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Xie MX, Rao JH, Tian XY, Liu JK, Li X, Chen ZY, Cao Y, Chen AN, Shu HH, Zhang XL. ATF4 inhibits TRPV4 function and controls itch perception in rodents and nonhuman primates. Pain 2024; 165:1840-1859. [PMID: 38422489 DOI: 10.1097/j.pain.0000000000003189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 01/03/2024] [Indexed: 03/02/2024]
Abstract
ABSTRACT Acute and chronic itch are prevalent and incapacitating, yet the neural mechanisms underlying both acute and chronic itch are just starting to be unraveled. Activated transcription factor 4 (ATF4) belongs to the ATF/CREB transcription factor family and primarily participates in the regulation of gene transcription. Our previous study has demonstrated that ATF4 is expressed in sensory neurons. Nevertheless, the role of ATF4 in itch sensation remains poorly understood. Here, we demonstrate that ATF4 plays a significant role in regulating itch sensation. The absence of ATF4 in dorsal root ganglion (DRG) neurons enhances the itch sensitivity of mice. Overexpression of ATF4 in sensory neurons significantly alleviates the acute and chronic pruritus in mice. Furthermore, ATF4 interacts with the transient receptor potential cation channel subfamily V member 4 (TRPV4) and inhibits its function without altering the expression or membrane trafficking of TRPV4 in sensory neurons. In addition, interference with ATF4 increases the itch sensitivity in nonhuman primates and enhances TRPV4 currents in nonhuman primates DRG neurons; ATF4 and TRPV4 also co-expresses in human sensory neurons. Our data demonstrate that ATF4 controls pruritus by regulating TRPV4 signaling through a nontranscriptional mechanism and identifies a potential new strategy for the treatment of pathological pruritus.
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Affiliation(s)
- Man-Xiu Xie
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Guangzhou, China
| | - Jun-Hua Rao
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou, China
| | - Xiao-Yu Tian
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Jin-Kun Liu
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Guangzhou, China
| | - Xiao Li
- College of Food Science and Technology, Hainan University, Haikou, China
| | - Zi-Yi Chen
- Zhongshan School of Medicine of Sun Yat-sen University, Guangzhou, China
| | - Yan Cao
- College of Food Science and Technology, Hainan University, Haikou, China
| | - An-Nan Chen
- Zhongshan School of Medicine of Sun Yat-sen University, Guangzhou, China
| | - Hai-Hua Shu
- Department of Anesthesiology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Xiao-Long Zhang
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
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Xie MX, Lai RC, Xiao YB, Zhang X, Cao XY, Tian XY, Chen AN, Chen ZY, Cao Y, Li X, Zhang XL. Endophilin A2 controls touch and mechanical allodynia via kinesin-mediated Piezo2 trafficking. Mil Med Res 2024; 11:17. [PMID: 38475827 DOI: 10.1186/s40779-024-00520-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 02/02/2024] [Indexed: 03/14/2024] Open
Abstract
BACKGROUND Tactile and mechanical pain are crucial to our interaction with the environment, yet the underpinning molecular mechanism is still elusive. Endophilin A2 (EndoA2) is an evolutionarily conserved protein that is documented in the endocytosis pathway. However, the role of EndoA2 in the regulation of mechanical sensitivity and its underlying mechanisms are currently unclear. METHODS Male and female C57BL/6 mice (8-12 weeks) and male cynomolgus monkeys (7-10 years old) were used in our experiments. Nerve injury-, inflammatory-, and chemotherapy-induced pathological pain models were established for this study. Behavioral tests of touch, mechanical pain, heat pain, and cold pain were performed in mice and nonhuman primates. Western blotting, immunostaining, co-immunoprecipitation, proximity ligation and patch-clamp recordings were performed to gain insight into the mechanisms. RESULTS The results showed that EndoA2 was primarily distributed in neurofilament-200-positive (NF200+) medium-to-large diameter dorsal root ganglion (DRG) neurons of mice and humans. Loss of EndoA2 in mouse NF200+ DRG neurons selectively impaired the tactile and mechanical allodynia. Furthermore, EndoA2 interacted with the mechanically sensitive ion channel Piezo2 and promoted the membrane trafficking of Piezo2 in DRG neurons. Moreover, as an adaptor protein, EndoA2 also bound to kinesin family member 5B (KIF5B), which was involved in the EndoA2-mediated membrane trafficking process of Piezo2. Loss of EndoA2 in mouse DRG neurons damaged Piezo2-mediated rapidly adapting mechanically activated currents, and re-expression of EndoA2 rescued the MA currents. In addition, interference with EndoA2 also suppressed touch sensitivity and mechanical hypersensitivity in nonhuman primates. CONCLUSIONS Our data reveal that the KIF5B/EndoA2/Piezo2 complex is essential for Piezo2 trafficking and for sustaining transmission of touch and mechanical hypersensitivity signals. EndoA2 regulates touch and mechanical allodynia via kinesin-mediated Piezo2 trafficking in sensory neurons. Our findings identify a potential new target for the treatment of mechanical pain.
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Affiliation(s)
- Man-Xiu Xie
- Department of Anesthesiology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Guangzhou, 510060, China
| | - Ren-Chun Lai
- Department of Anesthesiology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Guangzhou, 510060, China
| | - Yi-Bin Xiao
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
- Pain Research Center and Department of Physiology, Zhongshan School of Medicine of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Xi Zhang
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
- Pain Research Center and Department of Physiology, Zhongshan School of Medicine of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Xian-Ying Cao
- Engineering Technology Research Center for Elderly Health Management in Hainan Province, Haikou, 571137, China
- College of Food Science and Technology, Hainan University, Haikou, 570228, China
| | - Xiao-Yu Tian
- College of Food Science and Technology, Hainan University, Haikou, 570228, China
| | - An-Nan Chen
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
- Pain Research Center and Department of Physiology, Zhongshan School of Medicine of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Zi-Yi Chen
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
- Pain Research Center and Department of Physiology, Zhongshan School of Medicine of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Yan Cao
- College of Food Science and Technology, Hainan University, Haikou, 570228, China
| | - Xiao Li
- College of Food Science and Technology, Hainan University, Haikou, 570228, China
| | - Xiao-Long Zhang
- Medical Research Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China.
