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Menon RT, Thapa S, Shrestha AK, Barrios R, Shivanna B. Extracellular Signal-Regulated Kinase 1 Alone Is Dispensable for Hyperoxia-Mediated Alveolar and Pulmonary Vascular Simplification in Neonatal Mice. Antioxidants (Basel) 2022; 11:1130. [PMID: 35740027 DOI: 10.3390/antiox11061130] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 05/05/2022] [Revised: 06/01/2022] [Accepted: 06/03/2022] [Indexed: 02/04/2023] Open
Abstract
Bronchopulmonary dysplasia (BPD) is a morbid lung disease distinguished by lung alveolar and vascular simplification. Hyperoxia, an important BPD causative factor, increases extracellular signal-regulated kinases (ERK)-1/2 expression, whereas decreased lung endothelial cell ERK2 expression reduces angiogenesis and potentiates hyperoxia-mediated BPD in mice. However, ERK1′s role in experimental BPD is unclear. Thus, we hypothesized that hyperoxia-induced experimental BPD would be more severe in global ERK1-knockout (ERK1-/-) mice than their wild-type (ERK1+/+ mice) littermates. We determined the extent of lung development, ERK1/2 expression, inflammation, and oxidative stress in ERK1-/- and ERK1+/+ mice exposed to normoxia (FiO2 21%) or hyperoxia (FiO2 70%). We also quantified the extent of angiogenesis and hydrogen peroxide (H2O2) production in hyperoxia-exposed neonatal human pulmonary microvascular endothelial cells (HPMECs) with normal and decreased ERK1 signaling. Compared with ERK1+/+ mice, ERK1-/- mice displayed increased pulmonary ERK2 activation upon hyperoxia exposure. However, the extent of hyperoxia-induced inflammation, oxidative stress, and interrupted lung development was similar in ERK1-/- and ERK1+/+ mice. ERK1 knockdown in HPMECs increased ERK2 activation at baseline, but did not affect in vitro angiogenesis and hyperoxia-induced H2O2 production. Thus, we conclude ERK1 is dispensable for hyperoxia-induced experimental BPD due to compensatory ERK2 activation.
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Tanuma SI, Oyama T, Okazawa M, Yamazaki H, Takao K, Sugita Y, Amano S, Abe T, Sakagami H. A Dual Anti-Inflammatory and Anti-Proliferative 3-Styrylchromone Derivative Synergistically Enhances the Anti-Cancer Effects of DNA-Damaging Agents on Colon Cancer Cells by Targeting HMGB1-RAGE-ERK1/2 Signaling. Int J Mol Sci 2022; 23:ijms23073426. [PMID: 35408786 PMCID: PMC8998738 DOI: 10.3390/ijms23073426] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/18/2022] [Accepted: 03/18/2022] [Indexed: 01/27/2023] Open
Abstract
The current anti-cancer treatments are not enough to eradicate tumors, and therefore, new modalities and strategies are still needed. Most tumors generate an inflammatory tumor microenvironment (TME) and maintain the niche for their development. Because of the critical role of inflammation via high-mobility group box 1 (HMGB1)–receptor for advanced glycation end-products (RAGE) signaling pathway in the TME, a novel compound possessing both anti-cancer and anti-inflammatory activities by suppressing the HMGB1-RAGE axis provides an effective strategy for cancer treatment. A recent work of our group found that some anti-cancer 3-styrylchromones have weak anti-inflammatory activities via the suppression of this axis. In this direction, we searched such anti-cancer molecules possessing potent anti-inflammatory activities and discovered 7-methoxy-3-hydroxy-styrylchromone (C6) having dual suppressive activities. Mechanism-of-action studies revealed that C6 inhibited the increased phosphorylation of extracellular signal-regulated kinases 1 and 2 (ERK1/2) under the stimulation of HMGB1-RAGE signaling and thereby suppressed cytokine production in macrophage-like RAW264.7 cells. On the other hand, in colorectal cancer HCT116 cells, C6 inhibited the activation of ERK1/2, cyclin-dependent kinase 1, and AKT, down-regulated the protein level of XIAP, and up-regulated pro-apoptotic Bax and caspase-3/7 expression. These alterations are suggested to be involved in the C6-induced suppression of cell cycle/proliferation and initiation of apoptosis in the cancer cells. More importantly, in cancer cells, the treatment of C6 potentiates the anti-cancer effects of DNA-damaging agents. Thus, C6 may be a promising lead for the generation of a novel class of cancer therapeutics.
