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Priya TS, Siva B, Vemireddy S, Babu KS. Bioactive constituents from Tinospora cordifolia (willd.): Isolation, synthesis and their immunomodulatory activity. Fitoterapia 2024; 176:105988. [PMID: 38703915 DOI: 10.1016/j.fitote.2024.105988] [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: 12/08/2023] [Revised: 05/01/2024] [Accepted: 05/01/2024] [Indexed: 05/06/2024]
Abstract
Traditional medicinal plants have been used for centuries for their immunomodulatory properties and therapeutic potentials. The present study aims to investigate the immunomodulatory constituents from traditional medicinal plant, Tinospora cordifolia (willd.). Our study resulted in the isolation of new compound, 27-hydroxy octacosyl ferulate (1) along with eleven known compounds (2-12). The structures of the isolated compounds were characterized by combination of NMR (1D and 2D) and Mass spectroscopic methods. The hemisynthesis of compound 12 (ferulic acid) yielded (12a-12d and 12e-12 m) derivatives. Further, the isolated compounds and synthesized derivatives were assessed for their immunomodulatory potentials by evaluating their cytotoxicity and pro-inflammatory effects against macrophage cells (IL-6) and DC activation markers (CD 11c and 86). The biological results indicated that crude extract displayed potent immunomodulatory activity while isolated compounds and synthetic analogues showed moderate activity. Among the tested compounds, new compound (1), quercetin (10) and derivatives 12b, 12c found to be non-cytotoxic and displayed immunomodulatory potentials. Therefore, these compounds can be studied for autoimmunity and other immune suppressing conditions.
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Affiliation(s)
- Telukuntla Sai Priya
- Department of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Bandi Siva
- Department of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Sravanthi Vemireddy
- Department of Organic synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - K Suresh Babu
- Department of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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Guangzhang C, Fangfang F, Siqian D, Xinyi X, Xiaochuan B, Yihan R, Li W. Outer membrane vesicles from Escherichia coli are efficiently internalized by macrophage cells and alter their inflammatory response. Microb Pathog 2023; 175:105965. [PMID: 36592640 DOI: 10.1016/j.micpath.2022.105965] [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: 11/15/2022] [Revised: 12/26/2022] [Accepted: 12/29/2022] [Indexed: 12/31/2022]
Abstract
The release of extracellular vesicles (EV) by pathogenic microbes is considered an alternative cell-to-cell transport of macromolecules transport mechanism. In Gram-negative bacteria, EVs may be formed by outer membrane budding, so-called outer membrane vesicles (OMVs). Previous studies have revealed E. coli constitutively release nano-sized OMVs, which can be potent activators of cellular functions without live bacteria. But the immunomodulatory activity of E. coli OMVs is still relatively poorly understood. Here we investigated the morphological characterization and composition of E.Coli OMVs, kinetics of internalization by Raw 264.7 macrophage cells, and their immunomodulatory activity on cells. By transmission electron microscopy and dynamic light scattering, E.Coli OMVs were identified as typical cup-shaped, bilayered membranous structures, mainly distributed between 72.5 and 212.5 nm. We also demonstrated by confocal fluorescence microscopy that exposure of Raw 264.7 cells to E.Coli OMVs resulted in internalization of these nanoparticles and decreased mitochondrial membrane potential. In addition, E. Coli OMVs treatment induced the production of ROS, iNOS, IL-1β, IL-6, IL-10 and up-regulation of CD86 and CD206. Taken together, our results indicated that E.Coli OMVs are immunobiologically active, can directly interact with macrophage and participate in immune responses.
