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Pan Y, Zhou T, Dong X, Wu L, Wang P, Wang S, Zhang A. Urotensin II can Induce Skeletal Muscle Atrophy Associated with Upregulating Ubiquitin-Proteasome System and Inhibiting the Differentiation of Satellite Cells in CRF Mice. Calcif Tissue Int 2023; 112:603-612. [PMID: 36892588 DOI: 10.1007/s00223-023-01073-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 02/21/2023] [Indexed: 03/10/2023]
Abstract
Skeletal muscle wasting and atrophy is highly prevalent in chronic renal failure (CRF) and increases the risk of mortality. According to our previous study, we speculate that urotensin II (UII) can induce skeletal muscle atrophy by upregulating ubiquitin-proteasome system(UPS) in CRF. C2C12 mouse myoblast cells were differentiated into myotubes, and myotubes were exposed to different concentrations of UII. Myotube diameters, myosin heavy chain(MHC), p-Fxo03A, skeletal muscle-specific E3 ubiquitin ligases such as muscle RING finger 1 (MuRF1) and muscle atrophy F-box (MAFbx/atrogin1) were detected. Three animal models (the sham operation mice as normal control (NC) group, wild-type C57BL/6 mice with 5/6 nephrectomy (WT CRF) group, UII receptor gene knock out (UT KO) mice with 5/6 nephrectomy (UT KO CRF) group) were designed. Cross-sectional area (CSA) of skeletal muscle tissues in three animal models were measured, and western blot detected protein of UII, p-Fxo03A, MAFbx and MuRF1, and immunofluorescence assays explored the satellite cell marker of Myod1 and Pax7, and PCR arrays detected the muscle protein degradation genes, protein synthesis genes and the genes which were involved in muscle components. UII could decrease mouse myotube diameters, and upregulate dephosphorylated Fxo03A protein. MAFbx and MuRF1 were higher in WT CRF group than that in NC group, but after UII receptor gene was knocked out (UT KO CRF), their expressions were downregulated. UII could inhibit the expression of Myod1 but not Pax7 in animal study. We first demonstrate that skeletal muscle atrophy induced by UII associated with upregulating ubiquitin-proteasome system and inhibiting the differentiation of satellite cells in CRF mice.
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Affiliation(s)
- Yajing Pan
- Department of Nephrology, Xuan Wu Hospital, Capital Medical University, No. 45, Chang-Chun Street, Xicheng District, Beijing, People's Republic of China
| | - Ting Zhou
- Department of Nephrology, Xuan Wu Hospital, Capital Medical University, No. 45, Chang-Chun Street, Xicheng District, Beijing, People's Republic of China
| | - Xingtong Dong
- Department of Nephrology, Xuan Wu Hospital, Capital Medical University, No. 45, Chang-Chun Street, Xicheng District, Beijing, People's Republic of China
| | - Leiyun Wu
- Department of Nephrology, Xuan Wu Hospital, Capital Medical University, No. 45, Chang-Chun Street, Xicheng District, Beijing, People's Republic of China
| | - Peiwen Wang
- Department of Nephrology, Xuan Wu Hospital, Capital Medical University, No. 45, Chang-Chun Street, Xicheng District, Beijing, People's Republic of China
| | - Shiyuan Wang
- Department of Nephrology, Xuan Wu Hospital, Capital Medical University, No. 45, Chang-Chun Street, Xicheng District, Beijing, People's Republic of China
| | - Aihua Zhang
- Department of Nephrology, Xuan Wu Hospital, Capital Medical University, No. 45, Chang-Chun Street, Xicheng District, Beijing, People's Republic of China.
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2
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Zhang Y, Chen GX. Urotensin II level is elevated in inflammatory bowel disease patients. World J Gastroenterol 2022; 28:5230-5232. [PMID: 36188724 PMCID: PMC9516668 DOI: 10.3748/wjg.v28.i35.5230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/13/2022] [Accepted: 08/31/2022] [Indexed: 02/06/2023] Open
Abstract
It was reported that the urotensin II (U-II) level in inflammatory bowel disease (IBD) patients are significantly higher than in controls. To provide future guidance for the management of cardiovascular risk factors in IBD patients, the sample size of the current study appears to be limited, and more clinical samples to compare U-II levels in IBD patients and controls are needed. This will clarify the possible roles of inflammation factors and related signaling pathways (like EPK1/2, NF-κB and Rho/ROCK) in the pathophysiology of IBD. Therefore, large multicenter studies should be done to confirm the findings and underlying mechanisms in the future.
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Affiliation(s)
- Yan Zhang
- Department of Gastroenterology, Affiliated Puren Hospital of Wuhan University of Science and Technology, Wuhan 430081, Hubei Province, China
| | - Guo-Xun Chen
- Department of Nutrition, The University of Tennessee, Knoxville, TN 37996, United States
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Hisaoka-Nakashima K, Moriwaki K, Yoshimoto N, Yoshii T, Nakamura Y, Ago Y, Morioka N. Anti-interleukin-6 receptor antibody improves allodynia and cognitive impairment in mice with neuropathic pain following partial sciatic nerve ligation. Int Immunopharmacol 2022; 112:109219. [PMID: 36084541 DOI: 10.1016/j.intimp.2022.109219] [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: 07/08/2022] [Revised: 08/18/2022] [Accepted: 08/30/2022] [Indexed: 11/05/2022]
Abstract
Neuropathic pain caused by nerve injury presents with severe spontaneous pain and a range of comorbidities, including deficits in higher executive functioning, none of which are adequately treated with current analgesics. Interleukin-6 (IL-6), a proinflammatory cytokine, is critically involved in the development and maintenance of central sensitization. However, the roles of IL-6 in neuropathic pain and related comorbidities have yet to be fully clarified. The present study examined the effect of MR16-1, an anti-IL-6 receptor antibody and inhibits IL-6 activity, on allodynia and cognitive impairment in mice with neuropathic pain following partial sciatic nerve ligation (PSNL). Significant upregulation of IL-6 expression was observed in the hippocampus in PSNL mice. Intranasal administration of MR16-1 significantly improved cognitive impairment but not allodynia in PSNL mice. Intranasal MR16-1 blocked PSNL-induced degenerative effects on hippocampal neurons. Intraperitoneal administration of MR16-1 suppressed allodynia but not cognitive impairment of PSNL mice. The findings suggest that cognitive impairment associated with neuropathic pain is mediated through changes in hippocampus induced by IL-6. These data also suggest that IL-6 mediated peripheral inflammation underlies allodynia, and IL-6 mediated inflammation in the central nervous system underlies cognitive impairment associated with neuropathic pain, and further suggest the therapeutic potential of blocking IL-6 functioning by blocking its receptor.
