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He L, Ma S, Ding Z, Huang Z, Zhang Y, Xi C, Zou K, Deng Q, Huang WJM, Guo Q, Huang C. Inhibition of NFAT5-Dependent Astrocyte Swelling Alleviates Neuropathic Pain. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2302916. [PMID: 38195869 PMCID: PMC10953562 DOI: 10.1002/advs.202302916] [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: 05/08/2023] [Revised: 12/03/2023] [Indexed: 01/11/2024]
Abstract
Astrocyte swelling is implicated in various neurological disorders. However, whether astrocyte swelling contributes to neuropathic pain remains elusive. This study elucidates the pivotal role of the nuclear factor of activated T-cells 5 (NFAT5) emerges as a master regulator of astrocyte swelling in the spinal dorsal horn (SDH) during neuropathic pain. Despite the ubiquitous expression of NFAT5 protein in SDH cell types, it selectively induces swelling specifically in astrocytes, not in microglia. Mechanistically, NFAT5 directly controls the expression of the water channel aquaporin-4 (AQP4), a key regulator exclusive to astrocytes. Additionally, aurora kinase B (AURKB) orchestrates NFAT5 phosphorylation, enhancing its protein stability and nuclear translocation, thereby regulating AQP4 expression. The findings establish NFAT5 as a crucial regulator for neuropathic pain through the modulation of astrocyte swelling. The AURKB-NFAT5-AQP4 pathway in astrocytes emerges as a potential therapeutic target to combat neuropathic pain.
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Affiliation(s)
- Liqiong He
- Department of AnesthesiologyXiangya HospitalCentral South UniversityChangsha410008China
| | - Shengyun Ma
- Department of Cellular and Molecular MedicineUniversity of California San DiegoSan DiegoCA92093USA
| | - Zijin Ding
- Department of AnesthesiologyXiangya HospitalCentral South UniversityChangsha410008China
| | - Zhifeng Huang
- Department of AnesthesiologyXiangya HospitalCentral South UniversityChangsha410008China
| | - Yu Zhang
- Department of AnesthesiologyXiangya HospitalCentral South UniversityChangsha410008China
| | - Caiyun Xi
- Department of AnesthesiologyXiangya HospitalCentral South UniversityChangsha410008China
| | - Kailu Zou
- Department of AnesthesiologyXiangya HospitalCentral South UniversityChangsha410008China
| | - Qingwei Deng
- Department of AnesthesiologyXiangya HospitalCentral South UniversityChangsha410008China
| | - Wendy Jia Men Huang
- Department of Cellular and Molecular MedicineUniversity of California San DiegoSan DiegoCA92093USA
| | - Qulian Guo
- Department of AnesthesiologyXiangya HospitalCentral South UniversityChangsha410008China
- National Clinical Research Center for Geriatric DisordersXiangya HospitalCentral South UniversityChangsha410008China
| | - Changsheng Huang
- Department of AnesthesiologyXiangya HospitalCentral South UniversityChangsha410008China
- National Clinical Research Center for Geriatric DisordersXiangya HospitalCentral South UniversityChangsha410008China
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CXCR4/CX43 Regulate Diabetic Neuropathic Pain via Intercellular Interactions between Activated Neurons and Dysfunctional Astrocytes during Late Phase of Diabetes in Rats and the Effects of Antioxidant N-Acetyl-L-Cysteine. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:8547563. [PMID: 35799894 PMCID: PMC9256426 DOI: 10.1155/2022/8547563] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 06/15/2022] [Indexed: 12/12/2022]
Abstract
Growing evidence suggests that the interactions between astrocytes and neurons exert important functions in the central sensitization of the spinal cord dorsal horn in rodents with diabetes and neuropathic pain (DNP). However, it still remains unclear how signal transmission occurs in the spinal cord dorsal horn between astrocytes and neurons, especially in subjects with DNP. Chemokine CXC receptor 4 (CXCR4) plays critical roles in DNP, and connexin 43 (CX43), which is also primarily expressed by astrocytes, contributes to the development of neuropathy. We thus postulated that astrocytic and neuronal CXCR4 induces and produces inflammatory factors under persistent peripheral noxious stimulation in DNP, while intercellular CX43 can transmit inflammatory stimulation signals. The results showed that streptozotocin-induced type 1 diabetic rats developed heat hyperalgesia and mechanical allodynia. Diabetes led to persistent neuropathic pain. Diabetic rats developed peripheral sensitization at the early phase (2 weeks) and central sensitization at the late phase (5 weeks) after diabetes induction. Both CXCR4 and CX43, which are localized and coexpressed in neurons and astrocytes, were enhanced significantly in the dorsal horn of spinal cord in rats undergoing DNP during late phase of diabetes, and the CXCR4 antagonist AMD3100 reduced the expression of CX43. The nociceptive behavior was reversed, respectively, by AMD3100 at the early phase and by the antioxidant N-acetyl-L-cysteine (NAC) at the late phase. Furthermore, rats with DNP demonstrated downregulation of glial fibrillary acidic protein (GFAP) as well as upregulation of c-fos in the spinal cord dorsal horn at the late phase compared to the controls, and upregulation of GFAP and downregulation of c-fos were observed upon treatment with NAC. Given that GFAP and c-fos are, respectively, makers of astrocyte and neuronal activation, our findings suggest that CXCR4 as an inflammatory stimulation protein and CX43 as an intercellular signal transmission protein both may induce neurons excitability and astrocytes dysfunction in developing DNP.
