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Lu Y, Wang J, Li L, Zhang X. The role of voltage-gated calcium channel α2δ-1 in the occurrence and development in myofascial orofacial pain. BMC Oral Health 2024; 24:552. [PMID: 38735923 PMCID: PMC11089774 DOI: 10.1186/s12903-024-04338-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 05/06/2024] [Indexed: 05/14/2024] Open
Abstract
Patients who suffer from myofascial orofacial pain could affect their quality of life deeply. The pathogenesis of pain is still unclear. Our objective was to assess Whether Voltage-gated calcium channel α2δ-1(Cavα2δ-1) is related to myofascial orofacial pain. Rats were divided into the masseter tendon ligation group and the sham group. Compared with the sham group, the mechanical pain threshold of the masseter tendon ligation group was reduced on the 4th, 7th, 10th and 14th day after operation(P < 0.05). On the 14th day after operation, Cavα2δ-1 mRNA expression levels in trigeminal ganglion (TG) and the trigeminal spinal subnucleus caudalis and C1-C2 spinal cervical dorsal horn (Vc/C2) of the masseter tendon ligation group were increased (PTG=0.021, PVc/C2=0.012). Rats were divided into three groups. On the 4th day after ligating the superficial tendon of the left masseter muscle of the rats, 10 ul Cavα2δ-1 antisense oligonucleotide, 10 ul Cavα2δ-1 mismatched oligonucleotides and 10 ul normal saline was separately injected into the left masseter muscle of rats in Cavα2δ-1 antisense oligonucleotide group, Cavα2δ-1 mismatched oligonucleotides group and normal saline control group twice a day for 4 days. The mechanical pain threshold of the Cavα2δ-1 antisense oligonucleotides group was higher than Cavα2δ-1 mismatched oligonucleotides group on the 7th and 10th day after operation (P < 0.01). After PC12 cells were treated with lipopolysaccharide, Cavα2δ-1 mRNA expression level increased (P < 0.001). Cavα2δ-1 may be involved in the occurrence and development in myofascial orofacial pain.
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Affiliation(s)
- Yang Lu
- Department of Stomatology, General Hospital of Northern Theater Command, No.83, Wenhua Road, Shenhe District, Shenyang, 110016, China
| | - Jingfu Wang
- Department of Stomatology, General Hospital of Northern Theater Command, No.83, Wenhua Road, Shenhe District, Shenyang, 110016, China
| | - Li Li
- Department of Stomatology, General Hospital of Northern Theater Command, No.83, Wenhua Road, Shenhe District, Shenyang, 110016, China
| | - Xiaodong Zhang
- Department of Stomatology, General Hospital of Northern Theater Command, No.83, Wenhua Road, Shenhe District, Shenyang, 110016, China.
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2
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Breitinger U, Breitinger HG. Excitatory and inhibitory neuronal signaling in inflammatory and diabetic neuropathic pain. Mol Med 2023; 29:53. [PMID: 37069517 PMCID: PMC10111846 DOI: 10.1186/s10020-023-00647-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 03/27/2023] [Indexed: 04/19/2023] Open
Abstract
Pain, although unpleasant, is an essential warning mechanism against injury and damage of the organism. An intricate network of specialised sensors and transmission systems contributes to reception, transmission and central sensitization of pain. Here, we briefly introduce some of the main aspects of pain signal transmission, including nociceptors and nociceptive signals, mechanisms of inflammatory and neuropathic pain, and the situation of diabetes-associated neuropathic pain. The role of glia-astrocytes, microglia, satellite glia cells-and their specific channels, transporters and signaling pathways is described. A focus is on the contribution of inhibitory synaptic signaling to nociception and a possible role of glycine receptors in glucose-mediated analgesia and treatment-induced diabetic neuropathy. Inhibitory receptors such as GABAA- and glycine receptors are important contributors to nociceptive signaling; their contribution to altered pain sensation in diabetes may be of clinical relevance, and they could be promising therapeutic targets towards the development of novel analgesics.
