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Lv H, Yu J, Qian X, Shu J, Qian Q, Shen L, Shi D, Tao Z, Fan G, Zhuang B, Lu B. USP7 upregulated by TGF-β1 promotes ferroptosis via inhibiting LATS1-YAP axis in sepsis-induced acute lung injury. iScience 2024; 27:109667. [PMID: 38966570 PMCID: PMC11223090 DOI: 10.1016/j.isci.2024.109667] [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: 10/10/2023] [Revised: 12/27/2023] [Accepted: 04/02/2024] [Indexed: 07/06/2024] Open
Abstract
Our work aimed to investigate the interactive roles of transforming growth factor β1 (TGF-β1), ubiquitin-specific-processing protease 7 (USP7), and Yes-associated protein (YAP) in ferroptosis during sepsis-secondary acute lung injury (ALI). Our study demonstrated that ferroptosis was aggravated by TGF-β1 in both cellular and animal models of acute lung injury. Additionally, YAP upregulated glutathione peroxidase 4 (GPX4) and SLC7A11 by regulating the binding of TEAD4 to GPX4/SLC7A11 promoters. Furthermore, large tumor suppressor kinase 1 (LATS1) knockdown resulted in YAP expression stimulation, while USP7 downregulated YAP via deubiquitinating and stabilizing LATS1/2. YAP overexpression or USP7/LATS1 silencing reduced ferroptosis process, which regulated YAP through a feedback loop. However, TGF-β1 annulled the repression of ferroptosis by YAP overexpression or LATS1/USP7 knockdown. By elucidating the molecular interactions between TGF-β1, USP7, LATS1/2, and YAP, we identified a new regulatory axis of ferroptosis in sepsis-secondary ALI. Our study sheds light on the pathophysiology of ferroptosis and proposes a potential therapeutic approach for sepsis-induced ALI.
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Affiliation(s)
- Hong Lv
- Department of Pulmonary and Critical Care Medicine, Taicang TCM Hospital, Affliated to Nanjing University of Chinese Medicine, Taicang, Jiangsu Province 215499, P.R. China
| | - Jing Yu
- Department of Pulmonary and Critical Care Medicine, Taicang TCM Hospital, Affliated to Nanjing University of Chinese Medicine, Taicang, Jiangsu Province 215499, P.R. China
| | - Xingjia Qian
- Department of Pulmonary and Critical Care Medicine, Taicang TCM Hospital, Affliated to Nanjing University of Chinese Medicine, Taicang, Jiangsu Province 215499, P.R. China
| | - Jun Shu
- Department of Pulmonary and Critical Care Medicine, Taicang TCM Hospital, Affliated to Nanjing University of Chinese Medicine, Taicang, Jiangsu Province 215499, P.R. China
| | - Qiuhong Qian
- Department of Pulmonary and Critical Care Medicine, Taicang TCM Hospital, Affliated to Nanjing University of Chinese Medicine, Taicang, Jiangsu Province 215499, P.R. China
| | - Luhong Shen
- Department of Pulmonary and Critical Care Medicine, Taicang TCM Hospital, Affliated to Nanjing University of Chinese Medicine, Taicang, Jiangsu Province 215499, P.R. China
| | - Dongfang Shi
- Department of Pulmonary and Critical Care Medicine, Taicang TCM Hospital, Affliated to Nanjing University of Chinese Medicine, Taicang, Jiangsu Province 215499, P.R. China
| | - Zhengzheng Tao
- Department of Pulmonary and Critical Care Medicine, Taicang TCM Hospital, Affliated to Nanjing University of Chinese Medicine, Taicang, Jiangsu Province 215499, P.R. China
| | - Guiqin Fan
- Department of Pulmonary and Critical Care Medicine, Taicang TCM Hospital, Affliated to Nanjing University of Chinese Medicine, Taicang, Jiangsu Province 215499, P.R. China
- Soochow University School of Medicine, Suzhou, Jiangsu Province 215031, P.R. China
| | - Bufeng Zhuang
- Department of Thoracic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, P.R. China
| | - Bing Lu
- Department of Pulmonary and Critical Care Medicine, Taicang TCM Hospital, Affliated to Nanjing University of Chinese Medicine, Taicang, Jiangsu Province 215499, P.R. China
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Wang W, Xu R, He P, Xiong Y, Zhao H, Fu X, Lin J, Ye L. Role of ATF3 triggering M2 macrophage polarization to protect against the inflammatory injury of sepsis through ILF3/NEAT1 axis. Mol Med 2024; 30:30. [PMID: 38395749 PMCID: PMC10893701 DOI: 10.1186/s10020-023-00711-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 08/14/2023] [Indexed: 02/25/2024] Open
Abstract
