scholarly journals Exogenous H2S regulates endoplasmic reticulum-mitochondria cross-talk to inhibit apoptotic pathways in STZ-induced type I diabetes

2017 ◽  
Vol 312 (3) ◽  
pp. E190-E203 ◽  
Author(s):  
Fan Yang ◽  
Xiangjing Yu ◽  
Ting Li ◽  
Jianjun Wu ◽  
Yajun Zhao ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Cardiac Function ◽  
Er Stress ◽  
Ultrastructural Changes ◽  
Type I ◽  
Cardiac Tissues ◽  
Mptp Opening ◽  
Cyt C ◽  
Apoptotic Proteins ◽  
Apoptotic Pathways

The upregulation of reactive oxygen species (ROS) is a primary cause of cardiomyocyte apoptosis in diabetes cardiomyopathy (DCM). Mitofusin-2 (Mfn-2) is a key protein that bridges the mitochondria and endoplasmic reticulum (ER). Hydrogen sulfide (H2S)-mediated cardioprotection is related to antioxidant effects. The present study demonstrated that H2S inhibited the interaction between the ER and mitochondrial apoptotic pathway. This study investigated cardiac function, ultrastructural changes in the ER and mitochondria, apoptotic rate using TUNEL, and the expression of ER stress-associated proteins and mitochondrial apoptotic proteins in cardiac tissues in STZ-induced type I diabetic rats treated with or without NaHS (donor of H2S). Mitochondria of cardiac tissues were isolated, and MPTP opening and cytochrome c (cyt C) and Mfn-2 expression were also detected. Our data showed that hyperglycemia decreased the cardiac function by ultrasound cardiogram, and the administration of exogenous H2S ameliorated these changes. We demonstrated that the expression of ER stress sensors and apoptotic rates were elevated in cardiac tissue of DCM and cultured H9C2 cells, but the expression of these proteins was reduced following exogenous H2S treatment. The expression of mitochondrial apoptotic proteins, cyt C, and mPTP opening was decreased following treatment with exogenous H2S. In our experiment, the expression and immunofluorescence of Mfn-2 were both decreased after transfection with Mfn-2-siRNA. Hyperglycemia stimulated ER interactions and mitochondrial apoptotic pathways, which were inhibited by exogenous H2S treatment through the regulation of Mfn-2 expression.

scholarly journals Aromadendrin Protects Neuronal Cells from Methamphetamine-Induced Neurotoxicity by Regulating Endoplasmic Reticulum Stress and PI3K/Akt/mTOR Signaling Pathway

2021 ◽  
Vol 22 (5) ◽  
pp. 2274
Author(s):  
Hyun-Su Lee ◽  
Eun-Nam Kim ◽  
Gil-Saeng Jeong
Keyword(s):  
Endoplasmic Reticulum ◽  
Er Stress ◽  
Signaling Pathway ◽  
Neuronal Cells ◽  
Mammalian Target Of Rapamycin ◽  
Mtor Signaling ◽  
Mtor Signaling Pathway ◽  
Irreversible Damage ◽  
Pre Treatment ◽  
Apoptotic Pathways

Methamphetamine (METH) is a highly addictive drug that induces irreversible damage to neuronal cells and pathological malfunction in the brain. Aromadendrin, isolated from the flowers of Chionanthus retusus, has been shown to have anti-inflammatory or anti-tumor activity. Nevertheless, it has been reported that METH exacerbates neurotoxicity by inducing endoplasmic reticulum (ER) stress via the phosphoinositide 3-kinase/Akt/mammalian target of rapamycin (PI3K/Akt/mTOR) pathway in neuronal cells. There is little evidence that aromadendrin protects cells from neurotoxicity induced by METH. In this study, we found that aromadendrin partially suppressed the METH-induced cell death in SH-SY5y cells without causing cytotoxicity. Aromadendrin regulated METH-induced ER stress by preserving the phosphorylation of the PI3K/Akt/mTOR signaling pathway in METH-exposed SH-SY5y cells. In addition, aromadendrin mitigated METH-induced autophagic and the apoptotic pathways in METH-exposed SH-SY5y cells. Mechanistic studies revealed that pre-treatment with aromadendrin restored the expression of anti-apoptotic proteins in METH-exposed conditions. The inhibitor assay confirmed that aromadendrin-mediated restoration of mTOR phosphorylation protected cells from autophagy and apoptosis in METH-exposed cells. Therefore, these findings suggest that aromadendrin relatively has a protective effect on SH-SY5y cells against autophagy and apoptosis induced by METH via regulation of ER stress and the PI3K/Akt/mTOR signaling pathway.

