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Chen Z, Zhang H, Huang X, Tao Y, Chen Z, Sun X, Zhang M, Tse LA, Weng S, Chen W, Li W, Wang D. Association of noise exposure with lipid metabolism among Chinese adults: mediation role of obesity indices. J Endocrinol Invest 2024:10.1007/s40618-024-02420-4. [PMID: 38909326 DOI: 10.1007/s40618-024-02420-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 06/19/2024] [Indexed: 06/24/2024]
Abstract
PURPOSE Noise exposure in the workplace has been linked to a number of health consequences. Our objectives were to explore the relationship between occupational noise and lipid metabolism and evaluate the possible mediating effect of obesity indices in those relationships with a cross-sectional study design. METHODS Cumulative noise exposure (CNE) was used to measure the level of noise exposure. Logistic regression models or generalized linear models were employed to evaluate the association of occupational noise and obesity with lipid metabolism markers. Cross-lagged analysis was conducted to explore temporal associations of obesity with lipid metabolism. RESULTS A total of 854 participants were included, with each one-unit increase in CNE, the values of total cholesterol/high-density lipoprotein cholesterol and low-density lipoprotein cholesterol/high-density lipoprotein cholesterol increased by 0.013 (95% confidence interval: 0.006, 0.020) and 0.009 (0.004, 0.014), as well as the prevalence of dyslipidemia increased by 1.030 (1.013, 1.048). Occupational noise and lipid metabolism markers were all positively associated with body mass index (BMI), waist circumference (WC), a Body Shape Index (ABSI) and a Body Shape Index and Body Roundness Index (BRI) (all P < 0.05). Moreover, BMI, WC, ABSI and BRI could mediate the associations of occupational noise with lipid metabolism; the proportions ranged from 21.51 to 24.45%, 23.84 to 30.14%, 4.86 to 5.94% and 25.59 to 28.23%, respectively (all P < 0.05). CONCLUSIONS Our study demonstrates a positive association between occupational noise and abnormal lipid metabolism, and obesity may partly mediate the association. Our findings reinforce the need to take practical steps to reduce or even eliminate the health risks associated with occupational noise.
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Affiliation(s)
- Z Chen
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, 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, 430030, Hubei, China
| | - H Zhang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, 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, 430030, Hubei, China
| | - X Huang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, 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, 430030, Hubei, China
| | - Y Tao
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, 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, 430030, Hubei, China
| | - Z Chen
- Wuhan Prevention and Treatment Center for Occupational Diseases, Wuhan, 430015, Hubei, China
| | - X Sun
- National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - M Zhang
- National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - L A Tse
- Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute of the Chinese University of Hong Kong, Shenzhen, China
| | - S Weng
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, 518020, Guangdong, China
| | - W Chen
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, 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, 430030, Hubei, China
| | - W Li
- Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute of the Chinese University of Hong Kong, Shenzhen, China
| | - D Wang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, 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, 430030, Hubei, China.
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Liu W, Liu H, Gao W, Xie L, Cao Y. Physiological Effects of Co-exposure to Ionizing Radiation and Noise within Occupational Exposure Limits. HEALTH PHYSICS 2023; 125:332-337. [PMID: 37552111 DOI: 10.1097/hp.0000000000001722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
ABSTRACT Workers are frequently exposed to the occupational hazards of ionizing radiation and noise. Co-exposure to these hazards is not well understood in terms of their physiological effects. The aim of this study was to investigate the physiological effects of co-exposure to ionizing radiation and noise within the occupational limit. This study extracted the physical examination parameters of workers who met the screening criteria from the occupational health surveillance database. The workers were divided into three groups: the co-exposure (COE) group, the ionizing radiation exposure (ION) group, and the non-exposure (NON) group. The age and sex of the three groups were matched with a sample size ratio of 1:3:3. The physical examination parameters of the three groups of workers were compared. The results showed that there was no significant difference in blood pressure and blood biochemical parameters among the three groups. The COE group had higher levels of free triiodothyronine than the ION group, but there was no difference with the NON group. Moreover, the COE group had lower levels of free tetraiodothyronine than the ION group and the NON group. There was no significant difference in thyroid stimulating hormone, total triiodothyronine, and total tetraiodothyronine among the three groups. Additionally, the number of white blood cells of the COE group was lower than that of ION group and NON group. This study suggests that co-exposure to low-dose ionizing radiation and noise can cause alterations in thyroid hormone and peripheral white blood cells. These alterations are different from those observed after single exposure to low-dose ionizing radiation and require further research.
