Search results for "Immune System"

Effect of the host plant on the immunity of a phytophagous insect : influence of grape variety on the ability of the European grapevine moth to defen…

2013

In tritrophic interactions involving phytophagous insects, host plants and natural enemies, trophic levels are highly dependent on each other. Host plant may strongly affect directly phytophagous insect and indirectly natural enemies growing on these phytophagous insects. When a natural enemy attacks a phytophagous insect, the host immune system constitutes the last chance for the host to survive to an infection. A great variation of insect immune system is generally found in populations for susceptibility to pathogens, suggesting that variable selection pressures may have shaped and driven adaptation of immune traits. This project aims to determine the influence of both host plant and natu…

Specificity and Restriction of T Cells in a System of Complementing Ir Genes

1983

The phenomenon of Ir gene control of immune responsiveness is intimately related to the fact that antigen-specific stimulation of T cells with the Lyt-1 surface phenotype requires the simultaneous recognition of both external antigen and Ia antigen on the surface of antigen-presenting cells. There is increasing evidence indicating that Ia antigens encoded for by the I-A and I-E/C subregions of the H-2 complex represent the products of Ir genes.

ATTEMPTS TO ISOLATE C'3 ACTIVITY FROM PIG SERUM.

1965

Gli autori descrivono un metodo per l'isolamento del terzo componente del complemento dal siero di maiale, basato sulla possibilita di provocare, per aggiunta di lisozima, passaggio in soluzione del C′3 precipitato insieme ad altre proteine in seguito all'aggiunta di opportune quantita di « Liquoid » al siero.

Development of T cell clones reactive to two defined restriction elements in conjunction with two defined epitopes of antigen

1985

A previously described pig insulin (PI)-specific T cell line of (B10 X B10.BR)F1 origin was assayed for its reactivity with species variants of insulin in the presence of antigen-presenting cells (APC) of various H-2 haplotypes. In addition to its reactivity with PI and bovine insulin (BI) in the context of syngeneic F1 (H-2b X k)-APC, a weak cross-reactivity was observed with parental B10 (H-2b)-APC and BI but not PI. The cross-reactive cells could be selected out by several restimulations with the combination of BI and B10-APC. From the resulting, strongly cross-reactive T cell line several interleukin 2-dependent sublines were developed which did not require antigen-specific restimulatio…

A fully synthetic vaccine consisting of a tumor-associated glycopeptide antigen and a T-cell epitope for the induction of a highly specific humoral i…

2005

A Synthetic Vaccine Consisting of a Tumor-Associated Sialyl-TN-MUC1 Tandem-Repeat Glycopeptide and Tetanus Toxoid: Induction of a Strong and Highly S…

2009

Synthesis and biological evaluation of a novel MUC1 glycopeptide conjugate vaccine candidate comprising a 4’-deoxy-4’-fluoro-Thomsen–Friedenreich epi…

2015

The development of selective anticancer vaccines that provide enhanced protection against tumor recurrence and metastasis has been the subject of intense research in the scientific community. The tumor-associated glycoprotein MUC1 represents a well-established target for cancer immunotherapy and has been used for the construction of various synthetic vaccine candidates. However, many of these vaccine prototypes suffer from an inherent low immunogenicity and are susceptible to rapid in vivo degradation. To overcome these drawbacks, novel fluorinated MUC1 glycopeptide-BSA/TTox conjugate vaccines have been prepared. Immunization of mice with the 4’F-TF-MUC1-TTox conjugate resulted in strong im…

Autoimmunity to the p53 protein is a feature of systemic lupus erythematosus (SLE) related to anti-DNA antibodies.

2001

The induction of anti-DNA autoantibodies in systemic lupus erythematosus (SLE) patients is problematic because mammalian DNA is poorly immunogenic at best. Here we demonstrate a chain of connected antibodies in SLE patient sera that could account for the induction of anti-DNA antibody, and possibly for some of the pathogenic features of SLE. We now report that SLE patients, in addition to anti-DNA, produce antibodies to the carboxy-terminal domain of the tumour suppressor molecule p53; this p53 domain recognizes damaged DNA. Hence, these anti-p53 antibodies could mimic damaged DNA immunologically. Indeed, SLE sera do contain anti-idiotypic antibodies to a prototypic anti-p53 antibody. Moreo…

Autoreactivity to mouse C1q in a murine model of SLE.

1995

A large proportion of systemic lupus erythematosus (SLE) patients develop glomerulonephritis, coincident with the appearance of autoantibodies to C1q, the Fc-recognizing collagen-like subcomponent of the first component of complement, C1. The MRL/lpr/lpr mouse is an established model for SLE, developing both antinuclear and anti-type II collagen autoantibodies, and rheumatoid factors(s), exhibiting reduced complement levels and later on developing glomerulonephritis and often arthritis. We report here an age-dependent decrease in serum C1q levels coincident with the development of IgG2b autoantibodies reactive with mouse C1q in MRL/lpr/lpr mice. Unlike IgG2b, although high levels of IgM, Ig…

Beryllium-induced disturbances of the murine immune system reflect some phenomena observed in sarcoidosis.

1994

Sarcoidosis is a systemic granulomatous disorder of unknown origin. In respect to clinical and immunological characteristics, it is indistinguishable from berylliosis. As an approach to develop a murine model reflecting some aspects of sarcoidosis, we attempted to induce berylliosis in mice by treating inbred F1 mice (C57B16 x DBA/2) with 3 mg beryllium sulfate (BeSO4) per kg body weight intraperitoneally. Either pure BeSO4 or BeSO4 in combination with incomplete Freund's adjuvant was administered. Alternatively, pure BeSO4 was injected 2 days after a single application of cyclophosphamide (150 mg/kg). The spleen index, the spontaneous and phorbolmyristate acetate (PMA)-induced radical oxyg…