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Sun W, Wang J, Liu C, Gao F, Ou Q, Tian H, Xu J, Zhang J, Li J, Xu J, Jia S, Zhang J, Xu G, Huang J, Jin C, Lu L. SUMOylation of GMFB regulates its stability and function in retinal pigment epithelial cells under hyperglycemia. Int J Biol Macromol 2024; 268:131678. [PMID: 38657921 DOI: 10.1016/j.ijbiomac.2024.131678] [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: 07/20/2023] [Revised: 04/15/2024] [Accepted: 04/16/2024] [Indexed: 04/26/2024]
Abstract
BACKGROUND Glia maturation factor beta (GMFB) is a growth and differentiation factor that acts as an intracellular regulator of signal transduction pathways. The small ubiquitin-related modifier (SUMO) modification, SUMOylation, is a posttranslational modification (PTM) that plays a key role in protein subcellular localization, stability, transcription, and enzymatic activity. Recent studies have highlighted the importance of SUMOylation in the inflammation and progression of numerous diseases. However, the relationship between GMFB and SUMOylation is unclear. RESULTS Here, we report for the first time that GMFB and SUMO1 are markedly increased in retinal pigment epithelial (RPE) cells at the early stage of diabetes mellitus (DM) under hyperglycemia. The GMFΒ protein could be mono-SUMOylated by SUMO1 at the K20, K35, K58 or K97 sites. SUMOylation of GMFB led to its increased protein stability and subcellular translocation. Furthermore, deSUMOylation of GMFΒ downregulates multiple signaling pathways, including the Jak-STAT signaling pathway, p38 pathway and NF-kappa B signaling pathway. CONCLUSIONS This work provides novel insight into the role of SUMOylated GMFB in RPE cells and provides a novel therapeutic target for diabetic retinopathy (DR).
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Affiliation(s)
- Wan Sun
- Department of Ophthalmology of Shanghai Tongji Hospital and Laboratory of Clinical Visual Science of Tongji Eye Institute, Tongji University, Shanghai 200065, China; Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai 200065, China
| | - Juan Wang
- Department of Ophthalmology of Shanghai Tongji Hospital and Laboratory of Clinical Visual Science of Tongji Eye Institute, Tongji University, Shanghai 200065, China; Department of Medical Genetics, School of Medicine, Tongji University, Shanghai 200065, China
| | - Caiying Liu
- Department of Ophthalmology of Shanghai Tongji Hospital and Laboratory of Clinical Visual Science of Tongji Eye Institute, Tongji University, Shanghai 200065, China; Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai 200065, China
| | - Furong Gao
- Department of Ophthalmology of Shanghai Tongji Hospital and Laboratory of Clinical Visual Science of Tongji Eye Institute, Tongji University, Shanghai 200065, China; Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai 200065, China
| | - Qingjian Ou
- Department of Ophthalmology of Shanghai Tongji Hospital and Laboratory of Clinical Visual Science of Tongji Eye Institute, Tongji University, Shanghai 200065, China; Department of Pharmacology, School of Medicine, Tongji University, Shanghai 200065, China
| | - Haibin Tian
- Department of Ophthalmology of Shanghai Tongji Hospital and Laboratory of Clinical Visual Science of Tongji Eye Institute, Tongji University, Shanghai 200065, China; Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai 200065, China
| | - Jingying Xu
- Department of Ophthalmology of Shanghai Tongji Hospital and Laboratory of Clinical Visual Science of Tongji Eye Institute, Tongji University, Shanghai 200065, China; Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai 200065, China
| | - Jieping Zhang
- Department of Ophthalmology of Shanghai Tongji Hospital and Laboratory of Clinical Visual Science of Tongji Eye Institute, Tongji University, Shanghai 200065, China; Department of Pharmacology, School of Medicine, Tongji University, Shanghai 200065, China
| | - Jiao Li
- Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai 200065, China
| | - Jie Xu
- Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai 200065, China
| | - Song Jia
- Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai 200065, China
| | - Jingfa Zhang
- Department of Ophthalmology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai 200025, China
| | - GuoTong Xu
- Department of Ophthalmology of Shanghai Tongji Hospital and Laboratory of Clinical Visual Science of Tongji Eye Institute, Tongji University, Shanghai 200065, China; Department of Pharmacology, School of Medicine, Tongji University, Shanghai 200065, China.
| | - Jian Huang
- Department of Biochemistry and Molecular Cell Biology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
| | - Caixia Jin
- Department of Ophthalmology of Shanghai Tongji Hospital and Laboratory of Clinical Visual Science of Tongji Eye Institute, Tongji University, Shanghai 200065, China; Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai 200065, China.
| | - Lixia Lu
- Department of Ophthalmology of Shanghai Tongji Hospital and Laboratory of Clinical Visual Science of Tongji Eye Institute, Tongji University, Shanghai 200065, China; Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai 200065, China.
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Peng W, Yang Y, Lu H, Shi H, Jiang L, Liao X, Zhao H, Wang W, Liu J. Network pharmacology combines machine learning, molecular simulation dynamics and experimental validation to explore the mechanism of acetylbinankadsurin A in the treatment of liver fibrosis. JOURNAL OF ETHNOPHARMACOLOGY 2024; 323:117682. [PMID: 38169205 DOI: 10.1016/j.jep.2023.117682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/10/2023] [Accepted: 12/26/2023] [Indexed: 01/05/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The Kadsura coccinea (Lem.) A. C. Smith is known as "Heilaohu" of the Tujia ethnomedicine in China. It has anti-tumor, anti-oxidation, anti-HIV, anti-inflammatory and liver protective effects, used to treat diseases such as rheumatoid arthritis, cancer, gastritis and hepatitis. In this research, we investigated the anti-fibrotic effect and possible mechanisms of acetylbinankadsurin A (ACBA) in vitro and in vivo, which is a natural compound derived from roots of K. coccinea. AIM OF THE STUDY We try to evaluate the efficacy of ACBA in the treatment of liver fibrosis and to explore the underlying mechanisms of ACBA by network pharmacology, machine learning, molecular docking, molecular dynamics simulations, and experimental assessment. MATERIALS AND METHODS ACBA was isolated from the CH2Cl2 layer of the roots of K. coccinea through column chromatographic techniques. The structure of ACBA was determined by using 1D and 2D NMR. CCl4-induced C57BL/6 mouse liver fibrosis models were established to evaluate the anti-fibrosis effects of ACBA in vivo. The molecular targets of ACBA and liver fibrosis were obtained from various databases, then constructed a protein-protein interaction (PPI) networks through the STRING database. Gene ontology (GO) enrichment and kyoto encyclopedia of genes and genomes (KEGG) analysis were applied using the "clusterProfiler" R package. Furthermore, the key genes for ACBA treatment of liver fibrosis were identified by the least absolute shrinkage and selection operator (LASSO). Molecular docking and molecular dynamics simulations were also carried out. Finally, the target and pathway of ACBA were verified by immunofluorescence staining, RT-PCR and Western blot. RESULT First, ACBA attenuated CCl4-induced liver injury and fibrosis in vivo. These findings were accompanied by decreased expression of α-SMA and collagen I. Second, ACBA significantly decreased serum levels of ALT, AST, TNF-α and IL-6. Then, we identified 133 potential targets of ACBA and 7987 targets of liver fibrosis. KEGG analysis showed that ACBA could regulate the drug metabolism - cytochrome P450, fructose and mannose metabolism, IL-17 and NF-κB signaling pathways. Next, six core targets was screened by LASSO analysis including AKR1B1, PFKFB3, EPHA3, CDK1, CCR1 and CYP3A4. Molecular docking showed that ACBA has a good binding affinity for CCR1. Furthermore, compared with CCR1 inhibitor BX-471, The results of molecular simulation dynamics showed that ACBA was stable in binding with CCR1. Consistently, ACBA remarkably downregulated the expression of CCR1, p-NF-κBp65, p-IκBα, p-STAT1 and TNF-α proteins, which were upregulated in CCl4-induced hepatic fibrosis and LPS-THP-1 cells. CONCLUSION Our results suggest that ACBA significantly attenuated CCl4-induced liver fibrosis in histopathological and in serum level. This effect may be mediated by CCR1, NF-κB and STAT1 signalling.
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Affiliation(s)
- Wangxia Peng
- Science and Technology Innovation Center of Hunan University of Traditional Chinese Medicine, Innovation Base of Hunan State Key Laboratory of Innovative Medicine and Traditional Chinese Medicine, Changsha, 410208, China
| | - Yupei Yang
- TCM and Ethnomedicine Innovation & Development International Laboratory, Innovative Materia Medica Research Institute, School of Pharmacy, Hunan University of Chinese Medicine, Changsha, 410208, China
| | - Huaguan Lu
- Science and Technology Innovation Center of Hunan University of Traditional Chinese Medicine, Innovation Base of Hunan State Key Laboratory of Innovative Medicine and Traditional Chinese Medicine, Changsha, 410208, China
| | - Huan Shi
- Science and Technology Innovation Center of Hunan University of Traditional Chinese Medicine, Innovation Base of Hunan State Key Laboratory of Innovative Medicine and Traditional Chinese Medicine, Changsha, 410208, China
| | - Lihong Jiang
- Science and Technology Innovation Center of Hunan University of Traditional Chinese Medicine, Innovation Base of Hunan State Key Laboratory of Innovative Medicine and Traditional Chinese Medicine, Changsha, 410208, China
| | - Xiaolin Liao
- Science and Technology Innovation Center of Hunan University of Traditional Chinese Medicine, Innovation Base of Hunan State Key Laboratory of Innovative Medicine and Traditional Chinese Medicine, Changsha, 410208, China
| | - Hongqing Zhao
- Science and Technology Innovation Center of Hunan University of Traditional Chinese Medicine, Innovation Base of Hunan State Key Laboratory of Innovative Medicine and Traditional Chinese Medicine, Changsha, 410208, China
| | - Wei Wang
- TCM and Ethnomedicine Innovation & Development International Laboratory, Innovative Materia Medica Research Institute, School of Pharmacy, Hunan University of Chinese Medicine, Changsha, 410208, China.
| | - Jianjun Liu
- Science and Technology Innovation Center of Hunan University of Traditional Chinese Medicine, Innovation Base of Hunan State Key Laboratory of Innovative Medicine and Traditional Chinese Medicine, Changsha, 410208, China.
