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Wang H, Li J, Li X. Construction and validation of an oxidative-stress-related risk model for predicting the prognosis of osteosarcoma. Aging (Albany NY) 2023; 15:204764. [PMID: 37285835 DOI: 10.18632/aging.204764] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/15/2023] [Indexed: 06/09/2023]
Abstract
BACKGROUND Osteosarcoma is the most common bone malignancy in teenagers, and warrants effective measures for diagnosis and prognosis. Oxidative stress (OS) is the key driver of several cancers and other diseases. METHODS The TARGET-osteosarcoma database was employed as the training cohort and GSE21257 and GSE39055 was applied for external validation. The patients were classified into the high- and low-risk groups based on the median risk score of each sample. ESTIMATE and CIBERSORT were applied for the evaluation of tumor microenvironment immune infiltration. GSE162454 of single-cell sequencing was employed for analyzing OS-related genes. RESULTS Based on the gene expression and clinical data of 86 osteosarcoma patients in the TARGET database, we identified eight OS-related genes, including MAP3K5, G6PD, HMOX1, ATF4, ACADVL, MAPK1, MAPK10, and INS. In both the training and validation sets, the overall survival of patients in the high-risk group was significantly worse than that in the low-risk group. The ESTIMATE algorithm revealed that patients in the high-risk group had higher tumor purity but lower immune score and stromal score. In addition, the CIBERSORT algorithm showed that the M0 and M2 macrophages were the predominant infiltrating cells in osteosarcoma. Based on the expression analysis of immune checkpoint, CD274(PDL1), CXCL12, BTN3A1, LAG3, and IL10 were identified as potential immune therapy targets. Analysis of the single cell sequencing data also revealed the expression patterns of OS-related genes in different cell types. CONCLUSIONS An OS-related prognostic model can accurately provide the prognosis of osteosarcoma patients, and may help identify suitable candidates for immunotherapy.
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Affiliation(s)
- Hanning Wang
- Department of Orthopedics, The First Hospital of China Medical University, Shenyang, Liaoning Province 110001, P.R. China
| | - Juntan Li
- Department of Orthopedics, The First Hospital of China Medical University, Shenyang, Liaoning Province 110001, P.R. China
| | - Xu Li
- Department of Orthopedics, The First Hospital of China Medical University, Shenyang, Liaoning Province 110001, P.R. China
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Abbaszade-Cheragheali A, Kakhki S, Khatibi SR, Hosseini M, Navari F, Beheshti F. Feeding crocin ameliorate cognitive dysfunction, oxidative stress and neuroinflammation induced by unpredictable chronic mild stress in rats. Inflammopharmacology 2023:10.1007/s10787-023-01250-9. [PMID: 37261629 DOI: 10.1007/s10787-023-01250-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 01/23/2023] [Indexed: 06/02/2023]
Abstract
INTRODUCTION The aim of the current study was to investigate the probable mechanism and effect of crocin on brain oxidative damage and memory deficits induced by unpredictable chronic mild stress (UCMS). MATERIALS AND METHODS Male Wistar rats were randomly divided into six groups consisting of one vehicle group (received normal saline), four groups included rats who received UCMS 4 weeks out of which three groups were pretreated with different doses of crocin (10, 20, and 30 mg/kg/day) concomitantly. To assess the pure effect of crocin, the last experimental group received a high dose of crocin (30 mg/kg/day) without exposure to the UCMS procedure. The behavioral tests including Morris water maze (MWM) and passive avoidance (PA) were performed and eventually they were sacrificed for the estimation of biochemical parameters. RESULTS The increase in Malondialdehyde (MDA) as an oxidative stress indicator and nitrite levels in the hippocampus were observed in UCMS rats, along with memory deficits in behavioral tests including passive avoidance and Morris water maze (MWM) test. Moreover, treatment with crocin decreased MDA, nitrite, pro-inflammatory cytokine such as TNF-α, and pathological hallmark of Alzheimer's disease including amyloid-β (Aβ), and glial fibrillary acidic protein (GFAP) in the hippocampus, whereas antioxidant agents including total thiol content, SOD, and catalase activity were increased. Also behavioral test demonstrated a positive effect of crocin on memory deficit induced by UCMS. Interlukin-10 as an important anti-inflammatory agent was increased as well. Interestingly, in some behavioral and biochemical findings, treatment with 30 mg/kg of crocin has given better results compared to vehicle group, which means the administration of crocin could have preventive effects on learning and memory impairment. CONCLUSION The present study strongly confirmed the positive effect of crocin and has the potential as an antioxidant and anti-inflammatory agent that could improve memory impairment induced by UCMS.
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Affiliation(s)
- Ali Abbaszade-Cheragheali
- Student Research Committee, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
- Neuroscience Research Center, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
- Departments of Physiology, School of Medicine, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
| | - Samaneh Kakhki
- Neuroscience Research Center, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
- Department of Clinical Biochemistry, School of Medicine, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
| | - Seyed Reza Khatibi
- Department of Public Health, School of Health, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
| | - Mahmoud Hosseini
- Psychiatry and Behavioral Sciences Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Farzaneh Navari
- Imam Hossein Educational Hospital, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
| | - Farimah Beheshti
- Student Research Committee, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran.
- Neuroscience Research Center, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran.
- Departments of Physiology, School of Medicine, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran.
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Gandla K, Babu AK, Unnisa A, Sharma I, Singh LP, Haque MA, Dashputre NL, Baig S, Siddiqui FA, Khandaker MU, Almujally A, Tamam N, Sulieman A, Khan SL, Emran TB. Carotenoids: Role in Neurodegenerative Diseases Remediation. Brain Sci 2023; 13:brainsci13030457. [PMID: 36979267 PMCID: PMC10046158 DOI: 10.3390/brainsci13030457] [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: 02/08/2023] [Revised: 03/01/2023] [Accepted: 03/03/2023] [Indexed: 03/30/2023] Open
Abstract
Numerous factors can contribute to the development of neurodegenerative disorders (NDs), such as Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, Huntington's disease, and multiple sclerosis. Oxidative stress (OS), a fairly common ND symptom, can be caused by more reactive oxygen species being made. In addition, the pathological state of NDs, which includes a high number of protein aggregates, could make chronic inflammation worse by activating microglia. Carotenoids, often known as "CTs", are pigments that exist naturally and play a vital role in the prevention of several brain illnesses. CTs are organic pigments with major significance in ND prevention. More than 600 CTs have been discovered in nature, and they may be found in a wide variety of creatures. Different forms of CTs are responsible for the red, yellow, and orange pigments seen in many animals and plants. Because of their unique structure, CTs exhibit a wide range of bioactive effects, such as anti-inflammatory and antioxidant effects. The preventive effects of CTs have led researchers to find a strong correlation between CT levels in the body and the avoidance and treatment of several ailments, including NDs. To further understand the connection between OS, neuroinflammation, and NDs, a literature review has been compiled. In addition, we have focused on the anti-inflammatory and antioxidant properties of CTs for the treatment and management of NDs.
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Affiliation(s)
- Kumaraswamy Gandla
- Department of Pharmaceutical Analysis, Chaitanya (Deemed to be University), Hanamakonda 506001, Telangana, India
| | - Ancha Kishore Babu
- School of Pharmacy, KPJ Healthcare University, Persiaran Seriemas, Nilai 71800, Negeri Sembilan, Malaysia
| | - Aziz Unnisa
- Department of Pharmaceutical Chemistry, College of Pharmacy, University of Ha'il, Ha'il 55476, Saudi Arabia
| | - Indu Sharma
- Department of Physics, Career Point University, Hamirpur 176041, Himachal Pradesh, India
| | - Laliteshwar Pratap Singh
- Department of Pharmaceutical Chemistry, Narayan Institute of Pharmacy, Gopal Narayan Singh University, Jamuhar, Sasaram 821305, Bihar, India
| | - Mahammad Akiful Haque
- Department of Pharmaceutical Analysis, School of Pharmacy, Anurag University, Hyderabad 500088, Telangana, India
| | - Neelam Laxman Dashputre
- Department of Pharmacology, METs, Institute of Pharmacy Bhujbal Knowledge City, Adgaon, Nashik 422003, Maharashtra, India
| | - Shahajan Baig
- Clinical Research Associate, Clinnex, Ahmedabad 380054, Gujarat, India
| | - Falak A Siddiqui
- Department of Pharmaceutical Chemistry, N.B.S. Institute of Pharmacy, Ausa 413520, Maharashtra, India
| | - Mayeen Uddin Khandaker
- Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, Bandar Sunway 47500, Selangor, Malaysia
| | - Abdullah Almujally
- Department of Biomedical Physics, King Faisal Specialist Hospital and Research Center, Riyadh 11564, Saudi Arabia
| | - Nissren Tamam
- Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Abdelmoneim Sulieman
- Radiology and Medical Imaging Department, College of Applied Medical Sciences, Prince Sattam Bin Abdulaziz University, P.O. Box 422, Alkharj 11942, Saudi Arabia
| | - Sharuk L Khan
- Department of Pharmaceutical Chemistry, N.B.S. Institute of Pharmacy, Ausa 413520, Maharashtra, India
| | - Talha Bin Emran
- Department of Pharmacy, BGC Trust University Bangladesh, Chittagong 4381, Bangladesh
- Department of Pharmacy, Faculty of Allied Health Sciences, Daffodil International University, Dhaka 1207, Bangladesh
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A puromycin-dependent activity-based sensing probe for histochemical staining of hydrogen peroxide in cells and animal tissues. Nat Protoc 2022; 17:1691-1710. [PMID: 35562423 DOI: 10.1038/s41596-022-00694-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 03/01/2022] [Indexed: 12/13/2022]
Abstract
Hydrogen peroxide (H2O2) is a key member of the reactive oxygen species family of transient small molecules that has broad contributions to oxidative stress and redox signaling. The development of selective and sensitive chemical probes can enable the study of H2O2 biology in cell, tissue and animal models. Peroxymycin-1 is a histochemical activity-based sensing probe that responds to H2O2 via chemoselective boronate oxidation to release puromycin, which is then covalently incorporated into nascent proteins by the ribosome and can be detected by antibody staining. Here, we describe an optimized two-step, one-pot protocol for synthesizing Peroxymycin-1 with improved yields over our originally reported procedure. We also present detailed procedures for applying Peroxymycin-1 to a broad range of biological samples spanning cells to animal tissues for profiling H2O2 levels through histochemical detection by using commercially available anti-puromycin antibodies. The preparation of Peroxymycin-1 takes 9 h, the confocal imaging experiments of endogenous H2O2 levels across different cancer cell lines take 1 d, the dot blot analysis of mouse liver tissues takes 1 d and the confocal imaging of mouse liver tissues takes 3-4 d.
