Linker for activation of B cells: a functional equivalent of a mutant linker for activation of T cells deficient in phospholipase C-gamma1 binding.


Journal Article

Adaptor proteins have important functions in coupling stimulation through immunoreceptors with downstream events. The adaptor linker for activation of B cells (LAB)/non-T cell activation linker (NTAL) is expressed in various immune cell types and has a similar domain structure as linker for activation of T cells (LAT). In this study we generated a LAB transgenic mouse to compare the functional differences between LAB and LAT. A LAB transgene expressed in LAT-deficient T cells was able to restore T cell development. However, these mice developed severe organomegaly with disorganized lymphoid tissues. Lymphocytes from these transgenic mice were hyperactivated, and T cells produced large amounts of type II cytokines. In addition, these activities appeared to be uncoupled from the TCR. An examination of the signaling capabilities of these T cells revealed that LAB resembled a LAT molecule unable to bind phospholipase C-gamma1.

Full Text

Duke Authors

Cited Authors

  • Janssen, E; Zhu, M; Craven, B; Zhang, W

Published Date

  • June 1, 2004

Published In

Volume / Issue

  • 172 / 11

Start / End Page

  • 6810 - 6819

PubMed ID

  • 15153499

Pubmed Central ID

  • 15153499

International Standard Serial Number (ISSN)

  • 0022-1767

Digital Object Identifier (DOI)

  • 10.4049/jimmunol.172.11.6810


  • eng

Conference Location

  • United States