1
|
Pereira VA, da Silva HNM, Fernandes EM, Minatel E. LED therapy modulates M1/M2 macrophage phenotypes and mitigates dystrophic features in treadmill-trained mdx mice. Photochem Photobiol Sci 2024:10.1007/s43630-024-00626-2. [PMID: 39227554 DOI: 10.1007/s43630-024-00626-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Accepted: 08/21/2024] [Indexed: 09/05/2024]
Abstract
The mdx mouse phenotype, aggravated by chronic exercise on a treadmill, makes this murine model more reliable for the study of Duchenne muscular dystrophy (DMD) and allows the efficacy of therapeutic interventions to be evaluated. This study aims to investigate the effects of photobiomodulation by light-emitting diode (LED) therapy on functional, biochemical and morphological parameters in treadmill-trained adult mdx animals. Mdx mice were trained for 30 min of treadmill running at a speed of 12 m/min, twice a week for 4 weeks. The LED therapy (850 nm) was applied twice a week to the quadriceps muscle throughout the treadmill running period. LED therapy improved behavioral activity (open field) and muscle function (grip strength and four limb hanging test). Functional benefits correlated with reduced muscle damage; a decrease in the inflammatory process; modulation of the regenerative muscular process and calcium signalling pathways; and a decrease in oxidative stress markers. The striking finding of this work is that LED therapy leads to a shift from the M1 to M2 macrophage phenotype in the treadmill-trained mdx mice, enhancing tissue repair and mitigating the dystrophic features. Our data also imply that the beneficial effects of LED therapy in the dystrophic muscle correlate with the interplay between calcium, oxidative stress and inflammation signalling pathways. Together, these results suggest that photobiomodulation could be a potential adjuvant therapy for dystrophinopathies.
Collapse
Affiliation(s)
- Valéria Andrade Pereira
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, 13083-970, Brazil
| | - Heloina Nathalliê Mariano da Silva
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, 13083-970, Brazil
| | - Evelyn Mendes Fernandes
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, 13083-970, Brazil
| | - Elaine Minatel
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, 13083-970, Brazil.
| |
Collapse
|
2
|
Verhaeg M, Adamzek K, van de Vijver D, Putker K, Engelbeen S, Wijnbergen D, Overzier M, Suidgeest E, van der Weerd L, Aartsma‐Rus A, van Putten M. Learning, memory and blood-brain barrier pathology in Duchenne muscular dystrophy mice lacking Dp427, or Dp427 and Dp140. GENES, BRAIN, AND BEHAVIOR 2024; 23:e12895. [PMID: 38837620 PMCID: PMC11151035 DOI: 10.1111/gbb.12895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/22/2024] [Accepted: 03/28/2024] [Indexed: 06/07/2024]
Abstract
Duchenne muscular dystrophy is a severe neuromuscular disorder that is caused by mutations in the DMD gene, resulting in a disruption of dystrophin production. Next to dystrophin expression in the muscle, different isoforms of the protein are also expressed in the brain and lack of these isoforms leads to cognitive and behavioral deficits in patients. It remains unclear how the loss of the shorter dystrophin isoform Dp140 affects these processes. Using a variety of behavioral tests, we found that mdx and mdx4cv mice (which lack Dp427 or Dp427 + Dp140, respectively) exhibit similar deficits in working memory, movement patterns and blood-brain barrier integrity. Neither model showed deficits in spatial learning and memory, learning flexibility, anxiety or spontaneous behavior, nor did we observe differences in aquaporin 4 and glial fibrillary acidic protein. These results indicate that in contrast to Dp427, Dp140 does not play a crucial role in processes of learning, memory and spontaneous behavior.
Collapse
Affiliation(s)
- Minou Verhaeg
- Department of Human GeneticsLeiden University Medical CenterLeidenThe Netherlands
| | - Kevin Adamzek
- Department of Human GeneticsLeiden University Medical CenterLeidenThe Netherlands
| | - Davy van de Vijver
- Department of Human GeneticsLeiden University Medical CenterLeidenThe Netherlands
| | - Kayleigh Putker
- Department of Human GeneticsLeiden University Medical CenterLeidenThe Netherlands
| | - Sarah Engelbeen
- Department of Human GeneticsLeiden University Medical CenterLeidenThe Netherlands
| | - Daphne Wijnbergen
- Department of Human GeneticsLeiden University Medical CenterLeidenThe Netherlands
| | - Maurice Overzier
- Department of Human GeneticsLeiden University Medical CenterLeidenThe Netherlands
| | - Ernst Suidgeest
- C.J. Gorter MRI Center, Department of RadiologyLeiden University Medical CenterLeidenThe Netherlands
| | - Louise van der Weerd
- Department of Human GeneticsLeiden University Medical CenterLeidenThe Netherlands
- C.J. Gorter MRI Center, Department of RadiologyLeiden University Medical CenterLeidenThe Netherlands
| | | | - Maaike van Putten
- Department of Human GeneticsLeiden University Medical CenterLeidenThe Netherlands
| |
Collapse
|
3
|
Zarrouki F, Relizani K, Bizot F, Tensorer T, Garcia L, Vaillend C, Goyenvalle A. Partial restoration of brain dystrophin and behavioral deficits by exon skipping in the muscular dystrophy X-linked (mdx) mouse. Ann Neurol 2022; 92:213-229. [PMID: 35587226 PMCID: PMC9544349 DOI: 10.1002/ana.26409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 05/13/2022] [Accepted: 05/17/2022] [Indexed: 11/08/2022]
Abstract
