The Use of Lithium in the Treatment of Thyrotoxicosis
Open Access
- 1 October 1972
- journal article
- Published by American Society for Clinical Investigation in JCI Insight
- Vol. 51 (10), 2746-2756
- https://doi.org/10.1172/jci107094
Abstract
Since lithium has been shown to inhibit release of iodine from the thyroid, we have investigated its therapeutic potential in thyrotoxicosis. Eight detailed 131I kinetic studies were performed on seven thyrotoxic women and data was analyzed using a computer program. Lithium at serum levels of about 1 mEq liter decreased the loss of 131I from the thyroid, led to a fall in serum 131I levels and diminished urinary 131I excretion. Computer simulation of the lithium effect required, in every case, that lithium inhibit hormonal and nonhormonal thyroid iodine release. In five cases a second lithium effect was required for a satisfactory fit of the model soluton with observed data: namely, an inhibition of hormone disappearance from serum. Neither inhibition of release nor of hormone disappearance seemed to be affected by methimazole (release: 52% decrease without methimazole, 60% with methimazole; hormone disappearance: ∼60% decrease in both). When Li+ was discontinued, recovery of the iodine release rate and hormone disappearance rate over the observed time span was variable, ranging from no recovery to rates that exceeded pre-Li+ values. When Li+ is used alone its effect on serum hormone levels is diminished due to continued accumulation of iodide by the thyroid. Thus, serum thyroxine-iodine levels fell 21-30% in 6-8 days in patients who did not receive methimazole and 15-67% in the methimazole-treated subjects. For prolonged therapy, therefore, a thiocarbamide drug must be used in conjunction with Li+. The similarity of inhibition of iodine release from the thyroid produced by Li+ and iodides is discussed.Keywords
This publication has 21 references indexed in Scilit:
- Thyroid Secretionin Vitro: Inhibition of TSH and Dibutyryl Cyclic-AMP Stimulated131I Release by Li+1Endocrinology, 1971
- Measurement of "Free" Thyroxine in SerumClinical Chemistry, 1971
- A Semiautomated Nonincineration Technique for Determining Serum ThyroxineClinical Chemistry, 1970
- Endemic Goiter in Greece: Thyroid Hormone KineticsJournal of Clinical Endocrinology & Metabolism, 1970
- Inhibition by iodine of the release of thyroxine from the thyroid glands of patients with thyrotoxicosisJCI Insight, 1970
- Effect of Stable Iodine on Thyroid Iodine ReleaseJournal of Clinical Endocrinology & Metabolism, 1969
- Preliminary report of a longitudinal study of the effects of lithium on iodine metabolism.1969
- TSH- or LATS-Stimulated Thyroid Hormone Release Is Inhibited by IodideEndocrinology, 1969
- QUANTITATIVE STUDIES OF IODINE METABOLISM IN IODIDE-TREATED THYROTOXICOSIS1964
- FACTORS AFFECTING THE FRACTIONAL RATE OF RELEASE OF RADIOIODINE FROM THE THYROID GLAND IN MAN1956