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Chen T, Wu S, Feng L, Long S, Liu Y, Zhang C, Lu W, Shen Y, Jiang S, Chen W, Hong G, Zhou L, Wang F, Luo Y, Zou H. The association between activation of the ERK1/2-NF-κB signaling pathway by TIMP2 expression and chronic renal allograft dysfunction in the CRAD rat model. Transpl Immunol 2024; 82:101984. [PMID: 38184210 DOI: 10.1016/j.trim.2023.101984] [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] [Received: 08/01/2023] [Revised: 12/05/2023] [Accepted: 12/31/2023] [Indexed: 01/08/2024]
Abstract
PURPOSE The tissue inhibitor of metalloproteinase 2 (TIMP2), a natural inhibitor of matrix metalloproteinase (MMP), regulates inflammation, fibrosis, and cell proliferation. Chronic renal allograft dysfunction (CRAD) is a primary factor affecting the long-term survival of renal allografts. We assessed whether up-regulation of TIMP2 expression may affect the ERK1/2-NF-κB signaling pathway and CRAD development. METHODS Lewis rats received orthotopic F344 kidney allografts to establish the classical CRAD model. The treatment group was injected with a lentivirus encoding a TIMP2-targeting small hairpin (sh)RNA (LTS) at 5 × 108 TU/ml monthly after kidney transplantation. A second CRAD group was injected with a lentivirus TIMP2-control vector (LTC). After 12 weeks, blood, urine, and kidney tissue were harvested to evaluate renal function and pathological examinations. Hematoxylin and eosin staining, Masson staining, and Periodic acid-Schiff staining were performed for renal histopathological evaluation according to the Banff criteria. TIMP2, phospho (p)-ERK1/2, p-p65 (NF-κB) expression levels were measured via immunohistochemical and Western blot analyses. RESULTS Compared to the F344 and Lewis control groups, the expression of TIMP2, p-ERK1/2, and p-p65 were significantly higher in the CRAD and CRAD+LTC renal tissues (p < 0.05). There were also increased levels of serum creatinine, nitrogen, and 24 h urinary protein in these two groups (p < 0.05). Typical histopathological changes of CRAD were observed in the CRAD and CRAD+LTC groups. Administration of LTS effectively decreased the expression of TIMP2, p-ERK1/2, and p-P65, and reduced interstitial fibrosis and macrophage infiltration in the treatment group (p < 0.05). Additionally, MCP1 and ICAM-1, which are downstream cytokines of the NF-κB pathway, were also inhibited in the renal rat kidney from the LTS group (p < 0.05). Furthermore, renal function was well preserved in the LTS group compared to the CRAD group and CRAD+LTC group. CONCLUSION A decrease of TIMP2 can alleviate the progression of inflammation in CRAD via inhibition of the ERK1/2-NF-κB signaling pathway.
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Affiliation(s)
- Tong Chen
- South China Hospital of Shenzhen University, Shenzhen 518116, China; Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, National Regional Key Technology Engineering Laboratory for Medical Ultrasound School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, China
| | - Shiquan Wu
- South China Hospital of Shenzhen University, Shenzhen 518116, China
| | - Ling Feng
- Department of Nephrology, Shenzhen Hospital, Southern Medical University, Shenzhen, People's Republic of China
| | - Siyu Long
- South China Hospital of Shenzhen University, Shenzhen 518116, China
| | - Yu Liu
- South China Hospital of Shenzhen University, Shenzhen 518116, China; Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, National Regional Key Technology Engineering Laboratory for Medical Ultrasound School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, China
| | - Caibin Zhang
- School of Medicine, The Chinese University of Hong Kong, Shenzhen, China
| | - Wenqian Lu
- School of Medicine, The Chinese University of Hong Kong, Shenzhen, China
| | - Yuli Shen
- School of Medicine, The Chinese University of Hong Kong, Shenzhen, China
| | - Shanshan Jiang
- South China Hospital of Shenzhen University, Shenzhen 518116, China
| | - Wenya Chen
- South China Hospital of Shenzhen University, Shenzhen 518116, China
| | - Guoai Hong
- South China Hospital of Shenzhen University, Shenzhen 518116, China
| | - Li Zhou
- South China Hospital of Shenzhen University, Shenzhen 518116, China
| | - Fang Wang
- South China Hospital of Shenzhen University, Shenzhen 518116, China
| | - Yuechan Luo
- South China Hospital of Shenzhen University, Shenzhen 518116, China
| | - Hequn Zou
- South China Hospital of Shenzhen University, Shenzhen 518116, China; School of Medicine, The Chinese University of Hong Kong, Shenzhen, China.
