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Farinato A, Cavalluzzi MM, Altamura C, Campanale C, Laghetti P, Saltarella I, Delre P, Barbault A, Tarantino N, Milani G, Rotondo NP, Di Cesare Mannelli L, Ghelardini C, Pierno S, Mangiatordi GF, Lentini G, Desaphy JF. Development of Riluzole Analogs with Improved Use-Dependent Inhibition of Skeletal Muscle Sodium Channels. ACS Med Chem Lett 2023; 14:999-1008. [PMID: 37465302 PMCID: PMC10350938 DOI: 10.1021/acsmedchemlett.3c00224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 06/20/2023] [Indexed: 07/20/2023] Open
Abstract
Several commercially available and newly synthesized riluzole analogs were evaluated in vitro as voltage-gated skeletal muscle sodium-channel blockers. Data obtained from the patch-clamp technique demonstrated that potency is well correlated with lipophilicity and the introduction of a protonatable amino function in the benzothiazole 2-position enhances the use-dependent behavior. The most interesting compound, the 2-piperazine analog of riluzole (14), although slightly less potent than the parent compound in the patch-clamp assay as well as in an in vitro model of myotonia, showed greater use-dependent Nav1.4 blocking activity. Docking studies allowed the identification of the key interactions that 14 makes with the amino acids of the local anesthetic binding site within the pore of the channel. The reported results pave the way for the identification of novel compounds useful in the treatment of cell excitability disorders.
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Affiliation(s)
- Alessandro Farinato
- Section
of Pharmacology, Department of Pharmacy − Drug Sciences, University of Bari Aldo Moro, 70125 Bari, Italy
| | - Maria Maddalena Cavalluzzi
- Section
of Medicinal Chemistry, Department of Pharmacy − Drug Sciences, University of Bari Aldo Moro, 70125 Bari, Italy
| | - Concetta Altamura
- Section
of Pharmacology, Department of Precision and Regenerative Medicine,
School of Medicine, University of Bari Aldo
Moro, 70124 Bari, Italy
| | - Carmen Campanale
- Section
of Pharmacology, Department of Precision and Regenerative Medicine,
School of Medicine, University of Bari Aldo
Moro, 70124 Bari, Italy
| | - Paola Laghetti
- Section
of Pharmacology, Department of Precision and Regenerative Medicine,
School of Medicine, University of Bari Aldo
Moro, 70124 Bari, Italy
| | - Ilaria Saltarella
- Section
of Pharmacology, Department of Precision and Regenerative Medicine,
School of Medicine, University of Bari Aldo
Moro, 70124 Bari, Italy
| | - Pietro Delre
- CNR
− Institute of Crystallography, via Amendola 122/o, 70126 Bari, Italy
| | - Arthur Barbault
- CNR
− Institute of Crystallography, via Amendola 122/o, 70126 Bari, Italy
| | - Nancy Tarantino
- Section
of Pharmacology, Department of Pharmacy − Drug Sciences, University of Bari Aldo Moro, 70125 Bari, Italy
| | - Gualtiero Milani
- Section
of Medicinal Chemistry, Department of Pharmacy − Drug Sciences, University of Bari Aldo Moro, 70125 Bari, Italy
| | - Natalie Paola Rotondo
- Section
of Medicinal Chemistry, Department of Pharmacy − Drug Sciences, University of Bari Aldo Moro, 70125 Bari, Italy
| | - Lorenzo Di Cesare Mannelli
- Department
NEUROFARBA - Pharmaceutical and Nutraceutical Section, University of Firenze, 50139 Florence, Italy
| | - Carla Ghelardini
- Department
NEUROFARBA - Pharmaceutical and Nutraceutical Section, University of Firenze, 50139 Florence, Italy
| | - Sabata Pierno
- Section
of Pharmacology, Department of Pharmacy − Drug Sciences, University of Bari Aldo Moro, 70125 Bari, Italy
| | | | - Giovanni Lentini
- Section
of Medicinal Chemistry, Department of Pharmacy − Drug Sciences, University of Bari Aldo Moro, 70125 Bari, Italy
| | - Jean-François Desaphy
- Section
of Pharmacology, Department of Precision and Regenerative Medicine,
School of Medicine, University of Bari Aldo
Moro, 70124 Bari, Italy
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Baronas VA, McGuinness BR, Brigidi GS, Gomm Kolisko RN, Vilin YY, Kim RY, Lynn FC, Bamji SX, Yang R, Kurata HT. Use-dependent activation of neuronal Kv1.2 channel complexes. J Neurosci 2015; 35:3515-24. [PMID: 25716850 DOI: 10.1523/JNEUROSCI.4518-13.2015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
In excitable cells, ion channels are frequently challenged by repetitive stimuli, and their responses shape cellular behavior by regulating the duration and termination of bursts of action potentials. We have investigated the behavior of Shaker family voltage-gated potassium (Kv) channels subjected to repetitive stimuli, with a particular focus on Kv1.2. Genetic deletion of this subunit results in complete mortality within 2 weeks of birth in mice, highlighting a critical physiological role for Kv1.2. Kv1.2 channels exhibit a unique property described previously as "prepulse potentiation," in which activation by a depolarizing step facilitates activation in a subsequent pulse. In this study, we demonstrate that this property enables Kv1.2 channels to exhibit use-dependent activation during trains of very brief depolarizations. Also, Kv subunits usually assemble into heteromeric channels in the central nervous system, generating diversity of function and sensitivity to signaling mechanisms. We demonstrate that other Kv1 channel types do not exhibit use-dependent activation, but this property is conferred in heteromeric channel complexes containing even a single Kv1.2 subunit. This regulatory mechanism is observed in mammalian cell lines as well as primary cultures of hippocampal neurons. Our findings illustrate that use-dependent activation is a unique property of Kv1.2 that persists in heteromeric channel complexes and may influence function of hippocampal neurons.
