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Zhang XY, Zhang YH, Guo YY, Luo Y, Xu SS, Lu X, Liang NN, Wu HY, Huang YC, Xu DX. Arsenic exposure causes decline in sperm motility accompanied by energy metabolism disorders in mouse testes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 351:124060. [PMID: 38685555 DOI: 10.1016/j.envpol.2024.124060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/23/2024] [Accepted: 04/25/2024] [Indexed: 05/02/2024]
Abstract
Arsenic (As) is a notorious environmental toxicant widely present in various natural environments. As exposure has been correlated with the decline in sperm motility. Yet, the mechanism has not been fully elucidated. Adult male C57 mice were given 0, 1, or 15 mg/L NaAsO2 for 10 weeks. The mature seminiferous tubules and sperm count were decreased in As-exposed mice. Sperm motility and several sperm motility parameters, including average path velocity (VAP), straight-line velocity (VSL), curvilinear velocity (VCL), beat-cross frequency (BCF), linearity (LIN), straightness (STR), and amplitude of lateral head displacement (ALH), were declined in As-exposed mice. RNA sequencing and transcriptomics analyses revealed that differentially expressed genes (DEGs) were mainly enriched in metabolic pathways. Untargeted metabolomics analyses indicated that energy metabolism was disrupted in As-exposed mouse testes. Gene set enrichment analysis showed that glycolysis and oxidative phosphorylation were disturbed in As-exposed mouse testes. As-induced disruption of testicular glucose metabolism and oxidative phosphorylation was further validated by RT-PCR and Western blotting. In conclusion, As exposure causes decline in sperm motility accompanied by energy metabolism disorders in mouse testes.
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Affiliation(s)
- Xiao-Yi Zhang
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Yi-Hao Zhang
- School of Public Health, Anhui Medical University, Hefei, China
| | - Yue-Yue Guo
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Yan Luo
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Shan-Shan Xu
- Department of Public Health and General Medicine, Anhui University of Chinese Medicine, Hefei, China
| | - Xue Lu
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Nan-Nan Liang
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Hong-Yan Wu
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - Yi-Chao Huang
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China
| | - De-Xiang Xu
- Department of Toxicology, School of Public Health, Anhui Medical University, Hefei, China; Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Anhui Medical University, Hefei, China.
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Baj J, Flieger W, Barbachowska A, Kowalska B, Flieger M, Forma A, Teresiński G, Portincasa P, Buszewicz G, Radzikowska-Büchner E, Flieger J. Consequences of Disturbing Manganese Homeostasis. Int J Mol Sci 2023; 24:14959. [PMID: 37834407 PMCID: PMC10573482 DOI: 10.3390/ijms241914959] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/01/2023] [Accepted: 10/04/2023] [Indexed: 10/15/2023] Open
Abstract
Manganese (Mn) is an essential trace element with unique functions in the body; it acts as a cofactor for many enzymes involved in energy metabolism, the endogenous antioxidant enzyme systems, neurotransmitter production, and the regulation of reproductive hormones. However, overexposure to Mn is toxic, particularly to the central nervous system (CNS) due to it causing the progressive destruction of nerve cells. Exposure to manganese is widespread and occurs by inhalation, ingestion, or dermal contact. Associations have been observed between Mn accumulation and neurodegenerative diseases such as manganism, Alzheimer's disease, Parkinson's disease, Huntington's disease, and amyotrophic lateral sclerosis. People with genetic diseases associated with a mutation in the gene associated with impaired Mn excretion, kidney disease, iron deficiency, or a vegetarian diet are at particular risk of excessive exposure to Mn. This review has collected data on the current knowledge of the source of Mn exposure, the experimental data supporting the dispersive accumulation of Mn in the brain, the controversies surrounding the reference values of biomarkers related to Mn status in different matrices, and the competitiveness of Mn with other metals, such as iron (Fe), magnesium (Mg), zinc (Zn), copper (Cu), lead (Pb), calcium (Ca). The disturbed homeostasis of Mn in the body has been connected with susceptibility to neurodegenerative diseases, fertility, and infectious diseases. The current evidence on the involvement of Mn in metabolic diseases, such as type 2 diabetes mellitus/insulin resistance, osteoporosis, obesity, atherosclerosis, and non-alcoholic fatty liver disease, was collected and discussed.
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Affiliation(s)
- Jacek Baj
- Chair and Department of Anatomy, Medical University of Lublin, 20-090 Lublin, Poland; (W.F.); (A.F.)
| | - Wojciech Flieger
- Chair and Department of Anatomy, Medical University of Lublin, 20-090 Lublin, Poland; (W.F.); (A.F.)
| | - Aleksandra Barbachowska
- Department of Plastic, Reconstructive and Burn Surgery, Medical University of Lublin, 21-010 Łęczna, Poland;
| | - Beata Kowalska
- Department of Water Supply and Wastewater Disposal, Lublin University of Technology, 20-618 Lublin, Poland;
| | - Michał Flieger
- Chair and Department of Forensic Medicine, Medical University of Lublin, 20-090 Lublin, Poland; (M.F.); (G.T.); (G.B.)
| | - Alicja Forma
- Chair and Department of Anatomy, Medical University of Lublin, 20-090 Lublin, Poland; (W.F.); (A.F.)
| | - Grzegorz Teresiński
- Chair and Department of Forensic Medicine, Medical University of Lublin, 20-090 Lublin, Poland; (M.F.); (G.T.); (G.B.)
| | - Piero Portincasa
- Clinica Medica A. Murri, Department of Biomedical Sciences & Human Oncology, Medical School, University of Bari, 70124 Bari, Italy;
| | - Grzegorz Buszewicz
- Chair and Department of Forensic Medicine, Medical University of Lublin, 20-090 Lublin, Poland; (M.F.); (G.T.); (G.B.)
| | | | - Jolanta Flieger
- Department of Analytical Chemistry, Medical University of Lublin, 20-093 Lublin, Poland
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Gomes-Silva AP, Cunha de Medeiros PD, Silva LN, Da Silva Araújo Santiago M, Perobelli JE. Exposure to manganese during sertoli cell formation and proliferation disturbs early testicular development in rats. Reprod Toxicol 2023; 120:108447. [PMID: 37499885 DOI: 10.1016/j.reprotox.2023.108447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 07/12/2023] [Accepted: 07/19/2023] [Indexed: 07/29/2023]
Abstract
Manganese (Mn) is a metal and important micronutrient. However, exposure to supraphysiological levels of Mn, which occur through fungicides, atmospheric emissions, drainages, and spills, has been related to health risks, including morphometric changes in the male reproductive organs and impairment on gametogenesis and sperm quality, impacting the fertile ability of adult animals. Despite the relevance of the fetal/perinatal period for toxicological studies on Mn, previous data only deal with the physical and neurological development of the offspring, without mentioning their reproductive development. The present study investigated whether exposure to Mn during fetal/perinatal phase, specifically during the period of formation and proliferation of Sertoli cells, impairs the reproductive development of male offspring in early postnatal life. Therefore, pregnant Wistar rats were randomly distributed into 3 experimental groups: Ctl (received saline solution), Mn-9 (received 9 mg/kg of MnCl2), and Mn-90 (received 90 mg/kg of MnCl2). The female rats received the experimental treatment by gavage from gestational day 13 to lactational day 15, i.e., postnatal day (PND) 15 of the pups. Oxidative damage to the genetic material of germ and Sertoli cells, together with a decrease in connexin 43 immunolabeling were observed in the testis of male pups evaluated at PND 15. In addition, an increase in the seminiferous tubules presenting slight epithelium vacuolization and cells with eosinophilic cytoplasm were observed, without apparent epididymal changes. In conclusion, it was demonstrated that Mn perturbed the initial testicular development by altering Sertoli cell integrity through oxidative insult, which may compromise the spermatogenesis in the long-term.
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Affiliation(s)
- Ana Priscila Gomes-Silva
- Laboratory of Experimental Toxicology - LATOEX, Universidade Federal de São Paulo, Instituto do Mar, Carvalho de Mendonça, 144, 11070-100 Santos, SP, Brazil
| | - Paloma da Cunha de Medeiros
- Laboratory of Experimental Toxicology - LATOEX, Universidade Federal de São Paulo, Instituto do Mar, Carvalho de Mendonça, 144, 11070-100 Santos, SP, Brazil
| | - Laís Nogueira Silva
- Laboratory of Experimental Toxicology - LATOEX, Universidade Federal de São Paulo, Instituto do Mar, Carvalho de Mendonça, 144, 11070-100 Santos, SP, Brazil
| | - Marcella Da Silva Araújo Santiago
- Laboratory of Experimental Toxicology - LATOEX, Universidade Federal de São Paulo, Instituto do Mar, Carvalho de Mendonça, 144, 11070-100 Santos, SP, Brazil
| | - Juliana Elaine Perobelli
- Laboratory of Experimental Toxicology - LATOEX, Universidade Federal de São Paulo, Instituto do Mar, Carvalho de Mendonça, 144, 11070-100 Santos, SP, Brazil.
