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Thyroid AND reproduction

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https://www.readbyqxmd.com/read/27908417/biphasic-action-of-iodine-in-excess-at-different-doses-on-ovary-in-adult-rats
#1
Dakshayani Mahapatra, Amar K Chandra
Iodine consumption in excess of its recommended levels over a prolonged period of time is well known to cause thyroid disorders. The thyroid hormones on the other hand are responsible in maintenance of the physiology of the reproductive system. Excess iodine intake affects male reproductive physiology. However, the effects of excess iodine on the ovarian structure and function is yet to be established. The present study has thus been undertaken to investigate the effect of excess iodine on the ovarian physiology...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27902923/kisspeptin-expression-is-decreased-in-the-arcuate-nucleus-of-hypothyroid-female-rats-with-irregular-estrus-cycles
#2
Yuji Tomori, Ken Takumi, Norio Iijima, Shinro Takai, Hitoshi Ozawa
Insufficiency of thyroid hormones inhibits gonadotropin release and results in dysregulation of reproductive function, although the precise mechanism of this disrupted gonadotropin secretion remains unclear. Kisspeptin is a neuropeptide that strongly stimulates gonadotropin secretion and plays an important role in reproductive function. To examine the involvement of kisspeptin in the dysregulation of gonadotropin secretion in hypothyroidism, we investigated Kiss1 mRNA expression and kisspeptin immunoreactivity in the hypothalamus of female rats treated with propylthiouracil (PTU)...
November 27, 2016: Neuroscience Research
https://www.readbyqxmd.com/read/27894163/feature-of-amenorrhea-in-postoperative-tamoxifen-users-with-breast-cancer
#3
Hoon Kim, Wonshik Han, Seung Yup Ku, Chang Suk Suh, Seok Hyun Kim, Young Min Choi
OBJECTIVE: Tamoxifen has been used to prevent the recurrence of breast cancer. However, tamoxifen-users frequently experience amenorrhea and it can be confused from that caused by other hormonal abnormalities. In amenorrheic patients without breast cancer, clinicians usually measure the sex hormone levels that are known to be associated with ovarian or menstrual function. This study aimed to investigate the feature of female sex hormones in premenopausal breast cancer patients undergoing tamoxifen treatment...
October 27, 2016: Journal of Gynecologic Oncology
https://www.readbyqxmd.com/read/27869718/endocrine-dysfunction-in-female-fmr1-premutation-carriers-characteristics-and-association-with-ill-health
#4
Sonya Campbell, Sarah E A Eley, Andrew G McKechanie, Andrew C Stanfield
Female FMR1 premutation carriers (PMC) have been suggested to be at greater risk of ill health, in particular endocrine dysfunction, compared to the general population. We set out to review the literature relating to endocrine dysfunction, including premature ovarian insufficiency (POI), in female PMCs, and then to consider whether endocrine dysfunction in itself may be predictive of other illnesses in female PMCs. A systematic review and pilot data from a semi-structured health questionnaire were used. Medline, Embase, and PsycInfo were searched for papers concerning PMCs and endocrine dysfunction...
November 18, 2016: Genes
https://www.readbyqxmd.com/read/27867175/understanding-the-scatter-radiation-distribution-during-c-arm-ct-examination-a-body-phantom-study
#5
Toshiyo Norimasa, Akihiko Kakimi, Yoshinori Takao, Shohei Sasaki, Yutaka Katayama, Daisuke Himoto, Shinichiro Izuta, Takao Ichida
The purpose of this study was to understand the scatter radiation distribution during C-arm CT examination in the interventional radiography (IVR) room to show the escaped area and the radiation protective method. The C-arm rotates 200° in 5 s. The tube voltage was 90 kV, and the entrance dose to the detector was 0.36 μGy/frame during C-arm CT examination. The scattered doses were measured each 50 cm from the isocenter like a grid pattern. The heights of the measurement were 50, 100, and 150 cm from the floor...
