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Wendimu MY, Alqinyah M, Vella S, Dean P, Almutairi F, Davila-Rivera R, Rayatpisheh S, Wohlschlegel J, Moreno S, Hooks SB. RGS10 physically and functionally interacts with STIM2 and requires store-operated calcium entry to regulate pro-inflammatory gene expression in microglia. Cell Signal 2021; 83:109974. [PMID: 33705894 DOI: 10.1016/j.cellsig.2021.109974] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 02/19/2021] [Accepted: 03/04/2021] [Indexed: 01/14/2023]
Abstract
Chronic activation of microglia is a driving factor in the progression of neuroinflammatory diseases, and mechanisms that regulate microglial inflammatory signaling are potential targets for novel therapeutics. Regulator of G protein Signaling 10 is the most abundant RGS protein in microglia, where it suppresses inflammatory gene expression and reduces microglia-mediated neurotoxicity. In particular, microglial RGS10 downregulates the expression of pro-inflammatory mediators including cyclooxygenase 2 (COX-2) following stimulation with lipopolysaccharide (LPS). However, the mechanism by which RGS10 affects inflammatory signaling is unknown and is independent of its canonical G protein targeted mechanism. Here, we sought to identify non-canonical RGS10 interacting partners that mediate its anti-inflammatory mechanism. Through RGS10 co-immunoprecipitation coupled with mass spectrometry, we identified STIM2, an endoplasmic reticulum (ER) localized calcium sensor and a component of the store-operated calcium entry (SOCE) machinery, as a novel RGS10 interacting protein in microglia. Direct immunoprecipitation experiments confirmed RGS10-STIM2 interaction in multiple microglia and macrophage cell lines, as well as in primary cells, with no interaction observed with the homologue STIM1. We further determined that STIM2, Orai channels, and the calcium-dependent phosphatase calcineurin are essential for LPS-induced COX-2 production in microglia, and this pathway is required for the inhibitory effect of RGS10 on COX-2. Additionally, our data demonstrated that RGS10 suppresses SOCE triggered by ER calcium depletion and that ER calcium depletion, which induces SOCE, amplifies pro-inflammatory genes. In addition to COX-2, we also show that RGS10 suppresses the expression of pro-inflammatory cytokines in microglia in response to thrombin and LPS stimulation, and all of these effects require SOCE. Collectively, the physical and functional links between RGS10 and STIM2 suggest a complex regulatory network connecting RGS10, SOCE, and pro-inflammatory gene expression in microglia, with broad implications in the pathogenesis and treatment of chronic neuroinflammation.
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Affiliation(s)
- Menbere Y Wendimu
- From the Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA 30602, United States of America
| | - Mohammed Alqinyah
- From the Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA 30602, United States of America
| | - Stephen Vella
- Department of Cellular Biology, University of Georgia, Athens, GA 30602, United States of America
| | - Phillip Dean
- From the Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA 30602, United States of America
| | - Faris Almutairi
- From the Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA 30602, United States of America
| | - Roseanne Davila-Rivera
- From the Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA 30602, United States of America
| | - Shima Rayatpisheh
- Department of Biological Chemistry, University of California, Los Angeles 90095, United States of America
| | - James Wohlschlegel
- Department of Biological Chemistry, University of California, Los Angeles 90095, United States of America
| | - Silvia Moreno
- Department of Cellular Biology, University of Georgia, Athens, GA 30602, United States of America
| | - Shelley B Hooks
- From the Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA 30602, United States of America.
