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2.
Placenta ; 136: 29-34, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-37028222

RESUMO

INTRODUCTION: Obstetric antiphospholipid syndrome (OAPS) is an autoimmune disease related to antiphospholipid antibodies (aPL) with primaryinflammatory injury followed by clot cascade activation and thrombus formation. Complement system activation and their participation in aPL-related thrombosis is unclosed. METHODS: We haveanalysed adverse pregnancy outcomes (APO) related to low complement (LC) levels in a cohort of 1048 women fulfilling classification criteria for OAPS. RESULTS: Overall, 223 (21.3%) women presented LC values, during pregnancy. The length of pregnancy was shorter in OAPS women with LC compared to those with normal complement (NC) (median: 33 weeks, interquartile range: [24-38] vs. 35 weeks [27-38]; p = 0.022). Life new-born incidence was higher in patients with NC levels than in those with LC levels (74.4% vs. 67.7%; p = 0.045). Foetal losses were more related to women with triple or double aPL positivity carrying LC than NC values (16.3% vs. 8.0% NC; p = 0.027). Finally, some placental vasculopathies were affected in OAPS patients with LC as late Foetal Growth Restriction (FGR >34 weeks) rise to 7.2% in women with LC vs. 3.2% with NC (p = 0.007). DISCUSSION: Data from our registry indicate that incidence of APO was higher in OAPS women with LC levels and some could be reverted by the correct treatment.


Assuntos
Síndrome Antifosfolipídica , Complicações na Gravidez , Feminino , Gravidez , Humanos , Masculino , Síndrome Antifosfolipídica/complicações , Síndrome Antifosfolipídica/epidemiologia , Placenta , Anticorpos Antifosfolipídeos , Sistema de Registros
3.
J Matern Fetal Neonatal Med ; 36(1): 2183748, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36860098

RESUMO

PURPOSE: To evaluate the risk of recurrence of severe placenta-mediated pregnancy complications and compare the efficacy of two different anti-thrombotic regimens in women with a history of late fetal loss without thrombophilia. PATIENTS AND METHODS: We performed a 10-year retrospective observational study (2008-2018) analyzing a cohort of 128 women who suffered from pregnancy fetal loss (>20 weeks of gestational age) with histological evidence of placental infarction. All the women tested negative for congenital and/or acquired thrombophilia. In their subsequent pregnancies, 55 received prophylaxis with acetylsalicylic acid (ASA) only and 73 received ASA plus low molecular weight heparin (LMWH). RESULTS: Overall, one-third of all pregnancies (31%) had adverse outcomes related to placental dysfunction: pre-term births (25% <37 weeks, 5.6% <34 weeks), newborns with birth weight <2500 g (17%), and newborns small for gestational age (5%). The prevalence of placental abruption, early and/or severe preeclampsia, and fetal loss >20 weeks were 6%, 5%, and 4% respectively. We found a risk reduction for combination therapy (ASA plus LMWH) compared with ASA alone for delivery <34 weeks (RR 0.11, 95% CI: 0.01-0.95 p = 0.045) and a trend for the prevention of early/severe preeclampsia (RR 0.14, 95% CI: 0.01-1.18, p = 0.0715), while no statistically significant difference was observed for composite outcomes (RR 0.51, 95%CI: 0.22-1.19, p = 0.1242). An absolute risk reduction of 5.31% was observed for the ASA plus LMWH group. Multivariate analysis confirmed a risk reduction for delivery <34 weeks (RR 0.32, 95% CI 0.16-0.96 p = 0.041). CONCLUSION: In our study population, the risk of recurrence of placenta-mediated pregnancy complications is substantial, even in the absence of maternal thrombophilic conditions. A reduction of the risk of delivery <34 weeks was detected in the ASA plus LMWH group.