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Affiliation(s)
- Chen Guangzhang
- School of Basic Medicine, Bengbu Medical College, Bengbu, 233030, China
| | - Fan Fangfang
- School of Basic Medicine, Bengbu Medical College, Bengbu, 233030, China
| | - Deng Siqian
- School of Basic Medicine, Bengbu Medical College, Bengbu, 233030, China
| | - Xia Xinyi
- School of Clinical Medicine, Bengbu Medical College, Bengbu, 233030, China
| | - Bian Xiaochuan
- School of Clinical Medicine, Bengbu Medical College, Bengbu, 233030, China
| | - Ren Yihan
- School of Clinical Medicine, Bengbu Medical College, Bengbu, 233030, China
| | - Wei Li
- School of Basic Medicine, Bengbu Medical College, Bengbu, 233030, China; Anhui Key Laboratory of Infection and Immunity at Bengbu Medical College, Bengbu, 233030, China.
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Hu Q, Zhao F, Fan M, He C, Yang X, Huang Z, Fu Z. The influence of titanium dioxide nanoparticles on their cellular response to macrophage cells. Comp Biochem Physiol C Toxicol Pharmacol 2019; 223:42-52. [PMID: 31082463 DOI: 10.1016/j.cbpc.2019.05.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 12/13/2018] [Revised: 04/27/2019] [Accepted: 05/08/2019] [Indexed: 12/13/2022]
Abstract
As the most widely application of nanomaterials in biology and medicine, their interaction with biological system and the afterwards cellular responses would be addressed. Here, the agglomerate states of two kinds of TiO2 NPs in culture medium were characterized and the cluster specific cellular responses in RAW264.7 cells were investigated. Owing to the smaller aggregates and more positively charged surface, 21 nm TiO2 NPs exhibited higher cytotoxicity, which correlated with their ability to cause damage to mitochondria. While for 35 nm TiO2 NPs, higher level of cell autophagy and stronger pro-inflammatory immune response were observed, which are responsible for their lower cytotoxicity. These results suggest that physiochemical properties of TiO2 NPs in culture medium are important factor affecting their cellular response to RAW264.7 cells.
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Affiliation(s)
- Qinglian Hu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, 310032 Hangzhou, China
| | - Fenghui Zhao
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, 310032 Hangzhou, China
| | - Mengqi Fan
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, 310032 Hangzhou, China
| | - Chao He
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, 310032 Hangzhou, China
| | - Xiaole Yang
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, 310032 Hangzhou, China
| | - Zeming Huang
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, 310032 Hangzhou, China
| | - Zhengwei Fu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, 310032 Hangzhou, China.
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Wu H, Zhang R, Fan X, Lian Z, Hu Y. FoxOs could play an important role during influenza A viruses infection via microarray analysis based on GEO database. Infect Genet Evol 2019; 75:104009. [PMID: 31437558 DOI: 10.1016/j.meegid.2019.104009] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 05/25/2019] [Accepted: 08/18/2019] [Indexed: 01/02/2023]
Abstract
Influenza is a highly contagious respiratory illness caused by influenza A viruses (IAVs). The response and reaction from the host vary due to different subtypes. In this study, we identified the global transcriptomics of HUVEC (human umbilical vein endothelial cells) and macrophage cells after infection of H5N1 and H1N1 strains using microarray data from Gene Expression Omnibus (GEO), respectively. Our data showed that influenza A viruses (IAVs) could induce more global profound transcriptomics in HUVEC than macrophage cells. H5N1 infection led to much more rigorous apoptosis than H1N1 did in macrophage cells. Our data is consistent with the idea that by maintaining normal levels of FoxO1 could be maintained, the pro-apoptotic effects of IAV virus infection could be reduced. Anti-inflammatory and anti-apoptosis responses could be manipulated via FoxOs in response to IAVs infection, indicating that FoxOs could function as candidate target for the treatment of IAVs infection. Our result thus provides new insight for the future strategy of anti-IAVs therapy.
