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Petit P, Gondard E, Gandon G, Moreaud O, Sauvée M, Bonneterre V. Agricultural activities and risk of Alzheimer's disease: the TRACTOR project, a nationwide retrospective cohort study. Eur J Epidemiol 2024; 39:271-287. [PMID: 38195954 PMCID: PMC10995077 DOI: 10.1007/s10654-023-01079-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 11/02/2023] [Indexed: 01/11/2024]
Abstract
Data regarding Alzheimer's disease (AD) occurrence in farming populations is lacking. This study aimed to investigate whether, among the entire French farm manager (FM) workforce, certain agricultural activities are more strongly associated with AD than others, using nationwide data from the TRACTOR (Tracking and monitoring occupational risks in agriculture) project. Administrative health insurance data (digital electronic health/medical records and insurance claims) for the entire French agricultural workforce, over the period 2002-2016, on the entire mainland France were used to estimate the risk of AD for 26 agricultural activities with Cox proportional hazards model. For each analysis (one for each activity), the exposed group included all FMs that performed the activity of interest (e.g. crop farming), while the reference group included all FMs who did not carry out the activity of interest (e.g. FMs that never farmed crops between 2002 and 2016). There were 5067 cases among 1,036,069 FMs who worked at least one year between 2002 and 2016. Analyses showed higher risks of AD for crop farming (hazard ratio (HR) = 3.72 [3.47-3.98]), viticulture (HR = 1.29 [1.18-1.42]), and fruit arboriculture (HR = 1.36 [1.15-1.62]). By contrast, lower risks of AD were found for several animal farming types, in particular for poultry and rabbit farming (HR = 0.29 [0.20-0.44]), ovine and caprine farming (HR = 0.50 [0.41-0.61]), mixed dairy and cow farming (HR = 0.46 [0.37-0.57]), dairy farming (HR = 0.67 [0.61-0.73]), and pig farming (HR = 0.30 [0.18-0.52]). This study shed some light on the association between a wide range of agricultural activities and AD in the entire French FMs population.
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Affiliation(s)
- Pascal Petit
- CNRS, UMR 5525, VetAgro Sup, Grenoble INP, CHU Grenoble Alpes, TIMC, Univ. Grenoble Alpes, 38000, Grenoble, France.
- Centre Régional de Pathologies Professionnelles et Environnementales, CHU Grenoble Alpes, 38000, Grenoble, France.
- AGEIS, Univ. Grenoble Alpes, 38000, Grenoble, France.
| | - Elise Gondard
- CNRS, UMR 5525, VetAgro Sup, Grenoble INP, CHU Grenoble Alpes, TIMC, Univ. Grenoble Alpes, 38000, Grenoble, France
| | - Gérald Gandon
- Centre Régional de Pathologies Professionnelles et Environnementales, CHU Grenoble Alpes, 38000, Grenoble, France
| | - Olivier Moreaud
- Centre Mémoire de Ressources et de Recherche, CHU Grenoble Alpes, 38000, Grenoble, France
- Laboratoire de Psychologie et Neurocognition, UMR 5105, CNRS, LPNC, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, 38000, Grenoble, France
| | - Mathilde Sauvée
- Centre Mémoire de Ressources et de Recherche, CHU Grenoble Alpes, 38000, Grenoble, France
- Laboratoire de Psychologie et Neurocognition, UMR 5105, CNRS, LPNC, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, 38000, Grenoble, France
| | - Vincent Bonneterre
- CNRS, UMR 5525, VetAgro Sup, Grenoble INP, CHU Grenoble Alpes, TIMC, Univ. Grenoble Alpes, 38000, Grenoble, France
- Centre Régional de Pathologies Professionnelles et Environnementales, CHU Grenoble Alpes, 38000, Grenoble, France
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Ali A, Abdi SAH, Ali A, Ahmad W. Hexaconazole exposure disrupt acetylcholinesterase, leading to mental illness. Toxicol Res (Camb) 2023; 12:775-782. [PMID: 37915471 PMCID: PMC10615806 DOI: 10.1093/toxres/tfad067] [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: 05/15/2023] [Revised: 05/15/2023] [Accepted: 07/18/2023] [Indexed: 11/03/2023] Open
