101
|
Rahimifard M, Maqbool F, Moeini-Nodeh S, Niaz K, Abdollahi M, Braidy N, Nabavi SM, Nabavi SF. Targeting the TLR4 signaling pathway by polyphenols: A novel therapeutic strategy for neuroinflammation. Ageing Res Rev 2017; 36:11-19. [PMID: 28235660 DOI: 10.1016/j.arr.2017.02.004] [Citation(s) in RCA: 314] [Impact Index Per Article: 44.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 02/11/2017] [Accepted: 02/16/2017] [Indexed: 01/08/2023]
Abstract
A wide array of cell signaling mediators and their interactions play vital roles in neuroinflammation associated with ischemia, brain trauma, developmental disorders and age-related neurodegeneration. Along with neurons, microglia and astrocytes are also affected by the inflammatory cascade by releasing pro-inflammatory cytokines, chemokines and reactive oxygen species. The release of pro-inflammatory mediators in response to neural dysfunction may be helpful, neutral or even deleterious to normal cellular survival. Moreover, the important role of NF-κB factors in the central nervous system (CNS) through toll-like receptor (TLR) activation has been well established. This review demonstrates recent findings regarding therapeutic aspects of polyphenolic compounds for the treatment of neuroinflammation, with the aim of regulating TLR4. Polyphenols including flavonoids, phenolic acids, phenolic alcohols, stilbenes and lignans, can target TLR4 signaling pathways in multiple ways. Toll interacting protein expression could be modulated by epigallocatechin-3-gallate. Resveratrol may also exert neuroprotective effects via the TLR4/NF-κB/STAT signaling cascade. Its role in activation of cascade via interfering with TLR4 oligomerization upon receptor stimulation has also been reported. Curcumin, another polyphenol, can suppress overexpression of inflammatory mediators via inhibiting the TLR4-MAPK/NF-κB pathway. It can also reduce neuronal apoptosis via a mechanism concerning the TLR4/MyD88/NF-κB signaling pathway in microglia/macrophages. Despite a symphony of in vivo and in vitro studies, many molecular and pharmacological aspects of neuroinflammation remain unclear. It is proposed that natural compounds targeting TLR4 may serve as important pharmacophores for the development of potent drugs for the treatment of neurological disorders.
Collapse
|
102
|
Andrographolide Inhibits Inflammatory Cytokines Secretion in LPS-Stimulated RAW264.7 Cells through Suppression of NF- κB/MAPK Signaling Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 2017:8248142. [PMID: 28676833 PMCID: PMC5476883 DOI: 10.1155/2017/8248142] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 03/16/2017] [Accepted: 04/11/2017] [Indexed: 11/17/2022]
Abstract
Andrographolide, the main active component extracted from Andrographis paniculata (Burm.f.) Wall. ex Nees, exerts anti-inflammatory effects; however, the principal molecular mechanisms remain unclear. The objective of this study was to investigate the molecular mechanisms of Andrographolide in modifying lipopolysaccharide- (LPS-) induced signaling pathway in RAW264.7 cells. An in vitro model of inflammation was induced by LPS in mouse RAW264.7 cells in the presence of Andrographolide. The concentration and expression levels of proinflammatory cytokines were determined by an enzyme-linked immunosorbent assay (ELISA) and quantitative real-time polymerase chain reaction (qRT-PCR), respectively. The nuclear level of NF-κB was measured by an electrophoretic mobility shift assay (EMSA). The expression levels of NF-κB, p38, ERK, and JNK were determined by western blot. Andrographolide dose-dependently inhibited the release and mRNA expression of TNF-α, IL-6, and IL-1β in LPS-stimulated RAW264.7 cells. The nuclear level of p65 protein was decreased in Andrographolide treatment group. Western blot analysis showed that Andrographolide suppressed LPS-induced NF-κB activation and the phosphorylation of IkBa, ERK1/2, JNK, and p38. These results suggest that Andrographolide exerts an anti-inflammatory effect by inhibiting the activation of NF-κB/MAPK signaling pathway and the induction of proinflammatory cytokines.
Collapse
|
103
|
Wang G, Hu Z, Fu Q, Song X, Cui Q, Jia R, Zou Y, He C, Li L, Yin Z. Resveratrol mitigates lipopolysaccharide-mediated acute inflammation in rats by inhibiting the TLR4/NF-κBp65/MAPKs signaling cascade. Sci Rep 2017; 7:45006. [PMID: 28322346 PMCID: PMC5359552 DOI: 10.1038/srep45006] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 02/17/2017] [Indexed: 01/01/2023] Open
Abstract
Resveratrol (RSV) is a natural compound exhibiting anti-inflammatory effect, but the anti-inflammatory mechanism has not been fully understood. This study is aimed to evaluate the anti-inflammatory activity and mechanism of RSV in lipopolysaccharides-induced rats’ model. The visceral wet/dry weight ratios and the changes of hematologic and biochemical indices indicated that LPS- stimulation mainly caused damages to liver and lung, while pretreatment with RSV could alleviate the lesions. The cytokine assays showed that RSV could markedly decrease the production of proinflammatory mediators and cytokines (IL-1, IL-1β, IL-6, NO, iNOS and COX-2), and increase the expression of anti-inflammatory mediator (IL-10). RSV could inhibit TLR4 signaling pathway by down-regulating the mRNA levels of MyD88 and TRAF6, and suppressing the TLR4 protein. RSV could inhibit the signaling cascades of NF-κBp65 and MAPKs through down-regulating the mRNA levels of IκBα, p38MAPK, JNK, ERK1, ERK2 and ERK5 in liver and lung, and suppressing the dynamic changes of proteins and phosphorylated proteins including IκBα, NF-κBp65, p38MAPK, JNK, ERK1/2 and ERK5 from tissue’s cytoplasm to nucleus. In conclusion, RSV possessed a therapeutic effect on LPS-induced inflammation in rats and the mechanism mainly attributed to suppressing the signaling cascades of NF-κBp65 and MAPKs by inhibiting the TLR4 signaling pathway.
Collapse
Affiliation(s)
- Guangxi Wang
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zhiqiang Hu
- Key laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qiuting Fu
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xu Song
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qiankun Cui
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Renyong Jia
- Key laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yuanfeng Zou
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Changliang He
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Lixia Li
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zhongqiong Yin
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| |
Collapse
|
104
|
Li HY, Yang M, Li Z, Meng Z. Curcumin inhibits angiotensin II-induced inflammation and proliferation of rat vascular smooth muscle cells by elevating PPAR-γ activity and reducing oxidative stress. Int J Mol Med 2017; 39:1307-1316. [PMID: 28339005 DOI: 10.3892/ijmm.2017.2924] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Accepted: 03/08/2017] [Indexed: 11/06/2022] Open
Abstract
Angiotensin II (AngII)-induced production of inflammatory factors and proliferation in vascular smooth muscle cells (VSMCs) play an important role in the progression of atherosclerotic plaques. Growing evidence has demonstrated that activation of peroxisome proliferator-activated receptor-γ (PPAR-γ) effectively attenuates AngII-induced inflammation and intercellular reactive oxygen species (iROS) production. Curcumin (Cur) inhibits inflammatory responses by enhancing PPAR-γ activity and reducing oxidative stress in various tissues. The aim of the present study was to ascertain whether Cur inhibits AngII-induced inflammation and proliferation, and its underlying molecular mechanism, in VSMCs. Enzyme-linked immunosorbent assay (ELISA) and real-time PCR were used to measure the protein and mRNA expression of interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α). Nitric oxide (NO) production was measured by Griess reaction. Western blot analysis and a DNA-binding assay were used to measure PPAR-γ activity. iROS production was measured using the DCFH-DA method. In rat VSMCs, Cur attenuated AngII‑induced expression of IL-6 and TNF-α mRNA and protein in a concentration-dependent manner, inhibited NO production by suppressing inducible NO synthase (iNOS) activity, and suppressed proliferation of VSMCs. This was accompanied by increased PPAR-γ expression and activation in Cur-pretreated VSMCs. GW9662, a PPAR-γ antagonist, reversed the anti-inflammatory effect of Cur. Moreover, Cur attenuated AngII-induced oxidative stress by downregulating the expression of p47phox, which is a key subunit of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase. In conclusion, Cur inhibited the expression of IL-6 and TNF-α, decreased the production of NO, and suppressed the proliferation of VSMCs, by elevating PPAR-γ activity and suppressing oxidative stress, leading to attenuated AngII-induced inflammatory responses in VSMCs.
Collapse
Affiliation(s)
- Hai-Yu Li
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Mei Yang
- Department of General Medicine, Renji Hospital of Shanghai Jiaotong University, Shanghai 200000, P.R. China
| | - Ze Li
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Zhe Meng
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| |
Collapse
|
105
|
Karimian MS, Pirro M, Majeed M, Sahebkar A. Curcumin as a natural regulator of monocyte chemoattractant protein-1. Cytokine Growth Factor Rev 2017; 33:55-63. [DOI: 10.1016/j.cytogfr.2016.10.001] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 10/06/2016] [Indexed: 12/26/2022]
|
106
|
Fluorescent real-time quantitative measurements of intracellular peroxynitrite generation and inhibition. Anal Biochem 2017; 520:44-48. [PMID: 28063851 DOI: 10.1016/j.ab.2017.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 11/15/2016] [Accepted: 01/03/2017] [Indexed: 12/19/2022]
Abstract
Peroxynitrite (ONOO-), a strong oxidant species, is produced by the reaction of nitric oxide (NO) and superoxide (O2.-) radicals. It plays an important role as a biological regulator in numbers of physiological and pathological processes. In this study, we developed fluorescence-based real-time quantitative measurements to detect intracellular ONOO-. The probe DAX-J2 PON Green showed high selectivity toward ONOO- over other competing species, and has been successfully applied in microplate reader and flow cytometer to quantitatively measure endogenous ONOO- production. Moreover, the results demonstrated the inhibitory effects of curcumin on intracellular ONOO- generation.
Collapse
|
107
|
Li R, Zhao L, Tong J, Yan Y, Xu C. Fine Particulate Matter and Sulfur Dioxide Coexposures Induce Rat Lung Pathological Injury and Inflammatory Responses Via TLR4/p38/NF-κB Pathway. Int J Toxicol 2016; 36:165-173. [PMID: 28033732 DOI: 10.1177/1091581816682225] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Fine particulate matter (PM2.5) and sulfur dioxide (SO2) are 2 common air pollutants, but their toxicological effects of coexposure are still not fully clear. In this study, SO2 exposure (5.6 mg/m3) couldn't cause obvious inflammatory responses in rat lungs. The PM2.5 exposure (1.5 mg/kg body weight) increased inflammatory cell counts in bronchoalveolar lavage fluid (BALF) and some inflammation damage. Importantly, SO2 and PM2.5 (1.5, 6.0, and 24.0 mg/kg) coexposure induced pathological and ultrastructural damage and raised inflammatory cells in BALF compared with the control. Also, they significantly elevated the levels of pro-inflammatory cytokines, adhesion molecule, and nitric oxide (NO) and promoted the gene expression of nuclear factor kappa B (NF-κB), phosphorylated p38 (p-p38), and Toll-like receptor 4 (TLR4) in rat lungs treated with higher dose of PM2.5 (6.0 and 24.0 mg/kg) plus SO2 relative to the control or SO2 group, along with the decreased inhibitor of NF-κBα and increased inhibitor of NF-κB kinase β expressions. The changes in the inflammatory markers in the presence of PM2.5 plus SO2 were not significant compared with the PM2.5 group. The results indicated that inflammatory injury and pathological and ultrastructural damage in rat lungs exposed to PM2.5 plus SO2 were involved in TLR4/p38/NF-κB pathway activation accompanied by oversecretion of pro-inflammatory cytokine, adhesion molecule, and NO. It provides more useful evidence to understand the possible toxicological mechanism that PM2.5 and SO2 copollution exacerbate lung disease.
