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Urinary cyclophosphamide excretion and micronuclei frequencies in peripheral lymphocytes and in exfoliated buccal epithelial cells of nurses handling antineoplastics

In this study, urinary cyclophosphamide (CP) excretion rate, as well as micronuclei (MN) in peripheral lymphocytes and in buccal epithelial cells were determined for 26 nurses handling antineoplastics and 14 referents matched for age and sex. In urine samples of 20 out of 25 exposed nurses CP excretion rate was found in a range of 0.02-9.14 microg CP/24 h. Our results of the analyses of CP in urine demonstrates that when the nurses were handling CP (and other antineoplastic drugs) this particular compound was observed in urine. The mean values (+/-SD) of MN frequencies (%) in peripheral lymphocytes from the nurses and controls were 0.61 (+/-0. 32) and 0.28 (+/-0.16), respectively (p<0.01). The mean value (+/-SD) of MN frequency (%) in buccal epithelial cells of nurses was 0.16 (+/-0.19) and also mean MN frequency in buccal epithelial cells for controls was found to be as 0.08 (+/-0.08), (p>0.05). Age, sex and smoking habits have not influenced the parameters analyzed in this study. Handling time of antineoplastics, use of protective equipment and handling frequency of drugs have no effect on urinary and cytogenetic parameters analyzed. No correlation was found between the urinary CP excretion and the cytogenetic findings in nurses. Neither could we find any relationship between two cytogenetic endpoints. Our results have identified the possible genotoxic damage of oncology nurses related to occupational exposure to at least one antineoplastic agent, which is used as a marker for drug handling. As a whole, there is concern that the present handling practices of antineoplastic drugs used in the several hospitals in Ankara will not be sufficient to prevent exposure.

Does cigarette smoking really have detrimental effects on outcomes of IVF

OBJECTIVE Cigarette smoke contains many toxic chemicals associated with poor reproductive outcome and reduced fertility. It also has a negative effect on sperm motility and morphology. The aim of this study was to analyze the effects of male and female cigarette smoking on the outcomes of in vitro fertilization (IVF). STUDY DESIGN In this comparative prospective analysis, the effects of smoking on outcomes of IVF including semen parameters, oocyte quality, fertilization rate, transfer day embryo scores and pregnancy rates were analyzed. For this purpose, patients were grouped based on their follicular or seminal fluid cotinine (a nicotine metabolite) levels as smokers and non-smokers (non-smokers: female (n=171), male (n=118), smokers: female (n=43), male (n=96)). RESULTS The mean age and baseline hormonal levels of all groups were found to be comparable. While the numbers of total and mature oocytes collected were higher in the smoker group (p=0.005 and p=0.006, respectively), oocyte quality index, fertilization rate, embryo development rate and pregnancy rate were not significantly different between the groups (p>0.05). Analysis based on the type of ovarian hyperstimulation protocol (GnRH agonist, antagonist and others) showed that within the antagonist group the mean age of smokers was significantly lower and the total number of collected oocytes was significantly higher compared with non-smokers. Cigarette smoking among men did not have a significant negative effect on outcomes of IVF whether their partners were smokers or nonsmokers. Regression analysis did not give any significant difference when male and/or female smoking status was analyzed for fertilization rates, transferred embryo qualities and clinical pregnancy rates. CONCLUSION Cigarette smoking does not have detrimental effects on outcomes of IVF.