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Liu NC, Liang CC, Li YCE, Lee IC. A Real-Time Sensing System for Monitoring Neural Network Degeneration in an Alzheimer’s Disease-on-a-Chip Model. Pharmaceutics 2022; 14:pharmaceutics14051022. [PMID: 35631608 PMCID: PMC9148060 DOI: 10.3390/pharmaceutics14051022] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/05/2022] [Accepted: 05/06/2022] [Indexed: 02/05/2023] Open
Abstract
Stem cell-based in vitro models may provide potential therapeutic strategies and allow drug screening for neurodegenerative diseases, including Alzheimer’s disease (AD). Herein, we develop a neural stem cell (NSC) spheroid-based biochip that is characterized by a brain-like structure, well-defined neural differentiation, and neural network formation, representing a brain-on-a-chip. This system consisted of microelectrode arrays with a multichannel platform and allowed the real-time monitoring of network formation and degeneration by impedance analysis. The parameters of this platform for the real-time tracking of network development and organization were established based on our previous study. Subsequently, β-amyloid (Aβ) was added into the brain-on-a-chip system to generate an AD-on-a-chip model, and toxic effects on neurons and the degeneration of synapses were observed. The AD-on-a-chip model may help us to investigate the neurotoxicity of Aβ on neurons and neural networks in real time. Aβ causes neural damage and accumulates around neurites or inside neurospheroids, as observed by immunostaining and scanning electron microscopy (SEM). After incubation with Aβ, reactive oxygen species (ROS) increased, synapse function decreased, and the neurotransmitter-acetylcholine (ACh) concentration decreased were observed. Most importantly, the real-time analysis system monitored the impedance value variation in the system with Aβ incubation, providing consecutive network disconnection data that are consistent with biological data. This platform provides simple, real-time, and convenient sensing to monitor the network microenvironment. The proposed AD-on-a-chip model enhances the understanding of neurological pathology, and the development of this model provides an alternative for the study of drug discovery and cell–protein interactions in the brain.
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Affiliation(s)
- Nien-Che Liu
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu 300044, Taiwan; (N.-C.L.); (C.-C.L.)
| | - Chu-Chun Liang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu 300044, Taiwan; (N.-C.L.); (C.-C.L.)
| | - Yi-Chen Ethan Li
- Department of Chemical Engineering, Feng Chia University, Taichung 407102, Taiwan;
| | - I-Chi Lee
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu 300044, Taiwan; (N.-C.L.); (C.-C.L.)
- Correspondence:
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OGG1 in Lung—More than Base Excision Repair. Antioxidants (Basel) 2022; 11:antiox11050933. [PMID: 35624797 PMCID: PMC9138115 DOI: 10.3390/antiox11050933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/03/2022] [Accepted: 05/07/2022] [Indexed: 12/04/2022] Open
Abstract
As the organ executing gas exchange and directly facing the external environment, the lungs are challenged continuously by various stimuli, causing the disequilibration of redox homeostasis and leading to pulmonary diseases. The breakdown of oxidants/antioxidants system happens when the overproduction of free radicals results in an excess over the limitation of cleaning capability, which could lead to the oxidative modification of macromolecules including nucleic acids. The most common type of oxidative base, 8-oxoG, is considered the marker of DNA oxidative damage. The appearance of 8-oxoG could lead to base mismatch and its accumulation might end up as tumorigenesis. The base 8-oxoG was corrected by base excision repair initiated by 8-oxoguanine DNA glycosylase-1 (OGG1), which recognizes 8-oxoG from the genome and excises it from the DNA double strand, generating an AP site for further processing. Aside from its function in DNA damage repairment, it has been reported that OGG1 takes part in the regulation of gene expression, derived from its DNA binding characteristic, and showed impacts on inflammation. Researchers believe that OGG1 could be the potential therapy target for relative disease. This review intends to make an overall summary of the mechanism through which OGG1 regulates gene expression and the role of OGG1 in pulmonary diseases.
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Abstract
Significance: Ischemia-reperfusion (IR) injury is a major component of severe damage in vascular occlusion during stroke, myocardial infarction, surgery, and organ transplantation, and is exacerbated by the excessive generation of reactive oxygen species (ROS), which occurs particularly during reperfusion. With the aging of the population, IR injury is becoming a serious problem in various organs, such as the kidney, brain, and heart, as well as in the mesenteric capillaries. Recent Advances: To prevent reperfusion injuries, natural and synthetic low-molecular-weight (LMW) antioxidants have been well studied. Critical Issues: However, these LMW antioxidants have various problems, including adverse effects due to excessive cellular uptake and their rapid clearance by the kidney, and cannot fully exert their potent antioxidant capacity in vivo. Future Directions: To overcome these problems, we designed and developed redox polymers with antioxidants covalently conjugated with them. These polymers self-assemble into nanoparticles in aqueous media, referred to as redox nanoparticles (RNPs). RNPs suppress their uptake into normal cells, accumulate at inflammation sites, and effectively scavenge ROS in damaged tissues. We had developed two types of RNPs: RNPN, which disintegrates in response to acidic pH; and RNPO, which does not collapse, regardless of the environmental pH. Utilizing the pH-sensitive and -insensitive characteristics of RNPN and RNPO, respectively, RNPs were found to exhibit remarkable therapeutic effects on various oxidative stress disorders, including IR injuries. Thus, RNPs are promising nanomedicines for use as next-generation antioxidants. This review summarizes the therapeutic impacts of RNPs in the treatment of kidney, cerebral, myocardial, and intestinal IR injuries. Antioxid. Redox Signal. 36, 70-80.
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Affiliation(s)
- Toru Yoshitomi
- Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
| | - Yukio Nagasaki
- Department of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan.,Master's School of Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.,Center for Research in Isotopes and Environmental Dynamics (CRiED), University of Tsukuba, Tsukuba, Japan
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The protective effects of Agomelatine against Aβ1-42 oligomers-induced cellular senescence mediated by SIRT6 and Agomelatine's potential in AD treatment. Hum Cell 2021; 34:1734-1743. [PMID: 34535875 DOI: 10.1007/s13577-021-00611-2] [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: 06/19/2021] [Accepted: 09/03/2021] [Indexed: 02/05/2023]
Abstract
Alzheimer's disease (AD) is a vicious degenerative disease commonly observed in the elderly population, and the deposition of Amyloid β (Aβ) is regarded as the principal pathological inducement of AD. Severe oxidative stress, inflammatory reactions, and cell senescence in neurons can be induced by Aβ1-42 oligomers, which further contribute to the damage on neurons. Agomelatine is an antidepressant that is recently claimed to have promising anti-oxidative stress and anti-inflammatory effects. The present study aims to explore the potential therapeutic function of Agomelatine on AD and the possible mechanism. Aβ1-42 oligomers were used to induce an in vitro injury model in SH-SY5Y neuronal cells. First, we found that exposure to Aβ1-42 oligomers significantly exacerbated oxidative stress by increasing hydrogen peroxide production and reducing glutathione peroxidase (GPx), which were partially rescued by Agomelatine. Also, Agomelatine attenuated Aβ1-42 oligomers-induced inflammatory response by decreasing the expression of TNF-α and IL-1β. Notably, Agomelatine improved cellular senescence by reducing senescence-associated β-galactosidase (SA-β-Gal) staining and mitigating Aβ1-42 oligomers-induced reduction of telomerase activity. In addition, the upregulated p16INK4A and p21CIP1 and the suppressed expression of SIRT6 in Aβ1-42 oligomers-treated cells were reversed by Agomelatine. Lastly, after the knockdown of SIRT6, the protective effect of Agomelatine against Aβ1-42 oligomers-induced cellular senescence was significantly eliminated. In conclusion, our data indicated that Agomelatine ameliorated Aβ1-42 oligomers-induced cellular senescence mediated by SIRT6, and thus, Agomelatine could be effective in treating AD.
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Iqubal A, Iqubal MK, Fazal SA, Pottoo FH, Haque SE. Nutraceuticals and their Derived Nano-formulations for the Prevention and Treatment of Alzheimer's disease. Curr Mol Pharmacol 2021; 15:23-50. [PMID: 33687906 DOI: 10.2174/1874467214666210309115605] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 11/22/2020] [Accepted: 12/02/2020] [Indexed: 11/22/2022]
Abstract
Alzheimer's disease is one of the common chronic neurological disorders and associated with cognitive dysfunction, depression and progressive dementia. Presence of β-amyloid or senile plaques, hyper-phosphorylated tau proteins, neurofibrillary tangle, oxidative-nitrative stress, mitochondrial dysfunction, endoplasmic reticulum stress, neuroinflammation and derailed neurotransmitter status are the hallmark of AD. Currently, donepezil, memantine, rivastigmine and galantamine are approved by the FDA for symptomatic management. It is well-known that these approved drugs only exert symptomatic relief and possess poor patient-compliance. Additionally, various published evidence shows the neuroprotective potential of various nutraceuticals via their antioxidant, anti-inflammatory and anti-apoptotic effects in the preclinical and clinical studies. These nutraceuticals possess a significant neuroprotective potential and hence, can be a future pharmacotherapeutic for the management and treatment of AD. However, nutraceutical suffers from certain major limitations such as poor solubility, low bioavailability, low stability, fast hepatic-metabolism and larger particle size. These pharmacokinetic attributes restrict their entry into the brain via the blood-brain barrier. Therefore, to over such issues, various nanoformulation of nutraceuticals was developed, that allows their effective delivery into brain owning to reduced particle size, increased lipophilicity increased bioavailability and avoidance of fast hepatic metabolism. Thus, in this review, we have discussed the etiology of AD, focused on the pharmacotherapeutics of nutraceuticals with preclinical and clinical evidence, discussed pharmaceutical limitation and regulatory aspects of nutraceuticals to ensure safety and efficacy. We further explored the latitude of various nanoformulation of nutraceuticals as a novel approach to overcome the existing pharmaceutical limitation and for effective delivery into the brain.