Abstract 276: SR-BI Suppresses Apoptosis by Reducing Endoplasmic Reticulum Stress and Promoting Akt Activity in Macrophages

2014 ◽  
Vol 34 (suppl_1) ◽  
Author(s):  
Huan Tao ◽  
Patricia G Yancey ◽  
Sean S Davies ◽  
L Jackson Roberts ◽  
John L Blakemore ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Apolipoprotein E ◽  
Er Stress ◽  
Cell Apoptosis ◽  
Free Cholesterol ◽  
Oxidized Ldl ◽  
Tunel Staining ◽  
Type I ◽  
Apoptotic Cells ◽  
Atherosclerotic Lesions

Objective: Macrophage apoptosis contributes to atherosclerotic plaque necrosis, inflammation, development and rupture. Scavenger receptor class B type I (SR-BI) is a key regulator of HDL metabolism and cellular cholesterol homeostasis. Here we examined the hypothesis that macrophage SR-BI modulates lipid-associated cellular stress and apoptosis. Methods and Results: In vitro cell apoptosis assays were performed in primary macrophages, and for in vivo evidence, we examined TUNEL staining of atherosclerotic lesions of LDLR -/- mice that were reconstituted with SR-BI -/- or WT bone marrow after 16 weeks on a Western diet. We found that SR-BI deficiency led to ~64.3% more apoptotic cells induced by oxidized LDL or free cholesterol in primary macrophages, and 6-fold more lesional apoptotic cells in SR-BI -/- →LDLR -/- mice compared to WT recipient mice. In macrophages, SR-BI deficiency caused significant accumulations of cellular free cholesterol and elevated markers of endoplasmic reticulum (ER) stress. These were exacerbated by feeding mice a high-cholesterol diet or inactivating the apolipoprotein E gene. Peroxidation of lipoproteins and cell membranes leads to modification of phosphatidylethanolamine by lipid aldehydes including isolevuglandins (IsoLG-PE). Treatment of macrophages with IsoLG-PE induced 52.6% more apoptotic cells in SR-BI -/- macrophages compared to WT. Transgenic expression of SR-BI by transfection of SR-BI -/- macrophages rescued oxidative stress-induced ER stress and cell apoptosis. SR-BI deficiency inhibited the Akt pathway compromising macrophage survival and increasing lesion necrosis. Moreover, Akt Activator was able to rescue SR-BI deficiency associated apoptosis in macrophages. Apolipoprotein E interacts with SR-BI in macrophages, co-operating for cellular lipid homeostasis and cell survival signaling. Conclusion: SR-BI protects against cell apoptosis induced by lipid stress in macrophages and atherosclerotic lesions. The underlying mechanisms are, at least in part, through reducing lipid-associated ER stress and promoting Akt activity in macrophages. Thus, we identify macrophage SR-BI-mediated apoptosis pathways as molecular targets for the prevention of atherosclerotic cardiovascular events.

scholarly journals The PERK-EIF2α-ATF4 signaling branch regulates osteoblast differentiation and proliferation by PTH

2019 ◽  
Vol 316 (4) ◽  
pp. E590-E604 ◽  
Author(s):  
Kefan Zhang ◽  
Miaomiao Wang ◽  
Yingjiang Li ◽  
Chunping Li ◽  
Shaidi Tang ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Endoplasmic Reticulum ◽  
Transcription Factor ◽  
Er Stress ◽  
Signaling Pathway ◽  
Osteoblast Differentiation ◽  
Type I ◽  
Matrix Mineralization ◽  
Related Peptide ◽  
Differentiation And Proliferation

