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Bulgart HR, Madalena KM, Mital R, McElhanon KE, Kwiatkowski TA, Rose AL, Lerch JK, Lopez Perez MA, Paleo BJ, Weisleder NL. Enhancing Membrane Repair in Neuronal Cell Types as a Potential Therapeutic for Neurodegenerative Diseases. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r4564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Rohan Mital
- NeuroscienceThe Ohio State UniversityColumbusOH
| | | | | | - Aubrey L. Rose
- Physiology and Cell BiologyThe Ohio State UniversityColumbusOH
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Paleo BJ, Madalena KM, Mital R, McElhanon KE, Kwiatkowski TA, Rose AL, Lerch JK, Weisleder N. Enhancing membrane repair increases regeneration in a sciatic injury model. PLoS One 2020; 15:e0231194. [PMID: 32271817 PMCID: PMC7145019 DOI: 10.1371/journal.pone.0231194] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/18/2020] [Indexed: 12/26/2022] Open
Abstract
Various injuries to the neural tissues can cause irreversible damage to multiple functions of the nervous system ranging from motor control to cognitive function. The limited treatment options available for patients have led to extensive interest in studying the mechanisms of neuronal regeneration and recovery from injury. Since many neurons are terminally differentiated, by increasing cell survival following injury it may be possible to minimize the impact of these injuries and provide translational potential for treatment of neuronal diseases. While several cell types are known to survive injury through plasma membrane repair mechanisms, there has been little investigation of membrane repair in neurons and even fewer efforts to target membrane repair as a therapy in neurons. Studies from our laboratory group and others demonstrated that mitsugumin 53 (MG53), a muscle-enriched tripartite motif (TRIM) family protein also known as TRIM72, is an essential component of the cell membrane repair machinery in skeletal muscle. Interestingly, recombinant human MG53 (rhMG53) can be applied exogenously to increase membrane repair capacity both in vitro and in vivo. Increasing the membrane repair capacity of neurons could potentially minimize the death of these cells and affect the progression of various neuronal diseases. In this study we assess the therapeutic potential of rhMG53 to increase membrane repair in cultured neurons and in an in vivo mouse model of neurotrauma. We found that a robust repair response exists in various neuronal cells and that rhMG53 can increase neuronal membrane repair both in vitro and in vivo. These findings provide direct evidence of conserved membrane repair responses in neurons and that these repair mechanisms can be targeted as a potential therapeutic approach for neuronal injury.
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Affiliation(s)
- Brian J. Paleo
- Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, United States of America
| | - Kathryn M. Madalena
- Department of Neuroscience, The Ohio State University, Columbus, Ohio, United States of America
| | - Rohan Mital
- Department of Neuroscience, The Ohio State University, Columbus, Ohio, United States of America
| | - Kevin E. McElhanon
- Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, United States of America
| | - Thomas A. Kwiatkowski
- Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, United States of America
| | - Aubrey L. Rose
- Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, United States of America
| | - Jessica K. Lerch
- Department of Neuroscience, The Ohio State University, Columbus, Ohio, United States of America
| | - Noah Weisleder
- Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, United States of America
- * E-mail:
