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Cao Y, Xu J, Liu J, Liang Y, Ao F, Wang S, Wei Z, Wang L. Bisphenol A exposure decreases sperm production and male fertility through inhibition PCBP2 expression. Environ Sci Pollut Res Int 2023; 30:123309-123323. [PMID: 37985585 DOI: 10.1007/s11356-023-30815-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 10/29/2023] [Indexed: 11/22/2023]
Abstract
Growing evidence suggests that the exposure of bisphenol A (BPA), an endocrine disruptor that commonly present in the environment, can impair reproduction. However, conflicting results have been reported, and the underlying mechanism has not been fully understood. In this study, 3-week-old male mice were oral exposed to 50 mg/kg/d BPA or equivalent corn oil for 28 days. Their testis and epididymis were then collected for morphology examination by HE stains. The number of sperm was counted, and the morphology was analyzed by PNA (peptide nucleic acid) and pap staining. Fertilization capacity and successful rate were analyzed after mating with wide-type females. Spermatid DNA damage and apoptosis were evaluated by DFI, γH2AX stain, and TUNEL assay. RNA sequencing analysis was conducted to identify differentially expressed genes in testicular tissue of mice exposed to BPA. RNA interference was used to verify the regulatory mechanism of BPA exposure on gene expression in GC-2 cells. Our data showed that the total number of sperm was decreased and the morphology was impaired in BPA-exposed mice. In addition, the serum testosterone level and fertilization efficiency were also reduced. Mechanism studies showed that BPA could suppress the expression of PCBP2, a key regulatory gene in spermatid development, by activating the EZH2/H3K27me3. In conclusion, we found that BPA exposure can impair spermatid development via affecting key gene expression that is at least partially due to epigenetic modification.
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Affiliation(s)
- Yuming Cao
- Department of Obstetrics and Gynecology, Perinatal Medical Center, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52 Meihua East Road, Zhuhai, Guangdong, People's Republic of China
| | - Jinfeng Xu
- Department of Obstetrics and Gynecology, Perinatal Medical Center, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52 Meihua East Road, Zhuhai, Guangdong, People's Republic of China
| | - Jie Liu
- Department of Obstetrics and Gynecology, Perinatal Medical Center, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52 Meihua East Road, Zhuhai, Guangdong, People's Republic of China
| | - Yan Liang
- Department of Obstetrics and Gynecology, Perinatal Medical Center, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52 Meihua East Road, Zhuhai, Guangdong, People's Republic of China
| | - Fei Ao
- Department of Obstetrics and Gynecology, Perinatal Medical Center, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52 Meihua East Road, Zhuhai, Guangdong, People's Republic of China
| | - Shengnan Wang
- Department of Obstetrics and Gynecology, Perinatal Medical Center, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52 Meihua East Road, Zhuhai, Guangdong, People's Republic of China
| | - Zexiao Wei
- Department of Obstetrics and Gynecology, Perinatal Medical Center, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52 Meihua East Road, Zhuhai, Guangdong, People's Republic of China
| | - Li Wang
- Department of Obstetrics and Gynecology, Perinatal Medical Center, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52 Meihua East Road, Zhuhai, Guangdong, People's Republic of China.
