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Braun DJ, Frazier HN, Davis VA, Coleman MJ, Rogers CB, Van Eldik LJ. Early chronic suppression of microglial p38α in a model of Alzheimer's disease does not significantly alter amyloid-associated neuropathology. PLoS One 2023; 18:e0286495. [PMID: 37256881 PMCID: PMC10231773 DOI: 10.1371/journal.pone.0286495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 05/17/2023] [Indexed: 06/02/2023] Open
Abstract
The p38 alpha mitogen-activated protein kinase (p38α) is linked to both innate and adaptive immune responses and is under investigation as a target for drug development in the context of Alzheimer's disease (AD) and other conditions with neuroinflammatory dysfunction. While preclinical data has shown that p38α inhibition can protect against AD-associated neuropathology, the underlying mechanisms are not fully elucidated. Inhibitors of p38α may provide benefit via modulation of microglial-associated neuroinflammatory responses that contribute to AD pathology. The present study tests this hypothesis by knocking out microglial p38α and assessing early-stage pathological changes. Conditional knockout of microglial p38α was accomplished in 5-month-old C57BL/6J wild-type and amyloidogenic AD model (APPswe/PS1dE9) mice using a tamoxifen-inducible Cre/loxP system under control of the Cx3cr1 promoter. Beginning at 7.5 months of age, animals underwent behavioral assessment on the open field, followed by a later radial arm water maze test and collection of cortical and hippocampal tissues at 11 months. Additional endpoint measures included quantification of proinflammatory cytokines, assessment of amyloid burden and plaque deposition, and characterization of microglia-plaque dynamics. Loss of microglial p38α did not alter behavioral outcomes, proinflammatory cytokine levels, or overall amyloid plaque burden. However, this manipulation did significantly increase hippocampal levels of soluble Aβ42 and reduce colocalization of Iba1 and 6E10 in a subset of microglia in close proximity to plaques. The data presented here suggest that rather than reducing inflammation per se, the net effect of microglial p38α inhibition in the context of early AD-type amyloid pathology is a subtle alteration of microglia-plaque interactions. Encouragingly from a therapeutic standpoint, these data suggest no detrimental effect of even substantial decreases in microglial p38α in this context. Additionally, these results support future investigations of microglial p38α signaling at different stages of disease, as well as its relationship to phagocytic processes in this particular cell-type.
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Affiliation(s)
- David J. Braun
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, Kentucky, United States of America
- Department of Neuroscience, University of Kentucky, Lexington, Kentucky, United States of America
| | - Hilaree N. Frazier
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, Kentucky, United States of America
| | - Verda A. Davis
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, Kentucky, United States of America
| | - Meggie J. Coleman
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, Kentucky, United States of America
| | - Colin B. Rogers
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, Kentucky, United States of America
| | - Linda J. Van Eldik
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, Kentucky, United States of America
- Department of Neuroscience, University of Kentucky, Lexington, Kentucky, United States of America
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Denoirjean T, Ameline A, Couty A, Dubois F, Coutte F, Doury G. Effects of surfactins, Bacillus lipopeptides, on the behavior of an aphid and host selection by its parasitoid. PEST MANAGEMENT SCIENCE 2022; 78:929-937. [PMID: 34719104 DOI: 10.1002/ps.6702] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 10/25/2021] [Accepted: 10/30/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Lipopeptides extracted from the Bacillus genus are emerging biopesticides, especially in protecting crops against phytopathogens. Among the three main families of lipopeptides, surfactins have been identified as having insecticidal properties against several insect orders. However, the sublethal effects of these promising biopesticides on insect pests and their natural enemies remain largely unknown. The aim of this study was to evaluate the effects of surfactins topically applied on black bean aphid Aphis fabae mortality. First, the effects of surfactins on aphid mortality were determined by delivering increasing concentrations to adults and nymphs. Second, the sublethal effects of surfactins on locomotor activity and feeding behavior of surviving aphids were evaluated using the electropenetrography method. Finally, the effect of host exposure to surfactins on host selection behavior by Aphidius matricariae parasitoid females was analyzed. RESULTS Four surfactins concentrations were studied (0.5, 1, 2.5 and 5 g L-1 ). There was concentration-dependent mortality in response to surfactins at 24 h after treatment. Surfactins impacted aphid behavior when delivered at 1 g L-1 by inducing a greater locomotor activity and a reduction in feeding activity. By contrast, at the third trophic level, exposure of aphid hosts to surfactins did not affect behaviors leading to host recognition and acceptance by parasitoid females. CONCLUSION This study highlighted the consequences of aphid exposure to surfactins in the context of bottom-up regulation. Although surfactins could directly impact aphid behavior, they had no apparent consequences on the host selection behavior exhibited by parasitoid wasps.
