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Dwivedi S, Francis KAD, Sharma A. Protective Role of Hsp27 in the Nonylphenol-Induced Locomotory and Longevity Toxicity. JOURNAL OF HEALTH AND ALLIED SCIENCES NU 2023. [DOI: 10.1055/s-0043-1761213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Abstract
Background Gut health is directly proportional to an organism's fitness. Our recent study showed a functional link between oxidative stress and heat shock protein 27 (Hsp27, a stress protein) in the Drosophila larval gut, which coordinates the nonylphenol (an endocrine disruptor) allied sub-cellular and developmental adversities.
Objective In continuation with the prior study, the present study aimed to explore the association of Hsp27 with locomotory and survival against nonylphenol-induced toxicity in the Drosophila gut.
Methods and Methodology The freshly emerged adult flies were exposed to nonylphenol (5.0 µg/mL) for 10 to 40 days, and their locomotory performance (climbing activity) and survivability were assessed. ANOVA was used to evaluate the statistical significance of the mean values in control and treated flies.
Results Nonylphenol exposure markedly influenced locomotory activity and survivability after 30 to 40 days. For instance, ∼76% (40 days) declined locomotor behavior, and ∼35% (40 days) reduced survivability was observed. While the overexpression of Hsp27 in the organism's gut showed improvement in locomotory performance and survivability after 30 to 40 days. No significant alteration in locomotory performance and survivability was observed after 10 to 20 days of nonylphenol exposure.
Conclusion The present study illustrates that Hsp27 overexpression in the Drosophila gut improves the locomotory performance and survivability in the nonylphenol exposed Drosophila. This also indicates the possible connection between the gut and organismal fitness.
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Affiliation(s)
- Shiwangi Dwivedi
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research (NUCSER), Division of Environmental Health and Toxicology, Karnataka, India
| | - Kean Anthony Daniel Francis
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research (NUCSER), Division of Environmental Health and Toxicology, Karnataka, India
| | - Anurag Sharma
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research (NUCSER), Division of Environmental Health and Toxicology, Karnataka, India
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Jiang Q, Di Q, Shan D, Xu Q. Nonylphenol inhibited HIF-1alpha regulated aerobic glycolysis and induced ROS mediated apoptosis in rat Sertoli cells. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 241:113822. [PMID: 35777343 DOI: 10.1016/j.ecoenv.2022.113822] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/23/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
Nonylphenol (NP) is an endocrine disruptor with reproductive toxicity, which can induce apoptosis of Sertoli cells (SCs). SCs have a high aerobic glycolytic flux to ensure sufficient lactate for germ cells as central energy metabolite, and hypoxia-inducible factors 1alpha (HIF-1α) is a major regulator of glycolysis. This study aimed to investigate whether NP can alter HIF-1α-regulated aerobic glycolysis metabolism and thus induce apoptosis in rat SCs. The results revealed that cell viability, intracellular and extracellular lactate levels, the expression of Hk2, Ldha and Mct4, and the protein levels of HIF-1α, HK2, LDHA and MCT4 were decreased significantly when rat SCs exposed to 20 and 30 μM NP for 24 h. Compared with the 30 μM NP group, the protein levels of HIF-1α, HK2 and LDHA, the expression of Hk2 and Ldha and intracellular lactate levels were increased in 30 μM NP and 125 μM cobalt chloride (CoCl2, inhibitor of HIF-1α proteasome-mediated degradation) co-treated group. Furthermore, the elevation of reactive oxygen species (ROS) and apoptosis induced by 30 μM NP were also reversed. In summary, exposure to NP inhibited the ability of SCs to produce and secrete lactate. Meanwhile, NP exposure could lead to a decrease in HIF-1α thereby inhibiting aerobic glycolysis in rat SCs, disrupting intracellular homeostasis and further inducing ROS-mediated apoptosis. This research is the first to explore the NP toxicity on SCs function with respect to nutrition support to germ cells, and provide new evidence on the inhibition of aerobic glycolysis inducing ROS-mediated apoptosis in SCs.
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Affiliation(s)
- Qianqian Jiang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Qiannan Di
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Dandan Shan
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Qian Xu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China.
