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Tian Y, Liu YF, Wang YY, Li YZ, Ding WY, Zhang C. Molecular mechanisms of PTEN in atherosclerosis: A comprehensive review. Eur J Pharmacol 2024; 979:176857. [PMID: 39094923 DOI: 10.1016/j.ejphar.2024.176857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Revised: 07/17/2024] [Accepted: 07/24/2024] [Indexed: 08/04/2024]
Abstract
Atherosclerosis is a chronic inflammatory disease of the arterial wall caused by an imbalance of lipid metabolism and a maladaptive inflammatory response. A variety of harmful cellular changes associated with atherosclerosis include endothelial dysfunction, the migration of circulating inflammatory cells to the arterial wall, the production of proinflammatory cytokines, lipid buildup in the intima, local inflammatory responses in blood vessels, atherosclerosis-associated apoptosis, and autophagy. PTEN inhibits the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (PKB/AKT)/mammalian target of rapamycin (mTOR) pathway through its lipid phosphatase activity. Previous studies have shown that PTEN is closely related to atherosclerosis. This article reviews the role of PTEN in atherosclerosis from the perspectives of autophagy, apoptosis, inflammation, proliferation, and angiogenesis.
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Affiliation(s)
- Yuan Tian
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan province, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China
| | - Yi-Fan Liu
- Research Laboratory of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China
| | - Yan-Yue Wang
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan province, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China
| | - Yong-Zhen Li
- Department of Pathology, The First People's Hospital of Zigong, Zigong, China, 643099, People's Republic of China
| | - Wen-Yan Ding
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan province, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China
| | - Chi Zhang
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan province, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
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Lee J, Park J, Song KM, Lee YG, Choi HK. Actinidia arguta Extract Containing Myo-Inositol Suppresses TNF- α-Induced VCAM-1 Expression and Monocyte Adhesion to Endothelial Cells via Inhibition of the PTEN/Akt/GSK-3 β and NF- κB Signaling Pathways. J Med Food 2024; 27:419-427. [PMID: 38656897 DOI: 10.1089/jmf.2023.k.0326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024] Open
Abstract
The primary inflammatory process in atherosclerosis, a major contributor to cardiovascular disease, begins with monocyte adhering to vascular endothelial cells. Actinidia arguta (kiwiberry) is an edible fruit that contains various bioactive components. While A. arguta extract (AAE) has been recognized for its anti-inflammatory characteristics, its specific inhibitory effect on early atherogenic events has not been clarified. We used tumor necrosis factor-α (TNF-α)-stimulated human umbilical vein endothelial cells (HUVECs) for an in vitro model. AAE effectively hindered the attachment of THP-1 monocytes and reduced the expression of vascular cell adhesion molecule-1 (VCAM-1) in HUVECs. Transcriptome analysis revealed that AAE treatment upregulated phosphatase and tensin homolog (PTEN), subsequently inhibiting phosphorylation of AKT and glycogen synthase kinase 3β (GSK3β) in HUVECs. AAE further hindered phosphorylation of AKT downstream of the nuclear factor kappa B (NF-κB) signaling pathway, leading to suppression of target gene expression. Oral administration of AAE suppressed TNF-α-stimulated VCAM-1 expression, monocyte-derived macrophage infiltration, and proinflammatory cytokine expression in C57BL/6 mouse aortas. Myo-inositol, identified as the major compound in AAE, played a key role in suppressing THP-1 monocyte adhesion in HUVECs. These findings suggest that AAE could serve as a nutraceutical for preventing atherosclerosis by inhibiting its initial pathogenesis.
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Affiliation(s)
- Jangho Lee
- Divisions of Functional Food Research, Korea Food Research Institute, Wanju-gun, Republic of Korea
| | - Joon Park
- Divisions of Strategic Food Technology Research, Korea Food Research Institute, Wanju-gun, Republic of Korea
| | - Kyung-Mo Song
- Divisions of Strategic Food Technology Research, Korea Food Research Institute, Wanju-gun, Republic of Korea
| | - Yu Geon Lee
- Divisions of Functional Food Research, Korea Food Research Institute, Wanju-gun, Republic of Korea
| | - Hyo-Kyoung Choi
- Divisions of Functional Food Research, Korea Food Research Institute, Wanju-gun, Republic of Korea
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Yao YY, Ling EA, Lu D. Microglia mediated neuroinflammation - signaling regulation and therapeutic considerations with special reference to some natural compounds. Histol Histopathol 2020; 35:1229-1250. [PMID: 32662061 DOI: 10.14670/hh-18-239] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Neuroinflammation plays a central role in multiple neurodegenerative diseases and neurological disorders such as Alzheimer's disease (AD), Parkinson's disease (PD), cerebral ischemic injury etc. In this connection, microglia, the key players in the central nervous system, mediate the inflammatory response process. In brain injuries, activated microglia can clear the cellular debris and invading pathogens and release neurotrophic factors; however, prolonged microglia activation may cause neuronal death through excessive release of inflammatory mediators. Therefore, it is of paramount importance to understand the underlying molecular mechanisms of microglia activation to design an effective therapeutic strategy to alleviate neuronal injury. Recent studies have shown that some natural compounds and herbal extracts possess anti-inflammatory properties that may suppress microglial activation and ameliorate neuroinflammation and hence are neuroprotective. In this review, we will update some of the common signaling pathways that regulate microglia activation. Among the various signaling pathways, the Notch-1, mitogen-activated protein kinases (MAPKs), and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) have been reported to exacerbate microglia mediated neuroinflammation that is implicated in different neuropathological diseases. The search for natural compounds or agents, specifically those derived from natural herbal extracts such as Gastrodin, scutellarin, RG1 etc. has been the focus of many of our recent studies because they have been found to regulate microglia activation. The pharmacological effects of these agents and their potential mechanisms for regulating microglia activation are systematically reviewed here for a fuller understanding of their biochemical action and therapeutic potential for treatment of microglia mediated neuropathological diseases.