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Faw TD, Lerch JK, Thaxton TT, Deibert RJ, Fisher LC, Basso DM. Unique Sensory and Motor Behavior in Thy1-GFP-M Mice before and after Spinal Cord Injury. J Neurotrauma 2018; 35:2167-2182. [PMID: 29385890 DOI: 10.1089/neu.2017.5395] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Sensorimotor recovery after spinal cord injury (SCI) is of utmost importance to injured individuals and will rely on improved understanding of SCI pathology and recovery. Novel transgenic mouse lines facilitate discovery, but must be understood to be effective. The purpose of this study was to characterize the sensory and motor behavior of a common transgenic mouse line (Thy1-GFP-M) before and after SCI. Thy1-GFP-M positive (TG+) mice and their transgene negative littermates (TG-) were acquired from two sources (in-house colony, n = 32, Jackson Laboratories, n = 4). C57BL/6J wild-type (WT) mice (Jackson Laboratories, n = 10) were strain controls. Moderate-severe T9 contusion (SCI) or transection (TX) occurred in TG+ (SCI, n = 25, TX, n = 5), TG- (SCI, n = 5), and WT (SCI, n = 10) mice. To determine responsiveness to rehabilitation, a cohort of TG+ mice with SCI (n = 4) had flat treadmill (TM) training 42-49 days post-injury (dpi). To characterize recovery, we performed Basso Mouse Scale, Grid Walk, von Frey Hair, and Plantar Heat Testing before and out to day 42 post-SCI. Open field locomotion was significantly better in the Thy1 SCI groups (TG+ and TG-) compared with WT by 7 dpi (p < 0.01) and was maintained through 42 dpi (p < 0.01). These unexpected locomotor gains were not apparent during grid walking, indicating severe impairment of precise motor control. Thy1 derived mice were hypersensitive to mechanical stimuli at baseline (p < 0.05). After SCI, mechanical hyposensitivity emerged in Thy1 derived groups (p < 0.001), while thermal hyperalgesia occurred in all groups (p < 0.001). Importantly, consistent findings across TG+ and TG- groups suggest that the effects are mediated by the genetic background rather than transgene manipulation itself. Surprisingly, TM training restored mechanical and thermal sensation to baseline levels in TG+ mice with SCI. This behavioral profile and responsiveness to chronic training will be important to consider when choosing models to study the mechanisms underlying sensorimotor recovery after SCI.
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Affiliation(s)
- Timothy D Faw
- 1 Neuroscience Graduate Program, The Ohio State University , Columbus, Ohio.,2 School of Health and Rehabilitation Sciences, The Ohio State University , Columbus, Ohio.,3 Center for Brain and Spinal Cord Repair, The Ohio State University , Columbus, Ohio
| | - Jessica K Lerch
- 3 Center for Brain and Spinal Cord Repair, The Ohio State University , Columbus, Ohio.,4 Department of Neuroscience, The Ohio State University , Columbus, Ohio
| | - Tyler T Thaxton
- 2 School of Health and Rehabilitation Sciences, The Ohio State University , Columbus, Ohio.,3 Center for Brain and Spinal Cord Repair, The Ohio State University , Columbus, Ohio
| | - Rochelle J Deibert
- 2 School of Health and Rehabilitation Sciences, The Ohio State University , Columbus, Ohio.,3 Center for Brain and Spinal Cord Repair, The Ohio State University , Columbus, Ohio
| | - Lesley C Fisher
- 2 School of Health and Rehabilitation Sciences, The Ohio State University , Columbus, Ohio.,3 Center for Brain and Spinal Cord Repair, The Ohio State University , Columbus, Ohio
| | - D Michele Basso
- 2 School of Health and Rehabilitation Sciences, The Ohio State University , Columbus, Ohio.,3 Center for Brain and Spinal Cord Repair, The Ohio State University , Columbus, Ohio
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4
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Affiliation(s)
- Jessica K Lerch
- Center for Brain and Spinal Cord Repair, Department of Neuroscience, Wexner Medical Center, The Ohio State University, 460 W 12(th) Ave, 696 Biomedical Research Tower, Columbus, OH, 43210, United States.
| | - William Buchser
- Department of Biology, College of William & Mary, Integrated Science Center 2135 540 Landrum Drive, Williamsburg, VA, 23185, United States.
