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Duydu Y, Başaran N, Bolt HM. What can we learn from epidemiological studies on chronic boron exposure? Crit Rev Toxicol 2023:1-13. [PMID: 37351904 DOI: 10.1080/10408444.2023.2222151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/24/2023]
Abstract
Boric acid and sodium borates are classified as toxic to reproduction and development under category 1B, with the hazard statement of H360FD (May damage fertility. May damage the unborn child) in the EU-CLP regulation. This classification triggered environmental and occupational epidemiology studies on boron in China, Türkiye, and Argentina. The highest mean total daily boron exposure (DBE) levels in mining areas or processing plants in China and Türkiye were 41.2 and 47.17 mg/day, respectively. These DBE levels are higher than the proposed reference doses (RfDs) for the developmental (9.6 mg B/day) and reproductive effects (20.3 mg B/day) of boron in females and males. Despite these high exposure levels in occupational settings, boron-mediated reproductive and developmental effects have not been reported. Blood (or serum) boron concentrations were also reported in these studies. The highest mean blood-boron concentration reported for the boron-exposed male workers in Türkiye is 570.6 ng B/g (ppb). This blood-boron concentration is still much lower than the blood boron concentrations corresponding to the no observed adverse effect level (NOAEL) for both developmental and reproductive effects in rats. Given the blood boron concentrations reported in current epidemiological studies, the lack of reproductive and developmental effects in humans is not surprising. Recent epidemiological studies have proven that it will not be possible to reach the critical blood boron concentrations in humans for the reproductive and developmental effects, especially in daily life.
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Affiliation(s)
- Yalçın Duydu
- Department of Toxicology, Faculty of Pharmacy, Ankara University, Ankara, Türkiye
| | - Nurşen Başaran
- Department of Toxicology, Faculty of Pharmacy, Başkent University, Ankara, Türkiye
| | - Hermann M Bolt
- Leibniz Research Center for Working Environment and Human Factors (IfADo), Dortmund, Germany
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Bolt HM, Hengstler JG. Ricin: an ancient toxicant, but still an evergreen. Arch Toxicol 2023; 97:909-911. [PMID: 36881026 PMCID: PMC10025221 DOI: 10.1007/s00204-023-03472-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 02/21/2023] [Indexed: 03/08/2023]
Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factor at TU Dortmund (IfADo), Ardeystr. 67, 44139, Dortmund, Germany.
| | - Jan G Hengstler
- Leibniz Research Centre for Working Environment and Human Factor at TU Dortmund (IfADo), Ardeystr. 67, 44139, Dortmund, Germany
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3
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Bolt HM. The Janus face of uranium in toxicology. Arch Toxicol 2022; 96:689-690. [PMID: 35118510 PMCID: PMC8850217 DOI: 10.1007/s00204-022-03223-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/12/2022] [Indexed: 11/24/2022]
Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre on Working Environment and Human Factors (IfADo) Ardeystr. 67, 44139, Dortmund, Germany.
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Bolt HM, Hengstler JG. Commemorating 85 years of publications on Cannabis by Archives of Toxicology. Arch Toxicol 2021; 95:2231-2233. [PMID: 34052890 PMCID: PMC8241758 DOI: 10.1007/s00204-021-03079-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 05/17/2021] [Indexed: 12/12/2022]
Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Ardeystr. 67, 44139, Dortmund, Germany.
| | - Jan G Hengstler
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Ardeystr. 67, 44139, Dortmund, Germany
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Bolt HM. New aspects in snake venom toxicology. Arch Toxicol 2021; 95:1865-1866. [PMID: 33956164 PMCID: PMC8166695 DOI: 10.1007/s00204-021-03066-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 04/28/2021] [Indexed: 12/03/2022]
Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Ardeystr. 67, 44139, Dortmund, Germany.
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Bolt HM. Testing of female reproductive disorders. Arch Toxicol 2020; 94:3579-3580. [PMID: 32839845 PMCID: PMC7502046 DOI: 10.1007/s00204-020-02883-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 08/13/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors, Ardeystr. 67, 44139, Dortmund, Germany.
