Track topics on Twitter Track topics that are important to you
DNA vaccines consist of small pieces of DNA also known as plasmids, and have several potential advantages over traditional vaccines. Thus far, DNA vaccines appear to be well tolerated in humans. The investigators have developed a DNA vaccine, VGX-3400X, which includes plasmids targeting the proteins of the H5N1 avian influenza virus. The vaccine will be delivered via electroporation (EP) which uses the CELLECTRA constant current device to deliver a small electric charge following injection, since animal studies have shown that this delivery method increases the immune response to vaccine. The vaccine will be given to 30 healthy adult subjects. It is hypothesized that VGX-3400X + EP will be well tolerated and immunogenic.
The use of DNA plasmids containing genes that express viral antigens may be a promising way to formulate a vaccine that can effectively prevent infection and disease caused by the H5N1 avian influenza virus. Plasmid vectors are simple to construct and are easy to manufacture at a relatively low cost. Vaccination with plasmids that express influenza proteins should induce the development of serum antibodies and might also induce significant quantities of secretory IgA antibodies and/or CMI. The DNA sequences included in the vaccine could also result in the proliferation of T lymphocytes that could broaden the effectiveness of the vaccine to include variant strains of H5N1 with antigenically modified HA (i.e., drifted strains).
Electroporation (EP) is a technology in which a transmembrane electrical field is applied to increase the permeability of cell membranes to create microscopic pathways (pores) and thereby enhance the uptake of drugs, vaccines, or other agents into target cells. Their presence allows macromolecules, ions, and water to pass from one side of the membrane to the other. The presence of a constant field influences the kinetics of directional translocation of the macromolecular plasmid, such that the plasmid delivery in vivo has been sufficient to achieve physiological levels of secreted proteins. IM injection of plasmid followed by EP has been used very successfully to deliver therapeutic genes that encode for a variety of hormones, cytokines, or enzymes in a variety of species. EP is currently being used in humans to deliver cancer vaccines and therapeutics as well as in gene therapy. The expression levels are increased by as much as 3 orders of magnitude over plasmid injection alone.
The use of EP via the CELLECTRA® device should increase the expression of H5N1 influenza virus genes in the VGX-3400X DNA vaccine.
Allocation: Non-Randomized, Control: Active Control, Endpoint Classification: Safety Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Prevention
Vince & Associates
Published on BioPortfolio: 2014-08-27T03:12:57-0400
Healthy Together is a program that promotes the achievement and maintenance of healthy weights in children and their families.
Investigators conducted a pilot feasibility and acceptability randomized controlled trial of a remotely delivered behavioral health coaching program in pregnancy and postpartum.
Absorption, distribution, metabolism, and excretion (ADME) study with 14C in healthy young men.
The purpose of this study is to understand how consuming healthy cookies every day for two weeks will affect different types of fat in the blood. Specifically, the overall goal of this stu...
To assess the safety, tolerability, pharmacokinetics, and pharmacodynamics of IMA-026 administered subcutaneously (SC) or intravenously (IV) in healthy adults.
Using an operational continuum of healthy aging developed by U.S. researchers, we sought to estimate the prevalence of healthy aging among older Spaniards, inform the development of a definition of he...
The American Nurses Association declared 2017 the Year of the Healthy Nurse. In an effort to promote a healthy academic environment, faculty and staff in institutions of higher learning should serve a...
Across Ontario, the Healthy Babies Healthy Children (HBHC) postpartum screening tool is routinely used to identify families with potential risk of negative development outcomes for children.
Sequence-specific learning (SSL); the ability to implicitly integrate repeated sequences compared to random sequences during a motor sequence paradigm, is impaired in healthy elders (HE) compared to h...
Few studies have recommended the essential domains of healthy aging and their relevant measurement to assess healthy aging comprehensively. This review is to fill the gap, by conducting a literature r...
Healthy People Programs are a set of health objectives to be used by governments, communities, professional organizations, and others to help develop programs to improve health. It builds on initiatives pursued over the past two decades beginning with the 1979 Surgeon General's Report, Healthy People, Healthy People 2000: National Health Promotion and Disease Prevention Objectives, and Healthy People 2010. These established national health objectives and served as the basis for the development of state and community plans. These are administered by the Office of Disease Prevention and Health Promotion (ODPHP). Similar programs are conducted by other national governments.
Governmental guidelines and objectives pertaining to public food supply and nutrition including recommendations for healthy diet and changes in food habits to ensure healthy diet.
Surgical reinnervation of a denervated peripheral target using a healthy donor nerve and/or its proximal stump. The direct connection is usually made to a healthy postlesional distal portion of a non-functioning nerve or implanted directly into denervated muscle or insensitive skin. Nerve sprouts will grow from the transferred nerve into the denervated elements and establish contact between them and the neurons that formerly controlled another area.
Process of evaluating the health of a patient and determining if they are healthy enough for surgery.
Dietary patterns which have been found to be important in reducing disease risk.
Bioinformatics is the application of computer software and hardware to the management of biological data to create useful information. Computers are used to gather, store, analyze and integrate biological and genetic information which can then be applied...
DNA sequencing is the process of determining the precise order of nucleotides within a DNA molecule. During DNA sequencing, the bases of a small fragment of DNA are sequentially identified from signals emitted as each fragment is re-synthesized from a ...
A vaccine is a biological preparation that improves immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing microorganism, and is often made from weakened or killed forms of the microbe, its toxins or one ...