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Struijs F, Hooijmans CR, Buijs M, Dahan A, Hoffmann S, Kiffen R, Mandrioli D, Menon J, Ritskes-Hoitinga M, Roeleveld N, de Ruijter A, Scheffer GJ, Schlünssen V, Scheepers PTJ. Establishing a health-based recommended occupational exposure limit for isoflurane using experimental animal data: a systematic review protocol. Syst Rev 2023; 12:166. [PMID: 37710304 PMCID: PMC10503167 DOI: 10.1186/s13643-023-02331-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 08/18/2023] [Indexed: 09/16/2023] Open
Abstract
BACKGROUND Isoflurane is used as an inhalation anesthetic in medical, paramedical, and veterinary practice. Epidemiological studies suggest an increased risk of miscarriages and malformations at birth related to maternal exposure to isoflurane and other inhalation anesthetics. However, these studies cannot be used to derive an occupational exposure level (OEL), because exposure was not determined quantitatively and other risk factors such as co-exposures to other inhalation anesthetics and other work-related factors may also have contributed to the observed adverse outcomes. The aim of this systematic review project is to assess all available evidence on the effects of isoflurane in studies of controlled exposures in laboratory animals to derive a health-based recommended OEL. METHODS A comprehensive search strategy was developed to retrieve all animal studies addressing isoflurane exposure from PubMed, EMBASE, and Web of Science. Title-abstract screening will be performed by machine learning, and full-text screening by one reviewer. Discrepancies will be resolved by discussion. We will include primary research in healthy, sexually mature (non human) vertebrates of single exposure to isoflurane. Studies describing combined exposure and treatments with > = 1 vol% isoflurane will be excluded. Subsequently, details regarding study identification, study design, animal model, and intervention will be summarized. All relevant exposure characteristics and outcomes will be extracted. The risk of bias will be assessed by two independent reviewers using an adapted version of the SYRCLE's risk of bias tool and an addition of the OHAT tool. For all outcomes for which dose-response curves can be derived, the benchmark dose (BMD) approach will be used to establish a point of departure for deriving a recommended health-based recommended OEL for 8 h (workshift exposure) and for 15 min (short-term exposure). DISCUSSION Included studies should be sufficiently sensitive to detect the adverse health outcomes of interest. Uncertainties in the extrapolation from animals to humans will be addressed using assessment factor. These factors are justified in accordance with current practice in chemical risk assessment. A panel of experts will be involved to reach consensus decisions regarding significant steps in this project, such as determination of the critical effects and how to extrapolate from animals to humans. SYSTEMATIC REVIEW REGISTRATION PROSPERO CRD42022308978.
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Affiliation(s)
- Fréderique Struijs
- Radboud Institute for Biological and Environmental Sciences, Radboud University, Nijmegen, The Netherlands
| | - Carlijn R Hooijmans
- Department of Anaesthesiology, Pain and Palliative Care, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Marije Buijs
- Radboud Institute for Biological and Environmental Sciences, Radboud University, Nijmegen, The Netherlands
| | - Albert Dahan
- Leiden University Medical Center, Leiden, The Netherlands
| | - Sebastian Hoffmann
- The Evidence-Based Toxicology Collaboration (EBTC), Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
| | - Romy Kiffen
- Radboud Institute for Biological and Environmental Sciences, Radboud University, Nijmegen, The Netherlands
| | - Daniele Mandrioli
- Cesare Maltoni Cancer Research Center, Ramazzini Institute, Bologna, Italy
| | - Julia Menon
- Netherlands Heart Institute, Utrecht, The Netherlands
| | | | - Nel Roeleveld
- Department for Health Evidence, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Anne de Ruijter
- Radboud Institute for Biological and Environmental Sciences, Radboud University, Nijmegen, The Netherlands
| | - Gert Jan Scheffer
- Department of Anaesthesiology, Pain and Palliative Care, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Vivi Schlünssen
- Department of Public Health, Danish Ramazzini Centre, Aarhus University, Aarhus, Denmark
- National Research Center for the Working Environment, Copenhagen, Denmark
| | - Paul T J Scheepers
- Radboud Institute for Biological and Environmental Sciences, Radboud University, Nijmegen, The Netherlands.
