Metabolic Effects of Synthetic Thyroid Hormone for Thyroid Cancer Treatment
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|ClinicalTrials.gov Identifier: NCT01441154|
Recruitment Status : Completed
First Posted : September 27, 2011
Last Update Posted : November 24, 2017
|First Submitted Date||September 24, 2011|
|First Posted Date||September 27, 2011|
|Last Update Posted Date||November 24, 2017|
|Start Date||September 7, 2011|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures||Not Provided|
|Original Primary Outcome Measures||Not Provided|
|Change History||Complete list of historical versions of study NCT01441154 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures||Not Provided|
|Original Secondary Outcome Measures||Not Provided|
|Current Other Outcome Measures||Not Provided|
|Original Other Outcome Measures||Not Provided|
|Brief Title||Metabolic Effects of Synthetic Thyroid Hormone for Thyroid Cancer Treatment|
|Official Title||Pharmacokinetic and Pharmacodynamic Studies of Liothyronine. A Study on the Metabolic Effects of Thyroid Hormone|
- Thyroid hormone is produced by the thyroid gland, an organ at the base of the neck. Thyroid hormone controls the body's metabolism and the function of many organs. The thyroid gland produces two forms of thyroid hormone: T4 and T3. People who have thyroid cancer are treated with thyroid hormone therapy (synthetic T4, levothyroxine), which at times needs to be stopped to allow for cancer treatments. At these times, a different form of thyroid hormone (synthetic T3, liothyronine) is used to reduce the symptoms caused by low levels of thyroid hormone. Researchers want to know more about how changes in T3 hormone affect the body and organ function.
- To study how changes in T3 hormone levels affect the body and organ function.
- Individuals at least 18 years of age who have had most or all of their thyroid removed to treat thyroid cancer who need to stop taking their regular thyroid hormone dose in preparation for the treatment of thyroid cancer.
In human adults thyroid hormone action plays a critical role in the modulation of metabolism and the function of virtually all organ/systems. The specificity of the hormonal action is ultimately the result of the interaction of the active hormone, triiodothyronine (T3), with the receptors isoforms and the co-activators and co-repressors specific for the various cells target of the hormonal action. Circulating and tissue levels of T3 are the result of the secretion of T3 and its precursor, thyroxine (T4), from the thyroid gland, the peripheral conversion of T4 into T3, and the degradation of these hormones. This complex system has only been partially studied in humans and very little is known regarding the kinetics of T3, and in particular on the correlation between circulating levels of T3 and end-organ target tissue thyroid hormone action.
The aim of this protocol is to characterize the pharmacokinetics of T3 and its biological effects at various concentrations in a cohort of thyroidectomized patients undergoing thyroid hormone replacement therapy withdrawal for the management of thyroid cancer.
Sixteen patients with a clinical indication for thyroid hormone withdrawal in preparation for 131I therapy or 123I diagnostic scan for follow-up and management of differentiated thyroid cancer will be recruited for this study. After enrollment in the study, the patients baseline characteristics will be determined during an outpatient visit while receiving levothyroxine (L-T4) therapy. The L-T4 therapy then will be suspended and substituted with an equivalent thrice daily liothyronine (L-T3) therapy for one month. Patients will be admitted to the NIH Clinical Center on the day prior to withdrawal of the T3 therapy until the diagnostic scan or the administration of radioactive iodine. During the hospitalization for this research protocol, which is expected to last eleven days, the following studies will be performed: serial blood sampling for circulating thyroid hormones to obtain pharmacokinetic parameters of L-T3, lipids, glucose and insulin, resting energy expenditure, echocardiogram, skeletal muscle strength measurement, cardiac, hepatic and skeletal muscles MRI, and quality of life and well-being questionnaires. The pharmacokinetic parameters of L-T3 will also be assessed with the first dose after the diagnostic scan or the administration of radioactive iodine.
The results obtained from this study will help in understanding the effects of thyroid hormone on metabolism, and may lead to important information on how to optimize the duration of the thyroid hormone therapy withdrawal for the treatment of thyroid cancer.
|Study Design||Time Perspective: Prospective|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Study Groups/Cohorts||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
Subjects will be adult volunteers older than age 18 who underwent total thyroidectomy for the treatment of differentiated thyroid cancer, previously undergone radioactive iodine ablation of the thyroid gland remnant, with clinical indication for withdrawal from thyroid hormone replacement therapy in preparation for nuclear medicine imaging or therapeutic procedures with radioactive iodine. The patient population will be recruited from the participants in the 77-DK-0096 natural history protocol: Studies on Thyroid Nodules and Thyroid Cancer , PI Dr.Joanna Klubo-Gwiezdzinska and from the 10-C-0102 natural history protocol: Clinical and Genetic Studies in Familial Non-Medullary Thyroid Cancer , PI Electron Kebebew.
|Ages||18 Years and older (Adult, Senior)|
|Accepts Healthy Volunteers||No|
|Contacts||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries||United States|
|Removed Location Countries|
|Other Study ID Numbers||110256
|Has Data Monitoring Committee||Not Provided|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement||Not Provided|
|Responsible Party||National Institutes of Health Clinical Center (CC) ( National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) )|
|Study Sponsor||National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)|
|PRS Account||National Institutes of Health Clinical Center (CC)|
|Verification Date||November 14, 2017|