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Liao GY, Xu H, Shumate J, Scampavia L, Spicer T, Xu B. High throughput assay for compounds that boost BDNF expression in neurons. SLAS DISCOVERY : ADVANCING LIFE SCIENCES R & D 2023; 28:88-94. [PMID: 36842668 PMCID: PMC10759152 DOI: 10.1016/j.slasd.2023.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/30/2023] [Accepted: 02/21/2023] [Indexed: 02/27/2023]
Abstract
Deficiencies in brain-derived neurotrophic factor (BDNF) have been linked to several brain disorders, making compounds that can boost neuronal BDNF synthesis attractive as potential therapeutics. However, a sensitive and quantitative BDNF assay for high-throughput screening (HTS) is still missing. Here we report the generation of a new mouse Bdnf allele, BdnfNLuc, in which the sequence encoding nano luciferase (NLuc) is inserted into the Bdnf locus immediately before the stop codon so that the allele will produce a BDNF-NLuc fusion protein. BDNF-NLuc protein appears to function like BDNF as BdnfNLuc/NLuc homozygous mice grew and behaved almost normally. We were able to establish and optimize cultures of cortical and hippocampal BdnfNLuc/+ neurons isolated from mouse embryos in 384-well plates. We used the cultures as a phenotypic assay to detect the ability of 10 mM KCl to stimulate BDNF synthesis and achieved a reproducible Z' factor > 0.50 for the assay, a measure considered suitable for HTS. We successfully scaled up the assay to screen the 1280-compound LOPAC library (Library of Pharmacologically Active Compounds). The screen identified several BDNF-boosting compounds, one of which is Bay K8644, a L-type voltage-gated calcium channel (L-VGCC) agonist, which was previously shown to stimulate BDNF synthesis. These results indicate that our phenotypic neuronal assay is ready for HTS to identify novel BDNF-boosting compounds.
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Affiliation(s)
- Guey-Ying Liao
- Department of Neuroscience, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, 130 Scripps Way, Jupiter, FL 33458, USA
| | - Haifei Xu
- Department of Neuroscience, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, 130 Scripps Way, Jupiter, FL 33458, USA
| | - Justin Shumate
- Department of Molecular Medicine, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, 130 Scripps Way, Jupiter, FL 33458, USA
| | - Louis Scampavia
- Department of Molecular Medicine, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, 130 Scripps Way, Jupiter, FL 33458, USA
| | - Timothy Spicer
- Department of Molecular Medicine, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, 130 Scripps Way, Jupiter, FL 33458, USA
| | - Baoji Xu
- Department of Neuroscience, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, 130 Scripps Way, Jupiter, FL 33458, USA.
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Banerjee M, Shenoy RR. Emphasizing roles of BDNF promoters and inducers in Alzheimer's disease for improving impaired cognition and memory. J Basic Clin Physiol Pharmacol 2023; 34:125-136. [PMID: 34751526 DOI: 10.1515/jbcpp-2021-0182] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 10/11/2021] [Indexed: 12/13/2022]
Abstract
Brain-derived neurotrophic factor (BDNF) is a crucial neurotrophic factor adding to neurons' development and endurance. The amount of BDNF present in the brain determines susceptibility to various neurodegenerative diseases. In Alzheimer's disease (AD), often it is seen that low levels of BDNF are present, which primarily contributes to cognition deficit by regulating long-term potentiation (LTP) and synaptic plasticity. Molecular mechanisms underlying the synthesis, storage and release of BDNF are widely studied. New molecules are found, which contribute to the signal transduction pathway. Two important receptors of BDNF are TrkB and p75NTR. When BDNF binds to the TrkB receptor, it activates three main signalling pathways-phospholipase C, MAPK/ERK, PI3/AKT. BDNF holds an imperative part in LTP and dendritic development, which are essential for memory formation. BDNF supports synaptic integrity by influencing LTP and LTD. This action is conducted by modulating the glutamate receptors; AMPA and NMDA. This review paper discusses the aforesaid points along with inducers of BDNF. Drugs and herbals promote neuroprotection by increasing the hippocampus' BDNF level in various disease-induced animal models for neurodegeneration. Advancement in finding pertinent molecules contributing to the BDNF signalling pathway has been discussed, along with the areas that require further research and study.