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Affiliation(s)
- Yue-Yi Yao
- Technology Transfer Center, Kunming Medical University, Kunming, China
| | - Eng-Ang Ling
- Department of Anatomy, Young Loo Lin School of Medicine, National University of Singapore, Singapore.
| | - Di Lu
- Technology Transfer Center, Kunming Medical University, Kunming, China.
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Hegazy GA, Awan Z, Hashem E, Al-Ama N, Abunaji AB. Levels of soluble cell adhesion molecules in type 2 diabetes mellitus patients with macrovascular complications. J Int Med Res 2019; 48:300060519893858. [PMID: 31885308 PMCID: PMC7607741 DOI: 10.1177/0300060519893858] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Objective Type 2 diabetes mellitus (T2DM) is a main risk factor for development of cardiovascular diseases (CVDs) and endothelial dysfunction. This study aimed to investigate serum levels of soluble vascular cell adhesion molecule 1 (sVCAM-1), intercellular adhesion molecule 1 (sICAM-1), and endothelium selectin (sE-selectin) in T2DM patients with macrovascular complications. Methods A cross-sectional study of 21 controls, 30 T2DM patients without CVDs, and 30 T2DM patients with CVDs was conducted. Serum levels of soluble adhesion molecules including sVCAM-1, sICAM-1, and sE-selectin were determined using ELISA. Results Serum levels of sVCAM-1, sICAM-1, and sE-selectin were higher in T2DM patients than in controls. Levels of serum sVCAM-1 were higher in T2DM patients with CVDs compared with T2DM patients without CVDs. In T2DM patients with CVDs, significant positive associations were observed between sVCAM-1, sICAM-1, and sE-selectin levels (r = 0.575, p = 0.001 and r = 0.378, p = 0.040). Conclusions Circulating levels of soluble adhesion molecules were elevated in T2DM patients, regardless of whether the patients had cardiovascular complications. Only sVCAM-1 was considered a useful marker for the prediction of CVDs in T2DM patients.
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Affiliation(s)
- Gehan A Hegazy
- Clinical Biochemistry Department, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.,Medical Biochemistry Department, National Research Centre, Cairo, Egypt
| | - Zuhier Awan
- Clinical Biochemistry Department, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.,Cardiology Department, Faculty of Medicine, McGill University, Canada
| | - Enayat Hashem
- Clinical Biochemistry Department, Faculty of Medicine, Alexandria University, Egypt
| | - Nabil Al-Ama
- Cardiology Department, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
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Ko YS, Park EJ, Kim YM, Kim HJ, Yun-Choi H, Lee DH, Chang KC. A limited series of synthetic tetrahydroisoquinoline alkaloids reduce inflammatory gene iNOS via inhibition of p-STAT-1 and suppress HMGB1 secretion in LPS-treated mice lung tissue. Int Immunopharmacol 2017; 52:297-304. [DOI: 10.1016/j.intimp.2017.09.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 09/14/2017] [Accepted: 09/25/2017] [Indexed: 10/18/2022]
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Abu El-Asrar AM, Alam K, Siddiquei MM, Van den Eynde K, Mohammad G, De Hertogh G, Opdenakker G. Myeloid-Related Protein-14/MRP-14/S100A9/Calgranulin B is Associated with Inflammation in Proliferative Diabetic Retinopathy. Ocul Immunol Inflamm 2016; 26:615-624. [PMID: 27849448 DOI: 10.1080/09273948.2016.1245759] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
PURPOSE To investigate the expression of the leukocyte proteins myeloid-related protein (MRP)-8 and MRP-14 in proliferative diabetic retinopathy (PDR) and the effect of MRP-8/MRP-14 (calprotectin) heterodimer on induction of proinflammatory factors in human retinal microvascular endothelial cells (HRMEC). METHODS Epiretinal membranes from 20 patients with PDR and 10 patients with proliferative vitreoretinopathy (PVR), vitreous fluid samples from PDR and non-diabetic subjects and HRMEC were studied by immunohistochemistry and Western blot analysis. RESULTS MRP-14 expression was localized in endothelial cells, leukocytes and myofibroblasts in all PDR membranes. MRP-8 expression was limited to intravascular leukocytes in 42% of the studied membranes. In PVR membranes, MRP-14 was expressed in leukocytes and myofibroblasts, whereas MRP-8 immunoreactivity was limited to leukocytes. MRP-14 was significantly upregulated in vitreous from PDR patients. MRP-8/MRP-14 (calprotectin) increased expression of intercellular adhesion molecule-1, but attenuated vascular cell adhesion molecule-1 expression in HRMEC. CONCLUSIONS Increased MRP-14 levels are associated with inflammation in PDR.