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Matsuura K, Sakai A, Watanabe Y, Mikahara Y, Sakamoto A, Suzuki H. Endothelin receptor type A is involved in the development of oxaliplatin-induced mechanical allodynia and cold allodynia acting through spinal and peripheral mechanisms in rats. Mol Pain 2021; 17:17448069211058004. [PMID: 34894846 PMCID: PMC8679041 DOI: 10.1177/17448069211058004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Oxaliplatin, a platinum-based chemotherapeutic agent, frequently causes severe
neuropathic pain typically encompassing cold allodynia and long-lasting mechanical
allodynia. Endothelin has been shown to modulate nociceptive transmission in a variety of
pain disorders. However, the action of endothelin varies greatly depending on many
variables, including pain causes, receptor types (endothelin type A (ETA) and B
(ETB) receptors) and organs (periphery and spinal cord). Therefore, in this
study, we investigated the role of endothelin in a Sprague–Dawley rat model of
oxaliplatin-induced neuropathic pain. Intraperitoneal administration of bosentan, a dual
ETA/ETB receptor antagonist, effectively blocked the development
or prevented the onset of both cold allodynia and mechanical allodynia. The preventive
effects were exclusively mediated by ETA receptor antagonism. Intrathecal
administration of an ETA receptor antagonist prevented development of
long-lasting mechanical allodynia but not cold allodynia. In marked contrast, an
intraplantar ETA receptor antagonist had a suppressive effect on cold allodynia
but only had a partial and transient effect on mechanical allodynia. In conclusion,
ETA receptor antagonism effectively prevented long-lasting mechanical
allodynia through spinal and peripheral actions, while cold allodynia was prevented
through peripheral actions.
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Affiliation(s)
- Kae Matsuura
- Department of Anesthesiology, 26367Nippon Medical School, Bunkyo-ku, Japan.,Department of Pharmacology, 26367Nippon Medical School, Bunkyo-ku, Japan
| | - Atsushi Sakai
- Department of Pharmacology, 26367Nippon Medical School, Bunkyo-ku, Japan
| | - Yuji Watanabe
- Department of Pharmacology, 26367Nippon Medical School, Bunkyo-ku, Japan
| | - Yasunori Mikahara
- Department of Pharmacology, 26367Nippon Medical School, Bunkyo-ku, Japan
| | - Atsuhiro Sakamoto
- Department of Anesthesiology, 26367Nippon Medical School, Bunkyo-ku, Japan
| | - Hidenori Suzuki
- Department of Pharmacology, 26367Nippon Medical School, Bunkyo-ku, Japan
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Tai WL, Sun L, Li H, Gu P, Joosten EA, Cheung CW. Additive Effects of Environmental Enrichment and Ketamine on Neuropathic Pain Relief by Reducing Glutamatergic Activation in Spinal Cord Injury in Rats. Front Neurosci 2021; 15:635187. [PMID: 33828447 PMCID: PMC8019908 DOI: 10.3389/fnins.2021.635187] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 02/05/2021] [Indexed: 11/20/2022] Open
Abstract
Spinal cord injury (SCI) impairs mobility and often results in complications like intractable neuropathic pain. A multi-approach management of this chronic pain condition has been encouraged, but little has been explored of the field. Here, we focus on the effect and underlying mechanism of environmental enrichment (EE), which promotes voluntary social and physical activities, combined with a clinical analgesic, ketamine, on SCI-induced neuropathic pain as well as motor dysfunction. We performed T13 spinal hemisection in rats, which induced unilateral motor impairment and neuropathic pain-like behaviors in the hindlimb. Treatment regimen started a week after SCI, which consists of ketamine administration (30 mg kg–1 day–1; intramuscular) for 10 days, or EE housing for 20 days, or their combination. Paw withdrawal response to mechanical and thermal stimuli, motor function, burrowing behaviors, and body weight was monitored. Spinal segments at T13 lesion and L4–L6 were collected for histopathological and protein analyses. The joint treatment of EE and ketamine provided greater relief of pain-like behaviors