Peripheral blood mononuclear cell (PBMC) cultures and intracellular cytokine detection by flow cytometry before and after thyroid hormone replacement therapy were performed (free thyroxine (FT4) 0.030 + / - 0.034 ng/dL , versus FT4 : 2.16 + / - 0.68 ng/dL).
With thyroid hormone therapy the mean plasma somatomedin-C level increased four-fold (1.00 + / - 0.43 U/ml).
The pretreatment with the antagonist amiodarone suppressed the hormone effect , suggesting that nuclear receptors could mediate poly (ADP-ribose) polymerase activity.
The optimum incubation conditions for the poly (ADP-Rib) polymerase were determined.