1
|
Ansari MA, Al-Jarallah A, Rao MS, Babiker A, Bensalamah K. Upregulation of NADPH-oxidase, inducible nitric oxide synthase and apoptosis in the hippocampus following impaired insulin signaling in the rats: Development of sporadic Alzheimer's disease. Brain Res 2024; 1834:148890. [PMID: 38552936 DOI: 10.1016/j.brainres.2024.148890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/21/2024] [Accepted: 03/26/2024] [Indexed: 04/06/2024]
Abstract
NADPH-oxidase (NOX) is a multi-subunit enzyme complex. The upregulation of NOX causes massive production of superoxide (O2¯), which avidly reacts with nitric oxide (NO) and increases cellular reactive oxygen/nitrogen species (ROS/RNS). Increased ROS/RNS plays pivotal role in the sporadic Alzheimer's disease (sAD) development and brain damage following impaired insulin signaling. Hence, this study aimed to examine early-time course of changes in NOX and NOS expression, and apoptotic proteins in the rats hippocampi following insulin signaling impairment [induced by STZ injection; intraperitoneal (IP) or in cerebral ventricles (ICV)]. Early effects (1, 3, or 6 weeks) on the NOX activity, translocation of NOX subunits from cytosol to the membrane, NO-synthases [neuronal-, inducible- and endothelial-NOS; nNOS, iNOS and eNOS], The Rac-1 protein expression, levels of NO and O2¯, cytochrome c release, caspase-3 and 9 activations (cleavage) were studied. STZ injection (in both models) increased NOX activity, O2¯ production, and enhanced cytosolic subunits translocation into membrane. The iNOS but not nNOS and eNOS expression and NO levels were increased in STZ treated rats. Finally, STZ injection increased cytochrome c release, caspase-3 and 9 activations in a manner that was significantly associated with levels of O2¯ and NO in the hippocampus. ICV-STZ administration resulted in significant profound changes over the IP route. In conclusion, impairment in insulin function induces early changes in ROS/RNS contents through NOX and iNOS upregulation and neuronal apoptosis in the hippocampus. Our results could mechanistically explain the role of impaired insulin function in the development of sAD.
Collapse
Affiliation(s)
- Mubeen A Ansari
- Department of Pharmacology and Toxicology, Kuwait University, Kuwait City, Safat 13110, Kuwait.
| | - Aishah Al-Jarallah
- Department of Biochemistry, Kuwait University, Kuwait City, Safat 13110, Kuwait
| | - Muddanna S Rao
- Department of Anatomy, Kuwait University, Kuwait City, Safat 13110, Kuwait
| | - Ahmed Babiker
- Faculty of Medicine, Kuwait University, Kuwait City, Safat 13110, Kuwait
| | - Khaled Bensalamah
- Faculty of Medicine, Kuwait University, Kuwait City, Safat 13110, Kuwait
| |
Collapse
|
2
|
Mairuae N, Palachai N, Noisa P. An anthocyanin-rich extract from Zea mays L. var. ceratina alleviates neuronal cell death caused by hydrogen peroxide-induced cytotoxicity in SH-SY5Y cells. BMC Complement Med Ther 2024; 24:162. [PMID: 38632534 PMCID: PMC11025150 DOI: 10.1186/s12906-024-04458-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 03/27/2024] [Indexed: 04/19/2024] Open
Abstract
The incidence of dementia is rising, with neuronal cell death from oxidative stress and apoptosis recognized as a significant contributor to its development. However, effective strategies to combat this condition are lacking, necessitating further investigation. This study aimed to assess the potential of an anthocyanin-rich extract from Zea mays L. var. ceratina (AZC) in alleviating neuronal cell death.Neurotoxicity was induced in SH-SY5Y cells using hydrogen peroxide (H2O2) at a concentration of 200 µM. Cells were pretreated with varying doses (31.25 and 62.5 µg/mL) of AZC. Cell viability was assessed using the MTT assay, and molecular mechanisms including reactive oxygen species (ROS) levels, antioxidant enzyme activities (catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GSH-Px)), malondialdehyde (MDA) levels for oxidative stress, and the activation of extracellular signal-regulated kinases 1 and 2 (ERK1/2), cAMP response element-binding protein (CREB), and apoptotic factors (B-cell lymphoma 2 (Bcl-2), caspase 3) were explored.Results showed that AZC significantly improved cell viability, reduced ROS production and MDA levels, and downregulated caspase 3 expression. It enhanced CAT, SOD, and GSH-Px activities, activated ERK1/2 and CREB, and upregulated Bcl-2 expression. These findings support the neuroprotective effects of AZC, suggesting it activates ERK1/2, leading to CREB activation and subsequent upregulation of Bcl-2 expression while suppressing caspase 3. AZC may mitigate neuronal cell death by reducing ROS levels through enhanced scavenging enzyme activities.In conclusion, this study underscores the potential of AZC as a neuroprotective agent against neuronal cell death. However, further investigations including toxicity assessments, in vivo studies, and clinical trials are necessary to validate its benefits in neuroprotection.
Collapse
Affiliation(s)
- Nootchanat Mairuae
- Faculty of Medicine, Mahasarakham University, Mahasarakham, 44000, Thailand
| | - Nut Palachai
- Faculty of Medicine, Mahasarakham University, Mahasarakham, 44000, Thailand.
| | - Parinya Noisa
- School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
| |
Collapse
|
3
|
Del Rosario Hernández T, Gore SV, Kreiling JA, Creton R. Drug repurposing for neurodegenerative diseases using Zebrafish behavioral profiles. Biomed Pharmacother 2024; 171:116096. [PMID: 38185043 PMCID: PMC10922774 DOI: 10.1016/j.biopha.2023.116096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/18/2023] [Accepted: 12/26/2023] [Indexed: 01/09/2024] Open
Abstract
Drug repurposing can accelerate drug development while reducing the cost and risk of toxicity typically associated with de novo drug design. Several disorders lacking pharmacological solutions and exhibiting poor results in clinical trials - such as Alzheimer's disease (AD) - could benefit from a cost-effective approach to finding new therapeutics. We previously developed a neural network model, Z-LaP Tracker, capable of quantifying behaviors in zebrafish larvae relevant to cognitive function, including activity, reactivity, swimming patterns, and optomotor response in the presence of visual and acoustic stimuli. Using this model, we performed a high-throughput screening of FDA-approved drugs to identify compounds that affect zebrafish larval behavior in a manner consistent with the distinct behavior induced by calcineurin inhibitors. Cyclosporine (CsA) and other calcineurin inhibitors have garnered interest for their potential role in the prevention of AD. We generated behavioral profiles suitable for cluster analysis, through which we identified 64 candidate therapeutics for neurodegenerative disorders.
Collapse
Affiliation(s)
| | - Sayali V Gore
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, USA
| | - Jill A Kreiling
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, USA
| | - Robbert Creton
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, USA
| |
Collapse
|
4
|
Kuhn AJ, Chan K, Sajimon M, Yoo S, Balasco Serrão VH, Lee J, Abrams B, Nowick JS, Uversky VN, Wheeler C, Raskatov JA. Amyloid-α Peptide Formed through Alternative Processing of the Amyloid Precursor Protein Attenuates Alzheimer's Amyloid-β Toxicity via Cross-Chaperoning. J Am Chem Soc 2024; 146:2634-2645. [PMID: 38236059 DOI: 10.1021/jacs.3c11511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Amyloid aggregation is a key feature of Alzheimer's disease (AD) and a primary target for past and present therapeutic efforts. Recent research is making it increasingly clear that the heterogeneity of amyloid deposits, extending past the commonly targeted amyloid-β (Aβ), must be considered for successful therapy. We recently demonstrated that amyloid-α (Aα or p3), a C-terminal peptidic fragment of Aβ, aggregates rapidly to form amyloids and can expedite the aggregation of Aβ through seeding. Here, we advance the understanding of Aα biophysics and biology in several important ways. We report the first cryogenic electron microscopy (cryo-EM) structure of an Aα amyloid fibril, proving unambiguously that the peptide is fibrillogenic. We demonstrate that Aα induces Aβ to form amyloid aggregates that are less toxic than pure Aβ aggregates and use nuclear magnetic resonance spectroscopy (NMR) to provide insights into specific interactions between Aα and Aβ in solution. This is the first evidence that Aα can coassemble with Aβ and alter its biological effects at relatively low concentrations. Based on the above, we urge researchers in the field to re-examine the significance of Aα in AD.
Collapse
Affiliation(s)
- Ariel J Kuhn
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, California 95064, United States
| | - Ka Chan
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, California 95064, United States
| | - Maria Sajimon
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, California 95064, United States
| | - Stan Yoo
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Vitor Hugo Balasco Serrão
- Biomolecular Cryoelectron Microscopy Facility, University of California, Santa Cruz, Santa Cruz, California 95064, United States
| | - Jack Lee
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, California 95064, United States
| | - Benjamin Abrams
- Department of Biomolecular Engineering, Life Sciences Microscopy Center, University of California, Santa Cruz, Santa Cruz, California 95064, United States
| | - James S Nowick
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Vladimir N Uversky
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, 12901 Bruce B. Downs Boulevard, MDC07, Tampa, Florida 33612, United States
| | - Christopher Wheeler
- World Brain Mapping Foundation, Society for Brain Mapping & Therapeutics, 860 Via De La Paz, Suite E-1, Pacific Palisades, California 90272-3668, United States
- StemVax Therapeutics (Subsidiary of NovAccess Global), 8584 E. Washington Street #127, Chagrin Falls, Ohio 44023, United States
- StemVax Therapeutics (Subsidiary of NovAccess Global), 2265 E. Foothill Boulevard, Pasadena, California 91107, United States
- T-Neuro Pharma, 1451 Innovation Parkway SE, Suite 600, Albuquerque, New Mexico 87123, United States
- T-Neuro Pharma, P.O. Box 781, Aptos, California 95003, United States
| | - Jevgenij A Raskatov
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, California 95064, United States
| |
Collapse
|
5
|
Bayazid AB, Jeong YH, Jeong SA, Lim BO. Sodium butyrate alleviates potential Alzheimer’s disease in vitro by suppressing Aβ and tau activation and ameliorates Aβ-induced toxicity. FOOD AGR IMMUNOL 2023; 34. [DOI: 10.1080/09540105.2023.2234100] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 07/04/2023] [Indexed: 08/06/2024] Open
Affiliation(s)
- Al Borhan Bayazid
- Medicinal Biosciences, Department of Applied Biological Sciences, Graduate School, BK21 Program, Konkuk University, Chungju, Korea
| | - Yeong Hwan Jeong
- Medicinal Biosciences, Department of Applied Biological Sciences, Graduate School, BK21 Program, Konkuk University, Chungju, Korea
| | - Soo Ah Jeong
- Medicinal Biosciences, Department of Applied Biological Sciences, Graduate School, BK21 Program, Konkuk University, Chungju, Korea
- Human Bioscience Corporate R&D Center, Chungju, Korea
| | - Beong Ou Lim
- Medicinal Biosciences, Department of Applied Biological Sciences, Graduate School, BK21 Program, Konkuk University, Chungju, Korea
- Human Bioscience Corporate R&D Center, Chungju, Korea
| |
Collapse
|
6
|
Xie R, Chen F, Ma Y, Hu W, Zheng Q, Cao J, Wu Y. Network pharmacology‒based analysis of marine cyanobacteria derived bioactive compounds for application to Alzheimer's disease. Front Pharmacol 2023; 14:1249632. [PMID: 37927608 PMCID: PMC10620974 DOI: 10.3389/fphar.2023.1249632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 10/05/2023] [Indexed: 11/07/2023] Open
Abstract
In recent years, the Alzheimer's disease (AD) epidemic has become one of the largest global healthcare crises. Besides, the available systemic therapies for AD are still inadequate. Due to the insufficient therapeutic options, new treatment strategies are urgently needed to achieve a satisfactory therapeutic effect. Marine bio-resources have been accepted as one of the most economically viable and sustainable sources with potential applications for drug discovery and development. In this study, a marine cyanobacteria-Synechococcus sp. XM-24 was selected as the object of research, to systematically investigate its therapeutic potential mechanisms for AD. The major active compounds derived from the Synechococcus sp. biomass were identified via pyrolysis-gas chromatography-mass spectrometry (GC-MS), and 22 compounds were identified in this strain. The most abundant chemical compounds was (E)-octadec-11-enoic acid, with the peak area of 30.6%. Follow by tridecanoic acid, 12-methyl- and hexadecanoic acid, with a peak area of 23.26% and 18.23%, respectively. GC-MS analysis also identified indolizine, isoquinoline, 3,4-dihydro- and Phthalazine, 1-methyl-, as well as alkene and alkane from the strain. After the chemical toxicity test, 10 compounds were finally collected to do the further analysis. Then, network pharmacology and molecular docking were adopted to systematically study the potential anti-AD mechanism of these compounds. Based on the analysis, the 10 Synechococcus-derived active compounds could interact with 128 related anti-AD targets. Among them, epidermal growth factor receptor (EGFR), vascular endothelial growth factor A (VEGFA) and mitogen-activated protein kinase 3 (MAPK3) were the major targets. Furthermore, the compounds N-capric acid isopropyl ester, (E)-octadec-11-enoic acid, and 2H-Pyran-2,4(3H)-dione, dihydro-6-methyl- obtained higher degrees in the compounds-intersection targets network analysis, indicating these compounds may play more important role in the process of anti-AD. In addition, Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis showed that these active compounds exert the anti-AD effects mainly through PI3K-Akt signaling pathway, neuroactive ligand-receptor interaction and ras signaling pathway. Our study identified Synechococcus-derived bioactive compounds have the potential for application to AD by targeting multiple targets and related pathways, which will provide a foundation for future research on applications of marine cyanobacteria in the functional drug industry.