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Ekdal A, Okutman Tas D, Zengin GE, Onay IB, Olmez Hanci T, Orhon D, Cokgor E. Co-metabolism of nonylphenol ethoxylate in sequencing batch reactor under aerobic conditions. Biodegradation 2022; 33:181-194. [PMID: 35142961 DOI: 10.1007/s10532-022-09974-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 01/24/2022] [Indexed: 11/02/2022]
Abstract
The study evaluated the co-metabolism of nonylphenol polyethoxylate (NPEO) within a main substrate stream subjected to biodegradation in an activated sludge system. Peptone mixture simulating sewage was selected as the synthetic substrate. As a novel approach, the NPEO concentration was magnified to match the COD level of the peptone mixture, so that co-metabolism could be evaluated by respirometry and modeling. A sequencing batch reactor (SBR) set-up at high sludge age to also allow nitrification was operated for this purpose. A long acclimation phase was necessary to start NPEO biodegradation, which was completed with 15% residual by-products. Modeling of respirometric data could identify COD fractions of NPEO with corresponding process kinetics for the first time, where the biodegradation of by-products could be interpreted numerically as a hydrolysis mechanism. Nonylphenol diethoxylate (NP2EO) was observed as the major by-product affecting the biodegradation of NPEO, because NPEO and NP2EO accounted for 60 to 70% of the total soluble COD in the solution during the course of biological reactions. The co-metabolism characteristics basically defined NPEO as a substrate, with no appreciable inhibitory action on the microbial culture both in terms of heterotrophic and autotrophic activities.
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Affiliation(s)
- Alpaslan Ekdal
- Environmental Engineering Department, Faculty of Civil Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey
| | - Didem Okutman Tas
- Environmental Engineering Department, Faculty of Civil Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey
| | - Gulsum Emel Zengin
- Environmental Engineering Department, Faculty of Civil Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey
| | - Irmak Batı Onay
- Environmental Engineering Department, Faculty of Civil Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey
| | - Tugba Olmez Hanci
- Environmental Engineering Department, Faculty of Civil Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey
| | - Derin Orhon
- The Science Academy, 34349, Istanbul, Turkey
| | - Emine Cokgor
- Environmental Engineering Department, Faculty of Civil Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey.
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Shan D, Wang J, Di Q, Jiang Q, Xu Q. Steatosis induced by nonylphenol in HepG2 cells and the intervention effect of curcumin. Food Funct 2021; 13:327-343. [PMID: 34904613 DOI: 10.1039/d1fo02481g] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Non-alcoholic fatty liver disease (NAFLD) has increasingly become a serious public health problem. There is growing evidence that nonylphenol (NP) exposure may cause steatosis, but the underlying mechanism is not fully understood. Curcumin (CUR) improves NAFLD-related lipid metabolism disorders and oxidative stress, but its preventive and therapeutic effects on NP-induced steatosis have not been reported. The objective of this investigation was to determine the capability and potential mechanism of NP to induce steatosis in vitro and the intervention of curcumin. HepG2 cells were treated with 0 μM, 20 μM, 30 μM, 40 μM NP for 24 h. Lipid droplets accumulated significantly in HepG2 cells after NP treatment, and the concentration of triglyceride (TG) and total cholesterol (T-CHO) increased significantly. Simultaneously, lipogenesis gene expression was up-regulated significantly, fatty acid oxidation (FAO) gene expression was significantly down-regulated, and reactive oxygen species (ROS) were overproduced. Meanwhile, the expression of p-AMPK/AMPK in the AMPK/mTOR signaling pathway was significantly down-regulated and the expression of p-mTOR/mTOR was markedly up-regulated. However, blocking ROS production with N-acetyl-L-cysteine (NAC) can reverse these phenomena. In addition, our study found that curcumin effectively ameliorated the effects of NP-induced steatosis. Our study indicates that NP can induce steatosis in HepG2 cells, and may be implicated in inhibiting the ROS-dependent AMPK/mTOR pathway, and that curcumin ameliorates the NAFLD-like changes induced by NP in HepG2 cells.
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Affiliation(s)
- Dandan Shan
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China.
| | - Jinming Wang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China.
| | - Qiannan Di
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China.
| | - Qianqian Jiang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China.
| | - Qian Xu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China.
