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Gschwendtberger T, Thau-Habermann N, von der Ohe J, Luo T, Hass R, Petri S. Protective effects of EVs/exosomes derived from permanently growing human MSC on primary murine ALS motor neurons. Neurosci Lett 2023; 816:137493. [PMID: 37774774 DOI: 10.1016/j.neulet.2023.137493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/29/2023] [Accepted: 09/19/2023] [Indexed: 10/01/2023]
Abstract
In recent years, the neuroprotective potential of mesenchymal stroma-/stem-like cells (MSC) as well as of MSC-derived extracellular vesicles (EVs) like exosomes has been intensively explored. This included preclinical evaluation regarding treatment of neurodegenerative disorders such as the fatal motor neuron disease amyotrophic Lateral Sclerosis (ALS). Several studies have reported that MSC-derived exosomes can stimulate tissue regeneration and reduce inflammation. MSC release EVs and trophic factors and thereby modify cell-to-cell communication. These cell-free products may protect degenerating motor neurons (MNs) and represent a potential therapeutic approach for ALS. In the present study we investigated the effects of exosomes derived from a permanently growing MSC line on both, wild type and ALS (SOD1G93A transgenic) primary motor neurons. Following application in a normal and stressed environment we could demonstrate beneficial effects of MSC exosomes on neurite growth and morphology indicating the potential for further preclinical evaluation and clinical therapeutic development. Investigation of gene expression profiles detected transcripts of several antioxidant and anti-inflammatory genes in MSC exosomes. Characterization of their microRNA (miRNA) content revealed miRNAs capable of regulating antioxidant and anti-apoptotic pathways.
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Affiliation(s)
- Thomas Gschwendtberger
- Department of Neurology, Hannover Medical School, Hannover 30625, Germany; Center for Systems Neuroscience (ZSN), Hannover, Germany
| | | | - Juliane von der Ohe
- Biochemistry and Tumor Biology Lab, Department of Obstetrics and Gynecology, Hannover Medical School, Hannover 30625, Germany
| | - Tianjiao Luo
- Biochemistry and Tumor Biology Lab, Department of Obstetrics and Gynecology, Hannover Medical School, Hannover 30625, Germany
| | - Ralf Hass
- Biochemistry and Tumor Biology Lab, Department of Obstetrics and Gynecology, Hannover Medical School, Hannover 30625, Germany.
| | - Susanne Petri
- Department of Neurology, Hannover Medical School, Hannover 30625, Germany; Center for Systems Neuroscience (ZSN), Hannover, Germany.
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Thompson D, Odufuwa AE, Brissette CA, Watt JA. Transcriptome and methylome of the supraoptic nucleus provides insights into the age-dependent loss of neuronal plasticity. Front Aging Neurosci 2023; 15:1223273. [PMID: 37711995 PMCID: PMC10498476 DOI: 10.3389/fnagi.2023.1223273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 08/08/2023] [Indexed: 09/16/2023] Open
Abstract
The age-dependent loss of neuronal plasticity is a well-known phenomenon that is poorly understood. The loss of this capacity for axonal regeneration is emphasized following traumatic brain injury, which is a major cause of disability and death among adults in the US. We have previously shown the intrinsic capacity of magnocellular neurons within the supraoptic nucleus to undergo axonal regeneration following unilateral axotomization in an age-dependent manner. The aim of this research was to determine the age-dependent molecular mechanisms that may underlie this phenomenon. As such, we characterized the transcriptome and DNA methylome of the supraoptic nucleus in uninjured 35-day old rats and 125-day old rats. Our data indicates the downregulation of a large number of axonogenesis related transcripts in 125-day old rats compared to 35-day old rats. Specifically, several semaphorin and ephrin genes were downregulated, as well as growth factors including FGF's, insulin-like growth factors (IGFs), and brain-derived neurotrophic factor (BDNF). Differential methylation analysis indicates enrichment of biological processes involved in axonogenesis and axon guidance. Conversely, we observed a robust and specific upregulation of MHCI related transcripts. This may involve the activator protein 1 (AP-1) transcription factor complex as motif analysis of differentially methylated regions indicate enrichment of AP-1 binding sites in hypomethylated regions. Together, our data suggests a loss of pro-regenerative capabilities with age which would prevent axonal growth and appropriate innervation following injury.
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Affiliation(s)
| | | | | | - John A. Watt
- Department of Biomedical Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, United States
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Askvig JM, Irmen RE, Dalzell TS, Whiteman ST, Andersen MJ, Said Z, Nguyen DQ, Bexell SH, Maruska BL. Axotomy results in an increase in Thy-1 protein in the 35-day-old rat supraoptic nucleus. Exp Brain Res 2023; 241:851-864. [PMID: 36757564 DOI: 10.1007/s00221-023-06562-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 01/19/2023] [Indexed: 02/10/2023]
Abstract
We demonstrated previously that the hypothalamic supraoptic nucleus (SON) undergoes an axonal sprouting response following a unilateral lesion of the hypothalamo-neurohypophysial tract in a 35-day-old rat to repopulate the partially denervated neural lobe (NL). However, no sprouting occurs following the same injury in a 125-day-old rat. We previously reported a significant increase in Thy-1 protein in the SON of a 125-day-old rat compared to a 35-day-old rat in the absence of injury. Thy-1 is a cell surface glycoprotein shown to inhibit axonal outgrowth following injury; however, we did not look at axotomy's effect on Thy-1 in the SON. Therefore, we sought to determine the integrin ligands that bind Thy-1 in the SON and how axotomy impacts Thy-1. Like what others have shown, the co-immunoprecipitation analysis demonstrated that Thy-1 interacts with αvß3 and αvß5 integrin dimers in the SON. We used western blot analysis to examine protein levels of Thy-1 and integrin subunits following injury in the 35- and 125-day-old rat SON and NL. Our results demonstrated that Thy-1 protein levels increase in the lesion SON in a 35-day-old rat. The quantitative dual-fluorescent analysis showed that the increase in Thy-1 in the lesion SON occurred in astrocytes. There was no change in Thy-1 or integrin protein levels following injury in the 125-day-old following injury. Furthermore, the axotomy significantly decreased Thy-1 protein levels in the NL of both 35- and 125-day-old rats. These results provide evidence that Thy-1 protein levels are injury dependent in the magnocellular neurosecretory system.
