Increased serum reverse triiodothyronine in patients with hyperemesis gravidarum

1983 ◽  
Vol 102 (2) ◽  
pp. 284-287 ◽  
Author(s):  
N. Juras ◽  
K. Banovac ◽  
M. Sekso
Keyword(s):  
Thyroid Gland ◽  
Pregnant Women ◽  
Hyperemesis Gravidarum ◽  
Normal Function ◽  
Normal Serum ◽  
Control Group ◽  
Reverse Triiodothyronine ◽  
Pituitary Thyroid Axis ◽  
Thyroid Axis ◽  
Peripheral Conversion

Abstract. Thyroid function and pituitary responsiveness to TRH were studied in patients with hyperemesis gravidarum. Serum T3 and T4 concentrations were normal. Serum TBG levels in hyperemesis were normal for gestation, and the T4: TBG ratio was in the euthyroid range. In all patients a normal TSH response to TRH was found. Mean serum rT3 concentration was increased by 31% as compared to a control group of normal pregnant women (P< 0.001). The data suggest that in patients with hyperemesis gravidarum there is: (a) normal function of the thyroid gland and pituitary-thyroid axis, (b) an enhanced peripheral conversion of T4 to rT3.

scholarly journals OctylPhenol (OP) Alone and in Combination with NonylPhenol (NP) Alters the Structure and the Function of Thyroid Gland of the Lizard Podarcis siculus

2021 ◽  
Vol 80 (3) ◽  
pp. 567-578 ◽  
Author(s):  
Rosaria Sciarrillo ◽  
Mariana Di Lorenzo ◽  
Salvatore Valiante ◽  
Luigi Rosati ◽  
Maria De Falco
Keyword(s):  
Thyroid Gland ◽  
Endocrine Disrupting Chemicals ◽  
Thyroid Stimulating Hormone ◽  
Control Group ◽  
Type Ii ◽  
Endocrine Disrupting ◽  
Pituitary Thyroid Axis ◽  
Podarcis Siculus ◽  
Thyroid Axis ◽  
By Products

Abstract Different environmental contaminants disturb the thyroid system at many levels. AlkylPhenols (APs), by-products of microbial degradation of AlkylPhenol Polyethoxylates (APEOs), constitute an important class of Endocrine Disrupting Chemicals (EDCs), the two most often used environmental APs being 4-nonylphenol (4-NP) and 4-tert-octylphenol (4-t-OP). The purpose of the present study was to investigate the effects on the thyroid gland of the bioindicator Podarcis siculus of OP alone and in combination with NP. We used radioimmunoassay to determine their effects on plasma 3,3′,5-triiodo-L-thyronine (T3), 3,3′,5,5′-L-thyroxine (T4), thyroid-stimulating hormone (TSH), and thyrotropin-releasing hormone (TRH) levels in adult male lizards. We also investigated the impacts of AP treatments on hepatic 5′ORD (type II) deiodinase and hepatic content of T3 and T4. After OP and OP + NP administration, TRH levels increased, whereas TSH, T3, and T4 levels decreased. Lizards treated with OP and OP + NP had a higher concentration of T3 in the liver and 5′ORD (type II) activity, whereas T4 concentrations were lower than that observed in the control group. Moreover, histological examination showed that the volume of the thyroid follicles became smaller in treated lizards suggesting that that thyroid follicular epithelial cells were not functionally active following treatment. This data collectively suggest a severe interference with hypothalamus–pituitary–thyroid axis and a systemic imbalance of thyroid hormones. Graphic Abstract

scholarly journals The role of uterine artery Doppler index and nuchal translucency measurement in predicting perinatal problems and the gestational age in patients diagnosed with hyperemesis gravidarum

2020 ◽  
Vol 2 (3) ◽  
pp. 19-22
Author(s):  
Dilek Kartal ◽  
Azra Arıcı Yurtkul ◽  
Ayşe Rabia Şenkaya
Keyword(s):  
Pregnant Women ◽  
Uterine Artery ◽  
Hyperemesis Gravidarum ◽  
Systemic Disease ◽  
Nuchal Translucency ◽  
Control Group ◽  
Uterine Artery Doppler ◽  
Tertiary Center ◽  
Group 2 ◽  
Group 1