Abstract
Hexaconazole is widely used in agricultural work, and it has been observed that it has potential to disrupt endocrine function and it has also capacity of bioaccumulation. In this study, we examined how the hexaconazole disrupts the usual balance of acetylcholinesterase. It has been already reported that heavy pesticide exposures may be a reason for several mental illnesses because these pesticides may disrupt normal balance of acetylcholinesterase. In this paper, we have done a complete molecular and dynamics analysis to understand the behavior of hexaconazole with acetylcholinesterase so that its toxicological aspect may be explored. Our findings revealed that hexaconazole has potency to interact with acetylcholinesterase in a stable manner. The binding energy of hexaconazole was found to be -7.95 kcal/mol. However, chlorpyrifos, known inhibitors of acetylcholinesterase, has binding energy of -7.17 kcal/mol. With respect to stability analysis, hexaconazole has similar stability like chlorpyrifos. Root-mean-square deviation, root-mean-square fluctuation, radius of gyration, hydrogen bonding, and solvent accessible surface area were similar to chlorpyrifos. In addition, density functional theory computations analysis reveals that hexaconazole is energetically stable like chlorpyrifos, which is necessary for establishing a stable ligand-protein complex. The result of this complete molecular analysis reveals that hexaconazole may disrupt the acetylcholinesterase balance, which leads to mental illness.
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Affiliation(s)
- Abuzer Ali
- Department of Pharmacognosy, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Sayed Aliul Hasan Abdi
- Department of Pharmacy, Al Baha University, Al Baha 1988, Saudi Arabia
- University of Tennessee, Health Science Center, USA
| | - Amena Ali
- Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Wasim Ahmad
- Department of Pharmacy, Mohammed Al-Mana College for Medical Sciences, Dammam 34222, Saudi Arabia
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Schubert CR, Paulsen AJ, Alex Pinto A, Chappell RJ, Chen Y, Ferrucci L, Hancock LM, Cruickshanks KJ, Merten N. Effect of Neurotoxin Exposure on Blood Biomarkers of Neurodegeneration and Alzheimer Disease. Alzheimer Dis Assoc Disord 2023; 37:310-314. [PMID: 37698523 PMCID: PMC10841324 DOI: 10.1097/wad.0000000000000579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 07/25/2023] [Indexed: 09/13/2023]
Abstract
AIM To determine whether exposure to neurotoxins in midlife is associated with changes in blood-based biomarkers of neurodegeneration and Alzheimer disease pathology. METHODS Blood cadmium, lead, neurofilament light (NfL) chain, total tau (TTau), and amyloid beta (Aβ) 40 and Aβ42 concentrations were measured in 1516 participants in the Beaver Dam Offspring Study. Linear mixed-effect models were used to determine associations between baseline cadmium and lead levels and baseline NfL, TTau, and Aβ42/Aβ40, and 10-year change in concentrations using repeated measures of these biomarkers as the outcome. RESULTS In women, higher cadmium and lead levels were associated with higher baseline TTau concentrations. A higher baseline cadmium level was associated with lower baseline Aβ42/Aβ40 in both men and women. In age-sex-adjusted models, a doubling in baseline cadmium level was associated with a 0.2% (95% CI: 0.0, 0.3) higher increase per year in NfL concentrations. In men, a doubling of baseline lead level was associated with a 0.9% (95% CI: 0.1, 1.7) higher increase per year in TTau concentration. CONCLUSIONS Participants with relatively higher levels of cadmium and lead had blood biomarker concentrations consistent with more neuronal damage and Alzheimer disease pathology. Environmental exposure to neurotoxins may contribute to neurodegeneration.
