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Kakoti A, Borah J, Sonowal DJ, Devi S, Hazarika UN, Konwer S, Khakhlary P. Solution and gaseous phase sensing of formaldehyde with economical triphenylmethane based sensors: a tool to estimate formaldehyde content in stored fish samples. Analyst 2024; 149:2988-2995. [PMID: 38602359 DOI: 10.1039/d3an02038j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The use of formalin to preserve raw food items such as fish, meat, vegetables etc. is very commonly practiced in the present day. Also, formaldehyde (FA), which is the main constituent of formalin solution, is known to cause serious health issues on exposure. Considering the ill effects of formaldehyde, herein we report synthesis of highly sensitive triphenylmethane based formaldehyde (FA) sensors from a single step reaction of inexpensive reagents namely 4-hydroxy benzaldehyde and 2,6-dimethyl phenol. The synthetic method also provides highly pure product in bulk quantity. The analytical activity of the triphenylmethane sensor 1 with a limit of detection (LOD) value of 2.31 × 10-6 M for FA was significantly enhanced through induced deprotonation and thereafter a LOD value of 1.82 × 10-8 M could be achieved. To the best of our knowledge, the LOD value of the deprotonated form (sensor 2) for FA was superior to those of all the FA optical sensors reported so far. The mechanism of sensing was demonstrated by 1H-NMR titration and recording mass spectra before and after addition of FA to a solution of sensor 2. Both sensor 1 and sensor 2 exhibit quenching in emission upon addition of FA. A fluorescence study also demonstrates enhancement in analytical activity of the sensor upon induced deprotonation. Then the sensor was effectively immobilized into a hydrophilic and biocompatible starch-PVA polymer matrix which enabled detection of FA in a 100% aqueous system reversibly. Again, quick and effective sensing of FA in real food samples (stored fish) with the help of a computational application was demonstrated. The sensors have significant practical applicability as they effectively detect FA in real food samples qualitatively and quantitatively.
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Affiliation(s)
- Arobinda Kakoti
- Department of Chemistry, Dibrugarh University, Dibrugarh, Assam, 786004, India.
| | - Jhorna Borah
- Department of Chemistry, Dibrugarh University, Dibrugarh, Assam, 786004, India.
| | | | - Shrutipriya Devi
- Department of Chemistry, Dibrugarh University, Dibrugarh, Assam, 786004, India.
| | | | - Surajit Konwer
- Department of Chemistry, Dibrugarh University, Dibrugarh, Assam, 786004, India.
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Aydin DD, Taşkınalp O, Uluçam E, Karadağ H, Özfidan GK, Topuz R, Ersoy O. The effect of acute and chronic formaldehyde exposure on learning and memory in male and female rats. Int J Neurosci 2023:1-9. [PMID: 38152865 DOI: 10.1080/00207454.2023.2300728] [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: 07/15/2023] [Accepted: 12/26/2023] [Indexed: 12/29/2023]
Abstract
AIM Formaldehyde is a chemical that lies behind the various systemical failures in organism. Many products that people use contain formaldehyde. Owing to its tissue fixative properties, scientists who work in life sciences are exposed to this substance more than others. Several studies have shown that formaldehyde affects the CA1 and CA3 regions of the hippocampus, which play crucial roles in memory consolidation. In this study, we aimed to investigate anxiety levels and indicate the short and long term effects of formaldehyde and sex-related differences by exposing formaldehyde to male and female rats. MATERIALS AND METHODS Formaldehyde (10 mg/kg) was administered intraperitoneally for 7 days for acute exposure and 30 days for chronic exposure. Cognitive assessment was performed using fear conditioning, elevated plus maze, and Morris water maze tests. TUNEL staining was used to identify apoptosis in the brains obtained after decapitation. RESULTS Exposure to intraperitoneal formaldehyde does not impair learning and memory in acute and chronic periods and has no effect on depression or anxiety. After acute exposure, apoptosis was observed in the hippocampal CA1 and CA3 regions in males. When the cognitive test results were examined, no differences were found between the experimental and control groups. There was also no significant difference between males and females.
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Affiliation(s)
- Didem Dönmez Aydin
- Faculty of Medicine, Department of Anatomy, Trakya University, Edirne, Turkey
| | - Oğuz Taşkınalp
- Faculty of Medicine, Department of Anatomy, Trakya University, Edirne, Turkey
| | - Enis Uluçam
- Faculty of Medicine, Department of Anatomy, Trakya University, Edirne, Turkey
| | - Hakan Karadağ
- Faculty of Medicine Department of Pharmacology, Trakya University, Edirne, Turkey
| | - Gülnur Kızılay Özfidan
- Faculty of Medicine, Department of Histology and Embryology, Trakya University, Edirne, Turkey
| | - Ruhan Topuz
- Faculty of Medicine Department of Pharmacology, Trakya University, Edirne, Turkey
| | - Onur Ersoy
- School of Health Sciences, Trakya University, Edirne, Turkey
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3
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Liang Y, Zhang Y, Li M, Meng Z, Gong S, Du W, Yang Y, Wang Z, Wang S. A camphor-based fluorescent probe with high selectivity and sensitivity for formaldehyde detection in real food samples and living zebrafish. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107305] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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4
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Yang C, Kang B, Cao Z, Zhang J, Zhao F, Wang D, Su P, Chen J. Early-Life Pb Exposure Might Exert Synapse-Toxic Effects Via Inhibiting Synapse-Associated Membrane Protein 2 (VAMP2) Mediated by Upregulation of miR-34b. J Alzheimers Dis 2022; 87:619-633. [DOI: 10.3233/jad-215638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: Early-life Pb exposure can cause behavioral and cognitive problems and induce symptoms of hyperactivity, impulsivity, and inattention in children. Studies showed that blood lead levels were highly correlated with neuropsychiatric disorders, and effects of neurotoxicity might persist and affect the incidence of neurodegenerative diseases, for example Alzheimer’s disease (AD). Objective: To explore possible mechanisms of developmental Pb-induced neuropsychiatric dysfunctions. Methods: Children were divided into low blood lead level (BLL) group (0–50.00μg/L) and high BLL group (> 50.00μg/L) and blood samples were collected. miRNA array was used to testify miRNA expression landscape between two groups. Correlation analysis and real-time PCR were applied to find miRNAs that altered in Pb and neuropsychiatric diseases. Animal models and cell experiments were used to confirm the effect of miRNAs in response to Pb, and siRNA and luciferase experiments were conducted to examine their effect on neural functions. Results: miRNA array data and correlation analysis showed that miR-34b was the most relevant miRNA among Pb neurotoxicity and neuropsychiatric disorders, and synapse-associated membrane protein 2 (VAMP2) was the target gene regulating synapse function. In vivo and in vitro studies showed Pb exposure injured rats’ cognitive abilities and induced upregulation of miR-34b and downregulation of VAMP2, resulting in decreases of hippocampal synaptic vesicles. Blockage of miR-34b mitigated Pb’s effects on VAMP2 in vitro. Conclusion: Early-life Pb exposure might exert synapse-toxic effects via inhibiting VAMP2 mediated by upregulation of miR-34b and shed a light on the underlying relationship between Pb neurotoxicity and developmental neuropsychiatric disorders.