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3
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Tyagi S, Higerd-Rusli GP, Ghovanloo MR, Dib-Hajj F, Zhao P, Liu S, Kim DH, Shim JS, Park KS, Waxman SG, Choi JS, Dib-Hajj SD. Compartment-specific regulation of Na V1.7 in sensory neurons after acute exposure to TNF-α. Cell Rep 2024; 43:113685. [PMID: 38261513 PMCID: PMC10947185 DOI: 10.1016/j.celrep.2024.113685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 11/09/2023] [Accepted: 01/02/2024] [Indexed: 01/25/2024] Open
Abstract
Tumor necrosis factor α (TNF-α) is a major pro-inflammatory cytokine, important in many diseases, that sensitizes nociceptors through its action on a variety of ion channels, including voltage-gated sodium (NaV) channels. We show here that TNF-α acutely upregulates sensory neuron excitability and current density of threshold channel NaV1.7. Using electrophysiological recordings and live imaging, we demonstrate that this effect on NaV1.7 is mediated by p38 MAPK and identify serine 110 in the channel's N terminus as the phospho-acceptor site, which triggers NaV1.7 channel insertion into the somatic membrane. We also show that the N terminus of NaV1.7 is sufficient to mediate this effect. Although acute TNF-α treatment increases NaV1.7-carrying vesicle accumulation at axonal endings, we did not observe increased channel insertion into the axonal membrane. These results identify molecular determinants of TNF-α-mediated regulation of NaV1.7 in sensory neurons and demonstrate compartment-specific effects of TNF-α on channel insertion in the neuronal plasma membrane.
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Affiliation(s)
- Sidharth Tyagi
- Medical Scientist Training Program, Yale School of Medicine, New Haven, CT 06511, USA; Center for Neuroscience and Regeneration Research, West Haven, CT 06516, USA; Department of Neurology, Yale School of Medicine, New Haven, CT 06516, USA; Center for Restoration of Nervous System Function, VA Connecticut Healthcare System, West Haven, CT 06516, USA.
| | - Grant P Higerd-Rusli
- Medical Scientist Training Program, Yale School of Medicine, New Haven, CT 06511, USA; Center for Neuroscience and Regeneration Research, West Haven, CT 06516, USA; Department of Neurology, Yale School of Medicine, New Haven, CT 06516, USA; Center for Restoration of Nervous System Function, VA Connecticut Healthcare System, West Haven, CT 06516, USA
| | - Mohammad-Reza Ghovanloo
- Center for Neuroscience and Regeneration Research, West Haven, CT 06516, USA; Department of Neurology, Yale School of Medicine, New Haven, CT 06516, USA; Center for Restoration of Nervous System Function, VA Connecticut Healthcare System, West Haven, CT 06516, USA
| | - Fadia Dib-Hajj
- Center for Neuroscience and Regeneration Research, West Haven, CT 06516, USA; Department of Neurology, Yale School of Medicine, New Haven, CT 06516, USA; Center for Restoration of Nervous System Function, VA Connecticut Healthcare System, West Haven, CT 06516, USA
| | - Peng Zhao
- Center for Neuroscience and Regeneration Research, West Haven, CT 06516, USA; Department of Neurology, Yale School of Medicine, New Haven, CT 06516, USA; Center for Restoration of Nervous System Function, VA Connecticut Healthcare System, West Haven, CT 06516, USA
| | - Shujun Liu
- Center for Neuroscience and Regeneration Research, West Haven, CT 06516, USA; Department of Neurology, Yale School of Medicine, New Haven, CT 06516, USA; Center for Restoration of Nervous System Function, VA Connecticut Healthcare System, West Haven, CT 06516, USA
| | - Dong-Hyun Kim
- Integrated Research Institute of Pharmaceutical Science, College of Pharmacy, The Catholic University of Korea, Bucheon 14662, South Korea; New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, South Korea
| | - Ji Seon Shim
- Department of Physiology, Kyung Hee University School of Medicine, Seoul 02447, South Korea
| | - Kang-Sik Park
- Department of Physiology, Kyung Hee University School of Medicine, Seoul 02447, South Korea
| | - Stephen G Waxman
- Center for Neuroscience and Regeneration Research, West Haven, CT 06516, USA; Department of Neurology, Yale School of Medicine, New Haven, CT 06516, USA; Center for Restoration of Nervous System Function, VA Connecticut Healthcare System, West Haven, CT 06516, USA.
| | - Jin-Sung Choi
- Integrated Research Institute of Pharmaceutical Science, College of Pharmacy, The Catholic University of Korea, Bucheon 14662, South Korea.
| | - Sulayman D Dib-Hajj
- Center for Neuroscience and Regeneration Research, West Haven, CT 06516, USA; Department of Neurology, Yale School of Medicine, New Haven, CT 06516, USA; Center for Restoration of Nervous System Function, VA Connecticut Healthcare System, West Haven, CT 06516, USA.
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4
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Li Q, Li J. NGF contributes to activities of acid-sensing ion channels in dorsal root ganglion neurons of male rats with experimental peripheral artery disease. Physiol Rep 2024; 12:e15933. [PMID: 38312021 PMCID: PMC10839628 DOI: 10.14814/phy2.15933] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/15/2024] [Accepted: 01/15/2024] [Indexed: 02/06/2024] Open
Abstract
A feature of peripheral artery diseases (PAD) includes limb ischemia/reperfusion (I/R) and ischemia. Both I/R and ischemia amplify muscle afferent nerve-activated reflex sympathetic nervous and blood pressure responses (termed as exercise pressor reflex). Nevertheless, the underlying mechanisms responsible for the exaggerated autonomic responses in PAD are undetermined. Previous studies suggest that acid-sensing ion channels (ASICs) in muscle dorsal root ganglion (DRG) play a leading role in regulating the exercise pressor reflex in PAD. Thus, we determined if signaling pathways of nerve growth factor (NGF) contribute to the activities of ASICs in muscle DRG neurons of PAD. In particular, we examined ASIC1a and ASIC3 currents in isolectin B4 -negative muscle DRG neurons, a distinct subpopulation depending on NGF for survival. Hindlimb I/R and ischemia were obtained in male rats. In results, femoral artery occlusion increased the levels of NGF and NGF-stimulated TrkA receptor in DRGs, whereas they led to upregulation of ASIC3 but not ASIC1a. In addition, application of NGF onto DRG neurons increased the density of ASIC3 currents and the effect of NGF was significantly attenuated by TrkA antagonist GW441756. Moreover, the enhancing effect of NGF on the density of ASIC3-like currents was decreased by the respective inhibition of intracellular signaling pathways, namely JNK and NF-κB, by antagonists SP600125 and PDTC. Our results suggest contribution of NGF to the activities of ASIC3 currents via JNK and NF-κB signaling pathways in association with the exercise pressor reflex in experimental PAD.
