In vitro immune response of primed mouse spleen cells as affected by the time of antigenic stimulation

1970 ◽  
Vol 76 (1) ◽  
pp. 3-6
Author(s):  
H. K. Meiss ◽  
G. Agarossi ◽  
M. Martinozzi ◽  
G. Doria
Keyword(s):  
Immune Response ◽  
Antigenic Stimulation ◽  
Mouse Spleen ◽  
Spleen Cells ◽  
In Vitro Immune Response ◽  
Primed Mouse

scholarly journals ANTIBODY-MEDIATED SUPPRESSION OF THE IMMUNE RESPONSE IN VITRO

1970 ◽  
Vol 131 (2) ◽  
pp. 247-274 ◽  
Author(s):  
Marc Feldmann ◽  
Erwin Diener
Keyword(s):  
Immune Response ◽  
Immune Suppression ◽  
Serum Antibody ◽  
Cellular Level ◽  
Mouse Spleen ◽  
Spleen Cells ◽  
Normal Response ◽  
In Vitro Immune Response ◽  
Immune Response In Vitro

Antibody-mediated suppression of the in vitro immune response to polymerized flagellin of Salmonella adelaide and to sheep erythrocytes was studied at the cellular level. Normal mouse spleen cells, preincubated in vitro with mixtures of antigen and antibody for short periods of time before being washed, did not respond to an optimal antigenic challenge in vitro, whereas similar cells treated with antibody alone gave a normal response. The degree of immune suppression was found to depend on the time of preincubation. Significant immune suppression could be induced in as short a time as 15 min, whereas profound suppression (90%) required the incubation of cells with mixtures of antigen and antibody for 4–6 hr. Mouse spleen cells treated similarly were also unable to respond subsequently to the antigen upon transfer to lethally irradiated hosts, as measured at both the level of the antigen-reactive cell and that of serum antibody production. These results were taken as evidence that in vitro an effect of antibody-mediated suppression occurred at the level of the immunocompetent cell. Similarities between immune tolerance and antibody-mediated suppression in vitro were described, and the significance of the findings discussed in the light of current concepts of the mechanism of antibody-mediated suppression.

scholarly journals Specific elimination of cytotoxic effector cells. I. Adsorptive behavior of effectors and their precursors and spleen cell monolayers.

1976 ◽  
Vol 144 (4) ◽  
pp. 996-1008 ◽  
Author(s):  
J R Neefe ◽  
D H Sachs
Keyword(s):  
Mouse Spleen ◽  
Spleen Cells ◽  
Effector Cells ◽  
Cell Monolayers ◽  
Specific Suppression ◽  
Normal Spleen ◽  
Adsorptive Behavior ◽  
Cytotoxic Effector ◽  
Primed Mouse

Monolayers formed of normal mouse spleen cells attached to polystyrene coated with poly-L-lysine were tested for their ability to bind specifically antigen-reactive cells in normal or primed mouse spleen. 88 to greater than 98% of the activity of cytotoxic populations was removed by a single adsorption. However, normal spleen cells or spleen cells previously primed in vitro could not be depleted of their capacity to be sensitized, even when adsorption effectively removed all residual cytotoxic activity from the same previously primed population. In fact, exposure to an immunoadsorbent augmented the ultimate cytotoxicity generated in a nonspecific fashion. This augmentation was especially dramatic in the case of a previously primed population and may have reflected the removal of a nonspecific suppressor. If antigen-reactive precursors cannot be removed efficiently by adsorption, other approaches to the generation of tolerant lymphoid populations, such as specific suppression of precursor differentiation must be sought.

An in vitro model for induction of immunologic unresponsiveness to turkey γ-globulin in primed mouse spleen cells

1979 ◽  
Vol 42 (2) ◽  
pp. 258-269 ◽  
Author(s):  
Donna G. Sieckmann ◽  
Jacques M. Chiller ◽  
William O. Weigle
Keyword(s):  
In Vitro Model ◽  
Mouse Spleen ◽  
Spleen Cells ◽  
Vitro Model ◽  
Primed Mouse

scholarly journals DELETION OF HAPTEN-BINDING CELLS BY A HIGHLY RADIOACTIVE 125I CONJUGATE

1972 ◽  
Vol 136 (2) ◽  
pp. 305-317 ◽  
Author(s):  
Dov Theo Golan ◽  
Yves Borel
Keyword(s):  
Immune Response ◽  
Normal Mouse ◽  
Mouse Spleen ◽  
Spleen Cells ◽  
Protein Carrier

Exposure of normal mouse spleen cells in vitro to highly 125I-labeled dinitrophenyl (DNP)-protein carrier conjugates specifically inactivated cells able to mount an immune response to that hapten after in vivo challenge. The deletion was hapten specific and independent of the radioactive carrier to which the hapten was bound. DNP-binding cells were inactivated by radioactivity that was not part of the hapten, but was solely confined to the carrier moiety. The deletion of the anti-DNP response lasted 2–3 wk and could be specifically inhibited.

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