نتایج جستجو برای: immunity reactions
تعداد نتایج: 248183 فیلتر نتایج به سال:
Evidence is presented which reinforces the complexity of the host-parasite interaction during the course of syphilis. Infection with Treponema pallidum evokes a complicated antibody response and an assortment of cell-mediated immune reactions in the host. It appears that humoral immunity plays a minor role towards the complete elimination of syphilitic infection while the cellular limb of the i...
In this paper, some evidence, exper imental or clinical, is presented on the fol lowing subjects : ( I ) The infectious power of a living, sensitized vaccine; (2 ) the absence of immuni ty in vaccinated rabbits to direct gall bladder infect ions; (3 ) the relative pathogenicity, virulence, and toxic i ty of the strain used in the A r m y vaccine; (4 ) local vaccine reactions a f te r typhoid fe...
Autosensitization of rat or mouse lymphoid cells against syngeneic fibroblast antigens was induced in cell culture. Rat lymphoid cells autosensitized by this method were able to produce immunospecific lysis of syngeneic target fibroblasts in vitro or GvH reactions in newborn rats. Autosensitized mouse spleen cells mediated similar GvH reactions when injected into newborn mice. The nature of the...
Glucocorticoid hormones are widely used clinically to suppress the rejection of transplanted organs, a reaction in which lymphocyte-mediated cellular immunity, rather than antibodies, is thought to play an important role (1), Cellular immune reactions may be divided into at least two major phases. The first phase is considered to be the inductive or sensitization phase which involves antigenind...
objective: some evidence suggests that chronic uptake of estragole and methyl-eugenol, found in the essential oil of artemisia dracunculus (tarragon), may be associated with an increased risk of hepato-carcinogenicity. the present study was conducted to investigate the immumodulatory and anti-inflammatory potentials of estragole and methyl-eugenol free extract of tarragon. materials and methods...
INTRODUCTION Plasmodium falciparum induced antibodies are key components of anti-malarial immunity in malaria endemic areas, but their antigen targets can be polymorphic. Induction of a high proportion of strain-specific antibodies will limit the recognition of a broad diversity of parasite strains by these responses. There are indications that circulating parasite diversity varies with malaria...
Intestinal homeostasis relies on a continuous dialogue between the commensal bacteria and the immune system. Natural killer T (NKT) cells, which recognize CD1d-restricted microbial lipids and self-lipids, contribute to the regulation of mucosal immunity, yet the mechanisms underlying their functions remain poorly understood. Here, we demonstrate that NKT cells respond to intestinal lipids and C...
The generation of tumor-specific T cells is hampered by the presentation of poorly immunogenic tumor-specific epitopes by the tumor. Here, we demonstrate that, although CD8+ T cells specific for the self/tumor Ag tyrosinase-related protein 2 (TRP2) are readily detected in tumor-bearing hosts, vaccination of either tumor-bearing or naive mice with an epitope derived from TRP2 fails to generate s...
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