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Thyroid AND reproduction

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https://www.readbyqxmd.com/read/29323457/impact-of-subchronic-exposure-to-triclosan-and-or-fluoride-on-estrogenic-activity-in-immature-female-rats-the-expression-pattern-of-calbindin-d9k-and-estrogen-receptor-%C3%AE-genes
#1
Yasmina M Abd-Elhakim, Amany T Mohammed, Haytham A Ali
This study explored the influence of triclosan (TCS) in the absence and presence of sodium fluoride (NaF) on estrogenic activity and thyroid function of adolescent female rats. The results indicated that the individual exposure to TCS evoked a significant decline in T3 and T4 but the levels of estradiol, FSH, and LH were significantly elevated beside marked up regulation of calbindin-D9k and estrogen α mRNA expression. On the other hand, the single exposure to NaF causes insignificant changes in thyroid hormones, but evoked a trend toward an increase in both estradiol and LH levels...
January 11, 2018: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29297967/levothyroxine-supplementation-improves-serum-anti-m%C3%A3-llerian-hormone-levels-in-infertile-patients-with-hashimoto-s-thyroiditis
#2
Masako Kuroda, Keiji Kuroda, Tomoya Segawa, Jaeduk Y Noh, Ai Yoshihara, Koichi Ito, Hisao Osada, Satoru Takeda, Shokichi Teramoto
AIM: Thyroid dysfunction and autoimmunity are associated with an adverse effect on fertility. An aberrant high thyroid stimulating hormone level is associated with diminished ovarian reserve in women of reproductive age; however, the utility of levothyroxine (LT4) replacement for infertile patients with subclinical hypothyroidism is still under discussion. The aim of this study was to investigate whether LT4 supplementation for infertile patients with subclinical hypothyroidism improves impaired ovarian function...
January 3, 2018: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29295655/-not-tonight-zebrafish-the-effects-of-ruta-graveolens-on-reproduction
#3
Mohammad Navid Forsatkar, Maryam HedayatiRad, Ana Carolina Luchiari
CONTEXT: There is growing interest in the pharmacological evaluation of Rue due to its potential to treat a variety of clinical diseases. The plant seems to present potent endocrine disrupting effects, and its excretion and disposal are not a concern. OBJECTIVE: The effects of Ruta graveolens L. (Rutaceae) ethanol extract (RE) on reproductive behaviour, fertility, and steroid and thyroid hormone levels in zebrafish were investigated. MATERIAL AND METHODS: We exposed subjects to varying concentrations of RE, and one-tenth the LC50 concentration (2...
December 2018: Pharmaceutical Biology
https://www.readbyqxmd.com/read/29250686/ovarian-strumal-carcinoid-case-report
#4
Delia Gabriela Ciobanu Apostol, Tudor Andrei BuŢureanu, Demetra Gabriela Socolov, Daniela Claudia Scripcaru, Oana LuminiŢa Rosin, Ludmila Lozneanu
Strumal carcinoid represents a rare form of ovarian teratoma, consisting of both thyroid tissue and carcinoid structures. The carcinoid component is a well-differentiated neuroendocrine tumor with excellent prognosis. Strumal carcinoid tumors are commonly found in peri-menopausal women who are not usually interested in preserving their fertility and who are thus open to radical surgical treatment. In this report, we present a 24-year-old, nulliparous patient with strumal carcinoid, confirmed by histopathology and a large panel of immunohistochemistry (IHC) markers, who wished to preserve her fertility...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/29249510/bone-health-and-endocrine-comorbidities-in-pediatric-epilepsy
#5
Nancy A McNamara, Erin Marie Fedak Romanowski, David P Olson, Renee A Shellhaas
Antiseizure medications and dietary therapies have associated effects on the endocrine system. We provided an overview of the relationship between epilepsy treatment and bone health in children with epilepsy. Additionally, we discussed the effects of epilepsy treatment on other endocrine systems including thyroid function, growth, reproduction, and weight. The effect of epilepsy on bone health is multifactorial; there are direct and indirect effects of medication and dietary treatments as well as a decrease in physical activity, decreased sunlight exposure, decreased vitamin D levels, and additional comorbidities...