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Wang M, Xie JW, Zheng YW, Wang XT, Yi DY, Lin Y, Tong ML, Lin LR. Tp47-Induced Monocyte-Derived Microvesicles Promote the Adherence of THP-1 Cells to Human Umbilical Vein Endothelial Cells via an ERK1/2-NF-κB Signaling Cascade. Microbiol Spectr 2023; 11:e0188823. [PMID: 37382544 PMCID: PMC10434049 DOI: 10.1128/spectrum.01888-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 06/10/2023] [Indexed: 06/30/2023] Open
Abstract
The Treponema pallidum membrane protein Tp47 induces immunocyte adherence to vascular cells and contributes to vascular inflammation. However, it is unclear whether microvesicles are functional inflammatory mediators between vascular cells and immunocytes. Microvesicles that were isolated from Tp47-treated THP-1 cells using differential centrifugation were subjected to adherence assays to determine the adhesion-promoting effect on human umbilical vein endothelial cells (HUVECs). Intercellular adhesion molecule 1 (ICAM-1) and vascular cell adhesion molecule 1 (VCAM-1) levels in Tp47-induced microvesicle (Tp47-microvesicle)-treated HUVECs were measured, and the related intracellular signaling pathways of Tp47-microvesicle-induced monocyte adhesion were investigated. Tp47-microvesicles promoted THP-1 cell adhesion to HUVECs (P < 0.01) and upregulated ICAM-1 and VCAM-1 expression in HUVECs (P < 0.001). The adhesion of THP-1 cells to HUVECs was inhibited by anti-ICAM-1 and anti-VCAM-1 neutralizing antibodies. Tp47-microvesicle treatment of HUVECs activated the extracellular signal-regulated kinase 1/2 (ERK1/2) and NF-κB signaling pathways, whereas ERK1/2 and NF-κB inhibition suppressed the expression of ICAM-1 and VCAM-1 and significantly decreased the adhesion of THP-1 cells to HUVECs. IMPORTANCE Tp47-microvesicles promote the adhesion of THP-1 cells to HUVECs through the upregulation of ICAM-1 and VCAM-1 expression, which is mediated by the activation of the ERK1/2 and NF-κB pathways. These findings provide insight into the pathophysiology of syphilitic vascular inflammation.
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Affiliation(s)
- M. Wang
- Center of Clinical Laboratory, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- Institute of Infectious Disease, School of Medicine, Xiamen University, Xiamen, China
| | - J.-W. Xie
- Center of Clinical Laboratory, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- Institute of Infectious Disease, School of Medicine, Xiamen University, Xiamen, China
| | - Y.-W. Zheng
- Center of Clinical Laboratory, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- Institute of Infectious Disease, School of Medicine, Xiamen University, Xiamen, China
| | - X.-T. Wang
- Center of Clinical Laboratory, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- Institute of Infectious Disease, School of Medicine, Xiamen University, Xiamen, China
| | - D.-Y. Yi
- Center of Clinical Laboratory, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- Institute of Infectious Disease, School of Medicine, Xiamen University, Xiamen, China
| | - Y. Lin
- Center of Clinical Laboratory, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- Institute of Infectious Disease, School of Medicine, Xiamen University, Xiamen, China
| | - M.-L. Tong
- Center of Clinical Laboratory, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- Institute of Infectious Disease, School of Medicine, Xiamen University, Xiamen, China
| | - L.-R. Lin
- Center of Clinical Laboratory, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- Institute of Infectious Disease, School of Medicine, Xiamen University, Xiamen, China
- Department of Basic Medical Science, Xiamen Medical College, Xiamen, China
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Liu P, Ma G, Wang Y, Wang L, Li P. Therapeutic effects of traditional Chinese medicine on gouty nephropathy: Based on NF-κB signalingpathways. Biomed Pharmacother 2023; 158:114199. [PMID: 36916428 DOI: 10.1016/j.biopha.2022.114199] [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] [Received: 11/15/2022] [Revised: 12/20/2022] [Accepted: 12/30/2022] [Indexed: 01/04/2023] Open
Abstract
As the final product of purine metabolism, excess serum uric acid (SUA) aggravates the process of some metabolic diseases. SUA causes renal tubule damage, interstitial fibrosis, and glomerular hardening, leading to gouty nephropathy (GN). A growing number of investigations have shown that NF-κB mediated inflammation and oxidative stress have been directly involved in the pathogenesis of GN. Traditional Chinese medicine's treatment methods of GN have amassed a wealth of treatment experience. In this review, we first describe the mechanism of NF-κB signaling pathways in GN. Subsequently, we highlight traditional Chinese medicine that can treat GN through NF-κB pathways. Finally, commenting on promising candidate targets of herbal medicine for GN treatment via suppressing NF-κB signaling pathways was summarized.