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Song A, Zhu L, Gorantla G, Berdysz O, Amici SA, Guerau-de-Arellano M, Madalena KM, Lerch JK, Liu X, Quan N. Salient type 1 interleukin 1 receptor expression in peripheral non-immune cells. Sci Rep 2018; 8:723. [PMID: 29335509 PMCID: PMC5768710 DOI: 10.1038/s41598-018-19248-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 12/21/2017] [Indexed: 12/26/2022] Open
Abstract
Interleukin 1 is a pleiotropic cytokine that mediates diverse functions through its receptor, type I interleukin 1 receptor (IL-1R1). Most previous studies have focused on the expression and function of IL-1R1 in immune cells. Here we performed a comprehensive mapping of IL-1R1 distribution in multiple peripheral tissues using our IL-1R1 reporter (IL-1R1GR/GR) mice. This method yielded the highest sensitivity of in situ detection of IL-1R1 mRNA and protein. Besides validating previously reported IL-1R1 expression in the endocrine tissues including pituitary and pancreas, our results refuted previously reported exclusive IL-1R1 expression in neurons of the spinal cord dorsal horn and dorsal root ganglia (DRG). Instead, IL-1R1 expression was detected in endothelial cells within DRG, spinal cord, pancreas, colon, muscles and many immune organs. In addition, gp38+ fibroblastic reticular cells (FRCs), rather than tissue macrophages or other immune cells, were found to express high levels of IL-1R1 in colon and many immune organs. A functional test of spleen FRCs showed that they responded rapidly to systemic IL-1β stimulation in vivo. Taken together, this study provides a rigorous re-examination of IL-1R1 expression in peripheral tissues and reveals tissue FRCs as a previously unappreciated novel high IL-1R1-expressing cell type in peripheral IL-1 signaling.
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Affiliation(s)
- Anping Song
- Department of Oncolgy, Tongji Hospital, Huazhong University of Science and Technology Tongji Medical College, Wuhan, Hubei, 430030, P. R. China
| | - Ling Zhu
- Institute for Behavioral Medicine Research, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA.,West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan, 610041, P. R. China
| | - Gowthami Gorantla
- Institute for Behavioral Medicine Research, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA
| | - Olimpia Berdysz
- Institute for Behavioral Medicine Research, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA
| | - Stephanie A Amici
- Institute for Behavioral Medicine Research, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA.,School of Health and Rehabilitation Sciences, Division of Medical Laboratory Science, College of Medicine, Wexner Medical Center, The Ohio State University, Columbus, OH, 43210, USA
| | - Mireia Guerau-de-Arellano
- Institute for Behavioral Medicine Research, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA.,School of Health and Rehabilitation Sciences, Division of Medical Laboratory Science, College of Medicine, Wexner Medical Center, The Ohio State University, Columbus, OH, 43210, USA.,Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, USA.,Department of Neuroscience, The Ohio State University, Columbus, OH, 43210, USA
| | - Kathryn M Madalena
- Department of Neuroscience, The Ohio State University, Columbus, OH, 43210, USA.,Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, OH, 43210, USA
| | - Jessica K Lerch
- Department of Neuroscience, The Ohio State University, Columbus, OH, 43210, USA.,Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, OH, 43210, USA
| | - Xiaoyu Liu
- Institute for Behavioral Medicine Research, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA. .,Division of Biosciences, College of Dentistry, The Ohio State University, Columbus, OH, 43210, USA. .,Institute for Behavioral Medicine Research, 460 Medical Center Drive, Columbus, OH, 43210, USA.
| | - Ning Quan
- Institute for Behavioral Medicine Research, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA. .,Division of Biosciences, College of Dentistry, The Ohio State University, Columbus, OH, 43210, USA. .,Institute for Behavioral Medicine Research, 460 Medical Center Drive, Columbus, OH, 43210, USA.
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6
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Motti D, Lerch JK, Danzi MC, Gans JH, Kuo F, Slepak TI, Bixby JL, Lemmon VP. Identification of miRNAs involved in DRG neurite outgrowth and their putative targets. FEBS Lett 2017; 591:2091-2105. [PMID: 28626869 PMCID: PMC5864114 DOI: 10.1002/1873-3468.12718] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 06/07/2017] [Accepted: 06/11/2017] [Indexed: 12/14/2022]
Abstract
Peripheral neurons regenerate their axons after injury. Transcriptional regulation by microRNAs (miRNAs) is one possible mechanism controlling regeneration. We profiled miRNA expression in mouse dorsal root ganglion neurons after a sciatic nerve crush, and identified 49 differentially expressed miRNAs. We evaluated the functional role of each miRNA using a phenotypic analysis approach. To predict the targets of the miRNAs we employed RNA-Sequencing and examined transcription at the isoform level. We identify thousands of differentially expressed isoforms and bioinformatically associate the miRNAs that modulate neurite growth with their putative target isoforms to outline a network of regulatory events underlying peripheral nerve regeneration. MiR-298, let-7a, and let-7f enhance neurite growth and target the majority of isoforms in the differentially expressed network.