2016: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/27857512/respiratory-manifestations-in-endocrine-diseases
#6
REVIEW
Codruţa Lencu, Teodora Alexescu, Mirela Petrulea, Monica Lencu
The control mechanisms of respiration as a vital function are complex: voluntary - cortical, and involuntary - metabolic, neural, emotional and endocrine. Hormones and hypothalamic neuropeptides (that act as neurotrasmitters and neuromodulators in the central nervous system) play a role in the regulation of respiration and in bronchopulmonary morphology. This article presents respiratory manifestations in adult endocrine diseases that evolve with hormone deficit or hypersecretion. In hyperthyroidism, patients develop ventilation disorders, obstructive and central sleep apnea, and pleural collection...
2016: Clujul Medical (1957)
https://www.readbyqxmd.com/read/27852097/subclinical-hypothyroidism-and-intracytoplasmic-sperm-injection-outcomes
#7
Marcela de Alencar Coelho Neto, Wellington de Paula Martins, Anderson Sanches de Melo, Rui Alberto Ferriani, Paula Andrea Navarro
Purpose Whether preconception elevated concentrations of thyroid-stimulating hormone (TSH) compromises reproductive outcomes in patients undergoing assisted reproduction techniques (ARTs) remains unclear. This study therefore compared the reproductive outcomes in patients with TSH concentrations of < 2.5 mIU/L, 2.5-4.0 mIU/L, and 4.0-10.0 mIU/L undergoing controlled ovarian stimulation (COS) for in vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI). Methods This retrospective cohort study evaluated the medical records of all women with measured TSH concentrations who underwent IVF/ICSI between January 2011 and December 2012...
November 16, 2016: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/27803384/exposure-of-pregnant-mice-to-perfluorobutanesulfonate-causes-hypothyroxinemia-and-developmental-abnormalities-in-female-offspring
#8
Xuejiao Feng, Xinyuan Cao, Shasha Zhao, Xiaoli Wang, Xu Hua, Lin Chen, Ling Chen
Perfluorobutanesulfonate (PFBS) is widely used in many industrial products. We evaluated the influence of prenatal PFBS exposure on perinatal growth and development, pubertal onset, and reproductive and thyroid endocrine system in female mice. Here, we show that when PFBS (200 and 500 mg/kg/day) was orally administered to pregnant mice (PFBS-dams) on days 1-20 of gestation, their female offspring (PFBS-offspring) exhibited decreased perinatal body weight and delayed eye opening compared to control offspring...
November 1, 2016: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/27796689/an-assessment-of-exposure-and-effects-of-persistent-organic-pollutants-in-an-urban-cooper-s-hawk-accipiter-cooperii-population
#9
Jason M Brogan, David J Green, France Maisonneuve, John E Elliott
Among the stressors confronting urban wildlife, chemical contaminants pose a particular problem for high trophic feeding species. Previous data from fortuitous carcass collections revealed surprisingly high levels of persistent organic pollutants in raptor species, including the Cooper's hawk (Accipiter cooperii), from urbanized areas of southwestern British Columbia, Canada. Thus, in 2012 and 2013, we followed up on that finding by measuring POPs in blood samples from 21 adult and 15 nestling Cooper's hawks in Vancouver, a large urban area in southwestern Canada...
October 28, 2016: Ecotoxicology
https://www.readbyqxmd.com/read/27787904/an-evaluation-of-the-endocrine-disruptive-potential-of-crude-oil-water-accommodated-fractions-and-crude-oil-contaminated-surface-water-to-freshwater-organisms-using-in-vitro-and-in-vivo-approaches
#10
J Christoff Truter, Johannes H van Wyk, Paul J Oberholster, Anna-Maria Botha, Lucky M Mokwena
Knowledge regarding the potential impacts of crude oil on endocrine signalling in freshwater aquatic vertebrates is limited. In this study, the expression of selected genes as biomarkers for altered endocrine signalling were studied in African clawed frog, Xenopus laevis tadpoles, and juvenile Mozambique tilapia, Oreochromis mossambicus exposed to weathered bunker and un-weathered refinery crude oil water accommodated fractions (WAFs). In addition, the expression of the aforementioned genes was quantified in X...
