1,720,984 research outputs found
Low effectiveness of DNA vaccination against HER-2/neu in ageing
No full textWe evaluated the effectiveness of vaccination with a HER-2/neu DNA plasmid to induce protective immunity against HER-2/neu overexpressing syngeneic TUBO tumour cells in old ages. Young and old Balb/c mice received three immunizations with a pCMVneuNT DNA plasmid and, successively, were challenged with TUBO cells. Young mice were completely protected whereas less than 60% protection was observed in old mice. Anti-p185neu antibodies were found in the sera from both young and old immunized mice, even if antibody production was significantly higher in young in comparison with old mice. Similarly, higher anti-p185neu lymphocyte proliferation was induced in young than in old mice. No anti-p185neu cytotoxicity was found in lymphocytes from old animals. We conclude that anticancer DNA vaccination has a lower effectiveness in old than in young ages
Synthesis and characterization of new synthetic vectors of DNA for human gene therapy applications
No full textXXXIII Convegno Nazionale della Divisione di Chimica Organica Società Chimica Italiana, San Benedetto del Tronto, Italy
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Evaluation of different plasmid DNA delivery system for immunization against HER2/neu in a transgenic murine model of mammary carcinoma
Full text linkStudies of DNA vaccination against HER2/neu showed the effectiveness of immunization protocols in models of transplantable or spontaneous tumors; scarce information, however, has been provided to identify the procedure of DNA administration that more effectively contributes to the activation of immune system against spontaneously arising HER2/neu-positive tumors. We compared the effectiveness of different procedures of DNA vaccine delivery (intradermic injection (ID), gene gun (GG) delivery and intramuscular injection (IM) alone or with electroporation) in a murine transgenic model of mammary carcinoma overexpressing HER2/neu. We highlighted the role of DNA delivery system in the success of DNA vaccination showing that, among the analysed methods, intramuscular injection of the vaccine, particularly when associated to electroporation, elicits a better protection against HER2/neu spontaneous tumor development inducing antibody and cell-mediated immune responsiveness against HER2/neu and a ThI polarization of the immune response
Binding of feline immunodeficency viral gag-p24 polypepdide to non immune Igs
No full textAvailable data on the existence of lentivirus proteins with properties of unconventional Ag for B cells, have been so far restricted to human immunodeficiency virus (i.e. gp-120 of HIV-I). By using biotinylated-MAbs-anti-biotin IgG as readout system, we now report that gag-p24 antigen, either assembled in feline immunodeficiency virus (FIV) particles or expressed as recombinant polypeptide (rec.p24) may bind to nonimmune IgGs purified from mouse or cat sera. Moreover, FACS scanning experiments are consistent with the possibility that rec.p24 interacts with surface-Ig in a sub-population (5-6%) of rodent B cells. We hypothesize that gag-p24 peptide encoded regions may bind to unconventional Ig sites or, alternatively, that they may represent 'public' epitopes for natural polyreactive antibody
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