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Guo H, Du M, Yang Y, Lin X, Wang Y, Li H, Ren J, Xu W, Yan J, Wang N. Sp1 Regulates the M1 Polarization of Microglia Through the HuR/NF-κB Axis after Spinal Cord Injury. Neuroscience 2024; 544:50-63. [PMID: 38387733 DOI: 10.1016/j.neuroscience.2024.02.014] [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: 11/26/2023] [Revised: 02/14/2024] [Accepted: 02/16/2024] [Indexed: 02/24/2024]
Abstract
The M1 polarization of microglia, followed by the production of pro-inflammatory mediators, hinders functional recovery after spinal cord injury (SCI). Our previous study has illuminated that specificity protein 1 (Sp1) expression is increased following SCI, whereas the function and regulatory mechanism of Sp1 during M1 polarization of microglia following SCI remain unknown. RNA binding protein, HuR, has been shown to be up-regulated in the injured spinal cord through analysis of the GEO database. Further investigation using Chip-Atlas data suggests a binding between Sp1 and HuR. Emerging evidence indicates that HuR plays a pivotal role in neuroinflammation after SCI. In this research, Sp1 and HuR levels in mice with SCI and BV2 cells treated with lipopolysaccharide (LPS) was determined by using quantitative real-time polymerase chain reaction and Western blotting techniques. A series of in vitro assays were performed to investigate the function of Sp1 during M1 polarization of microglia. The association between Sp1 and its target gene HuR was confirmed through gene transfection and luciferase reporter assay. Enhanced expression of HuR was observed in both SCI mice and LPS-treated BV2 cells, while Sp1 knockdown restrained M1 polarization of microglia and its associated inflammation by inhibiting the NF-κB signaling pathway. Silencing Sp1 also suppressed microglia activation and its mediated inflammatory response, which could be reversed by overexpression of HuR. In conclusion, silencing Sp1 restrains M1 polarization of microglia through the HuR/NF-κB axis, leading to neuroprotection, and thus promotes functional restoration following SCI.
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Affiliation(s)
- Hangyu Guo
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Mingyu Du
- Department of Operating Room, First Affiliated Hospital of Harbin Medical University, Harbin, 150007, PR China
| | - Yang Yang
- Department of Spine Surgery, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, PR China
| | - Xin Lin
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou 350001, PR China
| | - Yufu Wang
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Helin Li
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Jiyu Ren
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Wenbo Xu
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Jinglong Yan
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China.
| | - Nanxiang Wang
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China.
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Jian J, Li LG, Zhao PJ, Zheng RJ, Dong XW, Zhao YH, Yin BQ, Li S, Cheng H, Li HL, Li EY. Mouse nerve growth factor suppresses neuronal apoptosis in valproic acid-induced autism spectrum disorder rats by regulating the phosphoinositide-3-kinase/serine/threonine kinase signaling pathway. Pharmacogenet Genomics 2023; 33:101-110. [PMID: 37261937 DOI: 10.1097/fpc.0000000000000498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Autism spectrum disorder (ASD) is a group of neurodevelopmental disorders characterized by deficits in social communication and restrictive behaviors. Mouse nerve growth factor (mNGF), a neurotrophic factor, is critical for neuronal growth and survival, and the mNGF treatment is considered a promising therapy for neurodegeneration. In light of this, we aimed to evaluate the effect of mNGF on neurological function in ASD. METHODS An ASD rat model was established by intraperitoneal injection of valproic acid (VPA). Social behavior, learning, and memory of the rats were measured. TdT-mediated dUTP Nick-end labeling and Nissl assays were performed to detect neuronal apoptosis and survival in the hippocampus and prefrontal cortex. Apoptosis-related proteins and oxidative stress markers were detected. RESULTS mNGF improved locomotor activity, exploratory behavior, social interaction, and spatial learning and memory in VPA-induced ASD rats. In the hippocampus and prefrontal cortex, mNGF suppressed neuronal apoptosis, increased the number of neurons, superoxide dismutase, and glutathione levels, and decreased reactive oxygen species, nitric oxide, TNF-α, and IL-1β levels compared with the VPA group. In addition, mNGF increased the levels of Bcl-2, p-phosphoinositide-3-kinase (PI3K), and p-serine/threonine kinase (Akt), and decreased the levels of Bax and cleaved caspase-3, while the PI3K inhibitor LY294002 reversed these effects. CONCLUSION These data suggest that mNGF suppressed neuronal apoptosis and ameliorated the abnormal behaviors in VPA-induced ASD rats, in part, by activating the PI3K/Akt signaling pathway.
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Affiliation(s)
- Jie Jian
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, the Fifth Affiliated Hospital of Zhengzhou University
| | - Li-Guo Li
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, the Fifth Affiliated Hospital of Zhengzhou University
- Institute of Health Engineering, Zhengzhou Health Vocational College, Zhengzhou
| | - Peng-Ju Zhao
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, the Fifth Affiliated Hospital of Zhengzhou University
| | - Rui-Juan Zheng
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, the Fifth Affiliated Hospital of Zhengzhou University
| | - Xian-Wen Dong
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, the Fifth Affiliated Hospital of Zhengzhou University
| | - Yong-Hong Zhao
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, the Fifth Affiliated Hospital of Zhengzhou University
| | - Bao-Qi Yin
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, the Fifth Affiliated Hospital of Zhengzhou University
| | - Sheng Li
- College of Life Sciences, Sichuan University, Chengdu, China
| | - Hui Cheng
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, the Fifth Affiliated Hospital of Zhengzhou University
| | - Hong-Lei Li
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, the Fifth Affiliated Hospital of Zhengzhou University
| | - En-Yao Li
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, the Fifth Affiliated Hospital of Zhengzhou University
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Li D, Yuan C, Zhao B, Cai G, Xu Y. LncRNA Kcnq1ot1relieves neuropathic pain through downregulation of Myd88. Int Immunopharmacol 2023; 119:110218. [PMID: 37104915 DOI: 10.1016/j.intimp.2023.110218] [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: 12/09/2022] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 04/29/2023]
Abstract
BACKGROUND Long non-coding RNAs (lncRNAs) have already been documented to become the therapeutic targets for neuropathic pain. Here, this work focused on exploring the specific mechanism underlying Kcnq1 overlapping transcript 1 (kcnq1ot1) in neuropathic pain. METHODS Sciatic nerve chronic constriction injury (CCI) in vivo and LPS-stimulated microglia BV2 cell injury in vitro were adopted to construct neuropathic pain models. Expressions of kcnq1ot1, MyD88, and microglia activation marker Iba-1 were measured. In this study, we carried out fluorescence in-situ Hybridization (FISH) and immunofluorescence for examining Kcnq1ot1 localization within microglial cells in mouse spinal dorsal horn. Subsequently, we evaluated binding between Kcnq1ot1 and Myd88, together with the expressions of IL-1β, IL-6, TNF-α, and Myd88 ubiquitination. RESULTS Kcnq1ot1 levels decreased within CCI mice and LPS-induced BV2 cells. According to the results of FISH and immunofluorescence, Kcnq1ot1 is located in microglia. Overexpression of Kcnq1ot1 suppressed Iba-1, IL-1β, IL-6 together with TNF-α expression. RNA pull-down and RIP assay confirmed that Kcnq1ot1 bound to Myd88. In addition, Kcnq1ot1 overexpression promoted the degradation, enhanced the ubiquitination, and reduced protein level of Myd88. Overexpression of Myd88 eliminated the effects of Kcnq1ot1 overexpression on Iba-1level and production of pro-inflammatory cytokines. Further in vivo results revealed that increased Kcnq1ot1 level alleviated neuropathic pain and myelinated nerve fiber injury of CCI mice. CONCLUSION Kcnq1ot1 downregulated Myd88 protein expression by binding to Myd88 and promoting its ubiquitination, which in turn suppressed microglia activation, pro-inflammatory cytokine production, and relieved neuropathic pain.
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Affiliation(s)
- Da Li
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450052, China.
| | - Chang Yuan
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450052, China
| | - Bingxiao Zhao
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450052, China
| | - Gaige Cai
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450052, China
| | - Ying Xu
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450052, China
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AlOkda A, Van Raamsdonk JM. Evolutionarily Conserved Role of Thioredoxin Systems in Determining Longevity. Antioxidants (Basel) 2023; 12:antiox12040944. [PMID: 37107319 PMCID: PMC10135697 DOI: 10.3390/antiox12040944] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
Thioredoxin and thioredoxin reductase are evolutionarily conserved antioxidant enzymes that protect organisms from oxidative stress. These proteins also play roles in redox signaling and can act as a redox-independent cellular chaperone. In most organisms, there is a cytoplasmic and mitochondrial thioredoxin system. A number of studies have examined the role of thioredoxin and thioredoxin reductase in determining longevity. Disruption of either thioredoxin or thioredoxin reductase is sufficient to shorten lifespan in model organisms including yeast, worms, flies and mice, thereby indicating conservation across species. Similarly, increasing the expression of thioredoxin or thioredoxin reductase can extend longevity in multiple model organisms. In humans, there is an association between a specific genetic variant of thioredoxin reductase and lifespan. Overall, the cytoplasmic and mitochondrial thioredoxin systems are both important for longevity.