and locomotor recovery than did either paradigm alone. These improvements were associated with reduced cavitation area, astrogliosis, and perilesional phosphorylation of glutamate N-methyl-D-aspartate receptor (NMDAR). Concurrently, lumbar spinal analysis of NMDAR-linked excitatory markers in hypersensitization showed reduced activation of NMDAR, mitogen-activated protein kinase (MAPK) family, nuclear factor (NF)-κB, interleukin (IL)-1β signaling, and restored excitatory amino acid transporter 2 level. Our data support a better therapeutic efficacy of the combination, EE, and ketamine, in the attenuation of neuropathic pain and motor recovery by reducing spinal glutamatergic activation, signifying a potential multifaceted neurorehabilitation strategy to improve SCI patient outcome.
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Affiliation(s)
- W L Tai
- Laboratory and Clinical Research Institute for Pain, Department of Anesthesiology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - L Sun
- Laboratory and Clinical Research Institute for Pain, Department of Anesthesiology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China.,The First Rehabilitation Hospital of Shanghai, Brain and Spinal Cord Innovation Research Center, Advanced Institute of Translational Medicine, Tongji University School of Medicine, Shanghai, China
| | - H Li
- Laboratory and Clinical Research Institute for Pain, Department of Anesthesiology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - P Gu
- Laboratory and Clinical Research Institute for Pain, Department of Anesthesiology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - E A Joosten
- Laboratory and Clinical Research Institute for Pain, Department of Anesthesiology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China.,Department of Anesthesiology and Pain Management, University Pain Centre Maastricht (UPCM), Maastricht University Medical Centre, Maastricht, Netherlands.,Department of Translational Neuroscience, School for Mental Health and Neuroscience, Maastricht University, Maastricht, Netherlands
| | - C W Cheung
- Laboratory and Clinical Research Institute for Pain, Department of Anesthesiology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
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Chen J, Wang G, Sun T, Ma C, Huo X, Kong Y. Involvement of TCF7L2 in generation of morphine-induced antinociceptive tolerance and hyperalgesia by modulating TLR4/ NF-κB/NLRP3 in microglia. Toxicol Appl Pharmacol 2021; 416:115458. [PMID: 33607128 DOI: 10.1016/j.taap.2021.115458] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 01/29/2021] [Accepted: 02/10/2021] [Indexed: 12/28/2022]
Abstract
Morphine is an opioid agonist and a nonselective mu, kappa and delta receptor agonist. It is a commonly used analgesic drug for the treatment of acute and chronic pain as well as cancer pain. Morphine is particularly important to address the problem of morphine tolerance. Tcf7l2, known as a risk gene for schizophrenia and autism, encodes a member of the LEF1/TCF transcription factor family. TCF7L2 is an important transcription factor that is upregulated in neuropathic pain models. However, the relationship between TCF7L2 and morphine tolerance has not been reported. In this study, we found that morphine tolerance led to the upregulation of TCF7L2 in the spinal cord, and also led to the upregulation of TCF7L2 expression in glial cells, which promoted inflammation related signal, and activated TLR4 / NF-κB/NLRP3 pathway. In addition, TCF7L2 regulated microglial cell activation induced by chronic morphine treatment. Mechanically, we found that TCF7L2 transcriptionally regulated TLR4 expression, and the depletion of TCF7L2 alleviated morphine tolerance induced by chronic morphine treatment, and further alleviated pain hypersensitivity induced by chronic morphine treatment. We therefore suggested that TCF7L2 regulates the activation of TLR4/ NF-κB/NLRP3 pathway in microglia, and is involved in the formation of morphine tolerance. Our results provide a new idea for the regulation mechanism of morphine tolerance.