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Affiliation(s)
- Ulrike Breitinger
- Department of Biochemistry, German University in Cairo, New Cairo, 11835, Egypt
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3
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Velasco-González R, Coffeen U. Neurophysiopathological Aspects of Paclitaxel-induced Peripheral Neuropathy. Neurotox Res 2022; 40:1673-1689. [PMID: 36169871 DOI: 10.1007/s12640-022-00582-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/07/2022] [Accepted: 09/14/2022] [Indexed: 12/31/2022]
Abstract
Chemotherapy is widely used as a primary treatment or adjuvant therapy for cancer. Anti-microtubule agents (such as paclitaxel and docetaxel) are used for treating many types of cancer, either alone or in combination. However, their use has negative consequences that restrict the treatment's ability to continue. The principal negative effect is the so-called chemotherapy-induced peripheral neuropathy (CIPN). CIPN is a complex ailment that depends on diversity in the mechanisms of action of the different chemotherapy drugs, which are not fully understood. In this paper, we review several neurophysiological and pathological characteristics, such as morphological changes, changes in ion channels, mitochondria and oxidative stress, cell death, changes in the immune response, and synaptic control, as well as the characteristics of neuropathic pain produced by paclitaxel.
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Affiliation(s)
- Roberto Velasco-González
- Laboratorio de Neurofisiología Integrativa, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de La Fuente Muñiz, Ciudad de México, México.,Maestría en Ciencias Biológicas, UNAM, Ciudad de México, México
| | - Ulises Coffeen
- Laboratorio de Neurofisiología Integrativa, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de La Fuente Muñiz, Ciudad de México, México.
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Xu S, Yi Y, Wang Y, Wang P, Zhao Y, Feng W. Dexmedetomidine Alleviates Neuropathic Pain via the TRPC6-p38 MAPK Pathway in the Dorsal Root Ganglia of Rats. J Pain Res 2022; 15:2437-2448. [PMID: 36016537 PMCID: PMC9397435 DOI: 10.2147/jpr.s378893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/15/2022] [Indexed: 12/02/2022] Open
Abstract
Purpose Neuropathic pain is a chronic intractable disease characterized by allodynia and hyperalgesia. Effective treatments are unavailable because of the complicated mechanisms of neuropathic pain. Transient receptor potential canonical 6 (TRPC6) is a nonselective calcium (Ca2+)-channel protein related to hyperalgesia. Dexmedetomidine (Dex) is an alpha-2 (α2) adrenoreceptor agonist that mediates intracellular Ca2+ levels to alleviate pain. However, the relationship between TRPC6 and Dex is currently unclear. We speculated that the α2 receptor agonist would be closely linked to the TRPC6 channel. We aimed to investigate whether Dex relieves neuropathic pain by the TRPC6 pathway in the dorsal root ganglia (DRG). Methods The chronic constriction injury (CCI) model was established in male rats, and we evaluated the mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL). The expression of TRPC6 and Iba-1 in the DRG were analyzed using quantitative real-time polymerase chain reaction, Western blot, and immunofluorescence assay. The levels of inflammatory cytokines were measured using an enzyme-linked immunosorbent assay. Results Compared with the CCI normal saline group, both the MWT and TWL were significantly improved after 7 days of Dex administration. Results demonstrated that TRPC6 expression was increased in the DRG following CCI but was suppressed by Dex. In addition, multiple administrations of Dex inhibited the phosphorylation level of p38 mitogen-activated protein kinase and the upregulation of neuroinflammatory factors. Conclusion The results of this study demonstrated that Dex exhibits anti-nociceptive and anti-inflammatory properties in a neuropathic pain model. Moreover, our findings of the CCI model suggested that Dex has an inhibitory effect on TRPC6 expression in the DRG by decreasing the phosphorylation level of p38 in the DRG.
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Affiliation(s)
- Songchao Xu
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
| | - Yusheng Yi
- Department of Algology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
| | - Yanting Wang
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
| | - Pei Wang
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
| | - Yang Zhao
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
| | - Wei Feng
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, People’s Republic of China
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5
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Fernández A, Díaz JL, García M, Rodríguez-Escrich S, Lorente A, Enrech R, Dordal A, Portillo-Salido E, Porras M, Fernández B, Reinoso RF, Vela JM, Almansa C. Piperazinyl Bicyclic Derivatives as Selective Ligands of the α2δ-1 Subunit of Voltage-Gated Calcium Channels. ACS Med Chem Lett 2021; 12:1802-1809. [PMID: 34795870 DOI: 10.1021/acsmedchemlett.1c00416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 10/01/2021] [Indexed: 12/14/2022] Open
Abstract
The synthesis and pharmacological activities of a new series of piperazinyl quinazolin-4-(3H)-one derivatives acting toward the α2δ-1 subunit of voltage-gated calcium channels (Cavα2δ-1) are reported. Different positions of a micromolar HTS hit were explored, and best activities were obtained for compounds containing a small alkyl group in position 3 of the quinazolin-4-(3H)-one scaffold and a 3-methyl-piperazin-1-yl- or 3,5-dimethyl-piperazin-1-yl-butyl group in position 2. The activity was shown to reside in the R enantiomer of the chain in position 2, and several eutomers reached single digit nanomolar affinities. Final modification of the central scaffold to reduce lipophilicity provided the pyrido[4,3-d]pyrimidin-4(3H)-one 16RR, which showed high selectivity for Cavα2δ-1 versus Cavα2δ-2, probably linked to its improved analgesic efficacy-safety ratio in mice over pregabalin.