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Zhang W, Li F, Hou J, Cheng Y, Zhang W, Liang X, Wang J. Aberrant SUMO2/3 modification of RUNX1 upon SENP1 inhibition is linked to the development of diabetic retinopathy in mice. Exp Eye Res 2023; 237:109695. [PMID: 37890757 DOI: 10.1016/j.exer.2023.109695] [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: 10/12/2023] [Accepted: 10/24/2023] [Indexed: 10/29/2023]
Abstract
Our previous report established that RUNX family transcription factor 1 (RUNX1) promotes proliferation of mouse retinal microvascular endothelial cells (mRMECs) and exacerbates diabetic retinopathy (DR). However, the mechanism behind the upregulation of RUNX1 remains unclear. This study aims to investigate the possible correlation between histone SUMOylation and RUNX1 in DR, as well as the involved molecules. A mouse model of diabetes was induced by streptozotocin (STZ). These mice had increased retinal thickness and elevated production of inflammatory cytokines. Additionally, they showed elevated levels of SUMO1 and SUMO2/3, but reduced levels of SUMO specific peptidase 1 (SENP1) in retinal tissues. Co-immunoprecipitation and Western blot assays revealed that the RUNX1 protein was primarily modified by SUMO2/3, and SENP1 inhibited SUMO2/3 modification, thereby reducing RUNX1 expression. Overexpression of SENP1 alleviated symptoms in mice and alleviated inflammation. In vitro experiments demonstrated that the SENP1 overexpression suppressed the proliferation, migration, and angiogenesis of high-glucose-induced mRMECs. However, further overexpression of RUNX1 counteracted the alleviating effects of SENP1 both in vivo and in vitro. In conclusion, this study demonstrates that the downregulation of SENP1 in DR leads to SUMO2/3-dependent activation of RUNX1. This activation promotes proliferation of mRMECs and exacerbates DR symptoms in mice.
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Affiliation(s)
- Wei Zhang
- Department of Ophthalmology, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, 030012, Shanxi, PR China; Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, PR China.
| | - Feng Li
- Central Laboratory, Shanxi Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University, Taiyuan, 030012, Shanxi, PR China
| | - Jiahui Hou
- Department of Clinical Medicine, Shanxi Medical University, Taiyuan, 030001, Shanxi, PR China
| | - Yan Cheng
- Department of Nuclear Medicine, First Hospital of Shanxi Medical University, Taiyuan, 030001, Shanxi, PR China
| | - Weiliang Zhang
- Department of Ophthalmology, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, 030012, Shanxi, PR China; Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, PR China
| | - Xing Liang
- Department of Ophthalmology, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, 030012, Shanxi, PR China; Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, PR China
| | - Jingjing Wang
- Department of Ophthalmology, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, 030012, Shanxi, PR China; Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, PR China
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Zhong L, Wu C, Liao L, Wu Y. Mycoplasma synoviae induce spleen tissue damage and inflammatory response of chicken through oxidative stress and apoptosis. Virulence 2023:2283895. [PMID: 37963095 DOI: 10.1080/21505594.2023.2283895] [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: 07/24/2023] [Accepted: 11/09/2023] [Indexed: 11/16/2023] Open
Abstract
Mycoplasma synovium (MS) is a prominent avian pathogen known to elicit robust inflammatory responses in birds while evading immune detection, often leading to chronic infection and immune compromise. The mechanisms underpinning MS-mediated splenic tissue damage in chickens, however, remain undefined. In our investigation with 7-day-old SPF chickens, we administered an MS-Y bacterial solution (200 µl, 1 × 109 CCU/ml) through eye and nose droplets, collecting spleen samples on days 3, 6, and 12 post-infection. Comprehensive analyses utilizing histopathology, electron microscopy, TUNEL assay, qRT-PCR, and western blot were employed. Results demonstrated that MS-infection downregulated T-SOD, GSH-PX, and CAT, while concurrently elevating iNOS, NO, and MDA levels. Evidently, MS-induced oxidative stress compromised the spleen's antioxidant defences. Histological examinations pinpointed splenic damage characterized by lymphocyte reduction and increased inflammatory cell infiltration. Ultrastructural observations revealed clear apoptotic markers, including mitochondrial perturbations and nuclear anomalies. Importantly, MS induced significant spleen tissue apoptosis, as supported by TUNEL assay outputs and gene expression profiles associated with apoptosis. Concurrently, we observed upregulated expressions of mRNAs and proteins affiliated with the NF-κB/MAPK signalling cascade (p < 0.05). Collectively, our data elucidate that MS infection induces splenic apoptosis and oxidative disturbances, perturbs tissue integrity, and potentiates the NF-κB/MAPK-mediated inflammatory cascade.
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Affiliation(s)
- Lemiao Zhong
- University Key Laboratory for Integrated ChineseTraditional and Western Veterinary Medicine and Animal Healthcare, Fuzhou, Fujian Province, China
- Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agriculture And Forestry University, Fuzhou, Fujian Province, China
| | - Chunlin Wu
- University Key Laboratory for Integrated ChineseTraditional and Western Veterinary Medicine and Animal Healthcare, Fuzhou, Fujian Province, China
- Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agriculture And Forestry University, Fuzhou, Fujian Province, China
| | - Lvyan Liao
- University Key Laboratory for Integrated ChineseTraditional and Western Veterinary Medicine and Animal Healthcare, Fuzhou, Fujian Province, China
- Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agriculture And Forestry University, Fuzhou, Fujian Province, China
| | - Yijian Wu
- University Key Laboratory for Integrated ChineseTraditional and Western Veterinary Medicine and Animal Healthcare, Fuzhou, Fujian Province, China
- Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agriculture And Forestry University, Fuzhou, Fujian Province, China
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The Role of Adaptive Immunity in Diabetic Retinopathy. J Clin Med 2022; 11:jcm11216499. [PMID: 36362727 PMCID: PMC9657718 DOI: 10.3390/jcm11216499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 10/29/2022] [Accepted: 10/31/2022] [Indexed: 11/06/2022] Open
Abstract
Diabetic retinopathy (DR) is currently one of the common causes of vision loss in working-age adults. It is clinically diagnosed and classified according to the vascular changes in the fundus. However, the activation of immune cells occurs before these vascular changes become detectable. These, together with molecular studies and the positive clinical outcomes of anti-inflammatory treatment, highlight the pivotal involvement of the immune system. The role of innate immunity in DR pathophysiology has been studied in depth, but the contribution of adaptive immunity remains largely elusive. This review aims to summarize our current understanding of the activation mechanism of adaptive immunity in DR microenvironments and to discuss the relationship between adaptive immunity and local vascular units or innate immunity, which opens new avenues for clinical applications in DR treatment.
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Cao X, Guo L, Zhou C, Huang C, Li G, Zhuang Y, Yang F, Liu P, Hu G, Gao X, Guo X. Effects of N-acetyl-l-cysteine on chronic heat stress-induced oxidative stress and inflammation in the ovaries of growing pullets. Poult Sci 2022; 102:102274. [PMID: 36402045 PMCID: PMC9673114 DOI: 10.1016/j.psj.2022.102274] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 10/08/2022] [Accepted: 10/15/2022] [Indexed: 11/05/2022] Open
Abstract
The aims of this study were to investigate the effects of supplemental N-acetyl-l-cysteine (NAC) on chronic heat stress-induced oxidative stress and inflammation in the ovaries of growing pullets. A total of 120, 12-wk-old, Hy-Line Brown hens were randomly separated into 4 groups with 6 replicates of 5 birds in each group for 21 d. The 4 treatments were as follows: the CON group and CN group were supplemented with basal diet or basal diet with 1 g/kg NAC, respectively; and the HS group and HSN group were heat-stressed groups supplemented with basal diet or basal diet with 1 g/kg NAC, respectively. The results indicated that the ovaries suffered pathological damage due to chronic heat stress and that NAC effectively ameliorated these changes. Compared with the HS group, antioxidant enzyme activities (including SOD, GSH-Px, CAT, and T-AOC) were enhanced, while the MDA contents and the expression levels of HSP70 were decreased in the HSN group. In addition, NAC upregulated the expression levels of HO-1, SOD2, and GST by upregulating the activity of Nrf2 at different time points to mitigate oxidative stress caused by heat exposure. Simultaneously, NAC attenuated chronic heat stress-induced NF-κB pathway activation and decreased the expression levels of the proinflammatory cytokines IL-8, IL-18, TNF-α, IKK-α, and IFN-γ. Cumulatively, our results indicated that NAC could ameliorate chronic heat stress-induced ovarian damage by upregulating the antioxidative capacity and reducing the secretion of proinflammatory cytokines.
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Xu W, Lu H, Yuan Y, Deng Z, Zheng L, Li H. The Antioxidant and Anti-Inflammatory Effects of Flavonoids from Propolis via Nrf2 and NF-κB Pathways. Foods 2022; 11:foods11162439. [PMID: 36010439 PMCID: PMC9407528 DOI: 10.3390/foods11162439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 08/01/2022] [Accepted: 08/07/2022] [Indexed: 11/16/2022] Open
Abstract
Accumulating evidence shows that oxidative stress and inflammation contribute to the development of cardiovascular disease. It has been suggested that propolis possesses antioxidant and anti-inflammatory activities. In this study, the antioxidant and anti-inflammatory effects of the main flavonoids of propolis (chrysin, pinocembrin, galangin, and pinobanksin) and propolis extract were researched. The results showed that the cellular ROS (Reactive oxygen species) levels, antioxidant enzymes, Nrf2 (Nuclear factor erythroid 2-related factor 2) nuclear translocation, and the expression of NQO1 (NAD(P)H:quinone oxidoreductase 1) and HO-1 (heme oxygenase 1) were regulated by different concentrations of individual flavonoids and propolis extract, which showed good antioxidant and pro-oxidant effects. For example, ROS levels were decreased; SOD and CAT activities were increased; and the expression of HO-1 protein was increased by chrysin. The results demonstrated that NO (Nitric Oxide), NOS (Nitric Oxide Synthase), and the activation of the NF-κB signaling pathway were inhibited in a dose-dependent manner by different concentrations of individual flavonoids and propolis extract. Moreover, the results revealed that the phytochemicals presented antioxidant effects at lower concentrations but pro-oxidant effects and stronger anti-inflammatory effects at higher concentrations. To maintain the balance of antioxidant and anti-inflammatory effects, it is possible that phytochemicals activate the Nrf2 pathway and inhibited the NF-κB (Nuclear factor kappa B) pathway.