Collapse
Affiliation(s)
- Rui Xie
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education, Gannan Medical University, Ganzhou, China
| | - Feng Chen
- Department of Pediatric Surgery, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Yixuan Ma
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education, Gannan Medical University, Ganzhou, China
| | - Wen Hu
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education, Gannan Medical University, Ganzhou, China
| | - Qiang Zheng
- State Key Laboratory of Marine Environmental Science, Institute of Marine Microbes and Ecospheres, Xiamen University, Xiamen, China
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Jinguo Cao
- School of Basic Medical Sciences, Gannan Medical University, Ganzhou, China
| | - Yi Wu
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education, Gannan Medical University, Ganzhou, China
| |
Collapse
|
7
|
Zhang GH, Chin KL, Yan SY, Pare R. Antioxioxidant and antiapoptotic effects of Thymosin β4 in Aβ-induced SH-SY5Y cells via the 5-HTR1A/ERK axis. PLoS One 2023; 18:e0287817. [PMID: 37788276 PMCID: PMC10547165 DOI: 10.1371/journal.pone.0287817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 06/13/2023] [Indexed: 10/05/2023] Open
Abstract
Alzheimer's disease (AD) is a common amnestic cognitive impairment characterised by β-amyloid (Aβ) plaques deposit in the brain of the elderly. AD is a yet incurable disease due to its unknown exact pathogenesis and unavailability of effective remedies in clinical application. Thymosin β4 (Tβ4) is a housekeeping protein that plays important role in cell proliferation, migration and differentiation. It has the ability to protect and repair neurons however it is still unclear involvement in AD. Therefore, the aim of this study is to elucidate the role and mechanism of Tβ4 in mediating the improvement of AD. AD-like cell model was constructed in neuroblastoma cell line SH-SY5Y treated with Aβ. Overexpression of Tβ4 were done using lentivirus infection and downregulation through siRNA transfection. We performed western blot and flow cytometry to study the apoptosis and standard kits to measure the oxidative stress-associated biomarkers. There is significant increased in viability and decreased apoptosis in Tβ4 overexpression group compared to control. Furthermore, overexpression of Tβ4 suppressed the expression of pro-apoptotic markers such as Caspase-3, Caspase-8, and Bax meanwhile upregulated the expression of anti-apoptotic gene Bcl-2. Tβ4 alleviated oxidative damage by reducing MDA, LDH and ROS and increasing SOD and GSH-PX in Aβ-treated SH-SY5Y cells. We found that Tβ4 inhibit ERK/p38 MAPK pathway and intensify the expression of 5-HTR1A. Additionally, we showed that upregulation of 5-HTR1A dampened the Tβ4 to activate ERK signalling. In conclusion, our study revealed the neuroprotective role of Tβ4 in AD which may open up new therapeutic applications in AD treatment.
Collapse
Affiliation(s)
- Gui-Hong Zhang
- School of Medicine, Xi’an International University, Xi’an, Shaanxi, China
- Faculty of Medicine and Health Sciences, Department of Biomedical Science, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
| | - Kai Ling Chin
- Faculty of Medicine and Health Sciences, Department of Biomedical Science, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
| | - Shi-Yan Yan
- International Innovation Institute of Acupuncture and Moxibustion, Beijing University of Chinese Medicine, Beijing, Hebei, China
| | - Rahmawati Pare
- Faculty of Medicine and Health Sciences, Department of Biomedical Science, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
| |
Collapse
|
8
|
Hernández TDR, Gore SV, Kreiling JA, Creton R. Finding Drug Repurposing Candidates for Neurodegenerative Diseases using Zebrafish Behavioral Profiles. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.12.557235. [PMID: 37745452 PMCID: PMC10515830 DOI: 10.1101/2023.09.12.557235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Drug repurposing can accelerate drug development while reducing the cost and risk of toxicity typically associated with de novo drug design. Several disorders lacking pharmacological solutions and exhibiting poor results in clinical trials - such as Alzheimer's disease (AD) - could benefit from a cost-effective approach to finding new therapeutics. We previously developed a neural network model, Z-LaP Tracker, capable of quantifying behaviors in zebrafish larvae relevant to cognitive function, including activity, reactivity, swimming patterns, and optomotor response in the presence of visual and acoustic stimuli. Using this model, we performed a high-throughput screening of FDA-approved drugs to identify compounds that affect zebrafish larval behavior in a manner consistent with the distinct behavior induced by calcineurin inhibitors. Cyclosporine (CsA) and other calcineurin inhibitors have garnered interest for their potential role in the prevention of AD. We generated behavioral profiles suitable for cluster analysis, through which we identified 64 candidate therapeutics for neurodegenerative disorders.
Collapse
Affiliation(s)
- Thaís Del Rosario Hernández
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, Rhode Island, USA
| | - Sayali V Gore
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, Rhode Island, USA
| | - Jill A Kreiling
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, Rhode Island, USA
| | - Robbert Creton
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, Rhode Island, USA
| |
Collapse
|
9
|
Liu X, Ding XF, Wen B, Ma TF, Qin-Wang, Li ZJ, Zhang YS, Gao JZ, Chen ZZ. Genome-wide identification and skin expression of immunoglobulin superfamily in discus fish (Symphysodon aequifasciatus) reveal common genes associated with vertebrate lactation. Gene 2023; 862:147260. [PMID: 36775217 DOI: 10.1016/j.gene.2023.147260] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/12/2022] [Accepted: 02/03/2023] [Indexed: 02/12/2023]
Abstract
Discus Symphysodon spp. employs an unusual parental care behavior where fry feed on parental skin mucus after hatching. Studies on discus immunoglobulin superfamily (IgSF) especially during parental care are scarce. Here, a total of 518 IgSF members were identified based on discus genome and clustered into 12 groups, unevenly distributing on 30 linkage groups. A total of 92 pairs of tandem duplication and 40 pairs of segmental duplication that underwent purifying selection were identified. IgSF genes expressed differentially in discus skin during different care stages and between male and female parents. Specifically, the transcription of btn1a1, similar with mammalian lactation, increased after spawning, reached a peak when fry started biting on parents' skin mucus, and then decreased. The expression of btn2a1 and other immune members, e.g., nect4, fcl5 and cd22, were up-regulated when fry stopped biting on mucus. These results suggest the expression differentiation of IgSF genes in skin of discus fish during parental care.
Collapse
Affiliation(s)
- Xin Liu
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China
| | - Xiang-Fei Ding
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China
| | - Bin Wen
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China; National Demonstration Centre for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China.
| | - Teng-Fei Ma
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China
| | - Qin-Wang
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China
| | - Zhong-Jun Li
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China
| | - Yan-Shen Zhang
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China
| | - Jian-Zhong Gao
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China; National Demonstration Centre for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China
| | - Zai-Zhong Chen
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China; National Demonstration Centre for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China.
| |
Collapse
|
10
|
Dong Y, Lu J, Zhang S, Chen L, Wen J, Wang F, Mao Y, Li L, Zhang J, Liao S, Dong L. Design, synthesis and bioevaluation of 1,2,4-thiadiazolidine-3,5-dione derivatives as potential GSK-3β inhibitors for the treatment of Alzheimer's disease. Bioorg Chem 2023; 134:106446. [PMID: 36868127 DOI: 10.1016/j.bioorg.2023.106446] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/20/2023] [Accepted: 02/22/2023] [Indexed: 02/27/2023]
Abstract
Tideglusib is a non-competitive GSK-3β inhibitor which contain 1,2,4-thiadiazolidine-3,5-dione moiety, and now mainly used for progressive supranuclear palsy due to the lack of some primary cognitive endpoints and secondary endpoints in a phase IIb trail for Alzheimer's disease. Additionally, insufficient evidence exists to support that there are obvious covalent bonds between Tideglusib and GSK-3β. Targeted covalent inhibition strategy could improve the binding efficiency, selectivity and duration of kinase inhibitors. Based on the above premise, two series of targeted compounds with acryloyl warheads were designed and synthesized. The kinase inhibitory activity of the selected compound 10a with better neuroprotective effect improved 2.7 fold than that of Tideglusib. After the preliminary screening of GSK-3β inhibition and neuroprotective activity, the mechanism action of the selected compound 10a was investigated in vitro and in vivo. The results confirmed that 10a with excellent selectivity among the whole tested kinases could significantly reduce the expressions of APP and p-Tau via increasing the level of p-GSK-3β. The pharmacodynamic assay in vivo showed that 10a could markedly improve the learning and memory functions in AD mice induced by AlCl3 combined with d-galactose. At the same time, the damage of hippocampal neurons in AD mice was obviously reduced. Accordingly, the introduction of acryloyl warheads could increase the GSK-3β inhibitory activity of 1,2,4-thiadiazolidine-3,5-dione derivatives, and the selected compound 10a deserves further research as an effective GSK-3β inhibitor for the potential treatment of AD.
Collapse
Affiliation(s)
- Yongxi Dong
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, China.
| | - Jun Lu
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, China
| | - Shanhui Zhang
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, China
| | - Lina Chen
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, China
| | - Jinlan Wen
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, China
| | - Fang Wang
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, China
| | - Yongqing Mao
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, China
| | - Lei Li
- Guizhou provincial Center for Disease Control and Prevention, Guiyang 550004, China
| | - Jiquan Zhang
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, China
| | - Shanggao Liao
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, China.
| | - Li Dong
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, China.
| |
Collapse
|
11
|
Khezri MR, Ghasemnejad-Berenji M. The Role of Caspases in Alzheimer's Disease: Pathophysiology Implications and Pharmacologic Modulation. J Alzheimers Dis 2023; 91:71-90. [PMID: 36442198 DOI: 10.3233/jad-220873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disorder worldwide. Although the main cause of the onset and development of AD is not known yet, neuronal death due to pathologic changes such as amyloid-β (Aβ) deposition, tau aggregation, neuroinflammation, oxidative stress, and calcium dyshomeostasis are considered to be the main cause. At the present, there is no cure for this insidious disorder. However, accurate identification of molecular changes in AD can help provide new therapeutic goals. Caspases are a group of proteases which are known because of their role in cellular apoptosis. In addition, different caspases are involved in other cellular responses to the environment, such as induction of inflammation. Emerging evidence suggest that these proteases play a central role in AD pathophysiology due to their role in the processing of amyloid-β protein precursor, tau cleavage, and neuroinflammation. Therefore, it seems that targeting caspases may be a suitable therapeutic option to slow the progression of AD. This review focuses on the role of caspases in AD pathophysiology and introduce results from studies targeted caspases in different models of AD.
Collapse
Affiliation(s)
| | - Morteza Ghasemnejad-Berenji
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Urmia University of Medical Sciences, Urmia, Iran.,Research Center for Experimental and Applied Pharmaceutical Sciences, Urmia University of Medical Sciences, Urmia, Iran
| |
Collapse
|
12
|
Turgutalp B, Bhattarai P, Ercetin T, Luise C, Reis R, Gurdal EE, Isaak A, Biriken D, Dinter E, Sipahi H, Schepmann D, Junker A, Wünsch B, Sippl W, Gulcan HO, Kizil C, Yarim M. Discovery of Potent Cholinesterase Inhibition-Based Multi-Target-Directed Lead Compounds for Synaptoprotection in Alzheimer's Disease. J Med Chem 2022; 65:12292-12318. [PMID: 36084304 DOI: 10.1021/acs.jmedchem.2c01003] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Drug development efforts that focused on single targets failed to provide effective treatment for Alzheimer's disease (AD). Therefore, we designed cholinesterase inhibition (ChEI)-based multi-target-directed ligands (MTDLs) to simultaneously target AD-related receptors. We built a library of 70 compounds, sequentially screened for ChEI, and determined σ1R, σ2R, NMDAR-GluN2B binding affinities, and P2X7R antagonistic activities. Nine fulfilled in silico drug-likeness criteria and did not display toxicity in three cell lines. Seven displayed cytoprotective activity in two stress-induced cellular models. Compared to donepezil, six showed equal/better synaptic protection in a zebrafish model of acute amyloidosis-induced synaptic degeneration. Two P2X7R antagonists alleviated the activation state of microglia in vivo. Permeability studies were performed, and four did not inhibit CYP450 3A4, 2D6, and 2C9. Therefore, four ChEI-based lead MTDLs are promising drug candidates for synaptic integrity protection and could serve as disease-modifying AD treatment. Our study also proposes zebrafish as a useful preclinical tool for drug discovery and development.
Collapse
Affiliation(s)
- Bengisu Turgutalp
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Yeditepe University, 34755 Istanbul, Turkey.,German Centre for Neurodegenerative Diseases (DZNE), Helmholtz Association, 01307 Dresden, Germany
| | - Prabesh Bhattarai
- German Centre for Neurodegenerative Diseases (DZNE), Helmholtz Association, 01307 Dresden, Germany.,Department of Neurology, Columbia University Irving Medical Center, 10032 New York, United States
| | - Tugba Ercetin
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Eastern Mediterranean University, TRNC, via Mersin 10, 99628 Famagusta, Turkey
| | - Chiara Luise
- Department of Medicinal Chemistry, Institute of Pharmacy, Martin-Luther-Universität Halle-Wittenberg, 6099 Halle (Saale), Germany
| | - Rengin Reis
- Department of Toxicology, Faculty of Pharmacy, Yeditepe University, 34755 Istanbul, Turkey.,Department of Toxicology, Faculty of Pharmacy, Acibadem Mehmet Ali Aydinlar University, 34758 Istanbul, Turkey
| | - Enise Ece Gurdal
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Yeditepe University, 34755 Istanbul, Turkey.,Institute of Chemistry, Martin-Luther-Universität Halle-Wittenberg, 06120 Halle, Germany
| | - Andreas Isaak
- European Institute for Molecular Imaging (EIMI), der Westfälischen Wilhelms-Universität, D-48149 Münster, Germany
| | - Derya Biriken
- German Centre for Neurodegenerative Diseases (DZNE), Helmholtz Association, 01307 Dresden, Germany.,Department of Medical Microbiology, Ankara University Faculty of Medicine, 06620 Ankara, Turkey
| | - Elisabeth Dinter
- German Centre for Neurodegenerative Diseases (DZNE), Helmholtz Association, 01307 Dresden, Germany.,Department of Neurology, University Clinic, TU Dresden, 01307 Dresden, Germany
| | - Hande Sipahi
- Department of Toxicology, Faculty of Pharmacy, Yeditepe University, 34755 Istanbul, Turkey
| | - Dirk Schepmann
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, D-48149 Münster, Germany
| | - Anna Junker
- European Institute for Molecular Imaging (EIMI), der Westfälischen Wilhelms-Universität, D-48149 Münster, Germany
| | - Bernhard Wünsch
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, D-48149 Münster, Germany
| | - Wolfgang Sippl
- Department of Medicinal Chemistry, Institute of Pharmacy, Martin-Luther-Universität Halle-Wittenberg, 6099 Halle (Saale), Germany
| | - Hayrettin Ozan Gulcan
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Eastern Mediterranean University, TRNC, via Mersin 10, 99628 Famagusta, Turkey
| | - Caghan Kizil
- German Centre for Neurodegenerative Diseases (DZNE), Helmholtz Association, 01307 Dresden, Germany.,Department of Neurology, Columbia University Irving Medical Center, 10032 New York, United States
| | - Mine Yarim
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Yeditepe University, 34755 Istanbul, Turkey
| |
Collapse
|
13
|
Phosphodiesterase (PDE) III inhibitor, Cilostazol, improved memory impairment in aluminum chloride-treated rats: modulation of cAMP/CREB pathway. Inflammopharmacology 2022; 30:2477-2488. [PMID: 35727381 DOI: 10.1007/s10787-022-01010-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 05/12/2022] [Indexed: 11/05/2022]
Abstract
The most prevalent type of dementia is Alzheimer's disease (AD), which is currently incurable. Existing treatments for Alzheimer's disease, such as acetylcholinesterase inhibitors, are only effective for symptom relief. Disease-modifying medications for Alzheimer's disease are desperately required, given the enormous burdens that the disease places on individuals and communities. Phosphodiesterase (PDE) inhibitors are gaining a lot of attention in the research community because of their potential in treating age-related cognitive decline. Cilostazol is a selective PDE III inhibitor used as antiplatelet agent through cAMP response element-binding (CREB) protein phosphorylation pathway (cAMP/CREB). The neuroprotective effect of cilostazol in AD-like cognitive decline in rats was investigated in this study. After 2 months of intraperitoneal administration of 10 mg/kg aluminum chloride, Morris water maze and Y-maze (behavioral tests) were performed. After that, histological and biochemical examinations of the hippocampal region were carried out. Aluminum chloride-treated rats showed histological, biochemical, and behavioral changes similar to Alzheimer's disease. Cilostazol improved rats' behavioral and histological conditions, raised neprilysin level while reduced levels of amyloid-beta protein and phosphorylated tau protein. It also decreased the hippocampal levels of tumor necrosis factor-alpha, nuclear factor-kappa B, FAS ligand, acetylcholinesterase content, and malondialdehyde. These outcomes demonstrate the protective activity of cilostazol versus aluminum-induced memory impairment.