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Affiliation(s)
- Ariadna Fernández
- Welab Barcelona, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - José Luis Díaz
- Welab Barcelona, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Mónica García
- Welab Barcelona, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | | | - Adriana Lorente
- Welab Barcelona, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Raquel Enrech
- Welab Barcelona, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Albert Dordal
- Welab Barcelona, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | | | - Mónica Porras
- Welab Barcelona, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Begoña Fernández
- Welab Barcelona, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Raquel F. Reinoso
- Welab Barcelona, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - José Miguel Vela
- Welab Barcelona, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
| | - Carmen Almansa
- Welab Barcelona, Parc Científic Barcelona, C/Baldiri Reixac 4-8, 08028 Barcelona, Spain
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Comparative Transcriptome Profiling Reveals Changes of microRNAs Response to Exercise in Rats with Neuropathic Pain. Neural Plast 2021; 2021:5597139. [PMID: 34394340 PMCID: PMC8356008 DOI: 10.1155/2021/5597139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 06/24/2021] [Accepted: 07/16/2021] [Indexed: 11/18/2022] Open
Abstract
There is accumulating evidence showing that exercise therapy may play an active role in peripheral neuropathic pain (NP), but its mechanism is still unclear. Studies have found that microRNAs (miRNAs) may play a role in NP by regulating pain-related target genes. Therefore, we aimed to explore the changes of miRNA and mRNA of dorsal root ganglion (DRG) after NP in response to exercise with transcriptome technology. The chronic constriction injury (CCI) model was established, and rats were randomly allocated into three groups, namely, the sham-operated, CCI, and CCI-exercised groups. L4-L6 DRG tissue was taken for RNA-sequencing, and the differentially expressed genes (DEGs) were determined through bioinformatics analysis. Real-time PCR was used to confirm the accuracy. A total of 4 overlapping differentially expressed miRNAs and 186 overlapping differentially expressed mRNAs were identified in the two comparisons of the sham-operated group versus the CCI group and the CCI group versus the CCI-exercised group. Among these DEGs, miR-145-5p, miR-341, miR-300-5p, miR-653-5p, Atf3, Cacna2d1, Gal, and Ctss related to NP were validated by real-time PCR. DEGs between the CCI and CCI-exercised groups were enriched in HIF-1 signaling pathway, Rap1 signaling pathway, and neurotrophin signaling pathway. This study provides an understanding of the adaptive mechanisms after exercise of NP, and these DEGs in DRG might play a role in NP by stimulating the enriched pathways.
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7
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Kim JY, Abdi S, Huh B, Kim KH. Mirogabalin: could it be the next generation gabapentin or pregabalin? Korean J Pain 2021; 34:4-18. [PMID: 33380563 PMCID: PMC7783847 DOI: 10.3344/kjp.2021.34.1.4] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/15/2020] [Accepted: 12/22/2020] [Indexed: 12/12/2022] Open
Abstract
Except for carbamazepine for trigeminal neuralgia, gabapentinoid anticonvulsants have been the standard for the treatment of neuropathic pain. Pregabalin, which followed gabapentin, was developed with the benefit of rapid peak blood concentration and better bioavailability. Mirogabalin besylate (DS-5565, Tarlige®) shows greater sustained analgesia due to a high affinity to, and slow dissociation from, the α2δ-1 subunits in the dorsal root ganglion (DRG). Additionally, it produces a lower level of central nervous system-specific adverse drug reactions (ADRs), due to a low affinity to, and rapid dissociation from, the α2δ-2 subunits in the cerebellum. Maximum plasma concentration is achieved in less than 1 hour, compared to 1 hour for pregabalin and 3 hours for gabapentin. The plasma protein binding is relatively low, at less than 25%. As with all gabapentinoids, it is also largely excreted via the kidneys in an unchanged form, and so the administration dose should also be adjusted according to renal function. The equianalgesic daily dose for 30 mg of mirogabalin is 600 mg of pregabalin and over 1,200 mg of gabapentin. The initial adult dose starts at 5 mg, given orally twice a day, and is gradually increased by 5 mg at an interval of at least a week, to 15 mg. In conclusion, mirogabalin is anticipated to be a novel, safe gabapentinoid anticonvulsant with a greater therapeutic effect for neuropathic pain in the DRG and lower ADRs in the cerebellum.