BACKGROUND Sepsis is a systemic inflammatory response which is frequently associated with acute lung injury (ALI). Activating transcription factor 3 (ATF3) promotes M2 polarization, however, the biological effects of ATF3 on macrophage polarization in sepsis remain undefined. METHODS LPS-stimulated macrophages and a mouse model of cecal ligation and puncture (CLP)-induced sepsis were generated as in vitro and in vivo models, respectively. qRT-PCR and western blot were used to detect the expression of ATF3, ILF3, NEAT1 and other markers. The phenotypes of macrophages were monitored by flow cytometry, and cytokine secretion was measured by ELISA assay. The association between ILF3 and NEAT1 was validated by RIP and RNA pull-down assays. RNA stability assay was employed to assess NEAT1 stability. Bioinformatic analysis, luciferase reporter and ChIP assays were used to study the interaction between ATF3 and ILF3 promoter. Histological changes of lung tissues were assessed by H&E and IHC analysis. Apoptosis in lungs was monitored by TUNEL assay. RESULTS ATF3 was downregulated, but ILF3 and NEAT1 were upregulated in PBMCs of septic patients, as well as in LPS-stimulated RAW264.7 cells. Overexpression of ATF3 or silencing of ILF3 promoted M2 polarization of RAW264.7 cells via regulating NEAT1. Mechanistically, ILF3 was required for the stabilization of NEAT1 through direct interaction, and ATF3 was a transcriptional repressor of ILF3. ATF3 facilitated M2 polarization in LPS-stimulated macrophages and CLP-induced septic lung injury via ILF3/NEAT1 axis. CONCLUSION ATF3 triggers M2 macrophage polarization to protect against the inflammatory injury of sepsis through ILF3/NEAT1 axis.
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Affiliation(s)
- Wei Wang
- Geriatric Medicine Department, The Fifth Affiliated Hospital of Southern Medical University, No. 566, Congcheng Avenue, Conghua District, Guangzhou, 510920, Guangdong Province, People's Republic of China.
| | - Rongli Xu
- Department of Cardiology, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, Hainan Province, People's Republic of China
| | - Ping He
- Department of Emergency, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, Hainan Province, People's Republic of China
| | - Yuqing Xiong
- Department of Emergency, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, Hainan Province, People's Republic of China
| | - Haomiao Zhao
- Department of Emergency, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, Hainan Province, People's Republic of China
| | - Xuewei Fu
- Department of Emergency, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, Hainan Province, People's Republic of China
| | - Jie Lin
- Department of Emergency, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, Hainan Province, People's Republic of China
| | - Lijiao Ye
- Department of Emergency, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, Hainan Province, People's Republic of China
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Lee H, Krishnan M, Kim M, Yoon YK, Kim Y. Rhamnetin, a Natural Flavonoid, Ameliorates Organ Damage in a Mouse Model of Carbapenem-Resistant Acinetobacter baumannii-Induced Sepsis. Int J Mol Sci 2022; 23:12895. [PMID: 36361685 PMCID: PMC9656386 DOI: 10.3390/ijms232112895] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 10/16/2022] [Accepted: 10/24/2022] [Indexed: 11/15/2023] Open
Abstract
In sepsis, the persistence of uncontrolled inflammatory response of infected host cells eventually leads to severe lung and organ failure and, ultimately, death. Carbapenem-resistant Acinetobacter baumannii (CRAB), causative bacteria of sepsis and lung failure in acute cases, belongs to a group of critical pathogens that cannot be eradicated using the currently available antibiotics. This underlines the necessity of developing new modes of therapeutics that can control sepsis at the initial stages. In this study, we investigated the anti-inflammatory activities in vitro and in vivo and the antiseptic effects of rhamnetin, a naturally occurring flavonoid. We found that among its isoforms, the potency of rhamnetin was less explored but rhamnetin possessed superior anti-inflammatory activity with least cytotoxicity. Rhamnetin showed significant anti-inflammatory effects in lipopolysaccharide-, CRAB-, and Escherichia coli (E. coli)-stimulated mouse macrophages by inhibiting the release of interleukin-6 and nitric oxide. In a mouse model of sepsis infected with clinically isolated CRAB or E. coli, rhamnetin significantly reduced the bacterial burden in the organs. In addition, normalized pro-inflammatory cytokine levels in lung lysates and histological analysis of lung tissue indicated alleviation of lung damage. This study implies that a potent natural product such as rhamnetin could be a future therapeutic for treating carbapenem-resistant gram-negative sepsis.