Objective: We aimed to investigate the effectiveness of uterine artery Doppler index and nuchal translucency (NT) measurement in determining perinatal problems in patients diagnosed with hyperemesis gravidarum (HEG). Material and methods: We included 80 pregnant women between the ages of 19–40 years with a singleton, noncomplicated pregnancy, no systemic disease, and no structural and chromosomal disorders in the fetus, who were admitted to our hospital which is a tertiary center with a large patient population in the region, between October 2015 and October 2016 in this study. Further, two group were formed as 40 pregnant women with the diagnosis of HEG (group 1) and 40 pregnant women for control group (group 2). Age, body mass index (BMI), educational status,pregnancy history (live birth, miscarriages), smoking, alcohol consumption, substance use, last menstrual period, serum pregnancy-associated plasma protein A (PAPP-A), free beta-human chorionic gonadotropin, (free ß-hCG), thyroid stimulating hormone (TSH), triiodothyronine (T3), thyroxine (T4) levels, nuchal translucency (NT), and uterine artery Doppler measurement values were recorded. The data between two groups were compared. Results: The education level of the group 1 was found higher (p = 0.001). The frequency of smoking in group 1 (n = 18; 45%) was found significantly higher than group 2 (n = 3; 7.5%) (p = 0.001). In group 1, uterine artery Doppler pulsatility index (PI) and resistance index (RI) values were found higher than group 2 (p = 0.026 and 0.024, respectively). Conclusion: The uterine artery Doppler PI, RI values measured at 20–24 weeks in patients with HEG were statistically significantly higher than those without HEG.

scholarly journals Alterations of the thyroid structure and function in experimental hypopinealism

2011 ◽  
Vol 57 (2) ◽  
pp. 32-35
Author(s):  
L A Bondarenko ◽  
L Iu Sergienko ◽  
N N Sotnik ◽  
A N Cherevko
Keyword(s):  
Thyroid Gland ◽  
Structural Changes ◽  
Structure And Function ◽  
Initial Increase ◽  
Histological Structure ◽  
Pituitary Thyroid Axis ◽  
Thyroid Axis ◽  
And Function ◽  
Sexually Mature

The pituitary-thyroid axis of young sexually mature rabbits kept under a 24-hour daylight photoperiod was shown to undergo phase-modulated variations of hormonal activity with its initial increase (during the first month) and subsequent progressive decrease (within 2-5 months after the onset of exposure to light). These changes correlated with the time-dependent fall in the blood T3, T4, and TSH levels. Simultaneously, the animals developed pathological changes in the histological structure of the thyroid gland similar to those in patients with secondary or tertiary hypothyroidism. It is concluded that hormonal and structural changes in the thyroid gland during long-term hypopinealism should be regarded as an experimental model of hypothyroidism of neuroendocrine origin.

scholarly journals Thyroid function in pregnant women with mild iodine deficiency

2003 ◽  
Vol 49 (6) ◽  
pp. 23-28 ◽  
Author(s):  
V. V. Fadeev ◽  
S. V. Lesnikova ◽  
G. A. Melnichenko
Keyword(s):  
Thyroid Gland ◽  
Pregnant Women ◽  
Thyroid Function ◽  
Potassium Iodide ◽  
Iodine Deficiency ◽  
Time Course ◽  
Therapy Group ◽  
Preventive Therapy ◽  
Control Group ◽  
Additional Risk

The study whose purpose was to examine the time course of changes in the function of thyroid gland (TG) in pregnant women with mild iodine deficiency enrolled 218 females in different periods of pregnancy in accordance with the following criteria: the absence of dysfunction (of TG). In 128 patients of them, baseline TG pathology was absent; 90 patients were found to have these or those types of euthyroid goiter. Some women received iodine preventive therapy (150-200 mcg of potassium iodide daily) on an individual basis. Comparison of the levels of TTH and T4 in women receiving and no receiving iodine preventive therapy revealed that by the end of pregnancy, those receiving 150-200 pg of potassium iodide had significantly lower TTN levels and higher T4 levels. Comparing the time course of changes in the volume of TG between these groups showed that they did not increase to a significantly greater extent in the females receiving no iodine preventive therapy. Whether potassium iodide was used, there were no changes in the size of TG nodal masses during pregnancy. In the control group, active smokers were fewer than those in the goiter group (p = 0.035). Six-ten months after labor, the volume of TG further increased in the females without iodine preventive therapy group while that substantially decreased in those receiving 150-200 pg of iodine daily. It is concluded that pregnancy in the presence of mild iodine deficiency is accompanied by a higher risk of the development and progression of goiter, and by a risk for gestational hypothyroxinemia, which is prevented by an individual iodine preventive therapy with 150-200 pg of potassium iodide daily. Furthermore, pregnancy is not accompanied by a risk of increases in the size of nodal euthyroid colloid goiter that does not itself entail an additional risk for gestational hypothyroxinemia.

scholarly journals Prevalence of iodine deficiency and goitre during pregnancy in east Hungary

2000 ◽  
pp. 479-483 ◽  
Author(s):  
E Mezosi ◽  
I Molnar ◽  
A Jakab ◽  
E Balogh ◽  
Z Karanyi ◽  
...  
Keyword(s):  
Thyroid Gland ◽  
Nutritional Status ◽  
Pregnant Women ◽  
Iodine Deficiency ◽  
Urinary Iodine ◽  
Thyroid Volume ◽  
Control Group ◽  
Thyroid Function Tests ◽  
Cross Sectional ◽  
Nodular Goitre

