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Gene therapy and gene transfer have recently been recognized as effective therapeutic tools to combat diseases. Accordingly, market demands for vectors and carriers to facilitate such interventions have surged in recent years. Retroviral vectors provide an efficient and safe means of gene transfer to eukaryotic cells. The present invention relates to genetic engineering involving retrovirus packaging cells that produce retroviral vectors.

The invention concerns immunotoxins and methods of using the immunotoxins for the treatment of autoimmune diseases and T cell malignancies. The immunotoxins are targeted via an antibody that is specific to T cells. This allows the specific ablation of malignant T cells and resting T cells. The transient ablation of resting T cells can "reset" the immune system by accentuating tolerizing responses. The toxin portion of the immunotoxin is genetically engineered to maintain bioactivity when recombinantly produced in Pichia pastoris.

The invention concerns immunotoxins and methods of using the immunotoxins for the treatment of rejection response in a patient, including graft-versus-host disease and transplantation of organs, tissues and cells into a host. In a specific embodiment of the invention, the transplant involves pancreatic islet cells. The immunotoxins are targeted via an antibody that is specific to T cells. This allows the specific ablation of resting T cells, resulting in an accentuation of immune tolerizing responses and an increased tolerance to transplants and grafts.

The present research tool is a knockout mouse model (FPR^-/-) that lacks the high affinity N-formylpeptide receptor (FPR), created by targeted gene disruption.

The invention concerns immunotoxins and methods of making the immunotoxins. Targeting of the immunotoxins occurs via an antibody that is specific to T cells. This allows the specific ablation of malignant T cells and resting T cells. The transient ablation of resting T cells can "reset" the immune system by accentuating tolerizing responses. As a result, the immunotoxin can be used to treat autoimmune disease, malignant T cell-related cancers, and graft-versus-host disease.

The disease burden associated with dengue virus infection has increased over the past several decades in the tropical and semi-tropical regions of the world, where over 2 billion people live at risk of dengue infection. Annually, there are an estimated fifty (50) to one hundred (100) million cases of dengue fever, making development of an effective vaccine a priority. In addition, there is a need for a "travelers vaccine" to protect those visiting dengue virus endemic areas, similar in scope to other currently available "travelers vaccines", such as hepatitis A vaccine.

Anthrax, whether resulting from natural or bioterrorist-associated exposure, is a constant threat to human health. The lethality of anthrax is primarily the result of the effects of anthrax toxin, which has 3 components: a receptor-binding protein known as "protective antigen" (PA) and 2 catalytic proteins known as "lethal factor" (LF) and "edema factor" (EF). Although production of an efficient anthrax vaccine is an ultimate goal, the benefits of vaccination can be expected only if a large proportion of the population at risk is immunized.

Concerns that variola (smallpox) virus might be used as a biological weapon have led to the recommendation of widespread vaccination with vaccinia virus. While vaccination is generally safe and effective for prevention of smallpox, it is well documented that various adverse reactions in individuals have been caused by vaccination with existing licensed vaccines. Vaccinia immune globulin (VIG) prepared from vaccinated humans has historically been used to treat adverse reactions arising from vaccinia immunization.

Over the past decade, Staphylococcus epidermidis has become the most prevalent pathogen involved in nosocomial infections. Usually an innocuous commensal microorganism on human skin, this member of the coagulase-negative group of staphylococci can cause severe infection after penetration of the epidermal protective barriers of the human body. In the U.S. alone, S. epidermidis infections on in-dwelling medical devices, which represent the main type of infection with S. epidermidis, cost the public health system approximately $1 billion per year. Importantly, S.

The development of sensitive and specific tests for JC virus and BK virus activity may provide tools essential in the steps required to find a treatment for these fatal infections. This invention describes a Recombinant Vpl protein (rVp1) that can be used 1) as an antigen source for ELISA assays 2) for studies of viral proteins in cells and 3) for the self assembly of icosahedral particles encapsidating DNA [gene expression of choice in range of up to 5.1kb size gene].