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Affiliation(s)
- Changhao Yang
- Medical School of Chinese PLA, Chinese PLA General Hospital, Beijing, China
| | - Beipei Kang
- Department of Clinical Laboratory, Xijing Hospital, Air Force Military Medical University, Xi’an, China
| | - Zipeng Cao
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi’an, China
| | - Jianbin Zhang
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi’an, China
| | - Fang Zhao
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi’an, China
| | - Diya Wang
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi’an, China
| | - Peng Su
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi’an, China
| | - Jingyuan Chen
- Medical School of Chinese PLA, Chinese PLA General Hospital, Beijing, China
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5
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Luminescence turn-on response of naphthalene diimide based chemosensor with Formaldehyde: A novel stratagem for estimation of formaldehyde in storage fish samples. Bioorg Med Chem Lett 2021; 49:128287. [PMID: 34311088 DOI: 10.1016/j.bmcl.2021.128287] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 07/12/2021] [Accepted: 07/20/2021] [Indexed: 01/25/2023]
Abstract
A new strategy has been developed for selective estimation of toxic Formaldehyde (FA) in storage fish samples by a simple chemosensor (BNDI) based on naphthalene diimide core in aqueous medium at neutral pH. The rapid "lightning-up" fluorescence feature of BNDI has been implied to detect and estimate aqueous FA selectively at very low concentration. The chemosensing properties of BNDI with aqueous FA have been established through a unique interaction pattern which is proven by different spectroscopic and theoretical analysis.
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6
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Bi A, Liu M, Huang S, Zheng F, Ding J, Wu J, Tang G, Zeng W. Construction and theoretical insights into the ESIPT fluorescent probe for imaging formaldehyde in vitro and in vivo. Chem Commun (Camb) 2021; 57:3496-3499. [PMID: 33690773 DOI: 10.1039/d1cc00429h] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the first ESIPT-based probe ABTB, for the highly sensitive and selective imaging of formaldehyde (FA). The various theoretical calculations have been systematically performed, and clearly unravel the lighting mechanism of the fluorescent probe for FA. Additionally, the probe was successfully applied in monitoring endogenous FA in the brain of AD mice.
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Affiliation(s)
- Anyao Bi
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410013, P. R. China.
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7
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Li X, Zhuang YY, Wu L, Xie M, Gu HF, Wang B, Tang XQ. Hydrogen Sulfide Ameliorates Cognitive Dysfunction in Formaldehyde-Exposed Rats: Involvement in the Upregulation of Brain-Derived Neurotrophic Factor. Neuropsychobiology 2020; 79:119-130. [PMID: 31550727 DOI: 10.1159/000501294] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 06/04/2019] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To investigate whether hydrogen sulfide (H2S) counteracts formaldehyde (FA)-induced cognitive defects and whether the underlying mechanism is involved in the upregulation of hippocampal brain-derived neurotrophic factor (BDNF) expression. METHODS The cognitive function of rats was evaluated by the Morris water maze (MWM) test and the novel object recognition test. The content of superoxide dismutase (SOD) and malondialdehyde (MDA) in the hippocampus were detected by enzyme-linked immunosorbent assay (ELISA). The neuronal apoptosis in the hippocampal CA1 region was detected by terminal deoxynucleotidyl transferase-mediated dUTP nick-end (TUNEL) staining. The expression of the BDNF protein was detected by Western blot and immunohistochemistry. RESULTS We found that sodium hydrosulfide (NaHS, a donor of H2S) significantly reversed the impairment in the function of learning and memory in the MWM test and the novel objective recognition task induced by intracerebroventricular injection of FA. We also showed that NaHS significantly reduced the level of MDA, elevated the level of SOD, and decreased the amount of TUNEL-positive neurons in the hippocampus of FA-exposed rats. Moreover, NaHS markedly increased the expression of hippocampal BDNF in FA-exposed rats. CONCLUSIONS H2S attenuates FA-induced dysfunction of cognition and the underlying mechanism is involved in the reduction of hippocampal oxidative damage and apoptosis as well as upregulation of hippocampal BDNF.