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Affiliation(s)
- Hongping Wu
- Beijing Key Laboratory of Animal Genetic Improvement, Beijing Key Laboratory of Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, No.2 Yuanmingyuan West Rd, Haidian, Beijing 100193, PR China.
| | - Rui Zhang
- Beijing Key Laboratory of Animal Genetic Improvement, Beijing Key Laboratory of Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, No.2 Yuanmingyuan West Rd, Haidian, Beijing 100193, PR China.
| | - Xiaoxu Fan
- National Surveillance and Research Center for Exotic Animal Diseases, China Animal Health and Epidemiology Center, No. 369 Nanjing Rd, Shibei, Qingdao 266032, Shandong, PR China.
| | - Zhengxing Lian
- Beijing Key Laboratory of Animal Genetic Improvement, Beijing Key Laboratory of Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, No.2 Yuanmingyuan West Rd, Haidian, Beijing 100193, PR China.
| | - Yanxin Hu
- Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, No.2 Yuanmingyuan West Rd, Haidian, Beijing 100193, PR China.
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Zhou JY, Chen M, Wu CE, Zhuang YW, Chen YG, Liu SL. The modified Si-Jun-Zi Decoction attenuates colon cancer liver metastasis by increasing macrophage cells. Altern Ther Health Med 2019; 19:86. [PMID: 31014289 PMCID: PMC6477719 DOI: 10.1186/s12906-019-2498-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 09/23/2017] [Accepted: 04/11/2019] [Indexed: 01/20/2023]
Abstract
BACKGROUND The modified Si-Jun-Zi Decoction (SJZ), a Chinese medicine formula, is clinically used against multiple malignancies including colorectal cancer (CRC). This study aims to evaluate the effect of modified SJZ on CRC liver metastasis and identify the therapeutic mechanisms. METHODS Human CRC cells with GFP fluorescence were transplanted into Balb/c nude mice spleens. Modified SJZ, 5-fluorouracil or the combined treatment was given for 3 weeks. CRC liver metastasis was measured by fluorescence imaging and plasma cytokines were analyzed. Furthermore, the effects of administration time and doses for the modified SJZ were investigated in nude mice. RESULTS Modified SJZ could increase the survival rate and reduce CRC liver metastasis in the nude mice model. Plasma GM-CSF level was elevated. Three weeks of treatment with the modified SJZ at the full dose (45 g/kg) could significantly increase the number of macrophages but not neutrophils in the spleen. CONCLUSIONS These results indicate that modified SJZ can inhibit CRC liver metastasis by activating the innate immune system, providing a complementary and alternative therapy for CRC.
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Jeong HJ, Yoo RJ, Kim JK, Kim MH, Park SH, Kim H, Lim JW, Do SH, Lee KC, Lee YJ, Kim DW. Macrophage cell tracking PET imaging using mesoporous silica nanoparticles via in vivo bioorthogonal F-18 labeling. Biomaterials 2019; 199:32-9. [PMID: 30735894 DOI: 10.1016/j.biomaterials.2019.01.043] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 01/01/2019] [Accepted: 01/30/2019] [Indexed: 11/20/2022]
Abstract
We introduce an efficient cell tracking imaging protocol using positron emission tomography (PET). Since macrophages are known to home and accumulate in tumor tissues and atherosclerotic plaque, we design a PET imaging protocol for macrophage cell tracking using aza-dibenzocyclooctyne-tethered PEGylated mesoporous silica nanoparticles (DBCO-MSNs) with the short half-life F-18-labeled azide-radiotracer via an in vivo strain-promoted alkyne azide cycloaddition (SPAAC) covalent labeling reaction inside macrophage cells in vivo. This PET imaging protocol for in vivo cell tracking successfully visualizes the migration of macrophage cells into the tumor site by the bioorthogonal SPAAC reaction of DBCO-MSNs with [18F]fluoropentaethylene glycolic azide ([18F]2) to form 18F-labeled aza-dibenzocycloocta-triazolic MSNs (18F-DBCOT-MSNs) inside RAW 264.7 cells. The tissue radioactivity distribution results were consistent with PET imaging findings. In addition, PET images of atherosclerosis in ApoE-/- mice fed a western diet for 30 weeks were obtained using the devised macrophage cell-tracking protocol.