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Başaran N, Duydu Y, Bacanlı M, Gül Anlar H, DİLSİZ SA, Üstündağ A, Yalçın CÖ, Schwerdtle T, Bolt HM. Evaluation of oxidative stress and immune parameters of boron exposed males and females. Food Chem Toxicol 2020; 142:111488. [DOI: 10.1016/j.fct.2020.111488] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 05/31/2020] [Accepted: 06/02/2020] [Indexed: 02/08/2023]
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Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors, Ardeystr. 67, 44139, Dortmund, Germany.
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Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo), Adeystr. 67, 44139, Dortmund, Germany.
| | - Jan G Hengstler
- Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo), Adeystr. 67, 44139, Dortmund, Germany
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Affiliation(s)
- Hermann M Bolt
- Department of Toxicology, Leibniz Research Centre for Working Environment and Human Factors at TU, Dortmund (IfADo), Ardeystr. 67, 44139, Dortmund, Germany.
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Affiliation(s)
- Hermann M Bolt
- Department of Toxicology, Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo), Ardeystr. 67, 44139, Dortmund, Germany.
| | - Jan G Hengstler
- Department of Toxicology, Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo), Ardeystr. 67, 44139, Dortmund, Germany
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Bolt HM. High complexity of toxic reactions: parallels between products of oxidative stress and advanced glycation end products. Arch Toxicol 2020; 94:1373-1374. [PMID: 32239238 PMCID: PMC7261726 DOI: 10.1007/s00204-020-02727-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 03/26/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Hermann M Bolt
- Department of Toxicology, Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo), Ardeystr. 67, 44139, Dortmund, Germany.
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Bolt HM. Highlight Report: Adverse outcome pathways: the need of research on mechanisms of toxicity. Arch Toxicol 2019; 93:3385-3386. [PMID: 31637479 DOI: 10.1007/s00204-019-02596-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 10/08/2019] [Indexed: 11/26/2022]
Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors, Ardeystr. 67, 44139, Dortmund, Germany.
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Bolt HM. Highlight report: caspase 8 as a therapeutic target in chronic liver disease. Arch Toxicol 2019; 93:2709-2710. [PMID: 31422437 DOI: 10.1007/s00204-019-02535-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 08/12/2019] [Indexed: 10/26/2022]
Affiliation(s)
- Hermann M Bolt
- IfADo-Leibniz Research Centre for Working Environment and Human Factors, TU Dortmund, Ardeystr. 67, 44139, Dortmund, Germany.
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Bolt HM, Hengstler JG. Satirical contributions in toxicology. Arch Toxicol 2019; 93:1471. [PMID: 31250072 DOI: 10.1007/s00204-019-02482-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 05/14/2019] [Indexed: 10/26/2022]
Affiliation(s)
- Hermann M Bolt
- IfADo-Leibniz Research Centre for Working Environment and Human Factors, TU Dortmund, Ardeystr. 67, 44139, Dortmund, Germany
| | - Jan G Hengstler
- IfADo-Leibniz Research Centre for Working Environment and Human Factors, TU Dortmund, Ardeystr. 67, 44139, Dortmund, Germany.
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Başaran N, Duydu Y, Üstündağ A, Taner G, Aydin Dilsiz S, Anlar HG, Yalçin CÖ, Bacanli M, Golka K, Schwerdtle T, Bolt HM. 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. J Trace Elem Med Biol 2019; 53:150-153. [PMID: 30910199 DOI: 10.1016/j.jtemb.2019.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 03/04/2019] [Accepted: 03/08/2019] [Indexed: 01/12/2023]
Abstract
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 boron-poor 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.
