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Choi SH, Bae HJ, Kim SY, Mony TJ, Kim HJ, Cho YE, Choi YY, An JY, Cho SY, Kim DH, Park SJ. Particulate matter (PM 10) exacerbates on MK-801-induced schizophrenia-like behaviors through the inhibition of ERK-CREB-BDNF signaling pathway. Ecotoxicol Environ Saf 2024; 276:116294. [PMID: 38574646 DOI: 10.1016/j.ecoenv.2024.116294] [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] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 03/02/2024] [Accepted: 04/01/2024] [Indexed: 04/06/2024]
Abstract
Particulate matter (PM), released into the air by a variety of natural and human activities, is a key indicator of air pollution. Although PM is known as the extensive health hazard to affect a variety of illness, few studies have specifically investigated the effects of PM10 exposure on schizophrenic development. In the present study, we aimed to investigate the impact of PM10 on MK-801, N-methyl-D-aspartate (NMDA) receptor antagonist, induced schizophrenia-like behaviors in C57BL/6 mouse. Preadolescent mice were exposed PM10 to 3.2 mg/m3 concentration for 4 h/day for 2 weeks through a compartmentalized whole-body inhalation chamber. After PM10 exposure, we conducted behavioral tests during adolescence and adulthood to investigate longitudinal development of schizophrenia. We found that PM10 exacerbated schizophrenia-like behavior, such as psychomotor agitation, social interaction deficits and cognitive deficits at adulthood in MK-801-induced schizophrenia animal model. Furthermore, the reduced expression levels of brain-derived neurotrophic factor (BDNF) and the phosphorylation of BDNF related signaling molecules, extracellular signal-regulated kinase (ERK) and cAMP response element-binding protein (CREB), were exacerbated by PM10 exposure in the adult hippocampus of MK-801-treated mice. Thus, our present study demonstrates that exposure to PM10 in preadolescence exacerbates the cognitive impairment in animal model of schizophrenia, which are considered to be facilitated by the decreased level of BDNF through reduced ERK-CREB expression.
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Affiliation(s)
- Seung-Hyuk Choi
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Ho Jung Bae
- Agriculture and Life Science Research Institute, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - So-Yeon Kim
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Tamanna Jahan Mony
- Agriculture and Life Science Research Institute, Kangwon National University, Chuncheon 24341, Republic of Korea; Department of Pathology and Anatomical Sciences, University of Missouri School of Medicine, Columbia, MO, USA
| | - Hyun-Jeong Kim
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Ye Eun Cho
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Yu-Yeong Choi
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Ju-Yeon An
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - So-Young Cho
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Dong Hyun Kim
- Department of Pharmacology and Department of Advanced Translational Medicine, School of Medicine, Konkuk University, Seoul 05029, Republic of Korea
| | - Se Jin Park
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea; School of Natural Resources and Environmental Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea; Agriculture and Life Science Research Institute, Kangwon National University, Chuncheon 24341, Republic of Korea.
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Park Y, Paing YMM, Cho N, Kim C, Yoo J, Choi JW, Lee SH. Quinic Acid Alleviates Behavior Impairment by Reducing Neuroinflammation and MAPK Activation in LPS-Treated Mice. Biomol Ther (Seoul) 2024; 32:309-318. [PMID: 38589292 PMCID: PMC11063486 DOI: 10.4062/biomolther.2023.184] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/12/2023] [Accepted: 12/27/2023] [Indexed: 04/10/2024] Open
Abstract
Compared to other organs, the brain has limited antioxidant defenses. In particular, the hippocampus is the central region for learning and memory and is highly susceptible to oxidative stress. Glial cells are the most abundant cells in the brain, and sustained glial cell activation is critical to the neuroinflammation that aggravates neuropathology and neurotoxicity. Therefore, regulating glial cell activation is a promising neurotherapeutic treatment. Quinic acid and its derivatives possess anti-oxidant and anti-inflammatory properties. Although previous studies have evidenced quinic acid's benefit on the brain, in vivo and in vitro analyses of its anti-oxidant and anti-inflammatory properties in glial cells have yet to be established. This study investigated quinic acid's rescue effect in lipopolysaccharide (LPS)-induced behavior impairment. Orally administering quinic acid restored social impairment and LPS-induced spatial and fear memory. In addition, quinic acid inhibited proinflammatory mediator, oxidative stress marker, and mitogen-activated protein kinase (MAPK) activation in the LPS-injected hippocampus. Quinic acid inhibited nitrite release and extracellular signal-regulated kinase (ERK) phosphorylation in LPS-stimulated astrocytes. Collectively, quinic acid restored impaired neuroinflammation-induced behavior by regulating proinflammatory mediator and ERK activation in astrocytes, demonstrating its potential as a therapeutic agent for neuroinflammation-induced brain disease treatments.
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Affiliation(s)
- Yongun Park
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Yunn Me Me Paing
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Namki Cho
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Changyoun Kim
- Molecular Neuropathology Section, Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jiho Yoo
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Ji Woong Choi
- College of Pharmacy and Gachon Institute of Pharmaceutical Sciences, Gachon University, Incheon 21936, Republic of Korea
| | - Sung Hoon Lee
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
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Hsu MF, LeBleu G, Flores L, Parkhurst A, Nagy LE, Haj FG. Hepatic protein tyrosine phosphatase Shp2 disruption mitigates the adverse effects of ethanol in the liver by modulating oxidative stress and ERK signaling. Life Sci 2024; 340:122451. [PMID: 38253311 DOI: 10.1016/j.lfs.2024.122451] [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] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 01/09/2024] [Accepted: 01/17/2024] [Indexed: 01/24/2024]
Abstract
AIMS Chronic excessive alcohol intake is a significant cause of alcohol-associated liver disease (ALD), a leading contributor to liver-related morbidity and mortality. The Src homology phosphatase 2 (Shp2; encoded by Ptpn11) is a widely expressed protein tyrosine phosphatase that modulates hepatic functions, but its role in ALD is mostly uncharted. MAIN METHODS Herein, we explore the effects of liver-specific Shp2 genetic disruption using the established chronic-plus-binge mouse model of ALD. KEY FINDINGS We report that the hepatic Shp2 disruption had beneficial effects and partially ameliorated ethanol-induced injury, inflammation, and steatosis in the liver. Consistently, Shp2 deficiency was associated with decreased ethanol-evoked activation of extracellular signal-regulated kinase (ERK) and oxidative stress in the liver. Moreover, primary hepatocytes with Shp2 deficiency exhibited similar outcomes to those observed upon Shp2 disruption in vivo, including diminished ethanol-induced ERK activation, inflammation, and oxidative stress. Furthermore, pharmacological inhibition of ERK in primary hepatocytes mimicked the effects of Shp2 deficiency and attenuated oxidative stress caused by ethanol. SIGNIFICANCE Collectively, these findings highlight Shp2 as a modulator of hepatic oxidative stress upon ethanol challenge and suggest the evaluation of this phosphatase as a potential therapeutic target for ALD.
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Affiliation(s)
- Ming-Fo Hsu
- Department of Nutrition, University of California Davis, Davis, CA 95616, USA.
| | - Grace LeBleu
- Department of Nutrition, University of California Davis, Davis, CA 95616, USA
| | - Lizbeth Flores
- Department of Nutrition, University of California Davis, Davis, CA 95616, USA
| | - Amy Parkhurst
- Department of Nutrition, University of California Davis, Davis, CA 95616, USA
| | - Laura E Nagy
- Department of Inflammation and Immunity, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Fawaz G Haj
- Department of Nutrition, University of California Davis, Davis, CA 95616, USA; Comprehensive Cancer Center, University of California Davis, Sacramento, CA 95817, USA; Division of Endocrinology, Diabetes, and Metabolism, Department of Internal Medicine, University of California Davis, Sacramento, CA 95817, USA.
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Yanuar R, Semba S, Nezu A, Tanimura A. Muscarinic acetylcholine receptor-mediated phosphorylation of extracellular signal-regulated kinase in HSY salivary ductal cells involves distinct signaling pathways. J Oral Biosci 2024:S1349-0079(24)00015-X. [PMID: 38336259 DOI: 10.1016/j.job.2024.02.002] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/01/2024] [Accepted: 02/02/2024] [Indexed: 02/12/2024]
Abstract
OBJECTIVES Typical agonists of G protein-coupled receptors (GPCRs), including muscarinic acetylcholine receptors (mAChRs), activate both G-protein and β-arrestin signaling systems, and are termed balanced agonists. In contrast, biased agonists selectively activate a single pathway, thereby offering therapeutic potential for the specific activation of that pathway. The mAChR agonists carbachol and pilocarpine are known to induce phosphorylation of extracellular signal-regulated kinase-1/2 (ERK1/2) via G-protein-dependent and -independent pathways, respectively. We investigated the involvement of β-arrestin and its downstream mechanisms in the ERK1/2 phosphorylation induced by carbachol and pilocarpine in the human salivary ductal cell line, HSY cells. METHODS HSY cells were stimulated with pilocarpine or carbachol, with or without various inhibitors. The cell lysates were analyzed by western blotting using the antibodies p44/p42MAPK and phosphor-p44/p42MAPK. RESULTS Western blot analysis revealed that carbachol elicited greater stimulation of ERK1/2 phosphorylation compared to pilocarpine. ERK1/2 phosphorylation was inhibited by atropine and gefitinib, suggesting that mAChR activation induces transactivation of epidermal growth factor receptors (EGFR). Moreover, inhibition of carbachol-mediated ERK1/2 phosphorylation was achieved by GF-109203X (a PKC inhibitor), a βARK1/GRK2 inhibitor, barbadin (a β-arrestin inhibitor), pitstop 2 (a clathrin inhibitor), and dynole 34-2 (a dynamin inhibitor). In contrast, pilocarpine-mediated ERK1/2 phosphorylation was only inhibited by barbadin (a β-arrestin inhibitor) and PP2 (a Src inhibitor). CONCLUSION Carbachol activates both G-protein and β-arrestin pathways, whereas pilocarpine exclusively activates the β-arrestin pathway. Additionally, downstream of β-arrestin, carbachol activates clathrin-dependent internalization, while pilocarpine activates Src.
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Affiliation(s)
- Rezon Yanuar
- Division of Pharmacology, Department of Oral Biology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Shingo Semba
- Division of Pharmacology, Department of Oral Biology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Akihiro Nezu
- Division of Pharmacology, Department of Oral Biology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Akihiko Tanimura
- Division of Pharmacology, Department of Oral Biology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan.
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Yu W, Wu Z, Li X, Ding M, Xu Y, Zhao P. Ketamine counteracts sevoflurane-induced depressive-like behavior and synaptic plasticity impairments through the adenosine A2A receptor/ERK pathway in rats. Mol Neurobiol 2023; 60:6160-6175. [PMID: 37428405 DOI: 10.1007/s12035-023-03474-w] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 07/02/2023] [Indexed: 07/11/2023]
Abstract
Ketamine is an ionic glutamic acid N-methyl-d-aspartate receptor (NMDAR) antagonist commonly used in clinical anesthesia, and its rapid and lasting antidepressant effect has stimulated great interest in psychology research. However, the molecular mechanisms underlying its antidepressant action are still undetermined. Sevoflurane exposure early in life might induce developmental neurotoxicity and mood disorders. In this study, we evaluated the effect of ketamine against sevoflurane-induced depressive-like behavior and the underlying molecular mechanisms. Here, we reported that A2AR protein expression was upregulated in rats with depression induced by sevoflurane inhalation, which was reversed by ketamine. Pharmacological experiments showed that A2AR agonists could reverse the antidepressant effect of ketamine, decrease extracellular signal-regulated kinase (ERK) phosphorylation, reduce synaptic plasticity, and induce depressive-like behavior. Our results suggest that ketamine mediates ERK1/2 phosphorylation by downregulating A2AR expression and that p-ERK1/2 increases the production of synaptic-associated proteins, enhancing synaptic plasticity in the hippocampus and thereby ameliorating the depressive-like behavior induced by sevoflurane inhalation in rats. This research provides a framework for reducing anesthesia-induced developmental neurotoxicity and developing new antidepressants.
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Affiliation(s)
- Weiwei Yu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, China
| | - Ziyi Wu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, China
| | - Xingyue Li
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, China
| | - Mengmeng Ding
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, China
| | - Ying Xu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, China
| | - Ping Zhao
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, 110004, China.
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Michinaga S, Nagata A, Ogami R, Ogawa Y, Hishinuma S. Differential regulation of histamine H 1 receptor-mediated ERK phosphorylation by G q proteins and arrestins. Biochem Pharmacol 2023; 213:115595. [PMID: 37201878 DOI: 10.1016/j.bcp.2023.115595] [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] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/03/2023] [Accepted: 05/04/2023] [Indexed: 05/20/2023]
Abstract
Gq protein-coupled histamine H1 receptors play crucial roles in allergic and inflammatory reactions, in which the phosphorylation of extracellular signal-regulated kinase (ERK) appears to mediate the production of inflammatory cytokines. ERK phosphorylation is regulated by G protein- and arrestin-mediated signal transduction pathways. Here, we aimed to explore how H1 receptor-mediated processes of ERK phosphorylation might be differentially regulated by Gq proteins and arrestins. For this purpose, we evaluated the regulatory mechanism(s) of H1 receptor-mediated ERK phosphorylation in Chinese hamster ovary cells expressing Gq protein- and arrestin-biased mutants of human H1 receptors, S487TR and S487A, in which the Ser487 residue in the C-terminal was truncated and mutated to alanine, respectively. Immunoblotting analysis indicated that histamine-induced ERK phosphorylation was prompt and transient in cells expressing Gq protein-biased S487TR, whereas it was slow and sustained in cells expressing arrestin-biased S487A. Inhibitors of Gq proteins (YM-254890) and protein kinase C (PKC) (GF109203X), and an intracellular Ca2+ chelator (BAPTA-AM) suppressed histamine-induced ERK phosphorylation in cells expressing S487TR, but not those expressing S487A. Conversely, inhibitors of G protein-coupled receptor kinases (GRK2/3) (cmpd101), β-arrestin2 (β-arrestin2 siRNA), clathrin (hypertonic sucrose), Raf (LY3009120), and MEK (U0126) suppressed histamine-induced ERK phosphorylation in cells expressing S487A, but not those expressing S487TR. These results suggest that H1 receptor-mediated ERK phosphorylation might be differentially regulated by the Gq protein/Ca2+/PKC and GRK/arrestin/clathrin/Raf/MEK pathways to potentially determine the early and late phases of histamine-induced allergic and inflammatory responses, respectively.
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Affiliation(s)
- Shotaro Michinaga
- Department of Pharmacodynamics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Ayaka Nagata
- Department of Pharmacodynamics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Ryosuke Ogami
- Department of Pharmacodynamics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Yasuhiro Ogawa
- Department of Pharmacodynamics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Shigeru Hishinuma
- Department of Pharmacodynamics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan.
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Liu F, Yu T, Liu J, Yang Q, Wu J, Ren J, Zhu N. IGFBP-7 secreted by adipose-derived stem cells inhibits keloid formation via the BRAF/MEK/ERK signaling pathway. J Dermatol Sci 2023:S0923-1811(23)00125-1. [PMID: 37316358 DOI: 10.1016/j.jdermsci.2023.05.004] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 05/09/2023] [Accepted: 05/17/2023] [Indexed: 06/16/2023]
Abstract
BACKGROUND Adipose tissue-derived stem cells (ASCs) have important clinical significance as regulators of skin scar tissue regeneration. ASCs inhibit keloid formation and increase insulin-like growth factor-binding protein-7 (IGFBP-7) expression. However, whether ASCs inhibit keloid formation through IGFBP-7 remains unclear. OBJECTIVE We aimed to assess the roles of IGFBP-7 in keloid formation. METHODS We analyzed the proliferation, migration, and apoptosis of keloid fibroblasts (KFs) treated with recombinant IGFBP-7 (rIGFBP-7) or by co-culture with ASCs using CCK8 assays, transwell assays, and flow cytometry, respectively. In addition, immunohistochemical staining, quantitative polymerase chain reaction, human umbilical vein endothelial cell tube formation, and western blotting experiments were used to assess keloid formation. RESULTS IGFBP-7 expression was significantly lower in keloid tissues than that in normal skin tissues. Stimulation of KFs with rIGFBP-7 at different concentrations or by co-culture with ASCs resulted in decreased KF proliferation. Additionally, KF stimulation with rIGFBP-7 resulted in increased apoptosis of KFs. IGFBP-7 also reduced angiogenesis in a concentration-dependent manner, and stimulation with different rIGFBP-7 concentrations or co-culture of KFs with ASCs inhibited the expression of transforming growth factor-β1, vascular endothelial growth factor, collagen I, interleukin (IL)-6, IL-8, B-raf proto-oncogene (BRAF), mitogen-activated protein kinase kinase (MEK), and extracellular signal-regulated kinase (ERK) in KFs. CONCLUSION Collectively, our findings suggested that ASC-derived IGFBP-7 prevented keloid formation by inhibiting the BRAF/MEK/ERK signaling pathway.