Parathyroid hormone (PTH) and its related peptide (PTH-related peptide 1–34) are two of the Food and Drug Administration-approved bone-promoting drugs for age-related osteoporosis. Treatment with PTH stimulates bone formation. However, the molecular mechanisms of PTH-mediated osteoblast differentiation and cell proliferation are still not completely understood. In this study, we showed that PTH induced endoplasmic reticulum (ER) stress in osteoblasts through the PKR-like endoplasmic reticulum kinase (PERK)-eukaryotic initiation factor 2α (EIF2α)-activating transcription factor 4 (ATF4)-signaling pathway. After separately blocking PERK-EIF2α-ATF4 signaling with two different inhibitors [AMG’44 and integrated stress response inhibitor (ISRIB)] or specific small interfering RNA for PERK and ATF4, the following targets were all downregulated: expression of osteoblast differentiation markers [runt-related transcription factor 2 (Runx2), alkaline phosphatase (Alp), type I collagen (Col1a1), and osteocalcin (Ocn)], cell proliferation markers (CyclinE, CyclinD, and CDC2), amino acid import (Glyt1), and metabolism-related genes (Asns). Additionally, Alp-positive staining cells, Alp activity, matrix mineralization, Ocn secretion, and cell proliferation indexes were inhibited. Interestingly, we found that salubrinal enhanced PTH-induced osteoblast differentiation and proliferation by maintenance of phosphorylation of EIF2α. Furthermore, we observed that PTH increased the association between heat shock protein 90 (HSP90) and PERK and maintained PERK protein stabilization in the early stages of PTH-induced ER stress. Treatment of MC3T3-E1 cells with geldanamycin, an HSP90 inhibitor, decreased PERK protein expression and inhibited osteoblast differentiation and cell proliferation upon PTH treatment. Taken together, our data demonstrate that PTH regulates osteoblast differentiation and cell proliferation, partly by activating the HSP90-dependent PERK-EIF2α-ATF4 signaling pathway.

scholarly journals A role for BiP as an adjustor for the endoplasmic reticulum stress-sensing protein Ire1

2004 ◽  
Vol 167 (3) ◽  
pp. 445-456 ◽  
Author(s):  
Yukio Kimata ◽  
Daisuke Oikawa ◽  
Yusuke Shimizu ◽  
Yuki Ishiwata-Kimata ◽  
Kenji Kohno
Keyword(s):  
Endoplasmic Reticulum ◽  
Er Stress ◽  
Binding Site ◽  
Transmembrane Domain ◽  
Transmembrane Protein ◽  
Sensory System ◽  
Type I ◽  
Stress Signal ◽  
Stress Sensing ◽  
The Unfolded Protein Response

In the unfolded protein response, the type I transmembrane protein Ire1 transmits an endoplasmic reticulum (ER) stress signal to the cytoplasm. We previously reported that under nonstressed conditions, the ER chaperone BiP binds and represses Ire1. It is still unclear how this event contributes to the overall regulation of Ire1. The present Ire1 mutation study shows that the luminal domain possesses two subregions that seem indispensable for activity. The BiP-binding site was assigned not to these subregions, but to a region neighboring the transmembrane domain. Phenotypic comparison of several Ire1 mutants carrying deletions in the indispensable subregions suggests these subregions are responsible for multiple events that are prerequisites for activation of the overall Ire1 proteins. Unexpectedly, deletion of the BiP-binding site rendered Ire1 unaltered in ER stress inducibility, but hypersensitive to ethanol and high temperature. We conclude that in the ER stress-sensory system BiP is not the principal determinant of Ire1 activity, but an adjustor for sensitivity to various stresses.

scholarly journals Melatonin Can Modulate the Effect of Navitoclax (ABT-737) in HL-60 Cells

Antioxidants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1143
Author(s):  
Alexey Lomovsky ◽  
Yulia Baburina ◽  
Irina Odinokova ◽  
Margarita Kobyakova ◽  
Yana Evstratova ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Membrane Potential ◽  
Er Stress ◽  
Cancer Cells ◽  
Cell Model ◽  
Antioxidant Property ◽  
Combined Effect ◽  
Ros Production ◽  
Retention Capacity ◽  
Apoptotic Proteins