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Affiliation(s)
- Ashif Iqubal
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi-110062. India
| | - Mohammad Kashif Iqubal
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi-110062. India
| | - Syed Abul Fazal
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi-110062. India
| | - Faheem Hyder Pottoo
- Department of Pharmacology, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal, University, P.O.BOX 1982, Damman, 31441. Saudi Arabia
| | - Syed Ehtaishamul Haque
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi-110062. India
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Comparative Assessment of the Antioxidant Activities among the Extracts of Different Parts of Clausena lansium (Lour.) Skeels in Human Gingival Fibroblast Cells. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:3958098. [PMID: 33082823 PMCID: PMC7563039 DOI: 10.1155/2020/3958098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 09/08/2020] [Accepted: 09/22/2020] [Indexed: 12/29/2022]
Abstract
Clausena lansium (Lour.) Skeels (wampee) is an outstanding natural plant with medicinal properties. The aim of this study was to compare the cytoprotective effects of four parts of wampee under oxidative stress. The aqueous extracts of leaf, peel, pulp, and seed were tested for the proliferation effects on human gingival fibroblast (HGF) cells and the protective effects in the hydrogen peroxide-induced HGF model. Furthermore, the total glutathione assay and identification of rutin by high-performance liquid chromatography were carried out to attempt to determine whether the cytoprotective effects were related to the total glutathione (GSH) stability and rutin content. The results showed that all of the extracts had no cytotoxicity to HGF at tested concentrations ranging from 50 to 5000 μg/ml during 24 h, and the leaf, pulp, and seed extracts increased proliferation of HGF at relatively high concentrations. All the extracts except for the seed extract significantly decreased the production of reactive oxygen species, and the peel extracts exhibited the most effective antioxidant effect. The leaf extract had the highest anticytotoxicity and GSH stabilization effect in the HGF challenged with hydrogen peroxide. In addition, the relative content of rutin in peel and leaf extracts was higher than that in pulp and seed. The results of GSH assay and rutin identification suggest that different cellular protective effects among the four parts of wampee are partially related to the GSH stabilization and rutin content. These findings provide a scientific basis for the antioxidant effect-related biological activities of wampee extracts.
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Amyloid Beta-Peptide Increases BACE1 Translation through the Phosphorylation of the Eukaryotic Initiation Factor-2 α. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:2739459. [PMID: 33014268 PMCID: PMC7525306 DOI: 10.1155/2020/2739459] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 09/02/2020] [Accepted: 09/08/2020] [Indexed: 12/02/2022]
Abstract
Alzheimer's disease (AD) is tightly linked to oxidative stress since amyloid beta-peptide (Aβ) aggregates generate free radicals. Moreover, the aggregation of Aβ is increased by oxidative stress, and the neurotoxicity induced by the oligomers and fibrils is in part mediated by free radicals. Interestingly, it has been reported that oxidative stress can also induce BACE1 transcription and expression. BACE1 is the key enzyme in the cleavage of the amyloid precursor protein to produce Aβ, and the expression of this enzyme has been previously shown to be enhanced in the brains of Alzheimer's patients. Here, we have found that BACE1 expression is increased in the hippocampi from AD patients at both the early (Braak stage II) and late (Braak stage VI) stages of the disease as studied by immunohistochemistry and western blot. To address the role of Aβ and oxidative stress in the regulation of BACE1 expression, we have analyzed the effect of subtoxic concentrations of Aβ oligomers (0.25 μM) and H2O2 (10 mM) on a human neuroblastoma cell line. Firstly, our results show that Aβ oligomers and H2O2 induce an increase of BACE1 mRNA as we studied by qPCR. Regarding BACE1 translation, it is dependent on the phosphorylation of the eukaryotic initiation factor 2α (eIF2α), since BACE1 mRNA bears a 5′UTR that avoids its translation under basal conditions. BACE1 5′UTR contains four upstream initiating codons (uAUGs), and its translation is activated when eIF2α is phosphorylated. Consistently, we have obtained that Aβ oligomers and H2O2 increase the levels of BACE1 and p-eIF2α assayed by western blot and confocal microscopy. Our results suggest that Aβ oligomers increase BACE1 translation by phosphorylating eIF2α in a process that involves oxidative stress and conforms a pathophysiological loop, where the Aβ once aggregated favors its own production continuously by the increase in BACE1 expression as observed in AD patients.
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Lourdes A. Vega Rasgado, Urbieta AT, Medina Jiménez JM. Influence of Mitochondrial ATP-Sensitive Potassium Channels on Toxic Effect of Amyloid-β 25–35. NEUROCHEM J+ 2020. [DOI: 10.1134/s181971242001016x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Perruchot MH, Gondret F, Robert F, Dupuis E, Quesnel H, Dessauge F. Effect of the flavonoid baicalin on the proliferative capacity of bovine mammary cells and their ability to regulate oxidative stress. PeerJ 2019; 7:e6565. [PMID: 30863682 PMCID: PMC6407502 DOI: 10.7717/peerj.6565] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 02/01/2019] [Indexed: 12/13/2022] Open
Abstract
Background High-yielding dairy cows are prone to oxidative stress due to the high metabolic needs of homeostasis and milk production. Oxidative stress and inflammation are tightly linked; therefore, anti-inflammatory and/or natural antioxidant compounds may help improve mammary cell health. Baicalin, one of the major flavonoids in Scutellaria baicalensis, has natural antioxidant and anti-inflammatory properties in various cell types, but its effects on bovine mammary epithelial cells (BMECs) have not been investigated. Methods Explants from bovine mammary glands were collected by biopsy at the peak of lactation (approximately 60 days after the start of lactation) (n = three animals) to isolate BMECs corresponding to mature secretory cells. Cell viability, apoptosis, proliferative capacity and reactive oxygen species (ROS) production by BMECs were measured after increasing doses of baicalin were added to the culture media in the absence or presence of H2O2, which was used as an in vitro model of oxidative stress. Results Low doses of baicalin (1–10 µg/mL) had no or only slightly positive effects on the proliferation and viability of BMECs, whereas higher doses (100 or 200 µg/mL) markedly decreased BMEC proliferation. Baicalin decreased apoptosis rate at low concentrations (10 µg/mL) but increased apoptosis at higher doses. ROS production was decreased in BMECs treated with increasing doses of baicalin compared with untreated cells, and this decreased production was associated with increased intracellular concentrations of catalase and NRF-2. Irrespective of the dose, baicalin pretreatment attenuated H2O2-induced ROS production. Discussion These results indicate that baicalin exerts protective antioxidant effects on bovine mammary cells. This finding suggests that baicalin could be used to prevent oxidative metabolic disorders in dairy cows.
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Esparza JL, Gómez M, Domingo JL. Role of Melatonin in Aluminum-Related Neurodegenerative Disorders: a Review. Biol Trace Elem Res 2019; 188:60-67. [PMID: 29732485 DOI: 10.1007/s12011-018-1372-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 04/30/2018] [Indexed: 01/23/2023]
Abstract
Aluminum (Al), a potentially neurotoxic element, provokes various adverse effects on human health such as dialysis dementia, osteomalacia, and microcytic anemia. It has been also associated with serious neurodegenerative diseases such as Alzheimer's disease (AD), amyotrophic lateral sclerosis, and Parkinsonism dementia of Guam. The "aluminum hypothesis" of AD assumes that the metal complexes can potentiate the rate of aggregation of amyloid-β (Aβ), enhancing the toxicity of this peptide, and being able of contributing to the pathogenesis of AD. It has been supported by a number of analytical, epidemiological, and neurotoxicological studies. On the other hand, melatonin (Mel) is a potent direct free radical scavenger and indirect antioxidant, which acts increasing the activity of important related antioxidant enzymes, and preventing oxidative stress and cell death of neurons exposed to Aβ-induced neurotoxicity. Therefore, Mel might be useful in the treatment of AD by reducing the Aβ generation and by inhibiting mitochondrial cell death pathways. The present review on the role of Mel in Al-related neurodegenerative disorders concludes that the protective effects of this hormone, together with its low toxicity, support the administration of Mel as a potential supplement in the treatment of neurological disorders, in which oxidative stress is involved.
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Affiliation(s)
- José L Esparza
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201, Reus, Catalonia, Spain
| | - Mercedes Gómez
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201, Reus, Catalonia, Spain
| | - José L Domingo
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201, Reus, Catalonia, Spain.
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Chen Y, Wang T, Rogers KA, Rutt BK, Ronald JA. Close Association of Myeloperoxidase-Producing Activated Microglia with Amyloid Plaques in Hypercholesterolemic Rabbits. J Alzheimers Dis 2019; 67:1221-1234. [DOI: 10.3233/jad-180714] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Yuanxin Chen
- Robarts Research Institute, Western University, London, Canada
| | - Tianduo Wang
- Robarts Research Institute, Western University, London, Canada
| | - Kem A. Rogers
- Department of Anatomy and Cell Biology, Western University, London, Canada
| | - Brian K. Rutt
- Department of Radiology, Stanford University, Stanford, CA, USA
| | - John A. Ronald
- Robarts Research Institute, Western University, London, Canada
- Department of Medical Biophysics, Western University, London, Canada
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Tang W, Li C, He Z, Pan F, Pan S, Wang Y. Probiotic Properties and Cellular Antioxidant Activity of Lactobacillus plantarum MA2 Isolated from Tibetan Kefir Grains. Probiotics Antimicrob Proteins 2019; 10:523-533. [PMID: 29159445 DOI: 10.1007/s12602-017-9349-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Lactobacillus plantarum MA2 was isolated from traditional Chinese Tibetan kefir grains. Its antioxidant properties had been demonstrated in vitro and in vivo previously. In the present study, the probiotic characteristics of this strain were further evaluated by investigating its acid and bile salt tolerances, cell surface hydrophobicity, and autoaggregation, respectively. In addition, the cellular antioxidant activity (CAA) assay was applied to test the antioxidant capacity of the isolate in different growth phases. Same method was also used to evaluate the antioxidant capacity of its fermentation supernatant, cell-free extract, and intact cell quantitatively. The results of probiotic characteristic tests showed that MA2 could survive at pH 2.5 and 0.3% bile salt. Meanwhile, the measurements of cell surface hydrophobicity and autoaggregation were 45.29 ± 2.15 and 6.30 ± 0.34%, respectively. The results of cellular antioxidant activity tests indicated that MA2 had high antioxidant potential. The CAA value of logarithmic phase cell-free extract of MA2 (39,450.00 ± 424.05 μmol quercetin equivalents/100 g sample) was significantly higher than that in stationary phase cell-free extract (3395.98 ± 126.06 μmol quercetin equivalents/100 g sample) and that of fermentation supernatant in logarithmic phase (2174.41 ± 224.47 μmol quercetin equivalents/100 g sample) (p < 0.05). The CAA method was successively applied to evaluate the antioxidant capacity of MA2 in this study, which suggests that it could be used as a useful method for lactic acid bacteria antioxidant potential evaluation.
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Affiliation(s)
- Wei Tang
- State Key Laboratory of Food Nutrition and Safety, China, Tianjin University of Science and Technology, Tianjin, 300457, China.,School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266000, China
| | - Chao Li
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Food Engineering and Biotechnology Institute, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Zengguo He
- School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266000, China
| | - Fen Pan
- State Key Laboratory of Food Nutrition and Safety, China, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Shuo Pan
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Food Engineering and Biotechnology Institute, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Yanping Wang
- State Key Laboratory of Food Nutrition and Safety, China, Tianjin University of Science and Technology, Tianjin, 300457, China. .,Key Laboratory of Food Nutrition and Safety, Ministry of Education, Food Engineering and Biotechnology Institute, Tianjin University of Science and Technology, Tianjin, 300457, China.