October 27, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27750361/thyroid-autoimmunity-and-reproductive-function
#11
Natalie M Crawford, Anne Z Steiner
Thyroid hormones are important for normal reproductive function, and maternal thyroid dysfunction has been associated with infertility, miscarriage, preterm birth, and poor neurodevelopment in the offspring. Thyroid autoimmunity is the leading cause of thyroid dysfunction in women of reproductive age. Women with thyroid autoimmunity, even with normal thyroid function, appear to be at a higher risk for poor reproductive outcomes, including miscarriage and preterm birth. Thyroxine replacement in women with thyroid autoimmunity with or without appreciable thyroid dysfunction may improve pregnancy outcomes...
November 2016: Seminars in Reproductive Medicine
https://www.readbyqxmd.com/read/27741550/the-impact-and-management-of-subclinical-hypothyroidism-for-improving-reproductive-outcomes-such-as-fertility-and-miscarriage
#12
Aimee Seungdamrong
Subclinical hypothyroidism has been found to be associated with adverse reproductive outcomes, such as infertility, miscarriage, preterm birth, and complications of pregnancy. Multiple studies have investigated the relationships between thyroid function, thyroid antibodies, fertility, and pregnancy. Thyroid autoimmunity is the most common cause of hypothyroidism in iodine-sufficient locations. Thyroid antibodies have been associated with adverse reproductive outcomes such as miscarriage and infertility. Debate exists regarding the method of identification of thyroid dysfunction in pregnancy, which can be conducted by targeted screening or by universal screening...
November 2016: Seminars in Reproductive Medicine
https://www.readbyqxmd.com/read/27741548/thyroid-dysfunction-and-male-reproductive-physiology
#13
Neal Patel, James A Kashanian
Normal thyroid physiology is paramount for the proper development and important for the maintenance of male reproduction. Both short- and long-term deviations in thyroid hormone levels have been shown to alter male reproductive function on a micro- and macroscopic level. Thyrotoxicosis and hypothyroidism are associated with changes in spermatogenesis, semen quality, levels of sexual hormones, and erectile function. However, the degree to which thyroid dysfunction is clinically responsible for male infertility has not been clearly elucidated...
November 2016: Seminars in Reproductive Medicine
https://www.readbyqxmd.com/read/27733001/thyroid-in-reproduction
#14
Clarisa R Gracia
No abstract text is available yet for this article.
November 2016: Seminars in Reproductive Medicine
https://www.readbyqxmd.com/read/27697205/clinical-applications-of-gonadotropins-in-the-female-assisted-reproduction-and-beyond
#15
L Casarini, G Brigante, M Simoni, D Santi
Gonadotropins (LH, FSH, and hCG) act in concert in the regulation of female reproductive system. Exploiting this influence, they are part of the assisted reproductive technique protocols. In this review we analyze the effectiveness of the different available gonadotropin formulations and the consequent adverse events. Moreover, different protocols for poor-responders and polycystic ovary syndrome affected women are explored. All these clinical different approaches have specific molecular bases, covered in this review starting from evolution and population genetics, getting to in vitro studies of gonadotropins action...
2016: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/27697202/beyond-reproduction-pituitary-hormone-actions-on-bone
#16
T Yuen, L Sun, P Liu, H C Blair, M New, A Zallone, M Zaidi
The long-held belief that pituitary hormones act solely on master targets was first questioned when we documented G protein-coupled receptors for thyroid-stimulating hormone, follicle-stimulating hormone, adrenocorticotrophic hormone, oxytocin, and vasopressin on bone cells. These evolutionarily conserved hormones and their receptors are known to have primitive roles, and exist in invertebrate species as far down as coelenterates. It is not surprising therefore that each such hormone has multiple hitherto unrecognized functions in mammalian integrative physiology, and hence, becomes a potential target for therapeutic intervention...