Assuntos
Aborto Espontâneo , Doenças Placentárias , Pré-Eclâmpsia , Trombofilia , Recém-Nascido , Gravidez , Feminino , Humanos , Placenta , Estudos Retrospectivos , Heparina de Baixo Peso Molecular , Aspirina , Infarto
5.
Rheumatology (Oxford) ; 59(6): 1306-1314, 2020 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-31580459

RESUMO

OBJECTIVES: To compare clinical features, laboratory data and fetal-maternal outcomes between 1000 women with obstetric APS (OAPS) and 640 with aPL-related obstetric complications not fulfilling Sydney criteria (non-criteria OAPS, NC-OAPS). METHODS: This was a retrospective and prospective multicentre study from the European Registry on Obstetric Antiphospholipid Syndrome. RESULTS: A total of 1650 women with 5251 episodes, 3601 of which were historical and 1650 latest episodes, were included. Altogether, 1000 cases (OAPS group) fulfilled the Sydney classification criteria and 650 (NC-OAPS group) did not. Ten NC-OAPS cases were excluded for presenting thrombosis during follow-up. All cases were classified as category I (triple positivity or double positivity for aPL) or category II (simple positivity). Overall, aPL laboratory categories showed significant differences: 29.20% in OAPS vs 17.96% in NC-OAPS (P < 0.0001) for category I, and 70.8% in OAPS vs 82% in NC-OAPS (P < 0.0001) for category II. Significant differences were observed when current obstetric complications were compared (P < 0.001). However, major differences between groups were not observed in treatment rates, livebirths and thrombotic complications. In the NC-OAPS group, 176/640 (27.5%) did not fulfil Sydney clinical criteria (subgroup A), 175/640 (27.34%) had a low titre and/or non-persistent aPL positivity but did meet the clinical criteria (subgroup B) and 289/640 (45.15%) had a high aPL titre but did not fulfil Sydney clinical criteria (subgroup C). CONCLUSION: Significant clinical and laboratory differences were found between groups. Fetal-maternal outcomes were similar in both groups when treated. These results suggest that we could improve our clinical practice with better understanding of NC-OAPS patients.


Assuntos
Síndrome Antifosfolipídica/diagnóstico , Aspirina/uso terapêutico , Complicações na Gravidez/diagnóstico , Adulto , Anticorpos Antifosfolipídeos , Síndrome Antifosfolipídica/tratamento farmacológico , Feminino , Humanos , Nascido Vivo , Gravidez , Complicações na Gravidez/tratamento farmacológico , Resultado da Gravidez , Estudos Prospectivos , Sistema de Registros , Estudos Retrospectivos , Resultado do Tratamento
6.
BMC Infect Dis ; 19(1): 952, 2019 Nov 08.
Artigo em Inglês | MEDLINE | ID: mdl-31703612

RESUMO

BACKGROUND: Osteomyelitis of the pubic symphysis is a rare cause of pelvic pain after delivery, mainly caused by Staphylococcus aureus and Pseudomonas aeruginosa. The clinical context is the same as the more common diastasis of the pubic bone, but the presence of intense local pain in association with fever should prompt further clinical work-up based on blood chemistry, microbiology and diagnostic imaging. We report the first case of methicillin-resistant Staphylococcus aureus osteomyelitis of the pubic symphysis occuring after the delivery. CASE PRESENTATION: A 39-year-old woman developed pain over the pubic bone 12 h after the delivery. After 72 h fever rose and laboratory examination showed elevation of C-reactive protein and procalcitonin levels. Pelvic x-rays and magnetic resonance showed pubic diastasis, joint effusion, tiny irregularities of articular surfaces and, severe bone edema. The patient was started on broad spectrum intravenous (IV) antibiotics (piperacillin-tazobactam) and then replaced to IV vancomycin and oral levofloxacin based on antibiogram result. She was then discharged with oral antibiotic therapy and fully recovered. CONCLUSIONS: Due to the rarity of this disease, we compared our experience with the other cases of osteomyelitis of pubic symphysis occurring in peri-postpartum reported in the literature. The course of osteomyelitis was favourable in all patients, and only in one case an additional orthopedic procedure for symphysis fixation was necessary. Knowledge of this rare condition is important to enable prompt diagnosis and treatment.