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Affiliation(s)
- Sei-ichi Tanuma
- Department of Genomic Medicinal Science, Research Institute for Science and Technology, Organization for Research Advancement, Tokyo University of Science, Noda 278-8510, Chiba, Japan; (T.O.); (M.O.); (H.Y.)
- Research Institute of Odontology (M-RIO), School of Dentistry, Meikai University, Sakado 350-0283, Saitama, Japan; (S.A.); (H.S.)
- Correspondence:
| | - Takahiro Oyama
- Department of Genomic Medicinal Science, Research Institute for Science and Technology, Organization for Research Advancement, Tokyo University of Science, Noda 278-8510, Chiba, Japan; (T.O.); (M.O.); (H.Y.)
- Hinoki Shinyaku Co., Ltd., Chiyoda-ku 102-0084, Tokyo, Japan;
| | - Miwa Okazawa
- Department of Genomic Medicinal Science, Research Institute for Science and Technology, Organization for Research Advancement, Tokyo University of Science, Noda 278-8510, Chiba, Japan; (T.O.); (M.O.); (H.Y.)
| | - Hiroaki Yamazaki
- Department of Genomic Medicinal Science, Research Institute for Science and Technology, Organization for Research Advancement, Tokyo University of Science, Noda 278-8510, Chiba, Japan; (T.O.); (M.O.); (H.Y.)
| | - Koichi Takao
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Sakado 350-0295, Saitama, Japan; (K.T.); (Y.S.)
| | - Yoshiaki Sugita
- Department of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Sakado 350-0295, Saitama, Japan; (K.T.); (Y.S.)
| | - Shigeru Amano
- Research Institute of Odontology (M-RIO), School of Dentistry, Meikai University, Sakado 350-0283, Saitama, Japan; (S.A.); (H.S.)
| | - Takehiko Abe
- Hinoki Shinyaku Co., Ltd., Chiyoda-ku 102-0084, Tokyo, Japan;
| | - Hiroshi Sakagami
- Research Institute of Odontology (M-RIO), School of Dentistry, Meikai University, Sakado 350-0283, Saitama, Japan; (S.A.); (H.S.)
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Chen M, Dai LH, Fei A, Pan SM, Wang HR. Isoquercetin activates the ERK1/2-Nrf2 pathway and protects against cerebral ischemia-reperfusion injury in vivo and in vitro. Exp Ther Med 2017; 13:1353-1359. [PMID: 28413477 PMCID: PMC5377244 DOI: 10.3892/etm.2017.4093] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [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: 06/18/2015] [Accepted: 06/08/2016] [Indexed: 12/16/2022] Open
Abstract
Isoquercetin has exhibited a wide range of therapeutic properties, including antioxidant, anti-inflammatory and anti-allergic activities. The aim of the present study was to investigate the effect of isoquercetin on rats with 2 h middle cerebral artery occlusion (MCAO) and evaluate the neuroprotective effect of isoquercetin on a primary culture of rat hippocampal neuronal cells subjected to oxygen-glucose deprivation followed by reoxygenation (OGD/R). In vivo, the rats treated with isoquercetin exhibited a lower degree of neurological dysfunction and smaller infarct volume than the vehicle-treated rats. In vitro, it was found that isoquercetin prevented the OGD/R-induced increase in apoptosis, lactate dehydrogenase release and reduction in cell viability. Additionally, isoquercetin induced the upregulation of nuclear factor erythroid 2-related factor 2 gene and protein expression, and increased extracellular signal-regulated kinase 1 and 2 (ERK1/2) phosphorylation. This indicates that the ERK1/2 pathway may contribute to the neuroprotective effect of isoquercetin against OGD/R-induced oxidative damage in rat hippocampal neurons. These findings suggest the potential importance of isoquercetin in the treatment of ischemia/reperfusion-related brain injury and associated diseases.
