Surface antigens on mouse natural killer cells: use of monoclonal antibodies to inhibit or to enrich cytotoxic activity

J Immunol. 1981 Sep;127(3):982-6.

Abstract

In studies using monoclonal antibodies to cell-surface antigens we have identified 2 new antigens (H11 and 7.2) expressed on mouse NK cells. These are shared with T cells but not B cells. We have also shown that NK cells express T200 but lack detectable ThB or Lyt-1. The T200 and H11 surface molecules were implicated in the mediation or regulation of natural killing; monoclonal antibodies to T200 and H11 inhibited natural killing when added to the cytotoxicity assay but did not interfere with T cell cytotoxicity against the same target. The inhibitory effect of anti-T200 is consistent with recent evidence showing that antibodies to the Ly-5 polymorphic determinant on T200 block natural killing. The H11 determinants is on a different molecule. The absence of Lyt-1 and ThB on NK cells permitted development of a rapid and simple method for separating NK cells from T cells and B cells. Spleen cells incubated with rat monoclonal antibodies to Lyt-1 (on all T cells) and ThB (on all B cells) were 95% removed by adherence to Petri dishes coated with antiserum to rat immunoglobulin. The natural killer activity in the nonadherent population was enriched 16-fold.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Antibodies / pharmacology*
  • Antibodies, Monoclonal
  • Antigens, Surface*
  • Complement System Proteins
  • Cytotoxicity, Immunologic*
  • Killer Cells, Natural / immunology*
  • Mice
  • Mice, Inbred AKR
  • Mice, Inbred BALB C
  • Mice, Inbred C57BL
  • Mice, Inbred CBA
  • Rats
  • Spleen / immunology

Substances

  • Antibodies
  • Antibodies, Monoclonal
  • Antigens, Surface
  • Complement System Proteins