Assuntos
Parto Obstétrico , Staphylococcus aureus Resistente à Meticilina/isolamento & purificação , Osteomielite/microbiologia , Sínfise Pubiana/patologia , Infecções Estafilocócicas/microbiologia , Adulto , Antibacterianos/uso terapêutico , Feminino , Febre/tratamento farmacológico , Humanos , Levofloxacino/uso terapêutico , Imageamento por Ressonância Magnética , Testes de Sensibilidade Microbiana , Osteomielite/diagnóstico por imagem , Osteomielite/tratamento farmacológico , Período Pós-Parto , Gravidez , Pseudomonas aeruginosa/isolamento & purificação , Sínfise Pubiana/diagnóstico por imagem , Doenças Raras/diagnóstico por imagem , Doenças Raras/tratamento farmacológico , Doenças Raras/microbiologia , Infecções Estafilocócicas/tratamento farmacológico , Resultado do Tratamento , Vancomicina/uso terapêutico
7.
Thromb Haemost ; 118(4): 639-646, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29490410

RESUMO

The effect of additional treatments combined with conventional therapy on pregnancy outcomes was examined in high-risk primary antiphospholipid syndrome (PAPS) patients to identify the most effective treatment strategy. The study's inclusion criteria were (1) positivity to lupus anticoagulant alone or associated with anticardiolipin and/or anti-ß2 glycoprotein I antibodies; (2) a history of severe maternal-foetal complications (Group I) or a history of one or more pregnancies refractory to conventional therapy leading to unexplained foetal deaths not associated with severe maternal-foetal complications (Group II). Two different additional treatments were considered: oral-low-dose steroids (10-20 mg prednisone daily) and/or 200 to 400 mg daily doses of hydroxychloroquine and parenteral-intravenous immunoglobulins at 2 g/kg per month and/or plasma exchange. The study's primary outcomes were live birth rates and pregnancy complications. A total of 194 pregnant PAPS patients attending 20 tertiary centres were retrospectively enrolled. Hydroxychloroquine was found to be linked to a significantly higher live birth rate with respect to the other oral treatments in the Group II patients. The high (400 mg) versus low (200 mg) doses of hydroxychloroquine (p = 0.036) and its administration before versus during pregnancy (p = 0.021) were associated with a significantly higher live birth rate. Hydroxychloroquine therapy appeared particularly efficacious in the PAPS patients without previous thrombosis. Parenteral treatments were associated with a significantly higher live birth rate with respect to the oral ones (p = 0.037), particularly in the Group I patients. In conclusion, some additional treatments were found to be safe and efficacious in high-risk PAPS pregnant women.


Assuntos
Síndrome Antifosfolipídica/terapia , Inibidor de Coagulação do Lúpus/sangue , Administração Oral , Adulto , Anticorpos Anticardiolipina/sangue , Anticorpos Antifosfolipídeos/sangue , Coeficiente de Natalidade , Terapia Combinada , Feminino , Humanos , Hidroxicloroquina/uso terapêutico , Imunoglobulinas Intravenosas/uso terapêutico , Nascido Vivo , Troca Plasmática , Gravidez , Complicações na Gravidez/tratamento farmacológico , Resultado da Gravidez , Estudos Retrospectivos , Risco , Esteroides/administração & dosagem , Esteroides/uso terapêutico , Trombose/tratamento farmacológico
8.
Autoimmun Rev ; 16(7): 730-734, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28478081

