Migratory patterns of B lymphocytes. IV. Effect of anti-Ig on follicular localization of radioactively labeled murine spleen and bone marrow cells

Lymphocyte homing

The phenomenon of "homing" is discussed with respect to patterns of lymphocyte circulation and the molecules on the surface of both endothelium and lymphocytes that mediate this process. In addition, the data are analysed in the context of a model for lymphocyte homing.

Differential sensitivity of memory cell subpopulations to anti-immunoglobulin and complement

Evidence is presented for the unique sensitivity of memory cells bearing surface immunoglobulin G1 (IgG1) to functional elimination with anti-immunoglobulin (anti-Ig) sera and complement (C). Treatment of cells for adoptive transfer with C and anti-gamma1, anti-kappa, or anti-Ig significantly reduces the number of plaque-forming cells (PFC) of only the IgG1 isotype found in adoptive recipients. An increase in PFC of other isotypes accompanies the decrease in IgG1 PFC; there is no net change in the total PFC response. The depletion of IgG1 PFC requires treatment of transferred cells with both specific antisera and C; antisera directed against other isotypes show no significant effects. The maintenance of the magnitude of PFC response, compensation, is discussed.