Objectives Duchenne muscular dystrophy is associated with various degrees of cognitive impairment and behavioral disturbances. Emotional and memory deficits also constitute reliable outcome measures to assess efficacy of treatments in the mdx mouse lacking the muscle and neuronal full‐length dystrophins. The present study aimed to evaluate whether these deficits could be alleviated by the restoration of brain dystrophin. Methods We performed intracerebroventricular administration of a new potent tricyclo‐DNA antisense oligonucleotide (tcDNA‐ASO) containing a full phosphodiester backbone conjugated to a palmitic acid moiety (tcDNA‐ASO), designed to skip the mutated exon 23 of mdx mice. Results We first show that the tcDNA‐ASO rescues expression of brain dystrophin to 10–30% of wild‐type levels and significantly reduces the abnormal unconditioned fear responses in mdx mice in a dose‐dependent manner, 5 weeks post‐injection. Exon skipping efficiency, ASO biodistribution, protein restoration and effect on the fear response were optimal with a dose of 400 μg at 6–7 weeks post‐injection, with synaptic‐like expression in brain tissues such as the hippocampus and amygdala. Furthermore, this dose of tcDNA‐ASO restored long‐term memory retention of mdx mice in an object recognition task, but only had minor effects on fear conditioning. Interpretation These results suggest for the first time that postnatal re‐expression of brain dystrophin could reverse or at least alleviate some cognitive deficits associated with Duchenne muscular dystrophy. ANN NEUROL 2022;92:213–229
Collapse
Affiliation(s)
- Faouzi Zarrouki
- Université Paris-Saclay, UVSQ, Inserm, END-ICAP, 78000, Versailles, France.,Université Paris-Saclay, CNRS, Institut des Neurosciences Paris Saclay, 91400, Saclay, France
| | - Karima Relizani
- Université Paris-Saclay, UVSQ, Inserm, END-ICAP, 78000, Versailles, France.,SQY Therapeutics, UVSQ, 78180, Montigny le Bretonneux, France
| | - Flavien Bizot
- Université Paris-Saclay, UVSQ, Inserm, END-ICAP, 78000, Versailles, France
| | - Thomas Tensorer
- SQY Therapeutics, UVSQ, 78180, Montigny le Bretonneux, France
| | - Luis Garcia
- Université Paris-Saclay, UVSQ, Inserm, END-ICAP, 78000, Versailles, France.,LIA BAHN, centre scientifique de Monaco, 98000, Monaco
| | - Cyrille Vaillend
- Université Paris-Saclay, CNRS, Institut des Neurosciences Paris Saclay, 91400, Saclay, France
| | - Aurélie Goyenvalle
- Université Paris-Saclay, UVSQ, Inserm, END-ICAP, 78000, Versailles, France.,LIA BAHN, centre scientifique de Monaco, 98000, Monaco
| |
Collapse
|
4
|
Deficiency of Glycosylated α-Dystroglycan in Ventral Hippocampus Bridges the Destabilization of Gamma-Aminobutyric Acid Type A Receptors With the Depressive-like Behaviors of Male Mice. Biol Psychiatry 2022; 91:593-603. [PMID: 35063187 DOI: 10.1016/j.biopsych.2021.10.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 10/14/2021] [Accepted: 10/14/2021] [Indexed: 01/09/2023]
Abstract
BACKGROUND Depression is a common psychiatric disorder associated with defects in GABAergic (gamma-aminobutyric acidergic) neurotransmission. α-Dystroglycan (α-DG), a cell adhesion molecule known to be essential for skeletal muscle integrity, is also present at inhibitory synapses in the central nervous system and forms a structural element in certain synapses. However, the role of α-DG in the regulation of depressive-like behaviors remains largely unknown. METHODS Depressive-like behaviors were induced by chronic social defeat stress in adult male mice. Surface protein was extracted by a biotin kit, and the expression of protein was detected by Western blotting. Intrahippocampal microinjection of the lentivirus or adeno-associated virus or agrin intervention was carried out using a stereotaxic instrument and followed by behavioral tests. Miniature inhibitory postsynaptic currents were recorded by whole-cell patch-clamp techniques. RESULTS The expression of α-DG and glycosylated α-DG in the ventral hippocampus was significantly lower in chronic social defeat stress-susceptible male mice than in control mice, accompanied by a decreased surface expression of GABAA receptor γ2 subunit and reduced GABAergic neurotransmission. RNA interference-mediated knockdown of Dag1 increased the susceptibility of mice to subthreshold stress. Both in vivo administration of agrin and overexpression of like-acetylglucosaminyltransferase ameliorated depressive-like behaviors and restored the decrease in surface expression of GABAA receptor γ2 subunit and the amplitude of miniature inhibitory postsynaptic currents in chronic social defeat stress-exposed mice. CONCLUSIONS Our findings demonstrate that glycosylated α-DG plays a role in the pathophysiological process of depressive-like behaviors by regulating the surface expression of GABAA receptor γ2 subunit and GABAergic neurotransmission in the ventral hippocampus.
Collapse
|
5
|
Gartz M, Haberman M, Prom MJ, Beatka MJ, Strande JL, Lawlor MW. A Long-Term Study Evaluating the Effects of Nicorandil Treatment on Duchenne Muscular Dystrophy-Associated Cardiomyopathy in mdx Mice. J Cardiovasc Pharmacol Ther 2022; 27:10742484221088655. [PMID: 35353647 DOI: 10.1177/10742484221088655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Duchenne muscular dystrophy (DMD) is a neuromuscular disease caused by dystrophin gene mutations affecting striated muscle. Due to advances in skeletal muscle treatment, cardiomyopathy has emerged as a leading cause of death. Previously, nicorandil, a drug with antioxidant and nitrate-like properties, ameliorated cardiac damage and improved cardiac function in young, injured mdx mice. Nicorandil mitigated damage by stimulating antioxidant activity and limiting pro-oxidant expression. Here, we examined whether nicorandil was similarly cardioprotective in aged mdx mice. METHODS AND RESULTS Nicorandil (6 mg/kg) was given over 15 months. Echocardiography of mdx mice showed some functional defects at 12 months compared to wild-type (WT) mice, but not at 15 months. Disease manifestation was evident in mdx mice via treadmill assays and survival, but not open field and grip strength assays. Cardiac levels of SOD2 and NOX4 were decreased in mdx vs. WT. Nicorandil increased survival in mdx but did not alter cardiac function, fibrosis, diaphragm function or muscle fatigue. CONCLUSIONS In contrast to our prior work in young, injured mdx mice, nicorandil did not exert cardioprotective effects in 15 month aged mdx mice. Discordant findings may be explained by the lack of cardiac disease manifestation in aged mdx mice compared to WT, whereas significant cardiac dysfunction was previously seen with the sub-acute injury in young mice. Therefore, we are not able to conclude any cardioprotective effects with long-term nicorandil treatment in aging mdx mice.
