Effects of Maternal Cigarette Smoking on Trace Element Levels and Steroidogenesis in the Maternal-Placental-Fetal Unit.

This study evaluates the interaction of toxic elements cadmium (Cd) and lead (Pb) due to exposure from cigarette smoking, essential elements, and steroidogenesis in the maternal-placental-fetal unit. In a cohort of 155 healthy, postpartum women with vaginal term deliveries in clinical hospitals in Zagreb, Croatia, samples of maternal blood/serum and urine, placental tissue, and umbilical cord blood/serum were collected at childbirth. The biomarkers determined were concentrations of Cd, Pb, iron (Fe), zinc (Zn), copper (Cu), and selenium (Se), and steroid hormones progesterone and estradiol in maternal and umbilical cord blood and the placenta. Three study groups were designated based on self-reported data on cigarette smoking habits and confirmed by urine cotinine levels: never smokers (n = 71), former smokers (n = 48), and active smokers (n = 36). Metal(loid)s, steroid hormones, urine cotinine, and creatinine levels were analyzed by ICP-MS, ELISA, GC-MS, and spectrophotometry. Cigarette smoking during pregnancy was associated with increased Cd levels in maternal, placental, and fetal compartments, Pb in the placenta, and with decreased Fe in the placenta. In active smokers, decreased progesterone and estradiol concentrations in cord blood serum were found, while sex steroid hormones did not change in either maternal serum or placenta. This study provides further evidence regarding toxic and essential metal(loid) interactions during prenatal life, and new data on sex steroid disruption in cord serum related to cigarette smoking. The results indicate that umbilical cord sex steroid levels may be a putative early marker of developmental origins of the future burden of disease related to harmful prenatal exposure to cigarette smoke.

The Role of Psychological Factors in the Outcome of In Vitro Fertilization in Women with Primary Infertility.

INTRODUCTION: Infertility is a multidimensional developmental crisis of the individual, couple, family and the population as a whole. This study concentrates on the psychological aspects of infertility treatment by in vitro fertilization (IVF). The aim of this study was to examine a connection between certain psychological factors - anxiety, depression, motivation for parenthood, styles of coping with stress - and the outcome of IVF. SUBJECTS AND METHODS: The study included 100 primarily infertile women aged 23-38 years, who underwent IVF procedure for the first time, at the Department of Gynaecology and Obstetrics of University Hospital Centre Zagreb. Regarding the outcome of IVF, they were divided into two groups, those with positive outcome (N=50), and those with negative outcome of IVF (N=50). We have applied: general data questionnaire, Parenthood motivation scale, COPE Inventory, and Depression, Anxiety, Stress Scales - 21. RESULTS: The dimension of motivation for parenthood Relationship and the styles of coping with stress Seeking emotional support, Planning and Active coping proved to be statistically significant predictors of IVF outcome. By increasing the results on the relationship, seeking emotional support and planning subscales, the likelihood of negative outcome was increased. By increasing the results on the active coping subscale, the likelihood of positive outcome was increased. Anxiety and depression symptoms did not prove to be statistically significant predictors of the IVF outcome. CONCLUSION: The role of psychological factors is important for understanding the diagnosis and treatment of infertility. They also provide the basis for creating guidelines for specific preventive and educational programs and for special forms of psychological counselling for individuals facing infertility.

Cigarette Smoking during Pregnancy: Effects on Antioxidant Enzymes, Metallothionein and Trace Elements in Mother-Newborn Pairs.

The effect of maternal smoking as a source of exposure to toxic metals Cd and Pb on superoxide dismutase (SOD) and glutathione peroxidase (GPx) activity, metallothionein (MT), Cd, Pb, Cu, Fe, Mn, Se and Zn concentrations were assessed in maternal and umbilical cord blood and placenta in 74 healthy mother-newborn pairs after term delivery. Sparse discriminant analysis (SDA) was used to identify elements with the strongest impact on the SOD, GPx and MT in the measured compartments, which was then quantified by multiple regression analysis. SOD activity was lower in maternal and cord plasma, and higher in the placenta of smokers compared to non-smokers, whereas GPx activity and MT concentration did not differ between the groups. Although active smoking during pregnancy contributed to higher maternal Cd and Pb concentrations, its contribution to the variability of SOD, GPx or MT after control for other elements identified by SDA was not significant. However, an impaired balance in the antioxidant defence observed in the conditions of relatively low-to-moderate exposure levels to Cd and Pb could contribute to an increased susceptibility of offspring to oxidative stress and risk of disease development later in life. Further study on a larger number of subjects will help to better understand complex interactions between exposure to toxic elements and oxidative stress related to maternal cigarette smoking.