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Affiliation(s)
- Wenyi Liu
- Department of Health Policy Management, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, and Shanghai Bluecross Medical Science Institute, Shanghai, The People's Republic of China; Institute for Hospital Management, Tsing Hua University, Shenzhen Campus, The People's Republic of China
| | - Huaqing Liu
- Gusu District Health Supervision Institute, Suzhou, Jiangsu, The People's Republic of China
| | - Weimin Gao
- Department of Physical Examination Center, Suzhou Industrial Park Center for Disease Control and Prevention, Suzhou, Jiangsu, The People's Republic of China
| | - Liangbin Xie
- Department of general family medicine, Baita Community Health Service Center of Suzhou, Suzhou, Jiangsu, The People's Republic of China
| | - Yanmei Cao
- Department of Occupational Disease, The Fifth People's Hospital of Suzhou, Suzhou, Jiangsu, The People's Republic of China
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Abouee-Mehrizi A, Rasoulzadeh Y, Solali S, Esmaeilizadeh H, Iraji Z, Mesgari-Abbasi M. Hematotoxicity induced by simultaneous exposure to noise and toluene in New Zealand white rabbits: Synergistic and antagonistic effects. Toxicol Ind Health 2023:7482337231180404. [PMID: 37303071 DOI: 10.1177/07482337231180404] [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: 06/13/2023]
Abstract
Exposure to numerous pollutants is prevalent in workplaces. Examination of combined exposure to different harmful physical factors and chemicals has offered new insights into toxicology in recent years. This study aimed to investigate the hematological alterations caused by exposure to noise and toluene. Twenty-four New Zealand white rabbits were exposed to 1000 ± 50 ppm toluene and/or 100 ± 5 dB noise for 14 consecutive days. Exposure to noise and toluene changed a number of parameters of white blood cells (WBC), red blood cells (RBC), and platelets on different days after the exposure. Simultaneous exposure to noise and toluene increased WBC, and exposure to noise and toluene alone decreased RBC. Exposure to noise and toluene alone increased basophile, monocyte, and neutrophil counts. The coefficient of variation of red blood cell distribution width (RDW-CV) and the standard deviation of red blood cell distribution width (RDW-SD) significantly increased after co-exposure to noise and toluene. Platelet levels increased in the noise-exposed and the co-exposed groups and decreased in the toluene-exposed group. Furthermore, co-exposure to noise and toluene induced dissimilar synergistic and antagonistic effects on the hematological indices. According to the results of this study, simultaneous exposure to toluene and noise can aggravate some hematotoxic effects compared to exposure to noise or toluene alone. The results also demonstrated the vital role of the modulatory mechanisms of the body in controlling the detrimental effects of stressors.
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Affiliation(s)
- Amirreza Abouee-Mehrizi
- Department of Occupational Health Engineering, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yahya Rasoulzadeh
- Department of Occupational Health Engineering, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saeed Solali
- Department of Immunology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hadi Esmaeilizadeh
- Department of Anesthesiology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zeynab Iraji
- Department of Statistics and Epidemiology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mehran Mesgari-Abbasi
- Drug Applied Research Center (DARC), Tabriz University of Medical Sciences, Tabriz, Iran
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Mohammad-Ghasemi M, Dehghani-Bidgoli S, Ahmadi T, Nikbakht N, Heidarifar S, Sadeghi-Yarandi M. Investigating the effect of workplace noise exposure on cardiovascular disease risk factors in a power plant industry: A case-control study. Work 2023; 76:1429-1440. [PMID: 37393469 DOI: 10.3233/wor-220396] [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: 07/03/2023] Open
Abstract
BACKGROUND Occupational noise exposure is a significant health problem. In addition to hearing impairments, noise as a stressor may cause cardiovascular problems. OBJECTIVE This study aimed to investigate the effect of exposure to workplace noise on cardiovascular disease risk factors. METHODS This case-control study was conducted in 2021 in a power plant in Iran. In this study, the health status of 406 employees in both exposed (n = 203) and non-exposed (n = 203) to noise groups was examined for cardiovascular disease risk factors. Also, the trend of changes in the studied variables from 2012 to 2020 in exposed employees was examined. Data were collected from participants' annual physical examinations and occupational noise exposure measurements. To measure the noise in the present study, the KIMO-DB300 noise level meter was used. Data were analyzed in SPSS-26 software. RESULTS The results revealed that mean fasting blood sugar (FBS), triglyceride, liver enzyme (SGOT), blood pressure, and body mass index were significantly different in the two groups (p-value<0.05). There was no significant difference in the mean of creatinine, cholesterol, and liver enzyme (SGPT) between the two groups (p-value>0.05). In the exposed group, the mean of all studied variables except diastolic blood pressure was statistically different during the study years (p-value<0.05). CONCLUSION This study demonstrates that exposure to noise above the permissible level can affect the cardiovascular disease risk factors, so it is recommended to apply engineering and management measures like using Hearing Conservation Programme (HCP) to reduce the risk of these diseases with periodically assessing the health status of employees and timely diagnosis.