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Affiliation(s)
- Kazue Hisaoka-Nakashima
- Department of Pharmacology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, Japan
| | - Kodai Moriwaki
- Department of Pharmacology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, Japan
| | - Natsuki Yoshimoto
- Department of Pharmacology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, Japan
| | - Toshiki Yoshii
- Department of Pharmacology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, Japan
| | - Yoki Nakamura
- Department of Pharmacology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, Japan
| | - Yukio Ago
- Department of Cellular and Molecular Pharmacology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, Japan
| | - Norimitsu Morioka
- Department of Pharmacology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, Japan.
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Liu Q, Lu QD, Sun BS, Zhao J, He F, Zhu JZ. Inhibition of U-II/UT signaling ameliorates cystitis-associated bladder hyperactivity by targeting the RhoA/Rho-kinase pathway. Kaohsiung J Med Sci 2022; 38:879-888. [PMID: 35766129 DOI: 10.1002/kjm2.12569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 05/01/2022] [Accepted: 05/26/2022] [Indexed: 11/06/2022] Open
Abstract
Urotensin II (U-II) and its receptor (UT) are involved in the pathogenesis of various diseases; however, their association with the development of cystitis has not been elucidated. The present study was designed to investigate the functional role of U-II/UT signaling in cyclophosphamide (CYP)-induced cystitis. A total of 60 female rats were randomly divided into the control and CYP-treated groups. Intraperitoneal injection of CYP successfully induced cystitis in rats of the CYP-treated group. The protein and mRNA expression levels of U-II and UT were significantly enhanced in rat bladder tissues of the CYP-treated group. Furthermore, the results of the immunofluorescence staining analysis demonstrated that CYP treatment apparently increased the expression levels of UT in the urothelium layer, detrusor smooth muscle, and bladder interstitial Cajal-like cells. The selective antagonist of UT, SB657510 (10 μm), significantly suppressed the CYP-induced increase in the spontaneous contractions of muscle strips and ameliorated the bladder hyperactivity of CYP-treated rats. Moreover, CYP treatment significantly increased the protein expression levels of Ras homolog family member (Rho) A and Rho-associated protein kinase 2 in rat bladder tissues. Following pretreatment with the Rho-kinase inhibitor Y-27632 (10 μm), the inhibitory effects of SB657510 (10 μm) on the spontaneous contractions of muscle strips were eliminated. In conclusion, the results of the present study suggested that activation of U-II/UT signaling promoted the development of cystitis-associated-bladder hyperactivity by targeting the RhoA/Rho-kinase pathway, indicating that the U-II/UT signaling could serve as a novel target for the treatment of interstitial cystitis/bladder pain syndrome.
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Affiliation(s)
- Qian Liu
- Clinical Medicine Postdoctoral Research Station, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Department of Urology, The General Hospital of Western Theater Command, Chengdu, China
| | - Qu-Dong Lu
- Department of Urology, Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Bi-Shao Sun
- Department of Urology, Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Jiang Zhao
- Department of Urology, Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Fan He
- Department of Urology, Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Jing-Zhen Zhu
- Department of Urology, Second Affiliated Hospital, Army Medical University, Chongqing, China
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Kokotović T, Lenartowicz EM, Langeslag M, Ciotu CI, Fell CW, Scaramuzza A, Fischer MJM, Kress M, Penninger JM, Nagy V. Transcription factor mesenchyme homeobox protein 2 (MEOX2) modulates nociceptor function. FEBS J 2022; 289:3457-3476. [PMID: 35029322 PMCID: PMC9306780 DOI: 10.1111/febs.16347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/30/2021] [Accepted: 01/10/2022] [Indexed: 12/18/2022]
Abstract
Mesenchyme homeobox protein 2 (MEOX2) is a transcription factor involved in mesoderm differentiation, including development of bones, muscles, vasculature and dermatomes. We have previously identified dysregulation of MEOX2 in fibroblasts from Congenital Insensitivity to Pain patients, and confirmed that btn, the Drosophila homologue of MEOX2, plays a role in nocifensive responses to noxious heat stimuli. To determine the importance of MEOX2 in the mammalian peripheral nervous system, we used a Meox2 heterozygous (Meox2+/−) mouse model to characterise its function in the sensory nervous system, and more specifically, in nociception. MEOX2 is expressed in the mouse dorsal root ganglia (DRG) and spinal cord, and localises in the nuclei of a subset of sensory neurons. Functional studies of the mouse model, including behavioural, cellular and electrophysiological analyses, showed altered nociception encompassing impaired action potential initiation upon depolarisation. Mechanistically, we noted decreased expression of Scn9a and Scn11a genes encoding Nav1.7 and Nav1.9 voltage‐gated sodium channels respectively, that are crucial in subthreshold amplification and action potential initiation in nociceptors. Further transcriptomic analyses of Meox2+/− DRG revealed downregulation of a specific subset of genes including those previously associated with pain perception, such as PENK and NPY. Based on these observations, we propose a novel role of MEOX2 in primary afferent nociceptor neurons for the maintenance of a transcriptional programme required for proper perception of acute and inflammatory noxious stimuli.