Collapse
Affiliation(s)
- Ruijin Li
- 1 Institute of Environmental Science, Shanxi University, Taiyuan, People's Republic of China
| | - Lifang Zhao
- 1 Institute of Environmental Science, Shanxi University, Taiyuan, People's Republic of China
| | - Jinlong Tong
- 1 Institute of Environmental Science, Shanxi University, Taiyuan, People's Republic of China
| | - Yuchao Yan
- 1 Institute of Environmental Science, Shanxi University, Taiyuan, People's Republic of China
| | - Chong Xu
- 1 Institute of Environmental Science, Shanxi University, Taiyuan, People's Republic of China
| |
Collapse
|
108
|
Abstract
AIM Multiple Organ Dysfunction Syndrome (MODS) is characterized as progressive and uncontrolled inflammatory response which involves activation of inflammatory cascades, cytokines release, and endothelial dysfunction, leading to deterioration of several organ functions. Curcumin is a natural polyphenol related to the yellow color of turmeric and has been reported to exert an anti-inflammatory, anti-oxidative, and anti-tumor effect. We conducted the study to investigate the effects of curcumin in non-septic MODS caused by zymosan in mice model. METHOD The mice were randomly allocated into five groups (six mice per group): control group (treated with physiological saline, 0.1 mL daily for 3 days before and 1 h after physiological saline treatment), DMSO group (treated with DMSO, 0.1 mL daily for 3 days before and 1 h after physiological saline treatment), Curcumin group (200 mg/kg, suspended in DMSO, in a final volume of 0.1 mL, used for 3 days daily before and 1 h after physiological saline treatment), Zymosan+DMSO group (treated with DMSO, 0.1 mL daily for 3 days before and 1 h after zymosan treatment) and Zymosan+ Curcumin group (treated with curcumin, suspended in DMSO at a dose of 0.1 mL daily for 3 days before and 1 h after zymosan treatment).Mice in groups were sacrificed, and then the blood and tissues were collected to evaluate the severity of acute peritonitis, tissue histopathological changes, NO formation, oxidative stress, PMN infiltration, cytokines production, organ function, and NF-κB activation 18 h after when zymosan or physiological saline was injected. In another set of experiments, the mice were also grouped (20 mice per group) for monitoring the loss of body weight and mortality for 7 days after zymosan or physiological saline administration. RESULTS Curcumin induces a significant reduction of the volume exudate and the neutrophil infiltration. It also could exhibit an outstanding protective effect against histopathological injury by decreasing the NO formation, oxidative stress, cytokines production, and infiltration of inflammatory cells. The organ function is also improved by administration of curcumin. Moreover, the activation of NF-κB is attenuated by curcumin in the MODS mice model, suggesting that curcumin attenuated the zymosan-induced MODS via inhibiting the expression of NF-κB possibly. In addition, curcumin-treated mice were shown to alleviate the severity of MODS characterized by a minor systemic toxicity, less body weight loss, and lower mortality caused by zymosan administration. CONCLUSION Curcumin attenuates zymosan-induced MODS.
Collapse
|
109
|
Lu XL, Zhao CH, Yao XL, Zhang H. Quercetin attenuates high fructose feeding-induced atherosclerosis by suppressing inflammation and apoptosis via ROS-regulated PI3K/AKT signaling pathway. Biomed Pharmacother 2016; 85:658-671. [PMID: 27919735 DOI: 10.1016/j.biopha.2016.11.077] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 11/07/2016] [Accepted: 11/16/2016] [Indexed: 12/28/2022] Open
Abstract
Quercetin is a dietary flavonoid compound extracted from various plants, such as apple and onions. Previous studies have revealed its anti-inflammatory, anti-cancer, antioxidant and anti-apoptotic activities. This study investigated the ability of quercetin to inhibit high fructose feeding- or LPS-induced atherosclerosis through regulating oxidative stress, apoptosis and inflammation response in vivo and in vitro experiments. 50 and 100mg/kg quercetin were used in our study, showing significant inhibitory role in high fructose-induced atherosclerosis via reducing reactive oxygen species (ROS) levels, Caspase-3 activation, inflammatory cytokines releasing, the number of terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL)-positive cells and collagen contents as well as modulating apoptosis- and inflammation-related proteins expression. We also explored the protective effects of quercetin on atherosclerosis by phosphatidylinositide 3-kinases (PI3K)/Protein kinase B (AKT)-associated Bcl-2/Caspase-3 and nuclear factor kappa B (NF-κB) signal pathways activation, promoting AKT and Bcl-2 expression and reducing Caspase-3 and NF-κB activation. Quercetin reduced the atherosclerotic plaque size in vivo in high fructose feeding-induced mice assessed by oil red O. Also, in vitro experiments, quercetin displayed inhibitory role in LPS-induced ROS production, inflammatory response and apoptosis, which were linked with PI3K/AKT-regulated Caspase-3 and NF-κB activation. In conclusion, our results showed that quercetin inhibited atherosclerotic plaque development in high fructose feeding mice via PI3K/AKT activation regulated by ROS.
Collapse
Affiliation(s)
- Xue-Li Lu
- Department of Cardiology, Huaihe Hospital, Henan University, Kaifeng 475000, China.
| | - Cui-Hua Zhao
- Department of Cardiology, Huaihe Hospital, Henan University, Kaifeng 475000, China
| | - Xin-Liang Yao
- Department of Cardiology, Huaihe Hospital, Henan University, Kaifeng 475000, China
| | - Han Zhang
- Department of Cardiology, Huaihe Hospital, Henan University, Kaifeng 475000, China
| |
Collapse
|
110
|
Enhanced anti-inflammatory activity of brown seaweed Laminaria japonica by fermentation using Bacillus subtilis. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.08.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
|
111
|
Tian Y, Wang J, Wang W, Ding Y, Sun Z, Zhang Q, Wang Y, Xie H, Yan S, Zheng S. Mesenchymal stem cells improve mouse non-heart-beating liver graft survival by inhibiting Kupffer cell apoptosis via TLR4-ERK1/2-Fas/FasL-caspase3 pathway regulation. Stem Cell Res Ther 2016. [DOI: 2778867410.1186/s13287-016-0416-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Abstract
Background
Liver transplantation is the optimal treatment option for end-stage liver disease, but organ shortages dramatically restrict its application. Donation after cardiac death (DCD) is an alternative approach that may expand the donor pool, but it faces challenges such as graft dysfunction, early graft loss, and cholangiopathy. Moreover, DCD liver grafts are no longer eligible for transplantation after their warm ischaemic time exceeds 30 min. Mesenchymal stem cells (MSCs) have been proposed as a promising therapy for treatment of certain liver diseases, but the role of MSCs in DCD liver graft function remains elusive.
Methods
In this study, we established an arterialized mouse non-heart-beating (NHB) liver transplantation model, and compared survival rates, cytokine and chemokine expression, histology, and the results of in vitro co-culture experiments in animals with or without MSC infusion.
Results
MSCs markedly ameliorated NHB liver graft injury and improved survival post-transplantation. Additionally, MSCs suppressed Kupffer cell apoptosis, Th1/Th17 immune responses, chemokine expression, and inflammatory cell infiltration. In vitro, PGE2 secreted by MSCs inhibited Kupffer cell apoptosis via TLR4-ERK1/2-caspase3 pathway regulation.
Conclusion
Our study uncovers a protective role for MSCs and elucidates the underlying immunomodulatory mechanism in an NHB liver transplantation model. Our results suggest that MSCs are uniquely positioned for use in future clinical studies owing to their ability to protect DCD liver grafts, particularly in patients for whom DCD organs are not an option according to current criteria.
Collapse
|
112
|
Tian Y, Wang J, Wang W, Ding Y, Sun Z, Zhang Q, Wang Y, Xie H, Yan S, Zheng S. Mesenchymal stem cells improve mouse non-heart-beating liver graft survival by inhibiting Kupffer cell apoptosis via TLR4-ERK1/2-Fas/FasL-caspase3 pathway regulation. Stem Cell Res Ther 2016; 7:157. [PMID: 27788674 PMCID: PMC5084468 DOI: 10.1186/s13287-016-0416-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 09/20/2016] [Accepted: 10/01/2016] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Liver transplantation is the optimal treatment option for end-stage liver disease, but organ shortages dramatically restrict its application. Donation after cardiac death (DCD) is an alternative approach that may expand the donor pool, but it faces challenges such as graft dysfunction, early graft loss, and cholangiopathy. Moreover, DCD liver grafts are no longer eligible for transplantation after their warm ischaemic time exceeds 30 min. Mesenchymal stem cells (MSCs) have been proposed as a promising therapy for treatment of certain liver diseases, but the role of MSCs in DCD liver graft function remains elusive. METHODS In this study, we established an arterialized mouse non-heart-beating (NHB) liver transplantation model, and compared survival rates, cytokine and chemokine expression, histology, and the results of in vitro co-culture experiments in animals with or without MSC infusion. RESULTS MSCs markedly ameliorated NHB liver graft injury and improved survival post-transplantation. Additionally, MSCs suppressed Kupffer cell apoptosis, Th1/Th17 immune responses, chemokine expression, and inflammatory cell infiltration. In vitro, PGE2 secreted by MSCs inhibited Kupffer cell apoptosis via TLR4-ERK1/2-caspase3 pathway regulation. CONCLUSION Our study uncovers a protective role for MSCs and elucidates the underlying immunomodulatory mechanism in an NHB liver transplantation model. Our results suggest that MSCs are uniquely positioned for use in future clinical studies owing to their ability to protect DCD liver grafts, particularly in patients for whom DCD organs are not an option according to current criteria.