Collapse
Affiliation(s)
- Melanie Gartz
- Department of Cell Biology, Neurobiology and Anatomy, 5506Medical College of Wisconsin, Milwaukee, WI, USA.,Cardiovascular Research Center, 5506Medical College of Wisconsin, Milwaukee, WI, USA.,Neuroscience Research Center, 5506Medical College of Wisconsin, Milwaukee, WI, USA.,Department of Pathology and Laboratory Medicine, 5506Medical College of Wisconsin, Milwaukee, WI, USA
| | - Margaret Haberman
- Cardiovascular Research Center, 5506Medical College of Wisconsin, Milwaukee, WI, USA.,Neuroscience Research Center, 5506Medical College of Wisconsin, Milwaukee, WI, USA.,Department of Pathology and Laboratory Medicine, 5506Medical College of Wisconsin, Milwaukee, WI, USA.,Department of Medicine, 5506Medical College of Wisconsin, Milwaukee, WI, USA
| | - Mariah J Prom
- Neuroscience Research Center, 5506Medical College of Wisconsin, Milwaukee, WI, USA.,Department of Pathology and Laboratory Medicine, 5506Medical College of Wisconsin, Milwaukee, WI, USA
| | - Margaret J Beatka
- Neuroscience Research Center, 5506Medical College of Wisconsin, Milwaukee, WI, USA.,Department of Pathology and Laboratory Medicine, 5506Medical College of Wisconsin, Milwaukee, WI, USA
| | - Jennifer L Strande
- Cardiovascular Research Center, 5506Medical College of Wisconsin, Milwaukee, WI, USA.,Department of Medicine, 5506Medical College of Wisconsin, Milwaukee, WI, USA
| | - Michael W Lawlor
- Neuroscience Research Center, 5506Medical College of Wisconsin, Milwaukee, WI, USA.,Department of Pathology and Laboratory Medicine, 5506Medical College of Wisconsin, Milwaukee, WI, USA
| |
Collapse
|
6
|
Acid sphingomyelinase promotes SGK1-dependent vascular calcification. Clin Sci (Lond) 2021; 135:515-534. [PMID: 33479769 PMCID: PMC7859357 DOI: 10.1042/cs20201122] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 01/07/2021] [Accepted: 01/21/2021] [Indexed: 12/20/2022]
Abstract
In chronic kidney disease (CKD), hyperphosphatemia is a key factor promoting medial vascular calcification, a common complication associated with cardiovascular events and high mortality. Vascular calcification involves osteo-/chondrogenic transdifferentiation of vascular smooth muscle cells (VSMCs), but the complex signaling events inducing pro-calcific pathways are incompletely understood. The present study investigated the role of acid sphingomyelinase (ASM)/ceramide as regulator of VSMC calcification. In vitro, both, bacterial sphingomyelinase and phosphate increased ceramide levels in VSMCs. Bacterial sphingomyelinase as well as ceramide supplementation stimulated osteo-/chondrogenic transdifferentiation during control and high phosphate conditions and augmented phosphate-induced calcification of VSMCs. Silencing of serum- and glucocorticoid-inducible kinase 1 (SGK1) blunted the pro-calcific effects of bacterial sphingomyelinase or ceramide. Asm deficiency blunted vascular calcification in a cholecalciferol-overload mouse model and ex vivo isolated-perfused arteries. In addition, Asm deficiency suppressed phosphate-induced osteo-/chondrogenic signaling and calcification of cultured VSMCs. Treatment with the functional ASM inhibitors amitriptyline or fendiline strongly blunted pro-calcific signaling pathways in vitro and in vivo. In conclusion, ASM/ceramide is a critical upstream regulator of vascular calcification, at least partly, through SGK1-dependent signaling. Thus, ASM inhibition by repurposing functional ASM inhibitors to reduce the progression of vascular calcification during CKD warrants further study.
Collapse
|
7
|
Saoudi A, Zarrouki F, Sebrié C, Izabelle C, Goyenvalle A, Vaillend C. Emotional behavior and brain anatomy of the mdx52 mouse model of Duchenne muscular dystrophy. Dis Model Mech 2021; 14:dmm049028. [PMID: 34546327 PMCID: PMC8476816 DOI: 10.1242/dmm.049028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 07/30/2021] [Indexed: 11/20/2022] Open
Abstract
The exon-52-deleted mdx52 mouse is a critical model of Duchenne muscular dystrophy (DMD), as it features a deletion in a hotspot region of the DMD gene, frequently mutated in patients. Deletion of exon 52 impedes expression of several brain dystrophins (Dp427, Dp260 and Dp140), thus providing a key model for studying the cognitive impairment associated with DMD and testing rescuing strategies. Here, using in vivo magnetic resonance imaging and neurohistology, we found no gross brain abnormalities in mdx52 mice, suggesting that the neural dysfunctions in this model are likely at the level of brain cellular functionalities. Then, we investigated emotional behavior and fear learning performance of mdx52 mice compared to mdx mice that only lack Dp427 to focus on behavioral phenotypes that could be used in future comparative preclinical studies. mdx52 mice displayed enhanced anxiety and a severe impairment in learning an amygdala-dependent Pavlovian association. These replicable behavioral outcome measures are reminiscent of the internalizing problems reported in a quarter of DMD patients, and will be useful for preclinical estimation of the efficacy of treatments targeting brain dysfunctions in DMD.
Collapse
Affiliation(s)
- Amel Saoudi
- Université Paris-Saclay, CNRS, Institut des Neurosciences Paris Saclay, 91190, Gif-sur-Yvette, France
- Université Paris-Saclay, UVSQ, Inserm, END-ICAP, 78000 Versailles, France
| | - Faouzi Zarrouki
- Université Paris-Saclay, CNRS, Institut des Neurosciences Paris Saclay, 91190, Gif-sur-Yvette, France
| | - Catherine Sebrié
- Université Paris-Saclay, CEA, CNRS, Inserm, BioMaps, Service Hospitalier Frédéric Joliot, 4 place du général Leclerc, 91401 Orsay, France
| | - Charlotte Izabelle
- Université Paris-Saclay, CNRS, Institut des Neurosciences Paris Saclay, 91190, Gif-sur-Yvette, France
| | - Aurélie Goyenvalle
- Université Paris-Saclay, UVSQ, Inserm, END-ICAP, 78000 Versailles, France
| | - Cyrille Vaillend
- Université Paris-Saclay, CNRS, Institut des Neurosciences Paris Saclay, 91190, Gif-sur-Yvette, France
| |
Collapse
|
8
|
Ellwood RA, Piasecki M, Szewczyk NJ. Caenorhabditis elegans as a Model System for Duchenne Muscular Dystrophy. Int J Mol Sci 2021; 22:ijms22094891. [PMID: 34063069 PMCID: PMC8125261 DOI: 10.3390/ijms22094891] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 04/26/2021] [Accepted: 04/26/2021] [Indexed: 02/07/2023] Open
Abstract
The nematode worm Caenorhabditis elegans has been used extensively to enhance our understanding of the human neuromuscular disorder Duchenne Muscular Dystrophy (DMD). With new arising clinically relevant models, technologies and treatments, there is a need to reconcile the literature and collate the key findings associated with this model.
Collapse
Affiliation(s)
- Rebecca A. Ellwood
- Medical Research Council (MRC) Versus Arthritis, Centre for Musculoskeletal Ageing Research, Royal Derby Hospital, University of Nottingham, Derby DE22 3DT, UK; (R.A.E.); (M.P.)
- National Institute for Health Research, Nottingham Biomedical Research Centre, Derby DE22 3DT, UK
| | - Mathew Piasecki
- Medical Research Council (MRC) Versus Arthritis, Centre for Musculoskeletal Ageing Research, Royal Derby Hospital, University of Nottingham, Derby DE22 3DT, UK; (R.A.E.); (M.P.)
- National Institute for Health Research, Nottingham Biomedical Research Centre, Derby DE22 3DT, UK
| | - Nathaniel J. Szewczyk
- Medical Research Council (MRC) Versus Arthritis, Centre for Musculoskeletal Ageing Research, Royal Derby Hospital, University of Nottingham, Derby DE22 3DT, UK; (R.A.E.); (M.P.)
