Melatonin, the main hormone of the pineal gland, when chronically injected into young mice or mice immuno-depressed by aging or by cyclophosphamide treatment, is able to enhance the antibody response to a T-dependent antigen. The enhancement of the antibody response is associated with increased induction of T helper cell activity and IL-2 production, as evidenced in mice immunodepressed by aging or by cyclophosphamide treatment. These observations suggest that melatonin treatment may be successfully used in the therapy of immunodepressive conditions.
- T cell
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