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Huang J, Liao L, Wang G, Du Z, Wu Z. Reproductive toxicity of enrofloxacin in Caenorhabditis elegans involves oxidative stress-induced cell apoptosis. J Environ Sci (China) 2023; 127:726-737. [PMID: 36522101 DOI: 10.1016/j.jes.2022.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 07/01/2022] [Accepted: 07/04/2022] [Indexed: 06/17/2023]
Abstract
Fluoroquinolone antibiotics (FQs) that persist and bioaccumulate in the environment have aroused people's great concern. Here, we studied the adverse effects of FQs in soil animals of Caenorhabditis elegans via food-chronically exposure. The result shows C. elegans exposed to FQs exhibited reproductive toxicity with small-brood size and low-egg hatchability. To study the underlying mechanism, we conduct a deep investigation of enrofloxacin (ENR), one of the most frequently detected FQs, on nematodes which is one of commonly used animal indicator of soil sustainability. The concentration-effect curves simulated by the Hill model showed that the half effect concentrations (EC50) of ENR were (494.3 ± 272.9) µmol/kg and (107.4 ± 30.9) µmol/kg for the brood size and the hatchability, respectively. Differential gene expression between the control and the ENR-exposure group enriched with the oxidative stress and cell apoptosis pathways. The results together with the enzyme activity in oxidative stress and the cell corpses suggested that ENR-induced reproductive toxicity was related to germ cell apoptosis under oxidative stress. The risk quotients of some soil and livestock samples were calculated based on the threshold value of EC10 for the egg hatchability (2.65 µmol/kg). The results indicated that there was possible reproductive toxicity on the nematodes in certain agricultural soils for the FQs. This study suggested that chronic exposure to FQs at certain levels in environment would induce reproductive toxicity to the nematodes and might reduce the soil sustainability, alarming the environment risks of antibiotics abuse.
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Affiliation(s)
- Jiahao Huang
- Key Laboratory of Molecular Biophysics, Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Lizi Liao
- School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Guowei Wang
- School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, China; Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan 430205, China.
| | - Zhongkun Du
- College of Resources and Environment, Shandong Agricultural University, Taian 271018, China
| | - Zhengxing Wu
- Key Laboratory of Molecular Biophysics, Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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Al-Saleh F, Khashab F, Fadel F, Al-Kandari N, Al-Maghrebi M. Inhibition of NADPH oxidase alleviates germ cell apoptosis and ER stress during testicular ischemia reperfusion injury. Saudi J Biol Sci 2020; 27:2174-2184. [PMID: 32714044 PMCID: PMC7376125 DOI: 10.1016/j.sjbs.2020.04.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/26/2020] [Accepted: 04/13/2020] [Indexed: 12/18/2022] Open
Abstract
Testicular torsion and detorsion (TTD) is a serious urological condition affecting young males that is underlined by an ischemia reperfusion injury (tIRI) to the testis as the pathophysiological mechanism. During tIRI, uncontrolled production of oxygen reactive species (ROS) causes DNA damage leading to germ cell apoptosis (GCA). The aim of the study is to explore whether inhibition of NADPH oxidase (NOX), a major source of intracellular ROS, will prevent tIRI-induced GCA and its association with endoplasmic reticulum (ER) stress. Sprague-Dawley rats (n = 36) were divided into three groups: sham, tIRI only and tIRI treated with apocynin (a NOX inhibitor). Rats undergoing tIRI endured an ischemic injury for 1 h followed by 4 h of reperfusion. Spermatogenic damage was evaluated histologically, while cellular damages were assessed using real time PCR, immunofluorescence staining, Western blot and biochemical assays. Disrupted spermatogenesis was associated with increased lipid and protein peroxidation and decreased antioxidant activity of the enzyme superoxide dismutase (SOD) as a result of tIRI. In addition, increased DNA double strand breaks and formation of 8-OHdG adducts associated with increased phosphorylation of the DNA damage response (DDR) protein H2AX. The ASK1/JNK apoptosis signaling pathway was also activated in response to tIRI. Finally, increased immuno-expression of the unfolded protein response (UPR) downstream targets: GRP78, eIF2-α1, CHOP and caspase 12 supported the presence of ER stress. Inhibition of NOX by apocynin protected against tIRI-induced GCA and ER stress. In conclusion, NOX inhibition minimized tIRI-induced intracellular oxidative damages leading to GCA and ER stress.
