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Zhang Y, Wang B, Feng X, Wang H, Gao J, Li X, Huo X, Yasin B, Bekker A, Hu H, Tao YX. RNA-binding protein SYNCRIP contributes to neuropathic pain through stabilising CCR2 expression in primary sensory neurones. Br J Anaesth 2024:S0007-0912(24)00466-5. [PMID: 39244479 DOI: 10.1016/j.bja.2024.07.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 07/23/2024] [Accepted: 07/31/2024] [Indexed: 09/09/2024] Open
Abstract
BACKGROUND Nerve injury-induced changes in gene expression in the dorsal root ganglion (DRG) contribute to the genesis of neuropathic pain. SYNCRIP, an RNA-binding protein, is critical for the stabilisation of gene expression. Whether SYNCRIP participates in nerve injury-induced alterations in DRG gene expression and nociceptive hypersensitivity is unknown. METHODS The expression and distribution of SYNCRIP in mouse DRG after chronic constriction injury (CCI) of the unilateral sciatic nerve were assessed. Effect of microinjection of Syncrip small interfering RNA into the ipsilateral L3 and L4 DRGs on the CCI-induced upregulation of chemokine (C-C motif) receptor 2 (CCR2) and nociceptive hypersensitivity were examined. Additionally, effects of microinjection of adeno-associated virus 5 expressing full length Syncrip mRNA (AAV5-Syncrip) on basal DRG CCR2 expression and nociceptive thresholds were observed. RESULTS SYNCRIP is expressed predominantly in DRG neurones, where it co-exists with CCR2. Levels of Syncrip mRNA and SYNCRIP protein in injured DRG increased time-dependently on days 3-14 after CCI. Blocking this increase through microinjection of Syncrip small interfering RNA into injured DRG attenuated CCI-induced upregulation of DRG CCR2 and development and maintenance of nociceptive hypersensitivities. Mimicking this increase through DRG microinjection of AAV5-Syncrip elevated CCR2 expression in microinjected DRGs, enhanced the responses to mechanical, heat, and cold stimuli, and induced ongoing pain in naive mice. Mechanistically, SYNCRIP bound to 3-UTR of Ccr2 mRNA and stabilised its expression in DRG neurones. CONCLUSIONS SYNCRIP contributes to the induction and maintenance of neuropathic pain likely through stabilising expression of CCR2 in injured DRG. SYNCRIP may be a potential target for treating this disorder.
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Affiliation(s)
- Yang Zhang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Bing Wang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Xiaozhou Feng
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Huixing Wang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Ju Gao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Xu Li
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Xiaodong Huo
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Bushra Yasin
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Alex Bekker
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Huijuan Hu
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA; Department of Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA; Department of Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA; Department of Cell Biology & Molecular Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA.
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Xu L, Zheng S, Chen L, Yang L, Zhang S, Liu B, Shen K, Feng Q, Zhou Q, Yao M. N4-acetylcytidine acetylation of neurexin 2 in the spinal dorsal horn regulates hypersensitivity in a rat model of cancer-induced bone pain. MOLECULAR THERAPY. NUCLEIC ACIDS 2024; 35:102200. [PMID: 38831898 PMCID: PMC11145350 DOI: 10.1016/j.omtn.2024.102200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 04/21/2024] [Indexed: 06/05/2024]
Abstract
Cancer-induced bone pain (CIBP) significantly impacts the quality of life and survival of patients with advanced cancer. Despite the established role of neurexins in synaptic structure and function, their involvement in sensory processing during injury has not been extensively studied. In this study using a rat model of CIBP, we observed increased neurexin 2 expression in spinal cord neurons. Knockdown of neurexin 2 in the spinal cord reversed CIBP-related behaviors, sensitization of spinal c-Fos neurons, and pain-related negative emotional behaviors. Additionally, increased acetylation of neurexin 2 mRNA was identified in the spinal dorsal horn of CIBP rats. Decreasing the expression of N-acetyltransferase 10 (NAT10) reduced neurexin 2 mRNA acetylation and neurexin 2 expression. In PC12 cells, we confirmed that neurexin 2 mRNA acetylation enhanced its stability, and neurexin 2 expression was regulated by NAT10. Finally, we discovered that the NAT10/ac4C-neurexin 2 axis modulated neuronal synaptogenesis. This study demonstrated that the NAT10/ac4C-mediated posttranscriptional modulation of neurexin 2 expression led to the remodeling of spinal synapses and the development of conscious hypersensitivity in CIBP rats. Therefore, targeting the epigenetic modification of neurexin 2 mRNA ac4C may offer a new therapeutic approach for the treatment of nociceptive hypersensitivity in CIBP.
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Affiliation(s)
- Longsheng Xu
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Shang Zheng
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Liping Chen
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Lei Yang
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Shuyao Zhang
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Beibei Liu
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Kangli Shen
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Qinli Feng
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Qinghe Zhou
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Ming Yao
- Department of Anesthesia and Pain Medicine, Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
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3
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Huang L, Sharma D, Feng X, Pan Z, Wu S, Munoz D, Bekker A, Hu H, Tao YX. RALY participates in nerve trauma-induced nociceptive hypersensitivity through triggering Eif4g2 gene expression in primary sensory neurons. Br J Pharmacol 2024; 181:735-751. [PMID: 37782223 PMCID: PMC10873045 DOI: 10.1111/bph.16259] [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: 04/04/2023] [Revised: 08/29/2023] [Accepted: 09/13/2023] [Indexed: 10/03/2023] Open
Abstract
BACKGROUND AND PURPOSE Peripheral nerve trauma-induced dysregulation of pain-associated genes in the primary sensory neurons of dorsal root ganglion (DRG) contributes to neuropathic pain genesis. RNA-binding proteins participate in gene transcription. We hypothesized that RALY, an RNA-binding protein, participated in nerve trauma-induced dysregulation of DRG pain-associated genes and nociceptive hypersensitivity. METHODS AND RESULTS Immunohistochemistry staining showed that RALY was expressed exclusively in the nuclei of DRG neurons. Peripheral nerve trauma caused by chronic constriction injury (CCI) of unilateral sciatic nerve produced time-dependent increases in the levels of Raly mRNA and RALY protein in injured DRG. Blocking this increase through DRG microinjection of adeno-associated virus 5 (AAV5)-expressing Raly shRNA reduced the CCI-induced elevation in the amount of eukaryotic initiation factor 4 gamma 2 (Eif4g2) mRNA and Eif4g2 protein in injured DRG and mitigated the development and maintenance of CCI-induced nociceptive hypersensitivity, without altering basal (acute) response to noxious stimuli and locomotor activity. Mimicking DRG increased RALY through DRG microinjection of AAV5 expressing Raly mRNA up-regulated the expression of Eif4g2 mRNA and Eif4g2 protein in the DRG and led to hypersensitive responses to noxious stimuli in the absence of nerve trauma. Mechanistically, CCI promoted the binding of RALY to the promoter of Eif4g2 gene and triggered its transcriptional activity. CONCLUSION AND IMPLICATIONS Our findings indicate that RALY participates in nerve trauma-induced nociceptive hypersensitivity likely through transcriptionally triggering Eif4g2 expression in the DRG. RALY may be a potential target in neuropathic pain management.
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Affiliation(s)
- Lina Huang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Dilip Sharma
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Xiaozhou Feng
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Zhiqiang Pan
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Shaogen Wu
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Daisy Munoz
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Alex Bekker
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Huijuan Hu
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
- Department of Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ07103, USA
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
- Department of Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ07103, USA
- Department of Cell Biology & Molecular Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ07103, USA
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4
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Liang Y, Sharma D, Wang B, Wang H, Feng X, Ma R, Berkman T, Char S, Bekker A, Tao YX. Transcription factor EBF1 mitigates neuropathic pain by rescuing Kv1.2 expression in primary sensory neurons. Transl Res 2024; 263:15-27. [PMID: 37607607 PMCID: PMC10840933 DOI: 10.1016/j.trsl.2023.08.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/31/2023] [Accepted: 08/15/2023] [Indexed: 08/24/2023]
Abstract
Nerve injury-induced alternations of gene expression in primary sensory neurons of the dorsal root ganglion (DRG) are molecular basis of neuropathic pain genesis. Transcription factors regulate gene expression. In this study, we examined whether early B cell factor 1 (EBF1), a transcription factor, in the DRG, participated in neuropathic pain caused by chronic constriction injury (CCI) of the sciatic nerve. EBF1 was distributed exclusively in the neuronal nucleus and coexpressed with cytoplasmic/membrane Kv1.2 in individual DRG neurons. The expression of Ebf1 mRNA and protein was time-dependently downregulated in the ipsilateral lumbar (L) 3/4 DRGs after unilateral CCI. Rescuing this downregulation through microinjection of the adeno-associated virus 5 expressing full-length Ebf1 mRNA into the ipsilateral L3/4 DRGs reversed the CCI-induced decrease of DRG Kv1.2 expression and alleviated the development and maintenance of mechanical, heat and cold hypersensitivities. Conversely, mimicking the downregulation of DRG EBF1 through microinjection of AAV5-expressing Ebf1 shRNA into unilateral L3/4 DRGs produced a reduction of Kv1.2 expression in the ipsilateral L3/4 DRGs, spontaneous pain, and the enhanced responses to mechanical, heat and cold stimuli in naive mice. Mechanistically, EBF1 not only bound to the Kcna2 gene (encoding Kv1.2) promoter but also directly activated its activity. CCI decreased the EBF1 binding to the Kcna2 promoter in the ipsilateral L3/4 DRGs. Our findings suggest that DRG EBF1 downregulation contributes to neuropathic pain likely by losing its binding to Kcna2 promoter and subsequently silencing Kv1.2 expression in primary sensory neurons. Exogenous EBF1 administration may mitigate neuropathic pain by rescuing DRG Kv1.2 expression.
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Affiliation(s)
- Yingping Liang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey
| | - Dilip Sharma
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey
| | - Bing Wang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey
| | - Huixing Wang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey
| | - Xiaozhou Feng
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey
| | - Ruining Ma
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey
| | - Tolga Berkman
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey
| | - Steven Char
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey
| | - Alex Bekker
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey; Department of Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey; Departments of Cell Biology & Molecular Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey.
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5
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Centeno MV, Alam MS, Haldar K, Apkarian AV. Long-range action of an HDAC inhibitor treats chronic pain in a spared nerve injury rat model. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.13.571583. [PMID: 38168166 PMCID: PMC10760082 DOI: 10.1101/2023.12.13.571583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Histone deacetylase inhibitors (HDACi) that modulate epigenetic regulation and are approved for treating rare cancers have, in disease models, also been shown to mitigate neurological conditions, including chronic pain. They are of interest as non-opioid treatments, but achieving long-term efficacy with limited dosing has remained elusive. Here we utilize a triple combination formulation (TCF) comprised of a pan-HDACi vorinostat (Vo at its FDA-approved daily dose of 50mg/Kg), the caging agent 2-hydroxypropyl-β-cyclodextrin (HPBCD) and polyethylene glycol (PEG) known to boost plasma and brain exposure and efficacy of Vo in mice and rats, of various ages, spared nerve injury (SNI) model of chronic neuropathic pain. Administration of the TCF (but not HPBCD and PEG) decreased mechanical allodynia for 4 weeks without antagonizing weight, anxiety, or mobility. This was achieved at less than 1% of the total dose of Vo approved for 4 weeks of tumor treatment and associated with decreased levels of major inflammatory markers and microglia in ipsilateral (but not contralateral) spinal cord regions. A single TCF injection was sufficient for 3-4 weeks of efficacy: this was mirrored in repeat injections, specific for the injured paw and not seen on sham treatment. Pharmacodynamics in an SNI mouse model suggested pain relief was sustained for days to weeks after Vo elimination. Doubling Vo in a single TCF injection proved effectiveness was limited to male rats, where the response amplitude tripled and remained effective for > 2 months, an efficacy that outperforms all currently available chronic pain pharmacotherapies. Together, these data suggest that through pharmacological modulation of Vo, the TCF enables single-dose effectiveness with extended action, reduces long-term HDACi dosage, and presents excellent potential to develop as a non-opioid treatment option for chronic pain.
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Affiliation(s)
- Maria Virginia Centeno
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611
- Department of Neuroscience, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611
| | - Md Suhail Alam
- Department of Biological Sciences, Boler-Parseghian Center for Rare and Neglected Diseases, University of Notre Dame, Notre Dame, Indiana 46556
| | - Kasturi Haldar
- Department of Biological Sciences, Boler-Parseghian Center for Rare and Neglected Diseases, University of Notre Dame, Notre Dame, Indiana 46556
| | - Apkar Vania Apkarian
- Center for Translational Pain Research, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611
- Department of Neuroscience, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611
- Department of Anesthesia, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611
- Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611
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6
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Gu YH, Wang J, Lu WC, Cheng Y, Tao R, Zhang SJ, Xu T, Zhai KW, Luo SX, Xin WJ. POU2F1/DNMT3a Pathway Participates in Neuropathic Pain by Hypermethylation-Mediated LRFN4 Downregulation Following Oxaliplatin Treatment. Neurochem Res 2023; 48:3652-3664. [PMID: 37592110 DOI: 10.1007/s11064-023-04011-w] [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: 06/07/2023] [Revised: 08/02/2023] [Accepted: 08/04/2023] [Indexed: 08/19/2023]
Abstract
Evidence demonstrates that DNA methylation is associated with the occurrence and development of various neurological diseases. However, the potential target genes undergoing DNA methylation, as well as their involvement in the chemotherapy drug oxaliplatin-induced neuropathic pain, are still unclear. Here, Lrfn4, which showed hypermethylation in the promoter regions, was screened from the SRA methylation database (PRJNA587622) following oxaliplatin treatment. MeDIP and qPCR assays identified that oxaliplatin treatment increased the methylation in Lrfn4 promoter region and decreased the expression of LRFN4 in the spinal dorsal horn. The assays with gain and loss of LRFN4 function demonstrated that LRFN4 downregulation in spinal dorsal horn contributed to the oxaliplatin-induced mechanical allodynia and cold hyperalgesia. Moreover, oxaliplatin treatment increased the DNA methyltransferases DNMT3a expression and the interaction between DNMT3a and Lrfn4 promoter, while inhibition of DNMT3a prevented the downregulation of LRFN4a induced by oxaliplatin. We also observed that the transcriptional factor POU2F1 can bind to the predicted sites in DNMT3a promoter region, oxaliplatin treatment upregulated the expression of transcriptional factor POU2F1 in dorsal horn neurons. Intrathecal injection of POU2F1 siRNA prevented the DNMT3a upregulation and the LRFN4 downregulation induced by oxaliplatin. Additionally, intrathecal injection of DNMT3a siRNA or POU2F1 siRNA alleviated the mechanical allodynia induced by oxaliplatin. These findings suggested that transcription factor POU2F1 upregulated the expression of DNMT3a, which subsequently decreased LRFN4 expression through hypermethylation modification in spinal dorsal horn, thereby mediating neuropathic pain following oxaliplatin treatment.
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Affiliation(s)
- Yan-Hui Gu
- Department of General Surgery, Cancer Hospital of Zhengzhou University, 127 Dongming Rd, Zhengzhou, China
- Guangdong Province Key Laboratory of Brain Function and Disease and Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510120, China
| | - Jing Wang
- Guangdong Province Key Laboratory of Brain Function and Disease and Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510120, China
- Department of Pain Management, Henan Provincial People's Hospital, Zhengzhou University, Zhengzhou, China
| | - Wei-Cheng Lu
- State Key Laboratory of Oncology in Southern China, Department of Anesthesiology, Collaborative Innovation for Cancer Medicine, Sun Yat- sen University Cancer Center, Guangzhou, China
| | - Yong Cheng
- Department of General Surgery, Cancer Hospital of Zhengzhou University, 127 Dongming Rd, Zhengzhou, China
| | - Rong Tao
- Department of Pain Management, Henan Provincial People's Hospital, Zhengzhou University, Zhengzhou, China
| | - Shi-Jia Zhang
- Department of General Surgery, Cancer Hospital of Zhengzhou University, 127 Dongming Rd, Zhengzhou, China
| | - Ting Xu
- Guangdong Province Key Laboratory of Brain Function and Disease and Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510120, China
| | - Ke-Wei Zhai
- Department of General Surgery, Cancer Hospital of Zhengzhou University, 127 Dongming Rd, Zhengzhou, China
| | - Su-Xia Luo
- Department of General Surgery, Cancer Hospital of Zhengzhou University, 127 Dongming Rd, Zhengzhou, China.
| | - Wen-Jun Xin
- Guangdong Province Key Laboratory of Brain Function and Disease and Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510120, China.