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Affiliation(s)
- Peng Liu
- Shunyi Hospital, Beijing Hospital of Traditional Chinese Medicine, Station East 5, Shunyi District, Beijing 101300, China
| | - Guijie Ma
- Renal Division, Department of Medicine, Heilongjiang Academy of Chinese Medicine Sciences, Harbin, China
| | - Yang Wang
- Renal Division, Department of Medicine, Heilongjiang Academy of Chinese Medicine Sciences, Harbin, China
| | - Lifan Wang
- Renal Division, Department of Medicine, Heilongjiang Academy of Chinese Medicine Sciences, Harbin, China.
| | - Ping Li
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, China-Japan Friendship Hospital, Beijing, China.
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The landscape of immune cell infiltration in the glomerulus of diabetic nephropathy: evidence based on bioinformatics. BMC Nephrol 2022; 23:303. [PMID: 36064366 PMCID: PMC9442983 DOI: 10.1186/s12882-022-02906-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 07/29/2022] [Indexed: 11/10/2022] Open
Abstract
Background Increasing evidence suggests that immune cell infiltration contributes to the pathogenesis and progression of diabetic nephropathy (DN). We aim to unveil the immune infiltration pattern in the glomerulus of DN and provide potential targets for immunotherapy. Methods Infiltrating percentage of 22 types of immune cell in the glomerulus tissues were estimated by the CIBERSORT algorithm based on three transcriptome datasets mined from the GEO database. Differentially expressed genes (DEGs) were identified by the “limma” package. Then immune-related DEGs were identified by intersecting DEGs with immune-related genes (downloaded from Immport database). The protein–protein interactions of Immune-related DEGs were explored using the STRING database and visualized by Cytoscape. The enrichment analyses for KEGG pathways and GO terms were carried out by the gene set enrichment analysis (GSEA) method. Results 11 types of immune cell were revealed to be significantly altered in the glomerulus tissues of DN (Up: B cells memory, T cells gamma delta, NK cells activated, Macrophages.M1, Macrophages M2, Dendritic cells resting, Mast cells resting; Down: B cells naive, NK cells resting, Mast cells activated, Neutrophils). Several pathways related to immune, autophagy and metabolic process were significantly activated. Moreover, 6 hub genes with a medium to strong correlation with renal function (eGFR) were identified (SERPINA3, LTF, C3, PTGDS, EGF and ALB). Conclusion In the glomerulus of DN, the immune infiltration pattern changed significantly. A complicated and tightly regulated network of immune cells exists in the pathological of DN. The hub genes identified here will facilitate the development of immunotherapy. Supplementary Information The online version contains supplementary material available at 10.1186/s12882-022-02906-4.
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Song X, He Y, Liu M, Yang Y, Yuan Y, Yan J, Zhang M, Huang J, Zhang S, Mo F. Mechanism underlying Polygonum capitatum effect on Helicobacter pylori-associated gastritis based on network pharmacology. Bioorg Chem 2021; 114:105044. [PMID: 34157554 DOI: 10.1016/j.bioorg.2021.105044] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 05/24/2021] [Accepted: 05/28/2021] [Indexed: 02/07/2023]
Abstract
Helicobacter pylori (H. pylori) infection is a common disease that can cause H. pylori-associated gastritis (HAG), peptic ulcers, and gastric cancer. As a traditional Chinese medicine, Polygonum capitatum (PC) manifests its unique advantages in the prevention and treatment of complex diseases and chronic diseases, due to its ability to clear heat, detoxify and relieve pain, promote blood circulation, and remove blood stasis. In order to explore the molecular mechanism of PC for HAG, the study collected the predicted targets of active compounds, conducted functional analysis by the STRING database, collected HAG differential expression genes, and conducted KEGG enrichment analysis on the intersection of predicted targets and differential expression genes of gastritis by Cluego. The results show that PC works mainly by affecting phosphorylation of IκBα, NF-κB p65, p38MAPK, and ERK1/2 and nuclear transposition of NF-κB p65 and p-p38MAPK, which has been proved by in vivo and in vitro experiments. These results suggest that PC may act on HAG with multiple targets and pathways, and play a key role in the process of HAG treatment.