Melatonin (N-acetyl-5-methoxytryptamine MEL) is an indolamine that has antioxidant, anti-inflammatory and anti-tumor properties. Moreover, MEL is capable of exhibiting both anti-apoptotic and pro-apoptotic effects. In the normal cells, MEL possesses antioxidant property and has an anti-apoptotic effect, while in the cancer cells it has pro-apoptotic action. We investigated the combined effect of MEL and navitoclax (ABT-737), which promotes cell death, on the activation of proliferation in acute promyelocytic leukemia on a cell model HL-60. The combined effect of these compounds leads to a reduction of the index of mitotic activity. The alterations in the level of anti- and pro-apoptotic proteins such as BclxL, Bclw, Mcl-1, and BAX, membrane potential, Ca2+ retention capacity, and ROS production under the combined action of MEL and ABT-737 were performed. We obtained that MEL in combination with ABT-737 decreased Ca2+ capacity, dropped membrane potential, increased ROS production, suppressed the expression of anti-apoptotic proteins such as BclxL, Bclw, and Mcl-1, and enhanced the expression of pro-apoptotic BAX. Since, MEL modulates autophagy and endoplasmic reticulum (ER) stress in cancer cells, the combined effect of MEL and ABT-737 on the expression of ER stress and autophagy markers was checked. The combined effect of MEL and ABT-737 (0.2 μM) increased the expression of protein kinase R (PKR)-like endoplasmic reticulum kinase (PERK), leading to a decrease in the level of binding immunoglobulin protein (BIP) followed by an increase in the level of C/EBP homologous protein (CHOP). In this condition, the expression of ERO1 decreased, which could lead to a decrease in the level of protein disulfide isomerase (PDI). The obtained data suggested that melatonin has potential usefulness in the treatment of cancer, where it is able to modulate ER stress, autophagy and apoptosis.

scholarly journals ATP6AP2 functions as a V-ATPase assembly factor in the endoplasmic reticulum

2018 ◽  
Vol 29 (18) ◽  
pp. 2156-2164 ◽  
Author(s):  
Maria Clara Guida ◽  
Tobias Hermle ◽  
Laurie A. Graham ◽  
Virginie Hauser ◽  
Margret Ryan ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Er Stress ◽  
Planar Cell Polarity ◽  
Transmembrane Protein ◽  
Type I ◽  
Genetic Studies ◽  
C Terminus ◽  
Assembly Factor ◽  
Pcp Signaling ◽  
Er Homeostasis

ATP6AP2 (also known as the [pro]renin receptor) is a type I transmembrane protein that can be cleaved into two fragments in the Golgi apparatus. While in Drosophila ATP6AP2 functions in the planar cell polarity (PCP) pathway, recent human genetic studies have suggested that ATP6AP2 could participate in the assembly of the V-ATPase in the endoplasmic reticulum (ER). Using a yeast model, we show here that the V-ATPase assembly factor Voa1 can functionally be replaced by Drosophila ATP6AP2. This rescue is even more efficient when coexpressing its binding partner ATP6AP1, indicating that these two proteins together fulfill Voa1 functions in higher organisms. Structure–function analyses in both yeast and Drosophila show that proteolytic cleavage is dispensable, while C-terminus-dependent ER retrieval is required for ATP6AP2 function. Accordingly, we demonstrate that both overexpression and lack of ATP6AP2 causes ER stress in Drosophila wing cells and that the induction of ER stress is sufficient to cause PCP phenotypes. In summary, our results suggest that full-length ATP6AP2 contributes to the assembly of the V-ATPase proton pore and that impairment of this function affects ER homeostasis and PCP signaling.

Cortistatin Improves Cardiac Function After Acute Myocardial Infarction in Rats by Suppressing Myocardial Apoptosis and Endoplasmic Reticulum Stress

2016 ◽  
Vol 22 (1) ◽  
pp. 83-93 ◽  
Author(s):  
Zhi-Yu Shi ◽  
Yue Liu ◽  
Li Dong ◽  
Bo Zhang ◽  
Meng Zhao ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Endoplasmic Reticulum ◽  
Cardiac Function ◽  
Er Stress ◽  
Rat Model ◽  
Caspase 3 ◽  
Apoptotic Pathway ◽  
Myocardial Apoptosis ◽  
Glucose Regulated Protein