Collapse
Affiliation(s)
- Yang Tian
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Key Laboratory of Organ Transplantation, Hangzhou, Zhejiang Province, China
| | - Jingcheng Wang
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Key Laboratory of Organ Transplantation, Hangzhou, Zhejiang Province, China
| | - Wei Wang
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Key Laboratory of Organ Transplantation, Hangzhou, Zhejiang Province, China
| | - Yuan Ding
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Zhongquan Sun
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Qiyi Zhang
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yan Wang
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Key Laboratory of Organ Transplantation, Hangzhou, Zhejiang Province, China
| | - Haiyang Xie
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Key Laboratory of Organ Transplantation, Hangzhou, Zhejiang Province, China.,Collaborative Innovation Center for Diagnosis Treatment of Infectious Diseases, Hangzhou, Zhejiang Province, China
| | - Sheng Yan
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Key Laboratory of Organ Transplantation, Hangzhou, Zhejiang Province, China. .,Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China. .,Collaborative Innovation Center for Diagnosis Treatment of Infectious Diseases, Hangzhou, Zhejiang Province, China.
| | - Shusen Zheng
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Key Laboratory of Organ Transplantation, Hangzhou, Zhejiang Province, China. .,Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China. .,Collaborative Innovation Center for Diagnosis Treatment of Infectious Diseases, Hangzhou, Zhejiang Province, China.
| |
Collapse
|
113
|
Li S, Cheng L, An D, Song S, Liang H, Chu F, Ji A. Whitmania Pigra Whitman Extracts Inhibit Lipopolysaccharide Induced Rat Vascular Smooth Muscle Cells Migration and their Adhesion Ability to THP-1 and RAW 264.7 Cells. J Atheroscler Thromb 2016; 24:301-311. [PMID: 27592629 PMCID: PMC5383546 DOI: 10.5551/jat.36558] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Aim: Atherosclerosis is a kind of chronic inflammatory disease. A crucial pathology change of atherosclerosis is the migration of activated VSMCs to the intima where they interact with leukocytes by expressing adhesion molecules, including intercellular cell adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1). Moreover, monocyte chemoattractant protein-1 (MCP-1) expressed by VSMCs plays an important role in recruiting monocytes and macrophages. Leech (Whitmania pigra Whitman) is a traditional Chinese medicine to treat cardiovascular diseases including atherosclerosis, however previous research has rarely reported the molecular mechanism for its curative effect. Thus, our study focuses on the effects of leech extracts on the expression of inflammatory factors, adhesion molecules and MCP-1 in rat VSMCs. Methods: In our present study, wound-healing assay and Boyden chamber model were applied to evaluate the anti-migration effect of LEE (Leech Enzyme Extracts) on LPS induced VSMCs. The anti-adhesion effect was assessed using DiI-labeled THP-1 and RAW264.7. Results: LEE suppressed LPS-induced VSMCs migration and decreased the chemotaxis and adhesive capacity of THP-1 and RAW264.7 to LPS-stimulated VSMCs. LEE also attenuated the upregulation of a variety of pro-atherosclerotic factors by inhibiting the phosphorylation of p38 MAPK. LEE was also observed to prevent NF-κB p65 nuclear localization using immune-fluorescent staining. Conclusions: In conclusion, LEE suppresses LPS-induced upregulation of inflammatory factors, adhesion molecules and MCP-1 in rat VSMCs mainly via inhibiting the p38 MAPK/NF-κB pathways, thus partly uncovered LEE's molecular mechanisms for its therapeutic effect on atherosclerosis.
Collapse
|
114
|
Abstract
Although drug-eluting stents (DES) effectively improve the clinical efficacy of percutaneous coronary intervention, a high risk of late stent thrombosis and in-stent restenosis also exists after DES implantation. Anti-smooth muscle proliferation drugs, such as rapamycin, coating stents, not only inhibit the growth of vascular smooth muscle cells but also inhibit vascular endothelial cells and delay the reendothelialization. Therefore, the development of an ideal agent that protects vascular endothelial cells from rapamycin-eluting stents is of great importance for the next generation of DES. In this study, we demonstrated that rapamycin significantly inhibited the growth of rat aortic endothelial cells in both dose- and time-dependent manner in vitro. Cell apoptosis was increased and migration was decreased by rapamycin treatments in rat aortic endothelial cells in vitro. Surprisingly, treatment with curcumin, an active ingredient of turmeric, significantly reversed these detrimental effects of rapamycin. Moreover, curcumin increased the expression of vascular nitric oxide synthases (eNOS), which was decreased by rapamycin. Furthermore, caveolin-1, the inhibitor of eNOS, was decreased by curcumin. Knockdown of eNOS by small interfering RNA significantly abrogated the protective effects of curcumin. Taken together, our results suggest that curcumin antagonizes the detrimental effect of rapamycin on aortic endothelial cells in vitro through upregulating eNOS. Therefore, curcumin is a promising combined agent for the rescue of DES-induced reendothelialization delay.
Collapse
|
115
|
Hou M, Song Y, Li Z, Luo C, Ou JS, Yu H, Yan J, Lu L. Curcumin attenuates osteogenic differentiation and calcification of rat vascular smooth muscle cells. Mol Cell Biochem 2016; 420:151-60. [DOI: 10.1007/s11010-016-2778-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 07/30/2016] [Indexed: 11/30/2022]
|
116
|
Ding F, Li F, Li Y, Hou X, Ma Y, Zhang N, Ma J, Zhang R, Lang B, Wang H, Wang Y. HSP60 mediates the neuroprotective effects of curcumin by suppressing microglial activation. Exp Ther Med 2016; 12:823-828. [PMID: 27446282 DOI: 10.3892/etm.2016.3413] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 04/11/2016] [Indexed: 12/17/2022] Open
Abstract
Curcumin has anti-inflammatory and antioxidant properties and has been widely used to treat or prevent neurodegenerative diseases. However, the mechanisms underlying the neuroprotective effects of curcumin are not well known. In the present study, the effect of curcumin on lipopolysaccharide (LPS)-stimulated BV2 mouse microglia cells was investigated using enzyme-linked immunosorbent assays of the culture medium and western blotting of cell lysates. The results showed that curcumin significantly inhibited the LPS-induced expression and release of heat shock protein 60 (HSP60) in the BV2 cells. The level of heat shock factor (HSF)-1 was upregulated in LPS-activated BV2 microglia, indicating that the increased expression of HSP60 was driven by HSF-1 activation. However, the increased HSF-1 level was downregulated by curcumin. Extracellular HSP60 is a ligand of Toll-like receptor 4 (TLR-4), and the level of the latter was increased in the LPS-activated BV2 microglia and inhibited by curcumin. The activation of TLR-4 is known to be associated with the activation of myeloid differentiation primary response 88 (MyD88) and nuclear factor (NF)-κB, with the subsequent production of proinflammatory and neurotoxic factors. In the present study, curcumin demonstrated marked suppression of the LPS-induced expression of MyD88, NF-κB, caspase-3, inducible nitric oxide synthase, tumor necrosis factor-α, interleukin (IL)-1β and IL-6 in the microglia. These results indicate that curcumin may exert its neuroprotective and anti-inflammatory effects by inhibiting microglial activation through the HSP60/TLR-4/MyD88/NF-κB signaling wpathway. Therefore, curcumin may be useful for the treatment of neurodegenerative diseases that are associated with microglial activation.
Collapse
Affiliation(s)
- Feijia Ding
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Ningxia 750004, P.R. China
| | - Fan Li
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Ningxia 750004, P.R. China
| | - Yunhong Li
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Ningxia 750004, P.R. China
| | - Xiaolin Hou
- Department of Neurology, The General Hospital of Ningxia Medical University, Ningxia 750004, P.R. China
| | - Yi Ma
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Ningxia 750004, P.R. China
| | - Nan Zhang
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Ningxia 750004, P.R. China
| | - Jiao Ma
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Ningxia 750004, P.R. China
| | - Rui Zhang
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Ningxia 750004, P.R. China
| | - Bing Lang
- Department of ICU, The First People's Hospital of Yinchuan, Ningxia 750004, P.R. China
| | - Hongyan Wang
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Ningxia 750004, P.R. China
| | - Yin Wang
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Ningxia 750004, P.R. China
| |
Collapse
|
117
|
Tang ML, Zhong C, Liu ZY, Peng P, Liu XH, Sun X. Discovery of novel sesquistilbene indanone analogues as potent anti-inflammatory agents. Eur J Med Chem 2016; 113:63-74. [DOI: 10.1016/j.ejmech.2016.02.021] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 02/05/2016] [Accepted: 02/07/2016] [Indexed: 11/28/2022]
|
118
|
Zhang Y, Chen F, Chen J, Huang S, Chen J, Huang J, Li N, Sun S, Chu X, Zha L. Soyasaponin Bb inhibits the recruitment of toll-like receptor 4 (TLR4) into lipid rafts and its signaling pathway by suppressing the nicotinamide adenine dinucleotide phosphate (NADPH) oxidase-dependent generation of reactive oxygen species. Mol Nutr Food Res 2016; 60:1532-43. [DOI: 10.1002/mnfr.201600015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 03/07/2016] [Accepted: 03/09/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Yajie Zhang
- Department of Nutrition and Food Hygiene; Guangdong Provincial Key Laboratory of Tropical Disease Research; School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou Guangdong P. R. China
| | - Fengping Chen
- Department of Nutrition and Food Hygiene; Guangdong Provincial Key Laboratory of Tropical Disease Research; School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou Guangdong P. R. China
| | - Jiading Chen
- Department of Nutrition and Food Hygiene; Guangdong Provincial Key Laboratory of Tropical Disease Research; School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou Guangdong P. R. China
| | - Suqun Huang
- Department of Nutrition and Food Hygiene; Guangdong Provincial Key Laboratory of Tropical Disease Research; School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou Guangdong P. R. China
| | - Junbin Chen
- Department of Nutrition and Food Hygiene; Guangdong Provincial Key Laboratory of Tropical Disease Research; School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou Guangdong P. R. China
| | - Jian Huang
- Department of Nutrition and Food Hygiene; Guangdong Provincial Key Laboratory of Tropical Disease Research; School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou Guangdong P. R. China
| | - Nan Li
- Department of Nutrition and Food Hygiene; Guangdong Provincial Key Laboratory of Tropical Disease Research; School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou Guangdong P. R. China
| | - Suxia Sun
- Department of Nutrition and Food Hygiene; Guangdong Provincial Key Laboratory of Tropical Disease Research; School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou Guangdong P. R. China
| | - Xinwei Chu
- Department of Nutrition and Food Hygiene; Guangdong Provincial Key Laboratory of Tropical Disease Research; School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou Guangdong P. R. China
| | - Longying Zha
- Department of Nutrition and Food Hygiene; Guangdong Provincial Key Laboratory of Tropical Disease Research; School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou Guangdong P. R. China
| |
Collapse
|
119
|
Pulido-Moran M, Moreno-Fernandez J, Ramirez-Tortosa C, Ramirez-Tortosa M. Curcumin and Health. Molecules 2016; 21:264. [PMID: 26927041 PMCID: PMC6273481 DOI: 10.3390/molecules21030264] [Citation(s) in RCA: 306] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 02/08/2016] [Accepted: 02/22/2016] [Indexed: 12/14/2022] Open
Abstract
Nowadays, there are some molecules that have shown over the years a high capacity to act against relevant pathologies such as cardiovascular disease, neurodegenerative disorders or cancer. This article provides a brief review about the origin, bioavailability and new research on curcumin and synthetized derivatives. It examines the beneficial effects on health, delving into aspects such as cancer, cardiovascular effects, metabolic syndrome, antioxidant capacity, anti-inflammatory properties, and neurological, liver and respiratory disorders. Thanks to all these activities, curcumin is positioned as an interesting nutraceutical. This is the reason why it has been subjected to several modifications in its structure and administration form that have permitted an increase in bioavailability and effectiveness against different diseases, decreasing the mortality and morbidity associated to these pathologies.
Collapse
Affiliation(s)
- Mario Pulido-Moran
- Departamento de Bioquímica y Biología Molecular II, Facultad de Farmacia, Campus Universitario de Cartuja, Universidad de Granada, 18071 Granada, Spain.
- Instituto de Nutrición y Tecnología de los Alimentos José Mataix Verdú, Centro de Investigaciones Biomédicas, Avenida del Conocimiento s/n, Campus Tecnológico y Ciencias de la Salud, Universidad de Granada, Armilla (Granada) 18016, Spain.
| | - Jorge Moreno-Fernandez
- Instituto de Nutrición y Tecnología de los Alimentos José Mataix Verdú, Centro de Investigaciones Biomédicas, Avenida del Conocimiento s/n, Campus Tecnológico y Ciencias de la Salud, Universidad de Granada, Armilla (Granada) 18016, Spain.
- Departamento de Fisiología, Facultad de Farmacia, Campus Universitario de Cartuja, Universidad de Granada, 18071 Granada, Spain.
| | | | - Mcarmen Ramirez-Tortosa
- Departamento de Bioquímica y Biología Molecular II, Facultad de Farmacia, Campus Universitario de Cartuja, Universidad de Granada, 18071 Granada, Spain.