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Affiliation(s)
- Madhuparna Banerjee
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Udupi District, Karnataka, India
| | - Rekha R Shenoy
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Udupi District, Karnataka, India
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Souza MF, Medeiros KAAL, Lins LCRF, Bispo JMM, Gois AM, Santos ER, Almeida-Souza TH, Melo JEC, Franco HS, Silva RS, Pereira-Filho EA, Freire MAM, Santos JR. Motor, memory, and anxiety-like behavioral impairments associated with brain-derived neurotrophic factor and dopaminergic imbalance after inhalational exposure to deltamethrin. Brain Res Bull 2022; 181:55-64. [PMID: 35041849 DOI: 10.1016/j.brainresbull.2022.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 12/16/2022]
Abstract
Believed to cause damage to the nervous system and possibly being associated with neurodegenerative diseases, deltamethrin (DM) is a type II pyrethroid used in pest control, public health, home environment, and vector control. The objective of this study was to evaluate the motor, cognitive and emotional changes associated with dopaminergic and BDNF imbalance after DM exposure in rats. Sixty Wistar rats (9-10 months-old) were used, under Ethics Committee on Animal Research license (ID 19/2017). The animals were randomly divided into four groups: control (CTL, 0.9% saline), DM2 (2mg DM in 1.6mL 0.9% saline), DM4 (4mg of DM in 1.6mL of 0.9% saline), and DM8 (8mg of DM in 1.6mL of 0.9% saline). DM groups were submitted to 9 or 15 inhalations, one every 48hours. Half of the animals from each group were randomly selected and perfused 24hours after the 9th or 15th inhalation. Throughout the experiment, the animal's behavior were evaluated using catalepsy test, open field, hole-board test, Modified Elevated Plus Maze, and social interaction. At the end of the experiments, the rats were perfused transcardially and their brains were processed for Tyrosine Hydroxylase (TH) and Brain derived neurotrophic factor (BDNF) immunohistochemistries. The animals submitted to 9 inhalations of DM showed a reduction in immunoreactivity for TH in the Substantia nigra pars compacta (SNpc), ventral tegmental area (VTA), and dorsal striatum (DS) areas, and an increase in BDNF in the DS and CA1, CA3 and dentate gyrus (DG) hippocampal areas. Conversely, the animals submitted to 15 inhalations of DM showed immunoreactivity reduced for TH in the SNpc and VTA, and an increase in BDNF in the hippocampal areas (CA3 and DG). Our results indicate that the DM inhalation at different periods induce motor and cognitive impairments in rats. Such alterations were accompanied by dopaminergic system damage and a possible dysfunction on synaptic plasticity.
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Affiliation(s)
- Marina F Souza
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Katty A A L Medeiros
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Lívia C R F Lins
- Laboratory of Behavioral and Evolutionary Neurobiology, Department of Biosciences, Federal University of Sergipe, Itabaiana, SE, Brazil
| | - José M M Bispo
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Auderlan M Gois
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Edson R Santos
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Thiago H Almeida-Souza
- Laboratory of Behavioral and Evolutionary Neurobiology, Department of Biosciences, Federal University of Sergipe, Itabaiana, SE, Brazil
| | - João E C Melo
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Heitor S Franco
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Rodolfo S Silva
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Eduardo A Pereira-Filho
- Laboratory of Behavioral and Evolutionary Neurobiology, Department of Biosciences, Federal University of Sergipe, Itabaiana, SE, Brazil
| | - Marco Aurelio M Freire
- Graduate Program in Health and Society, University of the State of Rio Grande do Norte, Mossoró/RN, Brazil
| | - José R Santos
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil.