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Affiliation(s)
- Ahmed M Abu El-Asrar
- a Department of Ophthalmology , College of Medicine, King Saud University , Riyadh , Saudi Arabia.,b Dr Nasser Al-Rashid Research Chair in Ophthalmology , Riyadh , Saudi Arabia
| | - Kaiser Alam
- a Department of Ophthalmology , College of Medicine, King Saud University , Riyadh , Saudi Arabia
| | - Mohammad M Siddiquei
- a Department of Ophthalmology , College of Medicine, King Saud University , Riyadh , Saudi Arabia
| | - Kathleen Van den Eynde
- c Laboratory of Histochemistry and Cytochemistry, University of Leuven , KU Leuven , Leuven , Belgium
| | - Ghulam Mohammad
- a Department of Ophthalmology , College of Medicine, King Saud University , Riyadh , Saudi Arabia
| | - Gert De Hertogh
- c Laboratory of Histochemistry and Cytochemistry, University of Leuven , KU Leuven , Leuven , Belgium
| | - Ghislain Opdenakker
- d Laboratory of Immunobiology, Rega Institute for Medical Research, Department of Microbiology and Immunology , University of Leuven , KU Leuven , Leuven , Belgium
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Yuan X, Chen J, Dai M. Paeonol promotes microRNA-126 expression to inhibit monocyte adhesion to ox-LDL-injured vascular endothelial cells and block the activation of the PI3K/Akt/NF-κB pathway. Int J Mol Med 2016; 38:1871-1878. [PMID: 27748840 DOI: 10.3892/ijmm.2016.2778] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 10/03/2016] [Indexed: 11/06/2022] Open
Abstract
Paeonol (2'-hydroxy-4'-methoxyacetophenone) is an active component isolated from the root of Paeonia Suffruticosa Andrews. We previously found that paeonol inhibited vascular cell adhesion molecule-1 (VCAM‑1) expression, and thus may be useful for the prevention and treatment of rabbit atherosclerosis (AS); however, the underlying mechanisms are not yet well known. Recently, microRNAs (miRNAs or miRs) have been reported to play an important role in the pathogenesis of AS. In the present study, we examined the effects of paeonol on miRNA-126 (miR‑126) expression, and its ability to inhibit monocyte adhesion to oxidized low-density lipoprotein (ox-LDL)-injured vascular endothelial cells (VECs). VECs were isolated from the rat thoracic aorta and stimulated with ox-LDL (20 mg/l) in the presence of paeonol. We found that miR‑126 had a lower expression in the ox-LDL-injured VECs, and VCAM‑1 was identified as a target gene of miR‑126. Furthermore, paeonol promoted miR‑126 expression and suppressed VCAM‑1 expression at the mRNA and protein level. It also inhibited monocyte adhesion to ox-LDL-injured VECs through the promotion of miR‑126 expression. Furthermore, it was demonstrated that paeonol blocked the activation of the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt)/nuclear factor-κB (NF-κB) signaling pathway by promoting miR-126 expression. Taken together, and to the best of our knowledge, the findings of this study provide the first evidence that paeonol promotes miR‑126 expression to inhibit monocyte adhesion to ox-LDL-injured VECs and block the activation of the PI3K/Akt/NF-κB signaling pathway. Our data suggest that miR‑126 plays a crucial role in vascular inflammation and may be an important therapeutic target in the treatment of AS with the use of paeonol.
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Affiliation(s)
- Xusheng Yuan
- Key Laboratory of Chinese Medicine Research and Development, Department of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui 230038, P.R. China
| | - Junjun Chen
- Key Laboratory of Xin'an Medicine, Department of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui 230038, P.R. China
| | - Min Dai
- Key Laboratory of Chinese Medicine Research and Development, Department of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui 230038, P.R. China
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Chen F, Wang W, Ding H, Yang Q, Dong Q, Cui M. The glucagon-like peptide-1 receptor agonist exendin-4 ameliorates warfarin-associated hemorrhagic transformation after cerebral ischemia. J Neuroinflammation 2016; 13:204. [PMID: 27566245 PMCID: PMC5002167 DOI: 10.1186/s12974-016-0661-0] [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: 12/29/2015] [Accepted: 07/14/2016] [Indexed: 12/25/2022] Open
Abstract
Background As the number of patients with cardioembolic ischemic stroke is predicted to be double by 2030, increased burden of warfarin-associated hemorrhagic transformation (HT) after cerebral ischemia is an expected consequence. However, thus far, no effective treatment strategy is available for HT prevention in routine clinical practice. While the glucagon-like peptide-1 receptor (GLP-1R) agonist exendin-4 (Ex-4) is known to protect against oxidative stress and neuronal cell death caused by ischemic brain damage, its effect on preventing warfarin-associated HT after cerebral ischemia is yet unknown. Therefore, we hypothesized that Ex-4 would stabilize the blood-brain barrier (BBB) and suppress neuroinflammation through PI3K-Akt-induced inhibition of glycogen synthase kinase-3β (GSK-3β) after warfarin-associated HT post-cerebral ischemia. Methods We used male C57BL/6 mice for all experiments. A 5-mg warfarin sodium tablet was dissolved in animals’ drinking water (effective warfarin uptake 0.04 mg (2 mg/kg) per mouse). The mice were fed for 0, 6, 12, and 24 h with ad libitum access to the treated water. To study the effects of Ex-4, temporary middle cerebral artery occlusion (MCAO) was performed. Then, either Ex-4 (10 mg/kg) or saline was injected through the tail vein, and in the Ex-4 + wortmannin group, PI3K inhibitor wortmannin was intravenously injected, after reperfusion. The infarct volume, neurological deficits, and integrity of the BBB were assessed 72 h post MCAO. One- or two-way ANOVA was used to test the difference between means followed by Newman–Keuls post hoc testing for pair-wise comparison. Results We observed that Ex-4 ameliorated warfarin-associated HT and preserved the integrity of the BBB after cerebral ischemia through the PI3K/Akt/GSK-3β pathway. Furthermore, Ex-4 suppressed oxidative DNA damage and lipid peroxidation, attenuated pro-inflammatory cytokine expression levels, and suppressed microglial activation and neutrophil infiltration in warfarin-associated HT post-cerebral ischemia. However, these effects were totally abolished in the mice treated with Ex-4 + the PI3K inhibitor—wortmannin. The PI3K/Akt-GSK-3β signaling pathway appeared to contribute to the protection afforded by Ex-4 in the warfarin-associated HT model. Conclusions GLP-1 administration could reduce warfarin-associated HT in mice. This beneficial effect of GLP-1 is associated with attenuating neuroinflammation and BBB disruption by inactivating GSK-3β through the PI3K/Akt pathway. Electronic supplementary material The online version of this article (doi:10.1186/s12974-016-0661-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Fangzhe Chen
- Department of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology, Fudan University, No. 12 Middle Wulumuqi Road, Shanghai, 200040, China
| | - Weifeng Wang
- The Department of Clinical Laboratory, Central Laboratory, Jing'an District Centre Hospital of Shanghai, Huashan Hospital Fudan University Jing'an Branch, No. 259 Xi Kang Road, Shanghai, 200040, China
| | - Hongyan Ding
- Department of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology, Fudan University, No. 12 Middle Wulumuqi Road, Shanghai, 200040, China
| | - Qi Yang
- Department of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology, Fudan University, No. 12 Middle Wulumuqi Road, Shanghai, 200040, China
| | - Qiang Dong
- Department of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology, Fudan University, No. 12 Middle Wulumuqi Road, Shanghai, 200040, China.
| | - Mei Cui
- Department of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology, Fudan University, No. 12 Middle Wulumuqi Road, Shanghai, 200040, China.