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Affiliation(s)
- Jing Chen
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang Province 150081, China
| | - Guonian Wang
- Harbin Medical University Sino-Russian Research Center Pain Management Research Institute, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province 150001, China.
| | - Tingting Sun
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang Province 150081, China
| | - Chao Ma
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang Province 150081, China
| | - Xing Huo
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang Province 150081, China
| | - Yiran Kong
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang Province 150081, China
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Gu P, Fan T, Wong SSC, Pan Z, Tai WL, Chung SK, Cheung CW. Central Endothelin-1 Confers Analgesia by Triggering Spinal Neuronal Histone Deacetylase 5 (HDAC5) Nuclear Exclusion in Peripheral Neuropathic Pain in Mice. THE JOURNAL OF PAIN 2021; 22:454-471. [PMID: 33421591 DOI: 10.1016/j.jpain.2020.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 10/06/2020] [Accepted: 12/14/2020] [Indexed: 11/17/2022]
Abstract
The rationale of spinal administration of endothelin-1(ET-1) mediated anti-nociceptive effect has not been elucidated. ET-1 is reported to promote nuclear effluxion of histone deacetylase 5 (HDAC5) in myocytes, and spinal HDAC5 is implicated in modulation of pain processing. In this study, we aimed to investigate whether central ET-1 plays an anti-nociceptive role by facilitating spinal HDAC5 nuclear shuttling under neuropathic pain. Here, we demonstrate that upregulating spinal ET-1 attenuated the nociception induced by partial sciatic nerve ligation surgery and this analgesic effect mediated by ET-1 was attenuated by intrathecal injection of endothelin A receptor selective inhibitor (BQ123) or by blocking the exportation of nuclear HDAC5 by adeno-associated viruses targeting neuronal HDAC5 (AVV-HDAC5 S259/498A Mutant). Notably, ET-1 administration increased spinal glutamate acid decarboxylases (GAD65/67) expression via initiating HDAC5 nuclear exportation and increased the acetylation of histone 3 at lysine 9 (Acetyl-H3K9) in the promotor regions of spinal Gad1 and Gad2 genes. This was reversed by blocking endothelin A receptor function or by inhibiting the spinal neuronal nuclear exportation of HDAC5. Therefore, inducing spinal GABAergic neuronal HDAC5 nuclear exportation may be a novel therapeutic approach for managing neuropathic pain. PERSPECTIVE: Neuropathic pain is intractable in a clinical setting, and epigenetic regulation is considered to contribute to this processing. Characterizing the anti-nociceptive effect of ET-1 and investigating the associated epigenetic mechanisms in animal models may lead to the development of new therapeutic strategies and targets for treating neuropathic pain.
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Affiliation(s)
- Pan Gu
- Department of Anaesthesiology, The University of Hong Kong, HKSAR, China; Laboratory and Clinical Research Institute for Pain, The University of Hong Kong, HKSAR, China; Department of Anaesthesiology, The University of Hong Kong-Shenzhen Hospital, Guangdong province, China
| | - Tingting Fan
- Department of Anaesthesiology, The University of Hong Kong, HKSAR, China; Laboratory and Clinical Research Institute for Pain, The University of Hong Kong, HKSAR, China
| | - Stanley Sau Ching Wong
- Department of Anaesthesiology, The University of Hong Kong, HKSAR, China; Laboratory and Clinical Research Institute for Pain, The University of Hong Kong, HKSAR, China
| | - Zhiqiang Pan
- Jiangsu Province Key Laboratory of Anaesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Wai Lydia Tai
- Department of Anaesthesiology, The University of Hong Kong, HKSAR, China; Laboratory and Clinical Research Institute for Pain, The University of Hong Kong, HKSAR, China; Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts
| | - Sookja Kim Chung
- Macau University of Science and Technology, Taipa, Macau; School of Biomedical Sciences, The State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong
| | - Chi Wai Cheung
- Department of Anaesthesiology, The University of Hong Kong, HKSAR, China; Laboratory and Clinical Research Institute for Pain, The University of Hong Kong, HKSAR, China; Research Centre of Heart, Brain, Hormone & Healthy Aging, The University of Hong Kong, HKSAR, China; Department of Anaesthesiology, The University of Hong Kong-Shenzhen Hospital, Guangdong province, China.
