Searched for: subject:"Thyroxine"
(1 - 19 of 19)
document
Stroek, K. (author), Heijboer, A.C. (author), van Veen-Sijne, M. (author), Bosch, A.M. (author), Ploeg C.P.B. van der, (author), Zwaveling-Soonawala, N. (author), de Jonge, R. (author), van Trotsenburg, A.S.P. (author), Boelen, A. (author)
Introduction: Newborn screening (NBS) for congenital hypothyroidism (CH) in the Netherlands consists of thyroxine (T4), thyroid-stimulating hormone (TSH), and T4-binding globulin (TBG) measurements to detect thyroidal CH and central CH (CH-C). CH-C is detected by T4 or a calculated T4/TBG ratio, which serves as an indirect measure of free T4....
article 2021
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Zwaveling-Soonawala, N. (author), Trotsenburg, A.S. (author), Verkerk, P.H. (author)
Context. In central hypothyroidism (CeH) free thyroxine (FT4) concentrations are low while TSH concentrations may be low, normal or even slightly elevated due to reduced bioactivity. Congenital CeH (CCeH) may be isolated or part of multiple pituitary hormone deficiency (MPHD). Objective. To test our hypotheses that (1) TSH concentrations have a...
article 2018
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Zwaveling-Soonawala, N. (author), Trotsenburg, A.S. (author), Verkerk, P.H. (author)
Congenital hypothyroidism (CH) may be of thyroidal (CHT) or central origin (CHC). Worldwide, most neonatal screening programs are TSH based and effectively detect CHT. Only a few screening programs measure total or free T4 and TSH simultaneously or stepwise, enabling detection of CHT as well as CHC. A frequently used argument against screening...
article 2015
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Boelen, A. (author), van Veen, M. (author), Verkerk, P.H. (author), Diependaal, G. (author), Loeber, G. (author), Elvers, B. (author), Endert, E. (author)
The Dutch neonatal screening scheme for Congenital Hypothyroidism (CH) is primarily based on the determination of thyroxine (T4) in filter paper blood spots. In the lowest 5% of T4 values, thyroxine binding globulin (TBG) is measured in order to be able to correct for occasional low TBG levels. However, because the commercial TBG kit has been...
article 2013
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van den Hoek, A.M. (author), van Heijningen, C. (author), van der Schröder - Elst, J.P. (author), Ouwens, D.M. (author), Havekes, L.M. (author), Romijn, J.A. (author), Kalsbeek, A. (author), Pijl, H. (author), TNO Kwaliteit van Leven (author)
OBJECTIVE-We recently showed that intracerebroventricular infusion of neuropeptide Y (NPY) hampers inhibition of endogenous glucose production (EGP) by insulin in mice. The down stream mechanisms responsible for these effects of NPY remain to be elucidated. Therefore, the aim of this study was to establish whether intracerebroventricular NPY...
article 2008
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TNO Kwaliteit van Leven (author), Kempers, M.J.E. (author), van der Sluijs Veer, L. (author), Nijhuis-van der Sanden, R.W.G. (author), Lanting, C.I. (author), Kooistra, L. (author), Wiedijk, B.M. (author), Last, B.F. (author), de Vijlder, J.J.M. (author), Grootenhuis, M.A. (author), Vulsma, T. (author)
Context: Patients with thyroidal congenital hypothyroidism (CH-T) born in The Netherlands in 1981-1982 showed persistent intellectual and motor deficits during childhood and adulthood, despite initiation of T4 supplementation at a median age of 28 d after birth. Objective: The present study examined whether advancement of treatment initiation to...
article 2007
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TNO Kwaliteit van Leven (author), Kempers, M.J.E. (author), Lanting, C.I. (author), van Heijst, A.F.J. (author), van Trotsenburg, A.S.P. (author), Wiedijk, B.M. (author), de Vijlder, J.J.M. (author), Vulsma, T. (author)
Context: The Dutch T4-TSH-TBG-based neonatal screening program detects patients with congenital hypothyroidism (CH) of thyroidal (CH-T) as well as central (CH-C) origin. The numbers and characteristics of true-positive and false-positive referrals will differ from other, predominantly TSH-based, screening methods. Objective: The present study...
article 2006
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Lanting, C.I. (author), van Tijn, D.A. (author), Loeber, J.G. (author), Vulsma, T. (author), de Vijlder, J.J.M. (author), Verkerk, P.H. (author), TNO Preventie en Gezondheid (author)
Context. Since the introduction of screening for congenital hypothyroidism (CH) in 1974, the optimal laboratory strategy has been the subject of debate. Objective. To assess the clinical effectiveness and cost-effectiveness of various types of thyroxine (T4)-based strategies to screen for CH. Design, Setting, and Participants. In the Netherlands...
article 2005
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van Tijn, D.A. (author), de Vijlder, J.J.M. (author), Verbeeten Jr., B. (author), Verkerk, P.H. (author), Vulsma, T. (author), TNO Preventie en Gezondheid (author)
Due to the high frequency of concurrent pituitary hormone deficiencies, congenital hypothyroidism (CH) of central origin (CH-C) is a life-threatening disorder. Yet only a minority of these patients are detected by neonatal CH screening programs worldwide. We conducted a prospective multicenter study involving a 2-yr cohort of neonatally...
