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Thyroid AND reproduction

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https://www.readbyqxmd.com/read/28039875/first-trimester-isolated-maternal-hypothyroxinemia-adverse-maternal-metabolic-profile-and-impact-on-the-obstetrical-outcome
#1
Raluca Maria Furnica, Damien Gruson, John H Lazarus, Dominique Maiter, Pierre Bernard, Chantal Daumerie
BACKGROUND: Isolated maternal hypothyroxinemia (IH) is defined as low maternal FT4 (<5(th) percentile) and normal TSH. There is concern on its potential negative effects on the mother and offspring. OBJECTIVE: We aimed to evaluate the prevalence of IH and to assess the consequences of hypothyroxinemia on the maternal and foetal outcomes. SUBJECTS AND METHODS: From a total of 1300 consecutive pregnant women recruited during the prenatal screen (mean gestational age, 11...
December 31, 2016: Clinical Endocrinology
https://www.readbyqxmd.com/read/28031728/the-frequency-of-polycystic-ovary-syndrome-in-young-reproductive-females-in-qatar
#2
Elham Sharif, Sumaya Rahman, Yumna Zia, Nasser M Rizk
This was a prospective cross-sectional study in which 126 female students between the ages of 18 and 30 years were evaluated for the frequency of polycystic ovary syndrome (PCOS) through clinical interview, questionnaire, and anthropometric measurements. The diagnostic criteria of the US National Institutes of Health criteria were used. Menstrual irregularities (MI) were identified, and clinical hyperandrogenism was evaluated by self-assessment of hirsutism using modified Ferriman-Gallwey score. Blood analysis was done for measurement of prolactin, thyroid-stimulating hormone, and the androgen hormones...
2017: International Journal of Women's Health
https://www.readbyqxmd.com/read/27995424/fragile-x-premutation-in-women-recognizing-the-health-challenges-beyond-primary-ovarian-insufficiency
#3
REVIEW
Luis R Hoyos, Mili Thakur
Fragile X premutation carriers have 55-200 CGG repeats in the 5' untranslated region of the FMR1 gene. Women with this premutation face many physical and emotional challenges in their life. Approximately 20% of these women will develop fragile X-associated primary ovarian insufficiency (FXPOI). In addition, they suffer from increased rates of menstrual dysfunction, diminished ovarian reserve, reduction in age of menopause, infertility, dizygotic twinning, and risk of having an offspring with a premutation or full mutation...
December 19, 2016: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/27940299/gper-erk-akt-nf-%C3%AE%C2%BAb-pathway-is-involved-in-cadmium-induced-proliferation-invasion-and-migration-of-gper-positive-thyroid-cancer-cells
#4
Ping Zhu, Ling-Yao Liao, Ting-Ting Zhao, Xiao-Mei Mo, George G Chen, Zhi-Min Liu
The higher incidence of thyroid cancer in women during reproductive years compared with men and the increased risk associated with the therapeutic use of estrogen have strongly suggested that estrogen may be involved in the occurrence and development of thyroid cancer. Cadmium (Cd) is a potent metalloestrogen that disrupts the endocrine system by mimicking the effects of 17β-estradiol (E2). In the present study, we demonstrate that similar to E2 and G1, a specific agonist for G protein-coupled estrogen receptor (GPER), Cd induces the proliferation, invasion and migration of human WRO and FRO thyroid cancer cells that have endogenous GPER...
December 9, 2016: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/27932249/toxicologic-effects-of-28-day-dietary-exposure-to-the-flame-retardant-1-2-dibromo-4-1-2-dibromoethyl-cyclohexane-tbech-in-f344-rats
#5
Ivan H A Curran, Virginia Liston, Andrée Nunnikhoven, Don Caldwell, Matthew J S Scuby, Peter Pantazopoulos, Dorothea F K Rawn, Laurie Coady, Cheryl Armstrong, David E Lefebvre, Genevieve S Bondy
The brominated flame retardant TBECH is used as an additive to delay ignition and inhibit fires in construction materials and consumer goods. Trends in human exposure are not clear, although humans may be exposed to TBECH via indoor dust and air. In birds and fish there is some evidence of disruption in endocrine and reproductive parameters due to TBECH. In vitro studies indicate that TBECH is an androgen receptor agonist. In this study rats were exposed to 0, 10, 50, 250, 1250 or 5000mg/kg technical TBECH for 28days in diet, corresponding to 0, 0...
December 5, 2016: Toxicology
https://www.readbyqxmd.com/read/27908417/biphasic-action-of-iodine-in-excess-at-different-doses-on-ovary-in-adult-rats
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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 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
#13
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 with 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
#14
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
#15
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 signaling in freshwater aquatic vertebrates is limited. The expression of selected genes as biomarkers for altered endocrine signaling was studied in African clawed frog, Xenopus laevis, tadpoles and juvenile Mozambique tilapia, Oreochromis mossambicus, exposed to weathered bunker and unweathered refinery crude oil water accommodated fractions (WAFs). In addition, the expression of the aforementioned genes was quantified in X. laevis tadpoles exposed to surface water collected from the proximity of an underground oil bunker...
October 27, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27750361/thyroid-autoimmunity-and-reproductive-function
#16
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
#17
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
#18
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
#19
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
#20
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
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