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Duan R, Niu H, Dong F, Yu T, Li X, Wu H, Zhang Y, Yang T. Short-term exposure to fine particulate matter and genome-wide DNA methylation in chronic obstructive pulmonary disease: A panel study conducted in Beijing, China. Front Public Health 2023; 10:1069685. [PMID: 36684947 PMCID: PMC9850166 DOI: 10.3389/fpubh.2022.1069685] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/08/2022] [Indexed: 01/07/2023] Open
Abstract
Background Fine particulate matter (PM2.5) is a crucial risk factor for chronic obstructive pulmonary disease (COPD). However, the mechanisms whereby PM2.5 contribute to COPD risk have not been fully elucidated. Accumulating evidence suggests that epigenetics, including DNA methylation, play an important role in this process; however, the association between PM2.5 exposure and genome-wide DNA methylation in patients with COPD has not been studied. Objective To evaluate the association of personal exposure to PM2.5 and genome-wide DNA methylation changes in the peripheral blood of patients with COPD. Methods A panel study was conducted in Beijing, China. We repeatedly measured and collected personal PM2.5 data for 72 h. Genome-wide DNA-methylation of peripheral blood was analyzed using the Illumina Infinium Human Methylation BeadChip (850 k). A linear-mixed effect model was used to identify the differentially methylated probe (DMP) associated with PM2.5. Finally, we performed a functional enrichment analysis of the DMPs that were significantly associated with PM2.5. Results A total of 24 COPD patients were enrolled and 48 repeated DNA methylation measurements were associated in this study. When the false discovery rate was < 0.05, 19 DMPs were significantly associated with PM2.5 and were annotated to corresponding genes. Functional enrichment analysis of these genes showed that they were related to the response to toxic substances, regulation of tumor necrosis factor superfamily cytokine production, regulation of photosensitivity 3-kinase signaling, and other pathways. Conclusion This study provided evidence for a significant relationship between personal PM2.5 exposure and DNA methylation in patients with COPD. Our research also revealed a new biological pathway explaining the adverse effects of PM2.5 exposure on COPD risk.
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Affiliation(s)
- Ruirui Duan
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing, China
| | - Hongtao Niu
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing, China
| | - Fen Dong
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing, China
| | - Tao Yu
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing, China
- Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Xuexin Li
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing, China
| | - Hanna Wu
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing, China
| | - Yushi Zhang
- Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Ting Yang
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing, China
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2
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Nakatake R, Schulz M, Kalvelage C, Benstoem C, Tolba RH. Effects of iNOS in Hepatic Warm Ischaemia and Reperfusion Models in Mice and Rats: A Systematic Review and Meta-Analysis. Int J Mol Sci 2022; 23:ijms231911916. [PMID: 36233220 PMCID: PMC9569681 DOI: 10.3390/ijms231911916] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 09/26/2022] [Accepted: 09/26/2022] [Indexed: 12/09/2022] Open
Abstract
Warm ischaemia is usually induced by the Pringle manoeuver (PM) during hepatectomy. Currently, there is no widely accepted standard protocol to minimise ischaemia-related injury, so reducing ischaemia-reperfusion damage is an active area of research. This systematic review and meta-analysis focused on inducible nitric oxide synthase (iNOS) as an early inflammatory response to hepatic ischaemia reperfusion injury (HIRI) in mouse- and rat-liver models. A systematic search of studies was performed within three databases. Studies meeting the inclusion criteria were subjected to qualitative and quantitative synthesis of results. We performed a meta-analysis of studies grouped by different HIRI models and ischaemia times. Additionally, we investigated a possible correlation of endothelial nitric oxide synthase (eNOS) and nitric oxide (NO) regulation with iNOS expression. Of 124 included studies, 49 were eligible for the meta-analysis, revealing that iNOS was upregulated in almost all HIRIs. We were able to show an increase of iNOS regardless of ischemia or reperfusion time. Additionally, we found no direct associations of eNOS or NO with iNOS. A sex gap of primarily male experimental animals used was observed, leading to a higher risk of outcomes not being translatable to humans of all sexes.