- Zhongshan Medical School, Sun Yat-sen University, Zhongshan Rd. 2, Guangzhou, China.
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7
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Keller DA, Bassan A, Amberg A, Burns Naas LA, Chambers J, Cross K, Hall F, Jahnke GD, Luniwal A, Manganelli S, Mestres J, Mihalchik-Burhans AL, Woolley D, Tice RR. In silico approaches in carcinogenicity hazard assessment: case study of pregabalin, a nongenotoxic mouse carcinogen. FRONTIERS IN TOXICOLOGY 2023; 5:1234498. [PMID: 38026843 PMCID: PMC10679394 DOI: 10.3389/ftox.2023.1234498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 10/30/2023] [Indexed: 12/01/2023] Open
Abstract
In silico toxicology protocols are meant to support computationally-based assessments using principles that ensure that results can be generated, recorded, communicated, archived, and then evaluated in a uniform, consistent, and reproducible manner. We investigated the availability of in silico models to predict the carcinogenic potential of pregabalin using the ten key characteristics of carcinogens as a framework for organizing mechanistic studies. Pregabalin is a single-species carcinogen producing only one type of tumor, hemangiosarcomas in mice via a nongenotoxic mechanism. The overall goal of this exercise is to test the ability of in silico models to predict nongenotoxic carcinogenicity with pregabalin as a case study. The established mode of action (MOA) of pregabalin is triggered by tissue hypoxia, leading to oxidative stress (KC5), chronic inflammation (KC6), and increased cell proliferation (KC10) of endothelial cells. Of these KCs, in silico models are available only for selected endpoints in KC5, limiting the usefulness of computational tools in prediction of pregabalin carcinogenicity. KC1 (electrophilicity), KC2 (genotoxicity), and KC8 (receptor-mediated effects), for which predictive in silico models exist, do not play a role in this mode of action. Confidence in the overall assessments is considered to be medium to high for KCs 1, 2, 5, 6, 7 (immune system effects), 8, and 10 (cell proliferation), largely due to the high-quality experimental data. In order to move away from dependence on animal data, development of reliable in silico models for prediction of oxidative stress, chronic inflammation, immunosuppression, and cell proliferation will be critical for the ability to predict nongenotoxic compound carcinogenicity.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Jordi Mestres
- Chemotargets SL, Parc Científic de Barcelona, Barcelona, Spain
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8
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Zhou X, Wei J, Cheng H, Tian L, Zhu X, Zhang Y, Xu L, Wei G, Huo FQ, Liang L. CoREST1 in primary sensory neurons regulates neuropathic pain in male mice. Life Sci 2023; 332:122088. [PMID: 37730112 DOI: 10.1016/j.lfs.2023.122088] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 09/11/2023] [Accepted: 09/12/2023] [Indexed: 09/22/2023]
Abstract
AIMS Epigenetic regulation is implicated in the neurogenesis of neuropathic pain. The repressor element 1 (RE1) silencing transcription factor (REST) corepressor (CoREST) proteins function as corepressors in the REST complex and/or LSD1 epigenetic complex. In the current study, we aimed to find the expression profile of CoREST1 in the dorsal root ganglion (DRG) and investigate whether it plays a role in neuropathic pain. MAIN METHODS The evoked pain behaviors in mice were examined by the von Frey test and thermal test in a spinal nerve ligation (SNL)-induced neuropathic pain mice model. CoREST1 siRNA or virus was administered by DRG microinjection or intrathecal injection. The CoREST1 expression in DRGs was examined by immunofluorescence, quantitative PCR, Western blotting, and co-immunoprecipitation. KEY FINDINGS CoREST1 was non-selectively expressed in large, medium, and small DRG neurons, and it exclusively colocalized with LSD1. In neuropathic pain models, peripheral nerve injury induced the upregulation of CoREST1 and increased binding of CoREST1 with LSD1 in injured DRGs in male mice. Furthermore, CoREST1 siRNA prevented the development of SNL-induced pain hypersensitivity as well as led to the reduction of established pain hypersensitivity during the maintenance period in SNL mice. Conversely, the overexpression of CoREST1 in DRGs by in vivo transfection of virus-induced pain hypersensitivity in naive mice. SIGNIFICANCE Our study demonstrated that CoREST1, along with LSD1, was expressed in primary sensory neurons specifically in response to nerve injury, and promoted nociceptive pain hypersensitivity in mice. Thus, CoREST1 might serve as a potential target for treating neuropathic pain.
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Affiliation(s)
- Xiaoqiong Zhou
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China
| | - Jianxiong Wei
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China
| | - Hong Cheng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China
| | - Lixia Tian
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China
| | - Xuan Zhu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, PR China
| | - Yidan Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China
| | - Linping Xu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Beijing, PR China
| | - Guihua Wei
- Institute of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, PR China
| | - Fu-Quan Huo
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Beijing, PR China
| | - Lingli Liang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Beijing, PR China.
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9
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Wang B, Liang Y, Bekker A, Hu H, Tao YX. Sensory neuron-specific long noncoding RNA in small non-peptidergic dorsal root ganglion neurons selectively impairs nerve injury-induced mechanical hypersensitivity. Life Sci 2023; 332:122120. [PMID: 37741322 PMCID: PMC10591916 DOI: 10.1016/j.lfs.2023.122120] [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: 08/05/2023] [Revised: 09/16/2023] [Accepted: 09/20/2023] [Indexed: 09/25/2023]
Abstract
AIMS Nerve injury-induced mechanical hypersensitivity is one of major clinical symptoms in neuropathic pain patients. Understanding molecular mechanisms underlying this symptom is crucial for developing effective therapies. The present study was to investigate whether sensory neuron-specific long noncoding RNA (SS-lncRNA) predominantly expressed in small non-peptidergic dorsal root ganglion (DRG) neurons repaired nerve injury-induced mechanical hypersensitivity. MATERIALS AND METHODS SS-lncRNA downregulation in the mas-related G protein-coupled receptor member D (Mrgprd)-expressed DRG neurons was rescued and mimicked by crossbreeding MrgprdCreERT2/+ lines with Rosa26SS-lncRNA knock-in mice and SS-lncRNAfl/fl mice, respectively, followed by tamoxifen injection. KEY FINDINGS Rescuing SS-lncRNA downregulation in the Mrgprd-expressed DRG neurons significantly reversed the spinal nerve ligation (SNL)-induced reduction of the calcium-activated potassium channel subfamily N member 1 (KCNN1) in these DRG neurons and alleviated the SNL-induced mechanical hypersensitivity, without affecting the SNL-induced heat and cold nociceptive hypersensitivities, on the ipsilateral side. Conversely, mimicking SS-lncRNA downregulation in the Mrgprd-expressed DRG neurons reduced basal KCNN1 expression in these DRG neurons and produced the enhanced response to mechanical stimulation, but not thermal and cold stimuli, on bilateral sides. Mechanistically, SS-lncRNA downregulation caused a reduction in its binding to lysine-specific demethylase 6B (KDM6B) and consequent recruitment of less KDM6B to Kcnn1 promoter and an increase of H3K27me3 enrichment in this promoter in injured DRG. SIGNIFICANCE Our findings suggest that SS-lncRNA downregulation in small non-peptidergic sensory neurons is required specifically for nerve injury-induced mechanical hypersensitivity likely through silencing KCNN1 expression caused by KDM6B-gated increase of H3K27me3 enrichment in Kcnn1 promoter in these neurons.
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Affiliation(s)
- Bing Wang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Yingping Liang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Alex Bekker
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Huijuan Hu
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA; Department of Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA; Department of Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA; Department of Cell Biology & Molecular Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA.
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10
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Deng Y, Tang S, Cheng J, Zhang X, Jing D, Lin Z, Zhou J. Integrated analysis reveals Atf3 promotes neuropathic pain via orchestrating JunB mediated release of inflammatory cytokines in DRG macrophage. Life Sci 2023; 329:121939. [PMID: 37451398 DOI: 10.1016/j.lfs.2023.121939] [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: 03/17/2023] [Revised: 06/08/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
The dorsal root ganglion (DRG) is actively involved in the development of neuropathic pain (NP), serving as an intermediate station for pain signals from the peripheral nervous system to the central nervous system. The mechanism by which DRG is involved in NP regulation is not fully understood. The immune system plays a pivotal role in the physiological and pathological states of the human body. In recent years, the immune system has been thought to play an increasingly important role in the pathogenesis of NP. The immune system plays a key role in pain through specific immune cells and their immune-related genes (IRGs). However, the mechanism by which IRGs of DRG regulate NP action has not been fully elucidated. Here, we performed Gene Ontology (GO) and the Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses of IRGs in DRG bulk-RNA sequencing data from spared nerve injury (SNI) model mice and found that their IRGs were enriched in many pathways, especially in the immune response pathway. Subsequently, we analyzed single-cell RNA sequencing (scRNA-seq) data from DRGs extracted from the SNI model and identified eight cell populations. Among them, the highest IRG activity was presented in macrophages. Next, we analyzed the scRNA and bulk-sequencing data and deduced five common transcription factors (TFs) from differentially expressed genes (DEGs). The protein-protein interaction (PPI) network suggested that Atf3 and JunB are closely related. In vitro experiments, we verified that the protein and mRNA expressions of Atf3 and JunB were up-regulated in macrophages after lipopolysaccharide (LPS) stimulation. Moreover, the down-regulation of Atf3 reduced the release of inflammatory cytokines and decreased the protein and mRNA expression levels of JunB. The down-regulation of JunB also reduced the release of inflammatory cytokines. Furthermore, overexpression of JunB attenuated the effect of Atf3 down-regulation in reducing the release of inflammatory cytokines. Therefore, we speculated that Atf3 might promote NP through JunB-mediated release of inflammatory factors in DRG macrophages.
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Affiliation(s)
- Yingdong Deng
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong Province 510000, China
| | - Simin Tang
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong Province 510000, China
| | - Jiurong Cheng
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong Province 510000, China
| | - Xiangsheng Zhang
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong Province 510000, China
| | - Danqin Jing
- College of Anesthesiology, Shanxi Medical University, Taiyuan, Shanxi Province 030001, China
| | - Ziqiang Lin
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong Province 510000, China
| | - Jun Zhou
- Department of Anesthesiology, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong Province 510000, China.
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11
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Yang P, Qin Y, Zeng L, He Y, Xie Y, Cheng X, Huang W, Cao L. Crotonylation and disease: Current progress and future perspectives. Biomed Pharmacother 2023; 165:115108. [PMID: 37392654 DOI: 10.1016/j.biopha.2023.115108] [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: 04/28/2023] [Revised: 06/18/2023] [Accepted: 06/28/2023] [Indexed: 07/03/2023] Open
Abstract
Histone lysine crotonylation was first identified as a new type of post-translational modification in 2011. In recent years, prominent progress has been made in the study of histone and nonhistone crotonylation in reproduction, development, and disease. Although the regulatory enzyme systems and targets of crotonylation partially overlap with those of acetylation, the peculiar CC bond structure of crotonylation suggests that crotonylation may have specific biological functions. In this review, we summarize the latest research progress regarding crotonylation, especially its regulatory factors and relationship with diseases, which suggest further research directions for crotonylation and provide new ideas for developing disease intervention and treatment regimens.
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Affiliation(s)
- Ping Yang
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Metabolic Vascular Disease Key Laboratory of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Sichuan Clinical Research Center for Nephropathy, Luzhou 646000 Sichuan, China
| | - Yuanyuan Qin
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Metabolic Vascular Disease Key Laboratory of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Sichuan Clinical Research Center for Nephropathy, Luzhou 646000 Sichuan, China
| | - Lisha Zeng
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China
| | - Yanqiu He
- Department of Endocrinology and Metabolism, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Metabolic Vascular Disease Key Laboratory of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Sichuan Clinical Research Center for Nephropathy, Luzhou 646000 Sichuan, China
| | - Yumei Xie
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Metabolic Vascular Disease Key Laboratory of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Sichuan Clinical Research Center for Nephropathy, Luzhou 646000 Sichuan, China
| | - Xi Cheng
- Department of Endocrinology and Metabolism, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Metabolic Vascular Disease Key Laboratory of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Sichuan Clinical Research Center for Nephropathy, Luzhou 646000 Sichuan, China
| | - Wei Huang
- Department of Endocrinology and Metabolism, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Metabolic Vascular Disease Key Laboratory of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China; Sichuan Clinical Research Center for Nephropathy, Luzhou 646000 Sichuan, China.
| | - Ling Cao
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000 Sichuan, China.
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12
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Reddy D, Wickman JR, Ajit SK. Epigenetic regulation in opioid induced hyperalgesia. NEUROBIOLOGY OF PAIN (CAMBRIDGE, MASS.) 2023; 14:100146. [PMID: 38099284 PMCID: PMC10719581 DOI: 10.1016/j.ynpai.2023.100146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/14/2023] [Accepted: 11/21/2023] [Indexed: 12/17/2023]
Abstract
About 25 million American adults experience pain daily and one of the most commonly prescribed drugs to treat pain are opioids. Prolonged opioid usage and dose escalations can cause a paradoxical response where patients experience enhanced pain sensitivity. This opioid induced hyperalgesia (OIH) is a major hurdle when treating pain in the clinic because its underlying mechanisms are still not fully understood. OIH is also commonly overlooked and lacks guidelines to prevent its onset. Research on pain disorders and opioid usage have recognized potential epigenetic drivers of disease including DNA methylation, histone modifications, miRNA regulation, but their involvement in OIH has not been well studied. This article discusses epigenetic changes that may contribute to pathogenesis, with an emphasis on miRNA alterations in OIH. There is a crucial gap in knowledge including how multiple epigenetic modulators contribute to OIH. Elucidating the epigenetic changes underlying OIH and the crosstalk among these mechanisms could lead to the development of novel targets for the prevention and treatment of this painful phenomena.
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Affiliation(s)
- Deepa Reddy
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Philadelphia, PA 19102, USA
| | - Jason R. Wickman
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Philadelphia, PA 19102, USA
| | - Seena K. Ajit
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Philadelphia, PA 19102, USA
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13
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Jackson P, Spector AL, Strath LJ, Antoine LH, Li P, Goodin BR, Hidalgo BA, Kempf MC, Gonzalez CE, Jones AC, Foster TC, Peterson JA, Quinn T, Huo Z, Fillingim R, Cruz-Almeida Y, Aroke EN. Epigenetic age acceleration mediates the relationship between neighborhood deprivation and pain severity in adults with or at risk for knee osteoarthritis pain. Soc Sci Med 2023; 331:116088. [PMID: 37473540 PMCID: PMC10407756 DOI: 10.1016/j.socscimed.2023.116088] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/08/2023] [Accepted: 07/08/2023] [Indexed: 07/22/2023]
Abstract
An estimated 250 million people worldwide suffer from knee osteoarthritis (KOA), with older adults having greater risk. Like other age-related diseases, residents of high-deprivation neighborhoods experience worse KOA pain outcomes compared to their more affluent neighbors. The purpose of this study was to examine the relationship between neighborhood deprivation and pain severity in KOA and the influence of epigenetic age acceleration (EpAA) on that relationship. The sample of 128 participants was mostly female (60.9%), approximately half non-Hispanic Black (49.2%), and had a mean age of 58 years. Spearman bivariate correlations revealed that pain severity positively correlated with EpAA (ρ = 0.47, p ≤ 0.001) and neighborhood deprivation (ρ = 0.25, p = 0.004). We found a positive significant relationship between neighborhood deprivation and EpAA (ρ = 0.47, p ≤ 0.001). Results indicate a mediating relationship between neighborhood deprivation (predictor), EpAA (mediator), and pain severity (outcome variable). There was a significant indirect effect of neighborhood deprivation on pain severity through EpAA, as the mediator accounted for a moderate portion of the total effect, PM = 0.44. Epigenetic age acceleration may act as a mechanism through which neighborhood deprivation leads to worse KOA pain outcomes and may play a role in the well-documented relationship between the neighborhood of residence and age-related diseases.