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Key Words
- 8-OHdG, 8-hydroxy-2′-deoxyguanosine
- ANOVA, analysis of variance
- ASK1, apoptosis signaling kinase 1
- ATF, activating transcription factor
- ATM, ataxia telangiectasia mutated
- BSA, bovine serum albumin
- BTB, blood-testis barrier
- CHOP, CCAAT-enhancer-binding protein homologous protein
- Chk, checkpoint kinase
- DAPI, diamidino phenylindole
- DDR, DNA damage response
- DMSO, dimethyl sulfoxide
- DNA, deoxyribonucleic acid
- ECL, electrochemiluminescence
- ELISA, enzyme-linked immunosorbent assay
- ER stress
- ER, endoplasmic reticulum
- GCA, germ cell apoptosis
- GRP78, glucose-related protein 78
- Germ cell apoptosis
- H&E, hematoxylin and eosin
- H2AX, histone variant
- H2O2, hydrogen peroxide
- IAP, inhibitors of apoptosis
- IF, immunofluorescence
- IRE1, inositol requiring kinase 1
- JNK, c-Jun N-terminal Kinase
- MDA, malondialdehyde
- NADP, nicotinamide adenine dinucleotide phosphate
- NADPH oxidase
- NOX, NADPH oxidase
- O2, molecular oxygen
- O2−, superoxide anion
- OS, oxidative stress
- Oxidative stress
- PARP, poly ADP-ribose polymerase
- PCC, protein carbonyl content
- PCR, polymerase chain reaction
- PERK, pancreatic ER kinase
- PVDF, polyvinylidene difluoride
- RIPA, radioimmunoprecipitation assay
- RNA, ribonucleic acid
- ROS, reactive oxygen species
- RT, reverse transcription
- SD, standard deviation
- SDS-PAGE, sodium dodecyl sulfate polyacrylamide gel electrophoresis
- SOD, superoxide dismutase
- ST, seminiferous tubule
- TOS, testicular oxidative stress
- TRAF-2, tumor-necrosis-factor receptor-associated factor 2
- TUNEL, terminal deoxynucleotidyl transferase dUTP nick end labeling
- Testicular ischemia Reperfusion Injury
- UPR, unfolded protein response
- cDNA, complementary DNA
- eIF2α1, eukaryotic initiation factor 2α1
- gDNA, genomic DNA
- i.p., intraperitoneal
- kDa, kilodalton
- mRNA, messenger ribonucleic acid
- p-, phosphorylated
- phox, phagocyte oxidase
- γ-H2AX, 139 serine-phosphorylated histone variant
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Affiliation(s)
- Farah Al-Saleh
- Department of Biochemistry, Faculty of Medicine, Kuwait University, Jabriyah, Kuwait
| | - Farah Khashab
- Department of Biochemistry, Faculty of Medicine, Kuwait University, Jabriyah, Kuwait
| | - Fatemah Fadel
- Department of Biochemistry, Faculty of Medicine, Kuwait University, Jabriyah, Kuwait
| | - Nora Al-Kandari
- Department of Biochemistry, Faculty of Medicine, Kuwait University, Jabriyah, Kuwait
| | - May Al-Maghrebi
- Department of Biochemistry, Faculty of Medicine, Kuwait University, Jabriyah, Kuwait
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Al-Maghrebi M, Alnajem AS, Esmaeil A. Epigallocatechin-3-gallate modulates germ cell apoptosis through the SAFE/Nrf2 signaling pathway. Naunyn Schmiedebergs Arch Pharmacol 2020; 393:663-71. [PMID: 31807839 DOI: 10.1007/s00210-019-01776-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Accepted: 11/12/2019] [Indexed: 01/10/2023]
Abstract
To examine the role of the transcription factor nuclear factor-erythroid 2 (NF-E2)-related factor 2 (Nrf2) and the SAFE pathway (JAK/STAT) in the induction of germ cell apoptosis (GCA) and the protective role of epigallocatechin-3-gallate (EGCG) during testicular ischemia reperfusion injury (tIRI). Male Sprague-Dawley rats (n = 18) were divided into three groups: sham, unilateral tIRI, tIRI + epigallocatechin-3-gallate (EGCG, 50 mg/Kg). Unilateral tIRI was induced by 1-h ischemia followed by 4-h reperfusion, and EGCG was injected i.p. 30-min post ischemia. Immuno-histological analyses were used to detect spermatogenesis, oxidative DNA damage, and the immuno-expression of the JAK2, STAT3, and STAT1. Biochemical assays