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Affiliation(s)
- Dario Motti
- The Miami Project To Cure Paralysis, The University of Miami Miller School of Medicine, Miami, FL
| | - Jessica K. Lerch
- The Department of Neuroscience, The Ohio State University, Columbus, OH
| | - Matt C. Danzi
- The Miami Project To Cure Paralysis, The University of Miami Miller School of Medicine, Miami, FL
| | - Jared H. Gans
- The Miami Project To Cure Paralysis, The University of Miami Miller School of Medicine, Miami, FL
| | - Frank Kuo
- The Miami Project To Cure Paralysis, The University of Miami Miller School of Medicine, Miami, FL
| | - Tatiana I. Slepak
- The Miami Project To Cure Paralysis, The University of Miami Miller School of Medicine, Miami, FL
| | - John L. Bixby
- The Miami Project To Cure Paralysis, The University of Miami Miller School of Medicine, Miami, FL
- The Department of Molecular and Cellular Pharmacology, The University of Miami Miller School of Medicine, Miami, FL
- The Department of Neurological Surgery, The University of Miami Miller School of Medicine, Miami, FL
- The Center for Computational Science, The University of Miami, Miami, FL
| | - Vance P. Lemmon
- The Miami Project To Cure Paralysis, The University of Miami Miller School of Medicine, Miami, FL
- The Department of Neurological Surgery, The University of Miami Miller School of Medicine, Miami, FL
- The Center for Computational Science, The University of Miami, Miami, FL
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7
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Church JS, Milich LM, Lerch JK, Popovich PG, McTigue DM. E6020, a synthetic TLR4 agonist, accelerates myelin debris clearance, Schwann cell infiltration, and remyelination in the rat spinal cord. Glia 2017; 65:883-899. [PMID: 28251686 DOI: 10.1002/glia.23132] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 02/02/2017] [Accepted: 02/03/2017] [Indexed: 12/26/2022]
Abstract
Oligodendrocyte progenitor cells (OPCs) are present throughout the adult brain and spinal cord and can replace oligodendrocytes lost to injury, aging, or disease. Their differentiation, however, is inhibited by myelin debris, making clearance of this debris an important step for cellular repair following demyelination. In models of peripheral nerve injury, TLR4 activation by lipopolysaccharide (LPS) promotes macrophage phagocytosis of debris. Here we tested whether the novel synthetic TLR4 agonist E6020, a Lipid A mimetic, promotes myelin debris clearance and remyelination in spinal cord white matter following lysolecithin-induced demyelination. In vitro, E6020 induced TLR4-dependent cytokine expression (TNFα, IL1β, IL-6) and NF-κB signaling, albeit at ∼10-fold reduced potency compared to LPS. Microinjection of E6020 into the intact rat spinal cord gray/white matter border induced macrophage activation, OPC proliferation, and robust oligodendrogenesis, similar to what we described previously using an intraspinal LPS microinjection model. Finally, a single co-injection of E6020 with lysolecithin into spinal cord white matter increased axon sparing, accelerated myelin debris clearance, enhanced Schwann cell infiltration into demyelinated lesions, and increased the number of remyelinated axons. In vitro assays confirmed that direct stimulation of macrophages by E6020 stimulates myelin phagocytosis. These data implicate TLR4 signaling in promoting repair after CNS demyelination, likely by stimulating phagocytic activity of macrophages, sparing axons, recruiting myelinating cells, and promoting remyelination. This work furthers our understanding of immune-myelin interactions and identifies a novel synthetic TLR4 agonist as a potential therapeutic avenue for white matter demyelinating conditions such as spinal cord injury and multiple sclerosis.