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Affiliation(s)
- Jason M Askvig
- Department of Biology and Neuroscience Program, Concordia College, Jason Askvig, 901 S 8th St, Moorhead, MN, 56562, USA.
| | - Riley E Irmen
- Department of Biology and Neuroscience Program, Concordia College, Jason Askvig, 901 S 8th St, Moorhead, MN, 56562, USA
| | - Talia S Dalzell
- Department of Biology and Neuroscience Program, Concordia College, Jason Askvig, 901 S 8th St, Moorhead, MN, 56562, USA
| | - Sara T Whiteman
- Department of Biology and Neuroscience Program, Concordia College, Jason Askvig, 901 S 8th St, Moorhead, MN, 56562, USA
| | - Marissa J Andersen
- Department of Biology and Neuroscience Program, Concordia College, Jason Askvig, 901 S 8th St, Moorhead, MN, 56562, USA
| | - Zaynab Said
- Department of Biology and Neuroscience Program, Concordia College, Jason Askvig, 901 S 8th St, Moorhead, MN, 56562, USA
| | - Duong Q Nguyen
- Department of Biology and Neuroscience Program, Concordia College, Jason Askvig, 901 S 8th St, Moorhead, MN, 56562, USA
| | - Sydney H Bexell
- Department of Biology and Neuroscience Program, Concordia College, Jason Askvig, 901 S 8th St, Moorhead, MN, 56562, USA
| | - Brooke L Maruska
- Department of Biology and Neuroscience Program, Concordia College, Jason Askvig, 901 S 8th St, Moorhead, MN, 56562, USA
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Boyd P, Campbell LJ, Hyde DR. Clcf1/Crlf1a-mediated signaling is neuroprotective and required for Müller glia proliferation in the light-damaged zebrafish retina. Front Cell Dev Biol 2023; 11:1142586. [PMID: 36846595 PMCID: PMC9950120 DOI: 10.3389/fcell.2023.1142586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 01/30/2023] [Indexed: 02/12/2023] Open
Abstract
Zebrafish possess the innate ability to fully regenerate any neurons lost following a retinal injury. This response is mediated by Müller glia that reprogram and divide asymmetrically to produce neuronal precursor cells that differentiate into the lost neurons. However, little is understood about the early signals that induce this response. Ciliary neurotrophic factor (CNTF) was previously shown to be both neuroprotective and pro-proliferative within the zebrafish retina, however CNTF is not expressed following injury. Here we demonstrate that alternative ligands of the Ciliary neurotrophic factor receptor (CNTFR), such as Cardiotrophin-like cytokine factor 1 (Clcf1) and Cytokine receptor-like factor 1a (Crlf1a), are expressed within Müller glia of the light-damaged retina. We found that CNTFR, Clcf1, and Crlf1a are required for Müller glia proliferation in the light-damaged retina. Furthermore, intravitreal injection of CLCF1/CRLF1 protected against rod photoreceptor cell death in the light-damaged retina and induced proliferation of rod precursor cells in the undamaged retina, but not Müller glia. While rod precursor cell proliferation was previously shown to be Insulin-like growth factor 1 receptor (IGF-1R)-dependent, co-injection of IGF-1 with CLCF1/CRLF1 failed to induce further proliferation of either Müller glia or rod precursor cells. Together, these findings demonstrate that CNTFR ligands have a neuroprotective effect and are required for induction of Müller glia proliferation in the light-damaged zebrafish retina.
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Affiliation(s)
| | | | - David R. Hyde
- Department of Biological Sciences, Center for Stem Cells and Regenerative Medicine, and Center for Zebrafish Research, Galvin Life Sciences Building, University of Notre Dame, Notre Dame, IN, United States
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Lee K, Choi JO, Hwang A, Bae HW, Kim CY. Ciliary Neurotrophic Factor Derived From Astrocytes Protects Retinal Ganglion Cells Through PI3K/AKT, JAK/STAT, and MAPK/ERK Pathways. Invest Ophthalmol Vis Sci 2022; 63:4. [PMID: 35925584 PMCID: PMC9363680 DOI: 10.1167/iovs.63.9.4] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 07/11/2022] [Indexed: 11/24/2022] Open
Abstract
Purpose The purpose of this study was to investigate the roles of ciliary neurotrophic factor (CNTF) on the protective effects of astrocytes on retinal ganglion cells (RGCs). Methods Primary RGCs were isolated from neonatal rats. Oxidative stress was induced, and the effects of co-culture with astrocytes and CNTF treatment on RGCs were evaluated. The pathways commonly altered by astrocytes and CNTF were investigated. Effects of each pathway were investigated using pathway inhibitors against PI3K/AKT, JAK/STAT, and MAPK/ERK. RNA sequencing was performed to identify the genes upregulated and downregulated by CNTF treatment. Results Astrocytes improved the viability and increased β3-tubulin expression in RGCs. The concentration of CNTF increased in the RGC-astrocyte co-culture medium. The protective effects of astrocytes were abolished by neutralization with the anti-CNTF antibody; thus, CNTF may play an important role in the effects mediated by astrocytes. Furthermore, CNTF treatment alone enhanced the viability and β3-tubulin expression of RGCs and increased the population of viable RGCs under oxidative stress. The PI3K/AKT pathway was associated with both RGC viability and β3-tubulin expression. However, the JAK/STAT pathway increased the viability of RGCs, whereas the MAPK/ERK pathway was associated with β3-tubulin expression. RNA sequencing revealed the CNTF-upregulated genes associated with response to DNA damage and downregulated genes associated with photoreceptor cell differentiation. Conclusions Our data revealed protective effects of astrocyte-derived CNTF on RGCs. In addition, we showed that multiple pathways exert these protective effects and identified the novel genes involved. These results may be helpful in developing treatments for RGC injury.
