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Neuritin-overexpressing transgenic mice demonstrate enhanced neuroregeneration capacity and improved spatial learning and memory recovery after ischemia-reperfusion injury. Aging (Albany NY) 2020; 13:2681-2699. [PMID: 33323541 PMCID: PMC7880330 DOI: 10.18632/aging.202318] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 10/01/2020] [Indexed: 02/01/2023]
Abstract
Acute ischemia-reperfusion (IR)-induced brain injury is further exacerbated by a series of slower secondary pathogenic events, including delayed apoptosis due to neurotrophic factor deficiency. Neuritin, a neurotrophic factor regulating nervous system development and plasticity, is a potential therapeutic target for treatment of IR injury. In this study, Neuritin-overexpressing transgenic (Tg) mice were produced by pronuclear injection and offspring with high overexpression used to generate a line with stable inheritance for testing the neuroprotective capacity of Neuritin against transient global ischemia (TGI). Compared to wild-type mice, transgenic mice demonstrated reduced degradation of the DNA repair factor poly [ADP-ribose] polymerase 1 (PARP 1) in the hippocampus, indicating decreased hippocampal apoptosis rate, and a greater number of surviving hippocampal neurons during the first week post-TGI. In addition, Tg mice showed increased expression of the regeneration markers NF-200, synaptophysin, and GAP-43, and improved recovery of spatial learning and memory. Our findings exhibited that the window of opportunity of neural recovery in Neuritin transgenic mice group had a tendency to move ahead after TGI, which indicated that Neuritin can be used as a potential new therapeutic strategy for improving the outcome of cerebral ischemia injury.
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2
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Cell-seeded porous silk fibroin scaffolds promotes axonal regeneration and myelination in spinal cord injury rats. Biochem Biophys Res Commun 2019; 514:273-279. [DOI: 10.1016/j.bbrc.2019.04.137] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Accepted: 04/18/2019] [Indexed: 12/26/2022]
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3
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Gao R, Li X, Xi S, Wang H, Zhang H, Zhu J, Shan L, Song X, Luo X, Yang L, Huang J. Exogenous Neuritin Promotes Nerve Regeneration After Acute Spinal Cord Injury in Rats. Hum Gene Ther 2016; 27:544-54. [DOI: 10.1089/hum.2015.159] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Rui Gao
- The Key Laboratory of Xinjiang Endemic & Ethnic Diseases and Department of Biochemistry, Shihezi University School of Medicine, Shihezi, Xinjiang, China
| | - Xingyi Li
- The Key Laboratory of Xinjiang Endemic & Ethnic Diseases and Department of Biochemistry, Shihezi University School of Medicine, Shihezi, Xinjiang, China
| | - Shaosong Xi
- The Key Laboratory of Xinjiang Endemic & Ethnic Diseases and Department of Biochemistry, Shihezi University School of Medicine, Shihezi, Xinjiang, China
| | - Haiyan Wang
- The Key Laboratory of Xinjiang Endemic & Ethnic Diseases and Department of Biochemistry, Shihezi University School of Medicine, Shihezi, Xinjiang, China
| | - Hong Zhang
- The Key Laboratory of Xinjiang Endemic & Ethnic Diseases and Department of Biochemistry, Shihezi University School of Medicine, Shihezi, Xinjiang, China
| | - Jingling Zhu
- The Key Laboratory of Xinjiang Endemic & Ethnic Diseases and Department of Biochemistry, Shihezi University School of Medicine, Shihezi, Xinjiang, China
| | - Liya Shan
- The Key Laboratory of Xinjiang Endemic & Ethnic Diseases and Department of Biochemistry, Shihezi University School of Medicine, Shihezi, Xinjiang, China
| | - Xiaoming Song
- School of Medicine & Health Management, Hangzhou Normal University, Hangzhou, Zhejiang, China
| | - Xing Luo
- The Key Laboratory of Xinjiang Endemic & Ethnic Diseases and Department of Biochemistry, Shihezi University School of Medicine, Shihezi, Xinjiang, China
| | - Lei Yang
- School of Medicine & Health Management, Hangzhou Normal University, Hangzhou, Zhejiang, China
| | - Jin Huang
- The Key Laboratory of Xinjiang Endemic & Ethnic Diseases and Department of Biochemistry, Shihezi University School of Medicine, Shihezi, Xinjiang, China
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4
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Galat A. Functional diversity and pharmacological profiles of the FKBPs and their complexes with small natural ligands. Cell Mol Life Sci 2013; 70:3243-75. [PMID: 23224428 PMCID: PMC11113493 DOI: 10.1007/s00018-012-1206-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 10/24/2012] [Accepted: 10/25/2012] [Indexed: 12/25/2022]
Abstract
From 5 to 12 FK506-binding proteins (FKBPs) are encoded in the genomes of disparate marine organisms, which appeared at the dawn of evolutionary events giving rise to primordial multicellular organisms with elaborated internal body plan. Fifteen FKBPs, several FKBP-like proteins and some splicing variants of them are expressed in humans. Human FKBP12 and some of its paralogues bind to different macrocyclic antibiotics such as FK506 or rapamycin and their derivatives. FKBP12/(macrocyclic antibiotic) complexes induce diverse pharmacological activities such as immunosuppression in humans, anticancerous actions and as sustainers of quiescence in certain organisms. Since the FKBPs bind to various assemblies of proteins and other intracellular components, their complexes with the immunosuppressive drugs may differentially perturb miscellaneous cellular functions. Sequence-structure relationships and pharmacological profiles of diverse FKBPs and their involvement in crucial intracellular signalization pathways and modulation of cryptic intercellular communication networks were discussed.