- National Institute for Health Research, Nottingham Biomedical Research Centre, Derby DE22 3DT, UK
- Ohio Musculoskeletal and Neurologic Institute, Ohio University, Athens, OH 45701, USA
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, USA
- Correspondence:
| |
Collapse
|
9
|
Amitriptyline Downregulates Chronic Inflammatory Response to Biomaterial in Mice. Inflammation 2020; 44:580-591. [PMID: 33034827 DOI: 10.1007/s10753-020-01356-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 10/02/2020] [Indexed: 10/23/2022]
Abstract
Recent data has signaled that in addition to its therapeutic indications as antidepressant and analgesic, amitriptyline (AM) exerts anti-inflammatory effects in humans and experimental animal models of acute inflammation. We tested the hypothesis that this compound could also modulate the chronic inflammatory process induced by synthetic matrix in mice. Polyether-polyurethane sponge disks were implanted subcutaneously in 9-week-old male C57BL/6 mice. The animals received by oral gavage 5.0 mg/kg of amitriptyline for seven consecutive days in two treatment regimens. In the first series, the treatment was initiated on the day of surgery and the implants removed at day 7 post-implantation. For the assessment of the effect of amitriptyline on chronic inflammation, the treatment was initiated 7 days post-implantation and the sponge discs removed 14 after implantation. The inflammatory markers evaluated, myeloperoxidase - MPO, nitrite content, IL-6, IFN-γ, TNF-α, CXCL1 and CCL2 levels, and NF-κB transcription factor activation were reduced in implants when the treatment began 7 days post-implantation (chronic inflammation). In contrast, only mast cell number, MPO activity and activation of NF-κB pathway decreased when the treatment began soon after implantation (sub-acute inflammation) in 7-day old implants. The anti-inflammatory effects of amitriptyline described here, extend its range of actions as a potential agent able to attenuate long-term inflammatory processes.
Collapse
|
10
|
Spinazzola JM, Lambert MR, Gibbs DE, Conner JR, Krikorian GL, Pareek P, Rago C, Kunkel LM. Effect of serotonin modulation on dystrophin-deficient zebrafish. Biol Open 2020; 9:bio053363. [PMID: 32718931 PMCID: PMC7473644 DOI: 10.1242/bio.053363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 07/16/2020] [Indexed: 01/04/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) is a progressive muscle-wasting disease caused by mutation of the dystrophin gene. Pharmacological therapies that function independently of dystrophin and complement strategies aimed at dystrophin restoration could significantly improve patient outcomes. Previous observations have suggested that serotonin pathway modulation ameliorates dystrophic pathology, and re-application of serotonin modulators already used clinically would potentially hasten availability to DMD patients. In our study, we used dystrophin-deficient sapje and sapje-like zebrafish models of DMD for rapid and easy screening of several classes of serotonin pathway modulators as potential therapeutics. None of the candidate drugs tested significantly decreased the percentage of zebrafish exhibiting the dystrophic muscle phenotype in the short-term birefringence assay or lengthened the lifespan in the long-term survival assay. Although we did not identify an effective drug, we believe our data is of value to the DMD research community for future studies, and there is evidence that suggests serotonin modulation may still be a viable treatment strategy with further investigation. Given the widespread clinical use of selective serotonin reuptake inhibitors, tricyclic antidepressants and reversible inhibitors of monoamine oxidase, their reapplication to DMD is an attractive strategy in the field's pursuit to identify pharmacological therapies to complement dystrophin restoration strategies.
Collapse
Affiliation(s)
- Janelle M Spinazzola
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - Matthias R Lambert
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - Devin E Gibbs
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
| | - James R Conner
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
| | - Georgia L Krikorian
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
| | - Prithu Pareek
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
| | | | - Louis M Kunkel
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
- The Stem Cell Program, Boston Children's Hospital, Boston, MA, USA
- Harvard Stem Cell Institute, Cambridge, MA, USA
- The Manton Center for Orphan Disease Research at Boston Children's Hospital, Boston, MA, USA
| |
Collapse
|
11
|
Casarrubea M, Faulisi F, Raso G, Aiello S, Crescimanno G. Early alterations of the behavioural structure of mice affected by Duchenne muscular dystrophy and tested in open-field. Behav Brain Res 2020; 386:112609. [DOI: 10.1016/j.bbr.2020.112609] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 02/14/2020] [Accepted: 03/12/2020] [Indexed: 01/05/2023]
|
12
|
Caudal D, François V, Lafoux A, Ledevin M, Anegon I, Le Guiner C, Larcher T, Huchet C. Characterization of brain dystrophins absence and impact in dystrophin-deficient Dmdmdx rat model. PLoS One 2020; 15:e0230083. [PMID: 32160266 PMCID: PMC7065776 DOI: 10.1371/journal.pone.0230083] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 02/20/2020] [Indexed: 12/27/2022] Open
Abstract
Duchenne Muscular Dystrophy (DMD) is a severe muscle-wasting disease caused by mutations in the DMD gene encoding dystrophin, expressed mainly in muscles but also in other tissues like retina and brain. Non-progressing cognitive dysfunction occurs in 20 to 50% of DMD patients. Furthermore, loss of expression of the Dp427 dystrophin isoform in the brain of mdx mice, the most used animal model of DMD, leads to behavioral deficits thought to be linked to insufficiencies in synaptogenesis and channel clustering at synapses. Mdx mice where the locomotor phenotype is mild also display a high and maladaptive response to stress. Recently, we generated Dmdmdx rats carrying an out-of frame mutation in exon 23 of the DMD gene and exhibiting a skeletal and cardiac muscle phenotype similar to DMD patients. In order to evaluate the impact of dystrophin loss on behavior, we explored locomotion parameters as well as anhedonia, anxiety and response to stress, in Dmdmdx rats aged from 1.5 to 7 months, in comparison to wild-type (WT) littermates. Pattern of dystrophin expression in the brain of WT and Dmdmdx rats was characterized by western-blot analyses and immunohistochemistry. We showed that dystrophin-deficient Dmdmdx rats displayed motor deficits in the beam test, without association with depressive or anxiety-like phenotype. However, Dmdmdx rats exhibited a strong response to restraint-induced stress, with a large increase in freezings frequency and duration, suggesting an alteration in a functional circuit including the amygdala. In brain, large dystrophin isoform Dp427 was not expressed in mutant animals. Dmdmdx rat is therefore a good animal model for preclinical evaluations of new treatments for DMD but care must be taken with their responses to mild stress.
