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    Evaluation of the Relationship Between Thyroid Hormone Levels and Bisphenol A in Children Aged 6-14 Years
    (Wiley, 2025) Yildirim, Pinar Altun; Nazlican, Ersin; Haytoglu, Zeliha; Turan, Ihsan; Kilincli, Betul; Aydin, Asli Atasoy; Mengen, Eda; Daglioglu, Nebile
    BackgroundThe incidence of hypothyroidism in childhood is increasing. This study aimed to investigate the potential role of exposure to bisphenol A, an environmental endocrine disruptor, and its substitutes in the development of hypothyroidism. To this end, thyroid hormone levels and urinary bisphenol concentrations were compared in newly diagnosed hypothyroid children and a healthy control group. MethodsIn this case-control study, 51 newly diagnosed hypothyroid children aged 6-14 years were matched with 51 healthy controls. The association between thyroid hormone levels and urinary bisphenol levels was investigated by measuring urinary bisphenol levels in both the case and control groups. ResultsThere was no significant difference in age, sex or BMI percentile between the case and control groups. The groups were homogeneously distributed. When urinary bisphenol levels were examined, BPA, BPS, BPF and BPB were not detected in the control group. There was a significant difference between the groups in terms of urinary bisphenol BPS levels. The case group showed a mean total concentration of 16.5 ng/mL and a median of 5.8 ng/mL. Diagnosing hypothyroidism in the children can be considered by examining the bisphenol level. In the ROC analysis, if this level is over 1.3 and is considered positive for hypothyroidism, the sensitivity value is determined as 83.7% and the specificity value is 75%. ConclusionThis study demonstrated that at least 50% of the children in the case group had bisphenol concentrations exceeding the highest value recorded in the control group, suggesting that total BP levels could be used as a potential biomarker for hypothyroidism.
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    Öğe
    The risk estimation and assessment of heavy metal exposure by biomonitoring in the breast milk of mothers in the Cukurova Region, Turkey
    (Springer Heidelberg, 2022) Nazlican, Ersin; Arica, Enes; Goren, Ismail Ethem; Kilincli, Betul; Mete, Burak; Daglioglu, Nebile
    Toxic heavy metals released into the environment through various industrial processes have potential adverse effects on the environment and human health. In order to reveal these adverse health effects, it is vital to carry out toxicological studies by performing biomonitoring. This study aimed to assess the level of Cr, As, Cd, Hg, and Pb in the breast milk samples of mothers in the Cukurova region, Turkey, and its association with health risk to infants. Ten-milliliter postpartum milk samples were collected from 34 breast-feeding mothers in the first 2 months of their postpartum period and living in the Cukurova region, Adana. The measurement of target heavy metals levels was performed by using inductively coupled plasma mass spectroscopy (ICP-MS). The average breast milk levels of Cr, As, Cd, Hg, and Pb were 8.25, 1.64, 0.37, 2.60, and 12.12 mu g/L, respectively. Evaluation of breast milk samples for these toxic heavy metals revealed the high exposure level for Cr and As. However, the mothers who participated in the study were not occupationally exposed to these metals. This study showed that Cr, As, Cd, Hg, and Pb cross the placenta and blood-brain barrier prenatally and accumulate in breast milk postnatally.