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Affiliation(s)
- Mostafa Mohammad-Ghasemi
- Department of Environmental Science and Engineering, Islamic Azad University, West Tehran Branch, Tehran, Iran
| | | | - Thelma Ahmadi
- Department of Rocket and Space Engineering, Kharkiv Aviation Institute, National Aerospace University, Kharkiv, Ukraine
| | - Neda Nikbakht
- Department of Chemical Engineering-Health, Safety and Environment, Islamic Azad University, Najafabad Branch, Najafabad, Iran
- Human and Sustainable Development Research Center, Islamic Azad University, Najafabad Branch, Najafabad, Iran
| | - Shima Heidarifar
- Department of Occupational Health Engineering, Faculty of Health, Qom University of Medical Sciences, Qom, Iran
| | - Mohsen Sadeghi-Yarandi
- Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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Alinaghipour A, Ashabi G, Riahi E, Soheili M, Salami M, Nabavizadeh F. Effects of nano-curcumin on noise stress-induced hippocampus-dependent memory impairment: behavioral and electrophysiological aspects. Pharmacol Rep 2022; 74:461-469. [DOI: 10.1007/s43440-022-00354-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/11/2022] [Accepted: 01/12/2022] [Indexed: 12/11/2022]
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Michaud D, Sivakumaran K, Ritonja J, Waseem H, AlShenaiber L, Morgan E, Ahmadi S, Denning A, Morgan R. Impact of Noise Exposure on Risk of Developing Stress-Related Metabolic Effects: A Systematic Review and Meta-Analysis. Noise Health 2022; 24:215-230. [PMID: 36537446 PMCID: PMC10088431 DOI: 10.4103/nah.nah_21_22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Background Exposure to noise can increase biological stress reactions, which may increase adverse health effects, including metabolic disorders; however, the certainty in the association between exposure to noise and metabolic outcomes has not been widely explored. The objective of this review is to evaluate the evidence between noise exposures and metabolic effects. Materials and Methods A systematic review of English and comparative studies available in PubMed, Cochrane Central, EMBASE, and CINAHL databases between January 1, 1980 and December 29, 2021 was performed. Risk of Bias of Nonrandomized Studies of Exposures was used to assess risk of bias of individual studies and certainty of the body of evidence for each outcome was assessed using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. Results Fifty-six primary studies reporting on cortisol, cholesterol levels, waist circumference, glucose levels, and adrenaline and/or noradrenaline were identified. Although meta-analyses suggested that there may be an increase in waist circumference and adrenaline with increased noise exposure, the certainty in the evidence is very low. Overall, the certainty in the evidence of an effect of increased noise on all the outcomes were low to very low due to concerns with risk of bias, inconsistency across exposure sources, populations, and studies, and imprecision in the estimates of effects. Conclusions The certainty of the evidence of increased noise on metabolic effects was low to very low, which likely reflects the inability to compare across the totality of the evidence for each outcome. The findings from this review may be used to inform policies involving noise reduction and mitigation strategies, and to direct further research in areas that currently have limited evidence available.