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Affiliation(s)
- Tomislav Kokotović
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases Vienna Austria
- CeMM‐Research Center for Molecular Medicine of the Austrian Academy of Sciences Vienna Austria
- Department of Neurology Medical University of Vienna Austria
| | | | - Michiel Langeslag
- Department of Physiology and Medical Physics Institute of Physiology Medical University of Innsbruck Austria
- Institute of Pharmacy and Center for Molecular Biosciences Innsbruck (CMBI) University of Innsbruck Austria
- Department of Pharmacology Medical University of Innsbruck Austria
| | - Cosmin I. Ciotu
- Institute of Physiology Medical University of Vienna Austria
| | - Christopher W. Fell
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases Vienna Austria
- CeMM‐Research Center for Molecular Medicine of the Austrian Academy of Sciences Vienna Austria
- Department of Neurology Medical University of Vienna Austria
| | - Angelica Scaramuzza
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases Vienna Austria
| | | | - Michaela Kress
- Department of Physiology and Medical Physics Institute of Physiology Medical University of Innsbruck Austria
| | - Josef M. Penninger
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences VBC – Vienna BioCenter Campus Vienna Austria
- Department of Medical Genetics Life Science Institute University of British Columbia Vancouver Canada
| | - Vanja Nagy
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases Vienna Austria
- CeMM‐Research Center for Molecular Medicine of the Austrian Academy of Sciences Vienna Austria
- Department of Neurology Medical University of Vienna Austria
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Xue S, Cao ZX, Wang JN, Zhao QX, Han J, Yang WJ, Sun T. Receptor-Interacting Protein Kinase 3 Inhibition Relieves Mechanical Allodynia and Suppresses NLRP3 Inflammasome and NF-κB in a Rat Model of Spinal Cord Injury. Front Mol Neurosci 2022; 15:861312. [PMID: 35514432 PMCID: PMC9063406 DOI: 10.3389/fnmol.2022.861312] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 03/14/2022] [Indexed: 12/19/2022] Open
Abstract
Background Neuroinflammation is critical in developing and maintaining neuropathic pain after spinal cord injury (SCI). The receptor-interacting protein kinase 3 (RIPK3) has been shown to promote inflammatory response by exerting its non-necroptotic functions. In this study, we explored the involvement of RIPK3 in neuropathic pain after SCI. Methods Thoracic (T10) SCI rat model was conducted, and the mechanical threshold in rats was measured. The expressions of RIPK3, nod-like receptor family pyrin domain-containing protein 3 (NLRP3), caspase-1, and nuclear factor-κB (NF-κB) were measured with western blotting analysis or quantitative real-time polymerase chain reaction (qRT-PCR). Double immunofluorescence staining was used to explore the colabeled NLRP3 with NeuN, glial fibrillary acidic protein (GFAP), and ionized calcium-binding adapter molecule 1 (IBA1). In addition, enzyme-linked immunosorbent assay (ELISA) was applied to analyze the levels of proinflammatory factors interleukin 1 beta (IL-1β), interleukin 18 (IL-18), and tumor necrosis factor alpha (TNF-α). Results The expression of RIPK3 was elevated from postoperative days 7–21, which was consistent with the development of mechanical allodynia. Intrathecal administration of RIPK3 inhibitor GSK872 could alleviate the mechanical allodynia in SCI rats and reduce the expression levels of RIPK3. The activation of NLRP3 inflammasome and NF-κB was attenuated by GSK872 treatment. Furthermore, immunofluorescence suggested that NLRP3 had colocalization with glial cells and neurons in the L4–L6 spinal dorsal horns. In addition, GSK872 treatment reduced the production of inflammatory cytokines. Conclusion Our findings indicated that RIPK3 was an important facilitated factor for SCI-induced mechanical allodynia. RIPK3 inhibition might relieve mechanical allodynia by inhibiting NLRP3 inflammasome, NF-κB, and the associated inflammation.
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Affiliation(s)
- Song Xue
- Department of Pain Management, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Zhen-Xin Cao
- Departments of Pain Management, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Jun-Nan Wang
- Departments of Pain Management, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Qing-Xiang Zhao
- Department of Pain Management, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jie Han
- Departments of Pain Management, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Wen-Jie Yang
- Departments of Pain Management, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Tao Sun
- Department of Pain Management, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Departments of Pain Management, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
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Adrar NS, Madani K, Adrar S. Polyphenol-bradykinin interaction: Role in pain sensation. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.100935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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8
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Li H, Fan L, Zhang Y, Cao Y, Liu X. SNHG16 aggravates chronic constriction injury-induced neuropathic pain in rats via binding with miR-124-3p and miR-141-3p to upregulate JAG1. Brain Res Bull 2020; 165:228-237. [DOI: 10.1016/j.brainresbull.2020.09.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 09/25/2020] [Accepted: 09/28/2020] [Indexed: 02/07/2023]
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Li Z, Li A, Yan L, Yang T, Xu W, Fan P. Downregulation of long noncoding RNA DLEU1 attenuates hypersensitivity in chronic constriction injury-induced neuropathic pain in rats by targeting miR-133a-3p/SRPK1 axis. Mol Med 2020; 26:104. [PMID: 33167866 PMCID: PMC7653812 DOI: 10.1186/s10020-020-00235-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 10/26/2020] [Indexed: 02/06/2023] Open
Abstract
Background Neuropathic pain belongs to chronic pain and is caused by the primary dysfunction of the somatosensory nervous system. Long noncoding RNAs (lncRNAs) have been reported to regulate neuronal functions and play significant roles in neuropathic pain. DLEU1 has been indicated to have close relationship with neuropathic pain. Therefore, our study focused on the significant role of DLEU1 in neuropathic pain rat models. Methods We first constructed a chronic constrictive injury (CCI) rat model. Paw withdrawal threshold (PWT) and paw withdrawal latency (PWL) were employed to evaluate hypersensitivity in neuropathic pain. RT-qPCR was performed to analyze the expression of target genes. Enzyme-linked immunosorbent assay (ELISA) was conducted to detect the concentrations of interleukin‐6 (IL-6), tumor necrosis factor‐α (TNF-α) and IL-1β. The underlying mechanisms of DLEU1 were investigated using western blot and luciferase reporter assays. Results Our findings showed that DLEU1 was upregulated in CCI rats. DLEU1 knockdown reduced the concentrations of IL‐6, IL‐1β and TNF‐α in CCI rats, suggesting that neuroinflammation was inhibited by DLEU1 knockdown. Besides, knockdown of DLEU1 inhibited neuropathic pain behaviors. Moreover, it was confirmed that DLEU1 bound with miR-133a-3p and negatively regulated its expression. SRPK1 was the downstream target of miR-133a-3p. DLEU1 competitively bound with miR-133a-3p to upregulate SRPK1. Finally, rescue assays revealed that SRPK1 overexpression rescued the suppressive effects of silenced DLEU1 on hypersensitivity in neuropathic pain and inflammation of spinal cord in CCI rats. Conclusion DLEU1 regulated inflammation of the spinal cord and mediated hypersensitivity in neuropathic pain in CCI rats by binding with miR-133a-3p to upregulate SRPK1 expression.