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Affiliation(s)
- Miao Chen
- Department of Emergency, Xinhua Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200092, P.R. China
| | - Li-Hua Dai
- Department of Emergency, Xinhua Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200092, P.R. China
| | - Aihua Fei
- Department of Emergency, Xinhua Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200092, P.R. China
| | - Shu-Ming Pan
- Department of Emergency, Xinhua Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200092, P.R. China
| | - Hai-Rong Wang
- Department of Emergency, Xinhua Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200092, P.R. China
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Yu Y, Wei SG, Zhang ZH, Weiss RM, Felder RB. ERK1/2 MAPK signaling in hypothalamic paraventricular nucleus contributes to sympathetic excitation in rats with heart failure after myocardial infarction. Am J Physiol Heart Circ Physiol 2016; 310:H732-9. [PMID: 26801309 DOI: 10.1152/ajpheart.00703.2015] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [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: 09/04/2015] [Accepted: 01/11/2016] [Indexed: 02/03/2023]
Abstract
Brain MAPK signaling pathways are activated in heart failure (HF) induced by myocardial infarction and contribute to augmented sympathetic nerve activity. We tested whether decreasing ERK1/2 (also known as p44/42 MAPK) signaling in the hypothalamic paraventricular nucleus (PVN), a forebrain source of presympathetic neurons, would reduce the upregulation of sympathoexcitatory mediators in the PVN and augmented sympathetic nerve activity in rats with HF. Sprague-Dawley rats underwent left anterior descending coronary artery ligation to induce HF, with left ventricular dysfunction confirmed by echocardiography. One week after coronary artery ligation or sham operation, small interfering (si)RNAs targeting ERK1/2 or a nontargeting control siRNA was microinjected bilaterally into the PVN. Experiments were conducted 5-7 days later. Confocal images revealed reduced phosphorylated ERK1/2 immunofluorescence in the PVN of HF rats treated with ERK1/2 siRNAs compared with HF rats treated with control siRNA. Western blot analysis confirmed significant reductions in both total and phosphorylated ERK1/2 in the PVN of HF rats treated with ERK1/2 siRNAs along with reduced expression of renin-angiotensin system components and inflammatory mediators. HF rats treated with ERK1/2 siRNAs also had reduced PVN neuronal excitation (fewer Fos-related antigen-like-immunoreactive neurons), lower plasma norepinephrine levels, and improved peripheral manifestations of HF compared with HF rats treated with control siRNAs. These results demonstrate that ERK1/2 signaling in the PVN plays a pivotal role in mediating sympathetic drive in HF induced by myocardial infarction and may be a novel target for therapeutic intervention.