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Affiliation(s)
- Xiaohan Song
- Department of Basic Clinical Laboratory Medicine, School of Clinical Laboratory Science, Guizhou Medical University, No. 9 Beijing Road, Yunyan District, Guiyang 550004, China
| | - Yun He
- Department of Clinical Laboratory, Affiliated Hospital of Guizhou Medical University, No. 28 Guiyi Street, Yunyan District, Guiyang 550004, China
| | - Min Liu
- Department of Basic Clinical Laboratory Medicine, School of Clinical Laboratory Science, Guizhou Medical University, No. 9 Beijing Road, Yunyan District, Guiyang 550004, China
| | - Ye Yang
- Department of Basic Clinical Laboratory Medicine, School of Clinical Laboratory Science, Guizhou Medical University, No. 9 Beijing Road, Yunyan District, Guiyang 550004, China
| | - Yan Yuan
- Department of Basic Clinical Laboratory Medicine, School of Clinical Laboratory Science, Guizhou Medical University, No. 9 Beijing Road, Yunyan District, Guiyang 550004, China
| | - Jiaoyan Yan
- Department of Basic Clinical Laboratory Medicine, School of Clinical Laboratory Science, Guizhou Medical University, No. 9 Beijing Road, Yunyan District, Guiyang 550004, China
| | - Mengwei Zhang
- Department of Basic Clinical Laboratory Medicine, School of Clinical Laboratory Science, Guizhou Medical University, No. 9 Beijing Road, Yunyan District, Guiyang 550004, China
| | - Jian Huang
- Department of Clinical Laboratory, Affiliated Hospital of Guizhou Medical University, No. 28 Guiyi Street, Yunyan District, Guiyang 550004, China
| | - Shu Zhang
- Department of Basic Clinical Laboratory Medicine, School of Clinical Laboratory Science, Guizhou Medical University, No. 9 Beijing Road, Yunyan District, Guiyang 550004, China; Department of Clinical Laboratory, Affiliated Hospital of Guizhou Medical University, No. 28 Guiyi Street, Yunyan District, Guiyang 550004, China.
| | - Fei Mo
- Department of Basic Clinical Laboratory Medicine, School of Clinical Laboratory Science, Guizhou Medical University, No. 9 Beijing Road, Yunyan District, Guiyang 550004, China; Department of Clinical Laboratory, Affiliated Hospital of Guizhou Medical University, No. 28 Guiyi Street, Yunyan District, Guiyang 550004, China.
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Chen J, Zhang Y, Wang Y, Jiang P, Zhou G, Li Z, Yang J, Li X. Potential mechanisms of Guizhi decoction against hypertension based on network pharmacology and Dahl salt-sensitive rat model. Chin Med 2021; 16:34. [PMID: 33906674 PMCID: PMC8077739 DOI: 10.1186/s13020-021-00446-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 04/20/2021] [Indexed: 12/11/2022] Open
Abstract
Background Guizhi decoction (GZD), a classical Chinese herbal formula, has been widely used to treat hypertension, but its underlying mechanisms remain elusive. The present study aimed to explore the potential mechanisms and therapeutic effects of GZD on hypertension by integrating network pharmacology and experimental validation. Methods The active ingredients and corresponding targets were collected from the Traditional Chinese Medicine Systems Pharmacology database and Analysis Platform (TCMSP). The targets related to hypertension were identified from the CTD, GeneCards, OMIM and Drugbank databases. Multiple networks were constructed to identify the key compounds, hub targets, and main biological processes and pathways of GZD against hypertension. The Surflex-Dock software was used to validate the binding affinity between key targets and their corresponding active compounds. The Dahl salt-sensitive rat model was used to evaluate the therapeutic effects of GZD against hypertension. Results A total of 112 active ingredients, 222 targets of GZD and 341 hypertension-related targets were obtained. Furthermore, 56 overlapping targets were identified, five of which were determined as the hub targets for experimental verification, including interleukin 6 (IL-6), C–C motif chemokine 2 (CCL2), IL-1β, matrix metalloproteinase 2 (MMP-2), and MMP-9. Pathway enrichment analysis results indicated that 56 overlapping targets were mainly enriched in several inflammation pathways such as the tumor necrosis factor (TNF) signaling pathway, Toll-like receptor (TLR) signaling pathway and nuclear factor kappa-B (NF-κB) signaling pathway. Molecular docking confirmed that most active compounds of GZD could bind tightly to the key targets. Experimental studies revealed that the administration of GZD improved blood pressure, reduced the area of cardiac fibrosis, and inhibited the expression of IL-6, CCL2, IL-1β, MMP-2 and MMP-9 in rats. Conclusion The potential mechanisms and therapeutic effects of GZD on hypertension may be attributed to the regulation of cardiac inflammation and fibrosis. Supplementary Information The online version contains supplementary material available at 10.1186/s13020-021-00446-x.