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Affiliation(s)
- Thomas Denoirjean
- UMR CNRS 7058 EDYSAN (Écologie et Dynamique des Systèmes Anthropisés), SFR Condorcet FR CNRS 3417, Université de Picardie Jules Verne, Amiens, France
| | - Arnaud Ameline
- UMR CNRS 7058 EDYSAN (Écologie et Dynamique des Systèmes Anthropisés), SFR Condorcet FR CNRS 3417, Université de Picardie Jules Verne, Amiens, France
| | - Aude Couty
- UMR CNRS 7058 EDYSAN (Écologie et Dynamique des Systèmes Anthropisés), SFR Condorcet FR CNRS 3417, Université de Picardie Jules Verne, Amiens, France
| | - Françoise Dubois
- UMR CNRS 7058 EDYSAN (Écologie et Dynamique des Systèmes Anthropisés), SFR Condorcet FR CNRS 3417, Université de Picardie Jules Verne, Amiens, France
| | - François Coutte
- Université de Lille, UMRt 1158 BioEcoAgro - INRAE, équipe Métabolites secondaires d'origine microbienne, SFR Condorcet FR CNRS 3417, Institut Charles Viollette, Lille, France
| | - Géraldine Doury
- UMR CNRS 7058 EDYSAN (Écologie et Dynamique des Systèmes Anthropisés), SFR Condorcet FR CNRS 3417, Université de Picardie Jules Verne, Amiens, France
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Denoirjean T, Doury G, Poli P, Coutte F, Ameline A. Effects of Bacillus lipopeptides on the survival and behavior of the rosy apple aphid Dysaphis plantaginea. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 226:112840. [PMID: 34619473 DOI: 10.1016/j.ecoenv.2021.112840] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/23/2021] [Accepted: 09/26/2021] [Indexed: 06/13/2023]
Abstract
Within the framework of biocontrol development, several natural lipopeptides produced by Bacillus subtilis show well-documented anti-microbial properties, especially in orchards. However, the number of studies on their putative insecticidal effects remain low despite the growing interest to develop new strategies of orchards pests' control. The rosy apple aphid Dysaphis plantaginea is the major aphid pest causing great leaf damage to apple trees. In this study, we submitted young adult aphids to topical application of three different families of lipopeptides, Plipastatin (Fengycin), Mycosubtilin (Iturin), and Surfactin, either separately or as a ternary mixture. Their aphicidal effects were investigated at 1, 2.5 and 5 g/L, both at 1 h and 24 h after exposure, and their effects on aphid behavior were studied at the 2.5 g/L concentration at 24 h after exposure. When delivered alone, lipopeptides displayed contrasted effects varying from no aphicidal activity for Mycosubtilin to a mortality induced even at low concentrations by Surfactin. Surprisingly, locomotor activity of the surviving aphids was only affected by the two least lethal treatments, Mycosubtilin and the ternary mix. Their feeding behavior was only impacted by Surfactin, the most lethal treatment, that unexpectedly increased phloem sap ingestion. The results are discussed in the context of lipopeptides applicability for integrated pest management.
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Affiliation(s)
- Thomas Denoirjean
- UMR CNRS 7058 EDYSAN (Écologie et Dynamique des Systèmes Anthropisés), SFR Condorcet FR CNRS 3417, Université de Picardie Jules Verne, 33 rue St Leu, F-80039 Amiens Cedex, France
| | - Géraldine Doury
- UMR CNRS 7058 EDYSAN (Écologie et Dynamique des Systèmes Anthropisés), SFR Condorcet FR CNRS 3417, Université de Picardie Jules Verne, 33 rue St Leu, F-80039 Amiens Cedex, France
| | - Pedro Poli
- UMR CNRS 7058 EDYSAN (Écologie et Dynamique des Systèmes Anthropisés), SFR Condorcet FR CNRS 3417, Université de Picardie Jules Verne, 33 rue St Leu, F-80039 Amiens Cedex, France
| | - François Coutte
- Université de Lille, UMRt 1158 BioEcoAgro - INRAE, équipe Métabolites secondaires d'origine microbienne - Institut Charles Viollette, SFR Condorcet FR CNRS 3417, F-59000 Lille, France
| | - Arnaud Ameline
- UMR CNRS 7058 EDYSAN (Écologie et Dynamique des Systèmes Anthropisés), SFR Condorcet FR CNRS 3417, Université de Picardie Jules Verne, 33 rue St Leu, F-80039 Amiens Cedex, France.
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Chen J, Li Q, Zhu J, Yuan Z, Wang T, Song J. GPR40 Agonist Ameliorate Pathological Neuroinflammation of Alzheimer's Disease via the Modulation of Gut Microbiota and Immune System, a Mini-Review. Neurotox Res 2021; 39:2175-2185. [PMID: 34505972 DOI: 10.1007/s12640-021-00408-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/27/2021] [Accepted: 08/30/2021] [Indexed: 02/07/2023]
Abstract
Alzheimer's disease (AD) is a central disease with high incidence, and its pathological process is closely associated with changes of some biological indicators in the periphery. Among them, the intestinal flora mainly causes a series of pathological changes such as inflammation through the immune system, which may contribute to the pathological process of AD. In this paper, we mainly focused the relationship between gut microbiota and immune system disorder in the neuropathology of AD, underlining the significance of the advanced mechanism of inflammatory response and providing a new direction for the treatment of AD.