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Shi X, Ren MQ, Wang LT, Chan CPS, Chan DYL, Quan S, Li TC. Blood metal/metalloid concentration of male subjects undergoing IVF/ICSI treatment outcomes: A prospective cohort study. J Trace Elem Med Biol 2023; 78:127196. [PMID: 37209528 DOI: 10.1016/j.jtemb.2023.127196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 04/26/2023] [Accepted: 05/05/2023] [Indexed: 05/22/2023]
Abstract
BACKGROUND Previous epidemiology studies reported that heavy metal/metalloid exposure is associated with the impairment of semen quality. However, it is still not clear whether the in vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI) treatment outcome will be affected after the heavy metal/metalloid exposure of the male partners. METHODS A prospective cohort study with a 2-year followed-up was conducted in a tertiary IVF center. A total of 111 couples undergoing IVF/ICSI treatment were initially recruited from November 2015 to November 2016. Male blood concentrations of heavy metal/metalloid including Ca, Cr, Mn, Fe, Ni, Cu, Zn, As, Se, Mo, Cd, Hg, and Pb were measured by inductively coupled plasma mass spectrometry, and the lab and pregnancy outcome data were followed up. The associations between male blood heavy metal/metalloid concentration and the clinical outcomes were analyzed by Poisson regression analysis. RESULTS Our results showed that none of the heavy metal/metalloid of male partners we investigated are significantly associated with the oocyte fertilization and good embryo (P ≥ 0.05); however, antral follicle count (AFC) was a protective factor for the oocyte fertilization (RR: 1.07, 95 % CI: 1.04-1.10). The blood Fe concentration of the male partner was positively associated (P < 0.05) with pregnancy in the first fresh cycle (RR:170.93, 95 % CI: 4.13-7082.04), cumulative pregnancy (RR: 23.61, 95 % CI: 3.25-171.64) and cumulative live birth (RR: 36.42, 95 % CI: 1.21-1092.54). In the first frozen embryo cycles, pregnancy was significantly associated (P < 0.05) with the blood Mn (RR: 0.01, 95 % CI:0.00-0.11) and Se concentration (RR: 0.01, 95 % CI:8.25 E-5-0.47) and female age (RR: 0.86, 95 % CI:0.75-0.99); live birth was significantly associated (P < 0.05) with the blood Mn concentration (RR: 0.00, 95 % CI: 1.14E-7-0.51). CONCLUSIONS Our results suggested that the higher male blood Fe concentration was positively associated with pregnancy in the fresh embryo transfer cycle, cumulative pregnancy, and cumulative live birth, whereas the higher male blood Mn and Se concentration were associated with lower chance of pregnancy and live birth in the frozen embryo transfer cycle. However, the underline mechanism of this finding still needs further investigation.
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Affiliation(s)
- Xiao Shi
- Center for Reproductive Medicine, Department of Obstetrics and Gynaecology, NanFang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Mei Qi Ren
- Center for Reproductive Medicine, Department of Obstetrics and Gynaecology, NanFang Hospital, Southern Medical University, Guangzhou, Guangdong, China; The First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Lian Tong Wang
- Center for Reproductive Medicine, Department of Obstetrics and Gynaecology, NanFang Hospital, Southern Medical University, Guangzhou, Guangdong, China; The First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Carol Pui Shan Chan
- Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong
| | - David Yiu Leung Chan
- Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong
| | - Song Quan
- Center for Reproductive Medicine, Department of Obstetrics and Gynaecology, NanFang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - Tin-Chiu Li
- Assisted Reproductive Technology Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong.
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Influence of water quality and pollution on broiler's performance, vaccine and antibiotic efficiencies. ANNALS OF ANIMAL SCIENCE 2023. [DOI: 10.2478/aoas-2023-0023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Abstract
Good water quality for livestock is critical for preserving animal health, ensuring the quality of animal products, supplying safe food, and increasing food production economics. Higher water levels of toxic compounds than permitted can impair meat, fat, eggs, and milk production, lower fertility, and represent public health hazards. Water picks up pollutants from its surroundings and those caused by animal and human activities. Many physicochemical parameters were used to ensure water quality, including pH, salt, taste, color, alkalinity, odor, and hardness. Water quality, directly and indirectly, impacts livestock performance and, thus, the poultry industry. Employing drinking water as a carrier of drugs still faces substantial barriers. The effectiveness of vaccinations and drugs is affected by inadequate water quality. Furthermore, contaminated water and poor nutrition negatively affect broiler chicken immunity, survival, and production. Antibiotics are widely utilized in poultry production to preserve animal health and growth. They can eliminate harmful bacteria in the gut, reduce the load on the immune system, optimize the digestive system, and boost growth performance. However, the abuse of antibiotics in animal agriculture has resulted in antibiotic-resistant infections threatening people and animals. As a result of its positive impact on the metabolome and gut microbiome, the natural antimicrobial combination could be used as an alternative; improving broiler chicken growth performance without negatively affecting the environment is currently paramount.
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6
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Maciejewski R, Radzikowska-Büchner E, Flieger W, Kulczycka K, Baj J, Forma A, Flieger J. An Overview of Essential Microelements and Common Metallic Nanoparticles and Their Effects on Male Fertility. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph191711066. [PMID: 36078782 PMCID: PMC9518444 DOI: 10.3390/ijerph191711066] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/01/2022] [Accepted: 09/02/2022] [Indexed: 05/17/2023]
Abstract
Numerous factors affect reproduction, including stress, diet, obesity, the use of stimulants, or exposure to toxins, along with heavy elements (lead, silver, cadmium, uranium, vanadium, mercury, arsenic). Metals, like other xenotoxins, can cause infertility through, e.g., impairment of endocrine function and gametogenesis or excess production of reactive oxygen species (ROS). The advancement of nanotechnology has created another hazard to human safety through exposure to metals in the form of nanomaterials (NMs). Nanoparticles (NPs) exhibit a specific ability to penetrate cell membranes and biological barriers in the human body. These ultra-fine particles (<100 nm) can enter the human body through the respiratory tract, food, skin, injection, or implantation. Once absorbed, NPs are transported to various organs through the blood or lymph. Absorbed NPs, thanks to ultrahigh reactivity compared to bulk materials in microscale size, disrupt the homeostasis of the body as a result of interaction with biological molecules such as DNA, lipids, and proteins; interfering with the functioning of cells, organs, and physiological systems; and leading to severe pathological dysfunctions. Over the past decades, much research has been performed on the reproductive effects of essential trace elements. The research hypothesis that disturbances in the metabolism of trace elements are one of the many causes of infertility has been unquestionably confirmed. This review examines the complex reproductive risks for men regarding the exposure to potentially harmless xenobiotics based on a series of 298 articles over the past 30 years. The research was conducted using PubMed, Web of Science, and Scopus databases searching for papers devoted to in vivo and in vitro studies related to the influence of essential elements (iron, selenium, manganese, cobalt, zinc, copper, and molybdenum) and widely used metallic NPs on male reproduction potential.
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Affiliation(s)
| | | | - Wojciech Flieger
- Department of Anatomy, Medical University of Lublin, 20-090 Lublin, Poland
| | - Kinga Kulczycka
- Institute of Health Sciences, John Paul II Catholic University of Lublin, 20-708 Lublin, Poland
| | - Jacek Baj
- Department of Anatomy, Medical University of Lublin, 20-090 Lublin, Poland
| | - Alicja Forma
- Department of Forensic Medicine, Medical University of Lublin, ul. Jaczewskiego 8B, 20-090 Lublin, Poland
| | - Jolanta Flieger
- Department of Analytical Chemistry, Medical University of Lublin, Chodźki 4A, 20-093 Lublin, Poland
- Correspondence: ; Tel.: +48-81448-7182
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7
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Cen C, Wang F, Xiong K, Jiang L, Hou X. Protective effects of Coridius chinensis extracts on rat reproductive damage induced by manganese. Andrologia 2021; 54:e14326. [PMID: 34820869 PMCID: PMC9285684 DOI: 10.1111/and.14326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 10/22/2021] [Accepted: 11/04/2021] [Indexed: 11/30/2022] Open
Abstract
Manganese (Mn2+ ) is an environmental pollutant, and testis is one of the main target organs. Coridius chinensis (C. chinensis), a traditional Chinese medicine, has been shown widely used in treating various kinds of pain, nephropathy and erectile dysfunction. In our recent study, we found that Mn2+ exposure caused testicular injury could be rescued in part by the antioxidant activity of C. chinensis extracts (CcE). However, there is dearth of extensive knowledge on the therapeutic effects of C. chinensis on manganese-induced reproductive toxicity. In the present study, Sprague-Dawley (SD) rats were administered manganese chloride alone or co-treated with CcE for 30 consecutive days. Results indicated that C. chinensis mediated suppression of spermatogenic dysfunction, and the number of apoptotic cells was significantly decreased in CcE-treated groups. Furthermore, the disintegrated testicular ultrastructural structure caused by Mn2+ was partially repaired in CcE-treated groups. C. chinensis significantly inhibited Mn2+ -induced decline in biomarkers of blood-testis barrier (BTB) including occludin, claudin1, zonula occludens-1 and junctional adhesion molecule 1, whereas it decreased the expression of focal adhesion kinase (FAK) and c-Src. This study demonstrated that c-Src and FAK might be involved in the repair of Mn2+ -induced testicular injury by C. chinensis, but further research is needed.
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Affiliation(s)
- Changhuo Cen
- Department of Cell Biology, Zunyi Medical University, Zunyi, China
| | - Fengyue Wang
- Department of Cell Biology, Zunyi Medical University, Zunyi, China
| | - Keyi Xiong
- Department of Cell Biology, Zunyi Medical University, Zunyi, China
| | - Lin Jiang
- Department of Cell Biology, Zunyi Medical University, Zunyi, China
| | - Xiaohui Hou
- Department of Cell Biology, Zunyi Medical University, Zunyi, China
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8
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Souza TL, Batschauer AR, Brito PM, Martino-Andrade AJ, Ortolani-Machado CF. Evaluation of testicular structure in mice after exposure to environmentally relevant doses of manganese during critical windows of development. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 207:111537. [PMID: 33254399 DOI: 10.1016/j.ecoenv.2020.111537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 09/29/2020] [Accepted: 10/16/2020] [Indexed: 06/12/2023]
Abstract
Despite being an essential trace element with great importance for vital metabolic activities, the manganese (Mn) can also cause damage to organ systems. However, data on the effect of this metal on the male reproductive system are limited, especially using relevant doses to human exposure. The present study aimed to evaluate and compare the effects of Mn exposure on the testicular structure of mice. Three experiments were conducted: (I) direct exposure to realistic doses (0.013, 0.13, and 1.3 mg/kg/day of MnCl2); (II) parental and direct exposure to realistic doses (as in experiment I), where the animals were exposed during intrauterine development and from lactation until reproductive maturity; (III) direct exposure to high doses (15, 30, and 60 mg/kg/day of MnCl2). Biometric, histopathological, histomorphometric and stereological parameters of the testis were evaluated, in addition to sperm morphology. Bioinformatic analyses were performed to identify potential Mn binding sites in 3β-HSD and P450ssc, as well as their protein-protein interaction network. The results obtained were compared using the integrated biomarker response index (IBR). There was an increase of seminiferous tubules pathologies in all experimental conditions tested, with effects on tubular volume, as well as a reduction in tubular diameter. The IBR analyses showed that parental and direct exposure had a significant negative effect on the testicular structure due to the exposure of this metal to sensitive periods of animal development. This study suggests that Mn has the potential to alter the morphological parameters of the testes, affecting the spermatogenesis in mice.