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Fu LY, Cummins TR, Moczydlowski EG. Sensitivity of cloned muscle, heart and neuronal voltage-gated sodium channels to block by polyamines: a possible basis for modulation of excitability in vivo. Channels (Austin) 2012; 6:41-9. [PMID: 22522923 DOI: 10.4161/chan.19001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Spermidine and spermine, are endogenous polyamines (PAs) that regulate cell growth and modulate the activity of numerous ion channel proteins. In particular, intracellular PAs are potent blockers of many different cation channels and are responsible for strong suppression of outward K (+) current, a phenomenon known as inward rectification characteristic of a major class of KIR K (+) channels. We previously described block of heterologously expressed voltage-gated Na (+) channels (NaV) of rat muscle by intracellular PAs and PAs have recently been found to modulate excitability of brain neocortical neurons by blocking neuronal NaV channels. In this study, we compared the sensitivity of four different cloned mammalian NaV isoforms to PAs to investigate whether PA block is a common feature of NaV channel pharmacology. We find that outward Na (+) current of muscle (NaV 1.4), heart (NaV 1.5), and neuronal (NaV 1.2, NaV 1.7) NaV isoforms is blocked by PAs, suggesting that PA metabolism may be linked to modulation of action potential firing in numerous excitable tissues. Interestingly, the cardiac NaV 1.5 channel is more sensitive to PA block than other isoforms. Our results also indicate that rapid binding of PAs to blocking sites in the NaV 1.4 channel is restricted to access from the cytoplasmic side of the channel, but plasma membrane transport pathways for PA uptake may contribute to long-term NaV channel modulation. PAs may also play a role in drug interactions since spermine attenuates the use-dependent effect of the lidocaine, a typical local anesthetic and anti-arrhythmic drug.
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Affiliation(s)
- Li-Ying Fu
- Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
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Van Dongen HP, Belenky G, Krueger JM. A local, bottom-up perspective on sleep deprivation and neurobehavioral performance. Curr Top Med Chem 2011; 11:2414-22. [PMID: 21906023 PMCID: PMC3243827 DOI: 10.2174/156802611797470286] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Accepted: 08/10/2010] [Indexed: 11/22/2022]
Abstract
Waking neurobehavioral performance is temporally regulated by a sleep/wake homeostatic process and a circadian process in interaction with a time-on-task effect. Neurobehavioral impairment resulting from these factors is task-specific, and characterized by performance variability. Several aspects of these phenomena are not well understood, and cannot be explained solely by a top-down (subcortically driven) view of sleep/wake and performance regulation. We present a bottom-up theory, where we postulate that task performance is degraded by local, use-dependent sleep in neuronal groups subserving cognitive processes associated with the task at hand. The theory offers explanations for the temporal dependence of neurobehavioral performance on time awake, time on task, and their interaction; for the effectiveness of task switching and rest breaks to overcome the time-on-task effect (but not the effects of sleep deprivation); for the task-specific nature of neurobehavioral impairment; and for the stochastic property of performance variability.
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Affiliation(s)
- Hans P.A. Van Dongen
- Sleep and Performance Research Center and Neuroscience Program, Washington State University, USA
| | - Gregory Belenky
- Sleep and Performance Research Center and Neuroscience Program, Washington State University, USA
| | - James M. Krueger
- Sleep and Performance Research Center and Neuroscience Program, Washington State University, USA
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