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Affiliation(s)
- Qin Li
- Heart and Vascular InstituteThe Pennsylvania State University College of MedicineHersheyPennsylvaniaUSA
| | - Jianhua Li
- Heart and Vascular InstituteThe Pennsylvania State University College of MedicineHersheyPennsylvaniaUSA
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5
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Atkinson NS. The Role of Toll and Nonnuclear NF-κB Signaling in the Response to Alcohol. Cells 2023; 12:1508. [PMID: 37296629 PMCID: PMC10252657 DOI: 10.3390/cells12111508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/23/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
An understanding of neuroimmune signaling has become central to a description of how alcohol causes addiction and how it damages people with an AUD. It is well known that the neuroimmune system influences neural activity via changes in gene expression. This review discusses the roles played by CNS Toll-like receptor (TLR) signaling in the response to alcohol. Also discussed are observations in Drosophila that show how TLR signaling pathways can be co-opted by the nervous system and potentially shape behavior to a far greater extent and in ways different than generally recognized. For example, in Drosophila, TLRs substitute for neurotrophin receptors and an NF-κB at the end of a TLR pathway influences alcohol responsivity by acting non-genomically.
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Affiliation(s)
- Nigel S Atkinson
- Department of Neuroscience and The Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, USA
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6
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Liu XG. Normalization of Neuroinflammation: A New Strategy for Treatment of Persistent Pain and Memory/Emotional Deficits in Chronic Pain. J Inflamm Res 2022; 15:5201-5233. [PMID: 36110505 PMCID: PMC9469940 DOI: 10.2147/jir.s379093] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 08/18/2022] [Indexed: 12/12/2022] Open
Abstract
Chronic pain, which affects around 1/3 of the world population and is often comorbid with memory deficit and mood depression, is a leading source of suffering and disability. Studies in past decades have shown that hyperexcitability of primary sensory neurons resulting from abnormal expression of ion channels and central sensitization mediated pathological synaptic plasticity, such as long-term potentiation in spinal dorsal horn, underlie the persistent pain. The memory/emotional deficits are associated with impaired synaptic connectivity in hippocampus. Dysregulation of numerous endogenous proteins including receptors and intracellular signaling molecules is involved in the pathological processes. However, increasing knowledge contributes little to clinical treatment. Emerging evidence has demonstrated that the neuroinflammation, characterized by overproduction of pro-inflammatory cytokines and glial activation, is reliably detected in humans and animals with chronic pain, and is sufficient to induce persistent pain and memory/emotional deficits. The abnormal expression of ion channels and pathological synaptic plasticity in spinal dorsal horn and in hippocampus are resulting from neuroinflammation. The neuroinflammation is initiated and maintained by the interactions of circulating monocytes, glial cells and neurons. Obviously, unlike infectious diseases and cancer, which are caused by pathogens or malignant cells, chronic pain is resulting from alterations of cells and molecules which have numerous physiological functions. Therefore, normalization (counterbalance) but not simple inhibition of the neuroinflammation is the right strategy for treating neuronal disorders. Currently, no such agent is available in clinic. While experimental studies have demonstrated that intracellular Mg2+ deficiency is a common feature of chronic pain in animal models and supplement Mg2+ are capable of normalizing the neuroinflammation, activation of upregulated proteins that promote recovery, such as translocator protein (18k Da) or liver X receptors, has a similar effect. In this article, relevant experimental and clinical evidence is reviewed and discussed.
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Affiliation(s)
- Xian-Guo Liu
- Pain Research Center and Department of Physiology, Zhongshan School of Medicine of Sun Yat-sen University, Guangzhou, People's Republic of China
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7
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Neuroimmune Mechanisms Underlying Neuropathic Pain: The Potential Role of TNF-α-Necroptosis Pathway. Int J Mol Sci 2022; 23:ijms23137191. [PMID: 35806192 PMCID: PMC9266916 DOI: 10.3390/ijms23137191] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/24/2022] [Accepted: 06/27/2022] [Indexed: 02/05/2023] Open
Abstract
The neuroimmune mechanism underlying neuropathic pain has been extensively studied. Tumor necrosis factor-alpha (TNF-α), a key pro-inflammatory cytokine that drives cytokine storm and stimulates a cascade of other cytokines in pain-related pathways, induces and modulates neuropathic pain by facilitating peripheral (primary afferents) and central (spinal cord) sensitization. Functionally, TNF-α controls the balance between cell survival and death by inducing an inflammatory response and two programmed cell death mechanisms (apoptosis and necroptosis). Necroptosis, a novel form of programmed cell death, is receiving increasing attraction and may trigger neuroinflammation to promote neuropathic pain. Chronic pain is often accompanied by adverse pain-associated emotional reactions and cognitive disorders. Overproduction of TNF-α in supraspinal structures such as the anterior cingulate cortex (ACC) and hippocampus plays an important role in pain-associated emotional disorders and memory deficits and also participates in the modulation of pain transduction. At present, studies reporting on the role of the TNF-α–necroptosis pathway in pain-related disorders are lacking. This review indicates the important research prospects of this pathway in pain modulation based on its role in anxiety, depression and memory deficits associated with other neurodegenerative diseases. In addition, we have summarized studies related to the underlying mechanisms of neuropathic pain mediated by TNF-α and discussed the role of the TNF-α–necroptosis pathway in detail, which may represent an avenue for future therapeutic intervention.
