نتایج جستجو برای: isoimmunization
تعداد نتایج: 560 فیلتر نتایج به سال:
A component to the problem of inducing broad neutralizing HIV-1 gp41 membrane proximal external region (MPER) antibodies is the need to focus the antibody response to the transiently exposed MPER pre-hairpin intermediate neutralization epitope. Here we describe a HIV-1 envelope (Env) gp140 oligomer prime followed by MPER peptide-liposomes boost strategy for eliciting serum antibody responses in...
The loss of naïve T cells is a hallmark of immune aging. Although thymic involution is a primary driver of this naïve T cell loss, less is known about the contribution of other mechanisms to the depletion of naïve T cells in aging primates. We examined the role of homeostatic cycling and proliferative expansion in different T cell subsets of aging rhesus macaques (RM). BrdU incorporation and th...
The pharmacokinetics of trimetrexate was studied in Rhesus monkeys following i.v. bolus, continuous i.v. infusion, oral, and subcutaneous administration. Two methods were used to measure drug concentration in plasma, cerebrospinal fluid (CSF), and urine: the dihydrofolate reductase inhibition assay, and a reverse phase high-pressure liquid chromatography assay. The pharmacokinetic behavior of t...
BACKGROUND The decreased immune response among elderly individuals results in reduced influenza vaccine efficacy. Strategies to improve vaccine efficacy in elderly individuals are needed. The goal of this study was to determine whether a cationic lipid/DNA complex (CLDC) can improve the efficacy of the trivalent inactivated influenza vaccine Fluzone in elderly nonhuman primates. METHODS Elder...
Transplacental transfer of spiramycin was investigated in a rhesus monkey model to study whether the antibiotic reaches therapeutic levels in the fetus. Spiramycin concentrations were measured by bioassay and high-performance liquid chromatography. Pharmacokinetic parameters were determined for bioactive spiramycin as measured by the bioassay. Pharmacokinetic pilot studies showed that spiramyci...
AIM To design a protocol for non-invasive prenatal diagnosis of fetal Rhesus D (RhD) status. MATERIALS AND METHODS A total of 112 single lymphocytes were used to test the efficiency of the assay. The protocol was validated using blood samples from 84 RhD-negative pregnant women at 7-24 weeks of gestation. Cell-free DNA (cfDNA) was enzymatically digested using AciI and analyzed by a polymerase...
NK cells are crucial components of the innate immune system due to their capacity to exert rapid cytotoxic and immunomodulatory function in the absence of prior sensitization. NK cells can become activated by exposure to target cells and/or by cytokines produced by antigen-presenting cells. In this study, we examined the effects of a simian immunodeficiency virus (SIV) vaccine regimen and subse...
Analysis of rhesus macaque leukocytes disclosed the presence of an 18-residue macrocyclic, tridisulfide antibiotic peptide in granules of neutrophils and monocytes. The peptide, termed rhesus theta defensin-1 (RTD-1), is microbicidal for bacteria and fungi at low micromolar concentrations. Antibacterial activity of the cyclic peptide was threefold greater than that of an open-chain analog, and ...
In rhesus-negative women who have had previous babies severely affected by rhesus incompatibility, the maternal rhesus antibody titre during a subsequent pregnancy offers only a poor indication of the degree to which the developing foetus will be affected. This has induced workers to look for laboratory tests that can give more reliable information. In an attempt to detect excessive haemolysis ...
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