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Wang Q, Ye C, Sun S, Li R, Shi X, Wang S, Zeng X, Kuang N, Liu Y, Shi Q, Liu R. Curcumin attenuates collagen-induced rat arthritis via anti-inflammatory and apoptotic effects. Int Immunopharmacol 2019; 72:292-300. [PMID: 31005039 DOI: 10.1016/j.intimp.2019.04.027] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [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: 05/20/2018] [Revised: 04/02/2019] [Accepted: 04/12/2019] [Indexed: 10/27/2022]
Abstract
Curcumin is a natural herbal product that has been popularly used to treat autoimmune diseases in China; however, its effects on rheumatoid arthritis and its mechanism are not clear. The main purposes of this study are to explore the therapeutic effects of curcumin on collagen-induced arthritis (CIA) rats and the pharmacological mechanism. In the present study, CIA rats were established by injecting bovine type II collagen. Curcumin and methotrexate were then orally administered daily, and the swelling degree of the hind limb joints was scored every two days. Histopathological changes were observed by hematoxylin-eosin staining. The levels of cytokines (TNF-α, IL-1β, IL-17 and TGF-β) were detected by radioimmunoassay, while the expression of IκBα and COX-2 was detected by Western blot. In addition, cell viability was detected by CCK-8 assay, and the effect of curcumin on macrophage apoptosis was detected by flow cytometry and TUNEL assay. The results indicated that in vivo curcumin attenuated the degree of joint swelling of rats and the further development of joint histopathology. Moreover, it downregulated the levels of cytokines. In vitro curcumin inhibited the degradation of IκBα and reduced the production of COX-2 in LPS-induced inflammatory RAW264.7 cells. Importantly, curcumin significantly induced macrophage apoptosis. In conclusion, in this study, we have demonstrated that curcumin exerts therapeutic effects on arthritis in CIA rats and has a strong pharmacological activity on reducing the inflammatory response in macrophages. Its mechanism may be related to the inhibition of the NF-κB signaling pathway and the promotion of macrophage apoptosis.
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Affiliation(s)
- Qirui Wang
- Department of Immunology, Medical College of Nanchang University, Nanchang 330000, China
| | - Chanqi Ye
- Department of Immunology, Medical College of Nanchang University, Nanchang 330000, China
| | - Shukun Sun
- Department of Immunology, Medical College of Nanchang University, Nanchang 330000, China
| | - Rong Li
- Department of Immunology, Medical College of Nanchang University, Nanchang 330000, China
| | - Xiaojian Shi
- Department of Vascular Surgery, The First Hospital of Jilin University, Changchun 130000, China
| | - Shuai Wang
- Arizona Metabolomics Laboratory, College of Health Solutions, Arizona State University, Scottsdale 85259, United States of America
| | - Xiaoping Zeng
- Department of Immunology, Medical College of Nanchang University, Nanchang 330000, China
| | - Nanzhen Kuang
- Department of Immunology, Medical College of Nanchang University, Nanchang 330000, China
| | - Yulin Liu
- Department of Immunology, Medical College of Nanchang University, Nanchang 330000, China
| | - Qiaofa Shi
- Department of Immunology, Medical College of Nanchang University, Nanchang 330000, China
| | - Renping Liu
- Department of Immunology, Medical College of Nanchang University, Nanchang 330000, China.