Collapse
|
14
|
Jaragh-Alhadad LA, Falahati M. Copper oxide nanoparticles promote amyloid-β-triggered neurotoxicity through formation of oligomeric species as a prelude to Alzheimer's diseases. Int J Biol Macromol 2022; 207:121-129. [PMID: 35259430 DOI: 10.1016/j.ijbiomac.2022.03.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/12/2022] [Accepted: 03/02/2022] [Indexed: 12/28/2022]
Abstract
Protein oligomerization is involved in the progression of Alzheimer's disease (AD). In general, a particle that can accelerate protein oligomerization should be considered a toxic material. Several studies reported the progress of nanoparticles (NPs) such as copper oxide (CuO) in biomedical platforms, however, they may have the ability to promote the protein oligomerization process. Here, we aimed to study the effect of CuO NPs on amyloid β1-42 (Aβ1-42) oligomerization and relevant neurotoxicity. CuO NPs were synthesized by precipitation technique and characterized by several methods such as ThT, Congo red, CD spectroscopic methods, and TEM imaging. The outcomes indicated that the fabricated CuO NPs with a size of around 50 nm led to a remarkable acceleration in Aβ1-42 oligomerization in a concentration-dependent manner through shortening the nucleation step and promoting the fibrillization rate. Moreover, cellular assays revealed that Aβ1-42 oligomers aged with CuO NPs were more toxic than Aβ1-42 oligomers untreated against SH-SY5Y cells in triggering cell mortality, membrane leakage, oxidative stress, and apoptosis. In conclusion, this study provides important information about the adverse effects of CuO NPs against proteins in the central nervous system to promote the formation of cytotoxic oligomers.
Collapse
Affiliation(s)
- Laila Abdulmohsen Jaragh-Alhadad
- Department of Chemistry, College of Science, Kuwait University, Safat 13060, Kuwait; Cardiovascular and Metabolic Sciences Department, Learner Research Institute, Cleveland Clinic, OH 44195, USA.
| | - Mojtaba Falahati
- Laboratory Experimental Oncology, Department of Pathology, Erasmus MC, 3015GD Rotterdam, the Netherlands; Department of Nanotechnology, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| |
Collapse
|
15
|
Gomaa AA, Farghaly HS, Ahmed AM, El-Mokhtar MA, Hemida FK. Advancing combination treatment with cilostazol and caffeine for Alzheimer's disease in high fat-high fructose-STZ induced model of amnesia. Eur J Pharmacol 2022; 921:174873. [DOI: 10.1016/j.ejphar.2022.174873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 02/22/2022] [Accepted: 03/07/2022] [Indexed: 11/25/2022]
|
16
|
Abstract
Oxidative stress is important for the etiology and pathogenesis of Alzheimer's disease (AD). Research tools that can conveniently evaluate oxidative stress in AD models are expected to catalyze and accelerate research on AD. This study explored the use of genetically encoded fluorescent indicators (GEFIs) to detect mitochondrial oxidative stress in organotypic brain slices and AD mouse models. To enable ratiometric normalization and avoid tissue autofluorescence, we genetically fused a green fluorescent hydrogen peroxide (H2O2) indicator, HyPer7, with each of two selected, bright red fluorescent proteins (RFPs), mScarlet-I and tdTomato. The resultant indicators, namely, HyPerGRS and HyPerGRT, were tagged with mitochondrial targeting sequences and examined for localization and function in cultured HeLa cells and primary mouse neurons. We further utilized HyPerGRT, which is a genetic fusion of HyPer7 with tdTomato, to monitor mitochondrial H2O2 in response to the human β-amyloid 1-42 isoform (Aβ42) in cultured brain slices and an AD mouse model. Owing to the high sensitivity and low autofluorescence interference resulting from HyPerGRT, we successfully detected Aβ42-mediated mitochondrial H2O2 in these AD models. The results suggest that HyPerGRT is a valuable tool for studying mitochondrial oxidative stress in tissues and animals.
Collapse
Affiliation(s)
- Xinyu Li
- Department of Molecular Physiology and Biological Physics, School of Medicine, University of Virginia, Charlottesville, VA, 22908, USA
- Center for Membrane and Cell Physiology, School of Medicine, University of Virginia, Charlottesville, VA, 22908, USA
| | - Yiyu Zhang
- Department of Molecular Physiology and Biological Physics, School of Medicine, University of Virginia, Charlottesville, VA, 22908, USA
- Center for Membrane and Cell Physiology, School of Medicine, University of Virginia, Charlottesville, VA, 22908, USA
| | - Hui-wang Ai
- Department of Molecular Physiology and Biological Physics, School of Medicine, University of Virginia, Charlottesville, VA, 22908, USA
- Center for Membrane and Cell Physiology, School of Medicine, University of Virginia, Charlottesville, VA, 22908, USA
- The UVA Cancer Center, University of Virginia, Charlottesville, VA, 22908, USA
- Corresponding Author.
| |
Collapse
|
17
|
Zhang GH, Pare RB, Chin KL, Qian YH. Tβ4 ameliorates oxidative damage and apoptosis through ERK/MAPK and 5-HT1A signaling pathway in Aβ insulted SH-SY5Y cells. Life Sci 2021:120178. [PMID: 34838849 DOI: 10.1016/j.lfs.2021.120178] [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: 03/23/2021] [Revised: 11/18/2021] [Accepted: 11/20/2021] [Indexed: 11/26/2022]
Abstract
AIMS Alzheimer's disease (AD) is the most common progressive neurodegenerative disorder seriously endangering the physical and mental health of the elderly, while no effective treatments and drugs in clinical practice are available. Thymosin β4 (Tβ4) is a multifunctional polypeptide involved in many physiological and pathological processes including AD. This study aims to understand the function and molecular mechanism of Tβ4 in the development of AD. MAIN METHODS Neuroblastoma cell line SH-SY5Y was treated with β-amyloid (Aβ) to induce AD-like pathological changes, which serves as Alzheimer's disease model. Tβ4 was overexpressed in SH-SY5Y cells by lentivirus infection, and downregulated by siRNA transfection. Apoptosis of transfected SH-SY5Y cells after Aβ-treatment was examined by western blot and flow cytometry. Apoptotic proteins and Tβ4-related signaling pathways were also investigated by western blot. KEY FINDINGS We found that Tβ4 overexpression increased viability and suppressed apoptosis of Aβ-treated SH-SY5Y cells. Tβ4 ameliorated oxidative damage and suppressed reactive oxygen species production in Aβ-treated SH-SY5Y cells. Consistently, Tβ4 overexpression down-regulated the expression levels of pro-apoptotic markers such as Caspase-3, Caspase-8, and Bax, while up-regulated the expression level of anti-apoptotic gene Bcl-2 in Aβ-stimulated SH-SY5Y cells. Mechanistically, we demonstrated that Tβ4 dampened ERK/p38 MAPK signaling and enhanced 5-HTR1A expression in Aβ-treated SH-SY5Y cells. Moreover, we revealed that Tβ4 inhibited the activation of ERK pathway through up-regulating 5-HTR1A in Aβ-treated SH-SY5Y cells. SIGNIFICANCE Taken together, our findings provide evidences to support the neuroprotective role of Tβ4 and might open up new therapeutic applications of Tβ4 in AD treatment.
Collapse
Affiliation(s)
- Gui-Hong Zhang
- School of Medicine, Xi'an International University, Xi'an 710077, Shaanxi, China; Department of Biomedical Science and Therapeutic, Faculty of Medicine and Health Sciences (FPSK), Universiti Malaysia Sabah (UMS), 88400 Kota Kinabalu, Sabah, Malaysia
| | - Rahmawati Binti Pare
- Department of Biomedical Science and Therapeutic, Faculty of Medicine and Health Sciences (FPSK), Universiti Malaysia Sabah (UMS), 88400 Kota Kinabalu, Sabah, Malaysia
| | - Kai Ling Chin
- Department of Biomedical Science and Therapeutic, Faculty of Medicine and Health Sciences (FPSK), Universiti Malaysia Sabah (UMS), 88400 Kota Kinabalu, Sabah, Malaysia
| | - Yi-Hua Qian
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center.
| |
Collapse
|
18
|
Cilostazol induces angiogenesis and regulates oxidative stress in a dose-dependent manner: A chorioallantoic membrane study. TURKISH JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY 2021; 29:449-456. [PMID: 35096441 PMCID: PMC8762914 DOI: 10.5606/tgkdc.dergisi.2021.22212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 08/25/2021] [Indexed: 11/21/2022]
Abstract
Background
In this study, we aimed to investigate the effects of cilostazol on angiogenesis and oxidative stress using the chorioallantoic membrane model.
Methods
In this experimental study, the Ross 308 chick embryos were used. The negative control group (n=10) received no intervention. The positive control group (n=10) consisted of eggs treated with epidermal growth factor for inducing angiogenesis. Three cilostazol groups were designed with 10-7 (n=10), 10-6 (n=10), and 10-5 (n=10) M concentrations. Each egg was punctured on the sixth day of incubation, and drug pellets were introduced to the positive control and drug groups at the prespecified doses. Vascular development was evaluated on the eighth day of application. The total oxidant status, total antioxidant capacity, and oxidative stress index levels were determined from albumen liquids obtained with a syringe before and after drug application.
Results
Lower oxidative stress index levels were obtained from the positive control and cilostazol groups compared to the negative control albumens (p=0.001). The increments in vascular junctions and newly developed vascular nodules were evaluated in drug-free and drug-applied chorioallantoic membranes. The highest activity was obtained in the 10-7 M concentration cilostazol group. An increased angiogenic activity was detected in all drug groups in each concentration compared to the negative control group (p=0.001). Angiogenic activity was similar in all the cilostazol-treated groups (p=0.43).
Conclusion
Cilostazol has a positive stimulant effect on angiogenesis and it seems to suppress oxidative stress during embryonic growth. Cilostazol exerts these effects significantly and similarly at different doses.
Collapse
|
19
|
Jumnongprakhon P, Chokchaisiri R, Thummayot S, Suksamrarn A, Tocharus C, Tocharus J. 5,6,7,4'-Tetramethoxyflavanone attenuates NADPH oxidase 1/4 and promotes sirtuin-1 to inhibit cell stress, senescence and apoptosis in Aß25-35-mediated SK-N-SH dysfunction. EXCLI JOURNAL 2021; 20:1346-1362. [PMID: 34602929 PMCID: PMC8481796 DOI: 10.17179/excli2021-3841] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 08/18/2021] [Indexed: 11/23/2022]
Abstract
Amyloidogenesis is a fundamental step of amyloid beta (Aβ) generation-induced toxicity that is commonly reported to disrupt neuronal circuits, function and survival in Alzheimer's disease (AD). The neuroprotective effect of 5,6,7,4'-tetramethoxyflavanone (TMF) from Chormolaela odorata extract on brain degeneration and amyloidogenesis has previously been demonstrated. However, the mechanistic evidence for TMF's effects is still unclear. In this study, we evaluated the neuroprotective effect of TMF in Aβ25-35-induced toxicity in SK-N-SH neuroblastoma cells. Herein, we demonstrated that TMF exhibited potent antioxidant activity and significantly increased cell viability and decreased ROS production in a dose-dependent manner. Moreover, TMF reversed the effect of Aβ25-35, which caused energy deprivation and apoptosis, by decreasing the ratio of Bax/Bcl-xL and reducing mitochondrial membrane potential (Δψm), caspase-3 expression, apoptotic cells, and attenuating glucose transporter (Glut-3) expression. In addition, TMF protected against Aβ25-35-induced cellular senescence by attenuating β-galactosidase, p-21 and p-53 expression and promoted the expression of Sirt-1 and p-Rb. In addition, the effects of TMF on Aβ25-35 toxicity were related to the upregulation of phase II antioxidant and nuclear factor erythroid 2-related factor-2 (Nrf2) signaling, including superoxide dismutase (SOD), heme oxygenase (HO)-1, and nuclear translocation of Nrf2. Finally, we also found that TMF attenuated Aβ25-35-reduced synaptic plasticity by increasing the expression of synaptophysin and PSD-95, which was correlated with a decrease in acetylcholine esterase (AChE). Importantly, we found that the protective effects of TMF on Aβ25-35 were bidirectional, including marked inhibition of NADPH oxidase (NOX)-4 activity and partial activation of Sirt-1, which occurred prior to a reduction in the negative responses. Therefore, TMF may be useful for treating Aβ toxicity in AD.
