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Dong ZL, Jiao X, Wang ZG, Yuan K, Yang YQ, Wang Y, Li YT, Wang TC, Kan TY, Wang J, Tao HR. D-mannose alleviates intervertebral disc degeneration through glutamine metabolism. Mil Med Res 2024; 11:28. [PMID: 38711073 PMCID: PMC11071241 DOI: 10.1186/s40779-024-00529-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Accepted: 04/11/2024] [Indexed: 05/08/2024] Open
Abstract
BACKGROUND Intervertebral disc degeneration (IVDD) is a multifaceted condition characterized by heterogeneity, wherein the balance between catabolism and anabolism in the extracellular matrix of nucleus pulposus (NP) cells plays a central role. Presently, the available treatments primarily focus on relieving symptoms associated with IVDD without offering an effective cure targeting its underlying pathophysiological processes. D-mannose (referred to as mannose) has demonstrated anti-catabolic properties in various diseases. Nevertheless, its therapeutic potential in IVDD has yet to be explored. METHODS The study began with optimizing the mannose concentration for restoring NP cells. Transcriptomic analyses were employed to identify the mediators influenced by mannose, with the thioredoxin-interacting protein (Txnip) gene showing the most significant differences. Subsequently, small interfering RNA (siRNA) technology was used to demonstrate that Txnip is the key gene through which mannose exerts its effects. Techniques such as colocalization analysis, molecular docking, and overexpression assays further confirmed the direct regulatory relationship between mannose and TXNIP. To elucidate the mechanism of action of mannose, metabolomics techniques were employed to pinpoint glutamine as a core metabolite affected by mannose. Next, various methods, including integrated omics data and the Gene Expression Omnibus (GEO) database, were used to validate the one-way pathway through which TXNIP regulates glutamine. Finally, the therapeutic effect of mannose on IVDD was validated, elucidating the mechanistic role of TXNIP in glutamine metabolism in both intradiscal and orally treated rats. RESULTS In both in vivo and in vitro experiments, it was discovered that mannose has potent efficacy in alleviating IVDD by inhibiting catabolism. From a mechanistic standpoint, it was shown that mannose exerts its anti-catabolic effects by directly targeting the transcription factor max-like protein X-interacting protein (MondoA), resulting in the upregulation of TXNIP. This upregulation, in turn, inhibits glutamine metabolism, ultimately accomplishing its anti-catabolic effects by suppressing the mitogen-activated protein kinase (MAPK) pathway. More importantly, in vivo experiments have further demonstrated that compared with intradiscal injections, oral administration of mannose at safe concentrations can achieve effective therapeutic outcomes. CONCLUSIONS In summary, through integrated multiomics analysis, including both in vivo and in vitro experiments, this study demonstrated that mannose primarily exerts its anti-catabolic effects on IVDD through the TXNIP-glutamine axis. These findings provide strong evidence supporting the potential of the use of mannose in clinical applications for alleviating IVDD. Compared to existing clinically invasive or pain-relieving therapies for IVDD, the oral administration of mannose has characteristics that are more advantageous for clinical IVDD treatment.
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Affiliation(s)
- Zheng-Lin Dong
- Department of Orthopedics, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Xin Jiao
- Department of Orthopedics, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Zeng-Guang Wang
- Department of Orthopedics, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Kai Yuan
- Department of Orthopedics, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yi-Qi Yang
- Department of Orthopedics, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yao Wang
- Department of Orthopedics, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yun-Tao Li
- Department of Orthopedics, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Tian-Chang Wang
- Department of Orthopedics, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Tian-You Kan
- Department of Orthopedics, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Jian Wang
- School of Medicine, Shanghai University, Shanghai, 200444, China.
| | - Hai-Rong Tao
- Department of Orthopedics, Shanghai Key Laboratory of Orthopedic Implant, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.