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Affiliation(s)
- Jae-Yeon Kim
- Department of Anesthesia and Pain Medicine, Pusan National University School of Medicine, Yangsan, Korea
| | - Salahadin Abdi
- Department of Pain Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Billy Huh
- Department of Pain Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Kyung-Hoon Kim
- Department of Anesthesia and Pain Medicine, Pusan National University School of Medicine, Yangsan, Korea
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Risher WC, Eroglu C. Emerging roles for α2δ subunits in calcium channel function and synaptic connectivity. Curr Opin Neurobiol 2020; 63:162-169. [PMID: 32521436 DOI: 10.1016/j.conb.2020.04.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/29/2020] [Indexed: 12/17/2022]
Abstract
Central nervous system function requires the proper formation and function of synapses. The α2δ auxiliary subunits of voltage-gated calcium channels have emerged as regulators of a number of critical events associated with regulation of synaptic function, including channel trafficking and localization, as well as the initial establishment of synaptic structures. In this review, we will discuss some of these recent studies which have uncovered novel mechanisms for α2δ function at the synapse, including the regulation of calcium channel α1 subunit specificity and the promotion of dendritic spine growth. Moreover, we will cover recent advances that have been made in understanding the consequences of aberrant α2δ signaling in injury and disease.
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Affiliation(s)
- William Christopher Risher
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV 25705, United States.
| | - Cagla Eroglu
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, United States; Department of Neurobiology, Duke University Medical Center, Durham, NC 27710, United States; Duke Institute for Brain Sciences (DIBS), Durham, NC 27710, United States; Regeneration Next Initiative, Duke University, Durham, NC 27710, United States
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Taylor CP, Harris EW. Analgesia with Gabapentin and Pregabalin May Involve N-Methyl-d-Aspartate Receptors, Neurexins, and Thrombospondins. J Pharmacol Exp Ther 2020; 374:161-174. [DOI: 10.1124/jpet.120.266056] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 04/17/2020] [Indexed: 11/22/2022] Open
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10
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Su X, Wu B, Zhang W, Ji YH, Wang Q, Tan ZY. Inhibitory Effects of Columbianadin on Nociceptive Behaviors in a Neuropathic Pain Model, and on Voltage-Gated Calcium Currents in Dorsal Root Ganglion Neurons in Mice. Front Pharmacol 2020; 10:1522. [PMID: 31998126 PMCID: PMC6970200 DOI: 10.3389/fphar.2019.01522] [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: 02/23/2019] [Accepted: 11/25/2019] [Indexed: 12/30/2022] Open
Abstract
Radix angelicae pubescentis (RAP) has been used in Chinese traditional medicine to treat painful diseases such as rheumatism and headache. A previous study has reported that columbianadin (CBN), a major coumarin in RAP inhibits acute and inflammatory pain behaviors. However, the effects of CBN on neuropathic pain behaviors, and the potential underlying mechanism have not been reported. In the present study, the effects of CBN, compared to another major coumarin of RAP osthole (OST), on oxaliplatin-induced neuropathic pain behaviors and on the voltage-gated calcium currents in small dorsal root ganglion (DRG) neurons were studied in mice. It was found that CBN and OST inhibited both mechanical and cold hypersensitivity induced by oxaliplatin. Moreover, CBN and OST might preferentially inhibit T- and L-type calcium currents (Ica). The inhibitory effects of CBN and OST on the oxaliplatin-induced mechanical allodynia were prevented by gabapentin. These results suggest that CBN, as well as OST might inhibit neuropathic pain behaviors through an inhibition of T- and L-type calcium currents in nociceptive DRG neurons.
