Comparative gene expression by WC1+ gammadelta and CD4+ alphabeta T lymphocytes, which respond to Anaplasma marginale, demonstrates higher expression of chemokines and other myeloid cell-associated genes by WC1+ gammadelta T cells

Kevin K Lahmers, Jodi F Hedges, Mark A Jutila, Mingqi Deng, Mitchell S Abrahamsen, Wendy C Brown
Journal of Leukocyte Biology 2006, 80 (4): 939-52
The functions of gammadelta T cells are enigmatic, and these cells are often considered as evolutionary remnants of well-characterized alphabeta T cells. However, their conservation throughout evolution suggests that gammadelta T cells are biologically unique. In ruminants, gammadelta T cells expressing the workshop cluster 1 (WC1) scavenger receptor comprise a large proportion of circulating lymphocytes, suggesting these cells are biologically relevant and functionally different from alphabeta T cells. In fact, bovine WC1(+) gammadelta T cells can act as APC for alphabeta T cells, indicating they may express genes encoding proteins associated with innate immunity. The present study was designed to compare immune function gene expression profiles of clonal populations of WC1(+) gammadelta and CD4(+) alphabeta T cells derived from the same animal, which respond to major surface protein 2 (MSP2) of the intraerythrocytic rickettsial pathogen of cattle, Anaplasma marginale. Gene expression profiles of activated T cell clones were compared using a microarray format, and differential gene expression was confirmed by real-time RT-PCR and protein analyses. We demonstrate that although MSP2-specific alphabeta and gammadelta T cell clones express many of the same genes, gammadelta T cell clones express high levels of genes associated with myeloid cells, including chemokines CCL2, CXCL1, CXCL2, CXCL6, and surface receptors CD68, CD11b, macrophage scavenger receptor 1, macrophage mannose receptor, and galectin-3. It is important that many of these genes were also expressed at higher levels in polyclonal WC1(+) gammadelta T cells when compared with CD4(+) alphabeta T cells selected from peripheral blood.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"