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Affiliation(s)
- Kwanghyun Lee
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Republic of Korea
- Department of Ophthalmology, National Health Insurance Service Ilsan Hospital, Goyang, Gyeonggi-do, Republic of Korea
| | - Jin-Ok Choi
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Ahreum Hwang
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Hyoung Won Bae
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Chan Yun Kim
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Republic of Korea
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Basic Fibroblast Growth Factor Induces Cholinergic Differentiation of Tonsil-Derived Mesenchymal Stem Cells. Tissue Eng Regen Med 2022; 19:1063-1075. [PMID: 35857260 DOI: 10.1007/s13770-022-00474-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/18/2022] [Accepted: 06/20/2022] [Indexed: 10/17/2022] Open
Abstract
BACKGROUND Mesenchymal stem cells (MSCs) are considered a potential tool for regenerating damaged tissues due to their great multipotency into various cell types. Here, we attempted to find the appropriate conditions for neuronal differentiation of tonsil-derived MSCs (TMSCs) and expand the potential application of TMSCs for treating neurological diseases. METHODS The TMSCs were differentiated in DMEM/F-12 (Dulbecco's Modified Eagle Medium/Nutrient Mixture F-12) supplemented with various neurotrophic factors for 7-28 days to determine the optimal neuronal differentiation condition for the TMSCs. The morphologies as well as the levels of the neural markers and neurotransmitters were assessed to determine neuronal differentiation potentials and the neuronal lineages of the differentiated TMSCs. RESULTS Our initial study demonstrated that DMEM/F12 supplemented with 50 ng/mL basic fibroblast growth factor with 10 μM forskolin was the optimal condition for neuronal differentiation for the TMSCs. TMSCs had higher protein expression of neuronal markers, including neuron-specific enolase (NSE), GAP43, postsynaptic density protein 95 (PSD95), and synaptosomal-associated protein of 25 kDa (SNAP25) compared to the undifferentiated TMSCs. Immunofluorescence staining also validated the increased mature neuron markers, NeuN and synaptophysin, in the differentiated TMSCs. The expression of glial fibrillar acidic protein and ionized calcium-binding adaptor molecule 1 the markers of astrocytes and microglia, were also slightly increased. Additionally, the differentiated TMSCs released a significantly higher level of acetylcholine, the cholinergic neurotransmitter, as analyzed by the liquid chromatography-tandem mass spectrometry and showed an enhanced choline acetyltransferase immunoreactivity compared to the undifferentiated cells. CONCLUSION Our study suggests that the optimized condition favors the TMSCs to differentiate into cholinergic neuron-like phenotype, which could be used as a possible therapeutic tool in treating certain neurological disorders such as Alzheimer's disease.
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Topical application of CNTF, GDNF and BDNF in combination attenuates blood-spinal cord barrier permeability, edema formation, hemeoxygenase-2 upregulation, and cord pathology. PROGRESS IN BRAIN RESEARCH 2021; 266:357-376. [PMID: 34689864 DOI: 10.1016/bs.pbr.2021.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Spinal cord injury (SCI) is one of the leading causes of disability in Military personnel for which no suitable therapeutic strategies are available till today. Thus, exploration of novel therapeutic measures is highly needed to enhance the quality of life of SCI victims. Previously, topical application of BDNF and GDNF in combination over the injured spinal cord after 90min induced marked neuroprotection. In present investigation, we added CNTF in combination with BDNF and/or GDNF treatment to examine weather the triple combination applied over the traumatic cord after 90 or 120min could thwart cord pathology. Since neurotrophins attenuate nitric oxide (NO) production in SCI, the role of carbon monoxide (CO) production that is similar to NO in inducing cell injury was explored using immunohistochemistry of the constitutive isoform of enzyme hemeoxygenase-2 (HO-2). SCI inflicted over the right dorsal horn of the T10-11 segments by making an incision of 2mm deep and 5mm long upregulated the HO-2 immunostaining in the T9 and T12 segments after 5h injury. These perifocal segments are associated with breakdown of the blood-spinal cord barrier (BSCB), edema development and cell injuries. Topical application of CNTF with BDNF and GDNF in combination (10ng each) after 90 and 120min over the injured spinal cord significantly attenuated the BSCB breakdown, edema formation, cell injury and overexpression of HO-2. These observations are the first to show that CNTF with BDNF and GDNF induced superior neuroprotection in SCI probably by downregulation of CO production, not reported earlier.
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Onesto MM, Short CA, Rempel SK, Catlett TS, Gomez TM. Growth Factors as Axon Guidance Molecules: Lessons From in vitro Studies. Front Neurosci 2021; 15:678454. [PMID: 34093120 PMCID: PMC8175860 DOI: 10.3389/fnins.2021.678454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 04/26/2021] [Indexed: 11/13/2022] Open
Abstract
Growth cones at the tips of extending axons navigate through developing organisms by probing extracellular cues, which guide them through intermediate steps and onto final synaptic target sites. Widespread focus on a few guidance cue families has historically overshadowed potentially crucial roles of less well-studied growth factors in axon guidance. In fact, recent evidence suggests that a variety of growth factors have the ability to guide axons, affecting the targeting and morphogenesis of growth cones in vitro. This review summarizes in vitro experiments identifying responses and signaling mechanisms underlying axon morphogenesis caused by underappreciated growth factors.
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Affiliation(s)
| | | | | | | | - Timothy M. Gomez
- Neuroscience Training Program and Cell and Molecular Biology Program, Department of Neuroscience, University of Wisconsin–Madison, Madison, WI, United States
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Askvig JM, Dalzell TS, Toumeh N, Kuball PT, Whiteman ST, Bye EW, Andersen MJ, McCarthy MG, Irmen RE, Bexell SH, Benolken MM, Maruska BL, Nordmann SE. Age-dependent increase in Thy-1 protein in the rat supraoptic nucleus. Heliyon 2020; 6:e03501. [PMID: 32181386 PMCID: PMC7066247 DOI: 10.1016/j.heliyon.2020.e03501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 10/15/2019] [Accepted: 02/24/2020] [Indexed: 11/29/2022] Open
Abstract
Mature mammalian CNS neurons often do not recover successfully following injury. To this point, unilateral lesion of the hypothalamo-neurohypophysial tract results in collateral sprouting from uninjured axons of the supraoptic nucleus (SON) in 35-day-old but not in 125-day-old rats. Thus, it appears that there are age-related changes within the SON that preclude the older rat from recovering following axotomy. We hypothesize that the intrinsic capacity for axon reorganization may depend, in part, on age-related alterations in cell adhesion molecules that allow normal astrocyte-neuron interactions in the SON. In support of our hypothesis, numerous reports have shown that Thy-1 is increased in neurons at the cessation of axon outgrowth. Therefore, we compared protein levels of Thy-1 and the Thy-1 interacting integrin subunits, alpha-v (αv), beta-3 (ß3), and beta-5 (ß5), in 35- and 125-day-old SON using western blot analysis. Our results demonstrated that there was significantly more Thy-1 protein in the 125-day-old SON compared to 35-day-old SON, but no change in the protein levels of the integrin subunits. Furthermore, we localized Thy-1-, αv integrin-, ß3 integrin-, and ß5 integrin-immunoreactivity to both neurons and astrocytes in the SON. Altogether, our results suggest that the observed increase in Thy-1 protein levels in the SON with age may contribute to an environment that prevents collateral axonal sprouting in the SON of the 125-day-old rat.