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Lu YY, Cao M, Li F, Tian M, Ren H, Chi Q, Huang Q. Atmospheric PM 2.5 induce autophagy and autophagic flux blockage in HUVEC cells via ROS/TXNIP signaling: Important role of metal components. J Hazard Mater 2023; 445:130623. [PMID: 37056006 DOI: 10.1016/j.jhazmat.2022.130623] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 12/15/2022] [Accepted: 12/15/2022] [Indexed: 06/19/2023]
Abstract
Autophagy was involved in vascular endothelial injury caused by PM2.5, which aggravated the pathogenesis of cardiovascular diseases. However, major toxic components and underlying mechanism responsible for PM2.5-induced autophagy remain unclear. In this study, the effects of water-extracted PM2.5 (WE-PM2.5) on autophagy in human umbilical vein endothelial cells (HUVEC) were studied. Our results showed WE-PM2.5 promoted autophagosome initiation and formation, meanwhile, lysosomal function was impaired, which further caused autophagic flux blockage in HUVEC cells. Furthermore, removal of metals alleviated WE-PM2.5-induced autophagic flux blockage, while the artificial metal mixture reproduced the WE-PM2.5 response. Mechanistically, ROS regulated autophagy-related proteins evidenced by BECN1, LC3B and p62 expression reversed by NAC pretreatment in WE-PM2.5-exposed cells. WE-PM2.5 also increased TXNIP expression mediated by ROS; moreover, knockdown of TXNIP in WE-PM2.5-exposed cells decreased BECN1 and LC3B expression, but had little effects on the expression of p62, CTSB, and CTSD, indicating WE-PM2.5-induced TXNIP was involved in autophagosome initiation and formation rather than autophagic degradation. Collectively, WE-PM2.5-induced ROS not only promoted autophagosome initiation and formation, but also inhibited autophagic degradation. However, as the downstream molecule of ROS, TXNIP was only involved in autophagosome initiation and formation. Importantly, WE-PM2.5-bound metals were largely responsible for autophagic flux blockage in HUVEC cells.
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Affiliation(s)
- Yan-Yang Lu
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Meiyi Cao
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; College of Environmental and Safety Engineering, Fuzhou University, Fuzhou 10386, China
| | - Fuping Li
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Meiping Tian
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Hongyun Ren
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Qiaoqiao Chi
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Qingyu Huang
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
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Yokoyama A, Suzuki S, Okamoto K, Sugawara A. The physiological and pathophysiological roles of carbohydrate response element binding protein in the kidney. Endocr J 2022; 69:605-612. [PMID: 35474028 DOI: 10.1507/endocrj.ej22-0083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Glucose is not only the energy fuel for most cells, but also the signaling molecule which affects gene expression via carbohydrate response element binding protein (ChREBP), a Mondo family transcription factor. In response to high glucose conditions, ChREBP regulates glycolytic and lipogenic genes by binding to carbohydrate response elements (ChoRE) in the regulatory region of its target genes, thus elucidating the role of ChREBP for converting excessively ingested carbohydrates to fatty acids as an energy storage in lipogenic tissues such as the liver and adipose tissue. While the pathophysiological roles of ChREBP for fatty liver and obesity in these tissues are well known, much of the physiological and pathophysiological roles of ChREBP in other tissues such as the kidney remains unclear despite its high levels of expression in them. This review will thus highlight the roles of ChREBP in the kidney and briefly introduce the latest research results that have been reported so far.
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Affiliation(s)
- Atsushi Yokoyama
- Department of Molecular Endocrinology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Susumu Suzuki
- Department of Molecular Endocrinology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Koji Okamoto
- Division of Nephrology, Endocrinology, and Vascular Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan
| | - Akira Sugawara
- Department of Molecular Endocrinology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
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Wang J, Wang XJ, Zhang Y, Shi WJ, Lei ZD, Jiao XY. TXNIP knockout improves cardiac function after myocardial infarction by promoting angiogenesis and reducing cardiomyocyte apoptosis. Cardiovasc Diagn Ther 2022; 12:289-304. [PMID: 35800356 PMCID: PMC9253171 DOI: 10.21037/cdt-21-732] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 04/02/2022] [Indexed: 10/19/2023]
Abstract