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Affiliation(s)
- Andrzej Galat
- Commissariat à l'Energie Atomique, Direction des Sciences du Vivant, Institut de Biologie et de Technologies de Saclay, Service d'Ingénierie Moléculaire des Protéines, Bat. 152, 91191, Gif-sur-Yvette Cedex, France.
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Xuan W, Murphy E, Beeckman T, Audenaert D, De Smet I. Synthetic molecules: helping to unravel plant signal transduction. J Chem Biol 2013; 6:43-50. [PMID: 24432124 DOI: 10.1007/s12154-013-0091-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Accepted: 02/05/2013] [Indexed: 11/30/2022] Open
Abstract
The application of small molecules has played a crucial role in identifying novel components involved in plant signalling. Compared to classic genetic approaches, small molecule screens offer notable advantages in dissecting plant biological processes, such as technical simplicity, low start-up costs, and most importantly, bypassing the problems of lethality and redundancy. To identify small molecules that target a biological process or protein of interest, robust and well-reasoned high-throughput screening approaches are essential. In this review, we present a series of principles and valuable approaches in small molecule screening in the plant model system Arabidopsis thaliana. We also provide an overview of small molecules that led to breakthroughs in uncovering phytohormone signalling pathways, endomembrane signalling cascades, novel growth regulators, and plant defence mechanisms. Meanwhile, the strategies to deciphering the mechanisms of these small molecules on Arabidopsis are highlighted. Moreover, the opportunities and challenges of small molecule applications in translational biology are discussed.
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Affiliation(s)
- Wei Xuan
- Department of Plant Systems Biology, VIB, Technologiepark 927, B-9052 Ghent, Belgium ; Department of Plant Biotechnology and Genetics, Ghent University, Technologiepark 927, B-9052 Ghent, Belgium
| | - Evan Murphy
- Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, Loughborough, LE12 5RD UK
| | - Tom Beeckman
- Department of Plant Systems Biology, VIB, Technologiepark 927, B-9052 Ghent, Belgium ; Department of Plant Biotechnology and Genetics, Ghent University, Technologiepark 927, B-9052 Ghent, Belgium
| | - Dominique Audenaert
- Compound Screening Facility, VIB, Technologiepark 927, B-9052 Ghent, Belgium
| | - Ive De Smet
- Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, Loughborough, LE12 5RD UK ; Centre for Plant Integrative Biology, University of Nottingham, Nottingham, LE12 5RD UK
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6
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Quist AP, Oscarsson S. Micropatterned surfaces: techniques and applications in cell biology. Expert Opin Drug Discov 2012; 5:569-81. [PMID: 22823168 DOI: 10.1517/17460441.2010.489606] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
IMPORTANCE OF THE FIELD Engineering of cell culture substrates provides a unique opportunity for precise control of the cellular microenvironment with both spatial as well as temporal resolutions. This greatly enhances studies of cell-cell, cell-matrix and cell-factor interaction studies in vitro. AREAS COVERED IN THIS REVIEW The technologies used for micropatterning in the biological field over the last decade and new applications in the last few years for dynamic control of surfaces, tissue engineering, drug discovery, cell-cell interactions and stem cell studies are presented. WHAT THE READER WILL GAIN The reader will gain knowledge on the state of the art in micropatterning and its wide ranging applications in cell patterning, with new pathways to control the cell environment. TAKE HOME MESSAGE Micropatterning of cells has been studied and developed enough to be widely applied ranging from single cell assays to tissue engineering. Techniques have evolved from many-step processes to direct writing of biologically selective patterns.