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Affiliation(s)
- Wenzhen Xu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330031, China
| | - Han Lu
- Guiyang Center for Disease Control and Prevention, Guiyang 550018, China
| | - Yuan Yuan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330031, China
| | - Zeyuan Deng
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330031, China
- Institute for Advanced Study, Nanchang University, Nanchang 330031, China
| | - Liufeng Zheng
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330031, China
| | - Hongyan Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330031, China
- Correspondence: ; Tel.: +86-15979100756
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Dugbartey GJ, Alornyo KK, Diaba DE, Adams I. Activation of renal CSE/H 2S pathway by alpha-lipoic acid protects against histological and functional changes in the diabetic kidney. Biomed Pharmacother 2022; 153:113386. [PMID: 35834985 DOI: 10.1016/j.biopha.2022.113386] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/27/2022] [Accepted: 07/06/2022] [Indexed: 12/12/2022] Open
Abstract
INTRODUCTION We previously reported that alpha-lipoic acid (ALA) supplementation protects against progression of diabetic kidney disease (DKD). In this study, we aim to investigate whether the mechanism of renal protection by ALA involves renal cystathionine γ-lyase/hydrogen sulfide (CSE/H2S) system in type 2 diabetes mellitus (T2DM). METHODS Thirty-seven male Sprague-Dawley rats underwent 12 h of overnight fasting. To induce T2DM, 30 of these rats received intraperitoneal administration of nicotinamide (110 mg/kg) and streptozotocin (55 mg/kg). T2DM rats then received either oral administration of ALA (60 mg/kg/day) or intraperitoneal administration of 40 mg/kg/day DL-propargylglycine (PAG, a CSE inhibitor) or both for 6 weeks after which rats were sacrificed and samples collected for analysis. Untreated diabetic and non-diabetic rats served as diabetic and healthy controls respectively. RESULTS T2DM was characterized by reduced pancreatic β-cell function and hyperglycemia. Histologically, untreated diabetic rats showed significantly damaged pancreatic islets, glomerular and tubular injury, with elevated levels of renal function markers compared to healthy control rats (p < 0.001). These pathological changes worsened significantly following PAG administration (p < 0.05). While some renal protection was observed in ALA+PAG rats, ALA administration in untreated diabetic rats provided superior protection comparable to healthy control rats, with improved antioxidant status, lipid profile and reduced inflammation. Mechanistically, ALA significantly activated renal CSE/H2S system in diabetic rats, which was markedly suppressed in PAG-treated rats (p < 0.001). CONCLUSION Our data suggest that ALA protects against DKD development and progression by activating renal CSE/H2S pathway. Hence, CSE/H2S pathway may represent a therapeutic target in the treatment or prevention of DKD in diabetic patients.
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Affiliation(s)
- George J Dugbartey
- Department of Pharmacology and Toxicology, School of Pharmacy, College of Health Sciences, University of Ghana, Legon, Accra, Ghana.
| | - Karl K Alornyo
- Department of Pharmacology and Toxicology, School of Pharmacy, College of Health Sciences, University of Ghana, Legon, Accra, Ghana
| | - Deborah E Diaba
- Department of Pharmacology and Toxicology, School of Pharmacy, College of Health Sciences, University of Ghana, Legon, Accra, Ghana
| | - Ismaila Adams
- Department of Pharmacology and Toxicology, School of Pharmacy, College of Health Sciences, University of Ghana, Legon, Accra, Ghana
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Prandi FR, Lecis D, Illuminato F, Milite M, Celotto R, Lerakis S, Romeo F, Barillà F. Epigenetic Modifications and Non-Coding RNA in Diabetes-Mellitus-Induced Coronary Artery Disease: Pathophysiological Link and New Therapeutic Frontiers. Int J Mol Sci 2022; 23:4589. [PMID: 35562979 PMCID: PMC9105558 DOI: 10.3390/ijms23094589] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/18/2022] [Accepted: 04/20/2022] [Indexed: 12/21/2022] Open
Abstract
Diabetes mellitus (DM) is a glucose metabolism disorder characterized by chronic hyperglycemia resulting from a deficit of insulin production and/or action. DM affects more than 1 in 10 adults, and it is associated with an increased risk of cardiovascular morbidity and mortality. Cardiovascular disease (CVD) accounts for two thirds of the overall deaths in diabetic patients, with coronary artery disease (CAD) and ischemic cardiomyopathy as the main contributors. Hyperglycemic damage on vascular endothelial cells leading to endothelial dysfunction represents the main initiating factor in the pathogenesis of diabetic vascular complications; however, the underlying pathophysiological mechanisms are still not entirely understood. This review addresses the current knowledge on the pathophysiological links between DM and CAD with a focus on the role of epigenetic modifications, including DNA methylation, histone modifications and noncoding RNA control. Increased knowledge of epigenetic mechanisms has contributed to the development of new pharmacological treatments ("epidrugs") with epigenetic targets, although these approaches present several challenges. Specific epigenetic biomarkers may also be used to predict or detect the development and progression of diabetes complications. Further studies on diabetes and CAD epigenetics are needed in order to identify possible new therapeutic targets and advance personalized medicine with the prediction of individual drug responses and minimization of adverse effects.
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Affiliation(s)
- Francesca Romana Prandi
- Division of Cardiology, Department of Systems Medicine, Tor Vergata University, 00133 Rome, Italy; (D.L.); (F.I.); (M.M.); (R.C.); (F.B.)
- Department of Cardiology, Mount Sinai Hospital, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA;
| | - Dalgisio Lecis
- Division of Cardiology, Department of Systems Medicine, Tor Vergata University, 00133 Rome, Italy; (D.L.); (F.I.); (M.M.); (R.C.); (F.B.)
| | - Federica Illuminato
- Division of Cardiology, Department of Systems Medicine, Tor Vergata University, 00133 Rome, Italy; (D.L.); (F.I.); (M.M.); (R.C.); (F.B.)
| | - Marialucia Milite
- Division of Cardiology, Department of Systems Medicine, Tor Vergata University, 00133 Rome, Italy; (D.L.); (F.I.); (M.M.); (R.C.); (F.B.)
| | - Roberto Celotto
- Division of Cardiology, Department of Systems Medicine, Tor Vergata University, 00133 Rome, Italy; (D.L.); (F.I.); (M.M.); (R.C.); (F.B.)
| | - Stamatios Lerakis
- Department of Cardiology, Mount Sinai Hospital, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA;
| | - Francesco Romeo
- Department of Departmental Faculty of Medicine, Unicamillus-Saint Camillus International University of Health and Medical Sciences, 00131 Rome, Italy;
| | - Francesco Barillà
- Division of Cardiology, Department of Systems Medicine, Tor Vergata University, 00133 Rome, Italy; (D.L.); (F.I.); (M.M.); (R.C.); (F.B.)
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Liu P, Zhang J, Wang Y, Wang C, Qiu X, Chen DQ. Natural Products Against Renal Fibrosis via Modulation of SUMOylation. Front Pharmacol 2022; 13:800810. [PMID: 35308200 PMCID: PMC8931477 DOI: 10.3389/fphar.2022.800810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 02/08/2022] [Indexed: 12/29/2022] Open
Abstract
Renal fibrosis is the common and final pathological process of kidney diseases. As a dynamic and reversible post-translational modification, SUMOylation and deSUMOylation of transcriptional factors and key mediators significantly affect the development of renal fibrosis. Recent advances suggest that SUMOylation functions as the promising intervening target against renal fibrosis, and natural products prevent renal fibrosis via modulating SUMOylation. Here, we introduce the mechanism of SUMOylation in renal fibrosis and therapeutic effects of natural products. This process starts by summarizing the key mediators and enzymes during SUMOylation and deSUMOylation and its regulation role in transcriptional factors and key mediators in renal fibrosis, then linking the mechanism findings of SUMOylation and natural products to develop novel therapeutic candidates for treating renal fibrosis, and concludes by commenting on promising therapeutic targets and candidate natural products in renal fibrosis via modulating SUMOylation, which highlights modulating SUMOylation as a promising strategy for natural products against renal fibrosis.
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Affiliation(s)
- Peng Liu
- Shunyi Hospital, Beijing Hospital of Traditional Chinese Medicine, Beijing, China
| | - Jing Zhang
- Institute of Plant Resources, Yunnan University, Kunming, China
| | - Yun Wang
- Shunyi Hospital, Beijing Hospital of Traditional Chinese Medicine, Beijing, China
| | - Chen Wang
- Shunyi Hospital, Beijing Hospital of Traditional Chinese Medicine, Beijing, China
| | - Xinping Qiu
- Shunyi Hospital, Beijing Hospital of Traditional Chinese Medicine, Beijing, China
| | - Dan-Qian Chen
- Department of Emergency, China-Japan Friendship Hospital, Beijing, China
- *Correspondence: Dan-Qian Chen,
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11
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Li Y, Guo S, Yang F, Liu L, Chen Z. Huayu Tongluo Recipe Attenuates Renal Oxidative Stress and Inflammation through the Activation of AMPK/Nrf2 Signaling Pathway in Streptozotocin- (STZ-) Induced Diabetic Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2021; 2021:5873007. [PMID: 34367305 PMCID: PMC8337136 DOI: 10.1155/2021/5873007] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/07/2021] [Accepted: 07/20/2021] [Indexed: 12/12/2022]
Abstract
Diabetic nephropathy (DN), a severe microvascular complication of diabetes, is one of the leading causes of end-stage renal disease. Huayu Tongluo Recipe (HTR) has been widely used in the clinical treatment of DN in China, and its efficacy is reliable. This study aimed to explore the renoprotective effect of HTR and the underlying mechanism. Male Sprague-Dawley rats were fed with high sugar and fat diet combined with an intraperitoneal injection of STZ to establish the diabetic model. Rats in each group were respectively given drinking water, HTR, and irbesartan by gavage for 16 weeks. 24-hour urine samples were collected every 4 weeks to detect the content of total protein and 8-OHdG. Blood samples were taken to detect biochemical indicators and inflammatory markers at the end of 16th week. Renal tissue was collected to investigate pathological changes and to detect oxidative stress and inflammatory markers. AMPK/Nrf2 signaling pathway and fibrosis-related proteins were detected by immunohistochemistry, immunofluorescence, real-time PCR, and western blot. 24h urine total protein (24h UTP), serum creatinine (Scr), blood urea nitrogen (BUN), total cholesterol (TC), and triglyceride (TG) were decreased in the rats treated with HTR, while there was no noticeable change of blood glucose. HTR administration decreased malondialdehyde (MDA) content and increased superoxide dismutase (SOD) activity in kidneys, complying with reduced 8-OHdG in the urine. The levels of TNF-α, IL-1β, and MCP1 and the expression of nuclear NFκB were also lower after HTR treatment. Furthermore, HTR alleviated pathological renal injury and reduced the accumulation of extracellular matrix (ECM). Besides, HTR enhanced the AMPK/Nrf2 signaling and increased the expression of HO-1 while it inhibited the Nox4/TGF-β1 signaling in the kidneys of STZ-induced diabetic rats. HTR can inhibit renal oxidative stress and inflammation to reduce ECM accumulation and protect the kidney through activating the AMPK/Nrf2 signaling pathway in DN.