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Souza MF, Medeiros KAAL, Lins LCRF, Bispo JMM, Gois AM, Freire MAM, Marchioro M, Santos JR. Intracerebroventricular injection of deltamethrin increases locomotion activity and causes spatial working memory and dopaminergic pathway impairment in rats. Brain Res Bull 2019; 154:1-8. [PMID: 31606407 DOI: 10.1016/j.brainresbull.2019.10.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 09/18/2019] [Accepted: 10/05/2019] [Indexed: 12/14/2022]
Abstract
Deltamethrin (DM) is widely used in agriculture, veterinary medicine and control of domestic pests. Epidemiological studies suggest that DM exposure is a risk factor for neurodegenerative disorders such as Parkinson's (PD) and Alzheimer diseases; however the mechanisms are elusive. In the present study we evaluated the effects of intracerebroventricular (i.c.v.) administration of DM on locomotion activity, spatial working memory and dopaminergic pathway in the rat. Middle-aged male Wistar rats received three i.c.v. injections of DM 0.5 μg, DM 5 μg or vehicle, every other day. Across the treatment, the animals were submitted to behavioral evaluation in the catalepsy test, open field test, and spontaneous alternation task. Following completion of behavioral tests, rats were perfused and their brains were processed to tyrosine hydroxylase (TH) immunohistochemistry. We observed that i.c.v. administration of DM 5 μg increased locomotion activity (open field) and caused spatial working memory impairment (spontaneous alternation task). These alterations were accompanied by reduction TH immunoreactivity in the substantia nigra pars compacta (SNpc), ventral tegmental area (VTA) and dorsal striatum. Conversely, no motor change was observed in the catalepsy test. These results indicate that i.c.v. administration of DM can cause hyperactivity and cognitive alteration which may be related to disruption of the dopaminergic pathway.
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Affiliation(s)
- Marina F Souza
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil; Laboratory of Behavioral and Evolutionary Neurobiology, Department of Biosciences, Federal University of Sergipe, Itabaiana, SE, Brazil
| | - Katty Anne A L Medeiros
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil; Laboratory of Behavioral and Evolutionary Neurobiology, Department of Biosciences, Federal University of Sergipe, Itabaiana, SE, Brazil
| | - Lívia C R F Lins
- Department of Health Education, Federal University of Sergipe, Lagarto, SE, Brazil
| | - José M M Bispo
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil; Laboratory of Behavioral and Evolutionary Neurobiology, Department of Biosciences, Federal University of Sergipe, Itabaiana, SE, Brazil
| | - Auderlan M Gois
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil; Laboratory of Behavioral and Evolutionary Neurobiology, Department of Biosciences, Federal University of Sergipe, Itabaiana, SE, Brazil
| | - Marco Aurelio M Freire
- Post Graduation Program in Health and Society, University of the State of Rio Grande do Norte, Mossoró, RN, Brazil; New Hope Faculty of Mossoró, RN, Brazil
| | - Murilo Marchioro
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil; Laboratory of Behavioral and Evolutionary Neurobiology, Department of Biosciences, Federal University of Sergipe, Itabaiana, SE, Brazil
| | - José R Santos
- Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil; Laboratory of Behavioral and Evolutionary Neurobiology, Department of Biosciences, Federal University of Sergipe, Itabaiana, SE, Brazil.