- Instituto de Nutrición y Tecnología de los Alimentos José Mataix Verdú, Centro de Investigaciones Biomédicas, Avenida del Conocimiento s/n, Campus Tecnológico y Ciencias de la Salud, Universidad de Granada, Armilla (Granada) 18016, Spain.
| |
Collapse
|
120
|
Xia L, Xie H, Yu Y, Zhou H, Wang T, Yan J. The Effects of NF-κB and c-Jun/AP-1 on the Expression of Prothrombotic and Proinflammatory Molecules Induced by Anti-β2GPI in Mouse. PLoS One 2016; 11:e0147958. [PMID: 26829121 PMCID: PMC4735462 DOI: 10.1371/journal.pone.0147958] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 01/10/2016] [Indexed: 01/07/2023] Open
Abstract
Our previous data demonstrated that nuclear factor-κB (NF-κB) and activator protein-1 (AP-1) are involved in the process of anti-β2GPI/β2GPI-induced tissue factor (TF) expression in monocytes. However, the role of NF-κB and AP-1 in pathogenic mechanisms of antiphospholipid syndrome (APS) in vivo has been rarely studied. This study aimed to investigate whether NF-κB and c-Jun/AP-1 are involved in anti-β2GPI-induced expression of prothrombotic and proinflammatory molecules in mouse. IgG-APS or anti-β2GPI antibodies were injected into BALB/c mice in the presence or absence of PDTC (a specific inhibitor of NF-κB) and Curcumin (a potent inhibitor of AP-1) treatment. Our data showed that both IgG-APS and anti-β2GPI could induce the activation of NF-κB and c-Jun/AP-1 in mouse peritoneal macrophages. The anti-β2GPI-induced TF activity in homogenates of carotid arteries and peritoneal macrophages from mice could significantly decrease after PDTC and/or Curcumin treatment, in which PDTC showed the strongest inhibitory effect, but combination of two inhibitors had no synergistic effect. Furthermore, anti-β2GPI-induced expression of TF, VCAM-1, ICAM-1 and E-selectin in the aorta and expression of TF, IL-1β, IL-6 and TNF-α in peritoneal macrophages of mice were also significantly attenuated by PDTC and/or Curcumin treatment. These results indicate that both NF-κB and c-Jun/AP-1 are involved in regulating anti-β2GPI-induced expression of prothrombotic and proinflammatory molecules in vivo. Inhibition of NF-κB and c-Jun/AP-1 pathways may be beneficial for the prevention and treatment of thrombosis and inflammation in patients with APS.
Collapse
Affiliation(s)
- Longfei Xia
- Jiangsu Key Laboratory of Medicine Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Hongxiang Xie
- Jiangsu Key Laboratory of Medicine Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Yinjing Yu
- Jiangsu Key Laboratory of Medicine Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Hong Zhou
- Jiangsu Key Laboratory of Medicine Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
- Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province, China
- * E-mail: (HZ); (JY)
| | - Ting Wang
- Jiangsu Key Laboratory of Medicine Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Jinchuan Yan
- Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province, China
- * E-mail: (HZ); (JY)
| |
Collapse
|
121
|
Guo S, Long M, Li X, Zhu S, Zhang M, Yang Z. Curcumin activates autophagy and attenuates oxidative damage in EA.hy926 cells via the Akt/mTOR pathway. Mol Med Rep 2016; 13:2187-93. [PMID: 26781771 DOI: 10.3892/mmr.2016.4796] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 11/05/2015] [Indexed: 11/05/2022] Open
Abstract
Curcumin, which is the effective component of turmeric (Curcuma longa), has previously been shown to exert potent antioxidant, antitumor and anti‑inflammatory activities in vitro and in vivo. However, the mechanism underlying the protective effects of curcumin against oxidative damage in endothelial cells remains unclear. The present study aimed to examine the effects of curcumin on hydrogen peroxide (H2O2)‑induced apoptosis and autophagy in EA.hy926 cells, and to determine the underlying molecular mechanism. Cultured EA.hy926 cells were treated with curcumin (5‑20 µmol/l) 4 h prior to and for 4 h during exposure to H2O2 (200 µmol/l). Oxidative stress resulted in a significant increase in the rate of cell apoptosis, which was accompanied by an increase in the expression levels of caspase‑3 and B‑cell lymphoma 2 (Bcl‑2)‑associated X protein (Bax), and a decrease in the expression levels of Bcl‑2. Treatment with curcumin (5 or 20 µmol/l) significantly inhibited apoptosis, and reversed the alterations in caspase‑3, Bcl‑2 and Bax expression. Furthermore, curcumin induced autophagy and microtubule‑associated protein 1A/1B‑light chain 3‑Ⅱ expression, and suppressed the phosphorylation of Akt and mammalian target of rapamycin (mTOR). These results indicated that curcumin may protect cells against oxidative stress‑induced damage through inhibiting apoptosis and inducing autophagy via the Akt/mTOR pathway.
Collapse
Affiliation(s)
- Shouyu Guo
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Mingzhi Long
- Department of Cardiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Xiuzhen Li
- Department of Cardiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Shushu Zhu
- Department of Cardiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Min Zhang
- Department of Cardiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Zhijian Yang
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| |
Collapse
|
122
|
Ko W, Sohn JH, Jang JH, Ahn JS, Kang DG, Lee HS, Kim JS, Kim YC, Oh H. Inhibitory effects of alternaramide on inflammatory mediator expression through TLR4-MyD88-mediated inhibition of NF-кB and MAPK pathway signaling in lipopolysaccharide-stimulated RAW264.7 and BV2 cells. Chem Biol Interact 2016; 244:16-26. [DOI: 10.1016/j.cbi.2015.11.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Revised: 11/11/2015] [Accepted: 11/20/2015] [Indexed: 01/06/2023]
|
123
|
Panahi Y, Hosseini MS, Khalili N, Naimi E, Majeed M, Sahebkar A. Antioxidant and anti-inflammatory effects of curcuminoid-piperine combination in subjects with metabolic syndrome: A randomized controlled trial and an updated meta-analysis. Clin Nutr 2015; 34:1101-8. [DOI: 10.1016/j.clnu.2014.12.019] [Citation(s) in RCA: 220] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 12/12/2014] [Accepted: 12/29/2014] [Indexed: 12/21/2022]
|
124
|
Cheng R, Choudhury D, Liu C, Billet S, Hu T, Bhowmick NA. Gingival fibroblasts resist apoptosis in response to oxidative stress in a model of periodontal diseases. Cell Death Discov 2015; 1:15046. [PMID: 27551475 PMCID: PMC4979524 DOI: 10.1038/cddiscovery.2015.46] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 09/03/2015] [Accepted: 09/17/2015] [Indexed: 02/05/2023] Open
Abstract
Periodontal diseases are classified as inflammation affecting the supporting tissue of teeth, which eventually leads to tooth loss. Mild reversible gingivitis and severe irreversible periodontitis are the most common periodontal diseases. Periodontal pathogens initiate the diseases. The bacterial toxin, lipopolysaccharide (LPS), triggers the inflammatory response and leads to oxidative stress. However, the progress of oxidative stress in periodontal diseases is unknown. The purpose of this study is to examine oxidative stress and cell damage in gingivitis and periodontitis. Our results showed that LPS increases reactive oxygen species (ROS) accumulation in gingival fibroblast (GF). However, oxidative stress resulting from excessive ROS did not influence DNA damage and cell apoptosis within 24 h. The mechanism may be related to the increased expression of DNA repair genes, Ogg1, Neil1 and Rad50. Detection of apoptosis-related proteins also showed anti-apoptotic effects and pro-apoptotic effects were balanced. The earliest damage appeared in DNA when increased γH2AX, an early biomarker for DNA damage, was detected in the LPS group after 48 h. Later, when recurrent inflammation persisted, 8-OHdG, a biomarker for oxidative stress was much higher in periodontitis model compared to the control in vivo. Staining of 8-OHdG in human periodontitis specimens confirmed the results. Furthermore, TUNEL staining of apoptotic cells indicated that the periodontitis model induced more cell apoptosis in gingival tissue. This suggested GF could resist early and acute inflammation (gingivitis), which was regarded as reversible, but recurrent and chronic inflammation (periodontitis) led to permanent cell damage and death.
Collapse
Affiliation(s)
- R Cheng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - D Choudhury
- Cedars-Sinai Medical Center , Los Angeles, CA, USA
| | - C Liu
- Cedars-Sinai Medical Center, Los Angeles, CA, USA; Affiliated Hospital of Stomatology, Zhejiang University, Hangzhou, China
| | - S Billet
- Cedars-Sinai Medical Center , Los Angeles, CA, USA
| | - T Hu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu, China
| | - N A Bhowmick
- Cedars-Sinai Medical Center , Los Angeles, CA, USA
| |
Collapse
|
125
|
Chen D, Tao X, Wang Y, Tian F, Wei Y, Chen G, Shen H, Wang Z, Yu Z, Li H, Chen G. Curcumin accelerates reendothelialization and ameliorates intimal hyperplasia in balloon-injured rat carotid artery via the upregulation of endothelial cell autophagy. Int J Mol Med 2015; 36:1563-71. [PMID: 26459716 PMCID: PMC4678154 DOI: 10.3892/ijmm.2015.2365] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Accepted: 10/06/2015] [Indexed: 11/30/2022] Open
Abstract
Delayed reendothelialization and intimal hyperplasia (IH) contribute to the failure of vascular interventions. Curcumin (Cur) has been used for various types of diseases with antioxidant, antiproliferative and anti-inflammatory effects. However, investigations involving the application of Cur in inhibiting IH are limited. The aim of the present study was to evaluate the potential therapeutic effects of Cur and its underlying mechanisms on a rat model of carotid artery (CA) intimal injury. In vitro, an endothelial cell (EC) migration assay was conducted using cultured primary human umbilical vein endothelial cells (HUVECs) that were exposed to Cur. In vivo, CA angioplasty injury was used to generate a rat model of intimal injury. CAs were collected at 3 days, and 1 and 4 weeks after injury, respectively, for western blot analysis and double-immunofluorescence analyses, terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling staining, oxidative stress indicator analysis and hematoxylin and eosin staining of the neointima. In vivo, Cur significantly enhanced the migration and healing of HUVECs and simultaneously promoted microtubule-associated protein light chain 3-II (LC3-II) expression when HUVECs were subjected to an artificial scratch. In vitro, endangium from the Cur-treated rats exhibited a significantly reduced number of apoptotic ECs and oxidative stress level compared to that of the sham group. In addition, Cur treatment markedly improved quantification of the LC3-II concomitant with the downregulation of p62 in the injured CA. At 1 week following injury, sizable neointimal lesions had developed, although prominent intima thickening was not observed. At 4 weeks, apparent hemadostenosis occurred resulting from the exorbitance IH. Cur treatment markedly reduced the thickness of the neointimal lesion. It is noteworthy that high-dose Cur may have exerted more significant effects than low-dose Cur. Cur can potentially become a therapeutic drug for angiostenosis by imparting a protective effect that accelerates reendothelialization and ameliorates IH and was mediated by its pro-autophagic effect.
