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The application of extraocular muscle maximum standardized uptake value of 99mTc-diethylenetriamine pentaacetic acid orbital single photon emission computed tomography/computed tomography in the assessment of Graves' orbitopathy.
Nucl Med Commun
February 2025
Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin, China.
Purpose: To study the feasibility and value of assessing patients with Graves' orbitopathy (GO) in 99mTc-diethylenetriamine pentaacetic acid (DTPA) orbital single photon emission computed tomography/computed tomography (SPECT/CT) with extraocular muscle maximum standardized uptake value (SUVmax).
Methods: A total of 235 patients underwent 99mTc-DTPA orbital SPECT/CT, including 176 patients with GO and 59 patients with Graves' disease (GD) as controls. The SUVmax of extraocular muscles, including right medial rectus muscle (RMR), right lateral rectus muscle (RLR), left medial rectus muscle (LMR), left lateral rectus muscle (LLR), was compared between groups, correlation analyses with clinical activity scores (CAS) and serological indices was performed, and the diagnostic efficacy was evaluated using receiver operating characteristic curves.
Spatially dependent tissue distribution of thyroid hormones by plasma thyroid hormone binding proteins.
Pflugers Arch
January 2025
Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA, 30322, USA.
Plasma thyroid hormone (TH) binding proteins (THBPs), including thyroxine-binding globulin (TBG), transthyretin (TTR), and albumin (ALB), carry THs to extrathyroidal sites, where THs are unloaded locally and then taken up via membrane transporters into the tissue proper. The respective roles of THBPs in supplying THs for tissue uptake are not completely understood. To investigate this, we developed a spatial human physiologically based kinetic (PBK) model of THs, which produces several novel findings.
View Article and Find Full Text PDFCharacterization of thyroid hormone transport in a human choroid plexus papilloma cell line (HIBCPP) as an in vitro blood-cerebrospinal fluid barrier model.
Mol Cell Endocrinol
February 2025
Amsterdam Institute for Life and Environment (A-Life), Vrije Universiteit Amsterdam (VU), De Boeleni 1085, 1081, HV Amsterdam, the Netherlands.
Adequate levels of thyroid hormones (THs) in the fetal brain are vital for early neurodevelopment. Most of the TH in fetal brain is derived from circulating thyroxine (T4), which gets locally converted into the biologically active triiodothyronine (T3) by deiodinase enzymes. One of the major routes of TH into the brain is through the blood-cerebrospinal fluid barrier (BCSFB).
View Article and Find Full Text PDFGenetic Causality of Hypothyroidism and Adverse Pregnancy Outcomes: A Combined Mendelian Randomisation Study and Bioinformatics Analysis.
Int J Womens Health
December 2024
College of Acupuncture and Massage, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, People's Republic of China.
Background: Observational studies have shown that hypothyroidism is strongly associated with adverse pregnancy outcomes, and that thyroxine during pregnancy comes mainly from the mother; therefore, thyroid defects in women may lead to problems such as miscarriage due to hormonal instability in early pregnancy, and foetal neurological deficits in mid- to late gestation, but whether there is a genetic causality between the two is still a matter of some controversy.
Objective: Goal to investigate the possible causal association between hypothyroidism and unfavorable pregnancy outcomes through the use of bioinformatics and Mendelian randomization (MR).
Methods: We used Mendelian randomization (MR) analyses using single nucleotide polymorphism (SNP) sites as instrumental variables to infer causal associations between exposures and outcomes.
Thyroid Function and Brain Structure: Insight from a Mendelian Randomization Study.
Neuroendocrinology
December 2024
Department of Pharmacy, Beijing Tongren Hospital, Capital Medical University, Beijing, China.
Introduction: Thyroid hormones play a critical role in brain development. However, the precise causal associations between thyroid function and structural changes in specific brain regions remain uncertain.
Methods: We applied the univariate Mendelian randomization (UVMR) method to assess the causal effects of thyroid function on brain structure.
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