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Affiliation(s)
- Fang Liu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Tingting Yu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Jianlan Liu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Quyang Yang
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Jinyan Wu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Jie Ren
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China.
| | - Ningwen Zhu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China.
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Nakai C, Mimaki S, Matsushima K, Shinozaki E, Yamazaki K, Muro K, Yamaguchi K, Nishina T, Yuki S, Shitara K, Bando H, Suzuki Y, Akagi K, Nomura S, Fujii S, Sugiyama M, Nishida N, Mizokami M, Koh Y, Koshizaka T, Okada H, Abe Y, Ohtsu A, Yoshino T, Tsuchihara K. Regulation of MEK inhibitor selumetinib sensitivity by AKT phosphorylation in the novel BRAF L525R mutant. Int J Clin Oncol 2023; 28:654-663. [PMID: 36856908 PMCID: PMC10119053 DOI: 10.1007/s10147-023-02318-w] [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] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 02/17/2023] [Indexed: 03/02/2023]
Abstract
BACKGROUND Oncogenic mutations in BRAF genes are found in approximately 5-10% of colorectal cancers. The majority of BRAF mutations are located within exons 11-15 of the catalytic kinase domains, with BRAF V600E accounting for more than 80% of the observed BRAF mutations. Sensitivity to BRAF- and mitogen-activated protein kinase (MEK) inhibitors varies depending on BRAF mutations and tumor cell types. Previously, we newly identified, BRAF L525R-mutation, in the activation segment of the kinase in colorectal cancer patient. Here, we characterized the function of the BRAF L525R mutation. METHODS HEK293 cells harboring a BRAF mutation (V600E or L525R) were first characterized and then treated with cetuximab, dabrafenib, and selumetinib. Cell viability was measured using WST-1 assay and the expression of proteins involved in the extracellular signal-regulated kinase (ERK) and protein kinase B (AKT) signaling pathways was evaluated using western blot analysis. RESULTS The MEK inhibitor selumetinib effectively inhibited cell proliferation and ERK phosphorylation in BRAF L525R cells but not in BRAF V600E cells. Further studies revealed that AKT phosphorylation was reduced by selumetinib in BRAF L525R cells but not in BRAF V600E cells or selumetinib-resistant BRAF L525R cells. Moreover, the AKT inhibitor overcame the selumetinib resistance. CONCLUSIONS We established a model system harboring BRAF L525R using HEK293 cells. BRAF L525R constitutively activated ERK. AKT phosphorylation caused sensitivity and resistance to selumetinib. Our results suggest that a comprehensive network analysis may provide insights to identify effective therapies.
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Affiliation(s)
- Chikako Nakai
- Division of Translational Informatics, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
- G&G Science Co. Ltd., 4-1-1 Misato, Matsukawamachi, Fukushima, 960-1242, Japan
| | - Sachiyo Mimaki
- Division of Translational Informatics, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Koutatsu Matsushima
- G&G Science Co. Ltd., 4-1-1 Misato, Matsukawamachi, Fukushima, 960-1242, Japan
| | - Eiji Shinozaki
- Department of Gastroenterological Chemotherapy, Cancer Institute Hospital of Japanese Foundation for Cancer Research, 3-8-31 Ariake, Koto-ku, Tokyo, 135-0063, Japan
| | - Kentaro Yamazaki
- Division of Gastrointestinal Oncology, Shizuoka Cancer Center, 1007 Shimo-Nagakubo, Nagaizumi-Cho, Sunto, Shizuoka, 411-8777, Japan
| | - Kei Muro
- Department of Clinical Oncology, Aichi Cancer Center Hospital, 1-1 Kanokoden, Chikusa-ku, Nagoya, 464-8681, Japan
| | - Kensei Yamaguchi
- Department of Gastroenterological Chemotherapy, Cancer Institute Hospital of Japanese Foundation for Cancer Research, 3-8-31 Ariake, Koto-ku, Tokyo, 135-0063, Japan
| | - Tomohiro Nishina
- Department of Gastrointestinal Medical Oncology, National Hospital Organization Shikoku Cancer Center, 160 Minamiumemotomachi, Matsuyama, Ehime, 791-0245, Japan
| | - Satoshi Yuki
- Department of Gastroenterology and Hepatology, Hokkaido University Hospital, Sapporo, Japan
| | - Kohei Shitara
- Department of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Hideaki Bando
- Department of Clinical Oncology, Aichi Cancer Center Hospital, 1-1 Kanokoden, Chikusa-ku, Nagoya, 464-8681, Japan
| | - Yutaka Suzuki
- Department of Computational Biology, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan
| | - Kiwamu Akagi
- Division of Molecular Diagnosis and Cancer Prevention, Saitama Cancer Center, 818 Komuro, Inami-machi, Kitaadachi, Saitama, 362-0806, Japan
| | - Shogo Nomura
- Biostatistics Division, Center for Research and Administration and Support, National Cancer Center, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Satoshi Fujii
- Department of Molecular Pathology, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Masaya Sugiyama
- Genome Medical Sciences Project, National Center for Global Health and Medicine, 1-7-1 Kohnodai, Ichikawa, Chiba, 272-8516, Japan
| | - Nao Nishida
- Genome Medical Sciences Project, National Center for Global Health and Medicine, 1-7-1 Kohnodai, Ichikawa, Chiba, 272-8516, Japan
| | - Masashi Mizokami
- Genome Medical Sciences Project, National Center for Global Health and Medicine, 1-7-1 Kohnodai, Ichikawa, Chiba, 272-8516, Japan
| | - Yasuhiro Koh
- Third Department of Internal Medicine, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8509, Japan
| | - Takuya Koshizaka
- G&G Science Co. Ltd., 4-1-1 Misato, Matsukawamachi, Fukushima, 960-1242, Japan
| | - Hideki Okada
- G&G Science Co. Ltd., 4-1-1 Misato, Matsukawamachi, Fukushima, 960-1242, Japan
| | - Yukiko Abe
- G&G Science Co. Ltd., 4-1-1 Misato, Matsukawamachi, Fukushima, 960-1242, Japan
| | - Atsushi Ohtsu
- National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Takayuki Yoshino
- Department of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Katsuya Tsuchihara
- Division of Translational Informatics, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.
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Zhou W, Hou Y, Yu T, Wang T, Ding Y, Nie H. Submersion and hypoxia inhibit alveolar epithelial Na + transport through ERK/NF-κB signaling pathway. Respir Res 2023; 24:117. [PMID: 37095538 PMCID: PMC10127099 DOI: 10.1186/s12931-023-02428-z] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 04/19/2023] [Indexed: 04/26/2023] Open
Abstract
BACKGROUND Hypoxia is associated with many respiratory diseases, partly due to the accumulation of edema fluid and mucus on the surface of alveolar epithelial cell (AEC), which forms oxygen delivery barriers and is responsible for the disruption of ion transport. Epithelial sodium channel (ENaC) on the apical side of AEC plays a crucial role to maintain the electrochemical gradient of Na+ and water reabsorption, thus becomes the key point for edema fluid removal under hypoxia. Here we sought to explore the effects of hypoxia on ENaC expression and the further mechanism related, which may provide a possible treatment strategy in edema related pulmonary diseases. METHODS Excess volume of culture medium was added on the surface of AEC to simulate the hypoxic environment of alveoli in the state of pulmonary edema, supported by the evidence of increased hypoxia-inducible factor-1 expression. The protein/mRNA expressions of ENaC were detected, and extracellular signal-regulated kinase (ERK)/nuclear factor κB (NF-κB) inhibitor was applied to explore the detailed mechanism about the effects of hypoxia on epithelial ion transport in AEC. Meanwhile, mice were placed in chambers with normoxic or hypoxic (8%) condition for 24 h, respectively. The effects of hypoxia and NF-κB were assessed through alveolar fluid clearance and ENaC function by Ussing chamber assay. RESULTS Hypoxia (submersion culture mode) induced the reduction of protein/mRNA expression of ENaC, whereas increased the activation of ERK/NF-κB signaling pathway in parallel experiments using human A549 and mouse alveolar type 2 cells, respectively. Moreover, the inhibition of ERK (PD98059, 10 µM) alleviated the phosphorylation of IκB and p65, implying NF-κB as a downstream pathway involved with ERK regulation. Intriguingly, the expression of α-ENaC could be reversed by either ERK or NF-κB inhibitor (QNZ, 100 nM) under hypoxia. The alleviation of pulmonary edema was evidenced by the administration of NF-κB inhibitor, and enhancement of ENaC function was supported by recording amiloride-sensitive short-circuit currents. CONCLUSIONS The expression of ENaC was downregulated under hypoxia induced by submersion culture, which may be mediated by ERK/NF-κB signaling pathway.
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Affiliation(s)
- Wei Zhou
- Department of Stem Cells and Regenerative Medicine, College of Basic Medical Science, China Medical University, Shenyang, China
| | - Yapeng Hou
- Department of Stem Cells and Regenerative Medicine, College of Basic Medical Science, China Medical University, Shenyang, China
| | - Tong Yu
- Department of Stem Cells and Regenerative Medicine, College of Basic Medical Science, China Medical University, Shenyang, China
| | - Tingyu Wang
- Department of Stem Cells and Regenerative Medicine, College of Basic Medical Science, China Medical University, Shenyang, China
| | - Yan Ding
- Department of Stem Cells and Regenerative Medicine, College of Basic Medical Science, China Medical University, Shenyang, China
| | - Hongguang Nie
- Department of Stem Cells and Regenerative Medicine, College of Basic Medical Science, China Medical University, Shenyang, China.
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Hu L, Bai G, Xu Q, Zhao G, Jiang N, Yao H, Liu X, Du Z. Candidalysin amplifies the immune inflammatory response in Candida albicans keratitis through the TREM-1/DAP12 pathway. Int Immunopharmacol 2023; 119:110195. [PMID: 37087869 DOI: 10.1016/j.intimp.2023.110195] [Citation(s) in RCA: 1] [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: 12/14/2022] [Revised: 04/10/2023] [Accepted: 04/11/2023] [Indexed: 04/25/2023]
Abstract
Candidalysin is a fungal peptide toxin secreted by Candida albicans hyphae during invasion into epithelial cells. In Candida albicans-infected mucosa, candidalysin causes epithelial cell damage and activates downstream inflammatory responses, especially the release of inflammatory cytokines. However, the role of candidalysin in Candida albicans corneal keratitis remains unexplored. Moreover, it remains unclear whether candidalysin regulates the inflammatory response through the TREM-1/DAP12 pathway in Candida albicans corneal keratitis. In this study, we determined the expression pattern of TREM-1 in a mouse model of Candida albicans corneal keratitis and investigated the molecular mechanism underlying the inflammatory response regulation by candidalysin. The corneal keratitis model was established in C57BL/6 mice. In the GF9 group, mice were pretreated and then treated with the TREM-1 inhibitor GF9; in the candidalysin group, mice were treated with peptide candidalysin; and in the PD98059 group, mice were pretreated with the ERK inhibitor PD98059. Slit-lamp photography, clinical scoring, PCR, western blotting and immunofluorescence assay were performed to observe disease response and GF9 therapeutic efficacy. Pretreatment with candidalysin or PD98059 was performed before Candida albicans infection. GF9 treatment reduced the expression of TREM-1 and cytokines in the infected mouse cornea, whereas candidalysin treatment increased the expression of TREM-1, p-ERK, and cytokines, and this increase was inhibited by GF9. The candidalysin-induced increment of TREM-1, p-ERK, and cytokines was inhibited by PD98059 pretreatment. These data suggest that candidalysin can initiate inflammatory response in Candida albicans corneal keratitis through the TREM-1/DAP12 pathway and can regulate cytokine expression by enhancing ERK phosphorylation.
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Affiliation(s)
- Liting Hu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
| | - Guitao Bai
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China; Department of Ophthalmology, Zigong First People's Hospital, 42 Shang Yihao Branch Road, ZiGong 643000, China
| | - Qiang Xu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
| | - Guiqiu Zhao
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
| | - Nan Jiang
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
| | - Hua Yao
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
| | - Xueqing Liu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China
| | - Zhaodong Du
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China.
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Wang H, Ma G, Min J, Li J, Shan W, Zuo Z. Inhibition of ERK/CREB signaling contributes to postoperative learning and memory dysfunction in neonatal rats. J Mol Med (Berl) 2023; 101:265-278. [PMID: 36688960 PMCID: PMC10676212 DOI: 10.1007/s00109-023-02285-9] [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] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 12/11/2022] [Accepted: 01/12/2023] [Indexed: 01/24/2023]
Abstract
Exposure to surgery with anesthesia early in life may lead to abnormal behavior, learning, and memory in humans. Pre-clinical studies have suggested a critical role of glial cell-derived neurotrophic factor (GDNF) in these effects. We hypothesize that the inhibition of extracellular signal-regulated kinase (ERK)-cAMP response element-binding protein (CREB) pathway contributes to GDNF decrease and the dysfunction of learning and memory. To address this hypothesis, 7-day-old Sprague-Dawley male and female rats were subjected to right carotid artery exposure (surgery) under sevoflurane anesthesia. Their learning and memory were tested by the Barnes maze, and novel object recognition tests started 23 days after the surgery. Blood and brain were harvested at various times after surgery for biochemical analyses. Rats with surgery and anesthesia performed poorly in the Barnes maze and novel object recognition tests compared with control rats. Rats with surgery had a decreased GDNF concentration in the brain and urine. The concentrations of urine GDNF were negatively correlated with the performance of rats in a delayed memory phase of the Barnes maze test. Surgery increased proinflammatory cytokines in the blood and brain. Intracerebroventricular injection of GDNF attenuated the increased inflammatory response in surgery rats. Surgery inhibited ERK and CREB. Inhibiting ERK reduced GDNF and induced poor performance in the Barnes maze and novel object recognition tests of rats without surgery. Surgery also increased brain-derived natriuretic peptide (BNP) in the brain. Intracerebroventricular injection of BNP inhibited ERK and CREB, reduced GDNF, and impaired learning and memory. Surgery, ERK inhibition, and BNP reduced the expression of synaptic proteins. Our results suggest that surgery increases BNP that inhibits ERK-CREB signaling to reduce GDNF, which leads to an unbalanced inflammatory response and a reduced synaptic protein expression for the development of postoperative cognitive dysfunction. KEY MESSAGES: Surgery increases BNP and decreases ERK/CREB signaling to reduce GDNF. The increase in BNP and decrease in ERK/CREB signaling contribute to postoperative cognitive dysfunction. GDNF reduction contributes to neuroinflammatory response after surgery. Urine GDNF concentrations are negatively corrected with poor spatial memory performance.
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Affiliation(s)
- Hui Wang
- Department of Anesthesiology, University of Virginia, Charlottesville, VA, 22901, USA
- Department of Anesthesiology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia, China
| | - Gang Ma
- Department of Anesthesiology, University of Virginia, Charlottesville, VA, 22901, USA
- Department of Anesthesiology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia, China
| | - Jia Min
- Department of Anesthesiology, University of Virginia, Charlottesville, VA, 22901, USA
- Department of Anesthesiology, the First Affiliated Hospital, Nanchang University, Nanchang, Jiangxi, China
| | - Jun Li
- Department of Anesthesiology, University of Virginia, Charlottesville, VA, 22901, USA
| | - Weiran Shan
- Department of Anesthesiology, University of Virginia, Charlottesville, VA, 22901, USA
| | - Zhiyi Zuo
- Department of Anesthesiology, University of Virginia, Charlottesville, VA, 22901, USA.
- Department of Anesthesiology, University of Virginia Health, 1 Hospital Drive, PO Box 800710, Charlottesville, VA, 22908-0710, USA.
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Yokota S, Chosa N, Matsumoto S, Satoh K, Ishisaki A. Extracellular adenosine 5'-diphosphate promotes MCP-1/CCL2 expression via the P2Y 13 purinergic receptor/ERK signaling axis in temporomandibular joint-derived mouse fibroblast-like synoviocytes. Mol Biol Rep 2023; 50:1595-1602. [PMID: 36526849 PMCID: PMC9889505 DOI: 10.1007/s11033-022-08125-2] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 11/15/2022] [Indexed: 12/23/2022]
Abstract
BACKGROUND Temporomandibular joint osteoarthritis (TMJ-OA) causes cartilage degeneration, bone cavitation, and fibrosis of the TMJ. However, the mechanisms underlying the fibroblast-like synoviocyte (FLS)-mediated inflammatory activity in TMJ-OA remain unclear. METHODS AND RESULTS Reverse transcription-quantitative polymerase chain reaction analysis revealed that the P2Y1, P2Y12, and P2Y13 purinergic receptor agonist adenosine 5'-diphosphate (ADP) significantly induces monocyte chemotactic protein 1 (MCP-1)/ C-C motif chemokine ligand 2 (CCL2) expression in the FLS1 synovial cell line. In contrast, the uracil nucleotide UTP, which is a P2Y2 and P2Y4 agonist, has no significant effect on MCP-1/CCL2 production in FLS1 cells. In addition, the P2Y13 antagonist MRS 2211 considerably decreases the expression of ADP-induced MCP-1/CCL2, whereas ADP stimulation enhances extracellular signal-regulated kinase (ERK) phosphorylation. Moreover, it was found that the mitogen-activated protein kinase/ERK kinase (MEK) inhibitor U0126 reduces ADP-induced MCP-1/CCL2 expression. CONCLUSION ADP enhances MCP-1/CCL2 expression in TMJ FLSs via P2Y13 receptors in an MEK/ERK-dependent manner, thus resulting in inflammatory cell infiltration in the TMJ. Collectively, the findings of this study contribute to a partial clarification of the signaling pathway underlying the development of inflammation in TMJ-OA and can help identify potential therapeutic targets for suppressing ADP-mediated purinergic signaling in this disease.