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Behrendt M. TRPM3 in the eye and in the nervous system - from new findings to novel mechanisms. Biol Chem 2022; 403:859-868. [PMID: 35240732 DOI: 10.1515/hsz-2021-0403] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 02/10/2022] [Indexed: 01/13/2023]
Abstract
The calcium-permeable cation channel TRPM3 can be activated by heat and the endogenous steroid pregnenolone sulfate. TRPM3's best understood function is its role as a peripheral noxious heat sensor in mice. However, the channel is expressed in various tissues and cell types including neurons as well as glial and epithelial cells. TRPM3 expression patterns differ between species and change during development. Furthermore, a plethora of TRPM3 variants that result from alternative splicing have been identified and the majority of these isoforms are yet to be characterized. Moreover, the mechanisms underlying regulation of TRPM3 are largely unexplored. In addition, a micro-RNA gene (miR-204) is located within the TRPM3 gene. This complexity makes it difficult to obtain a clear picture of TRPM3 characteristics. However, a clear picture is needed to unravel TRPM3's full potential as experimental tool, diagnostic marker and therapeutic target. Therefore, the newest data related to TRPM3 have to be discussed and to be put in context as soon as possible to be up-to-date and to accelerate the translation from bench to bedside. The aim of this review is to highlight recent results and developments with particular focus on findings from studies involving ocular tissues and cells or peripheral neurons of rodents and humans.
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Affiliation(s)
- Marc Behrendt
- Department of Experimental Pain Research, Medical Faculty Mannheim, University of Heidelberg, Ludolf-Krehl-Str. 13-17, D-68167 Mannheim, Germany
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9
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Olaseinde OF, Owoyele BV. Chondroitin and glucosamine sulphate reduced proinflammatory molecules in the DRG and improved axonal function of injured sciatic nerve of rats. Sci Rep 2022; 12:3196. [PMID: 35210446 PMCID: PMC8873476 DOI: 10.1038/s41598-022-06554-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 01/21/2022] [Indexed: 11/09/2022] Open
Abstract
Neuropathic pain (NP) is an abnormality resulting from lesion or damage to parts of the somatosensory nervous system. It is linked to defective quality of life and often poorly managed. Due to the limited number of approved drugs, limited efficacy and side effects associated with the approved drugs, drugs or drug combinations with great efficacy and very minimal or no side effects will be of great advantage in managing NP. This study aimed at investigating the synergistic antinociceptive effects of the combination of glucosamine sulphate (GS) (240 mg/kg) and chondroitin sulphate (CS) (900 mg/kg) in chronic constriction injury (CCI)-induced neuropathy in rats. Forty-two Wistar rats were randomly distributed into seven groups (n = 6). Sciatic nerve was ligated with four loose ligatures to induce NP. Effects of drugs were examined on stimulus and non-stimulus evoked potentials, expression of dorsal root ganglia (DRG) pain modulators and structural architecture of DRG. Oral administration of GS and CS for 21 days reduced hyperalgesia, allodynia, sciatic nerve functional aberration and DRG pain modulators. Histopathology and immunohistochemistry revealed restoration of structural integrity of DRG. Our result showed that the combination of GS and CS produced antinociceptive effects by attenuating hyperalgesia, allodynia and downregulation of NP mediators. GS and CS additionally produced synergistic analgesic effect over its individual components.
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Affiliation(s)
- Olutayo Folajimi Olaseinde
- Neuroscience and Inflammation Unit, Department of Physiology, College of Health Sciences, University of Ilorin, Ilorin, Kwara, Nigeria.
| | - Bamidele Victor Owoyele
- Neuroscience and Inflammation Unit, Department of Physiology, College of Health Sciences, University of Ilorin, Ilorin, Kwara, Nigeria.
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10
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Zhang J, Mai CL, Xiong Y, Lin ZJ, Jie YT, Mai JZ, Liu C, Xie MX, Zhou X, Liu XG. The Causal Role of Magnesium Deficiency in the Neuroinflammation, Pain Hypersensitivity and Memory/Emotional Deficits in Ovariectomized and Aged Female Mice. J Inflamm Res 2021; 14:6633-6656. [PMID: 34908863 PMCID: PMC8665878 DOI: 10.2147/jir.s330894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 11/15/2021] [Indexed: 12/15/2022] Open
Abstract
Purpose Postmenopausal women often suffer from chronic pain, memory decline and mood depression. The mechanisms underlying the neuronal disorders are not fully understood, and effective treatment is still lacking. Methods Oral administration of magnesium-L-threonate was tested to treat the neuronal disorders in ovariectomized and aged female mice. The pain hypersensitivity, memory function and depression-like behaviors were measured with a set of behavioral tests. Western blots, immunochemistry and in situ hybridization were used to assess molecular changes. Results Chronic oral administration of magnesium-L-threonate substantially prevented or reversed the chronic pain and memory/emotional deficits in both ovariectomized and aged female mice. We found that phospho-p65, an active form of nuclear factor-kappaB, tumor necrosis factor-alpha and interleukin-1 beta were significantly upregulated in the neurons of dorsal root ganglion, spinal dorsal horn and hippocampus in ovariectomized and aged mice. The microglia and astrocytes were activated in spinal dorsal horn and hippocampus. Calcitonin gene–related peptide, a marker for peptidergic C-fibers, was upregulated in dorsal horn, which is associated with potentiation of C-fiber-mediated synaptic transmission in the model mice. In parallel with neuroinflammation and synaptic potentiation, free Mg2+ levels in plasma, cerebrospinal fluid and in dorsal root ganglion neurons were significantly reduced. Oral magnesium-L-threonate normalized the neuroinflammation, synaptic potentiation and Mg2+ deficiency, but did not affect the estrogen decline in ovariectomized and aged mice. Furthermore, in cultured dorsal root ganglion neurons, estrogen at physiological concentration elevated intracellular Mg2+, and downregulated phospho-p65, tumor necrosis factor-alpha and interleukin-1 beta exclusively in the presence of extracellular Mg2+. Conclusion Estrogen decline in menopause may cause neuroinflammation by reducing intracellular Mg2+ in neurons, leading to chronic pain, memory/emotional deficits. Supplement Mg2+ by oral magnesium-L-threonate may be a novel approach for treating menopause-related neuronal disorders.