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Affiliation(s)
- Arjan P Quist
- Richmond Chemical Corp., 2210 Midwest Rd Ste 100, Oak Brook IL 60523, USA +1 630 5722500 ; +1 630 5722522 ;
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7
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Abou-Gharbia M, Childers W. Targeting neurodegenerative diseases: Drug discovery in a challenging arena. PURE APPL CHEM 2012. [DOI: 10.1351/pac-con-11-11-09] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Neurodegenerative diseases represent one of the health care community’s truly unmet medical needs. They can be loosely classified into two categories, acute and chronic. One of the best known chronic neurodegenerative diseases, Alzheimer’s disease, represents a serious health care problem that may well exceed the limits of current fiscal and care giver resources. No disease-modifying therapeutic agents have been identified, and the few available symptomatic treatments possess limitations in their duration of action and side effects. Despite decades of drug discovery research and numerous clinical trials, no truly effective treatment for stroke, the most prevalent acute neurodegenerative disease, has been identified. This article summarizes two recent drug discovery projects, one targeting Alzheimer’s disease and the other targeting ischemic stroke. Both projects involved design, synthesis, and biological evaluation of a novel series of heterocyclic derivatives.
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Affiliation(s)
- Magid Abou-Gharbia
- 1Moulder Center for Drug Discovery Research, School of Pharmacy, Temple University, 3307 North Broad Street, Philadelphia, PA 18938, USA
| | - Wayne Childers
- 1Moulder Center for Drug Discovery Research, School of Pharmacy, Temple University, 3307 North Broad Street, Philadelphia, PA 18938, USA
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Toll EC, Seifalian AM, Birchall MA. The role of immunophilin ligands in nerve regeneration. Regen Med 2012; 6:635-52. [PMID: 21916598 DOI: 10.2217/rme.11.43] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Tacrolimus (FK506) is a widely used immunosuppressant in organ transplantation. However, it also has neurotrophic activity that occurs independently of its immunosuppressive effects. Other neurotrophic immunophilin ligands that do not exhibit immunosuppression have subsequently been developed and studied in various models of nerve injury. This article reviews the literature on the use of tacrolimus and other immunophilin ligands in peripheral nerve, cranial nerve and spinal cord injuries. The most convincing evidence of enhanced nerve regeneration is seen with systemic administration of tacrolimus in peripheral nerve injury, although clinical use is limited due to its immunosuppressive side effects. Local tacrolimus delivery to the site of nerve repair in peripheral and cranial nerve injury is less effective but requires further investigation. Tacrolimus can enhance outcomes in nerve allograft reconstruction and accelerates reinnervation of complex functional allograft transplants. Other non-immunosuppressive immunophilins ligands such as V-10367 and FK1706 demonstrate enhanced neuroregeneration in the peripheral nervous system and CNS. Mixed results are found in the application of immunophilin ligands to treat spinal cord injury. Immunophilin ligands have great potential in the treatment of nerve injury, but further preclinical studies are necessary to permit translation into clinical trials.
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Affiliation(s)
- Edward C Toll
- Division of Surgery and Interventional Science, University College London, UK.
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9
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Deleersnijder A, Van Rompuy AS, Desender L, Pottel H, Buée L, Debyser Z, Baekelandt V, Gerard M. Comparative analysis of different peptidyl-prolyl isomerases reveals FK506-binding protein 12 as the most potent enhancer of alpha-synuclein aggregation. J Biol Chem 2011; 286:26687-701. [PMID: 21652707 PMCID: PMC3143632 DOI: 10.1074/jbc.m110.182303] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2010] [Revised: 05/28/2011] [Indexed: 11/06/2022] Open
Abstract
FK506-binding proteins (FKBPs) are members of the immunophilins, enzymes that assist protein folding with their peptidyl-prolyl isomerase (PPIase) activity. Some non-immunosuppressive inhibitors of these enzymes have neuroregenerative and neuroprotective properties with an unknown mechanism of action. We have previously shown that FKBPs accelerate the aggregation of α-synuclein (α-SYN) in vitro and in a neuronal cell culture model for synucleinopathy. In this study we investigated whether acceleration of α-SYN aggregation is specific for the FKBP or even the PPIase family. Therefore, we studied the effect of several physiologically relevant PPIases, namely FKBP12, FKBP38, FKBP52, FKBP65, Pin1, and cyclophilin A, on α-SYN aggregation in vitro and in neuronal cell culture. Among all PPIases tested in vitro, FKBP12 accelerated α-SYN aggregation the most. Furthermore, only FKBP12 accelerated α-SYN fibril formation at subnanomolar concentrations, pointing toward an enzymatic effect. Although stable overexpression of various FKBPs enhanced the aggregation of α-SYN and cell death in cell culture, they were less potent than FKBP12. When FKBP38, FKBP52, and FKBP65 were overexpressed in a stable FKBP12 knockdown cell line, they could not fully restore the number of α-SYN inclusion-positive cells. Both in vitro and cell culture data provide strong evidence that FKBP12 is the most important PPIase modulating α-SYN aggregation and validate the protein as an interesting drug target for Parkinson disease.