RESUMO

AIM: To describe the consecutive pregnancy outcome and treatment in refractory obstetrical antiphospholipid syndrome (APS). METHODS: Retrospective multicenter open-labelled study from December 2015 to June 2016. We analyzed the outcome of pregnancies in patients with obstetrical APS (Sydney criteria) and previous adverse obstetrical event despite low-dose aspirin and low-molecular weight heparin LMWH (LMWH) conventional treatment who experienced at least one subsequent pregnancy. RESULTS: Forty nine patients with median age 27years (23-32) were included from 8 European centers. Obstetrical APS was present in 71%, while 26% had obstetrical and thrombotic APS. Lupus anticoagulant was present in 76% and triple antiphospholipid antibody (APL) positivity in 45% of patients. Pregnancy loss was noted in 71% with a median age of gestation of 11 (8-21) weeks. The presence of APS non-criteria features (35% vs 17% in pregnancies without adverse obstetrical event; p=0.09), previous intrauterine death (65% vs 38%; p=0.06), of LA (90% vs 65%; p=0.05) were more frequent in pregnancies with adverse pregnancy outcome, whereas isolated recurrent miscarriage profile was more frequent in pregnancies without any adverse pregnancy outcome (15% vs 41%; p=0.04). In univariate analysis considering all pregnancies (index and subsequent ones), an history of previous intrauterine death was associated with pregnancy loss (odds-ratio 2.51 (95% CI 1.274.96); p=0.008), whereas previous history of prematurity related to APS (odds-ratio 0.13 95%CI 0.04 0.41, P=0.006), steroids use during the pregnancy (odds-ratio 0.30 95% CI 0.11-0.82, p=0.019) and anticardiolipids isolated profile (odds-ratio 0.51 95% CI 0.26-1.03, p=0.0588) were associated with favorable outcome. In multivariate analysis, only previous history of prematurity, steroids use and anticardiolipids isolated profiles were associated with live-birth pregnancy. CONCLUSION: The main features of refractory obstetrical APS were the high rates of LA and triple APL positivity. Steroids could be effective in this APS profile, but prospective studies are necessary.


Assuntos
Anticoagulantes/uso terapêutico , Síndrome Antifosfolipídica/tratamento farmacológico , Aspirina/uso terapêutico , Heparina de Baixo Peso Molecular/uso terapêutico , Anticorpos Antifosfolipídeos/imunologia , Síndrome Antifosfolipídica/imunologia , Feminino , Humanos , Inibidor de Coagulação do Lúpus/imunologia , Gravidez , Resultado da Gravidez , Estudos Retrospectivos , Resultado do Tratamento
9.
J Clin Endocrinol Metab ; 99(11): 4291-8, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25057878

RESUMO

OBJECTIVE: Thyroid dysfunction is associated with impaired cognitive development. Perchlorate decreases thyroidal iodine uptake, potentially reducing thyroid hormone production. It is unclear whether perchlorate exposure in early life affects neurodevelopment. DESIGN: Historical cohort analysis. PATIENTS: From 2002 to 2006, 21,846 women at gestational age <16 weeks recruited from antenatal clinics in Cardiff, UK and Turin, Italy were enrolled in the Controlled Antenatal Thyroid Screening Study (CATS). We undertook a retrospective analysis of 487 mother-child pairs in mothers who were hypothyroid/hypothyroxinemic during pregnancy and analyzed whether first trimester maternal perchlorate levels in the highest 10% of the study population were associated with increased odds of offspring IQ being in the lowest 10% at 3 years of age. MAIN OUTCOME MEASURES: Maternal urinary perchlorate, offspring IQ. RESULTS: Urine perchlorate was detectable in all women (median 2.58 µg/L); iodine levels were low (median 72 µg/L). Maternal perchlorate levels in the highest 10% of the population increased the odds of offspring IQ being in the lowest 10% OR = 3.14 (95% CI 1.38, 7.13) P = .006 with a greater negative impact observed on verbal OR = 3.14 (95% CI 1.42, 6.90) P = .005 than performance IQ. Maternal levothyroxine therapy did not reduce the negative impact of perchlorate on offspring IQ. CONCLUSIONS: This is the first study using individual-level patient data to study maternal perchlorate exposure and offspring neurodevelopment and suggests that high-end maternal perchlorate levels in hypothyroid/hypothyroxinemic pregnant women have an adverse effect on offspring cognitive development, not affected by maternal levothyroxine therapy. These results require replication in additional studies, including in the euthyroid population.


