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Guo M, Li M, Cui F, Ding X, Gao W, Fang X, Chen L, Wang H, Niu P, Ma J. MTBE exposure may increase the risk of insulin resistance in male gas station workers. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2024; 26:334-343. [PMID: 38168809 DOI: 10.1039/d3em00491k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Insulin resistance is closely related to many metabolic diseases and has become a serious public health problem worldwide. So, it is crucial to find its environmental pathogenic factors. Methyl tert-butyl ether (MTBE), a widely used unleaded gasoline additive, has been proven to affect glycolipid metabolism. However, results from population studies are lacking. For this purpose, the potential relationships between MTBE exposure and the triglyceride glucose (TyG) index, a useful surrogate marker of insulin resistance, were evaluated using a small-scale occupational population. In this study, 201 participants including occupational and non-occupational MTBE exposure workers were recruited from the Occupational Disease Prevention and Control Hospital of Huaibei, and their health examination information and blood samples with informed consent were collected. The internal exposure levels were assessed by detecting blood MTBE using solid-phase-micro-extraction gas chromatography-mass spectrometry. Then the adjusted linear regression model was used to assess the relationship between MTBE exposure and fasting plasma glucose (FPG), or TyG index. Then, receiver-operating-characteristic (ROC) curves were performed to calculate the optimal cut-off points. Multivariable and hierarchical logistic regression models were used to analyze the impact of MTBE exposure on the risk of insulin resistance. Obvious correlations were observed between blood MTBE levels with TyG index (p = 0.016) and FPG (p = 0.001). Further analysis showed that using the mean of the TyG index (8.77) as a cutoff value had a good effect on reflecting the risk of insulin resistance. Multivariable logistic regression analysis also indicated that MTBE exposure was an independent risk factor for a high TyG index (OR = 1.088, p = 0.038), which indicated that MTBE exposure might be a new environmental pathogenic factor leading to insulin resistance, and MTBE exposure might increase the risk of insulin resistance by independently elevating the TyG index in male gas station workers.
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Affiliation(s)
- Mingxiao Guo
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China.
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Beijing 100069, China
| | - Mengdi Li
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China.
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Beijing 100069, China
| | - Fengtao Cui
- Occupational Disease Prevention and Control Hospital of Huaibei Mining Co., Ltd, Huaibei, Anhui Province, 235000, China
| | - Xinping Ding
- Occupational Disease Prevention and Control Hospital of Huaibei Mining Co., Ltd, Huaibei, Anhui Province, 235000, China
| | - Wei Gao
- Occupational Disease Prevention and Control Hospital of Huaibei Mining Co., Ltd, Huaibei, Anhui Province, 235000, China
| | - Xingqiang Fang
- Occupational Disease Prevention and Control Hospital of Huaibei Mining Co., Ltd, Huaibei, Anhui Province, 235000, China
| | - Li Chen
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China.
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Beijing 100069, China
| | - Hanyun Wang
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China.
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Beijing 100069, China
| | - Piye Niu
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China.
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Beijing 100069, China
| | - Junxiang Ma
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China.
- Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Beijing 100069, China
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Nadimifar M, Ghourchian H, Hosta-Rigau L, Moosavi-Movahedi AA. Structural and functional alterations of polydopamine-coated hemoglobin: New insights for the development of successful oxygen carriers. Int J Biol Macromol 2023; 253:127275. [PMID: 37804889 DOI: 10.1016/j.ijbiomac.2023.127275] [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: 07/14/2023] [Revised: 10/03/2023] [Accepted: 10/04/2023] [Indexed: 10/09/2023]
Abstract
One of the major factors that is currently hindering the development of hemoglobin (Hb)-based oxygen carriers (HBOCs) is the autoxidation of Hb into nonfunctional methemoglobin. Modification with polydopamine (PDA), which is a biocompatible free radical scavenger has shown the ability to protect Hb against oxidation. Due to its tremendous potential in the development of successful HBOCs, herein, we conduct a thorough evaluation of the effect of PDA on the stability, aggregation, structure and function of the underlying Hb. By UV-vis spectrometry we show that PDA can prevent Hb's aggregation while thermal denaturation studies indicate that, although PDA coating resulted in a lower midpoint transition temperature, it was also able to protect the protein from full denaturation. These results are further corroborated by differential scanning calorimetry. Circular dichroism reveals that PDA can promote changes in Hb's secondary structure while, by UV-vis spectroscopy, we show that PDA also interacts with the porphyrin complex located in Hb's hydrophobic pocket. Last but not least, affinity studies show that PDA-coated Hb has a higher capability for oxygen release. Such an effect is further enhanced at lower pH. Importantly, through molecular docking simulations we provide a plausible explanation for the observed experimental results.
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Affiliation(s)
| | | | - Leticia Hosta-Rigau
- DTU Health Tech, Center for Nanomedicine and Theranostics, Technical University of Denmark, Nils Koppels Allé, Building 423, 2800 Kgs. Lyngby, Denmark.