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Elfawy HA, Das B. Crosstalk between mitochondrial dysfunction, oxidative stress, and age related neurodegenerative disease: Etiologies and therapeutic strategies. Life Sci 2018; 218:165-184. [PMID: 30578866 DOI: 10.1016/j.lfs.2018.12.029] [Citation(s) in RCA: 202] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 12/10/2018] [Accepted: 12/15/2018] [Indexed: 12/21/2022]
Abstract
Mitochondrial function is vital for normal cellular processes. Mitochondrial damage and oxidative stress have been greatly implicated in the progression of aging, along with the pathogenesis of age-related neurodegenerative diseases (NDs), such as Alzheimer's disease, Parkinson's disease, Huntington's disease, and amyotrophic lateral sclerosis. Although antioxidant therapy has been proposed for the prevention and treatment of age-related NDs, unraveling the molecular mechanisms of mitochondrial dysfunction can lead to significant progress in the development of effective treatments against such diseases. Aging is associated with the generation and accumulation of reactive oxygen species (ROS) that are the major contributors to oxidative stress. Oxidative stress is caused because of the imbalance between the production of ROS and their oxidation, which can affect the mitochondrial respiratory chain function, thereby altering the membrane permeability and calcium homeostasis, along with increasing the heteroplasmic mtDNA and weakening the mitochondrial defense systems. Mitochondrial dysfunction mainly affects mitochondrial biogenesis and dynamics that are prominent in several age-related NDs. Mitochondrial dysfunction has a crucial role in the pathophysiology of age-related NDs. Several mitochondria targeted strategies, such as enhancing the antioxidant bioavailability via novel delivery systems, identifying unique mitochondrial proteins as specific drug targets, investigating the signaling pathways of mitochondrial biogenesis and dynamics, and identifying effective natural products are potentially effective to counteract mitochondrial dysfunction-related NDs.
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Affiliation(s)
- Hasnaa A Elfawy
- School of Biotechnology, KIIT deemed to be University, Campus XI, Bhubaneswar 751024, Odisha, India
| | - Biswadeep Das
- School of Biotechnology, KIIT deemed to be University, Campus XI, Bhubaneswar 751024, Odisha, India.
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Connor DE, Chaitanya GV, Chittiboina P, McCarthy P, Scott LK, Schrott L, Minagar A, Nanda A, Alexander JS. Variations in the cerebrospinal fluid proteome following traumatic brain injury and subarachnoid hemorrhage. PATHOPHYSIOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY FOR PATHOPHYSIOLOGY 2017; 24:169-183. [PMID: 28549769 PMCID: PMC7303909 DOI: 10.1016/j.pathophys.2017.04.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 04/06/2017] [Accepted: 04/28/2017] [Indexed: 12/19/2022]
Abstract
BACKGROUND Proteomic analysis of cerebrospinal fluid (CSF) has shown great promise in identifying potential markers of injury in neurodegenerative diseases [1-13]. Here we compared CSF proteomes in healthy individuals, with patients diagnosed with traumatic brain injury (TBI) and subarachnoid hemorrhage (SAH) in order to characterize molecular biomarkers which might identify these different clinical states and describe different molecular mechanisms active in each disease state. METHODS Patients presenting to the Neurosurgery service at the Louisiana State University Hospital-Shreveport with an admitting diagnosis of TBI or SAH were prospectively enrolled. Patients undergoing CSF sampling for diagnostic procedures were also enrolled as controls. CSF aliquots were subjected to 2-dimensional gel electrophoresis (2D GE) and spot percentage densities analyzed. Increased or decreased spot expression (compared to controls) was defined in terms of in spot percentages, with spots showing consistent expression change across TBI or SAH specimens being followed up by Matrix-Assisted Laser Desorption/Ionization mass spectrometry (MALDI-MS). Polypeptide masses generated were matched to known standards using a search of the NCBI and/or GenPept databases for protein matches. Eight hundred fifteen separately identifiable polypeptide migration spots were identified on 2D GE gels. MALDI-MS successfully identified 13 of 22 selected 2D GE spots as recognizable polypeptides. RESULTS Statistically significant changes were noted in the expression of fibrinogen, carbonic anhydrase-I (CA-I), peroxiredoxin-2 (Prx-2), both α and β chains of hemoglobin, serotransferrin (Tf) and N-terminal haptoglobin (Hp) in TBI and SAH specimens, as compared to controls. The greatest mean fold change among all specimens was seen in CA-I and Hp at 30.7 and -25.7, respectively. TBI specimens trended toward greater mean increases in CA-I and Prx-2 and greater mean decreases in Hp and Tf. CONCLUSIONS Consistent CSF elevation of CA-I and Prx-2 with concurrent depletion of Hp and Tf may represent a useful combination of biomarkers for the prediction of severity and prognosis following brain injury.
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Affiliation(s)
- David E Connor
- Baptist Health Neurosurgery Arkansas, Little Rock, AR, United States.
| | - Ganta V Chaitanya
- Cardiovascular Research Center, University of Virginia, Charlottesville, VA, United States.
| | - Prashant Chittiboina
- Surgical Neurology Branch, National Institute of Neurological Diseases and Stroke, Bethesda, MD, United States.
| | - Paul McCarthy
- Department of Medicine, Sect. of Nephrology, University of Maryland, Baltimore, MD, United States.
| | - L Keith Scott
- Department of Critical Care Medicine, Louisiana State University Health Sciences Center-Shreveport, LA, United States.
| | - Lisa Schrott
- Department of Pharmacology, Toxicology and Neuroscience, Louisiana State University Health Sciences Center-Shreveport, LA, United States.
| | - Alireza Minagar
- Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, LA, United States.
| | - Anil Nanda
- Department of Neurosurgery, Louisiana State University Health Sciences Center-Shreveport, LA, United States.
| | - J Steven Alexander
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, LA, United States.
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Xiao L, Miwa N. Hydrogen-rich water achieves cytoprotection from oxidative stress injury in human gingival fibroblasts in culture or 3D-tissue equivalents, and wound-healing promotion, together with ROS-scavenging and relief from glutathione diminishment. Hum Cell 2016; 30:72-87. [DOI: 10.1007/s13577-016-0150-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Accepted: 10/24/2016] [Indexed: 12/12/2022]
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Liu W, Lang M, Youdim MBH, Amit T, Sun Y, Zhang Z, Wang Y, Weinreb O. Design, synthesis and evaluation of novel dual monoamine-cholinesterase inhibitors as potential treatment for Alzheimer's disease. Neuropharmacology 2016; 109:376-385. [PMID: 27318273 DOI: 10.1016/j.neuropharm.2016.06.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 06/13/2016] [Accepted: 06/14/2016] [Indexed: 11/18/2022]
Abstract
Current novel therapeutic approach suggests that multifunctional compounds with diverse biological properties and a single bioavailability and pharmacokinetic metabolism, will produce higher significant advantages in treatment of neurodegenerative diseases, such as Alzheimer's disease (AD). Based on this rational, a new class of cholinesterase (ChE)-monoamine oxidase (MAO) inhibitors were designed and synthesized by amalgamating the propargyl moiety of the irreversible selective MAO-B inhibitor, neuroprotective/neurorestorative anti-Parkinsonian drug, rasagiline, into the "N-methyl" position of the ChE inhibitor, anti-AD drug rivastigmine. Initially, we examined the MAO and ChE inhibitory effect of these novel compounds, MT series in vitro and in vivo. Among MT series, MT-031 exhibited higher potency as a dual MAO-A and ChE inhibitor compared to other compounds in acute-treated mice. Additionally, MT-031 was found to increase the striatal levels of dopamine (DA), serotonin (5-HT) and norepinephrine (NE), and prevent the metabolism of DA and 5-HT. Finally, we have demonstrated that MT-031 exerted neuroprotective effect against H2O2-induced neurotoxicity and reactive oxygen species generation in human neuroblastoma SH-SY5Y cells. These findings provide evidence that MT-031 is a potent brain permeable novel multifunctional, neuroprotective and MAO-A/ChE inhibitor, preserves in one molecule entity some of the beneficial properties of its parent drugs, rasagiline and rivastigmine, and thus may be indicated as novel therapeutic approach for AD.
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Affiliation(s)
- Wei Liu
- Eve Topf Centers of Excellence for Neurodegenerative Diseases Research, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Ming Lang
- Institute of New Drug Research, Jinan University College of Pharmacy, Guangzhou, China
| | - Moussa B H Youdim
- Eve Topf Centers of Excellence for Neurodegenerative Diseases Research, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Tamar Amit
- Eve Topf Centers of Excellence for Neurodegenerative Diseases Research, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Yewei Sun
- Institute of New Drug Research, Jinan University College of Pharmacy, Guangzhou, China
| | - Zaijun Zhang
- Institute of New Drug Research, Jinan University College of Pharmacy, Guangzhou, China
| | - Yuqiang Wang
- Institute of New Drug Research, Jinan University College of Pharmacy, Guangzhou, China
| | - Orly Weinreb
- Eve Topf Centers of Excellence for Neurodegenerative Diseases Research, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.
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Current pharmacotherapy and putative disease-modifying therapy for Alzheimer's disease. Neurol Sci 2016; 37:1403-35. [PMID: 27250365 DOI: 10.1007/s10072-016-2625-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 05/24/2016] [Indexed: 12/14/2022]
Abstract
Alzheimer's disease (AD) is an age-related neurodegenerative disease of the central nervous system correlated with the progressive loss of cognition and memory. β-Amyloid plaques, neurofibrillary tangles and the deficiency in cholinergic neurotransmission constitute the major hallmarks of the AD. Two major hypotheses have been implicated in the pathogenesis of AD namely the cholinergic hypothesis which ascribed the clinical features of dementia to the deficit cholinergic neurotransmission and the amyloid cascade hypothesis which emphasized on the deposition of insoluble peptides formed due to the faulty cleavage of the amyloid precursor protein. Current pharmacotherapy includes mainly the acetylcholinesterase inhibitors and N-methyl-D-aspartate receptor agonist which offer symptomatic therapy and does not address the underlying cause of the disease. The disease-modifying therapy has garnered a lot of research interest for the development of effective pharmacotherapy for AD. β and γ-Secretase constitute attractive targets that are focussed in the disease-modifying approach. Potentiation of α-secretase also seems to be a promising approach towards the development of an effective anti-Alzheimer therapy. Additionally, the ameliorative agents that prevent aggregation of amyloid peptide and also the ones that modulate inflammation and oxidative damage associated with the disease are focussed upon. Development in the area of the vaccines is in progress to combat the characteristic hallmarks of the disease. Use of cholesterol-lowering agents also is a fruitful strategy for the alleviation of the disease as a close association between the cholesterol and AD has been cited. The present review underlines the major therapeutic strategies for AD with focus on the new developments that are on their way to amend the current therapeutic scenario of the disease.
