Target cell lysis by cytotoxic T lymphocytes redirected by antibody-coated polystyrene beads

M. A. Kolber, R. R. Quinones, P. A. Henkart

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Cytotoxic T lymphocytes were found to mediate rapid lysis of target cells not normally recognized in the presence of small polystyrene beads coated with a combination of anti-T3 and antitarget cell antibodies. Lysis was not seen with beads bearing one of these antibodies alone, nor with a mixture of two types of beads each coated with a single antibody. The effector cells mediating this lysis include long term allospecific human CTL, and both human and mouse CTL clones recognizing mouse class I MHC Kb Ag. TNP-modified mouse tumor cells, a human lymphoblastoid line, and human red cells were found to be good targets for this cytotoxicity. Polystyrene beads with diameters of 3 to 15 μ caused target lysis, with a dose-response curve which typically went through a maximum and declined at high bead numbers. Maximal bead-redirected lysis by CTL was less efficient than that mediated by soluble antibody heteroconjugates of the same two antibodies. Bead-redirected target lysis was calcium dependent. These results are interpreted as a form of bystander lysis induced by the beads, since the target cell membrane is not directly crosslinked to the region of CTL activation. These observations thus favor a mechanism of lysis involving the polarized secretion of a locally acting lytic agent by CTL.

Original languageEnglish (US)
Pages (from-to)1461-1466
Number of pages6
JournalJournal of Immunology
Issue number5
StatePublished - Jan 1 1989
Externally publishedYes

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology


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