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Affiliation(s)
- Jianheng Chen
- Department of Anesthesiology, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, China
| | - Qian Li
- Department of Nephrology, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jiang Zhu
- Department of Nephrology, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Zijing Yuan
- Department of Nephrology, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Tao Wang
- Department of Nephrology, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jie Song
- Department of Nephrology, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.
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Wang Y, Tian J, Shi F, Li X, Hu Z, Chu J. Protective effect of surfactin on copper sulfate-induced inflammation, oxidative stress, and hepatic injury in zebrafish. Microbiol Immunol 2021; 65:410-421. [PMID: 34101233 DOI: 10.1111/1348-0421.12924] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 01/31/2023]
Abstract
Surfactin, an antibacterial peptide, produced by various Bacillus subtilis strains, have broad-spectrum antibacterial and immune-enhancing functions. In this study, we investigated the anti-inflammatory, antioxidant, and hepatoprotective effect of surfactin on zebrafish (Danio rerio) larvae following their exposure to copper sulfate (CuSO4 ). The mature AB wild-type and a transgenic line of zebrafish larvae that expressed enhanced GFP (EGFP) named Tg (Lyz:EGFP) were exposed to 0, 20, 40, and 60 μg/mL surfactin after incubation with 3.2 μg/mL CuSO4 for 2 h from 72 h postfertilization (hpf). Different endpoints, such as migration of GFP-labeled neutrophils, analysis of inflammatory cytokines and transaminases, markers of oxidation, expression of certain genes, and histological changes of liver, were studied to evaluate the function of surfactin. The protein expression levels of NF-κBp65, TNF-α, cyclooxygenase-2 (COX-2), and iNOS were determined in murine macrophage RAW 264.7 cells by western blotting. Our results show that surfactin reduced migration of neutrophils and relieved hepatic injury. In addition, surfactin reduced the index levels of inflammatory factors, oxidative stress response, and improved hepatic function. Surfactin also significantly inhibited the expression of IL-1β, IL-8, TNF-α, nitric oxide, NF-κBp65, COX-2, and iNOS, and increased the expression of IL-10. Thus, our results demonstrate that surfactin has anti-inflammatory, antioxidant, and hepatoprotective activities. Surfactin has potential as a novel inflammation and immune adjustment.
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Affiliation(s)
- Ying Wang
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Ji'nan, Shandong, China
| | - Jiahui Tian
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Ji'nan, Shandong, China
| | - Feifei Shi
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Ji'nan, Shandong, China
| | - Xuan Li
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Ji'nan, Shandong, China
| | - Zhuran Hu
- Shandong Bee-lan Biotechnology Co. Ltd., Tai'an, Shandong, China
| | - Jie Chu
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Ji'nan, Shandong, China
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Wei C, Sun Y, Wang J, Lin D, Cui V, Shi H, Wu A. LncRNA NONMMUT055714 acts as the sponge of microRNA-7684-5p to protect against postoperative cognitive dysfunction. Aging (Albany NY) 2021; 13:12552-12564. [PMID: 33902009 PMCID: PMC8148455 DOI: 10.18632/aging.202932] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 01/21/2021] [Indexed: 11/25/2022]
Abstract
Postoperative cognitive dysfunction (POCD) is a neurological complication of surgery especially common in elderly patients. In this study, we investigated the role of NONMMUT055714 in POCD via regulation of miR-7684-5p. In a POCD mouse model, we induced overexpression of NONMUTT055714 via transfection of lentivrus into the hippocampus, and used the Morris water maze for assessment of cognitive function. Silencing of NONMUTT055714 and miR-7684-5p was induced in primary hippocampal neurons to observe the effects of these regulatory RNAs on cellular processes. Bioinformatics analysis and a double luciferase reporter experiment were performed to further explore the relationship between NONMMUT055714, miR-7684-5p, and SORLA. Cell and animal rescue experiments were performed to verify the ability of miR-7684-5p to reverse the protective effects of NONMMUT055714 overexpression in POCD. We observed that NONMMUT055714 has decreased expression in the POCD mouse model. Overexpression of NONMMUT055714 protected against cognitive impairment of the POCD mouse model in vivo. We identified miR-7684-5p as a NONMMUT055714-related miRNA and in turn as an upstream regulator of SORLA. We found that NONMMUT055714 downregulation is associated with decreased SORLA, increased Aβ and p-tau expression, increased inflammatory biomarkers, increased markers of oxidative stress, and increased neuronal apoptosis in vitro. The effects of NONMMUT055714 downregulation were reversed by silencing miR-7684-5p in vitro and in vivo. Taken together, our findings suggest that NONMMUT055714 is protective against the development of POCD via its function as a ceRNA (or miRNA sponge) in the regulation of miR-7684-5p and SORLA. We therefore propose NONMMUT055714 as a novel target for the investigation and prevention of POCD.