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De Luka SR, Ilić AŽ, Janković S, Djordjevich DM, Ćirković S, Milovanovich ID, Stefanović S, Vesković-Moračanin S, Ristić-Djurović JL, Trbovich AM. Subchronic exposure to static magnetic field differently affects zinc and copper content in murine organs. Int J Radiat Biol 2016; 92:140-7. [PMID: 26850041 DOI: 10.3109/09553002.2016.1135266] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
PURPOSE Static magnetic fields (SMF) have been widely used in research, medicine and industry. Since zinc and copper play an important role in biological systems, we studied the effects of the subchronic continuous SMF exposure on their distribution in murine tissues. MATERIALS AND METHODS For 30 days, mice were exposed to inhomogeneous, vertical, downward or upward oriented SMF of 1 mT averaged intensity with spatial gradient in vertical direction. RESULTS SMF decreased the amount of copper and zinc in liver. In brain, zinc levels were increased and copper levels were decreased. In spleen, zinc content was reduced, while copper amount remained unchanged. CONCLUSIONS Subchronic exposure to SMF differently affected copper and zinc content in examined organs, and the changes were more pronounced for the downward oriented field. The outcome could be attributed to the protective, rather than the harmful effect of SMF.
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Affiliation(s)
- Silvio R De Luka
- a Department of Pathological Physiology, School of Medicine , University of Belgrade , Belgrade , Serbia
| | - Andjelija Ž Ilić
- b Institute of Physics , University of Belgrade , Zemun-Belgrade , Serbia
| | - Saša Janković
- c Institute of Meat Hygiene and Technology , Belgrade , Serbia
| | - Drago M Djordjevich
- a Department of Pathological Physiology, School of Medicine , University of Belgrade , Belgrade , Serbia
| | - Saša Ćirković
- b Institute of Physics , University of Belgrade , Zemun-Belgrade , Serbia
| | - Ivan D Milovanovich
- a Department of Pathological Physiology, School of Medicine , University of Belgrade , Belgrade , Serbia
| | | | | | | | - Alexander M Trbovich
- a Department of Pathological Physiology, School of Medicine , University of Belgrade , Belgrade , Serbia
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Puig KL, Kulas JA, Franklin W, Rakoczy SG, Taglialatela G, Brown-Borg HM, Combs CK. The Ames dwarf mutation attenuates Alzheimer's disease phenotype of APP/PS1 mice. Neurobiol Aging 2016; 40:22-40. [PMID: 26973101 DOI: 10.1016/j.neurobiolaging.2015.12.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 12/28/2015] [Accepted: 12/28/2015] [Indexed: 12/21/2022]
Abstract
APP/PS1 double transgenic mice expressing human mutant amyloid precursor protein (APP) and presenilin-1 (PS1) demonstrate robust brain amyloid beta (Aβ) peptide containing plaque deposition, increased markers of oxidative stress, behavioral dysfunction, and proinflammatory gliosis. On the other hand, lack of growth hormone, prolactin, and thyroid-stimulating hormone due to a recessive mutation in the Prop 1 gene (Prop1df) in Ames dwarf mice results in a phenotype characterized by potentiated antioxidant mechanisms, improved learning and memory, and significantly increased longevity in homozygous mice. Based on this, we hypothesized that a similar hormone deficiency might attenuate disease changes in the brains of APP/PS1 mice. To test this idea, APP/PS1 mice were crossed to the Ames dwarf mouse line. APP/PS1, wild-type, df/+, df/df, df/+/APP/PS1, and df/df/APP/PS1 mice were compared at 6 months of age through behavioral testing and assessing amyloid burden, reactive gliosis, and brain cytokine levels. df/df mice demonstrated lower brain growth hormone and insulin-like growth factor 1 concentrations. This correlated with decreased astrogliosis and microgliosis in the df/df/APP/PS1 mice and, surprisingly, reduced Aβ plaque deposition and Aβ 1-40 and Aβ 1-42 concentrations. The df/df/APP/PS1 mice also demonstrated significantly elevated brain levels of multiple cytokines in spite of the attenuated gliosis. These data indicate that the df/df/APP/PS1 line is a unique resource in which to study aging and resistance to disease and suggest that the affected pituitary hormones may have a role in regulating disease progression.
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Affiliation(s)
- Kendra L Puig
- Department of Basic Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA
| | - Joshua A Kulas
- Department of Basic Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA
| | - Whitney Franklin
- Department of Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, TX, USA; Department of Neurology, University of Texas Medical Branch, Galveston, TX, USA
| | - Sharlene G Rakoczy
- Department of Basic Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA
| | - Giulio Taglialatela
- Department of Neurology, University of Texas Medical Branch, Galveston, TX, USA
| | - Holly M Brown-Borg
- Department of Basic Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA
| | - Colin K Combs
- Department of Basic Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA.
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Effect of Amaranthus on Advanced Glycation End-Products Induced Cytotoxicity and Proinflammatory Cytokine Gene Expression in SH-SY5Y Cells. Molecules 2015; 20:17288-308. [PMID: 26393562 PMCID: PMC6332459 DOI: 10.3390/molecules200917288] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 09/11/2015] [Accepted: 09/11/2015] [Indexed: 11/17/2022] Open
Abstract
Amaranthus plants, or spinach, are used extensively as a vegetable and are known to possess medicinal properties. Neuroinflammation and oxidative stress play a major role in the pathogenesis of many neurodegenerative diseases, such as Alzheimer’s disease and Parkinson’s disease. Advanced glycation end-products (AGEs) cause cell toxicity in the human neuronal cell line, SH-SY5Y, through an increase in oxidative stress, as shown by reducing cell viability and increasing cell toxicity in a dose-dependent manner. We found that preincubation of SH-SY5Y cells with either petroleum ether, dichloromethane or methanol extracts of A. lividus and A. tricolor dose-dependently attenuated the neuron toxicity caused by AGEs treatment. Moreover, the results showed that A. lividus and A. tricolor extracts significantly downregulated the gene expression of the pro-inflammatory cytokines, TNF-α, IL-1 and IL-6 genes in AGEs-induced cells. We concluded that A. lividus and A. tricolor extracts not only have a neuroprotective effect against AGEs toxicity, but also have anti-inflammatory activity by reducing pro-inflammatory cytokine gene expression. This suggests that Amaranthus may be useful for treating chronic inflammation associated with neurodegenerative disorders.
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Fakruzzaman M, Ghanem N, Bang JI, Ha AN, Lee KL, Sohn SH, Wang Z, Lee DS, Kong IK. Effect of peroxiredoxin II on the quality and mitochondrial activity of pre-implantation bovine embryos. Anim Reprod Sci 2015; 159:172-83. [DOI: 10.1016/j.anireprosci.2015.06.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 05/26/2015] [Accepted: 06/22/2015] [Indexed: 10/23/2022]
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Chu W, Chepetan A, Zhou D, Shoghi KI, Xu J, Dugan LL, Gropler RJ, Mintun MA, Mach RH. Development of a PET radiotracer for non-invasive imaging of the reactive oxygen species, superoxide, in vivo. Org Biomol Chem 2015; 12:4421-31. [PMID: 24847866 DOI: 10.1039/c3ob42379d] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Reactive oxygen species (ROS) have been implicated in the pathogenesis of a wide range of human disease states and drug toxicities, but development of imaging tools to study ROS biology in vivo remains a challenge. Here we synthesized and validated a novel PET tracer (12) and its (18)F radiolabeled version [(18)F]12 to allow PET ( positron emission tomography) imaging of superoxide in vivo. Initial analysis of ROS reaction kinetics found that compound 12 was rapidly and selectively oxidized by superoxide, but not other ROS. Cell culture studies in EMT6 cells exposed to the cancer chemotherapeutic agent Doxorubicin (DOX), which activates the superoxide-generating enzyme, NADPH oxidase, showed that compound 12 was a sensitive and specific probe for superoxide in cells. The microPET imaging of heart in mice with DOX-induced cardiac inflammation observed 2-fold greater oxidation of [(18)F]12 in the DOX-treated mice compared to controls (p = 0.02), the results were confirmed by distribution studies on organs subsequently removed from the mice and HPLC analysis of [(18)F] radioactivity compounds. These data indicate that compound 12 is a useful PET tracer to imaging ROS in vivo.
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Affiliation(s)
- Wenhua Chu
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA.
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Ligularia fischeri Extract Protects Against Oxidative-Stress-Induced Neurotoxicity in Mice and PC12 Cells. J Med Food 2014; 17:1222-31. [DOI: 10.1089/jmf.2013.3014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Belviranlı M, Okudan N. The effects of Ginkgo biloba extract on cognitive functions in aged female rats: the role of oxidative stress and brain-derived neurotrophic factor. Behav Brain Res 2014; 278:453-61. [PMID: 25446810 DOI: 10.1016/j.bbr.2014.10.032] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 10/20/2014] [Accepted: 10/21/2014] [Indexed: 02/04/2023]
Abstract
The aim of this study was to investigate the effects of Ginkgo biloba extract (GBE) on cognitive functions as well as oxidative stress and brain-derived neurotrophic factor (BDNF) levels in aged female rats. Rats were divided into 4 groups according to age (young vs. aged) and treatment (GBE vs. vehicle). GBE or vehicle was given for 30 d, and a series of behavioral tests were performed. Following behavioral testing, blood samples and brain tissues were obtained for analysis of BDNF, malondialdehyde (MDA), 8-hydroxy-2'-deoxyguanosine (8-OHdG), and glutathione levels, and superoxide dismutase activity. Locomotor activity and anxiety levels were lower in the aged rats. Based on Morris water maze probe trial findings, GBE supplementation increased the number of platform crossings in the aged rats. MDA and 8-OHdG levels were lower in the brain tissue, and BDNF levels were higher in plasma in the rates treated with GBE. Based on these findings, we concluded that GBE supplementation improved cognitive functions by decreasing oxidative damage and increasing the BDNF level in aged female rats.