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Affiliation(s)
- Hyeju Lee
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
| | - Manigandan Krishnan
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
| | - Minju Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
| | - Young Kyung Yoon
- Division of Infectious Diseases, Department of Internal Medicine, College of Medicine, Korea University Anam Hospital, Korea University, Seoul 02841, Korea
| | - Yangmee Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
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Lee CY, Chen SP, Huang-Liu R, Gau SY, Li YC, Chen CJ, Chen WY, Wu CN, Kuan YH. Fucoxanthin decreases lipopolysaccharide-induced acute lung injury through the inhibition of RhoA activation and the NF-κB pathway. ENVIRONMENTAL TOXICOLOGY 2022; 37:2214-2222. [PMID: 35616142 DOI: 10.1002/tox.23587] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/03/2022] [Accepted: 05/14/2022] [Indexed: 06/15/2023]
Abstract
Fucoxanthin is a natural pigment widely distributed in macroalgae and microalgae. An orange-colored xanthophyll, it has several bioactive effects, including anticancer, anti-obesity, oxidative stress reduction, and anti-inflammation. Acute lung injury (ALI) caused by acute infections or injurious stimuli to the lung tissues is a severe pulmonary inflammatory disease. To date, no evidence has shown ALI to be reduced by fucoxanthin through activation of Ras homolog family member A (RhoA) and the nuclear factor (NF)-κB pathway in lipopolysaccharide (LPS)-treated mice. Pretreatment with fucoxanthin inhibited histopathological changes in lung tissues and neutrophil infiltration into bronchoalveolar lavage fluid induced by LPS in ALI mice. Moreover, LPS-induced proinflammatory cytokine expression and neutrophil infiltration were inhibited by fucoxanthin in a concentration-dependent manner. Pretreatment of mice with fucoxanthin inhibited NF-κB phosphorylation and IκB degradation in the lungs of mice with LPS-induced ALI. We further found that phosphorylation of Akt and p38 mitogen-activated protein KINASE (MAPK) was inhibited by fucoxanthin. By contrast, the phosphorylation of extracellular signal-regulated kinase and c-Jun N-terminal kinase was not inhibited by fucoxanthin. Furthermore, we found that the activation of RhoA was inhibited by fucoxanthin in LPS-induced ALI. On the basis of these results, we propose that fucoxanthin disrupts the RhoA activation-mediated phosphorylation of Akt and p38 MAPK, leading to NF-κB activation in mice with LPS-induced ALI.