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Affiliation(s)
- Seiji Yokota
- Division of Cellular Biosignal Sciences, Department of Biochemistry, Iwate Medical University, 1-1-1 Idai-dori, Yahaba-cho, Shiwa-gun, 028-3694, Iwate, Japan.
| | - Naoyuki Chosa
- Division of Cellular Biosignal Sciences, Department of Biochemistry, Iwate Medical University, 1-1-1 Idai-dori, Yahaba-cho, Shiwa-gun, 028-3694, Iwate, Japan
| | - Shikino Matsumoto
- Division of Orthodontics, Department of Developmental Oral Health Science, Iwate Medical University, 19-1 Uchimal, 020-8505, Morioka-shi, Iwate, Japan
| | - Kazuro Satoh
- Division of Orthodontics, Department of Developmental Oral Health Science, Iwate Medical University, 19-1 Uchimal, 020-8505, Morioka-shi, Iwate, Japan
| | - Akira Ishisaki
- Division of Cellular Biosignal Sciences, Department of Biochemistry, Iwate Medical University, 1-1-1 Idai-dori, Yahaba-cho, Shiwa-gun, 028-3694, Iwate, Japan.
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Yoshida M, Yamamoto K, Kuwaki T. Positive memory increases cataplexy-like behaviors in narcolepsy mice as revealed using conditioned place preference test. BMC Neurosci 2022; 23:82. [PMID: 36577939 PMCID: PMC9798626 DOI: 10.1186/s12868-022-00772-2] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 12/20/2022] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Cataplexy is a loss of muscle tone that can lead to postural collapse, disturbing the daily life of narcolepsy patients; it is often triggered by positive emotions such as laughter in human patients. Narcolepsy model mice also show cataplexy, and its incidence increases in response to positive emotion-inducing stimuli such as chocolate and female courtship. Although such observation indicates a positive emotion-related nature of cataplexy in narcolepsy mice, they also show cataplexy without any apparent triggering stimulus ~ (spontaneous cataplexy). Therefore, we hypothesized that some spontaneous cataplexy in narcoleptic mice might indicate the remembering of happy moments. RESULTS To test our hypothesis, we did a conditioned place preference test on orexin/hypocretin neuron-ablated (ORX-AB) mice, one of the animal models of human narcolepsy, and counted the number of cataplexy-like behaviors. ORX-AB mice successfully remembered the chocolate-associated chamber, and the number of cataplexy-like behaviors significantly increased in the chocolate-associated chamber but not in the control chamber. In addition, ORX-AB mice remembered the aversive odor-associated chamber and avoided entering without affecting the number of cataplexy-like behaviors. Finally, similar activation of the nucleus accumbens, a positive emotion-related nucleus, was observed during both spontaneous and chocolate-induced cataplexy behaviors. CONCLUSIONS These results support our hypothesis and will promote the usefulness of a narcolepsy mice model in emotion research and serve as a basis for a better understanding of cataplexy in narcolepsy patients.
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Affiliation(s)
- Mayuko Yoshida
- grid.258333.c0000 0001 1167 1801Department of Physiology, Graduate School of Medical and Dental Sciences, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8544 Japan
| | - Koki Yamamoto
- grid.258333.c0000 0001 1167 1801Department of Physiology, Graduate School of Medical and Dental Sciences, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8544 Japan
| | - Tomoyuki Kuwaki
- grid.258333.c0000 0001 1167 1801Department of Physiology, Graduate School of Medical and Dental Sciences, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8544 Japan
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Baek S, Kwon SH, Jeon JY, Lee GY, Ju HS, Yun HJ, Cho DJ, Lee KP, Nam MH. Radotinib attenuates TGFβ -mediated pulmonary fibrosis in vitro and in vivo: exploring the potential of drug repurposing. BMC Pharmacol Toxicol 2022; 23:93. [PMID: 36522756 PMCID: PMC9753032 DOI: 10.1186/s40360-022-00634-x] [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] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 11/29/2022] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Tyrosine kinase (TK) plays a crucial role in the pathogenesis of idiopathic pulmonary fibrosis. Here, we aimed to investigate whether radotinib (Rb) could inhibit pulmonary fibrosis by inhibiting TK in vitro and in vivo. METHODS The antifibrotic effects of Rb in transforming growth factor-β (TGF-β)1-stimulated A549 cells were determined using real-time polymerase chain reaction, western blotting, and immunocytochemistry assays. Rb inhibition of bleomycin-induced lung fibrosis in Sprague Dawley (SD) rats was determined by histopathological and immunohistochemical analyses. Rb-interfering metabolites were analyzed using LC-MS/MS. RESULTS Rb concentrations of up to 1000 nM did not affect the viability of A549 cells, but Rb (30 nM) significantly reduced expression of TGF-β1 (10 ng/mL)-induced ECM factors, such as Snail, Twist, and F-actin. Rb also regulated TGF-β1-overexpressed signal cascades, such as fibronectin and α-smooth muscle actin. Furthermore, Rb attenuated the phosphorylation of Smad2 and phosphorylation of kinases, such as, extracellular signal-regulated kinase, and protein kinase B. In the inhibitory test against bleomycin (5 mg/kg)-induced lung fibrosis, the Rb (30 mg/kg/daily)-treated group showed a half-pulmonary fibrosis region compared to the positive control group. In addition, Rb significantly reduced collagen type I and fibronectin expression in the bleomycin-induced fibrotic region of SD rats. Further, the identified metabolite pantothenic acid was not altered by Rb. CONCLUSION Taken together, these results indicate that Rb inhibits TGF-β1-induced pulmonary fibrosis both in vitro and in vivo. These findings suggest that Rb may be an effective treatment for pulmonary fibrosis-related disorders and idiopathic pulmonary fibrosis.
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Affiliation(s)
- Suji Baek
- Research and Development Center, UMUST R&D Corporation, 84, Madeul-ro 13-gil, Dobong-gu, 01411, Seoul, Republic of Korea
| | - Seung Hae Kwon
- Seoul Center, Korean Basic Science Institute, 02841, Seoul, Republic of Korea
| | - Joo Yeong Jeon
- Seoul Center, Korean Basic Science Institute, 02841, Seoul, Republic of Korea
| | - Gong Yeal Lee
- Il Yang Pharm Co.,Ltd, 37, Hagal-ro 136 Beon-gil, Giheung-gu, 17096, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Hyun Soo Ju
- Il Yang Pharm Co.,Ltd, 37, Hagal-ro 136 Beon-gil, Giheung-gu, 17096, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Hyo Jung Yun
- Il Yang Pharm Co.,Ltd, 37, Hagal-ro 136 Beon-gil, Giheung-gu, 17096, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Dae Jin Cho
- Il Yang Pharm Co.,Ltd, 37, Hagal-ro 136 Beon-gil, Giheung-gu, 17096, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Kang Pa Lee
- Research and Development Center, UMUST R&D Corporation, 84, Madeul-ro 13-gil, Dobong-gu, 01411, Seoul, Republic of Korea.
| | - Myung Hee Nam
- Seoul Center, Korean Basic Science Institute, 02841, Seoul, Republic of Korea.
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Huang S, Ma Y, Wang F, Li J, Yang Z, Jiang Y, Chen X, Hu S, Yi Q. ERK is involved in the regulation of CpG ODN 2395 on the expression levels of anti-lipopolysaccharide factors in Chinese mitten crab, Eriocheir sinensis. Fish Shellfish Immunol 2022; 131:1206-1213. [PMID: 36403703 DOI: 10.1016/j.fsi.2022.11.023] [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] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 11/10/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
CpG oligodeoxynucleotides (ODN), as an effective adjuvant or immunopotentiator, activate the immune system and induce various immune responses. Recently, it has also been reported that high dose of CpG ODN can lead to immunosuppression. However, the underlying mechanism of CpG ODN-mediated immune response remains largely unknown in invertebrates. In the present study, the role of ERK in regulating expression levels of anti-lipopolysaccharide factors (ALFs) induced by different doses of CpG ODN 2395 was analyzed in Chinese mitten crab, Eriocheir sinensis. The mRNA expression levels of EsALFs (EsALF1, EsALF2 and EsALF3) and EsERK in haemocytes were observed to increase from 6 h to 48 h post low doses of CpG ODN 2395 (0.5 μg and 2.5 μg) stimulation, while they were suppressed after high dose of CpG ODN 2395 (12.5 μg) injection. Meanwhile, the phosphorylation levels of ERK in haemocytes were significantly promoted after low doses of CpG ODN 2395 injection, and a reduce level of ERK phosphorylation was observed after high dose of CpG ODN 2395 injection. Further investigation showed that the expression levels of EsALFs induced by CpG ODN 2395 were markedly down-regulated after knocking down the expression of EsERK. Similarly, the EsALFs mRNA expression were also inhibited post different doses of CpG ODN 2395 stimulation in PD98059 (ERK inhibitor) injection crabs. These results collectively suggest that ERK is involved in regulating the expression level of EsALFs induced by different dose of CpG ODN 2395 in Chinese mitten crab, which contribute to the understanding of the regulation of CpG ODN involving in immune response in crustaceans.
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Affiliation(s)
- Shu Huang
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 11026, China
| | - Yuhan Ma
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 11026, China
| | - Fengchi Wang
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 11026, China
| | - Jiaming Li
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 11026, China
| | - Zhichao Yang
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 11026, China
| | - Yusheng Jiang
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 11026, China
| | - Xi Chen
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 11026, China
| | - Shengyang Hu
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 11026, China
| | - Qilin Yi
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 11026, China.
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Zhang Q, Liu L, Hu Y, Shen L, Li L, Wang Y. Kv1.3 Channel Is Involved In Ox-LDL-induced Macrophage Inflammation Via ERK/NF-κB signaling pathway. Arch Biochem Biophys 2022; 730:109394. [PMID: 36100082 DOI: 10.1016/j.abb.2022.109394] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 07/23/2022] [Revised: 08/30/2022] [Accepted: 09/06/2022] [Indexed: 11/29/2022]
Abstract
Macrophage inflammatory response is crucial for the initiation and progression of atherosclerosis. The voltage-gated potassium channel Kv1.3 plays an important role in the modulation of macrophage function. The aim of this study was to investigate the effect and possible mechanism of Kv1.3 on inflammation in oxidized low-density lipoprotein (ox-LDL)-induced RAW264.7 macrophages. Treatment with Kv1.3-siRNA attenuated the expression of IL-6 and TNF-α and reduced the phosphorylation of ERK1/2 and NF-κB in ox-LDL-induced macrophages. In contrast, overexpression of Kv1.3 with Lv-Kv1.3 promoted the expression of IL-6 and TNF-α, and increased ERK1/2 and NF-κB phosphorylation in macrophages. PD-98059, a specific inhibitor of ERK, reversed the expression of IL-6 and TNF-α in ox-LDL-treated macrophages. Kv1.3-siRNA did not inhibit inflammation any further when cells were treated with PD-98059. This suggests that ERK acts as a downstream regulator of the Kv1.3 channel. In conclusion, Kv1.3 may be an indispensable membrane protein in ox-LDL-induced RAW264.7 macrophage inflammation in atherosclerosis through the ERK/NF-κB pathway.
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Affiliation(s)
- Qiujie Zhang
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, China; Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital of Shandong University, China
| | - Lin Liu
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, China; Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital of Shandong University, China
| | - Yanyan Hu
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, China; Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital of Shandong University, China
| | - Lin Shen
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, China; Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital of Shandong University, China
| | - Li Li
- Key Laboratory of Cardiovascular Remodeling and Function Research, Department of Cardiology, Qilu Hospital of Shandong University, China
| | - Yuanyuan Wang
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, China; Key Laboratory of Cardiovascular Proteomics of Shandong Province, Qilu Hospital of Shandong University, China.
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Murase R, Shingu Y, Wakasa S. Cardioprotective effects of chloroquine pretreatment on ischemic and reperfusion injury via activation of ERK1/2 in isolated rat hearts. Mol Biol Rep 2022; 49:9429-9436. [PMID: 35896843 DOI: 10.1007/s11033-022-07801-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 03/14/2022] [Accepted: 07/15/2022] [Indexed: 01/18/2023]
Abstract
PURPOSE Several therapeutic agents have been found to prevent myocardial ischemic and reperfusion (I/R) injury after cardiac surgery; however, no drug is routinely used to afford cardioprotective benefits in clinical settings. Herein, we aimed to determine whether chloroquine (CQ) pretreatment attenuates I/R injury after global ischemia in isolated rat hearts and elucidate mechanisms underlying the effects of CQ. METHODS Isolated rat hearts were subjected to 30-min global ischemia, followed by 60-min reperfusion with Krebs-Henseleit buffer (KHB). Immediately before ischemia, 10 mL of pretreatment solutions (KHB, n = 4 or KHB + CQ [100 μM], n = 4) were injected through the aortic root. Cardiac function was examined based on the rate pressure product (RPP). Myocardial apoptosis was evaluated using TUNEL staining. To assess the reperfusion ischemia salvage kinase pathway, protein expression levels of AKT and extracellular signal-regulated kinase (ERK1/2) were determined using western blotting. To investigate the role of ERK1/2, an ERK1/2 selective inhibitor was used in eight additional rats. RESULTS The recovery rate of the RPP was higher in the KHB + CQ group than in the KHB group 60 min after I/R (KHB, 44 ± 3% vs. KHB + CQ, 69 ± 7%; P = 0.019, d = 2.2). CQ pretreatment reduced apoptosis and enhanced the phosphorylation of ERK1/2; however, AKT phosphorylation was unaltered. In addition, the ERK1/2 inhibitor abolished CQ-mediated cardioprotective effects. CONCLUSIONS CQ pretreatment showed protective effects on cardiac function after I/R by activating ERK1/2.
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Affiliation(s)
- Ryota Murase
- Department of Cardiovascular and Thoracic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kitaku, Sapporo, 060-8638, Japan
| | - Yasushige Shingu
- Department of Cardiovascular and Thoracic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kitaku, Sapporo, 060-8638, Japan.
| | - Satoru Wakasa
- Department of Cardiovascular and Thoracic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kitaku, Sapporo, 060-8638, Japan
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Zhou J, Yang J, Dong Y, Shi Y, Zhu E, Yuan H, Li X, Wang B. Oncostatin M receptor regulates osteoblast differentiation via extracellular signal-regulated kinase/autophagy signaling. Stem Cell Res Ther 2022; 13:278. [PMID: 35765036 PMCID: PMC9241272 DOI: 10.1186/s13287-022-02958-1] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 06/12/2022] [Indexed: 11/10/2022] Open
Abstract
Background Oncostatin M receptor (OSMR), as one of the receptors for oncostatin M (OSM), has previously been shown to mediate the stimulatory role of OSM in osteoclastogenesis and bone resorption. However, it remains to be clarified whether and how OSMR affects the differentiation of osteoblasts. Methods The expression level of OSMR during osteoblast and adipocyte differentiation was examined. The role of OSMR in the differentiation was investigated using in vitro gain-of-function and loss-of-function experiments. The mechanisms by which OSMR regulates bone cell differentiation were explored. Finally, in vivo function of OSMR in cell fate determination and bone homeostasis was studied after transplantation of OSMR-silenced bone marrow stromal cells (BMSCs) to the marrow of ovariectomized mice. Results OSMR was regulated during osteogenic and adipogenic differentiation of marrow stromal progenitor cells and increased in the metaphysis of ovariectomized mice. OSMR suppressed osteogenic differentiation and stimulated adipogenic differentiation of progenitor cells. Mechanistic investigations showed that OSMR inhibited extracellular signal-regulated kinase (ERK) and autophagy signaling. The downregulation of autophagy, which was mediated by ERK inhibition, suppressed osteogenic differentiation of progenitor cells. Additionally, inactivation of ERK/autophagy signaling attenuated the stimulation of osteogenic differentiation induced by Osmr siRNA. Furthermore, transplantation of BMSCs in which OSMR was silenced to the marrow of mice promoted osteoblast differentiation, attenuated fat accumulation and osteoclast differentiation, and thereby relieved the osteopenic phenotype in the ovariectomized mice. Conclusions Our study has for the first time established the direct role of OSMR in regulating osteogenic differentiation of marrow stromal progenitor cells through ERK-mediated autophagy signaling. OSMR thus contributes to bone homeostasis through dual regulation of osteoblasts and osteoclasts. It also suggests that OSMR may be a potential target for the treatment of metabolic disorders such as osteoporosis. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-02958-1.