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Affiliation(s)
- Yang Yu
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Shun-Guang Wei
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Zhi-Hua Zhang
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Robert M Weiss
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Robert B Felder
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa
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Gu D, Wang Z, Dou X, Zhang X, Li S, Vu L, Yao T, Song Z. Inhibition of ERK1/2 pathway suppresses adiponectin secretion via accelerating protein degradation by Ubiquitin-proteasome system: relevance to obesity-related adiponectin decline. Metabolism 2013; 62:1137-48. [PMID: 23490586 PMCID: PMC3718849 DOI: 10.1016/j.metabol.2013.01.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 01/03/2013] [Accepted: 01/08/2013] [Indexed: 10/27/2022]
Abstract
OBJECTIVE Predominantly secreted by adipose tissue, adiponectin possesses insulin-sensitizing, anti-atherogenic, anti-inflammatory, and anti-angiogenic properties. Paradoxically, obesity is associated with declined plasma adiponectin levels; however, the underlying mechanisms remain elusive. In this study, we investigated the mechanistic involvement of MEK/ERK1/2 pathway in obesity-related adiponectin decrease. MATERIALS/METHODS C57 BL/6 mice exposed to a high-fat diet (HFD) were employed as animal obesity model. Both fully-differentiated 3T3-L1 and mouse primary adipocytes were used in the in vitro experiments. RESULTS Obesity and plasma adiponectin decline induced by prolonged HFD exposure were associated with suppressed ERK1/2 activation in adipose tissue. In adipocytes, specific inhibition of MEK/ERK1/2 pathway decreased intracellular and secretory adiponectin levels, whereas adiponectin gene expression was increased, suggesting that MEK/ERK1/2 inhibition may promote adiponectin protein degradation. Cycloheximide (CHX)-chase assay revealed that MEK/ERK1/2 inhibition accelerated adiponectin protein degradation, which was prevented by MG132, a potent proteasome inhibitor. Immunoprecipitation assay showed that intracellular MEK/ERK1/2 activity was negatively associated with ubiquitinated adiponectin protein levels. Consistently, long-term HFD feeing in mice increased ubiquitinated adiponectin levels in the epididymal fat pads. CONCLUSIONS Adipose tissue MEK/ERK1/2 activity can differentially regulate adiponectin gene expression and protein abundance and its suppression in obesity may play a mechanistic role in obesity-related plasma adiponectin decline.
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Affiliation(s)
- Dongfang Gu
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
- Key Laboratory of Cardiovascular Medicine Research (Harbin Medical University), Ministry of Education, P. R. China
| | - Zhigang Wang
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
| | - Xiaobing Dou
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, P. R. China. 310053
| | - Ximei Zhang
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
| | - Songtao Li
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
| | - Lyndsey Vu
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
| | - Tong Yao
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
| | - Zhenyuan Song
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612
- Department of Pathology, Medical Center, University of Illinois, Chicago, IL 60612
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Catalioto RM, Valenti C, Liverani L, Giuliani S, Maggi CA. Characterization of a novel proinflammatory effect mediated by BK and the kinin B₂ receptor in human preadipocytes. Biochem Pharmacol 2013; 86:508-20. [PMID: 23796753 DOI: 10.1016/j.bcp.2013.06.005] [Citation(s) in RCA: 6] [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: 04/17/2013] [Revised: 06/05/2013] [Accepted: 06/06/2013] [Indexed: 12/16/2022]
Abstract
Obesity and adipose tissue contribute to local and systemic inflammation. However the role of the inflammatory mediator bradykinin (BK) in this context is not known. We therefore evaluated the effect of BK on adipokines secretion in human preadipocytes during the course of differentiation and characterized the receptors involved. Results obtained from antibody array and ELISA experiments showed that several adipokines are released by human preadipocytes under basal conditions while BK specifically stimulated the production of interleukin(IL)-6 and IL-8. The effect of BK diminished with the progression of differentiation, being almost inactive on adipocytes. In preadipocytes, BK also induced a rapid and transient [Ca²⁺](i) mobilization, a rapid and sustained increase in ERK1/2 activation and enhanced forskolin-stimulated cAMP accumulation. BK was without effect on cell proliferation and viability as assessed by bromodeoxyuridine incorporation, WST-1 conversion, or lactate dehydrogenase leakage and was without effect on adipogenesis as measured by triglyceride accumulation, GPDH activity and leptin release. The B₁ receptor agonist, Lys-[des-Arg⁹]-BK, displayed poor activity or was without effect while overall BK effects were prevented by the selective B₂ receptor antagonist, fasitibant chloride, but not by the B₁ selective antagonist, Lys-[Leu⁸][des-Arg⁹]-BK. Immunoblot analysis and immunofluorescence studies showed that the kinin B₂ receptor was essentially expressed at the beginning of the differentiation program. In conclusion, human preadipocytes expressed kinin B₂ receptors linked to multiple signaling pathways, IL-6 and IL-8 production, and BK proinflammatory response in adipose tissue could be prevented by fasitibant chloride.