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Yan D, Liu B, Wei X, Ou W, Liao M, Ji S, Peng Y, Liu J, Wu S, Wang M, Ju Y, Zhang L, Li Z, Li L, Zhang Y. Efficacy and safety of nitrous oxide for patients with treatment-resistant depression, a randomized controlled trial. Psychiatry Res 2022; 317:114867. [PMID: 36191556 DOI: 10.1016/j.psychres.2022.114867] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/16/2022] [Accepted: 09/24/2022] [Indexed: 01/04/2023]
Abstract
Nitrous oxide (N2O), an N-methyl-D-aspartate glutamate receptor antagonist, has demonstrated a rapid-onset antidepressant effect for treatment-resistant depression (TRD) preliminarily in the United States. This study aimed to test the efficacy and safety of N2O for TRD patients in China. In this double-blinded, placebo-controlled trial, 44 patients with TRD were randomized to receive a one-hour inhalation of a mixture of either 50% N2O/50% oxygen (N2O group) or 50% air/50% oxygen (placebo group). The primary outcome was the change on the 17-item Hamilton Depression Rating Scale (HDRS-17) over a course of two weeks. Using modified intention-to-treat analysis, the between group difference was found in the HDRS-17 score at two hours and 24 h after inhalation treatment, while no significant difference was found in week one and week two. Patients receiving N2O reported a significantly higher number of adverse events. All the adverse events lasted for no more than 24 h. No serious adverse events were reported. A single inhalation of 50% N2O effectively alleviates depression in patients with TRD in China. The efficacy lasts for no more than one week. N2O is safe for patients with TRD.
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Affiliation(s)
- Danfeng Yan
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China; Shanxi Mental Health Center, Taiyuan Fifth People's Hospital, Taiyuan, Shanxi 030045, China
| | - Bangshan Liu
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China
| | - Xiyu Wei
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China
| | - Wenwen Ou
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China
| | - Mei Liao
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China
| | - Shanling Ji
- Gansu Provincial Key Laboratory of Wearable Computing, School of Information Science and Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Yan Peng
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China
| | - Jin Liu
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China
| | - Shibin Wu
- Nanning Fifth People's Hospital, Nanning, Guangxi 530028, China
| | - Mi Wang
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China
| | - Yumeng Ju
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China
| | - Li Zhang
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China
| | - Zexuan Li
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China
| | - Lingjiang Li
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China.
| | - Yan Zhang
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China; Mental Health Institute of Central South University, China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Hunan Medical Center for Mental Health, Changsha 410011, Hunan, China.
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The Clinical Presentations of Nitrous Oxide Users in an Emergency Department. TOXICS 2022; 10:toxics10030112. [PMID: 35324737 PMCID: PMC8950993 DOI: 10.3390/toxics10030112] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 02/04/2023]
Abstract
Today, the concomitant abuse of nitrous oxide (N2O) and illicit drugs is evident and problematic. However, there are few reports regarding the clinical manifestations of N2O users when they present to the emergency department (ED). The purpose of this study was to describe the clinical presentations, the associated illicit substances used in combination, and the outcomes in N2O users visiting the ED. This was a retrospective observational cohort study. All N2O adult users admitted to the ED at Linkou Chang Gung Memorial Hospital between 2012 and 2020 were included. Demographic variables, clinical symptoms, and examination results were collected from medical records. Univariate comparisons were conducted between pure N2O users and combined illicit drug users. A total of 40 patients were included, 24 of which were pure N2O users. Limb weakness and numbness accounted for the majority of chief complaints. Neurologic symptoms were the most common clinical manifestations (90%). A more severe ED triage level, faster heart rate, greater agitation, and cardiovascular symptoms were significantly noted in combined illicit drug users. In ED, limb numbness/weakness should arouse physicians’ awareness of patients using N2O. Combined use of N2O and illicit drugs can cause great harm to health.
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Xiang Y, Li L, Ma X, Li S, Xue Y, Yan P, Chen M, Wu J. Recreational Nitrous Oxide Abuse: Prevalence, Neurotoxicity, and Treatment. Neurotox Res 2021; 39:975-985. [PMID: 33770366 DOI: 10.1007/s12640-021-00352-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 03/05/2021] [Accepted: 03/08/2021] [Indexed: 01/16/2023]
Abstract
Nitrous oxide (N2O), also known as "laughing gas," is a colorless, nonirritating gas. Clinically, it is widely used as an inhaled anesthetic, analgesic, and anxiolytic. In recent years, recreational abuse of N2O has become increasingly common, especially among young adults and adolescents, but many of them lack awareness of the possible side effects associated with this drug. N2O abuse can damage multiple systems, especially the nervous system, but the exact mechanism of N2O toxicity remains controversial. At present, an increasing number of cases of nervous system damage caused by N2O abuse have been reported both at home and abroad. Discontinuation of N2O use and timely supplementation with vitamin B12 are essential for a good prognosis. Long-term abuse without timely treatment will eventually lead to irreversible neurological damage. In this article, we discuss the epidemiology of N2O abuse, neurotoxicity mechanisms, clinical manifestations, relevant auxiliary examinations, treatments, and prognosis to improve social awareness of N2O exposure risk, especially among users and clinicians.