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Affiliation(s)
- Angélique Deleersnijder
- From the Laboratory of Biochemistry and
- Laboratory for Neurobiology and Gene Therapy, K. U. Leuven, Kapucijnenvoer 33, B-3000 Leuven, Flanders, Belgium
| | - Anne-Sophie Van Rompuy
- Laboratory for Neurobiology and Gene Therapy, K. U. Leuven, Kapucijnenvoer 33, B-3000 Leuven, Flanders, Belgium
| | | | - Hans Pottel
- the Laboratory of Biophysics, K. U. Leuven-Kortrijk, Etienne Sabbelaan 53, B-8500 Kortrijk, Flanders, Belgium
| | - Luc Buée
- INSERM, U837, rue Polonovski, F-59000 Lille, France
- Université Lille-Nord de France, UDSL, Faculté de Médecine, Institut de Médecine Prédictive et Recherche Thérapeutique, Université Lille 2, Place de Verdun, F-59045 Lille, France, and
- CHRU, F-59037 Lille Cedex, France
| | - Zeger Debyser
- From the Laboratory of Biochemistry and
- the Laboratory for Molecular Virology and Gene Therapy and
| | - Veerle Baekelandt
- Laboratory for Neurobiology and Gene Therapy, K. U. Leuven, Kapucijnenvoer 33, B-3000 Leuven, Flanders, Belgium
| | - Melanie Gerard
- From the Laboratory of Biochemistry and
- Laboratory for Neurobiology and Gene Therapy, K. U. Leuven, Kapucijnenvoer 33, B-3000 Leuven, Flanders, Belgium
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10
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Latanoprost Promotes Neurite Outgrowth in Differentiated RGC-5 Cells via the PI3K-Akt-mTOR Signaling Pathway. Cell Mol Neurobiol 2011; 31:597-604. [DOI: 10.1007/s10571-011-9653-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Accepted: 01/12/2011] [Indexed: 12/21/2022]
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11
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Frimat JP, Sisnaiske J, Subbiah S, Menne H, Godoy P, Lampen P, Leist M, Franzke J, Hengstler JG, van Thriel C, West J. The network formation assay: a spatially standardized neurite outgrowth analytical display for neurotoxicity screening. LAB ON A CHIP 2010; 10:701-709. [PMID: 20221557 DOI: 10.1039/b922193j] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We present a rapid, reproducible and sensitive neurotoxicity testing platform that combines the benefits of neurite outgrowth analysis with cell patterning. This approach involves patterning neuronal cells within a hexagonal array to standardize the distance between neighbouring cellular nodes, and thereby standardize the length of the neurite interconnections. This feature coupled with defined assay coordinates provides a streamlined display for rapid and sensitive analysis. We have termed this the network formation assay (NFA). To demonstrate the assay we have used a novel cell patterning technique involving thin film poly(dimethylsiloxane) (PDMS) microcontact printing. Differentiated human SH-SY5Y neuroblastoma cells colonized the array with high efficiency, reliably producing pattern occupancies above 70%. The neuronal array surface supported neurite outgrowth, resulting in the formation of an interconnected neuronal network. Exposure to acrylamide, a neurotoxic reference compound, inhibited network formation. A dose-response curve from the NFA was used to determine a 20% network inhibition (NI(20)) value of 260 microM. This concentration was approximately 10-fold lower than the value produced by a routine cell viability assay, and demonstrates that the NFA can distinguish network formation inhibitory effects from gross cytotoxic effects. Inhibition of the mitogen-activated protein kinase (MAPK) ERK1/2 and phosphoinositide-3-kinase (PI-3K) signaling pathways also produced a dose-dependent reduction in network formation at non-cytotoxic concentrations. To further refine the assay a simulation was developed to manage the impact of pattern occupancy variations on network formation probability. Together these developments and demonstrations highlight the potential of the NFA to meet the demands of high-throughput applications in neurotoxicology and neurodevelopmental biology.