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Chu C, Zhang H, Cui S, Han B, Zhou L, Zhang N, Su X, Niu Y, Chen W, Chen R, Zhang R, Zheng Y. Ambient PM2.5 caused depressive-like responses through Nrf2/NLRP3 signaling pathway modulating inflammation. JOURNAL OF HAZARDOUS MATERIALS 2019; 369:180-190. [PMID: 30776601 DOI: 10.1016/j.jhazmat.2019.02.026] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 02/06/2019] [Accepted: 02/08/2019] [Indexed: 05/05/2023]
Abstract
PM2.5 pollution has been associated with numerous adverse effects including cardiovascular, respiratory and metabolic diseases as well as emotional disorders. However, the potential mechanism has not known clearly. Twenty-four rats were divided into 3 groups and exposed to various airs: filtered air (FA), unfiltered air (UA) and concentrated PM2.5 air (CA), respectively. Thirty wild type (WT) and 30 Nrf2 knockout (KO) mice were divided into 2 groups and exposed to FA and UA, respectively. The changes of neurobehavioral function, neurotransmitter secretion, toxic elements deposition, oxidative stress and the inflammation in prefrontal cortex were investigated during 9-12 weeks with/without PM2.5 exposure. Results showed that CA rats and KO-UA mice emerged obviously depressive-like responses. Li, Be, Al, Cr, Co, Ni, Se, Cd, Ba, Ti and Pb could deposit in the prefrontal cortex of rats after PM2.5 exposure. The neurotransmitters were significantly disorder in prefrontal cortex of CA rats. The NLRP3 signaling pathway was more activated in Nrf2-/- than WT mice after PM2.5 exposure for 9 weeks. Nrf2/ NLRP3 signaling pathway modulating the inflammation might play an important role in the depression induced by ambient PM2.5.
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Affiliation(s)
- Chen Chu
- Department of Toxicology, Hebei Medical University, Shijiazhuang, 050017, PR China
| | - Haiya Zhang
- Deportment Occupational Health and Environmental Health, Hebei Medical University, Shijiazhuang, 050017, PR China
| | - Shijie Cui
- Hebei Province Key Laboratory of Environment and Human Health, Shijiazhuang, 050017, PR China
| | - Bin Han
- Department of Toxicology, Hebei Medical University, Shijiazhuang, 050017, PR China
| | - Lixiao Zhou
- Department of Toxicology, Hebei Medical University, Shijiazhuang, 050017, PR China
| | - Ning Zhang
- Department of Toxicology, Hebei Medical University, Shijiazhuang, 050017, PR China
| | - Xuan Su
- Department of Toxicology, Hebei Medical University, Shijiazhuang, 050017, PR China
| | - Yujie Niu
- Deportment Occupational Health and Environmental Health, Hebei Medical University, Shijiazhuang, 050017, PR China; Hebei Province Key Laboratory of Environment and Human Health, Shijiazhuang, 050017, PR China
| | - Wen Chen
- Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, PR China
| | - Rui Chen
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Dingjiaqiao 87, Nanjing, 210009, PR China
| | - Rong Zhang
- Department of Toxicology, Hebei Medical University, Shijiazhuang, 050017, PR China; Hebei Province Key Laboratory of Environment and Human Health, Shijiazhuang, 050017, PR China.
| | - Yuxin Zheng
- Department of Toxicology, Public Health College, Qingdao University, 266000, Qingdao, PR China.
