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Thyroid resistance

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https://www.readbyqxmd.com/read/28817605/all-trans-retinoic-acid-suppresses-malignant-characteristics-of-cd133-positive-thyroid-cancer-stem-cells-and-induces-apoptosis
#1
Dan Mei, Bin Lv, Bo Chen, Shan Xiao, Jie Jiang, Yan Xie, Ling Jiang
Recently, diagnoses of radioiodine-refractory differentiated thyroid cancer (RAI-R DTC) have become more common; prognosis is poor. It has been suggested that cancer stem cells account for radiotherapy resistance. By flow cytometry, different expression percents of CD133 and OCT4 in thyroid cancer cell lines were detected. By real-time quantitative PCR, different mRNA expression of CD133, OCT4, GLUT1, thyroglobulin (TG), thyroperoxidase (TPO) and sodium iodine symporter (NIS) was analyzed; the localization of CD133, OCT4, and NIS expression was examined using immunofluorescence confocal microscopy...
2017: PloS One
https://www.readbyqxmd.com/read/28817373/cabozantinib-as-salvage-therapy-for-patients-with-tyrosine-kinase-inhibitor-refractory-differentiated-thyroid-cancer-results-of-a-multicenter-phase-ii-international-thyroid-oncology-group-trial
#2
Maria E Cabanillas, Jonas A de Souza, Susan Geyer, Lori J Wirth, Michael E Menefee, Stephen V Liu, Komal Shah, John Wright, Manisha H Shah
Purpose Sorafenib and lenvatinib are oral multikinase inhibitors targeting vascular endothelial growth factor receptor (VEGFR) and approved for radioiodine (RAI)-refractory differentiated thyroid cancer (DTC). However, there are no approved second- or third-line therapies. MET is implicated in resistance to VEGFR inhibitors. Cabozantinib is an oral multikinase inhibitor targeting MET in addition to VEGFR and is approved for medullary thyroid cancer. In a phase I study of cabozantinib, five of eight patients with DTC previously treated with a VEGFR-targeted therapy had an objective response to cabozantinib...
August 17, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28816536/optimizing-lenvatinib-therapy-in-patients-with-metastatic-radioactive-iodine-resistant-differentiated-thyroid-cancers
#3
Sina Jasim, Nicole M Iniguez-Ariza, Crystal R Hilger, Ashish V Chintakuntlawar, Mabel M Ryder, John C Morris, Keith C Bible
BACKGROUND AND OBJECTIVES: Lenvatinib is approved for use in advanced radioactive iodine resistant differentiated thyroid cancers (RAIR-DTCs); its efficacy is indisputable, but toxicities are great, creating daunting challenges for patients and providers. Few data regarding early adverse events and impact on quality of life (QOL) exist; we sought to add clarity to these issues by analyzing our initial post-approval lenvatinib experience. METHODS: Standardized patient education was implemented, providing detailed instructions and expert provider contacts to facilitate timely reporting of toxicities and guide responsive actions...
August 17, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28816534/seven-familial-dysalbuminemic-hyperthyroxinemia-cases-in-three-unrelated-japanese-families-and-high-performance-liquid-chromatography-analysis-of-the-thyroxine-binding-profile
#4
Hidekazu Nagano, Yoshinori Nakagawa, Naofumi Ishikawa, Yuya Watanabe, Yui Miyabayashi, Akitoshi Nakayama, Masanori Fujimoto, Eri Komai, Akina Shiga, Ai Tamura, Takashi Kono, Tomoko Takiguchi, Seiichiro Higuchi, Ikki Sakuma, Naoko Hashimoto, Sawako Suzuki, Hisashi Koide, Kotaro Yokote, Tomoaki Tanaka
OBJECTIVE: Familial dysalbuminemic hyperthyroxinemia (FDH) is caused by abnormal human serum albumin (HSA) with an increased thyroxine (T4) affinity leading to euthyroid hyperthyroxinemia. One- and two-step immunoassay of serum samples from FDH patients (e.g., Japanese patients) with the HSA R218P mutation can yield false-positive free thyroxine (FT4) results. Therefore, it is difficult to distinguish FDH from syndrome of inappropriate secretion of thyroid-stimulating hormone (e.g., syndrome of resistance to thyroid hormone, thyroid-stimulating hormone [TSH]-producing pituitary adenoma), even when multiple assays are used...