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Affiliation(s)
- Jamie S Church
- Neuroscience Graduate Program, The Ohio State University, Columbus, Ohio, USA.,Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, Ohio, USA
| | - Lindsay M Milich
- Department of Neuroscience, The Ohio State University, Columbus, Ohio, USA
| | - Jessica K Lerch
- Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, Ohio, USA.,Department of Neuroscience, The Ohio State University, Columbus, Ohio, USA
| | - Phillip G Popovich
- Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, Ohio, USA.,Department of Neuroscience, The Ohio State University, Columbus, Ohio, USA
| | - Dana M McTigue
- Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, Ohio, USA.,Department of Neuroscience, The Ohio State University, Columbus, Ohio, USA
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Quach TT, Lerch JK, Honnorat J, Khanna R, Duchemin AM. Neuronal networks in mental diseases and neuropathic pain: Beyond brain derived neurotrophic factor and collapsin response mediator proteins. World J Psychiatry 2016; 6:18-30. [PMID: 27014595 PMCID: PMC4804265 DOI: 10.5498/wjp.v6.i1.18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 11/24/2015] [Accepted: 01/07/2016] [Indexed: 02/05/2023] Open
Abstract
The brain is a complex network system that has the capacity to support emotion, thought, action, learning and memory, and is characterized by constant activity, constant structural remodeling, and constant attempt to compensate for this remodeling. The basic insight that emerges from complex network organization is that substantively different networks can share common key organizational principles. Moreover, the interdependence of network organization and behavior has been successfully demonstrated for several specific tasks. From this viewpoint, increasing experimental/clinical observations suggest that mental disorders are neural network disorders. On one hand, single psychiatric disorders arise from multiple, multifactorial molecular and cellular structural/functional alterations spreading throughout local/global circuits leading to multifaceted and heterogeneous clinical symptoms. On the other hand, various mental diseases may share functional deficits across the same neural circuit as reflected in the overlap of symptoms throughout clinical diagnoses. An integrated framework including experimental measures and clinical observations will be necessary to formulate a coherent and comprehensive understanding of how neural connectivity mediates and constraints the phenotypic expression of psychiatric disorders.
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Abstract
Glucocorticoid and glucocorticoid receptor (GC/GR) interactions alter numerous aspects of neuronal function. These consequences (e.g., anti-inflammatory vs. pro-inflammatory) can vary depending on the duration of GC exposure or central nervous system (CNS) injury model. In this review we discuss how GC/GR interactions impact neuronal recovery after a central or peripheral nerve injury and discuss how GC exposure duration can produce divergent CNS neuronal growth responses. Finally we consider how new findings on gender specific immune cell responses after a nerve injury could intersect with GC/GR interactions to impact pain processing.
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Affiliation(s)
- Kathryn M Madalena
- Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, OH, USA; Department of Neuroscience, Wexner Medical Center at The Ohio State University, Columbus, OH, USA
| | - Jessica K Lerch
- Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, OH, USA; Department of Neuroscience, Wexner Medical Center at The Ohio State University, Columbus, OH, USA
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10
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Shettigar V, Zhang B, Little SC, Salhi HE, Hansen BJ, Li N, Zhang J, Roof SR, Ho HT, Brunello L, Lerch JK, Weisleder N, Fedorov VV, Accornero F, Rafael-Fortney JA, Gyorke S, Janssen PML, Biesiadecki BJ, Ziolo MT, Davis JP. Rationally engineered Troponin C modulates in vivo cardiac function and performance in health and disease. Nat Commun 2016; 7:10794. [PMID: 26908229 PMCID: PMC4770086 DOI: 10.1038/ncomms10794] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 01/21/2016] [Indexed: 12/26/2022] Open
Abstract
Treatment for heart disease, the leading cause of death in the world, has progressed little for several decades. Here we develop a protein engineering approach to directly tune in vivo cardiac contractility by tailoring the ability of the heart to respond to the Ca(2+) signal. Promisingly, our smartly formulated Ca(2+)-sensitizing TnC (L48Q) enhances heart function without any adverse effects that are commonly observed with positive inotropes. In a myocardial infarction (MI) model of heart failure, expression of TnC L48Q before the MI preserves cardiac function and performance. Moreover, expression of TnC L48Q after the MI therapeutically enhances cardiac function and performance, without compromising survival. We demonstrate engineering TnC can specifically and precisely modulate cardiac contractility that when combined with gene therapy can be employed as a therapeutic strategy for heart disease.
