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https://www.readbyqxmd.com/read/28324106/clinical-features-of-early-and-late-postoperative-hypothyroidism-after-lobectomy
#1
Suyeon Park, Min Ji Jeon, Eyun Song, Hye-Seon Oh, Mijin Kim, Hyemi Kwon, Tae Yong Kim, Suck Joon Hong, Young Kee Shong, Won Bae Kim, Tae-Yon Sung, Won Gu Kim
Context: Lobectomy is preferred in thyroid cancer to decrease surgical complications and avoid lifelong thyroid-hormone replacement. However, postoperative hypothyroidism, requiring thyroid-hormone replacement, may occur. Objective: We aimed to identify the incidence and risk factors of postoperative hypothyroidism to develop a surveillance strategy after lobectomy for papillary thyroid microcarcinoma (PTMC). Methods: This historical cohort study involved 335 PTMC patients treated by lobectomy...
January 11, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28324105/thyroid-hormone-dependent-epigenetic-regulation-of-melanocortin-4-receptor-levels-in-female-offspring-of-obese-rats
#2
T Tabachnik, T Kisliouk, A Marco, N Meiri, A Weller
Maternal obesity is a risk factor for offspring obesity. Melanocortin 4 receptor (Mc4r) is one of the mediators of food intake and energy balance. This study examines epigenetic mechanisms underlying altered Mc4r levels in the hypothalamic paraventricular nucleus in offspring of high-fat diet (HFD)-induced obese dams, and aims to elucidate the role of thyroid hormones in epigenetic regulation and tagging of their nucleosome at the Mc4r promoter. Female Wistar rats were fed HFD or chow from weaning through gestation and lactation...
January 9, 2017: Endocrinology
https://www.readbyqxmd.com/read/28324063/dio2-thr92ala-reduces-deiodinase-2-activity-and-serum-t3-levels-in-thyroid-deficient-patients
#3
M G Castagna, M Dentice, S Cantara, R Ambrosio, F Maino, T Porcelli, C Marzocchi, C Garbi, F Pacini, D Salvatore
Context: A significant proportion of athyreotic LT4-treated patients experience hypothyroid-like symptoms. During LT4 replacement, levels of the active hormone triiodothyronine (T3) strictly depend on type-2-deiodinase (D2)-mediated activation of LT4. The Thr92Ala polymorphism and the 258 G/A in the DIO2 gene have been associated with various clinical conditions. Objectives: To investigate the effects of DIO2 polymorphisms in thyroid hormone homeostasis. Design: We compared the pre-surgical hormonal status of thyroidectomized LT4-treated patients who had a similar TSH level, to their post-surgery status, and analyzed their DIO2 genotype in a subgroup of 102/140 (72...
February 2, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28324060/expression-of-pd-1-and-pd-l1-in-anaplastic-thyroid-cancer-patients-treated-with-multimodal-therapy-results-from-a-retrospective-study
#4
Ashish V Chintakuntlawar, Kandelaria M Rumilla, Carin Y Smith, Sarah M Jenkins, Robert L Foote, Jan L Kasperbauer, John C Morris, Mabel Ryder, Samer Alsidawi, Crystal Hilger, Keith C Bible
Context: Anaplastic thyroid cancer (ATC) is rare and a highly fatal malignancy. The role of PD-1 and PD-L1 as prognostic and/or predictive marker in ATC is unknown. Objective: Multimodal therapy offers the best chance at tumor control. Objective of this study was to detect potential associations of PD-1/PD-L1 axis variables with outcome data in ATC. Design: Retrospective study of a uniformly treated cohort. Setting: Single institution retrospective cohort study...
March 7, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28324052/skeletal-complications-and-mortality-in-thyroid-cancer-a-population-based-study
#5
Palak Choksi, Maria Papaleontiou, Cui Guo, Francis Worden, Mousumi Banerjee, Megan Haymart
Context: Although bone is a common site for tumor metastases, the burden of bone events (bone metastases and skeletal-related events (SREs)) in patients with thyroid cancer is not well known. Objective: To measure the prevalence of bone events and their impact on mortality in patients with thyroid cancer. Patients, Design, and Setting: We identified patients diagnosed with thyroid cancer between 1991-2011 from the linked Surveillance Epidemiology and End Results-Medicare (SEER-Medicare) dataset...
