Determinants of differential migration of mouse spleen cells treated with concanavalin A.
The effects of Con A on homing patterns of mouse spleen cells were investigated. After 1 to 18 hr incubation with or without the mitogen, cells were labeled with 51Cr and injected i.v. into syngeneic hosts. Treatment of spleen cells with Con A decreased localization in lymph nodes 75 to 95% and inhibited homing to recipient spleens 17 to 50%. Conversely, localization in liver and lungs was increased. Migration of cells labeled with both 125I-Con A and 51Cr revealed that cells binding the largest amount of Con A were trapped in lungs whereas cells migrating to lymph nodes and spleen had a much lower Con A content. Elution of Con A from lymphocyte surfaces with methyl-alpha-D-mannoside (MAM) reduced the percentage of cells localizing in lungs, with a concomitant increase in the percentage of cells migrating to lymph nodes. However, even after MAM treatment, a cell population with a relatively large Con A content localized in the lungs. These data indicate that both surface-bound Con A and Con A-induced changes in lymphocyte membranes inhibit migration of Con A-activated cells to recipient lymph nodes. They suggest that after Con A treatment lymph node-seeking cells do not migrate normally because of preferential sequestration in lungs of lymphocytes with either Con A-binding sites of increased density or avidity or with an increased propensity for Con A internalization.
D000818:Animals; D001665:Binding Sites; D002462:Cell Membrane / Q000276:immunology; D002465:Cell Movement; D002470:Cell Survival; D002860:Chromium Radioisotopes; D003208:Concanavalin A; D007106:Immune Sera; D007457:Iodine Radioisotopes; D008099:Liver / Q000166:cytology; D008168:Lung / Q000166:cytology; D008198:Lymph Nodes / Q000166:cytology; D008214:Lymphocytes / Q000276:immunology*; D008297:Male; D008766:Methylmannosides; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D011817:Rabbits / Q000276:immunology; D013154:Spleen / Q000166:cytology; D014915:Whole-Body Counting
D002860:Chromium Radioisotopes; D007106:Immune Sera; D007457:Iodine Radioisotopes; D008766:Methylmannosides; D003208:Concanavalin A