TY - JOUR
T1 - Immunoglobulin promotes the diversity and the function of T cells
AU - João, Cristina
AU - Ogle, Brenda M.
AU - Geyer, Susan
PY - 2006/7
Y1 - 2006/7
N2 - It is generally accepted in immunology that while T and B cells collaborate for the production of antibodies in response to protein antigens, T cells develop and function in the absence of B cells. However, B cell-deficient subjects and mice have unexplained cellular immune defects. Here, we examined the contribution of B cells/Ig to the generation of diversity and function of T cells. Mice lacking B cells and Ig (JH-/-) or having oligoclonal B cells (QM) had a profoundly contracted T cell receptor (TCR) Vβ repertoire: 0.08 and 1.3% of wild type, respectively. Rejection of H-Y-incompatible skin grafts in QM and JH-/- mice was significantly delayed (median, 43 and 22 days, respectively) compared to wild-type mice (median, 16 days). Furthermore, reduction of the TCR Vβ diversity by thymectomy in wild-type mice significantly increased survival of H-Y-incompatible skin grafts, and reconstitution of the T cell diversity in QM mice with Ig Fab fragments significantly decreased survival of the skin grafts. These results indicate that B cells and/or Ig "help" T cells through the generation and maintenance of T cell diversity, improving T cell function. Our results may have important implications for therapy and immune reconstitution in the context of AIDS, cancer, autoimmunity and post-myeloablative treatments.
AB - It is generally accepted in immunology that while T and B cells collaborate for the production of antibodies in response to protein antigens, T cells develop and function in the absence of B cells. However, B cell-deficient subjects and mice have unexplained cellular immune defects. Here, we examined the contribution of B cells/Ig to the generation of diversity and function of T cells. Mice lacking B cells and Ig (JH-/-) or having oligoclonal B cells (QM) had a profoundly contracted T cell receptor (TCR) Vβ repertoire: 0.08 and 1.3% of wild type, respectively. Rejection of H-Y-incompatible skin grafts in QM and JH-/- mice was significantly delayed (median, 43 and 22 days, respectively) compared to wild-type mice (median, 16 days). Furthermore, reduction of the TCR Vβ diversity by thymectomy in wild-type mice significantly increased survival of H-Y-incompatible skin grafts, and reconstitution of the T cell diversity in QM mice with Ig Fab fragments significantly decreased survival of the skin grafts. These results indicate that B cells and/or Ig "help" T cells through the generation and maintenance of T cell diversity, improving T cell function. Our results may have important implications for therapy and immune reconstitution in the context of AIDS, cancer, autoimmunity and post-myeloablative treatments.
KW - Immune reconstitution
KW - Immunoglobulin
KW - T cell function
KW - TCR repertoire
UR - http://www.scopus.com/inward/record.url?scp=33746238425&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33746238425&partnerID=8YFLogxK
U2 - 10.1002/eji.200635908
DO - 10.1002/eji.200635908
M3 - Article
C2 - 16791877
AN - SCOPUS:33746238425
VL - 36
SP - 1718
EP - 1728
JO - European Journal of Immunology
JF - European Journal of Immunology
SN - 0014-2980
IS - 7
ER -