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Affiliation(s)
- Abdelrahman AlOkda
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC H3A 2B4, Canada
- Metabolic Disorders and Complications Program, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
| | - Jeremy M Van Raamsdonk
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC H3A 2B4, Canada
- Metabolic Disorders and Complications Program, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
- Brain Repair and Integrative Neuroscience Program, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
- Division of Experimental Medicine, Department of Medicine, McGill University, Montreal, QC H4A 3J1, Canada
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Zhang AN, Li N, Chen ZC, Guo YL, Tian CJ, Cheng DJ, Tang XY, Zhang XY. Amygdalin alleviated TGF-β-induced epithelial-mesenchymal transition in bronchial epithelial cells. Chem Biol Interact 2023; 369:110235. [PMID: 36457260 DOI: 10.1016/j.cbi.2022.110235] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 10/11/2022] [Accepted: 10/21/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Transforming growth factor-beta TGF-β-induced epithelial-mesenchymal transition (EMT) in bronchial epithelial cells contributes to airway wall remodeling in asthma. This study aims to explore the role of amygdalin, an active ingredient in bitter almonds, in TGF-β-induced EMT in bronchial epithelial cells and to elucidate the possible mechanisms underlying its biological effects. METHODS An asthmatic mouse model was established through ovalbumin induction. Primary mouse bronchial epithelial cells and a human bronchial epithelial cell line were incubated with transforming growth factor-beta (TGF-β) to induce EMT, whose phenotype of cells was evaluated by the expressions of EMT markers [alpha-smooth muscle actin (α-SMA), vimentin, and fibronectin] and cell migration capacity. A co-immunoprecipitation assay was performed to assess the ubiquitination of heparanase (HPSE). RESULTS In asthmatic model mice, amygdalin treatment relieved airway wall remodeling and decreased expressions of EMT markers (α-SMA and vimentin). In TGF-β-treated bronchial epithelial cells, amygdalin treatment decreased the mRNA and protein levels of EMT markers (α-SMA, vimentin, and fibronectin) without impairing cell viability. Through the Swiss Target Prediction database, HPSE was screened as a candidate downstream target for amygdalin. HPSE overexpression further promoted TGF-β-induced EMT while the HPSE inhibitor suppressed TGF-β-induced EMT in bronchial epithelial cells. In addition, HPSE overexpression reversed the inhibitory effect of amygdalin on TGF-β-induced EMT in bronchial epithelial cells. The following mechanism exploration revealed that amygdalin downregulated HPSE expression by enhancing ubiquitination. CONCLUSION Our study showed that amygdalin inhibited TGF-β-induced EMT in bronchial epithelial cells and found that the anti-EMT activity of amygdalin might be related to its regulatory effect on HPSE expression.
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Affiliation(s)
- An-Nan Zhang
- Department of Respiratory Disease and Intensive Care, Henan Provincial People's, Hospital, PR China; Department of Respiratory Disease and Intensive Care, People's Hospital Affiliated to Zhengzhou University, PR China
| | - Nan Li
- Department of Respiratory Disease and Intensive Care, Henan Provincial People's, Hospital, PR China; Department of Respiratory Disease and Intensive Care, People's Hospital Affiliated to Zhengzhou University, PR China
| | - Zhuo-Chang Chen
- Department of Respiratory Disease and Intensive Care, Henan Provincial People's, Hospital, PR China; Department of Respiratory Disease and Intensive Care, People's Hospital Affiliated to Zhengzhou University, PR China
| | - Ya-Li Guo
- Department of Respiratory Disease and Intensive Care, Henan Provincial People's, Hospital, PR China; Department of Respiratory Disease and Intensive Care, People's Hospital Affiliated to Zhengzhou University, PR China
| | - Cui-Jie Tian
- Department of Respiratory Disease and Intensive Care, Henan Provincial People's, Hospital, PR China; Department of Respiratory Disease and Intensive Care, People's Hospital Affiliated to Zhengzhou University, PR China
| | - Dong-Jun Cheng
- Department of Respiratory Disease and Intensive Care, Henan Provincial People's, Hospital, PR China; Department of Respiratory Disease and Intensive Care, People's Hospital Affiliated to Zhengzhou University, PR China
| | - Xue-Yi Tang
- Department of Respiratory Disease and Intensive Care, Henan Provincial People's, Hospital, PR China; Department of Respiratory Disease and Intensive Care, People's Hospital Affiliated to Zhengzhou University, PR China
| | - Xiao-Yu Zhang
- Department of Respiratory Disease and Intensive Care, Henan Provincial People's, Hospital, PR China; Department of Respiratory Disease and Intensive Care, People's Hospital Affiliated to Zhengzhou University, PR China.
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6
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Li M, Hasiqiqige, Huan Y, Wang X, Tao M, Jiang T, Xie H, Jisiguleng W, Xing W, Zhu Z, Wang A, He Y. Calycosin ameliorates spinal cord injury by targeting Hsp90 to inhibit oxidative stress and apoptosis of nerve cells. J Chem Neuroanat 2023; 127:102190. [PMID: 36402284 DOI: 10.1016/j.jchemneu.2022.102190] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 11/09/2022] [Accepted: 11/13/2022] [Indexed: 11/18/2022]
Abstract
BACKGROUND Zhenbao pill is effective in protecting against spinal cord injury (SCI). We attempt to explore the characteristics of calycosin (a main monomer of Zhenbao pill) in SCI and its relative mechanism. METHODS The target of calycosin was screened using pharmacological network analysis. The SCI cell model was constructed using hydrogen peroxide (H2O2), and the animal model was developed by compressing spinal cord with a vascular clamp. Flow cytometry was conducted to test reactive oxygen species (ROS) levels and cell apoptosis. Detection of malondialdehyde (MDA) activity and Superoxide dismutase (SOD) activity were performed using relative kits. Heat shock protein 90 (HSP90) was examined using western blot and quantitative real-time PCR. Motor function tests were carried out. The hematoxylin-eosin and Nissl staining were conducted. RESULTS In SCI models, ROS, MDA, and cell apoptosis were elevated, SOD and HSP90 levels were restrained, while calycosin addition reversed the above results. Besides, calycosin application or HSP90 overexpression enhanced phosphorylation of protein kinase B (Akt) but weakened that of apoptosis signal-regulating kinase 1 (ASK1) and p38, while HSP90 inhibitor 17-AAG treatment restrained the above results. Meanwhile, the injection of calycosin improved the motor function in SCI model rats. Furthermore, the pathologic results also clarified the positive effect of calycosin on SCI. CONCLUSION HSP90 was lowly expressed in SCI models. Calycosin alleviated SCI by promoting HSP90 up-regulation and inhibiting oxidative stress and apoptosis of nerve cells.
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Affiliation(s)
- Mingdong Li
- Department of Orthopaedics and Traumatology, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311 Hainan Province, China
| | - Hasiqiqige
- Inner Mongolia innovative Engineering Research Center, Hohhot, 010060 Inner Mongolia, China
| | - Yanqiang Huan
- Department of Spine Surgery, Inner Mongolia People's Hospital, Hohhot, 010017 Inner Mongolia, China
| | - Xiaolei Wang
- Department of Spine Surgery, Inner Mongolia People's Hospital, Hohhot, 010017 Inner Mongolia, China
| | - Mingkai Tao
- Department of Spine Surgery, Inner Mongolia People's Hospital, Hohhot, 010017 Inner Mongolia, China
| | - Tianqi Jiang
- Department of Spine Surgery, Inner Mongolia People's Hospital, Hohhot, 010017 Inner Mongolia, China
| | - Hongbin Xie
- Department of Spine Surgery, Inner Mongolia People's Hospital, Hohhot, 010017 Inner Mongolia, China
| | - Wu Jisiguleng
- Department of Spine Surgery, Inner Mongolia People's Hospital, Hohhot, 010017 Inner Mongolia, China
| | - Wei Xing
- Department of Spine Surgery, Inner Mongolia People's Hospital, Hohhot, 010017 Inner Mongolia, China
| | - Zhibo Zhu
- Department of Spine Surgery, Inner Mongolia People's Hospital, Hohhot, 010017 Inner Mongolia, China
| | - Aitao Wang
- Department of Anesthesiology, Inner Mongolia People's Hospital, Hohhot, 010017 Inner Mongolia, China.
| | - Yongxiong He
- Department of Spine Surgery, The Second Affiliated Hospital of Hainan Medical University, Haikou, 570216 Hainan Province, China.
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Gu D, Nan Q, Miao Y, Yang H, Li M, Ye Y, Miao J. KT2 alleviates ulcerative colitis by reducing Th17 cell differentiation through the miR-302c-5p/STAT3 axis. Eur J Cell Biol 2022; 101:151223. [PMID: 35405463 DOI: 10.1016/j.ejcb.2022.151223] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 03/27/2022] [Accepted: 04/01/2022] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND The abnormal differentiation of Th17 cells aggravates ulcerative colitis (UC). Antimicrobial peptides (AMPs) exert pivotal protection functions against UC. KT2 is a cationic AMP that mediates colon cancer development. However, KT2's function in UC remains unclear. METHODS The UC mouse model was induced by administering 2.5% dextran sulfate sodium, and the mice were given an enema of KT2. KT2's function in UC and Th17 cell differentiation in vivo was evaluated through various molecular experiments. The KT2's function in Th17 cell differentiation in vitro was evaluated by the proportion of CD4+ IL-17+ T cells, IL-17 levels, and RORγt expression levels. Meanwhile, the mechanism was assessed through quantitative real-time PCR, various loss-of-function assays, and dual-luciferase reporter gene assay. RESULTS KT2 restrained Th17 cell differentiation in both in vivo and in vitro UC models and slowed the UC process. KT2 elevated miR-302c-5p expression, as well as restrained Th17 cell differentiation by increasing miR-302c-5p. Meanwhile, miR-302c-5p interacted with the signal transducer and activator of transcription 3 (STAT3) and negatively regulated its expression. Furthermore, our data revealed that KT2 restrained the activation of STAT3 by elevating miR-302c-5p, thereby inhibiting Th17 cell differentiation. CONCLUSION KT2 alleviates UC by repressing Th17 cell differentiation through the miR-302c-5p/STAT3 axis.