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Affiliation(s)
- Jason M Askvig
- Department of Biology, Concordia College, Moorhead, MN, 56562, USA
| | - Talia S Dalzell
- Department of Biology, Concordia College, Moorhead, MN, 56562, USA
| | - Nadia Toumeh
- Department of Biology, Concordia College, Moorhead, MN, 56562, USA
| | - Phillip T Kuball
- Department of Biology, Concordia College, Moorhead, MN, 56562, USA
| | - Sara T Whiteman
- Department of Biology, Concordia College, Moorhead, MN, 56562, USA
| | - Erik W Bye
- Department of Biology, Concordia College, Moorhead, MN, 56562, USA
| | | | | | - Riley E Irmen
- Department of Biology, Concordia College, Moorhead, MN, 56562, USA
| | - Sydney H Bexell
- Department of Biology, Concordia College, Moorhead, MN, 56562, USA
| | - Molly M Benolken
- Department of Biology, Concordia College, Moorhead, MN, 56562, USA
| | - Brooke L Maruska
- Department of Biology, Concordia College, Moorhead, MN, 56562, USA
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Vitoux MA, Kessal K, Melik Parsadaniantz S, Claret M, Guerin C, Baudouin C, Brignole-Baudouin F, Réaux-Le Goazigo A. Benzalkonium chloride-induced direct and indirect toxicity on corneal epithelial and trigeminal neuronal cells: proinflammatory and apoptotic responses in vitro. Toxicol Lett 2019; 319:74-84. [PMID: 31707104 DOI: 10.1016/j.toxlet.2019.10.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 10/03/2019] [Accepted: 10/18/2019] [Indexed: 11/17/2022]
Abstract
Benzalkonium chloride (BAK), a quaternary ammonium compound widely used as disinfecting agent as well as preservative in eye drops is known to induce toxic effects on the ocular surface with inflammation and corneal nerve damage leading to dry eye disease (DED) in the medium-to-long term. The aim of this study was to evaluate in vitro the toxicity of a conditioned medium produced by corneal epithelial cells previously exposed to BAK (BAK-CM) on trigeminal neuronal cells. A human corneal epithelial (HCE) cell line was exposed to 5.10-3% BAK (i.e. 0.005% BAK) for 15 min and let recover for 5 h to prepare a BAK-CM. This BAK concentration is the lowest one found in eye drops. After this recovery period, BAK effect on HCE cells displayed cytotoxicity, morphological alteration, apoptosis, oxidative stress, ATP release, CCL2 and IL6 gene induction, as well as an increase in CCL2, IL-6 and MIF release. Next, a mouse trigeminal ganglion primary culture was exposed to the BAK-CM for 2 h, 4 h or 24 h. Whereas BAK-CM did not alter neuronal cell morphology, or induced neuronal cytotoxicity or oxidative stress, BAK-CM induced gene expression of Fos (neuronal activation marker), Atf3 (neuronal injury marker), Ccl2 and Il6 (inflammatory markers). Two and 4 h BAK-CM exposure promoted a neuronal damage (ATF-3, phospho-p38 increases; phospho-Stat3 decreases) while 24 h-BAK-CM exposure initiated a prosurvival pathway activation (phospho-p44/42, phospho-Akt increases; ATF-3, GADD153, active Caspase-3 decreases). In conclusion, this in vitro model, simulating paracrine mechanisms, represents an interesting tool to highlight the indirect toxic effects of BAK or any other xenobiotic on corneal trigeminal neurons and may help to better understand the cellular mechanisms that occur during DED pathophysiology.
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Affiliation(s)
- Michael-Adrien Vitoux
- Sorbonne Université, INSERM, CNRS, IHU Foresight, Institut de la Vision, F-75012 Paris, France; HORUS PHARMA, F-06700 Saint-Laurent-du-Var, France
| | - Karima Kessal
- Sorbonne Université, INSERM, CNRS, IHU Foresight, Institut de la Vision, F-75012 Paris, France; Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, F-75012 Paris, France
| | | | | | | | - Christophe Baudouin
- Sorbonne Université, INSERM, CNRS, IHU Foresight, Institut de la Vision, F-75012 Paris, France; Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, F-75012 Paris, France; Université Versailles-Saint-Quentin-en-Yvelines, Hôpital Ambroise Paré, APHP, F-92100 Boulogne-Billancourt, France
| | - Françoise Brignole-Baudouin
- Sorbonne Université, INSERM, CNRS, IHU Foresight, Institut de la Vision, F-75012 Paris, France; Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, F-75012 Paris, France; Université de Paris, Faculté de Pharmacie de Paris, F-75006 Paris, France
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Zang YQ, Feng YY, Luo YH, Zhai YQ, Ju XY, Feng YC, Wang JR, Yu CQ, Jin CH. Glycitein induces reactive oxygen species-dependent apoptosis and G0/G1 cell cycle arrest through the MAPK/STAT3/NF-κB pathway in human gastric cancer cells. Drug Dev Res 2019; 80:573-584. [PMID: 30916421 DOI: 10.1002/ddr.21534] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/26/2019] [Accepted: 03/18/2019] [Indexed: 02/06/2023]
Abstract
Glycitein is an isoflavone that reportedly inhibits the proliferation of human breast cancer and prostate cancer cells. However, its anti-cancer molecular mechanisms in human gastric cancer remain to be defined. This study evaluated the antitumor effects of glycitein on human gastric cancer cells and investigated the underlying mechanisms. We used MTT assay, flow cytometry and western blotting to investigate its molecular mechanisms with focus on reactive oxygen species (ROS) production. Our results showed that glycitein had significant cytotoxic effects on human gastric cancer cells. Glycitein markedly decreased mitochondrial transmembrane potential (ΔΨm) and increased AGS cells mitochondrial-related apoptosis, and caused G0/G1 cell cycle arrest by regulating cycle-related protein. Mechanistically, accompanying ROS, glycitein can activate mitogen-activated protein kinase (MAPK) and inhibited the signal transducer and activator of transcription 3 (STAT3) and nuclear factor-kappaB (NF-κB) signaling pathways. Furthermore, the MAPK signaling pathway regulated the expression levels of STAT3 and NF-κB upon treatment with MAPK inhibitor and N-acetyl-L-cysteine (NAC). These findings suggested that glycitein induced AGS cell apoptosis and G0/G1 phase cell cycle arrest via ROS-related MAPK/STAT3/NF-κB signaling pathways. Thus, glycitein has the potential to a novel targeted therapeutic agent for human gastric cancer.