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Affiliation(s)
- Xiang Li
- Department of Anesthesiology, The First Affiliated Hospital, University of South China, Hengyang, China
| | - Yuan-Yuan Zhuang
- Institute of Neurology, The First Affiliated Hospital, University of South China, Hengyang, China.,Key Laboratory for Cognitive Disorders and Neurodegenerative Diseases, Department of Physiology, Hengyang Medical College, University of South China, Hengyang, China
| | - Lei Wu
- Institute of Neurology, The First Affiliated Hospital, University of South China, Hengyang, China.,Key Laboratory for Cognitive Disorders and Neurodegenerative Diseases, Department of Physiology, Hengyang Medical College, University of South China, Hengyang, China
| | - Ming Xie
- Department of Neurology, The First Affiliated Hospital, University of South China, Hengyang, China
| | - Hong-Feng Gu
- Key Laboratory for Cognitive Disorders and Neurodegenerative Diseases, Department of Physiology, Hengyang Medical College, University of South China, Hengyang, China
| | - Bo Wang
- Department of Anesthesiology, The First Affiliated Hospital, University of South China, Hengyang, China
| | - Xiao-Qing Tang
- Department of Neurology, The First Affiliated Hospital, University of South China, Hengyang, China, .,Institute of Neurology, The First Affiliated Hospital, University of South China, Hengyang, China, .,Key Laboratory for Cognitive Disorders and Neurodegenerative Diseases, Department of Physiology, Hengyang Medical College, University of South China, Hengyang, China,
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8
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Mengwen L, Ao S, Yueqi L, Hao Z, Xiaohui H, Xueliang L, Xinchao S, Yunxu Y. The selective and sensitive detection of formaldehyde by ZIF-90-LWvia aza-Cope rearrangement. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:3748-3755. [PMID: 32779657 DOI: 10.1039/d0ay00493f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Formaldehyde (FA), as one of the simplest reactive carbonyl species (RCS), is widely known as an environmental toxin and carcinogen. In this work, a new ZIF-90 type material (ZIF-90-LW) was synthesized and investigated, which combines the two strategies of "2-aza-Cope rearrangement" and "MOF structure", by the combination of a pre-functionalized 2-allylaminoimidazole ligand and Zn2+ salt under solvothermal conditions. From this, the hurdle of selectivity over other carbonyl compounds (RCS) could be overcome despite their similar electrophilic reactivities to FA, and a prominent fluorescence turn-on type signal was realized through the 2-aza-Cope rearrangement mechanism. A good linear relationship (R2 = 0.9979) was obtained by fitting the fluorescence intensity towards FA from 0 to 25 mM, and the detection limit of ZIF-90-LW for FA was 2.3 μM. In addition, it also showed potentially useful sensing ability for the detection of FA in the gas phase, and might therefore be used to rapidly detect FA with a response time of 28 s in the liquid phase. All of the above features clearly demonstrate that ZIF-90-LW has great potential for sensitive and selective recognition of FA in the environment.
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Affiliation(s)
- Li Mengwen
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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9
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Yang N, Li Z, Han D, Mi X, Tian M, Liu T, Li Y, He J, Kuang C, Cao Y, Li L, Ni C, Wang JQ, Guo X. Autophagy prevents hippocampal α-synuclein oligomerization and early cognitive dysfunction after anesthesia/surgery in aged rats. Aging (Albany NY) 2020; 12:7262-7281. [PMID: 32335546 PMCID: PMC7202547 DOI: 10.18632/aging.103074] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 03/29/2020] [Indexed: 12/13/2022]
Abstract
Stress-induced α-synuclein aggregation, especially the most toxic species (oligomers), may precede synaptic and cognitive dysfunction. Under pathological conditions, α-synuclein is degraded primarily through the autophagic/lysosomal pathway. We assessed the involvement of autophagy in α-synuclein aggregation and cognitive impairment following general anesthesia and surgical stress. Autophagy was found to be suppressed in the aged rat hippocampus after either 4-h propofol anesthesia alone or 2-h propofol anesthesia during a laparotomy surgery. This inhibition of autophagy was accompanied by profound α-synuclein oligomer aggregation and neurotransmitter imbalances in the hippocampus, along with hippocampus-dependent cognitive deficits. These events were not observed 18 weeks after propofol exposure with or without surgical stress. The pharmacological induction of autophagy using rapamycin markedly suppressed α-synuclein oligomerization, restored neurotransmitter equilibrium, and improved cognitive behavior after prolonged anesthesia or anesthesia combined with surgery. Thus, both prolonged propofol anesthesia alone and propofol anesthesia during surgery impaired autophagy, which may have induced abnormal hippocampal α-synuclein aggregation and neurobehavioral deficits in aged rats. These findings suggest that the activation of autophagy and the clearance of pathological α-synuclein oligomers may be novel strategies to ameliorate the common occurrence of postoperative cognitive dysfunction.