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Liu JJ, Yeoh LY, Sum CF, Tavintharan S, Ng XW, Liu S, Lee SBM, Tang WE, Lim SC. Vascular cell adhesion molecule-1, but not intercellular adhesion molecule-1, is associated with diabetic kidney disease in Asians with type 2 diabetes. J Diabetes Complications 2015; 29:707-12. [PMID: 25857767 DOI: 10.1016/j.jdiacomp.2015.02.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 02/04/2015] [Accepted: 02/23/2015] [Indexed: 01/03/2023]
Abstract
BACKGROUND AND AIMS The association of adhesion molecules ICAM-1 and VCAM-1 with cardiovascular diseases has been well-studied. However, their roles in diabetic kidney disease (DKD) are incompletely understood. We aim to study the association of plasma ICAM-1 and VCAM-1 with DKD in Asians with type 2 diabetes (T2DM). SUBJECTS AND METHODS A total of 1950 Asians with T2DM were included in this cross-sectional study. Plasma ICAM-1 and VCAM-1 were measured by immunoassays. RESULTS Renal filtration function (eGFR) declined and urinary albumin-to-creatinine ratio (ACR) levels increased progressively with the increase in plasma VCAM-1 levels. In contrast, no significant changes in eGFR and ACR were observed in subjects across different plasma ICAM-1 levels. Both ICAM-1 and VCAM-1 were correlated with ACR (rho = 0.153, p < 0.001 for VCAM-1 and ACR; rho = 0.053, p = 0.020 for ICAM-1 and ACR) in bivariate correlation analysis. However, only VCAM-1 was correlated with eGFR (rho = -0.228, p < 0.001). Multivariable linear regression models revealed that VCAM-1, but not ICAM-1, was independently associated with eGFR and albuminuria. Backward linear regression suggested that plasma VCAM-1 variability was mainly determined by eGFR whereas plasma ICAM-1 level was mainly determined by C-reactive protein in patients with T2DM. CONCLUSIONS Plasma VCAM-1 level, but not ICAM-1 level, was independently associated with prevalent DKD in Asians with T2DM. High level of ICAM-1 may be indicative of systemic inflammation and portends increase risk of incipient DKD.
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Affiliation(s)
- Jian-Jun Liu
- Clinical Research Unit, Khoo Teck Puat Hospital, 768828 Singapore
| | - Lee Ying Yeoh
- Diabetes Centre, Khoo Teck Puat Hospital, 768828 Singapore
| | - Chee Fang Sum
- Department of Medicine, Khoo Teck Puat Hospital, 768828 Singapore; Diabetes Centre, Khoo Teck Puat Hospital, 768828 Singapore
| | - Subramaniam Tavintharan
- Department of Medicine, Khoo Teck Puat Hospital, 768828 Singapore; Diabetes Centre, Khoo Teck Puat Hospital, 768828 Singapore
| | - Xiao Wei Ng
- Clinical Research Unit, Khoo Teck Puat Hospital, 768828 Singapore
| | - Sylvia Liu
- Clinical Research Unit, Khoo Teck Puat Hospital, 768828 Singapore
| | - Simon B M Lee
- Yishun Polyclinic, National Health Group, 768796 Singapore
| | - Wern Ee Tang
- Yishun Polyclinic, National Health Group, 768796 Singapore
| | - Su Chi Lim
- Department of Medicine, Khoo Teck Puat Hospital, 768828 Singapore; Diabetes Centre, Khoo Teck Puat Hospital, 768828 Singapore.
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Sha X, Meng S, Li X, Xi H, Maddaloni M, Pascual DW, Shan H, Jiang X, Wang H, Yang XF. Interleukin-35 Inhibits Endothelial Cell Activation by Suppressing MAPK-AP-1 Pathway. J Biol Chem 2015; 290:19307-18. [PMID: 26085094 DOI: 10.1074/jbc.m115.663286] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Indexed: 11/06/2022] Open
Abstract
Vascular response is an essential pathological mechanism underlying various inflammatory diseases. This study determines whether IL-35, a novel responsive anti-inflammatory cytokine, inhibits vascular response in acute inflammation. Using a mouse model of LPS-induced acute inflammation and plasma samples from sepsis patients, we found that IL-35 was induced in the plasma of mice after LPS injection as well as in the plasma of sepsis patients. In addition, IL-35 decreased LPS-induced proinflammatory cytokines and chemokines in the plasma of mice. Furthermore, IL-35 inhibited leukocyte adhesion to the endothelium in the vessels of lung and cremaster muscle and decreased the numbers of inflammatory cells in bronchoalveolar lavage fluid. Mechanistically, IL-35 inhibited the LPS-induced up-regulation of endothelial cell (EC) adhesion molecule VCAM-1 through IL-35 receptors gp130 and IL-12Rβ2 via inhibition of the MAPK-activator protein-1 (AP-1) signaling pathway. We also found that IL-27, which shares the EBI3 subunit with IL-35, promoted LPS-induced VCAM-1 in human aortic ECs and that EBI3-deficient mice had similar vascular response to LPS when compared with that of WT mice. These results demonstrated for the first time that inflammation-induced IL-35 inhibits LPS-induced EC activation by suppressing MAPK-AP1-mediated VCAM-1 expression and attenuates LPS-induced secretion of proinflammatory cytokines/chemokines. Our results provide insight into the control of vascular inflammation by IL-35 and suggest that IL-35 is an attractive novel therapeutic reagent for sepsis and cardiovascular diseases.