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Affiliation(s)
- Yachun Li
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Shuai Guo
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Fan Yang
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Lifei Liu
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China
| | - Zhiqiang Chen
- Hebei University of Chinese Medicine, Shijiazhuang 050091, China
- Hebei Hospital of Traditional Chinese Medicine, Shijiazhuang 050091, China
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12
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Effects of dietary carbohydrate sources on lipid metabolism and SUMOylation modification in the liver tissues of yellow catfish. Br J Nutr 2020; 124:1241-1250. [PMID: 32600495 DOI: 10.1017/s0007114520002408] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Dysregulation in hepatic lipid synthesis by excess dietary carbohydrate intake is often relevant with the occurrence of fatty liver; therefore, the thorough understanding of the regulation of lipid deposition and metabolism seems crucial to search for potential regulatory targets. In the present study, we examined TAG accumulation, lipid metabolism-related gene expression, the enzyme activities of lipogenesis-related enzymes, the protein levels of transcription factors or genes involving lipogenesis in the livers of yellow catfish fed five dietary carbohydrate sources, such as glucose, maize starch, sucrose, potato starch and dextrin, respectively. Generally speaking, compared with other carbohydrate sources, dietary glucose promoted TAG accumulation, up-regulated lipogenic enzyme activities and gene expressions, and down-regulated mRNA expression of genes involved in lipolysis and small ubiquitin-related modifier (SUMO) modification pathways. Further studies found that sterol regulatory element binding protein 1 (SREBP1), a key transcriptional factor relevant to lipogenic regulation, was modified by SUMO1. Mutational analyses found two important sites for SUMOylation modification (K254R and K264R) in SREBP1. Mutant SREBP lacking lysine 264 up-regulated the transactivation capacity on an SREBP-responsive promoter. Glucose reduced the SUMOylation level of SREBP1 and promoted the protein expression of SREBP1 and its target gene stearoyl-CoA desaturase 1 (SCD1), indicating that SUMOylation of SREBP1 mediated glucose-induced hepatic lipid metabolism. Our study elucidated the molecular mechanism of dietary glucose increasing hepatic lipid deposition and found that the SREBP-dependent transactivation was regulated by SUMO1 modification, which served as a new target for the transcriptional programmes governing lipid metabolism.
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Heras G, Namuduri AV, Traini L, Shevchenko G, Falk A, Bergström Lind S, Jia M, Tian G, Gastaldello S. Muscle RING-finger protein-1 (MuRF1) functions and cellular localization are regulated by SUMO1 post-translational modification. J Mol Cell Biol 2020; 11:356-370. [PMID: 29868881 PMCID: PMC7727263 DOI: 10.1093/jmcb/mjy036] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 05/25/2018] [Accepted: 06/01/2018] [Indexed: 01/02/2023] Open
Abstract
The muscle RING-finger protein-1 (MuRF1) is an E3 ubiquitin ligase expressed in skeletal and cardiac muscle tissues and it plays important roles in muscle remodeling. Upregulation of MuRF1 gene transcription participates in skeletal muscle atrophy, on contrary downregulation of protein expression leads to cardiac hypertrophy. MuRF1 gene point mutations have been found to generate protein aggregate myopathies defined as muscle disorder characterized by protein accumulation in muscle fibers. We have discovered that MuRF1 turned out to be also a target for a new post-translational modification arbitrated by conjugation of SUMO1 and it is mediated by the SUMO ligases E2 UBC9 and the E3 PIASγ/4. SUMOylation takes place at lysine 238 localized at the second coiled-coil protein domain that is required for efficient substrate interaction for polyubiquitination. We provided evidence that SUMOylation is essential for MuRF1 nuclear translocation and its mitochondria accumulation is enhanced in hyperglycemic conditions delivering a stabilization of the overall SUMOylated proteins in cultured myocytes. Thus, our findings add this SUMO1 post-translational modification as a new concept to understand muscle disorders related to the defect in MuRF1 activity.
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Affiliation(s)
- Gabriel Heras
- Department of Physiology and Pharmacology, Karolinska Institutet, Solnavägen 9, Quarter B5, Stockholm, Sweden
| | - Arvind Venkat Namuduri
- Department of Physiology and Pharmacology, Karolinska Institutet, Solnavägen 9, Quarter B5, Stockholm, Sweden
| | - Leonardo Traini
- Department of Physiology and Pharmacology, Karolinska Institutet, Solnavägen 9, Quarter B5, Stockholm, Sweden
| | - Ganna Shevchenko
- Department of Chemistry-BMC, Analytical Chemistry, Uppsala University, Uppsala, Sweden
| | - Alexander Falk
- Department of Chemistry-BMC, Analytical Chemistry, Uppsala University, Uppsala, Sweden
| | - Sara Bergström Lind
- Department of Chemistry-BMC, Analytical Chemistry, Uppsala University, Uppsala, Sweden
| | - Mi Jia
- Precision Medicine and Pharmacy Research Center, Binzhou Medical University, Yantai, China
| | - Geng Tian
- Precision Medicine and Pharmacy Research Center, Binzhou Medical University, Yantai, China
| | - Stefano Gastaldello
- Department of Physiology and Pharmacology, Karolinska Institutet, Solnavägen 9, Quarter B5, Stockholm, Sweden.,Precision Medicine and Pharmacy Research Center, Binzhou Medical University, Yantai, China
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14
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Hu X, Zhang H, Zhuang L, Jin G, Yang Q, Li M, Sun W, Chen F. Ubiquitin-Fold Modifier-1 Participates in the Diabetic Inflammatory Response by Regulating NF-κB p65 Nuclear Translocation and the Ubiquitination and Degradation of IκBα. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:795-810. [PMID: 32158197 PMCID: PMC7049273 DOI: 10.2147/dddt.s238695] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 01/29/2020] [Indexed: 12/16/2022]
Abstract
Background Ubiquitin-fold modifier-1 (Ufm1) is a recently identified ubiquitin-like protein. We previously confirmed that Ufm1 expression was increased in diabetic mice. However, its role in the development of diabetes remains undefined. Methods Lentivirus-mediated gene knockdown and overexpression techniques were used to observe the effect of Ufm1 on the expression of inflammatory factors, adhesion molecules and chemokines, as well as the transcriptional activity of nuclear factor kappa-B (NF-κB) in macrophages. Western blot and immunofluorescence analyses were used to analyse the mechanism by which Ufm1 affects the transcriptional activity of NF-κB. Finally, the effects of Ufm1 on inflammation and pancreatic, renal and myocardial damage were observed in db/db mice. Results Knockdown of Ufm1 by lentivirus shRNA targeting Ufm1 (Lv-shUfm1) led to decreased secretion of IL-6, IL-1β, ICAM-1, VCAM-1, MCP-1 and CXCL2 in RAW264.7 cells that were exposed to LPS and TNF-α, while lentiviral overexpression of Ufm1 (Lv-Ufm1) caused the opposite effect. Interestingly, further investigation indicated that Ufm1 induced NF-κB p65 nuclear translocation in RAW264.7 cells via increasing the ubiquitination and degradation of IκBα. In an in vivo experiment, pretreatment of db/db mice with Lv-shUfm1 reduced the mRNA levels of TNF-α, IL-6, IL-1β, ICAM-1, VCAM-1, MCP-1 and CXCL2 in resident peritoneal macrophages (RPMs) and decreased the plasma levels of TNF-α, IL-6, IL-1β, ICAM-1, VCAM-1, MCP-1 and CXCL2. Additionally, in Lv-Ufm1-treated mice, the inverse results were observed. Following treatment with Lv-shUfm1 and Lv-Ufm1, NF-κB p65 nuclear translocation in RPMs was decreased and increased, respectively. Importantly, we observed that Lv-shUfm1 injection led to a decrease in plasma glycaemia, a reduction in urinary albuminuria and cardiomyocyte hypertrophy and an improvement in the histopathological appearance of pancreatic, kidney and myocardial tissue. Pretreatment of the mice with Lv-shUfm1 inhibited macrophage infiltration in the pancreas, kidney and myocardial tissue. Conclusion Our data elucidate a new biological function of Ufm1 that mediates inflammatory responses. Ufm1-mediated p65 nuclear translocation occurs by modulating the ubiquitination and degradation of IκBα. Moreover, downregulating Ufm1 is an effective strategy to prevent the development of type 2 diabetes and its complications.
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Affiliation(s)
- Xiaolei Hu
- Department of Endocrinology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233004, People's Republic of China
| | - Hengyan Zhang
- Department of Endocrinology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233004, People's Republic of China
| | - Langen Zhuang
- Department of Endocrinology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233004, People's Republic of China
| | - Guoxi Jin
- Department of Endocrinology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233004, People's Republic of China
| | - Qingqing Yang
- Department of Endocrinology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233004, People's Republic of China
| | - Min Li
- Department of Endocrinology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233004, People's Republic of China
| | - Weihua Sun
- Department of Endocrinology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233004, People's Republic of China
| | - Fengling Chen
- Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, People's Republic of China
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Xing C, Wang Y, Dai X, Yang F, Luo J, Liu P, Zhang C, Cao H, Hu G. The protective effects of resveratrol on antioxidant function and the mRNA expression of inflammatory cytokines in the ovaries of hens with fatty liver hemorrhagic syndrome. Poult Sci 2019; 99:1019-1027. [PMID: 32036959 PMCID: PMC7587695 DOI: 10.1016/j.psj.2019.10.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 08/29/2019] [Accepted: 10/11/2019] [Indexed: 01/12/2023] Open
Abstract
To investigate the etiopathogenesis of fatty liver hemorrhagic syndrome (FLHS) and the protective effects of resveratrol (RSV) against FLHS in laying hens, 144 healthy 90-day-old laying hens were randomly divided into 4 groups including control (Con) group, high-energy low-protein (HELP) group, RSV group, and HELP + RSV group, each of which contained 36 hens with 3 replicates. Birds in the 4 groups were fed a basal diet, HELP diet, basal diet supplemented with 400 mg/kg RSV, and HELP diet supplemented with 400 mg/kg RSV. The histopathology of the ovary lesions on day 120, egg production, antioxidative function, and mRNA expression levels of inflammatory cytokines on days 40, 80, and 120 were determined. The lipid accumulation and hemorrhaging were more severe in the HELP group than those in the HELP + RSV group. The laying rate was markedly decreased in the HELP group compared with that in the Con and HELP + RSV groups. Furthermore, the malondialdehyde concentration was significantly increased (P < 0.05), while the levels of superoxide dismutase (SOD), catalase, and glutathione were significantly decreased (P < 0.05) in the HELP group compared with those in the Con and HELP + RSV groups. The mRNA levels of antioxidant genes (Nrf2, SOD-1, and HO-1) were markedly increased (P < 0.05) in the HELP + RSV group compared with those in the HELP group. In addition, the mRNA levels of inflammation-related genes (nuclear factor kappa B, tumor necrosis factor-α, IL-1β, and IL-6) were significantly increased (P < 0.05) in the HELP group compared with those in the Con and HELP + RSV groups. Collectively, these results indicate that oxidative stress and inflammation are involved in the occurrence and development of FLHS in the ovaries of laying hens, but RSV effectively attenuates oxidative stress and inflammation in hens with FLHS. Hence, RSV can be used as an effective feed additive to protect against FLHS.