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Affiliation(s)
- Pamela Jackson
- School of Public Health, University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, AL, 35294, USA.
| | - Antoinette L Spector
- School of Rehabilitation Sciences and Technology, University of Wisconsin-Milwaukee, PO Box 413, Milwaukee, WI, 53201, USA; Pain Research and Intervention Center of Excellence (PRICE), University of Florida, 2004 Mowry Road, Gainesville, FL, 32610, USA.
| | - Larissa J Strath
- Department of Community Dentistry and Behavioral Science, University of Florida, 1329 16th Street Southwest, Gainesville, FL, 32608, USA; Pain Research and Intervention Center of Excellence (PRICE), University of Florida, 2004 Mowry Road, Gainesville, FL, 32610, USA.
| | - Lisa H Antoine
- Department of Psychology, University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, AL, 35294, USA.
| | - Peng Li
- School of Nursing, University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, AL, 35294, USA.
| | - Burel R Goodin
- Washington University Pain Center, Department of Anesthesiology, Washington University School of Medicine in St. Louis, USA.
| | - Bertha A Hidalgo
- School of Public Health, University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, AL, 35294, USA.
| | - Mirjam-Colette Kempf
- School of Nursing, University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, AL, 35294, USA.
| | - Cesar E Gonzalez
- Department of Psychology, University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, AL, 35294, USA.
| | - Alana C Jones
- School of Public Health, University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, AL, 35294, USA.
| | - Thomas C Foster
- Department of Neuroscience, University of Florida, 1149 Newell Dr, Gainesville, FL, 32610, USA.
| | - Jessica A Peterson
- Pain Research and Intervention Center of Excellence (PRICE), University of Florida, 2004 Mowry Road, Gainesville, FL, 32610, USA.
| | - Tammie Quinn
- Department of Psychology, University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, AL, 35294, USA.
| | - Zhiguang Huo
- Department of Biostatistics, University of Florida, 2004 Mowry Road, Gainesville, FL, 32603, USA.
| | - Roger Fillingim
- Department of Community Dentistry and Behavioral Science, University of Florida, 1329 16th Street Southwest, Gainesville, FL, 32608, USA; Pain Research and Intervention Center of Excellence (PRICE), University of Florida, 2004 Mowry Road, Gainesville, FL, 32610, USA.
| | - Yenisel Cruz-Almeida
- Department of Community Dentistry and Behavioral Science, University of Florida, 1329 16th Street Southwest, Gainesville, FL, 32608, USA; Pain Research and Intervention Center of Excellence (PRICE), University of Florida, 2004 Mowry Road, Gainesville, FL, 32610, USA; Department of Neuroscience, University of Florida, 1149 Newell Dr, Gainesville, FL, 32610, USA.
| | - Edwin N Aroke
- School of Nursing, University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, AL, 35294, USA.
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14
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Rivi V, Rigillo G, Toscano Y, Benatti C, Blom JMC. Narrative Review of the Complex Interaction between Pain and Trauma in Children: A Focus on Biological Memory, Preclinical Data, and Epigenetic Processes. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1217. [PMID: 37508714 PMCID: PMC10378710 DOI: 10.3390/children10071217] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/07/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023]
Abstract
The incidence and collective impact of early adverse experiences, trauma, and pain continue to increase. This underscores the urgent need for translational efforts between clinical and preclinical research to better understand the underlying mechanisms and develop effective therapeutic approaches. As our understanding of these issues improves from studies in children and adolescents, we can create more precise preclinical models and ultimately translate our findings back to clinical practice. A multidisciplinary approach is essential for addressing the complex and wide-ranging effects of these experiences on individuals and society. This narrative review aims to (1) define pain and trauma experiences in childhood and adolescents, (2) discuss the relationship between pain and trauma, (3) consider the role of biological memory, (4) decipher the relationship between pain and trauma using preclinical data, and (5) examine the role of the environment by introducing the importance of epigenetic processes. The ultimate scope is to better understand the wide-ranging effects of trauma, abuse, and chronic pain on children and adolescents, how they occur, and how to prevent or mitigate their effects and develop effective treatment strategies that address both the underlying causes and the associated physiological and psychological effects.
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Affiliation(s)
- Veronica Rivi
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Giovanna Rigillo
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Ylenia Toscano
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Cristina Benatti
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
- Centre of Neuroscience and Neurotechnology, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Johanna Maria Catharina Blom
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
- Centre of Neuroscience and Neurotechnology, University of Modena and Reggio Emilia, 41125 Modena, Italy
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15
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Branham EM, McLean SA, Deliwala I, Mauck MC, Zhao Y, McKibben LA, Lee A, Spencer AB, Zannas AS, Lechner M, Danza T, Velilla MA, Hendry PL, Pearson C, Peak DA, Jones J, Rathlev NK, Linnstaedt SD. CpG Methylation Levels in HPA Axis Genes Predict Chronic Pain Outcomes Following Trauma Exposure. THE JOURNAL OF PAIN 2023; 24:1127-1141. [PMID: 36906051 PMCID: PMC10330094 DOI: 10.1016/j.jpain.2023.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/21/2023] [Accepted: 03/01/2023] [Indexed: 03/12/2023]
Abstract
Chronic post-traumatic musculoskeletal pain (CPTP) is a common outcome of traumatic stress exposure. Biological factors that influence the development of CPTP are poorly understood, though current evidence indicates that the hypothalamic-pituitary-adrenal (HPA) axis plays a critical role in its development. Little is known about molecular mechanisms underlying this association, including epigenetic mechanisms. Here, we assessed whether peritraumatic DNA methylation levels at 248 5'-C-phosphate-G-3' (CpG) sites in HPA axis genes (FKBP5, NR3C1, CRH, CRHR1, CRHR2, CRHBP, POMC) predict CPTP and whether identified CPTP-associated methylation levels influence expression of those genes. Using participant samples and data collected from trauma survivors enrolled into longitudinal cohort studies (n = 290), we used linear mixed modeling to assess the relationship between peritraumatic blood-based CpG methylation levels and CPTP. A total of 66 (27%) of the 248 CpG sites assessed in these models statistically significantly predicted CPTP, with the three most significantly associated CpG sites originating from the POMC gene region (ie, cg22900229 [β = .124, P < .001], cg16302441 [β = .443, P < .001], cg01926269 [β = .130, P < .001]). Among the genes analyzed, both POMC (z = 2.36, P = .018) and CRHBP (z = 4.89, P < .001) were enriched in CpG sites significantly associated with CPTP. Further, POMC expression was inversely correlated with methylation levels in a CPTP-dependent manner (6-months NRS<4: r = -.59, P < .001; 6-months NRS ≥ 4: r = -.18, P = .2312). Our results suggest that methylation of HPA axis genes including POMC and CRHBP predict risk for and may contribute to vulnerability to CPTP. PERSPECTIVE: Peritraumatic blood levels of CpG methylation sites in HPA axis genes, particularly CpG sites in the POMC gene, predict CPTP development. This data substantially advances our understanding of epigenetic predictors and potential mediators of CPTP, a highly common, morbid, and hard-to-treat form of chronic pain.
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Affiliation(s)
- Erica M Branham
- Institute for Trauma Recovery, University of North Carolina, Chapel Hill, North Carolina; Department of Anesthesiology, University of North Carolina, Chapel Hill, North Carolina; Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, North Carolina
| | - Samuel A McLean
- Institute for Trauma Recovery, University of North Carolina, Chapel Hill, North Carolina; Department of Anesthesiology, University of North Carolina, Chapel Hill, North Carolina; Department of Emergency Medicine, University of North Carolina, Chapel Hill, North Carolina
| | - Ishani Deliwala
- Institute for Trauma Recovery, University of North Carolina, Chapel Hill, North Carolina; Department of Anesthesiology, University of North Carolina, Chapel Hill, North Carolina
| | - Matthew C Mauck
- Institute for Trauma Recovery, University of North Carolina, Chapel Hill, North Carolina; Department of Anesthesiology, University of North Carolina, Chapel Hill, North Carolina
| | - Ying Zhao
- Institute for Trauma Recovery, University of North Carolina, Chapel Hill, North Carolina; Department of Anesthesiology, University of North Carolina, Chapel Hill, North Carolina
| | - Lauren A McKibben
- Institute for Trauma Recovery, University of North Carolina, Chapel Hill, North Carolina; Department of Anesthesiology, University of North Carolina, Chapel Hill, North Carolina
| | - Aaron Lee
- Institute for Trauma Recovery, University of North Carolina, Chapel Hill, North Carolina; Department of Anesthesiology, University of North Carolina, Chapel Hill, North Carolina
| | - Alex B Spencer
- Institute for Trauma Recovery, University of North Carolina, Chapel Hill, North Carolina; Department of Anesthesiology, University of North Carolina, Chapel Hill, North Carolina
| | - Anthony S Zannas
- Institute for Trauma Recovery, University of North Carolina, Chapel Hill, North Carolina; Department of Psychiatry, University of North Carolina, Chapel Hill, North Carolina; Department of Genetics, University of North Carolina, Chapel Hill, North Carolina; Carolina Stress Initiative, University of North Carolina, Chapel Hill, North Carolina
| | - Megan Lechner
- Forensic Nursing Program, Memorial Health System, Colorado Springs, Colorado
| | - Teresa Danza
- Forensic Nursing Program, Albuquerque SANE Collaborative, Albuquerque, New Mexico
| | | | - Phyllis L Hendry
- Department of Emergency Medicine, University of Florida College of Medicine, Jacksonville, Florida
| | - Claire Pearson
- Department of Emergency Medicine, Detroit Receiving, Detroit, Michigan
| | - David A Peak
- Department of Emergency Medicine, Massachusetts General Hospital, Boston, Massachusetts
| | - Jeffrey Jones
- Department of Emergency Medicine, Spectrum Health Butterworth Campus, Grand Rapids, Michigan
| | - Niels K Rathlev
- Department of Emergency Medicine, University of Massachusetts Chan Medical School Baystate, Springfield, Massachusetts
| | - Sarah D Linnstaedt
- Institute for Trauma Recovery, University of North Carolina, Chapel Hill, North Carolina; Department of Anesthesiology, University of North Carolina, Chapel Hill, North Carolina; Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, North Carolina.
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16
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Lambert DG. Opioids and opioid receptors; understanding pharmacological mechanisms as a key to therapeutic advances and mitigation of the misuse crisis. BJA OPEN 2023; 6:100141. [PMID: 37588171 PMCID: PMC10430815 DOI: 10.1016/j.bjao.2023.100141] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/05/2023] [Accepted: 04/12/2023] [Indexed: 08/18/2023]
Abstract
Opioids are a mainstay in acute pain management and produce their effects and side effects (e.g., tolerance, opioid-use disorder and immune suppression) by interaction with opioid receptors. I will discuss opioid pharmacology in some controversial areas of enquiry of anaesthetic relevance. The main opioid target is the µ (mu,MOP) receptor but other members of the opioid receptor family, δ (delta; DOP) and κ (kappa; KOP) opioid receptors also produce analgesic actions. These are naloxone-sensitive. There is important clinical development relating to the Nociceptin/Orphanin FQ (NOP) receptor, an opioid receptor that is not naloxone-sensitive. Better understanding of the drivers for opioid effects and side effects may facilitate separation of side effects and production of safer drugs. Opioids bind to the receptor orthosteric site to produce their effects and can engage monomer or homo-, heterodimer receptors. Some ligands can drive one intracellular pathway over another. This is the basis of biased agonism (or functional selectivity). Opioid actions at the orthosteric site can be modulated allosterically and positive allosteric modulators that enhance opioid action are in development. As well as targeting ligand-receptor interaction and transduction, modulating receptor expression and hence function is also tractable. There is evidence for epigenetic associations with different types of pain and also substance misuse. As long as the opioid narrative is defined by the 'opioid crisis' the drive to remove them could gather pace. This will deny use where they are effective, and access to morphine for pain relief in low income countries.
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Wang H, Zhang F, Xu TW, Xu Y, Tian Y, Wu Y, Xu J, Hu S, Xu G. DNMT1 involved in the analgesic effect of folic acid on gastric hypersensitivity through downregulating ASIC1 in adult offspring rats with prenatal maternal stress. CNS Neurosci Ther 2023; 29:1678-1689. [PMID: 36852448 PMCID: PMC10173708 DOI: 10.1111/cns.14131] [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: 08/26/2022] [Revised: 11/30/2022] [Accepted: 12/10/2022] [Indexed: 03/01/2023] Open
Abstract
AIMS Gastric hypersensitivity (GHS) is a characteristic pathogenesis of functional dyspepsia (FD). DNA methyltransferase 1 (DNMT1) and acid-sensing ion channel 1 (ASIC1) are associated with GHS induced by prenatal maternal stress (PMS). The aim of this study was to investigate the mechanism of DNMT1 mediating the analgesic effect of folic acid (FA) on PMS-induced GHS. METHODS GHS was quantified by electromyogram recordings. The expression of DNMT1, DNMT3a, DNMT3b, and ASIC1 were detected by western blot, RT-PCR, and double-immunofluorescence. Neuronal excitability and proton-elicited currents of dorsal root ganglion (DRG) neurons were determined by whole-cell patch clamp recordings. RESULTS The expression of DNMT1, but not DNMT3a or DNMT3b, was decreased in DRGs of PMS rats. FA alleviated PMS-induced GHS and hyperexcitability of DRG neurons. FA also increased DNMT1 and decreased ASIC1 expression and sensitivity. Intrathecal injection of DNMT1 inhibitor DC-517 attenuated the effect of FA on GHS alleviation and ASIC1 downregulation. Overexpression of DNMT1 with lentivirus not only rescued ASIC1 upregulation and hypersensitivity, but also alleviated GHS and hyperexcitability of DRG neurons induced by PMS. CONCLUSIONS These results indicate that increased DNMT1 contributes to the analgesic effect of FA on PMS-induced GHS by reducing ASIC1 expression and sensitivity.
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Affiliation(s)
- Hong‐Jun Wang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
- Jiangsu Key Laboratory of Anesthesiology & Jiangsu Key Laboratory of Anesthesia and Analgesia Application TechnologyXuzhou Medical UniversityXuzhouChina
| | - Fu‐Chao Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Timothy W. Xu
- Suzhou Academy of Xi'an Jiaotong UniversitySuzhouChina
| | - Yu‐Cheng Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Yuan‐Qing Tian
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Yan‐Yan Wu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Ji‐Tian Xu
- Department of Physiology and NeurobiologyCollege of Basic Medical Sciences, Zhengzhou UniversityZhengzhouChina
| | - Shufen Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
| | - Guang‐Yin Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of NeuroscienceSoochow UniversitySuzhouJiangsuChina
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18
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Li L, Chen J, Li YQ. The Downregulation of Opioid Receptors and Neuropathic Pain. Int J Mol Sci 2023; 24:ijms24065981. [PMID: 36983055 PMCID: PMC10053236 DOI: 10.3390/ijms24065981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 03/18/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
Neuropathic pain (NP) refers to pain caused by primary or secondary damage or dysfunction of the peripheral or central nervous system, which seriously affects the physical and mental health of 7-10% of the general population. The etiology and pathogenesis of NP are complex; as such, NP has been a hot topic in clinical medicine and basic research for a long time, with researchers aiming to find a cure by studying it. Opioids are the most commonly used painkillers in clinical practice but are regarded as third-line drugs for NP in various guidelines due to the low efficacy caused by the imbalance of opioid receptor internalization and their possible side effects. Therefore, this literature review aims to evaluate the role of the downregulation of opioid receptors in the development of NP from the perspective of dorsal root ganglion, spinal cord, and supraspinal regions. We also discuss the reasons for the poor efficacy of opioids, given the commonness of opioid tolerance caused by NP and/or repeated opioid treatments, an angle that has received little attention to date; in-depth understanding might provide a new method for the treatment of NP.