August 17, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28805135/intermittent-dosing-of-dabrafenib-and-trametinib-in-metastatic-brafv600e-mutated-papillary-thyroid-cancer-two-case-reports
#5
Paul S White, Anita Pudusseri, Stephanie L Lee, Omar Eton
BACKGROUND: A multi-institutional randomized Phase II trial of continuous dosing of dabrafenib with or without trametinib is ongoing in metastatic thyroid cancer. Preclinical evidence and emerging clinical experience in other cancers support evaluating intermittent dosing of these two agents to achieve more durable response, while being better tolerated and more cost effective. PATIENTS: Two consecutive patients with symptomatic, metastatic radioactive iodine (RAI) resistant BRAF V600E mutated papillary thyroid cancer and poor performance status were treated initially with dabrafenib 150mg twice daily plus trametinib 2mg once daily, first in continuous daily dosing, then in a five-week-on and three-week-off schedule...
August 12, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28799288/neuroprotective-activity-of-cannabinoid-receptor-2-against-oxidative-stress-and-apoptosis-in-rat-pups-having-experimentally-induced-congenital-hypothyroidism
#6
Mehmet Eray Alcigir, Halef Okan Dogan, Sevil Atalay Vural, Fatma Meriç Yilmaz
In this study, it was aimed to show the cannabinoid receptor-2 (CB2) role, which is a part of neuroprotective endocannabinoidal system, against increasing nitric oxide synthetase (iNOS, eNOS) levels and the apoptotic activity (caspase-3, caspase-9 and DNA in situ fragmentation) within the postnatal critical period in pups of pregnant rats with artificially induced maternal thyroid hormone (TH) deficiency. Each of the 3 groups established comprised 1 male and 2 female rats, and they were coupled. Their pups were used...
August 11, 2017: Developmental Neurobiology
https://www.readbyqxmd.com/read/28781778/glucose-metabolism-before-and-after-radioiodine-therapy-of-a-patient-with-graves-disease-assessment-by-continuous-glucose-monitoring
#7
Yun Hu, Gu Gao, Reng-Na Yan, Feng-Fei Li, Xiao-Fei Su, Jian-Hua Ma
Hyperthyroidism causes impaired glucose tolerance, insulin resistance (IR) and insulin secretion. However, the glucose variability affected by thyroid dysfunction remains unclear. Glucose variability was assessed by continuous glucose monitoring (CGM) in a non-diabetic patient with Graves' disease (GD), to the best of our knowledge, for the first time. A 28-year-old man with GD, who had been taking methimazole for 4 years, was treated with radioiodine on August 17th 2016. Although the patient exhibited normal glycated hemoglobin (HbA1c; 5...
August 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28781255/-pharmacological-approaches-for-correction-of-thyroid-dysfunctions-in-diabetes-mellitus
#8
REVIEW
A O Shpakov
Thyroid diseases are closely associated with the development of types 1 and 2 diabetes mellitus (DM), and as a consequence, the development of effective approaches for their treatment is one of the urgent problems of endocrinology. Traditionally, thyroid hormones (TH) are used to correct functions of the thyroid system. However, they are characterized by many side effects, such as their negative effect on the cardiovascular system as well as the ability of TH to enhance insulin resistance and to disturb insulin-producing function of pancreas, exacerbating thereby diabetic pathology...
May 2017: Biomedit︠s︡inskai︠a︡ Khimii︠a︡
https://www.readbyqxmd.com/read/28774778/frontiers-in-endocrine-disruption-impacts-of-organotin-on-the-hypothalamus-pituitary-thyroid-axis
#9
REVIEW
Ana Paula Santos-Silva, Marcelle Novaes Andrade, Paula Pereira-Rodrigues, Francisca Diana Paiva-Melo, Paula Soares, Jones Bernardes Graceli, Glaecir Roseni Mundstock Dias, Andrea Claudia Freitas Ferreira, Denise Pires de Carvalho, Leandro Miranda-Alves
Endocrine disruptors (EDs), chemical substances widely used in industry and ubiquitously distributed in the environment, are able to interfere with the synthesis, release, transport, metabolism, receptor binding, action, or elimination of endogenous hormones. EDs affect homeostasis mainly by acting on nuclear and nonnuclear steroid receptors but also on serotonin, dopamine, norepinephrine and orphan receptors in addition to thyroid hormone receptors. Tributyltin (TBT), an ED widely used as a pesticide and biocide in antifouling paints, has well-documented actions that include inhibiting aromatase and affecting the nuclear receptors PPARγ and RXR...
July 31, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28736926/effects-of-testosterone-enanthate-treatment-in-conjunction-with-resistance-training-on-thyroid-hormones-and-lipid-profile-in-male-wistar-rats
#10
M Zarei, M Zaeemi, A Rashidlamir
This study was conducted to determine the effects of 8-week administration of testosterone enanthate (TE) in conjunction with resistance training on thyroid hormones and lipid profiles. Sixty male adult Wistar rats were randomly divided into six groups: C: olive oil, RT: resistance training + olive oil, LD: TE (20 mg/kg), HD: TE (50 mg/kg), RT + LD: RT + TE (20 mg/kg), RT + HD: RT + TE (50 mg/kg). The RT consisted of climbing (5 reps/3 sets) a ladder carrying a load suspended from the tail. At the end, blood specimens were obtained from the orbital sinus and serum concentration of T4, T3, TSH and lipid profiles was determined...