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Affiliation(s)
- Chenghong Xing
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, P. R. China
| | - Yun Wang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, P. R. China
| | - Xueyan Dai
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, P. R. China
| | - Fan Yang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, P. R. China
| | - Junrong Luo
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, P. R. China
| | - Ping Liu
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, P. R. China
| | - Caiying Zhang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, P. R. China
| | - Huabin Cao
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, P. R. China.
| | - Guoliang Hu
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang 330045, Jiangxi, P. R. China.
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16
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El-Shitany NA, Eid BG. Icariin modulates carrageenan-induced acute inflammation through HO-1/Nrf2 and NF-kB signaling pathways. Biomed Pharmacother 2019; 120:109567. [DOI: 10.1016/j.biopha.2019.109567] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 10/17/2019] [Accepted: 10/20/2019] [Indexed: 12/13/2022] Open
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17
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Han X, Dong XX, Shi MY, Feng L, Wang XL, Zhang JS, Yan QC. SUMOylation and deacetylation affect NF-κB p65 activity induced by high glucose in human lens epithelial cells. Int J Ophthalmol 2019; 12:1371-1379. [PMID: 31544029 DOI: 10.18240/ijo.2019.09.01] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Accepted: 05/07/2019] [Indexed: 12/11/2022] Open
Abstract
AIM To explore the effects of IκBα SUMOylation and NF-κB p65 deacetylation on NF-κB p65 activity induced by high glucose in cultured human lens epithelial cells (HLECs). METHODS HLECs (SRA01/04) were cultured with 5.5, 25, and 50 mmol/L glucose media for 24h, and with 50 mmol/L glucose media for 0, 12, and 24h respectively. SUMO1 and SIRT1 expressions were detected by reverse transcription-polymerase chain reaction (RT-PCR) and Western blot (WB). IκBα and NF-κB p65 expressions were detected by WB. With NAC, DTT, MG132 or Resveratrol (RSV) treatment, SUMO1 and SIRT1 expressions were detected by WB. Protein expression localizations were examined by immunofluorescence and co-immunofluorescence. The effects of SUMO1 or SIRT1 overexpression, as well as MG132 and RSV, on the nuclear expression and activity of IκBα and NF-κB p65 were analyzed by immunoblot and dual luciferase reporter gene assay. RESULTS SUMO1 and SIRT1 expressions were influenced by high glucose in mRNA and protein levels, which could be blocked by NAC or DTT. SUMO1 was down-regulated by using MG132, and SIRT1 was up-regulated under RSV treatment. IκBα nuclear expression was attenuated and NF-κB p65 was opposite under high glucose, while IκBα and NF-κB p65 location was transferred to the nucleus. SUMO1 or SIRT1 overexpression and MG132 or RSV treatment affected the nuclear expression and activity of IκBα and NF-κB p65 under high glucose condition. CONCLUSION IκBα SUMOylation and NF-κB p65 deacetylation affect NF-κB p65 activity in cultured HLECs under high glucose, and presumably play a significant role in controlling diabetic cataract.
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Affiliation(s)
- Xiao Han
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province; Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Xiao-Xuan Dong
- Department of Ophthalmology, the Fourth People's Hospital of Shenyang, Shenyang 110031, Liaoning Province, China
| | - Ming-Yu Shi
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province; Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Li Feng
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province; Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Xin-Ling Wang
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province; Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Jin-Song Zhang
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province; Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
| | - Qi-Chang Yan
- Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University; Key Laboratory of Lens Research of Liaoning Province; Eye Hospital of China Medical University, Shenyang 110005, Liaoning Province, China
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Abstract
Objective: Small ubiquitin-related modifiers (SUMOs) are a group of post-translational modification proteins extensively expressed in eukaryotes. Abnormal SUMOylation can lead to the development of various diseases. This article summarizes the progress on research of the role of SUMOs in various types of kidney diseases to further increase the understanding of the regulatory functions of SUMOylation in the pathogenesis of kidney diseases. Data sources: This review was based on articles published in the PubMed databases up to January 2018, using the keywords including “SUMOs,” “SUMOylation,” and “kidney diseases.” Study selection: Original articles and critical reviews about SUMOs and kidney disease were selected for this review. A total of 50 studies were in English. Results: SUMO participates in the activation of NF-κB inflammatory signaling pathway, playing a central regulatory role in the inflammation and progression of DN, and the secretion of various chemokines in AKI. SUMO involves in the regulation of TG2 and Nrf2 antioxidant stress, affecting renal tubular injury in AKI. SUMO affects the MAPK/ERK pathway, regulating intracellular signal transduction, modulating the transcription and expression of effector molecules in DN. SUMO contributes to the TGF-β/Smad pathway, leading to fibrosis of the kidney. The conjugate combination of SUMO and p53 regulates cell proliferation and apoptosis, and participates in the regulation of tumorigenesis. In addition, SUMOylation of MITF modulates renal tumors secondary to melanoma, Similarly, SUMOylation of tumor suppressor gene VHL regulates the occurrence of renal cell carcinoma in VHL syndrome. Conclusions: Tissue injury, inflammatory responses, fibrosis, apoptosis, and tumor proliferation in kidney diseases all involve SUMOs. Further research of the substrate SUMOylation and regulatory mechanisms of SUMO in kidney diseases will improve and develop new treatment measures and strategies targeting kidney diseases.
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Yi J, Gao ZF. MicroRNA-9-5p promotes angiogenesis but inhibits apoptosis and inflammation of high glucose-induced injury in human umbilical vascular endothelial cells by targeting CXCR4. Int J Biol Macromol 2019; 130:1-9. [PMID: 30716366 DOI: 10.1016/j.ijbiomac.2019.02.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/31/2019] [Accepted: 02/01/2019] [Indexed: 02/08/2023]
Abstract
High glucose (HG) has the potential to cause vascular endothelial cell injury, while microRNAs (miRNAs) play a key role in treating endothelial cell injury. CXC chemokine receptor-4 (CXCR4) is reported to be expressed in vascular endothelial cells. Hence, this study investigated role of miR-9-5p in the angiogenesis and apoptosis of HG-induced human umbilical vascular endothelial cells (HUVECs) injury. Dual luciferase reporter gene assay verified that miR-9-5p targeted CXCR4. RT-qPCR and western blot analysis revealed that miR-9-5p was down-regulated, meanwhile CXCR4 was up-regulated in the HG-induced HUVECs. HUVECs were cultured in 30 mmol/L HG in vitro, and then transfected with miR-9-5p mimic or CXCR4 siRNA to identify the effect of miR-9-5p on cell activity, angiogenesis, apoptosis, and inflammation of HG-induced HUVECs. The results suggested that overexpression of miR-9-5p or silencing of CXCR4 in HG-induced HUVECs increased cell proliferation and tubule length, while decreasing the apoptosis rate and the expression of inflammatory factors. Furthermore, miR-9-5p inhibited the phosphorylation of extracellular regulated protein kinases (ERK), protein kinase B (AKT), and Mammalian Target of Rapamycin (mTOR) proteins via downregulation of CXCR4. Therefore, overexpression of miR-9-5p suppressed the mitogen-activated protein kinase (MAPK)/ERK and the PI3K/AKT/mTOR pathway by inhibiting CXCR4, thereby reducing HG-induced injury in HUVECs.
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Affiliation(s)
- Jun Yi
- Department of Anesthesiology, Beijing Jishuitan Hospital, Beijing 100035, PR China
| | - Zhi-Feng Gao
- Department of Anesthesiology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 102218, PR China.
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Yuan T, Yang T, Chen H, Fu D, Hu Y, Wang J, Yuan Q, Yu H, Xu W, Xie X. New insights into oxidative stress and inflammation during diabetes mellitus-accelerated atherosclerosis. Redox Biol 2019; 20:247-260. [PMID: 30384259 PMCID: PMC6205410 DOI: 10.1016/j.redox.2018.09.025] [Citation(s) in RCA: 372] [Impact Index Per Article: 74.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/12/2018] [Accepted: 09/29/2018] [Indexed: 02/06/2023] Open
Abstract
Oxidative stress and inflammation interact in the development of diabetic atherosclerosis. Intracellular hyperglycemia promotes production of mitochondrial reactive oxygen species (ROS), increased formation of intracellular advanced glycation end-products, activation of protein kinase C, and increased polyol pathway flux. ROS directly increase the expression of inflammatory and adhesion factors, formation of oxidized-low density lipoprotein, and insulin resistance. They activate the ubiquitin pathway, inhibit the activation of AMP-protein kinase and adiponectin, decrease endothelial nitric oxide synthase activity, all of which accelerate atherosclerosis. Changes in the composition of the gut microbiota and changes in microRNA expression that influence the regulation of target genes that occur in diabetes interact with increased ROS and inflammation to promote atherosclerosis. This review highlights the consequences of the sustained increase of ROS production and inflammation that influence the acceleration of atherosclerosis by diabetes. The potential contributions of changes in the gut microbiota and microRNA expression are discussed.
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Affiliation(s)
- Ting Yuan
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Ting Yang
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Huan Chen
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China.
| | - Danli Fu
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Yangyang Hu
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Jing Wang
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Qing Yuan
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Hong Yu
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Wenfeng Xu
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Xiang Xie
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China.
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AICAR-Induced AMPK Activation Inhibits the Noncanonical NF-κB Pathway to Attenuate Liver Injury and Fibrosis in BDL Rats. Can J Gastroenterol Hepatol 2018; 2018:6181432. [PMID: 30662889 PMCID: PMC6314002 DOI: 10.1155/2018/6181432] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 11/17/2018] [Accepted: 11/29/2018] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND To evaluate the AMP-activated protein kinase- (AMPK-) mediated signaling and NF-κB-related inflammatory pathways that contribute to cholestatic diseases in the bile duct ligation (BDL) rat model of chronic cholestasis and verify the protective role of 5-Aminoimidazole-4-carboxamide1-β-D-ribofuranoside (AICAR) against hepatic injury and fibrosis triggered by cholestasis-related inflammation. METHODS Animals were randomly divided into three groups: sham-operated group, BDL group, and BDL+ AICAR group. Cholestatic liver injury was induced by common BDL. Two weeks later, rats in BDL+AICAR group started receiving AICAR treatment. Hepatic pathology was examined by haematoxylin and eosin (H&E) and sirius red staining and hydroxyproline assay was performed in evaluating the severity of hepatic cirrhosis. Real-time PCR and Western blot were performed for RNA gene expression of RNA and protein levels, respectively. RESULTS The BDL group showed liver injury as evidenced by histological changes and elevation in serum biochemicals, ductular reaction, fibrosis, and inflammation. The mRNA expression of canonical NF-κB inflammatory cytokines such as TNF-α, IL-1β, TGF-β, and the protein of noncanonical NF-κB, P100, and P52 was upregulated in the livers of BDL rats. The BDL rats with the administration of AICAR could induce AMPK activation inhibiting the noncanonical NF-κB pathway to attenuate liver injury and fibrosis in BDL rats. CONCLUSION The BDL model of hepatic cholestatic injury resulting in activation of Kupffer cells and recruitment of immune cells might initiate an inflammatory response through activation of the NF-κB pathway. The AMPK activator AICAR significantly alleviated BDL-induced inflammation in rats by mainly inhibiting the noncanonical NF-κB pathway and thus protecting against hepatic injury and fibrosis triggered by BDL.