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Affiliation(s)
- Xiaojin Sha
- From the Centers for Metabolic Disease Research, Cardiovascular Research, and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140 and
| | - Shu Meng
- From the Centers for Metabolic Disease Research, Cardiovascular Research, and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140 and
| | - Xinyuan Li
- From the Centers for Metabolic Disease Research, Cardiovascular Research, and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140 and
| | - Hang Xi
- From the Centers for Metabolic Disease Research, Cardiovascular Research, and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140 and
| | - Massimo Maddaloni
- the Department of Infectious Diseases & Pathology, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32608
| | - David W Pascual
- the Department of Infectious Diseases & Pathology, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32608
| | - Huimin Shan
- From the Centers for Metabolic Disease Research, Cardiovascular Research, and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140 and
| | - Xiaohua Jiang
- From the Centers for Metabolic Disease Research, Cardiovascular Research, and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140 and
| | - Hong Wang
- From the Centers for Metabolic Disease Research, Cardiovascular Research, and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140 and
| | - Xiao-feng Yang
- From the Centers for Metabolic Disease Research, Cardiovascular Research, and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140 and
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Effect of propane-2-sulfonic acid octadec-9-enyl-amide on the expression of adhesion molecules in human umbilical vein endothelial cells. Eur J Pharmacol 2015; 756:15-21. [DOI: 10.1016/j.ejphar.2015.03.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 03/04/2015] [Accepted: 03/11/2015] [Indexed: 11/16/2022]
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CKD712, a synthetic isoquinoline alkaloid, enhances the anti-cancer effects of paclitaxel in MDA-MB-231 cells through regulation of PTEN. Life Sci 2014; 112:49-58. [DOI: 10.1016/j.lfs.2014.07.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 07/10/2014] [Accepted: 07/11/2014] [Indexed: 11/22/2022]
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C-type natriuretic peptide attenuates LPS-induced endothelial activation: involvement of p38, Akt, and NF-κB pathways. Amino Acids 2014; 46:2653-63. [PMID: 25096521 DOI: 10.1007/s00726-014-1816-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 07/17/2014] [Indexed: 12/13/2022]
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14
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Choi JM, Choi YH, Kim SK, Ahn KH, Won JH, Lim JH, Jang YJ, Lee S, Kim DH, Kim DK. (S)-tetrahydroisoquinoline alkaloid inhibits LPS-induced arachidonic acid release through downregulation of cPLA2 expression. Mol Cells 2013; 36:400-9. [PMID: 24293010 PMCID: PMC3887938 DOI: 10.1007/s10059-013-0078-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 09/10/2013] [Accepted: 09/15/2013] [Indexed: 01/24/2023] Open
Abstract
Sepsis, a systemic inflammatory response syndrome, remains a potentially lethal condition. (S)-1-α-Naphthylmethyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline (CKD712) is noted as a drug candidate for sepsis. Many studies have demonstrated its significant anti-inflammatory effects. Here we first examined whether CKD712 inhibits lipopolysaccharide (LPS)-induced arachidonic acid (AA) release in the RAW 264.7 mouse monocyte cell line, and subsequently, its inhibitory mechanisms. CKD712 reversed LPS-associated morphological changes in the RAW 264.7 cells, and inhibited LPS-induced release of AA in a concentrationdependent manner. The inhibition was apparently due to the diminished expression of a cytosolic form of phospholipase A2 (cPLA2) by CKD712, resulting from reduced NF-κB activation. Furthermore, CKD712 inhibited the activation of ERK1/2 and SAP/JNK, but not of p38 MAPK. CKD712 had no effect on the activity or phosphorylation of cPLA2 and on calcium influx. Our results collectively suggest that CKD712 inhibits LPS-induced AA release through the inhibition of a MAPKs/NF-κB pathway leading to reduced cPLA2 expression in RAW 264.7 cells.
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Affiliation(s)
- Jong Min Choi
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - Young Hwa Choi
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - Seok Kyun Kim
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - Kyong Hoon Ahn
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - Jong Hoon Won
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - Joo Hyuk Lim
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | - You Jin Jang
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
| | | | | | - Dae Kyong Kim
- Department of Environmental and Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
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Abstract
At least 468 individual genes have been manipulated by molecular methods to study their effects on the initiation, promotion, and progression of atherosclerosis. Most clinicians and many investigators, even in related disciplines, find many of these genes and the related pathways entirely foreign. Medical schools generally do not attempt to incorporate the relevant molecular biology into their curriculum. A number of key signaling pathways are highly relevant to atherogenesis and are presented to provide a context for the gene manipulations summarized herein. The pathways include the following: the insulin receptor (and other receptor tyrosine kinases); Ras and MAPK activation; TNF-α and related family members leading to activation of NF-κB; effects of reactive oxygen species (ROS) on signaling; endothelial adaptations to flow including G protein-coupled receptor (GPCR) and integrin-related signaling; activation of endothelial and other cells by modified lipoproteins; purinergic signaling; control of leukocyte adhesion to endothelium, migration, and further activation; foam cell formation; and macrophage and vascular smooth muscle cell signaling related to proliferation, efferocytosis, and apoptosis. This review is intended primarily as an introduction to these key signaling pathways. They have become the focus of modern atherosclerosis research and will undoubtedly provide a rich resource for future innovation toward intervention and prevention of the number one cause of death in the modern world.
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Affiliation(s)
- Paul N Hopkins
- Cardiovascular Genetics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, USA.
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Park EJ, Jang HJ, Tsoyi K, Kim YM, Park SW, Kim HJ, Lee JH, Chang KC. The heme oxygenase-1 inducer THI-56 negatively regulates iNOS expression and HMGB1 release in LPS-activated RAW 264.7 cells and CLP-induced septic mice. PLoS One 2013; 8:e76293. [PMID: 24098466 PMCID: PMC3789711 DOI: 10.1371/journal.pone.0076293] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Accepted: 08/23/2013] [Indexed: 01/18/2023] Open
Abstract
The nuclear DNA binding protein high mobility group box 1 (HMGB1) has recently been suggested to act as a late mediator of septic shock. The effect of ((S)-6,7-dihydroxy-1-(4-hydroxynaphthylmethyl)-1,2,3,4-tetrahydroisoquinoline alkaloid, also known as THI-56, in an experimental model of sepsis was investigated. THI-56 exhibited potent anti-inflammatory properties in response to LPS in RAW 264.7 cells. In particular, THI-56 significantly inhibited the expression of inducible nitric oxide synthase (iNOS) and the release of HMGB1 in activated macrophages. THI-56 activated NE-F2-regulated factor 2 (Nrf-2)/heme oxygenase 1 (HO-1). The specific knockdown of the HO-1 gene by HO-1 siRNA significantly reversed the inhibitory effects of THI-56 on iNOS expression and HMGB1 release in LPS-stimulated macrophages. Importantly, THI-56 administration protected animals from death induced by either a lethal dose of LPS or cecal ligation and puncture (CLP). Furthermore, the ALT, AST, BUN, creatinine, and HMGB1 levels in the blood were significantly increased in CLP-induced septic mice, and the administration of THI-56 reduced these levels in a concentration-dependent and zinc protoporphyrin IX (ZnPPIX)-sensitive manner. In addition, the administration of THI-56 significantly ameliorated not only lung damage but also macrophage infiltration in the livers of CLP-induced septic mice, and these effects were also abrogated in the presence of ZnPPIX. Thus, we conclude that THI-56 significantly attenuates the proinflammatory response induced by LPS and reduces organ damage in a CLP-induced sepsis model through the upregulation of Nrf-2/HO-1.