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Affiliation(s)
- Lin Li
- Institute of Medical Research, Northwestern Polytechnical University, Xi'an 710072, China
- Department of Anatomy, Histology and Embryology and K. K. Leung Brain Research Centre, The Fourth Military Medical University, No. 169, West Changle Road, Xi'an 710032, China
| | - Jing Chen
- Department of Anatomy, Histology and Embryology and K. K. Leung Brain Research Centre, The Fourth Military Medical University, No. 169, West Changle Road, Xi'an 710032, China
| | - Yun-Qing Li
- Institute of Medical Research, Northwestern Polytechnical University, Xi'an 710072, China
- Department of Anatomy, Histology and Embryology and K. K. Leung Brain Research Centre, The Fourth Military Medical University, No. 169, West Changle Road, Xi'an 710032, China
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19
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Liu S, Yang S, Zhou X, Zhu X, Xu L, Li X, Gao Z, Sun T, Wei J, Tian L, Cheng H, Wei G, Huo FQ, Liang L. Nerve injury-induced upregulation of apolipoprotein E in dorsal root ganglion participates in neuropathic pain in male mice. Neuropharmacology 2023; 224:109372. [PMID: 36502869 DOI: 10.1016/j.neuropharm.2022.109372] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 12/03/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022]
Abstract
Apolipoprotein E (ApoE) is an apolipoprotein involved in lipid metabolism and is primarily responsible for lipid transport and cholesterol homeostasis in the central nervous system (CNS). The aim of this study is to explore the role of ApoE in the pathological development of neuropathic pain. First, we examined the location of ApoE in the dorsal root ganglion (DRG) and spinal cord in male mice using immunohistochemistry, and found that ApoE was predominantly expressed in DRG satellite glial cells (SGCs) and macrophages and spinal cord astrocytes. Using a spinal nerve ligation (SNL)-induced neuropathic pain mouse model, we found that nerve injury caused an increase in ApoE expression in the injured DRGs, but not in the spinal cord after SNL surgery. Furthermore, we observed reduced SNL-induced pain hypersensitivity in ApoE knockout mice compared to wild-type mice. Moreover, an antisense oligonucleotide (ASO) targeting the Apoe gene sequence, which was microinjected into the DRG or administered intrathecally, not only reduced ApoE expression in DRG but also attenuated SNL-induced pain hypersensitivity. Finally, we found that a tyrosine kinase receptor AXL, which was previously demonstrated to contribute to neuropathic pain, may mediate ApoE function under neuropathic pain condition. In conclusion, our data suggest that ApoE in DRG promote pain hypersensitivity via the DRG membrane receptor AXL in neurons under neuropathic pain conditions. This study revealed a novel mechanism between lipid homeostasis and neuropathic pain.
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Affiliation(s)
- Siyi Liu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Shuting Yang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Xiaoqiong Zhou
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Xuan Zhu
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250013, China
| | - Linping Xu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Xiang Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Zihao Gao
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Tingkai Sun
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Jianxiong Wei
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Lixia Tian
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Hong Cheng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China
| | - Guihua Wei
- Institute of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Fu-Quan Huo
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi, 710061, China
| | - Lingli Liang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; Institute of Neuroscience, Translational Medicine Institute, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi, 710061, China.
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20
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Han G, Li X, Wen CH, Wu S, He L, Tan C, Nivar J, Bekker A, Davidson S, Tao YX. FUS Contributes to Nerve Injury-Induced Nociceptive Hypersensitivity by Activating NF-κB Pathway in Primary Sensory Neurons. J Neurosci 2023; 43:1267-1278. [PMID: 36627209 PMCID: PMC9962786 DOI: 10.1523/jneurosci.2082-22.2022] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/15/2022] [Accepted: 12/22/2022] [Indexed: 01/12/2023] Open
Abstract
Dysregulation of pain-associated genes in the dorsal root ganglion (DRG) is considered to be a molecular basis of neuropathic pain genesis. Fused in sarcoma (FUS), a DNA/RNA-binding protein, is a critical regulator of gene expression. However, whether it contributes to neuropathic pain is unknown. This study showed that peripheral nerve injury caused by the fourth lumbar (L4) spinal nerve ligation (SNL) or chronic constriction injury (CCI) of the sciatic nerve produced a marked increase in the expression of FUS protein in injured DRG neurons. Blocking this increase through microinjection of the adeno-associated virus (AAV) 5-expressing Fus shRNA into the ipsilateral L4 DRG mitigated the SNL-induced nociceptive hypersensitivities in both male and female mice. This microinjection also alleviated the SNL-induced increases in the levels of phosphorylated extracellular signal-regulated kinase 1/2 (p-ERK1/2) and glial fibrillary acidic protein (GFAP) in the ipsilateral L4 dorsal horn. Furthermore, mimicking this increase through microinjection of AAV5 expressing full-length Fus mRNA into unilateral L3/4 DRGs produced the elevations in the levels of p-ERK1/2 and GFAP in the dorsal horn, enhanced responses to mechanical, heat and cold stimuli, and induced the spontaneous pain on the ipsilateral side of both male and female mice in the absence of SNL. Mechanistically, the increased FUS activated the NF-κB signaling pathway by promoting the translocation of p65 into the nucleus and phosphorylation of p65 in the nucleus from injured DRG neurons. Our results indicate that DRG FUS contributes to neuropathic pain likely through the activation of NF-κB in primary sensory neurons.SIGNIFICANCE STATEMENT In the present study, we reported that fused in sarcoma (FUS), a DNA/RNA-binding protein, is upregulated in injured dorsal root ganglion (DRG) following peripheral nerve injury. This upregulation is responsible for nerve injury-induced translocation of p65 into the nucleus and phosphorylation of p65 in the nucleus from injured DRG neurons. Because blocking this upregulation alleviates nerve injury-induced nociceptive hypersensitivity, DRG FUS participates in neuropathic pain likely through the activation of NF-κB in primary sensory neurons. FUS may be a potential target for neuropathic pain management.
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Affiliation(s)
- Guang Han
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
| | - Xiang Li
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
| | - Chun-Hsien Wen
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
| | - Shaogen Wu
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
| | - Long He
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
| | - Cynthia Tan
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
| | - John Nivar
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
| | - Alex Bekker
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
| | - Steve Davidson
- Department of Anesthesiology, Pain Research Center, and Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
- Department of Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
- Departments of Cell Biology & Molecular Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
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21
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Zhang L, Li X, Feng X, Berkman T, Ma R, Du S, Wu S, Huang C, Amponsah A, Bekker A, Tao YX. E74-like factor 1 contributes to nerve trauma-induced nociceptive hypersensitivity through transcriptionally activating matrix metalloprotein-9 in dorsal root ganglion neurons. Pain 2023; 164:119-131. [PMID: 35507368 PMCID: PMC9633582 DOI: 10.1097/j.pain.0000000000002673] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 04/20/2022] [Indexed: 01/09/2023]
Abstract
ABSTRACT Nerve trauma-induced alternations of gene expression in the neurons of dorsal root ganglion (DRG) participate in nerve trauma-caused nociceptive hypersensitivity. Transcription factors regulate gene expression. Whether the transcription factor E74-like factor 1 (ELF1) in the DRG contributes to neuropathic pain is unknown. We report here that peripheral nerve trauma caused by chronic constriction injury (CCI) of unilateral sciatic nerve or unilateral fourth lumbar spinal nerve ligation led to the time-dependent increases in the levels of Elf1 mRNA and ELF1 protein in injured DRG, but not in the spinal cord. Preventing this increase through DRG microinjection of adeno-associated virus 5 expressing Elf1 shRNA attenuated the CCI-induced upregulation of matrix metallopeptidase 9 (MMP9) in injured DRG and induction and maintenance of nociceptive hypersensitivities, without changing locomotor functions and basal responses to acute mechanical, heat, and cold stimuli. Mimicking this increase through DRG microinjection of AAV5 expressing full-length Elf1 upregulated DRG MMP9 and produced enhanced responses to mechanical, heat, and cold stimuli in naive mice. Mechanistically, more ELF1 directly bond to and activated Mmp9 promoter in injured DRG neurons after CCI. Our data indicate that ELF1 participates in nerve trauma-caused nociceptive hypersensitivity likely through upregulating MMP9 in injured DRG. E74-like factor 1 may be a new target for management of neuropathic pain.
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Affiliation(s)
- Luyao Zhang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Xiang Li
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Xiaozhou Feng
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Tolga Berkman
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Ruining Ma
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Shibin Du
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Shaogen Wu
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Congcong Huang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Akwasi Amponsah
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Alex Bekker
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
- Departments of Cell Biology & Molecular Medicine and Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
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22
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Lysine-specific demethylase 1 in primary sensory neurons participates in chronic compression of dorsal root ganglion–induced neuropathic pain. Brain Res Bull 2022; 191:30-39. [DOI: 10.1016/j.brainresbull.2022.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 10/03/2022] [Accepted: 10/10/2022] [Indexed: 11/18/2022]
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23
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Yeo M, Zhang Q, Ding L, Shen X, Chen Y, Liedtke W. Spinal cord dorsal horn sensory gate in preclinical models of chemotherapy-induced painful neuropathy and contact dermatitis chronic itch becomes less leaky with Kcc2 gene expression-enhancing treatments. Front Mol Neurosci 2022; 15:911606. [PMID: 36504679 PMCID: PMC9731339 DOI: 10.3389/fnmol.2022.911606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 10/05/2022] [Indexed: 11/25/2022] Open
Abstract
Low intraneuronal chloride in spinal cord dorsal horn (SCDH) pain relay neurons is of critical relevance for physiological transmission of primary sensory afferents because low intraneuronal chloride dictates GABA-ergic and glycin-ergic neurotransmission to be inhibitory. If neuronal chloride rises to unphysiological levels, the primary sensory gate in the spinal cord dorsal horn becomes corrupted, with resulting behavioral hallmarks of hypersensitivity and allodynia, for example in pathological pain. Low chloride in spinal cord dorsal horn neurons relies on the robust gene expression of Kcc2 and sustained transporter function of the KCC2 chloride-extruding electroneutral transporter. Based on a recent report where we characterized the GSK3-inhibitory small molecule, kenpaullone, as a Kcc2 gene expression-enhancer that potently repaired diminished Kcc2 expression and KCC2 transporter function in SCDH pain relay neurons, we extend our recent findings by reporting (i) effective pain control in a preclinical model of taxol-induced painful peripheral neuropathy that was accomplished by topical application of a TRPV4/TRPA1 dual-inhibitory compound (compound 16-8), and was associated with the repair of diminished Kcc2 gene expression in the SCDH; and (ii) potent functioning of kenpaullone as an antipruritic in a DNFB contact dermatitis preclinical model. These observations suggest that effective peripheral treatment of chemotherapy-induced painful peripheral neuropathy impacts the pain-transmitting neural circuit in the SCDH in a beneficial manner by enhancing Kcc2 gene expression, and that chronic pruritus might be relayed in the primary sensory gate of the spinal cord, following similar principles as pathological pain, specifically relating to the critical functioning of Kcc2 gene expression and the KCC2 transporter function.
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Affiliation(s)
- Michele Yeo
- Departments of Neurosurgery, Duke University Medical Center, Durham, NC, United States
| | - Qiaojuan Zhang
- Departments of Neurology, Duke University Medical Center, Durham, NC, United States
| | - LeAnne Ding
- Departments of Neurology, Duke University Medical Center, Durham, NC, United States
| | - Xiangjun Shen
- Departments of Neurology, Duke University Medical Center, Durham, NC, United States
| | - Yong Chen
- Departments of Neurology, Duke University Medical Center, Durham, NC, United States,*Correspondence: Yong Chen
| | - Wolfgang Liedtke
- Departments of Neurology, Duke University Medical Center, Durham, NC, United States,Wolfgang Liedtke
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24
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Giordano R, Kjær-Staal Petersen K, Arendt-Nielsen L. The link between epigenetics, pain sensitivity and chronic pain. Scand J Pain 2022; 22:664-666. [PMID: 36149940 DOI: 10.1515/sjpain-2022-0086] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 07/18/2022] [Indexed: 11/15/2022]
Abstract
Increasing evidence suggests an association between gene expression and clinical pain. Epigenetic modifications are the main modulators of gene expression or protein translation in response to environmental stimuli and pathophysiological conditions. Preclinical and clinical studies indicate that epigenetic modifications could also impact the development of pain, the transition from acute to chronic pain, and the maintenance hereof.
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Affiliation(s)
- Rocco Giordano
- Center for Neuroplasticity and Pain (CNAP), SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark
| | - Kristian Kjær-Staal Petersen
- Center for Neuroplasticity and Pain (CNAP), SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark
- Center for Mathematical Modeling of Knee Osteoarthritis (MathKOA), Department of Material and Production, Faculty of Engineering and Science, Aalborg University, Aalborg, Denmark
| | - Lars Arendt-Nielsen
- Center for Neuroplasticity and Pain (CNAP), SMI, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark
- Center for Mathematical Modeling of Knee Osteoarthritis (MathKOA), Department of Material and Production, Faculty of Engineering and Science, Aalborg University, Aalborg, Denmark
- Department of Medical Gastroenterology, Mech-Sense, Aalborg University Hospital, Aalborg, Denmark
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25
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Higginbotham JA, Markovic T, Massaly N, Morón JA. Endogenous opioid systems alterations in pain and opioid use disorder. Front Syst Neurosci 2022; 16:1014768. [PMID: 36341476 PMCID: PMC9628214 DOI: 10.3389/fnsys.2022.1014768] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 09/26/2022] [Indexed: 11/25/2022] Open
Abstract
Decades of research advances have established a central role for endogenous opioid systems in regulating reward processing, mood, motivation, learning and memory, gastrointestinal function, and pain relief. Endogenous opioid systems are present ubiquitously throughout the central and peripheral nervous system. They are composed of four families, namely the μ (MOPR), κ (KOPR), δ (DOPR), and nociceptin/orphanin FQ (NOPR) opioid receptors systems. These receptors signal through the action of their endogenous opioid peptides β-endorphins, dynorphins, enkephalins, and nociceptins, respectfully, to maintain homeostasis under normal physiological states. Due to their prominent role in pain regulation, exogenous opioids-primarily targeting the MOPR, have been historically used in medicine as analgesics, but their ability to produce euphoric effects also present high risks for abuse. The ability of pain and opioid use to perturb endogenous opioid system function, particularly within the central nervous system, may increase the likelihood of developing opioid use disorder (OUD). Today, the opioid crisis represents a major social, economic, and public health concern. In this review, we summarize the current state of the literature on the function, expression, pharmacology, and regulation of endogenous opioid systems in pain. Additionally, we discuss the adaptations in the endogenous opioid systems upon use of exogenous opioids which contribute to the development of OUD. Finally, we describe the intricate relationship between pain, endogenous opioid systems, and the proclivity for opioid misuse, as well as potential advances in generating safer and more efficient pain therapies.