BACKGROUND Myocardial infarction (MI) is a common cause of death. Thioredoxin-interacting protein (TXNIP) expression increases after MI, and it exerts a negative regulatory effect on cardiac function after MI. Our study aimed to investigate the specific regulatory mechanism of TXNIP on angiogenesis and cardiomyocyte apoptosis after MI. METHODS The TXNIP gene knock-in (TXNIP-KI) and knock-out (TXNIP-KO) mice were generated, respectively. Eight-week-old male TXNIP-KO, TXNIP-KI, and wild type (WT) mice were subjected to MI by permanent ligation of the left anterior descending artery. Cardiomyocyte apoptosis was detected by TUNEL assay on the 4th post-surgery day. The expressions of TXNIP, hypoxia-inducible factor-1α (HIF-1α), vascular endothelial growth factor (VEGF), phosphorylated protein kinase B (p-AKT), p-AMP-activated protein kinase (p-AMPK), cleaved caspase-3, and caspase-3 were detected by Western blot. Quantitative real-time PCR was performed to detect the expression of TXNIP, HIF-1α, VEGF, prolyl hydroxylase (PHD) 1, and factor inhibiting HIF (FIH). In addition, the superoxide dismutase (SOD) activity and malondialdehyde (MDA) level in each group were also measured. On day 7 after MI, the hearts of sacrificed animals were analyzed by immunohistochemistry to assess CD31 expression and determine the density of angiogenesis. One month after treatment, the cardiac functional and structural changes were determined by echocardiography and the level of myocardial fibrosis was observed by Masson staining. RESULTS Compared with WT mice, TXNIP-KO mice had a significantly improved cardiac functional recovery after MI, and the proportion of myocardial fibrosis area was dramatically reduced, cardiomyocyte apoptosis was decreased, and angiogenesis was significantly increased; TXNIP-KI mice reversed in these changes. The expression of HIF-1α, p-AKT, and p-AMPK increased after MI in TXNIP-KO mice, and the mRNA expression of PHD 1 and FIH decreased. TXNIP-KI mice reversed in these changes. CONCLUSIONS After MI, TXNIP down-regulated the level of HIF-1α and VEGF, reduced the number of angiogenesis, increased cardiomyocyte apoptosis, and ultimately led to a poor prognosis of ischemic myocardium. TXNIP was a protein with negative effects after MI and was expected to be a target for the prevention and treatment of MI.
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Affiliation(s)
- Jin Wang
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Xue-Jiao Wang
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Yan Zhang
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
- Department of Foreign Languages, Changzhi Medical College, Changzhi, China
| | - Wen-Juan Shi
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Zhan-Dong Lei
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Xiang-Ying Jiao
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
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Yamazaki M, Yamada H, Munetsuna E, Maeda K, Ando Y, Mizuno G, Fujii R, Tsuboi Y, Ohashi K, Ishikawa H, Hashimoto S, Hamajima N, Suzuki K. DNA methylation level of the gene encoding thioredoxin-interacting protein in peripheral blood cells is associated with metabolic syndrome in the Japanese general population. Endocr J 2022; 69:319-326. [PMID: 34645728 DOI: 10.1507/endocrj.ej21-0339] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Metabolic syndrome (MetS) is cluster of metabolic diseases, including abdominal obesity, hyperglycemia, high blood pressure, and dyslipidemia, that directly escalate the risk of type 2 diabetes, heart disease, and stroke. Thioredoxin-interacting protein (TXNIP) is a binding protein for thioredoxin, a molecule that is a key inhibitor of cellular oxidation, and thus regulates the cellular redox state. Epigenetic alteration of the TXNIP-encoding locus has been associated with components of MetS. In the present study, we sought to determine whether the level of TXNIP methylation in blood is associated with MetS in the general Japanese population. DNA was extracted from the peripheral blood cells of 37 subjects with and 392 subjects without MetS. The level of TXNIP methylation at cg19693031 was assessed by the bisulfite-pyrosequencing method. We observed that TXNIP methylation levels were lower in MetS subjects (median 74.9%, range 71.7-78.4%) than in non-MetS subjects (median 77.7%, range 74.4-80.5%; p = 0.0024). Calculation of the confounding factor-adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for hypomethylation revealed that subjects with MetS exhibited significantly higher ORs for hypomethylation than did those without MetS (OR, 2.92; 95% CI, 1.33-6.62; p = 0.009). Our findings indicated that lower levels of TXNIP methylation are associated with MetS in the general Japanese population. Altered levels of DNA methylation in TXNIP at cg19693031 might play an important role in the pathogenesis of MetS.