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Affiliation(s)
- Jun Zhang
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, People's Republic of China.,Department of Anesthesiology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, People's Republic of China.,Guangdong Cardiovascular Institute, Guangzhou, 510080, People's Republic of China
| | - Chun-Lin Mai
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, People's Republic of China
| | - Ying Xiong
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, People's Republic of China
| | - Zhen-Jia Lin
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, People's Republic of China
| | - Ying-Tao Jie
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, People's Republic of China
| | - Jie-Zhen Mai
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, People's Republic of China
| | - Chong Liu
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, People's Republic of China
| | - Man-Xiu Xie
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, People's Republic of China
| | - Xin Zhou
- Department of Anesthesiology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, People's Republic of China.,Guangdong Cardiovascular Institute, Guangzhou, 510080, People's Republic of China
| | - Xian-Guo Liu
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, People's Republic of China.,Department of Anesthesiology, Guangdong Second Provincial Central Hospital, Guangzhou, 510317, People's Republic of China.,Guangdong Province Key Laboratory of Brain Function and Disease, Guangzhou, 510080, People's Republic of China
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11
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Han X, Shao J, Ren X, Li Y, Yu W, Lin C, Li L, Sun Y, Xu B, Luo H, Zhu C, Cao J, Li Z. The different mechanisms of peripheral and central TLR4 on chronic postsurgical pain in rats. J Anat 2021; 239:111-124. [PMID: 33730389 PMCID: PMC8197940 DOI: 10.1111/joa.13406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 12/30/2022] Open
Abstract
Chronic postsurgical pain (CPSP) is a common complication after surgery; however, the underlying mechanisms of CPSP are poorly understood. As one of the most important inflammatory pathways, the Toll-like receptor 4/nuclear factor-kappa B (TLR4/NF-κB) signaling pathway plays an important role in chronic pain. However, the precise role of the TLR4/NF-κB signaling pathway in CPSP remains unclear. In the present study, we established a rat model of CPSP induced by skin/muscle incision and retraction (SMIR) and verified the effects and mechanisms of central and peripheral TLR4 and NF-κB on hyperalgesia in SMIR rats. The results showed that TLR4 expression was increased in both the spinal dorsal horn and dorsal root ganglia (DRGs) of SMIR rats. However, the TLR4 expression pattern in the spinal cord was different from that in DRGs. In the spinal cord, TLR4 was expressed in both neurons and microglia, whereas it was expressed in neurons but not in satellite glial cells in DRGs. Further results demonstrate that the central and peripheral TLR4/NF-κB signaling pathway is involved in the SMIR-induced CPSP by different mechanisms. In the peripheral nervous system, we revealed that the TLR4/NF-κB signaling pathway induced upregulation of voltage-gated sodium channel 1.7 (Nav1.7) in DRGs, triggering peripheral hyperalgesia in SMIR-induced CPSP. In the central nervous system, the TLR4/NF-κB signaling pathway participated in SMIR-induced CPSP by activating microglia in the spinal cord. Ultimately, our findings demonstrated that activation of the peripheral and central TLR4/NF-κB signaling pathway involved in the development of SMIR-induced CPSP.
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Affiliation(s)
- Xuemin Han
- The Second Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
- The First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
- Children’s Hospital of Soochow UniversitySoochowChina
| | - Jinping Shao
- Department of Human AnatomySchool of Basic MedicineZhengzhou UniversityZhengzhouChina
- Institute of NeuroscienceZhengzhou UniversityZhengzhouChina
| | - Xiuhua Ren
- Department of Human AnatomySchool of Basic MedicineZhengzhou UniversityZhengzhouChina
- Institute of NeuroscienceZhengzhou UniversityZhengzhouChina
| | - Yaru Li
- The Second Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
- The First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
| | - Wenli Yu
- Department of Human AnatomySchool of Basic MedicineZhengzhou UniversityZhengzhouChina
- Institute of NeuroscienceZhengzhou UniversityZhengzhouChina
| | - Caihong Lin
- Department of Human AnatomySchool of Basic MedicineZhengzhou UniversityZhengzhouChina
- Institute of NeuroscienceZhengzhou UniversityZhengzhouChina
| | - Lei Li
- Department of Human AnatomySchool of Basic MedicineZhengzhou UniversityZhengzhouChina
- Institute of NeuroscienceZhengzhou UniversityZhengzhouChina
| | - Yanyan Sun
- Department of Human AnatomySchool of Basic MedicineZhengzhou UniversityZhengzhouChina
- Institute of NeuroscienceZhengzhou UniversityZhengzhouChina
| | - Bo Xu
- Department of AnesthesiologyGeneral Hospital of Southern Theatre Command of PLAGuangzhouChina
| | - Huan Luo
- Klinik für AugenheilkundeCharité–Universitätsmedizin Berlin, corporate member of Freie Universität BerlinHumboldt‐Universität zu Berlin, and Berlin Institute of HealthGermany
| | - Changlian Zhu
- Center for Brain Repair and RehabilitationInstitute of Neuroscience and PhysiologyGothenburg UniversityGothenburgSweden
| | - Jing Cao
- Department of Human AnatomySchool of Basic MedicineZhengzhou UniversityZhengzhouChina
- Institute of NeuroscienceZhengzhou UniversityZhengzhouChina
| | - Zhisong Li
- The Second Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
- The First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
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12
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Adrar NS, Madani K, Adrar S. Polyphenol-bradykinin interaction: Role in pain sensation. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.100935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Foxo1 selectively regulates static mechanical pain by interacting with Nav1.7. Pain 2021; 162:490-502. [PMID: 32868747 DOI: 10.1097/j.pain.0000000000002055] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 08/14/2020] [Indexed: 02/07/2023]
Abstract
ABSTRACT Mechanical allodynia is a debilitating condition for millions of patients with chronic pain. Mechanical allodynia can manifest in distinct forms, including brush-evoked dynamic and filament-evoked static allodynia. In the nervous system, the forkhead protein Foxo1 plays a critical role in neuronal structures and functions. However, the role of Foxo1 in the somatosensory signal remains unclear. Here, we found that Foxo1 selectively regulated static mechanical pain. Foxo1 knockdown decreased sensitivity to static mechanical stimuli in normal rats and attenuated static mechanical allodynia in rat models for neuropathic, inflammatory, and chemotherapy pain. Conversely, Foxo1 overexpression selectively enhanced sensitivity to static mechanical stimuli and provoked static mechanical allodynia. Furthermore, Foxo1 interacted with voltage-gated sodium Nav1.7 channels and increased the Nav1.7 current density by accelerating activation rather than by changing the expression of Nav1.7 in dorsal root ganglia neurons. In addition, the serum level of Foxo1 was found to be increased in chronic pain patients and to be positively correlated with the severity of chronic pain. Altogether, our findings suggest that serum Foxo1 level could be used as a biological marker for prediction and diagnosis of chronic pain. Moreover, selective blockade of Foxo1/Nav1.7 interaction may offer a new therapeutic approach in patients with mechanical pain.