November 2017: Seminars in Pediatric Neurology
https://www.readbyqxmd.com/read/29246752/autoimmune-thyroid-disease-during-pregnancy
#6
REVIEW
Simone De Leo, Elizabeth N Pearce
Understanding of changes in thyroid function and the consequences of thyroid disease during pregnancy has rapidly grown in the past two decades, and revised American Thyroid Association guidelines on this topic were published in 2017. This Review explores the association between thyroid autoimmunity and complications during and after pregnancy. Thyroid autoimmunity refers to the presence of antibodies to thyroperoxidase or thyroglobulin, or thyroid-stimulating hormone receptor antibodies (TRAbs), or a combination of these, and is present in up to 18% of pregnant women...
December 12, 2017: Lancet Diabetes & Endocrinology
https://www.readbyqxmd.com/read/29230292/multiple-steroid-and-thyroid-hormones-detected-in-baleen-from-eight-whale-species
#7
Kathleen E Hunt, Nadine S Lysiak, Jooke Robbins, Michael J Moore, Rosemary E Seton, Leigh Torres, C Loren Buck
Recent studies have demonstrated that some hormones are present in baleen powder from bowhead (Balaena mysticetus) and North Atlantic right (Eubalaena glacialis) whales. To test the potential generalizability of this technique for studies of stress and reproduction in large whales, we sought to determine whether all major classes of steroid and thyroid hormones are detectable in baleen, and whether these hormones are detectable in other mysticetes. Powdered baleen samples were recovered from single specimens of North Atlantic right, bowhead, blue (Balaenoptera [B...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/29229361/a-literature-review-on-maternal-fetal-and-reproductive-disorders-of-toxoplasma-gondii-infection
#8
REVIEW
Shirzad Fallahi, Ali Rostami, Malihe Nourollahpour Shiadeh, Hamed Behniafar, Shahrokh Paktinat
BACKGROUND: Toxoplasma gondii infection is one of the most prevalent infectious disease with worldwide distribution. Congenital toxoplasmosis is annually responsible for 1.20 million disability-adjusted life years around the world, but often it is overlooked many countries. METHODS: We performed an updated review to summarize the current researches on fetal, neonatal and maternal consequences of T. gondii infection and also adverse effects of toxoplasmosis on women reproductive organs...
December 8, 2017: Journal of Gynecology Obstetrics and Human Reproduction
https://www.readbyqxmd.com/read/29224107/sex-dependent-role-of-estrogen-sulfotransferase-and-steroid-sulfatase-in-metabolic-homeostasis
#9
Wojciech G Garbacz, Mengxi Jiang, Wen Xie
Sulfonation and desulfation are two opposing processes that represent an important layer of regulation of estrogenic activity via ligand supplies. Enzymatic activities of families of enzymes, known as sulfotransferases and sulfatases, lead to structural and functional changes of the steroids, thyroids, xenobiotics, and neurotransmitters. Estrogen sulfotransferase (EST) and steroid sulfatase (STS) represent negative and positive regulation of the estrogen activity, respectively. This is because EST-mediated sulfation deactivates estrogens, whereas STS-mediated desulfation converts the inactive estrogen sulfates to active estrogens...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29223282/the-hypothalamic-pituitary-thyroid-axis-and-biological-rhythms-the-discovery-of-tsh-s-unexpected-role-using-animal-models
#10
REVIEW
Keisuke Ikegami, Takashi Yoshimura
Thyroid hormones (TH) are important for development, growth, and metabolism. It is also clear that the synthesis and secretion of TH are regulated by the hypothalamic-pituitary-thyroid (HPT) axis. Animal models have helped advance our understanding of the roles and regulatory mechanisms of TH. The animals' bodies develop through coordinated timing of cell division and differentiation. Studies of frog metamorphosis led to the discovery of TH and their role in development. However, to adapt to rhythmic environmental changes, animals also developed various endocrine rhythms...