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Affiliation(s)
- Eun Jung Park
- Department of Pharmacology, School of Medicine Gyeongsang National University and Institute of Health Sciences, Jinju, Korea
| | - Hwa Jin Jang
- Department of Pharmacology, School of Medicine Gyeongsang National University and Institute of Health Sciences, Jinju, Korea
| | - Konstantin Tsoyi
- Department of Pharmacology, School of Medicine Gyeongsang National University and Institute of Health Sciences, Jinju, Korea
| | - Young Min Kim
- Department of Pharmacology, School of Medicine Gyeongsang National University and Institute of Health Sciences, Jinju, Korea
| | - Sang Won Park
- Department of Pharmacology, School of Medicine Gyeongsang National University and Institute of Health Sciences, Jinju, Korea
| | - Hye Jung Kim
- Department of Pharmacology, School of Medicine Gyeongsang National University and Institute of Health Sciences, Jinju, Korea
| | - Jae Heun Lee
- Department of Pharmacology, School of Medicine Gyeongsang National University and Institute of Health Sciences, Jinju, Korea
| | - Ki Churl Chang
- Department of Pharmacology, School of Medicine Gyeongsang National University and Institute of Health Sciences, Jinju, Korea
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Yuan M, Wang X, Zhan Q, Duan X, Yang Q, Xia J. Association of PTEN genetic polymorphisms with atherosclerotic cerebral infarction in the Han Chinese population. J Clin Neurosci 2012; 19:1641-5. [DOI: 10.1016/j.jocn.2011.11.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Revised: 11/18/2011] [Accepted: 11/26/2011] [Indexed: 10/27/2022]
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18
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Astarci E, Sade A, Çimen I, Savaş B, Banerjee S. The NF-κB target genes ICAM-1 and VCAM-1 are differentially regulated during spontaneous differentiation of Caco-2 cells. FEBS J 2012; 279:2966-86. [DOI: 10.1111/j.1742-4658.2012.08677.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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19
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de Toledo A, Nagata E, Yoshida Y, Oho T. Streptococcus oralis coaggregation receptor polysaccharides induce inflammatory responses in human aortic endothelial cells. Mol Oral Microbiol 2012; 27:295-307. [DOI: 10.1111/j.2041-1014.2012.00646.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Zhong LM, Zong Y, Sun L, Guo JZ, Zhang W, He Y, Song R, Wang WM, Xiao CJ, Lu D. Resveratrol inhibits inflammatory responses via the mammalian target of rapamycin signaling pathway in cultured LPS-stimulated microglial cells. PLoS One 2012; 7:e32195. [PMID: 22363816 PMCID: PMC3283735 DOI: 10.1371/journal.pone.0032195] [Citation(s) in RCA: 123] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Accepted: 01/24/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Resveratrol have been known to possess many pharmacological properties including antioxidant, cardioprotective and anticancer effects. Although current studies indicate that resveratrol produces neuroprotection against neurological disorders, the precise mechanisms for its beneficial effects are still not fully understood. We investigate the effect of anti-inflammatory and mechamisms of resveratrol by using lipopolysaccharide (LPS)-stimulated murine microglial BV-2 cells. METHODOLOGY/PRINCIPAL FINDINGS BV-2 cells were treated with resveratrol (25, 50, and 100 µM) and/or LPS (1 µg/ml). Nitric oxide (NO) and prostaglandin E2 (PGE2) were measured by Griess reagent and ELISA. The mRNA and protein levels of proinflammatory proteins and cytokines were analysed by RT-PCR and double immunofluorescence labeling, respectively. Phosphorylation levels of PTEN (phosphatase and tensin homolog deleted on chromosome 10), Akt, mammalian target of rapamycin (mTOR), mitogen-activated protein kinases (MAPKs) cascades, inhibitor κB-α (IκB-α) and cyclic AMP-responsive element-binding protein (CREB) were measured by western blot. Resveratrol significantly attenuated the LPS-induced expression of NO, PGE2, inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and nuclear factor-κB (NF-κB) in BV-2 cells. Resveratrol increased PTEN, Akt and mTOR phosphorylation in a dose-dependent manner or a time-dependent manner. Rapamycin (10 nM), a specific mTOR inhibitor, blocked the effects of resveratrol on LPS-induced microglial activation. In addition, mTOR inhibition partially abolished the inhibitory effect of resveratrol on the phosphorylation of IκB-α, CREB, extracellular signal-regulated kinase 1/2 (ERK1/2), c-Jun N-terminal protein kinase (JNK), and p38 mitogen-activated protein kinase (p38 MAPK). CONCLUSION AND IMPLICATIONS This study indicates that resveratrol inhibited LPS-induced proinflammatory enzymes and proinflammatory cytokines via down-regulation phosphorylation of NF-κB, CREB and MAPKs family in a mTOR-dependent manner. These findings reveal, in part, the molecular basis underlying the anti-inflammatory properties of resveratrol.