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Affiliation(s)
- Jiye Chen
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China
| | - Yongjian Zhang
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China
| | - Yongcheng Wang
- Department of Cardiovascular, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, China
| | - Ping Jiang
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China
| | - Guofeng Zhou
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China
| | - Zhaoyu Li
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China
| | - Jinlong Yang
- Department of Cardiovascular, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, China
| | - Xiao Li
- Department of Cardiovascular, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, China.
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Alpha-2-Macroglobulin, a Hypochlorite-Regulated Chaperone and Immune System Modulator. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:5410657. [PMID: 31428227 PMCID: PMC6679887 DOI: 10.1155/2019/5410657] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 06/02/2019] [Indexed: 12/15/2022]
Abstract
Alpha-macroglobulins are ancient proteins that include monomeric, dimeric, and tetrameric family members. In humans, and many other mammals, the predominant alpha-macroglobulin is alpha-2-macroglobulin (α2M), a tetrameric protein that is constitutively abundant in biological fluids (e.g., blood plasma, cerebral spinal fluid, synovial fluid, ocular fluid, and interstitial fluid). α2M is best known for its remarkable ability to inhibit a broad spectrum of proteases, but the full gamut of its activities affects diverse biological processes. For example, α2M can stabilise and facilitate the clearance of the Alzheimer's disease-associated amyloid beta (Aβ) peptide. Additionally, α2M can influence the signalling of cytokines and growth factors including neurotrophins. The results of several studies support the idea that the functions of α2M are uniquely regulated by hypochlorite, an oxidant that is generated during inflammation, which induces the native α2M tetramer to dissociate into dimers. This review will discuss the evidence for hypochlorite-induced regulation of α2M and the possible implications of this in neuroinflammation and neurodegeneration.
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Wang X, Tang D, Zou Y, Wu X, Chen Y, Li H, Chen S, Shi Y, Niu H. A mitochondrial-targeted peptide ameliorated podocyte apoptosis through a HOCl-alb-enhanced and mitochondria-dependent signalling pathway in diabetic rats and in vitro. J Enzyme Inhib Med Chem 2019; 34:394-404. [PMID: 30734599 PMCID: PMC6327984 DOI: 10.1080/14756366.2018.1488697] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Mitochondria play important roles in the development of diabetic kidney disease (DKD). The SS peptide is a tetrapeptide that is located and accumulated in the inner mitochondrial membrane; it reduces reactive oxygen species (ROS) and prevents mitochondrial dysfunction. Podocytes are key cellular components in DKD progression. However, whether the SS peptide can exert renal protection through podocytes and the mechanism involved are unknown. In the present study, we explored the mechanisms of the SS peptide on podocyte injury in vivo and in vitro. Compared with the control group, the glomerular podocyte number and expression of WT1 were significantly reduced and TUNEL-positive podocytes were significantly increased in renal tissues in the diabetic rat. These effects were further exacerbated by hypochlorite-modified albumin (HOCl-alb) challenge but prevented by SS-31. In vitro, SS-31 blocked apoptosis in podocyte cell line induced by HOCl-alb. SS-31 prevented oxidative stress and mitochondria-dependent apoptosis signalling by HOCl-alb in vivo and in vitro, as evidenced by the release of cytochrome c (cyt c), binding of apoptosis activated factor-1 (Apaf-1) and caspase-9, and activation of caspases. These data suggest that SS-31 may prevent podocyte apoptosis, exerting renal protection in diabetes mellitus, probably through an apoptosis-related signalling pathway involving oxidative stress and culminating in mitochondria.
