Approaches To Blocking The Immune Response To Gene Transfer With Viral Vectors

Viral vectors are superior tools for gene therapy and as a genetic vaccine platform because viruses have evolved to efficiently infect and transfer their genomes to cells. Several impressive successes in viral vector-based gene therapies have been reported in humans, including restoration of vision in patients with Leber’s congenital amaurosis by retinal gene transfer and cures for severe immune deficiencies by gene transfer to hematopoietic stem cells. However, the mammalian immune system has evolved in parallel to fend off invading pathogens such as viruses. Innate and antigen-specific adaptive immune responses against viral vectors and therapeutic transgene products pose serious hurdles for successful gene therapy. Pre-existing immunity in humans, resulting from prior exposure to the parent virus that forms the basis for the gene transfer vehicle may be derived from, often prevents efficient gene transfer. This problem also reduces our ability to use certain vectors for genetic vaccination or in anti-cancer therapy. For these reasons, the gene transfer community has been extensively studying the mechanisms of immune responses against viral vectors and has started to develop strategies and protocols to block or circumvent such responses. Choice, design and engineering of a vector as well as the route of administration/target tissue can be optimized/ altered to minimize immune responses or evade pre-existing immunity. Immune suppression and modulation strategies are being developed in order to minimize inflammation, prevent antibody or T cell responses against vectors, and to promote tolerance to therapeutic gene products. Combinations of these approaches will likely facilitate clinical applications of gene therapy for many target diseases and also aid in vaccine development.

Adenoviral Vectors for Gene Therapy, Second Edition provides detailed, comprehensive coverage of the gene delivery vehicles that are based on the adenovirus that is emerging as an important tool in gene therapy. These exciting new therapeutic agents have great potential for the treatment of disease, making gene therapy a fast-growing field for research. This book presents topics ranging from the basic biology of adenoviruses, through the construction and purification of adenoviral vectors, cutting-edge vectorology, and the use of adenoviral vectors in preclinical animal models, with final consideration of the regulatory issues surrounding human clinical gene therapy trials. This broad scope of information provides a solid overview of the field, allowing the reader to gain a complete understanding of the development and use of adenoviral vectors. Provides complete coverage of the basic biology of adenoviruses, as well as their construction, propagation, and purification of adenoviral vectors Introduces common strategies for the development of adenoviral vectors, along with cutting-edge methods for their improvement Demonstrates noninvasive imaging of adenovirus-mediated gene transfer Discusses utility of adenoviral vectors in animal disease models Considers Federal Drug Administration regulations for human clinical trials

Gene Therapy for Viral Infections provides a comprehensive review of the broader field of nucleic acid and its use in treating viral infections. The text bridges the gap between basic science and important clinical applications of the technology, providing a systematic, integrated review of the advances in nucleic acid-based antiviral drugs and the potential advantages of new technologies over current treatment options. Coverage begins with the fundamentals, exploring varying topics, including harnessing RNAi to silence viral gene expression, antiviral gene editing, viral gene therapy vectors, and non-viral vectors. Subsequent sections include detailed coverage of the developing use of gene therapy for the treatment of specific infections, the principles of rational design of antivirals, and the hurdles that currently face the further advancement of gene therapy technology. Provides coverage of gene therapy for a variety of infections, including HBV, HCV, HIV, hemorrhagic fever viruses, and respiratory and other viral infections Bridges the gap between the basic science and the important medical applications of this technology Features a broad approach to the topic, including an essential overview and the applications of gene therapy, synthetic RNA, and other antiviral strategies that involve nucleic acid engineering Presents perspectives on the future use of nucleic acids as a novel class of antiviral drugs Arms the reader with the cutting-edge information needed to stay abreast of this developing field

During the past decades, with the introduction of the recombinant DNA, hybridoma and transgenic technologies there has been an exponential evolution in understanding the pathogenesis, diagnosis and treatment of a large number of human diseases. The technologies are evident with the development of cytokines and monoclonal antibodies as therapeutic agents and the techniques used in gene therapy. Immunopharmacology is that area of biomedical sciences where immunology, pharmacology and pathology overlap. It concerns the pharmacological approach to the immune response in physiological as well as pathological events. This goals and objectives of this textbook are to emphasize the developments in immunology and pharmacology as they relate to the modulation of immune response. The information includes the pharmacology of cytokines, monoclonal antibodies, mechanism of action of immune-suppressive agents and their relevance in tissue transplantation, therapeutic strategies for the treatment of AIDS and the techniques employed in gene therapy. The book is intended for health care professional students and graduate students in pharmacology and immunology.

This book presents a detailed overview of the development of new viral vector-based vaccines before discussing two major applications: preventive vaccines for infectious diseases and therapeutic cancer vaccines. Viral vector-based vaccines hold a great potential for development into successful pharmaceutical products and several examples at the advanced pre-clinical or clinical stage are presented. Nevertheless, the most efforts were focused on novel and very innovative technologies for new generation of vector-based vaccines. Furthermore, specific topics such as delivery and adjuvant and protection strategies for cell-mediated-based vaccines are presented. Given its scope, the book is a “must read” for all those involved in vaccine development, both in academia and industrial vaccine development.

The three sections of this volume present currently available cancer gene therapy techniques. Part I describes the various aspects of gene delivery. In Part II, the contributors discuss strategies and targets for the treatment of cancer. Finally, in Part III, experts discuss the difficulties inherent in bringing gene therapy treatment for cancer to the clinic. This book will prove valuable as the volume of preclinical and clinical data continues to increase.

On April 23 and 24, 2019 the Forum on Neuroscience and Nervous System Disorders convened a workshop titled "Advancing Gene-Targeted Therapies for Central Nervous System Disorders" in Washington, DC. This public workshop brought together experts and key stakeholders from academia, government, industry, philanthropic foundations, and disease/patient-focused nonprofit organizations to explore approaches for advancing the development of gene-targeted therapies for central nervous system (CNS) disorders, and implications of developing these therapies. Participants explored lessons learned from both successful and unsuccessful clinical development programs; new knowledge about the genetic underpinnings of brain disorders; the current status and future potential of gene-targeted therapies for CNS disorders; challenges and potential solutions for translating preclinical findings to approved therapies; and patient and caregiver perspectives. They also discussed what will be needed to develop these therapies for common disorders such as Alzheimer's and Parkinson's disease, as well as neuropsychiatric and neurodevelopmental disorders such as schizophrenia and autism. The workshop included approaches that target both DNA and RNA, as well as gene products using viral vectors, antisense oligonucleotides, and RNA interference. This publication summarizes the presentations and discussion of the workshop.

Now in four convenient volumes, Field’s Virology remains the most authoritative reference in this fast-changing field, providing definitive coverage of virology, including virus biology as well as replication and medical aspects of specific virus families. This volume of Field’s Virology: Emerging Viruses, 7th Edition covers recent changes in emerging viruses, providing new or extensively revised chapters that reflect these advances in this dynamic field.