Supporting Biomedical Research Training for Historically Underrepresented Undergraduates Using Interprofessional, Nonformal Education Structures.

Research experience provides critical training for new biomedical research scientists. Students from underrepresented populations studying science, technology, engineering, and mathematics (STEM) are increasingly recruited into research pathways to diversify STEM fields. However, support structures outside of research settings designed to help these students navigate biomedical research pathways are not always available; nor are program support components outside the context of laboratory technical skills training and formal mentorship well understood.

Plasmid DNA delivery by D-alanine-deficient Listeria monocytogenes.

Optimal DNA vaccine efficacy requires circumventing several obstacles, including low immunogenicity, a need for adjuvant, and the costs of purifying injection grade plasmid DNA. Bacterial delivery of plasmid DNA may provide an efficient and low-cost alternative to plasmid purification and injection. Also, the bacterial vector may exhibit potential as an immune adjuvant in vivo.

Gene transfer to fish cells by attenuated invasive Escherichia coli.

Genetic immunization has proved effective in a number of applications including vaccination of rainbow trout (Oncorhynchus mykiss) against the fish pathogen infectious hematopoietic necrosis virus. However, injection vaccines, especially in aquaculture, are not as desirable as oral or immersion dosing schemes. In this report we present evidence that attenuated invasive Escherichia coli can infect and deliver plasmid DNA to salmonid fish cells.

DNA vaccination protects mice against challenge with Listeria monocytogenes expressing the hepatitis C virus NS3 protein.

The goal of this study was to develop a new surrogate challenge model for use in evaluating protective cell-mediated immune responses against hepatitis C virus (HCV) antigens. The use of recombinant Listeria monocytogenes organisms which express HCV antigens provides novel tools with which to assay such in vivo protection, as expression of immunity against this hepatotropic bacterial pathogen is dependent on antigen-specific CD8(+) T lymphocytes. A plasmid DNA vaccine encoding a ubiquitin-NS3 fusion protein was generated, and its efficacy was confirmed by in vivo induction of NS3-specific, gamma interferon-secreting T cells following vaccination of BALB/c mice.