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Affiliation(s)
- Xiaolin Su
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Harbin, China.,Department of Pharmacology and Toxicology and Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Bin Wu
- Department of Pharmacology and Toxicology and Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, United States.,Institute of Special Environment Medicine, Nantong University, Nantong, China
| | - Wentong Zhang
- Department of Pharmacology and Toxicology and Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Yong-Hua Ji
- Lab of Neuropharmacology and Neurotoxicology, Shanghai University, Shanghai, China
| | - Qiuhong Wang
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Harbin, China.,School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Zhi-Yong Tan
- Department of Pharmacology and Toxicology and Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, United States
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Cdk5-Dependent Phosphorylation of Ca V3.2 T-Type Channels: Possible Role in Nerve Ligation-Induced Neuropathic Allodynia and the Compound Action Potential in Primary Afferent C Fibers. J Neurosci 2019; 40:283-296. [PMID: 31744861 DOI: 10.1523/jneurosci.0181-19.2019] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 11/05/2019] [Accepted: 11/08/2019] [Indexed: 12/13/2022] Open
Abstract
Voltage-gated T-type Ca2+ (CaV3) channels regulate diverse physiological events, including neuronal excitability, and have been linked to several pathological conditions such as absence epilepsy, cardiovascular diseases, and neuropathic pain. It is also acknowledged that calcium/calmodulin-dependent protein kinase II and protein kinases A and C regulate the activity of T-type channels. Interestingly, peripheral nerve injury induces tactile allodynia and upregulates CaV3.2 channels and cyclin-dependent kinase 5 (Cdk5) in dorsal root ganglia (DRG) and spinal dorsal horn. Here, we report that recombinant CaV3.2 channels expressed in HEK293 cells are regulatory targets of Cdk5. Site-directed mutagenesis showed that the relevant sites for this regulation are residues S561 and S1987. We also found that Cdk5 may regulate CaV3.2 channel functional expression in rats with mechanical allodynia induced by spinal nerve ligation (SNL). Consequently, the Cdk5 inhibitor olomoucine affected the compound action potential recorded in the spinal nerves, as well as the paw withdrawal threshold. Likewise, Cdk5 expression was upregulated after SNL in the DRG. These findings unveil a novel mechanism for how phosphorylation may regulate CaV3.2 channels and suggest that increased channel activity by Cdk5-mediated phosphorylation after SNL contributes nerve injury-induced tactile allodynia.SIGNIFICANCE STATEMENT Neuropathic pain is a current public health challenge. It can develop as a result of injury or nerve illness. It is acknowledged that the expression of various ion channels can be altered in neuropathic pain, including T-type Ca2+ channels that are expressed in sensory neurons, where they play a role in the regulation of cellular excitability. The present work shows that the exacerbated expression of Cdk5 in a preclinical model of neuropathic pain increases the functional expression of CaV3.2 channels. This finding is relevant for the understanding of the molecular pathophysiology of the disease. Additionally, this work may have a substantial translational impact, since it describes a novel molecular pathway that could represent an interesting therapeutic alternative for neuropathic pain.
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12
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El-Awaad E, Pryymachuk G, Fried C, Matthes J, Isensee J, Hucho T, Neiss WF, Paulsson M, Herzig S, Zaucke F, Pietsch M. Direct, gabapentin-insensitive interaction of a soluble form of the calcium channel subunit α 2δ-1 with thrombospondin-4. Sci Rep 2019; 9:16272. [PMID: 31700036 PMCID: PMC6838084 DOI: 10.1038/s41598-019-52655-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 10/21/2019] [Indexed: 12/31/2022] Open
Abstract
The α2δ‐1 subunit of voltage-gated calcium channels binds to gabapentin and pregabalin, mediating the analgesic action of these drugs against neuropathic pain. Extracellular matrix proteins from the thrombospondin (TSP) family have been identified as ligands of α2δ‐1 in the CNS. This interaction was found to be crucial for excitatory synaptogenesis and neuronal sensitisation which in turn can be inhibited by gabapentin, suggesting a potential role in the pathogenesis of neuropathic pain. Here, we provide information on the biochemical properties of the direct TSP/α2δ-1 interaction using an ELISA-style ligand binding assay. Our data reveal that full-length pentameric TSP-4, but neither TSP-5/COMP of the pentamer-forming subgroup B nor TSP-2 of the trimer-forming subgroup A directly interact with a soluble variant of α2δ-1 (α2δ-1S). Interestingly, this interaction is not inhibited by gabapentin on a molecular level and is not detectable on the surface of HEK293-EBNA cells over-expressing α2δ‐1 protein. These results provide biochemical evidence that supports a specific role of TSP-4 among the TSPs in mediating the binding to neuronal α2δ‐1 and suggest that gabapentin does not directly target TSP/α2δ-1 interaction to alleviate neuropathic pain.
