TY  - JOUR
A1  - Duydu, Yalcin
A1  - Basaran, Nursen
A1  - Yalcin, Can Özgür
A1  - Ustundag, Aylin
A1  - Aydin, Sevtap
A1  - Anlar, Hatice Gul
A1  - Bacanli, Merve
A1  - Aydos, Kaan
A1  - Atabekoglu, Cem Somer
A1  - Golka, Klaus
A1  - Ickstadt, Katja
A1  - Schwerdtle, Tanja
A1  - Werner, Matthias
A1  - Bolt, Hermann M.
T1  - Boron-exposed male workers in Turkey
BT  - no change in sperm Y:X chromosome ratio and in offspring's sex ratio
JF  - Archives of toxicology : official journal of EUROTOX
N2  - Boron-associated shifts in sex ratios at birth were suggested earlier and attributed to a decrease in Y- vs. X-bearing sperm cells. As the matter is pivotal in the discussion of reproductive toxicity of boron/borates, re-investigation in a highly borate-exposed population was required. In the present study, 304 male workers in Bandirma and Bigadic (Turkey) with different degrees of occupational and environmental exposure to boron were investigated. Boron was quantified in blood, urine and semen, and the persons were allocated to exposure groups along B blood levels. In the highest ("extreme") exposure group (n = 69), calculated mean daily boron exposures, semen boron and blood boron concentrations were 44.91 +/- 18.32 mg B/day, 1643.23 +/- 965.44 ng B/g semen and 553.83 +/- 149.52 ng B/g blood, respectively. Overall, an association between boron exposure and Y:X sperm ratios in semen was not statistically significant (p > 0.05). Also, the mean Y:X sperm ratios in semen samples of workers allocated to the different exposure groups were statistically not different in pairwise comparisons (p > 0.05). Additionally, a boron-associated shift in sex ratio at birth towards female offspring was not visible. In essence, the present results do not support an association between boron exposure and decreased Y:X sperm ratio in males, even under extreme boron exposure conditions.
KW  - Paternal exposure
KW  - Boron exposure
KW  - Y:X chromosome ratio
KW  - Sex ratio at birth
Y1  - 2019
U6  - https://doi.org/10.1007/s00204-019-02391-z
SN  - 0340-5761
SN  - 1432-0738
VL  - 93
IS  - 3
SP  - 743
EP  - 751
PB  - Springer
CY  - Heidelberg
ER  - 
TY  - JOUR
A1  - Duydu, Yalcin
A1  - Basaran, Nursen
A1  - Ustundag, Aylin
A1  - Aydin, Sevtap
A1  - Yalcin, Can Ozgur
A1  - Anlar, Hatice Gul
A1  - Bacanli, Merve
A1  - Aydos, Kaan
A1  - Atabekoglu, Cem Somer
A1  - Golka, Klaus
A1  - Ickstadt, Katja
A1  - Schwerdtle, Tanja
A1  - Werner, Matthias
A1  - Meyer, Sören
A1  - Bolt, Hermann M.
T1  - Birth weights of newborns and pregnancy outcomes of environmentally boron-exposed females in Turkey
JF  - Archives of toxicology : official journal of EUROTOX
N2  - Boric acid and sodium borates are currently classified as being toxic to reproduction under "Category 1B" with the hazard statement of "H360 FD" in the European CLP regulation. This has prompted studies on boron-mediated reprotoxic effects in male workers in boron mining areas and boric acid production plants. By contrast, studies on boron-mediated developmental effects in females are scarce. The present study was designed to fill this gap. Hundred and ninety nine females residing in Bandirma and Bigadic participated in this study investigating pregnancy outcomes. The participants constituted a study group covering blood boron from low (< 100 ng B/g blood, n = 143) to high (> 150 ng B/g blood, n = 27) concentrations. The mean blood boron concentration and the mean estimated daily boron exposure of the high exposure group was 274.58 (151.81-975.66) ng B/g blood and 24.67 (10.47-57.86) mg B/day, respectively. In spite of the high level of daily boron exposure, boron-mediated adverse effects on induced abortion, spontaneous abortion (miscarriage), stillbirth, infant death, neonatal death, early neonatal death, preterm birth, congenital anomalies, sex ratio and birth weight of newborns were not observed.
KW  - Boric acid
KW  - Boron exposure
KW  - Biological monitoring
KW  - Developmental toxicity
KW  - Pregnancy outcomes
Y1  - 2018
U6  - https://doi.org/10.1007/s00204-018-2238-4
SN  - 0340-5761
SN  - 1432-0738
VL  - 92
IS  - 8
SP  - 2475
EP  - 2485
PB  - Springer
CY  - Heidelberg
ER  - 
TY  - JOUR
A1  - Duydu, Yalcin
A1  - Basaran, Nursen
A1  - Aydin, Sevtap
A1  - Ustundag, Aylin
A1  - Yalcin, Can Özgür
A1  - Anlar, Hatice Gul
A1  - Bacanli, Merve
A1  - Aydos, Kaan
A1  - Atabekoglu, Cem Somer
A1  - Golka, Klaus
A1  - Ickstadt, Katja
A1  - Schwerdtle, Tanja
A1  - Werner, Matthias
A1  - Meyer, Sören
A1  - Bolt, Hermann M.