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Affiliation(s)
- Dandan Gu
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, Yunnan 650032, China
| | - Qiong Nan
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, Yunnan 650032, China
| | - Yinglei Miao
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, Yunnan 650032, China
| | - Hailong Yang
- School of Basic Medical Sciences, Kunming Medical University, Kunming, Yunnan, China
| | - Maojuan Li
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, Yunnan 650032, China
| | - Yan Ye
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, Yunnan 650032, China
| | - Jiarong Miao
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, Yunnan 650032, China.
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Zhou HJ, Wang LQ, Zhan RY, Zheng XJ, Zheng JS. lncRNA MEG3 restrained the M1 polarization of microglia in acute spinal cord injury through the HuR/A20/NF-κB axis. Brain Pathol 2022; 32:e13070. [PMID: 35338543 PMCID: PMC9425005 DOI: 10.1111/bpa.13070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 12/31/2021] [Accepted: 03/09/2022] [Indexed: 11/28/2022] Open
Abstract
The M1 polarization of microglia and neuroinflammation restrict the treatment of acute spinal cord injury (ASCI), and long non‐coding ribonucleic acid (lncRNA) maternally expressed gene 3 (MEG3) expression is lessened in ASCI. However, the function and mechanism of lncRNA MEG3 in the M1 polarization of microglia and neuroinflammation in ASCI are unclear. The expressions of lncRNA MEG3 in ASCI mouse spinal cord tissues and lipopolysaccharide (LPS)‐treated primary microglia and BV2 cells were quantified through a quantitative real‐time polymerase chain reaction. In‐vitro assays were conducted to explore the function of lncRNA MEG3 in the M1 polarization of microglia and neuroinflammation in ASCI. RNA degradation, RNA immunoprecipitation, RNA pull‐down, cycloheximide‐chase, and ubiquitination analyses were carried out to probe into the mechanism of lncRNA MEG3 in the M1 polarization of microglia and neuroinflammation in ASCI. The lncRNA MEG3 expression was lessened in the ASCI mouse spinal cord tissues and LPS‐treated primary microglia and BV2 cells, and the overexpression of lncRNA MEG3 restrained the M1 polarization of microglia and the neuroinflammation by regulating the NF‐κB signaling pathway. For the investigation of the potential mechanism of such, the overexpression of lncRNA MEG3 restrained the M1 polarization of microglia through the HuR/A20/NF‐κB axis and boosted the motor function recovery and neuroinflammation relief in the mice with SCI. The overexpression of lncRNA MEG3 restrained the M1 polarization of microglia through the HuR/A20/NF‐κB axis.
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Affiliation(s)
- Heng-Jun Zhou
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Li-Qing Wang
- Department of Anesthesiology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Ren-Ya Zhan
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Xiu-Jue Zheng
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Jie-Sheng Zheng
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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Wu X, Wang Z, Wang J, Tian X, Cao G, Gu Y, Shao F, Yan T. Exosomes Secreted by Mesenchymal Stem Cells Induce Immune Tolerance to Mouse Kidney Transplantation via Transporting LncRNA DANCR. Inflammation 2022; 45:460-475. [PMID: 34596768 DOI: 10.1007/s10753-021-01561-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 09/02/2021] [Accepted: 09/06/2021] [Indexed: 11/30/2022]
Abstract
Mesenchymal stem cells induce kidney transplant tolerance by increasing regulatory T (Treg) cells. Bone marrow mesenchymal stem cell exosomes (BMMSC-Ex) promote Treg cell differentiation. Long non-coding RNA differentiation antagonizing non-protein coding RNA (DANCR) is expressed in BMMSCs and can be encapsulated in exosomes. We aimed to explore the role of DANCR in BMMSC-Ex in immune tolerance after kidney transplantation and related mechanism. The isogenic/allograft kidney transplantation mouse model was established, and levels of serum creatinine (SCr) were determined. Hematoxylin-eosin staining was conducted to detect the inflammation, and immunohistochemistry was performed to detect the infiltration of CD4+ T cells. Levels of IFN-γ, IL-17, and IL-2 were examined by ELISA. Flow cytometry was conducted to determine Treg cells. In the allograft group, the inflammatory response was severe, CD4+ T cell infiltration, SCr levels, and plasma rejection-related factors were up-regulated, while injection of BMMSC-Ex reversed the results. BMMSC-Ex increased Treg cells in kidney transplantation mice. Interference with DANCR reversed the promoting effect of BMMSC-Ex on Treg cell differentiation. DANCR bound to SIRT1, promoted ubiquitination and accelerated its degradation. The injection of BMMSC-Ex (after interference with DANCR) promoted SIRT1 levels, inflammatory response, CD4+ T cell infiltration, SCr levels, and plasma rejection related factors' expression, while Treg cells were decreased. LncRNA DANCR in BMMSC-Ex promoted Treg cell differentiation and induced immune tolerance of kidney transplantation by down-regulating SIRT1 expression in CD4+ T cells.
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Affiliation(s)
- Xiaoqiang Wu
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China
| | - Zhiwei Wang
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China
| | - Junpeng Wang
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China
| | - Xiangyong Tian
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China
| | - Guanghui Cao
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China
| | - Yue Gu
- Department of Nephrology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Zhengzhou, 450003, Henan, China
| | - Fengmin Shao
- Department of Nephrology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Zhengzhou, 450003, Henan, China
| | - Tianzhong Yan
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China.
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Yan W, Wang L, Chen Z, Gu C, Chen C, Liu X, Ye Q. Knockdown of lncRNA HAGLR promotes Treg cell differentiation through increasing the RUNX3 level in dermatomyositis. J Mol Histol 2022; 53:413-421. [DOI: 10.1007/s10735-021-10051-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 12/07/2021] [Indexed: 01/14/2023]
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11
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Wu L, Zhan Q, Liu P, Zheng H, Liu M, Min J, Xie L, Wu W. LncRNA TCONS_00145741 Knockdown Prevents Thrombin-Induced M1 Differentiation of Microglia in Intracerebral Hemorrhage by Enhancing the Interaction Between DUSP6 and JNK. Front Cell Dev Biol 2022; 9:684842. [PMID: 35127692 PMCID: PMC8809462 DOI: 10.3389/fcell.2021.684842] [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: 03/25/2021] [Accepted: 12/06/2021] [Indexed: 11/13/2022] Open
Abstract
Background: The differentiation of microglia from M1 to M2 exerts a pivotal role in the aggression of intracerebral hemorrhage (ICH), and long non-coding RNAs (lncRNAs) are associated with the differentiation of microglia. However, the underlying mechanism had not been fully clarified. Methods: The expression profile of lncRNAs in thrombin-induced primary microglia was analyzed by RNA sequencing. Under thrombin treatment, the effect of lncRNA TCONS_00145741 on the differentiation of microglia was determined by immunofluorescence staining, quantitative real-time PCR, and Western blot. The potential mechanism and related signaling pathways of TCONS_00145741 in the M1 and M2 differentiation of microglia in ICH were assessed by Gene Ontology analysis, flow cytometry, RNA pull-down, RNA Immunoprecipitation, and RNA fluorescence in situ hybridization followed by immunofluorescence analysis. Results: LncRNA TCONS_00145741 expression was elevated in the thrombin-induced primary microglia, and the interference with TCONS_00145741 restrained the M1 differentiation of microglia and facilitated the M2 differentiation under thrombin treatment. The interference with TCONS_00145741 restrained the activation of the JNK pathway in microglia under thrombin treatment and repressed the JNK phosphorylation levels by enhancing the interaction between DUSP6 and JNK. In vivo experiments further illustrated that the interference with TCONS_00145741 alleviated ICH. Conclusion: LncRNA TCONS_00145741 knockdown prevented thrombin-induced M1 differentiation of microglia in ICH by enhancing the interaction between DUSP6 and JNK. This study might provide a promising target for the clinical treatment of ICH.
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12
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Zhao P, Fu H, Cheng H, Zheng R, Yuan D, Yang J, Li S, Li E, Li L. Acupuncture at ST36 Alleviates the Behavioral Disorder of Autistic Rats by Inhibiting TXNIP-Mediated Activation of NLRP3. J Neuropathol Exp Neurol 2022; 81:127-134. [PMID: 35015875 DOI: 10.1093/jnen/nlab132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Autism is a common neurodevelopmental disorder that severely affects patients' quality of life. We aimed to investigate whether acupuncture at Zusanli (ST36) could alleviate the behavior disorder of autistic rats by inhibiting thioredoxin-interacting protein (TXNIP)-mediated activation of NLRP3. An autism model was induced by intraperitoneal injection of pregnant rats with valproic acid (VPA). The pups' behaviors were analyzed using hot plate, open field, Morris water maze, and 3-chamber social interaction tests. Nissl staining was used to visualize neurons in prefrontal cortex. Levels of TXNIP, NLRP3, interleukin (IL)-1β, and caspase were determined by Western blot or quantitative real-time PCR. After ST36 acupuncture, pain sensitivity, autonomous activity, sociability index, sociability preference index, and learning and memory were improved in the autism model rats. Levels of TXNIP, NLRP3, IL-1β, and caspase 1 were decreased after acupuncture. Interference with TXNIP alleviated the behavior disorders and inhibited NLRP3, caspase 1, and IL-1β levels. In summary, ST36 acupuncture reduced TXNIP expression, inhibited the activation of the NLRP3 inflammasome, and alleviated the behavior disorder related to the prefrontal cortex of the autistic rats. These results point to a potential mechanism for acupuncture-induced improvement of autistic behavioral disorders.