Collapse
Affiliation(s)
- Dorian Caudal
- Therassay Platform, CAPACITES, Université de Nantes, Nantes, France
- * E-mail:
| | - Virginie François
- Nantes Gene Therapy Laboratory, Université de Nantes, INSERM UMR 1089, Nantes, France
| | - Aude Lafoux
- Therassay Platform, CAPACITES, Université de Nantes, Nantes, France
| | | | | | - Caroline Le Guiner
- Nantes Gene Therapy Laboratory, Université de Nantes, INSERM UMR 1089, Nantes, France
| | | | - Corinne Huchet
- Therassay Platform, CAPACITES, Université de Nantes, Nantes, France
- Nantes Gene Therapy Laboratory, Université de Nantes, INSERM UMR 1089, Nantes, France
| |
Collapse
|
13
|
Bahr HI, Abdelghany AA, Galhom RA, Barakat BM, Arafa ESA, Fawzy MS. Duloxetine protects against experimental diabetic retinopathy in mice through retinal GFAP downregulation and modulation of neurotrophic factors. Exp Eye Res 2019; 186:107742. [PMID: 31344388 DOI: 10.1016/j.exer.2019.107742] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 07/19/2019] [Accepted: 07/19/2019] [Indexed: 12/23/2022]
Abstract
Diabetic retinopathy (DR) is recognized as one of the leading causes of blindness worldwide. Searching and validation for a novel therapeutic strategy to prevent its progress are promising. This work aimed to assess the retinal protective effects of duloxetine (DLX) in Alloxan-induced diabetic mice model. Animals were equally and randomly divided to four groups (eight mice per group); group 1: is the control group, 2: diabetic group, 3&4: diabetic and after 9 weeks received DLX for 4 weeks (15 mg/kg and 30 mg/kg), respectively. Quantitative real-time PCR (qPCR) analysis revealed nerve growth factor (NGF), inducible nitric oxide synthase (iNOS) and transforming growth factor beta (TGF-β) genes upregulation in the diabetic group compared to controls. Also, increased retinal malondialdehyde (MDA) and the decline of reduced glutathione (GSH) levels were observed. The morphometric analysis of diabetic retina revealed a significant reduction in total retinal thickness compared to control. Diabetic retinal immunostaining and Western blot analyses displayed glial fibrillary acidic protein (GFAP) and vascular endothelial cell growth factor (VEGF) proteins expression upregulation as well as glucose transporter-1 (GLUT-1) downregulation comparing to controls. However, DLX-treated groups showed downregulated NGF, iNOS, and TGF-β that was more obviously seen in the DLX-30 mg/kg group than DLX-15 mg/kg group. Furthermore, these groups showed amelioration of the oxidative markers; MDA and GSH, retaining the total retinal thickness nearly to control, GFAP and VEGF downregulation, and GLUT-1 upregulation compared to diabetic group. Taken together, it could be summarized that duloxetine can attenuate DR via the anti-inflammatory and the anti-oxidative properties as well as modulating the angiogenic and the neurotrophic factors expressions. This could hopefully pave the road to be included in the novel list of the therapeutic regimen for DR after validation in the clinic.
Collapse
Affiliation(s)
- Hoda I Bahr
- Department of Biochemistry, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, 41522, Egypt.
| | - Ahmed A Abdelghany
- Department of Ophthalmology, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt.
| | - Rania A Galhom
- Department of Human Anatomy and Embryology, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt.
| | - Bassant M Barakat
- Department of Pharmacology and Toxicology, Faculty of Pharmacy (Girls), Al-Azhar University, Cairo, Egypt; Department of Clinical Pharmacy, College of Clinical Pharmacy, Al-Baha University, Al-Baha, Saudi Arabia.
| | - El-Shaimaa A Arafa
- Department of Clinical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman, 346, United Arab Emirates; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, 62514, Egypt.
| | - Manal S Fawzy
- Department of Biochemistry, Faculty of Medicine, Northern Border University, Arar, Saudi Arabia; Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Suez Canal University, Ismailia, 41522, Egypt.
| |
Collapse
|
14
|
Guo Y, Xie JP, Deng K, Li X, Yuan Y, Xuan Q, Xie J, He XM, Wang Q, Li JJ, Luo HR. Prophylactic Effects of Bifidobacterium adolescentis on Anxiety and Depression-Like Phenotypes After Chronic Stress: A Role of the Gut Microbiota-Inflammation Axis. Front Behav Neurosci 2019; 13:126. [PMID: 31275120 PMCID: PMC6591489 DOI: 10.3389/fnbeh.2019.00126] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 05/24/2019] [Indexed: 12/16/2022] Open
Abstract
Stress disturbs the balance of the gut microbiota and stimulates inflammation-to-brain mechanisms. Moreover, stress leads to anxiety and depressive disorders. Bifidobacterium adolescentis displays distinct anti-inflammatory effects. However, no report has focused on the anxiolytic and antidepressant effects of B. adolescentis related to the gut microbiome and the inflammation on chronic restraint stress (CRS) in mice. We found that pretreatment with B. adolescentis increased the time spent in the center of the open field apparatus, increased the percentage of entries into the open arms of the elevated plus-maze (EPM) and the percentage of time spent in the open arms of the EPM, and decreased the immobility duration in the tail suspension test as well as the forced swimming test (FST). Moreover, B. adolescentis increased the sequence proportion of Lactobacillus and reduced the sequence proportion of Bacteroides in feces. Furthermore, B. adolescentis markedly reduced the protein expression of interleukin-1β (IL-1β), tumor necrosis factor α (TNF-α), p-nuclear factor-kappa B (NF-κB) p65 and Iba1 and elevated brain derived neurotrophic factor (BDNF) expression in the hippocampus. We conclude that the anxiolytic and antidepressant effects of B. adolescentis are related to reducing inflammatory cytokines and rebalancing the gut microbiota.
Collapse
Affiliation(s)
- Ying Guo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China.,Key Laboratory for Aging and Regenerative Medicine, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,School of Basic Medical Sciences, Kunming Medical University, Kunming, China.,University of Chinese Academy of Sciences, Beijing, China
| | | | - Ke Deng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xia Li
- School of Basic Medical Sciences, Kunming Medical University, Kunming, China
| | - Yun Yuan
- School of Basic Medical Sciences, Kunming Medical University, Kunming, China
| | - Qun Xuan
- School of Basic Medical Sciences, Kunming Medical University, Kunming, China
| | - Jing Xie
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Xiao-Ming He
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Qian Wang
- School of Basic Medical Sciences, Kunming Medical University, Kunming, China
| | - Juan-Juan Li
- School of Basic Medical Sciences, Kunming Medical University, Kunming, China
| | - Huai-Rong Luo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China.,Key Laboratory for Aging and Regenerative Medicine, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,University of Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
15
|
Collier AF, Gumerson J, Lehtimäki K, Puoliväli J, Jones JW, Kane MA, Manne S, O'Neill A, Windish HP, Ahtoniemi T, Williams BA, Albrecht DE, Bloch RJ. Effect of Ibuprofen on Skeletal Muscle of Dysferlin-Null Mice. J Pharmacol Exp Ther 2017; 364:409-419. [PMID: 29284661 DOI: 10.1124/jpet.117.244244] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 12/21/2017] [Indexed: 12/19/2022] Open
Abstract
Ibuprofen, a nonsteroidal anti-inflammatory drug, and nitric oxide (NO) donors have been reported to reduce the severity of muscular dystrophies in mice associated with the absence of dystrophin or α-sarcoglycan, but their effects on mice that are dystrophic due to the absence of dysferlin have not been examined. We have tested ibuprofen, as well as isosorbide dinitrate (ISDN), a NO donor, to learn whether used alone or together they protect dysferlin-null muscle in A/J mice from large strain injury (LSI) induced by a series of high strain lengthening contractions. Mice were maintained on chow containing ibuprofen and ISDN for 4 weeks. They were then subjected to LSI and maintained on the drugs for 3 additional days. We measured loss of torque immediately following injury and at day 3 postinjury, fiber necrosis, and macrophage infiltration at day 3 postinjury, and serum levels of the drugs at the time of euthanasia. Loss of torque immediately after injury was not altered by the drugs. However, the torque on day 3 postinjury significantly decreased as a function of ibuprofen concentration in the serum (range, 0.67-8.2 µg/ml), independent of ISDN. The effects of ISDN on torque loss at day 3 postinjury were not significant. In long-term studies of dysferlinopathic BlAJ mice, lower doses of ibuprofen had no effects on muscle morphology, but reduced treadmill running by 40%. Our results indicate that ibuprofen can have deleterious effects on dysferlin-null muscle and suggest that its use at pharmacological doses should be avoided by individuals with dysferlinopathies.
