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https://www.readbyqxmd.com/read/29767691/thyroid-hormones-and-female-reproduction
#1
Juneo F Silva, Natália M Ocarino, Rogéria Serakides
Thyroid hormones are vital for the proper functioning of the female reproductive system, since they modulate the metabolism and development of ovarian, uterine and placental tissues. Therefore, hypo- and hyperthyroidism may result in subfertility or infertility in both women and animals. Other well-documented sequelae of maternal thyroid dysfunctions include menstrual/estral irregularity, anovulation, abortion, preterm delivery, preeclampsia, intrauterine growth restriction, postpartum thyroiditis, and mental retardation in children...
May 14, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29742817/effects-of-thyroid-dysfunction-on-reproductive-hormones-in-female-rats
#2
Juan Liu, Meng Guo, Xusong Hu, Xuechun Weng, Ye Tian, Kaili Xu, Dai Heng, Wenbo Liu, Yu Ding, Yanzhou Yang, Cheng Zhang
Thyroid hormones (THs) play a critical role in the development of ovarian cells. Although the effects of THs on female reproduction are of great interest, the mechanism remains unclear. We investigated the effects of TH dysregulation on reproductive hormones in rats. Propylthiouracil (PTU) and L-thyroxine were administered to rats to induce hypo- and hyper-thyroidism, respectively, and the reproductive hormone profiles were analyzed by radioimmunoassay. Ovarian histology was evaluated with H&E staining, and gene protein level or mRNA content was analyzed by western blotting or RT-PCR...
May 10, 2018: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/29651216/linear-analysis-of-autonomic-activity-and-its-correlation-with-creatine-kinase-mb-in-overt-thyroid-dysfunctions
#3
Manisha Mavai, Yogendra Raj Singh, R C Gupta, Sandeep K Mathur, Bharti Bhandari
Autonomic activity may be deranged in thyroid dysfunctions and may lead to cardiovascular morbidity and mortality. Myopathy is a common manifestation in thyroid disorders and may be associated with raised serum creatine kinase (CK). We hypothesized that cardiovascular abnormality in thyroid dysfunction may manifest as raised CK-MB. This study was designed to investigate the correlation of CK and its isoform CK-MB with thyroid profile and linear parameters of heart rate variability (HRV). The study was conducted on 35 hypothyroid and hyperthyroid patients each, and 25 age-matched healthy controls...
April 2018: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/29626530/high-fat-diet-affects-gut-nutrients-transporters-in-hypo-and-hyperthyroid-mice-by-ppar-a-independent-mechanism
#4
Mariana Cerqueira Losacco, Carolina Fernanda Theodora de Almeida, Andressa Harumi Torelli Hijo, Paula Bargi-Souza, Patricia Gama, Maria Tereza Nunes, Francemilson Goulart-Silva
AIMS: High fat diet consumes and thyroid hormones (THs) disorders may affect nutrients metabolism, but their impact on the absorptive epithelium, the first place of nutrients access, remains unknown. Our aim was to evaluate the intestinal morphology and nutrients transporters content in mice fed standard (LFD) or high fat (HFD) diets in hypo or hyperthyroidism-induced condition. MATERIAL AND METHODS: C57BL/6 male mice fed LFD or HFD diets for 12 weeks, followed by saline, PTU (antithyroid drug) or T3 treatment up to 30 days...
April 4, 2018: Life Sciences
https://www.readbyqxmd.com/read/29620644/intrathyroidal-ectopic-thymus-in-children-a-benign-lesion
#5
Myung Hoon Bang, JinShik Shin, Kwan Seop Lee, Min Jae Kang
As ultrasound is commonly used these days, more and more lesions are found incidentally, including simple cysts, isoechoic nodules, and hypoechoic nodules, such as ectopic thymus. We here report the prevalence of ectopic thymus and its natural course.We retrospectively reviewed the charts of 690 subjects (342 males, 348 females) who were under 18 years old and had undergone neck or thyroid ultrasound at Hallym University Sacred Heart Hospital from January 2014 to June 2017. Ectopic thymus was defined when the incidental lesion was hypo- to iso-echoic compared to adjacent muscles with vascularity and did not have a connection to the thymus in the mediastinum...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29575022/prevalence-and-sonographic-features-of-ectopic-thyroidal-thymus-in-children-a-retrospective-analysis
#6
Adalet Elcin Yildiz, Atilla Halil Elhan, Suat Fitoz
PURPOSE: To assess the prevalence of ectopic thyroidal thymus tissue detected by sonography (US) in children and to analyze the US features. METHODS: We retrospectively reviewed images of 216 children who had undergone a thyroid or neck US examination from February 2015 to June 2015. Lesions within or adjacent to the thyroid gland that showed echopatterns consistent with thymic tissue were diagnosed as ectopic thyroidal thymus tissue. Lesions were reviewed according to their side, location, level, size, shape, echo pattern, internal content, and vascularization...
