نتایج جستجو برای: b lymphocyte
تعداد نتایج: 941540 فیلتر نتایج به سال:
We have studied both in vitro and in vivo the formation of lymphocyte progenitors before blood circulation (day 9 of gestation) has started in the mouse embryo, and we have determined the tissue where this occurs. The results demonstrate that the yolk sac of embryos at day 8 and day 8.5 of gestation contains precursor cells that can give rise, in vivo and in vitro, to mature T and B lymphocytes...
erythropoietin (epo) was first known as a factor for red blood cell proliferation and differentiation. recent studies show the effects of epo on immune system. in this study the antihuman leukocyte antibody (anti-hla) titer were determined in five groups of rats, which had been sensitized with human lymphocyte. also, the effects of stimulation's frequency and dose of recombinant human eryt...
B lymphocytes produce diverse antibody specificities by "randomly" assembling antibody genes from germline segments. Yet, though each B lymphocyte has multiple allelic loci for the different antibody chains, each clonally derived mature B lymphocyte expresses a single species of antibody with a unique specificity via a process termed allelic exclusion. Despite some progress, the precise mechani...
Background: Thermal burn injuries impair the host defence system. Hence, in the present study, we aimed at investigating the changes in the number and phenotype of peripheral blood lymphocyte populations (T, B, and natural killer cells) and their subpopulations in patients with thermal burns and determining the relationships with different sizes of total body surface area (TBSA). ...
We have defined roles for the hemopoietic-specific Rho guanosine triphosphatase, Rac2, in B lymphocyte development and function through examination of rac2(-/-) mice. Rac2-deficient mice displayed peripheral blood B lymphocytosis and marked reductions in peritoneal cavity B-1a lymphocytes, marginal zone B lymphocytes, and IgM-secreting plasma cells as well as reduced concentrations of serum IgM...
Selective interference with the CD45RB isoform by mAb (anti-CD45RB) reliably induces donor-specific tolerance. Although previous studies suggest participation of regulatory T cells, a mechanistic understanding of anti-CD45RB-induced tolerance is lacking. We report herein the unexpected finding that tolerance induced by this agent is not established in B cell-deficient mice but can be recovered ...
The haematological profile and peripheral blood lymphocyte subpopulations of 36 patients with donovanosis were estimated by an indirect immunofluorescence technique using monoclonal antibodies. Concentrations of serum immunoglobulins (IgM, IgG, and IgA) were also estimated. The total leucocyte and lymphocyte counts were generally raised, as were total T lymphocyte, T4, and T8 counts. Patients w...
IFN-alpha inhibits B lymphocyte development, and the nuclear protein Daxx has been reported to be essential for this biological activity. We show in this study that IFN-alpha inhibits the clonal proliferation of B lymphocyte progenitors in response to IL-7 in wild-type, but not in tyk2-deficient, mice. In addition, the IFN-alpha-induced up-regulation and nuclear translocation of Daxx are comple...
thirty seven randomly selected patients suffering from multiple s c l e r os i s (ms) (17 males and 20 females)and 30 healthy control subjects were studied for the lymphocyte subpopulations and ce l l -medi a t e d immunity.we obs e r ved a decrease of the total t-cells and an increase of a ctive t-lymphocytes and b ce l l s , in ms p at i ent s as compared t o normal controls. the inability of...
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