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Affiliation(s)
- Tugstênio L Souza
- Laboratory of Embryotoxicology, Department of Cell Biology, Federal University of Paraná, Curitiba, PR, Brazil.
| | - Amândia R Batschauer
- Laboratory of Embryotoxicology, Department of Cell Biology, Federal University of Paraná, Curitiba, PR, Brazil
| | - Patricia M Brito
- Laboratory of Cell Toxicology, Department of Cell Biology, Federal University of Paraná, Curitiba, PR, Brazil
| | - Anderson J Martino-Andrade
- Laboratory of Endocrine Physiology and Animal Reproduction, Department of Physiology, Federal University of Paraná, Curitiba, PR, Brazil
| | - Claudia F Ortolani-Machado
- Laboratory of Embryotoxicology, Department of Cell Biology, Federal University of Paraná, Curitiba, PR, Brazil
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9
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Wu F, Yang H, Liu Y, Yang X, Xu B, Liu W, Xu Z, Deng Y. Manganese exposure caused reproductive toxicity of male mice involving activation of GnRH secretion in the hypothalamus by prostaglandin E2 receptors EP1 and EP2. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 201:110712. [PMID: 32502905 DOI: 10.1016/j.ecoenv.2020.110712] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 05/05/2020] [Accepted: 05/06/2020] [Indexed: 05/19/2023]
Abstract
Exposure to manganese (Mn) can cause male reproductive damage and lead to abnormal secretion of sex hormones. Gonadotropin-releasing hormone (GnRH) plays an important role in the neuromodulation of vertebrate reproduction. Astrocytes can indirectly regulate the secretion of GnRH by binding paracrine prostaglandin E2 (PGE2) specifically to the EP1 and EP2 receptors on GnRH neurons. Prior studies assessed the abnormal secretion of GnRH caused by Mn exposure, but the specific mechanism has not been reported in detail. This study investigated the effects of Mn exposure on the reproductive system of male mice to clarify the role of PGE2 in the abnormal secretion of GnRH in the hypothalamus caused by exposure to Mn. Our data demonstrate that antagonizing the EP1 and EP2 receptors of PGE2 can restore abnormal levels of GnRH caused by Mn exposure. Mn exposure causes reduced sperm count and sperm shape deformities. These findings suggest that EP1 and EP2, the receptors of PGE2, may be the key to abnormal GnRH secretion caused by Mn exposure. Antagonizing the PGE2 receptors may reduce reproductive damage caused by Mn exposure.
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Affiliation(s)
- Fengdi Wu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, People's Republic of China; Department of Medical, Second Affiliated Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, People's Republic of China
| | - Haibo Yang
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, People's Republic of China; Department of Occupational Diseases, Linyi People's Hospital, Shandong, People's Republic of China
| | - Yanan Liu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, People's Republic of China
| | - Xinxin Yang
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, People's Republic of China
| | - Bin Xu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, People's Republic of China
| | - Wei Liu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, People's Republic of China
| | - Zhaofa Xu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, People's Republic of China
| | - Yu Deng
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang, People's Republic of China.
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10
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Souza TL, Batschauer AR, Brito PM, Leão-Buchir J, Spercoski KM, Neto FF, Martino-Andrade AJ, Ortolani-Machado CF. Evaluation of Mn exposure in the male reproductive system and its relationship with reproductive dysfunction in mice. Toxicology 2020; 441:152504. [DOI: 10.1016/j.tox.2020.152504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/24/2020] [Accepted: 05/18/2020] [Indexed: 12/16/2022]
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11
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Owumi SE, Danso OF, Nwozo SO. Gallic acid and omega‐3 fatty acids mitigate epididymal and testicular toxicity in manganese‐treated rats. Andrologia 2020; 52:e13630. [DOI: 10.1111/and.13630] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 02/15/2020] [Accepted: 04/12/2020] [Indexed: 12/16/2022] Open
Affiliation(s)
- Solomon E. Owumi
- Cancer Research and Molecular Biology Laboratories Department of Biochemistry Faculty of Basic Medical Sciences University of Ibadan Ibadan Nigeria
| | - Olabisi F. Danso
- Industrial and Nutritional Biochemistry Department of Biochemistry Faculty of Basic Medical Sciences University of Ibadan Ibadan Nigeria
| | - Sarah O. Nwozo
- Industrial and Nutritional Biochemistry Department of Biochemistry Faculty of Basic Medical Sciences University of Ibadan Ibadan Nigeria
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12
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Diet and Nutritional Factors in Male (In)fertility-Underestimated Factors. J Clin Med 2020; 9:jcm9051400. [PMID: 32397485 PMCID: PMC7291266 DOI: 10.3390/jcm9051400] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/05/2020] [Accepted: 05/07/2020] [Indexed: 12/12/2022] Open
Abstract
In up to 50% of cases, infertility issues stem solely from the male. According to some data, the quality of human semen has deteriorated by 50%–60% over the last 40 years. A high-fat diet and obesity, resulting from an unhealthy lifestyle, affects the structure of spermatozoa, but also the development of offspring and their health in later stages of life. In obese individuals, disorders on the hypothalamic-pituitary-gonadal axis are observed, as well as elevated oestrogen levels with a simultaneous decrease in testosterone, luteinizing hormone (LH), and follicle-stimulating hormone (FSH) levels. Healthy dietary models clearly correlate with better sperm quality and a smaller risk of abnormalities in parameters such as sperm count, sperm concentration and motility, and lower sperm DNA fragmentation. Apart from mineral components such as zinc and selenium, the role of omega-3 fatty acids and antioxidant vitamins should be emphasized, since their action will be primarily based on the minimization of oxidative stress and the inflammation process. Additionally, the incorporation of carnitine supplements and coenzyme Q10 in therapeutic interventions also seems promising. Therefore, it is advisable to have a varied and balanced diet based on vegetables and fruit, fish and seafood, nuts, seeds, whole-grain products, poultry, and low-fat dairy products.
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Habib SAEH, Toson EAM, Al-Mutairi FM, Al-Alawy AI, Elfaki I, El-Baz RA, Elafify ME. Effects of Trace Metals Levels and Hyaluronic Acid Degrading Enzymes Activities on Human Sperm Function. Pak J Biol Sci 2020; 22:444-451. [PMID: 31930875 DOI: 10.3923/pjbs.2019.444.451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND AND OBJECTIVE Deficiency of trace elements that are cofactors of fertilizing enzymes can cause sperm dysfunction and male infertility. In the present work, the levels of some trace metals (Cu, Zn and Mn) and the activities of hyaluronic acid degrading enzymes were evaluated in semen from fertile and infertile men. MATERIALS AND METHODS Two hundred and sixteen semen samples were divided into 5 groups: Group 1 (G1) was healthy controls and another 4 infertile group 2-5 according to WHO criteria. Levels of Cu, Zn and Mn and activities of hyaluronidase (Hase), N-acetyl-β-D-glucosaminidase (NAG) and β-D-glucuronidase (β-Gluc) were estimated in the sperms and seminal plasma of these groups. RESULTS Significant decreases in Cu2+ and Zn2+ contents were observed in seminal plasma and sperms homogenate of the infertile groups. Moreover, the activities of the 3 hyaluronic acid degrading enzymes in sperms homogenate supernatant of infertile males were highly reduced compared to the control group. The Hase activity in seminal plasma of all groups was completely absent. The activity of β-Gluc in seminal plasma of infertile males was highly elevated than control group. CONCLUSION The disturbance in levels of trace metals and the hyaluronic acid degrading enzymes activities are associated with human male infertility and may be useful tools in predicting semen quality.
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Mirnamniha M, Faroughi F, Tahmasbpour E, Ebrahimi P, Beigi Harchegani A. An overview on role of some trace elements in human reproductive health, sperm function and fertilization process. REVIEWS ON ENVIRONMENTAL HEALTH 2019; 34:339-348. [PMID: 31203261 DOI: 10.1515/reveh-2019-0008] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 04/28/2019] [Indexed: 05/28/2023]
Abstract
Human semen contains several trace elements such as calcium (Ca), copper (Cu), manganese (Mn), magnesium (Mg), zinc (Zn) and selenium (Se) which are necessary for reproductive health, normal spermatogenesis, sperm maturation, motility and capacitation, as well as normal sperm function. In this review, the potential role of these trace elements in male reproductive health, normal function of spermatozoa and fertility potency were considered. We selected and reviewed articles that considered crucial roles of trace elements in human sperm function and fertility. Ca is essential for sperm motility and its hyperactivation, sperm capacitation and acrosome reaction, as well as sperm chemotaxis. Sodium (Na) and potassium (K) are involved in sperm motility and capacitation. Mg is necessary for normal ejaculation, spermatogenesis and sperm motility. Zn is one of the most significant nutrients in human semen. Seminal deficiency of Zn can be associated with delayed testicular development, impaired spermatogenesis, deficiency of sex hormones, oxidative stress and inflammation, and apoptosis. Se is another significant element which has antioxidative properties and is essential for spermatogenesis and the maintenance of male fertility. Mn is a potent stimulator for sperm motility; however, increased level of seminal plasma Se can be toxic for sperm. Like Se, Cu has antioxidative properties and has a positive effect on sperm parameters. Decreased level of these trace elements can negatively affect human reproductive health, semen quality, sperm normal function and as the result, fertility potency in men. Measurement of these trace elements in men with idiopathic infertility is necessary.
