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Wang Z, Henriques A, Rouvière L, Callizot N, Tan L, Hotchkin MT, Rossignol R, Mortenson MG, Dorfman AR, Ho KS, Wang H. A Mechanism Underpinning the Bioenergetic Metabolism-Regulating Function of Gold Nanocatalysts. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2304082. [PMID: 37767608 DOI: 10.1002/smll.202304082] [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: 05/15/2023] [Revised: 08/17/2023] [Indexed: 09/29/2023]
Abstract
Bioenergetic deficits are known to be significant contributors to neurodegenerative diseases. Nevertheless, identifying safe and effective means to address intracellular bioenergetic deficits remains a significant challenge. This work provides mechanistic insights into the energy metabolism-regulating function of colloidal Au nanocrystals, referred to as CNM-Au8, that are synthesized electrochemically in the absence of surface-capping organic ligands. When neurons are subjected to excitotoxic stressors or toxic peptides, treatment of neurons with CNM-Au8 results in dose-dependent neuronal survival and neurite network preservation across multiple neuronal subtypes. CNM-Au8 efficiently catalyzes the conversion of an energetic cofactor, nicotinamide adenine dinucleotide hydride (NADH), into its oxidized counterpart (NAD+ ), which promotes bioenergy production by regulating the intracellular level of adenosine triphosphate. Detailed kinetic measurements reveal that CNM-Au8-catalyzed NADH oxidation obeys Michaelis-Menten kinetics and exhibits pH-dependent kinetic profiles. Photoexcited charge carriers and photothermal effect, which result from optical excitations and decay of the plasmonic electron oscillations or the interband electronic transitions in CNM-Au8, are further harnessed as unique leverages to modulate reaction kinetics. As exemplified by this work, Au nanocrystals with deliberately tailored structures and surfactant-free clean surfaces hold great promise for developing next-generation therapeutic agents for neurodegenerative diseases.
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Affiliation(s)
- Zixin Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | | | | | | | - Lin Tan
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | | | - Rodrigue Rossignol
- Cellomet, CARF Center, University of Bordeaux, 146 rue Léo Saignat, Bordeaux, 33000, France
| | - Mark G Mortenson
- Clene Nanomedicine, Inc., Salt Lake City, UT, 84117, USA
- Clene Nanomedicine, Inc., North East, MD, 21901, USA
| | | | - Karen S Ho
- Clene Nanomedicine, Inc., Salt Lake City, UT, 84117, USA
| | - Hui Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
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Lemarchant S, Sourioux M, Le Douce J, Henriques A, Callizot N, Hugues S, Farinelli M, Godfrin Y. NX210c Peptide Promotes Glutamatergic Receptor-Mediated Synaptic Transmission and Signaling in the Mouse Central Nervous System. Int J Mol Sci 2022; 23:8867. [PMID: 36012124 PMCID: PMC9408760 DOI: 10.3390/ijms23168867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/28/2022] [Accepted: 08/08/2022] [Indexed: 11/29/2022] Open
Abstract
NX210c is a disease-modifying dodecapeptide derived from the subcommissural organ-spondin that is under preclinical and clinical development for the treatment of neurological disorders. Here, using whole-cell patch-clamp recordings, we demonstrate that NX210c increased α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR)- and GluN2A-containing N-methyl-D-aspartate receptor (GluN2A-NMDAR)-mediated excitatory postsynaptic currents in the brain. Accordingly, using extracellular field excitatory postsynaptic potential recordings, an enhancement of synaptic transmission was shown in the presence of NX210c in two different neuronal circuits. Furthermore, the modulation of synaptic transmission and GluN2A-NMDAR-driven signaling by NX210c restored memory in mice chronically treated with the NMDAR antagonist phencyclidine. Overall, by promoting glutamatergic receptor-related neurotransmission and signaling, NX210c represents an innovative therapeutic opportunity for patients suffering from CNS disorders, injuries, and states with crippling synaptic dysfunctions.