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Affiliation(s)
- Ehab El-Awaad
- Institute II for Pharmacology, Centre of Pharmacology, Medical Faculty, University of Cologne, Gleueler Str. 24, D-50931, Cologne, Germany.,Department of Pharmacology, Faculty of Medicine, Assiut University, Assiut, 71515, Egypt
| | - Galyna Pryymachuk
- Department of Anatomy I, Medical Faculty, University of Cologne, Kerpener Str. 62, D-50937, Cologne, Germany
| | - Cora Fried
- Institute II for Pharmacology, Centre of Pharmacology, Medical Faculty, University of Cologne, Gleueler Str. 24, D-50931, Cologne, Germany
| | - Jan Matthes
- Institute II for Pharmacology, Centre of Pharmacology, Medical Faculty, University of Cologne, Gleueler Str. 24, D-50931, Cologne, Germany
| | - Jörg Isensee
- Experimental Anaesthesiology and Pain Research, Department of Anaesthesiology and Intensive Care Medicine, Medical Faculty, University of Cologne, Robert-Koch-Str. 10, D-50931, Cologne, Germany
| | - Tim Hucho
- Experimental Anaesthesiology and Pain Research, Department of Anaesthesiology and Intensive Care Medicine, Medical Faculty, University of Cologne, Robert-Koch-Str. 10, D-50931, Cologne, Germany
| | - Wolfram F Neiss
- Department of Anatomy I, Medical Faculty, University of Cologne, Kerpener Str. 62, D-50937, Cologne, Germany
| | - Mats Paulsson
- Institute for Biochemistry II, Centre for Biochemistry, Medical Faculty, University of Cologne, Joseph-Stelzmann-Str. 52, D-50931, Cologne, Germany.,Centre for Molecular Medicine Cologne (CMMC), University of Cologne, Robert-Koch-Str. 21, D-50931, Cologne, Germany
| | - Stefan Herzig
- Institute II for Pharmacology, Centre of Pharmacology, Medical Faculty, University of Cologne, Gleueler Str. 24, D-50931, Cologne, Germany.,President of TH Köln, TH Köln (University of Applied Sciences), Claudiusstr. 1, D-50678, Cologne, Germany
| | - Frank Zaucke
- Institute for Biochemistry II, Centre for Biochemistry, Medical Faculty, University of Cologne, Joseph-Stelzmann-Str. 52, D-50931, Cologne, Germany.,Dr. Rolf M. Schwiete Research Unit for Osteoarthritis, Orthopedic University Hospital, Friedrichsheim gGmbH, Marienburgstr. 2, D-60528, Frankfurt/Main, Germany
| | - Markus Pietsch
- Institute II for Pharmacology, Centre of Pharmacology, Medical Faculty, University of Cologne, Gleueler Str. 24, D-50931, Cologne, Germany.
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Functional Reorganization of Local Circuit Connectivity in Superficial Spinal Dorsal Horn with Neuropathic Pain States. eNeuro 2019; 6:ENEURO.0272-19.2019. [PMID: 31533959 PMCID: PMC6787342 DOI: 10.1523/eneuro.0272-19.2019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 08/27/2019] [Accepted: 09/05/2019] [Indexed: 01/12/2023] Open
Abstract
The spinal dorsal horn is the first relay structure coding for pain transmission and modulation. Previous anatomical and electrophysiological studies have examined spinal dorsal horn circuit connections and network activity. Further work is required to understand spinal cord sensory information processing that underlies pathological neuropathic pain states. Our previous studies suggest that peripheral nerve injury enhances presynaptic excitatory input onto spinal superficial dorsal horn neurons, which in turn contributes to pathologic nociception. The potential changes in local postsynaptic circuits in the dorsal horn that lead to pathologically heightened behavioral responses to pain remain largely unexplored. We combined whole-cell electrophysiological recordings with laser-scanning photostimulation to test whether peripheral nerve injury in the spinal nerve ligation (SNL) mouse model of neuropathic pain leads to alterations in the functional connectivity of spinal cord circuits including lamina II excitatory interneurons. Here we show that SNL enhances excitation and decreases inhibition to lamina II excitatory interneurons along with their increased glutamate-evoked excitability. The enhanced excitatory postsynaptic input and connectivity evoked by SNL eventually return to normal levels concurrently with the resolution of the neuropathic pain states. The physiological pattern highly correlates with mouse pain behaviors following SNL, supporting a neurophysiological mechanism of central sensitization and neuropathic pain that is functionally localized to the spinal dorsal horn. Together, these data support that SNL induces functional changes in synaptic input and connectivity to lamina II excitatory interneurons that code for pain perception, and thus provide new insights into the mechanism and locus of pain hypersensitivity.