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Nassiri P, Monazzam MR, Dehghan SF, Teimori G, Zakerian SA, Azam K, Asghari M. The combined effect of industrial noise type, level and frequency characteristics on hand motor skills: A lab trial study. Work 2021; 68:711-719. [PMID: 33612515 DOI: 10.3233/wor-203405] [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: 11/15/2022] Open
Abstract
BACKGROUND The study aimed to assess the interactive effects of industrial noise type, level and frequency characteristics on hand motor skills using the Minnesota Manual Dexterity Test and the Hand Tool Dexterity Test. METHODS A total of ten nonsmoking male volunteers with normal hearing and vision were selected for this study. The study followed a full 3×3×2 factorial design. Independent variables were noise type (steady, intermittent and fluctuating), noise level (75, 85 and 95 dBA) and frequency characteristics ("roar" <2000 Hz and "hiss" >2000 Hz). RESULTS For Minnesota Manual Dexterity Test, the lowest speed is related to steady hiss noise at 75 dBA and the highest speed is related to fluctuating roar noise at 95 dBA. The speed is being significantly affected by the frequency characteristic (P = 0.041) and noise type (P = 0.025). The effect of hiss noise on speed is greater than roar noise (P = 0.038). There is a significant difference (P = 0.035) between continuous noise and fluctuating noise. For the Hand Tool Dexterity Test, the lowest speed is related to fluctuating hiss noise at 95 dBA and the highest speed is related to steady roar noise at 95 dBA. The speed is being significantly affected by the frequency characteristic (P = 0.002), noise type (P = 0.0001) and noise level (P = 0.005). The effect of hiss noise on response variable to be greater than roar noise (P = 0.008). There is a significant difference (P = 0.0001) between steady noise and the two other types of noise, and also there is a significant difference between 75 dBA and 85 dBA level (P = 0.003). CONCLUSIONS The results showed that on hand motor skills, speed response was influenced by three characteristics: the type of noise, frequency characteristics and noise level. Also, the effect of the hiss noise was more than the roar noise.
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Affiliation(s)
- Parvin Nassiri
- Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Monazzam
- Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Somayeh Farhang Dehghan
- Department of Occupational Health, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Gholamheidar Teimori
- Department of Occupational Health Engineering, School of Health, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran.,Health Sciences Research Center, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
| | - Seyed Abolfazl Zakerian
- Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Kamal Azam
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Asghari
- Department of Occupational Health, School of Public Health, Arak University of Medical Sciences, Arak, Iran
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Office Distractions and the Productivity of Building Users: The Effect of Workgroup Sizes and Demographic Characteristics. BUILDINGS 2021. [DOI: 10.3390/buildings11020055] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Knowledge workers are experiencing ever-increasing distractions or unwanted interruptions at workplaces. We explored the effect of unwanted interruptions on an individual’s perceived productivity in various building types, user groups and workgroups. A case study of 68 buildings and their 5149 occupants using the Building Use Studies methodology was employed in this study. The database contains information on the occupants’ perceptions of physical and environmental parameters, including unmined data on the frequency of unwanted interruptions. Pearson’s correlation was used to test the correlation between the variables. In order to determine whether there are any statistically significant differences between the means of two or more independent (unrelated) groups, one-way ANOVA was employed to examine the significance of differences in mean scores between various user groups and workgroups. The evidence of clear correlations between the frequency of unwanted interruptions and perceived productivity is detailed in various user groups and in multiple building types. The Pearson correlation coefficients were −0.361 and −0.348 for sustainable and conventional buildings, respectively, demonstrating a lower sensitivity to unwanted interruptions in sustainable buildings. Females and older participants were more sensitive to unwanted interruptions and their productivity levels were reduced much more by unwanted interruptions. Comparing different sized workgroups, the highest sensitivity to unwanted interruptions for occupants in offices shared with more than 8 people was found. The findings of this study contribute to the understanding of different user needs and preferences in the design of workplaces.
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Mapuranga M, Maziriri ET, Letshaba RK, Chitamba A. Does occupational noise matter amongst manufacturing (small and medium enterprises) workers? Empirical evidence from Magaba, Mbare, Zimbabwe. SOUTH AFRICAN JOURNAL OF COMMUNICATION DISORDERS 2020; 67:e1-e11. [PMID: 32129661 PMCID: PMC7136821 DOI: 10.4102/sajcd.v67i2.680] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 02/03/2020] [Accepted: 02/02/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND The significance of how occupational noise can influence attitudes towards occupational noise exposure, susceptibility to hearing loss and job performance has generally been neglected in the past studies. OBJECTIVES The aim of this study was to determine the impact of occupational noise on attitudes towards occupational noise exposure, susceptibility to hearing loss and job performance of manufacturing small and medium enterprises (SMEs) workers in Zimbabwe. METHOD A survey was conducted involving 250 respondents, including manufacturing SME workers, and the hypotheses were analysed by applying structural equation modelling. RESULTS Occupational noise had a positive and significant effect on attitudes towards occupational noise exposure and perceived susceptibility to hearing loss amongst manufacturing SME workers. In addition, attitudes towards exposure to occupational noise and the perceived susceptibility of hearing loss have had a positive and significant impact on manufacturing SME workers' job performance. CONCLUSION The novelty of the research is its analysis of occupational noise as an indicator of attitudes towards occupational noise exposure and susceptibility to hearing loss as well as job performance. This study provides practitioners with beneficial implications. Collective knowledge on occupational noise could help manufacturing SME managers in recognising the perceptions of employees on occupational noise and how it ultimately affects job performance. Moreover, this study is intended to add new knowledge to the current body of African occupational noise literature - a context that has not received much research attention in developing countries.