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Yu J, Deng Y, Tao Z, Liang W, Guan X, Wu J, Ning X, Liu Y, Liu Q, He Z. The effects of HAP and macrophage cells to the expression of inflammatory factors and apoptosis in HK-2 cells of vitro co-cultured system. Urolithiasis 2018; 46:429-43. [PMID: 29236151 DOI: 10.1007/s00240-017-1032-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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: 04/27/2017] [Accepted: 11/11/2017] [Indexed: 01/26/2023]
Abstract
This study developed an in vitro system by co-culturing HK-2 cells with different concentration of hydroxyapatite (HAP) and/or macrophage cells to simulate the internal environment of urolithiasis as far as possible, investigating the regulatory effects of macrophage cells on HAP-induced expression of relative inflammatory factors of HK-2 cells. The control group (H group) was only comprised of HK-2 cells. Experimental groups included co-culturing HK-2 cells and macrophage cells (H + M group), co-culturing HK-2 cells and HAP (H + A group), co-culturing macrophage cells and HAP (M + A group), and co-culturing HK-2 cells and macrophage cells with HAP (H + M + A group). In the H + A, M + A, and H + M + A group, we set the concentration of HAP as 5 μg/cm2 (A1) and 10 μg/cm2 (A2). After co-culturing for 2, 4, and 6 h, we detected the expression of CCL-2 in the liquid by ELISA. We tested the expression of LDH and ROS to evaluate the damage of HK-2 cells. We assessed the apoptosis of HK-2 cells using DAPI staining assay, flow cytometry, and the rate of BAX/BCL-2. Western Blotting detected OPN, Fetuin-A, BAX, and BCL-2 of HK-2 cells. The expression of CCL-2 in the medium of H + A1 and H + A2 group increased significantly compared with the control (P < 0.05); CCL-2 of M + A1 and M + A2 group was higher than the H + A1 and H + A2 group (P < 0.05). The expression of CCL-2 in H + M + A1 and H + M + A2 group was also higher than M + A1 and M + A2 group (P < 0.05). Compared with control, the expression of OPN, LDH release, the ratio of BAX/BCL-2, and the generation of ROS in HK-2 cells increased in a dose- and time-dependent manner. Compared with the control, the expression of Fetuin-A decreased in various degrees at different incubation periods. Especially when co-culturing for 6 h, Fetuin-A decreased most seriously in the H + M + A1 group. (1) The HAP can induce the HK-2 cells oxidative stress and inflammatory damage and apoptosis, when adding the macrophages to co-culture, macrophage cells can aggravate the damage and apoptosis of the HK-2 cells. (2) After the stimulation of HAP, the expression of OPN in HK-2 cells increased in a time- and dose-dependent manner; macrophage cells can aggravate the increase of OPN in HK-2 cells. (3) In the HAP and HK-2 cells co-cultured system, the low-level Fetuin-A of HK-2 cells may be related to the excessive consumption of Fetuin-A in the process of HAP-induced renal tubular epithelial cell excessive oxidative stress, inflammatory injury, and cell apoptosis. When adding macrophage cells to co-culture, Fetuin-A decreased even more seriously, it reminds us that macrophage cells can slightly regulate the expression of Fetuin-A in the HK-2 cells.