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Affiliation(s)
- Jie Zhou
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital and Institute of Endocrinology, Tianjin Medical University, 6 Huan-Rui-Bei Road, Tianjin, 300134, China
| | - Junying Yang
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital and Institute of Endocrinology, Tianjin Medical University, 6 Huan-Rui-Bei Road, Tianjin, 300134, China.,College of Basic Medical Sciences, Tianjin Medical University, 22 Qi-Xiang-Tai Road, Tianjin, 300070, China
| | - Yuan Dong
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital and Institute of Endocrinology, Tianjin Medical University, 6 Huan-Rui-Bei Road, Tianjin, 300134, China.,College of Basic Medical Sciences, Tianjin Medical University, 22 Qi-Xiang-Tai Road, Tianjin, 300070, China
| | - Yaru Shi
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital and Institute of Endocrinology, Tianjin Medical University, 6 Huan-Rui-Bei Road, Tianjin, 300134, China
| | - Endong Zhu
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital and Institute of Endocrinology, Tianjin Medical University, 6 Huan-Rui-Bei Road, Tianjin, 300134, China
| | - Hairui Yuan
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital and Institute of Endocrinology, Tianjin Medical University, 6 Huan-Rui-Bei Road, Tianjin, 300134, China
| | - Xiaoxia Li
- College of Basic Medical Sciences, Tianjin Medical University, 22 Qi-Xiang-Tai Road, Tianjin, 300070, China
| | - Baoli Wang
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital and Institute of Endocrinology, Tianjin Medical University, 6 Huan-Rui-Bei Road, Tianjin, 300134, China.
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Guler S, Altunok TH, Sarioglu A, Zik B, Asmaz D, Kayapunar N, Sonmez O, Tepedelen BE, Yalcin A. Overexpression of dual-specificity phosphatases 4 and 13 attenuates transforming growth factor β1-induced migration and drug resistance in A549 cells in vitro. Biochem Biophys Res Commun 2022; 606:35-41. [PMID: 35338857 DOI: 10.1016/j.bbrc.2022.03.090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 03/07/2022] [Accepted: 03/16/2022] [Indexed: 11/25/2022]
Abstract
Transforming growth factor-beta (TGFβ) proteins induce an epithelial-mesenchymal transition (EMT) programme that is associated with increased invasive and drug-resistant phenotype of carcinoma cells. In addition to the canonical pathway involving SMAD proteins, the mitogen-activated kinase (MAPK) pathway via extracellular signal-regulated kinases ½ (ERK1/2) is also involved in promoting and maintaining a mesenchymal phenotype by tumor cells following TGFβ signal activation. As dual-specificity phosphatases (DUSPs) regulate ERK1/2 activity by dephosphorylation, we aimed to examine DUSPs' expression upon TGFβ stimulation and whether DUSPs play a role in the EMT and related phenotypes promoted by TGFβ1 in A549 cells. We found that TGFβ1 stimulation led to marked changes in several DUSP proteins, including significant decreases in DUSP4 and DUSP13 expressions. We then showed that the ectopic co-expression of DUSP4/13 suppresses TGFβ1-induced ERK1/2 phosphorylation and protein levels of the EMT transcription factors Snail and Slug proteins. We then demonstrated that DUSP4/13 co-expression partially inhibited TGFβ1-promoted migration, invasion, and chemoresistance in A549 cells. Collectively, this report provides data for the involvement of DUSP4/13 in malignant phenotypes regulated by TGFβ1 in A549 cells.
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Affiliation(s)
- Sabire Guler
- Department of Histology & Embryology, School of Veterinary Medicine, Bursa Uludag University, Bursa, 16059, Turkey
| | - Tugba H Altunok
- Department of Biochemistry, School of Veterinary Medicine, Bursa Uludag University, Bursa, 16059, Turkey
| | - Aybike Sarioglu
- Department of Biochemistry, School of Veterinary Medicine, Bursa Uludag University, Bursa, 16059, Turkey
| | - Berrin Zik
- Department of Histology & Embryology, School of Veterinary Medicine, Bursa Uludag University, Bursa, 16059, Turkey
| | - Deniz Asmaz
- Department of Histology & Embryology, School of Veterinary Medicine, Bursa Uludag University, Bursa, 16059, Turkey
| | - Nuray Kayapunar
- Department of Histology & Embryology, School of Veterinary Medicine, Bursa Uludag University, Bursa, 16059, Turkey
| | - Oner Sonmez
- Department of Biochemistry, School of Veterinary Medicine, Bursa Uludag University, Bursa, 16059, Turkey
| | - Burcu Erbaykent Tepedelen
- Division of Molecular Biology & Genetics, School of Arts & Sciences, Bursa Uludag University, Bursa, 16059, Turkey
| | - Abdullah Yalcin
- Department of Biochemistry, School of Veterinary Medicine, Bursa Uludag University, Bursa, 16059, Turkey.
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20
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Ren H, Chen Y, Ao Z, Cheng Q, Yang X, Tao H, Zhao L, Shen A, Li P, Fu Q. PDE4D binds and interacts with YAP to cooperatively promote HCC progression. Cancer Lett 2022; 541:215749. [PMID: 35597479 DOI: 10.1016/j.canlet.2022.215749] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 04/27/2022] [Accepted: 05/16/2022] [Indexed: 11/02/2022]
Abstract
The role of cAMP in the development of hepatocellular carcinoma (HCC) is controversial and the biological function of cAMP-hydrolysing enzyme phosphodiesterase 4D (PDE4D) in HCC remains unclear. In this study, we observed markedly higher PDE4D expression in HCC patients with poor survival. PDE4D bound to yes-associated protein (YAP), and PDE4D expression positively correlated with YAP expression in HCC. Overexpression of PDE4D increased YAP dephosphorylation and activity and promoted HCC cell growth in vitro and in vivo, which was attenuated by the YAP inhibitor verteporfin. In contrast, silencing PDE4D reduced YAP expression and HCC cell growth. Notably, forced expression of YAP promoted PDE4D and YAP target gene expression and cell growth, which were abrogated by the PDE4D inhibitor roflumilast. Mechanistically, silencing of YAP caused PDE4D downregulation and HCC cell apoptosis via extracellular signal-regulated kinase (ERK) activation. Roflumilast activated cAMP-PKA signaling and induced cAMP-PKA-dependent YAP phosphorylation at serine 127, resulting in YAP degradation and suppression of HCC growth, which were reversed by the PKA inhibitor PKI. Additionally, transfection of the YAP-S127A mutant reversed roflumilast-mediated suppression of YAP and cell growth. Taken together, our findings indicate that PDE4D binds to and interacts with YAP to promote HCC progression. Targeting the PDE4D-YAP interaction with roflumilast may be an effective strategy for HCC treatment.
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Affiliation(s)
- Huili Ren
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yingxiang Chen
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhou Ao
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qi Cheng
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaoyan Yang
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Hua Tao
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences and the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Lixin Zhao
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences and the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Ao Shen
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences and the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Peiyuan Li
- Department of Gastroenterology, Wenchang People's Hospital, Hainan, China; Division of Gastroenterology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Qin Fu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China.
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Yang T, Yue G, Ge Y, Zhang Y, Xu P, Wang Y, Li B, Di B. SCH 23390 inhibits the acquisition of nitrous oxide-induced conditioned place preference and the changes in ERK phosphorylation expression in nucleus accumbens of mice. Neurosci Lett 2022;:136674. [PMID: 35525502 DOI: 10.1016/j.neulet.2022.136674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 04/27/2022] [Accepted: 04/29/2022] [Indexed: 12/15/2022]
Abstract
Nitrous oxide (N2O) has a long history of abuse, but its abuse mechanism has not been clear yet. This research aimed at the possibility of mesolimbic dopaminergic system (MLDS) involved in the rewarding effect of N2O. In this work, the rewarding behavior of N2O in mice was evaluated using a typical gas-administered conditioned place preference (CPP) procedure. SCH 23390, a Dopamine D1 receptor (D1R) antagonist, and Haloperidol, a Dopamine D2 receptor (D2R) antagonist were administered during CPP to evaluate the role of dopamine receptors in the N2O-induced CPP. The accompanying changes in phosphorylation of extracellular signal-regulated kinase (ERK) in MLDS related brain regions, including the ventral tegmental area (VTA), caudate putamen (CPu), prefrontal cortex (PFC), and nucleus accumbens (NAc) were measured to assess the neural plasticity changes in the CPP mice by Western blot analysis. Results revealed that 60% N2O induced CPP in the gas-administered mice and promoted the ERK phosphorylation (p-ERK) in the NAc and CPu during the test session of the CPP test. Pretreatment of SCH 23390 (0.5mg/kg) inhibited the acquisition of N2O-induced CPP and the enhanced p-ERK in NAc.It suggested that Dopamine D1 receptor may play an important role in the acquisition of N2O-induced CPP and the accompanied ERK activation in the NAc, which provide insight into the molecular mechanism in the rewarding properties of nitrous oxide.
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22
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Fukuyama K, Okada M. High frequency oscillations play important roles in development of epileptogenesis/ictogenesis via activation of astroglial signallings. Biomed Pharmacother 2022; 149:112846. [PMID: 35325849 DOI: 10.1016/j.biopha.2022.112846] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/16/2022] [Accepted: 03/18/2022] [Indexed: 11/24/2022] Open
Abstract
To explore developmental processes of epileptogenesis/ictogenesis and pathophysiology of carbamazepine-resistant epilepsy, we determined effects of high-frequency-oscillation (HFO) on glutamatergic tripartite-synaptic transmission, astroglial expression of connexin43, and intracellular Erk- and Akt-signalling, using genetic rat model (S286L-TG) of autosomal-dominant sleep-related hypermotor epilepsy(ADSHE), which bears rat S286L-mutant Chrna4(corresponding to human S284L-mutant CHRNA4). Artificial physiological ripple- and pathological fast-ripple-burst stimulations use-dependently increased L-glutamate release through connexin43-containing hemichannels by enhancing Erk-signalling alone or both ERK- and Akt-signalling together, respectively. Stimulatory effects of HFO-bursts on astroglial L-glutamate release were enhanced by increasing extracellular K+ levels, Akt- and Erk-signalling-dependently. HFO-bursts also activated connexin43 expression and Akt- and Erk-signallings use-dependently. Extracellular pH elevation enhanced HFO-burst-evoked astroglial L-glutamate release, which was suppressed by therapeutically-relevant concentration of zonisamide via possible carbonic-anhydrase inhibition, but not by that of carbamazepine. Unexpectedly, these responses of S286L-TG to HFO-bursts were almost equal to those of wild-type astrocytes. These results indicated that candidate pathomechanism/pathophysiology of carbamazepine-resistant ADSHE, which enhanced HFO-bursts in S286L-TG neurons may contribute to epileptogenesis/ictogenesis development via activation of connexin43-associated astroglial transmission, which was directly unaffected by mutation, and induced through activated Erk-signalling, followed by Akt-signalling. Therefore, suppression of overexpressed Erk-signalling probably prevents ADSHE onset via indirect inhibition of mutant CHRNA4-associated pathomechanistic developments.
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Tokunaga N, Takimoto T, Nakamura Y, Hisaoka-Nakashima K, Morioka N. Downregulation of connexin 43 potentiates amitriptyline-induced brain-derived neurotrophic factor expression in primary astrocytes through lysophosphatidic acid receptor 1/3, Src, and extracellular signal-regulated kinase. Eur J Pharmacol 2022; 925:174986. [PMID: 35490723 DOI: 10.1016/j.ejphar.2022.174986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 12/08/2021] [Revised: 04/21/2022] [Accepted: 04/25/2022] [Indexed: 01/07/2023]
Abstract
Connexin 43 (Cx43) expression is decreased in the prefrontal cortex of patients with depression, but its significance is still unknown. Neurotrophic factors, such as brain-derived neurotrophic factor (BDNF), are involved in the effects of antidepressant. However, the relationship between Cx43 expression and induction of brain-derived neurotrophic factor production by antidepressants is unknown. On the basis of our previous study, which showed that adrenergic receptors stimulation results in potentiation of BDNF expression in astrocytes with downregulated Cx43 expression, we investigated the induction of BDNF expression by amitriptyline, a tricyclic antidepressant, in Cx43-knockdown astrocytes. Amitriptyline treatment potentiated BDNF expression in Cx43-knockdown astrocytes compared with those treated with non-targeting small interfering RNA (siRNA). Using a pharmacological approach, we revealed that the potentiating effect of amitriptyline on BDNF expression was mediated by lysophosphatidic acid (LPA) receptor1/3 (LPA1/3) stimulation and subsequent activation of Src-extracellular signal-regulated kinase (ERK) signaling. These findings suggest that downregulation of Cx43 in patients with depression might contribute to the therapeutic efficacy of antidepressants rather than the pathogenesis of depression.
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Affiliation(s)
- Nozomi Tokunaga
- Department of Pharmacology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima, 734-8553, Japan
| | - Tomoyo Takimoto
- Department of Pharmacology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima, 734-8553, Japan
| | - Yoki Nakamura
- Department of Pharmacology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima, 734-8553, Japan
| | - Kazue Hisaoka-Nakashima
- Department of Pharmacology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima, 734-8553, Japan
| | - Norimitsu Morioka
- Department of Pharmacology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima, 734-8553, Japan.
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24
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Dai X, Wang Y, Li Y, Zhong Y, Pei M, Long J, Dong X, Chen YL, Wang Q, Wang G, Gold BG, Vandenbark AA, Neve KA, Offner H, Wang C. Tyrphostin A9 protects axons in experimental autoimmune encephalomyelitis through activation of ERKs. Life Sci 2022; 294:120383. [PMID: 35143827 PMCID: PMC8920308 DOI: 10.1016/j.lfs.2022.120383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 02/02/2022] [Accepted: 02/03/2022] [Indexed: 11/17/2022]
Abstract
AIMS Small molecule compound tyrphostin A9 (A9), an inhibitor of platelet-derived growth factor (PDGF) receptor, was previously reported by our group to stimulate extracellular signal-regulated kinase 1 (ERK1) and 2 (ERK2) in neuronal cells in a PDGF receptor-irrelevant manner. The study aimed to investigate whether A9 could protect axons in experimental autoimmune encephalomyelitis through activation of ERKs. MAIN METHODS A9 treatment on the protection on neurite outgrowth in SH-SY5Y neuroblastoma cells and primary substantia nigra neuron cultures from the neurotoxin MPP+ were analyzed. Then, clinical symptoms as well as ERK1/2 activation, axonal protection induction, and the abundance increases of the regeneration biomarker GAP-43 in the CNS in the relapsing-remitting experimental autoimmune encephalomyelitis (EAE) model were verified. KEY FINDINGS A9 treatment could stimulate neurite outgrowth in SH-SY5Y neuroblastoma cells and protect primary substantia nigra neuron cultures from the neurotoxin MPP+. In the relapsing-remitting EAE model, oral administration of A9 successfully ameliorated clinical symptoms, activated ERK1/2, induced axonal protection, and increased the abundance of the regeneration biomarker GAP-43 in the CNS. Interestingly, gene deficiency of ERK1 or ERK2 disrupted the beneficial effects of A9 in MOG-35-55-induced EAE. SIGNIFICANCE These results demonstrated that small molecule compounds that stimulate persistent ERK activation in vitro and in vivo may be useful in protective or restorative treatment for neurodegenerative diseases.
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MESH Headings
- Animals
- Axons/drug effects
- Disease Models, Animal
- Encephalomyelitis, Autoimmune, Experimental/etiology
- Encephalomyelitis, Autoimmune, Experimental/metabolism
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Encephalomyelitis, Autoimmune, Experimental/prevention & control
- Extracellular Signal-Regulated MAP Kinases/genetics
- Extracellular Signal-Regulated MAP Kinases/metabolism
- Female
- Gene Expression Regulation/drug effects
- Humans
- Mice
- Mice, Inbred C57BL
- Neuroblastoma/drug therapy
- Neuroblastoma/metabolism
- Neuroblastoma/pathology
- Rats
- Rats, Sprague-Dawley
- Tyrphostins/pharmacology
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Affiliation(s)
- Xiaodong Dai
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200126, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yongmei Wang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200126, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yuexin Li
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239, United States of America; Research Service, VA Portland Health Care System, Portland, OR 97239, United States of America
| | - Yongping Zhong
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239, United States of America
| | - Min Pei
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200126, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jing Long
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200126, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xingchen Dong
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200126, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yi-Li Chen
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200126, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Qi Wang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200126, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Guifeng Wang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200126, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
| | - Bruce G Gold
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239, United States of America
| | - Arthur A Vandenbark
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239, United States of America; Department of Molecular Microbiology & Immunology, Oregon Health & Science University, Portland, OR 97239, United States of America; Research Service, VA Portland Health Care System, Portland, OR 97239, United States of America
| | - Kim A Neve
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR 97239, United States of America; Research Service, VA Portland Health Care System, Portland, OR 97239, United States of America
| | - Halina Offner
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239, United States of America; Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR 97239, United States of America; Research Service, VA Portland Health Care System, Portland, OR 97239, United States of America
| | - Chunhe Wang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200126, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; Department of Neurology, Oregon Health & Science University, Portland, OR 97239, United States of America; Research Service, VA Portland Health Care System, Portland, OR 97239, United States of America.