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Affiliation(s)
- Yuanyuan Xiang
- Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, No. 324 JingWu Road, 250021, Jinan, Shandong, People's Republic of China
| | - Lei Li
- Department of Neurology, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, People's Republic of China
| | - Xiaotong Ma
- Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, No. 324 JingWu Road, 250021, Jinan, Shandong, People's Republic of China
| | - Shan Li
- Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, No. 324 JingWu Road, 250021, Jinan, Shandong, People's Republic of China
| | - Yuan Xue
- Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, No. 324 JingWu Road, 250021, Jinan, Shandong, People's Republic of China
| | - Peng Yan
- Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, No. 324 JingWu Road, 250021, Jinan, Shandong, People's Republic of China
| | - Meijie Chen
- Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, No. 324 JingWu Road, 250021, Jinan, Shandong, People's Republic of China
| | - Junwei Wu
- Department of Orthopaedics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, No. 324 JingWu Road, 250021, Jinan, Shandong, People's Republic of China.
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Effects of sevoflurane exposure on apoptosis and cell cycle of peripheral blood lymphocytes, and immunologic function. BMC Anesthesiol 2021; 21:87. [PMID: 33743600 PMCID: PMC7980647 DOI: 10.1186/s12871-021-01305-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 02/28/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Waste anesthetic gases (WAGs) leaked from new-type halogenated inhalational anesthetics such as sevoflurane have been were reported to pose a risk for the health of operating room personnel. The effects of WAGs on peripheral blood lymphocytes, however, remain yet controversial. The present study was undertaken to examine the effects of occupational sevoflurane exposure on the peripheral blood lymphocytes of medical personnel who work in the operating room. METHODS A cohort of 56 medical residents were divided into exposed group (n = 28) and control group (non-exposed group) (n = 28). Gas chromatography was used to measure the concentration of sevoflurane in the medical resident's breathing zone during surgeries under inhalation anesthesia in the exposure group. The gas collection lasted an hour. Peripheral blood lymphocytes were isolated from venous blood, and then apoptosis and cell cycle were analyzed by flow cytometry. EDTA-anticoagulated whole blood was harvested to analyze the lymphocyte subsets by flow cytometry. Immunoglobulins (IgA, IgM, IgG) were quantified by immunoturbidimetry. RESULTS The average concentration of sevoflurane in the exposed group was 1.03 ppm with a range from 0.03 ppm to 2.24 ppm. No significant effects were found on the apoptosis rates or cell cycles of peripheral blood lymphocytes in the exposed group relative to the control group (P > 0.05). Similarly, there were no significant differences in the lymphocyte subsets or the levels of immunoglobulins (IgA, IgM, IgG) between the two groups (P > 0.05). CONCLUSIONS Occupational exposure to low-level sevoflurane has no significant effect on the peripheral blood lymphocytes of operating room staff, but this conclusion needs to be confirmed by multicenter and long-term follow-up studies with large samples. TRIAL REGISTRATION NUMBER AND DATE OF REGISTRATION ChiCTR2000040772 , December 9, 2020 (Retrospective registration).
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Emara AM, Alrasheedi KA, Aldubayan MA, Alhowail AH, Elgarabawy RM. Effect of inhaled waste anaesthetic gas on blood and liver parameters among hospital staff. Hum Exp Toxicol 2020; 39:1585-1595. [DOI: 10.1177/0960327120938840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A significant health risk exists within a section of health workers that are exposed to anaesthetic gas and vapours, found in the atmosphere of treatment or operating rooms. These compounds are classified as waste anaesthetic gases (WAG). The present study aimed at identifying alterations in hepatic and haematological parameters occurring as a result of chronic exposure to WAG potentially affecting the health of team members working in hospitals. Therefore, operating room operatives, vulnerable to long-standing WAG exposure, were recruited for this study. Sevoflurane anaesthesia metabolites (inorganic fluoride and hexafluoroisopropanol (HFIP)), haematological indices and liver toxicity markers (alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, gamma-glutamyl transferase and osteopontin) were measured. The collected results showed increased plasma inorganic fluoride, HFIP and liver toxicity markers, as well as disturbances in haematological parameters. In conclusion, exposure to halogenated inhalational anaesthetics, in general, and Sevoflurane, in particular, induces alterations in hepatic markers and haematological indices.