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Affiliation(s)
- Xiaoqiao Wang
- a Division of Nephrology, Zhujiang Hospital , Southern Medical University , Guangzhou , China
| | - Dongdong Tang
- b Division of Nephrology, Huadu District people's Hospital , Southern Medical University , Guangzhou , China
| | - Yaowei Zou
- a Division of Nephrology, Zhujiang Hospital , Southern Medical University , Guangzhou , China
| | - Xiaoyu Wu
- a Division of Nephrology, Zhujiang Hospital , Southern Medical University , Guangzhou , China
| | - Yihua Chen
- a Division of Nephrology, Zhujiang Hospital , Southern Medical University , Guangzhou , China
| | - Hongying Li
- c Special Medical Service Center, Zhujiang Hospital , Southern Medical University , Guangzhou , China
| | - Siqi Chen
- a Division of Nephrology, Zhujiang Hospital , Southern Medical University , Guangzhou , China
| | - Yue Shi
- c Special Medical Service Center, Zhujiang Hospital , Southern Medical University , Guangzhou , China
| | - Hongxin Niu
- c Special Medical Service Center, Zhujiang Hospital , Southern Medical University , Guangzhou , China
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Liu Y, Wei W, Hong C, Wang Y, Sun X, Ma J, Zheng F. Calreticulin induced endothelial ICAM-1 up-regulation associated with tristetraprolin expression alteration through PI3K/Akt/eNOS/p38 MAPK signaling pathway in rheumatoid arthritis. Mol Immunol 2019; 107:10-20. [PMID: 30639474 DOI: 10.1016/j.molimm.2019.01.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 01/02/2019] [Accepted: 01/04/2019] [Indexed: 12/17/2022]
Abstract
The present study was undertaken to determine whether extracellular calreticulin (CRT) participates in the regulation of ICAM-1in rheumatoid arthritis (RA) and further explore the potential mechanism. Our results showed that ICAM-1 and VCAM-1 levels were positively correlated with CRT levels in RA serum and synovial fluid, respectively. In RA synovial tissue, increased co-expressions of CRT and ICAM-1 in vascular endothelium and perivascular areas and elevated co-location of CRT and VCAM-1 localized predominantly to lining layer were observed compared to those in OA. In in vitro HUVECs model, enhanced ICAM-1expression and increased phosphorylation levels of Akt and eNOS were detected in the presence of CRT. Increased phosphorylated eNOS was significantly inhibited by a PI3K inhibitor LY294002 and elevated ICAM-1expression was partially blocked by the inhibitors of both PI3K and eNOS (L-NAME). It has been certified that the RNA-binding protein TTP targets AU-rich elements in the ICAM-1 3'-UTR and suppresses ICAM-1 expression. Knocking down TTP in HUVECs led to an increased induction of ICAM-1 by CRT. We have currently known that activation of p38 downstream kinase MK-2 leads to phosphorylation and inactivation of human TTP. The block of p38 MAPK/MK-2 signaling led to decreased protein expression and mRNA stability of TTP and ICAM-1. Furthermore, L-NAME and/or LY294002 pre-treated HUVECs manifested decreased p38 and MK-2 phosphorylation, which was accompanied by reduced TTP and ICAM-1 protein expression as well as decreased mRNA stability. Our results suggested that CRT could promote ICAM-1 expression in endothelial cells through PI3K/Akt/eNOS/p38 MAPK signaling mediated TTP accumulation, probably in an inactive form, which may provide a possible proinflammatory mechanism of CRT in RA.
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Affiliation(s)
- Yixin Liu
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China
| | - Wei Wei
- Department of Rheumatology, General Hospital, Tianjin Medical University, Tianjin 300052, China
| | - Chengcheng Hong
- Department of Laboratory Medicine, Children's Hospital of Tianjin, Tianjin 300203, China
| | - Yang Wang
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China
| | - Xuguo Sun
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China
| | - Jun Ma
- Department of Health Statistics, College of Public Health, Tianjin Medical University, Tianjin 300070, China.
| | - Fang Zheng
- Department of Clinical Immunology, School of Medical Laboratory, Tianjin Medical University, Tianjin 300203, China.