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Yu H, Zhou C, Hu D, Li C, Wang Q, Xue W, Peng A. Uremic toxin indoxyl sulfate induces dysfunction of vascular smooth muscle cells via integrin-β1/ERK signaling pathway. Clin Exp Nephrol 2022; 26:640-648. [PMID: 35333997 DOI: 10.1007/s10157-022-02195-z] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 02/03/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Protein-bound uremic toxins (PBUTs) are reported to be one of the major culprits in chronic kidney disease-cardiovascular disease (CKD-CVD) development, yet its mechanism is not fully clear. Our previous study confirmed elevated expression of integrin-β1 (ITGβ1) in vascular smooth muscle cells of uremic patients. Thus, this study aimed to explore the relationship between PBUTs and ITGβ1 in uremic vasculature injury. METHODS Human umbilical vein smooth muscle cells (HUVSMCs) and endothelial cells (HUVECs) were treated with two representative PUBTs, indoxyl sulfate (IS) and p-cresyl sulfate (PC). Both cells were measured for the expression of ITGβ1 and downstream signaling pathways and assayed for proliferation, migration, adhesion and apoptosis. RESULTS The IS treatments were observed with significantly up-regulated ITGβ1 in HUVSMCs but not in HUVECs, while PC did not induce ITGβ1 alteration in either HUVSMCs or HUVECs. Furthermore, overexpression of ITGβ1 revealed activated downstream signal-regulated kinase (ERK) signaling pathway with promoted focal adhesion, migration, proliferation but no apoptosis in HUVSMCs by IS. These functional and pathway alterations could be significantly suppressed by RNA interference of ITGβ1. More importantly, the application of ERK1/2 inhibitor significantly suppressed the focal adhesion, migration and proliferation of HUVSMCs. CONCLUSION We first demonstrated that ITGβ1/ERK signaling pathway mediated abnormal focal adhesion, migration and proliferation of vascular smooth muscle cells stimulated by IS. ITGβ1/ERK signaling may serve as a novel therapeutic target for CKD-CVD.
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Affiliation(s)
- Haibo Yu
- Division of Nephrology, Center for Nephrology and Clinical Metabolomics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Chunyu Zhou
- Division of Nephrology, Center for Nephrology and Clinical Metabolomics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Dayong Hu
- Division of Nephrology, Center for Nephrology and Clinical Metabolomics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Changbin Li
- Division of Nephrology, Center for Nephrology and Clinical Metabolomics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Qiang Wang
- Department of Nephrology, Qilu Hospital of Shandong University (Qingdao), Qingdao, People's Republic of China
| | - Wen Xue
- Division of Nephrology, Center for Nephrology and Clinical Metabolomics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China.
| | - Ai Peng
- Division of Nephrology, Center for Nephrology and Clinical Metabolomics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China.
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Zhang M, Cheng LH, Yin XT, Luo H, Cai C. Protective effect of adrenomedullin on hyperoxia-induced lung injury. Zhongguo Dang Dai Er Ke Za Zhi 2021; 23:1282-8. [PMID: 34911614 DOI: 10.7499/j.issn.1008-8830.2109005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVES To study the role of adrenomedullin (ADM) in hyperoxia-induced lung injury by examining the effect of ADM on the expression of calcitonin receptor-like receptor (CRLR), receptor activity-modifying protein 2 (RAMP2), extracellular signal-regulated kinase (ERK), and protein kinase B (PKB) in human pulmonary microvascular endothelial cells (HPMECs) under different experimental conditions. METHODS HPMECs were randomly divided into an air group and a hyperoxia group (n=3 each).The HPMECs in the hyperoxia group were cultured in an atmosphere of 92% O2 (3 L/minute) +5% CO2. RT-qPCR and Western blot were used to measure the mRNA and protein expression levels of ADM, CRLR, RAMP2, ERK1/2, and PKB. Other HPMECs were divided into a non-interference group and an interference group (n=3 each), and the mRNA and protein expression levels of ADM, ERK1/2, and PKB were measured after the HPMECs in the interference group were transfected with ADM siRNA. RESULTS Compared with the air group, the hyperoxia group had significant increases in the mRNA and protein expression levels of ADM, CRLR, RAMP2, ERK1/2, and PKB (P<0.05). Compared with the non-interference group, the interference group had significant reductions in the mRNA and protein expression levels of ADM, ERK1/2, and PKB (P<0.05). CONCLUSIONS ERK1/2 and PKB may be the downstream targets of the ADM signaling pathway. ADM mediates the ERK/PKB signaling pathway by regulating CRLR/RAMP2 and participates in the protection of hyperoxia-induced lung injury.
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Malik C, Siddiqui SI, Ghosh S. Extracellular Signal-Regulated Kinase1 (ERK1)-Mediated Phosphorylation of Voltage-Dependent Anion Channel (VDAC) Suppresses its Conductance. J Membr Biol 2021; 255:107-116. [PMID: 34731249 DOI: 10.1007/s00232-021-00205-x] [Citation(s) in RCA: 3] [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: 05/23/2021] [Accepted: 10/18/2021] [Indexed: 12/12/2022]
Abstract
ERK1 is one of the members of the mitogen-activated protein kinases that regulate important cellular functions. VDAC is located at the outer membrane of mitochondria. Here, an interaction between VDAC and ERK1 has been studied on an artificial planar lipid bilayer using in vitro electrophysiology experiments. We report that VDAC is phosphorylated by ERK1 in the presence of Mg2+-ATP and its single-channel currents are inhibited on the artificial bilayer membrane. Treatment of Alkaline phosphatase on ERK1 phosphorylated VDAC leads to partial recovery of the single-channel VDAC currents. Later, phosphorylation of VDAC was demonstrated by Pro-Q diamond dye. Mass Spectrometric studies indicate phosphorylation of VDAC at Threonine 33, Threonine 55, and Serine 35. In a nutshell, phosphorylation of VDAC leads to the closure of the channel.
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Affiliation(s)
- Chetan Malik
- Department of Biophysics, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Shumaila Iqbal Siddiqui
- Department of Biophysics, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Subhendu Ghosh
- Department of Biophysics, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India.
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Wang GJ, Zhang X, Huang LD, Xiao Y. Involvement of the Sodium Channel Nav1.7 in Paclitaxel-induced Peripheral Neuropathy through ERK1/2 Signaling in Rats. Curr Neurovasc Res 2021; 17:267-274. [PMID: 32407275 DOI: 10.2174/1567202617666200514113441] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 02/18/2020] [Revised: 03/02/2020] [Accepted: 03/07/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Paclitaxel treatment is a major cause of chemotherapy-induced peripheral neuropathy. The sodium channel Nav1.7 plays a critical role in pain perception. However, whether Nav1.7 in the dorsal root ganglion (DRG) is involved in paclitaxel-induced peripheral neuropathy remains unclear. Thus, our study aimed to evaluate whether Nav1.7 participates in the pathogenesis of paclitaxel-induced neuropathy. METHODS Paclitaxel-induced peripheral neuropathy was generated by intraperitoneal administration of paclitaxel on four alternate days. RESULTS The results showed that DRG mRNA and protein expression levels of Nav1.7 were upregulated between days 7 and 21 after the administration of paclitaxel. Besides, paclitaxel upregulated extracellular signal-regulated kinase (ERK1/2) phosphorylation in DRG. Intrathecal injection of U0126 (a MEK inhibitor) blocking ERK1/2 phosphorylation blunted up-regulation of Nav1.7 in the DRG and correspondingly attenuated hyperalgesia. CONCLUSION These results indicated that the sodium channel Nav1.7 in the DRG exerted an important function in paclitaxel-induced neuropathy, which was associated with ERK phosphorylation in neurons.
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Affiliation(s)
- Guang Jie Wang
- Department of Anesthesiology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, China
| | - Xi Zhang
- Department of Anesthesiology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, China
| | - Li-De Huang
- Department of Anesthesiology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, China
| | - Yun Xiao
- Department of Anesthesiology, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, China
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Cucinello-Ragland JA, Mitchell-Cleveland R, Bradley Trimble W, Urbina AP, Yeh AY, Edwards KN, Molina PE, Simon Peter L, Edwards S. Alcohol amplifies cingulate cortex signaling and facilitates immobilization-induced hyperalgesia in female rats. Neurosci Lett 2021; 761:136119. [PMID: 34280506 PMCID: PMC8387454 DOI: 10.1016/j.neulet.2021.136119] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 07/14/2021] [Indexed: 12/28/2022]
Abstract
Complex Regional Pain Syndrome (CRPS) is a musculoskeletal pain condition that often develops after limb injury and/or immobilization. Although the exact mechanisms underlying CRPS are unknown, the syndrome is associated with central and autonomic nervous system dysregulation and peripheral hyperalgesia symptoms. These symptoms also manifest in alcoholic neuropathy, suggesting that the two conditions may be pathophysiologically accretive. Interestingly, people assigned female at birth (AFAB) appear to be more sensitive to both CRPS and alcoholic neuropathy. To better understand the biobehavioral mechanisms underlying these conditions, we investigated a model of combined CRPS and alcoholic neuropathy in female rats. Animals were pair-fed either a Lieber-DeCarli alcohol liquid diet or a control diet for ten weeks. CRPS was modeled via unilateral hind limb cast immobilization for seven days, allowing for the other limb to serve as a within-subject control for hyperalgesia measures. To investigate the role of circulating ovarian hormones on pain-related behaviors, half of the animals underwent ovariectomy (OVX). Using the von Frey procedure to record mechanical paw withdrawal thresholds, we found that cast immobilization and chronic alcohol drinking separately and additively produced mechanical hyperalgesia observed 3 days after cast removal. We then examined neuroadaptations in AMPA GluR1 and NMDA NR1 glutamate channel subunits, extracellular signal-regulated kinase (ERK), and cAMP response element-binding protein (CREB) in bilateral motor and cingulate cortex across all groups. Consistent with increased pain-related behavior, chronic alcohol drinking increased GluR1, NR1, ERK, and CREB phosphorylation in the cingulate cortex. OVX did not alter any of the observed effects. Our results suggest accretive relationships between CRPS and alcoholic neuropathy symptoms and point to novel therapeutic targets for these conditions.
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Affiliation(s)
- Jessica A Cucinello-Ragland
- Department of Physiology and School of Medicine, LSU Health-New Orleans, United States; Alcohol & Drug Abuse Center of Excellence, LSU Health-New Orleans, United States
| | | | - W Bradley Trimble
- Department of Physiology and School of Medicine, LSU Health-New Orleans, United States
| | - Amy P Urbina
- Department of Physiology and School of Medicine, LSU Health-New Orleans, United States
| | - Alice Y Yeh
- Department of Physiology and School of Medicine, LSU Health-New Orleans, United States
| | - Kimberly N Edwards
- Department of Physiology and School of Medicine, LSU Health-New Orleans, United States; Alcohol & Drug Abuse Center of Excellence, LSU Health-New Orleans, United States
| | - Patricia E Molina
- Department of Physiology and School of Medicine, LSU Health-New Orleans, United States; Alcohol & Drug Abuse Center of Excellence, LSU Health-New Orleans, United States; Comprehensive Alcohol-HIV/AIDS Research Center, LSU Health-New Orleans, United States
| | - Liz Simon Peter
- Department of Physiology and School of Medicine, LSU Health-New Orleans, United States; Alcohol & Drug Abuse Center of Excellence, LSU Health-New Orleans, United States; Comprehensive Alcohol-HIV/AIDS Research Center, LSU Health-New Orleans, United States
| | - Scott Edwards
- Department of Physiology and School of Medicine, LSU Health-New Orleans, United States; Alcohol & Drug Abuse Center of Excellence, LSU Health-New Orleans, United States; Neuroscience Center of Excellence, LSU Health-New Orleans, United States; Comprehensive Alcohol-HIV/AIDS Research Center, LSU Health-New Orleans, United States.
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Zhang M, Spencer HF, Berman RY, Radford KD, Choi KH. Effects of subanesthetic intravenous ketamine infusion on neuroplasticity-related proteins in male and female Sprague-Dawley rats. IBRO Neurosci Rep 2021; 11:42-51. [PMID: 34286313 PMCID: PMC8273220 DOI: 10.1016/j.ibneur.2021.06.005] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 06/29/2021] [Accepted: 06/30/2021] [Indexed: 10/30/2022] Open
Abstract
Although ketamine, a multimodal dissociative anesthetic, is frequently used for analgesia and treatment-resistant major depression, molecular mechanisms of ketamine remain unclear. Specifically, differences in the effects of ketamine on neuroplasticity-related proteins in the brains of males and females need further investigation. In the current study, adult male and female Sprague-Dawley rats with an indwelling jugular venous catheter received an intravenous ketamine infusion (0, 10, or 40 mg/kg, 2-h), starting with a 2 mg/kg bolus for ketamine groups. Spontaneous locomotor activity was monitored by infrared photobeams during the infusion. Two hours after the infusion, brain tissue was dissected to obtain the medial prefrontal cortex (mPFC), hippocampus including the CA1, CA3, and dentate gyrus, and amygdala followed by Western blot analyses of a transcription factor (c-Fos), brain-derived neurotrophic factor (BDNF), and phosphorylated extracellular signal-regulated kinase (pERK). The 10 mg/kg ketamine infusion suppressed locomotor activity in male and female rats while the 40 mg/kg infusion stimulated activity only in female rats. In the mPFC, 10 mg/kg ketamine reduced pERK levels in male rats while 40 mg/kg ketamine increased c-Fos levels in male and female rats. Female rats in proestrus/estrus phases showed greater ketamine-induced c-Fos elevation as compared to those in diestrus phase. In the amygdala, 10 and 40 mg/kg ketamine increased c-Fos levels in female, but not male, rats. In the hippocampus, 10 mg/kg ketamine reduced BDNF levels in male, but not female, rats. Taken together, the current data suggest that subanesthetic doses of intravenous ketamine infusions produce differences in neuroplasticity-related proteins in the brains of male and female rats.
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Affiliation(s)
- Michael Zhang
- Department of Psychiatry, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, USA.,Center for the Study of Traumatic Stress, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Haley F Spencer
- Program in Neuroscience, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Rina Y Berman
- Department of Psychiatry, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, USA.,Center for the Study of Traumatic Stress, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Kennett D Radford
- Daniel K. Inouye Graduate School of Nursing, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Kwang H Choi
- Department of Psychiatry, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, USA.,Center for the Study of Traumatic Stress, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, USA.,Program in Neuroscience, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, USA.,Daniel K. Inouye Graduate School of Nursing, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
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Tseng YT, Chen M, Lai R, Oieni F, Smyth G, Anoopkumar-Dukie S, St John J, Ekberg J. Liraglutide modulates olfactory ensheathing cell migration with activation of ERK and alteration of the extracellular matrix. Biomed Pharmacother 2021; 141:111819. [PMID: 34126351 DOI: 10.1016/j.biopha.2021.111819] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 04/07/2021] [Revised: 05/31/2021] [Accepted: 06/07/2021] [Indexed: 02/07/2023] Open
Abstract
Transplantation of olfactory ensheathing cells (OECs) is a promising approach for repairing the injured nervous system that has been extensively trialed for nervous system repair. However, the method still needs improvement and optimization. One avenue of improving outcomes is to stimulate OEC migration into the injury site. Liraglutide is a glucagon-like peptide-1 receptor agonist used for management of diabetes and obesity. It has been shown to be neuroprotective and to promote cell migration, but whether it can stimulate glial cells remains unknown. In the current study, we investigated the effects of liraglutide on OEC migration and explored the involved mechanisms. We showed that liraglutide at low concentration (100 nM) overall promoted OEC migration over time. Liraglutide modulated the migratory behavior of OECs by reducing time in arrest, and promoted random rather than straight migration. Liraglutide also induced a morphological change of primary OECs towards a bipolar shape consistent with improved migration. We found that liraglutide activated extracellular signal-regulated kinase (ERK), which has key roles in cell migration; the timing of ERK activation correlated with stimulation of migration. Furthermore, liraglutide also modulated the extracellular matrix by upregulating laminin-1 and down-regulating collagen IV. In summary, we found that liraglutide can stimulate OEC migration and re-model the extracellular matrix to better promote cell migration, and possibly also to become more conducive for axonal regeneration. Thus, liraglutide may improve OEC transplantation outcomes.