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Affiliation(s)
- Ning Yang
- Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, China
| | - Zhengqian Li
- Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, China
| | - Dengyang Han
- Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, China
| | - Xinning Mi
- Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, China
| | - Miao Tian
- Chinese Traditional and Herbal Drugs Editorial Office, Tianjin Institute of Pharmaceutical Research, Tianjin 300193, China
| | - Taotao Liu
- Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, China
| | - Yue Li
- Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, China
| | - Jindan He
- Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, China
| | - Chongshen Kuang
- Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, China
| | - Yiyun Cao
- Department of Anesthesiology, Shanghai Sixth People's Hospital East Affiliated with Shanghai University of Medicine and Health Sciences, Shanghai 200233, China
| | - Lunxu Li
- Department of Anesthesiology, Peking University International Hospital, Beijing 102200, China
| | - Cheng Ni
- Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, China
| | - John Q Wang
- Department of Anesthesiology, University of Missouri Kansas City, School of Medicine, Kansas, MO 64110, USA
| | - Xiangyang Guo
- Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, China
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Chen Y, Zhou CF, Xiao F, Huang HL, Zhang P, Gu HF, Tang XQ. Inhibition of ALDH2 protects PC12 cells against formaldehyde-induced cytotoxicity: involving the protection of hydrogen sulphide. Clin Exp Pharmacol Physiol 2017; 44:595-601. [DOI: 10.1111/1440-1681.12741] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 02/11/2017] [Accepted: 02/23/2017] [Indexed: 01/28/2023]
Affiliation(s)
- Ying Chen
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study; Institute of Pharmacy and Pharmacology; University of South China; Hengyang Hunan China
- Institute of Neuroscience; Medical College; University of South China; Hengyang Hunan China
| | - Cheng-Fang Zhou
- Institute of Neuroscience; Medical College; University of South China; Hengyang Hunan China
| | - Fan Xiao
- Institute of Neuroscience; Medical College; University of South China; Hengyang Hunan China
| | - Hong-Lin Huang
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study; Institute of Pharmacy and Pharmacology; University of South China; Hengyang Hunan China
| | - Ping Zhang
- Department of Neurology; Nanhua Affiliated Hospital; University of South China; Hengyang Hunan China
| | - Hong-Feng Gu
- Institute of Neuroscience; Medical College; University of South China; Hengyang Hunan China
| | - Xiao-Qing Tang
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study; Institute of Pharmacy and Pharmacology; University of South China; Hengyang Hunan China
- Institute of Neuroscience; Medical College; University of South China; Hengyang Hunan China
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Li X, Wang C, Wang W, Yue C, Tang Y. Neonatal exposure to BDE 209 impaired learning and memory, decreased expression of hippocampal core SNAREs and synaptophysin in adult rats. Neurotoxicology 2017; 59:40-48. [PMID: 28104350 DOI: 10.1016/j.neuro.2017.01.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 01/10/2017] [Accepted: 01/10/2017] [Indexed: 12/17/2022]
Abstract
Polybrominated diphenyl ethers (PBDEs) are a class of flame retardants. While the mechanism remains unknown, the potential neurotoxic effects of PBDEs remain a relevant issue. In the present study, neonatal Sprague-Dawley rats of both sexes were administered BDE 209 (1, 10, or 20mg/kg body weight) or peanut oil once daily from postnatal day (PND) 5 to PND 10. We examined the spatial learning and memory by Morris water maze and the working and reference memory by eight-arm radial maze in the stage of adulthood. Compared with controls, significantly longer escape latencies and fewer platform-crossings in the Morris water maze were observed in rats exposed to 1, 10, and 20mg/kg BDE 209, and these effects were dose-dependent. Significantly higher working and reference memory error rates in the eight-arm radial maze were also observed in rats exposed to 10 and 20mg/kg BDE 209. Furthermore, we detected the mRNA and protein expressions of hippocampal synaptobrevin 2, syntaxin 1A, Synaptosome Associated Protein 25 (SNAP-25), and synaptophysin using quantitative reverse transcription-polymerase chain reaction (qRT-PCR) and western blot methods. Compared with controls, the mRNA expressions of synaptobrevin 2, syntaxin 1A, SNAP-25, and synaptophysin were significantly decreased in the hippocampi of rats exposed to 1, 10, and 20 mg/kg BDE 209, and the protein expressions of synaptobrevin 2 and SNAP-25 were significantly decreased in the hippocampi of rats exposed to 10 and 20 mg/kg BDE 209, while syntaxin 1A and synaptophysin were significantly decreased in rats exposed to 1, 10, and 20 mg/kg BDE 209. Alterations that may be involved in the learning and memory deficits induced by BDE 209 reveal the possibility of synapse loss.
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Affiliation(s)
- Xiong Li
- Department of Occupational Medicine, School of Public Health, Southwest Medical University, Luzhou City 646000, PR China
| | - Chunmei Wang
- Experimental Teaching Center, School of Public Health, Southwest Medical University, Luzhou City 646000, PR China
| | - Wen Wang
- Department of Public Health, School of Public Health, Southwest Medical University, Luzhou City 646000, PR China
| | - Chengwei Yue
- Department of Prevention Medicine, School of Public Health, Southwest Medical University, Luzhou City 646000, PR China
| | - Yan Tang
- Experimental Teaching Center, School of Public Health, Southwest Medical University, Luzhou City 646000, PR China.
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He L, Yang X, Ren M, Kong X, Liu Y, Lin W. An ultra-fast illuminating fluorescent probe for monitoring formaldehyde in living cells, shiitake mushrooms, and indoors. Chem Commun (Camb) 2016; 52:9582-5. [DOI: 10.1039/c6cc04254f] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An ultra-fast illuminating fluorescent formaldehyde probe (R6-FA) was engineered for tracing formaldehyde in living cells, shiitake mushrooms and indoors.