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Affiliation(s)
- Carla R. Schubert
- Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Adam J. Paulsen
- Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - A. Alex Pinto
- Department of Biostatistics and Medical Informatics, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Richard J. Chappell
- Department of Biostatistics and Medical Informatics, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
- Department of Statistics, School of Computer, Data & Information Sciences, University of Wisconsin - Madison, Madison, WI, USA
| | - Yanjun Chen
- Department of Ophthalmology and Visual Sciences, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Luigi Ferrucci
- Longitudinal Study Section, Intramural Research Program, National Institute on Aging, NIH, Baltimore, MD, USA
| | - Laura M. Hancock
- Department of Neurology, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
- William S. Middleton Memorial VA Medical Center, Madison, WI, USA
| | - Karen J. Cruickshanks
- Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
- Department of Ophthalmology and Visual Sciences, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Natascha Merten
- Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
- Department of Medicine - Division of Geriatrics and Adult Development, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
- Wisconsin Alzheimer’s Disease Research Center, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
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Torres-Sánchez ED, Ortiz GG, Reyes-Uribe E, Torres-Jasso JH, Salazar-Flores J. Effect of pesticides on phosphorylation of tau protein, and its influence on Alzheimer's disease. World J Clin Cases 2023; 11:5628-5642. [PMID: 37727721 PMCID: PMC10506003 DOI: 10.12998/wjcc.v11.i24.5628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/17/2023] [Accepted: 08/08/2023] [Indexed: 08/24/2023] Open
Abstract
Alzheimer's disease (AD) is a progressive and neurodegenerative illness which results in alterations in cognitive development. It is characterized by loss/dysfunction of cholinergic neurons, and formation of amyloid plaques, and formation of neurofibrillary tangles, among other changes, due to hyperphosphorylation of tau-protein. Exposure to pesticides in humans occurs frequently due to contact with contaminated food, water, or particles. Organochlorines, organophosphates, carbamates, pyrethroids and neonicotinoids are associated with the most diagnosed incidents of severe cognitive impairment. The aim of this study was to determine the effects of these pesticides on the phosphorylation of tau protein, and its cognitive implications in the development of AD. It was found that exposure to pesticides increased the phosphorylation of tau protein at sites Ser198, Ser199, Ser202, Thr205, Ser396 and Ser404. Contact with these chemicals altered the enzymatic activities of cyclin-dependent kinase 5 and glycogen synthase kinase 3 beta, and protein phosphatase-2A. Moreover, it altered the expression of the microtubule associated protein tau gene, and changed levels of intracellular calcium. These changes affected tau protein phosphorylation and neuroinflammation, and also increased oxidative stress. In addition, the exposed subjects had poor level of performance in tests that involved evaluation of novelty, as test on verbal, non-verbal, spatial memory, attention, and problem-solving skills.
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Affiliation(s)
- Erandis D Torres-Sánchez
- Department of Medical and Life Sciences, University Center of la Cienega, University of Guadalajara, Ocotlan 47820, Jalisco, Mexico
| | - Genaro G Ortiz
- Department of Philosophical and Methodological Disciplines and Service of Molecular Biology in Medicine Hospital Civil, University of Guadalajara, Guadalajara 44340, Jalisco, Mexico
| | - Emmanuel Reyes-Uribe
- Department of Medical and Life Sciences, University Center of la Cienega, University of Guadalajara, Ocotlan 47820, Jalisco, Mexico
| | - Juan H Torres-Jasso
- Department of Biological Sciences, CUCOSTA, University of Guadalajara, Puerto Vallarta 48280, Jalisco, Mexico
| | - Joel Salazar-Flores
- Department of Medical and Life Sciences, University Center of la Cienega, University of Guadalajara, Ocotlan 47820, Jalisco, Mexico
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Ścibior A, Llopis J, Dobrakowski PP, Męcik-Kronenberg T. CNS-Related Effects Caused by Vanadium at Realistic Exposure Levels in Humans: A Comprehensive Overview Supplemented with Selected Animal Studies. Int J Mol Sci 2023; 24:ijms24109004. [PMID: 37240351 DOI: 10.3390/ijms24109004] [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: 04/27/2023] [Revised: 05/16/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023] Open
Abstract
Neurodegenerative disorders, which are currently incurable diseases of the nervous system, are a constantly growing social concern. They are progressive and lead to gradual degeneration and/or death of nerve cells, resulting in cognitive deterioration or impaired motor functions. New therapies that would ensure better treatment results and contribute to a significant slowdown in the progression of neurodegenerative syndromes are constantly being sought. Vanadium (V), which is an element with a wide range of impacts on the mammalian organism, is at the forefront among the different metals studied for their potential therapeutic use. On the other hand, it is a well-known environmental and occupational pollutant and can exert adverse effects on human health. As a strong pro-oxidant, it can generate oxidative stress involved in neurodegeneration. Although the detrimental effects of vanadium on the CNS are relatively well recognized, the role of this metal in the pathophysiology of various neurological disorders, at realistic exposure levels in humans, is not yet well characterized. Hence, the main goal of this review is to summarize data on the neurological side effects/neurobehavioral alterations in humans, in relation to vanadium exposure, with the focus on the levels of this metal in biological fluids/brain tissues of subjects with some neurodegenerative syndromes. Data collected in the present review indicate that vanadium cannot be excluded as a factor playing a pivotal role in the etiopathogenesis of neurodegenerative illnesses, and point to the need for additional extensive epidemiological studies that will provide more evidence supporting the relationship between vanadium exposure and neurodegeneration in humans. Simultaneously, the reviewed data, clearly showing the environmental impact of vanadium on health, suggest that more attention should be paid to chronic diseases related to vanadium and to the assessment of the dose-response relationship.