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Affiliation(s)
- Yu-Ting Tseng
- Menzies Health Institute Queensland, Griffith University, Southport, QLD 4222, Australia; Clem Jones Centre for Neurobiology and Stem Cell Research, Griffith University, Brisbane, QLD 4111, Australia
| | - Mo Chen
- Menzies Health Institute Queensland, Griffith University, Southport, QLD 4222, Australia; Clem Jones Centre for Neurobiology and Stem Cell Research, Griffith University, Brisbane, QLD 4111, Australia
| | - Richard Lai
- Menzies Health Institute Queensland, Griffith University, Southport, QLD 4222, Australia
| | - Francesca Oieni
- Menzies Health Institute Queensland, Griffith University, Southport, QLD 4222, Australia; Clem Jones Centre for Neurobiology and Stem Cell Research, Griffith University, Brisbane, QLD 4111, Australia
| | - Graham Smyth
- Menzies Health Institute Queensland, Griffith University, Southport, QLD 4222, Australia; Clem Jones Centre for Neurobiology and Stem Cell Research, Griffith University, Brisbane, QLD 4111, Australia
| | | | - James St John
- Menzies Health Institute Queensland, Griffith University, Southport, QLD 4222, Australia; Clem Jones Centre for Neurobiology and Stem Cell Research, Griffith University, Brisbane, QLD 4111, Australia; Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia.
| | - Jenny Ekberg
- Menzies Health Institute Queensland, Griffith University, Southport, QLD 4222, Australia; Clem Jones Centre for Neurobiology and Stem Cell Research, Griffith University, Brisbane, QLD 4111, Australia; School of Pharmacy and Medical Sciences, Griffith University, Southport, QLD 4222, Australia; Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia.
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Du K, Wang Z, Zhang H, Zhang Y, Su H, Wei Z, Zhang C, Yun K, Cong B. Levo-tetrahydropalmatine attenuates the acquisition of fentanyl-induced conditioned place preference and the changes in ERK and CREB phosphorylation expression in mice. Neurosci Lett 2021; 756:135984. [PMID: 34029649 DOI: 10.1016/j.neulet.2021.135984] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 04/08/2021] [Revised: 05/18/2021] [Accepted: 05/19/2021] [Indexed: 11/29/2022]
Abstract
Levo-tetrahydropalmatine (L-THP) is the main active ingredient of Corydalis and Stephania and is widely used for its sedative, analgesic, and neuroleptic effects. Though L-THP is an antagonist of dopamine receptors and has been proven to be effective in treating drug addiction, its effect on fentanyl-induced reward learning still remains unclear. This experiment was designed to investigate the effects of L-THP on fentanyl-induced rewarding behavior through conditioned place preference (CPP) in mice. Western blot assays were used to dissect the accompanying changes in the phosphorylation of extracellular signal-regulated kinase (ERK) and cAMP response element binding protein (CREB) in related brain regions, including the hippocampus (Hip), caudate putamen (CPu), prefrontal cortex (PFC), and nucleus accumbens (NAc), which may mediate the effects of L-THP on fentanyl-induced CPP. The results revealed that fentanyl could induce CPP in mice at doses of 0.025 mg/kg, 0.05 mg/kg, 0.1 mg/kg, and 0.2 mg/kg, and L-THP could attenuate the acquisition of fentany-induced CPP at a dose of 10.0 mg/kg. The levels of p-ERK and p-CREB of the saline+fentanyl group (0.05 mg/kg) increased significantly in the Hip, NAc, and PFC compared to the saline+saline group. Furthermore, L-THP (10.0 mg/kg) co-administered with fentanyl during conditioning prevented the enhanced phosphorylation of ERK and CREB in the Hip, NAc, and PFC. Our research revealed that L-THP could suppress the rewarding properties of fentanyl-induced CPP, the inhibitory effect may be related to the suppression of ERK and CREB phosphorylation in the Hip, NAc, and PFC of mice. Thus, L-THP may have therapeutic potential for fentanyl addiction.
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Affiliation(s)
- Kaili Du
- Department of Forensic Medicine, Shanxi Medical University, Taiyuan, 030001, PR China
| | - Zhuoyi Wang
- Department of Forensic Medicine, Shanxi Medical University, Taiyuan, 030001, PR China
| | - Huimin Zhang
- Department of Forensic Medicine, Shanxi Medical University, Taiyuan, 030001, PR China
| | - Yaofang Zhang
- Department of Forensic Medicine, Shanxi Medical University, Taiyuan, 030001, PR China; Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, 030001, PR China
| | - Hongliang Su
- Department of Forensic Medicine, Shanxi Medical University, Taiyuan, 030001, PR China
| | - Zhiwen Wei
- Department of Forensic Medicine, Shanxi Medical University, Taiyuan, 030001, PR China
| | - Chao Zhang
- Department of Forensic Medicine, Shanxi Medical University, Taiyuan, 030001, PR China
| | - Keming Yun
- Department of Forensic Medicine, Shanxi Medical University, Taiyuan, 030001, PR China.
| | - Bin Cong
- Department of Forensic Medicine, Shanxi Medical University, Taiyuan, 030001, PR China; Department of Forensic Medicine, Hebei Medical University, Shijiazhuang, 050017, PR China.
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Jiang Y, Xiao H, Sun L, Zhang Y, Liu S, Luo B. LMP2A suppresses the role of AHR pathway through ERK signal pathway in EBV-associated gastric cancer. Virus Res 2021; 297:198399. [PMID: 33753181 DOI: 10.1016/j.virusres.2021.198399] [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: 09/23/2020] [Revised: 03/12/2021] [Accepted: 03/16/2021] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To investigate the function of the aryl hydrocarbon receptor (AHR) pathway in Epstein-Barr Virus (EBV)-associated gastric cancer (EBVaGC) and to explore the relationship between EBV and AHR expression. METHODS The expression of AHR in EBVaGC and EBV negative GC (EBVnGC) tissues was detected by immunohistochemistry (IHC). Real-time qPCR (RT-qPCR) and Western blot analysis were used to examine the expression of AHR, cytochrome P450 1A1 (CYP1A1), and cytochrome P450 1B1 (CYP1B1) in gastric cancer cells. The cell proliferation and migration assay were tested by CCK8 and transwell analysis. EBV-encoded latent membrane protein 2A (LMP2A) was over-expressed in SGC7901 cells and silenced in AGS-EBV cells to further identify its role in EBV positive GC cells. RESULTS It was found that EBV infection inhibited the expression of AHR in gastric cancer tissues and cell lines. We also found that the activation of AHR pathway can promote cell proliferation and migration. However, the function was restricted in EBVaGC cell lines compared with EBVnGC. LMP2A can suppress AHR expression and pathway activation by activating phosphorylation of extracellular signal-regulated kinase (ERK) in EBV positive GC cell lines. CONCLUSION EBV-encoded LMP2A regulated the function of the AHR pathway by activating the ERK signal pathway in EBV positive GC cell lines.
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Affiliation(s)
- Yuanyuan Jiang
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, 308 Ningxia Road, Qingdao, 266021, China; Department of Medical Affairs of the Affiliated Hospital of Qingdao University, No. 1677 Wutaishan Road, Qingdao, 266000, China
| | - Hua Xiao
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, 308 Ningxia Road, Qingdao, 266021, China
| | - Lingling Sun
- Department of Pathology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, China
| | - Yan Zhang
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, 308 Ningxia Road, Qingdao, 266021, China; Department of Clinical Laboratory, Central Hospital of Zibo, 19 Gongqingtuan Road, ZiBo, 255036, China
| | - Shuzhen Liu
- Department of Medical Affairs of the Affiliated Hospital of Qingdao University, No. 1677 Wutaishan Road, Qingdao, 266000, China.
| | - Bing Luo
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, 308 Ningxia Road, Qingdao, 266021, China
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Conradi C, Obatake N, Shiu A, Tang X. Dynamics of ERK regulation in the processive limit. J Math Biol 2021; 82:32. [PMID: 33694015 DOI: 10.1007/s00285-021-01574-6] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 09/01/2020] [Accepted: 02/13/2021] [Indexed: 10/21/2022]
Abstract
We consider a model of extracellular signal-regulated kinase regulation by dual-site phosphorylation and dephosphorylation, which exhibits bistability and oscillations, but loses these properties in the limit in which the mechanisms underlying phosphorylation and dephosphorylation become processive. Our results suggest that anywhere along the way to becoming processive, the model remains bistable and oscillatory. More precisely, in simplified versions of the model, precursors to bistability and oscillations (specifically, multistationarity and Hopf bifurcations, respectively) exist at all "processivity levels". Finally, we investigate whether bistability and oscillations can exist together.
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Affiliation(s)
| | - Nida Obatake
- Department of Mathematics, Texas A&M University, College Station, USA
| | - Anne Shiu
- Department of Mathematics, Texas A&M University, College Station, USA
| | - Xiaoxian Tang
- Department of Mathematics, Texas A&M University, College Station, USA. .,School of Mathematical Sciences, Beihang University, Beijing, China.
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Wang B, Zhu Y, Liu L, Wang B, Chen M, Wang J, Yang L, Liu J. Enterovirus 71 induces autophagy in mice via mTOR inhibition and ERK pathway activation. Life Sci 2021; 271:119188. [PMID: 33581126 DOI: 10.1016/j.lfs.2021.119188] [Citation(s) in RCA: 1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 02/01/2021] [Accepted: 02/02/2021] [Indexed: 10/22/2022]
Abstract
AIMS Enterovirus 71 (EV71) is one of the main viruses that cause hand-foot-mouth disease; however, its pathogenic mechanism remains unclear. This study characterized the relationship between EV71 infection and autophagy in vivo and explored the molecular mechanism underlying EV71-induced autophagy. MATERIALS AND METHODS A mouse model of EV71 infection was prepared by intraperitoneally injecting one-day-old BALB/c suckling mice with 30 μL/g of EV71 virus stock solution for 3 days. The behavior, fur condition, weight, and mice mortality were monitored, and disease scores were calculated. The pathological damage to the brain, lung, and muscle tissues after the viral infection was assessed by hematoxylin and eosin staining. Western blot and immunofluorescence analyses were used to detect the expression levels of viral protein 1, Beclin-1, microtubule-associated protein light chain 3B, mammalian target of rapamycin (mTOR), phosphorylated (p)-mTOR, extracellular signal-regulated protein kinase (ERK) 1/2, and p-ERK. KEY FINDINGS EV71 infection can trigger autophagy in the brains, lungs, and muscles of infected mice. The autophagy response triggered by EV71 is achieved by the simultaneous mTOR inhibition and the ERK pathway activation. Blocking the mTOR pathway may aggravate autophagy, whereas ERK inhibition alleviates autophagy but cannot completely prevent it. SIGNIFICANCE EV71 infection can induce autophagy in mice, involving mTOR and ERK signaling pathways. These two signaling pathways are independent and do not interfere with each other.
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Affiliation(s)
- Baixin Wang
- School of Basic Medicine, Jiamusi University, Jiamusi 154007, China
| | - Yuanzhi Zhu
- School of Basic Medicine, Jiamusi University, Jiamusi 154007, China
| | - Lei Liu
- School of Basic Medicine, Jiamusi University, Jiamusi 154007, China
| | - Binshan Wang
- School of Basic Medicine, Jiamusi University, Jiamusi 154007, China
| | - Mei Chen
- School of Basic Medicine, Jiamusi University, Jiamusi 154007, China
| | - Jingtao Wang
- School of Basic Medicine, Jiamusi University, Jiamusi 154007, China
| | - Limin Yang
- School of Medicine, Dalian University, Dalian 116622, China.
| | - JiGuang Liu
- School of Basic Medicine, Jiamusi University, Jiamusi 154007, China.
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Lin H, Weng J, Mei H, Zhuang M, Xiao X, Du F, Lin L, Wu J, Chen Z, Huang Y, Chen F, Wang X. 5-Lipoxygenase promotes epithelial-mesenchymal transition through the ERK signaling pathway in gastric cancer. J Gastroenterol Hepatol 2021; 36:455-466. [PMID: 32667711 DOI: 10.1111/jgh.15184] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 06/21/2020] [Accepted: 07/07/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND AIM 5-Lipoxygenase has been reported to enhance cell proliferation, migration, and invasion. Epithelial-mesenchymal transition is considered an important process for tumor metastasis and invasion. METHODS The 5-lipoxygenase expression levels and the prognoses in patients with gastric cancer were evaluated by immunohistochemistry and by the log-rank test on Kaplan-Meier curves. We established 5-lipoxygenase-overexpressed and 5-lipoxygenase-silenced gastric cancer cells and measured migration, invasion, and epithelial-mesenchymal transition makers to examine the role of 5-lipoxygenase in gastric cancer in vitro. In vivo, 5-lipoxygenase-overexpressed gastric cancer cells were administered into mice by subcutaneous injection, intraperitoneal injection or splenic intravenous injection to study the proliferation or metastasis of 5-lipoxygenase in mice. Using the extracellular signal-regulated kinase pathway inhibitor U0126 and activator tumor growth factor-β, we investigated the mechanism of epithelial-mesenchymal transition induced by 5-lipoxygenase in gastric cancer cells. RESULTS 5-Lipoxygenase was upregulated in gastric cancer tissues and was related to poor overall survival in gastric cancer patients. 5-Lipoxygenase promoted gastric cancer cell proliferation, migration, and invasion and induced the process of epithelial-mesenchymal transition in gastric cancer cells. In the nude mouse model, mice with gastric cancer tumors overexpressing 5-LOX had a faster tumor growth rate and more severe abdominal and liver metastases than the control group. Inhibition of extracellular signal-regulated kinase signaling by U0126 or activation by tumor growth factor-β neutralized the effect of 5-LOX overexpression or silencing on epithelial-mesenchymal transition. CONCLUSION 5-Lipoxygenase promotes epithelial-mesenchymal transition in gastric cancer by activating the extracellular signal-regulated kinase signaling pathway.
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Affiliation(s)
- Hao Lin
- Department of Gastroenterology, Fujian Medical University Union Hospital, Fuzhou, China.,Department of Medicine II, University Hospital, Liver Centre Munich, LMU, Munich, Germany.,Ludwig-Maximilians-Universität München, Germany
| | - Junyong Weng
- Department of Gastrointestinal Surgery, Changzheng Hospital, Second Military Medical University, Shanghai, China.,Department of General Surgery, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Haitao Mei
- Department of General Surgery, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Mingkai Zhuang
- Department of Gastroenterology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Xinzhu Xiao
- Department of Gastroenterology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Fan Du
- Department of Gastroenterology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Liying Lin
- Department of Gastroenterology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Juhua Wu
- Department of Gastroenterology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Zhixin Chen
- Department of Gastroenterology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Yuehong Huang
- Department of Gastroenterology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Fenglin Chen
- Department of Gastroenterology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Xiaozhong Wang
- Department of Gastroenterology, Fujian Medical University Union Hospital, Fuzhou, China
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Piao MJ, Kim KC, Kang KA, Fernando PDSM, Herath HMUL, Hyun JW. Phloroglucinol Attenuates Ultraviolet B-Induced 8-Oxoguanine Formation in Human HaCaT Keratinocytes through Akt and Erk-Mediated Nrf2/Ogg1 Signaling Pathways. Biomol Ther (Seoul) 2021; 29:90-97. [PMID: 32587122 PMCID: PMC7771840 DOI: 10.4062/biomolther.2020.059] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/15/2020] [Accepted: 05/19/2020] [Indexed: 12/19/2022] Open
Abstract
Ultraviolet B (UVB) radiation causes DNA base modifications. One of these changes leads to the generation of 8-oxoguanine (8-oxoG) due to oxidative stress. In human skin, this modification may induce sunburn, inflammation, and aging and may ultimately result in cancer. We investigated whether phloroglucinol (1,3,5-trihydroxybenzene), by enhancing the expression and activity of 8-oxoG DNA glycosylase 1 (Ogg1), had an effect on the capacity of UVB-exposed human HaCaT keratinocytes to repair oxidative DNA damage. Here, the effects of phloroglucinol were investigated using a luciferase activity assay, reverse transcription-polymerase chain reactions, western blot analysis, and a chromatin immunoprecipitation assay. Phloroglucinol restored Ogg1 activity and decreased the formation of 8-oxoG in UVB-exposed cells. Moreover, phloroglucinol increased Ogg1 transcription and protein expression, counteracting the UVB-induced reduction in Ogg1 levels. Phloroglucinol also enhanced the nuclear translocation of nuclear factor erythroid 2-related factor 2 (Nrf2) as well as Nrf2 binding to an antioxidant response element located in the Ogg1 gene promoter. UVB exposure inhibited the phosphorylation of protein kinase B (PKB or Akt) and extracellular signal-regulated kinase (Erk), two major enzymes involved in cell protection against oxidative stress, regulating the activity of Nrf2. Akt and Erk phosphorylation was restored by phloroglucinol in the UVB-exposed keratinocytes. These results indicated that phloroglucinol attenuated UVB-induced 8-oxoG formation in keratinocytes via an Akt/Erk-dependent, Nrf2/Ogg1-mediated signaling pathway.