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Zhu WW, Wang SR, Liu ZH, Cao YJ, Wang F, Wang J, Liu CF, Xie Y, Xie Y, Zhang YL. Gly[14]-humanin inhibits ox-LDL uptake and stimulates cholesterol efflux in macrophage-derived foam cells. Biochem Biophys Res Commun 2016; 482:93-99. [PMID: 27815075 DOI: 10.1016/j.bbrc.2016.10.138] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [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: 10/23/2016] [Accepted: 10/28/2016] [Indexed: 12/16/2022]
Abstract
Foam cell formation, which is caused by imbalanced cholesterol influx and efflux by macrophages, plays a vital role in the occurrence and development of atherosclerosis. Humanin (HN), a mitochondria-derived peptide, can prevent the production of reactive oxygen species and death of human aortic endothelial cells exposed to oxidized low-density lipoprotein (ox-LDL) and has a protective effect on patients with in early atherosclerosis. However, the effects of HN on the regulation of cholesterol metabolism in RAW 264.7 macrophages are still unknown. This study was designed to investigate the role of [Gly14]-humanin (HNG) in lipid uptake and cholesterol efflux in RAW 264.7 macrophages. Flow cytometry and live cell imaging results showed that HNG reduced Dil-ox-LDL accumulation in the RAW 264.7 macrophages. A similar result was obtained for lipid accumulation by measuring cellular cholesterol content. Western blot analysis showed that ox-LDL treatment upregulated not only the protein expression of CD36 and LOX-1, which mediate ox-LDL endocytosis, but also ATP-binding cassette (ABC) transporter A1 and ABCG1, which mediate ox-LDL exflux. HNG pretreatment inhibited the upregulation of CD36 and LOX-1 levels, prompting the upregulation of ABCA1 and ABCG1 levels induced by ox-LDL. Therefore we concluded that HNG could inhibit ox-LDL-induced macrophage-derived foam cell formation, which occurs because of a decrease in lipid uptake and an increase in cholesterol efflux from macrophage cells.
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Affiliation(s)
- Wa-Wa Zhu
- Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Shu-Rong Wang
- Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Zhi-Hua Liu
- Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Yong-Jun Cao
- Department of Neurology, Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Fen Wang
- Institute of Neuroscience, Soochow University, Suzhou 215123, China
| | - Jing Wang
- Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Chun-Feng Liu
- Department of Neurology, Second Affiliated Hospital of Soochow University, Suzhou 215004, China; Institute of Neuroscience, Soochow University, Suzhou 215123, China
| | - Ying Xie
- Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China.
| | - Ying Xie
- Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Yan-Lin Zhang
- Department of Neurology, Second Affiliated Hospital of Soochow University, Suzhou 215004, China.
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Kang X, Zhang X, Zhao A. Macrophage depletion and TNF-α inhibition prevent resorption in CBA/J × DBA/2 model of CpG-induced abortion. Biochem Biophys Res Commun 2015; 469:704-10. [PMID: 26686416 DOI: 10.1016/j.bbrc.2015.12.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 12/04/2015] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To elucidate the mechanism by which embryo-resorption was enhanced by pathogenic CpG ODN motif in abortion-prone CBA/J × DBA/2 model and to develop a counter strategy for normal pregnancy outcome. METHODS This is an animal model-based study. Abortion-prone model is established by CBA/J × DBA/2. An infection was mimicked by CpG ODN injection. RESULTS Embryo-resorption was readily induced by CpG ODN in low doses of CpG ODN (∼25 μg/dam) when intraperitoneally (IP) injected on gestational day(gd) 6.5 in male DBA/2 mated CBA/J female mice. A more modest decline in Progesterone(P4), but not Estrogen(E2) was observed after exposure to CpG ODN in the model. P4 supplement fail to improve pregnancy outcomes, even at pharmocology dose. CpG ODN-induced fetal resorption is prevented by the treatment of anti-F4/80 or by that of anti-TNFα.In the implantation sites, the treatment of anti-F4/80 inhibits the increase both of F4/80(+) macrophage proportion and TNF-αexpression level which are induced by CpG ODN. The anti-TNFαtreatment also recovers CpG ODN-induced reduction of CD4(+)Foxp3(+) T cells. CONCLUSION Circulating P4 is not responsible for the process by which CpG ODN-induced embryonic resorption in an abortion-prone mice. Macrophage depletion and TNF-α inhibition are really noteworthy for CpG ODN-induced pregnancy disruption.
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Affiliation(s)
- Xiaomin Kang
- Department of Obstetrics and Gynecology, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, 200127, PR China; Shanghai Key Laboratory of Gynecologic Oncology, Shanghai, 200127, PR China
| | - Xiaoxin Zhang
- Department of Obstetrics and Gynecology, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, 200127, PR China; Shanghai Key Laboratory of Gynecologic Oncology, Shanghai, 200127, PR China
| | - Aimin Zhao
- Department of Obstetrics and Gynecology, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, 200127, PR China; Shanghai Key Laboratory of Gynecologic Oncology, Shanghai, 200127, PR China.