January 25, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28324024/thyroid-hormone-receptor-%C3%AE-controls-developmental-timing-and-regulates-the-rate-and-coordination-of-tissue-specific-metamorphosis-in-xenopus-tropicalis
#6
Luan Wen, Yuki Shibata, Dan Su, Liezhen Fu, Nga Luu, Yun-Bo Shi
Thyroid hormone (T3) receptor (TR) mediates the effects of T3 on organ metabolism and animal development. There are two TR genes, TRα and TRβ, in all vertebrates. During animal development, TRα expression is activated earlier than zygotic T3 synthesis and secretion into the plasma, implicating a developmental role of TRα both in the presence and absence of T3. Using T3-dependend amphibian metamorphosis as a model, we have previously proposed a dual functional model for TRs, in particular TRα, during development...
March 14, 2017: Endocrinology
https://www.readbyqxmd.com/read/28324019/no-mediated-regulation-of-glut-by-t3-and-fsh-in-rat-granulosa-cells
#7
Ye Tian, Yu Ding, Juan Liu, Dai Heng, Kaili Xu, Wenbo Liu, Cheng Zhang
Thyroid hormones (THs) are important for normal reproductive function. Although 3,5,3'-triiodothyronine (T3) enhances follicle-stimulating hormone (FSH)-induced preantral follicle growth and granulosa cells development in vitro, little is known about the molecular mechanisms regulating ovarian development via glucose. In this study, we investigated whether and how T3 combines with FSH to regulate glucose transporter protein (GLUT) expression and glucose uptake in granulosa cells. Here, we present evidence that T3 and FSH co-treatment significantly increased GLUT-1/GLUT-4 expression, and translocation in cells, as well as glucose uptake...
March 17, 2017: Endocrinology
https://www.readbyqxmd.com/read/28324018/thyroid-status-and-mortality-in-a-prospective-hemodialysis-cohort
#8
Connie M Rhee, Amy S You, Danh V Nguyen, Steven M Brunelli, Matthew J Budoff, Elani Streja, Tracy Nakata, Csaba P Kovesdy, Gregory A Brent, Kamyar Kalantar-Zadeh
Context and Objective: Compared to the general population, hemodialysis patients have a substantially higher risk of hypothyroidism, as defined by an elevated serum thyrotropin (TSH) level, and cardiovascular mortality. Whereas an elevated serum TSH is associated with cardiovascular disease and death in the general population, these associations among dialysis patients have been inconsistent. Design, Setting, Participants, and Main Outcome: We examined 541 hemodialysis patients from 17 Southern California dialysis centers in the prospective Hypothyroidism, Cardiovascular Health, and Survival (HyCARDS) study who underwent protocolized measurement of repeated serum TSH levels every six months from May 2013 to August 2015...
January 27, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28324012/deletion-of-the-thyroid-hormone-activating-type-2-deiodinase-rescues-cone-photoreceptor-degeneration-but-not-deafness-in-mice-lacking-type-3-deiodinase
#9
Lily Ng, Hong Liu, Donald L St Germain, Arturo Hernandez, Douglas Forrest
Type 2 deiodinase amplifies and type 3 deiodinase depletes levels of the active form of thyroid hormone, triiodothyronine (T3). Given the opposing activities of these enzymes, we tested the hypothesis that they counteract each other's developmental functions by investigating whether deletion of type 2 deiodinase (encoded by Dio2) modifies sensory phenotypes in type 3 deiodinase-deficient (Dio3-/-) mice. Dio3-/- mice display degeneration of retinal cones, the photoreceptors that mediate daylight and color vision...
March 7, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323998/genes-outside-the-major-histocompatibility-complex-mhc-locus-are-linked-to-the-development-of-thyroid-autoantibodies-and-thyroiditis-in-nod-h2h4-mice
#10
Sandra M McLachlan, Sylvie Lesage, Roxanne Collin, Bianca Banuelos, Holly A Aliesky, Basil Rapoport
Thyroiditis and autoantibodies to thyroglobulin (TgAb) and thyroid peroxidase (TPOAb) develop spontaneously in NOD.H2h4 mice, a phenotype enhanced by dietary iodine. NOD.H2h4 mice were derived by introducing the Major Histocompatibility Class (MHC) molecule I-Ak from B10.A(4R) mice to non-obese diabetic (NOD) mice. Apart from I-Ak, the genes responsible for the NOD.H2h4 phenotype are unknown. Extending serendipitous observations from crossing BALB/c to NOD.H2h4 mice, thyroid autoimmunity was investigated in both genders of the F1, F2 and the second generation backcross of F1 to NOD...
