Regulation of inflammation and angiogenesis in the cornea

Regulation of inflammation and angiogenesis in the cornea
Author: Anthony Mukwaya
Publisher: Linköping University Electronic Press
Total Pages: 76
Release: 2018-05-21
Genre: Capillaries
ISBN: 9176852849

Inflammation and angiogenesis, the growth of new blood vessels from pre-existing ones, are involved in tumor growth, ocular diseases and wound healing. In ocular angiogenesis, new pathological vessels grow into a specific eye tissue, leak fluid, and disrupt vision. The development of safe and effective therapies for ocular angiogenesis is of great importance for preventing blindness, given that current treatments have limited efficacy or are associated with undesirable side effects. The search for alternative treatment targets requires a deeper understanding of inflammation and how it can lead to angiogenesis in the eye in pathologic situations. This thesis provides new insights into the regulation of inflammation and angiogenesis, particularly at the gene expression and phenotypic levels, in different situations characterized by angiogenesis of the cornea, often called corneal neovascularization. For instance, specific genes and pathways are either endogenously activated or suppressed during active inflammation, wound healing, and during resolution of inflammation and angiogenesis, serving as potential targets to modulate the inflammatory and angiogenic response. In addition, as part of the healing response to restore corneal transparency, inflammation and angiogenesis subside with time in the cornea. In this context, LXR/RXR signaling was found to be activated in a time-dependent manner, to potentially regulate resolution of inflammation and angiogenesis. During regression of new angiogenic capillaries, ghost vessels and empty basement membrane sleeves are formed, which can persist in the cornea for a long time. Here, ghost vessels were found to facilitate subsequent revascularization of the cornea, while empty basement membrane sleeves did not revascularize. The revascularization response observed here was characterised by vasodilation, increased inflammatory cell infiltration and by sprouting at the front of the reperfused vessels. Importantly, reactive oxygen species and nitrous oxide signaling among other pro-inflammatory pathways were activated, and at the same time anti-inflammatory LXR/RXR signaling was inhibited. The interplay between activation and inhibition of these pathways highlights potential mechanisms that regulate corneal revascularization. When treating corneal neovascularization clinically, corticosteroids are in widespread use due to their effectiveness. To minimize the many undesirable side effects associated with corticosteroid use, however, identifying new and more selective agents is of great importance. Here, it was observed that corticosteroids not only suppressed pro-inflammatory chemokines and cytokines, but also activated the classical complement pathway. Classical complement may represent a candidate for further selective therapeutic manipulation to investigate its effect on treatment of corneal neovascularization. In summary, this thesis identifies genes, pathways, and phenotypic responses involved in sprouting and remodeling of corneal capillaries, highlights novel pathways and factors that may regulate inflammation and angiogenesis in the cornea, and provides insights into regulation of capillary regression and reactivation. Further investigation of these regulatory mechanisms may offer alternative and effective treatment targets for the treatment of corneal inflammation and angiogenesis.

Angiogenesis Assays

Angiogenesis Assays
Author: Carolyn A. Staton
Publisher: John Wiley & Sons
Total Pages: 410
Release: 2007-01-11
Genre: Medical
ISBN: 047002934X

Angiogenesis, the development of new blood vessels from the existing vasculature, is essential for physiological growth and over 18,000 research articles have been published describing the role of angiogenesis in over 70 different diseases, including cancer, diabetic retinopathy, rheumatoid arthritis and psoriasis. One of the most important technical challenges in such studies has been finding suitable methods for assessing the effects of regulators of eh angiogenic response. While increasing numbers of angiogenesis assays are being described both in vitro and in vivo, it is often still necessary to use a combination of assays to identify the cellular and molecular events in angiogenesis and the full range of effects of a given test protein. Although the endothelial cell - its migration, proliferation, differentiation and structural rearrangement - is central to the angiogenic process, it is not the only cell type involved. the supporting cells, the extracellular matrix and the circulating blood with its cellular and humoral components also contribute. In this book, experts in the use of a diverse range of assays outline key components of these and give a critical appraisal of their strengths and weaknesses. Examples include assays for the proliferation, migration and differentiation of endothelial cells in vitro, vessel outgrowth from organ cultures, assessment of endothelial and mural cell interactions, and such in vivo assays as the chick chorioallantoic membrane, zebrafish, corneal, chamber and tumour angiogenesis models. These are followed by a critical analysis of the biological end-points currently being used in clinical trials to assess the clinical efficacy of anti-angiogenic drugs, which leads into a discussion of the direction future studies should take. This valuable book is of interest to research scientists currently working on angiogenesis in both the academic community and in the biotechnology and pharmaceutical industries. Relevant disciplines include cell and molecular biology, oncology, cardiovascular research, biotechnology, pharmacology, pathology and physiology.

Contact Lens Complications

Contact Lens Complications
Author: Nathan Efron
Publisher:
Total Pages: 292
Release: 2004
Genre: Medical
ISBN:

The new 2nd edition of this practical manual has been completely updated and revised to reflect the most current knowledge, research findings, technological developments, and updates in contact lens materials. With its broad coverage and systematic approach, it provides an intuitive approach to understanding, diagnosing, and treating contact lens complications. This lavishly illustrated text is recognized as a definitive resource on contact lens for practitioners and students.

Ocular Surface Disease: Cornea, Conjunctiva and Tear Film

Ocular Surface Disease: Cornea, Conjunctiva and Tear Film
Author: Edward J Holland
Publisher: Elsevier Health Sciences
Total Pages: 474
Release: 2013-05-17
Genre: Medical
ISBN: 1455728764

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.