Collapse
Affiliation(s)
- Alyssa F Collier
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Jessica Gumerson
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Kimmo Lehtimäki
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Jukka Puoliväli
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Jace W Jones
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Maureen A Kane
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Sankeerth Manne
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Andrea O'Neill
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Hillarie P Windish
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Toni Ahtoniemi
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Bradley A Williams
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Douglas E Albrecht
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| | - Robert J Bloch
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland (A.F.C., J.G., S.M., A.O'N., R.J.B.); Charles River Laboratories, Kuopio, Finland (K.L., J.P., T.A.); Mass Spectrometry Center, Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland (M.A.K., J.W.J.); and Jain Foundation, Seattle, Washington (H.P.W., B.A.W., D.E.A.)
| |
Collapse
|
16
|
Manning J, Buckley MM, O'Halloran KD, O'Malley D. Combined XIL-6R and urocortin-2 treatment restores MDX diaphragm muscle force. Muscle Nerve 2017; 56:E134-E140. [PMID: 28294390 DOI: 10.1002/mus.25644] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 02/23/2017] [Accepted: 03/07/2017] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Duchenne muscular dystrophy (DMD) is characterized by progressive muscle degeneration leading to immobility, respiratory failure, and premature death. As chronic inflammation and stress are implicated in DMD pathology, the efficacy of an anti-inflammatory and anti-stress intervention strategy in ameliorating diaphragm dysfunction was investigated. METHODS Diaphragm muscle contractile function was compared in wild-type and dystrophin-deficient mdx mice treated with saline, anti-interleukin-6 receptor antibodies (xIL-6R), the corticotrophin-releasing factor receptor 2 (CRFR2) agonist, urocortin 2, or both xIL-6R and urocortin 2. RESULTS Combined treatment with xIL-6R and urocortin 2 rescued impaired force in mdx diaphragms. Mechanical work production and muscle shortening was also improved by combined drug treatment. DISCUSSION Treatment which neutralizes peripheral IL-6 signaling and stimulates CRFR2 recovers force-generating capacity and the ability to perform mechanical work in mdx diaphragm muscle. These findings may be important in the search for therapeutic targets in DMD. Muscle Nerve 56: E134-E140, 2017.
Collapse
Affiliation(s)
- Jennifer Manning
- Department of Physiology, Western Gateway Building, University College Cork, Cork, Ireland
| | - Maria M Buckley
- Department of Physiology, Western Gateway Building, University College Cork, Cork, Ireland
| | - Ken D O'Halloran
- Department of Physiology, Western Gateway Building, University College Cork, Cork, Ireland
| | - Dervla O'Malley
- Department of Physiology, Western Gateway Building, University College Cork, Cork, Ireland
| |
Collapse
|
17
|
Remmelink E, Aartsma-Rus A, Smit AB, Verhage M, Loos M, van Putten M. Cognitive flexibility deficits in a mouse model for the absence of full-length dystrophin. GENES BRAIN AND BEHAVIOR 2017; 15:558-67. [PMID: 27220066 DOI: 10.1111/gbb.12301] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 05/14/2016] [Accepted: 05/20/2016] [Indexed: 11/28/2022]
Abstract
Duchenne muscular dystrophy (DMD) is a progressive muscle-wasting disorder, caused by mutations in the DMD gene and the resulting lack of dystrophin. The DMD gene has seven promoters, giving rise to multiple full-length and shorter isoforms. Besides the expression of dystrophin in muscles, the majority of dystrophin isoforms is expressed in brain and dystrophinopathy can lead to cognitive deficits, including intellectual impairments and deficits in executive function. In contrast to the muscle pathology, the impact of the lack of dystrophin on the brain is not very well studied. Here, we study the behavioral consequences of a lack of full-length dystrophin isoforms in mdx mice, particularly with regard to domains of executive functions and anxiety. We observed a deficit in cognitive flexibility in mdx mice in the absence of motor dysfunction or general learning impairments using two independent behavioral tests. In addition, increased anxiety was observed, but its expression depended on the context. Overall, these results suggest that the absence of full-length dystrophin in mice has specific behavioral effects that compare well to deficits observed in DMD patients.
Collapse
Affiliation(s)
- E Remmelink
- Sylics (Synaptologics B.V.), The Netherlands.,Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Neuroscience Campus Amsterdam, VU University, The Netherlands.,Department of Functional Genomics, Center for Neurogenomics and Cognitive Research, Neuroscience Campus Amsterdam, VU University Amsterdam, The Netherlands
| | - A Aartsma-Rus
- Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - A B Smit
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Neuroscience Campus Amsterdam, VU University, The Netherlands
| | - M Verhage
- Department of Functional Genomics, Center for Neurogenomics and Cognitive Research, Neuroscience Campus Amsterdam, VU University Amsterdam, The Netherlands
| | - M Loos
- Sylics (Synaptologics B.V.), The Netherlands
| | - M van Putten
- Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands
| |
Collapse
|
18
|
Rae MG, O'Malley D. Cognitive dysfunction in Duchenne muscular dystrophy: a possible role for neuromodulatory immune molecules. J Neurophysiol 2016; 116:1304-15. [PMID: 27385793 DOI: 10.1152/jn.00248.2016] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 06/29/2016] [Indexed: 11/22/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is an X chromosome-linked disease characterized by progressive physical disability, immobility, and premature death in affected boys. Underlying the devastating symptoms of DMD is the loss of dystrophin, a structural protein that connects the extracellular matrix to the cell cytoskeleton and provides protection against contraction-induced damage in muscle cells, leading to chronic peripheral inflammation. However, dystrophin is also expressed in neurons within specific brain regions, including the hippocampus, a structure associated with learning and memory formation. Linked to this, a subset of boys with DMD exhibit nonprogressing cognitive dysfunction, with deficits in verbal, short-term, and working memory. Furthermore, in the genetically comparable dystrophin-deficient mdx mouse model of DMD, some, but not all, types of learning and memory are deficient, and specific deficits in synaptogenesis and channel clustering at synapses has been noted. Little consideration has been devoted to the cognitive deficits associated with DMD compared with the research conducted into the peripheral effects of dystrophin deficiency. Therefore, this review focuses on what is known about the role of full-length dystrophin (Dp427) in hippocampal neurons. The importance of dystrophin in learning and memory is assessed, and the potential importance that inflammatory mediators, which are chronically elevated in dystrophinopathies, may have on hippocampal function is also evaluated.