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Difference of pain vulnerability in adult and juvenile rodents: the role of SIRT1-mediated ClC-3 trafficking in sensory neurons. Pain 2021; 162:1882-1896. [PMID: 33433144 DOI: 10.1097/j.pain.0000000000002176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 12/15/2020] [Indexed: 12/16/2022]
Abstract
ABSTRACT Adults are more likely to suffer from chronic pain than minors, and its underlying mechanism remains unclear. SIRT1 an important age-related protein with function of lifespan extension; whether SIRT1 plays a role in the different pain vulnerability of adult and juvenile remains unclear. Here, we found that the expression level of SIRT1 in dorsal root ganglia (DRG) was related to the pain vulnerability. After nerve injury, the expression of SIRT1 in DRG was decreased in adult rodents whereas increased in juvenile rodents. Differential manipulation of SIRT1 abolished the different pain vulnerability between adult and juvenile rodents. Furthermore, SIRT1 interacted with ClC-3 channel and mediated ClC-3 membrane trafficking and Cl- current in DRG neurons. Differential manipulation of ClC-3 also abolished the difference in pain vulnerability between adult and juvenile rodents. The different anti-inflammatory ability determined the different change trends of SIRT1 and ClC-3 trafficking contributed to the different pain vulnerability in adult and juvenile rodents. In addition, the serum SIRT1 level was negatively correlated with the pain score in patients with chronic pain. These findings revealed the mechanism of the difference in pain vulnerability between adult and juvenile rodents and provided evidence for age-specific treatment of chronic pain.
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Xu J, Wu S, Wang J, Wang J, Yan Y, Zhu M, Zhang D, Jiang C, Liu T. Oxidative stress induced by NOX2 contributes to neuropathic pain via plasma membrane translocation of PKCε in rat dorsal root ganglion neurons. J Neuroinflammation 2021; 18:106. [PMID: 33952299 PMCID: PMC8101139 DOI: 10.1186/s12974-021-02155-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 04/21/2021] [Indexed: 11/10/2022] Open
Abstract
Background Nicotinamide adenine dinucleotide phosphate oxidase 2 (NOX2)-induced oxidative stress, including the production of reactive oxygen species (ROS) and hydrogen peroxide, plays a pivotal role in neuropathic pain. Although the activation and plasma membrane translocation of protein kinase C (PKC) isoforms in dorsal root ganglion (DRG) neurons have been implicated in multiple pain models, the interactions between NOX2-induced oxidative stress and PKC remain unknown. Methods A spared nerve injury (SNI) model was established in adult male rats. Pharmacologic intervention and AAV-shRNA were applied locally to DRGs. Pain behavior was evaluated by Von Frey tests. Western blotting and immunohistochemistry were performed to examine the underlying mechanisms. The excitability of DRG neurons was recorded by whole-cell patch clamping. Results SNI induced persistent NOX2 upregulation in DRGs for up to 2 weeks and increased the excitability of DRG neurons, and these effects were suppressed by local application of gp91-tat (a NOX2-blocking peptide) or NOX2-shRNA to DRGs. Of note, the SNI-induced upregulated expression of PKCε but not PKC was decreased by gp91-tat in DRGs. Mechanical allodynia and DRG excitability were increased by ψεRACK (a PKCε activator) and reduced by εV1-2 (a PKCε-specific inhibitor). Importantly, εV1-2 failed to inhibit SNI-induced NOX2 upregulation. Moreover, the SNI-induced increase in PKCε protein expression in both the plasma membrane and cytosol in DRGs was attenuated by gp91-tat pretreatment, and the enhanced translocation of PKCε was recapitulated by H2O2 administration. SNI-induced upregulation of PKCε was blunted by phenyl-N-tert-butylnitrone (PBN, an ROS scavenger) and the hydrogen peroxide catalyst catalase. Furthermore, εV1-2 attenuated the mechanical allodynia induced by H2O2 Conclusions NOX2-induced oxidative stress promotes the sensitization of DRGs and persistent pain by increasing the plasma membrane translocation of PKCε. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-021-02155-6.
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Affiliation(s)
- Jing Xu
- Center for Experimental Medicine, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Shinan Wu
- Department of Pediatrics, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Junfei Wang
- Department of Pediatrics, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Jianmei Wang
- Department of Pediatrics, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Yi Yan
- Department of Pain Medicine, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Mengye Zhu
- Department of Pain Medicine, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Daying Zhang
- Department of Pain Medicine, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Changyu Jiang
- Jisheng Han Academician Workstation for Pain Medicine, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, 518052, Guangdong, China
| | - Tao Liu
- Center for Experimental Medicine, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China. .,Department of Pediatrics, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China. .,Jisheng Han Academician Workstation for Pain Medicine, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, 518052, Guangdong, China.