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Affiliation(s)
- Richi Nakatake
- Institute for Laboratory Animal Science and Experimental Surgery, RWTH Aachen University, 52074 Aachen, Germany
- Department of Surgery, Kansai Medical University, 2-5-1 Shinmachi, Hirakata, Osaka 573-1010, Japan
| | - Mareike Schulz
- Institute for Laboratory Animal Science and Experimental Surgery, RWTH Aachen University, 52074 Aachen, Germany
| | - Christina Kalvelage
- Department of Intensive Care Medicine, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany
| | - Carina Benstoem
- Department of Intensive Care Medicine, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany
| | - René H. Tolba
- Institute for Laboratory Animal Science and Experimental Surgery, RWTH Aachen University, 52074 Aachen, Germany
- Correspondence:
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Wu S, Guo T, Qi W, Li Y, Gu J, Liu C, Sha Y, Yang B, Hu S, Zong X. Curcumin ameliorates ischemic stroke injury in rats by protecting the integrity of the blood-brain barrier. Exp Ther Med 2021; 22:783. [PMID: 34055082 PMCID: PMC8145684 DOI: 10.3892/etm.2021.10215] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 04/16/2021] [Indexed: 12/16/2022] Open
Abstract
The blood-brain barrier (BBB) is critical for proper cerebral homeostasis and its dysfunction during ischemic stroke can result in significant neurological injury. The major goal of the present study was to identify whether curcumin pretreatment possessed protective effects on BBB integrity during the 24 h of acute ischemic brain injury. To investigate the protective effects of curcumin, male Sprague-Dawley rats were divided into multiple groups, including sham, middle cerebral artery occlusion/reperfusion (MCAO/R) vehicle and curcumin pretreated MCAO/R groups. The effects of curcumin were measured by analyzing neurological deficits, infarct size, BBB permeability and expression levels of permeability-related proteins in the brain. It was found that curcumin pretreatment significantly improved neurological scores, decreased infarct size, and protected synaptic remodeling of hippocampal neurons and upregulated the protein expression level of tight junction proteins, ZO-1, occludin and claudin-5 in ischemic rat brains. Furthermore, curcumin pretreatment before stroke was shown to downregulate the phosphorylation of NF-κB and MMP-9, which are central mediators of inflammation. The results from the present study indicated that curcumin pretreatment ameliorated ischemic stroke injury by protecting BBB integrity and synaptic remodeling, as well as inhibiting inflammatory responses.
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Affiliation(s)
- Shuguang Wu
- Department of Anesthesiology, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 313000, P.R. China
| | - Ting Guo
- Department of Neurology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Wenxuan Qi
- Jiangsu Provincial Institute of Health Emergency, Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China
| | - Yuyu Li
- Jiangsu Provincial Institute of Health Emergency, Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China
| | - Jie Gu
- Jiangsu Provincial Institute of Health Emergency, Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China
| | - Cui Liu
- Jiangsu Provincial Institute of Health Emergency, Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China
| | - Yuehong Sha
- Department of Emergency, First People's Hospital, Pizhou, Jiangsu 221300, P.R. China
| | - Baocheng Yang
- Jiangsu Provincial Institute of Health Emergency, Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China.,Emergency Center of The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China
| | - Shuqun Hu
- Jiangsu Provincial Institute of Health Emergency, Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China.,Emergency Center of The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China
| | - Xuemei Zong
- Jiangsu Provincial Institute of Health Emergency, Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China.,Emergency Center of The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China
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Zhu J, Zhu F, Song W, Zhang B, Zhang X, Jin X, Li H. Altered miR-370 expression in hepatic ischemia-reperfusion injury correlates with the level of nuclear kappa B (NF-κB) related factors. Gene 2016; 607:23-30. [PMID: 28043920 DOI: 10.1016/j.gene.2016.12.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 12/20/2016] [Accepted: 12/23/2016] [Indexed: 01/24/2023]
Abstract
BACKGROUND & AIMS MicroRNAs (miRNAs) are a class of small endogenous, non-coding RNAs that regulate gene expression at both the transcription and translation levels. Whether miRNAs have taken part in liver ischemia-reperfusion (IR) injury was rarely reported. The purpose of this article is to investigate the potential role of miR-370 in hepatic IR injury. METHODS Male C57BL/6 mice were divided into 5 groups (sham-operated group, I/R group, IPC group, antagomir-370 group and antagomir-NC), and the expression levels of miR-370 were assessed by quantitative real-time PCR. Serum enzyme analysis and histological examination of liver were used as the index of the effect of miR-370 on hepatic IR injury and following treatment of mice with antagomir-370 or antagomir-NC. The classical pathway factors of NF-κB (TAK1, TAB1, TAB2, IkBα, IKKα, IKKβ, p50, p65) were studied by quantitative real-time PCR and Western blot. RESULTS The results showed that the IR group's miR-370 expression level was significantly upregulated as compared with the sham-operated group and IPC group. Also inhibition of miR-370 led to the low expression levels of miR-370 and low levels of serum aminotransferase and hepatic histological damage as compared with the IR group. Quantitative real-time PCR showed the levels of TAK1, TAB1, TAB2, IkBα, IKKα, p65 was elevated when improving the miR-370 levels, at the same time, Western blot showed the levels of TAK1, TAB1, TAB2, IkBα, IKKα, IKKβ, p50, p65 were all elevated. CONCLUSION miR-370 acting via NF-κB might play a crucial role in hepatic IR injury, and inhibition of miR-370 could alleviate the injury to the liver. And miR-370 might positively regulated the NF-κB pathway.