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Fei Y, Sun L, Yuan C, Jiang M, Lou Q, Xu Y. CFTR ameliorates high glucose-induced oxidative stress and inflammation by mediating the NF-κB and MAPK signaling pathways in endothelial cells. Int J Mol Med 2018; 41:3501-3508. [PMID: 29512777 DOI: 10.3892/ijmm.2018.3547] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 01/24/2018] [Indexed: 01/12/2023] Open
Abstract
Diabetic cardiovascular diseases are characterized by progressive hyperglycemia, which results in excessive production of oxidative stress and pro-inflammatory cytokines. Cystic fibrosis (CF) is characterized by chronic inflammation due to mutations in CF transmembrane conductance regulator (CFTR). However, little information is available about the role of CFTR in hyperglycemia‑induced endothelial cell oxidative stress and inflammation. In the present study, a high glucose‑treatment was applied in human umbilical vein endothelial cells with CFTR overexpression or inhibition, and the oxidative and inflammatory characteristics were measured. It was shown that CFTR protein and mRNA expression were reduced by glucose in a concentration‑dependent manner. Overexpression of CFRT via adenoviral infection significantly inhibited the production of reactive oxygen species and inflammatory biomediators induced by high glucose. Conversely, pharmacological inhibition of CFTR led to the opposite effects. Mechanistically, nuclear factor‑κB (NF‑κB) and mitogen‑activated protein kinase (MAPK) signaling were activated following high glucose treatment, which were inhibited by CFTR overexpression and enhanced by CFTR inhibition. The pro‑inflammatory effect of CFTR inhibition was abolished by pharmacological inhibition of the NF‑κB or MAPK pathways. Moreover, inhibition of MAPK abrogated CFTR inhibition‑induced NF‑κB nuclear translocation, whereas NF‑κB inhibitor produced no effects on MAPK activation. Additionally, antioxidant treatment inhibited the high glucose‑induced decrease in CFTR expression and the increase in inflammatory responses. Collectively, these findings revealed that CFTR attenuates high glucose‑induced endothelial cell oxidative stress and inflammation through inactivation of NF‑κB and MAPK signaling, indicating that elevation of CFRT expression may be a novel strategy in preventing endothelial dysfunction in diabetes.
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Affiliation(s)
- Yang Fei
- Department of Endocrinology, Fuyang First People's Hospital, Hangzhou, Zhejiang 311400, P.R. China
| | - Liqin Sun
- Department of Endocrinology, Fuyang First People's Hospital, Hangzhou, Zhejiang 311400, P.R. China
| | - Chungang Yuan
- Department of Endocrinology, Fuyang First People's Hospital, Hangzhou, Zhejiang 311400, P.R. China
| | - Min Jiang
- Department of Endocrinology, Fuyang First People's Hospital, Hangzhou, Zhejiang 311400, P.R. China
| | - Qinhua Lou
- Department of Endocrinology, Fuyang First People's Hospital, Hangzhou, Zhejiang 311400, P.R. China
| | - Yan Xu
- Department of Endocrinology, Fuyang First People's Hospital, Hangzhou, Zhejiang 311400, P.R. China
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Sirt1 Inhibits Oxidative Stress in Vascular Endothelial Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:7543973. [PMID: 28546854 PMCID: PMC5435972 DOI: 10.1155/2017/7543973] [Citation(s) in RCA: 176] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 03/15/2017] [Accepted: 03/22/2017] [Indexed: 12/15/2022]
Abstract
The vascular endothelium is a layer of cells lining the inner surface of vessels, serving as a barrier that mediates microenvironment homeostasis. Deterioration of either the structure or function of endothelial cells (ECs) results in a variety of cardiovascular diseases. Previous studies have shown that reactive oxygen species (ROS) is a key factor that contributes to the impairment of ECs and the subsequent endothelial dysfunction. The longevity regulator Sirt1 is a NAD+-dependent deacetylase that has a potential antioxidative stress activity in vascular ECs. The mechanisms underlying the protective effects involve Sirt1/FOXOs, Sirt1/NF-κB, Sirt1/NOX, Sirt1/SOD, and Sirt1/eNOs pathways. In this review, we summarize the most recent reports in this field to recapitulate the potent mechanisms involving the protective role of Sirt1 in oxidative stress and to highlight the beneficial effects of Sirt1 on cardiovascular functions.
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