Collapse
Affiliation(s)
- Pichaya Jumnongprakhon
- Department of Anatomy, Faculty of Medical Science, Naresuan University, Phitsanulok, 65000, Thailand
| | | | - Sarinthorn Thummayot
- Division of Anatomy, School of Medical Sciences, University of Phayao, Phayao, 56000, Thailand
| | - Apichart Suksamrarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand
| | - Chainarong Tocharus
- Department of Anatomy, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Jiraporn Tocharus
- Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; Center for Research and Development of Natural Products for Health, Chiang Mai University, Chiang Mai, 50200, Thailand
| |
Collapse
|
20
|
Tao W, Yu L, Shu S, Liu Y, Zhuang Z, Xu S, Bao X, Gu Y, Cai F, Song W, Xu Y, Zhu X. miR-204-3p/Nox4 Mediates Memory Deficits in a Mouse Model of Alzheimer's Disease. Mol Ther 2021; 29:396-408. [PMID: 32950103 PMCID: PMC7791017 DOI: 10.1016/j.ymthe.2020.09.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 07/25/2020] [Accepted: 09/01/2020] [Indexed: 12/17/2022] Open
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disorder leading to dementia in the elderly, and the mechanisms of AD are not fully defined. MicroRNAs (miRNAs) have been shown to contribute to memory deficits in AD. In this study, we identified that miR-204-3p was downregulated in the hippocampus and plasma of 6-month-old APPswe/PS1dE9 (APP/PS1) mice. miR-204-3p overexpression attenuated memory and synaptic deficits in APP/PS1 mice. The amyloid levels and oxidative stress were decreased in the hippocampus of APP/PS1 mice after miR-204-3p overexpression. Nicotinamide adenine dinucleotide phosphate (NADPH) oxidase 4 (Nox4) was a target of miR-204-3p, and Nox4 inhibition by GLX351322 protected neuronal cells against Aβ1-42-induced neurotoxicity. Furthermore, GLX351322 treatment rescued synaptic and memory deficits, and decreased oxidative stress and amyloid levels in the hippocampus of APP/PS1 mice. These results revealed that miR-204-3p attenuated memory deficits and oxidative stress in APP/PS1 mice by targeting Nox4, and miR-204-3p overexpression and/or Nox4 inhibition might be a potential therapeutic strategy for AD treatment.
Collapse
Affiliation(s)
- Wenyuan Tao
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu 210008, PR China; Institute of Brain Sciences, Nanjing University, Nanjing, Jiangsu 210093, PR China; Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu 210008, PR China; Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, Jiangsu 210008, PR China; Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, Jiangsu 210008, PR China
| | - Linjie Yu
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu 210008, PR China; Institute of Brain Sciences, Nanjing University, Nanjing, Jiangsu 210093, PR China; Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu 210008, PR China; Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, Jiangsu 210008, PR China; Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, Jiangsu 210008, PR China
| | - Shu Shu
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu 210008, PR China; Institute of Brain Sciences, Nanjing University, Nanjing, Jiangsu 210093, PR China; Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu 210008, PR China; Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, Jiangsu 210008, PR China; Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, Jiangsu 210008, PR China
| | - Ying Liu
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu 210008, PR China; Institute of Brain Sciences, Nanjing University, Nanjing, Jiangsu 210093, PR China; Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu 210008, PR China; Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, Jiangsu 210008, PR China; Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, Jiangsu 210008, PR China
| | - Zi Zhuang
- Department of Neurology, Drum Tower Hospital of Nanjing Medical University, Nanjing, Jiangsu 211166, PR China
| | - Siyi Xu
- Department of Neurology, Drum Tower Hospital of Nanjing Medical University, Nanjing, Jiangsu 211166, PR China
| | - Xinyu Bao
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu 210008, PR China; Institute of Brain Sciences, Nanjing University, Nanjing, Jiangsu 210093, PR China; Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu 210008, PR China; Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, Jiangsu 210008, PR China; Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, Jiangsu 210008, PR China
| | - Yue Gu
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu 210008, PR China; Institute of Brain Sciences, Nanjing University, Nanjing, Jiangsu 210093, PR China; Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu 210008, PR China; Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, Jiangsu 210008, PR China; Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, Jiangsu 210008, PR China
| | - Fang Cai
- Townsend Family Laboratories, Department of Psychiatry, The University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Weihong Song
- Townsend Family Laboratories, Department of Psychiatry, The University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Yun Xu
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu 210008, PR China; Institute of Brain Sciences, Nanjing University, Nanjing, Jiangsu 210093, PR China; Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu 210008, PR China; Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, Jiangsu 210008, PR China; Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, Jiangsu 210008, PR China; Department of Neurology, Drum Tower Hospital of Nanjing Medical University, Nanjing, Jiangsu 211166, PR China.
| | - Xiaolei Zhu
- Department of Neurology, Drum Tower Hospital, Medical School and The State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu 210008, PR China; Institute of Brain Sciences, Nanjing University, Nanjing, Jiangsu 210093, PR China; Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu 210008, PR China; Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, Jiangsu 210008, PR China; Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, Jiangsu 210008, PR China; Department of Neurology, Drum Tower Hospital of Nanjing Medical University, Nanjing, Jiangsu 211166, PR China.
| |
Collapse
|
21
|
Chan EWL, Yeo ETY, Wong KWL, See ML, Wong KY, Yap JKY, Gan SY. Piper sarmentosum Roxb. Attenuates Beta Amyloid (Aβ)-Induced Neurotoxicity Via the Inhibition of Amyloidogenesis and Tau Hyperphosphorylation in SH-SY5Y Cells. Curr Alzheimer Res 2021; 18:80-87. [PMID: 33761853 DOI: 10.2174/1567205018666210324124239] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 01/29/2021] [Accepted: 03/15/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND In Alzheimer's disease, accumulation of beta amyloid (Aβ) triggers amyloidogenesis and hyperphosphorylation of tau protein leading to neuronal cell death. Piper sarmentosum Roxb. (PS) is a traditional medicinal herb used by Malay to treat rheumatism, headache and boost memory. It possesses various biological effects, such as anti-cholinergic, anti-inflammatory, anti-oxidant and anti-depressant-like effects. OBJECTIVE The present study aimed to investigate neuroprotective properties of PS against Aβ-induced neurotoxicity and to evaluate its potential mechanism of action. METHODS Neuroprotective effects of hexane (HXN), dichloromethane (DCM), ethyl acetate (EA) and methanol (MEOH) extracts from leaves (L) and roots (R) of PS against Aβ-induced neurotoxicity were investigated in SH-SY5Y human neuroblastoma cells. Cells were pre-treated with PS for 24 h followed by 24 h of induction with Aβ. The neuroprotective effects of PS were studied using cell viability and cellular reactive oxygen species (ROS) assays. The levels of extracellular Aβ and tau proteins phosphorylated at threonine 231 (pT231) were determined. Gene and protein expressions were assessed using qRT-PCR analyses and western blot analyses, respectively. RESULTS Hexane extracts of PS (LHXN and RHXN) protected SH-SY5Y cells against Aβ-induced neurotoxicity, and decreased levels of extracellular Aβ and phosphorylated tau (pT231). Although extracts of PS inhibited Aβ-induced ROS production, it was unlikely that neuroprotective effects were simply due to the anti-oxidant capacity of PS. Further, mechanistic study suggested that the neuroprotective effects of PS might be due to its capability to regulate amyloidogenesis through the downregulation of BACE and APP. CONCLUSION These findings suggest that hexane extracts of PS confer neuroprotection against Aβ- induced neurotoxicity in SH-SY5Y cells by attenuating amyloidogenesis and tau hyperphosphorylation. Due to its neuroprotective properties, PS might be a potential therapeutic agent for Alzheimer's disease.
Collapse
Affiliation(s)
- Elaine W L Chan
- Institute for Research, Development and Innovation, International Medical University, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Kuala Lumpur,Malaysia
| | - Emilia T Y Yeo
- School of Pharmacy, International Medical University, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Kuala Lumpur,Malaysia
| | - Kelly W L Wong
- School of Pharmacy, International Medical University, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Kuala Lumpur,Malaysia
| | - Mun L See
- School of Pharmacy, International Medical University, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Kuala Lumpur,Malaysia
| | - Ka Y Wong
- School of Pharmacy, International Medical University, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Kuala Lumpur,Malaysia
| | - Jeremy K Y Yap
- School of Postgraduate Studies, International Medical University, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Kuala Lumpur,Malaysia
| | - Sook Y Gan
- School of Pharmacy, International Medical University, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Kuala Lumpur,Malaysia
| |
Collapse
|
22
|
Lu S, Wei X, Zhang H, Chen Z, Li J, Xu X, Xie Q, Chen L, Ye F, Phama HTT, Jiang L, Huang T, Wei J, Huang R. Protective effect of 2-dodecyl-6-methoxycyclohexa-2, 5-diene-1, 4-dione, isolated from Averrhoa carambola L., against Aβ1-42-induced apoptosis in SH-SY5Y cells by reversing Bcl-2/Bax ratio. Psychopharmacology (Berl) 2021; 238:193-200. [PMID: 33030593 DOI: 10.1007/s00213-020-05668-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 09/21/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND PURPOSE Aβ1-42-induced neurotoxicity has been considered as a possible mechanism to aggravate the onset and progression of Alzheimer's disease (AD). In this study, we aim to determine the protective effect of DMDD on the apoptosis of SH-SY5Y cells induced by Aβ1-42 and elucidate potential mechanism of DMDD's protective function in apoptosis. EXPERIMENTAL APPROACH CCK-8, AnnexinV-FITC/PI flow cytometry, and transmission electron microscopy analysis were used to determine the protection of DMDD on Aβ1-42-evoked apoptosis of SH-SY5Y cells. Cytochrome c release, JC-1 staining, and measuring the protein of Bcl-2 family by Western blot were applied to elucidate the mechanism of DMDD's protective function in apoptosis. KEY RESULTS Three concentration of DMDD (5 μmol/L, 10 μmol/L, and 20 μmol/L) rescues the cell viability loss and apoptosis of SH-SY5Y cells cultivated in Aβ1-42. The expressions of cleaved Caspase-3, -8, -9, the cytochrome c release, and mitochondrial membrane potential loss were inhibited by DMDD in Aβ1-42-insulted SH-SY5Y cells. The Western blot analysis showed that DMDD pretreatment clearly downregulated the protein of Bax and upregulated Bcl-2. Moreover, the Bcl-2/Bax ratio was obviously decreased in cells only exposed to Aβ1-42, but, which was suppressed by treated with DMDD. CONCLUSION AND IMPLICATIONS DMDD attenuated the apoptosis of SH-SY5Y cells induced by Aβ1-42 through reversing the Bcl-2/Bax ratio.
Collapse
Affiliation(s)
- Shunyu Lu
- Department of Pharmacy, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China.,Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Xiaojie Wei
- Department of Physiology, Faculty of Basic Medicine, Guangxi University of Chinese Medicine, Nanning, 530000, People's Republic of China
| | - Hongliang Zhang
- Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Zhenfeng Chen
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, Guilin, 541004, People's Republic of China
| | - Juman Li
- Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Xiaohui Xu
- Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Qiuqiao Xie
- Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Lixiu Chen
- Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Fangxing Ye
- Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Hoa Thi Thai Phama
- Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Luhui Jiang
- Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Tianmin Huang
- Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Jinbin Wei
- Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China.
| | - Renbin Huang
- Department of Pharmacology, Guangxi Medical University, Nanning, 530021, People's Republic of China.
| |
Collapse
|
23
|
Zhenxia Z, Min L, Peikui Y, Zikai C, Yaqun L, Junli W, Fenlian Y, Yuzhong Z. Inhibition of tau aggregation and associated cytotoxicity on neuron-like cells by calycosin. Int J Biol Macromol 2020; 171:74-81. [PMID: 33301850 DOI: 10.1016/j.ijbiomac.2020.12.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 11/15/2020] [Accepted: 12/04/2020] [Indexed: 12/18/2022]
Abstract
In this study, the in vitro assembly of tau and anti-amyloidogenic properties of one naturally occurring phytoestrogen, calycosin, was investigated by spectroscopic techniques including ThT and ANS fluorescence, CD, Congo red absorbance as well as TEM analysis. Afterwards the cytotoxicity of different amyloid species against SH-SY5Y cells was evaluated by MTT assay. Fluorescence spectroscopic studies revealed that calycosin exerts its anti-amyloidogenic effects through increasing the lag time and reducing the apparent growth rate constant (kapp), the amount of fibrillation, and the exposure of hydrophobic regions. Congo red absorbance and CD studies indicated that calycosin prevented the formation of tau aggregate species and β-sheets structures, respectively. TEM analysis also determined the capacity of calycosin to inhibit tau fibrillogenesis through formation of large amorphous aggregates. Furthermore, cellular assays disclosed that calycosin mitigated the cell mortality, LDH release, ROS level, and expression of Bax, Bcl-2, and Caspase-3 in both mRNA and protein levels induced by tau amyloid fibrils. In conclusion, this data may suggest that calycosin can prevent tau amyloid fibrillation and the associated cytotoxicity, mainly due to its effects on formation of lower content of oligomeric and fibrillar aggregates with lower solvent-exposed hydrophobic patches compared to those produced in the absence of calycosin.
Collapse
Affiliation(s)
- Zhang Zhenxia
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou 521041, Guangdong, China
| | - Lin Min
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou 521041, Guangdong, China
| | - Yang Peikui
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou 521041, Guangdong, China
| | - Chen Zikai
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou 521041, Guangdong, China
| | - Liu Yaqun
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou 521041, Guangdong, China
| | - Wang Junli
- Center of Reproductive Medicine, Affiliated Hospital of Youjiang Medical University For Nationalities, Baise 533000, Guangxi, China
| | - Yang Fenlian
- School of Pharmacy, Youjiang Medical University for Nationalities, Baise 533000, Guangxi, China.
| | - Zheng Yuzhong
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou 521041, Guangdong, China.
| |
Collapse
|
24
|
Greene AN, Parks LG, Solomon MB, Privette Vinnedge LM. Loss of DEK Expression Induces Alzheimer's Disease Phenotypes in Differentiated SH-SY5Y Cells. Front Mol Neurosci 2020; 13:594319. [PMID: 33304240 PMCID: PMC7701170 DOI: 10.3389/fnmol.2020.594319] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 10/20/2020] [Indexed: 11/13/2022] Open
Abstract
Alzheimer’s disease (AD) is the most common cause of dementia and is characterized by the buildup of β-amyloid plaques and neurofibrillary Tau tangles. This leads to decreased synaptic efficacy, cell death, and, consequently, brain atrophy in patients. Behaviorally, this manifests as memory loss and confusion. Using a gene ontology analysis, we recently identified AD and other age-related dementias as candidate diseases associated with the loss of DEK expression. DEK is a nuclear phosphoprotein with roles in DNA repair, cellular proliferation, and inhibiting apoptosis. Work from our laboratory determined that DEK is highly expressed in the brain, particularly in regions relevant to learning and memory, including the hippocampus. Moreover, we have also determined that DEK is highly expressed in neurons. Consistent with our gene ontology analysis, we recently reported that cortical DEK protein levels are inversely proportional to dementia severity scores in elderly female patients. However, the functional role of DEK in neurons is unknown. Thus, we knocked down DEK in an in vitro neuronal model, differentiated SH-SY5Y cells, hypothesizing that DEK loss would result in cellular and molecular phenotypes consistent with AD. We found that DEK loss resulted in increased neuronal death by apoptosis (i.e., cleaved caspases 3 and 8), decreased β-catenin levels, disrupted neurite development, higher levels of total and phosphorylated Tau at Ser262, and protein aggregates. We have demonstrated that DEK loss in vitro recapitulates cellular and molecular phenotypes of AD pathology.