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Affiliation(s)
- Mahdiyeh Mirnamniha
- Department of Medical Radiation Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Fereshteh Faroughi
- Department of Medical Radiation Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Eisa Tahmasbpour
- Laboratory of Regenerative Medicine and Biomedical Innovations, Pasteur Institute of Iran, Tehran, Iran
| | - Pirooz Ebrahimi
- University Scientific Education and Research Network, Tehran, Iran
| | - Asghar Beigi Harchegani
- Department of Medical Genetics, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, P.O. Box: 19945-581, Tehran, Iran
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Removal of Manganese(II) from Acid Mine Wastewater: A Review of the Challenges and Opportunities with Special Emphasis on Mn-Oxidizing Bacteria and Microalgae. WATER 2019. [DOI: 10.3390/w11122493] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Many global mining activities release large amounts of acidic mine drainage with high levels of manganese (Mn) having potentially detrimental effects on the environment. This review provides a comprehensive assessment of the main implications and challenges of Mn(II) removal from mine drainage. We first present the sources of contamination from mineral processing, as well as the adverse effects of Mn on mining ecosystems. Then the comparison of several techniques to remove Mn(II) from wastewater, as well as an assessment of the challenges associated with precipitation, adsorption, and oxidation/filtration are provided. We also critically analyze remediation options with special emphasis on Mn-oxidizing bacteria (MnOB) and microalgae. Recent literature demonstrates that MnOB can efficiently oxidize dissolved Mn(II) to Mn(III, IV) through enzymatic catalysis. Microalgae can also accelerate Mn(II) oxidation through indirect oxidation by increasing solution pH and dissolved oxygen production during its growth. Microbial oxidation and the removal of Mn(II) have been effective in treating artificial wastewater and groundwater under neutral conditions with adequate oxygen. Compared to physicochemical techniques, the bioremediation of manganese mine drainage without the addition of chemical reagents is relatively inexpensive. However, wastewater from manganese mines is acidic and has low-levels of dissolved oxygen, which inhibit the oxidizing ability of MnOB. We propose an alternative treatment for manganese mine drainage that focuses on the synergistic interactions of Mn in wastewater with co-immobilized MnOB/microalgae.
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16
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Souza TL, Batschauer AR, Brito PM, Oliveira Ribeiro CA, Martino-Andrade AJ, Ortolani-Machado CF. Multigenerational analysis of the functional status of male reproductive system in mice after exposure to realistic doses of manganese. Food Chem Toxicol 2019; 133:110763. [DOI: 10.1016/j.fct.2019.110763] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 08/09/2019] [Accepted: 08/15/2019] [Indexed: 12/16/2022]
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Liu Q, Cen C, Fu H, Wang F, Wang Y, Xu T, Hou X. Antioxidant activity of Coridius chinensis extracts on manganese-induced testicular damage in rats. ENVIRONMENTAL TOXICOLOGY 2019; 34:1067-1073. [PMID: 31141314 PMCID: PMC6771807 DOI: 10.1002/tox.22777] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 05/04/2019] [Accepted: 05/09/2019] [Indexed: 05/29/2023]
Abstract
Coridius chinensis (C. chinensis) is a traditional Chinese medicine that has been used to treat pain, erectile dysfunction, and other diseases. Our previous study demonstrated that manganese-induced reproductive damage was partially rescued by a medium dose of C. chinensis treatment in rat. However, the underlying mechanism is unknown. In this study, we found that the weight of reproductive organs and the sperm count in manganese-exposed rat were partially rescued by C. chinensis extracts (CcE) treatment. The number of apoptotic cells was significantly decreased and the expression of malondialdehyde, cytochrome c, and caspase-3 in manganese-exposed rats was significantly decreased after high dose of CcE treatment. Further studies revealed that the activity of superoxide dismutase, total antioxidant capacity, and glutathione peroxidase enzymes was significantly increased in testis tissues and serum of manganese-exposed rats with high dose of CcE treatment. Taken together, the results of this study suggest that CcE inhibits the Mn2+ -induced apoptosis in testes by inducing the activity of antioxidants.
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Affiliation(s)
- Qiongyou Liu
- Department of Basic Medical SciencesZunyi Medical UniversityZunyiChina
| | - Changhuo Cen
- Department of Basic Medical SciencesZunyi Medical UniversityZunyiChina
| | - Huihui Fu
- Department of Basic Medical SciencesZunyi Medical UniversityZunyiChina
| | - Fengyue Wang
- Department of Basic Medical SciencesZunyi Medical UniversityZunyiChina
| | - Yong Wang
- Department of Basic Medical SciencesZunyi Medical UniversityZunyiChina
| | - Tiantian Xu
- Department of Basic Medical SciencesZunyi Medical UniversityZunyiChina
| | - Xiaohui Hou
- Department of Basic Medical SciencesZunyi Medical UniversityZunyiChina
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Sachse B, Kolbaum AE, Ziegenhagen R, Andres S, Berg K, Dusemund B, Hirsch-Ernst KI, Kappenstein O, Müller F, Röhl C, Lindtner O, Lampen A, Schäfer B. Dietary Manganese Exposure in the Adult Population in Germany-What Does it Mean in Relation to Health Risks? Mol Nutr Food Res 2019; 63:e1900065. [PMID: 31216097 DOI: 10.1002/mnfr.201900065] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 04/29/2019] [Indexed: 11/10/2022]
Abstract
Manganese is both an essential nutrient and a potential neurotoxicant. Therefore, the question arises whether the dietary manganese intake in the German population is on the low or high side. Results from a pilot total diet study in Germany presented here reveal that the average dietary manganese intake in the general population in Germany aged 14-80 years is about 2.8 mg day-1 for a person of 70 kg body weight. This exposure level is within the intake range of 2-5 mg per person and day as recommended by the societies for nutrition in Germany, Austria, and Switzerland. No information on the dietary exposure of children in Germany can be provided so far. Although reliable information on health effects related to oral manganese exposure is limited, there is no indication from the literature that these dietary intake levels are associated with adverse health effects either by manganese deficiency or excess. However, there is limited evidence that manganese taken up as a highly bioavailable bolus, for example, uptake via drinking water or food supplements, could pose a potential risk to human health-particularly in certain subpopulations-when certain intake amounts, which are currently not well defined, are exceeded.
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Affiliation(s)
- Benjamin Sachse
- German Federal Institute for Risk Assessment (BfR), Department of Food Safety, 10589, Berlin, Germany
| | - Anna Elena Kolbaum
- German Federal Institute for Risk Assessment (BfR), Department of Exposure, 12277, Berlin, Germany
| | - Rainer Ziegenhagen
- German Federal Institute for Risk Assessment (BfR), Department of Food Safety, 10589, Berlin, Germany
| | - Susanne Andres
- German Federal Institute for Risk Assessment (BfR), Department of Food Safety, 10589, Berlin, Germany
| | - Katharina Berg
- German Federal Institute for Risk Assessment (BfR), Department of Exposure, 12277, Berlin, Germany
| | - Birgit Dusemund
- German Federal Institute for Risk Assessment (BfR), Department of Food Safety, 10589, Berlin, Germany
| | - Karen Ildico Hirsch-Ernst
- German Federal Institute for Risk Assessment (BfR), Department of Food Safety, 10589, Berlin, Germany
| | - Oliver Kappenstein
- German Federal Institute for Risk Assessment (BfR), Department of Chemicals and Product Safety, 10589, Berlin, Germany
| | - Frederic Müller
- German Federal Institute for Risk Assessment (BfR), Department of Chemicals and Product Safety, 10589, Berlin, Germany
| | - Claudia Röhl
- German Federal Institute for Risk Assessment (BfR), Department of Food Safety, 10589, Berlin, Germany.,State Agency for Social Services Schleswig-Holstein (LAsD), Department of Environmental Health Protection, 24105, Kiel, Germany
| | - Oliver Lindtner
- German Federal Institute for Risk Assessment (BfR), Department of Exposure, 12277, Berlin, Germany
| | - Alfonso Lampen
- German Federal Institute for Risk Assessment (BfR), Department of Food Safety, 10589, Berlin, Germany
| | - Bernd Schäfer
- German Federal Institute for Risk Assessment (BfR), Department of Food Safety, 10589, Berlin, Germany
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Wan ZZ, Chen HG, Lu WQ, Wang YX, Pan A. Metal/metalloid levels in urine and seminal plasma in relation to computer-aided sperm analysis motion parameters. CHEMOSPHERE 2019; 214:791-800. [PMID: 30296767 DOI: 10.1016/j.chemosphere.2018.10.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 09/28/2018] [Accepted: 10/01/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Exposure to high levels of metals/metalloids may impair semen quality. Computer-aided sperm analysis (CASA) can be used for kinematic analysis of spermatozoa, which provides additional insights into sperm motion characteristics. OBJECTIVE To explore the associations of urinary and seminal plasma metal/metalloid concentrations with CASA motion parameters and assess the degree of correspondence between the two sample types. METHODS Eighteen metals/metalloids in seminal plasma and repeated urine samples were determined among 746 men recruited from a reproductive center. We assessed their associations with 6 CASA motion parameters [i.e., straight-line velocity (VSL), curvilinear velocity (VCL), average path velocity (VAP), linearity (LIN), straightness (STR) and amplitude head displacement (ALH)] using multivariable linear regression models. RESULTS We found significantly inverse dose-dependent relationships between seminal plasma arsenic (As) and VSL, VCL and VAP, between seminal plasma selenium (Se) and VSL and VAP, between seminal plasma zinc (Zn) and STR and LIN, and between seminal plasma manganese (Mn) and LIN in single-metal models [all false discovery rate (FDR) adjusted P for trend < 0.05]. These dose-response relationships remained statistically significant based on multiple-metal models and restricted cubic spline functions. Metal/metalloid concentrations in urine poorly predicted the same-day seminal plasma concentrations [coefficient of determination (R2) < 0.15]. We didn't find any significant associations between urinary metal/metalloid concentrations and the CASA motion parameters. CONCLUSION Exposure to high levels of As, Se, Mn and Zn may impair sperm motion capacity. Concentrations of metals/metalloids in spot urine samples cannot accurately predict same-day seminal plasma exposure levels.
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Affiliation(s)
- Zhen-Zhen Wan
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Heng-Gui Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Wen-Qing Lu
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Yi-Xin Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China.
| | - An Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China.