Assuntos
Hipotireoidismo/urina , Inteligência , Percloratos/urina , Complicações na Gravidez/urina , Efeitos Tardios da Exposição Pré-Natal/psicologia , Glândula Tireoide/fisiopatologia , Pré-Escolar , Cognição , Feminino , Humanos , Hipotireoidismo/fisiopatologia , Hipotireoidismo/psicologia , Exposição Materna , Testes Neuropsicológicos , Gravidez , Complicações na Gravidez/fisiopatologia , Complicações na Gravidez/psicologia , Efeitos Tardios da Exposição Pré-Natal/induzido quimicamente , Estudos Retrospectivos , Testes de Função Tireóidea
10.
Thromb Haemost ; 112(4): 727-35, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25008944

RESUMO

Previous thrombosis, diagnosis of systemic lupus erythematosus (SLE) and triple antiphospholipid (aPL) antibody positivity have recently been found to be independent factors associated to pregnancy failure during conventional therapy in women with antiphospholipid syndrome (APS). This study aimed to assess the effect of various treatment strategies on pregnancy outcomes in women with APS and the risk factors for pregnancy failure. One hundred ninety-six pregnancies of 156 patients diagnosed with APS were analysed: 118 (60.2%) of these had previous thrombosis, 81 (41.3%) were diagnosed with SLE, and 107 (54.6%) had triple aPL positivity. One hundred seventy-five (89.3%) were treated with conventional therapies (low-dose aspirin [LDA] or prophylactic doses of heparin + LDA or therapeutic doses of heparin + LDA), while 21 (10.7%) were prescribed other treatments in addition to conventional therapy. The pregnancies were classified into seven risk profiles depending on the patients' risk factors - thrombosis, SLE, and triple aPL positivity - and their single, double or triple combinations. It was possible to find significant difference in outcomes correlated to treatments only in the thrombosis plus triple aPL positivity subset, and logistic regression analysis showed that additional treatments were the only independent factor associated to a favourable pregnancy outcome (odds ratio=9.7, 95% confidence interval=1.1-88.9, p-value<0.05). On the basis of this retrospective study, we found that APS pregnant patients with thrombosis and triple aPL positivity treated with additional therapy had a significant higher live-birth rate with respect to those receiving conventional therapy alone.


Assuntos
Síndrome Antifosfolipídica/sangue , Síndrome Antifosfolipídica/complicações , Complicações Cardiovasculares na Gravidez , Resultado da Gravidez , Adulto , Anticorpos Antifosfolipídeos/imunologia , Aspirina/administração & dosagem , Europa (Continente) , Feminino , Heparina/administração & dosagem , Humanos , Imunoglobulina G/imunologia , Imunoglobulina M/imunologia , Lúpus Eritematoso Sistêmico/imunologia , Pessoa de Meia-Idade , Razão de Chances , Gravidez , Estudos Retrospectivos , Fatores de Risco , Trombose/sangue , Trombose/complicações
11.
Clin Chim Acta ; 430: 33-7, 2014 Mar 20.
Artigo em Inglês | MEDLINE | ID: mdl-24380740