Objectives: The endoplasmic reticulum (ER) stress-induced apoptotic pathway is associated with the development of acute myocardial infarction (AMI). Cortistatin (CST) is a novel bioactive peptide that inhibits apoptosis-related injury. Therefore, we investigated the cardioprotective effects and potential mechanisms of CST in a rat model of AMI. Methods: Male Wistar rats were randomly divided into sham, AMI, and AMI + CST groups. Cardiac function and the degree of infarction were evaluated by echocardiography, cardiac troponin I activity, and 2,3,5-triphenyl-2H-tetrazolium chloride staining after 7 days. The expression of CST, ER stress markers, and apoptotic markers was examined using immunohistochemistry and Western blotting. Results: Compared to the AMI group, the AMI + CST group exhibited markedly better cardiac function and a lower degree of infarction. Electron microscopy and terminal deoxynucleotidyl transferase dUTP nick end labeling confirmed that myocardial apoptosis occurred after AMI. Cortistatin treatment reduced the expression of caspase 3, cleaved caspase 3, and Bax (proapoptotic proteins) and promoted the expression of Bcl-2 (antiapoptotic protein). In addition, the reduced expression of glucose-regulated protein 94 (GRP94), glucose-regulated protein 78 (GRP78), CCAAT/enhancer-binding proteins homologous protein, and caspase 12 indicated that ER stress and the apoptotic pathway associated with ER stress were suppressed. Conclusions: Exogenous CST has a notable cardioprotective effect after AMI in a rat model in that it improves cardiac function by suppressing ER stress and myocardial apoptosis.

scholarly journals 4-Phenylbutyric Acid Attenuates Pancreatic Beta-Cell Injury in Rats with Experimental Severe Acute Pancreatitis

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Yu-pu Hong ◽  
Wen-yi Guo ◽  
Wei-xing Wang ◽  
Liang Zhao ◽  
Ming-wei Xiang ◽  
...  
Keyword(s):  
Acute Pancreatitis ◽  
Endoplasmic Reticulum ◽  
Beta Cell ◽  
Er Stress ◽  
Severe Acute Pancreatitis ◽  
Cell Injury ◽  
Pancreatic Beta Cell ◽  
Ultrastructural Changes ◽  
Endocrine Disorder ◽  
Phenylbutyric Acid

Endoplasmic reticulum (ER) stress is a particular process with an imbalance of homeostasis, which plays an important role in pancreatitis, but little is known about how ER stress is implicated in severe acute pancreatitis (SAP) induced pancreatic beta-cell injury. To investigate the effect of 4-phenylbutyric acid (4-PBA) on the beta-cell injury following SAP and the underlying mechanism, twenty-four Sprague-Dawley rats were randomly divided into sham-operation (SO) group, SAP model group, and 4-PBA treatment group. SAP model was induced by infusion of 5% sodium taurocholate into the biliopancreatic duct. 4-PBA or normal saline was injected intraperitoneally for 3 days in respective group before successful modeling. Results showed that 4-PBA attenuated the following: (1) pancreas and islet pathological injuries, (2) serum TNF-αand IL-1β, (3) serum insulin and glucose, (4) beta-cell ultrastructural changes, (5) ER stress markers (BiP, ORP150, and CHOP), Caspase-3, and insulin expression in islet. These results suggested that 4-PBA mitigates pancreatic beta-cell injury and endocrine disorder in SAP, presumably because of its role in inhibiting excessive endoplasmic reticulum stress. This may serve as a new therapeutic target for reducing pancreatic beta-cell injury and endocrine disorder in SAP upon 4-PBA treatment.

scholarly journals Endoplasmic Reticulum Stress Regulates Scleral Remodeling in a Guinea Pig Model of Form-Deprivation Myopia

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Chengcheng Zhu ◽  
Qingzhong Chen ◽  
Ying Yuan ◽  
Min Li ◽  
Bilian Ke
Keyword(s):  
Endoplasmic Reticulum ◽  
Guinea Pig ◽  
Er Stress ◽  
Western Blotting ◽  
Guinea Pigs ◽  
Pig Model ◽  
Ultrastructural Changes ◽  
Protein Levels ◽  
Guinea Pig Model