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Affiliation(s)
- Pengju Zhao
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Hongguang Fu
- Institute of Health Engineering, Zhengzhou Health Vocational College, Zhengzhou, China
| | - Hui Cheng
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ruijuan Zheng
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Dan Yuan
- Institute of Health Engineering, Zhengzhou Health Vocational College, Zhengzhou, China
| | - Jianquan Yang
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Sheng Li
- College of Life Sciences, Sichuan University, Chengdu, China
| | - Enyao Li
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Liguo Li
- Institute of Health Engineering, Zhengzhou Health Vocational College, Zhengzhou, China
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13
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Hou J, Li H, Xue C, Ma J. Lidocaine relieves spinal cord ischemia-reperfusion injury via long non-coding RNA MIAT-mediated Notch1 downregulation. J Biochem 2022; 171:411-420. [PMID: 34981118 DOI: 10.1093/jb/mvab150] [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: 04/08/2021] [Accepted: 12/15/2021] [Indexed: 11/14/2022] Open
Abstract
Microglial activation and inflammatory response play a critical role in spinal cord ischemia-reperfusion injury (SCIRI). This study aimed to investigate whether lidocaine relieves SCIRI via modulating MIAT-mediated Notch1 downregulation. Mouse SCIRI was induced by the obstruction of the aortic arch. Lidocaine was injected after reperfusion. Microglial activation and inflammatory response were assessed by Iba1, interleukin 1 beta (IL-1β), and tumor necrosis factor alpha (TNF-α) levels. The interaction between MIAT and Notch1 was assessed by RNA pull-down and RNA immunoprecipitation assays. Lidocaine treatment relieved SCIRI by reducing Iba1 and serum TNF-α and IL-1β levels. After lidocaine treatment, MIAT expression was elevated in lipopolysaccharide- (LPS-) induced BV2 cells. The interference of MIAT and the overexpression of MIAT and Notch1 restored TNF-α and IL-1β levels in supernatants. Notch1 protein was existent in MIAT-pull-down compounds, and the expression of MIAT was markedly elevated in Notch1-immunoprecipitants. The overexpression of MIAT markedly promoted the degradation of Notch1 and increased the level of ubiquitin-bound Notch1 complex. The therapeutic effect of lidocaine on SCIRI mice could be reversed by adeno-associated virus-mediated MIAT knockdown. In conclusion, lidocaine treatment relieved SCIRI via inhibiting microglial activation and reducing the inflammatory response. The molecular mechanism was partly through MIAT-mediated Notch1 downregulation.
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Affiliation(s)
- Junkai Hou
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University
| | - Huixin Li
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University
| | - Changjiang Xue
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University
| | - Junqi Ma
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University
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Zhang BF, Wu ZH, Deng J, Jin HJ, Chen WB, Zhang S, Liu XJ, Wang WT, Zheng XT. M 6A methylation-mediated elevation of SM22α inhibits the proliferation and migration of vascular smooth muscle cells and ameliorates intimal hyperplasia in type 2 diabetes mellitus. Biol Chem 2021; 403:317-329. [PMID: 34882999 DOI: 10.1515/hsz-2021-0296] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 11/18/2021] [Indexed: 01/02/2023]
Abstract
Abnormal proliferation of vascular smooth muscle cells (VSMCs) induced by insulin resistance facilitates intimal hyperplasia of type 2 diabetes mellitus (T2DM) and N6-methyladenosine (m6A) methylation modification mediates the VSMC proliferation. This study aimed to reveal the m6A methylation modification regulatory mechanism. In this study, m6A demethylase FTO was elevated in insulin-treated VSMCs and T2DM mice with intimal injury. Functionally, FTO knockdown elevated m6A methylation level and further restrained VSMC proliferation and migration induced by insulin. Mechanistically, FTO knockdown elevated Smooth muscle 22 alpha (SM22α) expression and m6A-binding protein IGF2BP2 enhanced SM22α mRNA stability by recognizing and binding to m6A methylation modified mRNA. In vivo studies confirmed that the elevated m6A modification level of SM22α mRNA mitigated intimal hyperplasia in T2DM mice. Conclusively, m6A methylation-mediated elevation of SM22α restrained VSMC proliferation and migration and ameliorated intimal hyperplasia in T2DM.
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Affiliation(s)
- Bao-Fu Zhang
- Department of Vascular Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China
| | - Zi-Heng Wu
- Department of Vascular Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Jie Deng
- Department of Vascular Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China
| | - Hao-Jie Jin
- Department of Vascular Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China
| | - Wei-Biao Chen
- Department of Vascular Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China
| | - Sai Zhang
- Institute of Ischemia-Reperfusion Injury, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Xiu-Jie Liu
- Institute of Ischemia-Reperfusion Injury, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Wan-Tie Wang
- Institute of Ischemia-Reperfusion Injury, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Xiang-Tao Zheng
- Department of Vascular Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China
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Song J, Zhao D, Sun G, Yang J, Lv Z, Jiao B. PTPRM methylation induced by FN1 promotes the development of glioblastoma by activating STAT3 signalling. PHARMACEUTICAL BIOLOGY 2021; 59:904-911. [PMID: 34225581 PMCID: PMC8259858 DOI: 10.1080/13880209.2021.1944220] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
CONTEXT The phosphorylation of signal transducer and activator of transcription protein 3 (STAT3) is up-regulated in glioblastoma (GBM) cells and is regulated by protein tyrosine phosphatase receptor type M (PTPRM). Fibronectin-1 (FN1) is also reported to be up-regulated in GBM. OBJECTIVE We explored the role of FN1-induced PTPRM methylation in GBM. MATERIALS AND METHODS The lentivirus particles of oe-PTPRM, sh-PTPRM, oe-FN1, sh-FN1, or their negative controls (NSCs) were transfected into GBM cells with or without stattic (0.5 μM, 24 h) or 5-aza (1 μM, 0, 2, 4 h) treatments. Methylation-specific PCR was performed to detect PTPRM methylation levels. RESULTS PTPRM was down-regulated (0.373 ± 0.124- and 0.455 ± 0.109-fold), FN1 and p-STAT3 were up-regulated (p < 0.001) in A172 and U87 MG cells as compared to NSCs. Overexpressing PTPRM inhibited STAT3 phosphorylation. Interfering with PTPRM increased colony numbers in A172 and U-87 MG cells (2.253 ± 0.111- and 2.043 ± 0.19-fold), and stattic reduced them. Cell viability was reduced after treatment with 5-aza in A172 and U-87 MG cells (p < 0.05). P-STAT3 was down-regulated after 5-aza treatment. Overexpressing FN1 decreased PTPRM levels (p < 0.001), knockdown of FN1 decreased PTPRM methylation and inhibited STAT3 phosphorylation. Overexpressing FN1 increased cell viability (1.497 ± 0.114- and 1.460 ± 0.151-fold), and stattic or 5-aza reversed such effects (p < 0.05). DISCUSSION AND CONCLUSIONS The up-regulation of FN1 reduced PTPRM by increasing its methylation, resulting in an increase of STAT3 phosphorylation and promoting GBM cell proliferation. Interfering with FN1 may be a potential therapeutic target for GBM.