were used to investigate the oxidative, apoptosis proteins and enzymes, while Western blot was used to detect the expression of NOX and Nrf2. Expression of apoptosis-related genes was measured by real-time PCR. During tIRI, there was a clear damage to spermatogenesis associated with decreased activities of SOD, CAT, and GPx and increased levels of lipid peroxidation and oxidative DNA damage. In addition, GCA was indicated by the activation of caspase1, PARP, decreased gene expression of survivin and increased Bax to Bcl2 ratio. In contrast to lowered Nrf2 levels, NOX levels were augmented and phosphorylation of JAK2, STAT3, and STAT1 was increased. Pre-perfusion treatment with EGCG prevented the above modulations. The coordinated activation of the SAFE pathway and suppression of Nrf2 contribute to the tIRI-induced oxidative damages and GCA, which were modulated by EGCG.
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Wang M, Nie Y, Liu Y, Dai H, Wang J, Si B, Yang Z, Cheng L, Liu Y, Chen S, Xu A. Transgenerational effects of diesel particulate matter on Caenorhabditis elegans through maternal and multigenerational exposure. Ecotoxicol Environ Saf 2019; 170:635-643. [PMID: 30579164 DOI: 10.1016/j.ecoenv.2018.12.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 12/07/2018] [Accepted: 12/11/2018] [Indexed: 06/09/2023]
Abstract
Diesel particulate matter (DPM) is a dominant contaminant in fine particulate matters (PM2.5) and has been proved to induce serious harmful effects to human beings, including lung cancer, allergic, and chronic bronchitis. However, little attention has been paid to understand the transgenerational effects of DPM. In the present study, we focused on the transgenerational effects of DPM in the model organism Caenorhabditis elegans (C. elegans) exposed in either maternal generation (F0) or consecutive generations (F0-F5). In maternal exposure manner, 0.1 and 1.0 µg/mL DPM significantly increased the germ cell apoptosis at F0 generation, while the number of apoptotic germ cells at F1-F5 generation were gradually recovered back to control level. The brood size were significantly reduced by DPM at F2 generation and recovered to control level at F3-F5 generations. In continuous exposure manner, although 0.1 and 1.0 µg/mL DPM induced significant germ cell apoptosis in F0 generation, there was no difference between F0 and other generations. Continuous exposure to DPM at 0.1 and 1.0 µg/mL impaired the brood size in F2 to F5 generations. Using a series of loss-of-function mutant strains, we found that cep-1 (w40), hus-1 (op241), and mitogen-activated protein kinase (MAPK) related signaling pathway genes were involved in DPM-induced apoptosis. Our results clearly demonstrated that the adverse effects of DPM could be passed on through long-term multigenerational exposure and DNA damage checkpoint genes and MAPK signal pathway played an essential role in response to DPM induced development and reproduction toxicity.
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Affiliation(s)
- Mudi Wang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Yaguang Nie
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, PR China
| | - Ying Liu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Hui Dai
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Jingjing Wang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Bo Si
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Zhen Yang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Lei Cheng
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Yun Liu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Shaopeng Chen
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - An Xu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, PR China.