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Affiliation(s)
- Lian-Mei Zhong
- School of Life Science, Yunnan University, Kunming, Yunnan, China
- Department of Neurology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Yi Zong
- Department of Anatomy, Kunming Medical University, Kunming, Yunnan, China
| | - Lin Sun
- Department of Cardiology, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Jia-Zhi Guo
- Department of Anatomy, Kunming Medical University, Kunming, Yunnan, China
| | - Wei Zhang
- Department of Neurology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Ying He
- Department of Anatomy, Kunming Medical University, Kunming, Yunnan, China
| | - Rui Song
- Department of Cardiology, the Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Wen-Min Wang
- Department of Neurology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Chun-Jie Xiao
- School of Life Science, Yunnan University, Kunming, Yunnan, China
- * E-mail: (DL); (CJX)
| | - Di Lu
- Department of Anatomy, Kunming Medical University, Kunming, Yunnan, China
- * E-mail: (DL); (CJX)
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Lee J, Yang EJ, Shin JS, Kim DH, Lee SS, Choi IH. CKD-712, (S)-1-(α-naphthylmethyl)-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline, Inhibits the NF-κB Activation and Augments Akt Activation during TLR4 Signaling. Immune Netw 2011; 11:420-3. [PMID: 22346785 PMCID: PMC3275714 DOI: 10.4110/in.2011.11.6.420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 11/11/2011] [Accepted: 11/15/2011] [Indexed: 12/31/2022] Open
Abstract
Since CKD-712 has been developed as an anti-inflammatory agent, we examined the effect of CKD-712 during TLR4 signaling. Using HEK293 cells expressing TLR4, CKD-712 was pre-treated 1 hr before LPS stimulation. Activation of NF-κB was assessed by promoter assay. The activation of ERK, JNK, p38, IRF3 and Akt was measured by western blotting. CKD-712 inhibited the NF-κB signaling triggered by LPS. The activation of ERK, JNK, p38 or IRF3 was not inhibited by CKD-712. On the contrary the activation of these molecules was augmented slightly. The activation of Akt with stimulation of LPS was also enhanced with CKD-712 pre-treatment at lower concentration, but was inhibited at higher concentration. We suggest that during TLR4 signaling CKD-712 inhibits NF-κB activation. However, CKD-712 augmented the activation of Akt as well as Map kinases. Therefore, we suggest that CKD-712 might have a role as an immunomodulator.
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Affiliation(s)
- Jeonggi Lee
- Department of Microbiology, Brain Korea 21 Project for Medical Science, Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul 120-752, Korea
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Hwa JS, Mun L, Kim HJ, Seo HG, Lee JH, Kwak JH, Lee DU, Chang KC. Genipin Selectively Inhibits TNF-α-activated VCAM-1 But Not ICAM-1 Expression by Upregulation of PPAR-γ in Human Endothelial Cells. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2011; 15:157-62. [PMID: 21860594 DOI: 10.4196/kjpp.2011.15.3.157] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 06/14/2011] [Accepted: 06/15/2011] [Indexed: 11/15/2022]
Abstract
Vascular inflammation process has been suggested to be an important risk factor in the development of atherosclerosis. Recently we reported that induction of peroxisome proliferator-activated receptor-γ (PPAR-γ) selectively inhibits vascular cell adhesion molecule-1 (VCAM-1) but not intercellular cell adhesion molecule-1 (ICAM-1) in tumor necrosis factor (TNF)-α-activated human umbilical vein endothelial cells (HUVEC). In this study, we investigated whether genipin inhibits expression of cellular adhesion molecules, which is relevant to inflammation. Pretreatment with genipin reduced reactive oxygen species (ROS) production and expression of VCAM-1, but not ICAM-1 in TNF-α-activated HUVEC. Genipin dose- and time-dependently increased PPAR-γ expression and inhibited TNF-α-induced phosphorylation of Akt and PKC with different degrees. Finally, genipin prevented TNF-α-induced adhesion of U937 monocytic cells to HUVEC. Taken together, these results indicate that upregualtion of PPAR-γ by genipin selectively inhibits TNF-α-induced expression of VCAM-1, in which regulation of Akt and/or PKC play a key role. We concluded that genipin can be used for the treatment of cardiovascular disorders such as atherosclerosis.
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Affiliation(s)
- Jung Seok Hwa
- Department of Urology, School of Medicine, and Institute of Health Sciences, Gyeongsang National University, Jinju 660-290, Korea
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23
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Chen C, Jin X, Meng X, Zheng C, Shen Y, Wang Y. Inhibition of TNFα-induced adhesion molecule expression by (Z)-(S)-9-octadecenamide, N-(2-hydroxyethyl,1-methyl). Eur J Pharmacol 2011; 660:305-9. [DOI: 10.1016/j.ejphar.2011.04.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 03/18/2011] [Accepted: 04/06/2011] [Indexed: 10/18/2022]
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Jun MS, Ha YM, Kim HS, Jang HJ, Kim YM, Lee YS, Kim HJ, Seo HG, Lee JH, Lee SH, Chang KC. Anti-inflammatory action of methanol extract of Carthamus tinctorius involves in heme oxygenase-1 induction. JOURNAL OF ETHNOPHARMACOLOGY 2011; 133:524-530. [PMID: 20969944 DOI: 10.1016/j.jep.2010.10.029] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 10/05/2010] [Accepted: 10/13/2010] [Indexed: 05/30/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The methanol extracts of Carthamus tinctorius (MEC) have long been used in traditional medicine as anti-inflammatory agent, however, the molecular mechanism by which MEC shows anti-inflammatory action is not investigated. AIM OF THE STUDY Induction of heme oxygenase-1 (HO-1) by many medicinal herbs has been reported excellent anti-inflammatory action. Thus, the aim of the study is to explore whether anti-inflammatory action of MEC is related with HO-1 induction in RAW 264.7 cells. MATERIALS AND METHODS The present study was designed to investigate as to MEC induces HO-1 expression so that it reduces inflammation by suppression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) expression in cells activated with lipopolysaccharide (LPS). RESULTS Expression of HO-1 protein by MEC in macrophages was increased in a concentration- and time-dependent manner. Treatment with MEC significantly inhibited upregulation of both iNOS and COX-2 in LPS-activated macrophages and consequently reduced production of NO and PGE(2), respectively. The reduced expression of iNOS and COX-2 by MEC was reversed by siHO-1 RNA transfection. In addition, NF-E2-related factor (Nrf2) was translocated from cytosol to nucleus by MEC. The binding of NF-κB as well as NF-κB luciferase activity was also significantly diminished by MEC. Finally, tumor necrosis factor (TNF)-α-mediated VCAM-1 expression in endothelial cell was significantly inhibited by MEC. CONCLUSIONS The present results show that MEC induces HO-1 expression via Nrf2 translocation and inhibits NF-κB activity, which may be responsible for anti-inflammatory action. Therefore, we propose that anti-inflammatory action of MEC involves at least HO-1 induction.