article 2005
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Gerrits, W.J.J. (author), Decuypere, E. (author), Verstegen, M.W.A. (author), Karabinas, V. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
We conducted two experiments with preruminant calves weighing 80 to 240 kg to study the long-term nutritional regulation of circulating IGF-I, thyroxine (T4), and triiodothyronine (T3). The two experiments were similar in design but were performed with calves of two live weight ranges: 80 to 160 kg (Exp. 1) and 160 to 240 kg (Exp. 2). In each...
article 1998
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den Ouden, A.L. (author), Kok, J.H. (author), Verkerk, P.H. (author), Brand, R. (author), Verloove-Vanhorick, S.P. (author), TNO Preventie en Gezondheid (author)
Transient neonatal hypothyroxinemia is very common in preterm infants. The literature on the effect of this hypothyroxinemia is, however, controversial, and large or long-term follow-up studies are not available. In a nationwide prospective follow-up study on very preterm and (or) very low birth weight infants (n = 717), we studied the...
article 1996
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Velthuis-te Wierik, E.J.M. (author), Westerterp, K.R. (author), van den Berg, H. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
Objective: Since little information is available on the capacity of the non-obese to adapt to a moderate decrease in energy intake, the effect of a 10-week moderately energy-restricted diet (ER) on energy expenditure and body composition was studied. Design: A controlled intervention study. After a weight-maintaining run-in period of 2 weeks,...
article 1995
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van Raaij, J.A.G.M. (author), Frijters, C.M.G. (author), Wong Yen Kong, L. (author), van den Berg, K.J. (author), Notten, W.R.F. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
In the present study the effects of hexachlorobenzene (HCB) and the metabolite pentachlorophenol (PCP) were investigated with respect to uptake of thyroxine (T4) into cerebrospinal fluid (CSF) and brain structures of rats. [125I]T4 was taken up into CSF of control rats by a relatively slow process, reaching a steady state after about 3 h. Both...
article 1994
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van Raaij, J.A.G.M. (author), Kaptein, E. (author), Visser, T.J. (author), van den Berg, K.J. (author), Medisch Biologisch Laboratorium TNO (author)
Metabolism of thyroid hormones was investigated in WAG/MBL rats that had been exposed to hexachlorobenzene (HCB). Serum thyroxine (T4) levels were lowered by 35.5%, whereas triiodothyronine (T3) levels were not changed. Bile flow, as well as T4 excretion in bile were increased by HCB treatment. Analysis of bile by HPLC revealed a more than 3...
article 1993
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Padró, T. (author), van den Hoogen, C.M. (author), Emeis, J.J. (author), Instituut voor verouderings- en vaatziekten onderzoek TNO (author)
The aim of the present study was to investigate whether hypothyroidism would affect the components of the rat plasma fibrinolytic system. Hypothyroidism was induced by feeding rats a thiouracil-containing diet for 2 weeks. During this period, half of the animals received subcutaneous injections of L-thyroxine (20 μg/kg daily) to restore thyroid...
article 1993
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Qvigstad, E. (author), Verloove-Vanhorick, S.P. (author), Ens-Dokkum, M.H. (author), Schreuder, A.M. (author), Veen, S. (author), Brand, R. (author), Oostdijk, W. (author), Ruys, J.H. (author), Nederlands Instituut voor Praeventieve Gezondheidszorg TNO (author)
To predict height at five years in a cohort of 565 very preterm and/or very low-birth-weight children, hypothesized growth determinants were subjected to discriminant analysis. Many neonatal parameters were not significantly associated with short stature at five years of age. A correct classification of stature (smaller/larger than the 10th...
article 1993
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Meijer, W.J. (author), Verloove-Vanhorick, S.P. (author), Brand, R. (author), van den Brande, J.L. (author), TNO Preventie en Gezondheid (author)
In 563 surviving very preterm (<32 weeks gestational age) and/or very low birthweight (<1500 g) infants the relationship between neonatal thyroxine concentration and psychomotor development at 2 years of age (corrected for preterm birth) was studied. A significant association was found between low neonatal thyroxine concentration and a negative...
article 1992
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van Raaij, J.A.G.M. (author), van den Berg, K.J. (author), Notten, W.R.F. (author), Medisch Biologisch Laboratorium TNO (author)
Previous results have indicated that hexachlorobenzene (HCB)-induced hypothyroidism may be caused by its main metabolite pentachlorophenol (PCP), and by tetrachlorohydroquinone (TCHQ), rather than by the parent compound. In the present experiments it was investigated whether hormone displacement from serum carriers could be a factor in the...
article 1991
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van den Berg, K.J. (author), van Raaij, J.A.G.M. (author), Bragt, P.C. (author), Notten, W.R.F. (author), Medisch Biologisch Laboratorium TNO (author)
Previous results in experimental systems have suggested that hydroxylated PCBs may decrease thyroid hormone levels through associative interaction with transthyretin. In the present paper it was investigated whether this property was also shared by various industrial chemicals, mainly pesticides. In total, 65 compounds from 12 chemical groups...
article 1991
Searched for: subject:"Thyroxine"
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