Collapse
Affiliation(s)
- Allie N Greene
- Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Lois G Parks
- Division of Oncology, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Matia B Solomon
- Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH, United States.,Department of Psychology, University of Cincinnati, Cincinnati, OH, United States
| | - Lisa M Privette Vinnedge
- Division of Oncology, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| |
Collapse
|
25
|
Attenuation of Oxidative Stress by Cannabinoids and Cannabis Extracts in Differentiated Neuronal Cells. Pharmaceuticals (Basel) 2020; 13:ph13110328. [PMID: 33105840 PMCID: PMC7690570 DOI: 10.3390/ph13110328] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 09/29/2020] [Accepted: 10/10/2020] [Indexed: 12/16/2022] Open
Abstract
In this proof-of-concept study, the antioxidant activity of phytocannabinoids, namely cannabidiol (CBD) and Δ9- tetrahydrocannabinol (THC), were investigated using an in vitro system of differentiated human neuronal SY-SH5Y cells. The oxidative stress was induced by hydrogen peroxide, as reactive oxygen species (ROS). Alzheimer's disease (AD)-like pathological conditions were mimicked in vitro by treating the differentiated neuronal cells with amyloid-β1-42 (Aβ1-42) in the presence of Cu(II). We showed that THC had a high potency to combat oxidative stress in both in vitro models, while CBD did not show a remarkable antioxidant activity. The cannabis extracts also exhibited a significant antioxidant activity, which depended on the ratio of the THC and CBD. However, our results did not suggest any antagonist effect of the CBD on the antioxidant activity of THC. The effect of cannabis extracts on the cell viability of differentiated human neuronal SY-SH5Y cells was also investigated, which emphasized the differences between the bioactivity of cannabis extracts due to their composition. Our preliminary results demonstrated that cannabis extracts and phytocannabinoids have a promising potential as antioxidants, which can be further investigated to develop novel pharmaceuticals targeting oxidative stress therapy.
Collapse
|
26
|
Melatonin Promotes Neuroprotection of H2O2-induced Neural Stem Cells via lncRNA MEG3/miRNA-27a-3p/MAP2K4 axis. Neuroscience 2020; 446:69-79. [DOI: 10.1016/j.neuroscience.2020.06.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 05/12/2020] [Accepted: 06/18/2020] [Indexed: 11/20/2022]
|
27
|
Hou L, Zhang L, Hong JS, Zhang D, Zhao J, Wang Q. Nicotinamide Adenine Dinucleotide Phosphate Oxidase and Neurodegenerative Diseases: Mechanisms and Therapy. Antioxid Redox Signal 2020; 33:374-393. [PMID: 31968994 DOI: 10.1089/ars.2019.8014] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Significance: The growing incidence of neurodegenerative diseases significantly impacts the individuals who suffer from these disorders and is a major health concern globally. Although the specific mechanisms of neurodegenerative diseases are still far from being acknowledged, it is becoming clear that oxidative stress and neuroinflammation are critical contributing factors to the progression of neurodegeneration. Thus, it is conceivable that the inhibition of oxidative stress and neuroinflammation may represent promising therapeutic targets for the treatment of neurodegenerative diseases. Recent Advances: Recently, the strategy for neurodegenerative disease therapy has shifted from the use of antioxidants and conventional anti-inflammatory targets to upstream mediators due to the failure of most antioxidants and nonsteroidal anti-inflammatory drugs in clinical trials. Nicotinamide adenine dinucleotide phosphate oxidases (NOXs), a family of superoxide-producing enzyme complexes, have been identified as an upstream factor that controls both oxidative stress and neuroinflammation. Genetic inactivation or pharmacological inhibition of NOX enzymes displays potent neuroprotective effects in a broad spectrum of neurodegenerative disease models. Critical Issues: The detailed mechanisms of how NOX enzymes regulate oxidative stress and neuroinflammation still remain unclear. Moreover, the currently available inhibitors of NOX enzymes exhibit nonspecificity, off-target effects, unsuitable pharmacokinetic properties, and even high toxicity, markedly limiting their potential clinical applications. Future Directions: This review provides novel insights into the roles of NOXs in neurodegenerative pharmacology, and indicates the types of NOX enzyme inhibitors that should be identified and developed as candidates for future applications, which might reveal novel neurodegenerative disease therapies based on NOXs.
Collapse
Affiliation(s)
- Liyan Hou
- Institute of Toxicology, School of Public Health, Dalian Medical University, Dalian, China.,National-Local Joint Engineering Research Center for Drug-Research and Development (R&D) of Neurodegenerative Diseases, Dalian Medical University, Dalian, China
| | - Lin Zhang
- Academy of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Jau-Shyong Hong
- Neuropharmacology Section, Neurobiology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina
| | - Dan Zhang
- State Key Laboratory of Natural Products and Functions, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jie Zhao
- National-Local Joint Engineering Research Center for Drug-Research and Development (R&D) of Neurodegenerative Diseases, Dalian Medical University, Dalian, China
| | - Qingshan Wang
- Institute of Toxicology, School of Public Health, Dalian Medical University, Dalian, China.,National-Local Joint Engineering Research Center for Drug-Research and Development (R&D) of Neurodegenerative Diseases, Dalian Medical University, Dalian, China
| |
Collapse
|
28
|
Anti-aging Klotho Protects SH-SY5Y Cells Against Amyloid β1-42 Neurotoxicity: Involvement of Wnt1/pCREB/Nrf2/HO-1 Signaling. J Mol Neurosci 2020; 71:19-27. [PMID: 32627121 DOI: 10.1007/s12031-020-01621-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 06/08/2020] [Indexed: 12/11/2022]
Abstract
Alzheimer's disease (AD) is considered a prevalent neurological disorder with a neurodegenerative nature in elderly people. Oxidative stress and neuroinflammation due to amyloid β (Aβ) peptides are strongly involved in AD pathogenesis. Klotho is an anti-aging protein with multiple protective effects that its deficiency is involved in development of age-related disorders. In this study, we investigated the beneficial effect of Klotho pretreatment at different concentrations of 0.5, 1, and 2 nM against Aβ1-42 toxicity at a concentration of 20 μM in human SH-SY5Y neuroblastoma cells. Our findings showed that Klotho could significantly and partially restore cell viability and decrease reactive oxygen species (known as ROS) and improve superoxide dismutase activity (SOD) in addition to reduction of caspase 3 activity and DNA fragmentation following Aβ1-42 challenge. In addition, exogenous Klotho also reduced inflammatory biomarkers consisting of nuclear factor-kB (NF-kB), interleukin-1β (IL-1β), and tumor necrosis factor-α (TNF-α) in Aβ-exposed cells. Besides, Klotho caused downregulation of Wnt1 level, upregulation of phosphorylated cyclic AMP response element binding (pCREB), and mRNA levels of nuclear factor erythroid 2-related factor 2 (Nrf2) and heme oxygenase 1 (HO-1) with no significant alteration of epsilon isoform of protein kinase C (PKCε) after Aβ toxicity. In summary, Klotho could alleviate apoptosis, oxidative stress, and inflammation in human neuroblastoma cells after Aβ challenge and its beneficial effect is partially exerted through appropriate modulation of Wnt1/pCREB/Nrf2/HO-1 signaling.
Collapse
|
29
|
Basic Limonoid modulates Chaperone-mediated Proteostasis and dissolve Tau fibrils. Sci Rep 2020; 10:4023. [PMID: 32132570 PMCID: PMC7055235 DOI: 10.1038/s41598-020-60773-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Accepted: 02/17/2020] [Indexed: 02/07/2023] Open
Abstract
The Alzheimer's disease pathology is associated with accumulation of intracellular neurofibrillary tangles and extracellular senile plaques. The formation of initial nucleus triggers conformational changes in Tau and leads to its deposition. Hence, there is a need to eliminate these toxic proteins for proper functioning of neuronal cells. In this aspect, we screened the effect of basic limonoids such as gedunin, epoxyazadiradione, azadirone and azadiradione on inhibiting Tau aggregation as well as disintegration of induced Tau aggregates. It was observed that these basic limonoids effectively prevented aggregates formation by Tau and also exhibited the property of destabilizing matured Tau aggregates. The molecular docking analysis suggests that the basic limonoids interact with hexapeptide regions of aggregated Tau. Although these limonoids caused the conformational changes in Tau to β-sheet structure, the cytological studies indicate that basic limonoids rescued cell death. The dual role of limonoids in Tau aggregation inhibition and disintegration of matured aggregates suggests them to be potent molecules in overcoming Tau pathology. Further, their origin from a medicinally important plant neem, which known to possess remarkable biological activities was also found to play protective role in HEK293T cells. Basic limonoids were non-toxic to HEK293T cells and also aided in activation of HSF1 by inducing its accumulation in nucleus. Western blotting and immunofluorescence studies showed that HSF1 in downstream increased the transcription of Hsp70 thus, aggravating cytosolic Hsp70 levels that can channel clearance of aberrant Tau. All these results mark basic limonoids as potential therapeutic natural products.
Collapse
|
30
|
Cho JH, Lee S, Jeon H, Kim AH, Lee W, Lee Y, Yang S, Yun J, Jung YS, Lee J. Tetrabromobisphenol A-Induced Apoptosis in Neural Stem Cells Through Oxidative Stress and Mitochondrial Dysfunction. Neurotox Res 2020; 38:74-85. [DOI: 10.1007/s12640-020-00179-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 01/28/2020] [Accepted: 02/06/2020] [Indexed: 12/11/2022]
|
31
|
Cao K, Dong YT, Xiang J, Xu Y, Li Y, Song H, Yu WF, Qi XL, Guan ZZ. The neuroprotective effects of SIRT1 in mice carrying the APP/PS1 double-transgenic mutation and in SH-SY5Y cells over-expressing human APP670/671 may involve elevated levels of α7 nicotinic acetylcholine receptors. Aging (Albany NY) 2020; 12:1792-1807. [PMID: 32003755 PMCID: PMC7053601 DOI: 10.18632/aging.102713] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 01/02/2020] [Indexed: 12/20/2022]
Abstract
The aim was to determine whether the neuroprotective effect of SIRT1 in Alzheimer’s disease (AD), due to inhibition of aggregation of the β-amyloid peptide (Aβ), involves activation of α7 nAChR. In present study, four-month-old APP/PS1 mice were administered resveratrol (RSV) or suramin once daily for two months, following which their spatial learning and memory were assessed using the Morris water maze test. Deposits of Aβ in vivo were detected by near-infrared imaging (NIRI) and confocal laser scanning. SH-SY5Y/APPswe cells were treated with RSV, suramin, U0126 or methyllycaconitine (MLA). Levels of proteins and mRNA were determined by Western blotting and qRT-PCR, respectively. The results show that activation of SIRT1 improved their spatial learning and memory and reduced the production and aggregation of Aβ in the hippocampus and cerebral cortex; whereas inhibition of SIRT1 had the opposite effects. In addition, activation of SIRT1 increased the levels of both α7 nAChR and αAPP in the brains these animals. Finally, activation of SIRT1 elevated the levels of pERK1/2, while inhibition of ERK1/2 counteracted the increase in α7 nAChR caused by RSV. These findings indicate that neuroprotection by SIRT1 may involve increasing levels of α7 nAChR through activation of the MAPK/ERK1/2 signaling pathway.
Collapse
Affiliation(s)
- Kun Cao
- Department of Pathology at Guizhou Medical University and Pathology Department in Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, P. R. of China
| | - Yang-Ting Dong
- Key Laboratory of Endemic and Ethnic Diseases of the Ministry of Education of P. R. China (Guizhou Medical University), Guiyang, Guizhou, P. R. of China.,Key Laboratory of Medical Molecular Biology, Guiyang, Guizhou, P. R. of China
| | - Jie Xiang
- Department of Pathology at Guizhou Medical University and Pathology Department in Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, P. R. of China
| | - Yi Xu
- Department of Pathology at Guizhou Medical University and Pathology Department in Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, P. R. of China.,Key Laboratory of Endemic and Ethnic Diseases of the Ministry of Education of P. R. China (Guizhou Medical University), Guiyang, Guizhou, P. R. of China.,Key Laboratory of Medical Molecular Biology, Guiyang, Guizhou, P. R. of China
| | - Yi Li
- Key Laboratory of Endemic and Ethnic Diseases of the Ministry of Education of P. R. China (Guizhou Medical University), Guiyang, Guizhou, P. R. of China.,Key Laboratory of Medical Molecular Biology, Guiyang, Guizhou, P. R. of China
| | - Hui Song
- Key Laboratory of Endemic and Ethnic Diseases of the Ministry of Education of P. R. China (Guizhou Medical University), Guiyang, Guizhou, P. R. of China.,Key Laboratory of Medical Molecular Biology, Guiyang, Guizhou, P. R. of China
| | - Wen-Feng Yu
- Key Laboratory of Endemic and Ethnic Diseases of the Ministry of Education of P. R. China (Guizhou Medical University), Guiyang, Guizhou, P. R. of China.,Key Laboratory of Medical Molecular Biology, Guiyang, Guizhou, P. R. of China
| | - Xiao-Lan Qi
- Key Laboratory of Endemic and Ethnic Diseases of the Ministry of Education of P. R. China (Guizhou Medical University), Guiyang, Guizhou, P. R. of China.,Key Laboratory of Medical Molecular Biology, Guiyang, Guizhou, P. R. of China
| | - Zhi-Zhong Guan
- Department of Pathology at Guizhou Medical University and Pathology Department in Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, P. R. of China.,Key Laboratory of Endemic and Ethnic Diseases of the Ministry of Education of P. R. China (Guizhou Medical University), Guiyang, Guizhou, P. R. of China.,Key Laboratory of Medical Molecular Biology, Guiyang, Guizhou, P. R. of China
| |
Collapse
|
32
|
El-Desouky MA, Fahmi AA, Abdelkader IY, Nasraldin KM. Anticancer Effect of Amygdalin (Vitamin B-17) on Hepatocellular Carcinoma Cell Line (HepG2) in the Presence and Absence of Zinc. Anticancer Agents Med Chem 2020; 20:486-494. [PMID: 31958042 DOI: 10.2174/1871520620666200120095525] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 08/28/2019] [Accepted: 11/21/2019] [Indexed: 12/28/2022]
Abstract
BACKGROUND Amygdalin (Vitamin B-17) is a naturally occurring vitamin found in the seeds of the fruits of Prunus Rosacea family including apricot, bitter almond, cherry, and peach. OBJECTIVE The purpose of this study was to examine the effect of amygdalin with and without zinc on hepatocellular carcinoma (HepG2) cell line. METHODS MTT assay was used to evaluate the cytotoxicity of amygdalin without zinc, amygdalin + 20μmol zinc, and amygdalin + 800μmol zinc on HepG2 cell lines. The cell cycle distribution assay was determined by flow cytometry. Apoptosis was confirmed by Annexin V-FITC/PI staining assay. Moreover, the pathway of apoptosis was determined by the percentage of change in the mean levels of P53, Bcl2, Bax, cytochrome c, and caspase-3. RESULTS Amygdalin without zinc showed strong anti-HepG2 activity. Furthermore, HepG2 cell lines treatment with amygdalin + 20μmol zinc and amygdalin + 800μmol zinc showed a highly significant apoptotic effect than the effect of amygdalin without zinc. Amygdalin treatment induced cell cycle arrest at G2/M and increased the levels of P53, Bax, cytochrome c, and caspase-3 significantly, while it decreased the level of anti-apoptotic Bcl2. CONCLUSION Amygdalin is a natural anti-cancer agent, which can be used for the treatment of hepatocellular carcinoma. It promotes apoptosis via the intrinsic cell death pathway (the mitochondria-initiated pathway) and cell cycle arrest at G/M. The potency of amygdalin in HepG2 treatment increased significantly by the addition of zinc.