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Affiliation(s)
- Miston Mapuranga
- School of Managerial Leadership, The Da Vinci Institute for Technology Management, Johannesburg.
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Adverse effects of noise stress on glucose homeostasis and insulin resistance in Sprague-Dawley rats. Heliyon 2019; 5:e03004. [PMID: 31890958 PMCID: PMC6926183 DOI: 10.1016/j.heliyon.2019.e03004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 10/11/2019] [Accepted: 12/05/2019] [Indexed: 12/03/2022] Open
Abstract
Noise pollution remains a pervasive health hazard that people encounter especially in large commercial metropolis and has been implicated in many adverse non-auditory health conditions such as hypertension, atherosclerosis, vascular (endothelial) dysfunction and metabolic disorders. There is a growing body of evidence showing that chronic noise exposure is associated with an increased risk of hypercholesterol, adiposity and development of type 2 diabetes. The present study investigated the effect of noise stress on parameters of glucose homeostasis in male rats and possible recovery after noise cessation. Twenty-four (24) adult male Sprague-Dawley rats were designated into four groups (n = 6 per group). All rats except the control group were exposed to 95dB noise using a noise generator for 28 consecutive days. A group of rats was investigated immediately after 28 days of noise exposure (NE28), while others were left to recover from noise stress for 7 days (NER7) or 14 days (NER14). OGTT and ITT were performed using standard methods. Plasma levels of triglyceride (TRIG), total cholesterol (CHOL), low density lipoprotein (LDL) and high-density lipoprotein (HDL) were determined. Serum level of insulin, corticosterone (CORT) and corticosterone-releasing-factor (CRF) were determined using ELISA. Homeostasis model assessment-insulin resistance (HOMA-IR) and glycogen content in liver as well as gastrocnemius muscle were also determined. Although glucose tolerance remained unchanged in the noise-exposed groups, insulin sensitivity was however significantly reduced compared with control. There was significant increase (P < 0.05) in the level of CHOL, LDL and HDL. Noise also increased (P < 0.05) both insulin and CORT levels; and elicited a higher HOMA-IR index in NE28 rats. Hepatic and myocytic glycogen content were lower (P < 0.05) in NE28 rats relative to control. The reported changes above were reversed following a 14-day noise withdrawal period. Noise-induced insulin resistance may result from dysregulation of the stress axis and appears to be reversible with noise cessation.
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Mohammadi H, Farhang Dehghan S, Tahamtan A, Golbabaei F. Evaluation of potential biomarkers of exposure to crystalline silica: A case study in an insulator manufacturer. Toxicol Ind Health 2018; 34:491-498. [PMID: 29734927 DOI: 10.1177/0748233718770073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The purpose of this study was to examine the potential determinants of serum neopterin, malondialdehyde (MDA), and erythrocyte glutathione (GSH) as potential markers of oxidative stress, resulting in cellular immune response to inhaled silica particles. This descriptive analytical study was conducted on two groups of exposed workers ( n = 55) and unexposed office workers ( n = 38) of an insulator manufacturing plant. The sampling of airborne silica in the breathing zone of participants was done on the basis of the National Institute for Occupational Safety and Health Method 7601. The blood samples were analyzed by high performance liquid chromatography to determine the level of serum neopterin. A ZellBio GmbH assay kit was used for the quantitative assays of GSH and MDA on the basis of the colorimetric assay. The results of this study show that the measurements of serum neopterin, MDA, and GSH can be considered as potential biological markers of silica exposure for undertaking further comprehensive studies in this area.