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Affiliation(s)
- Zhen Li
- Department of Anesthesiology, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, 410008, Hunan, China
| | - Aiyuan Li
- Department of Anesthesiology, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, 410008, Hunan, China
| | - Liping Yan
- Department of Anesthesiology, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, 410008, Hunan, China
| | - Tian Yang
- Department of Anesthesiology, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, 410008, Hunan, China
| | - Wei Xu
- Department of Anesthesiology, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, 410008, Hunan, China
| | - Pengju Fan
- Department of Burn and Plastic Surgery, Xiangya Hospital Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China.
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Miao J, Zhou X, Ji T, Chen G. NF-κB p65-dependent transcriptional regulation of histone deacetylase 2 contributes to the chronic constriction injury-induced neuropathic pain via the microRNA-183/TXNIP/NLRP3 axis. J Neuroinflammation 2020; 17:225. [PMID: 32723328 PMCID: PMC7389436 DOI: 10.1186/s12974-020-01901-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 07/15/2020] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Neuropathic pain is related to the sustained activation of neuroglial cells and the production of proinflammatory cytokines in the spinal dorsal horn. However, the clinical efficacy of currently available treatments is very limited. The transcription factor nuclear factor κB (NF-κB) is a ubiquitously expressed protein family and considered to be crucial in autoimmunity. Thus, our study aimed to examine the influence of NF-κB p65 in chronic constriction injury (CCI)-induced neuropathic pain as well as its underlying mechanism. METHODS A rat model of neuropathic pain was established by CCI induction followed by isolation of microglial cells. The binding of NF-κB p65 to HDAC2, of miR-183 to TXNIP, and of TXNIP to NLRP3 was investigated. Expression of miR-183, NF-κB p65, HDAC2, TXNIP, and NLRP3 was determined with their functions in CCI rats and microglial cells analyzed by gain- and loss-of-function experiments. RESULTS NF-κB p65 and HDAC2 were upregulated while miR-183 was downregulated in the dorsal horn of the CCI rat spinal cord. NF-κB p65 was bound to the HDAC2 promoter and then increased its expression. HDAC2 reduced miR-183 expression by deacetylation of histone H4. Additionally, miR-183 negatively regulated TXNIP. Mechanistically, NF-κB p65 downregulated the miR-183 expression via the upregulation of HDAC2 and further induced inflammatory response by activating the TXNIP-NLRP3 inflammasome axis, thus aggravating the neuropathic pain in CCI rats and microglial cells. CONCLUSION These results revealed a novel transcriptional mechanism of interplay between NF-κB and HDAC2 focusing on neuropathic pain via the miR-183/TXNIP/NLRP3 axis.
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Affiliation(s)
- Jiamin Miao
- Department of Anesthesiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, No. 3, Qingchun East Road, Jianggan District, Hangzhou, 310012, Zhejiang Province, China.
| | - Xuelong Zhou
- Department of Anesthesiology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Tianjiao Ji
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Boston Children's Hospital, Harvard Medical School, Boston, 02115, USA
| | - Gang Chen
- Department of Anesthesiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, No. 3, Qingchun East Road, Jianggan District, Hangzhou, 310012, Zhejiang Province, China.
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Du Z, Yin S, Song X, Zhang L, Yue S, Jia X, Zhang Y. Identification of Differentially Expressed Genes and Key Pathways in the Dorsal Root Ganglion After Chronic Compression. Front Mol Neurosci 2020; 13:71. [PMID: 32431596 PMCID: PMC7214750 DOI: 10.3389/fnmol.2020.00071] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 04/14/2020] [Indexed: 12/31/2022] Open
Abstract
Neuropathic pain (NP) is caused by primary or secondary impairment of the peripheral or central nervous systems. Its etiology is complex and involves abnormal patterns of gene expression and pathway activation. Using bioinformatics analysis, we aimed to identify NP-associated changes in genes and pathways in L4 and L5 dorsal root ganglia (DRG) in a rat model of NP induced by chronic compression of the DRG (CCD). Genome-wide transcriptional analyses were used to elucidate the molecular mechanisms underlying NP. We screened differentially expressed genes (DEGs) 7 days after CCD in comparison with sham-operated controls. Quantitative real-time polymerase chain reaction (RT-qPCR) and western blotting were used to confirm the presence of key DEGs. Kyoto Encyclopedia of Genes and Genomes (KEGG)-pathway analysis of DEGs and global signal transduction network analysis of DEGs were also conducted. The CCD group developed clear mechanical and thermal allodynia in the ipsilateral hind paw compared with the sham group. This comparison identified 1,887 DEGs, with 1156 upregulated and 731 downregulated DEGs, and 123 DEG-enriched pathways. We identified the key candidate genes that might play a role in the development of NP, namely syndecan 1 (Sdc1), phosphatidylinositol-4,5-bisphosphate 3-kinase, catalytic subunit gamma (Pi3k), Janus kinase 2 (Jak2), jun proto-oncogene, AP-1 transcription factor subunit (Jun), and interleukin 6 (IL-6) by analyzing the global signal transduction network. RT-qPCR and western blot analysis confirmed the microarray results. The DEGs Sdc1, Pi3k, Jak2, Jun, and IL-6, and the cytokine signaling pathway, the neuroactive ligand-receptor interaction, the toll-like receptor signaling pathway, and the PI3K-Akt signaling pathway may have decisive modulatory roles in both nerve regeneration and NP. These results provide deeper insight into the mechanism underlying NP and promising therapeutic targets for its treatment.