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AS1949490, an inhibitor of 5′-lipid phosphatase SHIP2, promotes protein kinase C-dependent stabilization of brain-derived neurotrophic factor mRNA in cultured cortical neurons. Eur J Pharmacol 2019; 851:69-79. [DOI: 10.1016/j.ejphar.2019.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 02/04/2019] [Accepted: 02/08/2019] [Indexed: 12/11/2022]
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Izumi H, Ishimoto T, Yamamoto H, Mori H. Bioluminescence imaging of Arc expression in mouse brain under acute and chronic exposure to pesticides. Neurotoxicology 2019; 71:52-59. [DOI: 10.1016/j.neuro.2018.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 11/27/2018] [Accepted: 12/13/2018] [Indexed: 11/28/2022]
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Chrustek A, Hołyńska-Iwan I, Dziembowska I, Bogusiewicz J, Wróblewski M, Cwynar A, Olszewska-Słonina D. Current Research on the Safety of Pyrethroids Used as Insecticides. MEDICINA (KAUNAS, LITHUANIA) 2018; 54:E61. [PMID: 30344292 PMCID: PMC6174339 DOI: 10.3390/medicina54040061] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/22/2018] [Accepted: 08/24/2018] [Indexed: 12/15/2022]
Abstract
Pyrethroids are synthetic derivatives of natural pyrethrins extracted from Chrysanthemum cinerariaefolium. They are 2250 times more toxic to insects than to vertebrates due to insects' smaller size, lower body temperature and more sensitive sodium channels. In particular, three pyrethroid compounds, namely deltamethrin, permethrin, and alpha-cypermethrin, are commonly used as insecticides and are recommended for in-home insect control because they are considered to be relatively non-toxic to humans in all stages of life. However, recent data show that they are not completely harmless to human health as they may enter the body through skin contact, by inhalation and food or water, and absorption level depending on the type of food. Permethrin seems to have an adverse effect on fertility, the immune system, cardiovascular and hepatic metabolism as well as enzymatic activity. Deltamethrin induces inflammation, nephro- and hepatotoxicity and influences the activity of antioxidant enzymes in tissues. Alpha-cypermethrin may impair immunity and act to increase glucose and lipid levels in blood. The aim of the review is to provide comprehensive information on potential hazards associated to human exposure to deltamethrin, permethrin and alpha-cypermethrin. The results of presented studies prove that the insecticides must be used with great caution.
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Affiliation(s)
- Agnieszka Chrustek
- Department of Pathobiochemistry and Clinical Chemistry, Faculty of Pharmacy, L. Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, 85-094 Torun, Poland.
| | - Iga Hołyńska-Iwan
- Department of Pathobiochemistry and Clinical Chemistry, Faculty of Pharmacy, L. Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, 85-094 Torun, Poland.
| | - Inga Dziembowska
- Department of Pathophysiology, Faculty of Pharmacy, L. Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, 85-094 Torun, Poland.
| | - Joanna Bogusiewicz
- Department of Pharmacodynamics and Molecular Pharmacology, Faculty of Pharmacy, L. Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, 85-089 Torun, Poland.
| | - Marcin Wróblewski
- Department of Medical Biology and Biochemistry, Faculty of Medicine, L. Rydygier Collegium Medicum of Nicolaus Copernicus University, 85-092 Torun, Poland.
| | - Anna Cwynar
- Department of Pathobiochemistry and Clinical Chemistry, Faculty of Pharmacy, L. Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, 85-094 Torun, Poland.
| | - Dorota Olszewska-Słonina
- Department of Pathobiochemistry and Clinical Chemistry, Faculty of Pharmacy, L. Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, 85-094 Torun, Poland.
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Özdemir S, Altun S, Özkaraca M, Ghosi A, Toraman E, Arslan H. Cypermethrin, chlorpyrifos, deltamethrin, and imidacloprid exposure up-regulates the mRNA and protein levels of bdnf and c-fos in the brain of adult zebrafish (Danio rerio). CHEMOSPHERE 2018; 203:318-326. [PMID: 29626809 DOI: 10.1016/j.chemosphere.2018.03.190] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Revised: 03/27/2018] [Accepted: 03/28/2018] [Indexed: 06/08/2023]
Abstract
The aim of the present study is to investigate the toxicity effects of frequently used pesticides, involving cypermethrin, deltamethrin, chlorpyrifos and imidacloprid, on the expression of bdnf and c-fos genes in zebrafish brain tissues. Therefore, brain tissues exposed to intoxication was primarily analyzed by indirect immunofluorescence assay. Afterwards, the mRNA transcription levels of BNDF and c-fos genes and the protein levels were measured by qRT-PCR and Western blotting, respectively. The data of the immunofluorescence assay revealed intensive immunopositivity for bdnf and c-fos genes in the tissues exposed to pesticide intoxication in comparison to the control group (p<0.05). Moreover, the transcription levels of BNDF and c-fos genes, and protein levels were elevated following the intoxication (p<0.05, p<0.01, and p<0.001, respectively). These results showed that the exposure to the acute cypermethrin, deltamethrin, chlorpyrifos and imidacloprid intoxication disrupted the normal neuronal activity, resulting in neurotoxic effect, also DNA-binding Increasing c-fos activation, an oncoprotein from the family of the Nuclear Proteins, is also true of the knowledge that these chemicals are oncogenic in zebrafish brain tissues. Thus, the use of these pesticides poses a potential neuronal and oncogenic risk to the non-target organisms.
