CD58/LFA-3 and IL-12 provided by activated monocytes are critical in the in vitro expansion of CD56+ T cells.

Journal Article (Journal Article)

A small proportion of human CD3+ T lymphocytes are known to co-express CD56, an antigen usually restricted in its expression to natural killer (NK) cells. Whereas the in vivo function of CD3+ CD56+ T cells remains unknown, we and others have previously shown that both in vitro and in vivo, these cells can mediate a significantly greater degree of MHC-unrestricted cytotoxicitv against a variety of human tumor cells when compared to either CD3+ CD56- T cells or lymphokine activated killer (LAK) cells. While the mechanismns regulating the in vivo expansion of CD56+ T cells are not known, here we demonstrate the importance of CD2-mediated IL-12-dependent signals in the in vitro expansion of CD56+ T cells. Specifically, we show that activated monocytes provide a contact dependent factor (CD58/LFA-3) and a soluble factor (IL-12), both critical for the in vitro expansion of CD56+ T cells. The biological and therapeutic implications of these findings are discussed.

Full Text

Duke Authors

Cited Authors

  • Lopez, RD; Waller, EK; Lu, PH; Negrin, RS

Published Date

  • February 2001

Published In

Volume / Issue

  • 49 / 12

Start / End Page

  • 629 - 640

PubMed ID

  • 11258789

International Standard Serial Number (ISSN)

  • 0340-7004

Digital Object Identifier (DOI)

  • 10.1007/s002620000148


  • eng

Conference Location

  • Germany