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Karateev AE, Nasonov EL. Chronic pain and central sensitization in immuno-inflammatory rheumatic diseases: pathogenesis, clinical manifestations, the possibility of using targeted disease modifying antirheumatic drugs. RHEUMATOLOGY SCIENCE AND PRACTICE 2019. [DOI: 10.14412/1995-4484-2019-197-209] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Chronic pain is one of the main manifestations of immuno-inflammatory rheumatic diseases (IIRD), such as rheumatoid arthritis (RA) and psoriatic arthritis (PsA), which determines the severity of suffering, reduced quality of life and disability of patients. Unfortunately, the use of synthetic and biological disease modifying antirheumatic drugs, as well as non-steroidal anti-inflammatory drugs does not always provide sufficient control of pain in IIRD, even when it is possible to achieve a significant reduction in inflammatory activity. The reason for this is the complex mechanism of chronic pain. It includes not onlystimulation of pain receptors caused by damage of the elements of the musculoskeletal system, but also a change in the perception of pain associated with the phenomenon of central sensitization (CS). CS is characterized by a significant and persistent increase in the sensitivity of nociceptive neurons to pain and nonpain stimuli. One of the main theories of the CS development consider this phenomenon as an inflammatory reaction of the neuronenvironmentthe activation of astrocytes and microglial cells, local hyperproduction of cytokines, inflammatory mediators and neurotrophic factors. Factors contributing to the development of CS in IIRD are obesity, depression and anxiety, damage of the somatosensory system, insufficient relief of pain in the onset of the disease. Clinical manifestations of CS in IIRD is hyperalgesia, allodinia, «expanded pain» and secondary fibromyalgia. An important role in the development of chronic pain and CS plays the intracellular inflammatory pathway JAK-STAT. Therefore, JAK inhibitors, such as tofacitinib, used in RA and PsA, can also be considered as an effective means of controlling chronic pain in these diseases.
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Affiliation(s)
| | - E. L. Nasonov
- V.A. Nasonova Research Institute of Rheumatology; I.M. Sechenov First Moscow State Medical University (Sechenov University), Ministry of Health of Russia
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Getting a handle on Ca V2.2 (N-type) voltage-gated Ca 2+ channels. Proc Natl Acad Sci U S A 2018; 115:12848-12850. [PMID: 30538200 DOI: 10.1073/pnas.1818608115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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16
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Yin D, Chen Y, Lu R, Fan B, Zhu S, Xu X, Xu Z. Translocation Associated Membrane Protein 1 Contributes to Chronic Constriction Injury-Induced Neuropathic Pain in the Dorsal Root Ganglion and Spinal Cord in Rats. J Mol Neurosci 2018; 66:535-546. [PMID: 30338452 DOI: 10.1007/s12031-018-1187-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Accepted: 09/25/2018] [Indexed: 11/30/2022]
Abstract
Neuropathic pain is a severe debilitating state caused by injury or dysfunction of somatosensory nervous system, and the clinical treatment is still challenging. Translocation associated membrane protein 1 (TRAM1), an adapter protein, participates in a variety of transduction pathways and mediates the biological functions such as cell proliferation, activation, and differentiation. However, whether TRAM1 is involved in the pathogenesis of neuropathic pain is still unclear. In our study, we reported the role of TRAM1 in the maintenance of neuropathic pain induced by chronic constriction injury (CCI) on rats. By western blot and staining, we found that TRAM1 increased in the dorsal root ganglion (DRG) neurons and spinal cord (SC) neurons after CCI. Being similar to IB4-, CGRP-positive expressed area, TRAM1 also expressed in the superficial laminae of the spinal cord dorsal horn (SCDH), suggesting it was related to the innervations of the primary afferents. Moreover, intrathecal injection of TRAM1 siRNA or Toll-like receptor 4 (TLR4) inhibitor induced low expression of TRAM1 in SC, which alleviated the pain response induced by CCI. The upregulation of p-NF-κB expression was reversed by TRAM1 siRNA in SC and DRG, and intrathecal injection of p-NF-κB inhibitor relieved neuropathic pain. All the data indicated that TRAM1 could take part in CCI-induced pain and might be a potential treatment for chronic neuropathic pain.
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Affiliation(s)
- Dekun Yin
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, 226001, China
- Department of Anesthesiology, Funing People's Hospital of Jiangsu, Funing County, 224400, Jiangsu Province, China
| | - Yonglin Chen
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Rongxiang Lu
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Bingbing Fan
- Department of Radiology, Zhongshan Hospital and Shanghai Institute of Medical Imaging, Department of Medical Imaging, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Shunxing Zhu
- Laboratory Animal Center, Nantong University, Nantong, 226001, China
| | - Xingguo Xu
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, 226001, China.
| | - Zhongling Xu
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, 226001, China.
