders likely to be encountered in the office, emergency room, or hospital setting.

Download or read book Treatment of Non infectious Uveitis written by Phoebe Lin and published by Springer Nature. This book was released on 2019-09-12 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique, comprehensive book provides a much-needed reference on the treatment and management of non-infectious uveitis. Carefully designed, Treatment of Non-infectious Uveitis is the first book of its kind to provide an in-depth, clinically-relevant, expert-driven resource for ophthalmologists focusing on modalities of uveitis treatment, their mechanism of action, dosing, and side effects. Each chapter provides an introduction, mechanism of action, indication, dosage, side effects, and efficacy summaries from clinical trials and other published literature. Topics range from topical treatment, to locally administered therapy including drug-releasing implants, to systemic immunosuppressive treatments both tried and new, as well as surgical management, with each chapter highlighting important practice pearls as well as easy-reference dosing tables, side effects, and lab monitoring pertinent to the agents discussed. The book concludes with a discussion of novel approaches to the treatment of non-infectious uveitis, and special considerations when treating uveitis in the pediatric patient. The majority of patients with non-infectious uveitis are treated by comprehensive ophthalmologists, many of whom are less familiar with established treatment guidelines outlining the role of corticosteroids and immunomodulatory therapy. While the non-specialist, resident, or fellow is sure to benefit from this one-stop guide to uveitis treatment, retina and uveitis specialists alike will also appreciate the practice tips and thorough coverage of this expertly-written reference. Treatment of Non-infectious Uveitis is the ideal reference for all ophthalmologists who seek to improve their understanding of the causes of uveitis and learn how to best treat this condition.

Download or read book Ocular Surface Disorders written by Jose M Benitez-del-Castillo and published by JP Medical Ltd. This book was released on 2013-11-04 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current knowledge of the epidemiology, clinical expression, pathophysiology and available medical and surgical therapy for ocular surface diseases, providing an invaluable text for ocular surface specialists, general ophthalmologists, optometrists and residents.

Download or read book Drug Delivery book written by Ashim K. Mitra and published by Jones & Bartlett Publishers. This book was released on 2014-08-08 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drug Delivery is the latest and most up-to-date text on drug delivery and offers an excellent working foundation for students and clinicians in health professions and graduate students including nursing, pharmacy, medicine, dentistry, as well as researchers and scientists. Presenting this complex content in an organized and concise format, Drug Delivery allows students to gain a strong understanding of the key concepts of drug delivery. This text focuses on the basic concepts of drug delivery while thoroughly examining various topics such as: CNS delivery Gene delivery Ocular delivery World-wide research on drug delivery Recent advances in drug delivery A significant advancement has been made in the field of drug delivery. This text provides a detailed overview of drug delivery systems, routes of drug administration and development of various formulations. The cutting edge research being carried out in this field will be compiled and a focus on worldwide research on drug delivery and targeting at the molecular, cellular, and organ levels will also be summarized. Each new print copy includes access to the Navigate Companion Website including: Chapter Quizzes, Interactive Glossary, Crossword Puzzles , Interactive Flashcards, and Matching Exercises

Download or read book Role of Novel Drug Delivery Vehicles in Nanobiomedicine written by Rajeev K. Tyagi and published by BoD – Books on Demand. This book was released on 2020-02-26 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Medical Nanotechnology and Nanomedicine introduces non-experts to the world of nanomedicine and its evolving organizational infrastructure. Considering the fluid nature of nano breakthroughs and the delicate balance between benefits and consequences as they apply to medicine, readers at all levels will gain a practical, understandable base of information on these developments so that they may take the greatest advantage of them. This practical reference investigates the impact of nanotechnology on applications in medicine and biomedical sciences, and the broader societal and economic effects. Eschewing technological details, it focuses on enhancing awareness of the business, regulatory, and administrative aspects of medical applications. It gives readers a critical, balanced, and realistic evaluation of existing nanomedicine developments and future prospects and provides an ideal foundation upon which to plan and make decisions.

Download or read book Innovative Dosage Forms written by Yogeshwar Bachhav and published by John Wiley & Sons. This book was released on 2019-12-04 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: Teaches future and current drug developers the latest innovations in drug formulation design and optimization This highly accessible, practice-oriented book examines current approaches in the development of drug formulations for preclinical and clinical studies, including the use of functional excipients to enhance solubility and stability. It covers oral, intravenous, topical, and parenteral administration routes. The book also discusses safety aspects of drugs and excipients, as well as regulatory issues relevant to formulation. Innovative Dosage Forms: Design and Development at Early Stage starts with a look at the impact of the polymorphic form of drugs on the preformulation and formulation development. It then offers readers reliable strategies for the formulation development of poorly soluble drugs. The book also studies the role of reactive impurities from the excipients on the formulation shelf life; preclinical formulation assessment of new chemical entities; and regulatory aspects for formulation design. Other chapters cover innovative formulations for special indications, including oncology injectables, delayed release and depot formulations; accessing pharmacokinetics of various dosage forms; physical characterization techniques to assess amorphous nature; novel formulations for protein oral dosage; and more. -Provides information that is essential for the drug development effort -Presents the latest advances in the field and describes in detail innovative formulations, such as nanosuspensions, micelles, and cocrystals -Describes current approaches in early pre-formulation to achieve the best in vivo results -Addresses regulatory and safety aspects, which are key considerations for pharmaceutical companies -Includes case studies from recent drug development programs to illustrate the practical challenges of preformulation design Innovative Dosage Forms: Design and Development at Early Stage provides valuable benefits to interdisciplinary drug discovery teams working in industry and academia and will appeal to medicinal chemists, pharmaceutical chemists, and pharmacologists.

Download or read book Ocular Surface Disease Cornea Conjunctiva and Tear Film written by Edward J Holland and published by Elsevier Health Sciences. This book was released on 2013-05-17 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ocular Surface Disease: Cornea, Conjunctiva and Tear Film incorporates current research and the latest management strategies as well as classification systems and treatment paradigms for all forms of ocular surface disease. This is the first comprehensive resource that helps you to meet ocular surface disease challenges effectively using today's best medical and surgical approaches. Get the complete, evidence-based guidance you need to provide optimal care for your patients with ocular surface disease. Implement the latest drug treatments and surgical interventions to provide better outcomes with fewer complications. Hone and expand your surgical skills by watching videos of leading experts performing advanced procedures including ocular surface transplantation techniques; amniotic membrane transplantation; pterygium surgery; lamellar keratoplasty (DALK) in ocular surface disease; and keratoprosthesis surgery. Visualize how to proceed by reviewing detailed, full-color images and consulting new classification systems and treatment paradigms for mild to severe forms of ocular surface disease. Take it with you anywhere! Access the full text, downloadable image library, video clips, and more online at expertconsult.com.