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Affiliation(s)
- Nurşen Başaran
- Hacettepe University, Faculty of Pharmacy, Department of Pharmaceutical Toxicology, Ankara, Turkey.
| | - Yalçın Duydu
- Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Toxicology, Ankara, Turkey
| | - Aylin Üstündağ
- Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Toxicology, Ankara, Turkey
| | - Gökçe Taner
- Bursa Technical University, Faculty of Engineering and Natural Sciences, Department of Bioengineering, Bursa, Turkey
| | - Sevtap Aydin Dilsiz
- Hacettepe University, Faculty of Pharmacy, Department of Pharmaceutical Toxicology, Ankara, Turkey
| | - Hatice Gül Anlar
- Zonguldak Bülent Ecevit University, Faculty of Pharmacy, Department of Pharmaceutical Toxicology, Zonguldak, Turkey
| | - Can Özgür Yalçin
- Karadeniz Technical University, Faculty of Pharmacy, Department of Pharmaceutical Toxicology, Trabzon, Turkey
| | - Merve Bacanli
- Hacettepe University, Faculty of Pharmacy, Department of Pharmaceutical Toxicology, Ankara, Turkey
| | - Klaus Golka
- Leibniz Research Center for Working Environment and Human Factors (IfADo), Ardey Str. 67, 44139 Dortmund, Germany
| | - Tanja Schwerdtle
- University of Potsdam, Institute of Nutritional Science, Department of Food Chemistry, Arthur-Scheunert-Allee 114-116, 14558 Nuthetal, Germany
| | - Hermann M Bolt
- Leibniz Research Center for Working Environment and Human Factors (IfADo), Ardey Str. 67, 44139 Dortmund, Germany
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Bolt HM. Highlight report: Cell type selection for toxicity testing. EXCLI J 2019; 17:1180-1181. [PMID: 30713478 PMCID: PMC6341425 DOI: 10.17179/excli2018-2017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 12/18/2018] [Indexed: 11/13/2022]
Affiliation(s)
- H M Bolt
- IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund, GERMANY
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Duydu Y, Başaran N, Üstündağ A, Aydın S, Yalçın CÖ, Anlar HG, Bacanlı M, Aydos K, Atabekoğlu CS, Golka K, Ickstadt K, Schwerdtle T, Werner M, Meyer S, Bolt HM. Birth weights of newborns and pregnancy outcomes of environmentally boron-exposed females in Turkey. Arch Toxicol 2018; 92:2475-2485. [DOI: 10.1007/s00204-018-2238-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 06/04/2018] [Indexed: 12/21/2022]
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Bolt HM. Highlight report: Occupational urinary bladder cancer. EXCLI J 2018; 16:1319-1320. [PMID: 29333133 PMCID: PMC5763096 DOI: 10.17179/excli2017-1037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Accepted: 12/16/2017] [Indexed: 11/30/2022]
Affiliation(s)
- H M Bolt
- IfADo, Leibniz Research Centre for Working Environment and Human Factors, Dortmund
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Bolt HM. Additional evidence for the 'wimp SNP' concept of carcinogenesis. EXCLI J 2017; 16:1230-1232. [PMID: 29285018 PMCID: PMC5735334 DOI: 10.17179/excli2017-947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Accepted: 11/09/2017] [Indexed: 12/03/2022]
Affiliation(s)
- Hermann M Bolt
- IfADo, Leibniz Research Centre for Working Environment and Human Factors, Dortmund
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Affiliation(s)
- H M Bolt
- IfADo, Leibniz Research Centre for Working Environment and Human Factors, Dortmund
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Bolt HM. Highlight report: physiologically-based modeling of diseased liver tissue. Arch Toxicol 2017; 91:4017-4018. [PMID: 29177810 DOI: 10.1007/s00204-017-2134-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 11/23/2017] [Indexed: 11/28/2022]
Affiliation(s)
- H M Bolt
- IfADo-Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund, Ardeystr. 67, 44139, Dortmund, Germany.
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Bolt HM. Stem cells in toxicological research. Arch Toxicol 2017; 91:4029-4030. [PMID: 29143079 DOI: 10.1007/s00204-017-2120-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 11/13/2017] [Indexed: 11/25/2022]
Affiliation(s)
- Hermann M Bolt
- IfADo-Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund, Ardeystr. 67, 44139, Dortmund, Germany.