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Affiliation(s)
- Changwei Wei
- Department of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Yi Sun
- Department of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Jing Wang
- Department of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Dandan Lin
- Department of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Victoria Cui
- Department of General Surgery, MedStar Georgetown University Hospital, Washington, D.C., USA
| | - Hui Shi
- Department of Clinical Psychology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Anshi Wu
- Department of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
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Théatre A, Hoste ACR, Rigolet A, Benneceur I, Bechet M, Ongena M, Deleu M, Jacques P. Bacillus sp.: A Remarkable Source of Bioactive Lipopeptides. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2021; 181:123-179. [DOI: 10.1007/10_2021_182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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8
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Henríquez G, Gomez A, Guerrero E, Narayan M. Potential Role of Natural Polyphenols against Protein Aggregation Toxicity: In Vitro, In Vivo, and Clinical Studies. ACS Chem Neurosci 2020; 11:2915-2934. [PMID: 32822152 DOI: 10.1021/acschemneuro.0c00381] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
One of the main features of neurodegenerative disorders such as Alzheimer's disease and Parkinson's disease is the amyloidogenic behavior of disease-specific proteins including amyloid β, tau, α-synuclein, and mutant Huntingtin which participate in the formation, accumulation, and deposition of toxic misfolded aggregates. Consequently, these proteins not only associated with the progress of their respective neurodegenerative pathologies but also qualify as disease-specific biomarkers. The aim of using natural polyphenols is to target amyloid-dependent proteopathies by decreasing free radical damage and inhibiting and dissolving amyloid fibrils. We explore the effectiveness of the polyphenols epigallocatechin-3-gallate, oleuropein aglycone, and quercetin on their ability to inhibit aggregation of amyloid β, tau, and α-synuclein and mitigate other pathological features for Alzheimer's disease and Parkinson's disease. The analysis was carried from in vitro and cell line studies to animal models and clinical trials. This Review describes the use of phytochemical compounds as prophylactic agents for Alzheimer's disease, Parkinson's disease, and other proteopathies.
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Affiliation(s)
- Gabriela Henríquez
- Department of Environmental Science and Engineering, the University of Texas at El Paso (UTEP), El Paso, Texas 79968, United States
| | - Alejandra Gomez
- Department of Chemistry and Biochemistry, the University of Texas at El Paso (UTEP), El Paso, Texas 79968, United States
| | - Erick Guerrero
- Department of Chemistry and Biochemistry, the University of Texas at El Paso (UTEP), El Paso, Texas 79968, United States
| | - Mahesh Narayan
- Department of Chemistry and Biochemistry, the University of Texas at El Paso (UTEP), El Paso, Texas 79968, United States
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Anestopoulos I, Kiousi DE, Klavaris A, Maijo M, Serpico A, Suarez A, Sanchez G, Salek K, Chasapi SA, Zompra AA, Galanis A, Spyroulias GA, Gombau L, Euston SR, Pappa A, Panayiotidis MI. Marine-Derived Surface Active Agents: Health-Promoting Properties and Blue Biotechnology-Based Applications. Biomolecules 2020; 10:biom10060885. [PMID: 32526944 PMCID: PMC7355491 DOI: 10.3390/biom10060885] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/21/2020] [Accepted: 06/05/2020] [Indexed: 12/19/2022] Open
Abstract
Surface active agents are characterized for their capacity to adsorb to fluid and solid-water interfaces. They can be classified as surfactants and emulsifiers based on their molecular weight (MW) and properties. Over the years, the chemical surfactant industry has been rapidly increasing to meet consumer demands. Consequently, such a boost has led to the search for more sustainable and biodegradable alternatives, as chemical surfactants are non-biodegradable, thus causing an adverse effect on the environment. To these ends, many microbial and/or marine-derived molecules have been shown to possess various biological properties that could allow manufacturers to make additional health-promoting claims for their products. Our aim, in this review article, is to provide up to date information of critical health-promoting properties of these molecules and their use in blue-based biotechnology (i.e., biotechnology using aquatic organisms) with a focus on food, cosmetic and pharmaceutical/biomedical applications.
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Affiliation(s)
- Ioannis Anestopoulos
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (I.A.); (D.-E.K.); (A.K.); (A.G.)
| | - Despina-Evgenia Kiousi
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (I.A.); (D.-E.K.); (A.K.); (A.G.)
| | - Ariel Klavaris
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (I.A.); (D.-E.K.); (A.K.); (A.G.)
| | - Monica Maijo
- Division of Health & Biomedicine, LEITAT Technological Centre, 08005 Barcelona, Spain; (M.M.); (A.S.); (A.S.); (G.S.); (L.G.)
| | - Annabel Serpico
- Division of Health & Biomedicine, LEITAT Technological Centre, 08005 Barcelona, Spain; (M.M.); (A.S.); (A.S.); (G.S.); (L.G.)
| | - Alba Suarez
- Division of Health & Biomedicine, LEITAT Technological Centre, 08005 Barcelona, Spain; (M.M.); (A.S.); (A.S.); (G.S.); (L.G.)
| | - Guiomar Sanchez
- Division of Health & Biomedicine, LEITAT Technological Centre, 08005 Barcelona, Spain; (M.M.); (A.S.); (A.S.); (G.S.); (L.G.)