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Affiliation(s)
- Agnieszka Ścibior
- Laboratory of Oxidative Stress, Department of Biomedicine and Environmental Research, Institute of Biological Sciences, Faculty of Medicine, The John Paul II Catholic University of Lublin, Konstantynów St. 1J, 20-708 Lublin, Poland
| | - Juan Llopis
- Department of Physiology, Institute of Nutrition and Food Technology ''José Mataix", Biomedical Research Centre, University of Granada, 18100 Armilla, Spain
- Sport and Health Research Centre, University of Granada, 18016 Granada, Spain
| | - Paweł Piotr Dobrakowski
- Psychology Institute, Humanitas University in Sosnowiec, Jana Kilińskiego St. 43, 41-200 Sosnowiec, Poland
| | - Tomasz Męcik-Kronenberg
- Department of Pathomorphology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 3 Maja St. 13, 41-800 Zabrze, Poland
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6
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Babić Leko M, Langer Horvat L, Španić Popovački E, Zubčić K, Hof PR, Šimić G. Metals in Alzheimer's Disease. Biomedicines 2023; 11:1161. [PMID: 37189779 PMCID: PMC10136077 DOI: 10.3390/biomedicines11041161] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/07/2023] [Accepted: 04/11/2023] [Indexed: 05/17/2023] Open
Abstract
The role of metals in the pathogenesis of Alzheimer's disease (AD) is still debated. Although previous research has linked changes in essential metal homeostasis and exposure to environmental heavy metals to the pathogenesis of AD, more research is needed to determine the relationship between metals and AD. In this review, we included human studies that (1) compared the metal concentrations between AD patients and healthy controls, (2) correlated concentrations of AD cerebrospinal fluid (CSF) biomarkers with metal concentrations, and (3) used Mendelian randomization (MR) to assess the potential metal contributions to AD risk. Although many studies have examined various metals in dementia patients, understanding the dynamics of metals in these patients remains difficult due to considerable inconsistencies among the results of individual studies. The most consistent findings were for Zn and Cu, with most studies observing a decrease in Zn levels and an increase in Cu levels in AD patients. However, several studies found no such relation. Because few studies have compared metal levels with biomarker levels in the CSF of AD patients, more research of this type is required. Given that MR is revolutionizing epidemiologic research, additional MR studies that include participants from diverse ethnic backgrounds to assess the causal relationship between metals and AD risk are critical.