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16
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Xie MX, Cao XY, Zeng WA, Lai RC, Guo L, Wang JC, Xiao YB, Zhang X, Chen D, Liu XG, Zhang XL. ATF4 selectively regulates heat nociception and contributes to kinesin-mediated TRPM3 trafficking. Nat Commun 2021; 12:1401. [PMID: 33658516 PMCID: PMC7930092 DOI: 10.1038/s41467-021-21731-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 02/09/2021] [Indexed: 12/30/2022] Open
Abstract
Effective treatments for patients suffering from heat hypersensitivity are lacking, mostly due to our limited understanding of the pathogenic mechanisms underlying this disorder. In the nervous system, activating transcription factor 4 (ATF4) is involved in the regulation of synaptic plasticity and memory formation. Here, we show that ATF4 plays an important role in heat nociception. Indeed, loss of ATF4 in mouse dorsal root ganglion (DRG) neurons selectively impairs heat sensitivity. Mechanistically, we show that ATF4 interacts with transient receptor potential cation channel subfamily M member-3 (TRPM3) and mediates the membrane trafficking of TRPM3 in DRG neurons in response to heat. Loss of ATF4 also significantly decreases the current and KIF17-mediated trafficking of TRPM3, suggesting that the KIF17/ATF4/TRPM3 complex is required for the neuronal response to heat stimuli. Our findings unveil the non-transcriptional role of ATF4 in the response to heat stimuli in DRG neurons.
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Affiliation(s)
- Man-Xiu Xie
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, 651 Dongfeng East Road, Guangzhou, China
| | - Xian-Ying Cao
- College of Food Science and Technology, Hainan University, 58 Renmin Avenue, Haikou, China
- State Key Laboratory of Marine Resources Utilization of South China Sea, 58 Renmin Avenue, Haikou, China
| | - Wei-An Zeng
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, 651 Dongfeng East Road, Guangzhou, China
| | - Ren-Chun Lai
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, 651 Dongfeng East Road, Guangzhou, China
| | - Lan Guo
- College of Food Science and Technology, Hainan University, 58 Renmin Avenue, Haikou, China
| | - Jun-Chao Wang
- Department of Anesthesiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, 651 Dongfeng East Road, Guangzhou, China
| | - Yi-Bin Xiao
- Pain Research Center and Department of Physiology, Zhongshan School of Medicine of Sun Yat-sen University, 74 Zhongshan Road 2, Guangzhou, China
| | - Xi Zhang
- Pain Research Center and Department of Physiology, Zhongshan School of Medicine of Sun Yat-sen University, 74 Zhongshan Road 2, Guangzhou, China
| | - Di Chen
- College of Food Science and Technology, Hainan University, 58 Renmin Avenue, Haikou, China
| | - Xian-Guo Liu
- Pain Research Center and Department of Physiology, Zhongshan School of Medicine of Sun Yat-sen University, 74 Zhongshan Road 2, Guangzhou, China.
| | - Xiao-Long Zhang
- Medical Research Center of Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Rd. 2, Guangzhou, China.
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17
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Berke IM, Jain E, Yavuz B, McGrath T, Chen L, Silva MJ, Mbalaviele G, Guilak F, Kaplan DL, Setton LA. NF-κB-mediated effects on behavior and cartilage pathology in a non-invasive loading model of post-traumatic osteoarthritis. Osteoarthritis Cartilage 2021; 29:248-256. [PMID: 33246158 PMCID: PMC8023431 DOI: 10.1016/j.joca.2020.10.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 09/25/2020] [Accepted: 10/13/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE This study aimed to examine the temporal activation of NF-κB and its relationship to the development of pain-related sensitivity and behavioral changes in a non-invasive murine knee loading model of PTOA. METHOD Following knee injury NF-κB activity was assessed longitudinally via in vivo imaging in FVB. Cg-Tg (HIV-EGFP,luc)8Tsb/J mice. Measures of pain-related sensitivity and behavior were also assessed longitudinally for 16 weeks. Additionally, we antagonized NF-κB signaling via intra-articular delivery of an IκB kinase two antagonist to understand how local NF-κB inhibition might alter disease progression. RESULTS Following joint injury NF-κB signaling within the knee joint was transiently increased and peaked on day 3 with an estimated 1.35 p/s/cm2/sr (95% CI 0.913.1.792 p/s/cm2/sr) fold increase in signaling when compared to control joints. Furthermore, injury resulted in the long-term development of hindpaw allodynia. Hyperalgesia withdrawal thresholds were reduced at injured knee joints, with the largest reduction occurring 2 days following injury (estimate of between group difference 129.1 g with 95% CI 60.9,197.4 g), static weight bearing on injured limbs was also reduced. Local delivery of an NF-κB inhibitor following joint injury reduced chondrocyte death and influenced the development of pain-related sensitivity but did not reduce long-term cartilage degeneration. CONCLUSION These findings underscore the development of behavioral changes in this non-invasive loading model of PTOA and their relationships to NF-κB activation and pathology. They also highlight the potential chondroprotective effects of NF-κB inhibition shortly following joint injury despite limitations in preventing the long-term development of joint degeneration in this model of PTOA.
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Affiliation(s)
- I M Berke
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - E Jain
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - B Yavuz
- Department of Biomedical Engineering, Tufts University School of Engineering, Medford, MA, 02155, USA
| | - T McGrath
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - L Chen
- Division of Biostatistics, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - M J Silva
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA; Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA; Musculoskeletal Research Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - G Mbalaviele
- Division of Bone and Mineral Diseases, Washington University School of Medicine, St. Louis, MO 63110, USA; Musculoskeletal Research Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - F Guilak
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA; Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA; Musculoskeletal Research Center, Washington University School of Medicine, St. Louis, MO, 63110, USA; Shriners Hospitals for Children - St. Louis, St. Louis, MO, 63110, USA
| | - D L Kaplan
- Department of Biomedical Engineering, Tufts University School of Engineering, Medford, MA, 02155, USA
| | - L A Setton
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA; Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA; Musculoskeletal Research Center, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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18
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Vincent K, Dona CPG, Albert TJ, Dahia CL. Age-related molecular changes in the lumbar dorsal root ganglia of mice: Signs of sensitization, and inflammatory response. JOR Spine 2020; 3:e1124. [PMID: 33392459 PMCID: PMC7770202 DOI: 10.1002/jsp2.1124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/18/2020] [Accepted: 08/23/2020] [Indexed: 11/06/2022] Open
Abstract
Aging is a major risk factor for numerous painful, inflammatory, and degenerative diseases including disc degeneration. A better understanding of how the somatosensory nervous system adapts to the changing physiology of the aging body will be of great significance for our expanding aging population. Previously, we reported that chronological aging of mouse lumbar discs is pathological and associated with behavioral changes related to pain. It is established that with age and degeneration the lumbar discs become inflammatory and innervated. Here we analyze the aging lumbar dorsal root ganglia (DRGs) and spinal cord dorsal horn (SCDH) in mice between 3 and 24 months of age for age-related somatosensory adaptations. We observe that as mice age there are signs of peripheral sensitization, and response to inflammation at the molecular and cellular level in the DRGs. From 12 months onwards the mRNA expression of vasodilator and neurotransmitter, Calca (CGRP); stress (and survival) marker, Atf3; and neurotrophic factor, Bdnf, increases linearly with age in the DRGs. Further, while the mRNA expression of neuropeptide, Tac1, precursor of Substance P, did not change at the transcriptional level, TAC1 protein expression increased in 24-month-old DRGs. Additionally, elevated expression of NFκB subunits, Nfkb1 and Rela, but not inflammatory mediators, Tnf, Il6, Il1b, or Cox2, in the DRGs suggest peripheral nerves are responding to inflammation, but do not increase the expression of inflammatory mediators at the transcriptional level. These results identify a progressive, age-related shift in the molecular profile of the mouse somatosensory nervous system and implicates nociceptive sensitization and inflammatory response.