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Affiliation(s)
- Min Soo Jun
- Department of Pharmacology, School of Medicine, and Institute of Health Sciences, Gyeongsang National University, 92 Chilam-dong, Jinju 660-751, Republic of Korea
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Moon L, Ha YM, Jang HJ, Kim HS, Jun MS, Kim YM, Lee YS, Lee DH, Son KH, Kim HJ, Seo HG, Lee JH, Kim YS, Chang KC. Isoimperatorin, cimiside E and 23-O-acetylshengmanol-3-xyloside from Cimicifugae rhizome inhibit TNF-α-induced VCAM-1 expression in human endothelial cells: involvement of PPAR-γ upregulation and PI3K, ERK1/2, and PKC signal pathways. JOURNAL OF ETHNOPHARMACOLOGY 2011; 133:336-44. [PMID: 20937376 DOI: 10.1016/j.jep.2010.10.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2010] [Revised: 09/15/2010] [Accepted: 10/01/2010] [Indexed: 05/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The methanol extract of Cimicifugae Rhizome has been traditionally used in various disorders including inflammation. AIM OF THE STUDY The aim of the study is to explore whether anti-inflammatory action of 3 active compounds, two triterpenoid glycosides (cimiside E, 23-O-actylshengmanol-3-xyloside) and one furanocoumarin (isoimperatorin), isolated from Cimicifugae Rhizome is related with peroxisome proliferator-activated receptor-γ (PPAR-γ) expression in human umbilical endothelial cell line, EA.hy926 cells. MATERIALS AND METHODS Cell viability and production of reactive oxygen species were performed. In addition, adhesion of monocyte into endothelial cells and western blot for expression of adhesion molecules and signal proteins were investigated in tumor necrosis factor-α (TNF-α)-activated cells. RESULTS Pretreatment of test compounds significantly reduced reactive oxygen species (ROS) production and expression of vascular cell adhesion molecule-1 (VCAM-1), but not intercellular cell adhesion molecule-1 (ICAM-1). Three compounds all dose-dependently increased not only PPAR-γ expression in EA.hy926 cells but inhibited TNF-α-induced phosphorylation of Akt, extracellular-signal-regulated kinase (ERK) and protein kinase C (PKC) with different specificity. Finally, they prevented TNF-α-induced adhesion of U937 monocytic cells to EA.hy926 cells. CONCLUSIONS The present results show that cimiside E, 23-O-actylshengmanol-3-xyloside, isoimperatorin isolated from Cimicifugae Rhizome selectively inhibits TNF-α-induced expression of VCAM-1 at least by upregulation of PPAR-γ, and signals for ERK1/2, PI3K, and PKC are involved in this effect.
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Affiliation(s)
- Lidiya Moon
- Department of Pharmacology School of Medicine, and Institute of Health Sciences, Gyeongsang National University, 92 Chilam-dong, Jinju 660-751, Republic of Korea
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Tsoyi K, Jang HJ, Nizamutdinova IT, Park K, Kim YM, Kim HJ, Seo HG, Lee JH, Chang KC. PTEN differentially regulates expressions of ICAM-1 and VCAM-1 through PI3K/Akt/GSK-3β/GATA-6 signaling pathways in TNF-α-activated human endothelial cells. Atherosclerosis 2010; 213:115-21. [DOI: 10.1016/j.atherosclerosis.2010.07.061] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Revised: 07/01/2010] [Accepted: 07/30/2010] [Indexed: 10/19/2022]
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7,8-didehydrocimigenol from Cimicifugae rhizoma inhibits TNF-α-induced VCAM-1 but not ICAM-1expression through upregulation of PPAR-γ in human endothelial cells. Food Chem Toxicol 2010; 49:166-72. [PMID: 20946932 DOI: 10.1016/j.fct.2010.10.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2010] [Revised: 09/14/2010] [Accepted: 10/08/2010] [Indexed: 11/20/2022]
Abstract
Activators of PPAR have been demonstrated to inhibit the induction of VCAM-1 but not ICAM-1 in human endothelial cells (EC). During the screening of anti-inflammatory activity of traditional herbs, we found 7,8-didehydrocimigenol (7,8-DHC), one of active triterpenoids of Cimicifugae rhizoma (C. rhizoma) increases PPAR-γ expression in EC in a time- and dose-dependent manner. Therefore, we asked whether 7,8-DHC selectively inhibits the expression of VCAM-1 but not ICAM-1 in TNF-α-activated EC via upregulation of PPAR-γ. Treatment with 7,8-DHC or PPAR-γ agonists (GW1929, troglitazone) inhibited the expression of VCAM-1 but not ICAM-1. Furthermore, the selective inhibition of VCAM-1 expression was inhibited by PPAR-γ antagonist, GW9662, or siPPAR-γ-transfected cells. 7,8-DHC significantly inhibited NF-kB activity via inhibition of phosphorylation of IkB and it also inhibited phosphorylation of ERK1/2 and Akt but not PKC. Finally, attachment of monocytes (U937) to EC by TNF-α was significantly reduced by 7,8-DHC. These results indicate that upregualtion of PPAR-γ by 7,8-DHC in EC inhibits NF-kB activity of TNF-α-activated EC which leads to selective inhibition of VCAM-1 expression. In addition, ERK1/2 and Akt signal pathways are involved in differential regulation by 7,8-DHC. We concluded that 7,8-DHC can be used for the treatment of cardiovascular disorders such as atherosclerosis.
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