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Affiliation(s)
- Jie Zhu
- College of Medicine, Ningbo University, China
| | - Fangfang Zhu
- Ningbo Medical Centre of LIHuiLi Hospital, China
| | - Wenfeng Song
- The First Affiliated Hospital, College Of Medicine, Zhejiang University
| | - Bin Zhang
- Ningbo Medical Centre of LIHuiLi Hospital, China
| | - Xie Zhang
- Ningbo Medical Centre of LIHuiLi Hospital, China
| | | | - Hong Li
- Ningbo Medical Centre of LIHuiLi Hospital, China.
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Hong FF, Wang YF, Liu H, Yang MW, Yang SL. V-PYRRO/NO downregulates mRNA expression levels of leukotriene C4 synthase during hepatic ischemia reperfusion injury in rats via inhibition of the nuclear factor-κB activation pathway. Biomed Rep 2016; 4:112-116. [PMID: 26870346 DOI: 10.3892/br.2015.533] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 09/18/2015] [Indexed: 12/17/2022] Open
Abstract
The aim of the present study was to explore the mechanism underlying the effects of a selective liver nitric oxide (NO) donor, O2-vinyl1-(pyrrolidin-1-yl)-diazen-1-ium-1,2-diolate (V-PYRRO/NO), on the gene expression of leukotriene C4 synthase (LTC4S) during hepatic ischemia/reperfusion (I/R). Adult male Sprague-Dawley rats were divided into 3 groups: Sham (control), I/R and V-PYRRO/NO + I/R groups. The liver was subjected to 1 h of partial hepatic ischemia followed by 5 h of reperfusion, saline or V-PYRRO/NO (1.06 µmol/kg/h) administered intravenously. The mRNA expression levels of LTC4S in rat liver tissue were examined by the reverse transcription-polymerase chain reaction method, the protein expression levels of nuclear factor-κB (NF-κB) p65, p50 and IκBα in liver cell lysates and nuclear extracts were detected by western blot analysis. Hepatic mRNA expression of LTC4S was lower in V-PYRRO/NO + I/R group compared to the I/R group. In addition, the protein expression levels of NF-κB p65 and p50 in the nucleus extract were lower in the V-PYRRO/NO + I/R group when compared with the I/R group. However, the IκBα protein in the 3 groups was not changed. Immunohistochemistry staining revealed that the I/R liver exhibited strong cytoplasmic and nuclear staining for NF-κB p65; however, the V-PYRRO/NO + I/R group liver presented slight cytoplasmic and nuclear staining. In conclusion, V-PYRRO/NO may downregulate LTC4S mRNA expression by inhibiting NF-κB activation independent of IκBα during hepatic I/R injury.
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Affiliation(s)
- Feng-Fang Hong
- Department of Physiology, College of Medicine, Nanchang University, Nanchang, Jiangxi 330006, P.R. China; Department of Medical Experimental Teaching, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Yi-Fan Wang
- Institute of Cancer Research, Jiangxi Academy of Medical Science, Nanchang, Jiangxi 330006, P.R. China
| | - Hui Liu
- Department of Physiology, College of Medicine, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Mei-Wen Yang
- Fuzhou Medical College, Nanchang University, Fuzhou 344000, P.R. China
| | - Shu-Long Yang
- Department of Physiology, College of Medicine, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
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Ischemic preconditioning decreased leukotriene C4 formation by depressing leukotriene C4 synthase expression and activity during hepatic I/R injury in rats. J Surg Res 2012; 178:1015-21. [DOI: 10.1016/j.jss.2012.07.061] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Revised: 07/19/2012] [Accepted: 07/23/2012] [Indexed: 12/11/2022]
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Abstract
Hepatic ischemia-reperfusion injury (IRI) occurs upon restoration of hepatic blood flow after a period of ischemia. Decreased endogenous nitric oxide (NO) production resulting in capillary luminal narrowing is central in the pathogenesis of IRI. Exogenous NO has emerged as a potential therapy for IRI based on its role in decreasing oxidative stress, cytokine release, leukocyte endothelial-adhesion and hepatic apoptosis. This review will highlight the influence of endogenous NO on hepatic IRI, role of inhaled NO in ameliorating IRI, modes of delivery, donor drugs and potential side effects of exogenous NO.