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Affiliation(s)
- Mirai Yamazaki
- Department of Medical Technology, Kagawa Prefectural University of Health Sciences, Takamatsu 761-0123, Japan
| | - Hiroya Yamada
- Department of Hygiene, Fujita Health University School of Medicine, Toyoake 470-1192, Japan
| | - Eiji Munetsuna
- Department of Biochemistry, Fujita Health University School of Medicine, Toyoake 470-1192, Japan
| | - Keisuke Maeda
- Department of Clinical Physiology, Fujita Health University School of Medical Sciences, Toyoake 470-1192, Japan
| | - Yoshitaka Ando
- Department of Biomedical and Analytical Sciences, Fujita Health University School of Medical Sciences, Toyoake 470-1192, Japan
| | - Genki Mizuno
- Department of Joint Research Laboratory of Clinical Medicine, Fujita Health University Hospital, Toyoake 470-1192, Japan
| | - Ryosuke Fujii
- Department of Preventive Medical Sciences, Fujita Health University School of Medical Sciences, Toyoake 470-1192, Japan
| | - Yoshiki Tsuboi
- Department of Preventive Medical Sciences, Fujita Health University School of Medical Sciences, Toyoake 470-1192, Japan
| | - Koji Ohashi
- Department of Biomedical and Analytical Sciences, Fujita Health University School of Medical Sciences, Toyoake 470-1192, Japan
| | - Hiroaki Ishikawa
- Department of Biomedical and Analytical Sciences, Fujita Health University School of Medical Sciences, Toyoake 470-1192, Japan
| | - Shuji Hashimoto
- Department of Hygiene, Fujita Health University School of Medicine, Toyoake 470-1192, Japan
| | - Nobuyuki Hamajima
- Department of Healthcare Administration, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Koji Suzuki
- Department of Preventive Medical Sciences, Fujita Health University School of Medical Sciences, Toyoake 470-1192, Japan
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Wang T, Wang J, Sun T, Li Y. Amelioration of Juglanin against LPS-Induced Activation of NLRP3 Inflammasome in Chondrocytes Mediated by SIRT1. Inflammation 2021; 44:1119-1129. [PMID: 33398541 DOI: 10.1007/s10753-020-01407-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 12/04/2020] [Accepted: 12/18/2020] [Indexed: 12/21/2022]
Abstract
Arthritis is characterized by irreversible joint destruction and presents a global health burden. Natural alternatives to synthetic drugs have been gaining popularity for their safety and effectiveness. Juglanin has demonstrated a range of anti-inflammatory effects in various tissues and cell types. However, the pharmacological function of Juglanin in arthritis and chondrocytes has been little studied. ATDC5 cells were treated with 1 μg/mL lipopolysaccharide (LPS) in the presence or absence of juglanin (2.5, 5 μM) for 24 h. The effects of juglanin on cellular nucleotide-binding domain leucin-rich repeat receptor 3 (NLRP3) inflammasome complex and endproduct interleukin 1β (IL-1β) and interleukin (IL-18) were assessed by reverse transcription-polymerase chain reaction (RT-PCR), enzyme-linked immunosorbent assay (ELISA), and Western blot experiments. The oxidative stress was measured by super oxide dismutase (SOD) activity and NADPH oxidase 4 (NOX4) expression. The dependent effect of juglanin on silent information regulator 2 homolog 1 (SIRT1) was evaluated by siRNA knockdown approach. Juglanin significantly reduced cellular oxidative stress by downregulating NOX4 expression production and rescuing the decreased activity of total SOD induced by LPS. Juglanin inhibited the activation of the TxNIP/NLRP3/ASC/caspase-1 axis, and decreased production of IL-1β and IL-18. Moreover, juglanin rescued the LPS-induced decrease in SIRT1 expression. SIRT1 silencing abolished the anti-NLRP3 inflammasome effect of juglanin, indicating that the effects of juglanin are dependent on its amelioration on SIRT1 expression. Juglanin possesses an anti-inflammatory and anti-ROS capacity in chondrocytes, and this study provides available evidence that juglanin may be of use in the treatment of arthritis.
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Affiliation(s)
- Tingting Wang
- Department of Geriatrics, The First Hospital of China Medical University, Shenyang, 110001, Liaoning, China
| | - Jiakai Wang
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, No. 155 Nanjingbei Street, Heping District, Shenyang, 110001, Liaoning, China
| | - Tao Sun
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, No. 155 Nanjingbei Street, Heping District, Shenyang, 110001, Liaoning, China
| | - Yishuo Li
- Department of Rheumatology and Immunology, The First Hospital of China Medical University, No. 155 Nanjingbei Street, Heping District, Shenyang, 110001, Liaoning, China.