Collapse
Affiliation(s)
- Dongdong Chen
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Xiaoyang Tao
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Yang Wang
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Fengxuan Tian
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Yongxin Wei
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Guilin Chen
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Haitao Shen
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Zhong Wang
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Zhengquan Yu
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Haiying Li
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Gang Chen
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| |
Collapse
|
126
|
Rojewska E, Popiolek-Barczyk K, Kolosowska N, Piotrowska A, Zychowska M, Makuch W, Przewlocka B, Mika J. PD98059 Influences Immune Factors and Enhances Opioid Analgesia in Model of Neuropathy. PLoS One 2015; 10:e0138583. [PMID: 26426693 PMCID: PMC4591269 DOI: 10.1371/journal.pone.0138583] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 09/01/2015] [Indexed: 12/30/2022] Open
Abstract
Neuropathic pain treatment remains challenging due to ineffective therapy and resistance to opioid analgesia. Mitogen-activated protein kinase kinase (MAPKK) have been identified as the crucial regulators of pro- and antinociceptive factors. We used PD98059, an inhibitor of the MAPKK family members MEK1/2. The aim of study was to examine the influence of single and/or repeated PD98059 on nociception and opioid effectiveness in neuropathy. Moreover, we examined how PD98059 influences selected members of cellular pathways and cytokines. The PD98059 (2.5 mcg) was intrathecally preemptively administered before chronic constriction injury (CCI), and then once daily for 7 days. Additionally, at day 7 after CCI the PD98059-treated rats received a single injection of opioids. Using Western blot and qRT-PCR techniques in PD98059-treated rats we analyzed the mRNA and/or protein level of p38, ERK1/2, JNK, NF-kappaB, IL-1beta, IL-6, iNOS and IL-10 in the lumbar spinal cord. Our results indicate that PD98059 has an analgesic effects and potentiates morphine and/or buprenorphine analgesia. Parallel we observed that PD98059 inhibit upregulation of the CCI-elevated p38, ERK1/2, JNK and NF-kappaB protein levels. Moreover, PD98059 also prevented increase of pro- (IL-1beta, IL-6, and iNOS) but enhances anti-nociceptive (IL-10) factors. Summing up, PD98059 diminished pain and increased the effectiveness of opioids in neuropathy. The inhibition of MEKs might inactivate a variety of cell signaling pathways that are implicated in nociception.
Collapse
Affiliation(s)
- Ewelina Rojewska
- Department of Pain Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | | | - Natalia Kolosowska
- Department of Pain Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | - Anna Piotrowska
- Department of Pain Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | - Magdalena Zychowska
- Department of Pain Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | - Wioletta Makuch
- Department of Pain Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | - Barbara Przewlocka
- Department of Pain Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | - Joanna Mika
- Department of Pain Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
- * E-mail:
| |
Collapse
|
127
|
Gong Z, Zhou J, Li H, Gao Y, Xu C, Zhao S, Chen Y, Cai W, Wu J. Curcumin suppresses NLRP3 inflammasome activation and protects against LPS-induced septic shock. Mol Nutr Food Res 2015; 59:2132-42. [PMID: 26250869 DOI: 10.1002/mnfr.201500316] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 07/09/2015] [Accepted: 07/24/2015] [Indexed: 01/13/2023]
Abstract
SCOPE The NLRP3 inflammasome responds to various pathogen-derived factors and danger-associated molecules, mediating IL-1β maturation, therefore is involved in multiple inflammatory diseases. Curcumin has been shown to possess strong anti-inflammatory activity, but the underlying mechanism is not fully understood. Here, we sought to investigate the role and mechanism of curcumin on the inhibition of mature IL-1β production via the regulation of NLRP3 inflammasome. METHODS AND RESULTS Curcumin dramatically inhibited the production of mature IL-1β in LPS-primed macrophages triggered by multiple NLRP3 inflammasome activators, and also reduced the level of cleaved caspase-1 as measured by western blot and ELISA. Curcumin prevented K(+) efflux, the common trigger for NLRP3 inflammasome activation, and attenuated lysosomes disruption and intracellular ROS formation as well. The inhibition of NLRP3 inflammasome by curcumin was in part mediated via the suppression of extracellular regulated protein kinases phosphorylation. Furthermore, administration of curcumin significantly reduced peritoneal IL-1β and HMGB-1 concentration induced by LPS and improved the survival of mice suffering from lethal endotoxic shock. CONCLUSION Curcumin potently inhibits the activation of NLRP3 inflammasome which may contribute to its anti-inflammatory activity. Our finding offers a mechanistic basis for the therapeutic potential of curcumin in septic shock and other NLRP3 inflammasome-driven diseases.
Collapse
Affiliation(s)
- Zizhen Gong
- Department of pediatric Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China.,Shanghai Institute for Pediatric Research, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China.,Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, P. R. China
| | - Jiefei Zhou
- Department of pediatric Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China.,Shanghai Institute for Pediatric Research, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China.,Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, P. R. China
| | - Hui Li
- Department of Pathology, Shanghai institute of Health Science, Shanghai, P. R. China
| | - Yanhong Gao
- Department of Geriatrics, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China
| | - Congfeng Xu
- Shanghai Institute of Immunology, Institutes of Medical Sciences, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China
| | - Shengnan Zhao
- Department of pediatric Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China.,Shanghai Institute for Pediatric Research, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China.,Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, P. R. China
| | - Yingwei Chen
- Shanghai Institute for Pediatric Research, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China.,Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, P. R. China
| | - Wei Cai
- Department of pediatric Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China.,Shanghai Institute for Pediatric Research, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China.,Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, P. R. China
| | - Jin Wu
- Department of pediatric Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China.,Shanghai Institute for Pediatric Research, Shanghai Jiaotong University School of Medicine, Shanghai, P. R. China.,Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, P. R. China
| |
Collapse
|
128
|
Paeng SH, Park WS, Jung WK, Lee DS, Kim GY, Choi YH, Seo SK, Jang WH, Choi JS, Lee YM, Park S, Choi IW. YCG063 inhibits Pseudomonas aeruginosa LPS-induced inflammation in human retinal pigment epithelial cells through the TLR2-mediated AKT/NF-κB pathway and ROS-independent pathways. Int J Mol Med 2015; 36:808-16. [PMID: 26136104 DOI: 10.3892/ijmm.2015.2266] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 06/22/2015] [Indexed: 11/06/2022] Open
Abstract
YCG063 is known as an inhibitor of reactive oxygen species (ROS); however, its intracellular mechanisms of action remain poorly understood. In the present study, we investigated the effects of YCG063 on the inflammatory response of Pseudomonas aeruginosa lipopolysaccharide (PA-LPS)‑stimulated human retinal pigment epithelial cells (RPE cells). Human adult RPE cells (ARPE‑19) were stimulated with PA-LPS. We then investigated the LPS-induced expression of several inflammatory mediators, such as interleukin (IL)-6, IL-8, monocyte chemoattractant protein-1 (MCP-1) and intracellular adhesion molecule-1 (ICAM-1) in the ARPE-19 cells. We performed an enzyme-linked immunosorbent assay (ELISA), western blot analysis, electrophoretic mobility shift assay (EMSA) and fluorescence-activated cell sorting (FACS) to elucidate the mechanisms involved in the anti-inflammatory effects of YCG063 in the PA-LPS-stimulated cells. The results revealed that treatment with YCG063 significantly inhibited the levels of IL-6, IL-8, MCP-1 and ICAM-1 in the PA-LPS-stimulated ARPE-19 cells. YCG063 also markedly inhibited the phosphorylation of AKT in the PA‑LPS-stimulated cells. In addition, the activation of nuclear factor-κB (NF-κB) was also attenuated folllowing treatment with YCG063. ROS were not generated in the PA-LPS-stimulated cells. In conclusion, our data indicate that YCG063 may prove to be a potential protective agent against inflammation, possibly through the downregulation of Toll‑like receptor 2 (TLR2) and the AKT-dependent NF-κB activation pathway in PA-LPS-stimulated ARPE-19 cells. Furthermore, this anti-inflammatory activity occurred through ROS-independent signaling pathways.
Collapse
Affiliation(s)
- Sung Hwa Paeng
- Department of Neurosurgery, Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - Won Sun Park
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon, Gangwon, Republic of Korea
| | - Won-Kyo Jung
- Department of Biomedical Engineering, and Center for Marine-Integrated Biomedical Technology (BK21 Plus), Pukyong National University, Busan, Republic of Korea
| | - Dae-Sung Lee
- Marine Biodiversity Institute of Korea, Seocheon, Chungcheongnam-do, Republic of Korea
| | - Gi-Young Kim
- Laboratory of Immunobiology, Department of Marine Life Sciences, Jeju National University, Jeju, Republic of Korea
| | - Yung Hyun Choi
- Department of Biochemistry, College of Oriental Medicine, Dongeui University, Busan, Republic of Korea
| | - Su-Kil Seo
- Department of Microbiology, Inje University College of Medicine, Busan, Republic of Korea
| | - Won Hee Jang
- Department of Biochemistry, Inje University College of Medicine, Busan, Republic of Korea
| | - Jung Sik Choi
- Department of Internal Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - Young-Min Lee
- Department of Internal Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - Saegwang Park
- Department of Microbiology, Inje University College of Medicine, Busan, Republic of Korea
| | - Il-Whan Choi
- Department of Microbiology, Inje University College of Medicine, Busan, Republic of Korea
| |
Collapse
|
129
|
He Y, Yue Y, Zheng X, Zhang K, Chen S, Du Z. Curcumin, inflammation, and chronic diseases: how are they linked? Molecules 2015; 20:9183-213. [PMID: 26007179 PMCID: PMC6272784 DOI: 10.3390/molecules20059183] [Citation(s) in RCA: 324] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 05/11/2015] [Accepted: 05/14/2015] [Indexed: 02/06/2023] Open
Abstract
It is extensively verified that continued oxidative stress and oxidative damage may lead to chronic inflammation, which in turn can mediate most chronic diseases including cancer, diabetes, cardiovascular, neurological, inflammatory bowel disease and pulmonary diseases. Curcumin, a yellow coloring agent extracted from turmeric, shows strong anti-oxidative and anti-inflammatory activities when used as a remedy for the prevention and treatment of chronic diseases. How oxidative stress activates inflammatory pathways leading to the progression of chronic diseases is the focus of this review. Thus, research to date suggests that chronic inflammation, oxidative stress, and most chronic diseases are closely linked, and the antioxidant properties of curcumin can play a key role in the prevention and treatment of chronic inflammation diseases.
Collapse
Affiliation(s)
- Yan He
- Institute of Natural Medicine & Green Chemistry, School of Chemical Engineering and Light Industry, Guandong University of Technology, 232 Wai Huan West Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, China.
| | - Yuan Yue
- Institute of Natural Medicine & Green Chemistry, School of Chemical Engineering and Light Industry, Guandong University of Technology, 232 Wai Huan West Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, China.
| | - Xi Zheng
- Institute of Natural Medicine & Green Chemistry, School of Chemical Engineering and Light Industry, Guandong University of Technology, 232 Wai Huan West Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, China.
- Susan Lehman Cullman Laboratory for Cancer Research, Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA.
| | - Kun Zhang
- Institute of Natural Medicine & Green Chemistry, School of Chemical Engineering and Light Industry, Guandong University of Technology, 232 Wai Huan West Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, China.
| | - Shaohua Chen
- Department of Otorhinolaryngology, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou 510030, China.
| | - Zhiyun Du
- Institute of Natural Medicine & Green Chemistry, School of Chemical Engineering and Light Industry, Guandong University of Technology, 232 Wai Huan West Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, China.
| |
Collapse
|
130
|
Yang G, Zhou X, Chen T, Deng Y, Yu D, Pan S, Song Y. Hydroxysafflor yellow A inhibits lipopolysaccharide-induced proliferation and migration of vascular smooth muscle cells via Toll-like receptor-4 pathway. Int J Clin Exp Med 2015; 8:5295-5302. [PMID: 26131104 PMCID: PMC4483943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Accepted: 03/25/2015] [Indexed: 06/04/2023]
Abstract
Abnormal proliferation and migration of vascular smooth muscle cells (VSMCs) is closely associated with early vascular hyperplasic lesions. Toll-like receptor (TLR)-4 is a pathogen pattern recognition receptor expressed on VSMCs, and can be activated by lipopolysaccharide. Activated TLR-4 plays a promoting role in VSMCs proliferation and migration through the downstream signaling pathways including Rac1/Akt. Hydroxysafflor yellow A (HSYA) is the main component of the safflower yellow pigments, which has long been used for the treatment of cardiovascular diseases in traditional Chinese medicine. However, the effect of HSYA on VSMC proliferation and migration remains unknown. In the present study, we showed that HYSA could inhibit LPS-induced VSMCs proliferation and migration, accompanied by the downregulated levels of several key pro-inflammatory cytokines, including TNF-α, IL-6, and IL-8. We further showed that HYSA inhibited LPS-induced upregulation of TLR-4 expression as well as the activation of Rac1/Akt pathway, suggesting that HSYA inhibits LPS-induced VSMCs proliferation and migration, partly at least, via inhibition of TLR-4/Rac1/Akt pathway. Accordingly, HSYA may be used as a promising agent for prevention and treatment of vascular hyperplasic disorders.