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Affiliation(s)
- Yan-Qing Zang
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Yan-Yu Feng
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Ying-Hua Luo
- Department of Grass Science, College of Animal Science & Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Yu-Qing Zhai
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Xue-Ying Ju
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Yu-Chao Feng
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Jia-Ru Wang
- Department of Biochemistry and Molecular Biology, College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Chang-Qing Yu
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Cheng-Hao Jin
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China.,Department of Biochemistry and Molecular Biology, College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
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Askvig JM, Watt JA. Absence of axonal sprouting following unilateral lesion in 125-day-old rat supraoptic nucleus may be due to age-dependent decrease in protein levels of ciliary neurotrophic factor receptor alpha. J Comp Neurol 2019; 527:2291-2301. [PMID: 30861131 DOI: 10.1002/cne.24675] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 02/28/2019] [Accepted: 03/04/2019] [Indexed: 02/04/2023]
Abstract
Within the supraoptic nucleus (SON) of a 35-day-old rat, we previously demonstrated a collateral sprouting response that reinnervates the partially denervated neural lobe (NL) after unilateral lesion of the hypothalamo-neurohypophysial tract. Others have shown a decreased propensity for axonal sprouting in an aged brain; therefore, to see if the SON exhibits a decreased propensity for axonal sprouting as the animal ages, we performed a unilateral lesion in the 125-day-old rat SON. Ultrastructural analysis of axon profiles in the NL of the 125-day-old rat demonstrated an absence of axonal sprouting following injury. We previously demonstrated that ciliary neurotrophic factor (CNTF) promotes process outgrowth from injured magnocellular neuron axons in vitro. Thus, we hypothesized that the lack of axonal sprouting in the 125-day-old rat SON may be due to a reduction in CNTF or the CNTF receptor components. To this point, we found that as the rat ages there is significantly less CNTF receptor alpha (CNTFRα) protein in the uninjured, 125-day-old rat compared to the uninjured, 35-day-old rat. We also observed that protein levels of CNTF and the CNTF receptor components were increased in the SON and NL following injury in the 35-day-old rat, but there was no difference in the protein levels in the 125-day-old rat. Altogether, the results presented herein demonstrate that the plasticity within the SON is highly dependent on the age of the rat, and that a decrease in CNTFRα protein levels in the 125-day-old rat may contribute to the loss of axonal sprouting following axotomy.
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Affiliation(s)
- Jason M Askvig
- Department of Biology, Concordia College, Moorhead, Minnesota
| | - John A Watt
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, North Dakota
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Delplace V, Ortin-Martinez A, Tsai ELS, Amin AN, Wallace V, Shoichet MS. Controlled release strategy designed for intravitreal protein delivery to the retina. J Control Release 2019; 293:10-20. [DOI: 10.1016/j.jconrel.2018.11.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 11/05/2018] [Accepted: 11/09/2018] [Indexed: 12/25/2022]
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Samy ZA, Al-Abdullah L, Turcani M, Craik J, Redzic Z. Rat astrocytes during anoxia: Secretome profile of cytokines and chemokines. Brain Behav 2018; 8:e01013. [PMID: 29863786 PMCID: PMC6043693 DOI: 10.1002/brb3.1013] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/25/2018] [Accepted: 05/06/2018] [Indexed: 12/20/2022] Open
Abstract
INTRODUCTION The precise mechanisms of the inflammatory responses after cerebral ischemia in vivo are difficult to elucidate because of the complex nature of multiple series of interactions between cells and molecules. This study explored temporal patterns of secretion of 30 cytokines and chemokines from Sprague Dawley rat astrocytes in primary culture in order to elucidate signaling pathways that are triggered by astrocytes during anoxia. METHODS Primary cultures of rat brain astrocytes were incubated for periods of 2-24 hr in the absence of oxygen (anoxia) or under normal partial pressure of oxygen (controls). Simultaneous detection of 29 cytokines and chemokines in the samples was performed using a rat cytokine array panel, while the temporal pattern of angiopoietin-1 (Ang-1) secretion was determined separately using ELISA. Wilcoxon-Mann-Whitney test was used to compare normoxic and anoxic samples and the Hodge-Lehman estimator with exact 95% confidence intervals was computed to assess the size of differences in cytokine secretion. The obtained data were imported into the Core Analysis tool of Ingenuity Pathways Analysis software in order to relate changes in secretion of cytokines and chemokines from astrocytes during anoxia to potential molecular signal networks. RESULTS With the exception of Ang-1, concentrations of all cytokines/chemokines in samples collected after anoxia exposure were either the same, or higher, than in control groups. No clear pattern of changes could be established for groups of cytokines with similar effects (i.e., pro- or anti-inflammatory cytokines). The pattern of changes in cytokine secretion during anoxia was associated with the HIF-1α-mediated response, as well as cytokines IL-1β and cathepsin S pathways, which are related to initiation of inflammation and antigen presentation, respectively, and to ciliary neurotrophic factor. CONCLUSIONS These in vitro findings suggest that astrocytes may play a role in triggering inflammation during anoxia/ischemia of the brain.