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Affiliation(s)
- Hamzeh Mohammadi
- 1 Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Somayeh Farhang Dehghan
- 2 Department of Occupational Health, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Alireza Tahamtan
- 3 Infectious Disease Research Center, Golestan University of Medical Sciences, Gorgan, Iran.,4 Department of Microbiology, Golestan University of Medical Sciences, Gorgan, Iran
| | - Farideh Golbabaei
- 5 Department of Occupational Health, Tehran University of Medical Sciences, Tehran, Iran
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Mohammadi H, Farhang Dehghan S, Golbabaei F, Roshani S, Pakzad R, Foroughi P, Hajizadeh R. Pulmonary Functions and Health-Related Quality of Life among Silica-Exposed Workers. TANAFFOS 2017; 16. [PMID: 28638426 PMCID: PMC5473384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND This study aimed to investigate the pulmonary functions of silica-exposed workers and their health-related quality of life in an insulator manufacturing industry. MATERIALS AND METHODS In this cross-sectional study, participants selected from the manufacturing unit (n = 127) constituted the exposed group and those from the administrative department (n = 30) constituted the unexposed group. All subjects were evaluated using personal air sampling of crystalline silica, pulmonary function tests, and a quality of life questionnaire (36-item short form health survey [SF-36]). RESULTS The mean (SD) concentrations of crystalline silica were 0.507 (0.23) mg/m3 and 0.0116 (0.008) mg/m3 for the exposed and unexposed groups, respectively. All the pulmonary function indices and all the physical and mental health domains of the workers were significantly lower than those of the administrative clerks (p < 0.05). The silica concentration did not significantly correlate with the quality of life components and all the pulmonary function indices (p > 0.05), except for forced vital capacity (FVC) and forced expiratory volume in one second (FEV1) (p < 0.05). CONCLUSION In conclusion, the workers exposed to higher levels of crystalline silica had lower values of pulmonary function indices and lower health-related quality of life; however, further follow-up studies are needed to confirm these findings.
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Affiliation(s)
- Hamzeh Mohammadi
- Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Somayeh Farhang Dehghan
- Department of Occupational Health, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farideh Golbabaei
- Department of Occupational Health, Tehran University of Medical Sciences, Tehran,Iran.,Correspondence to: Golbabaei F, Address: Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Poursina St, Keshavarz Blvd, Tehran, Iran., Email address:
| | - Saman Roshani
- Department of Occupational Health, Student Research Committee, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Pakzad
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Parvin Foroughi
- Department of Occupational Health, Student Research Committee, Tehran University of Medical Sciences, Tehran, Iran
| | - Roohalah Hajizadeh
- Occupational Health Research Center, Qom University of Medical Sciences, Qom, Iran
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Mohammadi H, Dehghan SF, Golbabaei F, Ansari M, Yaseri M, Roshani S, Divani R. Evaluation of Serum and Urinary Neopterin Levels as a Biomarker for Occupational Exposure to Crystalline Silica. Ann Med Health Sci Res 2016; 6:274-279. [PMID: 28503343 PMCID: PMC5414438 DOI: 10.4103/amhsr.amhsr_140_16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background: Crystalline silica is a commonly used mineral in various industries and construction activities, and it is so important introducing potential biomarkers to identify early indicators of biological effects in its high-risk occupational exposures. Aim: The present study was aimed to assess the blood and urinary neopterin as an early biomarker of exposure in the workers of an insulator manufacturing plant who are exposed to crystalline silica. Subjects and Methods: This analytical descriptive study was done among two groups of exposed workers (n = 55) and unexposed office workers (n = 38) of an insulator manufacturing plant. Statistical software R was used to determine sample size and select the participants by random sampling among nonsmoker workers. Sampling of airborne silica in breathing zone of participants was done based on the National Institute for Occupational Safety and Health method 7601. The urinary and blood samples were collected and prepared for analysis by high-performance liquid chromatography to determine the level of urinary and serum neopterin. All of the statistical analyses were carried out using SPSS 22. Results: The airborne silica concentration was significantly different between two exposed and unexposed groups (P < 0.001, 0.27 [0.11] vs. 0.0028 [0.0006] mg/m3, respectively). The urinary neopterin in exposed group is significantly higher than the unexposed one (P < 0.001, 97.67 [30.24] vs. 55.52 [2.18] μmol/mol creatinine, respectively). Neopterin level of serum in exposed group is higher than the unexposed group, and there is a significant difference between them (P < 0.001, 6.90 [2.70] vs. 2.20 [1.20] nmol/l, respectively). The positive significant correlations were found between silica exposure concentration with urinary and serum neopterin (P < 0.001, r = 0.36 and 0.59, respectively). Conclusions: Considering the sensitively and easily measurement of neopterin in biological fluid and also the statistically significant positive relationships which were found between the airborne silica concentration and neopterin levels in the present study, the serum and urinary neopterin levels can be considered the potential biomarkers of silica exposure for doing further comprehensive studies in this area.
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Affiliation(s)
- H Mohammadi
- Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - S F Dehghan
- Department of Occupational Health, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - F Golbabaei
- Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - M Ansari
- Department of Clinical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - M Yaseri
- Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - S Roshani
- Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - R Divani
- Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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