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Bolt HM. Extended analysis validates sample mix-up problem in gene expression datasets : Comment to: Panko B, Science 353, issue 6298, July 29, 2016: Sex problems? Researchers find 'widespread' mislabeling of the sex of human samples. Arch Toxicol 2016; 90:2825-2826. [PMID: 27638503 DOI: 10.1007/s00204-016-1848-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 09/05/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund, IfADo, Ardeystr. 67, 44139, Dortmund, Germany.
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Dickhut S, Urfer W, Reich S, Bandel T, Bremicker KD, Neugebauer W, Sökeland J, Bolt HM, Golka K. Occupational risk factors for prostate cancer in an area of former coal, iron, and steel industries in Germany. Part 1: Results from a study performed in the 1980s. J Toxicol Environ Health A 2016; 79:1125-1129. [PMID: 27924710 DOI: 10.1080/15287394.2016.1219605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Prostate cancer is the most frequent occurring malignancy in men in many Western countries. Unfortunately, only a few studies on occupational risk factors have been published. Thus, the aim of this study was to investigate possible occupational risk factors in a former center of coal, iron, and steel industries the greater Dortmund area, located in the western part of Germany. In three local departments of urology, a total of 238 prostate cancer cases and 414 patients with benign prostatic hyperplasia as controls were requested to provide information for all jobs ever performed for 6 mo or longer. Jobs performed less than 10 yr prior to diagnosis were excluded from the analysis due to the latency of prostate cancer. In addition, data on smoking habits and age were obtained. Analysis of data was performed by means of logistic regression. Hard coal miners and, based on fewer cases, painters, stratified by age, showed a significantly elevated prostate cancer risk. Smoking history did not influence prostate cancer risk. The causes of the observed increased prostate cancer risk in hard coal miners cannot be explained by merely the risk factor "male sexual hormones." In former decades, underground hard coal miners were exposed to high concentrations of dust and different xenobiotics such as hydraulic oils. Surprisingly, in a study performed about a decade later in the same area, prostate cancer risk in underground hard coal miners was found to be reduced. However, exposure to colorants was associated with an increased prostate cancer risk.
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Affiliation(s)
- Silvia Dickhut
- a Faculty of Statistics , TU Dortmund University , Dortmund , Germany
| | - Wolfgang Urfer
- a Faculty of Statistics , TU Dortmund University , Dortmund , Germany
| | - Susanne Reich
- a Faculty of Statistics , TU Dortmund University , Dortmund , Germany
| | - Tiemo Bandel
- b Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo) , Dortmund , Germany
| | | | | | - Jürgen Sökeland
- e Department of Urology , Klinikum Dortmund gGmbH , Dortmund , Germany
| | - Hermann M Bolt
- b Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo) , Dortmund , Germany
| | - Klaus Golka
- b Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo) , Dortmund , Germany
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Bolt HM. Highlight report: biomarkers of acetaminophen-induced liver injury. Arch Toxicol 2015; 89:2193-4. [PMID: 26531746 DOI: 10.1007/s00204-015-1629-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- H M Bolt
- Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund, IfADo, Ardeystr. 67, 44139, Dortmund, Germany.