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Chrestella J, Farhat F, Daulay ER, Asnir RA, Yudhistira A, Nasution IA. Cyclooxygenase-2 Expression and Its Correlation with Primary Tumor Size and Lymph Node Involvement in Nasopharyngeal Carcinoma. Open Access Maced J Med Sci 2018; 6:2001-2005. [PMID: 30559850 PMCID: PMC6290448 DOI: 10.3889/oamjms.2018.356] [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: 09/04/2018] [Revised: 11/04/2018] [Accepted: 11/04/2018] [Indexed: 11/26/2022] Open
Abstract
AIM: This study aimed to observe the cyclooxygenase-2 expression and its correlation with tumour size and lymph node involvement in nasopharyngeal carcinoma. METHODS: This study was cross-sectional, that enrolled 126 samples diagnosed with nasopharyngeal carcinoma in Haji Adam Malik General Hospital, Medan, Indonesia which fulfilled the inclusion criteria. RESULTS: Based on this study, we found that the age peak incidence of nasopharyngeal carcinoma patients about a 41-60-year-old group (57.1%), dominated by men (71.4%). Through histopathological examination, non-keratinizing squamous cell carcinoma is the most predominant type (79.4%). We also found T3 is the most prevalent primary tumour size (32.5%) with prominent lymph node involvement N3 (45.2%), and stage IV (54.8%). Cyclooxygenase-2 overexpression is prevalent among nonkeratinizing squamous cell carcinoma (81.1%), T3 primary tumour size (41.1%), N3 node involvement (60.0%), and IV clinical stage (71.6%). In addition, we found a significant relationship between cyclooxygenase-2 expressions towards tumor size (p < 0.001) and lymph node involvement (p < 0.001) in nasopharyngeal carcinoma. CONCLUSION: It is proved that the overexpression of cyclooxygenase-2 will increase the susceptibility of nasopharyngeal carcinoma patients having advanced primary tumour size and lymph node involvement.
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Affiliation(s)
- Jessy Chrestella
- Universitas Sumatera Utara, Fakultas Kedokteran, Pathology, Sumatera Utara, Indonesia
| | - Farhat Farhat
- Universitas Sumatera Utara Fakultas Kedokteran, Otorhinolaryngology Head and Neck Surgery Jl. Dr T. Mansyur No. 9, Medan, North Sumatera 20155, Indonesia
| | - Elvita Rahmi Daulay
- Universitas Sumatera Utara Fakultas Kedokteran, Radiology, Medan, Sumatera Utara, Indonesia
| | - Rizalina Arwinati Asnir
- Universitas Sumatera Utara Fakultas Kedokteran, Otorhinolaryngology Head and Neck Surgery Jl. Dr T. Mansyur No. 9, Medan, North Sumatera 20155, Indonesia
| | - Ashri Yudhistira
- Universitas Sumatera Utara Fakultas Kedokteran, Otorhinolaryngology Head and Neck Surgery Jl. Dr T. Mansyur No. 9, Medan, North Sumatera 20155, Indonesia
| | - Indah Afriani Nasution
- Universitas Sumatera Utara Fakultas Kedokteran, Otorhinolaryngology Head and Neck Surgery Jl. Dr T. Mansyur No. 9, Medan, North Sumatera 20155, Indonesia
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Nandi P, Girish GV, Majumder M, Xin X, Tutunea-Fatan E, Lala PK. PGE2 promotes breast cancer-associated lymphangiogenesis by activation of EP4 receptor on lymphatic endothelial cells. BMC Cancer 2017; 17:11. [PMID: 28056899 PMCID: PMC5217626 DOI: 10.1186/s12885-016-3018-2] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [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: 05/26/2016] [Accepted: 12/16/2016] [Indexed: 12/20/2022] Open
Abstract
Background Lymphatic metastasis, facilitated by lymphangiogenesis is a common occurrence in breast cancer, the molecular mechanisms remaining incompletely understood. We had earlier shown that cyclooxygenase (COX)-2 expression by human or murine breast cancer cells promoted lymphangiogenesis and lymphatic metastasis by upregulating VEGF-C/D production by tumor cells or tumor-associated macrophages primarily due to activation of the prostaglandin receptor EP4 by endogenous PGE2. It is not clear whether tumor or host-derived PGE2 has any direct effect on lymphangiogenesis, and if so, whether EP4 receptors on lymphatic endothelial cells (LEC) play any role. Methods Here, we address these questions employing in vitro studies with a COX-2-expressing and VEGF-C/D-producing murine breast cancer cell line C3L5 and a rat mesenteric (RM) LEC line and in vivo studies in nude mice. Results RMLEC responded to PGE2, an EP4 agonist PGE1OH, or C3L5 cell-conditioned media (C3L5-CM) by increased proliferation, migration and accelerated tube formation on growth factor reduced Matrigel. Native tube formation by RMLEC on Matrigel was abrogated in the presence