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Affiliation(s)
- Rose-Marie Catalioto
- Pharmacology Department, Menarini Ricerche SpA, Via Rismondo 12A, 50131 Florence, Italy.
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Tanaka Y, Fukumitsu H, Soumiya H, Yoshimura S, Iwama T, Furukawa S. 2-decenoic acid ethyl ester, a compound that elicits neurotrophin-like intracellular signals, facilitating functional recovery from cerebral infarction in mice. Int J Mol Sci 2012; 13:4968-4981. [PMID: 22606023 PMCID: PMC3344259 DOI: 10.3390/ijms13044968] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 04/06/2012] [Accepted: 04/11/2012] [Indexed: 02/07/2023] Open
Abstract
In our previous study, we found that trans-2-decenoic acid ethyl ester (DAEE), a derivative of a medium-chain fatty acid, elicits neurotrophin-like signals including the activation of extracellular signal-regulated kinases 1 and 2 (ERK1/2) in cultured mouse cortical neurons. Here, we examined the efficacy of intraperitoneal administration of DAEE on the treatment of a mouse model of the cerebral infarction caused by unilateral permanent middle cerebral artery occlusion (PMCAO). DAEE-treatment (100 μg/kg body weight injected at 0.5, 24, 48, 72 h after PMCAO) significantly restored the mice from PMCAO-induced neurological deficits including motor paralysis when evaluated 48, 72, and 96 h after the PMCAO. Furthermore, DAEE facilitated the phosphorylation of ERK1/2 on the infarction side of the brain when analyzed by Western immunoblot analysis, and it enhanced the number of phosphorylated ERK1/2-positive cells in the border areas between the infarction and non-infarction regions of the cerebral cortex, as estimated immunohistochemically. As the infarct volume remained unchanged after DAEE-treatment, it is more likely that DAEE improved the neurological condition through enhanced neuronal functions of the remaining neurons in the damaged areas rather than by maintaining neuronal survival. These results suggest that DAEE has a neuro-protective effect on cerebral infarction.
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Affiliation(s)
- Yoshitaka Tanaka
- Laboratory of Molecular Biology, Gifu Pharmaceutical University, Daigaku-nishi, 1-25-4, Gifu 501-1190, Japan; E-Mails: (Y.T.); (H.F.): (H.S.)
- Department of Neurosurgery, Gifu University Graduate School of Medicine, Yanagido 1-1, Gifu 501-1194, Japan; E-Mails: (S.Y.); (T.I.)
| | - Hidefumi Fukumitsu
- Laboratory of Molecular Biology, Gifu Pharmaceutical University, Daigaku-nishi, 1-25-4, Gifu 501-1190, Japan; E-Mails: (Y.T.); (H.F.): (H.S.)
| | - Hitomi Soumiya
- Laboratory of Molecular Biology, Gifu Pharmaceutical University, Daigaku-nishi, 1-25-4, Gifu 501-1190, Japan; E-Mails: (Y.T.); (H.F.): (H.S.)
| | - Shinichi Yoshimura
- Department of Neurosurgery, Gifu University Graduate School of Medicine, Yanagido 1-1, Gifu 501-1194, Japan; E-Mails: (S.Y.); (T.I.)
| | - Toru Iwama
- Department of Neurosurgery, Gifu University Graduate School of Medicine, Yanagido 1-1, Gifu 501-1194, Japan; E-Mails: (S.Y.); (T.I.)
| | - Shoei Furukawa
- Laboratory of Molecular Biology, Gifu Pharmaceutical University, Daigaku-nishi, 1-25-4, Gifu 501-1190, Japan; E-Mails: (Y.T.); (H.F.): (H.S.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +81-58-230-8100; Fax: +81-58-230-8105
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