MACROMOLECULAR INHIBITORY FACTOR FOR LYMPHOID-CELLS PRODUCED BY MOUSE MACROPHAGES

  • 1 January 1977
    • journal article
    • research article
    • Vol. 33 (3), 391-398
Abstract
Supernatants of high density cultures of mouse peritoneal macrophages were inhibitory to homologous lymphoid cells in vitro by a number of parameters: proliferation and survival of [mouse L1210(A)] lymphoma cells was impaired, the immune response of spleen cells to sheep red cells and to concanavalin A (Con A) was decreased. Inhibition was due to a factor(s) with MW of .apprx. 110,000 as estimated by gel filtration. Activity was stable to heating at 56.degree. C, and was resistant to trypsin but not to pronase.