| | - Karina Salek
- Institute of Mechanical, Process & Energy Engineering, Heriot Watt University, Edinburgh EH14 4AS, UK; (K.S.); (S.R.E.)
| | - Stylliani A. Chasapi
- Department of Pharmacy, University of Patras, 26504 Patra, Greece; (S.A.C.); (A.A.Z.); (G.A.S.)
| | - Aikaterini A. Zompra
- Department of Pharmacy, University of Patras, 26504 Patra, Greece; (S.A.C.); (A.A.Z.); (G.A.S.)
| | - Alex Galanis
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (I.A.); (D.-E.K.); (A.K.); (A.G.)
| | - Georgios A. Spyroulias
- Department of Pharmacy, University of Patras, 26504 Patra, Greece; (S.A.C.); (A.A.Z.); (G.A.S.)
| | - Lourdes Gombau
- Division of Health & Biomedicine, LEITAT Technological Centre, 08005 Barcelona, Spain; (M.M.); (A.S.); (A.S.); (G.S.); (L.G.)
| | - Stephen R. Euston
- Institute of Mechanical, Process & Energy Engineering, Heriot Watt University, Edinburgh EH14 4AS, UK; (K.S.); (S.R.E.)
| | - Aglaia Pappa
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (I.A.); (D.-E.K.); (A.K.); (A.G.)
- Correspondence: (A.P.); (M.I.P.)
| | - Mihalis I. Panayiotidis
- Department of Applied Sciences, Northumbria University, Newcastle Upon Tyne NE1 8ST, UK
- Department of Electron Microscopy & Molecular Pathology, The Cyprus Institute of Neurology & Genetics, 2371 Nicosia, Cyprus
- The Cyprus School of Molecular Medicine, PO Box 23462, 1683 Nicosia, Cyprus
- Correspondence: (A.P.); (M.I.P.)
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Liu Z, Wang Y, Qin W, Chen D, Feng Y, Su H, Shao W, Zhou B, Bu X. Raloxifene alleviates amyloid-β-induced cytotoxicity in HT22 neuronal cells via inhibiting oligomeric and fibrillar species formation. J Biochem Mol Toxicol 2019; 33:e22395. [PMID: 31583774 DOI: 10.1002/jbt.22395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 07/01/2019] [Accepted: 09/12/2019] [Indexed: 12/22/2022]
Abstract
Raloxifene, a selective estrogen receptor modulator, displays benefits for Alzheimer's disease (AD) prevention in postmenopausal women as hormonal changes during menopause have the potential to influence AD pathogenesis, but the underlying mechanism of its neuroprotection is not entirely clear. In this study, the effects of raloxifene on amyloid-β (Aβ) amyloidogenesis were evaluated. The results demonstrated that raloxifene inhibits Aβ42 aggregation and destabilizes preformed Aβ42 fibrils through directly interacting with the N-terminus and middle domains of Aβ42 peptides. Consequently, raloxifene not only reduces direct toxicity of Aβ42 in HT22 neuronal cells, but also suppresses expressions of tumor necrosis factor-α and transforming growth factor-β induced by Aβ42 peptides, and then alleviates microglia-mediated indirect toxicity of Aβ42 to HT22 neuronal cells. Our results suggested an alternative possible explanation for the neuroprotective activity of raloxifene in AD prevention.
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Affiliation(s)
- Ziyi Liu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Youqiao Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Wenjing Qin
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Daoyuan Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yanqiao Feng
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Hui Su
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Weiyan Shao
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Binhua Zhou
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Xianzhang Bu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
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Cui Y, Wang Y, Zhao D, Feng X, Zhang L, Liu C. Loganin prevents BV-2 microglia cells from Aβ 1-42 -induced inflammation via regulating TLR4/TRAF6/NF-κB axis. Cell Biol Int 2018; 42:1632-1642. [PMID: 30288860 DOI: 10.1002/cbin.11060] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 09/29/2018] [Indexed: 12/14/2022]
Abstract
Neuroinflammation is closely related with the pathogenesis and progress of neurodegenerative diseases including Alzheimer's disease (AD). Loganin, an iridoid glycoside obtained from traditional Chinese medicine Cornus officinalis, has properties of inhibiting inflammation and improving memory. The present study was aimed to investigate effects of loganin on Aβ-induced inflammation and to explore the underlying mechanisms. BV-2 microglia cells were stimulated with 10 µM Aβ1-42 for 24 h to induce inflammatory damage. According to results of CCK-8 assay, the doses of loganin in present work were 10 and 30 µM. We found that treatment with loganin could inhibit Aβ1-42 -induced microglia activation. Furthermore, loganin treatment prevented the over-production of Tumor necrosis factor-α (TNF-α), Interleukin-6 (IL-6), Macrophage Chemotactic Protein 1(MCP-1), Nitric oxide (NO), Prostaglandin E2 (PGE2) and the up-regulation of inducible nitric oxide synthase (iNOS) and Cyclooxygenase 2 (COX-2) in Aβ1-42 -stimulated BV-2 cells. Results from Western blots demonstrated that loganin inhibited Aβ1-42 -induced elevation in Toll-like receptor 4 (TLR4), Myeloid Differentiation Factor 88 (MyD88) and TNF receptor-associated factor 6 (TRAF6). Loganin treatment also attenuated the increased phosphorylation level of IRAK4 caused by Aβ1-42 . Additionally, loganin alleviated nuclear translocation of NF-κB p65 subunit in Aβ1-42 -stimulated BV-2 cells, and this phenomenon could be reversed by TLR4 agonist LPS. Further, the anti-inflammatory effects of loganin were attenuated when TLR4 signaling pathway was re-activated by LPS. Taken together, our data indicated that loganin could attenuate inflammatory response induced by Aβ in BV-2 microglia cells, partially through deactivating the TLR4/TRAF6/NF-κB axis.