T1  - Evaluation of FSH, LH, testosterone levels and semen parameters in male boron workers under extreme exposure conditions
JF  - Archives of toxicology : official journal of EUROTOX
N2  - Boric acid and sodium borates are currently classified in the EU-CLP regulation as "toxic to reproduction" under "Category 1B", with hazard statement of H360FD. However, so far field studies on male reproduction in China and in Turkey could not confirm such boron-associated toxic effects. As validation by another independent study is still required, the present study has investigated possible boron-associated effects on male reproduction in workers (n = 212) under different boron exposure conditions. The mean daily boron exposure (DBE) and blood boron concentration of workers in the extreme exposure group (n = 98) were 47.17 +/- 17.47 (7.95-106.8) mg B/day and 570.6 +/- 160.1 (402.6-1100) ng B/g blood, respectively. Nevertheless, boron-associated adverse effects on semen parameters, as well as on FSH, LH and total testosterone levels were not seen, even within the extreme exposure group. With this study, a total body of evidence has accumulated that allows to conclude that male reproductive effects are not relevant to humans, under any feasible and realistic conditions of exposure to inorganic boron compounds.
KW  - Boron exposure
KW  - Boric acid
KW  - Reproductive toxicity
KW  - FSH
KW  - LH
KW  - Testosterone
KW  - Semen parameters
Y1  - 2018
U6  - https://doi.org/10.1007/s00204-018-2296-7
SN  - 0340-5761
SN  - 1432-0738
VL  - 92
IS  - 10
SP  - 3051
EP  - 3059
PB  - Springer
CY  - Heidelberg
ER  - 
TY  - JOUR
A1  - Başaran, Nurşen
A1  - Duydu, Yalçın
A1  - Üstündağ, Aylin
A1  - Taner, Gökçe
A1  - Aydin Dilsiz, Sevtap
A1  - Anlar, Hatice Gül
A1  - Yalçin, Can Özgür
A1  - Bacanli, Merve
A1  - Golka, Klaus
A1  - Schwerdtle, Tanja
A1  - Bolt, Hermann M.
T1  - Environmental boron exposure does not induce DNA damage in lymphocytes and buccal cells of females DNA damage in lymphocytes and buccal cells of boron exposed females
JF  - Journal of trace elements in medicine and biology
N2  - Boron (B) compounds are essential for plants and animals and beneficial for humans in nutritional amounts. I animals and humans increasing evidence have shown beneficial effects on B compounds on nutrition and on antioxidant status. The genotoxic effects of environmental B exposure in women living in boron-rich and boronpoor areas was examined in this study. For this purpose, the DNA damage in the lymphocytes and buccal cells of females were assessed by Comet and micronucleus (MN) assays respectively. No significant difference was observed in the DNA damage of the lymphocytes of B exposed groups of female volunteers in Comet assay. Even buccal micronucleus (MN) frequency observed in the high exposure group was significantly lower than the low exposure group (p < 0.05). The results of this study came to the same conclusions of the previous studies that boron does not induce DNA damage even under extreme exposure conditions.
KW  - Boric acid
KW  - Boron exposure
KW  - DNA damage
Y1  - 2019
U6  - https://doi.org/10.1016/j.jtemb.2019.03.004
SN  - 0946-672X
VL  - 53
SP  - 150
EP  - 153
PB  - Elsevier B.V.
CY  - München
ER  - 
TY  - JOUR
A1  - Basaran, Nursen
A1  - Duydu, Yalcin
A1  - Ustundag, Aylin
A1  - Taner, Gokce
A1  - Aydin, Sevtap
A1  - Anlar, Hatice Gul
A1  - Yalcin, Can Özgür
A1  - Bacanli, Merve
A1  - Aydos, Kaan
A1  - Atabekoglu, Cem Somer
A1  - Golka, Klaus
A1  - Ickstadt, Katja
A1  - Schwerdtle, Tanja
A1  - Werner, Matthias
A1  - Meyer, Sören
A1  - Bolt, Hermann M.
T1  - Evaluation of the DNA damage in lymphocytes, sperm and buccal cells of workers under environmental and occupational boron exposure conditions
JF  - Mutation Research/Genetic Toxicology and Environmental Mutagenesis
N2  - Industrial production and use of boron compounds have increased during the last decades, especially for the manufacture of borosilicate glass, fiberglass, metal alloys and flame retardants. This study was conducted in two districts of Balikesir; Bandirma and Bigadic, which geographically belong to the Marmara Region of Turkey. Bandirma is the production and exportation zone for the produced boric acid and some borates and Bigadic has the largest B deposits in Turkey. 102 male workers who were occupationally exposed to boron from Bandirma and 110 workers who were occupationally and environmentally exposed to boron from Bigadic participated to our study. In this study the DNA damage in the sperm, blood and buccal cells of 212 males was evaluated by comet and micronucleus assays. No significant increase in the DNA damage in blood, sperm and buccal cells was observed in the residents exposed to boron both occupationally and environmentally (p = 0.861) for Comet test in the sperm samples, p = 0.116 for Comet test in the lymphocyte samples, p = 0.042 for micronucleus (MN) test, p = 0.955 for binucleated cells (BN), p = 1.486 for condensed chromatin (CC), p = 0.455 for karyorrhectic cells (KHC), p = 0.541 for karyolitic cells (KLY), p = 1.057 for pyknotic cells (PHC), p = 0.331 for nuclear bud (NBUD)). No correlations were seen between blood boron levels and tail intensity values of the sperm samples, lymphocyte samples, frequencies of MN, BN, KHC, KYL, PHC and NBUD. The results of this study came to the same conclusions of the previous studies that boron does not induce DNA damage even under extreme exposure conditions.
KW  - Boric acid
KW  - Boron exposure
KW  - DNA damage
KW  - Comet assay
Y1  - 2019
U6  - https://doi.org/10.1016/j.mrgentox.2018.12.013
SN  - 1383-5718
SN  - 1879-3592
VL  - 843
SP  - 33
EP  - 39
PB  - Elsevier
CY  - Amsterdam
ER  -