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Affiliation(s)
- Longwei He
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
| | - Xueling Yang
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
| | - Mingguang Ren
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
| | - Xiuqi Kong
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
| | - Yong Liu
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
| | - Weiying Lin
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
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13
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Tong Y, Sun Y, Tian X, Zhou T, Wang H, Zhang T, Zhan R, Zhao L, Kuerban B, Li Z, Wang Q, Jin Y, Fan D, Guo X, Han H, Qin S, Chui D. Phospholipid transfer protein (PLTP) deficiency accelerates memory dysfunction through altering amyloid precursor protein (APP) processing in a mouse model of Alzheimer's disease. Hum Mol Genet 2015; 24:5388-403. [DOI: 10.1093/hmg/ddv262] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 07/06/2015] [Indexed: 01/19/2023] Open
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14
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Yang H, Zhou T, Wang H, Liu T, Ueda K, Zhan R, Zhao L, Tong Y, Tian X, Zhang T, Jin Y, Han X, Li Z, Zhao Y, Guo X, Xiao W, Fan D, Liu G, Chui D. Lipoprotein lipase deficiency leads to α-synuclein aggregation and ubiquitin C-terminal hydrolase L1 reduction. Neuroscience 2015; 290:1-10. [DOI: 10.1016/j.neuroscience.2014.12.068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 12/29/2014] [Accepted: 12/30/2014] [Indexed: 10/24/2022]
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15
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Jiang JM, Zhou CF, Gao SL, Tian Y, Wang CY, Wang L, Gu HF, Tang XQ. BDNF-TrkB pathway mediates neuroprotection of hydrogen sulfide against formaldehyde-induced toxicity to PC12 cells. PLoS One 2015; 10:e0119478. [PMID: 25749582 PMCID: PMC4352058 DOI: 10.1371/journal.pone.0119478] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Accepted: 01/13/2015] [Indexed: 11/18/2022] Open
Abstract
Formaldehyde (FA) is a common environmental contaminant that has toxic effects on the central nervous system (CNS). Our previous data demonstrated that hydrogen sulfide (H2S), the third endogenous gaseous mediator, has protective effects against FA-induced neurotoxicity. As is known to all, Brain-derived neurotropic factor (BDNF), a member of the neurotrophin gene family, mediates its neuroprotective properties via various intracellular signaling pathways triggered by activating the tyrosine kinase receptor B (TrkB). Intriguingly, our previous data have illustrated the upregulatory role of H2S on BDNF protein expression in the hippocampus of rats. Therefore, in this study, we hypothesized that H2S provides neuroprotection against FA toxicity by regulating BDNF-TrkB pathway. In the present study, we found that NaHS, a donor of H2S, upregulated the level of BDNF protein in PC12 cells, and significantly rescued FA-induced downregulation of BDNF levels. Furthermore, we found that pretreatment of PC12 cells with K252a, an inhibitor of the BDNF receptor TrkB, markedly reversed the inhibition of NaHS on FA-induced cytotoxicity and ablated the protective effects of NaHS on FA-induced oxidative stress, including the accumulation of intracellular reactive oxygen species (ROS), 4-hydroxy-2-trans-nonenal (4-HNE), and malondialdehyde (MDA). We also showed that K252a abolished the inhibition of NaHS on FA-induced apoptosis, as well as the activation of caspase-3 in PC12 cells. In addition, K252a reversed the protection of H2S against FA-induced downregulation of Bcl-2 protein expression and upregulation of Bax protein expression in PC12 cells. These data indicate that the BDNF-TrkB pathway mediates the neuroprotection of H2S against FA-induced cytotoxicity, oxidative stress and apoptosis in PC12 cells. These findings provide a novel mechanism underlying the protection of H2S against FA-induced neurotoxicity.
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Affiliation(s)
- Jia-Mei Jiang
- Department of Physiology & Institute of Neuroscience, Medical College, University of South China, Hengyang, 42100, Hunan, P. R. China
- Key Laboratory for Cognitive Disorders and Neurodegenerative Diseases, University of South China, Hengyang, 421001, Hunan, P. R. China
| | - Cheng-Fang Zhou
- Department of Physiology & Institute of Neuroscience, Medical College, University of South China, Hengyang, 42100, Hunan, P. R. China
| | - Sheng-Lan Gao
- Department of Physiology & Institute of Neuroscience, Medical College, University of South China, Hengyang, 42100, Hunan, P. R. China
- Key Laboratory for Cognitive Disorders and Neurodegenerative Diseases, University of South China, Hengyang, 421001, Hunan, P. R. China
| | - Ying Tian
- Department of Biochemistry, Medical College, University of South China, Hengyang, 421001, Hunan, P.R. China
- * E-mail: (X-QT); (YT)
| | - Chun-Yan Wang
- Department of Pathophysiology, Medical College, University of South China, Hengyang, 421001, Hunan, P.R. China
| | - Li Wang
- Department of Anthropotomy, Medical College, University of South China, Hengyang, 421001, Hunan, P.R. China
| | - Hong-Feng Gu
- Department of Physiology & Institute of Neuroscience, Medical College, University of South China, Hengyang, 42100, Hunan, P. R. China
- Key Laboratory for Cognitive Disorders and Neurodegenerative Diseases, University of South China, Hengyang, 421001, Hunan, P. R. China
| | - Xiao-Qing Tang
- Department of Physiology & Institute of Neuroscience, Medical College, University of South China, Hengyang, 42100, Hunan, P. R. China
- Key Laboratory for Cognitive Disorders and Neurodegenerative Diseases, University of South China, Hengyang, 421001, Hunan, P. R. China
- * E-mail: (X-QT); (YT)
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Liu Y, Sun Z, Sun S, Duan Y, Shi J, Qi Z, Meng R, Sun Y, Zeng X, Chui D, Ji X. Effects of hypoxic preconditioning on synaptic ultrastructure in mice. Synapse 2014; 69:7-14. [PMID: 25155519 DOI: 10.1002/syn.21777] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 07/21/2014] [Accepted: 08/08/2014] [Indexed: 11/06/2022]
Abstract
Hypoxic preconditioning (HPC) elicits resistance to more drastic subsequent insults, which potentially provide neuroprotective therapeutic strategy, but the underlying mechanisms remain to be fully elucidated. Here, we examined the effects of HPC on synaptic ultrastructure in olfactory bulb of mice. Mice underwent up to five cycles of repeated HPC treatments, and hypoxic tolerance was assessed with a standard gasp reflex assay. As expected, HPC induced an increase in tolerance time. To assess synaptic responses, Western blots were used to quantify protein levels of representative markers for glia, neuron, and synapse, and transmission electron microscopy was used to examine synaptic ultrastructure and mitochondrial density. HPC did not significantly alter the protein levels of astroglial marker (GFAP), neuron-specific markers (GAP43, Tuj-1, and OMP), synaptic number markers (synaptophysin and SNAP25) or the percentage of excitatory synapses versus inhibitory synapses. However, HPC significantly affected synaptic curvature and the percentage of synapses with presynaptic mitochondria, which showed concomitant change pattern. These findings demonstrate that HPC is associated with changes in synaptic ultrastructure.