March 25, 2018: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/29571793/predictive-quantitative-sonographic-features-on-classification-of-hot-and-cold-thyroid-nodules
#7
Ali Abbasian Ardakani, Ali Mohammadzadeh, Nahid Yaghoubi, Zahra Ghaemmaghami, Reza Reiazi, Amir Homayoun Jafari, Sepideh Hekmat, Mohammad Bagher Shiran, Ahmad Bitarafan-Rajabi
PURPOSE: This study investigated the potentiality of ultrasound imaging to classify hot and cold thyroid nodules on the basis of textural and morphological analysis. METHODS: In this research, 42 hypo (hot) and 42 hyper-function (cold) thyroid nodules were evaluated through the proposed method of computer aided diagnosis (CAD) system. To discover the difference between hot and cold nodules, 49 sonographic features (9 morphological, 40 textural) were extracted. A support vector machine classifier was utilized for the classification of LNs based on their extracted features...
April 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29473461/primary-aldosteronism-and-thyroid-disorders-in-atrial-fibrillation-a-swedish-nationwide-case-control-study
#8
Georgios Mourtzinis, Samuel Adamsson Eryd, Annika Rosengren, Lena Björck, Martin Adiels, Gudmundur Johannsson, Karin Manhem
Background Atrial fibrillation is associated with hyperthyroidism. Patients with primary aldosteronism have an increased prevalence of atrial fibrillation. However, the prevalence of primary aldosteronism in the atrial fibrillation population is unknown. Aim This nationwide case-control study aimed to compare the prevalence of primary aldosteronism and thyroid disorders in patients with atrial fibrillation with that of age- and sex-matched controls. Methods We identified all atrial fibrillation cases in Sweden between 1987 and 2013 ( n = 713,569) by using the Swedish National Patient Register...
May 2018: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/29472113/revised-value-of-contrast-enhanced-ultrasound-for-solid-hypo-echoic-thyroid-nodules-graded-with-the-thyroid-imaging-reporting-and-data-system
#9
YanFang Wang, Fang Nie, Ting Liu, Dan Yang, Qi Li, Jing Li, AiLing Song
The use of ultrasound in differentiation of benign and malignant solid hypo-echoic thyroid nodules is a dilemma in clinical practice. The aim of this study was to investigate the revised value of contrast-enhanced ultrasound (CEUS) for differentiating solid hypo-echoic thyroid nodules using the Thyroid Imaging Reporting and Data System (TI-RADS).The study included 135 patients with 135 nodules confirmed by fine-needle aspiration and/or surgery. Every nodule underwent both conventional US and CEUS. Binary logistic regression analysis for conventional US features revealed that irregular shape, microcalcification and height greater than width were significant malignant predictive features...
May 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29452573/the-effect-of-metformin-treatment-in-obese-insulin-resistant-patients-with-euthyroid-goiter
#10
Nicoleta Răcătăianu, Sorana Daniela Bolboacă, Adela-Viviana Sitar-Tăut, Smaranda Mârza, Daniela Moga, Ana Valea, Cristina Ghervan
Objective The study's objective was to evaluate the thyroid parameters in obese insulin-resistant patients with euthyroid diffuse or nodular goiter, following Metformin treatment. Patients and methods The study was experimental, open, and prospective. Fifty-three patients aged 18-68 were enrolled for two years. Obese insulin-resistant patients (cut-off Homeostasis-Model-Assessment of Insulin Resistance-HOMA-IR ≥ 2.5) with euthyroid nodular/diffuse goiter were included. Subjects with diabetes, hypo-/hyper-thyroidism, autoimmune thyroiditis, psychiatric disorders, liver or heart failure were excluded...