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7
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Li MK, Liu LX, Zhang WY, Zhan HL, Chen RP, Feng JL, Wu LF. Long non‑coding RNA MEG3 suppresses epithelial‑to‑mesenchymal transition by inhibiting the PSAT1‑dependent GSK‑3β/Snail signaling pathway in esophageal squamous cell carcinoma. Oncol Rep 2020; 44:2130-2142. [PMID: 32901893 PMCID: PMC7550985 DOI: 10.3892/or.2020.7754] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 07/29/2020] [Indexed: 02/07/2023] Open
Abstract
Esophageal squamous cell carcinoma (ESCC) is the main subtype of esophageal cancer in China, and the prognosis of patients remains poor mainly due to the occurrence of lymph node and distant metastasis. The long non‑coding RNA (lncRNA) maternally expressed gene 3 (MEG3) has been shown to have tumor‑suppressive properties and to play an important role in epithelial‑to‑mesenchymal transition (EMT) in some solid tumors. However, whether MEG3 is involved in EMT in ESCC remains unclear. In the present study, the MEG3 expression level and its association with tumorigenesis were determined in 43 tumor tissues of patients with ESCC and in ESCC cells using reverse transcription‑quantitative PCR analysis. Gene microarray analysis was performed to detect differentially expressed genes (DEGs). Based on the functional annotation results, the effects of ectopic expression of MEG3 on cell growth, migration, invasion and EMT were assessed. MEG3 expression level was found to be markedly lower in tumor tissues and cells. Statistical analysis revealed that MEG3 expression was significantly negatively associated with lymph node metastasis and TNM stage in ESCC. Fluorescence in situ hybridization assay demonstrated that MEG3 was expressed mainly in the nucleus. Ectopic expression of MEG3 inhibited cell proliferation, migration, invasion and cell cycle progression in EC109 cells. Gene microarray results demonstrated that 177 genes were differentially expressed ≥2.0 fold in MEG3‑overexpressing cells, including 23 upregulated and 154 downregulated genes. Functional annotation revealed that the DEGs were mainly involved in amino acid biosynthetic process, mitogen‑activated protein kinase signaling, and serine and glycine metabolism. Further experiments indicated that the ectopic expression of MEG3 significantly suppressed cell proliferation, migration, invasion and EMT by downregulating phosphoserine aminotransferase 1 (PSAT1). In pathological tissues, PSAT1 and MEG3 were significantly negatively correlated, and high expression of PSAT1 predicted poor survival. Taken together, these results suggest that MEG3 may be a useful prognostic biomarker and may suppress EMT by inhibiting the PSAT1‑dependent glycogen synthase kinase‑3β/Snail signaling pathway in ESCC.
