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서울 거주 산모의 초유 중 노닐페놀 분석을 통한 인체노출평가
이빛나(Bitna Yi),김창성(Changsung Kim),박미정(Mijung Park),한유석(Yusok Han),이소정(Sojung Lee),양미희(Mihi Yan) 환경독성보건학회 2008 환경독성보건학회지 Vol.23 No.2
Biomonitoring of nonylphenol (NP), an endocrine disrupting chemical, is required in Korea to perform its proper regulation. Thus, we analyzed exposure levels of nonlyphenol (NP) in breast milk from the mothers who delivered babies within 10 days (N=325). We analyzed free and total forms of NP in breast milk with LC/MS/MS (LOD, 0.5 ppb). In addition, we obtained questionnaires concerning lifestyle from the subject. As results, ranges of total NP were < LOD-23.4㎍/ℓ (median, < LOD) and the estimated exposure level of the NP was lower than TDI (tolerable daily intake)s. However, we found that the levels of total NP in the mothers, who had some diseases such as thyroid disorders, were higher than those in healthy mothers (sick mothers, N=34, 3.51 ±4.98㎍/ℓ vs. normal, N=281, 2.07 ± 3.76㎍/ℓ; P < 0.05). In conclusion, we suggest that exposure monitoring of NP should be continuously performed, even though the risks of NP are not clear, yet.
이빛나(Bitna Yi),신혜정(Hye Jung Shin),나현경(Hyunkyung Na),이나경(Na Kyung Lee),양미희(Mihi Yang) 환경독성보건학회 2009 환경독성보건학회지 Vol.24 No.4
Over the a few decades, the incidences of obesity and associated metabolic syndrome diseases have been increased dramatically and resulted in a global health crisis. Recent findings suggest endocrine disrupting chemicals (EDCs) as an obesogen, because they disrupt normal development and homeostatic controls over adipogenesis and energy balance in obesity. Furthermore, risk of cardiovascular disease and mortality is elevated among those who were obese during childhood. Thus, we focused on etiology of obesity in children and performed biological monitoring of bisphenol A (BPA), which is a broadly exposed EDC in environment. Study subjects were age and sex-matched obese and normal children in Seoul (N=52; age, 8.67±1.46 years). Exposure levels of BPA were analyzed with HPLC/FLD as a conjugated form in urine. As results, ranges of urinary BPA were 0~54.38 ㎍/g creatinine (median, 4.57 ㎍/g creatinine). Levels of urinary BPA were 1.7 fold higher in the obese children than those in the controls (medians of obese and control children, 7.31 and 4.25 ㎍/g creatinine, respectively, p=0.22). In the near future, enlarge scaled studies should be performed to confirm the risk of BPA for obesity.