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Affiliation(s)
- Jian Song
- Department of Neurosurgery, The Second Affiliated Hospital, Hebei Medical University, Shijiazhuang, China
- CONTACT Jian Song Department of Neurosurgery, The Second Affiliated Hospital, Hebei Medical University, No.215, Heping West Road, Shijiazhuang050011, China
| | - Di Zhao
- Department of Neurosurgery, The First Affiliated Hospital, Hebei Medical University, Shijiazhuang, China
| | - Guozhu Sun
- Department of Neurosurgery, The Second Affiliated Hospital, Hebei Medical University, Shijiazhuang, China
| | - Jiankai Yang
- Department of Neurosurgery, The Second Affiliated Hospital, Hebei Medical University, Shijiazhuang, China
| | - Zhongqiang Lv
- Department of Neurosurgery, The Second Affiliated Hospital, Hebei Medical University, Shijiazhuang, China
| | - Baohua Jiao
- Department of Neurosurgery, The Second Affiliated Hospital, Hebei Medical University, Shijiazhuang, China
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Ding Y, Zhou DY, Yu H, Zhu T, Guo F, He Y, Guo XL, Lin YJ, Liu YJ, Yu YS. Upregulation of lncRNA NONRATG019935.2 suppresses the p53-mediated apoptosis of renal tubular epithelial cells in septic acute kidney injury. Cell Death Dis 2021; 12:771. [PMID: 34719669 PMCID: PMC8558325 DOI: 10.1038/s41419-021-03953-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 05/05/2021] [Accepted: 05/06/2021] [Indexed: 12/11/2022]
Abstract
Although increasing evidence has confirmed that the apoptosis of renal tubular epithelial cells (RTECs) is a crucial contributor to the onset and development of septic acute kidney injury (AKI), the pathological mechanism by which RTEC apoptosis is upregulated during septic AKI is not entirely clear. In this study, a rat model of septic AKI was induced by a cecal ligation puncture procedure or lipopolysaccharide (LPS) injection. Four differentially expressed long noncoding RNAs (DE-Lncs) in the rat model of septic AKI were determined using RNA-sequencing and verified by qRT-PCR. Among the four DE-Lncs, the expression level of lncRNA NONRATG019935.2 (9935) exhibited the most significant reduction in both septic AKI rats and LPS-treated NRK-52E cells (a rat RTEC line). The overexpression of 9935 suppressed cell apoptosis and p53 protein level in LPS-treated NRK-52E cells, and retarded septic AKI development in the rat model of septic AKI. Mechanistically, 9935 decreased the human antigen R (HuR)-mediated Tp53 mRNA stability by limiting the combination of HuR and the 3'UTR region of Tp53 mRNA in RTECs. The overexpression of HuR abrogated the inhibitory effect of pcDNA-9935 on the LPS-induced apoptosis of NRK-52E and rat primary RTECs. In conclusion, 9935 exerts its role in septic AKI by suppressing the p53-mediated apoptosis of RTECs, and this essential role of 9935 relies on its destructive effect on HuR-mediated Tp53 mRNA stability.
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Affiliation(s)
- Ying Ding
- Department of Intensive Care Unit, Sir Run Run Shaw Hospital Xiasha Campus, Zhejiang University School of Medicine, 310018, Hangzhou, Zhejiang, China.
| | - Dao-Yang Zhou
- Department of Emergency, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 310016, Hangzhou, Zhejiang, China
| | - Hong Yu
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 310016, Hangzhou, Zhejiang, China
| | - Tao Zhu
- Department of Intensive Care Unit, Sir Run Run Shaw Hospital Xiasha Campus, Zhejiang University School of Medicine, 310018, Hangzhou, Zhejiang, China
| | - Feng Guo
- Department of Intensive Care Unit, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 310016, Hangzhou, Zhejiang, China
| | - Yang He
- Department of Emergency, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 310016, Hangzhou, Zhejiang, China
| | - Xiu-Liu Guo
- Department of Intensive Care Unit, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 310016, Hangzhou, Zhejiang, China
| | - Yong-Jun Lin
- Department of Intensive Care Unit, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 310016, Hangzhou, Zhejiang, China
| | - Yu-Jiao Liu
- Department of Intensive Care Unit, Sir Run Run Shaw Hospital Xiasha Campus, Zhejiang University School of Medicine, 310018, Hangzhou, Zhejiang, China
| | - Yun-Song Yu
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 310016, Hangzhou, Zhejiang, China
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Xin L, Wu Y, Liu C, Zeng F, Wang JL, Wu DZ, Wu JP, Yue ZQ, Gan JH, Lu H, Yuan YW, Zhou LQ. Exosome-mediated transfer of lncRNA HCG18 promotes M2 macrophage polarization in gastric cancer. Mol Immunol 2021; 140:196-205. [PMID: 34735868 DOI: 10.1016/j.molimm.2021.10.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/09/2021] [Accepted: 10/11/2021] [Indexed: 12/18/2022]
Abstract
BACKGROUND Gastric cancer (GC) derived exosomes (Exos) aggravate GC development by facilitating M2 macrophage polarization and long non-coding RNA (lncRNA) HCG18 was highly expressed in GC. This study aimed to investigate whether the exosomal lncRNA HCG18 regulated the M2 macrophage polarization in GC and the possible mechanism. METHODS The isolated GC cells (GCCs)-Exos were identified using transmission electron microscopy, Nanoparticle Tracking Analysis and Western blot. The GCCs-Exos function was verified by enzyme-linked immunosorbent assay and flow cytometry. Meanwhile, the exosomal lncRNA HCG18 function was determined using thein vitro assays. Furthermore, the underlying mechanism of the exosomal lncRNA HCG18 that regulated M2 macrophage polarization in GC was investigated using dual-luciferase reporter gene assay and RNA pull-down. RESULTS After the validation of GCCs-Exos, the GCCs-Exos facilitated the M2 macrophage polarization. The in vitro assays confirmed that the exosomal lncRNA HCG18 positively regulated the M2 macrophage polarization. Mechanistically, lncRNA HCG18 bound to miR-875-3p, miR-875-3p bound to KLF4. Furthermore, GCCs-exosomal lncRNA HCG18 elevated the KLF4 expression by decreasing miR-875-3p in macrophages to facilitate M2 macrophage polarization, thus alleviating GC. The in vivo assays clarified that the GCCs-exosomal lncRNA HCG18 restrained the tumor growth of GC induced by M2 macrophages. CONCLUSION GCCs-exosomal lncRNA HCG18 elevated KLF4 expression by decreasing miR-875-3p in macrophages to facilitate the M2 macrophage polarization.
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Affiliation(s)
- Lin Xin
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China.
| | - You Wu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Chuan Liu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Fei Zeng
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Jin-Liang Wang
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Deng-Zhong Wu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Ji-Ping Wu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Zhen-Qi Yue
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Jin-Heng Gan
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Hao Lu
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Yi-Wu Yuan
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Li-Qiang Zhou
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
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Wang Z, Xu H, Cheng F, Zhang J, Feng Y, Liu D, Shang W, Feng G. Donor BMSC-derived small extracellular vesicles relieve acute rejection post-renal allograft through transmitting Loc108349490 to dendritic cells. Aging Cell 2021; 20:e13461. [PMID: 34499402 PMCID: PMC8520728 DOI: 10.1111/acel.13461] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 07/19/2021] [Accepted: 08/06/2021] [Indexed: 12/24/2022] Open
Abstract
Bone marrow-derived mesenchymal stem cell (BMSC)-derived small extracellular vesicles (sEVs) are potent candidates for the suppression of acute rejection post-renal allograft and have been reported to halt dendritic cells (DCs) maturation. However, whether BMSC-derived sEVs mitigate acute rejection post-renal allograft by targeting DCs is still unclear. In this study, donor BMSC-derived sEVs (sEVs) relieved the inflammatory response and suppressed mature DCs (mDCs) location in kidney grafts, and increased regulatory T (Treg) cell population in the spleens of the rats that underwent kidney allograft. In lipopolysaccharide (LPS)-stimulated immature DCs (imDCs), sEVs suppressed the maturation and migration of DCs and inactivated toll-like receptor 4 (TLR4) signaling. Compared with LPS-treated imDCs, imDCs treated with LPS+sEVs promoted CD4+ T cells differentiated toward Treg cells. Subsequently, we found that Loc108349490, a long non-coding RNA (lncRNA) abundant in sEVs, mediated the inhibitory effect of sEVs on DC maturation and migration by promoting TLR4 ubiquitination. In rats that underwent an allograft, Loc108349490 deficiency weakened the therapeutic effect of sEVs on acute rejection. The present study firstly found that sEVs alleviated acute rejection post-renal allograft by transferring lncRNA to DCs and screened out the functional lncRNA loaded in sEVs was Loc108349490.
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Affiliation(s)
- Zhi‐gang Wang
- Department of Kidney TransplantationThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
| | - Hong‐en Xu
- Precision Medicine Center of Zhengzhou UniversityAcademy of Medical SciencesZhengzhou UniversityZhengzhouChina
| | - Fu‐min Cheng
- Department of Kidney TransplantationThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
| | - Jie Zhang
- Department of Kidney TransplantationThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
| | - Yong‐hua Feng
- Department of Kidney TransplantationThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
| | - Dan‐hua Liu
- Precision Medicine Center of Zhengzhou UniversityAcademy of Medical SciencesZhengzhou UniversityZhengzhouChina
| | - Wen‐jun Shang
- Department of Kidney TransplantationThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
| | - Gui‐wen Feng
- Department of Kidney TransplantationThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
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Yu L, Zhang L, Jiang Z, Yu B. Decreasing lncRNA PVT1 causes Treg/Th17 imbalance via NOTCH signaling in immune thrombocytopenia. ACTA ACUST UNITED AC 2021; 26:734-740. [PMID: 34555308 DOI: 10.1080/16078454.2021.1974200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Objectives: Immune thrombocytopenia (ITP) is an autoimmune disease. T helper cell 17 (Th17) cells are increased in peripheral blood of ITP patients. NOTCH signaling is involved in Th17 cell differentiation and function. Besides, lncRNA Plasmacytoma variant translocation 1 (PVT1) was decreased in experimental autoimmune encephalomyelitis, and overexpressing PVT1 inhibited Th17 cell differentiation. Here, we aimed to investigate the effect of lncRNA PVT1 on ITP and its related mechanism.Methods: The number of Th17 cells and Treg cells was carried out using flow cytometry. PVT1 levels were detected by quantitative real-time PCR. Interleukin-17 (IL-17) levels and transforming growth factor-β (TGF-β) levels were detected by enzyme-linked immunosorbent assay. Protein levels of retinoid acid-related orphan receptor γ t (RORγt), forkhead box P3 (Foxp3), and NOTCH1 were carried out by western blot. NOTCH1 ubiquitylation was detected by ubiquitination assay.Results: PVT1 was down-regulated and Th17 cells were up-regulated in ITP patients. Overexpression of PVT1 decreased the number of Th17 cells, and also decreased the levels of IL-17, RORγt, and NOTCH1. Besides, PVT1 could bind to NOTCH1 and mediated NOTCH1 degradation by increasing its ubiquitination. Additionally, excessive expression of PVT1 could increase the levels of PVT1, reduce the amount of Th17 cells, as well as the levels of IL-17, RORγt, and NOTCH1, while co-overexpressing NOTCH1 reversed the results.Conclusion: PVT1 was down-regulated in ITP patients. Overexpressing PVT1 might reduce Th17 cell differentiation by down-regulating NOTCH1, and further alleviated the development of ITP.