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Yang Z, Zhang Y, Sun S. Deciphering the SUMO code in the kidney. J Cell Mol Med 2018; 23:711-719. [PMID: 30506859 PMCID: PMC6349152 DOI: 10.1111/jcmm.14021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 10/08/2018] [Accepted: 10/20/2018] [Indexed: 01/18/2023] Open
Abstract
SUMOylation of proteins is an important regulatory element in modulating protein function and has been implicated in the pathogenesis of numerous human diseases such as cancers, neurodegenerative diseases, brain injuries, diabetes, and familial dilated cardiomyopathy. Growing evidence has pointed to a significant role of SUMO in kidney diseases such as DN, RCC, nephritis, AKI, hypertonic stress and nephrolithiasis. Recently, emerging studies in podocytes demonstrated that SUMO might have a protective role against podocyte apoptosis. However, the SUMO code responsible for beneficial outcome in the kidney remains to be decrypted. Our recent experiments have revealed that the expression of both SUMO and SUMOylated proteins is appreciably elevated in hypoxia‐induced tubular epithelial cells (TECs) as well as in the unilateral ureteric obstruction (UUO) mouse model, suggesting a role of SUMO in TECs injury and renal fibrosis. In this review, we attempt to decipher the SUMO code in the development of kidney diseases by summarizing the defined function of SUMO and looking forward to the potential role of SUMO in kidney diseases, especially in the pathology of renal fibrosis and CKD, with the goal of developing strategies that maximize correct interpretation in clinical therapy and prognosis.
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Affiliation(s)
- Zhen Yang
- Department of Nephrology, The First Affiliated Hospital of Air Force Medical University, Xi'an, Shaanxi, China
| | - Yuming Zhang
- Department of Nephrology, The First Affiliated Hospital of Air Force Medical University, Xi'an, Shaanxi, China
| | - Shiren Sun
- Department of Nephrology, The First Affiliated Hospital of Air Force Medical University, Xi'an, Shaanxi, China
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Yang SB, Tan XY, Zhang DG, Cheng J, Luo Z. Identification of 10 SUMOylation-Related Genes From Yellow Catfish Pelteobagrus fulvidraco, and Their Transcriptional Responses to Carbohydrate Addition in vivo and in vitro. Front Physiol 2018; 9:1544. [PMID: 30467482 PMCID: PMC6235910 DOI: 10.3389/fphys.2018.01544] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 10/15/2018] [Indexed: 12/17/2022] Open
Abstract
SUMOylation is a kind of important post-translational modification. In the present study, we identified 10 key genes involved in SUMOylation and deSUMOylation (sumo1, sumo2, sumo3, sae1, uba2, ubc9, pias1, senp1, senp2, and senp3) in yellow catfish Pelteobagrus fulvidraco, investigated their tissue expression patterns and transcriptional responses to carbohydrate addition both in vivo and in vitro. All of these members shared similar domains to their orthologous genes of other vertebrates. Their mRNAs were widely expressed in all the tested tissues, but at variable levels. Dietary carbohydrate levels differentially influenced the mRNA levels of these genes in liver, muscle, testis, and ovary of yellow catfish. Their mRNA levels in primary hepatocytes were differentially responsive to glucose addition. Our study would contribute to our understanding into the molecular basis of SUMOylation modification and into the potential SUMOylation function in the carbohydrate utilization in fish.
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Affiliation(s)
- Shui-Bo Yang
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Fishery College, Huazhong Agricultural University, Wuhan, China
| | - Xiao-Ying Tan
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Fishery College, Huazhong Agricultural University, Wuhan, China
| | - Dian-Guang Zhang
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Fishery College, Huazhong Agricultural University, Wuhan, China
| | - Jie Cheng
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Fishery College, Huazhong Agricultural University, Wuhan, China
| | - Zhi Luo
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Fishery College, Huazhong Agricultural University, Wuhan, China.,Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Changde, China
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Inhibitive Effect of Resveratrol on the Inflammation in Cultured Astrocytes and Microglia Induced by Aβ1–42. Neuroscience 2018; 379:390-404. [DOI: 10.1016/j.neuroscience.2018.03.047] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 02/17/2018] [Accepted: 03/28/2018] [Indexed: 12/30/2022]
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Chlorogenic acid prevents diabetic nephropathy by inhibiting oxidative stress and inflammation through modulation of the Nrf2/HO-1 and NF-ĸB pathways. Int Immunopharmacol 2018; 54:245-253. [DOI: 10.1016/j.intimp.2017.11.021] [Citation(s) in RCA: 148] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 10/30/2017] [Accepted: 11/14/2017] [Indexed: 01/06/2023]
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CYLD Deubiquitinase Negatively Regulates High Glucose-Induced NF- κB Inflammatory Signaling in Mesangial Cells. BIOMED RESEARCH INTERNATIONAL 2017; 2017:3982906. [PMID: 29259980 PMCID: PMC5702419 DOI: 10.1155/2017/3982906] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 10/12/2017] [Accepted: 10/22/2017] [Indexed: 01/10/2023]
Abstract
Nuclear factor-kappa B (NF-κB) is the key part of multiple signal transduction of inflammation in the pathogenesis of diabetic nephropathy (DN). The ubiquitin-proteasome system is extensively involved in the regulation of the NF-κB pathway. Cylindromatosis (CYLD) has deubiquitinase activity and acts as a negative regulator of the NF-κB signaling pathway. However, the association between CYLD and NF-κB inflammatory signaling in DN is unclear. In the present study, mouse glomerular mesangial cells (GMCs) and rat GMCs were stimulated by elevated concentrations of glucose (10, 20, and 30 mmol/L high glucose) or mannitol as the osmotic pressure control. CYLD was overexpressed or suppressed by transfection with a CYLD expressing vector or CYLD-specific siRNA, respectively. Our data showed that high glucose significantly inhibited the protein and mRNA expression of CYLD in a dose- and time-dependent manner (both p < 0.05). siRNA-mediated knockdown CYLD facilitated the high glucose-induced activation of NF-κB signaling and triggered the release of MCP-1, IL-6, and IL-8 (all p < 0.05). However, these high glucose-mediated effects were blunted by overexpression of CYLD (p < 0.05). The present results support the involvement of CYLD in the regulation of NF-κB inflammatory signaling induced by elevated glucose, implicating CYLD as a potential therapeutic target of DN.
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Tan F, Dong W, Lei X, Liu X, Li Q, Kang L, Zhao S, Zhang C. Attenuated SUMOylation of sirtuin 1 in premature neonates with bronchopulmonary dysplasia. Mol Med Rep 2017; 17:1283-1288. [PMID: 29115559 DOI: 10.3892/mmr.2017.8012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 09/09/2017] [Indexed: 11/06/2022] Open
Abstract
A prospective study was performed to investigate the effects of hyperoxia on the expression of small ubiquitin‑related modifier (SUMO) and sirtuin 1 (SIRT1) proteins, and to examine interactions between these proteins in premature neonates with bronchopulmonary dysplasia (BPD). Peripheral blood mononuclear cells (PBMCs) were isolated from residual venous blood samples of 20 premature infants with BPD and 20 gender‑matched premature infants without BPD (non‑BPD group). Expression levels of SUMO and SIRT1 proteins in PBMCs were assessed by western blot analysis, and their interactions in PBMCs were detected using the immunoprecipitation assay. Based on the fraction of inspired oxygen (FiO2) administered, neonates were divided into normoxia, low‑(21%<FiO2<30%), medium‑(30%≤FiO2<40%) and high‑oxygen (FiO2≥40%) groups. Expression levels of SUMO1 and SUMO2/3 proteins in the normoxia group were significantly lower than those in the medium‑ or high‑oxygen groups (P<0.01), but were comparable to those in the low‑oxygen group. SIRT1 expression levels in both the medium‑ and high‑oxygen groups were significantly lower than those in the normoxia group (P<0.01). In the BPD group, the expression of SIRT1 protein was significantly lower (P<0.01), and its interaction with SUMO1 and SUMO2/3 was significantly attenuated compared with that in the non‑BPD group (P<0.01). Supplemental oxygen with FiO2≥30% was associated with upregulation of SUMO1 and SUMO2/3 expression and downregulation of SIRT1 expression. The present findings suggest that decreased SIRT1 expression and its SUMOylation by SUMO1 and SUMO2/3 may be associated with the development of BPD.
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Affiliation(s)
- Fengmei Tan
- Department of Neonatology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Wenbin Dong
- Department of Neonatology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Xiaoping Lei
- Department of Neonatology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Xingling Liu
- Department of Neonatology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Qingping Li
- Department of Neonatology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Lan Kang
- Department of Neonatology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Shuai Zhao
- Department of Neonatology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Chan Zhang
- Department of Neonatology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
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Abstract
Protein modification with the small ubiquitin-related modifier (SUMO) can affect protein function, enzyme activity, protein-protein interactions, protein stability, protein targeting and cellular localization. SUMO influences the function and regulation of metabolic enzymes within pathways, and in some cases targets entire metabolic pathways by affecting the activity of transcription factors or by facilitating the translocation of entire metabolic pathways to subcellular compartments. SUMO modification is also a key component of nutrient- and metabolic-sensing mechanisms that regulate cellular metabolism. In addition to its established roles in maintaining metabolic homeostasis, there is increasing evidence that SUMO is a key factor in facilitating cellular stress responses through the regulation and/or adaptation of the most fundamental metabolic processes, including energy and nucleotide metabolism. This review focuses on the role of SUMO in cellular metabolism and metabolic disease.
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SUMO E3 Ligase PIASy Mediates High Glucose-Induced Activation of NF- κB Inflammatory Signaling in Rat Mesangial Cells. Mediators Inflamm 2017; 2017:1685194. [PMID: 29038616 PMCID: PMC5605875 DOI: 10.1155/2017/1685194] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 06/18/2017] [Accepted: 07/17/2017] [Indexed: 11/17/2022] Open
Abstract
Background Sumoylation is extensively involved in the regulation of NF-κB signaling. PIASy, as a SUMO E3 ligase, has been proved to mediate sumoylation of IκB kinase γ (IKKγ) and contribute to the activation of NF-κB under genotoxic agent stimulation. However, the association of PIASy and NF-κB signaling in the pathogenesis of diabetic nephropathy (DN) has not been defined. Methods Rat glomerular mesangial cells (GMCs) were stimulated by high glucose; siRNA was constructed to silence the expression of PIASy; the expression of PIASy, SUMO isoforms (SUMO1, SUMO2/3), and NF-κB signaling components was analyzed by Western blot; the interaction between IKKγ and SUMO proteins was detected by coimmunoprecipitation; and the release of inflammatory cytokines MCP-1 and IL-6 was assayed by ELISA. Results High glucose significantly upregulated the expression of PIASy, SUMO1, and SUMO2/3 in a dose- and time-dependent manner (P < 0.05), induced the phosphorylation and sumoylation of IKKγ (P < 0.05), and then triggered NF-κB signaling whereas MCP-1 and IL-6 were released from GMCs (P < 0.05). Moreover, these high glucose-induced effects were observably reversed by siRNA-mediated knockdown of PIASy (P < 0.05). Conclusion The SUMO E3 ligase PIASy mediates high glucose-induced activation of NF-κB inflammatory signaling, suggesting that PIASy may be a potential therapeutic target of DN.