Collapse
Affiliation(s)
- Guoshuai Yang
- Department of Neurology, Affiliated Haikou Hospital, Xiangya School of Medicine, Central South University (Haikou Municipal People’s Hospital)Haikou 570208, Hainan Province, China
| | - Xiaoyan Zhou
- Department of Hemodialysis, Affiliated Haikou Hospital, Xiangya School of Medicine, Central South University (Haikou Municipal People’s Hospital)Haikou 570208, Hainan Province, China
| | - Tao Chen
- Department of Neurology, The People’s Hospital of Hainan ProvinceHaikou 570311, Hainan Province, China
| | - Yidong Deng
- Department of Neurology, The People’s Hospital of Hainan ProvinceHaikou 570311, Hainan Province, China
| | - Dan Yu
- Department of Neurology, Affiliated Haikou Hospital, Xiangya School of Medicine, Central South University (Haikou Municipal People’s Hospital)Haikou 570208, Hainan Province, China
| | - Suyue Pan
- Department of Neurology, Nanfang Hospital, Southern Medical UniversityGuangzhou 510515, Guangdong Province, China
| | - Yanmin Song
- Department of Neurology, Xiangya Hospital, Central South UniversityChangsha 410008, Hunan Province, China
| |
Collapse
|
131
|
A newly designed curcumin analog Y20 mitigates cardiac injury via anti-inflammatory and anti-oxidant actions in obese rats. PLoS One 2015; 10:e0120215. [PMID: 25786209 PMCID: PMC4364772 DOI: 10.1371/journal.pone.0120215] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Accepted: 01/20/2015] [Indexed: 12/23/2022] Open
Abstract
Obesity is strongly associated with the cause of structural and functional changes of the heart in both human and animal models. Oxidative stress and inflammation play a critical role in the development of obesity-induced cardiac disorders. Curcumin is a natural product from Curcuma Longa with multiple bioactivities. In our previous study, in order to reach better anti-inflammatory and anti-oxidant dual activities, we designed a new mono-carbonyl curcumin analog, Y20, via the structural modification with both trifluoromethyl and bromine. This study was designed to investigate the protective effects of Y20 on obesity-induced cardiac injury and its underlying mechanisms. In high fat diet–fed rats, oral administration of Y20 at 20 mg/kg or curcumin at 50 mg/kg significantly decreased the cardiac inflammation and oxidative stress and eventually improved the cardiac remodeling by mitigating cardiac disorganization, hypertrophy, fibrosis and apoptosis. Y20 at 20 mg/kg showed comparable and even stronger bioactivities than curcumin at 50 mg/kg. The beneficial actions of Y20 are closely associated with its ability to increase Nrf2 expression and inhibit NF-κB activation. Taken together, these results suggest that Y20 may have a great therapeutic potential in the treatment of obesity-induced cardiac injury using Nrf2 and NF-κB as the therapeutic targets for treating obesity-related disorders.
Collapse
|
132
|
Wen Y, Zhang X, Dong L, Zhao J, Zhang C, Zhu C. Acetylbritannilactone Modulates MicroRNA-155-Mediated Inflammatory Response in Ischemic Cerebral Tissues. Mol Med 2015; 21:197-209. [PMID: 25811992 DOI: 10.2119/molmed.2014.00199] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Accepted: 03/17/2015] [Indexed: 12/19/2022] Open
Abstract
Inflammatory responses play a critical role in ischemic brain injury. MicroRNA-155 (miR-155) induces the expression of inflammatory cytokines, and acetylbritannilactone (ABL) exerts potent antiinflammatory actions by inhibiting expression of inflammation-related genes. However, the functions of miR-155 and the actual relationship between ABL and miR-155 in ischemia-induced cerebral inflammation remain unclear. In this study, cerebral ischemia of wild-type (WT) and miR-155(-/-) mice was induced by permanent middle cerebral artery occlusion (MCAO). pAd-miR-155 was injected into the lateral cerebral ventricle 24 h before MCAO to induce miR-155 overexpression. MCAO mice and oxygen-glucose deprivation (OGD)-treated BV2 cells were used to examine the effects of ABL and miR-155 overexpression or deletion on the expression of proinflammatory cytokines. We demonstrated that ABL treatment significantly reduced neurological deficits and cerebral infarct volume by inhibiting tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) expression in ischemic cerebral tissue and OGD-treated BV2 cells. Mechanistic studies suggested that the observed decrease in TNF-α and IL-1β expression was attributable to the ABL-induced suppression of the expression of nuclear factor-kappa B (NF-κB) and Toll-like receptor 4 (TLR4). We further found that miR-155 promoted TNF-α and IL-1β expression by upregulating TLR4 and downregulating the expression of suppressor of cytokine signaling 1 (SOCS1) and myeloid differentiation primary response gene 88 (MyD88), while ABL exerted an inhibitory effect on miR-155-mediated gene expression. In conclusion, miR-155 mediates inflammatory responses in ischemic cerebral tissue by modulating TLR4/MyD88 and SOCS1 expression, and ABL exerts its antiinflammatory action by suppressing miR-155 expression, suggesting a novel miR-155-based therapy for ischemic stroke.
Collapse
Affiliation(s)
- Ya Wen
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, PR China.,Hebei Key Laboratory for Neurology, Shijiazhuang, Hebei, PR China.,Hebei Collaborative Innovation Center for Cardio-cerebrovascular Disease, Shijiazhuang, Hebei, PR China
| | - Xiangjian Zhang
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, PR China.,Hebei Key Laboratory for Neurology, Shijiazhuang, Hebei, PR China.,Hebei Collaborative Innovation Center for Cardio-cerebrovascular Disease, Shijiazhuang, Hebei, PR China
| | - Lipeng Dong
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, PR China.,Hebei Key Laboratory for Neurology, Shijiazhuang, Hebei, PR China
| | - Jingru Zhao
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, PR China.,Hebei Key Laboratory for Neurology, Shijiazhuang, Hebei, PR China
| | - Cong Zhang
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, PR China.,Hebei Key Laboratory for Neurology, Shijiazhuang, Hebei, PR China
| | - Chunhua Zhu
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, PR China.,Hebei Key Laboratory for Neurology, Shijiazhuang, Hebei, PR China.,Hebei Collaborative Innovation Center for Cardio-cerebrovascular Disease, Shijiazhuang, Hebei, PR China
| |
Collapse
|
133
|
Abstract
This study aimed to investigate the effects of curcumin on macrophages polarization and possible mechanism involved, and to analyze the molecular basis of its antiatherosclerosis activity. RAW264.7 macrophages (M0) and M1 macrophages were treated with curcumin at 0, 6.25, 12.5, and 25 μmol/L with or without GW9662. Using real-time polymerase chain reaction and Western blot analysis, we examined the phenotype markers of M1 [iNOS, interleukin (IL)-1β, IL-6, and MCP-1] and M2 (KLF4, FIZZ1, and MGL1] macrophages. Curcumin reduced the expression of the M1 phenotype markers and upregulated the expression of proliferator-activated receptor γ in M0 and M1 macrophages and IKBα in M1 macrophages. When M1 macrophages were incubated with curcumin and GW9662, the expression of the M1 phenotype markers was decreased, while IKBα was upregulated. The expression of the M2 phenotype markers in M0 and M1 macrophages was upregulated after the curcumin treatment. When M0 and M1 macrophages were incubated with curcumin and GW9662, the expression of the M2 phenotype markers was reduced. Curcumin inhibited the M1 inflammation phenotype as a result of the direct activation of IKBα and polarized the macrophages to become M2 phenotype through the activation of proliferator-activated receptor γ. These findings provide new clues to develop new drug therapy for atherosclerosis.
Collapse
|
134
|
Augmentation of Cationic Antimicrobial Peptide Production with Histone Deacetylase Inhibitors as a Novel Epigenetic Therapy for Bacterial Infections. Antibiotics (Basel) 2015; 4:44-61. [PMID: 27025614 PMCID: PMC4790325 DOI: 10.3390/antibiotics4010044] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Accepted: 12/23/2014] [Indexed: 01/29/2023] Open
Abstract
The emergence of antibiotic resistance seriously threatens our ability to treat many common and medically important bacterial infections. Novel therapeutics are needed that can be used alone or in conjunction with antibiotics. Cationic antimicrobial peptides (CAMPs) are important effectors of the host innate defense that exhibit broad-spectrum activity against a wide range of microorganisms. CAMPs are carried within phagocytic granules and are constitutively or inducibly expressed by multiple cell types, including epithelial cells. The role of histone modification enzymes, specifically the histone deacetylases (HDAC), in down-regulating the transcription of CAMP-encoding genes is increasingly appreciated as is the capacity of HDAC inhibitors (HDACi) to block the action of HDACs to increase CAMP expression. The use of synthetic and natural HDACi molecules to increase CAMPs on mucosal surfaces, therefore, has potential therapeutic applications. Here, we review host and pathogen regulation of CAMP expression through the induction of HDACs and assess the therapeutic potential of natural and synthetic HDACi based on evidence from tissue culture systems, animal models, and clinical trials.
Collapse
|
135
|
lan N, Luo G, Yang X, Cheng Y, zhang Y, Wang X, Wang X, Xie T, Li G, Liu Z, Zhong N. 25-Hydroxyvitamin D3-deficiency enhances oxidative stress and corticosteroid resistance in severe asthma exacerbation. PLoS One 2014; 9:e111599. [PMID: 25380286 PMCID: PMC4224414 DOI: 10.1371/journal.pone.0111599] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 10/01/2014] [Indexed: 12/18/2022] Open
Abstract
Oxidative stress plays a significant role in exacerbation of asthma. The role of vitamin D in oxidative stress and asthma exacerbation remains unclear. We aimed to determine the relationship between vitamin D status and oxidative stress in asthma exacerbation. Severe asthma exacerbation patients with 25-hydroxyvitamin D3-deficiency (V-D deficiency) or 25-hydroxyvitamin D-sufficiency (V-D sufficiency) were enrolled. Severe asthma exacerbation with V-D-deficiency showed lower forced expiratory volume in one second (FEV1) compared to that with V-D-sufficiency. V-D-deficiency intensified ROS release and DNA damage and increased TNF-α, OGG1 and NFκB expression and NFκB phosphorylation in severe asthma exacerbation. Supplemental vitamin D3 significantly increased the rates of FEV1 change and decreased ROS and DNA damage in V-D-deficiency. Vitamin D3 inhibited LPS-induced ROS and DNA damage and were associated with a decline in TNF-α and NFκB in epithelial cells. H2O2 reduces nuclear translocation of glucocorticoid receptors in airway epithelial cell lines. V-D pretreatment enhanced the dexamethasone-induced nuclear translocation of glucocorticoid receptors in airway epithelial cell lines and monocytes from 25-hydroxyvitamin D3-deficiency asthma patients. These findings indicate that V-D deficiency aggravates oxidative stress and DNA damage, suggesting a possible mechanism for corticosteroid resistance in severe asthma exacerbation.
