Interleukin 2 deficiency is a common feature of autoimmune mice.

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Abstract
IL 2 production was studied in autoimmune mice to assess the role of this lymphokine in the pathogenesis of murine lupus. Spleen and lymph node cells from autoimmune-susceptible mice show an age-dependent loss in the ability to produce functional IL 2. This defect correlates with disease expression and is most severe in MLR/Mp-Ipr/Ipr mice. MLR/Mp-Ipr/Ipr thymocytes gradually lose responsiveness to IL 2 with age. These results suggest that the immunoregulatory abnormalities of autoimmune mice may be due in part to IL 2 deficiency.