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Liu T, Di QN, Sun JH, Zhao M, Xu Q, Shen Y. Effects of nonylphenol induced oxidative stress on apoptosis and autophagy in rat ovarian granulosa cells. CHEMOSPHERE 2020; 261:127693. [PMID: 32736244 DOI: 10.1016/j.chemosphere.2020.127693] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/30/2020] [Accepted: 07/10/2020] [Indexed: 06/11/2023]
Abstract
Nonylphenol (NP) is a kind of environmental endocrine disruptors which is generally recognized to cause female reproductive toxicity, but its basic mechanism has not been fully elucidated. In this study, granulosa cells (GCs) were treated with 0-70 μM NP for 24 h, the cell viability of GCs was reduced significantly, as well as increased cell apoptosis with G2/M arrest. Furthermore, NP significantly induced autophagy and the production of reactive oxygen species (ROS). However, these phenomenons were inhibited by blocking the production of ROS with N-Acetyl-l-cysteine (NAC) administration. Intriguingly, the inhibition of autophagy with 3-Methyladenine (3-MA) could enhance the apoptosis induced by NP. Moreover, the down regulating of p-Akt/Akt, p-mTOR/mTOR and subsequent up-regulation of p-AMPK/AMPK induced by NP can be rescued by pretreatment of NAC. Our findings suggested that NP promotes rat ovarian GCs apoptosis and autophagy simultaneously, which may involve the activation of ROS-dependent Akt/AMPK/mTOR pathway. Whatever, the activation of autophagy is likely to develop a protective mechanism to improve the apoptosis of rat ovarian GCs induced by NP.
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Affiliation(s)
- Teng Liu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Qian-Nan Di
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Jia-Hui Sun
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Meng Zhao
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Qian Xu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China.
| | - Yang Shen
- Department of Obstetrics and Gynecology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China.
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Wang JM, Xu R, Di QN, Fu HW, Xu Q. Determination of urinary carnitine levels as a potential indicator of uterine fibroids caused by nonylphenol exposure. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1152:122248. [PMID: 32590215 DOI: 10.1016/j.jchromb.2020.122248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 05/15/2020] [Accepted: 06/11/2020] [Indexed: 11/26/2022]
Abstract
Our previous studies have shown that uterine fibroids are associated with nonylphenol (NP) exposure, and the changes of carnitines in critical reproductive tissues and body fluids could be used to indicate the female reproductive toxicity caused by NP exposure. In this work, on the basis of further clarifying the correlation between NP exposure level and uterine fibroids, the possibility of the urinary carnitine levels as a potential indicator of uterine fibroids caused by NP exposure was discussed. The urine samples were collected from 84 female volunteers: the control group of 34 healthy women without gynecological disease and 50 uterine fibroids patients, respectively. Methods were respectively established for the determination of NP and eight carnitines in human urine samples by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The results showed that the NP level of uterine fibroids group was significantly higher than that of control group (P = 0.002), indicating that NP exposure was an important environmental factor in the occurrence of uterine fibroids. It was further found that in urine samples of the uterine fibroids group, the levels of L-Carnitine (C0), L-Acetyl-carnitine (C2), L-Octanoyl-carnitine (C8), Tetradecanoyl-carnitine (C14), Oleoyl-carnitine (C18:1) and Linoleoyl-carnitine (C18:2) had obviously increased compared with those in the control group (P < 0.001; < 0.001; < 0.001; = 0.003; < 0.001; = 0.010). The concentrations of L-Hexanoyl-carnitine (C6) and L-Palmitoyl-carnitine (C16) in the uterine fibroids group were also higher than those in the control group, although the difference was not statistically significant (P > 0.05). The results suggested that the changes in urinary carnitine levels might be a potential indicator to help to warn of the risk of uterine fibroids caused by NP exposure at the early stage.
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Affiliation(s)
- Jin-Ming Wang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Run Xu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Qian-Nan Di
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Hao-Wei Fu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Qian Xu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China.
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Liu T, Cao W, Di Q, Zhao M, Xu Q. Evaluation of toxicokinetics of nonylphenol in the adult female Sprague-Dawley rats using a physiologically based toxicokinetic model. Regul Toxicol Pharmacol 2019; 105:42-50. [PMID: 30954491 DOI: 10.1016/j.yrtph.2019.03.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 03/02/2019] [Accepted: 03/31/2019] [Indexed: 10/27/2022]
Abstract
The physiologically based toxicokinetic (PBTK) model was firstly developed in female rats to quantitatively evaluate toxicokinetics of nonylphenol (NP). Changes in NP serum concentrations over time of single oral NP administration experiments in Sprague-Dawley rats and literature data were collected to establish and calibrate the PBTK model in the SimBiology framework. The calibrated model predicted the serum and tissue NP concentrations of repeat oral NP administration for model evaluation. NP concentrations in serum and tissues (liver, kidneys, adipose, brain, uterus and ovaries) were quantified using ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The model output of the time course data (values are within the standard deviation defined for each data point) indicated proximity of predictions to reality. The coefficients of determination r2 were all greater than 0.9, and the root mean squared error (RMSE) were within 0.177-2.027, which means the model predicted and observed serum NP concentrations were in excellent agreement. The results indicated that the model could contribute to a simplification of the future exposure risk assessments of NP in a more realistic scenario and provided a better understanding of the disposition process of NP in human.