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Affiliation(s)
- Jessica A. Higginbotham
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, United States
- Pain Center, Washington University in St. Louis, St. Louis, MO, United States
- School of Medicine, Washington University in St. Louis, St. Louis, MO, United States
| | - Tamara Markovic
- Nash Family Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Nicolas Massaly
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, United States
- Pain Center, Washington University in St. Louis, St. Louis, MO, United States
- School of Medicine, Washington University in St. Louis, St. Louis, MO, United States
| | - Jose A. Morón
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, United States
- Pain Center, Washington University in St. Louis, St. Louis, MO, United States
- School of Medicine, Washington University in St. Louis, St. Louis, MO, United States
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, United States
- Department of Psychiatry, Washington University in St. Louis, St. Louis, MO, United States
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26
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Mao Q, Tian L, Wei J, Zhou X, Cheng H, Zhu X, Li X, Gao Z, Zhang X, Liang L. Transcriptome analysis of microRNAs, circRNAs, and mRNAs in the dorsal root ganglia of paclitaxel-induced mice with neuropathic pain. Front Mol Neurosci 2022; 15:990260. [PMID: 36117915 PMCID: PMC9470859 DOI: 10.3389/fnmol.2022.990260] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 08/02/2022] [Indexed: 11/13/2022] Open
Abstract
The microtubule-stabilizing drug paclitaxel (PTX) is a chemotherapeutic agent widely prescribed for the treatment of various tumor types. The main adverse effect of PTX-mediated therapy is chemotherapy-induced peripheral neuropathy (CIPN) and neuropathic pain, which are similar to the adverse effects associated with other chemotherapeutic agents. Dorsal root ganglia (DRG) contain primary sensory neurons; any damage to these neurons or their axons may lead to neuropathic pain. To gain molecular and neurobiological insights into the peripheral sensory system under conditions of PTX-induced neuropathic pain, we used transcriptomic analysis to profile mRNA and non-coding RNA expression in the DRGs of adult male C57BL/6 mice treated using PTX. RNA sequencing and in-depth gene expression analysis were used to analyze the expression levels of 67,228 genes. We identified 372 differentially expressed genes (DEGs) in the DRGs of vehicle- and PTX-treated mice. Among the 372 DEGs, there were 8 mRNAs, 3 long non-coding RNAs (lncRNAs), 16 circular RNAs (circRNAs), and 345 microRNAs (miRNAs). Moreover, the changes in the expression levels of several miRNAs and circRNAs induced by PTX have been confirmed using the quantitative polymerase chain reaction method. In addition, we compared the expression levels of differentially expressed miRNAs and mRNA in the DRGs of mice with PTX-induced neuropathic pain against those evaluated in other models of neuropathic pain induced by other chemotherapeutic agents, nerve injury, or diabetes. There are dozens of shared differentially expressed miRNAs between PTX and diabetes, but only a few shared miRNAs between PTX and nerve injury. Meanwhile, there is no shared differentially expressed mRNA between PTX and nerve injury. In conclusion, herein, we show that treatment with PTX induced numerous changes in miRNA expression in DRGs. Comparison with other neuropathic pain models indicates that DEGs in DRGs vary greatly among different models of neuropathic pain.
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Affiliation(s)
- Qingxiang Mao
- Department of Anesthesiology, Daping Hospital, Army Medical University, Chongqing, China
| | - Lixia Tian
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Jianxiong Wei
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Xiaoqiong Zhou
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Hong Cheng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Xuan Zhu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Xiang Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Zihao Gao
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Xi Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Lingli Liang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
- *Correspondence: Lingli Liang,
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Meda RT, Nuguru SP, Rachakonda S, Sripathi S, Khan MI, Patel N. Chronic Pain-Induced Depression: A Review of Prevalence and Management. Cureus 2022; 14:e28416. [PMID: 36171845 PMCID: PMC9509520 DOI: 10.7759/cureus.28416] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/25/2022] [Indexed: 11/05/2022] Open
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Ameenudeen S, Kashif M, Banerjee S, Srinivasan H, Pandurangan AK, Waseem M. Cellular and Molecular Machinery of Neuropathic Pain: an Emerging Insight. CURRENT PHARMACOLOGY REPORTS 2022; 8:227-235. [PMID: 35646513 PMCID: PMC9125010 DOI: 10.1007/s40495-022-00294-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 05/17/2022] [Indexed: 12/04/2022]
Abstract
Purpose of Review Neuropathic pain (NP) has been ubiquitously characterized by lesion and its linked somatosensory system either the central nervous system (CNS) or peripheral nervous system (PNS) This PNS episode is the most prevalent site of NP origin and is found to be associated with afferent nerve fibers carrying pain signals from injured/trauma site to the CNS including the brain. Several kinds of pharmacotherapeutic drugs shuch as analgesics, anti-convulsants, and anti-depressants are being employed for the its possible interventions. The NP has been a great interest to follow different pathophysiological mechanisms which are often considered to correlate with the metabolic pathways and its mediated disease. There is paucity of knowledge to make such mechanism via NP. Recent Finding Most notably, recent pandemic outbreak of COVID-19 has also been reported in chronic pain mediated diabetes, inflammatory disorders, and cancers. There is an increasing incidence of NP and its complex mechanism has now led to identify the possible investigations of responsible genes and proteins via bioinformatics tools. The analysis might be more instrumental as collecting the genes from pain genetic database, analyzing the variants through differential gene expression (DEG) and constructing the protein–protein interaction (PPI) networks and thereby determining their upregulating and downregulating pathways. Summary This review sheds a bright light towards several mechanisms at both cellular and molecular level, correlation of NP-mediated disease mechanism and possible cell surface biomarkers (receptors), and identified genes could be more promising for their pharmacological targets.
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Affiliation(s)
- Shabnam Ameenudeen
- School of Life Sciences, BS Abdur Rahman Crescent Institute of Science and Technology, GST Road, Vandalur, Chennai, 600048 Tamil Nadu India
| | - Mohd. Kashif
- School of Life Sciences, BS Abdur Rahman Crescent Institute of Science and Technology, GST Road, Vandalur, Chennai, 600048 Tamil Nadu India
| | - Subhamoy Banerjee
- Department of Basic Science and Humanities, Institute of Engineering and Management, Sector V, Salt Lake, Kolkata, 700091 India
| | - Hemalatha Srinivasan
- School of Life Sciences, BS Abdur Rahman Crescent Institute of Science and Technology, GST Road, Vandalur, Chennai, 600048 Tamil Nadu India
| | - Ashok Kumar Pandurangan
- School of Life Sciences, BS Abdur Rahman Crescent Institute of Science and Technology, GST Road, Vandalur, Chennai, 600048 Tamil Nadu India
| | - Mohammad Waseem
- School of Life Sciences, BS Abdur Rahman Crescent Institute of Science and Technology, GST Road, Vandalur, Chennai, 600048 Tamil Nadu India
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Zou Y, Bai XH, Kong LC, Xu FF, Ding TY, Zhang PF, Dong FL, Ling YJ, Jiang BC. Involvement of Histone Lysine Crotonylation in the Regulation of Nerve-Injury-Induced Neuropathic Pain. Front Immunol 2022; 13:885685. [PMID: 35911694 PMCID: PMC9329947 DOI: 10.3389/fimmu.2022.885685] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 06/22/2022] [Indexed: 11/13/2022] Open
Abstract
Histone lysine crotonylation (KCR), a novel epigenetic modification, is important in regulating a broad spectrum of biological processes and various diseases. However, whether KCR is involved in neuropathic pain remains to be elucidated. We found KCR occurs in macrophages, sensory neurons, and satellite glial cells of trigeminal ganglia (TG), neurons, astrocytes, and microglia of the medulla oblongata. KCR in TG was detected mainly in small and medium sensory neurons, to a lesser extent in large neurons. Peripheral nerve injury elevated KCR levels in macrophages in the trigeminal and dorsal root ganglia and microglia in the medulla oblongata but reduced KCR levels in sensory neurons. Inhibition of histone crotonyltransferases (p300) by intra-TG or intrathecal administration of C646 significantly alleviated partial infraorbital nerve transection (pIONT)- or spinal nerve ligation (SNL)-induced mechanical allodynia and thermal hyperalgesia. Intra-TG or intrathecal administration of Crotonyl coenzyme A trilithium salt to upregulate KCR dose-dependently induced mechanical allodynia and thermal hyperalgesia in mice. Mechanismly, inhibition of p300 alleviated pIONT-induced macrophage activation and reduced the expression of pain-related inflammatory cytokines Tnfα, Il1β and chemokines Ccl2 and Cxcl10. Correspondingly, exogenous crotonyl-CoA induced macrophage activation and the expression of Tnfα, Il1β, Il6, Ccl2 and Ccl7 in TG, which C646 can repress. These findings suggest that histone crotonylation might be functionally involved in neuropathic pain and neuroinflammation regulation.
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Affiliation(s)
- Yu Zou
- Pain Research Laboratory, Institute of Nautical Medicine, Nantong University, Nantong, China
| | - Xue-Hui Bai
- Pain Research Laboratory, Institute of Nautical Medicine, Nantong University, Nantong, China
| | - Ling-Chi Kong
- Pain Research Laboratory, Institute of Nautical Medicine, Nantong University, Nantong, China
| | - Fei-Fei Xu
- Medical School of Nantong University, Nantong, China
| | - Ting-Yu Ding
- Pain Research Laboratory, Institute of Nautical Medicine, Nantong University, Nantong, China
| | - Peng-Fei Zhang
- Pain Research Laboratory, Institute of Nautical Medicine, Nantong University, Nantong, China
| | - Fu-Lu Dong
- Medical School of Nantong University, Nantong, China
| | - Yue-Juan Ling
- Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, Nantong, China
- *Correspondence: Bao-Chun Jiang, ; Yue-Juan Ling,
| | - Bao-Chun Jiang
- Pain Research Laboratory, Institute of Nautical Medicine, Nantong University, Nantong, China
- *Correspondence: Bao-Chun Jiang, ; Yue-Juan Ling,
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30
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Jiang W, Tan XY, Li JM, Yu P, Dong M. DNA Methylation: A Target in Neuropathic Pain. Front Med (Lausanne) 2022; 9:879902. [PMID: 35872752 PMCID: PMC9301322 DOI: 10.3389/fmed.2022.879902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 06/06/2022] [Indexed: 11/13/2022] Open
Abstract
Neuropathic pain (NP), caused by an injury or a disease affecting the somatosensory nervous system of the central and peripheral nervous systems, has become a global health concern. Recent studies have demonstrated that epigenetic mechanisms are among those that underlie NP; thus, elucidating the molecular mechanism of DNA methylation is crucial to discovering new therapeutic methods for NP. In this review, we first briefly discuss DNA methylation, demethylation, and the associated key enzymes, such as methylases and demethylases. We then discuss the relationship between NP and DNA methylation, focusing on DNA methyltransferases including methyl-CpG-binding domain (MBD) family proteins and ten-eleven translocation (TET) enzymes. Based on experimental results of neuralgia in animal models, the mechanism of DNA methylation-related neuralgia is summarized, and useful targets for early drug intervention in NP are discussed.
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Affiliation(s)
- Wei Jiang
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, China
| | - Xuan-Yu Tan
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
| | - Jia-Ming Li
- Department of Emergency, The First Hospital of Jilin University, Changchun, China
| | - Peng Yu
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
- *Correspondence: Peng Yu
| | - Ming Dong
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, China
- Ming Dong
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31
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Du S, Wu S, Feng X, Wang B, Xia S, Liang L, Zhang L, Govindarajalu G, Bunk A, Kadakia F, Mao Q, Guo X, Zhao H, Berkman T, Liu T, Li H, Stillman J, Bekker A, Davidson S, Tao YX. A nerve injury-specific long noncoding RNA promotes neuropathic pain by increasing Ccl2 expression. J Clin Invest 2022; 132:153563. [PMID: 35775484 PMCID: PMC9246381 DOI: 10.1172/jci153563] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 05/19/2022] [Indexed: 01/25/2023] Open
Abstract
Maladaptive changes of nerve injury-associated genes in dorsal root ganglia (DRGs) are critical for neuropathic pain genesis. Emerging evidence supports the role of long noncoding RNAs (lncRNAs) in regulating gene transcription. Here we identified a conserved lncRNA, named nerve injury-specific lncRNA (NIS-lncRNA) for its upregulation in injured DRGs exclusively in response to nerve injury. This upregulation was triggered by nerve injury-induced increase in DRG ELF1, a transcription factor that bound to the NIS-lncRNA promoter. Blocking this upregulation attenuated nerve injury-induced CCL2 increase in injured DRGs and nociceptive hypersensitivity during the development and maintenance periods of neuropathic pain. Mimicking NIS-lncRNA upregulation elevated CCL2 expression, increased CCL2-mediated excitability in DRG neurons, and produced neuropathic pain symptoms. Mechanistically, NIS-lncRNA recruited more binding of the RNA-interacting protein FUS to the Ccl2 promoter and augmented Ccl2 transcription in injured DRGs. Thus, NIS-lncRNA participates in neuropathic pain likely by promoting FUS-triggered DRG Ccl2 expression and may be a potential target in neuropathic pain management.
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Affiliation(s)
- Shibin Du
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Shaogen Wu
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Xiaozhou Feng
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Bing Wang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Shangzhou Xia
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Lingli Liang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Li Zhang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Gokulapriya Govindarajalu
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Alexander Bunk
- Department of Anesthesiology, Pain Research Center, and Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Feni Kadakia
- Department of Anesthesiology, Pain Research Center, and Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Qingxiang Mao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Xinying Guo
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Hui Zhao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Tolga Berkman
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Tong Liu
- Center for Advanced Proteomics Research, Department of Microbiology, Biochemistry & Molecular Genetics
| | - Hong Li
- Center for Advanced Proteomics Research, Department of Microbiology, Biochemistry & Molecular Genetics
| | - Jordan Stillman
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Alex Bekker
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
| | - Steve Davidson
- Department of Anesthesiology, Pain Research Center, and Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA.,Department of Pharmacology, Physiology & Neuroscience, and,Department of Cell Biology & Molecular Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
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Jia S, Wei G, Bono J, Pan Z, Zheng B, Wang B, Adaralegbe A, Tenorio C, Bekker A, Tao YX. TET1 overexpression attenuates paclitaxel-induced neuropathic pain through rescuing K 2p1.1 expression in primary sensory neurons of male rats. Life Sci 2022; 297:120486. [PMID: 35304127 PMCID: PMC8976761 DOI: 10.1016/j.lfs.2022.120486] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/03/2022] [Accepted: 03/11/2022] [Indexed: 10/18/2022]
Abstract
AIMS Paclitaxel-induced downregulation of two-pore domain K+ channel 1.1 (K2p1.1) caused by increasing DNA methylation within its gene promoter in the dorsal root ganglion (DRG) contributes to neuropathic pain. Given that ten-eleven translocation methylcytosine dioxygenase 1 (TET1) promotes DNA demethylation and gene transcription, the present study investigated whether DRG overexpression of TET1 produces an antinociceptive effect on the paclitaxel-induced nociceptive hypersensitivity. MAIN METHODS TET1 was overexpressed in the DRG through unilateral microinjection of the herpes simplex virus expressing full-length Tet1 mRNA into the fourth and fifth lumbar DRGs of male rats. Behavioral tests were carried out to examine the effect of this overexpression on the paclitaxel-induced nociceptive hypersensitivity. Western blot analysis, chromatin immunoprecipitation assay and 5-hydroxymethylcytosine detection assay were performed to assess the levels of TET1/K2p1.1, 5-methylcytosine and 5-hydroxymethylcytosine, respectively. KEY FINDINGS DRG overexpression of TET1 mitigated the paclitaxel-induced mechanical allodynia, heat hyperalgesia and cold hyperalgesia on the ipsilateral side during the development and maintenance periods. Locomotor function or basal (acute) responses to mechanical, heat or cold stimuli were not affected. Mechanistically, DRG overexpression of TET1 rescued the expression of K2p1.1 by blocking the paclitaxel-induced increase in the level of 5-methylcytosine and correspondingly reversing the paclitaxel-induced decreases in the amount of 5-hydroxymethylcytosine within the K2p1.1 promoter region in the microinjected DRGs of male rats. SIGNIFICANCE Our findings suggest that DRG overexpression of TET1 alleviated chemotherapy-induced neuropathic pain likely through rescuing DRG K2p1.1 expression. Our findings may provide a potential avenue for the management of this disorder.
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Affiliation(s)
- Shushan Jia
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Guihua Wei
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Jamie Bono
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA,Rutgers School of Graduate Studies, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ07103, USA
| | - Zhiqiang Pan
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Bixin Zheng
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Bing Wang
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Adejuyigbe Adaralegbe
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Christopher Tenorio
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Alex Bekker
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA; Department of Cell Biology & Molecular Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark NJ07103, USA; Department of Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark NJ07103, USA.