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Affiliation(s)
- Yi Liu
- China-America Joint Institute of Neuroscience, CAJIN, Xuanwu Hospital, Capital Medical University, Beijing, China; Neuroprotection Research Laboratory, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts; Neuroprotection Research Laboratory, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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Zhang Q, Yan W, Bai Y, Zhu Y, Ma J. Repeated formaldehyde inhalation impaired olfactory function and changed SNAP25 proteins in olfactory bulb. INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HEALTH 2014; 20:308-12. [PMID: 25131264 DOI: 10.1179/2049396714y.0000000079] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
BACKGROUND Formaldehyde inhalation exposure, which can occur through occupational exposure, can lead to sensory irritation, neurotoxicity, mood disorders, and learning and memory impairment. However, its influence on olfactory function is unclear. OBJECTIVES To investigate the mechanism and the effect of repeated formaldehyde inhalation exposure on olfactory function. METHODS Rats were treated with formaldehyde inhalation (13·5±1·5 ppm, twice 30 minutes/day) for 14 days. Buried food pellet and locomotive activity tests were used to detect olfactory function and locomotion. Western blots were used to evaluate synaptosomal-associated protein 25 (SNAP25) protein levels in the olfactory bulb (OB) lysate and synaptosome, as well as mature and immature olfactory sensory neuron markers, olfactory marker protein (OMP), and Tuj-1. Real-time polymerase chain reaction (PCR) was used to detect SNAP25 mRNA amounts. RESULTS Repeated formaldehyde inhalation exposure impaired olfactory function, whereas locomotive activities were unaffected. SNAP25 protein decreased significantly in the OB, but not in the occipital lobe. SNAP25 also decreased in the OB synaptosome when synaptophysin did not change after formaldehyde treatment. mRNA levels of SNAP25A and SNAP25B were unaffected. Mature and immature olfactory sensory neuron marker, OMP, and Tuj-1, did not change after formaldehyde treatment. CONCLUSION Repeated formaldehyde exposure impaired olfactory function by disturbing SNAP25 protein in the OB.
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Li X, Zhang KY, Zhang P, Chen LX, Wang L, Xie M, Wang CY, Tang XQ. Hydrogen sulfide inhibits formaldehyde-induced endoplasmic reticulum stress in PC12 cells by upregulation of SIRT-1. PLoS One 2014; 9:e89856. [PMID: 24587076 PMCID: PMC3938548 DOI: 10.1371/journal.pone.0089856] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 01/23/2014] [Indexed: 12/29/2022] Open
Abstract
Background Formaldehyde (FA), a well-known environmental pollutant, has been classified as a neurotoxic molecule. Our recent data demonstrate that hydrogen sulfide (H2S), the third gaseous transmitter, has a protective effect on the neurotoxicity of FA. However, the exact mechanisms underlying this protection remain largely unknown. Endoplasmic reticulum (ER) stress has been implicated in the neurotoxicity of FA. Silent mating type information regulator 2 homolog 1 (SIRT-1), a histone deacetylases, has various biological activities, including the extension of lifespan, the modulation of ER stress, and the neuroprotective action. Objective We hypothesize that the protection of H2S against FA-induced neurotoxicity involves in inhibiting ER stress by upregulation of SIRT-1. The present study attempted to investigate the protective effect of H2S on FA-induced ER stress in PC12 cells and the contribution of SIRT-1 to the protection of H2S against FA-induced injuries, including ER stress, cytotoxicity and apoptosis. Principal Findings We found that exogenous application of sodium hydrosulfide (NaHS; an H2S donor) significantly attenuated FA-induced ER stress responses, including the upregulated levels of glucose-regulated protein 78, C/EBP homologous protein, and cleaved caspase-12 expression. We showed that NaHS upregulates the expression of SIRT-1 in PC12 cells. Moreover, the protective effects of H2S on FA-elicited ER stress, cytotoxicity and apoptosis were reversed by Sirtinol, a specific inhibitor of SIRT-1. Conclusion/Significance These data indicate that H2S exerts its protection against the neurotoxicity of FA through overcoming ER stress via upregulation of SIRT-1. Our findings provide novel insights into the protective mechanisms of H2S against FA-induced neurotoxicity.