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Affiliation(s)
- Zhanhui Du
- Department of Physical Medicine & Rehabilitation, Qilu Hospital, Shandong University, Jinan, China.,Heart Center, Qingdao Women and Children's Hospital, Qingdao, China
| | - Sen Yin
- Department of Neurology, Qilu Hospital, Shandong University, Jinan, China
| | - Xiuhui Song
- Department of Neurosurgery, The People's Hospital of Jimo City, Qingdao, China
| | - Lechi Zhang
- Department of Physical Medicine & Rehabilitation, Suzhou Hospital Affiliated to Nanjing Medical University, Suzhou, China
| | - Shouwei Yue
- Department of Physical Medicine & Rehabilitation, Qilu Hospital, Shandong University, Jinan, China
| | - Xiaofeng Jia
- Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD, United States.,Department of Orthopaedics, Anatomy & Neurobiology, University of Maryland School of Medicine, Baltimore, MD, United States.,Departments of Biomedical Engineering, Anesthesiology and Critical Care Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Yang Zhang
- Department of Physical Medicine & Rehabilitation, Qilu Hospital, Shandong University, Jinan, China.,Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD, United States
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Nassour H, Iddir M, Chatenet D. Towards Targeting the Urotensinergic System: Overview and Challenges. Trends Pharmacol Sci 2019; 40:725-734. [DOI: 10.1016/j.tips.2019.08.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 08/11/2019] [Accepted: 08/13/2019] [Indexed: 12/19/2022]
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Jiang Y, Wang J, Li H, Xia L. IL-35 alleviates inflammation progression in a rat model of diabetic neuropathic pain via inhibition of JNK signaling. JOURNAL OF INFLAMMATION-LONDON 2019; 16:19. [PMID: 31367192 PMCID: PMC6651949 DOI: 10.1186/s12950-019-0217-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 05/28/2019] [Indexed: 12/26/2022]
Abstract
Background Emerging evidence has demonstrated that inflammation is involved in the occurrence and development of diabetic neuropathic pain (DNP). The anti-inflammatory property of interleukin (IL)-35 makes it a promising candidate to block the pain perception. The present study was undertaken to investigate whether IL-35 could attenuate DNP in streptozotocin (STZ)-induced rat model and its potential mechanism. Methods The rat model of DNP was established by a single STZ injection followed by measurements of fasting blood glucose and insulin. Fourteen days after STZ injection, DNP rats were intrathecally injected with IL-35, c-Jun N-terminal kinase (JNK) inhibitor or activator or dimethylsulfoxide (DMSO) as vehicle control, respectively. The mechanical allodynia was assayed to evaluate the therapeutic effect of IL-35. In mechanism study, the serum and protein levels of inflammatory cytokines using ELISA and western blotting and the activation of JNK signaling were further evaluated by quantitative reverse transcription PCR (qRT-PCR). Histopathologic changes were evaluated by Nissl staining. Apoptosis was examined using TUNEL staining. Results DNP rats exhibited increased fasting blood glucose and insulin levels and reduced insulin sensitivity index (ISI). Intrathecal injection of IL-35 reduced accumulation of pro-inflammatory cytokines in the spinal cord of DNP rats. Furthermore, IL-35 displayed anti-inflammatory and anti-apoptotic effects via inhibition of JNK pathway. Conclusion IL-35 treatment mitigated DNP via downregulating JNK signaling pathway.
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Affiliation(s)
- Yinghai Jiang
- Pain Department, Henan Provincial People's Hospital, No. 7 Weiwu Road, Zhengzhou, 450003 Henan China
| | - Jing Wang
- Pain Department, Henan Provincial People's Hospital, No. 7 Weiwu Road, Zhengzhou, 450003 Henan China
| | - Haiqin Li
- Pain Department, Henan Provincial People's Hospital, No. 7 Weiwu Road, Zhengzhou, 450003 Henan China
| | - Lingjie Xia
- Pain Department, Henan Provincial People's Hospital, No. 7 Weiwu Road, Zhengzhou, 450003 Henan China
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Yu S, Zhang Y, Zhao X, Chang Z, Wei Y, Sun Y, Jiang D, Jiang X, Tao J. Cholecystokinin type B receptor-mediated inhibition of A-type K + channels enhances sensory neuronal excitability through the phosphatidylinositol 3-kinase and c-Src-dependent JNK pathway. Cell Commun Signal 2019; 17:68. [PMID: 31215470 PMCID: PMC6582535 DOI: 10.1186/s12964-019-0385-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 06/10/2019] [Indexed: 02/06/2023] Open
Abstract
Background Cholecystokinin (CCK) is implicated in the regulation of nociceptive sensitivity of primary afferent neurons. Nevertheless, the underlying cellular and molecular mechanisms remain unknown. Methods Using patch clamp recording, western blot analysis, immunofluorescent labelling, enzyme-linked immunosorbent assays, adenovirus-mediated shRNA knockdown and animal behaviour tests, we studied the effects of CCK-8 on the sensory neuronal excitability and peripheral pain sensitivity mediated by A-type K+ channels. Results CCK-8 reversibly and concentration-dependently decreased A-type K+ channel (IA) in small-sized dorsal root ganglion (DRG) neurons through the activation of CCK type B receptor (CCK-BR), while the sustained delayed rectifier K+ current was unaffected. The intracellular subunit of CCK-BR coimmunoprecipitated with Gαo. Blocking G-protein signaling with pertussis toxin or by the intracellular application of anti-Gβ antibody reversed the inhibitory effects of CCK-8. Antagonism of phosphatidylinositol 3-kinase (PI3K) but not of its common downstream target Akts abolished the CCK-BR-mediated IA response. CCK-8 application significantly activated JNK mitogen-activated protein kinase. Antagonism of either JNK or c-Src prevented the CCK-BR-mediated IA decrease, whereas c-Src inhibition attenuated the CCK-8-induced p-JNK activation. Application of CCK-8 enhanced the action potential firing rate of DRG neurons and elicited mechanical and thermal pain hypersensitivity in mice. These effects were mediated by CCK-BR and were occluded by IA blockade. Conclusion Our findings indicate that CCK-8 attenuated IA through CCK-BR that is coupled to the Gβγ-dependent PI3K and c-Src-mediated JNK pathways, thereby enhancing the sensory neuronal excitability in DRG neurons and peripheral pain sensitivity in mice.