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Liedtke W. Long March Toward Safe and Effective Analgesia by Enhancing Gene Expression of Kcc2: First Steps Taken. Front Mol Neurosci 2022; 15:865600. [PMID: 35645734 PMCID: PMC9137411 DOI: 10.3389/fnmol.2022.865600] [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: 01/30/2022] [Accepted: 03/08/2022] [Indexed: 11/15/2022] Open
Abstract
Low intraneuronal chloride in spinal cord dorsal horn pain relay neurons is critical for physiologic transmission of primary pain afferents because low intraneuronal chloride dictates whether GABA-ergic and glycin-ergic neurotransmission is inhibitory. If the neuronal chloride elevates to pathologic levels, then spinal cord primary pain relay becomes leaky and exhibits the behavioral hallmarks of pathologic pain, namely hypersensitivity and allodynia. Low chloride in spinal cord dorsal horn neurons is maintained by proper gene expression of Kcc2 and sustained physiologic function of the KCC2 chloride extruding electroneutral transporter. Peripheral nerve injury and other forms of neural injury evoke greatly diminished Kcc2 gene expression and subsequent corruption of inhibitory neurotransmission in the spinal cord dorsal horn, thus causing derailment of the gate function for pain. Here I review key discoveries that have helped us understand these fundamentals, and focus on recent insights relating to the discovery of Kcc2 gene expression enhancing compounds via compound screens in neurons. One such study characterized the kinase inhibitor, kenpaullone, more in-depth, revealing its function as a robust and long-lasting analgesic in preclinical models of nerve injury and cancer bone pain, also elucidating its mechanism of action via GSK3β inhibition, diminishing delta-catenin phosphorylation, and facilitating its nuclear transfer and subsequent enhancement of Kcc2 gene expression by de-repressing Kaiso epigenetic transcriptional regulator. Future directions re Kcc2 gene expression enhancement are discussed, namely combination with other analgesics and analgesic methods, such as spinal cord stimulation and electroacupuncture, gene therapy, and leveraging Kcc2 gene expression-enhancing nanomaterials.
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Sun Z, Waybright JM, Beldar S, Chen L, Foley CA, Norris‐Drouin JL, Lyu T, Dong A, Min J, Wang Y, James LI, Wang Y. Cdyl Deficiency Brakes Neuronal Excitability and Nociception through Promoting Kcnb1 Transcription in Peripheral Sensory Neurons. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2104317. [PMID: 35119221 PMCID: PMC8981457 DOI: 10.1002/advs.202104317] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 12/28/2021] [Indexed: 05/24/2023]
Abstract
Epigenetic modifications are involved in the onset, development, and maintenance of pain; however, the precise epigenetic mechanism underlying pain regulation remains elusive. Here it is reported that the epigenetic factor chromodomain Y-like (CDYL) is crucial for pain processing. Selective knockout of CDYL in sensory neurons results in decreased neuronal excitability and nociception. Moreover, CDYL facilitates histone 3 lysine 27 trimethylation (H3K27me3) deposition at the Kcnb1 intron region thus silencing voltage-gated potassium channel (Kv ) subfamily member Kv 2.1 transcription. Loss function of CDYL enhances total Kv and Kv 2.1 current density in dorsal root ganglia and knockdown of Kv 2.1 reverses the pain-related phenotypes of Cdyl deficiency mice. Furthermore, focal administration of a novel potent CDYL antagonist blunts nociception and attenuates neuropathic pain. These findings reveal that CDYL is a critical regulator of pain sensation and shed light on the development of novel analgesics targeting epigenetic mechanisms.
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Affiliation(s)
- Zhao‐Wei Sun
- Neuroscience Research Institute and Department of NeurobiologySchool of Basic Medical SciencesKey Laboratory for NeuroscienceMinistry of Education/National Health Commission and State Key Laboratory of Natural and Biomimetic DrugsPeking UniversityBeijing100083China
- Institute of Military Cognitive and Brain SciencesAcademy of Military Medical SciencesBeijing100039China
| | - Jarod M. Waybright
- Center for Integrative Chemical Biology and Drug DiscoveryDivision of Chemical Biology and Medicinal ChemistryUNC Eshelman School of PharmacyUniversity of North Carolina at Chapel HillChapel HillNC27599USA
| | - Serap Beldar
- Structural Genomics ConsortiumUniversity of Toronto101 College StreetTorontoOntarioM5G 1L7Canada
| | - Lu Chen
- Neuroscience Research Institute and Department of NeurobiologySchool of Basic Medical SciencesKey Laboratory for NeuroscienceMinistry of Education/National Health Commission and State Key Laboratory of Natural and Biomimetic DrugsPeking UniversityBeijing100083China
| | - Caroline A. Foley
- Center for Integrative Chemical Biology and Drug DiscoveryDivision of Chemical Biology and Medicinal ChemistryUNC Eshelman School of PharmacyUniversity of North Carolina at Chapel HillChapel HillNC27599USA
| | - Jacqueline L. Norris‐Drouin
- Center for Integrative Chemical Biology and Drug DiscoveryDivision of Chemical Biology and Medicinal ChemistryUNC Eshelman School of PharmacyUniversity of North Carolina at Chapel HillChapel HillNC27599USA
| | - Tian‐Jie Lyu
- Neuroscience Research Institute and Department of NeurobiologySchool of Basic Medical SciencesKey Laboratory for NeuroscienceMinistry of Education/National Health Commission and State Key Laboratory of Natural and Biomimetic DrugsPeking UniversityBeijing100083China
| | - Aiping Dong
- Structural Genomics ConsortiumUniversity of Toronto101 College StreetTorontoOntarioM5G 1L7Canada
| | - Jinrong Min
- Structural Genomics ConsortiumUniversity of Toronto101 College StreetTorontoOntarioM5G 1L7Canada
- Hubei Key Laboratory of Genetic Regulation and Integrative BiologySchool of Life SciencesCentral China Normal UniversityWuhanHubei430079China
- Department of PhysiologyUniversity of TorontoTorontoOntarioM5S 1A8Canada
| | - Yu‐Pu Wang
- Neuroscience Research Institute and Department of NeurobiologySchool of Basic Medical SciencesKey Laboratory for NeuroscienceMinistry of Education/National Health Commission and State Key Laboratory of Natural and Biomimetic DrugsPeking UniversityBeijing100083China
| | - Lindsey I. James
- Center for Integrative Chemical Biology and Drug DiscoveryDivision of Chemical Biology and Medicinal ChemistryUNC Eshelman School of PharmacyUniversity of North Carolina at Chapel HillChapel HillNC27599USA
| | - Yun Wang
- Neuroscience Research Institute and Department of NeurobiologySchool of Basic Medical SciencesKey Laboratory for NeuroscienceMinistry of Education/National Health Commission and State Key Laboratory of Natural and Biomimetic DrugsPeking UniversityBeijing100083China
- PKU‐IDG/McGovern Institute for Brain ResearchPeking UniversityBeijing100871China
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35
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Lai CY, Hsieh MC, Yeh CM, Yang PS, Cheng JK, Wang HH, Lin KH, Nie ST, Lin TB, Peng HY. MicroRNA-489-3p attenuates neuropathic allodynia by regulating oncoprotein DEK/TET1-dependent epigenetic modification in the dorsal horn. Neuropharmacology 2022; 210:109028. [PMID: 35304174 DOI: 10.1016/j.neuropharm.2022.109028] [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: 10/25/2021] [Revised: 03/08/2022] [Accepted: 03/10/2022] [Indexed: 11/18/2022]
Abstract
Originally characterized as an oncoprotein overexpressed in many forms of cancer that participates in numerous cellular pathways, DEK has since been well described regarding the regulation of epigenetic markers and transcription factors in neurons. However, its role in neuropathic allodynia processes remain elusive and intriguingly complex. Here, we show that DEK, which is induced in spinal dorsal horn neurons after spinal nerve ligation (SNL), is regulated by miR-489-3p. Moreover, SNL-induced decrease in miR-489-3p expression increased the expression of DEK, which recruited TET1 to the promoter fragments of the Bdnf, Grm5, and Stat3 genes, thereby enhancing their transcription in the dorsal horn. Remarkably, these effects were also induced by intrathecally administering naïve animals with miR-489-3p inhibitor, which could be inhibited by knockdown of TET1 siRNA or DEK siRNA. Conversely, delivery of intrathecal miR-489-3p-mimic into SNL rats attenuated allodynia behavior and reversed protein expression coupled to the promoter segments in the dorsal horn. Thus, a spinal miR-489-3p/DEK/TET1 transcriptional axis may contribute to neuropathic allodynia. These results may provide a new target for treating neuropathic allodynia.
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Affiliation(s)
- Cheng-Yuan Lai
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan
| | - Ming-Chun Hsieh
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan
| | - Chou-Ming Yeh
- Division of Thoracic Surgery, Department of Health, Taichung Hospital, Executive Yuan, Taichung, Taiwan
| | - Po-Sheng Yang
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan; Department of Surgery, Mackay Memorial Hospital, Taipei, Taiwan
| | - Jen-Kun Cheng
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan; Department of Anesthesiology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Hsueh-Hsiao Wang
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan
| | - Kuan-Hung Lin
- Institute of Biomedical Sciences, MacKay Medical College, New Taipei City, Taiwan; Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Siao-Tong Nie
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan
| | - Tzer-Bin Lin
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Cell Physiology and Molecular Image Research Center, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan; Department of Biotechnology, College of Medical and Health Science, Asia University, Taichung, Taiwan
| | - Hsien-Yu Peng
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan.
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Gada Y, Pandey A, Jadhav N, Ajgaonkar S, Mehta D, Nair S. New Vistas in microRNA Regulatory Interactome in Neuropathic Pain. Front Pharmacol 2022; 12:778014. [PMID: 35280258 PMCID: PMC8914318 DOI: 10.3389/fphar.2021.778014] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 12/10/2021] [Indexed: 12/11/2022] Open
Abstract
Neuropathic pain is a chronic pain condition seen in patients with diabetic neuropathy, cancer chemotherapy-induced neuropathy, idiopathic neuropathy as well as other diseases affecting the nervous system. Only a small percentage of people with neuropathic pain benefit from current medications. The complexity of the disease, poor identification/lack of diagnostic and prognostic markers limit current strategies for the management of neuropathic pain. Multiple genes and pathways involved in human diseases can be regulated by microRNA (miRNA) which are small non-coding RNA. Several miRNAs are found to be dysregulated in neuropathic pain. These miRNAs regulate expression of various genes associated with neuroinflammation and pain, thus, regulating neuropathic pain. Some of these key players include adenylate cyclase (Ac9), toll-like receptor 8 (Tlr8), suppressor of cytokine signaling 3 (Socs3), signal transducer and activator of transcription 3 (Stat3) and RAS p21 protein activator 1 (Rasa1). With advancements in high-throughput technology and better computational power available for research in present-day pharmacology, biomarker discovery has entered a very exciting phase. We dissect the architecture of miRNA biological networks encompassing both human and rodent microRNAs involved in the development of neuropathic pain. We delineate various microRNAs, and their targets, that may likely serve as potential biomarkers for diagnosis, prognosis, and therapeutic intervention in neuropathic pain. miRNAs mediate their effects in neuropathic pain by signal transduction through IRAK/TRAF6, TLR4/NF-κB, TXIP/NLRP3 inflammasome, MAP Kinase, TGFβ and TLR5 signaling pathways. Taken together, the elucidation of the landscape of signature miRNA regulatory networks in neuropathic pain will facilitate the discovery of novel miRNA/target biomarkers for more effective management of neuropathic pain.
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He L, Cao J, Jiang BC, Yang JJ, Tao YX, Ai Y. C/EBPβ Participates in Nerve Trauma-Induced TLR7 Upregulation in Primary Sensory Neurons. Mol Neurobiol 2022; 59:2629-2641. [PMID: 35141864 PMCID: PMC9016012 DOI: 10.1007/s12035-022-02763-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 01/28/2022] [Indexed: 10/26/2022]
Abstract
Nerve trauma-induced toll-like receptor 7 (TLR7) expression level increases in primary sensory neurons in injured dorsal root ganglion (DRG) avails to neuropathic pain, but the reason is still unknown. In the current study, we showed that unilateral lumbar 4 (L4) spinal nerve ligation (SNL) upregulated CCAAT/enhancer-binding protein-β (C/EBPβ) expression in ipsilateral L4 DRG. Preventing this elevation attenuated the SNL-induced upregulation of TLR7 in the ipsilateral L4 DRG and inhibited cold/thermal hyperalgesia and mechanical allodynia. In injected DRG, mimicking nerve trauma-induced C/EBPβ upregulation increased TLR7 levels, augmented responses to cold/thermal/mechanical stimuli, and caused ipsilateral spontaneous pain with no SNL. Mechanistically, SNL upregulated binding of increased C/EBPβ to Tlr7 promoter in ipsilateral L4 DRG. Accorded that C/EBPβ could trigger the activation of Tlr7 promoter and co-expressed with Tlr7 mRNA in individual DRG neurons, our findings strongly suggest the role of C/EBPβ in nerve trauma-mediated TLR7 upregulation in injured primary sensory neurons.
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Affiliation(s)
- Long He
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Jing Cao
- Department of Anatomy, College of Basic Medicine, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Bao-Chun Jiang
- Institute of Pain Medicine and Special Environmental Medicine, Nantong University, Nantong, 226019, Jiangsu, China
| | - Jian-Jun Yang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, 07103, USA
| | - Yanqiu Ai
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China.
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D'Agnelli S, Amodeo G, Franchi S, Verduci B, Baciarello M, Panerai AE, Bignami EG, Sacerdote P. Frailty and pain, human studies and animal models. Ageing Res Rev 2022; 73:101515. [PMID: 34813977 DOI: 10.1016/j.arr.2021.101515] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 11/08/2021] [Accepted: 11/11/2021] [Indexed: 11/01/2022]
Abstract
The hypothesis that pain can predispose to frailty development has been recently investigated in several clinical studies suggesting that frailty and pain may share some mechanisms. Both pain and frailty represent important clinical and social problems and both lack a successful treatment. This circumstance is mainly due to the absence of in-depth knowledge of their pathological mechanisms. Evidence of shared pathways between frailty and pain are preliminary. Indeed, many clinical studies are observational and the impact of pain treatment, and relative pain-relief, on frailty onset and progression has never been investigated. Furthermore, preclinical research on this topic has yet to be performed. Specific researches on the pain-frailty relation are needed. In this narrative review, we will attempt to point out the most relevant findings present in both clinical and preclinical literature on the topic, with particular attention to genetics, epigenetics and inflammation, in order to underline the existing gaps and the potential future interventional strategies. The use of pain and frailty animal models discussed in this review might contribute to research in this area.
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Li X, Tao YX. Intrathecal administration of the fat-mass and obesity-associated protein inhibitor mitigates neuropathic pain in female rats. TRANSLATIONAL PERIOPERATIVE AND PAIN MEDICINE 2022; 9:478-487. [PMID: 36545239 PMCID: PMC9764434 DOI: 10.31480/2330-4871/163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Several intracellular signals are involved in the sexual dimorphism of chronic pain. Our previous studies demonstrated that the fat-mass and obesity-associated protein (FTO), a demethylase of RNA N6-methyladenosine, in the injured dorsal root ganglion (DRG) contributed to the development and maintenance of nerve injury-induced nociceptive hypersensitivity in male rats and male mice. However, whether these effects of DRG FTO are in a sex-dependent manner is still unknown. The present study sought to investigate the effect of intrathecal administration of a specific FTO inhibitor, meclofenamic acid (MA), on chronic constriction injury (CCI)-induced nociceptive hypersensitivity in female rats. Intrathecal injection of MA attenuated the CCI-induced mechanical allodynia, heat hyperalgesia, and cold hyperalgesia in both the induction and maintenance periods, without changing acute/basal pain and locomotor function, in female rats. Intrathecal MA also blocked the CCI-induced hyperactivations of neurons and astrocytes in the ipsilateral L4 and L5 dorsal horns of female rats. Mechanistically, intrathecal MA prevented the CCI-induced increase in the histone methyltransferase G9a expression and reversed the G9a-controlled downregulation of mu-opioid receptor and Kv1.2 proteins in the ipsilateral L4 and L5 DRGs of female rats. These findings indicate that the effects of the FTO inhibitor on nerve injury-induced nociceptive hypersensitivity in female rats are similar to those in male rats reported previously. Our data also further confirm the role of DRG FTO in neuropathic pain and suggest potential clinical application of the FTO inhibitors for the prevention and treatment of this disorder in both men and women.
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Affiliation(s)
- Xiang Li
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA,Department of Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ07103, USA,Departments of Cell Biology & Molecular Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, USA
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Abstract
Neuropathic pain (NP) is a common symptom in many diseases of the somatosensory
nervous system, which severely affects the patient’s quality of life.