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Affiliation(s)
- Yong Cui
- Department of Human Anatomy, School of Basic Medical Sciences, Liaoning University of Traditional Chinese Medicine, Shenyang, 110847, People's Republic of China
| | - Yanjie Wang
- Department of Biochemistry, School of Basic Medical Sciences, Liaoning University of Traditional Chinese Medicine, 79 East Chongshan Road, Shenyang, 110847, People's Republic of China
| | - Danyu Zhao
- Department of Biochemistry, School of Basic Medical Sciences, Liaoning University of Traditional Chinese Medicine, 79 East Chongshan Road, Shenyang, 110847, People's Republic of China
| | - Xiaofan Feng
- Department of Biochemistry, School of Basic Medical Sciences, Liaoning University of Traditional Chinese Medicine, 79 East Chongshan Road, Shenyang, 110847, People's Republic of China
| | - Lin Zhang
- Department of Biochemistry, School of Basic Medical Sciences, Liaoning University of Traditional Chinese Medicine, 79 East Chongshan Road, Shenyang, 110847, People's Republic of China
| | - Chun Liu
- Department of Biochemistry, School of Basic Medical Sciences, Liaoning University of Traditional Chinese Medicine, 79 East Chongshan Road, Shenyang, 110847, People's Republic of China
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12
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Pumilacidins from the Octocoral-Associated Bacillus sp. DT001 Display Anti-Proliferative Effects in Plasmodium falciparum. Molecules 2018; 23:molecules23092179. [PMID: 30158478 PMCID: PMC6225264 DOI: 10.3390/molecules23092179] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 08/24/2018] [Accepted: 08/25/2018] [Indexed: 12/03/2022] Open
Abstract
Chemical examination of the octocoral-associated Bacillus species (sp.) DT001 led to the isolation of pumilacidins A (1) and C (2). We investigated the effect of these compounds on the viability of Plasmodium falciparum and the mechanism of pumilacidin-induced death. The use of inhibitors of protein kinase C (PKC) and phosphoinositide 3-kinase (PI3K) was able to prevent the effects of pumilacidins A and C. The results indicated also that pumilacidins inhibit parasite growth via mitochondrial dysfunction and decreased cytosolic Ca2+.
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Zhao H, Yan L, Xu X, Jiang C, Shi J, Zhang Y, Liu L, Lei S, Shao D, Huang Q. Potential of Bacillus subtilis lipopeptides in anti-cancer I: induction of apoptosis and paraptosis and inhibition of autophagy in K562 cells. AMB Express 2018; 8:78. [PMID: 29777449 PMCID: PMC5959823 DOI: 10.1186/s13568-018-0606-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 04/28/2018] [Indexed: 12/03/2022] Open
Abstract
The lipopeptide iturin from Bacillus subtilis has been found to have a potential inhibitory effect on breast cancer, alveolar adenocarcinoma, renal carcinoma, and colon adenocarcinoma. In this study, the potential of B. subtilis lipopeptides (a mixture of iturin homologues, concentration of 42.75%) to inhibit chronic myelogenous leukemia was evaluated using K562 myelogenous leukemia cells. The results showed that the lipopeptides could completely inhibit the growth of K562 at 100 μM, with an IC50 value of 65.76 μM. The lipopeptides inhibited the profile of K562 via three pathways: (1) induction of paraptosis indicated by the occurrence of cytoplasmic vacuoles, and swelling of the mitochondria and endoplasmic reticulum (ER) without membrane blebbing in the presence of a caspase inhibitor; (2) inhibition of autophagy progress illustrated by the upregulated expression of LCII and P62; and (3) induction of apoptosis by causing ROS burst, and induction of the intrinsic pathway indicated by the upregulated expression of cytochrome c (Cyto-c), bax, and bad, together with downregulated expression of Bcl-2. The ROS-dependent apoptosis and caspase-independent paraptosis were verified using the ROS inhibitor and caspase inhibitor, respectively. The extrinsic apoptosis pathway was not involved in the lipopeptide’s effects on K562. Overall, the B. subtilis lipopeptides (consisting of a majority of iturin) exhibited promising potential in inhibiting chronic myelogenous leukemia in vitro via simultaneously causing paraptosis, apoptosis, and inhibition of autophagy.