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Affiliation(s)
- Ling Yu
- Department of Blood Transfusion, Jinhua People's Hospital, Jinhua, People's Republic of China
| | - Liqin Zhang
- Department of Laboratory, Jinhua People's Hospital, Jinhua, People's Republic of China
| | - Zhiyong Jiang
- Department of hematopathology, Jinhua People's Hospital, Jinhua, People's Republic of China
| | - Beiwei Yu
- Department of Laboratory, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
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Pan J, Luo X, Zhao S, Li J, Jiang Z. miR-340-5p mediates the therapeutic effect of mesenchymal stem cells on corneal neovascularization. Graefes Arch Clin Exp Ophthalmol 2021; 260:497-507. [PMID: 34495369 DOI: 10.1007/s00417-021-05394-8] [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: 04/12/2021] [Revised: 08/09/2021] [Accepted: 08/23/2021] [Indexed: 10/20/2022] Open
Abstract
BACKGROUND Our previous study revealed that mesenchymal stem cells (MSCs) inhibited angiogenesis via miRNA-mediated repression of prospero homeobox 1 (PROX1). This study aimed to verify whether miR-340-5p participates in the therapeutic effect of MSCs on corneal neovascularization (CNV) via repressing PROX1 and epithelial membrane protein 2 (EMP2). MATERIALS AND METHODS The rat CNV model was established by corneal alkali burn. The binding relationship between miR-340-5p and 3'-untranslational regions (3'UTRs) of EMP2 and PROX1 was confirmed using dual-luciferase reporter assay. After culturing corneal epithelial cells (CECs) using MSC supernatants, the vascular endothelial growth factor (VEGF) level in CEC supernatants and the CEC viability were detected. The role of miR-340-5p in the therapeutic effect of MSC on CNV was determined via lentivirus-mediated miR-340-5p intervention in vivo. RESULTS The expression of miR-340-5p was reduced and EMP2 and PROX1 were increased in CNV corneal tissues. The lentivirus-mediated overexpression of miR-340-5p inhibited the expressions of EMP2 and PROX1. The dual-luciferase reporter assay confirmed that miR-340-5p could bind with the 3'UTRs of EMP2 and PROX1. miR-340-5p was enriched in MSC supernatants and the culture of CECs using MSC supernatants increased the miR-340-5p expression in CECs. After being cultured in miR-340-5p-knocking down MSC supernatants, the expressions of EMP2 and PROX1 were increased, and the VEGF level and CEC viability were restored. The in vivo experiments also indicated that the therapeutic effect of MSCs was mediated by miR-340-5p. CONCLUSIONS miR-340-5p mediates the therapeutic effect of MSCs on CNV via binding and repressing the expressions of EMP2 and PROX1.
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Affiliation(s)
- Jian Pan
- Department of Ophthalmology, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Ouhai District, Wenzhou, 325000, Zhejiang, China
| | - Xu Luo
- Burn and Wound Healing Center, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Ouhai District, Wenzhou, 325000, Zhejiang, China.,Wound Repair Department, The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou People's Hospital, No. 2 Zhongloudi Street, Kecheng District, Quzhou, 324000, Zhejiang, China
| | - Shujue Zhao
- Department of Pathology, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Ouhai District, Wenzhou, 325000, Zhejiang, China
| | - Jianmin Li
- Department of Pathology, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Ouhai District, Wenzhou, 325000, Zhejiang, China
| | - Zipei Jiang
- Department of Ophthalmology, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Street, Ouhai District, Wenzhou, 325000, Zhejiang, China.
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21
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Tian X, Liu Y, Wang H, Zhang J, Xie L, Huo Y, Ma W, Li H, Chen X, Shi P. The role of miR-199b-3p in regulating Nrf2 pathway by dihydromyricetin to alleviate septic acute kidney injury. Free Radic Res 2021; 55:842-852. [PMID: 34490833 DOI: 10.1080/10715762.2021.1962008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The pathophysiology of septic acute kidney injury (AKI) is very complex and the fatality is high. Nrf2 is crucial for septic AKI, and dihydromyricetin (DMY) has a protective effect on LPS-induced AKI. We aimed to explore whether DMY could affect Nrf2 pathway by regulating miR-199b-3p and played a protective role in septic AKI. The mouse model was induced by cecal ligation and puncture (CLP) and the cell model was stimulated by LPS. Enzyme-linked immunosorbent assay was conducted to examine MDA, SOD, LDH, GSH, TNF-α, kidney injury molecule 1 (KIM-1), and IL-6 levels. The pathological changes were observed by hematoxylin-eosin staining. The targeted relationship between miR-199b-3p and Nrf2 was verified by a dual-luciferase reporter assay. Levels of SOD, GSH, NQO-1, Nrf2, and HO-1 were decreased, MDA, LDH, TNF-α, IL-6, and KIM-1, and miR-199b-3p were increased in the CLP group and LPS-induced HK-2 cells, while the effect was reversed after DMY treatment. There existed renal tubule cell edema and necrosis, inflammatory cell infiltration in the CLP group, the situation was partially improved by DMY. MiR-199b-3p bound to Nrf2. Nrf2 levels were increased, TNF-α, IL-6, and KIM-1 were decreased after transfected with miR-199b-3p inhibitor, these effects were reversed when co-transfected with si-Nrf2. TNF-α, IL-6, KIM-1, and miR-199b-3p levels were increased; Nrf2, NQO-1, and HO-1 levels were decreased in the LPS + DMY + mimics-miR group. MiR-199b-3p was increased in septic AKI models, DMY might alleviate septic AKI by regulating miR-199b-3p to affect the Nrf2 pathway.
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Affiliation(s)
- Xiyan Tian
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yufeng Liu
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Huaili Wang
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jianjiang Zhang
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Lei Xie
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yufeng Huo
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Wei Ma
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Haiying Li
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiaoxin Chen
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Peipei Shi
- Department of Pediatrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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22
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Gu X, Shi Y, Dong M, Jiang L, Yang J, Liu Z. Exosomal transfer of tumor-associated macrophage-derived hsa_circ_0001610 reduces radiosensitivity in endometrial cancer. Cell Death Dis 2021; 12:818. [PMID: 34462422 PMCID: PMC8405633 DOI: 10.1038/s41419-021-04087-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 07/22/2021] [Accepted: 07/27/2021] [Indexed: 02/07/2023]
Abstract
The occurrence of radioresistance is a clinical obstacle to endometrial cancer (EC) treatment and induces tumor relapse. In this study, we found that tumor-associated macrophages (TAMs) enriched in EC specimens were determined to present an M2-like phenotype. In vitro, the coculture of M2-polarized macrophages significantly downregulated the radiosensitivity of EC cells by releasing exosomes. Hsa_circ_0001610 was found to be abundant in exosomes derived from M2-polarized macrophages (EXOs), and hsa_circ_0001610 knockdown eliminated the reduction effect of EXOs on the radiosensitivity of EC cells. The following mechanism research revealed that hsa_circ_0001610 functioned as the competing endogenous RNA of miR-139-5p, thereby upregulating cyclin B1 expression, which is a vital pusher of radioresistance in several types of cancer by regulating the cell cycle. Hsa_circ_0001610 overexpression reduced the radiosensitivity of EC cells, which was then reversed by miR-139-5p overexpression. In vivo, the promotion effect of EXOs on xenograft tumor growth in nude mice treated with irradiation was further reinforced after hsa_circ_0001610 overexpression. In conclusion, TAM-derived exosomes transferred hsa_circ_0001610 to EC cells, and the overexpressed hsa_circ_0001610 in EC cells released cyclin B1 expression through adsorbing miR-139-5p, thereby weakening the radiosensitivity of EC cells.