2016: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/27672163/mechanisms-of-action-point-towards-combined-pbde-ndl-pcb-risk-assessment
#17
Milou M L Dingemans, Marjolijn Kock, Martin van den Berg
At present, human risk assessment of the structurally similar non-dioxin-like (NDL) PCBs and polybrominated diphenylethers (PBDEs) is done independently for both groups of compounds. There are however obvious similarities between NDL-PCBs and PBDEs with regard to modulation of the intracellular calcium homeostasis (basal calcium levels, voltage-gated calcium channels, calcium uptake, ryanodine receptor) and thyroid hormone (TH) homeostasis (TH levels and transport). which are mechanisms of action related to neurobehavioral effects (spontaneous activity, habituation and learning ability)...
October 2016: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/27652192/laying-performance-digestibility-and-plasma-hormones-in-laying-hens-exposed-to-chronic-heat-stress-as-affected-by-betaine-vitamin-c-and-or-vitamin-e-supplementation
#18
Youssef A Attia, Abd El-Hamid E Abd El-Hamid, Ahmed A Abedalla, Marfat A Berika, Mohammed A Al-Harthi, Osman Kucuk, Kazim Sahin, Baha M Abou-Shehema
Heat stress had a negative effect on laying hens' performance, thus this research was to study the influences of betaine (Bet, 1000 mg/kg betaine), vitamin C (VC, 200 mg/kg ascorbic acid), and vitamin E (VE, 150 mg/kg α-Tocopherol acetate) and their possible combinations on egg production, digestibility of nutrients, plasma hormones and reproductive organs of dual-purpose hens exposed to chronic heat stress. Two hundred and eighty eight hens and thirty-six cocks from 32 to 48 weeks of age were divided into nine treatment groups of four replicates, each containing eight hens and one cock...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27628237/female-infertility-and-serum-auto-antibodies-a-systematic-review
#19
Alban Deroux, Chantal Dumestre-Perard, Camille Dunand-Faure, Laurence Bouillet, Pascale Hoffmann
On average, 10 % of infertile couples have unexplained infertility. Auto-immune disease (systemic lupus erythematosus, anti-phospholipid syndrome) accounts for a part of these cases. In the last 20 years, aspecific auto-immunity, defined as positivity of auto-antibodies in blood sample without clinical or biological criteria for defined diseases, has been evoked in a subpopulation of infertile women. A systematic review was performed (PUBMED) using the MESH search terms "infertility" and "auto-immunity" or "reproductive technique" or "assisted reproduction" or "in vitro fertilization" and "auto-immunity...
September 14, 2016: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/27618833/follow-up-and-evaluation-of-the-pregnancy-outcome-in-women-of-reproductive-age-with-graves-disease-after-131iodine-treatment
#20
Li-Hua Zhang, Jing-Yan Li, Qi Tian, Shuang Liu, Hong Zhang, Sheng Liu, Jiu-Gen Liang, Xian-Ping Lu, Ning-Yi Jiang
The aims of the present study were to analyze the outcomes of pregnancy, after (131)I treatment, in patients of reproductive age with Graves' hyperthyroidism and to investigate the effects, if any, of the (131)I treatment on the mothers and newborns. From 2009 to 2014, 257 pregnant female patients with Graves' hyperthyroidism in the outpatients at the Department of Nuclear Medicine and 166 healthy pregnant women from the Department of Obstetrics at Sun Yat-Sen Memorial Hospital were included in our study. They were divided into a (131)I therapy group (n = 130) and an anti-thyroid drug (ATD) group (n = 127) according to their therapy before conception...
November 2016: Journal of Radiation Research
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