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Affiliation(s)
- Zeinab Adel Samy
- Faculty of Medicine, Department of Physiology, Kuwait University, Kuwait, Kuwait
| | - Lulwa Al-Abdullah
- Faculty of Medicine, Department of Physiology, Kuwait University, Kuwait, Kuwait
| | - Marian Turcani
- Faculty of Medicine, Department of Physiology, Kuwait University, Kuwait, Kuwait
| | - James Craik
- Faculty of Medicine, Department of Biochemistry, Kuwait University, Kuwait, Kuwait
| | - Zoran Redzic
- Faculty of Medicine, Department of Physiology, Kuwait University, Kuwait, Kuwait
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Ghasemi M, Alizadeh E, Saei Arezoumand K, Fallahi Motlagh B, Zarghami N. Ciliary neurotrophic factor (CNTF) delivery to retina: an overview of current research advancements. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:1694-1707. [PMID: 29065723 DOI: 10.1080/21691401.2017.1391820] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The intraocular administration of the ciliary neurotrophic factor (CNTF) has been found to attenuate the photoreceptor degeneration and preserve retinal functions in the animal research models of the inherited or induced retinal disease. Studies with the aim of CNTF transfer to the posterior segment inside the eye have been directed to determine the best method for its administration. An ideal delivery method would overcome the eye drug elimination mechanisms or barriers and provide the sustained release of the CNTF into retina in the safest fashion with the minimum harm to the quality of life. This review focuses on the present state of CNTF delivery to retina, also provides an overview of available technologies and their challenges.
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Affiliation(s)
- Maryam Ghasemi
- a The Umbilical Cord Stem Cell Research Center (UCSRC) , Tabriz University of Medical Sciences , Tabriz , Iran.,b Department of Medical Biotechnology, Faculty of Advanced Medical Sciences , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Effat Alizadeh
- a The Umbilical Cord Stem Cell Research Center (UCSRC) , Tabriz University of Medical Sciences , Tabriz , Iran.,b Department of Medical Biotechnology, Faculty of Advanced Medical Sciences , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Khatereh Saei Arezoumand
- b Department of Medical Biotechnology, Faculty of Advanced Medical Sciences , Tabriz University of Medical Sciences , Tabriz , Iran
| | | | - Nosratollah Zarghami
- a The Umbilical Cord Stem Cell Research Center (UCSRC) , Tabriz University of Medical Sciences , Tabriz , Iran.,b Department of Medical Biotechnology, Faculty of Advanced Medical Sciences , Tabriz University of Medical Sciences , Tabriz , Iran.,d Department of Clinical Biochemistry and Laboratory Medicine, Faculty of Medicine , Tabriz University of Medical Sciences , Tabriz , Iran
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16
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Lynds R, Lyu C, Lyu GW, Shi XQ, Rosén A, Mustafa K, Shi TJS. Neuronal plasticity of trigeminal ganglia in mice following nerve injury. J Pain Res 2017; 10:349-357. [PMID: 28223844 PMCID: PMC5310634 DOI: 10.2147/jpr.s120092] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Background Nerve injury may induce neuropathic pain. In studying the mechanisms of orofacial neuropathic pain, attention has been paid to the plastic changes that occur in the trigeminal ganglia (TGs) and nucleus in response to an injury of the trigeminal nerve branches. Previous studies have explored the impact of sciatic nerve injury on dorsal root ganglia (DRGs) and it has shown dramatic changes in the expression of multiple biomarkers. In large, the changes in biomarker expression in TGs after trigeminal nerve injury are similar to that in DRGs after sciatic nerve injury. However, important differences exist. Therefore, there is a need to study the plasticity of biomarkers in TGs after nerve injury in the context of the development of neuropathic pain-like behaviors. Aim The aim of this study was to investigate the plasticity of biomarkers associated with chronic persistent pain in TGs after trigeminal nerve injury. Materials and methods To mimic the chronic nature of the disorder, we used an intraoral procedure to access the infraorbital nerve (ION) and induced a nerve injury in mice. Immunohistochemistry and quantification were used for revealing the expression level of each biomarker in TGs after nerve injury. Results Two weeks after partial ION injury, immunohistochemistry results showed strongly upregulated expressions of activating transcription factor 3 and neuropeptide Y (NPY) in the ipsilateral TGs. Microglial cells were also activated after nerve injury. In regard to positive neuronal profile counting, however, no significant difference in expression was observed in galanin, substance P, calcitonin gene-related peptide, neuronal nitric oxide synthase, phosphorylated AKT, or P2X3 in ipsilateral TGs when compared to contralateral TGs. Conclusion In this study, the expression and regulation of biomarkers in TGs have been observed in response to trigeminal nerve injury. Our results suggest that NPY and Iba1 might play crucial roles in the pathogenesis of orofacial neuropathic pain following this type of injury. Further investigations on the relevance of these changes may help to target suitable treatment possibilities for trigeminal neuralgia.