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Ma K, Zhang Y, Zhu D, Lou Y. Protective effects of asiatic acid against D-galactosamine/lipopolysaccharide-induced hepatotoxicity in hepatocytes and kupffer cells co-cultured system via redox-regulated leukotriene C4 synthase expression pathway. Eur J Pharmacol 2008; 603:98-107. [PMID: 19087874 DOI: 10.1016/j.ejphar.2008.11.054] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2008] [Revised: 11/05/2008] [Accepted: 11/24/2008] [Indexed: 01/01/2023]
Abstract
Asiatic acid is a triterpenoid component possessing antioxidative, anti-inflammatory and hepatoprotective activity. In this issue, we explored the protective effects of asiatic acid and the relative mechanism in the D-galactosamine/lipopolysaccharide (D-GalN/LPS)-induced hepatotoxicity in hepatocytes and kupffer cells co-cultured system. The cultures were pretreated with asiatic acid for 12 h, followed by D-GalN/LPS exposure for 12 h. Asiatic acid reduced aspartate aminotransferase and lactate dehydrogenase generation and increased cell viability in a concentration-dependent manner. Meanwhile, the effects of asiatic acid in leukotriene C(4) synthase (LTC(4)S) expression and cellular redox status including reactive oxygen species and GSH content were detected. The results showed that D-GalN/LPS induced the increase of reactive oxygen species followed by extracellular signal-regulated kinase 1/2 (ERK 1/2) and nuclear factor-kappaB (NF-kappaB) activation. Treatment with ERK 1/2 specific inhibitor 1,4-diamino-2,3-dicyano-1,4-bis[2-aminophenylthio] butadiene (U0126) abolished the ERK1/2 protein phosphorylation and blunted LTC(4)S expression. Reactive oxygen species signaling pathway inhibitor pyrrolidine dithiocarbamate (PDTC) inhibited reactive oxygen species generation and NF-kappaB activation, which in turn blocked LTC(4)S expression and attenuated the injury. Asiatic acid can protect the hepatocytes against D-GalN/LPS-induced hepatotoxicity. During which, the cell redox was ameliorated and increased expression of LTC(4)S was reversed by the pretreatment of asiatic acid. Taken together, asiatic acid can protect against D-GalN/LPS-induced hepatotoxicity partly via redox-regulated LTC(4)S expression pathway.
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Affiliation(s)
- Kuifen Ma
- Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences and Biochemical Pharmaceutics, Zhejiang University, Hangzhou, China
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Ma KF, Yang HY, Chen Z, Qi LY, Zhu DY, Lou YJ. Enhanced expressions and activations of leukotriene C4 synthesis enzymes in D-galactosamine/lipopolysaccharide-induced rat fulminant hepatic failure model. World J Gastroenterol 2008; 14:2748-56. [PMID: 18461660 PMCID: PMC2709038 DOI: 10.3748/wjg.14.2748] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the expression and activity of leukotriene C4 (LTC4) synthesis enzymes and their underlying relationship with cysteinyl leukotriene (cys-LT) generation in a rat fulminant hepatic failure (FHF) model induced by D-galactosamine/lipopolysaccharide (D-GalN/ LPS).
METHODS: Rats were treated with D-GalN (300 mg/kg) plus LPS (0.1 mg/kg) for 1, 3, 6, and 12 h. Enzyme immunoassay was used to determine the hepatic cys-LT content. Reverse transcription-polymerase chain reaction (RT-PCR), Western blot or immunohistochemical assay were employed to assess the expression or location of LTC4 synthesis enzymes, which belong to membrane associated proteins in eicosanoid and glutathione (MAPEG) metabolism superfamily. Activity of LTC4 synthesis enzymes was evaluated by determination of the products of LTA4 after incubation with liver microsomes using high performance liquid chromatography (HPLC).
RESULTS: Livers were injured after treatment with D-GalN/LPS, accompanied by cys-LT accumulation at the prophase of liver injury. Both LTC4 synthase (LTC4S) and microsomal glutathione-S-transferase (mGST) 2 were expressed in the rat liver, while the latter was specifically located in hepatocytes. Their mRNA and protein expressions were up-regulated at an earlier phase after treatment with D-GalN/LPS. Meantime, a higher activity of LTC4 synthesis enzymes was detected, although the activity of LTC4S played the main role in this case.
CONCLUSION: The expression and activity of both LTC4S and mGST2 are up regulated in a rat FHF model, which are, at least, partly responsible for cys-LT hepatic accumulation.
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