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Affiliation(s)
- Selçuk Özdemir
- Department of Genetics, Faculty of Veterinary Medicine, Atatürk University, Yakutiye, 25240, Erzurum, Turkey.
| | - Serdar Altun
- Department of Pathology, Faculty of Veterinary Medicine, Atatürk University, Yakutiye, 25240, Erzurum, Turkey
| | - Mustafa Özkaraca
- Department of Pathology, Faculty of Veterinary Medicine, Atatürk University, Yakutiye, 25240, Erzurum, Turkey
| | - Atena Ghosi
- Department of Molecular Biology and Genetics, Faculty of Science, Atatürk University, Yakutiye, 25240, Erzurum, Turkey
| | - Emine Toraman
- Department of Molecular Biology and Genetics, Faculty of Science, Atatürk University, Yakutiye, 25240, Erzurum, Turkey
| | - Harun Arslan
- Department of Basic Sciences, Faculty of Fisheries, Atatürk University, Yakutiye, 25240, Erzurum, Turkey
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Campos Ÿ, dos Santos Pinto da Silva V, Sarpa Campos de Mello M, Barros Otero U. Exposure to pesticides and mental disorders in a rural population of Southern Brazil. Neurotoxicology 2016; 56:7-16. [DOI: 10.1016/j.neuro.2016.06.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 05/26/2016] [Accepted: 06/01/2016] [Indexed: 12/29/2022]
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Abstract
My former research focused on silk fibroin gene transcription. The in vivo transcription initiation site of the fibroin gene, which is similar to the site corresponding to the 5'-terminal of mature fibroin mRNA, was determined. By developing a cell-free transcription system prepared from silk glands, it was found that the upstream region of the fibroin gene is responsible for efficient transcription initiation, which has enhancer-like features. More recent research has switched my focus to cellular neurobiology to understand the molecular mechanisms of long-term memory at the level of gene expression in terms of cell differentiation. I first developed an experimental system to analyze promoter activity in primary cultured neuronal cells. Particularly focusing on the transcription regulation of the brain-derived neurotrophic factor (BDNF) gene (Bdnf), I found that the interaction of the cAMP response element-binding protein (CREB) with the CRE sequence is important for the activity-dependent activation of the Bdnf promoter. In addition, this activity-dependent transcriptional regulation occurs in cultured neurons stimulated with excitatory GABAergic inputs, which plays a critical role in promoting the step of neuronal differentiation. Finally, I found that stimulation of the G-protein coupled receptor (GPCR) effectively activates Bdnf promoter IV through selective activation of the calcineurin pathway, irrespective of the type of GPCR if the protein kinase A or C pathway is activated. This induction mechanism appears important to understand intracellular mechanisms evoked via simultaneous neurotransmission of excitatory and modulatory inputs into neurons of the brain.