February 16, 2018: Acta Clinica Belgica
https://www.readbyqxmd.com/read/29407445/thyroid-hormone-role-and-economy-in-the-developing-testis
#11
Arturo Hernandez
Thyroid hormones (TH) exhibit pleiotropic regulatory effects on growth, development, and metabolism, and it is becoming increasingly apparent that the developing testis is an important target for them. Testicular development is highly dependent on TH status. Both hypo- and hyperthyroidism affect testis size and the proliferation and differentiation of Sertoli, Leydig, and germ cells, with consequences for steroidogenesis, spermatogenesis, and male fertility. These observations suggest that an appropriate content of TH and by implication TH action in the testis, whether the result of systemic hormonal levels or regulatory mechanisms at the local level, is critical for normal testicular and reproductive function...
2018: Vitamins and Hormones
https://www.readbyqxmd.com/read/29354015/quality-of-life-in-patients-treated-with-percutaneous-laser-ablation-for-non-functioning-benign-thyroid-nodules-a-prospective-single-center-study
#12
Silvia Oddo, Edineia Felix, Michele Mussap, Massimo Giusti
Objective: While many studies have reported that laser ablation (LA) for benign non-fuctioning thyroid nodules is efficacious in reducing nodular volume and neck symptoms, none have described changes in quality of life (QoL). The purpose of this study was to report post-LA changes in QoL in our cohort of patients. Materials and Methods: Fourteen patients with benign thyroid nodules were involved in a prospective, single-center study and underwent a single session of LA...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29319359/secondary-and-tertiary-preventions-of-thyroid-disease
#13
Fereidoun Azizi, Ladan Mehran, Farhad Hosseinpanah, Hossein Delshad, Atieh Amouzegar
INTRODUCTION: Secondary and tertiary preventions are concerned with the recognition of the disease process in a very early stage and delay in progression to complete disease and minimization of complications and the impact of illness. METHODS: All articles related to secondary and tertiary prevention of thyroid diseases were reviewed. Using related key words, articles published between 2001 and 2015 were evaluated, categorized, and analyzed. RESULTS: In secondary prevention, congenital hypothyroidism and subclinical hypo and hyperthyroidism are equally important...
January 10, 2018: Endocrine Research
https://www.readbyqxmd.com/read/29319139/the-role-of-99mtc-dtpa-retrobulbar-spect-in-staging-and-follow-up-of-graves-orbitopathy
#14
László Galuska, Sándor Barna, József Varga, Ildikó Garai, Endre V Nagy
The pathogenesis of Graves' orbitopathy (GO) is not completely understood. Coexistent hyperfunction of the thyroid gland is frequent; however, GO may also coexist with hypo- or euthyrodism. The course of GO is largely independent of thyroid function, although elevated serum TSH is known to negatively interfere with GO course. GO is severe in 10 % of the cases; sight threatening complications may also develop. A successful therapy of GO requires the assesment of both the severity and activity of orbital inflammation...
January 10, 2018: Nuclear Medicine Review. Central & Eastern Europe
https://www.readbyqxmd.com/read/29275887/subclinical-hypothyroidism-is-associated-with-adverse-prognosis-in-heart-failure-patients
#15
Yu Sato, Akiomi Yoshihisa, Yusuke Kimishima, Takatoyo Kiko, Shunsuke Watanabe, Yuki Kanno, Satoshi Abe, Makiko Miyata, Takamasa Sato, Satoshi Suzuki, Masayoshi Oikawa, Atsushi Kobayashi, Takayoshi Yamaki, Hiroyuki Kunii, Kazuhiko Nakazato, Takafumi Ishida, Yasuchika Takeishi
BACKGROUND: It is widely recognized that overt hyper- as well as hypothyroidism are potential causes of heart failure (HF). Additionally it has been recently reported that subclinical hypothyroidism (sub-hypo) is associated with atherosclerosis, development of HF, and cardiovascular death. We aimed to clarify the effect of sub-hypo on prognosis of HF, and underlying hemodynamics and exercise capacity. METHODS: We measured the serum levels of thyroid stimulating hormone (TSH) and free thyroxine (FT4) in 1100 consecutive HF patients...