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Affiliation(s)
- Shumin Yu
- Department of Physiology and Neurobiology & Centre for Ion Channelopathy, Medical College of Soochow University, 199 Ren-Ai Road, Suzhou, 215123, People's Republic of China
| | - Yuan Zhang
- Department of Geriatrics and Institute of Neuroscience, the Second Affiliated Hospital of Soochow University, Suzhou, 215004, People's Republic of China
| | - Xianyang Zhao
- Department of Physiology and Neurobiology & Centre for Ion Channelopathy, Medical College of Soochow University, 199 Ren-Ai Road, Suzhou, 215123, People's Republic of China
| | - Zhigang Chang
- Department of Intensive Care Unit, Beijing Hospital Ministry of Health, Beijing, 100730, People's Republic of China
| | - Yuan Wei
- Department of Physiology and Neurobiology & Centre for Ion Channelopathy, Medical College of Soochow University, 199 Ren-Ai Road, Suzhou, 215123, People's Republic of China
| | - Yufang Sun
- Department of Physiology and Neurobiology & Centre for Ion Channelopathy, Medical College of Soochow University, 199 Ren-Ai Road, Suzhou, 215123, People's Republic of China
| | - Dongsheng Jiang
- Comprehensive Pneumology Center, Helmholtz Zentrum München, 81377, Munich, Germany
| | - Xinghong Jiang
- Department of Physiology and Neurobiology & Centre for Ion Channelopathy, Medical College of Soochow University, 199 Ren-Ai Road, Suzhou, 215123, People's Republic of China
| | - Jin Tao
- Department of Physiology and Neurobiology & Centre for Ion Channelopathy, Medical College of Soochow University, 199 Ren-Ai Road, Suzhou, 215123, People's Republic of China. .,Jiangsu Key Laboratory of Neuropsychiatric Diseases, Soochow University, Suzhou, 215123, People's Republic of China.
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15
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Nishimura K, Fukuda A, Hisatake K. Mechanisms of the Metabolic Shift during Somatic Cell Reprogramming. Int J Mol Sci 2019; 20:ijms20092254. [PMID: 31067778 PMCID: PMC6539623 DOI: 10.3390/ijms20092254] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 04/25/2019] [Accepted: 05/06/2019] [Indexed: 12/18/2022] Open
Abstract
Pluripotent stem cells (PSCs), including embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs), hold a huge promise for regenerative medicine, drug development, and disease modeling. PSCs have unique metabolic features that are akin to those of cancer cells, in which glycolysis predominates to produce energy as well as building blocks for cellular components. Recent studies indicate that the unique metabolism in PSCs is not a mere consequence of their preference for a low oxygen environment, but is an active process for maintaining self-renewal and pluripotency, possibly in preparation for rapid response to the metabolic demands of differentiation. Understanding the regulatory mechanisms of this unique metabolism in PSCs is essential for proper derivation, generation, and maintenance of PSCs. In this review, we discuss the metabolic features of PSCs and describe the current understanding of the mechanisms of the metabolic shift during reprogramming from somatic cells to iPSCs, in which the metabolism switches from oxidative phosphorylation (OxPhos) to glycolysis.
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Affiliation(s)
- Ken Nishimura
- Laboratory of Gene Regulation, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8577, Japan.
| | - Aya Fukuda
- Laboratory of Gene Regulation, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8577, Japan.
| | - Koji Hisatake
- Laboratory of Gene Regulation, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8577, Japan.
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Sun J, Li Y, Li M, Liu Y, Qu C, Wang L, Song L. A novel JNK is involved in immune response by regulating IL expression in oyster Crassostrea gigas. FISH & SHELLFISH IMMUNOLOGY 2018; 79:93-101. [PMID: 29751034 DOI: 10.1016/j.fsi.2018.05.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 05/03/2018] [Accepted: 05/08/2018] [Indexed: 06/08/2023]
Abstract
The c-Jun N-terminal kinase (JNK) is a member of mitogen-activated protein kinases (MAPK) highly conserved from yeast to mammals and participates in regulating many physiological and pathological processes. In the present study, a novel JNK was identified from oyster Crassostrea gigas (designated as CgJNK) and its biological functions were investigated in response against lipopolysaccharide (LPS) stimulation. The CgJNK consists of 415 amino acids, which includes a serine/threonine protein kinase (S_TKc) domain with a conserved Thr-Pro-Tyr (TPY) motif. Phylogenetic analysis revealed that CgJNK shared high similarity with other members of the JNK subfamily. CgJNK mRNA was detected in all the tested tissues and CgJNK mRNA expression levels in hemocytes were significantly up-regulated from 6 to 72 h after LPS stimulation and reached the highest level (16.1-fold, p < 0.01) at 24 h. The phosphorylation level of CgJNK in C. gigas hemocytes was increased at 2 h after LPS stimulation. The subcellular localization of CgJNK phosphorylation in hemocytes was analyzed after LPS stimulation, and CgJNK phosphorylation could be detected in both cytoplasm and nucleus of oyster hemocytes at 2 h post LPS stimulation. Additionally, the interleukins (CgILs) were detected in hemocytes of CgJNK-knockdown oysters. CgIL17-1, CgIL17-2, CgIL17-4 and CgIL17-6 transcripts were decreased significantly in CgJNK-knockdown oysters at 24 h post LPS stimulation. In summary, these results suggested that CgJNK played an important role in the immune response of oysters by regulating IL expression.