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Affiliation(s)
- Xiang Li
- Department of Anesthesiology, the First Affiliated Hospital, University of South China, Hengyang, Hunan, P. R. China
- Department of Neurology, the First Affiliated Hospital, University of South China, Hengyang, Hunan, P. R. China
| | - Kai-Yan Zhang
- Department of Neurology, the First Affiliated Hospital, University of South China, Hengyang, Hunan, P. R. China
- Institute of Neuroscience, Medical College, University of South China, Hengyang, Hunan, P. R. China
| | - Ping Zhang
- Department of Neurology, Nanhua Affiliated Hospital, University of South China, Hengyang, Hunan, P. R. China
| | - Li-Xun Chen
- Department of Neurology, the First Affiliated Hospital, University of South China, Hengyang, Hunan, P. R. China
| | - Li Wang
- Department of Anthropotomy, Medical College, University of South China, Hengyang, Hunan, P.R. China
| | - Ming Xie
- Department of Anesthesiology, the First Affiliated Hospital, University of South China, Hengyang, Hunan, P. R. China
- Department of Neurology, the First Affiliated Hospital, University of South China, Hengyang, Hunan, P. R. China
- * E-mail: (X-QT); (MX)
| | - Chun-Yan Wang
- Department of Pathophysiology, Medical College, University of South China, Hengyang, Hunan, P.R. China
| | - Xiao-Qing Tang
- Department of Anesthesiology, the First Affiliated Hospital, University of South China, Hengyang, Hunan, P. R. China
- Institute of Neuroscience, Medical College, University of South China, Hengyang, Hunan, P. R. China
- * E-mail: (X-QT); (MX)
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Wang F, Li C, Liu W, Jin Y. Potential mechanisms of neurobehavioral disturbances in mice caused by sub-chronic exposure to low-dose VOCs. Inhal Toxicol 2014; 26:250-8. [DOI: 10.3109/08958378.2014.882447] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Tian GH, Sun K, Huang P, Zhou CM, Yao HJ, Huo ZJ, Hao HF, Yang L, Pan CS, He K, Fan JY, Li ZG, Han JY. Long-Term Stimulation with Electroacupuncture at DU20 and ST36 Rescues Hippocampal Neuron through Attenuating Cerebral Blood Flow in Spontaneously Hypertensive Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2013; 2013:482947. [PMID: 23662137 PMCID: PMC3626240 DOI: 10.1155/2013/482947] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 03/10/2013] [Accepted: 03/14/2013] [Indexed: 01/10/2023]
Abstract
This study was designed to investigate the effect of long-term electroacupuncture at Baihui (DU20) and Zusanli (ST36) on cerebral microvessels and neurons in CA1 region of hippocampus in spontaneously hypertensive rats (SHR). A total of 45 male Wistar rats and 45 SHR were randomly grouped, with or without electroacupuncture (EA) at DU20 and ST36, once every other day for a period of 8 weeks. The mean arterial pressure (MAP) was measured once every 2 weeks. Cerebral blood flow (CBF) and the number of open microvessels in hippocampal CA1 region were detected by Laser Doppler and immunohistochemistry, respectively. Nissl staining and Western blotting were performed, respectively, to determine hippocampus morphology and proteins that were implicated in the concerning signaling pathways. The results showed that the MAP in SHR increased linearly over the observation period and was significantly reduced following electroacupuncture as compared with sham control SHR rats, while no difference was observed in Wistar rats between EA and sham control. The CBF, learning and memory capacity, and capillary rarefaction of SHR were improved by EA. The upregulation of angiotensin II type I receptor (AT1R), endothelin receptor (ETAR), and endothelin-1 (ET-1) in SHR rats was attenuated by electroacupuncture, suggesting an implication of AT1R, ETAR, and ET-1 pathway in the effect of EA.
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Affiliation(s)
- Gui-Hua Tian
- School of Acupuncture and Moxibustion, Beijing University of Chinese Medicine, Beijing 100029, China
- Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing 101121, China
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
| | - Kai Sun
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
- Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing 100191, China
| | - Ping Huang
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
- Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing 100191, China
| | - Chang-Man Zhou
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
- Department of Anatomy, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Hai-Jiang Yao
- School of Acupuncture and Moxibustion, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Ze-Jun Huo
- School of Acupuncture and Moxibustion, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Hui-Feng Hao
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
- Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing 100191, China
- Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Lei Yang
- Department of Anatomy, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Chun-Shui Pan
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
- Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing 100191, China
| | - Ke He
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
- Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing 100191, China
- Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Jing-Yu Fan
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
- Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing 100191, China
| | - Zhi-Gang Li
- School of Acupuncture and Moxibustion, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Jing-Yan Han
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
- Key Laboratory of Microcirculation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Beijing 100191, China
- Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, Beijing 100191, China
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Tang XQ, Fang HR, Zhou CF, Zhuang YY, Zhang P, Gu HF, Hu B. A novel mechanism of formaldehyde neurotoxicity: inhibition of hydrogen sulfide generation by promoting overproduction of nitric oxide. PLoS One 2013; 8:e54829. [PMID: 23359814 PMCID: PMC3554621 DOI: 10.1371/journal.pone.0054829] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 12/17/2012] [Indexed: 12/29/2022] Open
Abstract
Background Formaldehyde (FA) induces neurotoxicity by overproduction of intracellular reactive oxygen species (ROS). Increasing studies have shown that hydrogen sulfide (H2S), an endogenous gastransmitter, protects nerve cells against oxidative stress by its antioxidant effect. It has been shown that overproduction of nitric oxide (NO) inhibits the activity of cystathionine-beta-synthase (CBS), the predominant H2S-generating enzyme in the central nervous system. Objective We hypothesize that FA-caused neurotoxicity involves the deficiency of this endogenous protective antioxidant gas, which results from excessive generation of NO. The aim of this study is to evaluate whether FA disturbs H2S synthesis in PC12 cells, and whether this disturbance is associated with overproduction of NO. Principal Findings We showed that exposure of PC12 cells to FA causes reduction of viability, inhibition of CBS expression, decrease of endogenous H2S production, and NO production. CBS silencing deteriorates FA-induced decreases in endogenous H2S generation, neurotoxicity, and intracellular ROS accumulation in PC12 cells; while ADMA, a specific inhibitor of NOS significantly attenuates FA-induced decreases in endogenous H2S generation, neurotoxicity, and intracellular ROS accumulation in PC12 cells. Conclusion/Significance Our data indicate that FA induces neurotoxicity by inhibiting the generation of H2S through excess of NO and suggest that strategies to manipulate endogenous H2S could open a suitable novel therapeutic avenue for FA-induced neurotoxicity.