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20
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Yang H, Wang J, Yang X, Wu F, Qi Z, Xu B, Liu W, Deng Y. Occupational manganese exposure, reproductive hormones, and semen quality in male workers: A cross-sectional study. Toxicol Ind Health 2018; 35:53-62. [PMID: 30466360 DOI: 10.1177/0748233718810109] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
It has been found that exposure to manganese (Mn) could induce reproductive dysfunction, but its occupational risk in male workers is unclear. This study aims to assess the association of occupational Mn exposure with reproductive hormones and semen quality in a cross-sectional study. Urinary Mn, semen quality, and reproductive hormones were explored in 84 male workers occupationally exposed to Mn and 92 referents. Multiple linear regression analyses were used to assess the relationship. Urinary Mn levels in Mn-exposed workers ranged from 0.56 to 34.25 µg/L, and the average level was 15.92 ± 8.49 µg/L. Compared with the control group, gonadotropin-releasing hormone (GnRH) levels and luteinizing hormone (LH) levels increased significantly and the levels of testosterone (TSTO) decreased significantly in the Mn-exposed group. There was a significant positive linear association between urinary Mn and GnRH and LH, while the linear association between urinary Mn and TSTO was negative. Sperm progressive motility and total motility decreased significantly in the Mn-exposed group. There was a significantly negative linear association between urinary Mn and sperm progressive motility and total motility. In conclusion, occupational Mn exposure was inversely associated with reproductive health of male workers, resulting in the abnormality of hormones secretion and decrease of sperm motility.
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Affiliation(s)
- Haibo Yang
- 1 Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Jifeng Wang
- 2 Department of Clinical Laboratory, Linyi People's Hospital, Linyi, China
| | - Xinxin Yang
- 1 Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Fengdi Wu
- 1 Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Zhipeng Qi
- 1 Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Bin Xu
- 1 Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Wei Liu
- 1 Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
| | - Yu Deng
- 1 Department of Environmental Health, School of Public Health, China Medical University, Shenyang, China
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21
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Gomes Silva AP, da Silva Araujo Santiago M, Maranho LA, de Oliveira RP, Constantino DHJ, Pereira CDS, da Silva RCB, Perobelli JE. Could male reproductive system be the main target of subchronic exposure to manganese in adult animals? Toxicology 2018; 409:1-12. [PMID: 29990519 DOI: 10.1016/j.tox.2018.07.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 06/28/2018] [Accepted: 07/05/2018] [Indexed: 01/28/2023]
Abstract
Manganese (Mn) is one of the most common chemical elements on Earth and an essential micronutrient in animal organism. However, in supraphysiological levels and long-term exposures, it is a potential toxicant. Although nervous system is the most studied in relation to Mn toxicity, other tissues can have their function impaired by Mn in high doses. The present study investigated the possible adverse effects of subchronic exposure to supraphysiologic level of Mn (5 mg/kg or 15 mg/kg, intraperitoneally) on reproductive, neurobehavioral, renal and hepatic parameters of male rats. For the first time, the vulnerability of these parameters to Mn was concomitantly investigated. While our results demonstrate that Mn treatments were not sufficient to produce a marked effect of neurotoxic, hepatotoxic or renal toxicity in adult rats, we found typical indicators of reproductive toxicity such as histopathological changes (major in testes and epididymis) and impaired sperm concentration and quality. Mn, under these experimental conditions, seems to exert reproductive toxicity by different testicular mechanisms, i.e. direct and indirect action on germ cells. On the other hand, exposure to Mn did not change the pattern of cognitive and emotional behaviors and the histological organization of kidneys of experimental rats. The liver showed a weight increasement and hidropic degeneration, probable due to the detoxification overload. In summary, for the first time it was demonstrated that adult male reproductive system was more sensitive to Mn toxicity than nervous, hepatic and renal systems, although nervous system is known as the main target tissue of this metal.
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Affiliation(s)
- Ana Priscila Gomes Silva
- Laboratório de Toxicologia Experimental-LATOEX, Departamento de Ciências do Mar, Universidade Federal de São Paulo (UNIFESP), Campus Baixada Santista, Santos, SP, Brazil.
| | - Marcella da Silva Araujo Santiago
- Laboratório de Toxicologia Experimental-LATOEX, Departamento de Ciências do Mar, Universidade Federal de São Paulo (UNIFESP), Campus Baixada Santista, Santos, SP, Brazil.
| | - Luciane Alves Maranho
- Departamento de Ciências do Mar, Universidade Federal de São Paulo (UNIFESP), Campus Baixada Santista, Santos, SP, Brazil.
| | - Rodolpho Pereira de Oliveira
- Laboratório de Psicobiologia da Esquizofrenia, Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Campus Baixada Santista, Santos, SP, Brazil.
| | | | - Camilo Dias Seabra Pereira
- Departamento de Ciências do Mar, Universidade Federal de São Paulo (UNIFESP), Campus Baixada Santista, Santos, SP, Brazil.
| | - Regina Cláudia Barbosa da Silva
- Laboratório de Psicobiologia da Esquizofrenia, Departamento de Biociências, Universidade Federal de São Paulo (UNIFESP), Campus Baixada Santista, Santos, SP, Brazil.
| | - Juliana Elaine Perobelli
- Laboratório de Toxicologia Experimental-LATOEX, Departamento de Ciências do Mar, Universidade Federal de São Paulo (UNIFESP), Campus Baixada Santista, Santos, SP, Brazil.
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Ebselen can Protect Male Reproductive Organs and Male Fertility from Manganese Toxicity: Structural and Bioanalytical Approach in a Rat Model. Biomed Pharmacother 2018; 102:739-748. [PMID: 29604593 DOI: 10.1016/j.biopha.2018.03.086] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 03/14/2018] [Accepted: 03/14/2018] [Indexed: 11/20/2022] Open
Abstract
Ebselen (EBS) is a versatile compound that can protect the cellular components from oxidative and free radical-mediated damage. In the present study, we investigated the protective effect of EBS against manganese (Mn) toxicity on male reproductive organs. Thirty-two male rats were assigned into four groups, namely, negative control, EBS (15 mg/kg body weight (bw), as a single protective IP injection), MnCl2 (50 mg/kg bw, orally for 30 consecutive days), and EBS + MnCl2 (as mentioned before). The results showed that EBS ameliorated the alterations caused by MnCl2 in the testicular, epididymal, and seminal vesicle tissues. MnCl2 increased the sperm abnormalities, decreased gonadosomatic index (GSI), sperm motility, and sperm count. Further, it reduced the serum levels of testosterone (T) and luteinizing hormone (LH). The elevated levels of malondialdehyde (MDA), nitric oxide (NO), and 8-OH-2'-deoxyguanosine (8-OHdG) and decreased the levels of superoxide dismutase (SOD), glutathione (GSH), and catalase (CAT) upon exposure to MnCl2 indicated a disturbance in the activities of the testicular antioxidant enzymes and indices. Histologically, MnCl2 decreased the diameter of seminiferous tubules (ST), the height of germinal epithelium, number of spermatogonia/ST, spermatocytes/ST, spermatids/ST, and Leydig cells/intertubular area (IA). Chemoprotection with EBS successfully mitigated most of the above-mentioned parameters concluding that EBS could be used as a useful prophylactic therapy whenever Mn toxicity is involved.
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Krajnak K, Sriram K, Johnson C, Roberts JR, Mercer R, Miller GR, Wirth O, Antonini JM. Effects of pulmonary exposure to chemically-distinct welding fumes on neuroendocrine markers of toxicity. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2017; 80:301-314. [PMID: 28598268 PMCID: PMC6422021 DOI: 10.1080/15287394.2017.1318324] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Exposure to welding fumes may result in disorders of the pulmonary, cardiovascular, and reproductive systems. Welders are also at a greater risk of developing symptoms similar to those seen in individuals with idiopathic Parkinson's disease. In welders, there are studies that suggest that alterations in circulating prolactin concentrations may be indicative of injury to the dopamine (DA) neurons in the substantia nigra. The goal of these studies was to use an established model of welding particulate exposure to mimic the effects of welding fume inhalation on reproductive functions. Since previous investigators suggested that changes in circulating prolactin may be an early marker of DA neuron injury, movement disorders, and reproductive dysfunction, prolactin, hypothalamic tyrosine hydroxylase (TH) levels (a marker of DA synthesis), and other measures of hypothalamic-pituitary-gonadal (HPG) function were measured after repetitive instillation of welding fume particulates generated by flux core arc-hard surfacing (FCA-HS), manual metal arc-hard surfacing (MMA-HS) or gas metal arc-mild steel (GMA-MS) welding, or manganese chloride (MnCl2). Exposure to welding fume particulate resulted in the accumulation of various metals in the pituitary and testes of rats, along with changes in hypothalamic TH and serum prolactin levels. Exposure to particulates with high concentrations of soluble manganese (Mn) appeared to exert the greatest influence on TH activity levels and serum prolactin concentrations. Thus, circulating prolactin levels may serve as a biomarker for welding fume/Mn-induced neurotoxicity. Other reproductive measures were collected, and these data were consistent with epidemiological findings that prolactin and testosterone may serve as biomarkers of welding particulate induced DA neuron and reproductive dysfunction.
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Affiliation(s)
- K. Krajnak
- Engineering Controls and Technology Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - K. Sriram
- Toxicology and Molecular Biology Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - C. Johnson
- Engineering Controls and Technology Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - J. R. Roberts
- Exposure Assessment Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - R. Mercer
- Physiology and Pathology Research Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - G. R. Miller
- Engineering Controls and Technology Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - O. Wirth
- Biostatistic and Epidemiology Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - J. M. Antonini
- Physiology and Pathology Research Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
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Adedara IA, Subair TI, Ego VC, Oyediran O, Farombi EO. Chemoprotective role of quercetin in manganese-induced toxicity along the brain-pituitary-testicular axis in rats. Chem Biol Interact 2016; 263:88-98. [PMID: 28040552 DOI: 10.1016/j.cbi.2016.12.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Revised: 12/09/2016] [Accepted: 12/22/2016] [Indexed: 01/06/2023]
Abstract
Reproductive dysfunction in response to manganese exposure has been reported in humans and animals. Quercetin, a bioflavonoid widely distributed in fruits, vegetables and beverages has been shown to possess antioxidant, anti-inflammatory and anti-apoptotic activities in different experimental model systems. However, there is dearth of scientific information on the influence of quercetin on manganese-induced reproductive toxicity. This study was designed to evaluate the influence of quercetin on manganese-induced functional alterations along the brain-pituitary- testicular axis in rats. Manganese was administered alone at 15 mg/kg body weight or orally co-treated with quercetin at 10 and 20 mg/kg body weight for 45 consecutive days. Results indicated that quercetin co-treatment significantly (p < 0.05) inhibited manganese-induced elevation in biomarkers of oxidative stress whereas it increased antioxidant enzymes activities and glutathione level in the brain, testes and epididymis of the treated rats. Furthermore, quercetin mediated suppression of inflammatory indices and caspase-3 activity was accompanied by preservation of histo-architectures of the brain, testes and epididymis in manganese-treated rats. The significant reversal of manganese-induced decreases in reproductive hormones (i.e. luteinizing hormone, follicle-stimulating hormone and testosterone) and testicular activities of acid phosphatase, alkaline phosphatase and lactate dehydrogenase by quercetin was complemented by an increase in sperm quality and quantity in the treated rats. Collectively, quercetin modulated manganese-induced toxicity along the brain-pituitary-testicular axis in rats via its intrinsic antioxidant, anti-inflammatory and anti-apoptotic activities, and may thus represent a potential pharmacological agent against manganese-induced male reproductive deficits in humans.
