IL-10 and TGF-beta induce alloreactive CD4+CD25- T cells to acquire regulatory cell function.
Blood
; 101(12): 5076-83, 2003 Jun 15.
Article
in En
| MEDLINE
| ID: mdl-12609834
ABSTRACT
We previously reported that interleukin-10 (IL-10) and transforming growth factor (TGF)-beta treatment of primary mixed lymphocyte reaction (MLR) cultures resulted in secondary alloantigen-specific hyporesponsiveness and protection from graft-versus-host disease (GVHD) lethality. Here, we report that CD4+ T cells recovered from the IL-10- and TGF-beta-treated primary MLR cultures have immunoregulatory function. Tolerized cells significantly inhibited proliferation of naive alloreactive CD4+ T cells in a primary MLR. Inhibition of the naive alloresponse was observed with as few as 1 tolerized cell to 10 naive responder cells. Tolerized cells were able to significantly reduce GVHD lethality when injected with naive alloreactive CD4+ T cells into major histocombatibility class (MHC) II disparate recipients. Rigorous CD25 depletion of the primary MLR had no effect on generation of a regulatory capacity, suggesting that the regulatory cells likely originated from CD4+CD25- T cells. Immune suppression was mediated independently of IL-10 and TGF-beta production, as neutralizing antibodies for IL-10, IL-10R, and TGF-beta were unable to revert suppression, and IL-10- deficient CD4+ T cells were able to mediate in vitro and in vivo suppression. The generation of immunoregulatory cells from a CD4+CD25- population during tolerization with IL-10 and TGF-beta provides an additional mechanism to prevent GVHD lethality by T cells that may escape full tolerance induction.
Search on Google
Collection:
01-internacional
Database:
MEDLINE
Main subject:
CD4-Positive T-Lymphocytes
/
Receptors, Interleukin-2
/
Transforming Growth Factor beta
/
Interleukin-10
/
Immune Tolerance
/
Isoantigens
Limits:
Animals
Language:
En
Journal:
Blood
Year:
2003
Document type:
Article
Affiliation country:
United States