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Bolt HM. Reviews on cutting-edge topics in toxicology. Arch Toxicol 2014; 88:2097. [PMID: 25428173 DOI: 10.1007/s00204-014-1418-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors at the Technical University of Dortmund (IfADo), 44139, Dortmund, Germany,
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Bolt HM. Current developments in toxicology. Arch Toxicol 2014; 88:2093-5. [PMID: 25428172 DOI: 10.1007/s00204-014-1417-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors at the Technical University of Dortmund (IfADo), 44139, Dortmund, Germany,
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Hammad S, Bolt HM. Current developments in nanosafety research. Arch Toxicol 2014; 88:2089-91. [PMID: 25420465 DOI: 10.1007/s00204-014-1403-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 10/23/2014] [Indexed: 11/26/2022]
Affiliation(s)
- Seddik Hammad
- Department of Forensic Medicine and Veterinary Toxicology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt,
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Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors at the TU Dortmund (IfADo), Ardeystr. 67, 44139, Dortmund, Germany,
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Affiliation(s)
- Klaus Golka
- Authors' Affiliation: Leibniz Research Centre for Working Environment and Human Factors (IfADo), Dortmund, Germany
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Weiss T, Bolt HM, Schlüter G, Koslitz S, Taeger D, Welge P, Brüning T. Metabolic dephenylation of the rubber antioxidant N-phenyl-2-naphthylamine to carcinogenic 2-naphthylamine in rats. Arch Toxicol 2013; 87:1265-72. [DOI: 10.1007/s00204-013-1025-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 02/06/2013] [Indexed: 11/29/2022]
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Bolt HM. Current developments in toxicological research on arsenic. EXCLI J 2013; 12:64-74. [PMID: 27092031 PMCID: PMC4827077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2013] [Accepted: 01/15/2013] [Indexed: 11/24/2022]
Abstract
There is a plethora of recent publications on all aspects relevant to the toxicology of arsenic (As). Over centuries exposures to arsenic continue to be a major public health problem in many countries. In particular, the occurrence of high As concentrations in groundwater of Southeast Asia receives now much attention. Therefore, arsenic is a high-priority matter for toxicological research. Key exposure to As are (traditional) medicines, combustion of As-rich coal, presence of As in groundwater, and pollution due to mining activities. As-induced cardiovascular disorders and carcinogenesis present themselves as a major research focus. The high priority of this issue is now recognized politically in a number of countries, research funds have been made available. Also experimental research on toxicokinetics and toxicodynamics and on modes of toxic action is moving very rapidly. The matter is of high regulatory concern, and effective preventive measures are required in a number of countries.
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Affiliation(s)
- Hermann M. Bolt
- Leibniz Research Centre for Working Environment and Human Factors (IfADo)
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Bolt HM, Morfeld P. New results on formaldehyde: the 2nd International Formaldehyde Science Conference (Madrid, 19-20 April 2012). Arch Toxicol 2013; 87:217-22. [PMID: 23138381 PMCID: PMC3535350 DOI: 10.1007/s00204-012-0966-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 10/23/2012] [Indexed: 12/19/2022]
Abstract
The toxicology and epidemiology of formaldehyde were discussed on the 2nd International Formaldehyde Science Conference in Madrid, 19-20 April 2012. It was noted that a substantial amount of new scientific data has appeared within the last years since the 1st conference in 2007. Progress has been made in characterisation of genotoxicity, toxicokinetics, formation of exogenous and endogenous DNA adducts, controlled human studies and epidemiology. Thus, new research results are now at hand to be incorporated into existing evaluations on formaldehyde by official bodies.
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Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre on Working Environment and Human Factors, TU Dortmund, Ardeystr. 67, 44139 Dortmund, Germany.
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Marchan R, Bolt HM. Imatinib: the controversial discussion on cardiotoxicity induced by endoplasmic reticulum (ER) stress. Arch Toxicol 2012; 86:339-40. [PMID: 22327847 DOI: 10.1007/s00204-012-0813-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Golka K, Kopps S, Prager HM, Mende SV, Thiel R, Jungmann O, Zumbe J, Bolt HM, Hengstler JG. Bladder cancer in crack testers applying azo dye-based sprays to metal bodies. Toxicol Lett 2012. [DOI: 10.1016/j.toxlet.2012.03.749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
Boric acid and sodium borates have been considered as being "toxic to reproduction and development", following results of animal studies with high doses. However unfavorable effects of boron exposure on reproduction and development have not been proved in epidemiological studies so far. The aim of the present study was to investigate the reproductive toxicity indicators in highly exposed workers employed in a boric acid production plant in Bandırma, Turkey. Two hundred and four workers participated in this study. The mean blood boron concentration of the high exposure group of workers was 223.89 ± 69.49 (152.82-454.02)ng/g. Unfavorable effects of boron exposure on the reproductive toxicity indicators were not observed.