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Affiliation(s)
- Isaac A Adedara
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria.
| | - Temitayo I Subair
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Valerie C Ego
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Oluwasetemi Oyediran
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Ebenezer O Farombi
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
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Nduka JK, Onyenezi Amuka JP, Onwuka JC, Udowelle NA, Orisakwe OE. Human health risk assessment of lead, manganese and copper from scrapped car paint dust from automobile workshops in Nigeria. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:20341-20349. [PMID: 27449017 DOI: 10.1007/s11356-016-7219-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 07/08/2016] [Indexed: 06/06/2023]
Abstract
The economic downturn in Nigeria and Structural Adjustment Programme led to the flooding of Nigerian market with imported used automobiles. Most of these vehicles needed refurbishing and reworking. The present study is a human health risk assessment of metal exposure resulting from reworking of imported used vehicles in Nigeria. Scrap paint dusts from 56 Japanese made cars were collected from 8 different mechanic villages (workshops A-H] in Southeastern Nigeria. Scrap paints were homogenized, mixed, divided into fine particles and digested by standard method. The filtrates were assayed of lead, manganese and copper with atomic absorption spectrophotometry (AAS). Workshop B has the highest concentration of Pb (4.26 ± 0.93). Manganese in workshops A and F were (3.31 ± 0.85) and (3.04 ± 0.47) respectively and were higher than the levels from workshops C, B, D, G and H. Copper in workshop D (7.11 ± 0.21) was significantly greater than the other workshops. The highest hazard quotient (HQ) through ingestion, inhalation and dermal exposures in adults were 9.44E-05 (workshop B), 4.20E-01 (workshop B) and 1.08E-05 (workshop D) respectively. The highest values for HQ through ingestion, inhalation and dermal in children were 8.82E-04, 7.61E-01 and 2.86E-05 all in workshop B respectively. For children, the highest carcinogenic risk levels were 7.05E-08, 6.09E-05 and 2.29E-10 for ingestion, inhalation and dermal exposures respectively. In adults, the carcinogenic risk levels were 7.55E-09, 3.39E-05 and 8.67E-10 for ingestion, inhalation and dermal exposures respectively. Chronic exposure to scrap car paint dusts may be of significant public health importance in Nigeria as this may add to the body burden of some heavy metals.
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Affiliation(s)
- John Kanayochukwu Nduka
- Environmental Chemistry and Toxicology Research Unit, Pure and Industrial Chemistry Department, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria
- Department of Chemistry, Federal University, Lafia, Nasarawa State, Nigeria
| | - John Paul Onyenezi Amuka
- Environmental Chemistry and Toxicology Research Unit, Pure and Industrial Chemistry Department, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria
| | | | - Nnaemeka Arinze Udowelle
- Toxicology Unit, Department of Experimental Pharmacology, Faculty of Pharmacy, University of Port-Harcourt, Port-Harcourt, Nigeria
| | - Orish Ebere Orisakwe
- Toxicology Unit, Department of Experimental Pharmacology, Faculty of Pharmacy, University of Port-Harcourt, Port-Harcourt, Nigeria.
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Zhou Y, Fu XM, He DL, Zou XM, Wu CQ, Guo WZ, Feng W. Evaluation of urinary metal concentrations and sperm DNA damage in infertile men from an infertility clinic. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 45:68-73. [PMID: 27262988 DOI: 10.1016/j.etap.2016.05.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 05/19/2016] [Accepted: 05/21/2016] [Indexed: 06/05/2023]
Abstract
This study aimed to examine associations between urinary metal concentrations and sperm DNA damage. Thirteen metals [arsenic (As), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), iron (Fe), lead (Pb), manganese (Mn), molybdenum (Mo), mercury (Hg), nickel (Ni), selenium (Se), and zinc (Zn)] were detected in urine samples of 207 infertile men from an infertility clinic using inductively coupled plasma mass spectrometry, and also, sperm DNA damage (tail length, percent DNA tail, and tail distributed moment) were assessed using neutral comet assay. We found that urinary Hg and Ni were associated with increasing trends for tail length (both p for trend<0.05), and that urinary Mn was associated with increasing trend for tail distributed moment (p for trend=0.02). These associations did persist even when considering multiple metals. Our results suggest that environmental exposure to Hg, Mn, and Ni may be associated with increased sperm DNA damage.
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Affiliation(s)
- Yan Zhou
- School of Public Health, Changsha Medical University, Changsha, Hunan, PR China.
| | - Xiao-Ming Fu
- The 169th Hospital of People's Liberation Army, Xiangnan Affiliated Hospital of Hunan Normal University, Hengyang, Hunan, PR China
| | - Dong-Liang He
- Department of Preventive Medicine, School of Public Health, University of South China, Hengyang, Hunan, PR China; Department of Nutrition and Food Hygiene, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Xue-Min Zou
- School of Public Health, Changsha Medical University, Changsha, Hunan, PR China
| | - Cheng-Qiu Wu
- Department of Preventive Medicine, School of Public Health, University of South China, Hengyang, Hunan, PR China
| | - Wei-Zhen Guo
- School of Public Health, Changsha Medical University, Changsha, Hunan, PR China
| | - Wei Feng
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
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Rotter I, Kosik-Bogacka DI, Dołęgowska B, Safranow K, Kuczyńska M, Laszczyńska M. Analysis of the relationship between the blood concentration of several metals, macro- and micronutrients and endocrine disorders associated with male aging. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2016; 38:749-761. [PMID: 26254889 DOI: 10.1007/s10653-015-9758-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 07/31/2015] [Indexed: 06/04/2023]
Abstract
Beyond 30 years of age, men experience a decline in the production of testosterone, yet only a few develop late-onset hypogonadism. This study was designed to determine the relationship between blood concentrations of metals, macro- and micronutrients and age-related testosterone deficiency and associated hormonal changes in aging men. The research involved 313 men aged 50-75 years. We used ELISA to determine the concentrations of total testosterone (TT), free testosterone (FT), estradiol (E2), dehydroepiandrosterone sulfate (DHEAS) and sex hormone-binding globulin (SHBG). We calculated free androgen index (FAI). With the use of emission spectrometry in inductively coupled argon plasma, we determined the whole-blood concentrations of lead (Pb), cadmium (Cd), mercury (Hg), arsenic (As) and tungsten (W), as well as serum concentrations of magnesium (Mg), iron (Fe), calcium (Ca), copper (Cu), zinc (Zn), selenium (Se), chromium (Cr), manganese (Mn) and molybdenum (Mo). The study showed no relationship between TT and FT and the concentrations of metals. Men with TT deficiency had significantly lower concentrations of Mg and Fe and increased Mn. Men with FT deficiency had higher W and Cr levels and lower Fe. Assessing the correlation between the concentrations of hormones, SHBG and FAI, and the concentration of metals and macro- and microelements in the blood of the men, we found positive correlations between the concentrations of TT-Mg, TT-Fe, TT-Mo, FT-Fe, E2-As, SHBG-Mn, FAI-W, FAI-As, FAI-Zn and FAI-Ca, and negative correlations between the concentrations of TT-Mn, FT-Cd, FT-Cr, E2-Hg, E2-Cr, SHBG-W, SHBG-As, SHBG-Zn, SHBG-Ca, FAI-Pb and FAI-Mn. Positive correlations between As and E2 and between As and FAI may suggest a lack of association between this metal and hypogonadism in people not exposed to excess As levels. Our research indicates a positive relationship between the concentrations of Mg, Fe and Zn and endocrine system in aging men, in contrast to Mn and Cr. Toxic metals (Cd, Pb) seemed to negatively affect the level of bioavailable testosterone. In persons not exposed to As, As does not contribute late-onset hypogonadism. Heavy metals (Pb, Cd, Hg and W) may contribute to a lower concentration of DHEAS. The role of W in men with LOH was found to be ambiguous, as on the one hand its concentration was higher in men with FT deficiency, and on the other hand it positively correlated with FAI, which in turn indirectly indicates testosterone availability. Copper and selenium do not seem to play any significant role in the occurrence of TT deficiency in aging men.