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Affiliation(s)
- Randi Lynds
- Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden; Division of Oral and Maxillofacial Radiology, Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway
| | - Chuang Lyu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences
| | - Gong-Wei Lyu
- Department of Neurology, The First Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - Xie-Qi Shi
- Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden; Division of Oral and Maxillofacial Radiology, Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway
| | - Annika Rosén
- Division for Oral and Maxillofacial Surgery; Tissue Engineering Group, Department of Clinical Dentistry, Faculty of Medicine and Dentistry
| | - Kamal Mustafa
- Tissue Engineering Group, Department of Clinical Dentistry, Faculty of Medicine and Dentistry
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Regulation of Stem Cell Properties of Müller Glia by JAK/STAT and MAPK Signaling in the Mammalian Retina. Stem Cells Int 2017; 2017:1610691. [PMID: 28194183 PMCID: PMC5282447 DOI: 10.1155/2017/1610691] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 12/21/2016] [Indexed: 12/15/2022] Open
Abstract
In humans and other mammals, the neural retina does not spontaneously regenerate, and damage to the retina that kills retinal neurons results in permanent blindness. In contrast to embryonic stem cells, induced pluripotent stem cells, and embryonic/fetal retinal stem cells, Müller glia offer an intrinsic cellular source for regenerative strategies in the retina. Müller glia are radial glial cells within the retina that maintain retinal homeostasis, buffer ion flux associated with phototransduction, and form the blood/retinal barrier within the retina proper. In injured or degenerating retinas, Müller glia contribute to gliotic responses and scar formation but also show regenerative capabilities that vary across species. In the mammalian retina, regenerative responses achieved to date remain insufficient for potential clinical applications. Activation of JAK/STAT and MAPK signaling by CNTF, EGF, and FGFs can promote proliferation and modulate the glial/neurogenic switch. However, to achieve clinical relevance, additional intrinsic and extrinsic factors that restrict or promote regenerative responses of Müller glia in the mammalian retina must be identified. This review focuses on Müller glia and Müller glial-derived stem cells in the retina and phylogenetic differences among model vertebrate species and highlights some of the current progress towards understanding the cellular mechanisms regulating their regenerative response.
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Gu YL, Gao GQ, Ma N, Ye LL, Zhang LW, Gao X, Zhang ZB. CNTF protects neurons from hypoxic injury through the activation of STAT3pTyr705. Int J Mol Med 2016; 38:1915-1921. [DOI: 10.3892/ijmm.2016.2769] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 09/21/2016] [Indexed: 11/06/2022] Open
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Barbon S, Stocco E, Negro A, Dalzoppo D, Borgio L, Rajendran S, Grandi F, Porzionato A, Macchi V, De Caro R, Parnigotto PP, Grandi C. In vitro assessment of TAT - Ciliary Neurotrophic Factor therapeutic potential for peripheral nerve regeneration. Toxicol Appl Pharmacol 2016; 309:121-8. [PMID: 27597256 DOI: 10.1016/j.taap.2016.09.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 08/31/2016] [Accepted: 09/01/2016] [Indexed: 11/18/2022]
Abstract
In regenerative neurobiology, Ciliary Neurotrophic Factor (CNTF) is raising high interest as a multifunctional neurocytokine, playing a key role in the regeneration of injured peripheral nerves. Despite its promising trophic and regulatory activity, its clinical application is limited by the onset of severe side effects, due to the lack of efficient intracellular trafficking after administration. In this study, recombinant CNTF linked to the transactivator transduction domain (TAT) was investigated in vitro and found to be an optimized fusion protein which preserves neurotrophic activity, besides enhancing cellular uptake for therapeutic advantage. Moreover, a compelling protein delivery method was defined, in the future perspective of improving nerve regeneration strategies. Following determination of TAT-CNTF molecular weight and concentration, its specific effect on neural SH-SY5Y and PC12 cultures was assessed. Cell proliferation assay demonstrated that the fusion protein triggers PC12 cell growth within 6h of stimulation. At the same time, the activation of signal transduction pathway and enhancement of cellular trafficking were found to be accomplished in both neural cell lines after specific treatment with TAT-CNTF. Finally, the recombinant growth factor was successfully loaded on oxidized polyvinyl alcohol (PVA) scaffolds, and more efficiently released when polymer oxidation rate increased. Taken together, our results highlight that the TAT domain addiction to the protein sequence preserves CNTF specific neurotrophic activity in vitro, besides improving cellular uptake. Moreover, oxidized PVA could represent an ideal biomaterial for the development of nerve conduits loaded with the fusion protein to be delivered to the site of nerve injury.
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Affiliation(s)
- Silvia Barbon
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Via Marzolo 5, 35131 Padua, Italy; Foundation for Biology and Regenerative Medicine, Tissue Engineering and Signaling (TES) ONLUS, Via De Sanctis 10, Caselle di Selvazzano Dentro, 35030 Padua, Italy.
| | - Elena Stocco
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Via Marzolo 5, 35131 Padua, Italy; Foundation for Biology and Regenerative Medicine, Tissue Engineering and Signaling (TES) ONLUS, Via De Sanctis 10, Caselle di Selvazzano Dentro, 35030 Padua, Italy.
| | - Alessandro Negro
- Department of Biomedical Sciences, University of Padova, Via Colombo 3, 35121 Padua, Italy.
| | - Daniele Dalzoppo
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Via Marzolo 5, 35131 Padua, Italy.
| | - Luca Borgio
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Via Marzolo 5, 35131 Padua, Italy.
| | - Senthilkumar Rajendran
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Via Marzolo 5, 35131 Padua, Italy.
| | - Francesca Grandi
- Department of Women's and Children's Health, Pediatric Surgery, University of Padua, Via Giustiniani 3, 35121 Padua, Italy.
| | - Andrea Porzionato
- Section of Human Anatomy, Department of Molecular Medicine, University of Padua, Via Gabelli 65, 35121 Padua, Italy.
| | - Veronica Macchi
- Section of Human Anatomy, Department of Molecular Medicine, University of Padua, Via Gabelli 65, 35121 Padua, Italy.
| | - Raffaele De Caro
- Section of Human Anatomy, Department of Molecular Medicine, University of Padua, Via Gabelli 65, 35121 Padua, Italy.
| | - Pier Paolo Parnigotto
- Foundation for Biology and Regenerative Medicine, Tissue Engineering and Signaling (TES) ONLUS, Via De Sanctis 10, Caselle di Selvazzano Dentro, 35030 Padua, Italy.
| | - Claudio Grandi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Via Marzolo 5, 35131 Padua, Italy.