OBJECTIVE: To assess the iodine nutritional status and the prevalence of goitre during pregnancy in a region of Hungary that appeared to be iodine sufficient in previous studies. DESIGN: A cross-sectional voluntary screening study was organized in which 313 pregnant women participated. METHODS: Urine iodine concentration and the volume of the thyroid gland were measured in every woman. In the presence of low urinary iodine concentrations, goitre, or both, thyroid function tests were performed. RESULTS: Iodine deficiency was found in 57.1% of the pregnant women, and was severe in 15.6%. The volume of the thyroid gland was enlarged in 19.2% of individuals. Nodular goitre was found in 17 women (5.4%). The frequency of goitre and the mean thyroid volume were increased in the group of iodine-deficient women. In the 89 cases of iodine deficiency or goitre, thyrotrophin concentrations were in the normal range; however, the free triiodothyronine:free throxine ratio was increased in 97% of them, indicating that the thyroid gland was in a stimulated state in these individuals. CONCLUSIONS: Iodine deficiency with high prevalence of goitre was recognized among pregnant women in an area that previously appeared to be iodine sufficient. An unexpected mild iodine deficiency was also noted in the non-pregnant control group. Reassessment and continuous monitoring of iodine nutritional status is warranted even in populations that are apparently considered to be 'at no risk' of iodine deficiency, especially in pregnant women. Regular administration of iodine, starting at preconception or in early pregnancy and continuing during the period of nursing, is recommended in these regions.

The pituitary-thyroid axis in severe falciparum malaria: evidence for depressed thyrotroph and thyroid gland function

1990 ◽  
Vol 84 (3) ◽  
pp. 330-335 ◽  
Author(s):  
Timothy M.E. Davis ◽  
Wichai Supanaranond ◽  
Sasithon Pukrittayakamee ◽  
Sanjeev Krishna ◽  
Gillian R. Hart ◽  
...  
Keyword(s):  
Thyroid Gland ◽  
Falciparum Malaria ◽  
Thyroid Gland Function ◽  
Pituitary Thyroid Axis ◽  
Thyroid Axis ◽  
Gland Function ◽  
Severe Falciparum Malaria

RADIOIMMUNOASSAY OF 3,3′,5′-TRIIODOTHYRONINE (REVERSE T3) ON SMALL REUSABLE SEPHADEX COLUMNS

1978 ◽  
Vol 87 (2) ◽  
pp. 313-319 ◽  
Author(s):  
Jens Faber ◽  
Thorkild Friis ◽  
Carsten Kirkegaard ◽  
Kaj Siersbæk-Nielsen
Keyword(s):  
Detection Limit ◽  
Coefficient Of Variation ◽  
Normal Serum ◽  
Control Group ◽  
Reverse T3 ◽  
Reverse Triiodothyronine ◽  
The Mean

ABSTRACT A simple radioimmunoassay for serum reverse triiodothyronine on small reusable Sephadex G 25 fine columns has been developed. The assay was unaffected by serum volumes of up to 100 μl. The recovery of reverse T3 added to serum was in the mean 98.3 ± sem 3.2 % and the coefficient of variation within and between assay determinations 5.4 % and 7.5 %, respectively. The detection limit was 2.2 pg reverse T3/column. Serum reverse T3 in 58 euthyroid controls was in mean 48 ± sd 9 ng/100 ml, and was positively correlated to age (P < 0.001). No overlap was found between the control group, and the hypo- and hyperthyroid group respectively. Three patients with T3-toxicosis had a normal serum rT3.

Somatostatin immunoneutralization stimulates thyroid function in fowl

1986 ◽  
Vol 110 (1) ◽  
pp. 127-132 ◽  
Author(s):  
S.-K. Lam ◽  
S. Harvey ◽  
T. R. Hall ◽  
G. S. G. Spencer
Keyword(s):  
Thyroid Gland ◽  
Thyroid Function ◽  
Inhibitory Control ◽  
Domestic Fowl ◽  
Pituitary Thyroid Axis ◽  
Thyroid Axis

ABSTRACT The influence of somatostatin on thyroid function has been examined in immature domestic fowl passively immunized with somatostatin antiserum. Plasma thyroxine (T4) and tri-iodothyronine (T3) concentrations were markedly increased within 10 min of antisomatostatin administration and remained raised for at least 5 h. The increases in the T3 and T4 concentrations following somatostatin immunoneutralization were directly related to the volume of antisera administered. The increase in the T3 concentration exceeded the increase in the T4 concentration, resulting in a T3: T4 ratio greater than unity. While the raised T4 concentration began to decline 30 min after antisomatostatin administration, raised T3 concentrations were sustained for at least 2 h, and further increased the plasma T3: T4 ratio. These results demonstrate that somatostatin immunoneutralization stimulates thyroid function in fowl. The magnitude and rapidity of the thyroidal responses to somatostatin immunoneutralization suggests that they occur independently of the hypothalamic-pituitary-thyroid axis. Somatostatin appears to exert a tonic inhibitory control on avian thyroid function, possibly by effects mediated at the thyroid gland to inhibit T4 release and by peripheral effects to suppress the conversion of T4 and T3. J. Endocr. (1986) 110, 127–132

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