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Dugbartey GJ. Diabetic nephropathy: A potential savior with 'rotten-egg' smell. Pharmacol Rep 2016; 69:331-339. [PMID: 28183033 DOI: 10.1016/j.pharep.2016.11.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 10/20/2016] [Accepted: 11/09/2016] [Indexed: 02/06/2023]
Abstract
Diabetic nephropathy (DN) is currently the leading cause of end-stage renal disease. Despite optimal management, DN is still a major contributor to morbidity and mortality of diabetic patients worldwide. The major pathological alterations in DN include excessive accumulation and deposition of extracellular matrix, leading to expansion of mesangial matrix, thickening of glomerular basement membrane and tubulointerstitial fibrosis. At the molecular level, accumulating evidence suggests that hyperglycemia or high glucose mediates renal injury in DN via multiple molecular mechanisms such as induction of oxidative stress, upregulation of renal transforming growth factor beta-1 expression, production of proinflammatory cytokines, activation of fibroblasts and renin angiotensin system, and depletion of adenosine triphosphate. Also worrying is the fact that existing therapies only retard the disease progression but do not prevent it. Therefore, there is urgent need to identify novel therapies to target additional disease mechanisms. Hydrogen sulfide (H2S), the third member of the gasotransmitter family, has recently been identified and demonstrated to possess important therapeutic characteristics that prevent the development and progression of DN in experimental animals by targeting several important molecular pathways, and therefore may represent an alternative or additional therapeutic approach for DN. This review discusses recent experimental findings on the molecular mechanisms underlying the therapeutic effects of H2S against the development and progression of DN and its clinical application in the future.
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Affiliation(s)
- George J Dugbartey
- Department of Medicine, Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA.
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31
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Qiu YY, Tang LQ. Roles of the NLRP3 inflammasome in the pathogenesis of diabetic nephropathy. Pharmacol Res 2016; 114:251-264. [PMID: 27826011 DOI: 10.1016/j.phrs.2016.11.004] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 10/10/2016] [Accepted: 11/03/2016] [Indexed: 12/22/2022]
Abstract
Diabetic nephropathy (DN) is a serious complication of diabetes mellitus, and persistent inflammation in circulatory and renal tissues is an important pathophysiological basis for DN. The essence of the microinflammatory state is the innate immune response, which is central to the occurrence and development of DN. Members of the inflammasome family, including both "receptors" and "regulators", are key to the inflammatory immune response. Nucleotide binding and oligomerization domain-like receptor family pyrin domain-containing 3 (NLRP3) and other inflammasome components are able to detect endogenous danger signals, resulting in activation of caspase-1 as well as interleukin (IL)-1β, IL-18 and other cytokines; these events stimulate the inflammatory cascade reaction, which is crucial for DN. Hyperglycaemia, hyperlipidaemia and hyperuricaemia can activate the NLRP3 inflammasome, which then mediates the occurrence and development of DN through the K+ channel model, the lysosomal damage model and the active oxygen cluster model. In this review, we survey the involvement of the NLRP3 inflammasome in various signalling pathways and highlight different aspects of their influence on DN. We also explore the important effects of the NLRP3 inflammasome on kidney function and structural changes that occur during DN development and progression. It is becoming more evident that NLRP3 inflammasome targeting has therapeutic potential for the treatment of DN.
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Affiliation(s)
- Yuan-Ye Qiu
- Anhui Provincial Hospital, Anhui Medical University, 17# Lu-jiang Road, Hefei 230001, Anhui, China.
| | - Li-Qin Tang
- Anhui Provincial Hospital, Anhui Medical University, 17# Lu-jiang Road, Hefei 230001, Anhui, China.
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Pandey A, Goru SK, Kadakol A, Malek V, Sharma N, Gaikwad AB. H2AK119 monoubiquitination regulates Angiotensin II receptor mediated macrophage infiltration and renal fibrosis in type 2 diabetic rats. Biochimie 2016; 131:68-76. [PMID: 27693081 DOI: 10.1016/j.biochi.2016.09.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 09/25/2016] [Indexed: 12/11/2022]
Abstract
Monocyte chemoattractant protein (MCP-1) and transforming growth factor-β (TGF-β1)-markers of inflammation and fibrosis, are central to type 2 diabetic nephropathy (T2DN) progression. The epigenetic basis of their expression has also been explored to certain extent. H2A lysine 119 monoubiquitination (H2AK119Ub), a repressive chromatin mark regulates progression of hyperglycaemia induced fibrosis in glomerular mesangial cells. However, how H2AK119Ub affects the expression of MCP-1 and TGF-β1 and their regulation by Angiotensin II receptor subtypes remains unknown. In the current study, we aimed to study the effect of Angiotensin II receptors' blockade on the macrophage infiltration and histone modifications occurring at the promoter region of Mcp1 and Tgfb1in high fat diet fed and low dose streptozotocin treated male Wistar rats. Hereby, we present the first report delineating a distinct link between H2AK119Ub and macrophage infiltration and fibrosis i.e. the enrichment of H2AUb at Mcp1 and Tgfb1 promoter region was found to reduce drastically in the T2DN which could be significantly reversed by Telmisartan and was further elevated by PD123319. We could conclude that the Angiotensin II mediated macrophage infiltration in T2DN is regulated at least partially by H2AK119Ub through both AT1 and AT2 receptors, which to the best of our knowledge, presents the first report for the regulation of Mcp1 by H2AK119Ub. Thus an approach targeting AT1R blockade and AT2R activation accompanied by an epigenetic modulator may be more suitable to ameliorate the macrophage infiltration and fibrosis associated with T2DN.
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Affiliation(s)
- Anuradha Pandey
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan, 333031, India
| | - Santosh Kumar Goru
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan, 333031, India
| | - Almesh Kadakol
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan, 333031, India
| | - Vajir Malek
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan, 333031, India
| | - Nisha Sharma
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan, 333031, India
| | - Anil Bhanudas Gaikwad
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan, 333031, India.
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Tsai CY, Li FCH, Wu CHY, Chang AYW, Chan SHH. Sumoylation of IkB attenuates NF-kB-induced nitrosative stress at rostral ventrolateral medulla and cardiovascular depression in experimental brain death. J Biomed Sci 2016; 23:65. [PMID: 27658615 PMCID: PMC5034413 DOI: 10.1186/s12929-016-0283-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 09/02/2016] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Small ubiquitin-related modifier (SUMO) is a group of proteins that participates in post-translational modifications. One known SUMO target is the transcription factor nuclear factor-kB (NF-kB) that plays a pivotal role in many disease processes; sumoylation inactivates NF-kB by conjugation with inhibitors of NF-kB (IkB). Our laboratory demonstrated previously that transcriptional upregulation of nitric oxide synthase II (NOS II) by NF-kB, leading to nitrosative stress by the formation of peroxynitrite in the rostral ventrolateral medulla (RVLM), underpins the defunct brain stem cardiovascular regulation that precedes brain death. Based on an experimental endotoxemia model, this study evaluated the hypothesis that sumoylation plays a pro-life role in brain death by interacting with the NF-kB/NOS II/peroxynitrite signaling pathway in the RVLM. RESULTS In Sprague-Dawley rats, intravenous administration of Escherichia coli lipopolysaccharide (LPS; 10 mg kg-1) elicited an augmentation of SUMO-1 and ubiquitin-conjugase 9 (Ubc9) mRNA or protein levels, alongside SUMO-1-conjugated proteins in the RVLM. Immunoneutralization of SUMO-1 or Ubc9 in the RVLM significantly potentiated the already diminished sumoylation of IkBα and intensified NF-kB activation and NOS II/peroxynitrite expression in this brain stem substrate, together with exacerbated fatality, cardiovascular depression and reduction of an experimental index of a life-and-death signal detected from arterial pressure that disappears in comatose patients signifying failure of brain stem cardiovascular regulation before brain death. CONCLUSION We conclude that sumoylation of IkB in the RVLM ameliorates the defunct brain stem cardiovascular regulation that underpins brain death in our experimental endotoxemia modal by reducing nitrosative stress via inhibition of IkB degradation that diminishes the induction of the NF-kB/NOS II/peroxynitrite signaling cascade.
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Affiliation(s)
- Ching-Yi Tsai
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, 83301 Taiwan Republic of China
| | - Faith C. H. Li
- Institute of Physiology, National Cheng Kung University, Tainan, Taiwan Republic of China
| | - Carol H. Y. Wu
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, 83301 Taiwan Republic of China
| | - Alice Y. W. Chang
- Institute of Physiology, National Cheng Kung University, Tainan, Taiwan Republic of China
| | - Samuel H. H. Chan
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, 83301 Taiwan Republic of China
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Chang E, Abe JI. Kinase-SUMO networks in diabetes-mediated cardiovascular disease. Metabolism 2016; 65:623-633. [PMID: 27085771 PMCID: PMC5226250 DOI: 10.1016/j.metabol.2016.01.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 01/07/2016] [Accepted: 01/12/2016] [Indexed: 12/20/2022]
Abstract
Type II diabetes mellitus (DM) is a common comorbidity in patients with cardiovascular disease (CVD). Epidemiological studies including the Framingham, UKPDS, and MRFIT studies have shown diabetes to be an independent risk factor for cardiovascular disease associated with increased incidence of morbidity and mortality. However, major randomized controlled clinical trials including ADVANCE, VAD, and ACCORD have failed to demonstrate a significant reduction in CVD complications from longstanding DM with strict glycemic control. This suggests that despite the strong clinical correlation between DM and CVD, the precise mechanisms of DM-mediated CVD pathogenesis remain unclear. Signal transduction investigations have shed some light on this question with numerous studies demonstrating the role of kinase pathways in facilitating DM and CVD pathology. Abnormalities in endothelial, vascular smooth muscle, and myocardial function from the pathological insults of hyperglycemia and oxidative stress in diabetes are thought to accelerate the development of cardiovascular disease. Extensive interplay between kinase pathways that regulate the complex pathology of DM-mediated CVD is heavily regulated by a number of post-translational modifications (PTMs). In this review, we focus on the role of a dynamic PTM known as SUMOylation and its role in regulating these kinase networks to provide a mechanistic link between DM and CVD.