of a selective COX-2 inhibitor or an EP4 antagonist. Addition of PGE2 or EP4 agonist, or C3L5-CM individually in the presence of COX-2 inhibitor, or EP4 antagonist, restored tube formation, reinforcing the role of EP4 on RMLEC in tubulogenesis. These results were partially duplicated with a human dermal LEC (HMVEC-dLyAd) and a COX-2 expressing human breast cancer cell line MDA-MB-231. Knocking down EP4 with shRNA in RMLEC abrogated their tube forming capacity on Matrigel in the absence or presence of PGE2, EP4 agonist, or C3L5-CM. RMLEC tubulogenesis following EP4 activation by agonist treatment was dependent on PI3K/Akt and Erk signaling pathways and VEGFR-3 stimulation. Finally in a directed in vivo lymphangiogenesis assay (DIVLA) we demonstrated the lymphangiogenic as well as angiogenic capacity of PGE2 and EP4 agonist in vivo. Discussion/conclusions These results demonstrate the roles of tumor as well as host-derived PGE2 in inducing lymphangiogenesis, at least in part, by activating EP4 and VEGFR-3 on LEC. EP4 being a common target on both tumor and host cells contributing to tumor-associated lymphangiogenesis reaffirms the therapeutic value of EP4 antagonists in the intervention of lymphatic metastasis in breast cancer.
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Affiliation(s)
- Pinki Nandi
- Department of Anatomy and Cell Biology, University of Western Ontario, London, Ontario, N6A5C1, Canada
| | - Gannareddy V Girish
- Department of Anatomy and Cell Biology, University of Western Ontario, London, Ontario, N6A5C1, Canada
| | - Mousumi Majumder
- Department of Anatomy and Cell Biology, University of Western Ontario, London, Ontario, N6A5C1, Canada.,Department of Biology, Brandon University, Brandon, Manitoba, R7A 6A9, Canada
| | - Xiping Xin
- Department of Anatomy and Cell Biology, University of Western Ontario, London, Ontario, N6A5C1, Canada
| | - Elena Tutunea-Fatan
- Department of Anatomy and Cell Biology, University of Western Ontario, London, Ontario, N6A5C1, Canada
| | - Peeyush K Lala
- Department of Anatomy and Cell Biology, University of Western Ontario, London, Ontario, N6A5C1, Canada. .,Department of Oncology, University of Western Ontario, London, Ontario, N6A5C1, Canada. .,Children's Health Research Institute, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, N6A5C1, Canada.
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Lin CC, Chan CM, Huang YP, Hsu SH, Huang CL, Tsai SJ. Methylglyoxal activates NF-κB nuclear translocation and induces COX-2 expression via a p38-dependent pathway in synovial cells. Life Sci 2016; 149:25-33. [PMID: 26898122 DOI: 10.1016/j.lfs.2016.02.060] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 02/11/2016] [Accepted: 02/15/2016] [Indexed: 02/06/2023]
Abstract
AIMS There is growing evidence of an increased prevalence of osteoarthritis (OA) among people with diabetes. Synovial inflammation and increased expression of cyclooxygenase-2 (COX-2) are two key features of patients with OA. Methylglyoxal (MGO) is a common intermediate in the formation of advanced glycation end-products, and its concentration is also typically higher in diabetes. In this study, we investigated the effects of the treatment of different MGO concentrations to rabbit HIG-82 synovial cells on COX-2 expression. MAIN METHODS The MGO induced COX-2 mRNA expression was detected by quantitative polymerase chain reaction. The MGO induced COX-2 protein production and its signaling pathways were detected by western blotting. The nuclear factor-kappa B (NF-κB) nuclear translocation by MGO was examined by immunofluorescence. KEY FINDINGS In the present study, we find that MGO has no toxic effects on rabbit synovial cells under the experimental conditions. Our analysis demonstrates that MGO induced COX-2 mRNA and protein production. Moreover, MGO induces p38-dependent COX-2 protein expression as well as the phosphorylations of extracellular signal-regulated kinase, c-Jun N-terminal kinase (JNK), and Akt/mammalian target of rapamycin (mTOR)/p70S6K; however, inhibition of JNK and Akt/mTOR/p70S6K phosphorylations further activates COX-2 protein expression. Furthermore, MGO is shown to activate of nuclear factor-kappa B (NF-κB) nuclear translocation. SIGNIFICANCE Our results suggest that MGO can induce COX-2 expression via a p38-dependent pathway and activate NF-κB nuclear translocation in synovial cells. These results provide insight into the pathogenesis of the synovial inflammation under the diabetic condition associated with higher MGO levels.