Purpose. This study aimed to investigate the role of endoplasmic reticulum (ER) stress in scleral remodeling in a guinea pig model of form-deprivation myopia (FDM). Methods. Guinea pigs were form deprived to induce myopia. ER ultrastructural changes in the sclera were examined by transmission electron microscopy (TEM). The protein levels of ER stress chaperones, including GRP78, CHOP, and calreticulin (CRT), were analyzed by western blotting at 24 hours, 1 week, and 4 weeks of FD. Scleral fibroblasts from guinea pigs were cultured and exposed to the ER stress inducer tunicamycin (TM) or the ER stress inhibitor 4-phenylbutyric acid (4-PBA). CRT was knocked down by lentivirus-mediated CRT shRNA transfection. The expression levels of GRP78, CHOP, TGF-β1, and COL1A1 were analyzed by qRT-PCR or western blotting. Results. The sclera of FDM eyes exhibited swollen and distended ER at 4 weeks, as well as significantly increased protein expression of GRP78 and CRT at 1 week and 4 weeks, compared to the sclera of the control eyes. In vitro, TM induced ER stress in scleral fibroblasts, which was suppressed by 4-PBA. The mRNA expression of TGF-β1 and COL1A1 was upregulated after TM stimulation for 24 hours, but downregulated for 48 hours. Additionally, change of TGF-β1 and COL1A1 transcription induced by TM was suppressed by CRT knockdown. Conclusions. ER stress was an important modulator which could influence the expression of the scleral collagen. CRT might be a new target for the intervention of the FDM scleral remodeling process.

scholarly journals Uric Acid Induces Cardiomyocyte Apoptosis via Activation of Calpain-1 and Endoplasmic Reticulum Stress

2018 ◽  
Vol 45 (5) ◽  
pp. 2122-2135 ◽  
Author(s):  
Meiling Yan ◽  
Kankai Chen ◽  
Li He ◽  
Shuai Li ◽  
Dong Huang ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Uric Acid ◽  
Cardiac Function ◽  
Cell Viability ◽  
Er Stress ◽  
Interstitial Fibrosis ◽  
Cardiomyocyte Apoptosis ◽  
Underlying Mechanisms

Background/Aims: Hyperuricemia is associated with an increased risk for multiple cardiovascular diseases, but the underlying mechanisms remain largely elusive. Calpain-1 is a protease that is implicated in several pathological conditions that affect the heart. The aim of this current study was to test the effects of uric acid (UA) on cardiomyocyte survival and cardiac function and to investigate the role of calpain-1 in the UA-induced effects in the heart and their underlying mechanisms. Methods: In vivo, hyperuricemia was induced by oxonic acid (OA) administration in Sprague-Dawley rats for 16 weeks; TUNEL staining was used to identify apoptotic cells. Left ventricular (LV) sections were stained with Sirius Red to evaluate interstitial fibrosis. Cardiac catheterization was performed to evaluate cardiac function. In vitro, cultured H9c2 cells were incubated with different UA concentrations. MTT assays and flow cytometry were used to evaluate cell viability and apoptosis. All related gene expression levels were analyzed by quantitative real-time PCR (qRT-PCR), and all protein expression levels were analyzed by western blotting. Results: Hyperuricemia induction in vivo resulted in cellular apoptosis, interstitial fibrosis and diastolic dysfunction in the rat hearts, as well as increased activation of calpain-1 and endoplasmic reticulum (ER) stress, while allopurinol treatment mitigated the above changes. UA administration in vitro increased apoptosis and decreased H9c2 cell viability in a dose-dependent manner. Increased activation of calpain-1 and ER stress was also observed in the groups with high UA levels. Calpain-1 siRNA and the calpain inhibitor CI-III alleviated UA-induced ER stress and apoptosis, while inhibiting ER stress by tauroursodeoxycholic acid (TUDCA) mitigated UA-induced apoptosis without affecting calpain-1 expression or activity. Conclusions: These findings suggest that UA induces cardiomyocyte apoptosis through activation of calpain-1 and ER stress. These results may provide new insights into the mechanisms of hyperuricemia-associated cardiovascular risks and hopefully identify new treatment targets.

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