January 17, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323994/direct-regulation-of-histidine-ammonia-lyase-2-gene-by-thyroid-hormone-in-the-developing-adult-intestinal-stem-cells
#11
Nga Luu, Liezhen Fu, Kenta Fujimoto, Yun-Bo Shi
Most vertebrate organs utilize adult stem cells to maintain homeostasis and ensure proper repair when damaged. How such organ-specific stem cells are formed during vertebrate development is largely unexplored. We have been using the thyroid hormone (T3)-dependent amphibian metamorphosis to address this issue. Early studies in Xenopus laevis have shown that intestinal remodeling involves complete degeneration of the larval epithelium and de novo formation of adult stem cells through dedifferentiation of some larval epithelial cells...
February 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323992/quantification-of-thyroid-cancer-and-multinodular-goiter-risk-in-the-dicer1-syndrome-a-family-based-cohort-study
#12
Nicholas E Khan, Andrew J Bauer, Kris Ann P Schultz, Leslie Doros, Rosamma M Decastro, Alexander Ling, Maya B Lodish, Laura A Harney, Ron G Kase, Ann G Carr, Christopher T Rossi, Amanda Field, Anne K Harris, Gretchen M Williams, Louis P Dehner, Yoav H Messinger, D Ashley Hill, Douglas R Stewart
Context: The risk of thyroid cancer and multinodular goiter (MNG) in the DICER1 syndrome, a rare tumor-predisposition disorder, is unknown. Objective: To quantify the risk of thyroid cancer and MNG in individuals with the DICER1 syndrome. Design: Family-based cohort study. Setting: National Institutes of Health (NIH) Clinical Center (CC). Participants: The National Cancer Institute DICER1 syndrome cohort consisted of 145 individuals with a DICER1 germline mutation and 135 family controls from 48 families...
February 2, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323979/thyroid-cancer-following-childhood-low-dose-radiation-exposure-a-pooled-analysis-of-nine-cohorts
#13
Jay H Lubin, M Jacob Adams, Roy Shore, Erik Holmberg, Arthur B Schneider, Michael M Hawkins, Leslie L Robison, Peter D Inskip, Marie Lundell, Robert Johansson, Ruth A Kleinerman, Florent de Vathaire, Lena Damber, Siegal Sadetzki, Margaret Tucker, Ritsu Sakata, Lene H S Veiga
Context: The increased use of diagnostic and therapeutic procedures that involve radiation raises concerns about radiation effects, particularly in children and to the radio-sensitive thyroid gland. Objectives: Evaluation of relative risk (RR) trends for thyroid radiation doses <0.2 gray; evidence of a threshold dose; and possible modifiers of the dose-response, e.g., sex, age at exposure, time since exposure. Design and setting: Pooled data from nine cohort studies of childhood external radiation exposure and thyroid cancer with individualized dose estimates, ≥1,000 irradiated subjects or ≥10 thyroid cancer cases, with data limited to individuals receiving doses <0...
March 8, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323971/n-acetylcysteine-prevents-low-t3-syndrome-and-attenuates-cardiac-dysfunction-in-a-male-rat-model-of-myocardial-infarction
#14
Tatiana Ederich Lehnen, Marcus Vinicius Santos, Adrio Lima, Ana Luiza Maia, Simone Magagnin Wajner
Nonthyroidal illness syndrome (NTIS) affects patients with myocardial infarction (MI). Oxidative stress has been implicated as a causative factor of NTIS, and reversed via N-acetylcysteine (NAC). Male Wistar rats submitted to left anterior coronary artery occlusion received NAC or placebo. Decreases in T3 levels were noted in MI-placebo at 10 and 28 days post-MI, but not in MI-NAC. Groups exhibited similar infarct areas whereas MI-NAC exhibited higher ejection fraction (EF) than MI-placebo. Left ventricular systolic (LVSd) and diastolic (LVDd) diameters were also preserved in MI-NAC, but not in MI-placebo...
February 17, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323957/risk-profile-of-the-ret-a883f-germline-mutation-an-international-collaborative-study
#15
Jes Sloth Mathiesen, Mouhammed Amir Habra, John Howard Duncan Bassett, Sirazum Mubin Choudhury, Sabapathy Prakash Balasubramanian, Trevor A Howlett, Bruce G Robinson, Anne-Paule Gimenez-Roqueplo, Frederic Castinetti, Peter Vestergaard, Karin Frank-Raue
Context: The A883F germline mutation of the REarranged during Transfection proto-oncogene causes multiple endocrine neoplasia 2B. In the revised American Thyroid Association (ATA) guidelines for the management of medullary thyroid carcinoma (MTC) the A883F mutation has been reclassified from the highest to high risk level, although no well-defined risk profile for this mutation exists. Objective: To create a risk profile for the A883F mutation for appropriate classification in the ATA risk levels...