Collapse
Affiliation(s)
- Nan lan
- Inflammations & Allergic Diseases Research Unit, Affiliated Hospital of Luzhou Medical College, Luzhou, 646000, Sichuan, China
| | - Guangyan Luo
- Hygiene Section, Luzhou Medical College, Luzhou, 646000, Sichuan, China
| | - Xiaoqiong Yang
- Inflammations & Allergic Diseases Research Unit, Affiliated Hospital of Luzhou Medical College, Luzhou, 646000, Sichuan, China
| | - Yuanyuan Cheng
- Inflammations & Allergic Diseases Research Unit, Affiliated Hospital of Luzhou Medical College, Luzhou, 646000, Sichuan, China
| | - Yun zhang
- Inflammations & Allergic Diseases Research Unit, Affiliated Hospital of Luzhou Medical College, Luzhou, 646000, Sichuan, China
| | - Xiaoyun Wang
- Inflammations & Allergic Diseases Research Unit, Affiliated Hospital of Luzhou Medical College, Luzhou, 646000, Sichuan, China
| | - Xing Wang
- Inflammations & Allergic Diseases Research Unit, Affiliated Hospital of Luzhou Medical College, Luzhou, 646000, Sichuan, China
| | - Tao Xie
- Inflammations & Allergic Diseases Research Unit, Affiliated Hospital of Luzhou Medical College, Luzhou, 646000, Sichuan, China
| | - Guoping Li
- Inflammations & Allergic Diseases Research Unit, Affiliated Hospital of Luzhou Medical College, Luzhou, 646000, Sichuan, China
- State Key Laboratory of Respiratory Disease for Allergy at Shengzhen University, School of Medicine, Shenzhen University, Nanhai Ave 3688, Shenzhen, Guangdong, 518060, PR China
- * E-mail: (G. Li); (ZL); (NZ)
| | - Zhigang Liu
- State Key Laboratory of Respiratory Disease for Allergy at Shengzhen University, School of Medicine, Shenzhen University, Nanhai Ave 3688, Shenzhen, Guangdong, 518060, PR China
- * E-mail: (G. Li); (ZL); (NZ)
| | - Nanshan Zhong
- State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangdong, 510120, PR China
- * E-mail: (G. Li); (ZL); (NZ)
| |
Collapse
|
136
|
Young NA, Bruss MS, Gardner M, Willis WL, Mo X, Valiente GR, Cao Y, Liu Z, Jarjour WN, Wu LC. Oral administration of nano-emulsion curcumin in mice suppresses inflammatory-induced NFκB signaling and macrophage migration. PLoS One 2014; 9:e111559. [PMID: 25369140 PMCID: PMC4219720 DOI: 10.1371/journal.pone.0111559] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 10/06/2014] [Indexed: 01/10/2023] Open
Abstract
Despite the widespread use of curcumin for centuries in Eastern medicine as an anti-inflammatory agent, its molecular actions and therapeutic viability have only recently been explored. While curcumin does have potential therapeutic efficacy, both solubility and bioavailability must be improved before it can be more successfully translated to clinical care. We have previously reported a novel formulation of nano-emulsion curcumin (NEC) that achieves significantly greater plasma concentrations in mice after oral administration. Here, we confirm the immunosuppressive effects of NEC in vivo and further examine its molecular mechanisms to better understand therapeutic potential. Using transgenic mice harboring an NFκB-luciferase reporter gene, we demonstrate a novel application of this in vivo inflammatory model to test the efficacy of NEC administration by bioluminescent imaging and show that LPS-induced NFκB activity was suppressed with NEC compared to an equivalent amount of curcumin in aqueous suspension. Administration of NEC by oral gavage resulted in a reduction of blood monocytes, decreased levels of both TLR4 and RAGE expression, and inhibited secretion of MCP-1. Mechanistically, curcumin blocked LPS-induced phosphorylation of the p65 subunit of NFκB and IκBα in murine macrophages. In a mouse model of peritonitis, NEC significantly reduced macrophage recruitment, but not T-cell or B-cell levels. In addition, curcumin treatment of monocyte derived cell lines and primary human macrophages in vitro significantly inhibited cell migration. These data demonstrate that curcumin can suppress inflammation by inhibiting macrophage migration via NFκB and MCP-1 inhibition and establish that NEC is an effective therapeutic formulation to increase the bioavailability of curcumin in order to facilitate this response.
Collapse
Affiliation(s)
- Nicholas A. Young
- Division of Rheumatology and Immunology, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
| | - Michael S. Bruss
- Division of Rheumatology and Immunology, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
| | - Mark Gardner
- Division of Rheumatology and Immunology, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
| | - William L. Willis
- Division of Rheumatology and Immunology, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
| | - Xiaokui Mo
- Center for Biostatistics, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
| | - Giancarlo R. Valiente
- Division of Rheumatology and Immunology, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
| | - Yu Cao
- College of Pharmacy, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
| | - Zhongfa Liu
- College of Pharmacy, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
- Comprehensive Cancer Center, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
| | - Wael N. Jarjour
- Division of Rheumatology and Immunology, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
| | - Lai-Chu Wu
- Division of Rheumatology and Immunology, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, Wexner Medical Center at The Ohio State University, Columbus, Ohio, United States of America
- * E-mail:
| |
Collapse
|
137
|
Meng Z, Yu XH, Chen J, Li L, Li S. Curcumin attenuates cardiac fibrosis in spontaneously hypertensive rats through PPAR-γ activation. Acta Pharmacol Sin 2014; 35:1247-56. [PMID: 25132338 DOI: 10.1038/aps.2014.63] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Accepted: 06/05/2014] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the effects of curcumin (Cur) on cardiac fibrosis in spontaneously hypertensive rats (SHRs) and the mechanisms underlying the anti-fibrotic effect of Cur in rat cardiac fibroblasts (CFs) in vitro. METHODS SHRs were orally treated with Cur (100 mg·kg(-1)·d(-1)) or Cur (100 mg·kg(-1)·d(-1)) plus the PPAR-γ antagonist GW9662 (1 mg·kg(-1)·d(-1)) for 12 weeks. Cultured CFs were treated with angiotensin II (Ang II, 0.1 μmol/L) in vitro. The expression of relevant proteins and mRNAs was analyzed using Western blotting and real-time PCR, respectively. The expression and activity of peroxisome proliferator-activated receptor-γ (PPAR-γ) were detected using Western blotting and a DNA-binding assay, respectively. RESULTS Treatment of SHRs with Cur significantly decreased systolic blood pressure, blood Ang II concentration, heart weight/body weight ratio and left ventricle weight/body weight ratio, with concurrently decreased expression of connective tissue growth factor (CTGF), plasminogen activator inhibitor (PAI)-1, collagen III (Col III) and fibronectin (FN), and increased expression and activity of PPAR-γ in the left ventricle. Co-treatment with GW9662 partially abrogated the anti-fibrotic effects of Cur in SHRs. Pretreatment of CFs with Cur (5, 10, 20 μmol/L) dose-dependently inhibited Ang II-induced expression of CTGF, PAI-1, Col III and FN, and increased the expression and binding activity of PPAR-γ. Pretreatment with GW9662 partially reversed anti-fibrotic effects of Cur in vitro. Furthermore, pretreatment of CFs with Cur inhibited Ang II-induced expression of transforming growth factor-β1 (TGF-β1) and phosphorylation of Smad2/3, which were reversed by GW9662. CONCLUSION Cur attenuates cardiac fibrosis in SHRs and inhibits Ang II-induced production of CTGF, PAI-1 and ECM in CFs in vitro. The crosstalk between PPAR-γ and TGF-β1/Smad2/3 signaling is involved in the anti-fibrotic and anti-proliferative effects of Cur.
Collapse
|
138
|
Curcumin inhibits monocyte chemoattractant protein-1 expression and enhances cholesterol efflux by suppressing the c-Jun N-terminal kinase pathway in macrophage. Inflamm Res 2014; 63:841-50. [DOI: 10.1007/s00011-014-0758-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Revised: 06/09/2014] [Accepted: 07/09/2014] [Indexed: 12/29/2022] Open
|
139
|
Fu Y, Gao R, Cao Y, Guo M, Wei Z, Zhou E, Li Y, Yao M, Yang Z, Zhang N. Curcumin attenuates inflammatory responses by suppressing TLR4-mediated NF-κB signaling pathway in lipopolysaccharide-induced mastitis in mice. Int Immunopharmacol 2014; 20:54-8. [DOI: 10.1016/j.intimp.2014.01.024] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 01/04/2014] [Accepted: 01/24/2014] [Indexed: 10/25/2022]
|
140
|
Chen G, Pan SQ, Shen C, Pan SF, Zhang XM, He QY. Puerarin inhibits angiotensin II-induced cardiac hypertrophy via the redox-sensitive ERK1/2, p38 and NF-κB pathways. Acta Pharmacol Sin 2014; 35:463-75. [PMID: 24608673 DOI: 10.1038/aps.2013.185] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 11/27/2013] [Indexed: 12/28/2022] Open
Abstract
AIM To investigate the effects of puerarin (Pue), an isoflavone derived from Kudzu roots, on angiotensin II (Ang II)-induced hypertrophy of cardiomyocytes in vivo and in vitro. METHODS C57BL/6J mice were infused with Ang II and treated with Pue (100 mg·kg(-1)·d(-1), po) for 15 d. After the treatment, systolic blood pressure (SBP) and left ventricular wall thickness were assessed. The ratios of heart weight to body weight (HW/BW) and left ventricular weight to body weight (LVW/BW) were determined, and heart morphometry was assessed. Expression of fetal-type genes (ANP, BNP and β-MHC) in left ventricles was measured using semi-quantitative RT-PCR. Mouse primary cardiomyocytes were treated with Pue (50, 100, 200 μmol/L), then exposed to Ang II (1 μmol/L). ROS level was examined with flow cytometry, the binding activity of NF-κB was determined using EMSA. Western blot was used to measure the levels of ERK1/2, p38 and NF-κB pathway proteins. [(3)H]leucine incorporation was used to measure the rate of protein synthesis. RESULTS Oral administration of Pue significantly suppressed Ang II-induced increases in the myocyte surface area, HW/BW, LVW/BW, SBP and left ventricular wall thickness. Furthermore, Pue significantly suppressed Ang II-induced increases in ANP, BNP and β-MHC expression in the left ventricles in vivo. Treatment of cardiomyocytes with Pue (50-500 μmol/L) did not affect the viability of cardiomyocytes in vitro. Pretreatment of cardiomyocytes with Pue dose-dependently inhibited Ang II-induced increases in ROS production, NF-κB binding activity, protein synthesis and cell breadth. Furthermore, pretreatment with Pue significantly suppressed Ang II-induced activation of ERK1/2, p38 and the NF-κB pathway proteins and the expression of ANP and β-MHC in cardiomyocytes. The positive drug valsartan exerted similar effects on Ang II-induced cardiac hypertrophy in vivo and in vitro. CONCLUSION Pue attenuates Ang II-induced cardiac hypertrophy by inhibiting activation of the redox-sensitive ERK1/2, p38 and the NF-κB pathways.