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You X, Xi J, Liu W, Cao Y, Tang W, Zhang X, Yu Y, Luan Y. 2,2',4,4'-tetrabromodiphenyl ether induces germ cell apoptosis through oxidative stress by a MAPK-mediated p53-independent pathway. Environ Pollut 2018; 242:887-893. [PMID: 30041162 DOI: 10.1016/j.envpol.2018.07.056] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 07/09/2018] [Accepted: 07/13/2018] [Indexed: 06/08/2023]
Abstract
2,2',4,4'-Tetrabromodiphenyl ether (BDE-47), a representative congener of polybrominated diphenyl ethers in the environment, is known to have reproductive toxicity. However, the underlying mechanisms remain to be clarified, especially in in vivo systems. In the present study, we employed Caenorhabditis elegans to study the effects of BDE-47 on reproduction. Our results showed that BDE-47 impaired worm fecundity and induced germ cell apoptosis. To elucidate the mechanisms, DNA damage and oxidative stress induction were investigated by determining the numbers of foci formation in transgenic worms expressing HUS-1::GFP and the levels of reactive oxygen species, respectively. We found that BDE-47 induced oxidative stress but not DNA damage, and treatment with the antioxidant, N-acetyl-L-cysteine, completely abrogated BDE-47-induced germ cell apoptosis. In addition, the apoptosis was blocked in mutants carrying mek-1, sek-1 or abl-1 loss-of-function alleles, but not in the p53/cep-1 deficient worms, suggesting that the mitogen-activated protein kinase (MAPK) signaling cascade was essential for BDE-47-induced germ cell apoptosis and p53/cep-1 was not required. Moreover, the apoptosis in the strains deficient for DNA damage response was not suppressed under BDE-47 treatment. Overall, we demonstrated that BDE-47 could induce oxidative stress and subsequent germ cell apoptosis in Caenorhabditis elegans through a MAPK-mediated p53-independent pathway.
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Affiliation(s)
- Xinyue You
- Hongqiao International Institute of Medicine, Shanghai Tong Ren Hospital and Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Jing Xi
- Hongqiao International Institute of Medicine, Shanghai Tong Ren Hospital and Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Weiying Liu
- Hongqiao International Institute of Medicine, Shanghai Tong Ren Hospital and Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Yiyi Cao
- Hongqiao International Institute of Medicine, Shanghai Tong Ren Hospital and Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Weifeng Tang
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
| | - Xinyu Zhang
- Hongqiao International Institute of Medicine, Shanghai Tong Ren Hospital and Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Yingxin Yu
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangdong, 510006, China.
| | - Yang Luan
- Hongqiao International Institute of Medicine, Shanghai Tong Ren Hospital and Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
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Luo X, Xu S, Yang Y, Zhang Y, Wang S, Chen S, Xu A, Wu L. A novel method for assessing the toxicity of silver nanoparticles in Caenorhabditis elegans. Chemosphere 2017; 168:648-657. [PMID: 27836269 DOI: 10.1016/j.chemosphere.2016.11.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 10/30/2016] [Accepted: 11/02/2016] [Indexed: 06/06/2023]
Abstract
At present, nanotechnology has been producing nanoscale materials with unprecedented speed. Nanomaterials could be inevitably released into the environment owing to their widespread use, and their potential toxicity has caused a great concern. With regard to assessment of nanomaterial toxicity, many studies probably don't truly reflect their toxicity, because the nanoparticles were not stable and uniformly dispersed in the medium. In the present study, the semi-fluid nematode growth gelrite medium (NGG) was used to achieve better distribution of silver nanoparticles (AgNPs). We aimed to evaluate the toxicity of AgNPs in three different culture methods, such as the NGG, nematode growth medium (NGM) and K-medium (KM). Our transmission electron microscopy, hydrodynamic diameter, and inductively coupled plasma-atomic emission spectrometry results demonstrated that AgNPs homogeneously and stably dispersed in NGG compared to that in liquid KM. Furthermore, the conventional toxicity end points, such as body length, fecundity, lifespan, population growth, germline cell apoptosis, reactive oxygen species, and mitochondrial membrane potential were used to assess the toxicity of AgNPs to Caenorhabditis elegans (C. elegans) in NGG, NGM and KM. Our results showed that the toxicity of AgNPs obtained in the NGG test medium was much higher than that in the standard NGM and KM. In addition to the improved dispersion of nanoparticles, NGG also offered advantages for long-term studies and likely provided a convenient nematode toxicity testing method. These results revealed that the NGG test medium was a suitable and sensitive culture method for the evaluation of AgNPs toxicity using C. elegans.