Collapse
Affiliation(s)
| | - Abdelgawad A Fahmi
- Department of Chemistry, Faculty of Science, Cairo University, Cairo, Egypt
| | - Ibrahim Y Abdelkader
- Department of Medical Sciences, Faculty of Dentistry, The British University in Egypt (BUE), El-Shorouk, Egypt
| | - Karima M Nasraldin
- Department of Medical Sciences, Faculty of Dentistry, The British University in Egypt (BUE), El-Shorouk, Egypt
| |
Collapse
|
33
|
Hao N, Shen W, Du R, Jiang S, Zhu J, Chen Y, Huang C, Shi Y, Xiang R, Luo Y. Phosphodiesterase 3A Represents a Therapeutic Target that Drives Stem Cell–like Property and Metastasis in Breast Cancer. Mol Cancer Ther 2019; 19:868-881. [PMID: 31871268 DOI: 10.1158/1535-7163.mct-18-1233] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 02/19/2019] [Accepted: 12/03/2019] [Indexed: 11/16/2022]
MESH Headings
- Animals
- Apoptosis
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Breast Neoplasms/drug therapy
- Breast Neoplasms/enzymology
- Breast Neoplasms/pathology
- Breast Neoplasms/secondary
- Cell Proliferation
- Cilostazol/pharmacology
- Cyclic Nucleotide Phosphodiesterases, Type 3/chemistry
- Cyclic Nucleotide Phosphodiesterases, Type 3/genetics
- Cyclic Nucleotide Phosphodiesterases, Type 3/metabolism
- Female
- Gene Expression Regulation, Enzymologic/drug effects
- Gene Expression Regulation, Neoplastic/drug effects
- Humans
- Mice
- Mice, Inbred NOD
- Mice, SCID
- Microfilament Proteins/metabolism
- Middle Aged
- Neoplastic Stem Cells/drug effects
- Neoplastic Stem Cells/enzymology
- Neoplastic Stem Cells/metabolism
- Phosphodiesterase 3 Inhibitors/pharmacology
- Prognosis
- Protein Transport
- Signal Transduction
- Tumor Cells, Cultured
- Vesicular Transport Proteins/metabolism
- Xenograft Model Antitumor Assays
Collapse
Affiliation(s)
- Na Hao
- Department of Breast Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Department of Immunology, School of Medicine, Nankai University, Tianjin, China
- Department of Immunology, Institute of Basic Medical Science, Chinese Academy of Medical Science, School of Basic Medicine Peking Union Medical College, Beijing, China
- International Joint Center for Biomedical Research of the Ministry of Education, Tianjin, China
| | - Wenzhi Shen
- Department of Immunology, School of Medicine, Nankai University, Tianjin, China
- Department of Immunology, Institute of Basic Medical Science, Chinese Academy of Medical Science, School of Basic Medicine Peking Union Medical College, Beijing, China
- Department of Pathology and Institute of Precision Medicine, Jining Medical University, Jining, China
| | - Renle Du
- Department of Breast Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Shan Jiang
- Department of Breast Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Junyong Zhu
- Department of Galactophore, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Yanan Chen
- Department of Breast Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Department of Immunology, Institute of Basic Medical Science, Chinese Academy of Medical Science, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Chongbiao Huang
- Senior Ward, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research, Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Yi Shi
- Department of Breast Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Department of Immunology, Institute of Basic Medical Science, Chinese Academy of Medical Science, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Rong Xiang
- Department of Breast Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Department of Immunology, Institute of Basic Medical Science, Chinese Academy of Medical Science, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Yunping Luo
- Department of Immunology, School of Medicine, Nankai University, Tianjin, China.
| |
Collapse
|
34
|
Meng J, Chen Y, Bi F, Li H, Chang C, Liu W. Pterostilbene attenuates amyloid-β induced neurotoxicity with regulating PDE4A-CREB-BDNF pathway. Am J Transl Res 2019; 11:6356-6369. [PMID: 31737188 PMCID: PMC6834512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 07/06/2019] [Indexed: 06/10/2023]
Abstract
Amyloid-β (Aβ) is considered partially responsible for cognitive dysfunction in Alzheimer's disease (AD). Resveratrol is known as an anti-neurotoxicity potential natural product, however low blood-brain-barrier (BBB) permissibility and low oral-bioavailability (OB) are the main limitations on its clinical potential. In this study, we illustrated that Pterostilbene (PTS), a kind of resveratrol analog which showed higher scores on BBB and OB, could overcome Aβ-induced neurotoxicity in vitro and in vivo. In silico simulation indicated PTS binding with PDE4A may contribute to its anti-apoptosis and anti-neurotoxicity effects. Behavioral tests further confirmed PTS' potential of overcoming memory deficits in APP/PS1 mice (AD model). Interestingly, PTS also rescued the reducing in dendritic spine density in APP/PS1 mice based on Golgi-Cox staining. Besides, as results of reversing Aβ-induced decreases in cyclic-AMP level, PTS increased the pVASP, pCREB, BDNF, and PSD95 expression. Overall, PTS protects neurons against Aβ-induced neurotoxicity and cognitive dysfunction through regulating the PDE4A-CREB-BDNF pathway. Therefore, targeting on PDE4A, PTS would be a qualified natural product for alleviating Aβ-induced neurotoxicity in AD.
Collapse
Affiliation(s)
- Jiao Meng
- Central Laboratory of Medicine School, Xi’an Peihua UniversityXi’an 710100, China
| | - Yuhua Chen
- Central Laboratory of Medicine School, Xi’an Peihua UniversityXi’an 710100, China
- Department of Medical Science Research Center, Shaanxi Fourth People’s HospitalXi’an 710143, China
| | - Fangfang Bi
- Central Laboratory of Medicine School, Xi’an Peihua UniversityXi’an 710100, China
- Department of Medical Science Research Center, Shaanxi Fourth People’s HospitalXi’an 710143, China
| | - Hua Li
- Department of Medical Science Research Center, Shaanxi Fourth People’s HospitalXi’an 710143, China
| | - Cuicui Chang
- Central Laboratory of Medicine School, Xi’an Peihua UniversityXi’an 710100, China
| | - Wei Liu
- Department of Medical Science Research Center, Shaanxi Fourth People’s HospitalXi’an 710143, China
| |
Collapse
|
35
|
Nabavi SM, Talarek S, Listos J, Nabavi SF, Devi KP, Roberto de Oliveira M, Tewari D, Argüelles S, Mehrzadi S, Hosseinzadeh A, D'onofrio G, Orhan IE, Sureda A, Xu S, Momtaz S, Farzaei MH. Phosphodiesterase inhibitors say NO to Alzheimer's disease. Food Chem Toxicol 2019; 134:110822. [PMID: 31536753 DOI: 10.1016/j.fct.2019.110822] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 09/13/2019] [Accepted: 09/14/2019] [Indexed: 12/18/2022]
Abstract
Phosphodiesterases (PDEs) consisted of 11 subtypes (PDE1 to PDE11) and over 40 isoforms that regulate levels of cyclic guanosine monophosphate (cGMP) and cyclic adenosine monophosphate (cAMP), the second messengers in cell functions. PDE inhibitors (PDEIs) have been attractive therapeutic targets due to their involvement in diverse medical conditions, e.g. cardiovascular diseases, autoimmune diseases, Alzheimer's disease (AD), etc. Among them; AD with a complex pathology is a progressive neurodegenerative disorder which affect mostly senile people in the world and only symptomatic treatment particularly using cholinesterase inhibitors in clinic is available at the moment for AD. Consequently, novel treatment strategies towards AD are still searched extensively. Since PDEs are broadly expressed in the brain, PDEIs are considered to modulate neurodegenerative conditions through regulating cAMP and cGMP in the brain. In this sense, several synthetic or natural molecules inhibiting various PDE subtypes such as rolipram and roflumilast (PDE4 inhibitors), vinpocetine (PDE1 inhibitor), cilostazol and milrinone (PDE3 inhibitors), sildenafil and tadalafil (PDE5 inhibitors), etc have been reported showing encouraging results for the treatment of AD. In this review, PDE superfamily will be scrutinized from the view point of structural features, isoforms, functions and pharmacology particularly attributed to PDEs as target for AD therapy.
Collapse
Affiliation(s)
- Seyed Mohammad Nabavi
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Sylwia Talarek
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, Chodźki 4a St, 20-093, Lublin, Poland.
| | - Joanna Listos
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, Chodźki 4a St, 20-093, Lublin, Poland.
| | - Seyed Fazel Nabavi
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Kasi Pandima Devi
- Department of Biotechnology, Alagappa University, Karaikudi, 630003, Tamil Nadu, India.
| | - Marcos Roberto de Oliveira
- Departamento de Química (DQ), Instituto de Ciências Exatas e da Terra (ICET), Universidade Federal de Mato Grosso (UFMT), Cuiabá, Brazil.
| | - Devesh Tewari
- Department of Pharmacognosy, School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, 144411, Punjab, India.
| | - Sandro Argüelles
- Department of Physiology, Faculty of Pharmacy, University of Seville, Seville, Spain.
| | - Saeed Mehrzadi
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran.
| | - Azam Hosseinzadeh
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Grazia D'onofrio
- Geriatric Unit and Gerontology-Geriatrics Research Laboratory, Department of Medical Sciences, IRCCS "Casa Sollievo della Sofferenza", Viale Cappuccini 1, 71013, San Giovanni Rotondo, FG, Italy.
| | - Ilkay Erdogan Orhan
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330, Ankara, Turkey.
| | - Antoni Sureda
- Research Group on Community Nutrition and Oxidative Stress, University of Balearic Islands, CIBEROBN (Physiopathology of Obesity and Nutrition), E-07122, Palma de Mallorca, Balearic Islands, Spain.
| | - Suowen Xu
- Aab Cardiovascular Research Institute, University of Rochester, Rochester, NY, 14623, USA.
| | - Saeedeh Momtaz
- Medicinal Plants Research Center, Institute of Medicinal Plants, ACECR, Karaj, Iran; Toxicology and Diseases Group, The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Hosein Farzaei
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| |
Collapse
|
36
|
Zhang YP, Liu KL, Yang Z, Lu BS, Qi JC, Han ZW, Yin YW, Zhang M, Chen DM, Wang XW, Li W, Xin H. The involvement of FBP1 in prostate cancer cell epithelial mesenchymal transition, invasion and metastasis by regulating the MAPK signaling pathway. Cell Cycle 2019; 18:2432-2446. [PMID: 31448674 DOI: 10.1080/15384101.2019.1648956] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Prostate cancer (PCa) is a frequently occurring malignancy in males, and epithelial mesenchymal transition (EMT) plays a critical role in PCa metastasis. Thus, developing biomarkers inhibiting EMT may provide significance for treatment of PCa. Hence, the aim of the current study was to investigate the mechanism by which FBP1 gene silencing influences PCa cell EMT, invasion and metastasis by mediating the MAPK pathway. PCa cell lines exhibiting the highest FBP1 expression were selected and treated with plasmids of siRNA-FBP1 sequence 1 and 2, pcDNA3.1-Flag-FBP1 (over-expression plasmid of FBP1), U0126 (an inhibitor of the ERK signaling pathway) and PD98059 (an inhibitor of the MEK signaling pathway). Cell proliferation, migration and invasion were detected by MTT assay, wound healing assay and Transwell assay, respectively. The mRNA and protein expression of related factors of EMT and MAPK signaling were determined by RT-qPCR and western blot analysis, respectively. Xenograft tumor growth after inoculation of DU145 cells was regularly analyzed in the nude mice. The positive expression of EMT markers was determined by immunohistochemistry. DU-145 and PC-3 cells displaying the highest FBP1 expression were selected for further analysis. The PCa cells treated with siRNA-FBP1 exhibited increased proliferation, migration rate and invasion, in addition to facilitated xenograft tumor growth. Notably, siRNA-FBP1 was identified to accelerate PCa cell EMT by elevating the expression of Vimentin and N-cadherin while diminishing E-cadherin expression via activation of the MAPK signaling pathway. The aforementioned results were reversed in PCa cells treated by pcDNA3.1-Flag-FBP1. Evidence has been provided in this study that FBP1 gene silencing activates the MAPK pathway, which ultimately promotes cell EMT, invasion and metastasis in PCa.