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Affiliation(s)
- Teng Liu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Weixin Cao
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Qiannan Di
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Meng Zhao
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Qian Xu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China.
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Di QN, Cao WX, Xu R, Lu L, Xu Q, Wang XB. Chronic low-dose exposure of nonylphenol alters energy homeostasis in the reproductive system of female rats. Toxicol Appl Pharmacol 2018; 348:67-75. [PMID: 29641977 DOI: 10.1016/j.taap.2018.04.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/30/2018] [Accepted: 04/04/2018] [Indexed: 12/31/2022]
Abstract
Nonylphenol (NP) as a confirmed endocrine disrupt chemical that causes reproductive and developmental toxicity. Previous studies focused only on short-term, high-dose exposure in vivo, or in vitro on female reproductive toxicity, which cannot accurately simulate the real human exposure scenario. The present study aims to explore NP toxicity and the underlying mechanisms of chronic low-dose NP exposure (500 μg/kg·bw/day, for 8 weeks) in the reproductive system of female rats. The results indicated that NP exposure caused female reproductive toxicity, including alterations in serum 17β-estradiol (E2) levels, endometria hyperplasia, altered oogenesis and significant changes in the metabolic profile observed in urine, serum, uterus and ovary. Furthermore, expression of the energy-sensitive proteins carnitine palmitoyltransferase I (CPTI), adenosine 5'-monophosphate-activated protein kinase (AMPK) and peroxisome proliferator-activated receptor gamma (PPAR-γ) were found to be down-regulated in uterus under NP exposure, which suggested the impaired fatty acid oxidation. Accordingly, a comprehensive metabolomics study in key reproductive tissues and body fluids revealed that 12 metabolites were associated with energy metabolism as potential biomarkers for the evaluation of low toxicity at early stages, with L-carnitines being the most representative ones. The present findings provide evidence that chronic low-dose NP exposure can significantly disrupt energy homeostasis in females, thus offering further insights into NP reproductive toxicity.
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Affiliation(s)
- Qian-Nan Di
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Wei-Xin Cao
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Run Xu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Lingeng Lu
- Department of Chronic Disease Epidemiology, Yale School of Public Health, School of Medicine, Yale University, 60 College Street, New Haven, CT 06520-8034, USA
| | - Qian Xu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China.
| | - Xiao-Bin Wang
- Laboratory Animal Center, Southeast University, Nanjing 210009, China.
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Katipoglu-Yazan T. Modelling aerobic stabilization of domestic and industrial sludge using a multi-component biomass model. ENVIRONMENTAL TECHNOLOGY 2015; 36:2013-2023. [PMID: 25687597 DOI: 10.1080/09593330.2015.1019574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The objective of the study was to investigate the achievable limits of aerobic sludge stabilization applied on waste-activated sludge generated in domestic, tannery, and pharmaceutical wastewater treatment plants. Stabilization study involved monitoring of conventional parameters and model evaluation of oxygen uptake rate and particulate components of waste sludge. Multi-component biomass approach was adopted based on death-regeneration mechanism. The results showed that sludge stabilization efficiency ranged between 25% and 30%, which was closely related to the fate of different particulate fractions of biomass, that is, viable biomass, hydrolysable particulates, and microbial metabolic products. Model calibration exercises yield in rate coefficient ranges of 0.18-0.32/day for biomass decay and 0.60-0.65/day for hydrolysis of non-biomass components. Degradation rates of particulate metabolic products were estimated as 0.035, 0.04, and 0.01/day for domestic, tannery, and pharmaceutical sludge, respectively. Relatively low degradation rates compared to conventional biological treatment processes confirmed reduced microbial activity in the course of aerobic stabilization.
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Affiliation(s)
- Tugce Katipoglu-Yazan
- a Faculty of Civil Engineering, Environmental Engineering Department , Istanbul Technical University , 34469 Maslak, Istanbul , Turkey
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