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Affiliation(s)
- AM Emara
- Department of Pharmacology and Toxicology, College of Pharmacy, Qassim University, Buraydah, Saudi Arabia
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - KA Alrasheedi
- Khyber General Hospital, Ministry of Health, Khyber, Saudi Arabia
| | - MA Aldubayan
- Department of Pharmacology and Toxicology, College of Pharmacy, Qassim University, Buraydah, Saudi Arabia
| | - AH Alhowail
- Department of Pharmacology and Toxicology, College of Pharmacy, Qassim University, Buraydah, Saudi Arabia
| | - RM Elgarabawy
- Department of Pharmacology and Toxicology, College of Pharmacy, Qassim University, Buraydah, Saudi Arabia
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tanta University, Tanta, Egypt
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Neghab M, Amiri F, Soleimani E, Yousefinejad S, Hassanzadeh J. Toxic responses of the liver and kidneys following occupational exposure to anesthetic gases. EXCLI JOURNAL 2020; 19:418-429. [PMID: 32327960 PMCID: PMC7174577 DOI: 10.17179/excli2019-1911] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 03/19/2020] [Indexed: 12/20/2022]
Abstract
This study was undertaken to determine whether exposure of operating room personnel to inhalation anesthetics, including nitrous oxide, isoflurane, and sevoflurane was associated with any hepatotoxic or nephrotoxic changes. Fifty-two operating room personnel and 52 non-exposed subjects were studied. A questionnaire pertaining to demographic characteristics and medical history of participants was completed. Fasting blood samples were taken from all subjects to measure the functional parameters of kidneys and liver. Biological monitoring was also performed to detect the urinary concentration of IAs. Urinary concentrations of nitrous oxide, isoflurane, and sevoflurane were found to be 175.8 ± 77.52, 4.95 ± 3.43, and 15.0 3± 16.06 ppm, respectively. The mean levels of alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, gamma-glutamyltransferase, Alpha-glutathione-S-transferase, as well as the serum levels of kidney injury molecule-1, creatinine and calcium were significantly higher in the exposed group. Statistically significant associations were observed between exposure to inhalation anesthetics and the mean levels of aspartate aminotransferase, alanine aminotransferase, and gamma-glutamyltransferase, serum creatinine, kidney injury molecule-1, and calcium. Under the exposure scenario described in the present study, occupational exposure to inhalation anesthetics was associated with subtle, subclinical, pre-pathologic changes in the parameters of liver and kidneys. Additionally, Alpha-glutathione-S-transferase and kidney injury molecule-1 were found to be sensitive markers for early detection of subclinical changes in the parameters of kidney and liver function in subjects who are exposed to inhalation anesthetics.
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Affiliation(s)
- Masoud Neghab
- Department of Occupational Health Engineering, Research Center for Health Sciences, Institute of Health, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fatemeh Amiri
- Department of Occupational Health Engineering, Social Determinants in Health Promotion Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Esmaeel Soleimani
- Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saeed Yousefinejad
- Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Jafar Hassanzadeh
- Department of Clinical Epidemiology, School of Health, Shiraz University of MedicalSciences, Shiraz, Iran
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Fluegge K. A model of lipid dysregulation and altered nutrient status in Alzheimer's disease. ALZHEIMER'S & DEMENTIA (NEW YORK, N. Y.) 2019; 5:139-145. [PMID: 31065583 PMCID: PMC6495090 DOI: 10.1016/j.trci.2019.03.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
INTRODUCTION Dysregulated lipid metabolism and nutrient status are thought to play a role in the pathophysiology of Alzheimer's disease (AD). However, the precise involvement is not well understood, and it remains unclear exactly how such dysregulated lipid metabolism and altered nutrient status, especially changes in phosphatidylcholine, B12, and folate, are connected to the hallmark pathology in AD (i.e., amyloidogenesis). METHODS We have postulated that genetic susceptibility (i.e., APOE ε4/ε4) to environmental exposure to emissions of nitrous oxide (N2O) could underlie the onset of AD and its early neuropsychiatric correlates. RESULTS AND DISCUSSION The current theoretical editorial describes, using clinical, preclinical, and in vitro evidences, how this model contributes not only to amyloidogenesis but also other nonopioid effects, specifically altered lipid metabolism, depletion of vitamin B12, and disruption of the folate-mediated one carbon metabolic pathway.
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Affiliation(s)
- Keith Fluegge
- Institute of Health and Environmental Research, Columbus OH 43220
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