RESUMO

BACKGROUND: Thyroid stimulating hormone (TSH) and free thyroxine (FT4) concentrations vary during pregnancy and conventional units can vary between laboratories. Reference ranges are widely quoted but are arbitrary and do not allow for inter-laboratory differences or gestational age. We therefore explored using multiple of the median (MoM) values to overcome these limitations. METHODS: TSH and FT4 concentrations from 16,346 UK and 5500 Italian women less than 16 weeks of gestation collected as part of the CATS study were converted into MoMs. Effects of maternal age, gestational age, maternal weight, smoking, parity and season of blood sampling were analysed and values adjusted for influencing factors. Distributions of adjusted MoMs were determined. RESULTS: TSH and FT4 (MoMs) significantly reduced the difference between UK and Italian samples (FT4>TSH) compared with conventional units. TSH and FT4 MoMs were statistically significantly influenced by weight, smoking and parity; season also influenced TSH and age influenced FT4. The first and 99th centile MoMs were TSH 0.2 and 4.01, and FT4 0.75 and 1.39. CONCLUSION: Use of TSH and FT4 MoMs in early pregnancy allows for systematic differences between laboratories and other factors. Their use indicates high or low levels in a quantitative manner independent of reference ranges.


Assuntos
Gravidez/sangue , Tireotropina/sangue , Tiroxina/sangue , Adulto , Feminino , Humanos , Valores de Referência , Adulto Jovem
12.
N Engl J Med ; 366(6): 493-501, 2012 Feb 09.
Artigo em Inglês | MEDLINE | ID: mdl-22316443

RESUMO

BACKGROUND: Children born to women with low thyroid hormone levels have been reported to have decreased cognitive function. METHODS: We conducted a randomized trial in which pregnant women at a gestation of 15 weeks 6 days or less provided blood samples for measurement of thyrotropin and free thyroxine (T(4)). Women were assigned to a screening group (in which measurements were obtained immediately) or a control group (in which serum was stored and measurements were obtained shortly after delivery). Thyrotropin levels above the 97.5th percentile, free T(4) levels below the 2.5th percentile, or both were considered a positive screening result. Women with positive findings in the screening group were assigned to 150 µg of levothyroxine per day. The primary outcome was IQ at 3 years of age in children of women with positive results, as measured by psychologists who were unaware of the group assignments. RESULTS: Of 21,846 women who provided blood samples (at a median gestational age of 12 weeks 3 days), 390 women in the screening group and 404 in the control group tested positive. The median gestational age at the start of levothyroxine treatment was 13 weeks 3 days; treatment was adjusted as needed to achieve a target thyrotropin level of 0.1 to 1.0 mIU per liter. Among the children of women with positive results, the mean IQ scores were 99.2 and 100.0 in the screening and control groups, respectively (difference, 0.8; 95% confidence interval [CI], -1.1 to 2.6; P=0.40 by intention-to-treat analysis); the proportions of children with an IQ of less than 85 were 12.1% in the screening group and 14.1% in the control group (difference, 2.1 percentage points; 95% CI, -2.6 to 6.7; P=0.39). An on-treatment analysis showed similar results. CONCLUSIONS: Antenatal screening (at a median gestational age of 12 weeks 3 days) and maternal treatment for hypothyroidism did not result in improved cognitive function in children at 3 years of age. (Funded by the Wellcome Trust UK and Compagnia di San Paulo, Turin; Current Controlled Trials number, ISRCTN46178175.).


Assuntos
Hipotireoidismo/diagnóstico , Inteligência , Complicações na Gravidez/diagnóstico , Diagnóstico Pré-Natal , Tireotropina/sangue , Tiroxina/uso terapêutico , Pré-Escolar , Feminino , Idade Gestacional , Humanos , Hipotireoidismo/tratamento farmacológico , Deficiência Intelectual/diagnóstico , Deficiência Intelectual/etiologia , Testes de Inteligência , Análise de Intenção de Tratamento , Masculino , Gravidez , Complicações na Gravidez/tratamento farmacológico , Segundo Trimestre da Gravidez/sangue , Efeitos Tardios da Exposição Pré-Natal/diagnóstico , Hormônios Tireóideos/metabolismo , Tiroxina/sangue
13.
Obstet Med ; 4(4): 156-9, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-27579115