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Affiliation(s)
- Xiaobin Gu
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Rd, Zhengzhou, 450000, Henan, People's Republic of China.
| | - Yonggang Shi
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Rd, Zhengzhou, 450000, Henan, People's Republic of China
| | - Meilian Dong
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Rd, Zhengzhou, 450000, Henan, People's Republic of China
| | - Li Jiang
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Rd, Zhengzhou, 450000, Henan, People's Republic of China
| | - Jing Yang
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Rd, Zhengzhou, 450000, Henan, People's Republic of China
| | - Zheyan Liu
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Rd, Zhengzhou, 450000, Henan, People's Republic of China
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23
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Zheng SR, Huang QD, Zheng ZH, Zhang ZT, Guo GL. circGFRA1 affects the sensitivity of triple-negative breast cancer cells to paclitaxel via the miR-361-5p/TLR4 pathway. J Biochem 2021; 169:601-611. [PMID: 33481008 DOI: 10.1093/jb/mvaa148] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 12/10/2020] [Indexed: 01/14/2023] Open
Abstract
In recent years, the role of circular RNAs (circRNAs) in tumours has attracted widespread attention. Some circRNAs have been reported to play a role in triple-negative breast cancer (TNBC). However, circRNAs have rarely been reported in terms of TNBC resistance. This study aimed to clarify that circGFRA1 affects the sensitivity of TNBC cells to paclitaxel (PTX) by the miR-361-5p/TLR4 pathway. Compared with the non-PTX-resistant TNBC cell line MDA-MB-231, the expression of circGFRA1 in the PTX-resistant TNBC cell line MDA-MB-231.PR was significantly increased. The small hairpin RNA-mediated circGFRA1 knockdown inhibited the resistance of TNBC cells to PTX. RNA pull-down assay and luciferase reporter gene assay confirmed the binding between circGFRA1 and miR-361-5p and between miR-361-5p and TLR4. It has been proven that circGFRA1 knockdown can inhibit the resistance of TNBC cells to PTX by promoting the expression of miR-361-5p, and subsequently reduce the expression of TLR4.
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Affiliation(s)
- Shu-Rong Zheng
- Department of General Surgery, Beijing Key Laboratory of Cancer Invasion and Metastasis Research & National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, 95 Yong-an Road, Xi-Cheng District, Beijing 100050, China.,Department of Breast and Thyroid Surgery, The First Affiliated Hospital of Wenzhou Medical University, Ouhai District, Wenzhou, Zhejiang 325000, China
| | - Qi-di Huang
- Department of Breast and Thyroid Surgery, The First Affiliated Hospital of Wenzhou Medical University, Ouhai District, Wenzhou, Zhejiang 325000, China
| | - Zhi-Hai Zheng
- Department of General Surgery, Beijing Key Laboratory of Cancer Invasion and Metastasis Research & National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, 95 Yong-an Road, Xi-Cheng District, Beijing 100050, China.,Department of Colorectal and Anal Surgery, The First Affiliated Hospital of Wenzhou Medical University, Ouhai District, Wenzhou, Zhejiang 325000, China
| | - Zhong-Tao Zhang
- Department of General Surgery, Beijing Key Laboratory of Cancer Invasion and Metastasis Research & National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, 95 Yong-an Road, Xi-Cheng District, Beijing 100050, China
| | - Gui-Long Guo
- Department of Colorectal and Anal Surgery, The First Affiliated Hospital of Wenzhou Medical University, Ouhai District, Wenzhou, Zhejiang 325000, China
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24
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Zhu X, Li S, Huang C, Huang G, Xu J. LncRNA CRNDE inhibits cardiomyocytes apoptosis by YAP1 in myocardial ischaemia/reperfusion injury. Autoimmunity 2021; 54:204-212. [PMID: 33988471 DOI: 10.1080/08916934.2021.1913580] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Cardiomyocytes apoptosis is the basic pathological process of myocardial ischaemia/reperfusion (MI/R) injury, so inhibiting apoptosis of cardiomyocytes can effectively improve MI/R injury. Long non-coding RNA colorectal neoplasia differentially expressed (lncRNA CRNDE) can inhibit cell apoptosis, but its specific role in MI/R injury has not been studied. The aim of this study is to explore the specific effect of lncRNA CRNDE on cardiomyocytes apoptosis. METHODS MI/R model in vivo and hypoxia/re-oxygenation (H/R) model in vitro were constructed. Apoptotic levels were assessed by TUNEL staining assay. QRT-PCR was used to validate lncRNA CRNDE level in myocardial tissues and HL-1 cells. The protein expressions of YAP1, Bcl-2 and cleaved caspase-3 were detected by western blot analysis. Flow cytometry was used to determine the apoptosis rate of cardiomyocytes. RIP assay was used to detect the interaction between lncRNA CRNDE and YAP1. RESULTS The extent of cardiomyocytes apoptosis was significantly increased, and the levels of lncRNA CRNDE, YAP1 and Bcl-2 were down-regulated, while cleaved caspase-3 expression was up-regulated in MI/R mice and H/R-treated HL-1 cells. The expressions of YAP1 and Bcl-2 were decreased, while the expression of cleaved caspase-3 was increased after the knockdown of lncRNA CRNDE. Furthermore, lncRNA CRNDE could bind to YAP1 and regulated the protein level of YAP1 by ubiquitination and proteasomal degradation pathway. After transfection of Si-YAP1 in the H/R-treated HL-1 cells transfected with pc-DNA CRNDE, the protein level of Bcl-2 was decreased, while cleaved caspase-3 expression and the apoptosis rate were increased. CONCLUSION Our study suggested that lncRNA CRNDE could regulate YAP1 level by ubiquitination and proteasomal degradation pathway, thus inhibiting cardiomyocytes apoptosis in MI/R injury.
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Affiliation(s)
- Xiaohua Zhu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Shuiqi Li
- Department of Dermatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Chen Huang
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Gongcheng Huang
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jing Xu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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25
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Geng H, Su Y, Huang R, Fan M, Li X, Lu X, Sheng H. Specific protein 1 inhibitor mithramycin A protects cardiomyocytes from myocardial infarction via interacting with PARP. In Vitro Cell Dev Biol Anim 2021; 57:315-323. [PMID: 33580416 DOI: 10.1007/s11626-021-00543-z] [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: 10/19/2020] [Accepted: 01/05/2021] [Indexed: 10/22/2022]
Abstract
Specific protein 1 (SP1) might act as a critical transcription regulator in myocardial infarction (MI), but little evidence about its function in regulating cardiac apoptosis, a major cause of MI development, has been revealed. This study tried to investigate the role of SP1 in MI and its interaction with poly-ADP-ribose polymerase (PARP)-1 by using SP1 inhibitor, mithramycin A (mithA). Primary mouse cardiomyocytes and commercial mouse cardiomyocytes were subjected to mithA treatment under hypoxia conditions, while cell viability, Nix promoter activity, and its expression were detected correspondingly. PARP overexpression and knockdown were conducted, respectively, in mithA-treated and SP1-overexpressing cells. Co-immunoprecipitation was used to verify the interaction between PARP and SP1. For in vivo experiments, mithA administration was performed after the injections of adenovirus for PARP overexpression, and then, MI introduction was carried out. Infarct size and lactate dehydrogenase level were measured to assess MI injury. SP1 inhibitor mithA attenuated hypoxia-induced decrease of cell viability and Nix transcriptional activation, which could be inhibited by PARP overexpression. Knockdown of PARP prevented SP1-induced transcription of Nix and cell viability change, and PARP showed direct interaction with SP1. Furthermore, mithA administration reduced MI injuries, while PARP overexpression could suppress the improvement. The cardioprotective role of SP1 inhibitor mithA was demonstrated here expanding the role of SP1 in MI development involving hypoxia-induced cardiac apoptosis. Moreover, PARP acted as a transcriptional coactivator in Nix transcription involving its interaction with SP1.
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Affiliation(s)
- Haihua Geng
- Department of Cardiology, Affiliated Hospital of Nantong University, No. 20 Xisi Rd, Nantong, 226001, Jiangsu, China
| | - Yamin Su
- Department of Cardiology, Affiliated Hospital of Nantong University, No. 20 Xisi Rd, Nantong, 226001, Jiangsu, China
| | - Rong Huang
- Department of Cardiology, Affiliated Hospital of Nantong University, No. 20 Xisi Rd, Nantong, 226001, Jiangsu, China
| | - Mengkang Fan
- Department of Cardiology, Affiliated Hospital of Nantong University, No. 20 Xisi Rd, Nantong, 226001, Jiangsu, China
| | - Xiaofei Li
- Department of Cardiology, Affiliated Hospital of Nantong University, No. 20 Xisi Rd, Nantong, 226001, Jiangsu, China
| | - Xiaochen Lu
- Department of Cardiology, Affiliated Hospital of Nantong University, No. 20 Xisi Rd, Nantong, 226001, Jiangsu, China
| | - Hongzhuan Sheng
- Department of Cardiology, Affiliated Hospital of Nantong University, No. 20 Xisi Rd, Nantong, 226001, Jiangsu, China.
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26
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Li H, Xu X, Wang D, Zhang Y, Chen J, Li B, Su S, Wei L, You H, Fang Y, Wang Y, Liu Y. Hypermethylation-mediated downregulation of long non-coding RNA MEG3 inhibits osteogenic differentiation of bone marrow mesenchymal stem cells and promotes pediatric aplastic anemia. Int Immunopharmacol 2021; 93:107292. [PMID: 33529912 DOI: 10.1016/j.intimp.2020.107292] [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: 06/29/2020] [Revised: 12/02/2020] [Accepted: 12/08/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND The reduced osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) is the typical characteristics of pediatric aplastic anemia (AA) pathogenesis. Long non-coding RNA MEG3 is reported to promote osteogenic differentiation of BMSCs via inducing BMP4 expression. OBJECTIVE This study aims to investigate the mechanism of DNMT1/MEG3/BMP4 pathway in osteogenic differentiation of BMSCs in pediatric AA. METHODS BMSCs were isolated and purified from bone marrows of pediatric AA patients (n = 5) and non-AA patients (n = 5). The expression of DNMT1, MEG3, and BMP4 in isolated BMSCs was detected using quantitative real-time PCR and western blot analysis. Osteogenic differentiation was determined using Alizarin red staining. The methylation of MEG3 promoter and the interaction between DNMT1 and MEG3 promoter were detected using methylation-specific PCR and chromatin immunoprecipitation assay, respectively. RESULTS Lowly expressed MEG3 and BMP4 and highly expressed DNMT1 were observed in BMSCs of pediatric AA patients. The overexpression of MEG3 promoted osteogenic differentiation of BMSCs. Luciferase reporter assay showed that MEG3 overexpression increased transcriptional activity of BMP4. The inhibitor of methylation, 5-azacytidine, suppressed DNMT1 expression and reduced methylation of MEG3 promoter. Overexpression of DNMT1 increased the binding between DNMT1 and MEG3 promoter. The simultaneous overexpression of DNMT1 and MEG3 restored the inhibition of osteogenic differentiation caused by DNMT1 overexpression alone. CONCLUSIONS Our findings indicated that DNMT1 mediated the hypermethylation of MEG3 promoter in BMSCs, and DNMT1/MEG3/BMP4 pathway modulated osteogenic differentiation of BMSCs in pediatric AA.