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Mao Y, Yu L, Mao M, Ma C, Qu L. Design and study of lipopeptide inhibitors on preventing aggregation of human islet amyloid polypeptide residues 11-20. J Pept Sci 2017; 24. [DOI: 10.1002/psc.3058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 10/17/2017] [Accepted: 10/23/2017] [Indexed: 01/03/2023]
Affiliation(s)
- Yexuan Mao
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Lanlan Yu
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Mengfan Mao
- College of Chemistry; Chongqing Normal University; Chongqing 400047 China
| | - Chuanguo Ma
- National Engineering Laboratory for Wheat & Corn Further Processing; Henan University of Technology; Zhengzhou 450001 China
| | - Lingbo Qu
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 China
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15
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Biological activity of lipopeptides from Bacillus. Appl Microbiol Biotechnol 2017; 101:5951-5960. [PMID: 28685194 DOI: 10.1007/s00253-017-8396-0] [Citation(s) in RCA: 178] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 06/13/2017] [Accepted: 06/15/2017] [Indexed: 12/20/2022]
Abstract
The lipopeptides of Bacillus are small metabolites that contain a cyclic structure formed by 7-10 amino acids (including 2-4 D-amino acids) and a beta-hydroxy fatty acid with 13-19 C atoms. These lipopeptides exhibit a variety of biological activities, including interactions with biofilms, and anti-fungal, anti-inflammatory, anti-tumor, anti-virus, and anti-platelet properties. The multiple activities of lipopeptides have stimulated significant interest in the exploitation of these lipopeptides for use as antibiotics, feed additives, anti-tumor agents, urgent thrombolytic therapeutic agents, and drug delivery systems. Understanding the natural function of these structurally diverse lipopeptides in Bacillus provides insight into microbial regulatory programs and is required for efficient development of more effective products. Currently, there is still insufficient knowledge of the direct target of these lipopeptides, and continued efforts are needed to enhance their biosynthesis efficiency for industrial applications.
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16
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Molecular docking and simulation studies to give insight of surfactin amyloid interaction for destabilizing Alzheimer’s Aβ42 protofibrils. Med Chem Res 2016. [DOI: 10.1007/s00044-016-1594-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Akbar M, Essa MM, Daradkeh G, Abdelmegeed MA, Choi Y, Mahmood L, Song BJ. Mitochondrial dysfunction and cell death in neurodegenerative diseases through nitroxidative stress. Brain Res 2016; 1637:34-55. [PMID: 26883165 PMCID: PMC4821765 DOI: 10.1016/j.brainres.2016.02.016] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 02/02/2016] [Accepted: 02/05/2016] [Indexed: 12/12/2022]
Abstract
Mitochondria are important for providing cellular energy ATP through the oxidative phosphorylation pathway. They are also critical in regulating many cellular functions including the fatty acid oxidation, the metabolism of glutamate and urea, the anti-oxidant defense, and the apoptosis pathway. Mitochondria are an important source of reactive oxygen species leaked from the electron transport chain while they are susceptible to oxidative damage, leading to mitochondrial dysfunction and tissue injury. In fact, impaired mitochondrial function is commonly observed in many types of neurodegenerative diseases, including Alzheimer's disease, Parkinson's disease, Huntington's disease, alcoholic dementia, brain ischemia-reperfusion related injury, and others, although many of these neurological disorders have unique etiological factors. Mitochondrial dysfunction under many pathological conditions is likely to be promoted by increased nitroxidative stress, which can stimulate post-translational modifications (PTMs) of mitochondrial proteins and/or oxidative damage to mitochondrial DNA and lipids. Furthermore, recent studies have demonstrated that various antioxidants, including naturally occurring flavonoids and polyphenols as well as synthetic compounds, can block the formation of reactive oxygen and/or nitrogen species, and thus ultimately prevent the PTMs of many proteins with improved disease conditions. Therefore, the present review is aimed to describe the recent research developments in the molecular mechanisms for mitochondrial dysfunction and tissue injury in neurodegenerative diseases and discuss translational research opportunities.