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Affiliation(s)
- Ming-Kai Li
- Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Li-Xuan Liu
- Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Wei-Yi Zhang
- Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Hao-Lian Zhan
- Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Rui-Pei Chen
- Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Jia-Lin Feng
- Department of Information, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Ling-Fei Wu
- Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
- Correspondence to: Professor Ling-Fei Wu, Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, 69 Dongxia Road, Shantou, Guangdong 515041, P.R. China, E-mail:
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Ou M, Zhao H, Ji G, Zhao X, Zhang Q. Long noncoding RNA MALAT1 contributes to pregnancy-induced hypertension development by enhancing oxidative stress and inflammation through the regulation of the miR-150-5p/ET-1 axis. FASEB J 2020; 34:6070-6085. [PMID: 32246794 DOI: 10.1096/fj.201902280r] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 01/06/2020] [Accepted: 02/02/2020] [Indexed: 12/21/2022]
Abstract
Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) has been identified previously in the pathogenesis of hypertension and some gestational diseases. However, the biological functions of MALAT1 in pregnancy-induced hypertension (PIH) are still poorly understood. Herein, we aim to explore the functional relevance of MALAT1 in PIH and to explain the potential underlying mechanisms. We found that the levels of ET-1 and MALAT1 were upregulated and that of miR-150-5p were downregulated in the serum of pregnant women with PIH and the aortic endothelial cells (ECs) of reduced uterine perfusion pressure (RUPP)-induced rat models. In aortic ECs, MALAT1 could competitively bind to miR-150-5p to upregulate the expression of ET-1. The MALAT1/miR-150-5p/ET-1 axis regulated the expression of endothelin B receptor (ETBR) in aortic ECs leading to oxidative stress imbalance and increased the release of proinflammatory cytokines (IL-18 and IL-1β), which concurrently activated the NF-κB pathway to regulate the ETBR expression and to stimulate smooth muscle cell (SMC) contraction. Furthermore, silencing MALAT1 could alleviate the hypertensive symptoms of RUPP-induced rat models. Taken conjointly, the upregulation of MALAT1 can reduce the expression of ET-1 by competitively binding to miR-150-5p, which enhances the expression of ETBR via the activation of the NF-κB pathway in SMCs, thus exacerbating the hypertensive symptoms in the RUPP-induced rat models.
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Affiliation(s)
- Minghui Ou
- Department of Vascular Surgery, Qingdao Municipal Hospital, Qingdao, P.R. China
| | - Huidong Zhao
- Department of Obstetrics, Qingdao Municipal Hospital, Qingdao, P.R. China
| | - Guoxin Ji
- Department of Obstetrics, Qingdao Municipal Hospital, Qingdao, P.R. China
| | - Xin Zhao
- Department of Obstetrics, Qingdao Municipal Hospital, Qingdao, P.R. China
| | - Qian Zhang
- Department of Obstetrics, Qingdao Municipal Hospital, Qingdao, P.R. China
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Progressive Increase of Inflammatory CXCR4 and TNF-Alpha in the Dorsal Root Ganglia and Spinal Cord Maintains Peripheral and Central Sensitization to Diabetic Neuropathic Pain in Rats. Mediators Inflamm 2019; 2019:4856156. [PMID: 31001066 PMCID: PMC6437743 DOI: 10.1155/2019/4856156] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Accepted: 02/10/2019] [Indexed: 12/12/2022] Open
Abstract
Diabetic neuropathic pain (DNP) is a common and serious complication of diabetic patients. The pathogenesis of DNP is largely unclear. The proinflammation proteins, CXCR4, and TNF-α play critical roles in the development of pain, while their relative roles in the development of DNP and especially its progression is unknown. We proposed that establishment of diabetic pain models in rodents and evaluating the stability of behavioral tests are necessary approaches to better understand the mechanism of DNP. In this study, Von Frey and Hargreaves Apparatus was used to analyze the behavioral changes of mechanical allodynia and heat hyperalgesia in streptozotocin-induced diabetic rats at different phases of diabetes. Moreover, CXCR4 and TNF-α of spinal cord dorsal and dorsal root ganglia (DRG) were detected by western blotting and immunostaining over time. The values of paw withdrawal threshold (PWT) and paw withdrawal latencies (PWL) were reduced as early as 1 week in diabetic rats and persistently maintained at lower levels during the progression of diabetes as compared to control rats that were concomitant with significant increases of both CXCR4 and TNF-α protein expressions in the DRG at 2 weeks and 5 weeks (the end of the experiments) of diabetes. By contrast, CXCR4 and TNF-α in the spinal cord dorsal horn did not significantly increase at 2 weeks of diabetes while both were significantly upregulated at 5 weeks of diabetes. The results indicate that central sensitization of spinal cord dorsal may result from persistent peripheral sensitization and suggest a potential reference for further treatment of DNP.
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Lu M, Guo S, Hong F, Zhang Y, Yuan L, Ma C, Ma J. Pax2 is essential for proliferation and osteogenic differentiation of mouse mesenchymal stem cells via Runx2. Exp Cell Res 2018; 371:342-352. [DOI: 10.1016/j.yexcr.2018.08.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 08/19/2018] [Accepted: 08/21/2018] [Indexed: 01/09/2023]
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