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Affiliation(s)
| | | | | | | | - Noëlle Callizot
- Neuro-Sys, 410 Chemin Départemental 60, 13120 Gardanne, France
| | - Sandrine Hugues
- E-Phy-Science, Bioparc, 2400 Routes de Colles, Sophia Antipolis, 06410 Biot, France
| | - Mélissa Farinelli
- E-Phy-Science, Bioparc, 2400 Routes de Colles, Sophia Antipolis, 06410 Biot, France
| | - Yann Godfrin
- Axoltis Pharma, 60 Avenue Rockefeller, 69008 Lyon, France
- Godfrin Life-Sciences, 8 Impasse de la Source, 69300 Caluire-et-Cuire, France
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Boussicault L, Laffaire J, Schmitt P, Rinaudo P, Callizot N, Nabirotchkin S, Hajj R, Cohen D. Combination of acamprosate and baclofen (PXT864) as a potential new therapy for amyotrophic lateral sclerosis. J Neurosci Res 2020; 98:2435-2450. [PMID: 32815196 PMCID: PMC7693228 DOI: 10.1002/jnr.24714] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 07/16/2020] [Accepted: 07/25/2020] [Indexed: 12/11/2022]
Abstract
There is currently no therapy impacting the course of amyotrophic lateral sclerosis (ALS). The only approved treatments are riluzole and edaravone, but their efficacy is modest and short‐lasting, highlighting the need for innovative therapies. We previously demonstrated the ability of PXT864, a combination of low doses of acamprosate and baclofen, to synergistically restore cellular and behavioral activity in Alzheimer's and Parkinson's disease models. The overlapping genetic, molecular, and cellular characteristics of these neurodegenerative diseases supported investigating the effectiveness of PXT864 in ALS. As neuromuscular junction (NMJ) alterations is a key feature of ALS, the effects of PXT864 in primary neuron‐muscle cocultures injured by glutamate were studied. PXT864 significantly and synergistically preserved NMJ and motoneuron integrity following glutamate excitotoxicity. PXT864 added to riluzole significantly improved such protection. PXT864 activity was then assessed in primary cultures of motoneurons derived from SOD1G93A rat embryos. These motoneurons presented severe maturation defects that were significantly improved by PXT864. In this model, glutamate application induced an accumulation of TDP‐43 protein in the cytoplasm, a hallmark that was completely prevented by PXT864. The anti‐TDP‐43 aggregation effect was also confirmed in a cell line expressing TDP‐43 fused to GFP. These results demonstrate the value of PXT864 as a promising therapeutic strategy for the treatment of ALS.
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Bouscary A, Quessada C, Mosbach A, Callizot N, Spedding M, Loeffler JP, Henriques A. Ambroxol Hydrochloride Improves Motor Functions and Extends Survival in a Mouse Model of Familial Amyotrophic Lateral Sclerosis. Front Pharmacol 2019; 10:883. [PMID: 31447678 PMCID: PMC6692493 DOI: 10.3389/fphar.2019.00883] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 07/15/2019] [Indexed: 12/12/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a multifactorial and fatal neurodegenerative disease. Growing evidence connects sphingolipid metabolism to the pathophysiology of ALS. In particular, levels of ceramides, glucosylceramides, and gangliosides are dysregulated in the central nervous system and at the neuromuscular junctions of both animal models and patients. Glucosylceramide is the main precursor of complex glycosphingolipids that is degraded by lysosomal (GBA1) or non-lysosomal (GBA2) glucocerebrosidase. Here, we report that GBA2, but not GBA1, activity is markedly increased in the spinal cord, of SOD1G86R mice, an animal model of familial ALS, even before disease onset. We therefore investigated the effects of ambroxol hydrochloride, a known GBA2 inhibitor, in SOD1G86R mice. A presymptomatic administration of ambroxol hydrochloride, in the drinking water, delayed disease onset, protecting neuromuscular junctions, and the number of functional spinal motor neurons. When administered at disease onset, ambroxol hydrochloride delayed motor function decline, protected neuromuscular junctions, and extended overall survival of the SOD1G86R mice. In addition, ambroxol hydrochloride improved motor recovery and muscle re-innervation after transient sciatic nerve injury in non-transgenic mice and promoted axonal elongation in an in vitro model of motor unit. Our study suggests that ambroxol hydrochloride promotes and protects motor units and improves axonal plasticity, and that this generic compound is a promising drug candidate for ALS.
