Pregnant women are prone to iodine deficiency due to the increased need for iodine during gestation. Progress has recently occurred in establishing serum thyroglobulin (Tg) as an iodine status biomarker, but there is no accepted reference range for iodine sufficiency during pregnancy. An observational study was conducted in 164 pregnant women. At week 16 of gestation urinary iodine concentration (UIC), serum Tg, and thyroid functions were measured, and information on the type of iodine supplementation and smoking were recorded. The parameters of those who started iodine supplementation (≥150 μg/day) at least 4 weeks before pregnancy (n = 27), who started at the detection of pregnancy (n = 51), and who had no iodine supplementation (n = 74) were compared. Sufficient iodine supply was found in the studied population based on median UIC (162 μg/L). Iodine supplementation ≥150 μg/day resulted in higher median UIC regardless of its duration (nonusers: 130 μg/L vs. prepregnancy iodine starters: 240 μg/L, and pregnancy iodine starters: 205 μg/L, p < .001, and p = .023, respectively). Median Tg value of pregnancy starters was identical to that of nonusers (14.5 vs. 14.6 μg/L), whereas prepregnancy starters had lower median Tg (9.1 μg/L, p = .018). Serum Tg concentration at week 16 of pregnancy showed negative relationship (p = .010) with duration of iodine supplementation and positive relationship (p = .008) with smoking, a known interfering factor of iodine metabolism, by multiple regression analysis. Serum Tg at week 16 of pregnancy may be a promising biomarker of preconceptual and first trimester maternal iodine status, the critical early phase of foetal brain development.

Objective: To investigate factors affecting conscious iodine intake among pregnant and lactating women in a rural area in Hungary. Methods: Pregnant women were studied and followed during lactation. Urinary and breast milk iodine concentration (UIC and MIC) were measured by inductively coupled plasma mass spectrometry. Potential interfering factors, including age, educational status and smoking were assessed. Results: During pregnancy and lactation, mild iodine deficiency was observed; median UIC were 66 and 49 µg/L, respectively. Educational status was found to be a strong determinant of both iodine nutrition and smoking status during pregnancy (p < 0.01 and p < 0.001) and lactation (p < 0.001 and p < 0.01). While smoking and non-smoking lactating mothers had similar concentrations of urinary iodine (median UIC: 47 and 51 µg/L, p = 0.95), the breast milk of smoking mothers contained less iodine (median MIC: 150 and 203 µg/L, p = 0.03). Conclusions: Both low iodine intake and smoking contribute to the higher risk of iodine deficiency in women with lower educational status. In smokers, MIC is often low in spite of normal UIC, presumably due to the iodine transport blocking effect of the cigarette smoke towards breast milk; normal UIC may be misinterpreted as sufficient iodine supply towards the child. Antenatal health promotion strategies should focus on young women with lower educational status, even in regions where sufficient iodine intake has been achieved in non-pregnant adults.

Absztrakt: A szerzők egy multiplex endokrin neoplasia-2A (MEN2A) szindrómában szenvedő beteg esetét ismertetik, akinél 55 éves korban hasi panaszok miatti részletes kivizsgálás részeként derült fény kétoldali mellékvese-térfoglalásra és pajzsmirigygöbre. Az utóbbi miatt végzett thyreoidectomia szövettani lelete medullaris pajzsmirigy-carcinomát igazolt. A mellékvese-térfoglalások hormon- és képalkotó vizsgálatok alapján bilaterális phaeochromocytomának bizonyultak. Tünetmentes primer hyperparathyreosisra is fény derült. Laparoszkópos adrenalectomia és mellékpajzsmirigy-adenoma eltávolítása történt. A beteg pozitív családi anamnézise és a klinikai kép alapján felmerülő MEN2A-szindrómát genetikai vizsgálattal bizonyítottuk. Az elsőfokú rokonok szűrése során a beteg 25 éves lánygyermeke génhordozónak bizonyult, nála preventív thyreoidectomiára került sor, és a szövettan többgócú medullaris carcinomát igazolt. Az eset kapcsán a szerzők áttekintik a MEN2A-szindróma klinikai jellemzőit, és hangsúlyozzák a genetikai vizsgálat és a családszűrés fontosságát. Orv Hetil. 2020; 161(2): 75–79.

Introduction Thyroid eye disease (TED) is an autoimmune disease of the orbits. Once developed, complete cure is rare. Plasminogen activator inhibitor type 1 (PAI-1) contributes to remodeling of connective tissue and has a central role in the pathogenesis of TED. We aimed to test if the 4G/5G polymorphism of PAI-1 is a predictor of the development of moderate-to-severe TED. Methods A total of 185 patients with Graves’ disease, 87 of them with TED, 98 without TED, as well as 201 healthy controls, were studied. Genomic DNA was isolated from peripheral blood samples. The 4G/5G polymorphism of the PAI-1 gene was analyzed by allele-specific PCR, and the distribution of genotypes was calculated in each group. Plasma PAI-1 and thyroid hormone levels were measured by ELISA and ECLIA, respectively. Results The 4G/4G genotype was associated with the development of moderate-to-severe TED (OR = 2.54; 95% CI: 1.26–5.14; p < 0.01). The 4G/5G polymorphism of PAI-1 was not a predictor of plasma PAI-1 levels. Conclusion The 4G/4G genotype of PAI-1 is a risk factor for the development of moderate-to-severe TED. Patients with Graves’ disease who harbor this genotype may be candidates for special attention towards the development of TED.