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Affiliation(s)
- Mohammed Akbar
- Section of Molecular Pharmacology and Toxicology, Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - Musthafa Mohamed Essa
- Department of Food Science and Nutrition, College of Agriculture and Marine Sciences, Sultan Qaboos University, Oman; Ageing and Dementia Research Group, Sultan Qaboos University, Oman
| | - Ghazi Daradkeh
- Department of Food Science and Nutrition, College of Agriculture and Marine Sciences, Sultan Qaboos University, Oman
| | - Mohamed A Abdelmegeed
- Section of Molecular Pharmacology and Toxicology, Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - Youngshim Choi
- Section of Molecular Pharmacology and Toxicology, Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - Lubna Mahmood
- Department of Nutritional Sciences, Qatar University, Qatar
| | - Byoung-Joon Song
- Section of Molecular Pharmacology and Toxicology, Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
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18
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Cheng-Chung Wei J, Huang HC, Chen WJ, Huang CN, Peng CH, Lin CL. Epigallocatechin gallate attenuates amyloid β-induced inflammation and neurotoxicity in EOC 13.31 microglia. Eur J Pharmacol 2015; 770:16-24. [PMID: 26643169 DOI: 10.1016/j.ejphar.2015.11.048] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 09/25/2015] [Accepted: 11/25/2015] [Indexed: 11/29/2022]
Abstract
Microglia are the primary immune cells that contribute to neuroinflammation by releasing various proinflammatory cytokines and neurotoxins in the brain. Microglia-mediated neuroinflammation is one of the key characteristics of Alzheimer's disease (AD). Therefore, inhibitory reagents that prevent microglial activation may be used as potential therapeutic agents for treating AD. Recently, many studies have been performed to determine the bioactivities of green tea polyphenol epigallocatechin-3-gallate (EGCG), an efficient antioxidant that prevents neuroinflammation. However, limited information is available on the effects of EGCG on microglia-mediated neuroinflammation. In this study, we investigated the inhibitory effects of EGCG on amyloid β (Aβ)-induced microglial activation and neurotoxicity. Our results indicated that EGCG significantly suppressed the expression of tumor necrosis factor α (TNFα), interleukin-1β, interleukin-6, and inducible nitric oxide synthase (iNOS) in Aβ-stimulated EOC 13.31 microglia. EGCG also restored the levels of intracellular antioxidants nuclear erythroid-2 related factor 2 (Nrf2) and heme oxygenase-1 (HO-1), thus inhibiting reactive oxygen species-induced nuclear factor-κB (NF-κB) activation after Aβ treatment. Furthermore, EGCG effectively protected neuro-2a neuronal cells from Aβ-mediated, microglia-induced cytotoxicity by inhibiting mitogen-activated protein kinase-dependent, Aβ-induced release of TNFα. Taken together, our findings suggested that EGCG suppressed Aβ-induced neuroinflammatory response of microglia and protected against indirect neurotoxicity. These results suggest that EGCG is a possible therapeutic agent for preventing Aβ-induced inflammatory neurodegeneration.
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Affiliation(s)
- James Cheng-Chung Wei
- Division of Allergy, Immunology and Rheumatology, Chung Shan Medical University Hospital, Taichung, Taiwan; Institute of Integrative Medicine, China Medical University, Taichung, Taiwan; Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Hsiu-Chen Huang
- Department of Applied Science, National Hsinchu University of Education, Hsinchu, Taiwan
| | - Wei-Jen Chen
- Department of Biomedical Sciences, Chung Shan Medical University, Taichung, Taiwan
| | - Chien-Ning Huang
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Chiung-Huei Peng
- Division of Basic Medical Science, Hungkuang University, Taichung, Taiwan
| | - Chih-Li Lin
- Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan; Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
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Gang H, Liu J, Mu B. Binding structure and kinetics of surfactin monolayer formed at the air/water interface to counterions: A molecular dynamics simulation study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:1955-62. [DOI: 10.1016/j.bbamem.2015.05.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Revised: 05/09/2015] [Accepted: 05/19/2015] [Indexed: 10/23/2022]
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20
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Bai Y, Zhu Z, Gao Z, Kong Y. TLR2 signaling directs NO-dependent MMP-9 induction in mouse microglia. Neurosci Lett 2014; 571:5-10. [DOI: 10.1016/j.neulet.2014.04.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 04/11/2014] [Accepted: 04/18/2014] [Indexed: 11/26/2022]
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21
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Cacabelos R, Cacabelos P, Torrellas C, Tellado I, Carril JC. Pharmacogenomics of Alzheimer's disease: novel therapeutic strategies for drug development. Methods Mol Biol 2014; 1175:323-556. [PMID: 25150875 DOI: 10.1007/978-1-4939-0956-8_13] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Alzheimer's disease (AD) is a major problem of health and disability, with a relevant economic impact on our society. Despite important advances in pathogenesis, diagnosis, and treatment, its primary causes still remain elusive, accurate biomarkers are not well characterized, and the available pharmacological treatments are not cost-effective. As a complex disorder, AD is a polygenic and multifactorial clinical entity in which hundreds of defective genes distributed across the human genome may contribute to its pathogenesis. Diverse environmental factors, cerebrovascular dysfunction, and epigenetic phenomena, together with structural and functional genomic dysfunctions, lead to amyloid deposition, neurofibrillary tangle formation, and premature neuronal death, the major neuropathological hallmarks of AD. Future perspectives for the global management of AD predict that genomics and proteomics may help in the search for reliable biomarkers. In practical terms, the therapeutic response to conventional drugs (cholinesterase inhibitors, multifactorial strategies) is genotype-specific. Genomic factors potentially involved in AD pharmacogenomics include at least five categories of gene clusters: (1) genes associated with disease pathogenesis; (2) genes associated with the mechanism of action of drugs; (3) genes associated with drug metabolism (phase I and II reactions); (4) genes associated with drug transporters; and (5) pleiotropic genes involved in multifaceted cascades and metabolic reactions. The implementation of pharmacogenomic strategies will contribute to optimize drug development and therapeutics in AD and related disorders.
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Affiliation(s)
- Ramón Cacabelos
- Chair of Genomic Medicine, Camilo José Cela University, 28692, Villanueva de la Cañada, Madrid, Spain,
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