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Pan Q, Guo K, Xue M, Tu Q. Estrogen protects neuroblastoma cell from amyloid-β 42 (Aβ42)-induced apoptosis via TXNIP/TRX axis and AMPK signaling. Neurochem Int 2020; 135:104685. [PMID: 31931042 DOI: 10.1016/j.neuint.2020.104685] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 12/20/2019] [Accepted: 01/08/2020] [Indexed: 12/26/2022]
Abstract
Alzheimer's disease (AD), a massive challenge to global health, is featured with the extracellular plaques made up of amyloid-β 42 (Aβ42) and the intracellular neurofibrillary pathology composed of the microtubule-associated protein tau. Women seem to have a higher vulnerability to AD. In the present study, we identified Thioredoxin-interacting protein (TXNIP) as a specifically highly-expressed gene in the hippocampus in female AD patients by bioinformatics analysis. Consistently, in the hippocampus in female AD mice, apoptosis and TXNIP expression were enhanced while TRX expression was suppressed. In Aβ42-stimulated SH-SY5Y cells, the administration of estradiol significantly rescued Aβ42-suppressed cell viability and protein level of TRX while inhibited Aβ42-induced increases in ROS production, cell apoptosis, ΔΨm, and the protein levels of PERK, IREα, and TXNIP, further confirming the potential role of estrogen in AD progression and the involvement of TXNIP/TRX axis. Furthermore, the protective effects of estradiol against Aβ42-induced in vitro neurotoxicity on SH-SY5Y cells could be significantly reversed by AMPK inhibitor, Compound C, indicating that estradiol could improve Aβ42-induced AD via TXNIP/TRX and AMPK signaling. In summary, we demonstrated the cellular function of estradiol on Aβ42-induced in vitro neurotoxicity on SH-SY5Y cells and a novel mechanism of TXNIP/TRX axis involved in estradiol function via AMPK signaling.
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Chen D, Dixon BJ, Doycheva DM, Li B, Zhang Y, Hu Q, He Y, Guo Z, Nowrangi D, Flores J, Filippov V, Zhang JH, Tang J. IRE1α inhibition decreased TXNIP/NLRP3 inflammasome activation through miR-17-5p after neonatal hypoxic-ischemic brain injury in rats. J Neuroinflammation 2018; 15:32. [PMID: 29394934 PMCID: PMC5797348 DOI: 10.1186/s12974-018-1077-9] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 01/22/2018] [Indexed: 12/18/2022] Open
Abstract
Background The endoplasmic reticulum (ER) is responsible for the control of correct protein folding and protein function which is crucial for cell survival. However, under pathological conditions, such as hypoxia–ischemia (HI), there is an accumulation of unfolded proteins thereby triggering the unfolded protein response (UPR) and causing ER stress which is associated with activation of several stress sensor signaling pathways, one of them being the inositol requiring enzyme-1 alpha (IRE1α) signaling pathway. The UPR is regarded as a potential contributor to neuronal cell death and inflammation after HI. In the present study, we sought to investigate whether microRNA-17 (miR-17), a potential IRE1α ribonuclease (RNase) substrate, arbitrates downregulation of thioredoxin-interacting protein (TXNIP) and consequent NLRP3 inflammasome activation in the immature brain after HI injury and whether inhibition of IRE1α may attenuate inflammation via miR-17/TXNIP regulation. Methods Postnatal day 10 rat pups (n = 287) were subjected to unilateral carotid artery ligation followed by 2.5 h of hypoxia (8% O2). STF-083010, an IRE1α RNase inhibitor, was intranasally delivered at 1 h post-HI or followed by an additional one administration per day for 2 days. MiR-17-5p mimic or anti-miR-17-5p inhibitor was injected intracerebroventricularly at 48 h before HI. Infarct volume and body weight were used to evaluate the short-term effects while brain weight, gross and microscopic brain tissue morphologies, and neurobehavioral tests were conducted for the long-term evaluation. Western blots, immunofluorescence staining, reverse transcription quantitative real-time polymerase chain reaction (RT-qPCR), and co-immunoprecipitation (Co-IP) were used for mechanism studies. Results Endogenous phosphorylated IRE1α expression was significantly increased after HI. Intranasal administration of STF-083010 alleviated brain injury and improved neurological behavior. MiR-17-5p expression was reduced after HI, and this decrease was attenuated by STF-083010 treatment. MiR-17-5p mimic administration ameliorated TXNIP expression, NLRP3 inflammasome activation, caspase-1 cleavage, and IL-1β production, as well as brain infarct volume. Conversely, anti-miR-17-5p inhibitor reversed IRE1α inhibition-induced decrease in TXNIP expression and inflammasome activation, as well as exacerbated brain injury after HI. Conclusions IRE1a-induced UPR pathway may contribute to inflammatory activation and brain injury following neonatal HI. IRE1a activation, through decay of miR-17-5p, elevated TXNIP expression to activate NLRP3 inflammasome and aggravated brain damage. Electronic supplementary material The online version of this article (10.1186/s12974-018-1077-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Di Chen
- Cerebrovascular Diseases Laboratory, Institute of Neuroscience, Chongqing Medical University, Chongqing, 400016, China
| | - Brandon J Dixon
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - Desislava M Doycheva
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - Bo Li
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - Yang Zhang
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - Qin Hu
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - Yue He
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - Zongduo Guo
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - Derek Nowrangi
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - Jerry Flores
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - Valery Filippov
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - John H Zhang
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA.,Department of Neurosurgery, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - Jiping Tang
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA.
