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Apoptosis of mature T cells may be an important pathophysiologic mechanism in diseases such as AIDS, cancer, and autoimmunity. In this study, in order to selectively protect T cells from dexamethasone (DEX)-induced apoptosis we constructed a fusion protein (anti-CD3sFv-IL-2) in which anti-CD3 single-chain Fv (sFv), the smallest unit of antibody recognizing the CD3 epsilon moiety of the T-cell receptor...
The balance of two types of T helper (Th) cells, Th1 and Th2 subsets, is important with respect to susceptibility or resistance to particular infections, or to autoimmune diseases and allergic diseases. To effectively induce Th1 immune responses in an antigen-specific manner, we constructed a mammalian expression plasmid (pOVA/IL-18) carrying a fusion gene in which the ovalbumin (OVA; a model antigen)...
To determine whether the paracrine secretion of interleukin-4 (IL-4) can efficiently induce T helper type 2 (Th2) cell-dominated immune response, BLK fibroblasts were stably transfected to secrete IL-4 (750 units/10 6 cells/48<space>h). Their effects on T helper cell-mediated immune response were investigated in ovalbumin (OVA)-primed C57BL/6 mice, and were compared with those of free...
Mouse fibroblasts (H-2 b ) were genetically engineered to express a costimulatory B7.1 and an interleukin-7 (IL-7; Fb/B7.1/IL7). The Fb/B7.1/IL7 cells were then pulsed with an ovalbumin (OVA) epitope (amino acids 257-264, SIINFEKL, H-2<space>K b restricted; Fb/B7.1/IL7/OVA) and tested for the induction of OVA-specific cytotoxic T lymphocytes (CTLs) in C57BL/6 mice (H-2 b...
To determine whether the paracrine secretion of interferon-γ (IFN-γ) can efficiently stimulate the resistance to Mycobacterium avium complex (MAC) infection, 3T3 fibroblasts were stably transduced to secrete IFN-γ (500 units/10 6 cells/48 h) and their effects on MAC infection were investigated in genetically susceptible BALB/c mice, compared with that of free recombinant IFN-γ (rIFN-γ). Immunization...
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