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He Z, Xian H, Tang M, Chen Y, Lian Z, Fang D, Peng X, Hu D. DNA polymerase β may be involved in protecting human bronchial epithelial cells from the toxic effects induced by methyl tert-butyl ether exposure. Hum Exp Toxicol 2021; 40:2135-2144. [PMID: 34121485 DOI: 10.1177/09603271211022788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Methyl tert-butyl ether (MTBE), a widely used gasoline additive and a ubiquitous environmental pollutant in many countries and regions, can cause various kinds of toxic effects on human health. However, the molecular mechanism underlying its toxic effects remains elusive. The present study aimed to explore the cytotoxicity, DNA damage and oxidative damage effects of MTBE on human bronchial epithelial cells (16HBE) and the possible role of DNA polymerase β (pol-β) in this process. RNA interference (RNAi) was used to obtain pol-β gene knocked-down cells (pol-β-). CCK-8 assay was adopted to analyze the cell viability. Alkaline single-cell gel electrophoresis (SCGE) was performed to detect the DNA damage effects of MTBE. The enzyme activity of GSH-Px, SOD, CAT and the level of MDA were assessed. The data indicated that when treated with MTBE at the concentration exceeding 50 μmol/L and for the time exceeding 24 h, the pol-β- exhibited significantly decreased cell viability and increased DNA damage effects, as compared to the control (P < 0.05). Furthermore, there was significant difference in the levels of GSH-pX, SOD, CAT and MDA between the pol-β- and the control (P < 0.05). Our investigation suggests that MTBE can cause obvious cytotoxicity, DNA damage and oxidative damage effects on 16HBE cells. DNA polymerase β may be involved in protecting 16HBE cells from the toxic effects induced by MTBE exposure. These findings provide a novel insight into the molecular mechanism underlying the toxic effects of MTBE on human cells.
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Affiliation(s)
- Z He
- Shiyan Institute of Preventive Medicine and Health Care, Baoan District, Shenzhen City, People's Republic of China.,Department of Environmental Health, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, People's Republic of China
| | - H Xian
- Department of Environmental Health, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, People's Republic of China
| | - M Tang
- Department of Environmental Health, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, People's Republic of China
| | - Y Chen
- Department of Environmental Health, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, People's Republic of China
| | - Z Lian
- Department of Environmental Health, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, People's Republic of China
| | - D Fang
- Department of Environmental Health, Center for Disease Control and Prevention of Shenzhen City, Shenzhen, People's Republic of China
| | - X Peng
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, People's Republic of China
| | - D Hu
- Department of Environmental Health, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, People's Republic of China
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Doroudian A, Hosseinzadeh R, Maghami P, Khorsandi K. Spectroscopic investigation on molecular aspects and structural and functional effects of tetraethyl pyrophosphate organophosphorus insecticide interaction with adult human hemoglobin. J Biomol Struct Dyn 2021; 40:7786-7795. [PMID: 33764274 DOI: 10.1080/07391102.2021.1902398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Organophosphates are extremely toxic compounds that use extensively in agriculture and household as insecticides. However, their binding mechanism to bio-macromolecules especially blood proteins is not clearly understood. In this research, various spectroscopic techniques utilized to analyze the effect of Tetraethyl Pyrophosphate (TEPP), as an organophosphorus insecticide, on the structure, function, stability, and aggregation of adult human hemoglobin and also hemolysis potential of the TEPP on red blood cells (RBCs) examined. Molecular docking was used for TEPP binding to human Hemoglobin (Hb), too. The results demonstrated that the TEPP insecticide has the potential for lysing RBCs. UV-Vis experiment indicated that globin part and heme group influenced by TEPP. Oxygen affinity measurements revealed the formation of deoxy-Hb and met-Hb, also decreased in oxygen affinity of Hb upon interaction with TEPP that is due to heme destruction. Fluorescence spectroscopy confirmed the production of heme degradation species after interaction of Hb with TEPP, which is inconsistent with oxygen affinity measurements. Thermal and aggregation studies indicated that TEPP induced aggregation of Hb in a concentration manner and Tm of protein reduced to lower temperatures. Docking's study also showed that TEPP interacts with Hb through hydrophobic interactions, which confirms UV-Vis results. ATR-FTIR study also revealed that TEPP can induce changes in the alpha helix element of Hb's secondary structure. Totally, Experimental and theoretical results indicate that tetraethyl pyrophosphate has unfavorable effects on hemoglobin structure and function.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Aida Doroudian
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Reza Hosseinzadeh
- Department of Medical Laser, Medical Laser Research Center, YARA Institute, ACECR, Tehran, Iran
| | - Parvaneh Maghami
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Khatereh Khorsandi
- Department of the Photodynamic, Medical Laser Research Center, YARA Institute, ACECR, Tehran, Iran
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Han J, Miao L, Song Y. Preparation of co-Co 3 O 4 /carbon nanotube/carbon foam for glucose sensor. J Mol Recognit 2019; 33:e2820. [PMID: 31835276 DOI: 10.1002/jmr.2820] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 09/07/2019] [Accepted: 09/16/2019] [Indexed: 12/28/2022]
Abstract
Co-Co3 O4 /carbon nanotube/carbon foam (Co-Co3 O4 /CNT/CF) nanocomposites were prepared by soaking melamine foam into a solution of Co(NO3 )2 ·6H2 O, followed by calcination in N2 and air in sequence. The obtained Co-Co3 O4 /CNT/CF nanocomposites were characterized with scanning electron microscopy and cyclic voltammetry. It was found that Co3 O4 nanoparticles were grown on the external of CF successfully, while CNTs were grown on the surfaces of CF in a large amount, which further improved the electrical conductivity of the. The prepared Co-Co3 O4 /CNT/CF nanocomposites were then used to construct nonenzymatic sensor to detect glucose in alkaline solution. The sensor showed detection range from 1.2 μM to 2.29 mM with a detection limit of 0.4 μM (S/N =3) and a high sensitivity of 637.5 μA-1 cm-2 . The developed sensor also showed an instant response, favorable reproducibility, and high selectivity. The results attest that Co-Co3 O4 /CNT/CF composites have great potential in the development of nonenzymatic sensors for glucose.
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Affiliation(s)
- Jiajia Han
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
| | - Longfei Miao
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
| | - Yonghai Song
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
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