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17
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Stevens EB, Stephens GJ. Recent advances in targeting ion channels to treat chronic pain. Br J Pharmacol 2018; 175:2133-2137. [PMID: 29878335 PMCID: PMC5980455 DOI: 10.1111/bph.14215] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
LINKED ARTICLES This article is part of a themed section on Recent Advances in Targeting Ion Channels to Treat Chronic Pain. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v175.12/issuetoc.
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18
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Silva RBM, Greggio S, Venturin GT, da Costa JC, Gomez MV, Campos MM. Beneficial Effects of the Calcium Channel Blocker CTK 01512-2 in a Mouse Model of Multiple Sclerosis. Mol Neurobiol 2018; 55:9307-9327. [PMID: 29667130 DOI: 10.1007/s12035-018-1049-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 03/27/2018] [Indexed: 12/30/2022]
Abstract
Voltage-gated calcium channels (VGCCs) play a critical role in neuroinflammatory diseases, such as multiple sclerosis (MS). CTK 01512-2 is a recombinant version of the peptide Phα1β derived from the spider Phoneutria nigriventer, which inhibits N-type VGCC/TRPA1-mediated calcium influx. We investigated the effects of this molecule in the mouse model of experimental autoimmune encephalomyelitis (EAE). The effects of CTK 01512-2 were compared to those displayed by ziconotide-a selective N-type VGCC blocker clinically used for chronic pain-and fingolimod-a drug employed for MS treatment. The intrathecal (i.t.) treatment with CTK 01512-2 displayed beneficial effects, by preventing nociception, body weight loss, splenomegaly, MS-like clinical and neurological scores, impaired motor coordination, and memory deficits, with an efficacy comparable to that observed for ziconotide and fingolimod. This molecule displayed a favorable profile on EAE-induced neuroinflammatory changes, including inflammatory infiltrate, demyelination, pro-inflammatory cytokine production, glial activation, and glucose metabolism in the brain and spinal cord. The recovery of spatial memory, besides a reduction of serum leptin levels, allied to central and peripheral elevation of the anti-inflammatory cytokine IL-10, was solely modulated by CTK 01512-2, dosed intrathecally. The intravenous (i.v.) administration of CTK 01512-2 also reduced the EAE-elicited MS-like symptoms, similarly to that seen in animals that received fingolimod orally. Ziconotide lacked any significant effect when dosed by i.v. route. Our results indicate that CTK 01512-2 greatly improved the neuroinflammatory responses in a mouse model of MS, with a higher efficacy when compared to ziconotide, pointing out this molecule as a promising adjuvant for MS management.
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Affiliation(s)
- Rodrigo B M Silva
- Escola de Medicina, Programa de Pós-Graduação em Medicina e Ciências da Saúde, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, 90619-900, Brazil.,Escola de Ciências da Saúde, Centro de Toxicologia e Farmacologia, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Avenida Ipiranga, 6681, Porto Alegre, RS, 90619-900, Brazil
| | - Samuel Greggio
- Centro de Pesquisa Pré-Clínica, Instituto do Cérebro do Rio Grande do Sul - Brain Institute (BraIns), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, 90610-000, Brazil.,Escola de Ciências da Saúde, Curso de Graduação em Biomedicina, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, 90619-900, Brazil
| | - Gianina T Venturin
- Centro de Pesquisa Pré-Clínica, Instituto do Cérebro do Rio Grande do Sul - Brain Institute (BraIns), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, 90610-000, Brazil
| | - Jaderson C da Costa
- Centro de Pesquisa Pré-Clínica, Instituto do Cérebro do Rio Grande do Sul - Brain Institute (BraIns), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, 90610-000, Brazil
| | - Marcus V Gomez
- Núcleo de Pós-Graduação, Instituto de Ensino e Pesquisa da Santa Casa de Belo Horizonte, Belo Horizonte, 30150-240, Brazil
| | - Maria M Campos
- Escola de Medicina, Programa de Pós-Graduação em Medicina e Ciências da Saúde, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, 90619-900, Brazil. .,Escola de Ciências da Saúde, Centro de Toxicologia e Farmacologia, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Avenida Ipiranga, 6681, Porto Alegre, RS, 90619-900, Brazil. .,Escola de Ciências da Saúde, Curso de Graduação em Odontologia, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, 90619-900, Brazil. .,Escola de Ciências da Saúde, Programa de Pós-Graduação em Odontologia, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, 90619-900, Brazil.
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