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      Experimental evidence pointing to the bidirectional interaction between the immune system and the thyroid axis

      , , , , ,

      International Journal of Immunopharmacology

      Elsevier BV

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          Abstract

          Among the many examples of neuroendocrine-immune system interactions the relationship between the thyroid axis and the immune function has yet to be clearly established. Here we studied the influence of thyroid hormones on the course of an alloimmune response. Murine T(3) and T(4) levels were found to be increased a few days after the immunization of mice with allogeneic lymphoid cells. Besides in vivo treatment with T(4) was shown to increase alloantibody titers during the early stages of alloimmunization and to enforce lymphoid proliferation in vitro in a mixed lymphocyte reaction. Conversely, lowering thyroid hormone seric levels by propylthiouracil treatment, negatively modulates the humoral and cellular alloimmune responses. The evidence here points to the existence of a bidirectional communication between both systems. The possibility that the antigenic challenge would increase the thyroid gland activity thus leading to a positive modulatory action upon the immune response is also discussed.

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          Author and article information

          Journal
          International Journal of Immunopharmacology
          International Journal of Immunopharmacology
          Elsevier BV
          01920561
          July 2000
          July 2000
          : 22
          : 7
          : 491-500
          Article
          10.1016/S0192-0561(00)00012-6
          10785546
          © 2000

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