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Affiliation(s)
- Jean-Philippe Frimat
- ISAS-Institute for Analytical Sciences, Otto-Hahn-Str. 6b, D-44227, Dortmund, Germany
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12
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Inhibition of FK506 binding proteins reduces alpha-synuclein aggregation and Parkinson's disease-like pathology. J Neurosci 2010; 30:2454-63. [PMID: 20164329 DOI: 10.1523/jneurosci.5983-09.2010] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
alpha-Synuclein (alpha-SYN) is a key player in the pathogenesis of Parkinson's disease (PD). In pathological conditions, the protein is present in a fibrillar, aggregated form inside cytoplasmic inclusions called Lewy bodies. Members of the FK506 binding protein (FKBP) family are peptidyl-prolyl isomerases that were shown recently to accelerate the aggregation of alpha-SYN in vitro. We now established a neuronal cell culture model for synucleinopathy based on oxidative stress-induced alpha-SYN aggregation and apoptosis. Using high-content analysis, we examined the role of FKBPs in aggregation and apoptotic cell death. FK506, a specific inhibitor of this family of proteins, inhibited alpha-SYN aggregation and neuronal cell death in this synucleinopathy model dose dependently. Knockdown of FKBP12 or FKBP52 reduced the number of alpha-SYN aggregates and protected against cell death, whereas overexpression of FKBP12 or FKBP52 accelerated both aggregation of alpha-SYN and cell death. Thus, FK506 likely targets FKBP members in the cell culture model. Furthermore, oral administration of FK506 after viral vector-mediated overexpression of alpha-SYN in adult mouse brain significantly reduced alpha-SYN aggregate formation and neuronal cell death. Our data explain previously described neuroregenerative and neuroprotective effects of immunophilin ligands and validate FKBPs as a novel drug target for the causative treatment of PD.
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Radio NM, Freudenrich TM, Robinette BL, Crofton KM, Mundy WR. Comparison of PC12 and cerebellar granule cell cultures for evaluating neurite outgrowth using high content analysis. Neurotoxicol Teratol 2010; 32:25-35. [DOI: 10.1016/j.ntt.2009.06.003] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2009] [Revised: 05/21/2009] [Accepted: 06/08/2009] [Indexed: 01/21/2023]
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14
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Zock JM. Applications of high content screening in life science research. Comb Chem High Throughput Screen 2009; 12:870-76. [PMID: 19938341 PMCID: PMC2841426 DOI: 10.2174/138620709789383277] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2008] [Revised: 08/05/2008] [Accepted: 09/03/2008] [Indexed: 12/18/2022]
Abstract
Over the last decade, imaging as a detection mode for cell based assays has opened a new world of opportunities to measure "phenotypic endpoints" in both current and developing biological models. These "high content" methods combine multiple measurements of cell physiology, whether it comes from sub-cellular compartments, multicellular structures, or model organisms. The resulting multifaceted data can be used to derive new insights into complex phenomena from cell differentiation to compound pharmacology and toxicity. Exploring the major application areas through review of the growing compendium of literature provides evidence that this technology is having a tangible impact on drug discovery and the life sciences.
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Affiliation(s)
- Joseph M Zock
- Thermo Fisher Scientific, 100 Technology Dr, Pittsburgh, PA 15219, USA.
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15
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Kim YT, Karthikeyan K, Chirvi S, Davé DP. Neuro-optical microfluidic platform to study injury and regeneration of single axons. LAB ON A CHIP 2009; 9:2576-2581. [PMID: 19680581 DOI: 10.1039/b903720a] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We describe a neuro-optical microfluidic platform for studying injury and subsequent regeneration of individual mammalian axons. This platform consists of three components integrated on an inverted microscope, which include a compartmentalized neuronal culture microfluidic device, a femtosecond laser to enable precise axotomy, and a custom built mini cell culture incubator for continuous long term observation of post injury events. We demonstrate the unique capabilities of the platform by injuring individual central and peripheral nervous system axons and monitoring the post injury sequence of events from initial degeneration to subsequent regeneration. This platform will enable study and understanding of neuronal response to injury that is currently not possible with conventional cell culture platform and tools.
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Affiliation(s)
- Young-tae Kim
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA.