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Affiliation(s)
- Eugene Chang
- Department of Medicine, Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, OH, USA
| | - Jun-Ichi Abe
- Department of Cardiology - Research, Division of Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
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Zhao T, Sun S, Zhang H, Huang X, Yan M, Dong X, Wen Y, Wang H, Lan HY, Li P. Therapeutic Effects of Tangshen Formula on Diabetic Nephropathy in Rats. PLoS One 2016; 11:e0147693. [PMID: 26807792 PMCID: PMC4726711 DOI: 10.1371/journal.pone.0147693] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 01/07/2016] [Indexed: 01/08/2023] Open
Abstract
Objective Inflammation and fibrosis are essential promoters in the pathogenesis of diabetic nephropathy (DN) in type 2 diabetes. The present study examined the anti-inflammation and anti-fibrosis effect of Tangshen Formula (TSF), a traditional Chinese medicine, on DN. Research Design and Methods Protective role of TSF in DN was examined in a rat model of type 2 DN that was established by high-fat diet-fed and low-dose-streptozotocin injection. TSF was suspended in 0.5% CMC-Na solution and delivered by oral gavage at a dosage of 1.67g/Kg body weight/day. The therapeutic effects and mechanisms of TSF on diabetic kidney injury were examined. Results We found that TSF treatment for 20 weeks attenuated DN by significantly inhibiting urinary excretion of albumin and renal histological injuries. These beneficial effects were associated with an inactivation of NF-κB signaling, thereby blocking the upregulation of pro-inflammatory cytokines (IL-1β, TNFα), chemokine (MCP-1), and macrophage infiltration in the TSF-treated rats with type 2 DN. In addition, TSF treatment also inactivated TGF-β/Smad3 signaling and therefore suppressed renal fibrosis including expressions of fibronectin, collagen I, and collagen IV. Further studies revealed that the inhibitory effect of TSF on TGF-β/Smad3 and NF-κB signaling in DN was associated with inhibition of Smurf2-dependent ubiquitin degradation of Smad7. Conclusions The present study reveals that TSF has therapeutic potential for type 2 DN in rats. Blockade of NF-κB-driven renal inflammation and TGF-β/Smad3-mediated renal fibrosis by preventing the Smurf2-mediated Smad7 degradation pathway may be mechanisms through which TSF inhibits type 2 DN.
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Affiliation(s)
- TingTing Zhao
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - SiFan Sun
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - HaoJun Zhang
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - XiaoRu Huang
- Department of Medicine and Therapeutics, and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, and Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - MeiHua Yan
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Xi Dong
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - YuMin Wen
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Hua Wang
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
| | - Hui Yao Lan
- Department of Medicine and Therapeutics, and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, and Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
- * E-mail: (PL); (HL)
| | - Ping Li
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
- * E-mail: (PL); (HL)
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HIF-1α SUMOylation affects the stability and transcriptional activity of HIF-1α in human lens epithelial cells. Graefes Arch Clin Exp Ophthalmol 2015; 253:1279-90. [PMID: 25877955 DOI: 10.1007/s00417-015-2999-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 02/02/2015] [Accepted: 03/25/2015] [Indexed: 01/11/2023] Open
Abstract
PURPOSE High blood glucose can induce oxidative damage and result in diabetic cataract. Oxidative stress induces various signal pathways including HIF-1α transcriptional signal to attenuate the damage of lenses. Whether HIF-1α SUMOylation can increase the activation of HIF-1α or if high glucose can affect the SUMOylation of HIF-1α in cultured human lens epithelial cells (HLECs) is still unknown, as well as the function of HIF-1α SUMOylation in oxidative damage induced by high glucose in HLECs. In the present study, we examined SUMO and SUMO E3 (Cbx4 and PIASy) expression induced by high glucose, and investigated SUMO or SUMO E3 overexpression that enhanced HIF-1α SUMOylation in HLECs. METHODS SRA01/04 cells, one kind of human lens epithelial cell line, were addressed in media with 5.5 mmol/l (normal control group), 25 mmol/l (high glucose1 group) and 50 mmol/l (high glucose2 group) final glucose respectively. Expression of SUMO1 ~ 4, Cbx4, PIASy, HIF-1α, GLUT1, and VEGFA were detected in the mRNA and protein levels by RT-PCR and Western blot analysis. Protein expression localization and co-localization were examined by immunofluorescence and co-immunofluorescence. The effects of SUMO overexpression, SUMO E3 overexpression, and Proteasome inhibitor MG132 respectively on the stability and transcriptional activity of HIF-1α were analyzed by immunoblot. RESULTS High glucose treatment induced SUMO1-4 expression and enhanced the expression of Cbx4 and PIASy. It also increased the expression of HIF-1α, GLUT1, and VEGFA. The co-localization of HIF-1α and SUMO was mainly in the nucleus induced by high glucose. Further studies showed that SUMO overexpression or SUMO E3 overexpression could enhance HIF-1α stability and transcriptional activity in HLECs. Proteasome inhibitor MG132 protected the stability and transcriptional activity of HIF-1α in the SRA01/04 cells. CONCLUSIONS HIF-1α SUMOylation affected the stability and transcriptional activity of HIF-1α in cultured human lens epithelial cells; SUMO overexpression or SUMO E3 overexpression enhanced the expression of HIF-1α, which is involved in inhibiting cell apoptosis and protecting lens opacification, and presumably plays a key role in protecting lenses from diabetic cataract.
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Ni WJ, Tang LQ, Wei W. Research progress in signalling pathway in diabetic nephropathy. Diabetes Metab Res Rev 2015; 31:221-33. [PMID: 24898554 DOI: 10.1002/dmrr.2568] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 04/14/2014] [Accepted: 05/31/2014] [Indexed: 11/05/2022]
Abstract
Diabetic nephropathy, a lethal diabetic complication, is a leading cause of end-stage renal disease, which is pathologically characterized by thickened tubular basal and glomerular membranes, accumulated extracellular matrix, and progressive mesangial hypertrophy. Growing evidence indicates that diabetic nephropathy is induced by multiple conditions, such as glucose metabolism disorder, oxidative stress, numerous inflammatory factors and cytokines, and haemodynamic changes that lead to the occurrence and development of diabetic nephropathy based on genetic susceptibility. A variety of abnormalities in the signalling pathway may interact to produce these pathologic processes. Research has aimed to highlight the signalling pathway mechanisms that lead to diabetic nephropathy so that preventative strategies and effective therapies might be developed. In this review, important pathways that appear to be involved in driving these processes are discussed.
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Affiliation(s)
- Wei-Jian Ni
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Hefei 230032, Anhui Province, China; Affiliated Anhui Provincial Hospital, Anhui Medical University, Hefei 230001, Anhui Province, China
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Minocycline Alleviates Sevoflurane-Induced Cognitive Impairment in Aged Rats. Cell Mol Neurobiol 2015; 35:585-94. [DOI: 10.1007/s10571-014-0154-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 12/29/2014] [Indexed: 12/15/2022]
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The role of ubiquitination and sumoylation in diabetic nephropathy. BIOMED RESEARCH INTERNATIONAL 2014; 2014:160692. [PMID: 24991536 PMCID: PMC4065738 DOI: 10.1155/2014/160692] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 05/19/2014] [Indexed: 01/14/2023]
Abstract
Diabetic nephropathy (DN) is a common and characteristic microvascular complication of diabetes; the mechanisms that cause DN have not been clarified, and the epigenetic mechanism was promised in the pathology of DN. Furthermore, ubiquitination and small ubiquitin-like modifier (SUMO) were involved in the progression of DN. MG132, as a ubiquitin proteasome, could improve renal injury by regulating several signaling pathways, such as NF-κB, TGF-β, Nrf2-oxidative stress, and MAPK. In this review, we summarize how ubiquitination and sumoylation may contribute to the pathology of DN, which may be a potential treatment strategy of DN.
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Gao C, Aqie K, Zhu J, Chen G, Xu L, Jiang L, Xu Y. MG132 ameliorates kidney lesions by inhibiting the degradation of Smad7 in streptozotocin-induced diabetic nephropathy. J Diabetes Res 2014; 2014:918396. [PMID: 24511554 PMCID: PMC3913347 DOI: 10.1155/2014/918396] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 10/19/2013] [Accepted: 11/17/2013] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Smad7 is the main negative regulatory protein in the transforming growth factor-β (TGF-β) downstream signaling pathway, which plays an important role in diabetic nephropathy (DN) and may be related to the ubiquitin proteasome pathway (UPP). AIM We investigated the role of UPP in regulating TGF-β/SMAD signaling and explored the therapeutic effect of the ubiquitin proteasome inhibitor MG132 on DN. METHODS Wistar rats were randomly divided into a diabetes group and a normal control group. Rats in the diabetes group were injected intraperitoneally with streptozotocin. Diabetic rats were then randomly divided into a diabetic nephropathy group (DN group), an MG132 high concentration (MH) group, and an MG132 low concentration (ML) group. After 8 weeks of treatment, 24-hour urinary microalbumin (UAlb), urinary protein/urinary creatinine (Up/Ucr) values, ALT, AST, Bcr, kidney damage, TGF-β, Smad7, fibronectin (FN), and Smurf2 were detected. RESULTS The body mass and Smad7 protein expression decreased in DN group, but kidney weight, kidney weight index, UAlb, Up/Ucr, FN and Smurf2 mRNA expression, and TGF-β protein expression increased. However, these changes diminished following treatment with MG132, and a more pronounced effect was evident in MH group compared to ML group. CONCLUSION MG132 alleviates kidney damage by inhibiting Smad7 ubiquitin degradation and TGF-β activation in DN.
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Affiliation(s)
- Chenlin Gao
- Department of Endocrinology, Affiliated Hospital of Luzhou Medical College, Luzhou, Sichuan 646000, China
| | - Keri Aqie
- Department of Endocrinology, First People's Hospital of Liangshan, Xichang, Sichuan 615000, China
| | - Jianhua Zhu
- Department of Endocrinology, Affiliated Hospital of Luzhou Medical College, Luzhou, Sichuan 646000, China
| | - Guo Chen
- Department of Endocrinology, Affiliated Hospital of Luzhou Medical College, Luzhou, Sichuan 646000, China
| | - Ling Xu
- Department of Endocrinology, Affiliated Hospital of Luzhou Medical College, Luzhou, Sichuan 646000, China
| | - Lan Jiang
- Department of Endocrinology, Affiliated Hospital of Luzhou Medical College, Luzhou, Sichuan 646000, China
| | - Yong Xu
- Department of Endocrinology, Affiliated Hospital of Luzhou Medical College, Luzhou, Sichuan 646000, China
- *Yong Xu:
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