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Affiliation(s)
- Muaz Belviranlı
- Selçuk University, School of Medicine, Department of Physiology, Konya, Turkey.
| | - Nilsel Okudan
- Selçuk University, School of Medicine, Department of Physiology, Konya, Turkey
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Kostecka A, Sznarkowska A, Meller K, Acedo P, Shi Y, Mohammad Sakil HA, Kawiak A, Lion M, Królicka A, Wilhelm M, Inga A, Zawacka-Pankau J. JNK-NQO1 axis drives TAp73-mediated tumor suppression upon oxidative and proteasomal stress. Cell Death Dis 2014; 5:e1484. [PMID: 25341038 PMCID: PMC4649515 DOI: 10.1038/cddis.2014.408] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Revised: 07/24/2014] [Accepted: 08/18/2014] [Indexed: 12/17/2022]
Abstract
Hyperproliferating cancer cells produce energy mainly from aerobic glycolysis, which results in elevated ROS levels. Thus aggressive tumors often possess enhanced anti-oxidant capacity that impedes many current anti-cancer therapies. Additionally, in ROS-compromised cancer cells ubiquitin proteasome system (UPS) is often deregulated for timely removal of oxidized proteins, thus enabling cell survival. Taken that UPS maintains the turnover of factors controlling cell cycle and apoptosis--such as p53 or p73, it represents a promising target for pharmaceutical intervention. Enhancing oxidative insult in already ROS-compromised cancer cells appears as an attractive anti-tumor scenario. TAp73 is a bona fide tumor suppressor that drives the chemosensitivity of some cancers to cisplatin or γ-radiation. It is an important drug target in tumors where p53 is lost or mutated. Here we discovered a novel synergistic mechanism leading to potent p73 activation and cancer cell death by oxidative stress and inhibition of 20S proteasomes. Using a small-molecule inhibitor of 20S proteasome and ROS-inducer--withaferin A (WA), we found that WA-induced ROS activates JNK kinase and stabilizes phase II anti-oxidant response effector NF-E2-related transcription factor (NRF2). This results in activation of Nrf2 target--NQO1 (NADPH quinone oxidoreductase), and TAp73 protein stabilization. The observed effect was ablated by the ROS scavenger--NAC. Concurrently, stress-activated JNK phosphorylates TAp73 at multiple serine and threonine residues, which is crucial to ablate TAp73/MDM2 complex and to promote TAp73 transcriptional function and induction of robust apoptosis. Taken together our data demonstrate that ROS insult in combination with the inhibition of 20S proteasome and TAp73 activation endows synthetic lethality in cancer cells. Thus, our results may enable the establishment of a novel pharmacological strategy to exploit the enhanced sensitivity of tumors to elevated ROS and proteasomal stress to kill advanced tumors by pharmacological activation of TAp73 using molecules like WA.
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Affiliation(s)
- A Kostecka
- Department of Biotechnology, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Gdansk, Poland
| | - A Sznarkowska
- Department of Biotechnology, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Gdansk, Poland
| | - K Meller
- Department of Biotechnology, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Gdansk, Poland
| | - P Acedo
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Y Shi
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - H A Mohammad Sakil
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - A Kawiak
- Department of Biotechnology, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Gdansk, Poland
| | - M Lion
- Centre for Integrative Biology, CIBIO, University of Trento, Mattarello, Italy
| | - A Królicka
- Department of Biotechnology, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Gdansk, Poland
| | - M Wilhelm
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - A Inga
- Centre for Integrative Biology, CIBIO, University of Trento, Mattarello, Italy
| | - J Zawacka-Pankau
- 1] Department of Biotechnology, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Gdansk, Poland [2] Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
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Méndez-Garrido A, Hernández-Rodríguez M, Zamorano-Ulloa R, Correa-Basurto J, Mendieta-Wejebe JE, Ramírez-Rosales D, Rosales-Hernández MC. In Vitro Effect of H2O2, Some Transition Metals and Hydroxyl Radical Produced Via Fenton and Fenton-Like Reactions, on the Catalytic Activity of AChE and the Hydrolysis of ACh. Neurochem Res 2014; 39:2093-104. [DOI: 10.1007/s11064-014-1400-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 07/21/2014] [Accepted: 07/24/2014] [Indexed: 10/24/2022]
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Yoshitomi T, Nagasaki Y. Reactive oxygen species-scavenging nanomedicines for the treatment of oxidative stress injuries. Adv Healthc Mater 2014; 3:1149-61. [PMID: 24482427 DOI: 10.1002/adhm.201300576] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Revised: 01/06/2014] [Indexed: 12/14/2022]
Abstract
This Progress Report describes a development of two types of reactive oxygen species (ROS)-scavenging nanomedicines for the treatment of oxidative stress injuries, referred to as pH-sensitive redox nanoparticle (RNP(N) ) and pH-insensitive redox nanoparticle (RNP(O) ), which are prepared by self-assembling amphiphilic block copolymers possessing nitroxide radicals as a side chain of hydrophobic segment via amine and ether linkages, respectively. Due to a protonation of amino groups in hydrophobic core, RNP(N) disintegrates in low pH environments such as ischemic, inflamed, and tumor tissues, resulting in increased ROS-scavenging activity because of the exposed nitroxide radicals from the core. Utilizing pH-responsiveness of RNP(N) , it shows remarkable therapeutic effects on oxidative stress injuries such as renal and cerebral ischemia-reperfusion injuries after intravenous administration. Moreover, RNP(N) shows an enhancement of the activity of anticancer drugs by suppression of activation of transcription factors in tumor due to the ROS scavenging. On the other hand, orally administered RNP(O) has notable characteristics such as preferential accumulation in mucosa and inflamed area of gastrointestinal tract and no uptake into blood stream. Based on these characters, RNP(O) shows a remarkable therapeutic effect for the gastrointestinal inflammation without any adverse effects. Thus, ROS-scavenging nanomedicines have therapeutic efficacy in numerous oxidative stress diseases.
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Affiliation(s)
- Toru Yoshitomi
- Department of Chemistry, Graduate School of Science; The University of Tokyo; Bunkyo-ku 7-3-1 Tokyo 113-0033 Japan
| | - Yukio Nagasaki
- Department of Materials Sciences, Graduate School of Pure and Applied Sciences; University of Tsukuba; Tennoudai 1-1-1 Tsukuba Ibaraki 305-8573 Japan
- Master's School of Medical Sciences, Graduate School of Comprehensive Human Sciences; University of Tsukuba; Tennoudai 1-1-1 Tsukuba Ibaraki 305-8573 Japan
- Satellite Laboratory, International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS); University of Tsukuba; Tennoudai 1-1-1 Tsukuba Ibaraki 305-8573 Japan
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Zhang Y, Chang FM, Huang J, Junco JJ, Maffi SK, Pridgen HI, Catano G, Dang H, Ding X, Yang F, Kim DJ, Slaga TJ, He R, Wei SJ. DSSylation, a novel protein modification targets proteins induced by oxidative stress, and facilitates their degradation in cells. Protein Cell 2014; 5:124-40. [PMID: 24515614 PMCID: PMC3956975 DOI: 10.1007/s13238-013-0018-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 12/19/2013] [Indexed: 02/02/2023] Open
Abstract
Timely removal of oxidatively damaged proteins is critical for cells exposed to oxidative stresses; however, cellular mechanism for clearing oxidized proteins is not clear. Our study reveals a novel type of protein modification that may play a role in targeting oxidized proteins and remove them. In this process, DSS1 (deleted in split hand/split foot 1), an evolutionally conserved small protein, is conjugated to proteins induced by oxidative stresses in vitro and in vivo, implying oxidized proteins are DSS1 clients. A subsequent ubiquitination targeting DSS1-protein adducts has been observed, suggesting the client proteins are degraded through the ubiquitin-proteasome pathway. The DSS1 attachment to its clients is evidenced to be an enzymatic process modulated by an unidentified ATPase. We name this novel protein modification as DSSylation, in which DSS1 plays as a modifier, whose attachment may render target proteins a signature leading to their subsequent ubiquitination, thereby recruits proteasome to degrade them.
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Affiliation(s)
- Yinghao Zhang
- Medical Research Division, Regional Academic Health Center, Edinburg, TX 78541 USA
- State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
| | - Fang-Mei Chang
- Medical Research Division, Regional Academic Health Center, Edinburg, TX 78541 USA
| | - Jianjun Huang
- Medical Research Division, Regional Academic Health Center, Edinburg, TX 78541 USA
- Department of Clinical Biochemistry, Xiangya Medical College, Central South University, Changsha, 410013 China
| | - Jacob J. Junco
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229 USA
| | - Shivani K. Maffi
- Medical Research Division, Regional Academic Health Center, Edinburg, TX 78541 USA
- Department of Molecular Medicine, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229 USA
| | - Hannah I. Pridgen
- Medical Research Division, Regional Academic Health Center, Edinburg, TX 78541 USA
| | - Gabriel Catano
- Department of Medicine, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229 USA
| | - Hong Dang
- Cystic Fibrosis and Pulmonary Diseases Research and Treatment Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 USA
| | - Xiang Ding
- Laboratory of Proteomics, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
| | - Fuquan Yang
- Laboratory of Proteomics, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
| | - Dae Joon Kim
- Medical Research Division, Regional Academic Health Center, Edinburg, TX 78541 USA
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229 USA
- The Cancer Therapy and Research Center, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229 USA
| | - Thomas J. Slaga
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229 USA
- The Cancer Therapy and Research Center, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229 USA
| | - Rongqiao He
- State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
| | - Sung-Jen Wei
- Medical Research Division, Regional Academic Health Center, Edinburg, TX 78541 USA
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229 USA
- The Cancer Therapy and Research Center, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229 USA
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Vanhees K, Vonhögen IGC, van Schooten FJ, Godschalk RWL. You are what you eat, and so are your children: the impact of micronutrients on the epigenetic programming of offspring. Cell Mol Life Sci 2014; 71:271-85. [PMID: 23892892 PMCID: PMC11113902 DOI: 10.1007/s00018-013-1427-9] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 07/10/2013] [Accepted: 07/15/2013] [Indexed: 02/07/2023]
Abstract
The research field of fetal programming has developed tremendously over the years and increasing knowledge suggests that both maternal and paternal unbalanced diet can have long-lasting effects on the health of offspring. Studies implicate that macronutrients play an important role in fetal programming, although the importance of micronutrients is also becoming increasingly apparent. Folic acid and vitamins B2, B6 and B12 are essential for one-carbon metabolism and are involved in DNA methylation. They can therefore influence the programming of the offspring's epigenome. Also, other micronutrients such as vitamins A and C, iron, chromium, zinc and flavonoids play a role in fetal programming. Since it is estimated that approximately 78 % of pregnant women in the US take vitamin supplements during pregnancy, more attention should be given to the long-term effects of these supplements on offspring. In this review we address several different studies which illustrate that an unbalanced diet prior and during pregnancy, regarding the intake of micronutrients of both mother and father, can have long-lasting effects on the health of adult offspring.
