Conditions of differentiation of original memory cells and of enriched precursors of secondary cytotoxic T lymphocytes specific for the class I histocompatibility molecule

1990 ◽  
Vol 109 (3) ◽  
pp. 357-360 ◽  
Author(s):  
B. D. Brondz ◽  
T. V. Osipova ◽  
G. F. Aptikaeva ◽  
V. V. Kronin
Keyword(s):  
T Lymphocytes ◽  
Cytotoxic T Lymphocytes ◽  
Class I ◽  
Memory Cells

scholarly journals High frequency of cross-reactive cytotoxic T lymphocytes elicited during the virus-induced polyclonal cytotoxic T lymphocyte response.

1993 ◽  
Vol 177 (2) ◽  
pp. 317-327 ◽  
Author(s):  
S R Nahill ◽  
R M Welsh
Keyword(s):  
T Lymphocytes ◽  
Virus Infection ◽  
Cytotoxic T Lymphocytes ◽  
High Frequency ◽  
Class Ii ◽  
Class I ◽  
Direct Stimulation ◽  
Ctl Response ◽  
Cd4 Cell ◽  
Stimulation Of

Polyclonal stimulation of CD8+ cytotoxic T lymphocytes (CTL) occurs during infection with many viruses including those not known to transform CTL or encode superantigens. This polyclonal CTL response includes the generation of high levels of allospecific CTL directed against many class I haplotypes. In this report we investigated whether the allospecific CTL generated during an acute lymphocytic choriomeningitis virus (LCMV) infection of C57BL/6 mice were stimulated specifically by antigen recognition or nonspecifically by polyclonal mechanisms possibly involving lymphokines or superantigens. An examination of the ability of different strains of mice to induce high levels of CTL specific for a given alloantigen showed that most, but not all, strains generated high levels of allospecific CTL, and that their abilities to generate them mapped genetically to the major histocompatibility complex locus, exclusive of the class II region. This indicated that the virus-induced allospecific CTL generation was independent of the class II allotype, and mice depleted of CD4+ cells generated allospecific CTL, indicating independence of class II-CD4+ cell interactions and resulting CD4+ cell-secreted lymphokines. FACS staining with a variety of V beta-binding antibodies did not show a superantigen-like depletion or enrichment of any tested V beta + subset during infection. Several experiments provided evidence in support of direct stimulation of CD8+ cells via the T cell receptor: (a) both virus- and allo-specific killing were enriched within a given V beta subpopulation; (b) relative CTL precursor frequencies against different class I alloantigens changed during the course of virus infection; (c) the relative levels of virus-induced, allospecific CTL-mediated lysis at day 8 after infection did not parallel the CTL precursor frequencies before infection; and (d) limiting dilution analyses of day 8 LCMV-infected spleen cells stimulated by virus-infected syngeneic peritoneal exudate cells (PEC) revealed not only the expected virus-specific CTL clones, but also a high frequency of clones that were cross-reactive with allogeneic and virus-infected syngeneic targets. In addition to the virus cross-reactive allospecific CTL clones, virus-infected PEC also stimulated the generation of some allospecific clones that did not lyse virus-infected fibroblasts. Surprisingly, LCMV-infected PEC were much more efficient at stimulating allospecific CTL clones from day 8 LCMV-infected splenocytes than were allogeneic stimulators. These results indicate that at least part of the polyclonal allospecific CTL response elicited by acute virus infection is a consequence of the selective expansion of many clones of allospecific CTL which cross-react with virus-infected cells.(ABSTRACT TRUNCATED AT 400 WORDS)

scholarly journals Detection of major histocompatibility complex class I-restricted, HIV- specific cytotoxic T lymphocytes in the blood of infected hemophiliacs

Blood ◽  
1989 ◽  
Vol 73 (7) ◽  
pp. 1909-1914 ◽  
Author(s):  
RA Koup ◽  
JL Sullivan ◽  
PH Levine ◽  
D Brettler ◽  
A Mahr ◽  
...  
Keyword(s):  
T Lymphocytes ◽  
Mhc Class I ◽  
Cytotoxic T Lymphocytes ◽  
Mononuclear Cells ◽  
Nk Cell ◽  
Class I ◽  
Gene Products ◽  
Major Histocompatibility ◽  
Peripheral Blood Mononuclear ◽  
Hiv 1

Abstract Major histocompatibility (MHC)-restricted, human immunodeficiency virus type one (HIV-1)-specific, cytotoxic T lymphocytes (CTLs) were detected in the peripheral blood mononuclear cells (PBMCs) of HIV-1-infected individuals. Using a system of autologous B and T lymphoblastoid cell lines infected with recombinant vaccinia vectors (VVs) expressing HIV-1 gene products, we were able to detect HIV-1-specific cytolytic responses in the PBMCs of 88% of HIV-1-seropositive hemophiliac patients in the absence of in vitro stimulation. These cytolytic responses were directed against both HIV-1 envelope and gag gene products. The responses were resistant to natural killer (NK) cell depletion and were inhibited by monoclonal antibodies (MoAbs) to the T cell receptor, CD8 surface antigens, and MHC class I antigens, suggesting a classical MHC class I restricted, virus-specific CTL response.

scholarly journals Higher human lymphocyte antigen class I expression in early‐stage cancer cells leads to high sensitivity for cytotoxic T lymphocytes

2019 ◽  
Vol 110 (6) ◽  
pp. 1842-1852 ◽  
Author(s):  
Yu Akazawa ◽  
Daisuke Nobuoka ◽  
Mari Takahashi ◽  
Toshiaki Yoshikawa ◽  
Manami Shimomura ◽  
...  
Keyword(s):  
T Lymphocytes ◽  
Cancer Cells ◽  
Cytotoxic T Lymphocytes ◽  
Human Lymphocyte ◽  
Early Stage ◽  
High Sensitivity ◽  
Class I ◽  
Early Stage Cancer ◽  
Lymphocyte Antigen ◽  
Human Lymphocyte Antigen
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