Related Experiment Video
Updated: May 1, 2026

In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice
Published on: August 23, 2019
Thyroid hormone inactivation in gastrointestinal stromal tumors
Michelle A Maynard1, Adrian Marino-Enriquez, Jonathan A Fletcher
1From the Thyroid Program of the Division of Endocrinology (M.A.M., C.G., C.D., H.S., R.H.J., S.A.H.) and the Clinical Research Center (H.A.F.), Boston Children's Hospital, the Departments of Pathology (A.M.-E., J.A.F., D.M.D., Y.W.), Surgery (C.P.R.), and Radiology (M.C.F.), and the Thyroid Section of the Division of Endocrinology, Diabetes, and Hypertension (L.Y., P.R.L., S.A.H.), Brigham and Women's Hospital, and the Dana-Farber Cancer Institute (J.A.F., C.P.R., P.R.L., S.A.H.) - all in Boston; the Department of Neurobiology and Anatomy, Kochi Medical School, Nankoku, Japan (T.T.); and the Endocrinology and Diabetes Division, Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles (J.M.H.).
Abstract:
Gastrointestinal stromal tumors (GISTs) are resistant to traditional chemotherapy but are responsive to the tyrosine kinase inhibitors imatinib and sunitinib. The use of these agents has improved the outcome for patients but is associated with adverse effects, including hypothyroidism. Multiple mechanisms of this effect have been proposed, including decreased iodine organification and glandular capillary regression. Here we report the finding of consumptive hypothyroidism caused by marked overexpression of the thyroid hormone-inactivating enzyme type 3 iodothyronine deiodinase (D3) within the tumor. Affected patients warrant increased monitoring and may require supernormal thyroid hormone supplementation.
More Related Videos
07:21Molecular and Immunologic Techniques in a Genetically Engineered Mouse Model of Gastrointestinal Stromal Tumor
Published on: May 2, 2022
06:43Robotic Duodenal Sleeve Resection for Gastrointestinal Stromal Tumor with Rare Exon 8 KIT Mutation Following Neoadjuvant Imatinib
Published on: April 3, 2026
Related Concept Videos
Synthesis and Regulation of Thyroid Hormones
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The...
Hyperthyroidism I: Introduction
Hyperthyroidism II: Pathophysiology
Graves Disease II: Pathophysiology
Functions of Thyroid Hormones
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
Hypothyroidism II: Pathophysiology