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Affiliation(s)
- Alexandra Bouscary
- Université de Strasbourg, UMR_S 1118, Fédération de Médecine Translationnelle, Strasbourg, France.,INSERM, U1118, Mécanismes Centraux et Périphériques de la Neurodégénérescence, Strasbourg, France
| | - Cyril Quessada
- Université de Strasbourg, UMR_S 1118, Fédération de Médecine Translationnelle, Strasbourg, France.,INSERM, U1118, Mécanismes Centraux et Périphériques de la Neurodégénérescence, Strasbourg, France
| | - Althéa Mosbach
- Université de Strasbourg, UMR_S 1118, Fédération de Médecine Translationnelle, Strasbourg, France.,INSERM, U1118, Mécanismes Centraux et Périphériques de la Neurodégénérescence, Strasbourg, France
| | | | | | - Jean-Philippe Loeffler
- Université de Strasbourg, UMR_S 1118, Fédération de Médecine Translationnelle, Strasbourg, France.,INSERM, U1118, Mécanismes Centraux et Périphériques de la Neurodégénérescence, Strasbourg, France
| | - Alexandre Henriques
- Université de Strasbourg, UMR_S 1118, Fédération de Médecine Translationnelle, Strasbourg, France.,INSERM, U1118, Mécanismes Centraux et Périphériques de la Neurodégénérescence, Strasbourg, France.,Spedding Research Solutions SAS, Le Vesinet, France
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Colón A, Guo X, Akanda N, Cai Y, Hickman JJ. Functional analysis of human intrafusal fiber innervation by human γ-motoneurons. Sci Rep 2017; 7:17202. [PMID: 29222416 PMCID: PMC5722897 DOI: 10.1038/s41598-017-17382-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 11/21/2017] [Indexed: 11/09/2022] Open
Abstract
Investigation of neuromuscular deficits and diseases such as SMA, as well as for next generation prosthetics, utilizing in vitro phenotypic models would benefit from the development of a functional neuromuscular reflex arc. The neuromuscular reflex arc is the system that integrates the proprioceptive information for muscle length and activity (sensory afferent), to modify motoneuron output to achieve graded muscle contraction (actuation efferent). The sensory portion of the arc is composed of proprioceptive sensory neurons and the muscle spindle, which is embedded in the muscle tissue and composed of intrafusal fibers. The gamma motoneurons (γ-MNs) that innervate these fibers regulate the intrafusal fiber's stretch so that they retain proper tension and sensitivity during muscle contraction or relaxation. This mechanism is in place to maintain the sensitivity of proprioception during dynamic muscle activity and to prevent muscular damage. In this study, a co-culture system was developed for innervation of intrafusal fibers by human γ-MNs and demonstrated by morphological and immunocytochemical analysis, then validated by functional electrophysiological evaluation. This human-based fusimotor model and its incorporation into the reflex arc allows for a more accurate recapitulation of neuromuscular function for applications in disease investigations, drug discovery, prosthetic design and neuropathic pain investigations.
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Affiliation(s)
- A Colón
- Hybrid Systems Lab, NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL, 32826, USA
| | - X Guo
- Hybrid Systems Lab, NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL, 32826, USA
| | - N Akanda
- Hybrid Systems Lab, NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL, 32826, USA
| | - Y Cai
- Hybrid Systems Lab, NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL, 32826, USA
| | - J J Hickman
- Hybrid Systems Lab, NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL, 32826, USA.
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Maneshi MM, Maki B, Gnanasambandam R, Belin S, Popescu GK, Sachs F, Hua SZ. Mechanical stress activates NMDA receptors in the absence of agonists. Sci Rep 2017; 7:39610. [PMID: 28045032 PMCID: PMC5206744 DOI: 10.1038/srep39610] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 11/24/2016] [Indexed: 01/13/2023] Open
Abstract
While studying the physiological response of primary rat astrocytes to fluid shear stress in a model of traumatic brain injury (TBI), we found that shear stress induced Ca2+ entry. The influx was inhibited by MK-801, a specific pore blocker of N-Methyl-D-aspartic acid receptor (NMDAR) channels, and this occurred in the absence of agonists. Other NMDA open channel blockers ketamine and memantine showed a similar effect. The competitive glutamate antagonists AP5 and GluN2B-selective inhibitor ifenprodil reduced NMDA-activated currents, but had no effect on the mechanically induced Ca2+ influx. Extracellular Mg2+ at 2 mM did not significantly affect the shear induced Ca2+ influx, but at 10 mM it produced significant inhibition. Patch clamp experiments showed mechanical activation of NMDAR and inhibition by MK-801. The mechanical sensitivity of NMDARs may play a role in the normal physiology of fluid flow in the glymphatic system and it has obvious relevance to TBI.
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Affiliation(s)
- Mohammad Mehdi Maneshi
- Department of Physiology and Biophysics, University at Buffalo, Buffalo, New York, 14260, USA
- Department of Mechanical and Aerospace Engineering, University at Buffalo, Buffalo, New York 14260, USA
| | - Bruce Maki
- Department of Biochemistry, University at Buffalo, Buffalo, New York 14260, USA
| | | | - Sophie Belin
- Department of Biochemistry, University at Buffalo, Buffalo, New York 14260, USA
| | - Gabriela K. Popescu
- Department of Biochemistry, University at Buffalo, Buffalo, New York 14260, USA
| | - Frederick Sachs
- Department of Physiology and Biophysics, University at Buffalo, Buffalo, New York, 14260, USA
| | - Susan Z. Hua
- Department of Physiology and Biophysics, University at Buffalo, Buffalo, New York, 14260, USA
- Department of Mechanical and Aerospace Engineering, University at Buffalo, Buffalo, New York 14260, USA
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