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Affiliation(s)
- Mirjana Babić Leko
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
| | - Lea Langer Horvat
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
| | - Ena Španić Popovački
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
| | - Klara Zubčić
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
| | - Patrick R. Hof
- Nash Family Department of Neuroscience, Friedman Brain Institute and Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Goran Šimić
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
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Babić Leko M, Mihelčić M, Jurasović J, Nikolac Perković M, Španić E, Sekovanić A, Orct T, Zubčić K, Langer Horvat L, Pleić N, Kiđemet-Piskač S, Vogrinc Ž, Pivac N, Diana A, Borovečki F, Hof PR, Šimić G. Heavy Metals and Essential Metals Are Associated with Cerebrospinal Fluid Biomarkers of Alzheimer's Disease. Int J Mol Sci 2022; 24:467. [PMID: 36613911 PMCID: PMC9820819 DOI: 10.3390/ijms24010467] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/19/2022] [Accepted: 12/21/2022] [Indexed: 12/29/2022] Open
Abstract
Various metals have been associated with the pathogenesis of Alzheimer's disease (AD), principally heavy metals that are environmental pollutants (such as As, Cd, Hg, and Pb) and essential metals whose homeostasis is disturbed in AD (such as Cu, Fe, and Zn). Although there is evidence of the involvement of these metals in AD, further research is needed on their mechanisms of toxicity. To further assess the involvement of heavy and essential metals in AD pathogenesis, we compared cerebrospinal fluid (CSF) AD biomarkers to macro- and microelements measured in CSF and plasma. We tested if macro- and microelements' concentrations (heavy metals (As, Cd, Hg, Ni, Pb, and Tl), essential metals (Na, Mg, K, Ca, Fe, Co, Mn, Cu, Zn, and Mo), essential non-metals (B, P, S, and Se), and other non-essential metals (Al, Ba, Li, and Sr)) are associated with CSF AD biomarkers that reflect pathological changes in the AD brain (amyloid β1-42, total tau, phosphorylated tau isoforms, NFL, S100B, VILIP-1, YKL-40, PAPP-A, and albumin). We used inductively coupled plasma mass spectroscopy (ICP-MS) to determine macro- and microelements in CSF and plasma, and enzyme-linked immunosorbent assays (ELISA) to determine protein biomarkers of AD in CSF. This study included 193 participants (124 with AD, 50 with mild cognitive impairment, and 19 healthy controls). Simple correlation, as well as machine learning algorithms (redescription mining and principal component analysis (PCA)), demonstrated that levels of heavy metals (As, Cd, Hg, Ni, Pb, and Tl), essential metals (Ca, Co, Cu, Fe, Mg, Mn, Mo, Na, K, and Zn), and essential non-metals (P, S, and Se) are positively associated with CSF phosphorylated tau isoforms, VILIP-1, S100B, NFL, and YKL-40 in AD.
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Affiliation(s)
- Mirjana Babić Leko
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
- Department of Medical Biology, University of Split School of Medicine, 21000 Split, Croatia
| | - Matej Mihelčić
- Department of Mathematics, University of Zagreb Faculty of Science, 10000 Zagreb, Croatia
| | - Jasna Jurasović
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia
| | | | - Ena Španić
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
| | - Ankica Sekovanić
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia
| | - Tatjana Orct
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia
| | - Klara Zubčić
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
| | - Lea Langer Horvat
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
| | - Nikolina Pleić
- Department of Medical Biology, University of Split School of Medicine, 21000 Split, Croatia
| | | | - Željka Vogrinc
- Laboratory for Neurobiochemistry, Department of Laboratory Diagnostics, University Hospital Centre Zagreb, 10000 Zagreb, Croatia
| | - Nela Pivac
- Ruđer Bošković Institute, Division of Molecular Medicine, 10000 Zagreb, Croatia
| | - Andrea Diana
- Laboratory of Neurogenesis and Neuropoiesis, Department of Biomedical Sciences, University of Cagliari, Monserrato, 09042 Cagliari, Italy
| | - Fran Borovečki
- Department for Functional Genomics, Center for Translational and Clinical Research, University of Zagreb Medical School, University Hospital Center Zagreb, 10000 Zagreb, Croatia
| | - Patrick R. Hof
- Nash Family Department of Neuroscience, Friedman Brain Institute, Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Goran Šimić
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
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Okumura H, Kawasaki T, Nakamura K. Probing protein misfolding and dissociation with an infrared free-electron laser. Methods Enzymol 2022; 679:65-96. [PMID: 36682873 DOI: 10.1016/bs.mie.2022.08.047] [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: 12/24/2022]
Abstract
Misfolding is observed in the mutant proteins that are causative for neurodegenerative disorders such as polyglutamine diseases. These proteins are prone to aggregate in the cytoplasm and nucleus of cells. To reproduce cells with the aggregated proteins, gene expression system is usually applied, in which the expression construct having the mutated DNA sequence of the interest is transfected into cells. The transfected DNA is finally converted into the mutant protein, which is gradually aggregated in the cells. In addition, a simple method to prepare the cells having aggregates inside has been recently applied. Peptides were first aggregated by incubating them in water. The aggregates are spontaneously taken up by cells because aggregated proteins generally transfer between cells. Peptides with different degrees of aggregation can be made by changing the incubation times and temperatures, which enables to examine contribution of aggregation to the toxicity to the recipient cells. Moreover, such cells can be used for therapeutic researches of diseases in which aggregates are involved. In this chapter, we show methods to induce aggregation of peptides. The functional analyses of the cells with aggregates are also described. Then, experimental dissociation of the aggregates produced using this method by mid infrared free electron laser irradiation and its theoretical support by molecular dynamics simulation are introduced as the therapeutic research for neurodegenerative disorders.