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Affiliation(s)
- Xun Luo
- Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China; School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China; School of Bioengineering, Huainan Normal University, Huainan, Anhui 232038, China
| | - Shengmin Xu
- Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China; Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Hefei, Anhui 230031, China.
| | - Yaning Yang
- Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China; Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Hefei, Anhui 230031, China
| | - Yajun Zhang
- Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China; Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Hefei, Anhui 230031, China
| | - Shunchang Wang
- School of Bioengineering, Huainan Normal University, Huainan, Anhui 232038, China
| | - Shaopeng Chen
- Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China; Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Hefei, Anhui 230031, China
| | - An Xu
- Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China; Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Hefei, Anhui 230031, China
| | - Lijun Wu
- Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China; School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China; Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Hefei, Anhui 230031, China.
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Dumasia K, Kumar A, Deshpande S, Sonawane S, Balasinor NH. Differential roles of estrogen receptors, ESR1 and ESR2, in adult rat spermatogenesis. Mol Cell Endocrinol 2016; 428:89-100. [PMID: 27004961 DOI: 10.1016/j.mce.2016.03.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 03/18/2016] [Accepted: 03/19/2016] [Indexed: 02/01/2023]
Abstract
Estrogens, through their receptors, play an important role in regulation of spermatogenesis. However, the precise role of the estrogen receptors (ESR1 and ESR2) has been difficult to determine as in vivo estradiol treatment would signal through both the ESRs. Hence we had developed in vivo selective ESR agonist administration models in adult male rats to decipher the individual roles of the ESRs. Treatment with both ESR1 and ESR2 agonists decreased sperm counts after 60 days of treatment. The present study aimed to delineate the precise causes of decreased sperm counts following treatment with the two ESR agonists. Treatment with ESR1 agonist causes an arrest in differentiation of round spermatids into elongated spermatids, mainly due to down-regulation of genes involved in spermiogenesis. ESR2 agonist administration reduces sperm counts due to spermiation failure and spermatocyte apoptosis. Spermiation failure observed is due to defects in tubulobulbar complex formation because of decrease in expression of genes involved in actin remodelling. The increase in spermatocyte apoptosis could be due to increase in oxidative stress and decrease in transcripts of anti-apoptotic genes. Our results suggest that the two ESRs regulate distinct aspects of spermatogenesis. ESR1 is mainly involved with regulation of spermiogenesis, while ESR2 regulates spermatocyte apoptosis and spermiation. Activation of estrogen signaling through either of the receptors can affect their respective processes during spermatogenesis and lead to low sperm output. Since many environmental estrogens can bind to the two ESRs with different affinities, these observations can be useful in understanding their potential effects on spermatogenesis.
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Affiliation(s)
- Kushaan Dumasia
- Department of Neuroendocrinology, National Institute for Research in Reproductive Health (Indian Council of Medical Research), Parel, Mumbai 400 012, India
| | - Anita Kumar
- Department of Neuroendocrinology, National Institute for Research in Reproductive Health (Indian Council of Medical Research), Parel, Mumbai 400 012, India
| | - Sharvari Deshpande
- Department of Neuroendocrinology, National Institute for Research in Reproductive Health (Indian Council of Medical Research), Parel, Mumbai 400 012, India
| | - Shobha Sonawane
- Confocal Facility, National Institute for Research in Reproductive Health (Indian Council of Medical Research), Parel, Mumbai 400 012, India
| | - N H Balasinor
- Department of Neuroendocrinology, National Institute for Research in Reproductive Health (Indian Council of Medical Research), Parel, Mumbai 400 012, India.
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