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Affiliation(s)
- Vikram Shettigar
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Bo Zhang
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Sean C Little
- Bristol-Myers Squibb, Department of Discovery Biology, Wallingford, Connecticut 06492, USA
| | - Hussam E Salhi
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Brian J Hansen
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Ning Li
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Jianchao Zhang
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | | | - Hsiang-Ting Ho
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Lucia Brunello
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Jessica K Lerch
- Center for Brain and Spinal Cord Repair, Department of Neuroscience, The Ohio State University College of Medicine, Columbus, Ohio 43210, USA
| | - Noah Weisleder
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Vadim V Fedorov
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Federica Accornero
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Jill A Rafael-Fortney
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Sandor Gyorke
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Paul M L Janssen
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Brandon J Biesiadecki
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Mark T Ziolo
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
| | - Jonathan P Davis
- Davis Heart and Lung Research Institute and Department of Physiology and Cell Biology, Columbus, Ohio 43210, USA
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Simpson MT, Venkatesh I, Callif BL, Thiel LK, Coley DM, Winsor KN, Wang Z, Kramer AA, Lerch JK, Blackmore MG. The tumor suppressor HHEX inhibits axon growth when prematurely expressed in developing central nervous system neurons. Mol Cell Neurosci 2015; 68:272-83. [PMID: 26306672 DOI: 10.1016/j.mcn.2015.08.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 07/30/2015] [Accepted: 08/17/2015] [Indexed: 01/21/2023] Open
Abstract
Neurons in the embryonic and peripheral nervous system respond to injury by activating transcriptional programs supportive of axon growth, ultimately resulting in functional recovery. In contrast, neurons in the adult central nervous system (CNS) possess a limited capacity to regenerate axons after injury, fundamentally constraining repair. Activating pro-regenerative gene expression in CNS neurons is a promising therapeutic approach, but progress is hampered by incomplete knowledge of the relevant transcription factors. An emerging hypothesis is that factors implicated in cellular growth and motility outside the nervous system may also control axon growth in neurons. We therefore tested sixty-nine transcription factors, previously identified as possessing tumor suppressive or oncogenic properties in non-neuronal cells, in assays of neurite outgrowth. This screen identified YAP1 and E2F1 as enhancers of neurite outgrowth, and PITX1, RBM14, ZBTB16, and HHEX as inhibitors. Follow-up experiments are focused on the tumor suppressor HHEX, one of the strongest growth inhibitors. HHEX is widely expressed in adult CNS neurons, including corticospinal tract neurons after spinal injury, but is present only in trace amounts in immature cortical neurons and adult peripheral neurons. HHEX overexpression in early postnatal cortical neurons reduced both initial axonogenesis and the rate of axon elongation, and domain deletion analysis strongly implicated transcriptional repression as the underlying mechanism. These findings suggest a role for HHEX in restricting axon growth in the developing CNS, and substantiate the hypothesis that previously identified oncogenes and tumor suppressors can play conserved roles in axon extension.
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Affiliation(s)
- Matthew T Simpson
- Marquette University, Department of Biomedical Sciences, 53201, United States
| | - Ishwariya Venkatesh
- Marquette University, Department of Biomedical Sciences, 53201, United States
| | - Ben L Callif
- Marquette University, Department of Biomedical Sciences, 53201, United States
| | - Laura K Thiel
- Marquette University, Department of Biomedical Sciences, 53201, United States
| | - Denise M Coley
- Marquette University, Department of Biomedical Sciences, 53201, United States
| | - Kristen N Winsor
- Marquette University, Department of Biomedical Sciences, 53201, United States
| | - Zimei Wang
- Marquette University, Department of Biomedical Sciences, 53201, United States
| | - Audra A Kramer
- Marquette University, Department of Biomedical Sciences, 53201, United States
| | - Jessica K Lerch
- The Ohio State University, The Center for Brain and Spinal Cord Repair, The Department of Neuroscience, 43210, United States
| | - Murray G Blackmore
- Marquette University, Department of Biomedical Sciences, 53201, United States.