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Affiliation(s)
- Xiao-Qing Tang
- Department of Physiology, Medical College, University of South China, Hengyang, Hunan, P. R. China
- * E-mail: (X-QT); (PZ)
| | - Heng-Rong Fang
- Department of Physiology, Medical College, University of South China, Hengyang, Hunan, P. R. China
- Department of Pharmacy, Hengyang Central Hospital, Hengyang, Hunan, P. R. China
| | - Cheng-Fang Zhou
- Department of Physiology, Medical College, University of South China, Hengyang, Hunan, P. R. China
| | - Yuan-Yuan Zhuang
- Department of Physiology, Medical College, University of South China, Hengyang, Hunan, P. R. China
| | - Ping Zhang
- Department of Neurology, Nanhua Affiliated Hospital, University of South China, Hengyang, Hunan, P. R. China
- * E-mail: (X-QT); (PZ)
| | - Hong-Feng Gu
- Department of Physiology, Medical College, University of South China, Hengyang, Hunan, P. R. China
| | - Bi Hu
- Department of Physiology, Medical College, University of South China, Hengyang, Hunan, P. R. China
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Tang XQ, Zhuang YY, Zhang P, Fang HR, Zhou CF, Gu HF, Zhang H, Wang CY. Formaldehyde impairs learning and memory involving the disturbance of hydrogen sulfide generation in the hippocampus of rats. J Mol Neurosci 2012; 49:140-9. [PMID: 23108488 DOI: 10.1007/s12031-012-9912-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 10/18/2012] [Indexed: 12/17/2022]
Abstract
Formaldehyde (FA), a well-known indoor and outdoor pollutant, has been implicated as the responsible agent in the development of neurocognitive disorders. Hydrogen sulfide (H(2)S), the third gasotransimitter, is an endogenous neuromodulator, which facilitates the induction of hippocampal long-term potentiation, involving the functions of learning and memory. In the present study, we analyzed the effects of intracerebroventricular injection of FA on the formation of learning and memory and the generation of endogenous H(2)S in the hippocampus of rats. We found that the intracerebroventricular injection of FA in rats impairs the function of learning and memory in the Morris water maze and novel object recognition test and increases the formation of apoptosis and lipid peroxidation in the hippocampus. We also showed that FA exposure inhibits the expression of cystathionine β-synthase, the major enzyme responsible for endogenous H(2)S generation in hippocampus and decreases the production of endogenous H(2)S in hippocampus in rats. These results suggested that FA-disturbed generation of endogenous H(2)S in hippocampus leads to the oxidative stress-mediated neuron damage, ultimately impairing the function of learning and memory. Our findings imply that the disturbance of endogenous H(2)S generation in hippocampus is a potential contributing mechanism underling FA-caused learning and memory impairment.
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Affiliation(s)
- Xiao-Qing Tang
- Department of Physiology, Medical College, University of South China, 28 W Changsheng Road, Hengyang, 421001 Hunan, People's Republic of China.
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The Relationship Between Brain Aging and Preclinical Alzheimer′s Disease. PROG BIOCHEM BIOPHYS 2012. [DOI: 10.3724/sp.j.1206.2012.00351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ramakrishnan NA, Drescher MJ, Drescher DG. The SNARE complex in neuronal and sensory cells. Mol Cell Neurosci 2012; 50:58-69. [PMID: 22498053 PMCID: PMC3570063 DOI: 10.1016/j.mcn.2012.03.009] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2012] [Revised: 03/23/2012] [Accepted: 03/26/2012] [Indexed: 11/28/2022] Open
Abstract
Transmitter release at synapses ensures faithful chemical coding of information that is transmitted in the sub-second time frame. The brain, the central unit of information processing, depends upon fast communication for decision making. Neuronal and neurosensory cells are equipped with the molecular machinery that responds reliably, and with high fidelity, to external stimuli. However, neuronal cells differ markedly from neurosensory cells in their signal transmission at synapses. The main difference rests in how the synaptic complex is organized, with active zones in neuronal cells and ribbon synapses in sensory cells (such as photoreceptors and hair cells). In exocytosis/neurosecretion, SNAREs (soluble N-ethylmaleimide-sensitive fusion protein attachment protein receptors) and associated proteins play a critical role in vesicle docking, priming, fusion and synchronization of neurotransmitter release. Recent studies suggest differences between neuronal and sensory cells with respect to the molecular components of their synaptic complexes. In this review, we will cover current findings on neuronal and sensory-cell SNARE proteins and their modulators. We will also briefly discuss recent investigations on how deficits in the expression of SNARE proteins in humans impair function in brain and sense organs.
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Affiliation(s)
| | - Marian J. Drescher
- Department of Otolaryngology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Dennis G. Drescher
- Department of Otolaryngology, Wayne State University School of Medicine, Detroit, MI, USA
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, MI, USA
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Hydrogen sulfide prevents formaldehyde-induced neurotoxicity to PC12 cells by attenuation of mitochondrial dysfunction and pro-apoptotic potential. Neurochem Int 2012; 61:16-24. [PMID: 22542418 DOI: 10.1016/j.neuint.2012.04.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2011] [Revised: 04/08/2012] [Accepted: 04/11/2012] [Indexed: 11/23/2022]
Abstract
Hydrogen sulfide (H(2)S) has been shown to act as a neuroprotectant and antioxidant. Numerous studies have demonstrated that exposure to formaldehyde (FA) causes neuronal damage and that oxidative stress is one of the most critical effects of FA exposure. Accumulation of FA is involved in the pathogenesis of Alzheimer's disease (AD). The aim of present study is to explore the inhibitory effects of H(2)S on FA-induced cytotoxicity and apoptosis and the molecular mechanisms underlying in PC12 cells. We show that sodium hydrosulfide (NaHS), a H(2)S donor, protects PC12 cells against FA-mediated cytotoxicity and apoptosis and that NaHS preserves the function of mitochondria by preventing FA-induced loss of mitochondrial membrane potential and release of cytochrome c in PC12 cells. Furthermore, NaHS blocks FA-exerted accumulation of intracellular reactive oxygen species (ROS), down-regulation of Bcl-2 expression, and up-regulation of Bax expression. These results indicate that H(2)S protects neuronal cells against neurotoxicity of FA by preserving mitochondrial function through attenuation of ROS accumulation, up-regulation of Bcl-2 level, and down-regulation of Bax expression. Our study suggests a promising future of H(2)S-based preventions and therapies for neuronal damage after FA exposure.
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