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Affiliation(s)
- Huanhuan Li
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Xueju Xu
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Dao Wang
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Yuan Zhang
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Jiao Chen
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Bai Li
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Shufang Su
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Linlin Wei
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Hongliang You
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Yingqi Fang
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Yingchao Wang
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Yufeng Liu
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.
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Shi C, Zheng W, Wang J. lncRNA-CRNDE regulates BMSC chondrogenic differentiation and promotes cartilage repair in osteoarthritis through SIRT1/SOX9. Mol Cell Biochem 2021; 476:1881-1890. [PMID: 33479807 DOI: 10.1007/s11010-020-04047-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 12/26/2020] [Indexed: 12/19/2022]
Abstract
Osteoarthritis (OA) is the most common chronic and degenerative joint disease. Although traditional OA medications can partially relieve pain, these medications cannot completely cure OA. Therefore, it is particularly important to find an effective treatment for OA. This study explored the function of long non-coding RNA (lncRNA)-colorectal neoplasia differentially expressed gene (CRNDE) in the chondrogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) and the underlying molecular mechanism, aiming to develop a new treatment method for osteoarthritis. BMSCs were isolated from rat bone marrow using the gradient centrifugation method. And BMSC chondrogenic differentiation was induced with chondrogenic medium. The expression of lncRNA-CRNDE was detected by quantitative real-time polymerase chain reaction (qRT-PCR). Silent information regulator factor 2-related enzyme 1 (SIRT1) and cartilage marker genes Aggrecan and collagen 2 (α1) protein expression were researched using western blot. Alcian blue staining was employed to examine the content of cartilage matrix proteoglycan glycosaminoglycan (GAG). The interaction between lncRNA-CRNDE and SIRT1 was detected by RNA pull-down and RNA immunoprecipitation (RIP) assay. Ubiquitination experiments were performed to measure the ubiquitination level of SIRT1. The combination between SMAD ubiquitination regulatory factor 2 (SMURF2) and SIRT1, as well as SRY-related high-mobility-group box 9 (SOX9) and collagen 2 (α1) promoter, was detected by Co-immunoprecipitation or ChIP. With the prolongation of induction time, the expression of lncRNA-CRNDE, SIRT1, cartilage marker genes Aggrecan and collagen 2 (α1) in BMSC osteogenic differentiation was gradually increased. Also, the content of cartilage matrix proteoglycan GAG was gradually elevated with the extension of the induction time. Further increase in the expression of SIRT1, cartilage marker genes Aggrecan and collagen 2 (α1) by overexpression of lncRNA-CRNDE also indicated elevated GAG content. RNA pull-down and RIP assay confirmed the binding between lncRNA-CRNDE and SIRT1. qRT-PCR and western blot showed that interference with lncRNA-CRNDE significantly inhibited the protein expression of SIRT1. BMSCs transfected with si-CRNDE increased ubiquitination levels of SIRT1 mediated by the E3 ligase SMURF2, leading to the reduced protein stability of SIRT1. However, overexpression of lncRNA-CRNDE increased the binding ability of SOX9 and collagen 2 (α1) promoter, which was reversed by the simultaneous transfection of CRNDE overexpression (pcDNA-CRNDE) and SIRT1 small interfering RNA (si-SIRT1). lncRNA-CRNDE regulates BMSC chondrogenic differentiation to promote cartilage repair in osteoarthritis through SIRT1/SOX9.
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Affiliation(s)
- Chengdi Shi
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, 325027, China. .,Key Laboratory of Orthopaedics of Zhejiang Province, Wenzhou, China.
| | - Wenhao Zheng
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, 325027, China.,Key Laboratory of Orthopaedics of Zhejiang Province, Wenzhou, China
| | - Jinwu Wang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, 325027, China.,Key Laboratory of Orthopaedics of Zhejiang Province, Wenzhou, China
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Ikeno Y. Thioredoxin - a magic bullet or a double-edged sword for mammalian aging? AGING PATHOBIOLOGY AND THERAPEUTICS 2021; 3:17-19. [PMID: 35368730 DOI: 10.31491/apt.2021.06.056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
After the discovery of thioredoxin as a reductant for many important enzymes in the early 1960s, biological roles of thioredoxin in pathophysiology have been examined using various species and experimental models, e.g., yeast, invertebrates, rodents, and humans. A large number of studies demonstrated that thioredoxin plays an essential role to maintain a reduced cellular environment and possesses many beneficial effects by maintaining cellular/organ functions and against diseases. However, an important question that remains to be answered is whether thioredoxin could attenuate aging by reducing oxidative damage and changing cellular redox state, which alters redox-sensitive signaling pathways. To address this important question, we have been conducting aging studies with transgenic and knockout mice, and transgenic rats to examine whether the upregulation or downregulation of thioredoxin alters lifespan and age-related pathology. Aging studies conducted by our laboratory and others revealed that the roles of thioredoxin on pathophysiology seem to be more complex than our initial expectations as a potential magic bullet to solve the issues with age. Recent studies indicate that thioredoxin could have both beneficial and potentially deleterious effects on aging and age-related diseases. To critically evaluate the biological effects of thioredoxin on aging and age-related diseases, studies require further consideration to assess additional factors, e.g. levels of thioredoxin in different cellular compartments, different effects in each cell/tissue/organ, physiological aging vs. pathology, and/or at different life stages.
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Affiliation(s)
- Yuji Ikeno
- Barshop Institute for Longevity and Aging Studies, San Antonio, TX 78229, USA.,Department of Pathology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA.,Geriatric Research and Education Center, Audie L. Murphy VA Hospital South Texas Veterans Health Care System, San Antonio, TX 78229, USA
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Roman MG, Flores LC, Cunningham GM, Cheng C, Allen C, Hubbard GB, Bai Y, Saunders TL, Ikeno Y. Thioredoxin and aging: What have we learned from the survival studies? AGING PATHOBIOLOGY AND THERAPEUTICS 2020; 2:126-133. [PMID: 35493763 DOI: 10.31491/apt.2020.09.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Our laboratory has conducted the first systematic survival studies to examine the biological effects of the antioxidant protein thioredoxin (Trx) on aging and age-related pathology. Our studies with C57BL/6 mice overexpressing Trx1 [Tg(act-TRX1)+/0 and Tg(TXN)+/0) demonstrated a slight extension in early lifespan compared to wild-type (WT) mice; however, no significant effects were observed in the later part of life. Overexpression of Trx2 in male C57BL/6 mice [Tg(TXN2)+/0] demonstrated a slightly extended lifespan compared to WT mice. The pathology results from two lines of Trx1 transgenic mice showed a slightly higher incidence of age-related neoplastic diseases compared to WT mice, and a slight increase in the severity of lymphoma, a major neoplastic disease, was observed in Trx2 transgenic mice. Together these studies indicate that Trx overexpression in one compartment of the cell (cytosol or mitochondria alone) has marginal beneficial effects on lifespan. On the other hand, down-regulation of Trx in either the cytosol (Trx1KO) or mitochondria (Trx2KO) showed no significant changes in lifespan compared to WT mice, despite several changes in pathophysiology of these knockout mice. When we examined the synergetic effects of overexpressing Trx1 and Trx2, TXNTg x TXN2Tg mice showed a significantly shorter lifespan with accelerated cancer development compared to WT mice. These results suggest that synergetic effects of Trx overexpression in both the cytosol and mitochondria on aging are deleterious and the development of age-related cancer is accelerated. On the other hand, we have recently found that down-regulation of Trx in both the cytosol and mitochondria in Trx1KO x Trx2KO mice has beneficial effects on aging. The results generated from our lab along with our ongoing study using Trx1KO x Trx2KO mice could elucidate the key pathways (i.e., apoptosis and autophagy) that prevent accumulation of damaged cells and genomic instability leading to reduced cancer formation.
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Affiliation(s)
- Madeline G Roman
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Lisa C Flores
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Geneva M Cunningham
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Christie Cheng
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Colton Allen
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Gene B Hubbard
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.,Department of Pathology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Yidong Bai
- Department of Cell Systems & Anatomy, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Thomas L Saunders
- Transgenic Animal Model Core, University of Michigan, Ann Arbor, MI, USA
| | - Yuji Ikeno
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.,Department of Pathology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.,Geriatric Research and Education Clinical Center, Audie L. Murphy VA Hospital, South Texas Veterans Health Care System, San Antonio, TX, USA
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