October 2017: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29217167/potential-protective-effect-of-pistacia-lentiscus-oil-against-chlorpyrifos-induced-hormonal-changes-and-oxidative-damage-in-ovaries-and-thyroid-of-female-rats
#11
Samira Chebab, Fatiha Mekircha, Essaid Leghouchi
The purpose of this study was to evaluate the protective effect of Pistacia lentiscus oil (PLO), known for its antioxidant properties, on chlorpyrifos (CPF)-induced alterations in the thyroid, reproductive hormone levels, and oxidative damage in the ovaries and thyroid of adult Wistar rats. The animals were treated with orally administered PLO (2 mL/kg), CPF (6.75 mg/kg), and a combination of CPF and PLO for 30 days. Serum levels of luteinizing hormone (LH), follicle-stimulating hormone (FSH), progesterone (Pg), estradiol (E2), triiodothyronine (T3), thyroxine (T4), and thyroid-stimulating hormone (TSH) were assessed using chemiluminescence assay...
December 4, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29214681/thyroid-hormones-alter-estrous-cyclicity-and-antioxidative-status-in-the-ovaries-of-rats
#12
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...
December 7, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/29210006/triiodothyronine-differentially-modulates-the-lh-and-fsh-synthesis-and-secretion-in-male-rats
#13
Renata Marino Romano, Paula Bargi-Souza, Erika Lia Brunetto, Francemilson Goulart-Silva, Renato M Salgado, Telma Maria Tenorio Zorn, Maria Tereza Nunes
Hypothyroidism and thyrotoxicosis produce adverse effects in male reproduction by unknown mechanisms. We investigated whether triiodothyronine (T3) modulates luteinizing hormone (LH) and follicle stimulating hormone (FSH) synthesis/secretion, by inducing different thyroid states. In hypothyroidism, the content of Lhb and Fshb mRNAs was increased, while their association to ribosomes and the protein content were reduced and the serum LH and FSH concentrations were augmented and decreased, respectively. Thyrotoxicosis reduced Lhb mRNA and LH serum concentration, and increased Lhb mRNA translational rate...
December 5, 2017: Endocrine
https://www.readbyqxmd.com/read/29204256/reproductive-disturbances-among-saudi-adolescent-girls-and-young-women-with-type-1-diabetes-mellitus
#14
Rim Braham, Asirvatham Alwin Robert, Maha Ali Musallam, Abdulaziz Alanazi, Nawaf Bin Swedan, Mohamed Abdulaziz Al Dawish
AIM: To identify reproductive disturbances among adolescent girls and young women with type 1 diabetes mellitus (T1DM) in Saudi Arabia. METHODS: This cross sectional study was conducted among 102 female with T1DM, (aged 13-29 years) who attended the Diabetes Clinic at Diabetes Treatment Center, Prince Sultan Military Medical City, Saudi Arabia between April 2015 to March 2016. Clinical history, anthropometric characteristics and reproductive disturbance were collected through a questionnaire...
November 15, 2017: World Journal of Diabetes
https://www.readbyqxmd.com/read/29187856/a-role-for-iodide-and-thyroglobulin-in-modulating-the-function-of-human-immune-cells
#15
Mahmood Y Bilal, Svetlana Dambaeva, Joanne Kwak-Kim, Alice Gilman-Sachs, Kenneth D Beaman
Iodine is an essential element required for the function of all organ systems. Although the importance of iodine in thyroid hormone synthesis and reproduction is well known, its direct effects on the immune system are elusive. Human leukocytes expressed mRNA of iodide transporters (NIS and PENDRIN) and thyroid-related proteins [thyroglobulin (TG) and thyroid peroxidase (TPO)]. The mRNA levels of PENDRIN and TPO were increased whereas TG transcripts were decreased post leukocyte activation. Flow cytometric analysis revealed that both PENDRIN and NIS were expressed on the surface of leukocyte subsets with the highest expression occurring on monocytes and granulocytes...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29179258/increased-risk-of-autoimmune-disorders-in-infertile-men-analysis-of-us-claims-data
#16
W D Brubaker, S Li, L C Baker, M L Eisenberg
Aberrations in reproductive fitness may be a harbinger of medical diseases in men. Existing data suggest that female infertility is associated with autoimmune disorders; however, this has not been examined in men. As immune surveillance and hormonal factors can impact male fertility and autoimmunity, we sought to determine the association between male infertility and incident autoimmune disorders. We analyzed subjects from the Truven Health MarketScan claims database from 2001 to 2008. Infertile men were identified through diagnosis and treatment codes...