Collapse
Affiliation(s)
- Yan-Ping Zhang
- Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| | - Kai-Long Liu
- Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| | - Zhan Yang
- Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| | - Bao-Sai Lu
- Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| | - Jin-Chun Qi
- Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| | - Zhen-Wei Han
- Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| | - Yue-Wei Yin
- Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| | - Ming Zhang
- Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| | - De-Min Chen
- Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| | - Xiao-Wei Wang
- Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| | - Wei Li
- Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| | - Hong Xin
- Department of Obstetrics, The Second Hospital of Hebei Medical University , Shijiazhuang , P.R. China
| |
Collapse
|
37
|
Fernandes J, Chandler JD, Lili LN, Uppal K, Hu X, Hao L, Go YM, Jones DP. Transcriptome Analysis Reveals Distinct Responses to Physiologic versus Toxic Manganese Exposure in Human Neuroblastoma Cells. Front Genet 2019; 10:676. [PMID: 31396262 PMCID: PMC6668488 DOI: 10.3389/fgene.2019.00676] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 06/27/2019] [Indexed: 12/16/2022] Open
Abstract
Manganese (Mn) is an essential trace element, which also causes neurotoxicity in exposed occupational workers. Mn causes mitochondrial toxicity; however, little is known about transcriptional responses discriminated by physiological and toxicological levels of Mn. Identification of such mechanisms could provide means to evaluate risk of Mn toxicity and also potential avenues to protect against adverse effects. To study the Mn dose-response effects on transcription, analyzed by RNA-Seq, we used human SH-SY5Y neuroblastoma cells exposed for 5 h to Mn (0 to 100 μM), a time point where no immediate cell death occurred at any of the doses. Results showed widespread effects on abundance of protein-coding genes for metabolism of reactive oxygen species, energy sensing, glycolysis, and protein homeostasis including the unfolded protein response and transcriptional regulation. Exposure to a concentration (10 μM Mn for 5 h) that did not result in cell death after 24-h increased abundance of differentially expressed genes (DEGs) in the protein secretion pathway that function in protein trafficking and cellular homeostasis. These include BET1 (Golgi vesicular membrane-trafficking protein), ADAM10 (ADAM metallopeptidase domain 10), and ARFGAP3 (ADP-ribosylation factor GTPase-activating protein 3). In contrast, 5-h exposure to 100 μM Mn, a concentration that caused cell death after 24 h, increased abundance of DEGs for components of the mitochondrial oxidative phosphorylation pathway. Integrated pathway analysis results showed that protein secretion gene set was associated with amino acid metabolites in response to 10 μM Mn, while oxidative phosphorylation gene set was associated with energy, lipid, and neurotransmitter metabolites at 100 μM Mn. These results show that differential effects of Mn occur at a concentration which does not cause subsequent cell death compared to a concentration that causes subsequent cell death. If these responses translate to effects on the secretory pathway and mitochondrial functions in vivo, differential activities of these systems could provide a sensitive basis to discriminate sub-toxic and toxic environmental and occupational Mn exposures.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Young-Mi Go
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA, United States
| | - Dean P. Jones
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA, United States
| |
Collapse
|
38
|
de Matos AM, Martins A, Man T, Evans D, Walter M, Oliveira MC, López Ó, Fernandez-Bolaños JG, Dätwyler P, Ernst B, Macedo MP, Contino M, Colabufo NA, Rauter AP. Design and Synthesis of CNS-targeted Flavones and Analogues with Neuroprotective Potential Against H 2O 2- and Aβ 1-42-Induced Toxicity in SH-SY5Y Human Neuroblastoma Cells. Pharmaceuticals (Basel) 2019; 12:ph12020098. [PMID: 31234364 PMCID: PMC6630837 DOI: 10.3390/ph12020098] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/05/2019] [Accepted: 06/06/2019] [Indexed: 01/15/2023] Open
Abstract
With the lack of available drugs able to prevent the progression of Alzheimer’s disease (AD), the discovery of new neuroprotective treatments able to rescue neurons from cell injury is presently a matter of extreme importance and urgency. Here, we were inspired by the widely reported potential of natural flavonoids to build a library of novel flavones, chromen-4-ones and their C-glucosyl derivatives, and to explore their ability as neuroprotective agents with suitable pharmacokinetic profiles. All compounds were firstly evaluated in a parallel artificial membrane permeability assay (PAMPA) to assess their effective permeability across biological membranes, namely the blood-brain barrier (BBB). With this test, we aimed not only at assessing if our candidates would be well-distributed, but also at rationalizing the influence of the sugar moiety on the physicochemical properties. To complement our analysis, logD7.4 was determined. From all screened compounds, the p-morpholinyl flavones stood out for their ability to fully rescue SH-SY5Y human neuroblastoma cells against both H2O2- and Aβ1-42-induced cell death. Cholinesterase inhibition was also evaluated, and modest inhibitory activities were found. This work highlights the potential of C-glucosylflavones as neuroprotective agents, and presents the p-morpholinyl C-glucosylflavone 37, which did not show any cytotoxicity towards HepG2 and Caco-2 cells at 100 μM, as a new lead structure for further development against AD.
Collapse
Affiliation(s)
- Ana M de Matos
- Center of Chemistry and Biochemistry, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016 Lisboa, Portugal.
- Centro de Química Estrutural, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016 Lisboa, Portugal.
- MEDIR: Metabolic Disorders, CEDOC Chronic Diseases, Nova Medical School, Campus Sant'Ana, Rua Câmara Pestana, 6, Lab 3.8, 1150-082 Lisboa, Portugal.
| | - Alice Martins
- Center of Chemistry and Biochemistry, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016 Lisboa, Portugal.
| | - Teresa Man
- Department of Chemistry, Erl Wood Manor, Eli Lilly, Windlesham, Surrey GU20 6PH, UK.
| | - David Evans
- Department of Chemistry, Erl Wood Manor, Eli Lilly, Windlesham, Surrey GU20 6PH, UK.
| | - Magnus Walter
- Abbvie Germany, Knollstr. 51, 67061 Ludwigshafen, Germany.
| | - Maria Conceição Oliveira
- Centro de Química Estrutural, Instiuto Superior Técnico, Ulisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Óscar López
- Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, Apartado 1203, E-41071 Sevilla, Spain.
| | - José G Fernandez-Bolaños
- Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, Apartado 1203, E-41071 Sevilla, Spain.
| | - Philipp Dätwyler
- Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland.
| | - Beat Ernst
- Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland.
| | - M Paula Macedo
- MEDIR: Metabolic Disorders, CEDOC Chronic Diseases, Nova Medical School, Campus Sant'Ana, Rua Câmara Pestana, 6, Lab 3.8, 1150-082 Lisboa, Portugal.
- Department of Medical Sciences, IBIMED, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
- APDP-ERC, APDP-Diabetes Portugal, Rua do Salitre, Nº 118-120, 1250-203 Lisboa, Portugal.
| | - Marialessandra Contino
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari/Biofordrug, Via Edoardo Orabona, 4-70125 Bari, Italy.
| | - Nicola A Colabufo
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari/Biofordrug, Via Edoardo Orabona, 4-70125 Bari, Italy.
| | - Amélia P Rauter
- Center of Chemistry and Biochemistry, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016 Lisboa, Portugal.
- Centro de Química Estrutural, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016 Lisboa, Portugal.
| |
Collapse
|
39
|
Wang Y, Zhang Y, Zhang X, Yang T, Liu C, Wang P. Alcohol Dehydrogenase 1B Suppresses β-Amyloid-Induced Neuron Apoptosis. Front Aging Neurosci 2019; 11:135. [PMID: 31231206 PMCID: PMC6560161 DOI: 10.3389/fnagi.2019.00135] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 05/21/2019] [Indexed: 01/01/2023] Open
Abstract
β-amyloid (Aβ) deposition, neurofibrillary tangles induced by phosphorylation of tau protein, and neuronal apoptosis are pathological hallmarks of Alzheimer’s disease (AD). The dementia rate in alcoholic abusers were found to be higher than in control people. The present study explored the potential roles of alcohol dehydrogenase 1B (ADH1B) in AD pathology by determining the ADH1B levels in AD patient sera, in the hippocampus of APP/PS-1 AD model mice, and in an AD model cell line treated with Aβ1-42. The results show that ADH1B levels decreased significantly both in the serum of AD patients and in the hippocampus of APP/PS-1 AD model mice. In addition, the apoptotic rate was reduced and viability was significantly increased in AD model cells transfected with ADH1B overexpression vector. The levels of the p75 neurotrophin receptor (p75NTR), an Aβ1-42 receptor, were down-regulated in the ADH1B overexpressing AD model cell and up-regulated in cells transfected with the shRNA vector of ADH1B. Protein levels of cleaved caspase-3 and Bax decreased significantly, whereas Bcl-2 levels increased in cells overexpressing ADH1B. The opposite trend was observed for cleaved caspase-3, Bax, and Bcl-2 levels in cells transfected with the shRNA vector of ADH1B. The levels of reactive oxygen species (ROS) were found to be reduced in ADH1B overexpressing cells and increased when cells were transfected with the shRNA vector of ADH1B. These results indicate that ADH1B might be important in the prevention of AD, especially for abusers of alcohol, and a potential new target of AD treatment.
Collapse
Affiliation(s)
- Yaqi Wang
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yi Zhang
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Xiaomin Zhang
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Tingting Yang
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Chengeng Liu
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Peichang Wang
- Clinical Laboratory of Xuanwu Hospital, Capital Medical University, Beijing, China
| |
Collapse
|
40
|
Ono K, Tsuji M. Pharmacological Potential of Cilostazol for Alzheimer's Disease. Front Pharmacol 2019; 10:559. [PMID: 31191308 PMCID: PMC6540873 DOI: 10.3389/fphar.2019.00559] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Accepted: 05/03/2019] [Indexed: 12/23/2022] Open
Abstract
Alzheimer’s disease (AD), a slow progressive form of dementia, is clinically characterized by cognitive dysfunction and memory impairment and neuropathologically characterized by the accumulation of extracellular plaques containing amyloid β-protein (Aβ) and neurofibrillary tangles containing tau in the brain, with neuronal degeneration and high level of oxidative stress. The current treatments for AD, e.g., acetylcholinesterase inhibitors (AChEIs), have efficacies limited to symptom improvement. Although there are various approaches to the disease modifying therapies of AD, none of them can be used alone for actual treatment, and combination therapy may be needed for amelioration of the progression. There are reports that cilostazol (CSZ) suppressed cognitive decline progression in patients with mild cognitive impairment or stable AD receiving AChEIs. Previously, we showed that CSZ suppressed Aβ-induced neurotoxicity in SH-SY5Y cells via coincident inhibition of oxidative stress, as demonstrated by reduced activity of nicotinamide adenine dinucleotide phosphate oxidase, accumulation of reactive oxygen species, and signaling of mitogen-activated protein kinase. CSZ also rescued cognitive impairment and promoted soluble Aβ clearance in a mouse model of cerebral amyloid angiopathy. Mature Aβ fibrils have long been considered the primary neurodegenerative factors in AD; however, recent evidence indicates soluble oligomers to initiate the neuronal and synaptic dysfunction related to AD and other protein-misfolding diseases. Further underscoring the potential of CSZ for AD treatment, we recently described the inhibitory effects of CSZ on Aβ oligomerization and aggregation in vitro. In this review, we discuss the possibility of CSZ as a potential disease-modifying therapy for the prevention or delay of AD.
Collapse
Affiliation(s)
- Kenjiro Ono
- Division of Neurology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Mayumi Tsuji
- Department of Pharmacology, Showa University School of Medicine, Tokyo, Japan
| |
Collapse
|
41
|
Lee JY, Lee H, Yoo HB, Choi JS, Jung HY, Yoon EJ, Kim H, Jung YH, Lee HY, Kim YK. Efficacy of Cilostazol Administration in Alzheimer's Disease Patients with White Matter Lesions: A Positron-Emission Tomography Study. Neurotherapeutics 2019; 16:394-403. [PMID: 30761509 PMCID: PMC6554387 DOI: 10.1007/s13311-018-00708-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
This study tested the efficacy of the phosphodiesterase type III inhibitor cilostazol in Alzheimer's disease patients with white matter lesions treated with donepezil in comparison with donepezil monotherapy using fluorodeoxyglucose (18F) positron-emission tomography (FDG PET). A 24-week, randomized, double-blind, placebo-controlled, parallel-group study was conducted. Thirty-six Alzheimer's disease patients with white matter lesions who received donepezil (n = 18 each in the cilostazol and placebo groups) were enrolled. Participants underwent pre and post FDG PET imaging scans and three rounds of clinical and neuropsychological tests. The cilostazol group did not show a significant decrease of regional glucose metabolism; however, regional glucose metabolism was significantly decreased in the parietal and frontal lobes of the placebo group. The repeated measures ANOVA measuring differences in uptake change revealed that regional glucose metabolism in the left inferior frontal gyrus was significantly more preserved in the cilostazol group than that in the placebo group (p < 0.005). Mean changes from baseline on the Mini-Mental State Exam, Alzheimer's Disease Assessment Scale-cognitive subscale, Alzheimer's Disease Cooperative Study-Activities of Daily Living Inventory, and the Clinical Dementia Rating Sum of Boxes did not differ between the two groups. In the cilostazol group, the increase of glucose metabolism correlated with the improvment of the Alzheimer's Disease Assessment Scale-cognitive score. We conclude that cilostazol treatment added to donepezil may delay the decline in regional cerebral metabolism in Alzheimer's disease with white matter lesions compared with donepezil monotherapy. In additon, our results verified the efficacy of cilostazol in improving or protecting cognitive function in Alzheimer's disease through increased glucose metabolism. However, the long-term effect of cilostazol on cognitive function and Alzheimer's disease modification must be tested in further studies with larger sample size and longer study period. Trial registration: http://clinicaltrials.gov : NCT01409564.