Contact Lens Practice E-Book

Contact Lens Practice E-Book
Author: Nathan Efron
Publisher: Elsevier Health Sciences
Total Pages: 550
Release: 2016-11-27
Genre: Medical
ISBN: 0702066613

In this thoroughly revised and updated third edition of Contact Lens Practice, award-winning author, researcher and lecturer, Professor Nathan Efron, provides a comprehensive, evidence-based overview of the scientific foundation and clinical applications of contact lens fitting. The text has been refreshed by the inclusion of ten new authors – a mixture of scientists and clinicians, all of whom are at the cutting edge of their specialty. The chapters are highly illustrated in full colour and subject matter is presented in a clear and logical format to allow the reader to quickly hone in the desired information. - Ideal for an optometrist, ophthalmologist, orthoptist, optician, student, or work in the industry, this book will serve as an essential companion and guide to current thinking and practice in the contact lens field. - Highlights of this edition include a new chapter on myopia control contact lenses, as well are completely rewritten chapters, by new authors, on keratoconus, orthokeratology, soft and rigid lens measurement and history taking.

Corneal Regeneration

Corneal Regeneration
Author: Jorge L. Alió
Publisher: Springer
Total Pages: 510
Release: 2019-02-20
Genre: Medical
ISBN: 3030013049

This text provides expert instruction on the varying surgical techniques currently employed for the regeneration of the ocular surface. Corneal Regeneration: Therapy and Surgery begins with a thorough discussion of current research based on data obtained in clinical human studies, and discusses the potential clinical implications for this promising new stage of eye surgery. Sections devoted to the stem cell, regenerative surgery and therapy of the ocular surface epithelium, corneal stroma, and corneal endothelium follow, each section comprehensively covering applied anatomy, current therapy and regenerative techniques, with a look to future directions of the field including eventual cell therapy. Corneal Regeneration: Therapy and Surgery is the first book of its kind, systematically covering the developments the medical community has achieved in corneal regeneration from all angles. Written and edited by leading experts in the field, researchers and ophthalmologists alike will find this to be a unique source of information on corneal regeneration, as well as a thoughtful reflection on potential applications of regenerative surgery in ophthalmology as a whole.

Immunology, Inflammation and Diseases of the Eye

Immunology, Inflammation and Diseases of the Eye
Author: Darlene A. Dartt
Publisher: Academic Press
Total Pages: 451
Release: 2011-02-26
Genre: Medical
ISBN: 012381975X

This selection of articles from the Encyclopedia of the Eye provides a comprehensive overview of immunological features, diseases and inflammation of the eye and its support structures and organs. Rather than taking an immunological focus that is strictly suitable for clinicians, the volume offers a considerable basic science background and addresses a broad range of topics - the immune system of the eye, its various disorders, mechanisms of inflammation of the eye and visual system, treatment, wound healing mechanisms, stem cells, and more. - The first single volume to integrate comparative studies into a comprehensive resource on the neuroscience of ocular immunology - Chapters are carefully selected from the Encyclopedia of the Eye by the world's leading vision researchers - The best researchers in the field provide their conclusions in the context of the latest experimental results

Churchill's Pocketbook of Diabetes E-Book

Churchill's Pocketbook of Diabetes E-Book
Author: Sujoy Ghosh
Publisher: Elsevier Health Sciences
Total Pages: 343
Release: 2012-07-16
Genre: Medical
ISBN: 1455742112

The incidence of diabetes is increasing at epidemic proportions worldwide, presenting a huge challenge to modern medicine. In response, scientific advances in the understanding of diabetes and its complications are being translated into improved clinical practice at ever faster rates. Greater understanding of aetiopathogenesis of the different types of diabetes, the emerging roles of novel pharmacological agents and the importance placed on multidisciplinary team working and multi-risk-factor treatment all contribute to this. Now in a fully revised second edition, this clear, concise guide to modern diabetes and its management will prove invaluable to all health professionals in this field. Suitable for instant reference in the clinic or office. Helps answer the questions which diabetic patients will direct at their carers about their disease, its causes, prognosis and consequences for their lifestyle. Offers practical and accessible advice on all aspects of the condition from presentation and diagnosis to organisation of care. Suitable for diabetic nurses as well as junior doctors. Evidence based boxes give the rationale behind treatment decisions. Colour illustrations of important conditions such as diabetic retinopathy and foot disease. Key points highlighted throughout the book, vital/high risk points emphasized with exclamation mark icon. More information on insulin therapy, dyslipidaemia, macrovascular disease and hypertension. Complete rewrite of oral antidiabetic agents section. Smaller, more pocketable page size.

Tumor Vascularization

Tumor Vascularization
Author: Domenico Ribatti
Publisher: Academic Press
Total Pages: 198
Release: 2020-01-07
Genre: Science
ISBN: 0128194944

Tumor Vascularization discusses the different types of growth of tumor blood vessels and their implications on research and healthcare. The book is divided into three parts: the first one, General Mechanisms, discusses different vessel growth mechanisms, such as sprouting angiogenesis, non-angiogenesis dependent growth, intussusceptive microvascular growth, vascular co-option and vasculogenic mimicry. The second and third parts, entitled Clinical Implications and Therapeutic Implications are dedicated to translating recent findings in this field to patient treatment and healthcare. This book is a valuable source for cancer researchers, oncologists, graduate students and members of the biomedical field who are interested in tumor progression and blood vessels.