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Affiliation(s)
- Hisashi Okumura
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Okazaki, Aichi, Japan; Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki, Aichi, Japan; Department of Structural Molecular Science, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi, Japan
| | - Takayasu Kawasaki
- Accelerator Laboratory, High Energy Accelerator Research Organization, Tsukuba, Ibaraki, Japan
| | - Kazuhiro Nakamura
- Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Maebashi, Gunma, Japan.
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Strumylaite L, Kregzdyte R, Kucikiene O, Baranauskiene D, Simakauskiene V, Naginiene R, Damuleviciene G, Lesauskaite V, Zemaitiene R. Alzheimer's Disease Association with Metals and Metalloids Concentration in Blood and Urine. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19127309. [PMID: 35742553 PMCID: PMC9224238 DOI: 10.3390/ijerph19127309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/10/2022] [Accepted: 06/11/2022] [Indexed: 02/01/2023]
Abstract
As there is some evidence that the risk for Alzheimer’s disease (AD) is partially attributable to environmental exposure to some metals and metalloids, we examined an association between AD and arsenic, chromium, and selenium in 53 AD patients and 217 controls. Urinary arsenic, blood chromium, and selenium were determined by inductively coupled plasma mass spectrometry. Logistic regression models calculating odds ratios (ORs) and 95% confidence intervals (CI) were used to estimate AD association with arsenic, chromium, and selenium. In AD patients, urinary arsenic and blood chromium were significantly higher, while blood selenium was significantly lower compared to controls. Increased blood selenium was related to a significant decrease in the odds of AD after adjustment for risk factors. Blood selenium per 1 kg × 10−9/m3 × 10−4 increment was associated with 1.4 times lower risk of AD (OR = 0.71; 95% CI 0.58–0.87). A significant increase in the odds of AD associated with increased blood chromium was also seen in the adjusted model: the OR per 1 kg × 10−9/m3 × 10−3 chromium increment was 2.39 (95% CI 1.32–4.31). The association of urinary arsenic with the risk of AD was not significant. The data obtained provide evidence that selenium reduces the risk of Alzheimer’s disease, while chromium increases it.
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Affiliation(s)
- Loreta Strumylaite
- Neuroscience Institute, Medical Academy, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania; (R.K.); (D.B.); (V.S.); (R.N.)
- Correspondence: ; Tel.: +370-37-302948
| | - Rima Kregzdyte
- Neuroscience Institute, Medical Academy, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania; (R.K.); (D.B.); (V.S.); (R.N.)
| | - Odeta Kucikiene
- Department of Geriatrics, Medical Academy, Lithuanian University of Health Science, LT-44307 Kaunas, Lithuania; (O.K.); (G.D.); (V.L.)
| | - Dale Baranauskiene
- Neuroscience Institute, Medical Academy, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania; (R.K.); (D.B.); (V.S.); (R.N.)
| | - Vaida Simakauskiene
- Neuroscience Institute, Medical Academy, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania; (R.K.); (D.B.); (V.S.); (R.N.)
| | - Rima Naginiene
- Neuroscience Institute, Medical Academy, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania; (R.K.); (D.B.); (V.S.); (R.N.)
| | - Gyte Damuleviciene
- Department of Geriatrics, Medical Academy, Lithuanian University of Health Science, LT-44307 Kaunas, Lithuania; (O.K.); (G.D.); (V.L.)
| | - Vita Lesauskaite
- Department of Geriatrics, Medical Academy, Lithuanian University of Health Science, LT-44307 Kaunas, Lithuania; (O.K.); (G.D.); (V.L.)
| | - Reda Zemaitiene
- Department of Ophthalmology, Medical Academy, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania;
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