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Wang J, Ren L, Li L, Liu W, Zhou J, Yu W, Tong D, Chen S. Microfluidics: a new cosset for neurobiology. LAB ON A CHIP 2009; 9:644-52. [PMID: 19224012 DOI: 10.1039/b813495b] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Recently, microfluidic systems have shown great potential in the study of molecular and cellular biology. With its excellent properties, such as miniaturization, integration and automation, to name just a few, microfluidics creates new opportunities for the spatial and temporal control of cell growth and environmental stimuli in vitro. In the field of neuroscience, microfluidic devices offer precise control of the microenvironment surrounding individual cells, and the delivery of biochemical or physical cues to neural networks or single neurons. The intent of this review is to outline recent advances in microfluidic-based applications in neurobiology, with emphasis on neuron culture, neuron manipulation, neural stem cell differentiation, neuropharmacology, neuroelectrophysiology, and neuron biosensors. It also aims to stimulate development of microfluidic-based applications in neurobiology by involving scientists from various disciplines, especially neurobiology and microtechnology.
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Affiliation(s)
- Jinyi Wang
- College of Animal Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China.
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17
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Graziani EI. Recent advances in the chemistry, biosynthesis and pharmacology of rapamycin analogs. Nat Prod Rep 2009; 26:602-9. [DOI: 10.1039/b804602f] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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18
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The development of stroke therapeutics: promising mechanisms and translational challenges. Neuropharmacology 2008; 56:329-41. [PMID: 19007799 DOI: 10.1016/j.neuropharm.2008.10.006] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2008] [Revised: 09/29/2008] [Accepted: 10/06/2008] [Indexed: 12/13/2022]
Abstract
Ischemic stroke is the second most common cause of death worldwide and a major cause of disability. Intravenous thrombolysis with rt-PA remains the only available acute therapy in patients who present within 3h of stroke onset other than the recently approved mechanical MERCI device, substantiating the high unmet need in available stroke therapeutics. The development of successful therapeutic strategies remains challenging, as evidenced by the continued failures of new therapies in clinical trials. However, significant lessons have been learned and this knowledge is currently being incorporated into improved pre-clinical and clinical design. Furthermore, advancements in imaging technologies and continued progress in understanding biological pathways have established a prolonged presence of salvageable penumbral brain tissue and have begun to elucidate the natural repair response initiated by ischemic insult. We review important past and current approaches to drug development with an emphasis on implementing principles of translational research to achieve a rigorous conversion of knowledge from bench to bedside. We highlight current strategies to protect and repair brain tissue with the promise to provide longer therapeutic windows, preservation of multiple tissue compartments and improved clinical success.
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19
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Radio NM, Mundy WR. Developmental neurotoxicity testing in vitro: models for assessing chemical effects on neurite outgrowth. Neurotoxicology 2008; 29:361-76. [PMID: 18403021 DOI: 10.1016/j.neuro.2008.02.011] [Citation(s) in RCA: 175] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2007] [Revised: 02/13/2008] [Accepted: 02/20/2008] [Indexed: 11/15/2022]
Abstract
In vitro models may be useful for the rapid toxicological screening of large numbers of chemicals for their potential to produce toxicity. Such screening could facilitate prioritization of resources needed for in vivo toxicity testing towards those chemicals most likely to result in adverse health effects. Cell cultures derived from nervous system tissue have proven to be powerful tools for elucidating cellular and molecular mechanisms of nervous system development and function, and have been used to understand the mechanism of action of neurotoxic chemicals. Recently, it has been suggested that in vitro models could be used to screen for chemical effects on critical cellular events of neurodevelopment, including differentiation and neurite growth. This review examines the use of neuronal cell cultures as an in vitro model of neurite outgrowth. Examples of the cell culture systems that are commonly used to examine the effects of chemicals on neurite outgrowth are provided, along with a description of the methods used to quantify this neurodevelopmental process in vitro. Issues relating to the relevance of the methods and models currently used to assess neurite outgrowth are discussed in the context of hazard identification and chemical screening. To demonstrate the utility of in vitro models of neurite outgrowth for the evaluation of large numbers of chemicals, efforts should be made to: (1) develop a set of reference chemicals that can be used as positive and negative controls for comparing neurite outgrowth between model systems, (2) focus on cell cultures of human origin, with emphasis on the emerging area of neural progenitor cells, and (3) use high-throughput methods to quantify endpoints of neurite outgrowth.
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Affiliation(s)
- Nicholas M Radio
- Neurotoxicology Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, US Environmental Protections Agency (USEPA), B105-06 Research Triangle Park, NC 27711, USA
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