Collapse
Affiliation(s)
- Mark G Rae
- Department of Physiology, University College Cork, Cork, Ireland; and
| | - Dervla O'Malley
- Department of Physiology, University College Cork, Cork, Ireland; and APC Microbiome Institute, University College Cork, Cork, Ireland
| |
Collapse
|
19
|
Manning J, Buckley MM, O'Halloran KD, O'Malley D. In vivo neutralization of IL-6 receptors ameliorates gastrointestinal dysfunction in dystrophin-deficient mdx mice. Neurogastroenterol Motil 2016; 28:1016-26. [PMID: 26920808 DOI: 10.1111/nmo.12803] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 01/25/2016] [Indexed: 01/12/2023]
Abstract
BACKGROUND Duchenne muscular dystrophy (DMD) is a fatal disease characterized by progressive deterioration and degeneration of striated muscle. A mutation resulting in the loss of dystrophin, a structural protein which protects cells from contraction-induced damage, underlies DMD pathophysiology. Damage to muscle fibers results in chronic inflammation and elevated levels of proinflammatory cytokines such as interleukin-6 (IL-6). However, loss of cellular dystrophin also affects neurons and smooth muscle in the gastrointestinal (GI) tract with complaints such as hypomotility, pseudo-obstruction, and constipation reported in DMD patients. METHODS Using dystrophin-deficient mdx mice, studies were carried out to examine colonic morphology and function compared with wild-type mice. Treatment with neutralizing IL-6 receptor antibodies (xIL-6R) and/or the corticotropin-releasing factor (CRF) 2 receptor agonist, urocortin 2 (uro2) was tested to determine if they ameliorated GI dysfunction in mdx mice. KEY RESULTS Mdx mice exhibited thickening of colonic smooth muscle layers and delayed stress-induced defecation. In organ bath studies, neurally mediated IL-6-evoked contractions were larger in mdx colons. In vivo treatment of mdx mice with xIL-6R normalized defecation rates and colon lengths. Uro2 treatment did not affect motility or morphology. The potentiated colonic contractile response to IL-6 was attenuated by treatment with xIL-6R. CONCLUSIONS & INFERENCES These findings confirm the importance of dystrophin in normal GI function and implicate IL-6 as an important regulator of GI motility in the mdx mouse. Inhibition of IL-6 signaling may offer a potential new therapeutic strategy for treating DMD-associated GI symptoms.
Collapse
Affiliation(s)
- J Manning
- Department of Physiology, University College Cork, Cork, Ireland
| | - M M Buckley
- Department of Physiology, University College Cork, Cork, Ireland.,APC Microbiome Institute, University College Cork, Cork, Ireland
| | - K D O'Halloran
- Department of Physiology, University College Cork, Cork, Ireland
| | - D O'Malley
- Department of Physiology, University College Cork, Cork, Ireland.,APC Microbiome Institute, University College Cork, Cork, Ireland
| |
Collapse
|
20
|
Burns DP, O'Halloran KD. Evidence of hypoxic tolerance in weak upper airway muscle from young mdx mice. Respir Physiol Neurobiol 2015; 226:68-75. [PMID: 26691169 DOI: 10.1016/j.resp.2015.12.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 10/16/2015] [Accepted: 12/01/2015] [Indexed: 10/22/2022]
Abstract
Duchenne muscular dystrophy (DMD) is a genetic disease characterised by deficiency in the protein dystrophin. The respiratory system is weakened and patients suffer from sleep disordered breathing and hypoventilation culminating in periods of hypoxaemia. We examined the effects of an acute (6h) hypoxic stress on sternohyoid muscle function (representative pharyngeal dilator). 8 week old male, wild-type (WT; C57BL/10ScSnJ; n=18) and mdx (C57BL/10ScSn-Dmd(mdx)/J; n=16) mice were exposed to sustained hypoxia (FIO2=0.10) or normoxia. Muscle functional properties were examined ex vivo. Additional WT (n=5) and mdx (n=5) sternohyoid muscle was exposed to an anoxic challenge. Sternohyoid dysfunction was observed in mdx mice with significant reductions in force and power. Following exposure to the acute in vivo hypoxic stress, WT sternohyoid muscle showed evidence of functional impairment (reduced force, work and power). Conversely, mdx sternohyoid showed an apparent tolerance to the acute hypoxic stress. This tolerance was not maintained for mdx following a severe hypoxic stress. A dysfunctional upper airway muscle phenotype is present at 8 weeks of age in the mdx mouse, which may have implications for the control of airway patency in DMD. Hypoxic tolerance in mdx respiratory muscle is suggestive of adaptation to chronic hypoxia, which could be present due to respiratory morbidity. We speculate a role for hypoxia in mdx respiratory muscle morbidity.
Collapse
Affiliation(s)
- David P Burns
- Department of Physiology, School of Medicine, University College Cork, Cork, Ireland.
| | - Ken D O'Halloran
- Department of Physiology, School of Medicine, University College Cork, Cork, Ireland
| |
Collapse
|
21
|
Yekta Z, Xie D, Bogner HR, Weber DR, Zhang X, Harhay M, Reese PP. The association of antidepressant medications and diabetic retinopathy among people with diabetes. J Diabetes Complications 2015; 29:1077-84. [PMID: 26233573 DOI: 10.1016/j.jdiacomp.2015.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 05/25/2015] [Accepted: 06/22/2015] [Indexed: 12/17/2022]
Abstract
OBJECTIVE To determine if the use of antidepressants was associated with lower odds of diabetic retinopathy and if so, to determine if this association was mediated by decreased inflammation as measured by C-reactive protein (CRP). DESIGN This was a cross sectional study of 1,041 participants with type 2 diabetes 40-85years old from the 2005-2008 National Health and Nutrition Examination Survey (NHANES). Multiple logistic regression was used to examine the association between the outcome of diabetic retinopathy and the primary exposure of antidepressant medication usage. We also determined whether CRP meets standard criteria as a mediator between antidepressant use and diabetic retinopathy. RESULTS Participants using antidepressants were less likely to have diabetic retinopathy (OR 0.50, 95% CI: 0.31-0.82). CRP did not meet one of the criteria for mediation. However, CRP was an effect modifier such that the association of antidepressant use and diabetic retinopathy was only present among participants with CRP ≥0.3mg/dl. Among the antidepressant drug classes, selective serotonin reuptake inhibitor (SSRI) users had significantly lower odds of developing diabetic retinopathy compared to non-users of antidepressants. CONCLUSIONS Using representative survey data of US adults with type-2 diabetes, this study found that antidepressant use was associated with lower odds of diabetic retinopathy. Further longitudinal and experimental studies are necessary to confirm this finding and to determine if there is a role for antidepressants in preventing diabetic retinopathy in select patient populations.