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Affiliation(s)
- Kathleen Vincent
- Orthopedic Soft Tissue Research ProgramHospital for Special SurgeryNew YorkNew YorkUSA
- Department of Cell and Developmental Biology, Weill Cornell MedicineGraduate School of Medical ScienceNew YorkNew YorkUSA
| | - Chethana Prabodhanie Gallage Dona
- Orthopedic Soft Tissue Research ProgramHospital for Special SurgeryNew YorkNew YorkUSA
- Department of MedicineWeill Cornell Medical CollegeNew YorkNew YorkUSA
| | - Todd J Albert
- Department of MedicineWeill Cornell Medical CollegeNew YorkNew YorkUSA
- Orthopaedic SurgeryHospital for Special SurgeryNew YorkNew YorkUSA
| | - Chitra Lekha Dahia
- Orthopedic Soft Tissue Research ProgramHospital for Special SurgeryNew YorkNew YorkUSA
- Department of Cell and Developmental Biology, Weill Cornell MedicineGraduate School of Medical ScienceNew YorkNew YorkUSA
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19
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Mini-review - Sodium channels and beyond in peripheral nerve disease: Modulation by cytokines and their effector protein kinases. Neurosci Lett 2020; 741:135446. [PMID: 33166641 DOI: 10.1016/j.neulet.2020.135446] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 10/01/2020] [Accepted: 10/03/2020] [Indexed: 12/18/2022]
Abstract
Peripheral neuropathy is associated with enhanced activity of primary afferents which is often manifested as pain. Voltage-gated sodium channels (VGSCs) are critical for the initiation and propagation of action potentials and are thus essential for the transmission of the noxious stimuli from the periphery. Human peripheral sensory neurons express multiple VGSCs, including Nav1.7, Nav1.8, and Nav1.9 that are almost exclusively expressed in the peripheral nervous system. Distinct biophysical properties of Nav1.7, Nav1.8, and Nav1.9 underlie their differential contributions to finely tuned neuronal firing of nociceptors, and mutations in these channels have been associated with several inherited human pain disorders. Functional characterization of these mutations has provided additional insights into the role of these channels in electrogenesis in nociceptive neurons and pain sensation. Peripheral tissue damage activates an inflammatory response and triggers generation and release of inflammatory mediators, which can act through diverse signaling cascades to modulate expression and activity of ion channels including VGSCs, contributing to the development and maintenance of pathological pain conditions. In this review, we discuss signaling pathways that are activated by pro-nociceptive inflammatory mediators that regulate peripheral sodium channels, with a specific focus on direct phosphorylation of these channels by multiple protein kinases.
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20
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Mai JZ, Liu C, Huang Z, Mai CL, Zhou X, Zhang J, Liu XG. Oral application of bulleyaconitine A attenuates morphine tolerance in neuropathic rats by inhibiting long-term potentiation at C-fiber synapses and protein kinase C gamma in spinal dorsal horn. Mol Pain 2020; 16:1744806920917242. [PMID: 32290780 PMCID: PMC7160774 DOI: 10.1177/1744806920917242] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Morphine is frequently used for the treatment of chronic pain, while long-term
use of the drug leads to analgesic tolerance. At present, the prevention of the
side effect remains a big challenge. Bulleyaconitine A, a diterpenoid alkaloid
from Aconitum bulleyanum plants, has been used to treat chronic
pain in China for more than 30 years. In the present study, we tested the effect
of bulleyaconitine A on analgesic tolerance induced by morphine injections
(10 mg/kg s.c., b.i.d.) in the lumbar 5 spinal nerve ligation model of
neuropathic pain. We found that intragastrical application of bulleyaconitine A
(0.4 mg/kg) 30 min before each morphine injection substantially inhibited the
decrease in morphine’s inhibitory effect on mechanical allodynia and thermal
hyperalgesia. Mechanistically, morphine injections further potentiated the
lumbar 5 spinal nerve ligation induced long-term potentiation at C-fiber
synapses in the spinal dorsal horn, a synaptic model of chronic pain. This
effect was completely blocked by intragastrical bulleyaconitine A. It has been
well established that activation of protein kinase C gamma and of glial cells in
the spinal dorsal horn are critical for the development of opioid tolerance and
neuropathic pain. We found that morphine injections exacerbated the upregulation
of phospho-protein kinase C gamma (an active form of protein kinase C gamma),
and the activation of microglia and astrocytes in the spinal dorsal horn induced
by lumbar 5 spinal nerve ligation, and the effects were considerably prohibited
by intragastrical bulleyaconitine A. Thus, spinal long-term potentiation at
C-fiber synapses may underlie morphine tolerance. Oral administration of
bulleyaconitine A may be a novel and simple approach for treating of opioid
tolerance.
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Affiliation(s)
- Jie-Zhen Mai
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Chong Liu
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Zhuo Huang
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Chun-Lin Mai
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xin Zhou
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Jun Zhang
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xian-Guo Liu
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Guangdong Province Key Laboratory of Brain Function and Disease, Guangzhou, China
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