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Affiliation(s)
- Masaaki Tsuda
- Laboratory of Molecular Neurobiology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama
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12
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Wang Q, Xia X, Deng X, Li N, Wu D, Zhang L, Yang C, Tao F, Zhou J. Lambda-cyhalothrin disrupts the up-regulation effect of 17β-estradiol on post-synaptic density 95 protein expression via estrogen receptor α-dependent Akt pathway. J Environ Sci (China) 2016; 41:252-260. [PMID: 26969072 DOI: 10.1016/j.jes.2015.04.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 03/30/2015] [Accepted: 04/02/2015] [Indexed: 06/05/2023]
Abstract
Lambda-cyhalothrin (LCT), one of the type II pyrethroids, has been widely used throughout the world. The estrogenic effect of LCT to increase cell proliferation has been well established. However, whether the estrogenic effect of LCT will influence neurodevelopment has not been investigated. In addition, 17β-Estradiol (E2) plays a crucial role in neurodevelopment and induces an increase in synaptic proteins. The post-synaptic density 95 (PSD95) protein, which is involved in the development of the structure and function of new spines and localized with estrogen receptor α (ERα) at the post-synaptic density (PSD), was detected in our study by using hippocampal neuron cell line HT22. We found that LCT up-regulated PSD95 and ERα expression, estrogen receptor (ER) antagonist ICI182,780 and phosphatidylinositol-4; 5-bisphosphate 3-kinase (PI3K) inhibitor LY294,002 blocked this effect. In addition, LCT disrupted the promotion effect of E2 on PSD95. To investigate whether the observed changes are caused by ERα-dependent signaling activation, we next detected the effects of LCT on the ERα-mediated PI3K-Protein kinase B (PKB/Akt)-eukaryotic initiation factor (eIF) 4E-binding protein 1 (4E-BP1) pathway. There existed an activation of Akt and the downstream factor 4E-BP1 after LCT treatment. In addition, LCT could disrupt the activation effect of E2 on the Akt pathway. However, no changes in cAMP response element-binding protein (CREB) activation and PSD95 messenger ribonucleic acid (mRNA) were observed. Our findings demonstrated that LCT could increase the PSD95 protein level via the ERα-dependent Akt pathway, and LCT might disrupt the up-regulation effect of E2 on PSD95 protein expression via this signaling pathway.
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Affiliation(s)
- Qunan Wang
- Chinese Academy of Science Key Laboratory of Brain Function and Diseases, School of Life Sciences, University of Science and Technology of China, Hefei 230027, Anhui, China; Department of Toxicology, College of Public Health, Anhui Medical University, Hefei 230032, China.
| | - Xin Xia
- Department of Toxicology, College of Public Health, Anhui Medical University, Hefei 230032, China
| | - Xiaomei Deng
- Department of Pharmacy, Affiliated Anhui Provincial Hospital, Anhui Medical University, Hefei 230001, China
| | - Nian Li
- Department of Toxicology, College of Public Health, Anhui Medical University, Hefei 230032, China
| | - Daji Wu
- Department of Toxicology, College of Public Health, Anhui Medical University, Hefei 230032, China
| | - Long Zhang
- Department of Toxicology, College of Public Health, Anhui Medical University, Hefei 230032, China
| | - Chengwei Yang
- Department of Toxicology, College of Public Health, Anhui Medical University, Hefei 230032, China
| | - Fangbiao Tao
- Department of Maternal and Child health, College of Public Health, Anhui Medical University, Hefei 230032, China
| | - Jiangning Zhou
- Chinese Academy of Science Key Laboratory of Brain Function and Diseases, School of Life Sciences, University of Science and Technology of China, Hefei 230027, Anhui, China.
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Lorenzi C, Pirovano A, Bosia M. Research highlights: highlights from the latest articles on the pharmacogenomics of neuropsychiatric disorders. Pharmacogenomics 2014; 15:735-8. [PMID: 24897281 DOI: 10.2217/pgs.14.23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Cristina Lorenzi
- San Raffaele Scientific Institute, Department of Clinical Neurosciences, Milan, Italy
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14
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Persistent modification of Nav1.9 following chronic exposure to insecticides and pyridostigmine bromide. Toxicol Appl Pharmacol 2014; 277:298-309. [DOI: 10.1016/j.taap.2014.04.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 03/14/2014] [Accepted: 04/03/2014] [Indexed: 12/21/2022]
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