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12
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Lerch JK, Puga DA, Bloom O, Popovich PG. Glucocorticoids and macrophage migration inhibitory factor (MIF) are neuroendocrine modulators of inflammation and neuropathic pain after spinal cord injury. Semin Immunol 2014; 26:409-14. [DOI: 10.1016/j.smim.2014.03.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 03/18/2014] [Indexed: 11/29/2022]
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Raju HB, Englander Z, Capobianco E, Tsinoremas NF, Lerch JK. Identification of potential therapeutic targets in a model of neuropathic pain. Front Genet 2014; 5:131. [PMID: 24904634 PMCID: PMC4033210 DOI: 10.3389/fgene.2014.00131] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 04/24/2014] [Indexed: 01/18/2023] Open
Abstract
Neuropathic pain (NP) is caused by damage to the nervous system, resulting in dysfunction and aberrant pain. The cellular functions (e.g., peripheral neuron spinal cord innervation, neuronal excitability) associated with NP often develop over time and are likely associated with gene expression changes. Gene expression studies on the cells involved in NP (e.g., sensory dorsal root ganglion neurons) are publically available; the mining of these studies may enable the identification of novel targets and the subsequent development of therapies that are essential for improving quality of life for the millions of individuals suffering with NP. Here we analyzed a publically available microarray dataset (GSE30165) in order to identify new RNAs (e.g., messenger RNA (mRNA) isoforms and non-coding RNAs) underlying NP. GSE30165 profiled gene expression in dorsal root ganglion neurons (DRG) and in sciatic nerve (SN) after resection, a NP model. Gene ontological analysis shows enrichment for sensory and neuronal processes. Protein network analysis demonstrates DRG upregulated genes typical to an injury and NP response. Of the top changing genes, 34 and 36% are associated with more than one protein coding isoform in the DRG and SN, respectively. The majority of genes are receptor and enzymes. We identified 15 long non-coding RNAs (lncRNAs) targeting these genes in LNCipedia.org, an online comprehensive lncRNA database. These RNAs represent new therapeutic targets for preventing NP development and this approach demonstrates the feasibility of data reanalysis for their identification.
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Affiliation(s)
- Hemalatha B Raju
- Center for Computational Science, Department of Medicine, University of Miami Miller School of Medicine Miami, FL, USA ; Human Genetics and Genomics Graduate Program, University of Miami Miller School of Medicine Miami, FL, USA
| | - Zoe Englander
- Department of Biomedical Engineering, Duke University Durham, NC, USA
| | - Enrico Capobianco
- Center for Computational Science, Department of Medicine, University of Miami Miller School of Medicine Miami, FL, USA ; Laboratory of Integrative Systems Medicine, National Research Council (CNR) Pisa, Italy
| | - Nicholas F Tsinoremas
- Center for Computational Science, Department of Medicine, University of Miami Miller School of Medicine Miami, FL, USA
| | - Jessica K Lerch
- Department of Neuroscience, Center for Brain and Spinal Cord Repair, The Ohio State University Columbus, OH, USA
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14
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Lerch JK, Kuo F, Motti D, Morris R, Bixby JL, Lemmon VP. Isoform diversity and regulation in peripheral and central neurons revealed through RNA-Seq. PLoS One 2012; 7:e30417. [PMID: 22272348 PMCID: PMC3260295 DOI: 10.1371/journal.pone.0030417] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 12/15/2011] [Indexed: 11/19/2022] Open
Abstract
To fully understand cell type identity and function in the nervous system there is a need to understand neuronal gene expression at the level of isoform diversity. Here we applied Next Generation Sequencing of the transcriptome (RNA-Seq) to purified sensory neurons and cerebellar granular neurons (CGNs) grown on an axonal growth permissive substrate. The goal of the analysis was to uncover neuronal type specific isoforms as a prelude to understanding patterns of gene expression underlying their intrinsic growth abilities. Global gene expression patterns were comparable to those found for other cell types, in that a vast majority of genes were expressed at low abundance. Nearly 18% of gene loci produced more than one transcript. More than 8000 isoforms were differentially expressed, either to different degrees in different neuronal types or uniquely expressed in one or the other. Sensory neurons expressed a larger number of genes and gene isoforms than did CGNs. To begin to understand the mechanisms responsible for the differential gene/isoform expression we identified transcription factor binding sites present specifically in the upstream genomic sequences of differentially expressed isoforms, and analyzed the 3′ untranslated regions (3′ UTRs) for microRNA (miRNA) target sites. Our analysis defines isoform diversity for two neuronal types with diverse axon growth capabilities and begins to elucidate the complex transcriptional landscape in two neuronal populations.