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Affiliation(s)
- Jiejie Sun
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian 116023, China
| | - Yinan Li
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China
| | - Meijia Li
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China
| | - Yu Liu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China
| | - Chen Qu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China
| | - Lingling Wang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China; Laboratory of Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266235, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian 116023, China.
| | - Linsheng Song
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China; Laboratory of Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266235, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian 116023, China
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Liu Q, Liu C, Jiang L, Li M, Long T, He W, Qin G, Chen L, Zhou J. α7 Nicotinic acetylcholine receptor-mediated anti-inflammatory effect in a chronic migraine rat model via the attenuation of glial cell activation. J Pain Res 2018; 11:1129-1140. [PMID: 29942148 PMCID: PMC6007207 DOI: 10.2147/jpr.s159146] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Background Evidence suggests that the activation of α7 nicotinic acetylcholine receptor (α7nAChR) can greatly decrease the neuroinflammation response. Neuroinflammation plays a pivotal role in the pathogenesis of chronic migraine (CM). Clinical observations also show that nicotine gum induces analgesic effects in migraine patients. However, whether α7nAChR is involved in CM is unclear. Objective To investigate the role of α7nAChR in CM and provide a new therapeutic target for CM. Materials and methods Thirty-six male Sprague–Dawley rats were distributed randomly into control, CM, PNU-282987, and α-bungarotoxin groups (n=9 rats in each group). The CM model was established by the recurrent daily administration of inflammatory soup on the dura over the course of 1 week. The hind paw threshold and facial allodynia were assessed by the von Frey test. The expression levels of α7nAChR, tumor necrosis factor-alpha, and interleukin-1 beta were analyzed by Western blot and real-time fluorescence quantitative polymerase chain reaction. The location of α7nAChR in the hippocampus was quantified by immunofluorescence, as well as the microglial and astrocyte alterations. Changes in the calcitonin gene-related peptide and the phosphorylated JNK protein among different groups were measured by Western blot. Results We found that the expression of α7nAChR was reduced after repeated inflammatory soup administration. The increased expression of tumor necrosis factor-alpha, interleukin-1 beta, and calcitonin gene-related peptide in CM group were significantly decreased by PNU-282987 and aggravated by α-bungarotoxin. Moreover, PNU-282987 decreased the numbers of astrocytes and microglia compared with the numbers in the CM group in both hippocampal CA1 and CA3 regions. In contrast, α-bungarotoxin activated the astrocytes and microglia, but the differences with respect to the CM group were not significant. Activated c-Jun N-terminal kinase signaling was observed in CM rats and was also blocked by PNU-282987. Conclusion The activation of α7nAChR increased the mechanical threshold and alleviated pain in the CM rat model. α7nAChR activation also decreased the upregulation of astrocytes and microglia through the p-c-Jun N-terminal kinase–mitogen-activated protein kinase signaling pathway.
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Affiliation(s)
- Qing Liu
- Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Chaoyang Liu
- Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Li Jiang
- Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Maolin Li
- Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Ting Long
- Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Wei He
- Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Guangcheng Qin
- Laboratory Research Center, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Lixue Chen
- Laboratory Research Center, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Jiying Zhou
- Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
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18
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Zhang Y, Wang H, Ke J, Wei Y, Ji H, Qian Z, Liu L, Tao J. Inhibition of A-Type K+ Channels by Urotensin-II Induces Sensory Neuronal Hyperexcitability Through the PKCα-ERK Pathway. Endocrinology 2018; 159:2253-2263. [PMID: 29648633 DOI: 10.1210/en.2018-00108] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 03/21/2018] [Indexed: 12/12/2022]
Abstract
Previous studies have implicated urotensin-II in the nociception of sensory neurons. However, to date the relevant mechanisms remain unknown. In the current study we determined the role of urotensin-II in the regulation of transient outward A-type potassium currents (IA) and neuronal excitability in trigeminal ganglion (TG) neurons. We found that application of urotensin-II to small-diameter TG neurons decreased IA in a dose-dependent manner, whereas the delayed rectifier potassium current was unaffected. The IA decrease induced by urotensin-II depended on the urotensin-II receptor (UT-R) and was associated with a hyperpolarizing shift in the steady-state inactivation curve. Exposure of TG cells to urotensin-II markedly increased protein kinase C (PKC) activity, and PKC inhibition eliminated the UT-R-mediated IA decrease. Antagonism of PKCα, either pharmacologically or genetically, but not of PKCβ prevented the decrease in IA induced by urotensin-II. Analysis of phospho-extracellular signal-regulated kinase (p-ERK) revealed that urotensin-II significantly increased the expression level of p-ERK, whereas p-p38 and p-c-Jun N-terminal kinase remained unchanged. Inhibition of mitogen-activated protein kinase/ERK signaling by the kinase antagonist U0126 and PD98059 completely abolished the UT-R-mediated IA decrease. Moreover, urotensin-II significantly increased the action potential firing rate of small TG neurons; pretreatment with 4-aminopyridine prevented this effect. In summary, our findings suggest that urotensin-II selectively attenuated IA through stimulation of the PKCα-dependent ERK1/2 signaling pathway. This UT-R-dependent mechanism might contribute to neuronal hyperexcitability in TG neurons.