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Affiliation(s)
- Mei Jing Piao
- Department of Biochemistry, College of Medicine, Jeju National University and Jeju Research Center for Natural Medicine, Jeju 63243, Republic of Korea
| | - Ki Cheon Kim
- National Center for Efficacy Evaluation of Respiratory Disease Product, Korea Institute of Toxicology, Jeongeup 56212, Republic of Korea
| | - Kyoung Ah Kang
- Department of Biochemistry, College of Medicine, Jeju National University and Jeju Research Center for Natural Medicine, Jeju 63243, Republic of Korea
| | | | | | - Jin Won Hyun
- Department of Biochemistry, College of Medicine, Jeju National University and Jeju Research Center for Natural Medicine, Jeju 63243, Republic of Korea
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Li YS, Zhang XR, Yu MJ, Hu XH, Yang JC, Huang Y, Luo GX, He WF. [Study on mechanisms of interleukin-17A regulating the expressions of interleukin-1β and interleukin-23 in mouse keratinocytes]. Zhonghua Shao Shang Za Zhi 2020; 36:923-9. [PMID: 33105944 DOI: 10.3760/cma.j.cn501120-20200619-00315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the mechanisms of interleukin-17A (IL-17A) regulating the expressions of IL-1β and IL-23 in mouse keratinocytes (KCs). Methods: Primary KCs were isolated from the skin of 400 newborn male and female wild type C57BL/6 mice and cultured in 24-well plates with Roswell Park Memorial Institute 1640 medium containing fetal bovine serum in the volume fraction of 10% for the following experiments. (1) The cells were divided into phosphate buffer solution (PBS) control group and IL-17A stimulation group according to the random number table (the same grouping method below), which were cultured with 10 μL PBS or 10 μL IL-17A in the mass concentration of 100 ng/mL for 6 hours, respectively. The expression levels of IL-1β and IL-23 mRNA in cells were detected by real-time fluorescence quantitative reverse transcription polymerase chain reaction (RT-PCR), with 3 samples in each group. (2) The cells were divided into dimethyl sulfoxide (DMSO) control group, IL-17A+ DMSO group, IL-17A+ nuclear factor κB (NF-κB) inhibitor group, IL-17A+ signal transduction and activator of transcription 3 (STAT3) inhibitor group, IL-17A+ extracellular signal-regulated kinase 1 (ERK1) inhibitor group, IL-17A+ ERK2 inhibitor group, and IL-17A+ c-Jun N-terminal kinase (JNK) inhibitor group. The reagents were added to cells in corresponding groups respectively and cultured for 6 hours. The volume of each reagent was 10 μL, the mass concentration of IL-17A was 100 ng/mL, and the molarity concentrations of NF-κB, STAT3, ERK1, ERK2, JNK signal pathway inhibitors PDTC, S3I-201, SCH772984, SCH772984, SP600125 were 5 μmol/L, 100 μmol/L, 4 nmol/L, 1 nmol/L, and 10 μmol/L, respectively. The expression levels of IL-1β mRNA and IL-23 mRNA in cells were detected by real-time fluorescence quantitative RT-PCR, with 3 samples in each group. (3) The cells were grouped and treated the same as those in experiment (1). The levels of NF-κB phosphorylation, STAT3 phosphorylation, ERK phosphorylation, and JNK phosphorylation were detected by Western blotting, with 3 samples in each group. Data were statistically analyzed with two-tailed Student t test, one-way analysis of variance, t test, and Bonferroni correction. Results: (1) After culture of 6 hours, compared with those in PBS control group, the expression levels of IL-1β and IL-23 mRNA in cells in IL-17A stimulation group were significantly increased (t=13.46, 6.72, P<0.01). (2) After culture of 6 hours, the expression levels of IL-1β and IL-23 mRNA in cells in DMSO control group, IL-17A+ DMSO group, IL-17A+ NF-κB inhibitor group, IL-17A+ STAT3 inhibitor group, IL-17A+ ERK1 inhibitor group, IL-17A+ ERK2 inhibitor group, and IL-17A+ JNK inhibitor group were 1.00±0.11, 4.01±0.32, 0.32±0.06, 1.76±0.43, 3.62±0.24, 3.80±0.43, 4.26±0.74 and 1.03±0.29, 4.08±0.34, 4.76±0.38, 4.70±0.21, 1.06±0.42, 0.92±0.21, 0.39±0.05, respectively. Compared with those in DMSO control group, the expression levels of IL-1β and IL-23 mRNA in cells in IL-17A+ DMSO group were significantly increased (t=9.24, 12.60, P<0.01). Compared with that in IL-17A+ DMSO group, the expression level of IL-1β mRNA was significantly decreased in cells in IL-17A+ NF-κB inhibitor group and IL-17A+ STAT3 inhibitor group (t=11.34, 6.91, P<0.01). Compared with that in IL-17A+ DMSO group, the expression level of IL-23 mRNA was significantly decreased in cells in IL-17A+ ERK1 inhibitor group, IL-17A+ ERK2 inhibitor group, and IL-17A+ JNK inhibitor group (t=12.44, 13.03, 15.21, P<0.01). (3) After culture of 6 hours, compared with those in PBS control group, the levels of NF-κB phosphorylation, STAT3 phosphorylation, ERK phosphorylation, and JNK phosphorylation in cells in IL-17A stimulation group were significantly increased. Conclusions: IL-17A promotes the transcription of IL-1β in mouse KCs through the phosphorylation of NF-κB and STAT3 pathways and IL-23 through the phosphorylation of ERK and JNK pathways.
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Choi C, Jeong W, Ghang B, Park Y, Hyun C, Cho M, Kim J. Cyr61 synthesis is induced by interleukin-6 and promotes migration and invasion of fibroblast-like synoviocytes in rheumatoid arthritis. Arthritis Res Ther 2020; 22:275. [PMID: 33228785 PMCID: PMC7685583 DOI: 10.1186/s13075-020-02369-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 06/10/2020] [Accepted: 11/05/2020] [Indexed: 12/17/2022] Open
Abstract
Background Interleukin-6 (IL-6) is involved in fibroblast-like synoviocyte (FLS) activation and promotes pannus formation and bone and cartilage destruction in rheumatoid arthritis (RA). Cysteine-rich 61 (Cyr61) protein regulates cell proliferation, migration, and differentiation. The aim of this study was to investigate the role of Cyr61 in RA-FLS migration and invasion after IL-6 stimulation. Methods Western blotting, immunohistochemistry, reverse transcription-polymerase chain reaction, and real time-polymerase chain reaction were used to examine protein and mRNA levels of Cyr61, matrix metalloproteinases (MMPs), and other signalling proteins. Knockdown of gene expression was performed with siRNA, and RNA sequencing was performed for differential gene analysis. Migration and invasion were assessed by wound healing and Boyden chamber assays. Results Cyr61 levels were elevated in FLSs from RA patients compared to those in osteoarthritis patients. Control and IL-6-treated FLSs showed differential gene expression. IL-6 stimulated protein synthesis of Cyr61, which was attenuated by the extracellular signal-related kinase 1/2 (ERK 1/2) inhibitor, PD98059, and knockdown of early growth response 3 (EGR3), but not of JUN. IL-6-induced Cyr61 protein synthesis increased expression of MMP2. Cyr61 promoted FLS migration and invasion in an autocrine manner. Knockdown of CYR61 and a neutralising antibody attenuated Cyr61 synthesis and IL-6-induced FLS migration. Conclusions By modulating the ERK/EGR3 pathway, IL-6 stimulated Cyr61 production and in turn increased invasiveness of FLS. Our data suggest that Cyr61 might be a potential target to prevent the progression of joint damage in RA.
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Affiliation(s)
- Changmin Choi
- Department of Medicine, Jeju National University School of Medicine, Jeju, Republic of Korea
| | - Wooseong Jeong
- Department of Internal Medicine, Division of Rheumatology, Jeju National University Hospital, Aran 13gil, Jeju, 690-797, Republic of Korea
| | - Byeongzu Ghang
- Department of Internal Medicine, Division of Rheumatology, Jeju National University Hospital, Aran 13gil, Jeju, 690-797, Republic of Korea
| | - Yonggeun Park
- Department of Orthopaedic Surgery, Jeju National University Hospital, Jeju, Republic of Korea
| | - Changlim Hyun
- Department of Pathology, Jeju National University Hospital, Jeju, Republic of Korea
| | - Moonjae Cho
- Department of Biochemistry, Jeju National University School of Medicine, Aran 13gil, Jeju, 690-797, Republic of Korea.
| | - Jinseok Kim
- Department of Internal Medicine, Division of Rheumatology, Jeju National University Hospital, Aran 13gil, Jeju, 690-797, Republic of Korea.
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Hwang Y, Kim HC, Shin EJ. Enhanced neurogenesis is involved in neuroprotection provided by rottlerin against trimethyltin-induced delayed apoptotic neuronal damage. Life Sci 2020; 262:118494. [PMID: 32991881 DOI: 10.1016/j.lfs.2020.118494] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/12/2020] [Accepted: 09/20/2020] [Indexed: 12/26/2022]
Abstract
AIMS We here investigated the effect of late- and post-ictal treatment with rottlerin, a polyphenol compound isolated from Mallotus philippinensis, on delayed apoptotic neuronal death induced by trimethyltin (TMT) in mice. MAIN METHODS Male C57BL/6N mice received a single injection of TMT (2.4 mg/kg, i.p.), and mice were treated with rottlerin after a peak time (i.e., 2 d post-TMT) of convulsive behaviors and apoptotic cell death (5.0 mg/kg, i.p. at 3 and 4 d after TMT injection). Object location test and tail suspension test were performed at 5 d after TMT injection. In addition, changes in the expression of apoptotic and neurogenic markers in the dentate gyrus were examined. KEY FINDINGS Late- and post-ictal treatment with rottlerin suppressed delayed neuronal apoptosis in the dentate gyrus, and attenuated memory impairments (as evaluated by object location test) and depression-like behaviors (as evaluated by tail suspension test) at 5 days after TMT injection in mice. In addition, rottlerin enhanced the expression of Sox2 and DCX, and facilitated p-ERK expression in BrdU-incorporated cells in the dentate gyrus of TMT-treated mice. Rottlerin also increased p-Akt expression, and attenuated the increase in the ratio of pro-apoptotic factors/anti-apoptotic factors, and consequent cytosolic cytochrome c release and caspase-3 cleavage. Rottlerin-mediated action was significantly reversed by SL327, an ERK inhibitor. SIGNIFICANCE Our results suggest that late- and post-ictal treatment with rottlerin attenuates TMT-induced delayed neuronal apoptosis in the dentate gyrus of mice via promotion of neurogenesis and inhibition of an on-going apoptotic process through up-regulation of p-ERK.
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Affiliation(s)
- Yeonggwang Hwang
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chunchon 24341, Republic of Korea
| | - Hyoung-Chun Kim
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chunchon 24341, Republic of Korea.
| | - Eun-Joo Shin
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chunchon 24341, Republic of Korea.
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Zhang H, Ma SB, Gao YJ, Xing JL, Xian H, Li ZZ, Shen SN, Wu SX, Luo C, Xie RG. Spinal CCL2 Promotes Pain Sensitization by Rapid Enhancement of NMDA-Induced Currents Through the ERK-GluN2B Pathway in Mouse Lamina II Neurons. Neurosci Bull 2020; 36:1344-54. [PMID: 32809188 DOI: 10.1007/s12264-020-00557-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 05/18/2020] [Indexed: 12/30/2022] Open
Abstract
Previous studies have shown that CCL2 (C–C motif chemokine ligand 2) induces chronic pain, but the exact mechanisms are still unknown. Here, we established models to explore the potential mechanisms. Behavioral experiments revealed that an antagonist of extracellular signal-regulated kinase (ERK) inhibited not only CCL2-induced inflammatory pain, but also pain responses induced by complete Freund’s adjuvant. We posed the question of the intracellular signaling cascade involved. Subsequent experiments showed that CCL2 up-regulated the expression of phosphorylated ERK (pERK) and N-methyl D-aspartate receptor [NMDAR] subtype 2B (GluN2B); meanwhile, antagonists of CCR2 and ERK effectively reversed these phenomena. Whole-cell patch-clamp recordings revealed that CCL2 enhanced the NMDAR-induced currents via activating the pERK pathway, which was blocked by antagonists of GluN2B and ERK. In summary, we demonstrate that CCL2 directly interacts with CCR2 to enhance NMDAR-induced currents, eventually leading to inflammatory pain mainly through the CCL2–CCR2–pERK–GluN2B pathway.
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Li H, Xing X, Zhang X, Li L, Jiang Z, Wang T, Huang X, Wang X, Zhang L, Sun L. Effects of triptolide on the sphingosine kinase - Sphingosine-1-phosphate signaling pathway in colitis-associated colon cancer. Int Immunopharmacol 2020; 88:106892. [PMID: 32810834 DOI: 10.1016/j.intimp.2020.106892] [Citation(s) in RCA: 4] [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: 04/24/2020] [Revised: 08/07/2020] [Accepted: 08/10/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUNDS Triptolide (TP) exhibits effective activity against colon cancer in multiple preclinical models, but the mechanisms underlying the observed effects are not fully understood. Sphingosine-1-phosphate (S1P) is a potent bioactive sphingolipid involved in the regulation of colon cancer progression. The aim of this study was to investigate the effect of TP on the sphingosine kinase (SPHK)-S1P signaling pathway in colitis-associated colon cancer. METHODS An azoxymethane (AOM)/dextran sulfate sodium (DSS) mouse model and the THP-1 cell line were used to evaluate the therapeutic effects and mechanisms of TP in colitis-associated colon cancer (CACC). Various molecular cell biology experiments, including Western blotting, real-time PCR and immunofluorescence, were used to obtain relevant experimental data. A liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was also established to detect the levels of S1P in tissue and plasma. RESULTS In the AOM/DSS mouse model, TP treatment induced a dose-dependent decrease in tumor incidence and inhibited macrophage recruitment and M2 polarization in the tumors. TP also efficiently decreased the S1P levels and SPHK1/S1PR1/S1PR2 expression and significantly inhibited activation of the S1P-mediated phosphorylation of ERK protein in macrophages. CONCLUSIONS The results indicated that TP might influence the recruitment and polarization of tumor-associated macrophages by suppressing the SPHK-S1P signaling pathway.
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Affiliation(s)
- Han Li
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China; School of Food and Bioengineering, Shaanxi University of Science & Technology, Xi'an 710021, China
| | - Xin Xing
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Xi Zhang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Liping Li
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Zhenzhou Jiang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Nanjing 210009, China
| | - Tao Wang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Nanjing 210009, China
| | - Xin Huang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Xinzhi Wang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Nanjing 210009, China
| | - Luyong Zhang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Nanjing 210009, China; Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China.
| | - Lixin Sun
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Nanjing 210009, China; Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China.
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Elbaz EM, Amin HAA, Kamel AS, Ibrahim SM, Helmy HS. Immunomodulatory effect of diallyl sulfide on experimentally-induced benign prostate hyperplasia via the suppression of CD4+T/IL-17 and TGF-β1/ERK pathways. Inflammopharmacology 2020; 28:1407-1420. [PMID: 32785828 DOI: 10.1007/s10787-020-00743-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 06/22/2020] [Accepted: 07/30/2020] [Indexed: 12/15/2022]
Abstract
Benign prostatic hyperplasia (BPH) is a nonmalignant enlargement of the prostate common in older men. Diallyl sulfide (DAS), a major component of garlic, has been reported to possess antioxidant, anti-inflammatory, and antiproliferative effects. However, the underlying protective immunomodulatory mechanism of DAS on BPH remains vague. Herein, experimental BPH was induced in rats by daily subcutaneous injection of testosterone propionate (TP) (3 mg/kg, s.c.) for 4 weeks. In parallel, finasteride (Fin) (5 mg/kg, p.o) or DAS (50 mg/kg, p.o.) was administered orally during BPH induction. TP-induced histological alterations and the immune-inflammatory cascade. On the other hand, DAS or Fin administration alleviated all abnormalities induced testosterone. Fin and DAS administration markedly reduced prostate weight by 53% with Fin, and by 60% with DAS. Moreover, serum testosterone and DHT were reduced by 55% and 52%, respectively, with Fin and by 68% and 75%, respectively, with DAS, in concordance with decreased protein expression of androgen receptor (AR), and prostate-specific antigen (PSA). Furthermore, both regime lessen immune-inflammatory milieu, as evidenced by decrease CD4+ T-cells protein expression and associated inflammatory cytokines. Concomitantly, Fin and DAS exhibited marked mitigation in insulin-like growth factor-1 (IGF-1), transforming growth factor-beta1 (TGF-β1), and phosphorylated extracellular signal-regulated kinase (ERK1/2) signaling. Besides alleviating oxidative stress by 53% and 68% in prostatic MDA and by 27% and 7% in prostatic iNOS with Fin and DAS, respectively. In conclusion, this work highlighted a potential therapeutic approach of DAS as a dietary preventive agent against BPH via its anti-inflammatory and immunomodulatory effect along with suppression of the ERK pathway.