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Ajaero CN, Chong CR, Procter NEK, Liu S, Chirkov YY, Heresztyn T, Chan WPA, Arstall MA, McGavigan AD, Frenneaux MP, Horowitz JD. Does cardiac resynchronization therapy restore peripheral circulatory homeostasis? ESC Heart Fail 2017; 5:129-138. [PMID: 29030923 PMCID: PMC5793973 DOI: 10.1002/ehf2.12211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 07/24/2017] [Accepted: 08/09/2017] [Indexed: 11/17/2022] Open
Abstract
Aims To evaluate whether peripheral circulatory ‘remodelling’ as measured by changes in vascular compliance and in markers of nitric oxide signalling contributes to patient response to cardiac resynchronization therapy (CRT). Methods and results Effects of CRT were evaluated in 33 patients pre‐procedure and 6 months post‐procedure. Peak oxygen consumption, 6 min walk distance, New York Heart Association class, and quality of life score were evaluated. Augmentation index and its interactions with nitric oxide (NO) were evaluated by applanation tonometry. Platelet NO responsiveness and content of thioredoxin‐interacting protein were assessed. Plasma concentrations of N‐terminal proBNP, asymmetric and symmetric dimethylarginine (SDMA), high sensitivity C‐reactive protein, catecholamines, and matrix metalloproteinases‐2 and ‐9 were assessed. Despite significant improvement in 6 min walk distance (P = 0.005), New York Heart Association class (P < 0.001), quality of life (P = 0.001), and all echocardiographic parameters post‐CRT, there were no significant changes in augmentation index measurements, thioredoxin‐interacting protein content, and platelet NO response. Significant falls in N‐terminal proBNP (P = 0.008) and SDMA (P = 0.013; independent of renal function) occurred. Falls in SDMA predicted reduction in high‐sensitivity C‐reactive protein (P = 0.04) and increases in peak oxygen consumption (P = 0.04). There were no correlations between changes in echocardiographic parameters and those in vascular function. Conclusions These data suggest that the beneficial effects of CRT over 6 months are independent of any change in peripheral NO‐related signalling. However, there is evidence that suppression of inflammation occurs, and its magnitude predicts extent of clinical improvement.
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Affiliation(s)
- Chukwudiebube N Ajaero
- The Queen Elizabeth Hospital, Adelaide, Australia.,The University of Adelaide, Adelaide, Australia.,Flinders Medical Centre, Adelaide, Australia
| | - Cher-Rin Chong
- Cardiac Metabolism Research Group, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK.,School of Medicine, The University of Adelaide, Adelaide, Australia
| | - Nathan E K Procter
- Bob Champion Research and Education Building, University of East Anglia, Norwich, UK
| | - Saifei Liu
- Basil Hetzel Institute, Adelaide, Australia
| | - Yuliy Y Chirkov
- The University of Adelaide, Adelaide, Australia.,Basil Hetzel Institute, Adelaide, Australia
| | | | - Wai Ping Alicia Chan
- The Queen Elizabeth Hospital, Adelaide, Australia.,The University of Adelaide, Adelaide, Australia.,The Lyell McEwin Hospital, Adelaide, Australia
| | - Margaret A Arstall
- The University of Adelaide, Adelaide, Australia.,Northern Adelaide Local Health Network, Adelaide, Australia
| | - Andrew D McGavigan
- Flinders Medical Centre, Adelaide, Australia.,Flinders University, Adelaide, Australia
| | - Michael P Frenneaux
- Bob Champion Research and Education Building, University of East Anglia, Norwich, UK
| | - John D Horowitz
- The Queen Elizabeth Hospital, Adelaide, Australia.,The University of Adelaide, Adelaide, Australia
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