RESUMO

OBJECTIVE: A preliminary report on the symptomatic effect of clonidine in severe hyperemesis gravidarum (HG). DESIGN: Observational. SETTTING: Hospital based: Ospedale Sant'Anna, Torino, Italy. POPULATION: Twelve pregnant women, 8-16 weeks, affected by severe, refractory HG. METHODS: Assessment by two clinical score indexes: Pregnancy Unique Quantification of Emesis (PUQE) score and a Visual Analogue Scale (VAS) 5-item questionnaire, filled out daily, to detect subjective improvement or worsening of symptoms. MAIN OUTCOME MEASURES: PUQE score and VAS score before and after transdermal clonidine treatment. RESULTS: We found substantial improvement of symptoms and severity score indexes after four and 14 days. The comparison of pretreatment and post-treatment scores shows a significant statistical difference P < 0.0001. CONCLUSION: Transdermal clonidine may be considered as a treatment for resistant severe HG.

14.
J Clin Endocrinol Metab ; 95(7): 3207-15, 2010 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-20427488

RESUMO

CONTEXT: Thyroid hormone, requiring adequate maternal iodine intake, is critical for fetal neurodevelopment. Perchlorate decreases thyroidal iodine uptake by competitively inhibiting the sodium/iodide symporter. It is unclear whether environmental perchlorate exposure adversely affects thyroid function in pregnant women. Thiocyanate, derived from foods and cigarette smoke, is a less potent competitive sodium/iodide symporter inhibitor than perchlorate. OBJECTIVE: Our objective was to determine whether environmental perchlorate and/or thiocyanate exposure is associated with alterations in thyroid function in pregnancy. DESIGN AND SETTING: We conducted a cross-sectional study at health centers in Cardiff, Wales, and Turin, Italy. PATIENTS: During 2002-2006, 22,000 women at less than 16 wk gestation were enrolled in the Controlled Antenatal Thyroid Screening Study. Subsets of 261 hypothyroid/hypothyroxinemic and 526 euthyroid women from Turin and 374 hypothyroid/hypothyroxinemic and 480 euthyroid women from Cardiff were selected based on availability of stored urine samples and thyroid function data. MAIN OUTCOME MEASURES: Urinary iodine, thiocyanate, and perchlorate and serum TSH, free T(4) (FT(4)), and thyroperoxidase antibody were measured. RESULTS: Urinary iodine was low: median 98 microg/liter in Cardiff and 52 microg/liter in Turin. Urine perchlorate was detectable in all women. The median (range) urinary perchlorate concentration was 5 microg/liter (0.04-168 microg/liter) in Turin and 2 microg/liter (0.02-368 microg/liter) in Cardiff. There were no associations between urine perchlorate concentrations and serum TSH or FT(4) in the individual euthyroid or hypothyroid/hypothyroxinemic cohorts. In multivariable linear analyses, log perchlorate was not a predictor of serum FT(4) or TSH. CONCLUSIONS: Low-level perchlorate exposure is ubiquitous but did not affect thyroid function in this cohort of iodine-deficient pregnant women.


Assuntos
Exposição Materna , Percloratos/toxicidade , Tiocianatos/toxicidade , Glândula Tireoide/efeitos dos fármacos , Adulto , Autoanticorpos/imunologia , Cromatografia por Troca Iônica , Estudos Transversais , Ensaio de Imunoadsorção Enzimática , Feminino , Inquéritos Epidemiológicos , Humanos , Imunoensaio , Iodo/urina , Itália , Espectrometria de Massas , Troca Materno-Fetal , Percloratos/urina , Gravidez , Primeiro Trimestre da Gravidez , Estudos Prospectivos , Análise de Regressão , Fumar , Tiocianatos/urina , Testes de Função Tireóidea , Glândula Tireoide/imunologia , Tireotropina/sangue , Tireotropina/imunologia , Tiroxina/sangue , Tiroxina/imunologia , País de Gales
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