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Affiliation(s)
- Iwona Rotter
- Independent Laboratory of Medical Rehabilitation, Pomeranian Medical University, Szczecin, Poland
| | - Danuta I Kosik-Bogacka
- Department of Biology and Medical Parasitology, Pomeranian Medical University, Szczecin, Poland.
| | - Barbara Dołęgowska
- Department of Microbiology and Immunology Diagnostics, Pomeranian Medical University, Szczecin, Poland
| | - Krzysztof Safranow
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Szczecin, Poland
| | - Magdalena Kuczyńska
- Department of Human Sciences in Medicine, Pomeranian Medical University, Szczecin, Poland
| | - Maria Laszczyńska
- Department of Histology and Developmental Biology, Pomeranian Medical University, Szczecin, Poland
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Gabrielsen JS, Tanrikut C. Chronic exposures and male fertility: the impacts of environment, diet, and drug use on spermatogenesis. Andrology 2016; 4:648-61. [DOI: 10.1111/andr.12198] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 03/07/2016] [Accepted: 03/10/2016] [Indexed: 01/02/2023]
Affiliation(s)
- J. S. Gabrielsen
- Department of Urology; Massachusetts General Hospital; Boston MA USA
| | - C. Tanrikut
- Department of Urology; Massachusetts General Hospital; Boston MA USA
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29
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Zeng Q, Feng W, Zhou B, Wang YX, He XS, Yang P, You L, Yue J, Li YF, Lu WQ. Urinary metal concentrations in relation to semen quality: a cross-sectional study in China. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:5052-5059. [PMID: 25827020 DOI: 10.1021/es5053478] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Exposure to metals, including essential and nonessential elements, is widespread and may be associated with altered semen quality. This study aimed to examine the association between urinary metal concentrations and semen quality in a Chinese population. We measured semen quality parameters (sperm concentration, count, motility, normal morphology, and abnormal head) and 13 metals [arsenic (As), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), iron (Fe), lead (Pb), manganese (Mn), molybdenum (Mo), mercury (Hg), nickel (Ni), selenium (Se), and zinc (Zn)] in the urine of 394 men from an infertility clinic. Multivariable logistic and linear regressions were used to assess the relationship between the creatinine-adjusted urinary metal concentrations and semen quality parameters. We found a significant trend for decreased odds ratios (ORs) for below-reference sperm count with increasing Se quartiles (p for trend = 0.04) and a significant trend for increased sperm percent abnormal head with increasing Ni quartiles (p for trend = 0.03). These associations persisted, even when considering multiple metals. Our results suggest that Ni exposure may be associated with deteriorated sperm morphology and that Se exposure may be associated with better semen quality. However, our findings warrant further studies in a larger and general population.
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Affiliation(s)
- Qiang Zeng
- †Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
- ‡Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Wei Feng
- †Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
- ‡Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Bin Zhou
- §College of Public Health, University of South China, Hengyang, Hunan 421001, PR China
| | - Yi-Xin Wang
- †Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
- ‡Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Xiao-Sheng He
- †Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
- ‡Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Pan Yang
- †Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
- ‡Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Ling You
- †Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
- ‡Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Jing Yue
- ∥Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Yu-Feng Li
- ∥Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Wen-Qing Lu
- †Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
- ‡Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
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30
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Liu XF, Zhang LM, Guan HN, Zhang ZW, Xu SW. Effects of oxidative stress on apoptosis in manganese-induced testicular toxicity in cocks. Food Chem Toxicol 2013; 60:168-76. [DOI: 10.1016/j.fct.2013.07.058] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 04/19/2013] [Accepted: 07/22/2013] [Indexed: 01/21/2023]
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31
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Gaston MA, Pellino CA, Weiss AA. Failure of manganese to protect from Shiga toxin. PLoS One 2013; 8:e69823. [PMID: 23875002 PMCID: PMC3713051 DOI: 10.1371/journal.pone.0069823] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 06/17/2013] [Indexed: 11/19/2022] Open
Abstract
Shiga toxin (Stx), the main virulence factor of Shiga toxin producing Escherichia coli, is a major public health threat, causing hemorrhagic colitis and hemolytic uremic syndrome. Currently, there are no approved therapeutics for these infections; however manganese has been reported to provide protection from the Stx1 variant isolated from Shigella dysenteriae (Stx1-S) both in vitro and in vivo. We investigated the efficacy of manganese protection from Stx1-S and the more potent Stx2a isoform, using experimental systems well-established for studying Stx: in vitro responses of Vero monkey kidney cells, and in vivo toxicity to CD-1 outbred mice. Manganese treatment at the reported therapeutic concentration was toxic to Vero cells in culture and to CD-1 mice. At lower manganese concentrations that were better tolerated, we observed no protection from Stx1-S or Stx2a toxicity. The ability of manganese to prevent the effects of Stx may be particular to certain cell lines, mouse strains, or may only be manifested at high, potentially toxic manganese concentrations.
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Affiliation(s)
- Marsha A. Gaston
- Department of Molecular Genetics, Biochemistry, and Microbiology, College of Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Christine A. Pellino
- Department of Molecular Genetics, Biochemistry, and Microbiology, College of Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Alison A. Weiss
- Department of Molecular Genetics, Biochemistry, and Microbiology, College of Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
- * E-mail:
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Liu XF, Zhang LM, Zhang Z, Liu N, Xu SW, Lin HJ. Manganese-induced effects on testicular trace element levels and crucial hormonal parameters of Hyline cocks. Biol Trace Elem Res 2013. [PMID: 23192844 DOI: 10.1007/s12011-012-9549-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Manganese (Mn) is an essential element required for normal development and reproduction. However, little is known about the reproductive toxicity of Mn in birds. To investigate the Mn-induced toxicity on testicular trace element levels and crucial hormonal parameters on male reproduction in birds, 50-day-old male Hyline cocks were fed either a commercial diet or a Mn-supplemented diet. The changes in contents of copper (Cu), iron (Fe), zinc (Zn), and calcium (Ca) in testis were detected. Hormonal parameters were evaluated including the levels of testosterone (T), luteinizing hormone (LH), follicle-stimulating hormone (FSH), thyroid-stimulating hormone (TSH), triiodothyronine (T3), and thyroxine (T4) in the serum. The mRNA levels of luteinizing hormone receptor (LHR) and follicle-stimulating hormone receptor (FSHR) were determined in this study. The results showed that Mn was accumulated in testis, and the content of Cu, Fe, Zn, and Ca decreased. Exposure to Mn significantly lowered the content of T, LH, FSH, and the mRNA expression levels of LHR and FSHR. Levels of T3 and T4 appeared with a decreased tendency, and TSH presented no obvious regularity. It indicated that Mn exposure resulted in the disbalance of testicular trace elements and influenced hormone levels in the molecular level, which may be possible underlying reproductive toxicity mechanism induced by Mn.
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Affiliation(s)
- Xiao-fei Liu
- Key Laboratory for Food Science and Engineering, Harbin University of Commerce, Harbin, People's Republic of China
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Abstract
A combination of genetic, environmental and lifestyle factors contributes to adverse effects on the reproductive health in men. Metals are pervasive in food, water, air, tobacco smoke, and alcoholic beverages. Experimental studies suggest that many metals have adverse effects on the male reproductive function. However, information about reproductive effects of human exposure to metals is scarce and/or inconsistent. This review summarises the information from epidemiological studies of the effects of metal exposure on reproductive function in men. Factors capable of affecting these relationships were identified and discussed. A particular attention is given to the studies considering influence of concomitant exposure to various metals. These studies have generally confirmed that even moderate- to low-level exposure to lead affects certain reproductive parameters, and that exposure to cadmium affects the prostate function and serum testosterone levels. Adverse effects of mercury, manganese, chromium and arsenic on semen quality and altered serum hormone are less well documented. There is no clear evidence that boron exposure may impair reproductive health in men. Only a few studies have investigated reproductive effects of concomitant exposure to several metals and controlled for potential confounders. Future studies should consider the contribution of combined exposure to various metals and/or other factors that may influence individual susceptibility to reproductive health impairment in men.
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Li Y, Wu J, Zhou W, Gao E. Effects of manganese on routine semen quality parameters: results from a population-based study in China. BMC Public Health 2012; 12:919. [PMID: 23107312 PMCID: PMC3505748 DOI: 10.1186/1471-2458-12-919] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 10/27/2012] [Indexed: 12/01/2022] Open
Abstract
Background Manganese (Mn) is an essential element in humans but its effect on semen quality is unclear. This study therefore aimed to assess the effects of Mn on semen quality in healthy men with no occupational exposure to Mn. Methods Semen samples were obtained from healthy Chinese men 20–59 years old who were recruited from six provinces in China. Individuals with urogenital tract diseases, tuberculosis, or occupational exposure to heavy metals were excluded. A questionnaire survey was conducted, and the external genitalia, semen quality, and serum Mn levels were examined. Results A total of 1,179 volunteers were enrolled in this study. The median serum Mn concentration was 8.2 μg/L (25th percentile (P25)=3.7 μg/L, P75=16.2μg/L). After adjusted area (six provinces), abstinence interval, season, registered residence, age of subjects, education level, income, smoking, and drinking, the risk of teratospermia was increased at serum Mn concentrations >19.40 μg/L (P80) group, with an adjusted odds ratio of 2.27 (95% confidence interval: 1.18–4.37). Conclusion High serum Mn levels appeared to have harmful effects on sperm morphology and motility among healthy men with no occupational exposure to Mn.
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Affiliation(s)
- Yuyan Li
- Shanghai Institute of Planned Parenthood Research, Shanghai/WHO Collaborating Center on Human Research on Reproductive Health, 2140 Xietu Road, Shanghai 200032, China
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35
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Sengupta P. Environmental and occupational exposure of metals and their role in male reproductive functions. Drug Chem Toxicol 2012; 36:353-68. [DOI: 10.3109/01480545.2012.710631] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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36
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Li P, Zhong Y, Jiang X, Wang C, Zuo Z, Sha A. Seminal plasma metals concentration with respect to semen quality. Biol Trace Elem Res 2012; 148:1-6. [PMID: 22322880 DOI: 10.1007/s12011-012-9335-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Accepted: 01/12/2012] [Indexed: 10/14/2022]
Abstract
The aim of the current study was to assess relationships between multiple metals burden in human seminal plasma and semen quality parameters. Levels of five metals (lead, manganese, copper, arsenic, and selenium) in human seminal plasma were determined by inductively coupled plasma mass spectrometry (ICP-MS), and the correlations between the metal concentrations and semen parameters (sperm concentration, sperm motility rate, and sperm morphology) were analyzed. The activities of acid phosphatase (ACP) and of α-glucosidase in human seminal plasma were also determined. Of the 100 subjects, 21 had fertility problems according to the World Health Organization criteria and were designated as "abnormal group." Significant inverse correlations were found between the concentrations of Cu, As, Pb, and the sperm concentrations (r (Cu) = -0.312, P (Cu) = 0.029; r (As) = -0.328, P (As) = 0.021; r (Pb) = -0.377, P (Pb) = 0.008). Moreover, the Cu, Mn, and Se concentrations were significantly higher in the abnormal group than that in the normal group (P (Cu) = 0.024, P (Mn) = 0.002, P (Se) = 0.002). The ACP activity was significantly higher in the normal group than that in the abnormal group (P = 0.021). We also found a significantly negative correlation between α-glucosidase activity and the levels of As (r = -0.367, P = 0.023). These findings provide evidence for relationships between human semen quality and metal exposures. These relationships are consistent with animal data, but additional human and mechanistic studies are needed.