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Affiliation(s)
- Nurşen Başaran
- Hacettepe University, Faculty of Pharmacy, Department of Toxicology, 06100 Sıhhiye, Ankara, Turkey.
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Abstract
Boric acid and sodium borates have been considered as being "toxic to reproduction and development", following results of animal studies with high doses. Experimentally, a NOAEL of 17.5mg B/kg-bw/day (corresponds to ∼2020 ng boron/g blood) has been identified for the (male) reproductive effects of boron in a multigenerational study of rats, and a NOAEL for the developmental effects in rats was identified at 9.6 mg B/kg-bw/day (corresponds to 1270 ng boron/g blood). These values are being taken as the basis of current EU safety assessments. The present study was conducted to assess the boron exposure under extreme exposure conditions in a boric acid production plant located in Bandırma, Turkey. The mean blood boron concentrations of low and high exposure groups were 72.94 ± 15.43 (48.46-99.91) and 223.89 ± 60.49 (152.82-454.02)ng/g respectively. The mean blood boron concentration of the high exposure group is still ≈ 6 times lower than the highest no effect level of boron in blood with regard to the developmental effects in rats and ≈ 9 times lower than the highest no effect level of boron in blood with regard to the reprotoxic effects in male rats. In this context, boric acid and sodium borates should not be considered as toxic to reproduction for humans in daily life.
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Affiliation(s)
- Yalçin Duydu
- Ankara University, Faculty of Pharmacy, Department of Toxicology, 06100 Tandoğan, Ankara, Turkey.
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Abstract
Cigarette smoking is a risk factor for bladder cancer. Since urothelial cells express phase I and II enzymes these cells are able to metabolize precarcinogens into DNA reactive intermediates. Cigarette smoke is a complex mixture containing at least 80 known carcinogens. In this context especially aromatic amines and polycyclic aromatic hydrocarbons are discussed as being responsible for bladder-carcinogenicity. Cell cultures of primary porcine urinary bladder epithelial cells (PUBEC) have been useful models for studies on bladder-specific effects. These cells are metabolically competent and found to be a valuable tool for examining effects of cigarette smoke constituents. In the present study PUBEC were utilized to investigate the effects of the complex mixture cigarette smoke condensate total particulate matter (CSC TPM) with emphasis on induction of cytochrome P-450 1A1 (CYP1A1) and genotoxic effects. CYP1A1 induction was investigated by Western blot and flow cytometry. The most pronounced effects were found after 24 h of incubation with 1-10 μg/ml CSC TPM. Maximal induction was observed at 5 μg/ml by flow cytometry and at 10 μg/ml by Western blot analysis. Genotoxic effects were investigated by means of alkaline single-cell gel electrophoresis ("comet assay") with and without the use of the DNA repair enzyme formamidopyrimidine-DNA glycosylase (Fpg) and the micronucleus (MN) test. A numerical concentration-dependent increase in Fpg-sensitive sites indicating oxidative DNA damage and a quantitative rise in MN formation were noted. The CSC utilized in this study contained low amounts of benzo[a]pyrene, 4-aminobiphenyl, and 2-naphthylamine. With regard to the observed CYP1A1 induction, these substances cannot explain the CYP1A1 inducing effect of CSC TPM. It is possible that other compounds within CSC TPM contribute to CYP1A1 induction in our cellular model.