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Affiliation(s)
- Kimberly Vanhees
- Department of Toxicology, School for Nutrition, Toxicology and Metabolism (NUTRIM), Maastricht UMC+, Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands,
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34
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Hanschmann EM, Godoy JR, Berndt C, Hudemann C, Lillig CH. Thioredoxins, glutaredoxins, and peroxiredoxins--molecular mechanisms and health significance: from cofactors to antioxidants to redox signaling. Antioxid Redox Signal 2013; 19:1539-605. [PMID: 23397885 PMCID: PMC3797455 DOI: 10.1089/ars.2012.4599] [Citation(s) in RCA: 493] [Impact Index Per Article: 44.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 02/01/2013] [Accepted: 02/07/2013] [Indexed: 12/19/2022]
Abstract
Thioredoxins (Trxs), glutaredoxins (Grxs), and peroxiredoxins (Prxs) have been characterized as electron donors, guards of the intracellular redox state, and "antioxidants". Today, these redox catalysts are increasingly recognized for their specific role in redox signaling. The number of publications published on the functions of these proteins continues to increase exponentially. The field is experiencing an exciting transformation, from looking at a general redox homeostasis and the pathological oxidative stress model to realizing redox changes as a part of localized, rapid, specific, and reversible redox-regulated signaling events. This review summarizes the almost 50 years of research on these proteins, focusing primarily on data from vertebrates and mammals. The role of Trx fold proteins in redox signaling is discussed by looking at reaction mechanisms, reversible oxidative post-translational modifications of proteins, and characterized interaction partners. On the basis of this analysis, the specific regulatory functions are exemplified for the cellular processes of apoptosis, proliferation, and iron metabolism. The importance of Trxs, Grxs, and Prxs for human health is addressed in the second part of this review, that is, their potential impact and functions in different cell types, tissues, and various pathological conditions.
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Affiliation(s)
- Eva-Maria Hanschmann
- Institute for Medical Biochemistry and Molecular Biology, University Medicine, Ernst-Moritz Arndt University, Greifswald, Germany
| | - José Rodrigo Godoy
- Institute of Physiology, Pathophysiology and Biophysics, Department of Biomedical Sciences, University of Veterinary Medicine, Vienna, Austria
| | - Carsten Berndt
- Department of Neurology, Medical Faculty, Heinrich-Heine University, Duesseldorf, Germany
| | - Christoph Hudemann
- Institute of Laboratory Medicine, Molecular Diagnostics, Philipps University, Marburg, Germany
| | - Christopher Horst Lillig
- Institute for Medical Biochemistry and Molecular Biology, University Medicine, Ernst-Moritz Arndt University, Greifswald, Germany
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Neuroprotective Role of a Novel Copper Chelator against Aβ 42 Induced Neurotoxicity. Int J Alzheimers Dis 2013; 2013:567128. [PMID: 24159420 PMCID: PMC3789492 DOI: 10.1155/2013/567128] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 07/30/2013] [Accepted: 07/31/2013] [Indexed: 11/18/2022] Open
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disease and associated with the extracellular deposits of amyloid- β peptide in hippocampus region. Metal ions like Cu, Fe and Zn are known to associate with the amyloid beta (A β ) at high concentration and interaction of these ions with soluble and aggregated forms of A β peptide help in development of AD. Here we showed Cu mediated neurotoxicity in the eye tissues of transgenic Drosophila expressing human amyloid β and its rescue through a novel Cu chelator. In this context, we have synthesised and characterized the compound L 2,6-Pyridinedicarboxylic acid, 2,6-bis[2-[(4-carboxyphenyl) methylene] hydrazide] by Mass spectra (MS) and Elemental analysis (EA). The Cu chelation potential of the compound L is tested in vivo in Drosophila. Oral administration of Copper to the transgenic larvae resulted in severe degeneration in eye tissues, which was rescued by the supplementation of compound L. The levels of anti-oxidant markers like SOD and MDA were measured in compound L treated flies and found a significant rescue (P < 0.001). Further rescue of the eye degeneration phenotypes as revealed by SEM affirm the role of copper in A β toxicity. Hence, use of compound L, an amidoamine derivative, could be a possible therapeutic measure for A β induced neurotoxicity.
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Paulsen BDS, de Moraes Maciel R, Galina A, Souza da Silveira M, dos Santos Souza C, Drummond H, Nascimento Pozzatto E, Silva H, Chicaybam L, Massuda R, Setti-Perdigão P, Bonamino M, Belmonte-de-Abreu PS, Castro NG, Brentani H, Rehen SK. Altered oxygen metabolism associated to neurogenesis of induced pluripotent stem cells derived from a schizophrenic patient. Cell Transplant 2013; 21:1547-59. [PMID: 21975034 DOI: 10.3727/096368911x600957] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Schizophrenia has been defined as a neurodevelopmental disease that causes changes in the process of thoughts, perceptions, and emotions, usually leading to a mental deterioration and affective blunting. Studies have shown altered cell respiration and oxidative stress response in schizophrenia; however, most of the knowledge has been acquired from postmortem brain analyses or from nonneural cells. Here we describe that neural cells, derived from induced pluripotent stem cells generated from skin fibroblasts of a schizophrenic patient, presented a twofold increase in extramitochondrial oxygen consumption as well as elevated levels of reactive oxygen species (ROS), when compared to controls. This difference in ROS levels was reverted by the mood stabilizer valproic acid. Our model shows evidence that metabolic changes occurring during neurogenesis are associated with schizophrenia, contributing to a better understanding of the development of the disease and highlighting potential targets for treatment and drug screening.
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Affiliation(s)
- Bruna da Silveira Paulsen
- Laboratório Nacional de Células-Tronco Embrionárias, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Jiang P, Sheng Y, Ji L. The age-related change of glutathione antioxidant system in mice liver. Toxicol Mech Methods 2013; 23:396-401. [PMID: 23343351 DOI: 10.3109/15376516.2013.769655] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Cellular glutathione (GSH) antioxidant system is an important defensive system of the body, which is crucial in the protection against oxidative stress-induced liver injury. The present study was designed to observe the difference of this system in the liver of mice with 1-month- and 12-month-old. Liver reduced GSH level was showed no difference between these two groups of mice. Next, the results showed that liver glutamate-cysteine ligase (GCL) activity was higher in mice of 1-month- than 12-month-old, while glutathione-S-transferase (GST) activity was higher in mice of 12-month- than 1-month-old. Further results showed that the higher activity of liver GCL in 1-month-old mice was due to the higher expression of catalytic subunit of GCL (GCLc) mRNA, while the higher activity of liver GST in 12-month-old mice might be due to the higher expression of GSTA1, GSTA2, GSTP1 and GSTP2 mRNA. Taken together, our results revealed the age-related change of liver GSH antioxidant system in mice, which may be helpful for elucidating some age-related liver injury or diseases.
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Affiliation(s)
- Ping Jiang
- The MOE Key Laboratory for Standardization of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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38
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Solution and solid state study of copper(II) ternary complexes with some dipeptides presence in Aβ-42 peptide and methionine. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.02.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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39
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Lo KY, Zhu Y, Tsai HF, Sun YS. Effects of shear stresses and antioxidant concentrations on the production of reactive oxygen species in lung cancer cells. BIOMICROFLUIDICS 2013; 7:64108. [PMID: 24396542 PMCID: PMC3862592 DOI: 10.1063/1.4836675] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 11/16/2013] [Indexed: 05/16/2023]
Abstract
Reactive oxygen species (ROS) are known to be a key factor in the development of cancer, and many exogenous sources are supposed to be related to the formation of ROS. In this paper, a microfluidic chip was developed for studying the production of ROS in lung cancer cells under different chemical and physical stimuli. This chip has two unique features: (1) five relative concentrations of 0, 1/8, 1/2, 7/8, and 1 are achieved in the culture regions; (2) a shear stress gradient is produced inside each of the five culture areas. Lung cancer cells were seeded inside this biocompatible chip for investigating their response to different concentrations of H2O2, a chemical stimulus known to increase the production of ROS. Then the effect of shear stress, a physical stimulus, on lung cancer cells was examined, showing that the production of ROS was increased in response to a larger shear stress. Finally, two antioxidants, α-tocopherol and ferulic acid, were used to study their effects on reducing ROS. It was found that high-dose α-tocopherol was not able to effectively eliminate the ROS produced inside cells. This counter effect was not observed in cells cultured in a traditional chamber slide, where no shear stress was present. This result suggests that the current microfluidic chip provides an in vitro platform best mimicking the physiological condition where cells are under circulating conditions.
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Affiliation(s)
- Kai-Yin Lo
- Department of Agricultural Chemistry, National Taiwan University, Taipei City 10617, Taiwan
| | - Yun Zhu
- Department of Agricultural Chemistry, National Taiwan University, Taipei City 10617, Taiwan
| | - Hsieh-Fu Tsai
- Research Center for Applied Sciences, Academia Sinica, Taipei City 11529, Taiwan
| | - Yung-Shin Sun
- Department of Physics, Fu-Jen Catholic University, New Taipei City 24205, Taiwan
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40
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Chao X, He X, Yang Y, Zhou X, Jin M, Liu S, Cheng Z, Liu P, Wang Y, Yu J, Tan Y, Huang Y, Qin J, Rapposelli S, Pi R. Design, synthesis and pharmacological evaluation of novel tacrine–caffeic acid hybrids as multi-targeted compounds against Alzheimer’s disease. Bioorg Med Chem Lett 2012; 22:6498-502. [DOI: 10.1016/j.bmcl.2012.08.036] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 08/07/2012] [Accepted: 08/10/2012] [Indexed: 11/27/2022]
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41
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Hegde ML, Banerjee S, Hegde PM, Bellot LJ, Hazra TK, Boldogh I, Mitra S. Enhancement of NEIL1 protein-initiated oxidized DNA base excision repair by heterogeneous nuclear ribonucleoprotein U (hnRNP-U) via direct interaction. J Biol Chem 2012; 287:34202-11. [PMID: 22902625 DOI: 10.1074/jbc.m112.384032] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Repair of oxidized base lesions in the human genome, initiated by DNA glycosylases, occurs via the base excision repair pathway using conserved repair and some non-repair proteins. However, the functions of the latter noncanonical proteins in base excision repair are unclear. Here we elucidated the role of heterogeneous nuclear ribonucleoprotein-U (hnRNP-U), identified in the immunoprecipitate of human NEIL1, a major DNA glycosylase responsible for oxidized base repair. hnRNP-U directly interacts with NEIL1 in vitro via the NEIL1 common interacting C-terminal domain, which is dispensable for its enzymatic activity. Their in-cell association increases after oxidative stress. hnRNP-U stimulates the NEIL1 in vitro base excision activity for 5-hydroxyuracil in duplex, bubble, forked, or single-stranded DNA substrate, primarily by enhancing product release. Using eluates from FLAG-NEIL1 immunoprecipitates from human cells, we observed 3-fold enhancement in complete repair activity after oxidant treatment. The lack of such enhancement in hnRNP-U-depleted cells suggests its involvement in repairing enhanced base damage after oxidative stress. The NEIL1 disordered C-terminal region binds to hnRNP-U at equimolar ratio with high affinity (K(d) = ∼54 nm). The interacting regions in hnRNP-U, mapped to both termini, suggest their proximity in the native protein; these are also disordered, based on PONDR (Predictor of Naturally Disordered Regions) prediction and circular dichroism spectra. Finally, depletion of hnRNP-U and NEIL1 epistatically sensitized human cells at low oxidative genome damage, suggesting that the hnRNP-U protection of cells after oxidative stress is largely due to enhancement of NEIL1-mediated repair.