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Affiliation(s)
- Ping Li
- The Reproductive Medicine Center, 174th Hospital of PLA, Xiamen, China
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37
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Vandenberg LN, Colborn T, Hayes TB, Heindel JJ, Jacobs DR, Lee DH, Shioda T, Soto AM, vom Saal FS, Welshons WV, Zoeller RT, Myers JP. Hormones and endocrine-disrupting chemicals: low-dose effects and nonmonotonic dose responses. Endocr Rev 2012; 33:378-455. [PMID: 22419778 PMCID: PMC3365860 DOI: 10.1210/er.2011-1050] [Citation(s) in RCA: 1975] [Impact Index Per Article: 164.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Accepted: 02/07/2012] [Indexed: 02/08/2023]
Abstract
For decades, studies of endocrine-disrupting chemicals (EDCs) have challenged traditional concepts in toxicology, in particular the dogma of "the dose makes the poison," because EDCs can have effects at low doses that are not predicted by effects at higher doses. Here, we review two major concepts in EDC studies: low dose and nonmonotonicity. Low-dose effects were defined by the National Toxicology Program as those that occur in the range of human exposures or effects observed at doses below those used for traditional toxicological studies. We review the mechanistic data for low-dose effects and use a weight-of-evidence approach to analyze five examples from the EDC literature. Additionally, we explore nonmonotonic dose-response curves, defined as a nonlinear relationship between dose and effect where the slope of the curve changes sign somewhere within the range of doses examined. We provide a detailed discussion of the mechanisms responsible for generating these phenomena, plus hundreds of examples from the cell culture, animal, and epidemiology literature. We illustrate that nonmonotonic responses and low-dose effects are remarkably common in studies of natural hormones and EDCs. Whether low doses of EDCs influence certain human disorders is no longer conjecture, because epidemiological studies show that environmental exposures to EDCs are associated with human diseases and disabilities. We conclude that when nonmonotonic dose-response curves occur, the effects of low doses cannot be predicted by the effects observed at high doses. Thus, fundamental changes in chemical testing and safety determination are needed to protect human health.
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Affiliation(s)
- Laura N Vandenberg
- Tufts University, Center for Regenerative and Developmental Biology, Department of Biology, 200 Boston Avenue, Suite 4600, Medford, Massachusetts 02155, USA.
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Sakhaee E, Emadi L, Abshenas J, Kheirandish R, Azari O, Amiri E. Evaluation of epididymal sperm quality following experimentally induced copper poisoning in male rats. Andrologia 2011; 44 Suppl 1:110-6. [DOI: 10.1111/j.1439-0272.2010.01147.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Wirth JJ, Mijal RS. Adverse Effects of Low Level Heavy Metal Exposure on Male Reproductive Function. Syst Biol Reprod Med 2010; 56:147-67. [DOI: 10.3109/19396360903582216] [Citation(s) in RCA: 163] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Meeker JD, Rossano MG, Protas B, Padmanahban V, Diamond MP, Puscheck E, Daly D, Paneth N, Wirth JJ. Environmental exposure to metals and male reproductive hormones: circulating testosterone is inversely associated with blood molybdenum. Fertil Steril 2010; 93:130-40. [PMID: 18990371 PMCID: PMC2823119 DOI: 10.1016/j.fertnstert.2008.09.044] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2008] [Revised: 09/04/2008] [Accepted: 09/09/2008] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To explore associations between exposure to metals and male reproductive hormone levels. DESIGN Cross-sectional epidemiology study with adjustment for potential confounders. SETTING University Medical Center. PATIENT(S) Men recruited through two infertility clinics in Michigan. INTERVENTION(S) Metal concentrations and reproductive hormone levels were measured in blood samples collected from 219 men. MAIN OUTCOME MEASURE(S) Serum FSH, LH, inhibin B, T, and sex hormone-binding globulin levels. RESULT(S) Cadmium, copper, and lead were all significantly or suggestively positively associated with T when modeled individually, findings that are consistent with limited previous human and animal studies. Conversely, molybdenum was associated with reduced T. A significant inverse trend between molybdenum and T remained when additionally considering other metals in the model, and a positive association between T and zinc was also found. Finally, in exploratory analysis there was evidence for an interaction between molybdenum and zinc, whereby high molybdenum was associated with a 37% reduction in T (relative to the population median level) among men with low zinc. CONCLUSION(S) Although reductions in T and reproductive toxicity after molybdenum exposure have been previously demonstrated in animal studies, more research is needed to determine whether molybdenum poses a risk to human reproductive health.
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Affiliation(s)
- John D Meeker
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan 48109, USA.
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Meeker JD, Rossano MG, Protas B, Diamond MP, Puscheck E, Daly D, Paneth N, Wirth JJ. Multiple metals predict prolactin and thyrotropin (TSH) levels in men. ENVIRONMENTAL RESEARCH 2009; 109:869-873. [PMID: 19595304 PMCID: PMC2743774 DOI: 10.1016/j.envres.2009.06.004] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2008] [Revised: 04/28/2009] [Accepted: 06/17/2009] [Indexed: 05/27/2023]
Abstract
Exposure to a number of metals can affect neuroendocrine and thyroid signaling, which can result in adverse effects on development, behavior, metabolism, reproduction, and other functions. The present study assessed the relationship between metal concentrations in blood and serum prolactin (PRL) and thyrotropin (TSH) levels, markers of dopaminergic, and thyroid function, respectively, among men participating in a study of environmental influences on male reproductive health. Blood samples from 219 men were analyzed for concentrations of 11 metals and serum levels of PRL and TSH. In multiple linear regression models adjusted for age, BMI and smoking, PRL was inversely associated with arsenic, cadmium, copper, lead, manganese, molybdenum, and zinc, but positively associated with chromium. Several of these associations (Cd, Pb, Mo) are consistent with limited studies in humans or animals, and a number of the relationships (Cr, Cu, Pb, Mo) remained when additionally considering multiple metals in the model. Lead and copper were associated with non-monotonic decrease in TSH, while arsenic was associated with a dose-dependent increase in TSH. For arsenic these findings were consistent with recent experimental studies where arsenic inhibited enzymes involved in thyroid hormone synthesis and signaling. More research is needed for a better understanding of the role of metals in neuroendocrine and thyroid function and related health implications.
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Affiliation(s)
- John D Meeker
- Department of Environmental Health Sciences, University of Michigan School of Public Health, 6635 SPH Tower, 109 S. Observatory St., Ann Arbor, MI 48109, USA.
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Ramamoorthi RV, Rossano MG, Paneth N, Gardiner JC, Diamond MP, Puscheck E, Daly DC, Potter RC, Wirth JJ. An application of multivariate ranks to assess effects from combining factors: metal exposures and semen analysis outcomes. Stat Med 2008; 27:3503-14. [PMID: 18314933 DOI: 10.1002/sim.3236] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In studies of environmental effects on human health outcomes, it is often difficult to assess the effects of a group of exposure variables when the individual exposures do not appear to have statistically significant effects. To address this situation, we propose a method of U-scores applied to subsets of multivariate data. We illustrate the usefulness of this approach by applying it to data collected as part of a study on the effects of metal exposure on human semen parameters. In this analysis, profiles (pairs) of metals containing copper and/or manganese were negatively correlated with total motile sperm and profiles containing copper were negatively correlated with sperm morphology; profiles containing selenium and chromium were positively correlated with total motile sperm.
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Affiliation(s)
- R V Ramamoorthi
- Department of Statistics and Probability, Michigan State University, East Lansing, MI 48824, USA
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Meeker JD, Rossano MG, Protas B, Diamond MP, Puscheck E, Daly D, Paneth N, Wirth JJ. Cadmium, lead, and other metals in relation to semen quality: human evidence for molybdenum as a male reproductive toxicant. ENVIRONMENTAL HEALTH PERSPECTIVES 2008; 116:1473-9. [PMID: 19057699 PMCID: PMC2592266 DOI: 10.1289/ehp.11490] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2008] [Accepted: 07/01/2008] [Indexed: 05/03/2023]
Abstract
BACKGROUND Evidence on human semen quality as it relates to exposure to various metals, both essential (e.g., zinc, copper) and nonessential (e.g., cadmium, lead), is inconsistent. Most studies to date used small sample sizes and were unable to account for important covariates. OBJECTIVES Our goal in this study was to assess relationships between exposure to multiple metals at environmental levels and human semen-quality parameters. METHODS We measured semen quality and metals in blood (arsenic, Cd, chromium, Cu, Pb, manganese, mercury, molybdenum, selenium, and Zn) among 219 men recruited through two infertility clinics. We used multiple statistical approaches to assess relationships between metals and semen quality while accounting for important covariates and various metals. RESULTS Among a number of notable findings, the associations involving Mo were the most consistent over the various statistical approaches. We found dose-dependent trends between Mo and declined sperm concentration and normal morphology, even when considering potential confounders and other metals. For example, adjusted odds ratios (ORs) for below-reference semen-quality parameters in the low, medium, and high Mo groups were 1.0 (reference), 1.4 [95% confidence interval (CI), 0.5-3.7], and 3.5 (95% CI, 1.1-11) for sperm concentration and 1.0 (reference), 0.8 (95% CI, 0.3-1.9), and 2.6 (95% CI, 1.0-7.0) for morphology. We also found preliminary evidence for interactions between Mo and low Cu or Zn. In stratified analyses, the adjusted ORs in the high Mo/low Cu group were 14.4 (1.6, 132) and 13.7 (1.6, 114) for below-reference sperm concentration and morphology, respectively. CONCLUSIONS Our findings represent the first human evidence for an inverse association between Mo and semen quality. These relationships are consistent with animal data, but additional human and mechanistic studies are needed.
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Affiliation(s)
- John D Meeker
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan, USA.
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Current World Literature. Curr Opin Obstet Gynecol 2008; 20:320-3. [DOI: 10.1097/gco.0b013e328304362f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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