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Affiliation(s)
- Jessica K. Lerch
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Miami, Florida, United States of America
| | - Frank Kuo
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Miami, Florida, United States of America
| | - Dario Motti
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Miami, Florida, United States of America
| | - Richard Morris
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Miami, Florida, United States of America
- The Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, United States of America
| | - John L. Bixby
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Miami, Florida, United States of America
- The Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, United States of America
- Department of Cellular and Molecular Pharmacology, Miller School of Medicine, University of Miami, Miami, Florida, United States of America
- * E-mail: (VPL); (JLB)
| | - Vance P. Lemmon
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Miami, Florida, United States of America
- Department of Neurological Surgery, Miller School of Medicine, University of Miami, Miami, Florida, United States of America
- * E-mail: (VPL); (JLB)
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15
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Abstract
Axon regeneration is a fundamental problem facing neuroscientists and clinicians. Failure of axon regeneration is caused by both extrinsic and intrinsic mechanisms. New techniques to examine gene expression such as Next Generation Sequencing of the Transcriptome (RNA-Seq) drastically increase our knowledge of both gene expression complexity (RNA isoforms) and gene expression regulation. By utilizing RNA-Seq, gene expression can now be defined at the level of isoforms, an essential step for understanding the mechanisms governing cell identity, growth and ultimately cellular responses to injury and disease.
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Affiliation(s)
- Jessica K Lerch
- The Miami Project to Cure Paralysis, The University of Miami, Miami, FL, USA
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16
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Scott MM, Wylie CJ, Lerch JK, Murphy R, Lobur K, Herlitze S, Jiang W, Conlon RA, Strowbridge BW, Deneris ES. A genetic approach to access serotonin neurons for in vivo and in vitro studies. Proc Natl Acad Sci U S A 2005; 102:16472-7. [PMID: 16251278 PMCID: PMC1283423 DOI: 10.1073/pnas.0504510102] [Citation(s) in RCA: 174] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2005] [Indexed: 01/06/2023] Open
Abstract
Serotonin (5HT) is a critical modulator of neural circuits that support diverse behaviors and physiological processes, and multiple lines of evidence implicate abnormal serotonergic signaling in psychiatric pathogenesis. The significance of 5HT underscores the importance of elucidating the molecular pathways involved in serotonergic system development, function, and plasticity. However, these mechanisms remain poorly defined, owing largely to the difficulty of accessing 5HT neurons for experimental manipulation. To address this methodological deficiency, we present a transgenic route to selectively alter 5HT neuron gene expression. This approach is based on the ability of a Pet-1 enhancer region to direct reliable 5HT neuron-specific transgene expression in the CNS. Its versatility is illustrated with several transgenic mouse lines, each of which provides a tool for 5HT neuron studies. Two lines allow Cre-mediated recombination at different stages of 5HT neuron development. A third line in which 5HT neurons are marked with yellow fluorescent protein will have numerous applications, including their electrophysiological characterization. To demonstrate this application, we have characterized active and passive membrane properties of midbrain reticular 5HT neurons, which heretofore have not been reported to our knowledge. A fourth line in which Pet-1 loss of function is rescued by expression of a Pet-1 transgene demonstrates biologically relevant levels of transgene expression and offers a route for investigating serotonergic protein structure and function in a behaving animal. These findings establish a straightforward and reliable approach for developing an array of tools for in vivo and in vitro studies of 5HT neurons.
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Affiliation(s)
- Michael M Scott
- Departments of Neurosciences and Genetics, Case School of Medicine, and Case Transgenic and Targeting Core Facility, Case Western Reserve University, Cleveland, OH 44106, USA
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