July 23, 2017: Andrologia
https://www.readbyqxmd.com/read/28713697/safe-implementation-of-retroauricular-robotic-and-endoscopic-neck-surgery-in-south-america
#11
REVIEW
Renan Bezerra Lira, Thiago Celestino Chulam, Luiz Paulo Kowalski
In the last three decades, otolaryngology and head and neck oncological surgery have shown remarkable progress with the development of several modalities of endoscopic-assisted minimally invasive surgeries. More recently, the Da Vinci robotic surgery system has promoted the development of several surgical approaches with less morbidity and better cosmetic results, including the transaxillary and retroauricular approaches for thyroid surgery and neck dissections. In South America, there are several shortcomings regarding financial resources as well as the lack of support for innovation leading to a significant delay in adoption of numerous technological advances in medical practice...
June 2017: Gland Surgery
https://www.readbyqxmd.com/read/28701285/association-of-divalent-cations-and-insulin-resistance-with-thyroid-hormones-in-patients-with-type-2-diabetes-mellitus
#12
Rajendran Jayanthi, Abu Raghavan Srinivasan, Niranjan Gopal, Ramesh Ramaswamy
AIM: The study was primarily aimed at investigating the association of Magnesium and Zinc levels in the serum of adult Non- obese and Obese type 2 diabetic patients, with particular reference to thyroid comorbidity. METHODS: 108 patients with T2DM of both genders (24 Non obese and 84 Obese) were enrolled from a tertiary health care unit in Puducherry. The cardio-metabolic risk factors were assessed through body mass index, Waist hip ratio, blood pressure, fasting blood glucose, lipid profile and glycated haemoglobin...
July 3, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28700384/update-on-graves-disease-advances-in-treatment-of-mild-moderate-and-severe-thyroid-eye-disease
#13
Diego Strianese
PURPOSE OF REVIEW: To report the most recent therapeutic advances of thyroid eye disease (TED) and offer general recommendations for management of TED. RECENT FINDINGS: Treatment of Graves ophthalmopathy is traditionally based on the use of high doses of corticosteroids and/or radiotherapy (RT) to decrease the activity of the disease, with the subsequent proptosis, strabismus and eyelid deformites treated with different surgical procedures. In recent years, the evidence that oxidative stress plays a relevant role in exacerbating TED severity has encouraged the use of antioxydative agents such as selenium, which has shown a capacity in limiting the disease progression...
July 11, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28699904/the-anti-apoptotic-bag3-protein-is-involved-in-braf-inhibitor-resistance-in-melanoma-cells
#14
Luana Guerriero, Giuseppe Palmieri, Margot De Marco, Antonio Cossu, Paolo Remondelli, Mario Capunzo, Maria Caterina Turco, Alessandra Rosati
BAG3 protein, a member of BAG family of co-chaperones, has a pro-survival role in several tumour types. BAG3 anti-apoptotic properties rely on its characteristic to bind several intracellular partners, thereby modulating crucial events such as apoptosis, differentiation, cell motility, and autophagy. In human melanomas, BAG3 positivity is correlated with the aggressiveness of the tumour cells and can sustain IKK-γ levels, allowing a sustained activation of NF-κB. Furthermore, BAG3 is able to modulate BRAFV600E levels and activity in thyroid carcinomas...
June 30, 2017: Oncotarget
https://www.readbyqxmd.com/read/28689519/insulin-resistance-and-glucose-levels-in-subjects-with-subclinical-hypothyroidism
#15
Sikandar Hayat Khan, Nadeem Fazal, Aamir Ijaz, Syed Mohsin Manzoor, Naveed Asif, Tariq Rafi, Muhammad Yasir, Najmusaquib Khan Niazi
OBJECTIVE: To compare insulin resistance and glycemic indicators among subjects with euthyroidism and subclinical hypothyroidism. STUDY DESIGN: Comparative cross-sectional study. PLACE AND DURATION OF STUDY: Department of Pathology and Medicine, PNS Hafeez, Islamabad, in collaboration with the Department of Chemical Pathology and Endocrinology at the Armed Forces Institute of Pathology (AFIP), Rawalpindi, from December 2015 to September 2016...