January 2018: Andrology
https://www.readbyqxmd.com/read/29174305/perinatal-hypothyroidism-increases-play-behaviors-in-juvenile-rats
#17
Spencer G Smith, Katharine V Northcutt
Thyroid hormones play an instrumental role in the development of the central nervous system. During early development, the fetus is dependent on maternal thyroid hormone production due to the dysfunction of its own thyroid gland. Thus, maternal thyroid dysfunction has been shown to elicit significant abnormalities in neural development, neurochemistry, and behavior in offspring. Previous reports have suggested that human maternal hypothyroidism may increase the chances of having children with autism spectrum disorder and attention-deficit/hyperactivity disorder...
November 21, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29162533/derivation-of-an-oral-reference-dose-rfd-for-di-2-ethylhexyl-cyclohexan-1-4-dicarboxylate-dehch-an-alternative-to-phthalate-plasticizers
#18
Brian J Hughes, Kevin Cox, Virunya Bhat
Di 2-ethylhexyl cyclohexane-1,4-dicarboxylate (DEHCH, CAS 84731-70-4) is an ester of polycarboxylic acid assessed in a wide variety of ecotoxicological and mammalian toxicity assays as a substitute for phthalate ester-type plasticizers. Laboratory animal data indicate that DEHCH has a low acute oral and dermal toxicity, is non-irritating to the skin and eyes, and is a non-sensitizer. In an OECD 422 combined repeat dose toxicity study with a reproductive/developmental toxicity screening test in Sprague-Dawley rats, minimal effects were observed on the liver, spleen, and thyroid...
November 18, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29156995/combined-repeated-dose-and-reproductive-developmental-toxicity-screening-test-of-benzene-1-1-oxybis-tetrapropylene-derivs-in-rats
#19
Yasuhiro Tsubokura, Ryuichi Hasegawa, Sunao Aso, Toshio Kobayashi, Takayuki Koga, Satsuki Hoshuyama, Yutaka Oshima, Katsumi Miyata, Yuji Kusune, Takako Muroi, Naoki Hashizume, Yoshiyuki Inoue, Shozo Ajimi, Kotaro Furukawa
We have conducted animal toxicity tests of chemicals for a chemical safety program implemented by the Ministry of Economy, Trade and Industry of Japan. Here we conducted a combined repeated-dose and reproductive/developmental toxicity screening test of benzene, 1,1'-oxybis-, tetrapropylene derivs. (BOTD). BOTD was administered to 9-week-old Crl:CD(SD) male and female rats by gavage at 0, 40, 200, or 1000 mg/kg/day. Males were treated for 42 days including mating period. Females were treated for 42-53 days through the premating, mating, pregnancy, and until Day 4 of lactation periods...
November 20, 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/29155610/seasonal-and-sexual-variation-in-metabolism-thermoregulation-and-hormones-in-the-big-brown-bat-eptesicus-fuscus
#20
Christopher S Richardson, Tim Heeren, Thomas H Kunz
In response to seasonal variation in energy availability and thermal environment, physiological and endocrine mechanisms have evolved in temperate zone animals. Seasonal changes in hormone activity affect metabolism, body temperature, and reproductive activity. We examined the seasonal regulatory role of hormones on basal metabolic rate (BMR) and regulatory nonshivering thermogenesis (RNST) in 98 female and 17 male adult Eptesicus fuscus (big brown bat). We measured BMR, RNST, and plasma levels of thyroid hormone (T3), leptin, and cortisol in bats captured in maternity colonies in eastern Massachusetts from May to August (from arousal from the hibernation phase to the prehibernation phase)...
January 2018: Physiological and Biochemical Zoology: PBZ
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