Collapse
Affiliation(s)
- Zahra Yekta
- Department of Biostatistics and Epidemiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
| | - Dawei Xie
- Department of Biostatistics and Epidemiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
| | - Hillary R Bogner
- Department of Biostatistics and Epidemiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
| | - David R Weber
- University of Rochester School of Medicine and Dentistry, Rochester, NY, USA.
| | - Xinzhi Zhang
- Health Scientist Administrator at National Institutes of Health, Bethesda, MD, USA.
| | - Michael Harhay
- Department of Biostatistics and Epidemiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
| | - Peter P Reese
- Department of Biostatistics and Epidemiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA; Renal-Electrolyte and Hypertension Division, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
| |
Collapse
|
22
|
Pelosi L, Berardinelli MG, Forcina L, Spelta E, Rizzuto E, Nicoletti C, Camilli C, Testa E, Catizone A, De Benedetti F, Musarò A. Increased levels of interleukin-6 exacerbate the dystrophic phenotype in mdx mice. Hum Mol Genet 2015; 24:6041-53. [PMID: 26251044 PMCID: PMC4599671 DOI: 10.1093/hmg/ddv323] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 08/03/2015] [Indexed: 12/13/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is characterized by progressive lethal muscle degeneration and chronic inflammatory response. The mdx mouse strain has served as the animal model for human DMD. However, while DMD patients undergo extensive necrosis, the affected muscles of adult mdx mice rapidly regenerates and regains structural and functional integrity. The basis for the mild effects observed in mice compared with the lethal consequences in humans remains unknown. In this study, we provide evidence that interleukin-6 (IL-6) is causally linked to the pathogenesis of muscular dystrophy. We report that forced expression of IL-6, in the adult mdx mice, recapitulates the severe phenotypic characteristics of DMD in humans. Increased levels of IL-6 exacerbate the dystrophic muscle phenotype, sustaining inflammatory response and repeated cycles of muscle degeneration and regeneration, leading to exhaustion of satellite cells. The mdx/IL6 mouse closely approximates the human disease and more faithfully recapitulates the disease progression in humans. This study promises to significantly advance our understanding of the pathogenic mechanisms that lead to DMD.
Collapse
Affiliation(s)
- Laura Pelosi
- Institute Pasteur Cenci-Bolognetti, DAHFMO-Unit of Histology and Medical Embryology, IIM and
| | | | - Laura Forcina
- Institute Pasteur Cenci-Bolognetti, DAHFMO-Unit of Histology and Medical Embryology, IIM and
| | - Elisa Spelta
- Institute Pasteur Cenci-Bolognetti, DAHFMO-Unit of Histology and Medical Embryology, IIM and
| | - Emanuele Rizzuto
- Department of Mechanical and Aerospace Engineering, Sapienza University of Rome, Rome 00184, Italy
| | - Carmine Nicoletti
- Institute Pasteur Cenci-Bolognetti, DAHFMO-Unit of Histology and Medical Embryology, IIM and
| | - Carlotta Camilli
- Institute Pasteur Cenci-Bolognetti, DAHFMO-Unit of Histology and Medical Embryology, IIM and
| | - Erika Testa
- Institute Pasteur Cenci-Bolognetti, DAHFMO-Unit of Histology and Medical Embryology, IIM and
| | - Angela Catizone
- DAHFMO-Unit of Histology and Medical Embryology, Sapienza University of Rome, Rome 00161, Italy
| | | | - Antonio Musarò
- Institute Pasteur Cenci-Bolognetti, DAHFMO-Unit of Histology and Medical Embryology, IIM and Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Rome 00161, Italy
| |
Collapse
|
23
|
Manning J, O'Malley D. What has the mdx mouse model of Duchenne muscular dystrophy contributed to our understanding of this disease? J Muscle Res Cell Motil 2015; 36:155-67. [PMID: 25669899 DOI: 10.1007/s10974-015-9406-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 01/28/2015] [Indexed: 12/20/2022]
Abstract
Duchenne muscular dystrophy (DMD) is a fatal X-chromosome linked recessive disorder caused by the truncation or deletion of the dystrophin gene. The most widely used animal model of this disease is the dystrophin-deficient mdx mouse which was first discovered 30 years ago. Despite its extensive use in DMD research, no effective treatment has yet been developed for this devastating disease. This review explores what we have learned from this mouse model regarding the pathophysiology of DMD and asks if it has a future in providing a better more thorough understanding of this disease or if it will bring us any closer to improving the outlook for DMD patients.
Collapse
Affiliation(s)
- Jennifer Manning
- Department of Physiology, University College Cork, 4.23 Western Gateway Building, Cork, Ireland
| | | |
Collapse
|
24
|
Respiratory Control in the mdx Mouse Model of Duchenne Muscular Dystrophy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 860:239-44. [PMID: 26303487 DOI: 10.1007/978-3-319-18440-1_27] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Duchenne muscular dystrophy (DMD) is a genetic disease caused by defects in the dystrophin gene resulting in loss of the structural protein dystrophin. Patients have reduced diaphragm functional capacity due to progressive muscle weakness. Respiratory morbidity in DMD is further characterised by hypoxaemic periods due to hypoventilation. DMD patients die prematurely due to respiratory and cardiac failure. In this study, we examined respiratory function in young adult male mdx (dystrophin deficient) mice (C57BL/10ScSn-Dmd(mdx)/J; n = 10) and in wild-type controls (WT; C57BL/10ScSnJ; n = 11). Breathing was assessed in unrestrained, unanaesthetised animals by whole-body plethysmography. Ventilatory parameters were recorded during air breathing and during exposure to acute hypoxia (F(i)O(2) = 0.1, 20 min). Data for the two groups of animals were compared using Student's t tests. During normoxic breathing, mdx mice had reduced breathing frequency (p = 0.011), tidal volume (p = 0.093) and minute ventilation (p = 0.033) compared to WT. Hypoxia increased minute ventilation in WT and mdx animals. Mdx mice had a significantly increased ventilatory response to hypoxia which manifest as an elevated % change from baseline for minute ventilation (p = 0.0015) compared to WT. We conclude that mdx mice have impaired normoxic ventilation suggestive of hypoventilation. Furthermore, mdx mice have an enhanced hypoxic ventilatory response compared to WT animals which we speculate may be secondary to chronic hypoxaemia. Our results indicate that a significant respiratory phenotype is evident as early as 8 weeks in the mdx mouse model of DMD.
Collapse
|