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Affiliation(s)
- Chuan-Chao Lin
- Institute of Medicine, Chung Shan Medical University, Taichung City, Taiwan; Department of Physical Medicine and Rehabilitation, Chung Shan Medical University, School of Medicine and Hospital, Taichung City, Taiwan
| | - Chi-Ming Chan
- Department of Ophthalmology, Cardinal Tien Hospital, New Taipei City, Taiwan; School of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan
| | - Yi-Pin Huang
- Medical Research Center, Cardinal Tien Hospital, New Taipei City, Taiwan
| | - Shu-Hao Hsu
- Medical Research Center, Cardinal Tien Hospital, New Taipei City, Taiwan
| | - Chuen-Lin Huang
- Medical Research Center, Cardinal Tien Hospital, New Taipei City, Taiwan; Department of Physiology and Biophysics, Graduate Institute of Physiology, National Defense Medical Center, Taipei City, Taiwan
| | - Su-Ju Tsai
- Department of Physical Medicine and Rehabilitation, Chung Shan Medical University, School of Medicine and Hospital, Taichung City, Taiwan.
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Park HR, Loch-Caruso R. Protective effect of (±)α-tocopherol on brominated diphenyl ether-47-stimulated prostaglandin pathways in human extravillous trophoblasts in vitro. Toxicol In Vitro 2015; 29:1309-18. [PMID: 26026498 DOI: 10.1016/j.tiv.2015.05.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 05/09/2015] [Accepted: 05/19/2015] [Indexed: 12/21/2022]
Abstract
Brominated diphenyl ether (BDE)-47 is a prevalent flame retardant chemical found in human tissues and is linked to adverse pregnancy outcomes in humans. Because dysregulation of the prostaglandin pathway is implicated in adverse pregnancy outcomes, the present study investigates BDE-47 induction of prostaglandin synthesis in a human extravillous trophoblast cell line, HTR-8/SVneo, examining the hypothesis that BDE-47 increases generation of reactive oxygen species (ROS) to stimulate the prostaglandin response. Treatment with 20 μM BDE-47 significantly increased mRNA expression of prostaglandin-endoperoxide synthase 2 (PTGS2) at 4, 12 and 24 h, and 24-h treatment significantly increased cyclooxygenase (COX)-2 cellular protein expression and prostaglandin E2 (PGE2) concentration in culture medium. The BDE-47-stimulated PGE2 release was inhibited by the COX inhibitors indomethacin and NS398, implicating COX activity. Exposure to 20 μM BDE-47 significantly increased ROS generation as measured by carboxydichlorofluorescein fluorescence, and this response was blocked by cotreatment with the peroxyl radical scavenger (±)-α-tocopherol. (±)-α-Tocopherol cotreatment suppressed BDE-47-stimulated increases of PGE2 release without significant effects on COX-2 mRNA and protein expression, implicating a role for ROS in post-translational regulation of COX activity. Because prostaglandins regulate trophoblast functions necessary for placentation and pregnancy, further investigation is warranted of BDE-47 impacts on trophoblast responses.
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