Epigenetics are heritable alterations in gene expression that do not cause
permanent changes in the DNA sequence. Epigenetic modifications can affect gene
expression and function and can also mediate crosstalk between genes and the
environment. Increasing evidence shows that epigenetic modifications, including
DNA methylation, histone modification, non-coding RNA, and RNA modification, are
involved in the development and maintenance of NP. In this review, we focus on
the current knowledge of epigenetic modifications in the development and
maintenance of NP. Then, we illustrate different facets of epigenetic
modifications that regulate gene expression and their crosstalk. Finally, we
discuss the burgeoning evidence supporting the potential of emerging epigenetic
therapies, which has been valuable in understanding mechanisms and offers novel
and potent targets for NP therapy.
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Affiliation(s)
- Danzhi Luo
- Department of Anesthesiology, The First People’s Hospital of
Foshan, Foshan, China
- Sun Yet-Sen Memorial Hospital of Sun
Yet-Sen University, Guangzhou, China
| | - Xiaohong Li
- Department of Anesthesiology, The First People’s Hospital of
Foshan, Foshan, China
| | - Simin Tang
- Department of Anesthesiology, The Third Affiliated Hospital of
Southern Medical University, Guangzhou, China
| | - Fuhu Song
- Department of Anesthesiology, The Third Affiliated Hospital of
Southern Medical University, Guangzhou, China
| | - Wenjun Li
- Department of Anesthesiology, The Third Affiliated Hospital of
Southern Medical University, Guangzhou, China
| | - Guiling Xie
- Department of Anesthesiology, The Third Affiliated Hospital of
Southern Medical University, Guangzhou, China
| | - Jinshu Liang
- Department of Anesthesiology, The Third Affiliated Hospital of
Southern Medical University, Guangzhou, China
| | - Jun Zhou
- Department of Anesthesiology, The Third Affiliated Hospital of
Southern Medical University, Guangzhou, China
- Jun Zhou, Department of Anesthesiology, The
Third Affiliated Hospital of Southern Medical University, Guangzhou 510630,
China.
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Janssen LP, Medeiros LF, Souza ADE, Silva JDA. Fibromyalgia: A Review of Related Polymorphisms and Clinical Relevance. AN ACAD BRAS CIENC 2021; 93:e20210618. [PMID: 34730627 DOI: 10.1590/0001-3765202120210618] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 07/15/2021] [Indexed: 11/21/2022] Open
Abstract
Fibromyalgia (FM) is a chronic pain syndrome that affects the central nervous system and generates disability, which is characterized by generalized pain, fatigue, and functional decline. In this review, we aimed to identify the polymorphisms related to the pathophysiology of FM and the clinical characteristics generated by genetic influence. Only original studies with genes related to FM were considered, totaling 27 articles. The genes found were: MTHFR, RGS4, MYT1L, TACR1, SCN9A, DRD3, ADRB2, IL-4, HLA-DRB1, EDN1, CNR1, TAAR1, OPRM1, ADRA1A, ADRB3, BDNF, GRIA4, HTR3A, HTR3B, HTR2A, SERPINA 1 or A1AT, NRXN3, GCH1, MEFV, TRPV3, SLC6A4, ACE I/D, TSPO, COMT, and MAOA. Several genes related to different pain syndromes and altered pain thresholds have been identified and some polymorphisms were related to susceptibility to FM. It was observed that 73.33% of the genes related to FM were also associated with some psychological disorders, such as anxiety, depression, schizophrenia, and obsessive and compulsive disorder, and 40.00% with pain sensitivity and/or migraine, besides other disorders associated (drug addiction, autoimmune disorders, circulatory problems, and metabolic alterations). This review demonstrated an association of FM and genetic polymorphisms that can expand our knowledge about the pathophysiology of this disease.
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Affiliation(s)
- Luísa P Janssen
- Lutheran University of Brazil (ULBRA), Av. Farroupilha 8001, São José, 92425-900 Canoas, RS, Brazil.,Universidade do Vale do Rio dos Sinos (UNISINOS), Av. Unisinos 950, Cristo Rei, 93022-750 São Leopoldo, RS, Brazil
| | - Liciane F Medeiros
- La Salle University (UniLaSalle), Av. Victor Barreto 2288, Centro, 92010-000 Canoas, RS, Brazil
| | - Andressa DE Souza
- La Salle University (UniLaSalle), Av. Victor Barreto 2288, Centro, 92010-000 Canoas, RS, Brazil
| | - Juliana DA Silva
- Lutheran University of Brazil (ULBRA), Av. Farroupilha 8001, São José, 92425-900 Canoas, RS, Brazil.,La Salle University (UniLaSalle), Av. Victor Barreto 2288, Centro, 92010-000 Canoas, RS, Brazil
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Exercise attenuates low back pain and alters epigenetic regulation in intervertebral discs in a mouse model. Spine J 2021; 21:1938-1949. [PMID: 34116218 DOI: 10.1016/j.spinee.2021.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 04/23/2021] [Accepted: 06/01/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Chronic low back pain (LBP) is a multifactorial disorder with complex underlying mechanisms, including associations with intervertebral disc (IVD) degeneration in some individuals. It has been demonstrated that epigenetic processes are involved in the pathology of IVD degeneration. Epigenetics refers to several mechanisms, including DNA methylation, that have the ability to change gene expression without inducing any change in the underlying DNA sequence. DNA methylation can alter the entire state of a tissue for an extended period of time and thus could potentially be harnessed for long-term pain relief. Lifestyle factors, such as physical activity, have a strong influence on epigenetic regulation. Exercise is a commonly prescribed treatment for chronic LBP, and sex-specific epigenetic adaptations in response to endurance exercise have been reported. However, whether exercise interventions that attenuate LBP are associated with epigenetic alterations in degenerating IVDs has not been evaluated. PURPOSE We hypothesize that the therapeutic efficacy of physical activity is mediated, at least in part, at the epigenetic level. The purpose of this study was to use the SPARC-null mouse model of LBP associated with IVD degeneration to clarify (1) if IVD degeneration is associated with altered expression of epigenetic regulatory genes in the IVDs, (2) if epigenetic regulatory machinery is sensitive to therapeutic environmental intervention, and (3) if there are sex-specific differences in (1) and/or (2). STUDY DESIGN Eight-month-old male and female SPARC-null and age-matched control (WT) mice (n=108) were assigned to exercise (n=56) or sedentary (n=52) groups. Deletion of SPARC is associated with progressive IVD degeneration and behavioral signs of LBP. The exercise group received a circular plastic home cage running wheel on which they could run freely. The sedentary group received an identical wheel secured in place to prevent rotation. After 6 months, the results obtained in each group were compared. METHODS After 6 months of exercise, LBP-related behavioral indices were determined, and global DNA methylation (5-methylcytosine) and epigenetic regulatory gene mRNA expression in IVDs were assessed. This project was supported by the Canadian Institutes for Health Research. The authors have no conflicts of interest. RESULTS Lumbar IVDs from WT sedentary and SPARC-null sedentary mice had similar levels of global DNA methylation (%5-mC) and comparable mRNA expression of epigenetic regulatory genes (Dnmt1,3a,b, Mecp2, Mbd2a,b, Tet1-3) in both sexes. Exercise attenuated LBP-related behaviors, decreased global DNA methylation in both WT (p<.05) and SPARC-null mice (p<.01) and reduced mRNA expression of Mecp2 in SPARC-null mice (p<.05). Sex-specific effects of exercise on expression of mRNA were also observed. CONCLUSIONS Exercise alleviates LBP in a mouse model. This may be mediated, in part, by changes in the epigenetic regulatory machinery in degenerating IVDs. Epigenetic alterations due to a lifestyle change could have a long-lasting therapeutic impact by changing tissue homeostasis in IVDs. CLINICAL SIGNIFICANCE This study confirmed the therapeutic benefits of exercise on LBP and suggests that exercise results in sex-specific alterations in epigenetic regulation in IVDs. Elucidating the effects of exercise on epigenetic regulation may enable the discovery of novel gene targets or new strategies to improve the treatment of chronic LBP.
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Li L, Bai L, Yang K, Zhang J, Gao Y, Jiang M, Yang Y, Zhang X, Wang L, Wang X, Qiao Y, Xu JT. KDM6B epigenetically regulated-interleukin-6 expression in the dorsal root ganglia and spinal dorsal horn contributes to the development and maintenance of neuropathic pain following peripheral nerve injury in male rats. Brain Behav Immun 2021; 98:265-282. [PMID: 34464689 DOI: 10.1016/j.bbi.2021.08.231] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 08/17/2021] [Accepted: 08/21/2021] [Indexed: 12/20/2022] Open
Abstract
The lysine specific demethylase 6B (KDM6B) has been implicated as a coregulator in the expression of proinflammatory mediators, and in the pathogenesis of inflammatory and arthritic pain. However, the role of KDM6B in neuropathic pain has yet to be studied. In the current study, the neuropathic pain was determined by assessing the paw withdrawal threshold (PWT) and paw withdrawal latency (PWL) following lumbar 5 spinal nerve ligation (SNL) in male rats. Immunohistochemistry, Western blotting, qRT-PCR, and chromatin immunoprecipitation (ChIP)-PCR assays were performed to investigate the underlying mechanisms. Our results showed that SNL led to a significant increase in KDM6B mRNA and protein in the ipsilateral L4/5 dorsal root ganglia (DRG) and spinal dorsal horn; and this increase correlated a markedly reduction in the level of H3K27me3 methylation in the same tissue. Double immunofluorescence staining revealed that the KDM6B expressed in myelinated A- and unmyelinated C-fibers in the DRG; and located in neuronal cells, astrocytes, and microglia in the dorsal horn. Behavioral data showed that SNL-induced mechanical allodynia and thermal hyperalgesia were impaired by the treatment of prior to i.t. injection of GSK-J4, a specific inhibitor of KDM6B, or KDM6B siRNA. Both microinjection of AAV2-EGFP-KDM6B shRNA in the lumbar 5 dorsal horn and sciatic nerve, separately, alleviated the neuropathic pain following SNL. The established neuropathic pain was also partially attenuated by repeat i.t. injections of GSK-J4 or KDM6B siRNA, started on day 7 after SNL. SNL also resulted in a remarkable increased expression of interleukin-6 (IL-6) in the DRG and dorsal horn. But this increase was dramatically inhibited by i.t. injection of GSK-J4 and KDM6B siRNA; and suppressed by prior to microinjection of AAV2-EGFP-KDM6B shRNA in the dorsal horn and sciatic nerve. Results of ChIP-PCR assay showed that SNL-induced enhanced binding of STAT3 with IL-6 promoter was inhibited by prior to i.t. injection of GSK-J4. Meanwhile, the level of H3K27me3 methylation was also decreased by the treatment. Together, our results indicate that SNL-induced upregulation of KDM6B via demethylating H3K27me3 facilitates the binding of STAT3 with IL-6 promoter, and subsequently mediated-increase in the expression of IL-6 in the DRG and dorsal horn contributes to the development and maintenance of neuropathic pain. Targeting KDM6B might a promising therapeutic strategy to treatment of chronic pain.
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Affiliation(s)
- Liren Li
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Liying Bai
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China; Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital, Zhengzhou University, 1 Jianshe East Road, Zhengzhou 450052, China
| | - Kangli Yang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China; Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital, Zhengzhou University, 1 Jianshe East Road, Zhengzhou 450052, China
| | - Jian Zhang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Yan Gao
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China; Neuroscience Research Institute, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Mingjun Jiang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Yin Yang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Xuan Zhang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Li Wang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Xueli Wang
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Yiming Qiao
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Ji-Tian Xu
- Department of Physiology and Neurobiology, School of Basic Medical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China; Neuroscience Research Institute, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China.
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Yeo M, Chen Y, Jiang C, Chen G, Wang K, Chandra S, Bortsov A, Lioudyno M, Zeng Q, Wang P, Wang Z, Busciglio J, Ji RR, Liedtke W. Repurposing cancer drugs identifies kenpaullone which ameliorates pathologic pain in preclinical models via normalization of inhibitory neurotransmission. Nat Commun 2021; 12:6208. [PMID: 34707084 PMCID: PMC8551327 DOI: 10.1038/s41467-021-26270-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 09/24/2021] [Indexed: 11/13/2022] Open
Abstract
Inhibitory GABA-ergic neurotransmission is fundamental for the adult vertebrate central nervous system and requires low chloride concentration in neurons, maintained by KCC2, a neuroprotective ion transporter that extrudes intracellular neuronal chloride. To identify Kcc2 gene expression‑enhancing compounds, we screened 1057 cell growth-regulating compounds in cultured primary cortical neurons. We identified kenpaullone (KP), which enhanced Kcc2/KCC2 expression and function in cultured rodent and human neurons by inhibiting GSK3ß. KP effectively reduced pathologic pain-like behavior in mouse models of nerve injury and bone cancer. In a nerve-injury pain model, KP restored Kcc2 expression and GABA-evoked chloride reversal potential in the spinal cord dorsal horn. Delta-catenin, a phosphorylation-target of GSK3ß in neurons, activated the Kcc2 promoter via KAISO transcription factor. Transient spinal over-expression of delta-catenin mimicked KP analgesia. Our findings of a newly repurposed compound and a novel, genetically-encoded mechanism that each enhance Kcc2 gene expression enable us to re-normalize disrupted inhibitory neurotransmission through genetic re-programming.
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Affiliation(s)
- Michele Yeo
- Department of Neurology, Duke University Medical Center, Durham, NC, USA.
| | - Yong Chen
- Department of Neurology, Duke University Medical Center, Durham, NC, USA.
| | - Changyu Jiang
- Department of Anesthesiology (Center for Translational Pain Medicine), Duke University Medical Center, Durham, NC, USA
| | - Gang Chen
- Department of Anesthesiology (Center for Translational Pain Medicine), Duke University Medical Center, Durham, NC, USA
| | - Kaiyuan Wang
- Department of Anesthesiology (Center for Translational Pain Medicine), Duke University Medical Center, Durham, NC, USA
| | - Sharat Chandra
- Department of Anesthesiology (Center for Translational Pain Medicine), Duke University Medical Center, Durham, NC, USA
| | - Andrey Bortsov
- Department of Anesthesiology (Center for Translational Pain Medicine), Duke University Medical Center, Durham, NC, USA
| | - Maria Lioudyno
- Department of Neurobiology & Behavior, Institute for Memory Impairments and Neurological Disorders (iMIND), Center for the Neurobiology of Learning and Memory, University of California at Irvine, Irvine, CA, USA
| | - Qian Zeng
- Department of Neurology, Duke University Medical Center, Durham, NC, USA
| | - Peng Wang
- Department of Neurology, Duke University Medical Center, Durham, NC, USA
| | - Zilong Wang
- Department of Neurology, Duke University Medical Center, Durham, NC, USA
- Department of Anesthesiology (Center for Translational Pain Medicine), Duke University Medical Center, Durham, NC, USA
| | - Jorge Busciglio
- Department of Neurobiology & Behavior, Institute for Memory Impairments and Neurological Disorders (iMIND), Center for the Neurobiology of Learning and Memory, University of California at Irvine, Irvine, CA, USA
| | - Ru-Rong Ji
- Department of Anesthesiology (Center for Translational Pain Medicine), Duke University Medical Center, Durham, NC, USA.
- Department of Neurobiology, Duke University Medical Center, Durham, NC, USA.
| | - Wolfgang Liedtke
- Department of Neurology, Duke University Medical Center, Durham, NC, USA.
- Department of Anesthesiology (Center for Translational Pain Medicine), Duke University Medical Center, Durham, NC, USA.
- Department of Neurobiology, Duke University Medical Center, Durham, NC, USA.
- Duke Neurology Clinics for Headache, Head-Pain and Trigeminal Sensory Disorders, Duke University Medical Center, Durham, NC, USA.
- Duke Anesthesiology Clinics for Innovative Pain Therapy, Duke University Medical Center, Durham, NC, USA.