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Affiliation(s)
- Eman M Elbaz
- Biochemistry Department, Faculty of Pharmacy, Cairo University, Kasr El Aini St., Cairo, 11562, Egypt.
| | - Hebat Allah A Amin
- Pathology Department, Faculty of Medicine, Helwan University, Cairo, Egypt
| | - Ahmed S Kamel
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt.
| | - Sherehan M Ibrahim
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt
| | - Hebatullah S Helmy
- Biochemistry Department, Faculty of Pharmacy, Cairo University, Kasr El Aini St., Cairo, 11562, Egypt
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Kim SJ, Kim YS, Kim JH, Jang HY, Ly DD, Das R, Park KS. Activation of ERK1/2-mTORC1-NOX4 mediates TGF-β1-induced epithelial-mesenchymal transition and fibrosis in retinal pigment epithelial cells. Biochem Biophys Res Commun 2020; 529:747-752. [PMID: 32736702 DOI: 10.1016/j.bbrc.2020.06.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 06/07/2020] [Indexed: 11/19/2022]
Abstract
Transforming growth factor-β (TGF-β) plays a crucial role in the development of epithelial to mesenchymal transition (EMT) and fibrosis, particularly in an ocular disorder such as proliferative vitreoretinopathy (PVR). However, the key molecular mechanism underlying its pathogenesis remains unknown. In the present study, using cultured ARPE-19 cells, we determined that TGF-β initiates a signaling pathway through extracellular signal-regulated kinase (ERK)-mammalian target of rapamycin complex 1 (mTORC1) that stimulates trans-differentiation and fibrosis of retinal pigment epithelium. Blocking this pathway by a TGF-βRI, ERK or mTORC1 inhibitor protected cells from EMT and fibrotic protein expression. TGF-β1 treatment increased reactive oxygen species (ROS) via NOX4 upregulation, which acts downstream of ERK and mTORC1, as the ROS scavenger N-acetylcysteine and a pan-NADPH oxidase (NOX) inhibitor DPI dissipated excess ROS generation. TGF-β1-induced oxidative stress resulted in EMT and fibrotic changes, as NAC and DPI prevented α-SMA, Col4α3 expression and cell migration. All these inhibitors blocked the downstream pathway activation in addition to clearly preventing the activation of its upstream molecules, indicating the presence of a feedback loop system that may boost the upstream events. Furthermore, the FDA-approved drug trametinib (10 nM) blunted TGF-β1-induced mTORC1 activation and downstream pathogenic alterations through ERK1/2 inhibition, which opens a therapeutic avenue for the treatment of PVR in the future.
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Affiliation(s)
- Soo-Jin Kim
- Department of Physiology, Republic of Korea; Mitohormesis Research Center, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | | | - Jeong Hun Kim
- Department of Ophthalmology & Biomedical Sciences, Seoul National University College of Medicine, South Korea; Fight Against Angiogenesis-Related Blindness (FARB) Laboratory, Clinical Research Institute, Seoul National University Hospital, Seoul, South Korea
| | - Ha Young Jang
- Fight Against Angiogenesis-Related Blindness (FARB) Laboratory, Clinical Research Institute, Seoul National University Hospital, Seoul, South Korea
| | - Dat Da Ly
- Department of Physiology, Republic of Korea; Mitohormesis Research Center, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Ranjan Das
- Department of Internal Medicine, Rush University Medical Center, Chicago, IL, USA.
| | - Kyu-Sang Park
- Department of Physiology, Republic of Korea; Mitohormesis Research Center, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
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Lee TY, Cho IS, Bashyal N, Naya FJ, Tsai MJ, Yoon JS, Choi JM, Park CH, Kim SS, Suh-Kim H. ERK Regulates NeuroD1-mediated Neurite Outgrowth via Proteasomal Degradation. Exp Neurobiol 2020; 29:189-206. [PMID: 32606250 PMCID: PMC7344372 DOI: 10.5607/en20021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 06/01/2020] [Revised: 06/16/2020] [Accepted: 06/16/2020] [Indexed: 12/22/2022] Open
Abstract
Neurogenic differentiation 1 (NeuroD1) is a class B basic helix-loop-helix (bHLH) transcription factor and regulates differentiation and survival of neuronal and endocrine cells by means of several protein kinases, including extracellular signal-regulated kinase (ERK). However, the effect of phosphorylation on the functions of NeuroD1 by ERK has sparked controversy based on context-dependent differences across diverse species and cell types. Here, we evidenced that ERK-dependent phosphorylation controlled the stability of NeuroD1 and consequently, regulated proneural activity in neuronal cells. A null mutation at the ERK-dependent phosphorylation site, S274A, increased the half-life of NeuroD1 by blocking its ubiquitin-dependent proteasomal degradation. The S274A mutation did not interfere with either the nuclear translocation of NeuroD1 or its heterodimerization with E47, its ubiquitous partner and class A bHLH transcription factor. However, the S274A mutant increased transactivation of the E-box-mediated gene and neurite outgrowth in F11 neuroblastoma cells, compared to the wild-type NeuroD1. Transcriptome and Gene Ontology enrichment analyses indicated that genes involved in axonogenesis and dendrite development were downregulated in NeuroD1 knockout (KO) mice. Overexpression of the S274A mutant salvaged neurite outgrowth in NeuroD1-deficient mice, whereas neurite outgrowth was minimal with S274D, a phosphomimicking mutant. Our data indicated that a longer protein half-life enhanced the overall activity of NeuroD1 in stimulating downstream genes and neuronal differentiation. We propose that blocking ubiquitin-dependent proteasomal degradation may serve as a strategy to promote neuronal activity by stimulating the expression of neuron-specific genes in differentiating neurons.
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Affiliation(s)
- Tae-Young Lee
- Department of Anatomy, Ajou University School of Medicine, Suwon 16499, Korea.,Department of Biomedical Sciences, Graduate School, Ajou University School of Medicine, Suwon 16499, Korea.,Research Center, CelleBrain Ltd., Jeonju 54871, Korea
| | - In-Su Cho
- Department of Anatomy, Ajou University School of Medicine, Suwon 16499, Korea
| | - Narayan Bashyal
- Department of Anatomy, Ajou University School of Medicine, Suwon 16499, Korea.,Department of Biomedical Sciences, Graduate School, Ajou University School of Medicine, Suwon 16499, Korea
| | - Francisco J Naya
- Department of Biology, Life Science and Engineering Building, Boston University, Boston, MA 00215, USA
| | - Ming-Jer Tsai
- Department of Medicine and Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jeong Seon Yoon
- Department of Anatomy, Ajou University School of Medicine, Suwon 16499, Korea
| | - Jung-Mi Choi
- Department of Anatomy, Ajou University School of Medicine, Suwon 16499, Korea
| | - Chang-Hwan Park
- Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul 04763, Korea
| | - Sung-Soo Kim
- Department of Anatomy, Ajou University School of Medicine, Suwon 16499, Korea.,Department of Biomedical Sciences, Graduate School, Ajou University School of Medicine, Suwon 16499, Korea
| | - Haeyoung Suh-Kim
- Department of Anatomy, Ajou University School of Medicine, Suwon 16499, Korea.,Department of Biomedical Sciences, Graduate School, Ajou University School of Medicine, Suwon 16499, Korea.,Research Center, CelleBrain Ltd., Jeonju 54871, Korea
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Nishioku T, Kawamoto M, Okizono R, Sakai E, Okamoto K, Tsukuba T. Dimethyl fumarate prevents osteoclastogenesis by decreasing NFATc1 expression, inhibiting of erk and p38 MAPK phosphorylation, and suppressing of HMGB1 release. Biochem Biophys Res Commun 2020; 530:455-61. [PMID: 32553625 DOI: 10.1016/j.bbrc.2020.05.088] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 05/13/2020] [Indexed: 12/13/2022]
Abstract
Osteoclasts are multinucleated bone-resorbing cells derived from monocyte/macrophage progenitor cells. Excessive formation and resorbing activities of osteoclasts are involved in the bone-destructive pathologies of rheumatoid arthritis and osteoporosis. Recently, it has been found that nuclear factor erythroid 2-related factor 2 (Nrf2), a transcription factor for anti-oxidative stress genes, functions in osteoclastogenesis. Dimethyl fumarate (DMF) is a potent activator of Nrf2 and has been shown to inhibit osteoclastogenesis. Here, we investigated the mechanisms of this inhibition by examining the activation of several signalling pathways during the differentiation of bone marrow-derived macrophages into osteoclasts. DMF inhibited the differentiation of osteoclasts in a dose-dependent manner and suppressed the bone-resorbing activity of osteoclasts. DMF treatment decreased the expression of nuclear factor of activated T-cells cytoplasmic-1, and significantly decreased phosphorylation of extracellular signal-regulated kinase and p38 mitogen-activated protein kinase in osteoclasts. We also found that DMF inhibited the extracellular release of high mobility group box 1, associated with an up-regulation of heme oxygenase-1, likely mediated through Nrf2 activation. Our results indicate that DMF inhibits osteoclast differentiation through multiple pathways.
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Kim Y, Ghil S. Regulators of G-protein signaling, RGS2 and RGS4, inhibit protease-activated receptor 4-mediated signaling by forming a complex with the receptor and Gα in live cells. Cell Commun Signal 2020; 18:86. [PMID: 32517689 PMCID: PMC7285472 DOI: 10.1186/s12964-020-00552-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 12/03/2019] [Accepted: 03/11/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Protease-activated receptor 4 (PAR4) is a seven transmembrane G-protein coupled receptor (GPCR) activated by endogenous proteases, such as thrombin. PAR4 is involved in various pathophysiologies including cancer, inflammation, pain, and thrombosis. Although regulators of G-protein signaling (RGS) are known to modulate GPCR/Gα-mediated pathways, their specific effects on PAR4 are not fully understood at present. We previously reported that RGS proteins attenuate PAR1- and PAR2-mediated signaling through interactions with these receptors in conjunction with distinct Gα subunits. METHODS We employed a bioluminescence resonance energy transfer technique and confocal microscopy to examine potential interactions among PAR4, RGS, and Gα subunits. The inhibitory effects of RGS proteins on PAR4-mediated downstream signaling and cancer progression were additionally investigated by using several assays including ERK phosphorylation, calcium mobilization, RhoA activity, cancer cell proliferation, and related gene expression. RESULTS In live cells, RGS2 interacts with PAR4 in the presence of Gαq while RGS4 binding to PAR4 occurs in the presence of Gαq and Gα12/13. Co-expression of PAR4 and Gαq induced a shift in the subcellular localization of RGS2 and RGS4 from the cytoplasm to plasma membrane. Combined PAR4 and Gα12/13 expression additionally promoted translocation of RGS4 from the cytoplasm to the membrane. Both RGS2 and RGS4 abolished PAR4-activated ERK phosphorylation, calcium mobilization and RhoA activity, as well as PAR4-mediated colon cancer cell proliferation and related gene expression. CONCLUSIONS RGS2 and RGS4 forms ternary complex with PAR4 in Gα-dependent manner and inhibits its downstream signaling. Our findings support a novel physiological function of RGS2 and RGS4 as inhibitors of PAR4-mediated signaling through selective PAR4/RGS/Gα coupling. Video Abstract.
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Affiliation(s)
- Yukeyoung Kim
- Department of Life Science, Kyonggi University, Suwon, 16227, South Korea
| | - Sungho Ghil
- Department of Life Science, Kyonggi University, Suwon, 16227, South Korea.
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Nakajima S, Kunugi H. Lauric acid promotes neuronal maturation mediated by astrocytes in primary cortical cultures. Heliyon 2020; 6:e03892. [PMID: 32420479 PMCID: PMC7218271 DOI: 10.1016/j.heliyon.2020.e03892] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 10/24/2019] [Revised: 12/17/2019] [Accepted: 04/28/2020] [Indexed: 01/15/2023] Open
Abstract
Previous studies have suggested the potential efficacy of middle chain fatty acids (MCFAs) in the treatment of mood disorders and cognitive dysfunction. MCFAs are metabolized to ketone bodies in astrocytes; however, their effects on neuronal development including neurotrophic factor level are not well-understood. In the present study, we examined the effect of MCFAs on the mRNA expression of growth factors and cytokines in primary cultures of cortical astrocytes. The effect of MCFAs on neuron-astrocyte interaction in neuronal maturation was also determined using co-culture and astrocyte-conditioned medium. Lauric acid (LA) typically increased the mRNA expression of glial-derived neurotrophic factor (Gdnf), interleukin-6 (Il6), and C–C motif chemokine 2 (Ccl2) in astrocytes. LA-induced phosphorylation of extracellular signal-regulated kinase contributed to these changes. In primary cultures of cortical neurons containing astrocytes, LA enhanced the presynaptic protein levels. Astrocyte-conditioned medium after LA treatment also enhanced the presynaptic protein levels in the cortical neuron cultures. These results suggest that LA increase the mRNA expression of GDNF and cytokines in astrocytes, and thereby, enhances the presynaptic maturation.
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Affiliation(s)
- Shingo Nakajima
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Tokyo, Japan
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Tokyo, Japan
- Department of Psychiatry, Teikyo University School of Medicine, Tokyo, Japan
- Corresponding author.
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Chen QY, Zhang ZL, Liu Q, Chen CJ, Zhang XK, Xu PY, Zhuo M. Presynaptic long-term potentiation requires extracellular signal-regulated kinases in the anterior cingulate cortex. Mol Pain 2020; 16:1744806920917245. [PMID: 32264746 PMCID: PMC7144679 DOI: 10.1177/1744806920917245] [Citation(s) in RCA: 1] [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] [Indexed: 11/22/2022] Open
Abstract
Extracellular signal-regulated kinases are widely expressed protein kinases in neurons, which serve as important intracellular signaling molecules for central plasticity such as long-term potentiation. Recent studies demonstrate that there are two major forms of long-term potentiation in cortical areas related to pain: postsynaptic long-term potentiation and presynaptic long-term potentiation. In particular, presynaptic long-term potentiation in the anterior cingulate cortex has been shown to contribute to chronic pain-related anxiety. In this review, we briefly summarized the components and roles of extracellular signal-regulated kinases in neuronal signaling, especially in the presynaptic long-term potentiation of anterior cingulate cortex, and discuss the possible molecular mechanisms and functional implications in pain-related emotional disorders.
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Affiliation(s)
- Qi-Yu Chen
- Center for Neuron and Disease, Frontier Institutes of Science and Technology, Xi'an Jiaotong University, Xi'an, China.,Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Zhi-Ling Zhang
- Department of Neurology, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Qin Liu
- Department of Neurology, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Chao-Jun Chen
- Department of Neurology, Guangzhou Chinese Medical Integrated Hospital (Huadu), Guangdong, China
| | - Xiao-Kang Zhang
- The First Affiliated Hospital of Gan-Nan Medical University, Ganzhopu, China
| | - Ping-Yi Xu
- Department of Neurology, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Min Zhuo
- Center for Neuron and Disease, Frontier Institutes of Science and Technology, Xi'an Jiaotong University, Xi'an, China.,Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.,Department of Neurology, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
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Tian L, Xiao H, Li M, Wu X, Xie Y, Zhou J, Zhang X, Wang B. A novel Sprouty4-ERK1/2-Wnt/β-catenin regulatory loop in marrow stromal progenitor cells controls osteogenic and adipogenic differentiation. Metabolism 2020; 105:154189. [PMID: 32105664 DOI: 10.1016/j.metabol.2020.154189] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [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] [Received: 12/08/2019] [Revised: 02/16/2020] [Accepted: 02/24/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Sprouty (SPRY) proteins play critical roles in controlling cell proliferation, differentiation, and survival by inhibiting receptor tyrosine kinase (RTK)-mediated extracellular signal-regulated kinase (ERK) signaling. Recent studies have demonstrated that SPRY4 negatively regulates angiogenesis and tumor growth. However, whether SPRY4 regulates osteogenic and/or adipogenic differentiation of mesenchymal stem cells remains to be explored. RESULTS In this study, we investigated the expression pattern of Spry4 and found that its expression was regulated during the differentiation of mouse marrow stromal progenitor cells and increased in the metaphysis of ovariectomized mice. In vitro loss-of-function and gain-of-function studies demonstrated that SPRY4 inhibited osteogenic differentiation and stimulated adipogenic differentiation of progenitor cells. In vivo experiments showed that silencing of Spry4 in the marrow of C57BL/6 mice blocked fat accumulation and promoted osteoblast differentiation in ovariectomized mice. Mechanistic investigations revealed the inhibitory effect of SPRY4 on canonical wingless-type MMTV integration site (Wnt) signaling and ERK pathway. ERK1/2 was shown to interact with low-density lipoprotein receptor-related protein 6 (LRP6) and activate the canonical Wnt signaling pathway. Inactivation of Wnt signaling attenuated the inhibition of adipogenic differentiation and stimulation of osteogenic differentiation by Spry4 small interfering RNA (siRNA). Finally, promoter study revealed that β-catenin transcriptionally inhibited the expression of Spry4. CONCLUSIONS Our study for the first time suggests that a novel SPRY4-ERK1/2-Wnt/β-catenin regulatory loop exists in marrow stromal progenitor cells and plays a key role in cell fate determination. It also highlights the potential of SPRY4 as a novel therapeutic target for the treatment of metabolic bone disorders such as osteoporosis.
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Affiliation(s)
- Lijie Tian
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China
| | - Hongyan Xiao
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China
| | - Mengyue Li
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China
| | - Xiaowen Wu
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China
| | - Yan Xie
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China
| | - Jie Zhou
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China
| | - Xin Zhang
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China
| | - Baoli Wang
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China.
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