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Affiliation(s)
- Muralidhar L Hegde
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch (UTMB), Galveston, Texas 77555-1079, USA
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García S, Cuscó C, Brissos RF, Torrents E, Caubet A, Gamez P. Dual role of Cu²⁺ ions on the aggregation and degradation of soluble Aβ oligomers and protofibrils investigated by fluorescence spectroscopy and AFM. J Inorg Biochem 2012; 116:26-36. [PMID: 23010326 DOI: 10.1016/j.jinorgbio.2012.07.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 06/11/2012] [Accepted: 07/05/2012] [Indexed: 11/20/2022]
Abstract
The neuropathological character of copper(II) ions (Cu(2+)) upon interaction with soluble human amyloid-β(1-42) that subsequently generates senile plaques and/or reactive oxygen species (ROS) is considered as one of the very important features of Alzheimer's disease. The present study carried out by using fluorescence spectroscopy and atomic-force microscopy (AFM) indeed confirms the dual role played by Cu(2+), namely as mediator of protein aggregation and as generator of ROS leading to irreversible protein alteration, which most likely involve two distinct copper-binding sites. The AFM investigations clearly evidence the copper-induced aggregation of Aβ oligomers and protofibrils, while comparative fluorescence measurements with copper and zinc reveals the crucial involvement of redox-active copper in the generation of Aβ-cross-linked structures.
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Affiliation(s)
- Silvia García
- Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
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Zhao H, Niu Q, Li X, Liu T, Xu Y, Han H, Wang W, Fan N, Tian Q, Zhang H, Wang Z. Long-term resveratrol consumption protects ovariectomized rats chronically treated with d-galactose from developing memory decline without effects on the uterus. Brain Res 2012; 1467:67-80. [DOI: 10.1016/j.brainres.2012.05.040] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 05/14/2012] [Accepted: 05/21/2012] [Indexed: 02/07/2023]
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Aiken CT, Kaake RM, Wang X, Huang L. Oxidative stress-mediated regulation of proteasome complexes. Mol Cell Proteomics 2011; 10:R110.006924. [PMID: 21543789 DOI: 10.1074/mcp.m110.006924] [Citation(s) in RCA: 238] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Oxidative stress has been implicated in aging and many human diseases, notably neurodegenerative disorders and various cancers. The reactive oxygen species that are generated by aerobic metabolism and environmental stressors can chemically modify proteins and alter their biological functions. Cells possess protein repair pathways to rescue oxidized proteins and restore their functions. If these repair processes fail, oxidized proteins may become cytotoxic. Cell homeostasis and viability are therefore dependent on the removal of oxidatively damaged proteins. Numerous studies have demonstrated that the proteasome plays a pivotal role in the selective recognition and degradation of oxidized proteins. Despite extensive research, oxidative stress-triggered regulation of proteasome complexes remains poorly defined. Better understanding of molecular mechanisms underlying proteasome function in response to oxidative stress will provide a basis for developing new strategies aimed at improving cell viability and recovery as well as attenuating oxidation-induced cytotoxicity associated with aging and disease. Here we highlight recent advances in the understanding of proteasome structure and function during oxidative stress and describe how cells cope with oxidative stress through proteasome-dependent degradation pathways.
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Affiliation(s)
- Charity T Aiken
- Department of Physiology and Biophysics, University of California, Irvine, CA 92697-4560, USA
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Shaerzadeh F, Alamdary SZ, Esmaeili MA, Sarvestani NN, Khodagholi F. Neuroprotective effect of Salvia sahendica is mediated by restoration of mitochondrial function and inhibition of endoplasmic reticulum stress. Neurochem Res 2011; 36:2216-26. [PMID: 21769643 DOI: 10.1007/s11064-011-0545-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/07/2011] [Indexed: 01/18/2023]
Abstract
Herein, we investigated the protective effect of Salvia sahendica against H(2)O(2)-induced cell death in rat pheochromocytoma (PC12) cells. Our data show that S. sahendica blocks apoptosis pathway by inhibition of cytochrome c release from mitochondria and leakage of calcium from endoplasmic reticulum. It also activates/inactivates two members of Bcl-2 family, Bax and Bcl-2. Bax inhibition and Bcl-2 activation suppress release of cytochrome c from mitochondria that prevents cleavage of caspase-3. Besides S. sahendica suppresses ER stress via attenuation of intracellular levels of calcium. Suppression of ER stress decreased calpain activation and subsequently cleavage of caspase-12. Altogether, these results indicate that S. sahendica protects PC12 cells treated with H(2)O(2) via suppression of upstream factors of apoptosis pathway. While oxidative stress is an early event in Alzheimer disease, it seems that S. sahendica prevents deleterious effects of reactive oxygen species by stabilizing mitochondrial membranes and inhibiting ER stress.
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Affiliation(s)
- Fatemeh Shaerzadeh
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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46
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Runchel C, Matsuzawa A, Ichijo H. Mitogen-activated protein kinases in mammalian oxidative stress responses. Antioxid Redox Signal 2011; 15:205-18. [PMID: 21050144 DOI: 10.1089/ars.2010.3733] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
All aerobic organisms are exposed to oxidative stress during their lifetime and are required to respond appropriately for maintenance of their survival and homeostasis. Sustained exposure to oxidative stress has devastating effects in organisms, and, not surprisingly, oxidative stress has been implicated in numerous human diseases. Therefore, an understanding of how mammals respond to oxidative stress is crucial both biologically and clinically. Intracellular signaling pathways, which are activated in response to excessive oxygen radicals, play essential roles in overcoming oxidative stress. The mitogen-activated protein kinase (MAPK) signaling pathways are involved in diverse physiological processes, and are critical for induction of oxidative stress responses. In this review, we will discuss the physiological roles of MAPKs in oxidative stress, the upstream signaling pathways leading to MAPK activation, their regulation, and the MAPK downstream substrates, with a focus on mammalian systems.
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Affiliation(s)
- Christopher Runchel
- Laboratory of Cell Signaling, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Japan
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47
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Neuroprotective Effects of White Tea Against Oxidative Stress-Induced Toxicity in Striatal Cells. Neurotox Res 2011; 20:372-8. [DOI: 10.1007/s12640-011-9252-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Revised: 05/25/2011] [Accepted: 06/14/2011] [Indexed: 12/14/2022]
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48
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Zhao HF, Li Q, Li Y. Long-term ginsenoside administration prevents memory loss in aged female C57BL/6J mice by modulating the redox status and up-regulating the plasticity-related proteins in hippocampus. Neuroscience 2011; 183:189-202. [PMID: 21463662 DOI: 10.1016/j.neuroscience.2011.03.048] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 03/22/2011] [Accepted: 03/22/2011] [Indexed: 12/13/2022]
Abstract
Memory impairment is considered to be one of the most prominent consequences of aging. Deterioration of memory begins in advance of old age in animals, including humans. The generation of reactive oxygen species (ROS) and/or free radicals-induced oxidative stress which is the major age-related changes, can lead to hippocampus damage and increase vulnerability to impaired learning and memory. Ginsenoside, the effective ingredient of ginseng, has been reported to have a neuron beneficial effect. In the present study, C57BL/6J mice aged 12 months were chronically treated with ginsenoside (three dose groups were given ginsenoside in drinking water for 8 months, the concentration of ginsenoside in drinking water was 0.028%, 0.056%, and 0.112% (w/v), respectively). Placebo-treated aged mice and young ones (4 months old) were used as controls. The efficacious effect of ginsenoside was manifested in the amelioration of memory impairment in aged mice by Morris water maze and step-down tests. Total superoxide dismutase (T-SOD), glutathione peroxidase (GSH-Px), and thiobarbituric acid reactive substances (TBARS) have been used as the biomarkers of oxidative stress. In ginsenoside treated groups, the activities of T-SOD and GSH-Px markedly increased, and the levels of TBARS and the content of protein carbonyl decreased significantly in serum and in hippocampus. The activation of lipofuscin formation, disruption or loss of cristae in mitochondria, the irregular nucleus and condensed chromatin laid against the nuclear membrane in pyramidal cells of hippocampal CA1 region, which are all related to oxidative stress, were also reduced after ginsenoside treatment. Processes of memory formation and functional plasticity are associated with postsynaptic density-95 (PSD-95), protein kinase Cγ subunit (PKCγ) and brain derived neurotrophic factor (BDNF). In the present study, we found that long-term ginsenoside treatment prevented age-related reductions of PSD-95, PKCγ, and BDNF in the hippocampus. These results demonstrated that long-term ginsenoside administration may prevent memory loss in aged C57BL/6J mice by modulating the redox status and up-regulating the plasticity-related proteins in hippocampus.
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Affiliation(s)
- H F Zhao
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi 030001, PR China
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Zara S, Di Stefano A, Nasuti C, Rapino M, Patruno A, Pesce M, Sozio P, Cerasa LS, Cataldi A. NOS-mediated morphological and molecular modifications in rats infused with Aβ (1-40), as a model of Alzheimer's disease, in response to a new lipophilic molecular combination codrug-1. Exp Gerontol 2011; 46:273-81. [DOI: 10.1016/j.exger.2010.11.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Revised: 09/24/2010] [Accepted: 11/02/2010] [Indexed: 11/30/2022]
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50
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Yin F, Liu J, Ji X, Wang Y, Zidichouski J, Zhang J. Baicalin prevents the production of hydrogen peroxide and oxidative stress induced by Aβ aggregation in SH-SY5Y cells. Neurosci Lett 2011; 492:76-9. [PMID: 21276834 DOI: 10.1016/j.neulet.2011.01.055] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 01/19/2011] [Accepted: 01/21/2011] [Indexed: 11/25/2022]
Abstract
Alzheimer's disease (AD) is a common form of neurodegenerative disease. Mounting evidence suggests that metal ions play a key role in the aggregation of amyloid β peptide (Aβ), which acts as a factor or cofactor in the etiopathogenesis of AD. Therefore, inhibition of Aβ aggregation emerges as a potential approach for the treatment of AD. We have found that baicalin can interact with copper directly and inhibits Aβ1-42 aggregation. In addition, baicalin protects SH-SY5Y cells from oxidative injuries induced by Aβ1-42 aggregation through decreasing H(2)O(2) production that is normally formed as a deleterious by-product of beta amyloid aggregation and the formation of plaques. Taken together, these data indicate that baicalin may be a potential agent to inhibit Aβ aggregation and thereby delay, mitigate or modify the progression of neurodegenerative diseases such as AD.
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Affiliation(s)
- Fei Yin
- Research Center of Medicinal Chemistry and Chemical Biology, Chongqing Technology and Business University, Chongqing 400067, PR China
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