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Caputi FF, Carboni L, Rullo L, Alessandrini I, Balzani E, Melotti RM, Romualdi P, Candeletti S, Fanelli A. An Exploratory Pilot Study of Changes in Global DNA Methylation in Patients Undergoing Major Breast Surgery Under Opioid-Based General Anesthesia. Front Pharmacol 2021; 12:733577. [PMID: 34621169 PMCID: PMC8491974 DOI: 10.3389/fphar.2021.733577] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 09/06/2021] [Indexed: 12/30/2022] Open
Abstract
This study aimed to investigate DNA methylation levels in patients undergoing major breast surgery under opioid-based general anesthesia. Blood samples were collected from eleven enrolled patients, before, during and after anesthesia. PBMC were isolated and global DNA methylation levels as well as DNA methyltransferase (DNMT) and cytokine gene expression were assessed. DNA methylation levels significantly declined by 26%, reversing the direction after the end of surgery. Likewise, DNMT1a mRNA expression was significantly reduced at all time points, with lowest level of −68%. DNMT3a and DNMT3b decreased by 65 and 71%, respectively. Inflammatory cytokines IL6 and TNFα mRNA levels showed a trend for increased expression at early time-points to end with a significant decrease at 48 h after surgery. This exploratory study revealed for the first time intraoperative global DNA hypomethylation in patients undergoing major breast surgery under general anesthesia with fentanyl. The alterations of global DNA methylation here observed seem to be in agreement with DNMTs gene expression changes. Furthermore, based on perioperative variations of IL6 and TNFα gene expression, we hypothesize that DNA hypomethylation may occur as a response to surgical stress rather than to opiate exposure.
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Affiliation(s)
- Francesca Felicia Caputi
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Lucia Carboni
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Laura Rullo
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Irene Alessandrini
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Eleonora Balzani
- Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Rita Maria Melotti
- Department of Surgical and Medical Sciences, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Patrizia Romualdi
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Sanzio Candeletti
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum-University of Bologna, Bologna, Italy
| | - Andrea Fanelli
- Anesthesiology and Pain Therapy Unit, AOSP S.Orsola Hospital, Bologna, Italy
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46
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Eller OC, Glidden N, Knight B, McKearney N, Perry M, Bernier Carney KM, Starkweather A, Young EE, Baumbauer KM. A Role for Global DNA Methylation Level and IL2 Expression in the Transition From Acute to Chronic Low Back Pain. FRONTIERS IN PAIN RESEARCH 2021; 2:744148. [PMID: 35295525 PMCID: PMC8915771 DOI: 10.3389/fpain.2021.744148] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 08/30/2021] [Indexed: 11/13/2022] Open
Abstract
Objectives: The transition from acute low back pain (aLBP) to chronic LBP (cLBP) results from a variety of factors, including epigenetic modifications of DNA. The aim of this study was to (1) compare global DNA (gDNA) methylation and histone acetylation at LBP onset between the aLBP and cLBP participants, (2) compare mRNA expression of genes with known roles in the transduction, maintenance, and/or modulation of pain between the aLBP and cLBP participants, (3) compare somatosensory function and pain ratings in our participants, and (4) determine if the aforementioned measurements were associated.Methods: A total of 220 participants were recruited for this prospective observational study following recent onset of an episode of LBP. We retained 45 individuals whose gDNA was of sufficient quality for analysis. The final sample included 14 participants whose pain resolved within 6 weeks of onset (aLBP),15 participants that reported pain for 6 months (cLBP), and 16 healthy controls. Participants were subjected to quantitative sensory testing (QST), blood was drawn via venipuncture, gDNA isolated, and global DNA methylation and histone acetylation, as well as mRNA expression of 84 candidate genes, were measured.Results: Individuals that develop cLBP display multimodal somatosensory hypersensitivity relative to aLBP participants. cLBP participants also had significantly lower global DNA methylation, which was negatively correlated with interleukin-2 (IL2) mRNA expression.Discussion: cLBP is characterized by somatosensory hypersensitivity, lower global DNA methylation, and higher IL2 expression level compared to those whose pain will resolve quickly (aLBP). These results suggest potential diagnostic and therapeutic relevance for global DNA methylation and IL2 expression in the pathology underlying the transition from acute to chronic LBP.
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Affiliation(s)
- Olivia C. Eller
- Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS, United States
| | - Nicole Glidden
- Department of Genetics and Genome Sciences, UConn Health, Farmington, CT, United States
- Center for Advancement in Managing Pain, School of Nursing, University of Connecticut, Storrs, CT, United States
| | - Brittany Knight
- Department of Neuroscience, UConn Health, Farmington, CT, United States
| | - Noelle McKearney
- Department of Genetics and Genome Sciences, UConn Health, Farmington, CT, United States
- Department of Neuroscience, UConn Health, Farmington, CT, United States
| | - Mallory Perry
- Center for Advancement in Managing Pain, School of Nursing, University of Connecticut, Storrs, CT, United States
| | - Katherine M. Bernier Carney
- Center for Advancement in Managing Pain, School of Nursing, University of Connecticut, Storrs, CT, United States
| | - Angela Starkweather
- Center for Advancement in Managing Pain, School of Nursing, University of Connecticut, Storrs, CT, United States
| | - Erin E. Young
- Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS, United States
- Department of Genetics and Genome Sciences, UConn Health, Farmington, CT, United States
- Center for Advancement in Managing Pain, School of Nursing, University of Connecticut, Storrs, CT, United States
- Department of Neuroscience, UConn Health, Farmington, CT, United States
- Department of Anesthesiology, University of Kansas Medical Center, Kansas City, KS, United States
- *Correspondence: Erin E. Young
| | - Kyle M. Baumbauer
- Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS, United States
- Center for Advancement in Managing Pain, School of Nursing, University of Connecticut, Storrs, CT, United States
- Department of Neuroscience, UConn Health, Farmington, CT, United States
- Department of Anesthesiology, University of Kansas Medical Center, Kansas City, KS, United States
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English K, Barton MC. HDAC6: A Key Link Between Mitochondria and Development of Peripheral Neuropathy. Front Mol Neurosci 2021; 14:684714. [PMID: 34531721 PMCID: PMC8438325 DOI: 10.3389/fnmol.2021.684714] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 07/30/2021] [Indexed: 01/21/2023] Open
Abstract
Peripheral neuropathy, which is the result of nerve damage from lesions or disease, continues to be a major health concern due to the common manifestation of neuropathic pain. Most investigations into the development of peripheral neuropathy focus on key players such as voltage-gated ion channels or glutamate receptors. However, emerging evidence points to mitochondrial dysfunction as a major player in the development of peripheral neuropathy and resulting neuropathic pain. Mitochondrial dysfunction in neuropathy includes altered mitochondrial transport, mitochondrial metabolism, as well as mitochondrial dynamics. The mechanisms that lead to mitochondrial dysfunction in peripheral neuropathy are poorly understood, however, the Class IIb histone deacetylase (HDAC6), may play an important role in the process. HDAC6 is a key regulator in multiple mechanisms of mitochondrial dynamics and may contribute to mitochondrial dysregulation in peripheral neuropathy. Accumulating evidence shows that HDAC6 inhibition is strongly associated with alleviating peripheral neuropathy and neuropathic pain, as well as mitochondrial dysfunction, in in vivo and in vitro models of peripheral neuropathy. Thus, HDAC6 inhibitors are being investigated as potential therapies for multiple peripheral neuropathic disorders. Here, we review emerging studies and integrate recent advances in understanding the unique connection between peripheral neuropathy and mitochondrial dysfunction through HDAC6-mediated interactions.
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Affiliation(s)
- Krystal English
- UTHealth Graduate School of Biomedical Sciences, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
- UTHealth McGovern Medical School, Houston, TX, United States
| | - Michelle Craig Barton
- UTHealth Graduate School of Biomedical Sciences, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
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Chen YY, Jiang KS, Bai XH, Liu M, Lin SY, Xu T, Wei JY, Li D, Xiong YC, Xin WJ, Li ZY. ZEB1 Induces Ddr1 Promoter Hypermethylation and Contributes to the Chronic Pain in Spinal Cord in Rats Following Oxaliplatin Treatment. Neurochem Res 2021; 46:2181-2191. [PMID: 34032956 DOI: 10.1007/s11064-021-03355-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 04/22/2021] [Accepted: 05/13/2021] [Indexed: 11/27/2022]
Abstract
Application of chemotherapeutic oxaliplatin represses gene transcription through induction of DNA methylation, which may contribute to oxaliplatin-induced chronic pain. Here, Ddr1, which showed an increased methylation in the promoter, was screened from the SRA methylation database (PRJNA587622) after oxaliplatin treatment. qPCR and MeDIP assays verified that oxaliplatin treatment increased the methylation in Ddr1 promoter region and decreased the expression of DDR1 in the neurons of spinal dorsal horn. In addition, overexpression of DDR1 by intraspinal injection of AAV-hSyn-Ddr1 significantly alleviated the mechanical allodynia induced by oxaliplatin. Furthermore, we found that oxaliplatin treatment increased the expression of DNMT3b and ZEB1 in dorsal horn neurons, and promoted the interaction between DNMT3b and ZEB1. Intrathecal injection of ZEB1 siRNA inhibited the enhanced recruitment of DNMT3b and the hypermethylation in Ddr1 promoter induced by oxaliplatin. Finally, ZEB1 siRNA rescued the DDR1 downregulation and mechanical allodynia induced by oxaliplatin. In conclusion, these results suggested that the ZEB1 recruited DNMT3b to the Ddr1 promoter, which induced the DDR1 downregulation and contributed to the oxaliplatin-induced chronic pain.
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Affiliation(s)
- Yi-Ying Chen
- Sun Yat-Sen Medical School and Guangdong Province Key Laboratory of Brain Function and Disease, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Kai-Sheng Jiang
- Sun Yat-Sen Medical School and Guangdong Province Key Laboratory of Brain Function and Disease, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Xiao-Hui Bai
- Department of Anesthesiology, Sun Yat-Sen Memorial Hospital, Sun Yet-Sen University, Guangzhou, 510080, China
| | - Meng Liu
- Sun Yat-Sen Medical School and Guangdong Province Key Laboratory of Brain Function and Disease, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Su-Yan Lin
- Sun Yat-Sen Medical School and Guangdong Province Key Laboratory of Brain Function and Disease, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Ting Xu
- Sun Yat-Sen Medical School and Guangdong Province Key Laboratory of Brain Function and Disease, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Jia-You Wei
- Guangdong Provincial Key Laboratory of Biomedical Imaging, Center for Infection and Immunity, The Fifth Affiliated Hospital, Sun Yat-Sen University, Zhuhai, 519000, Guangdong, China
| | - Dai Li
- Department of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Yuan-Chang Xiong
- Department of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Wen-Jun Xin
- Sun Yat-Sen Medical School and Guangdong Province Key Laboratory of Brain Function and Disease, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Zhen-Yu Li
- Department of Emergency Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Sun Yet-Sen University, 58 Zhongshan Rd. 2, Guangzhou, 510080, China.
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Pan Z, Du S, Wang K, Guo X, Mao Q, Feng X, Huang L, Wu S, Hou B, Chang Y, Liu T, Chen T, Li H, Bachmann T, Bekker A, Hu H, Tao Y. Downregulation of a Dorsal Root Ganglion-Specifically Enriched Long Noncoding RNA is Required for Neuropathic Pain by Negatively Regulating RALY-Triggered Ehmt2 Expression. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2004515. [PMID: 34383386 PMCID: PMC8356248 DOI: 10.1002/advs.202004515] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 03/19/2021] [Indexed: 05/07/2023]
Abstract
Nerve injury-induced maladaptive changes of gene expression in dorsal root ganglion (DRG) neurons contribute to neuropathic pain. Long non-coding RNAs (lncRNAs) are emerging as key regulators of gene expression. Here, a conserved lncRNA is reported, named DRG-specifically enriched lncRNA (DS-lncRNA) for its high expression in DRG neurons. Peripheral nerve injury downregulates DS-lncRNA in injured DRG due, in part, to silencing of POU domain, class 4, transcription factor 3, a transcription factor that interacts with the DS-lncRNA gene promoter. Rescuing DS-lncRNA downregulation blocks nerve injury-induced increases in the transcriptional cofactor RALY-triggered DRG Ehmt2 mRNA and its encoding G9a protein, reverses the G9a-controlled downregulation of opioid receptors and Kcna2 in injured DRG, and attenuates nerve injury-induced pain hypersensitivities in male mice. Conversely, DS-lncRNA downregulation increases RALY-triggered Ehmt2/G9a expression and correspondingly decreases opioid receptor and Kcna2 expression in DRG, leading to neuropathic pain symptoms in male mice in the absence of nerve injury. Mechanistically, downregulated DS-lncRNA promotes more binding of increased RALY to RNA polymerase II and the Ehmt2 gene promoter and enhances Ehmt2 transcription in injured DRG. Thus, downregulation of DS-lncRNA likely contributes to neuropathic pain by negatively regulating the expression of RALY-triggered Ehmt2/G9a, a key neuropathic pain player, in DRG neurons.
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Affiliation(s)
- Zhiqiang Pan
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Shibin Du
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Kun Wang
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Xinying Guo
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Qingxiang Mao
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Xiaozhou Feng
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Lina Huang
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Shaogen Wu
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Bailing Hou
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Yun‐Juan Chang
- The Office of Advanced Research ComputingRutgersThe State University of New JerseyNewarkNJ07103USA
| | - Tong Liu
- Center for Advanced Proteomics ResearchDepartments of Biochemistry, Microbiology & Molecular GeneticsNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Tong Chen
- Center for Advanced Proteomics ResearchDepartments of Biochemistry, Microbiology & Molecular GeneticsNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Hong Li
- Center for Advanced Proteomics ResearchDepartments of Biochemistry, Microbiology & Molecular GeneticsNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Thomas Bachmann
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Alex Bekker
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
| | - Huijuan Hu
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
- Department of Physiology, Pharmacology & NeuroscienceNew Jersey Medical SchoolRutgersThe State University of New JerseyNewarkNJ07103USA
| | - Yuan‐Xiang Tao
- Department of AnesthesiologyNew Jersey Medical School, RutgersThe State University of New JerseyNewarkNJ07103USA
- Department of Physiology, Pharmacology & NeuroscienceNew Jersey Medical SchoolRutgersThe State University of New JerseyNewarkNJ07103USA
- Department of Cell Biology & Molecular MedicineNew Jersey Medical SchoolRutgersThe State University of New JerseyNewarkNJ07103USA
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50
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Zheng BX, Guo X, Albik S, Eloy J, Tao YX. Effect of Pharmacological Inhibition of Fat-Mass and Obesity-Associated Protein on Nerve Trauma-Induced Pain Hypersensitivities. Neurotherapeutics 2021; 18:1995-2007. [PMID: 33829413 PMCID: PMC8608999 DOI: 10.1007/s13311-021-01053-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/23/2021] [Indexed: 02/04/2023] Open
Abstract
Genetic knockout or knockdown of fat-mass and obesity-associated protein (FTO), a demethylase that participates in RNA N6-methyladenosine modification in injured dorsal root ganglion (DRG), has been demonstrated to alleviate nerve trauma-induced nociceptive hypersensitivities. However, these genetic strategies are still impractical in clinical neuropathic pain management. The present study sought to examine the effect of intrathecal administration of two specific FTO inhibitors, meclofenamic acid (MA) and N-CDPCB, on the development and maintenance of nociceptive hypersensitivities caused by unilateral L5 spinal nerve ligation (SNL) in rats. Intrathecal injection of either MA or N-CDPCB diminished dose-dependently the SNL-induced mechanical allodynia, heat hyperalgesia, cold hyperalgesia, and spontaneous ongoing nociceptive responses in both development and maintenance periods, without altering acute/basal pain and locomotor function. Intrathecal MA also reduced the SNL-induced neuronal and astrocyte hyperactivities in the ipsilateral L5 dorsal horn. Mechanistically, intrathecal injection of these two inhibitors blocked the SNL-induced increase in the histone methyltransferase G9a expression and rescued the G9a-controlled downregulation of mu opioid receptor and Kv1.2 proteins in the ipsilateral L5 DRG. These findings further indicate the role of DRG FTO in neuropathic pain and suggest potential clinical application of the FTO inhibitors for management of this disorder.
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Affiliation(s)
- Bi-Xin Zheng
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, 07103, USA
| | - Xinying Guo
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, 07103, USA
| | - Sfian Albik
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, 07103, USA
| | - Jean Eloy
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, 07103, USA
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, 07103, USA.
- Department of Physiology, Pharmacology & Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, 07103, USA.
- Department of Cell Biology & Molecular Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, 07103, USA.
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