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Affiliation(s)
- Yuan Zhang
- Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
- Department of Geriatrics & Institute of Neuroscience, The Second Affiliated Hospital of Soochow University, Suzhou, People's Republic of China
| | - Hua Wang
- Department of Endocrinology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
- Department of Physiology and Neurobiology, Medical College of Soochow University, Suzhou, People's Republic of China
| | - Jin Ke
- Department of Physiology and Neurobiology, Medical College of Soochow University, Suzhou, People's Republic of China
| | - Yuan Wei
- Department of Physiology and Neurobiology, Medical College of Soochow University, Suzhou, People's Republic of China
| | - Heyi Ji
- Department of Physiology and Neurobiology, Medical College of Soochow University, Suzhou, People's Republic of China
| | - Zhiyuan Qian
- Department of Geriatrics & Institute of Neuroscience, The Second Affiliated Hospital of Soochow University, Suzhou, People's Republic of China
| | - Li Liu
- Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Jin Tao
- Department of Physiology and Neurobiology, Medical College of Soochow University, Suzhou, People's Republic of China
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Lin Y, Liu L, Jiang H, Zhou J, Tang Y. Inhibition of interleukin-6 function attenuates the central sensitization and pain behavior induced by osteoarthritis. Eur J Pharmacol 2017; 811:260-267. [PMID: 28663035 DOI: 10.1016/j.ejphar.2017.06.032] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 06/22/2017] [Accepted: 06/26/2017] [Indexed: 02/06/2023]
Abstract
Chronic pain is the most prominent and disabling symptom in the patients with osteoarthritis (OA), and the underlying mechanism largely remains unclear. Interleukin-6 (IL-6), a proinflammatory cytokine, is critically involved in the development and maintenance of central sensitization in several rodent models of chronic pain. The present study aims to elucidate the IL-6 mediated neurological adaptation in dorsal horn in the rat with monosodium iodoacetate (MIA) - induced OA. Significant upregulation of IL-6 expression was detected in the dorsal horn in the modeled rats. Blockade of IL-6 function by tocilizumab markedly suppressed the activation of astrocytes and microglia in the ipsilateral dorsal horn, reduced c-Fos immunoreactivity in dorsal horn neurons, and attenuated the upregulation of glutamate receptor subunits GluR1 and NR2B in dorsal horn in the rats with MIA-induced OA. It was further reported that administration of tocilizumab significantly improved the performance in weight-bearing test and mitigated the mechanical allodynia in the modeled rats. These data illustrated spinal IL-6 mediated mechanism underlying the chronic pain, and proposed the potential therapeutic effect of tocilizumab on the chronic pain in the setting of OA.
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Affiliation(s)
- Yuangui Lin
- Department of Anesthesiology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Disease of Women and Children(Sichuan University), Ministry of Education, Chengdu, China
| | - Lian Liu
- Division of Pulmonary Diseases, State Key Laboratory of Biotherapy of China, Sichuan University, Chengdu, Sichuan, China
| | - Haixia Jiang
- Department of Anesthesiology, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China; Department of Anesthesiology and Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jieshu Zhou
- Department of Anesthesiology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Disease of Women and Children(Sichuan University), Ministry of Education, Chengdu, China
| | - Yuying Tang
- Department of Anesthesiology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, China; Key Laboratory of Birth Defects and Related Disease of Women and Children(Sichuan University), Ministry of Education, Chengdu, China.
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Wang ZC, Li LH, Bian C, Yang L, Lv N, Zhang YQ. Involvement of NF-κB and the CX3CR1 Signaling Network in Mechanical Allodynia Induced by Tetanic Sciatic Stimulation. Neurosci Bull 2017; 34:64-73. [PMID: 28612319 DOI: 10.1007/s12264-017-0149-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 03/17/2017] [Indexed: 01/15/2023] Open
Abstract
Tetanic stimulation of the sciatic nerve (TSS) triggers long-term potentiation in the dorsal horn of the spinal cord and long-lasting pain hypersensitivity. CX3CL1-CX3CR1 signaling is an important pathway in neuronal-microglial activation. Nuclear factor κB (NF-κB) is a key signal transduction molecule that regulates neuroinflammation and neuropathic pain. Here, we set out to determine whether and how NF-κB and CX3CR1 are involved in the mechanism underlying the pathological changes induced by TSS. After unilateral TSS, significant bilateral mechanical allodynia was induced, as assessed by the von Frey test. The expression of phosphorylated NF-κB (pNF-κB) and CX3CR1 was significantly up-regulated in the bilateral dorsal horn. Immunofluorescence staining demonstrated that pNF-κB and NeuN co-existed, implying that the NF-κB pathway is predominantly activated in neurons following TSS. Administration of either the NF-κB inhibitor ammonium pyrrolidine dithiocarbamate or a CX3CR1-neutralizing antibody blocked the development and maintenance of neuropathic pain. In addition, blockade of NF-κB down-regulated the expression of CX3CL1-CX3CR1 signaling, and conversely the CX3CR1-neutralizing antibody also down-regulated pNF-κB. These findings suggest an involvement of NF-κB and the CX3CR1 signaling network in the development and maintenance of TSS-induced mechanical allodynia. Our work suggests the potential clinical application of NF-κB inhibitors or CX3CR1-neutralizing antibodies in treating pathological pain.
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Affiliation(s)
- Zhe-Chen Wang
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, 200032, China
| | - Li-Hong Li
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Chao Bian
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, 200032, China
| | - Liu Yang
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, 200032, China.
| | - Ning Lv
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, 200032, China
| | - Yu-Qiu Zhang
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, 200032, China.
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