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Affiliation(s)
- Sabine Plöttner
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Dortmund, Germany
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Golka K, Kopps S, Prager HM, Mende SV, Thiel R, Jungmann O, Zumbe J, Bolt HM, Blaszkewicz M, Hengstler JG, Selinski S. Bladder cancer in crack testers applying azo dye-based sprays to metal bodies. J Toxicol Environ Health A 2012; 75:566-571. [PMID: 22686317 DOI: 10.1080/15287394.2012.675309] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Bladder cancer may be produced by azo dyes due to the presence of carcinogenic aromatic amines. Nine cases of suspected occupational bladder cancer that were exposed to different crack test sprays in metal-related jobs were examined. A detailed occupational history was taken and, if possible, the N-acetyltransferase 2 (NAT2) status was determined. The first exposure to crack test sprays ranged from 1957 to 1986. Age at first exposure was between 14 and 33 yr. Age at first diagnosis of bladder cancer varied from 35 to 64 yr. Latency periods were between 17 and 45 yr. The maximal reported exposure period was 29 yr. Four of six genotyped cases were slow NAT2 acetylators. The handling of the crack test spray included spraying the red dye-containing matter on the metal body and washing off the spray with a rag. Thus, workers were exposed by dermal contact as well as by inhalation. The crack test spray, which makes the cracks visible after washing off the red testing spray compounds and applying an additional white spray, contained dyes such as solvent red 19 (Sudan red 7B, N-ethyl-1[[4-(phenylazo)phenyl]azo]-2-naphthylamine) or a mixture of p-phenylazoaniline-N-ethyl-2-naphthylamine and p-phenylazoaniline-N-ethyl-1-naphthylamine. The aromatic amine 2-naphthylamine is classified as human carcinogen by IARC and the national authorities and has been banned in many countries since the mid 1950s. Bladder cancer patients with metal-related jobs need to be explicitly asked about the use of crack test sprays.
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Affiliation(s)
- Klaus Golka
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Dortmund, Germany.
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Knoell KF, Will N, Leng G, Selinski S, Hengstler JG, Golka K, Bolt HM. Development of a strategy for biological monitoring in a chemical plant producing 3,3'-dichlorobenzidine dihydrochloride. J Toxicol Environ Health A 2012; 75:551-556. [PMID: 22686315 DOI: 10.1080/15287394.2012.675307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In a chemical plant in Germany producing 3,3'-dichlorobenzidine dihydrochloride for the manufacture of colorants, blood and urine samples were taken for biological monitoring. 3,3'-Dichlorobenzidine (DBZ) was analyzed in urine by thin-layer chromatography and subsequently further combined with analysis of adducts of 3,3'-DBZ in hemoglobin. Data highlight current ranges of industrial exposure to 3,3'-DBZ in Germany and demonstrate the applicability of biological monitoring to minimize this exposure. Effective biological monitoring was achieved by a combination of monitoring hemoglobin adducts with spot samplings of urinary 3,3'-DBZ excretion in cases of reported exposure periods. Data presented might help to identify biological guidance values (BGV/BAR) for 3,3'-DBZ-exposed individuals.
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Affiliation(s)
- Kristian F Knoell
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Dortmund, Germany
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Bolt HM, Başaran N, Duydu Y. Human environmental and occupational exposures to boric acid: reconciliation with experimental reproductive toxicity data. J Toxicol Environ Health A 2012; 75:508-514. [PMID: 22686310 DOI: 10.1080/15287394.2012.675301] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The reproductive toxicity of boric acid and borates is a matter of current regulatory concern. Based on experimental studies in rats, no-observed-adverse-effect levels (NOAELs) were found to be 17.5 mg boron (B)/kg body weight (b.w.) for male fertility and 9.6 mg B/kg b.w. for developmental toxicity. Recently, occupational human field studies in highly exposed cohorts were reported from China and Turkey, with both studies showing negative results regarding male reproduction. A comparison of the conditions of these studies with the experimental NOAEL conditions are based on reported B blood levels, which is clearly superior to a scaling according to estimated B exposures. A comparison of estimated daily B exposure levels and measured B blood levels confirms the preference of biomonitoring data for a comparison of human field studies. In general, it appears that high environmental exposures to B are lower than possible high occupational exposures. The comparison reveals no contradiction between human and experimental reproductive toxicity data. It clearly appears that human B exposures, even in the highest exposed cohorts, are too low to reach the blood (and target tissue) concentrations that would be required to exert adverse effects on reproductive functions.
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Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Dortmund, Germany.
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