January 2018: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/29214681/thyroid-hormones-alter-estrous-cyclicity-and-antioxidative-status-in-the-ovaries-of-rats
#16
Quanwei Wei, Jaafar Sulieman Fedail, Lingfa Kong, Kaizhi Zheng, Chunhua Meng, Mohamed Babo Fadlalla, Fangxiong Shi
To expand our understanding of the roles of thyroid hormones on female reproduction, we induced hypo- and hyper-T rat models to investigate the roles of thyroid hormones on estrous cyclicity, as well as the antioxidative status in the ovaries of rats. In the current study, our data show that hypothyroidism (hypo-T) and hyperthyroidism (hyper-T) led to significantly reduced body weights and ovarain weights and delayed vaginal opening day. For hyper-T, thyroxine (T4), tri-iodothyronine (T3), progesterone (P4) and follicle-stimulating hormone (FSH) were significantly increased, while estradiol (E2) and luteinizing hormone (LH) were significantly decreased...
March 2018: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/29197093/the-association-between-irisin-and-muscle-metabolism-in-different-thyroid-disorders
#17
Ariadna Zybek-Kocik, Nadia Sawicka-Gutaj, Ewelina Szczepanek-Parulska, Mirosław Andrusiewicz, Joanna Waligórska-Stachura, Piotr Białas, Tomasz Krauze, Przemysław Guzik, Jerzy Skrobisz, Marek Ruchała
BACKGROUND: Irisin is a new adipo-myokine, encoded by the FNDC5 gene. Currently, there is a discussion regarding the relation between thyroid function and irisin concentration. This prospective study assesses the influence of thyrometabolic changes on serum irisin concentration in association with altered muscle metabolism. This is performed on a large cohort of patients affected by severe hypo- or hyperthyroidism, as well as by the expression of the FNDC5 gene in thyroid tissue affected by different pathologies...
March 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29182513/both-hypothyroidism-and-hyperthyroidism-increase-plasma-irisin-levels-in-rats
#18
Emine Atici, Rasim Mogulkoc, Abdulkerim Kasim Baltaci, Esma Menevse
Background A recently discovered hormone, irisin is accepted to be significantly involved in the regulation of body weight. Thyroid functions may be, directly or indirectly, associated with irisin. Aim The aim of the present study is to determine the effect of experimental thyroid dysfunction on irisin levels in rats. Methods The study registered 40 adult male Sprague-Dawley rats, which were allocated to groups as follows: 1. Control; 2. Hypothyroidism induced by injection of 10 mg/kg/day intraperitoneal propylthiouracil (PTU) for 3 weeks; 3...
November 28, 2017: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/29162475/-thyrotropin-reference-ranges-during-pregnancy-in-the-province-of-huelva-spain
#19
A Ortega Carpio, I Vázquez Rico, M A Castaño López, L Duarte González, M Montilla Álvaro, A Ruiz Reina
OBJECTIVE: The correct diagnosis of hypothyroidism during pregnancy requires knowledge of the local trimester-specific thyrotropin (TSH) reference ranges. When these are not available, the guidelines recommend upper limits of 2.5, 3.0, and 3.0μU/ml for the 1(st), 2(nd), and 3(rd) trimesters, respectively. The aim is to establish the reference range for our local population. MATERIAL AND METHODS: A population-based observational study was performed on healthy pregnant women from 11 healthcare centres in the province of Huelva...
November 18, 2017: Semergen
https://www.readbyqxmd.com/read/29111822/repercussions-of-hypo-and-hyperthyroidism-on-the-heart-circadian-clock
#20
Rodrigo A Peliciari-Garcia, Paula Bargi-Souza, Martin E Young, Maria Tereza Nunes
Myocardial gene expression and metabolism fluctuate over the course of the day in association with changes in energy supply and demand. Time-of-day-dependent oscillations in myocardial processes have been linked to the intrinsic cardiomyocyte circadian clock. Triiodothyronine (T3) is an important modulator of heart metabolism and function. Recently, our group has reported time-of-day-dependent rhythms in cardiac T3 sensitivity, as well as, T3-mediated acute alterations on core clock components. Hypo and hyperthyroidism are the second most prevalent endocrine disease worldwide...
February 2018: Chronobiology International
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