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Abstract
Atherosclerosis is the most common pathological process that leads to cardiovascular diseases, a disease of large- and medium-sized arteries that is characterized by a formation of atherosclerotic plaques consisting of necrotic cores, calcified regions, accumulated modified lipids, smooth muscle cells (SMCs), endothelial cells, leukocytes, and foam cells. Recently, the question about how to suppress the occurrence of atherosclerosis and alleviate the progress of cardiovascular disease becomes the hot topic. Accumulating evidence suggests that histone deacetylases(HDACs) play crucial roles in arteriosclerosis. This review summarizes the effect of HDACs and HDAC inhibitors(HDACi) on the progress of atherosclerosis.
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Affiliation(s)
- Xia-xia Zheng
- Department of Cardiology, The First College of Clinical Medical Sciences, China Three Gorges University, Yichang 443000, Hubei Province, China; Institute of Cardiovascular Diseases, China Three Gorges University, Yichang 443000, Hubei Province, China
| | - Tian Zhou
- Department of Cardiology, The First College of Clinical Medical Sciences, China Three Gorges University, Yichang 443000, Hubei Province, China; Institute of Cardiovascular Diseases, China Three Gorges University, Yichang 443000, Hubei Province, China
| | - Xin-An Wang
- Department of Cardiology, The First College of Clinical Medical Sciences, China Three Gorges University, Yichang 443000, Hubei Province, China; Institute of Cardiovascular Diseases, China Three Gorges University, Yichang 443000, Hubei Province, China
| | - Xiao-hong Tong
- Department of Cardiology, The First College of Clinical Medical Sciences, China Three Gorges University, Yichang 443000, Hubei Province, China; Institute of Cardiovascular Diseases, China Three Gorges University, Yichang 443000, Hubei Province, China
| | - Jia-wang Ding
- Department of Cardiology, The First College of Clinical Medical Sciences, China Three Gorges University, Yichang 443000, Hubei Province, China; Institute of Cardiovascular Diseases, China Three Gorges University, Yichang 443000, Hubei Province, China.
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Abdulkhalek S, Szewczuk MR. Neu1 sialidase and matrix metalloproteinase-9 cross-talk regulates nucleic acid-induced endosomal TOLL-like receptor-7 and -9 activation, cellular signaling and pro-inflammatory responses. Cell Signal 2013; 25:2093-105. [PMID: 23827939 DOI: 10.1016/j.cellsig.2013.06.010] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 06/05/2013] [Accepted: 06/18/2013] [Indexed: 11/20/2022]
Abstract
The precise mechanism(s) by which intracellular TOLL-like receptors (TLRs) become activated by their ligands remains unclear. Here, we report a molecular organizational G-protein coupled receptor (GPCR) signaling platform to potentiate a novel mammalian neuraminidase-1 (Neu1) and matrix metalloproteinase-9 (MMP-9) cross-talk in alliance with neuromedin B GPCR, all of which form a tripartite complex with TLR-7 and -9. siRNA silencing Neu1, MMP-9 and neuromedin-B GPCR in RAW-blue macrophage cells significantly reduced TLR7 imiquimod- and TLR9 ODN1826-induced NF-κB (NF-κB-pSer(536)) activity. Tamiflu, specific MMP-9 inhibitor, neuromedin B receptor specific antagonist BIM23127, and the selective inhibitor of whole heterotrimeric G-protein complex BIM-46174 significantly block nucleic acid-induced TLR-7 and -9 MyD88 recruitment, NF-κB activation and proinflammatory TNFα and MCP-1 cytokine responses. For the first time, Neu1 clearly plays a central role in mediating nucleic acid-induced intracellular TLR activation, and the interactions involving NMBR-MMP9-Neu1 cross-talk constitute a novel intracellular TLR signaling platform that is essential for NF-κB activation and pro-inflammatory responses.
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