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Wootla B, Denic A, Warrington AE, Rodriguez M. A monoclonal natural human IgM protects axons in the absence of remyelination. J Neuroinflammation 2016; 13:94. [PMID: 27126523 PMCID: PMC4850699 DOI: 10.1186/s12974-016-0561-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 04/24/2016] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Whereas demyelination underlies early neurological symptoms in multiple sclerosis (MS), axonal damage is considered critical for permanent chronic deficits. Intracerebral infection of susceptible mouse strains with Theiler's murine encephalomyelitis virus (TMEV) results in chronic induced demyelinating disease (TMEV-IDD) with progressive axonal loss and neurologic dysfunction similar to progressive forms of MS. We previously reported that treatment of chronic TMEV-IDD mice with a neurite outgrowth-promoting natural human antibody, HIgM12, improved brainstem NAA concentrations and preserved functional motor activity. In order to translate this antibody toward clinical trial, we generated a fully human recombinant form of HIgM12, rHIgM12, determined the optimal in vivo dose for functional improvement in TMEV-IDD, and evaluated the functional preservation of descending spinal cord axons by retrograde labeling. FINDINGS SJL/J mice at 45 to 90 days post infection (dpi) were studied. A single intraperitoneal dose of 0.25 mg/kg of rHIgM12 per mouse is sufficient to preserve motor function in TMEV-IDD. The optimal dose was 10 mg/kg. rHIgM12 treatment protected the functional transport in spinal cord axons and led to 40 % more Fluoro-Gold-labeled brainstem neurons in retrograde transport studies. This suggests that axons are not only present but also functionally competent. rHIgM12-treated mice also contained more mid-thoracic (T6) spinal cord axons than controls. CONCLUSIONS This study confirms that a fully human recombinant neurite outgrowth-promoting monoclonal IgM is therapeutic in a model of progressive MS using multiple reparative readouts. The minimum effective dose is similar to that of a remyelination-promoting monoclonal human IgM discovered by our group that is presently in clinical trials for MS.
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Affiliation(s)
- Bharath Wootla
- Department of Neurology, Mayo Clinic College of Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.,Mayo Clinic Center for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.,Center for Regenerative Medicine, Neuroregeneration, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Aleksandar Denic
- Department of Neurology, Mayo Clinic College of Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.,Mayo Clinic Center for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Arthur E Warrington
- Department of Neurology, Mayo Clinic College of Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.,Mayo Clinic Center for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Moses Rodriguez
- Department of Neurology, Mayo Clinic College of Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA. .,Mayo Clinic Center for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA. .,Department of Immunology, Mayo Clinic College of Medicine, Mayo Clinic, 200 1st Street SW, Rochester, MN, 55905, USA.
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Sun M, Liu H, Min S, Wang H, Wang X. Ciliary neurotrophic factor-treated astrocyte-conditioned medium increases the intracellular free calcium concentration in rat cortical neurons. Biomed Rep 2016; 4:417-420. [PMID: 27073624 DOI: 10.3892/br.2016.602] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 02/03/2016] [Indexed: 11/06/2022] Open
Abstract
Ciliary neurotrophic factor (CNTF) is involved in the activation of astrocytes. A previous study showed that CNTF-treated astrocyte-conditioned medium (CNTF-ACM) contributed to the increase of the calcium current and the elevation of corresponding ion channels in cortical neurons. On this basis, it is reasonable to assume that CNTF-ACM may increase the intracellular free calcium concentration ([Ca2+]i) in neurons. In the present study, the effects of CNTF-ACM on [Ca2+]i in rat cortical neurons were determined, and on this basis, the aim was to investigate the potential active ingredients in ACM that are responsible for this biological process. As expected, the data indicated that CNTF-ACM resulted in a clear elevation of [Ca2+]i in neurons. Additionally, the fibroblast growth factor-2 (FGF-2) contained in the CNTF-ACM was found to participate in the upregulation of [Ca2+]i. Taken together, CNTF induces the production of active factors (at least including FGF-2) released from astrocytes, which finally potentiate the increase of [Ca2+]i in cortical neurons.
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Affiliation(s)
- Meiqun Sun
- Anhui Clinical and Preclinical Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233030, P.R. China; Department of Histology and Embryology, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Hongli Liu
- Department of Gynecological Oncology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Shengping Min
- Anhui Clinical and Preclinical Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Hongtao Wang
- Department of Immunology, Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
| | - Xiaojing Wang
- Anhui Clinical and Preclinical Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233030, P.R. China
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Pasquin S, Sharma M, Gauchat JF. Ciliary neurotrophic factor (CNTF): New facets of an old molecule for treating neurodegenerative and metabolic syndrome pathologies. Cytokine Growth Factor Rev 2015; 26:507-15. [PMID: 26187860 DOI: 10.1016/j.cytogfr.2015.07.007] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 07/01/2015] [Indexed: 12/13/2022]
Abstract
Ciliary neurotrophic factor (CNTF) is the most extensively studied member of the cytokine family that signal through intracellular chains of the gp130/LIFRβ receptor. The severe phenotype in patients suffering from mutations inactivating LIFRβ indicates that members of this cytokine family play key, non-redundant roles during development. Accordingly, three decades of research has revealed potent and promising trophic and regulatory activities of CNTF in neurons, oligodendrocytes, muscle cells, bone cells, adipocytes and retinal cells. These findings led to clinical trials to test the therapeutic potential of CNTF and CNTF derivatives for treating neurodegenerative and metabolic diseases. Promising results have encouraged continuation of studies for treating retinal degenerative diseases. Results of some clinical trials showed that side-effects may limit the systemically administrated doses of CNTF. Therefore, therapies being currently tested rely on local delivery of CNTF using encapsulated cytokine-secreting implants. Since the side effects of CNTF might be linked to its ability to activate the alternative IL6Rα-LIFRβ-gp130 receptor, CNTFR-specific mutants of CNTF have been developed that bind to the CNTFRα-LIFRβ-gp130 receptor. These developments may prove to be a breakthrough for therapeutic applications of systemically administered CNTF in pathologies such as multiple sclerosis or Alzheimer's disease. The "designer cytokine approach" offers future opportunities to further enhance specificity by conjugating mutant CNTF with modified soluble CNTFRα to target therapeutically relevant cells that express gp130-LIFRβ and a specific cell surface marker.
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Affiliation(s)
- Sarah Pasquin
- Département de Pharmacologie, Université de Montréal, 2900 Édouard Montpetit, Montreal, QC H3T 1J4, Canada
| | - Mukut Sharma
- Renal Division, KCVA Medical Center, 4801 Linwood Blvd, Kansas City, MO 64128, USA
| | - Jean-François Gauchat
- Département de Pharmacologie, Université de Montréal, 2900 Édouard Montpetit, Montreal, QC H3T 1J4, Canada.
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