March 17, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323943/growth-development-and-intestinal-remodeling-occurs-in-the-absence-of-thyroid-hormone-receptor-alpha-in-tadpoles-of-xenopus-tropicalis
#16
Jinyoung Choi, Atsuko Ishizuya-Oka, Daniel R Buchholz
During development in all vertebrates, thyroid hormone receptors (TRs) are expressed before as well as during and after the peak in plasma thyroid hormone (TH) levels. Previously, we established a role for unliganded TRα in gene repression and developmental timing using tadpoles of TRα knockout (TRαKO) frogs. Here, we examined the role of liganded TRα on growth, development, and intestinal remodeling during natural and TH-induced metamorphosis. Disrupted TRα had little effect on growth during the larval period, but after metamorphosis TRαKO juveniles grew more slowly than wild-type (WT) juveniles...
March 2, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323940/thyroid-signaling-insulin-resistance-and-type-2-diabetes-mellitus-a-mendelian-randomization-study
#17
Maxime M Bos, Roelof Aj Smit, Stella Trompet, Diana van Heemst, Raymond Noordam
CONTEXT: Increasing evidence suggests an association between thyroid stimulating hormone (TSH), free thyroxine (fT4) and deiodinases with insulin resistance and type 2 diabetes mellitus (T2D). OBJECTIVE: We examined whether TSH and fT4 levels and deiodinases are causally associated with insulin resistance and T2D using Mendelian randomization (MR). METHODS: We selected twenty genetic variants for TSH level and four for fT4 level (identified in a GWAS meta-analysis of European-ancestry cohorts) as instrumental variables for TSH and fT4 level, respectively...
March 9, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323937/tert-braf-and-nras-in-primary-thyroid-cancer-and-metastatic-disease
#18
Miguel Melo, Adriana Gaspar da Rocha, Rui Batista, João Vinagre, Maria João Martins, Gracinda Costa, Cristina Ribeiro, Francisco Carrilho, Valeriano Leite, Cláudia Lobo, José Manuel Cameselle-Teijeiro, Bruno Cavadas, Luísa Pereira, Manuel Sobrinho-Simões, Paula Soares
Context: Little is known about the frequency of key mutations in thyroid cancer metastases and its relationship with the primary tumor genotype. Objectives: To evaluate the frequency of TERT promoter (TERTp), BRAF and NRAS mutations in metastatic thyroid carcinomas, analyzing primary thyroid tumors, lymph node metastases (LNM) and distant metastases. Design and patients: Mutation analysis was performed in 437 tissue samples from 204 patients, mainly with papillary thyroid carcinomas (PTC) (n=180), including 196 LNM and 56 distant metastases...
March 6, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323932/active-surveillance-for-patients-with-papillary-thyroid-microcarcinoma-a-single-center-s-experience-in-korea
#19
Hyemi Kwon, Hye-Seon Oh, Mijin Kim, Suyeon Park, Min Ji Jeon, Won Gu Kim, Won Bae Kim, Young Kee Shong, Dong Eun Song, Jung Hwan Baek, Ki-Wook Chung, Tae Yong Kim
Context: Papillary thyroid microcarcinoma (PTMC) usually has an excellent prognosis. Objective: To evaluate the 3-dimensional structures of PTMCs using serial neck ultrasonography (US) in patients under active surveillance. Design and Setting: A retrospective cohort study. Participants: In total, 192 patients diagnosed with PTMC under active surveillance for more than 1 year were included in a median 30-month follow-up...
March 3, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323925/refining-dynamic-risk-stratification-and-prognostic-groups-for-differentiated-thyroid-cancer-with-tert-promoter-mutations
#20
Tae Hyuk Kim, Chang-Seok Ki, Hye Seung Kim, Kyunga Kim, Jun-Ho Choe, Jung-Han Kim, Jee Soo Kim, Young Lyun Oh, Soo Yeon Hahn, Jung Hee Shin, Hye Won Jang, Sun Wook Kim, Jae Hoon Chung
Context: Currently, no recurrence or mortality risk systems consider molecular testing when predicting thyroid cancer outcomes. Objective: We developed an integrative prognostic system that incorporates TERT promoter mutations into the recently proposed risk reclassification system after initial therapy (dynamic risk stratification, DRS) to better categorize and predict outcomes. Design: A total of 357 differentiated thyroid cancer patients without initial distant metastasis were enrolled...
February 28, 2017: Journal of Clinical Endocrinology and Metabolism
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