June 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28687563/axitinib-treatment-in-advanced-rai-resistant-differentiated-thyroid-cancer-dtc-and-refractory-medullary-thyroid-cancer-mtc
#16
Jaume Capdevila, Jose Manuel Trigo, Javier Aller, Jose Luis Manzano, Silvia Garcia-Adrian, Carles Zafon, Oscar Reig, Uriel Bohn, Teresa Ramon Y Cajal, Manuel Duran, Beatriz Gonzalez-Astorga, Ana Lopez-Alfonso, Javier Medina, Ignacio Porras, Juan Jose Reina, Nuria Palacios, Enrique Grande, Elena Cillan, Ignacio Matos, Juan Jose Grau
BACKGROUND: Axitinib, an antiangiogenic multikinase inhibitor (MKI) was evaluated in the compassionate-use-program in Spain (October 2012-November 2014). MATERIALS AND METHODS: 47 patients with advanced radioactive iodine-refractory differentiated thyroid cancer (DTC, n=34) or medullary thyroid cancer (MTC, n=13) with documented disease progression were treated with axitinib 5 mg bid. The primary efficacy endpoint was overall response rate (ORR) by RECIST v1.1. Progression-free survival (PFS) and adverse events (AEs) were secondary objectives...
July 7, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28674771/a-review-of-the-physiology-of-a-survival-expert-of-big-freeze-deep-snow-and-an-empty-stomach-the-boreal-raccoon-dog-nyctereutes-procyonoides
#17
REVIEW
Anne-Mari Mustonen, Petteri Nieminen
The raccoon dog (Nyctereutes procyonoides) is an invasive canid originating from eastern Asia. Here, we review its physiological adaptations to wintering, with an emphasis on northern Europe, where the raccoon dog spends the coldest part of the year in winter sleep. The timing of physiological changes related to wintering is connected to photoperiod by melatonin. In preparation to winter, raccoon dogs display autumnal hyperphagia and fattening probably regulated by the interaction of several peptide hormones...
July 4, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28670258/insulin-resistance-diabetes-mellitus-and-thyroid-dysfunction-in-patients-with-palmoplantar-pustulosis-a-case-controlled-study
#18
Hatice Ataş, Müzeyyen Gönül
INTRODUCTION: Palmoplantar pustulosis (PPP) is a chronic pustular inflammatory skin disease; however, its pathogenesis is not well understood. Several factors, such as genetics, tobacco use and autoimmune issues, may contribute to this disease. AIM: This research was conducted to investigate the relationships between insulin resistance, thyroid disease and PPP. MATERIAL AND METHODS: Thirty-three patients with PPP and 27 age- and gender-matched controls were analysed for their smoking histories, thyroid function tests, anti-thyroid peroxidase antibody (anti-TPO) levels, fasting glucose, fasting insulin levels and the homeostatic model assessment (HOMA) index for insulin resistance...
June 2017: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/28662033/a-phase-i-study-of-pazopanib-in-combination-with-escalating-doses-of-131i-in-patients-with-well-differentiated-thyroid-carcinoma-borderline-refractory-to-radioiodine
#19
Laura Q Chow, Rafael Santana-Davila, Austin Pantel, Mara Roth, Leslie N Anderson, Alan Failor, Robert Doot, David Mankoff
OBJECTIVE: This trial was conducted to evaluate the ability of pazopanib to overcome therapeutic 131I resistance. MATERIALS, METHODS AND PATIENTS: This phase 1 trial assesses the combination of pazopanib and escalating doses of radioiodine (131I) in patients with recurrent or metastatic thyroid cancer that are borderline or relatively iodine refractory. Radioiodine uptake scans were assessed post therapy and compared to historical pre-treatment scans. Patients underwent FDG PET/CT before and after the initial pazopanib treatment to identify the impact of pazopanib on the cancer prior to 131I therapy...
2017: PloS One
https://www.readbyqxmd.com/read/28658938/low-thyroid-hormone-levels-disrupt-thyrotrope-development
#20
Ksenia Tonyushkina, Stefanie Krug, Theresa Ortiz-Toro, Tibor Mascari, Rolf Karlstrom
Low thyroid hormone (TH) conditions caused by a variety of pre- and perinatal problems have been shown to alter postnatal regulatory thyrotropin (TSH) responsiveness to TH in humans and rodents. The mechanisms underlying this pituitary TH-resistance remain unknown. Here we use the evolutionarily conserved zebrafish model to examine the effects of low TH on thyrotrope development and function. Zebrafish were exposed to the goitrogen 6-propyl-2-thiouracil (PTU) in order to block TH synthesis and this led to an approximately 50% increase in thyrotrope numbers and a 8-10 fold increase in tshb mRNA abundance in 2 week old larvae and 1 month old juveniles...
June 27, 2017: Endocrinology
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