Collapse
Affiliation(s)
- Jun-Young Lee
- Department of Psychiatry and Neuroscience Research Institute, Seoul National University College of Medicine & SMG-SNU Boramae Medical Center, Dongjak-gu, Seoul, Republic of Korea
| | - Haewoo Lee
- Department of Psychiatry, Seoul Medical Center, Jungnang-gu, Seoul, Republic of Korea
| | - Hye Bin Yoo
- School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson, Texas, USA
| | - Jung-Seok Choi
- Department of Psychiatry and Neuroscience Research Institute, Seoul National University College of Medicine & SMG-SNU Boramae Medical Center, Dongjak-gu, Seoul, Republic of Korea
| | - Hee-Yeon Jung
- Department of Psychiatry and Neuroscience Research Institute, Seoul National University College of Medicine & SMG-SNU Boramae Medical Center, Dongjak-gu, Seoul, Republic of Korea
| | - Eun Jin Yoon
- Department of Nuclear Medicine, Seoul National University College of Medicine & SMG-SNU Boramae Medical Center, Dongjak-gu, Seoul, Republic of Korea
| | - Hongrae Kim
- Department of Psychiatry and Neuroscience Research Institute, Seoul National University College of Medicine & SMG-SNU Boramae Medical Center, Dongjak-gu, Seoul, Republic of Korea
| | - Ye-Ha Jung
- Department of Psychiatry and Neuroscience Research Institute, Seoul National University College of Medicine & SMG-SNU Boramae Medical Center, Dongjak-gu, Seoul, Republic of Korea
| | - Ho-Young Lee
- Department of Nuclear Medicine, Seoul National University College of Medicine & Bundang Hospital, Seongnam, Republic of Korea
| | - Yu Kyeong Kim
- Department of Nuclear Medicine, Seoul National University College of Medicine & SMG-SNU Boramae Medical Center, Dongjak-gu, Seoul, Republic of Korea.
| |
Collapse
|
42
|
Xu J, Zhou L, Weng Q, Xiao L, Li Q. Curcumin analogues attenuate Aβ 25-35-induced oxidative stress in PC12 cells via Keap1/Nrf2/HO-1 signaling pathways. Chem Biol Interact 2019; 305:171-179. [PMID: 30946834 DOI: 10.1016/j.cbi.2019.01.010] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 12/21/2018] [Accepted: 01/06/2019] [Indexed: 12/24/2022]
Abstract
Beta-amyloid (Aβ) has pivotal functions in the pathogenesis of Alzheimer's Disease (AD). In the present study, we adopted an vitro model that involved Aβ25-35-induced oxidative damage in PC12 cells. Aβ25-35 (10 μΜ) treatment for 24 h induced significant cell death and oxidative stress in PC12 cells, as evidenced by cell viability reduction, LDH release, ROS accumulation and increased production MDA. (1E,4E)-1, 5-bis(4-hydroxy-3-methoxyphenyl) penta-1, 4-dien-3-one (CB) and (1E, 4E)-1-(3, 4-dimethoxyphenyl)-5-(4-hydroxy-3, 5-dime-thoxyphenyl) Penta-1, 4-dien-3-one (FE), two Curcumin (Cur) analogues displayed neuroprotective effects against Aβ25-35-induced oxidative damage and cellular apoptosis in PC12 cells. Here, we investigated three different treatment ways of CB and FE. It was interesting that post-treatment of CB and FE (restoring way) showed similar effect to the preventive way, while attenuating way did not show any protective effect. We found that low dose CB and FE increased transcriptional factor NF-E2-related factor 2 (Nrf2)/hemo oxygenase 1 (HO-1) protein expression and decreased Kelch-like ECH-associated protein 1 (Keap1) in PC 12 cells. In addition, CB and FE promoted the translation of Nrf2 into nuclear and enhanced the activity of superoxide dismutase (SOD)/catalase, which confirmed cytoprotection against Aβ25-35-induced oxidative damage. Moreover, CB and FE could increase Bcl-2 expression level, decrease the level of Bax and Cyt-c in Aβ25-35-treated PC12 cells. Ultimately, the neuroprotective effect of CB and FE provides a pharmacological basis for its clinical use in prevention and treatment of AD.
Collapse
Affiliation(s)
- Jialin Xu
- College of Pharmaceutical Science, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang, 310014, PR China
| | - Leilei Zhou
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang, 310014, PR China
| | - Qi Weng
- College of Pharmaceutical Science, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang, 310014, PR China
| | - Linxia Xiao
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang, 310014, PR China
| | - Qingyong Li
- College of Pharmaceutical Science, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang, 310014, PR China; Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang, 310014, PR China.
| |
Collapse
|
43
|
Bezafibrate In Vivo Administration Prevents 3-Methylglutaric Acid-Induced Impairment of Redox Status, Mitochondrial Biogenesis, and Neural Injury in Brain of Developing Rats. Neurotox Res 2019; 35:809-822. [DOI: 10.1007/s12640-019-00019-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 02/19/2019] [Accepted: 02/22/2019] [Indexed: 12/18/2022]
|
44
|
Yang Q, Lin J, Zhang H, Liu Y, Kan M, Xiu Z, Chen X, Lan X, Li X, Shi X, Li N, Qu X. Ginsenoside Compound K Regulates Amyloid β via the Nrf2/Keap1 Signaling Pathway in Mice with Scopolamine Hydrobromide-Induced Memory Impairments. J Mol Neurosci 2018; 67:62-71. [PMID: 30535776 DOI: 10.1007/s12031-018-1210-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 11/08/2018] [Indexed: 12/14/2022]
Abstract
The objective of this study was to investigate the neuroprotective and antioxidant effects of ginsenoside compound K (CK) in a model of scopolamine hydrobromide-induced, memory-impaired mice. The role of CK in the regulation of amyloid β (Aβ) and its capacity to activate the Nrf2/Keap1 signaling pathway were also studied due to their translational relevance to Alzheimer's disease. The Morris water maze was used to assess spatial memory functions. Levels of superoxide dismutase, glutathione peroxidase, and malondialdehyde in brain tissues were tested. Cell morphology was detected by hematoxylin and eosin staining and terminal deoxynucleotidyl transferase deoxyuridine triphosphate nick end labeling assay. Immunohistochemistry and western blotting were used to determine expression levels of Nrf2/Keap1 signaling pathway-related factors and Aβ. Ginsenoside CK was found to enhance memory function, normalize neuronal morphology, decrease neuronal apoptosis, increase superoxide dismutase and glutathione peroxidase levels, reduce malondialdehyde levels, inhibit Aβ expression, and activate the Nrf2/Keap1 signaling pathway in scopolamine-exposed animals. Based on these results, we conclude that CK may improve memory function in scopolamine-injured mice by regulating Aβ aggregation and promoting the transduction of the Nrf2/Keap1 signaling pathway, thereby reducing oxidative damage to neurons and inhibiting neuronal apoptosis. This study suggests that CK may serve as a future preventative agent or treatment for Alzheimer's disease.
Collapse
Affiliation(s)
- Qing Yang
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China
| | - Jianan Lin
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China
| | - Huiyuan Zhang
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China
| | - Yingna Liu
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China
| | - Mo Kan
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China
| | - Zhiru Xiu
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China
| | - Xijun Chen
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China
| | - Xingcheng Lan
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China
| | - Xiaohua Li
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China
| | - Xiaozheng Shi
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China
| | - Na Li
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China.
| | - Xiaobo Qu
- Laboratory of Molecular Pharmacology, Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China.
| |
Collapse
|
45
|
Wang Y, Jia A, Ma W. Dexmedetomidine attenuates the toxicity of β‑amyloid on neurons and astrocytes by increasing BDNF production under the regulation of HDAC2 and HDAC5. Mol Med Rep 2018; 19:533-540. [PMID: 30483749 DOI: 10.3892/mmr.2018.9694] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 06/06/2018] [Indexed: 11/06/2022] Open
Abstract
Cytotoxicity of β-Amyloid (Aβ) is a major contributor to the pathogenesis of Alzheimer's disease. Dexmedetomidine (Dex) has been revealed to have multiple neuroprotective actions as a clinical anesthetic agent. The aim of the present study was to investigate the protection of Dex against Aβ in neurons and astrocytes, and the possible protective mechanisms. Primary neurons and astrocytes were isolated respectively from the hippocampus and cerebral cortex of neonatal Sprague Dawley rats. The neurons and astrocytes were incubated with Aβ in the presence or absence of Dex, which was followed by evaluation of the cell viability and apoptosis. Reverse transcription‑quantitative polymerase chain reaction, western blotting and ELISA assays were performed to assess the levels of specific genes or proteins. The results revealed that Aβ decreased the viabilities of neurons and astrocytes in a dose‑dependent manner, and elevated the rate of apoptosis. However, Dex attenuated the detrimental effects of Aβ. Aβ caused deacetylation of histone H3 by promoting the accumulation of histone deacetylase (HDAC)‑2 and HDAC5 in the cell nucleus, resulting in the reduced production of brain‑derived neurotrophic factor (BDNF). However, Dex reversed the Aβ‑induced deacetylation of histone H3 and thus, increased BDNF production. Using a HDAC inhibitor or recombinant BDNF protein also protected the neurons and astrocytes against Aβ cytotoxicity. These results suggested that the protective effect of Dex against Aβ is particularly relevant to BDNF. Thus, the present study provides a foundation for the further study of Dex protection against Aβ in animal models and pre‑clinical researches.
Collapse
Affiliation(s)
- Yueling Wang
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Aijun Jia
- Department of Respiratory Medicine and Intensive Care Unit, The Affiliated Hospital of Guilin Medical University, Guilin, Guangxi 541000, P.R. China
| | - Wenjuan Ma
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| |
Collapse
|
46
|
PDE3 Inhibitors Repurposed as Treatments for Age-Related Cognitive Impairment. Mol Neurobiol 2018; 56:4306-4316. [PMID: 30311144 DOI: 10.1007/s12035-018-1374-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 09/27/2018] [Indexed: 12/21/2022]
Abstract
As the population of older individuals grows worldwide, researchers have increasingly focused their attention on identifying key molecular targets of age-related cognitive impairments, with the aim of developing possible therapeutic interventions. Two such molecules are the intracellular cyclic nucleotides, cAMP and cGMP. These second messengers mediate fundamental aspects of brain function relevant to memory, learning, and cognitive function. Consequently, phosphodiesterases (PDEs), which hydrolyze cAMP and cGMP, are promising targets for the development of cognition-enhancing drugs. Inhibitors that target PDEs work by elevating intracellular cAMP. In this review, we provide an overview of different PDE inhibitors, and then we focus on pharmacological and physiological effects of PDE3 inhibitors in the CNS and peripheral tissues. Finally, we discuss findings from experimental and preliminary clinical studies and the potential beneficial effects of the PDE3 inhibitor cilostazol on age-related cognitive impairments. In the innovation pipeline of pharmaceutical development, the antiplatelet agent cilostazol has come into the spotlight as a novel treatment for mild cognitive impairment. Overall, the repurposing of cilostazol may represent a potentially promising way to treat mild cognitive impairment, Alzheimer's disease, and vascular dementia. In this review, we present a brief summary of cAMP signaling and different PDE inhibitors, followed by a discussion of the pharmacological and physiological role of PDE3 inhibitors. In this context, we discuss the repurposing of a PDE3 inhibitor, cilostazol, as a potential treatment for age-related cognitive impairment based on recent research.
Collapse
|
47
|
Wei W, Ji S. Cellular senescence: Molecular mechanisms and pathogenicity. J Cell Physiol 2018; 233:9121-9135. [PMID: 30078211 DOI: 10.1002/jcp.26956] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 06/13/2018] [Indexed: 12/13/2022]
Abstract
Cellular senescence is the arrest of normal cell division. Oncogenic genes and oxidative stress, which cause genomic DNA damage and generation of reactive oxygen species, lead to cellular senescence. The senescence-associated secretory phenotype is a distinct feature of senescence. Senescence is normally involved in the embryonic development. Senescent cells can communicate with immune cells to invoke an immune response. Senescence emerges during the aging process in several tissues and organs. In fact, increasing evidence shows that cellular senescence is implicated in aging-related diseases, such as nonalcoholic fatty liver disease, obesity and diabetes, pulmonary hypertension, and tumorigenesis. Cellular senescence can also be induced by microbial infection. During cellular senescence, several signaling pathways, including those of p53, nuclear factor-κB (NF-κB), mammalian target of rapamycin, and transforming growth factor-beta, play important roles. Accumulation of senescent cells can trigger chronic inflammation, which may contribute to the pathological changes in the elderly. Given the variety of deleterious effects caused by cellular senescence in humans, strategies have been proposed to control senescence. In this review, we will focus on recent studies to provide a brief introduction to cellular senescence, including associated signaling pathways and pathology.
Collapse
Affiliation(s)
- Wenqiang Wei
- Laboratory of Cell Signal Transduction, Basic Medical School, Henan University, Kaifeng, Henan, China.,Department of Microbiology, Basic Medical School, Henan University, Kaifeng, Henan, China
| | - Shaoping Ji
- Laboratory of Cell Signal Transduction, Basic Medical School, Henan University, Kaifeng, Henan, China
| |
Collapse
|
48
|
Shozawa H, Oguchi T, Tsuji M, Yano S, Kiuchi Y, Ono K. Supratherapeutic concentrations of cilostazol inhibits β-amyloid oligomerization in vitro. Neurosci Lett 2018; 677:19-25. [PMID: 29684530 DOI: 10.1016/j.neulet.2018.04.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 04/12/2018] [Accepted: 04/17/2018] [Indexed: 10/17/2022]
Abstract
Alzheimer disease (AD) is the most common type of dementia, and is currently incurable. The efficacy of existing treatments for AD such as acetylcholinesterase inhibitors is limited to symptom improvement. Research on disease-modifying therapies (DMTs) has conventionally focused on amelioration of CNS pathogenesis. Two neuropathological changes correlate strongly with AD, the appearance of neurofibrillary tangles containing the microtubule-associated protein tau and extracellular amyloid deposits containing amyloid β-protein (Aβ). The aggregation of Aβ is believed to be the key pathogenic event in AD, with oligomeric assemblies thought to be the most neurotoxic form. Inhibitors of oligomer formation, therefore, could be valuable therapeutics for AD patients. The clinical phosphodiesterase type-3 inhibitor cilostazol (CSZ) was recently found to suppress the progression of cognitive decline in patients with stable AD receiving acetylcholinesterase inhibitors. Here we examined the effects of CSZ on in vitro aggregations of Aβ1-40 and Aβ1-42 including oligomerization, using the thioflavin T assay, photo-induced cross-linking of unmodified proteins, and electron microscopy. CSZ (25-100 μM) inhibited Aβ aggregation, especially oligomer formation. Considering that CSZ might be a key molecule for DMTs of AD, it cannot be ruled out that the low concentration of CSZ achievable in patient dosing may display some ant-oligomeric activity in synergy with its known therapeutic effects.
Collapse
Affiliation(s)
- Hidenobu Shozawa
- Department of Internal Medicine, Division of Neurology, Showa University School of Medicine, Tokyo, Japan
| | - Tatsunori Oguchi
- Department of Internal Medicine, Division of Neurology, Showa University School of Medicine, Tokyo, Japan
| | - Mayumi Tsuji
- Department of Pharmacology, Showa University School of Medicine, Tokyo, Japan
| | - Satoshi Yano
- Department of Internal Medicine, Division of Neurology, Showa University School of Medicine, Tokyo, Japan
| | - Yuji Kiuchi
- Department of Pharmacology, Showa University School of Medicine, Tokyo, Japan
| | - Kenjiro Ono
- Department of Internal Medicine, Division of Neurology, Showa University School of Medicine, Tokyo, Japan.
| |
Collapse
|