Collapse
|
141
|
Zhu HT, Bian C, Yuan JC, Chu WH, Xiang X, Chen F, Wang CS, Feng H, Lin JK. Curcumin attenuates acute inflammatory injury by inhibiting the TLR4/MyD88/NF-κB signaling pathway in experimental traumatic brain injury. J Neuroinflammation 2014; 11:59. [PMID: 24669820 PMCID: PMC3986937 DOI: 10.1186/1742-2094-11-59] [Citation(s) in RCA: 257] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 03/17/2014] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Traumatic brain injury (TBI) initiates a neuroinflammatory cascade that contributes to substantial neuronal damage and behavioral impairment, and Toll-like receptor 4 (TLR4) is an important mediator of thiscascade. In the current study, we tested the hypothesis that curcumin, a phytochemical compound with potent anti-inflammatory properties that is extracted from the rhizome Curcuma longa, alleviates acute inflammatory injury mediated by TLR4 following TBI. METHODS Neurological function, brain water content and cytokine levels were tested in TLR4⁻/⁻ mice subjected to weight-drop contusion injury. Wild-type (WT) mice were injected intraperitoneally with different concentrations of curcumin or vehicle 15 minutes after TBI. At 24 hours post-injury, the activation of microglia/macrophages and TLR4 was detected by immunohistochemistry; neuronal apoptosis was measured by FJB and TUNEL staining; cytokines were assayed by ELISA; and TLR4, MyD88 and NF-κB levels were measured by Western blotting. In vitro, a co-culture system comprised of microglia and neurons was treated with curcumin following lipopolysaccharide (LPS) stimulation. TLR4 expression and morphological activation in microglia and morphological damage to neurons were detected by immunohistochemistry 24 hours post-stimulation. RESULTS The protein expression of TLR4 in pericontusional tissue reached a maximum at 24 hours post-TBI. Compared with WT mice, TLR4⁻/⁻ mice showed attenuated functional impairment, brain edema and cytokine release post-TBI. In addition to improvement in the above aspects, 100 mg/kg curcumin treatment post-TBI significantly reduced the number of TLR4-positive microglia/macrophages as well as inflammatory mediator release and neuronal apoptosis in WT mice. Furthermore, Western blot analysis indicated that the levels of TLR4 and its known downstream effectors (MyD88, and NF-κB) were also decreased after curcumin treatment. Similar outcomes were observed in the microglia and neuron co-culture following treatment with curcumin after LPS stimulation. LPS increased TLR4 immunoreactivity and morphological activation in microglia and increased neuronal apoptosis, whereas curcumin normalized this upregulation. The increased protein levels of TLR4, MyD88 and NF-κB in microglia were attenuated by curcumin treatment. CONCLUSIONS Our results suggest that post-injury, curcumin administration may improve patient outcome by reducing acute activation of microglia/macrophages and neuronal apoptosis through a mechanism involving the TLR4/MyD88/NF-κB signaling pathway in microglia/macrophages in TBI.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | - Jiang-Kai Lin
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, 30 Gaotanyan Street, Chongqing 400038, China.
| |
Collapse
|
142
|
Yang Z, Zhao T, Zou Y, Zhang JH, Feng H. Curcumin inhibits microglia inflammation and confers neuroprotection in intracerebral hemorrhage. Immunol Lett 2014; 160:89-95. [PMID: 24680995 DOI: 10.1016/j.imlet.2014.03.005] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Revised: 02/24/2014] [Accepted: 03/17/2014] [Indexed: 12/24/2022]
Abstract
Much evidence demonstrates that microglia mediated neuroinflammation is an important contributor to the inflammatory injury in intracerebral hemorrhage (ICH). Therefore, the compounds that can inhibit neuroinflammation are greatly needed. In the current study, we examined whether curcumin, present in a Chinese medicinal plant, could prevent ICH induced microglia activation and confer protection against neurotoxicity. The cytokines of microglia were measured by ELISA, p38MAPK/PKC and NF-κB were measured by Western blot and EMSA. Microglial toxicity was assessed using MTT and FACS assays. And neurological function was evaluated by animal behavioristics. We found that curcumin prevented ICH-induced inflammatory molecules through NF-κB activation via the p38MAPK/PKC pathway in vitro. In addition, curcumin protected hippocampal HT22 cells from indirect toxicity mediated by ICH-treated microglia cells. Further, curcumin also attenuated ICH-induced neurological deficit and cerebral water content in vivo. Together, our findings suggest that curcumin could suppress ICH induced inflammatory injury and represent a novel herbal sources for ICH therapeutical strategy.
Collapse
Affiliation(s)
- Zhao Yang
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Tianzhi Zhao
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, Shaanxi Province, China
| | - Yongjie Zou
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - John H Zhang
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Hua Feng
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China.
| |
Collapse
|
143
|
Wei L, Zhang Y, Yang C, Wang Q, Zhuang Z, Sun Z. Neuroprotective effects of ebselen in traumatic brain injury model: involvement of nitric oxide and p38 mitogen-activated protein kinase signalling pathway. Clin Exp Pharmacol Physiol 2014; 41:134-8. [PMID: 24131109 DOI: 10.1111/1440-1681.12186] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2013] [Revised: 10/09/2013] [Accepted: 10/13/2013] [Indexed: 12/15/2022]
Affiliation(s)
- Liang Wei
- Department of Neurosurgery; East Hospital; Tongji University School of Medicine; Shanghai China
| | - Yanfei Zhang
- Department of Neurosurgery; East Hospital; Tongji University School of Medicine; Shanghai China
| | - Cheng Yang
- Department of Neurosurgery; East Hospital; Tongji University School of Medicine; Shanghai China
| | - Qi Wang
- Department of Neurosurgery; East Hospital; Tongji University School of Medicine; Shanghai China
| | - Zhongwei Zhuang
- Department of Neurosurgery; East Hospital; Tongji University School of Medicine; Shanghai China
| | - Zhiyang Sun
- Department of Neurosurgery; East Hospital; Tongji University School of Medicine; Shanghai China
| |
Collapse
|
144
|
Xue J, Zempleni J. Epigenetic synergies between biotin and folate in the regulation of pro-inflammatory cytokines and repeats. Scand J Immunol 2014; 78:419-25. [PMID: 24007195 DOI: 10.1111/sji.12108] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 08/30/2013] [Indexed: 12/29/2022]
Abstract
The protein biotin ligase, holocarboxylase synthetase (HLCS), is a chromatin protein that interacts physically with the DNA methyltransferase DNMT1, the methylated cytosine-binding protein MeCP2 and the histone H3 K9-methyltransferase EHMT1, all of which participate in folate-dependent gene repression. Here we tested the hypothesis that biotin and folate synergize in the repression of pro-inflammatory cytokines and long-terminal repeats (LTRs), mediated by interactions between HLCS and other chromatin proteins. Biotin and folate supplementation could compensate for each other's deficiency in the repression of LTRs in Jurkat and U937 cells. For example, when biotin-deficient Jurkat cells were supplemented with folate, the expression of LTRs decreased by >70%. Epigenetic synergies were more complex in the regulation of cytokines compared with LTRs. For example, the abundance of TNF-α was 100% greater in folate- and biotin-supplemented U937 cells compared with biotin-deficient and folate-supplemented cells. The NF-κB inhibitor curcumin abrogated the effects of folate and biotin in cytokine regulation, suggesting that transcription factor signalling adds an extra layer of complexity to the regulation of cytokine genes by epigenetic phenomena. We conclude that biotin and folate synergize in the repression of LTRs and that these interactions are probably mediated by HLCS-dependent epigenetic mechanisms. In contrast, synergies between biotin and folate in the regulation of cytokines need to be interpreted in the context of transcription factor signalling.
Collapse
Affiliation(s)
- J Xue
- Department of Nutrition and Health Sciences, University of Nebraska at Lincoln, Lincoln, NE, USA
| | | |
Collapse
|
145
|
Phytoagents for cancer management: regulation of nucleic acid oxidation, ROS, and related mechanisms. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:925804. [PMID: 24454991 PMCID: PMC3886269 DOI: 10.1155/2013/925804] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 09/27/2013] [Accepted: 10/05/2013] [Indexed: 12/28/2022]
Abstract
Accumulation of oxidized nucleic acids causes genomic instability leading to senescence, apoptosis, and tumorigenesis. Phytoagents are known to reduce the risk of cancer development; whether such effects are through regulating the extent of nucleic acid oxidation remains unclear. Here, we outlined the role of reactive oxygen species in nucleic acid oxidation as a driving force in cancer progression. The consequential relationship between genome instability and cancer progression highlights the importance of modulation of cellular redox level in cancer management. Current epidemiological and experimental evidence demonstrate the effects and modes of action of phytoagents in nucleic acid oxidation and provide rationales for the use of phytoagents as chemopreventive or therapeutic agents. Vitamins and various phytoagents antagonize carcinogen-triggered oxidative stress by scavenging free radicals and/or activating endogenous defence systems such as Nrf2-regulated antioxidant genes or pathways. Moreover, metal ion chelation by phytoagents helps to attenuate oxidative DNA damage caused by transition metal ions. Besides, the prooxidant effects of some phytoagents pose selective cytotoxicity on cancer cells and shed light on a new strategy of cancer therapy. The “double-edged sword” role of phytoagents as redox regulators in nucleic acid oxidation and their possible roles in cancer prevention or therapy are discussed in this review.
Collapse
|
146
|
Gao X, Zheng F, Guo G, Liu X, Fan R, Qian ZY, Huang N, Wei YQ. Improving the anti-colon cancer activity of curcumin with biodegradable nano-micelles. J Mater Chem B 2013; 1:5778-5790. [PMID: 32261235 DOI: 10.1039/c3tb21091j] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Curcumin (Cur) showed an antitumor effect by anti-angiogenesis and the induction of apoptosis. However, curcumin is limited in clinical applications by its hydrophobicity. Therefore, improving the water-solublilty and antitumor effect of curcumin are very meaningful. In this work, biodegradable monomethoxy poly(ethylene glycol)poly(lactide) copolymer (MPEG-PLA) micelles were employed to deliver curcumin by a self-assembly method. The obtained curcumin loaded polymeric micelles (Cur/MPEG-PLA) with a drug loading of 8% were monodisperse and ∼30 nm in diameter, which could release curcumin in an extended period in vitro and in vivo. In addition, Cur/MPEG-PLA showed a larger effect on cell growth inhibition and the induction of cell apoptosis than free curcumin in vitro. Furthermore, the therapy efficiency of Cur/MPEG-PLA on a colon cancer mouse model was evaluated in detail. Cur/MPEG-PLA could cause a more significant inhibitory effect on colon tumor growth than free curcumin with the same dose (P < 0.05 or P < 0.05, respectively), which indicated that Cur/MPEG-PLA could improve the antitumor effect of curcumin in vivo. Immunohistochemical and immunofluorescent analysis showed that Cur/MPEG-PLA could induce more tumor cell apoptosis, and inhibit more angiogenesis than the free drug group. Besides, Cur/MPEG-PLA exhibited a larger anti-angiogenesis effect in vivo. Finally, the anti-lung metastasis efficiency of Cur/MPEG-PLA on the colon cancer model was evaluated. Cur/MPEG-PLA could cause a more significant inhibitory effect on lung metastasis than free curcumin with the same dose (P < 0.05), which indicates that Cur/MPEG-PLA could improve the anti-lung metastasis effect of curcumin in vivo. Our data suggested Cur/MPEG-PLA may have potential clinical applications in colon cancer therapy.
Collapse
Affiliation(s)
- Xiang Gao
- Department of Pathophysiology, College of Preclinical and Forensic Medical Sciences, Sichuan University, Chengdu, 610041, PR China.
| | | | | | | | | | | | | | | |
Collapse
|