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Affiliation(s)
- Chien-Ying Lee
- Department of Pharmacology, School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Pharmacy, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Shih-Pin Chen
- Department of Internal Medicine, School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Rosa Huang-Liu
- School of Nutrition, Chung Shan Medical University, Taichung, Taiwan
| | - Shuo-Yan Gau
- School of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Yi-Ching Li
- Department of Pharmacology, School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Pharmacy, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Chun-Jung Chen
- Department of Education and Research, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Wen-Ying Chen
- Department of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan
| | - Chun-Nan Wu
- Department of Pharmacy, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Yu-Hsiang Kuan
- Department of Pharmacology, School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Pharmacy, Chung Shan Medical University Hospital, Taichung, Taiwan
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Combined Therapy with Ivermectin and Doxycycline can effectively alleviate the Cytokine Storm of COVID-19 Infection amid Vaccination Drive: A Narrative Review. J Infect Public Health 2022; 15:566-572. [PMID: 35462191 PMCID: PMC8964533 DOI: 10.1016/j.jiph.2022.03.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 03/23/2022] [Accepted: 03/24/2022] [Indexed: 12/22/2022] Open
Abstract
An unprecedented global health crisis has developed due to the emergence of the mysterious coronavirus-2 of the severe acute respiratory syndrome, which has resulted in millions of deaths around the globe, as no therapy could control the ‘cytokine storm’. Consequently, many vaccines have been developed and several others are being developed for this infection. Although most of the approved vaccines have been highly effective, many developing, and economically poor countries are still deprived of vaccination against SARS-CoV-2 due to the unequal distribution of vaccines worldwide. Furthermore, the uncertainty about the effectiveness of the available vaccines against the emerging mutants and variants also remains a matter of concern. Due to the multistep pathogenesis and unique features, combination therapy using safe immunomodulatory and antiviral drugs should be considered as the most effective and acceptable therapeutic regimen for this infection. Based on a thorough assessment of the literature, it was determined that it would be interesting to study the therapeutic potential of ivermectin and doxycycline, given their roles in several biological pathways involved in SARS CoV-2 pathogenesis. Following that, a comprehensive literature search was undertaken using Scopus, Web of Science, and Pubmed, depending on the inclusion and exclusion criteria. The present study provides a mechanism and comprehensive report, highlighting the role of combined therapy with ivermectin and doxycycline in alleviating the ‘cytokine storm’ of COVID-19 infection.
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Seabuckthorn Berries Extract Attenuates Pulmonary Vascular Hyperpermeability in Lipopolysaccharide-Induced Acute Lung Injury in Mice. Chin J Integr Med 2021; 28:1081-1087. [PMID: 34874520 PMCID: PMC8649316 DOI: 10.1007/s11655-021-3346-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/09/2021] [Indexed: 11/06/2022]
Abstract
Objective To investigate the effect of seabuckthorn berries extract (SBE) on pulmonary vascular hyperpermeability in the mice model of acute lung injury (ALI) induced by lipopolysaccharide (LPS). Methods Sixty Kunming mice were allocated into 6 groups by a random number table, including control, LPS, dexamethasone (Dex, 1 mg/kg), and 120, 240 and 480 mg/kg SBE groups, 10 mice in each group. Except the control group, mice were pre-treated with Dex and SBE, respectively, for 7 days before LPS was intraperitoneally injected to induce ALI. Pulmonary vascular hyperpermeability was evaluated by histopathologic observation and transvascular leakage determination. Tumor necrosis factor alpha (TNF-α) and interleukin-6 (IL-6) levels in serum were measured using enzyme-linked immunosorbent assay. The expression of nuclear factor-kappa B (NF-κB) p65 in lung cells was determined by immunofluorescence analysis. The contents of cytoplasmic inhibitor of nuclear factor-κB kinase (IKK) and nuclear p65, as well as downstream proteins of E-selectin (CD62E) and intercellular adhesion molecule-1 (ICAM-1), were determined using Western blot analysis. Results Histopathological observation confirmed SBE treatment alleviated morphological lesion induced by LPS. Compared with the LPS group, 480 mg/kg SBE significantly decreased the water content of lung, Evans blue accumulation in lung tissue, and protein concentration and neutrophils count in bronchoalveolar lavage fluid (P<0.01); moreover, 480 mg/kg SBE significantly suppressed release of TNF-α and IL-6, and down-regulated expressions of IKK, nuclear p65, ICAM-1 and CD62E (P<0.01). Conclusion SBE maintained alveolar-capillary barrier integrity under endotoxin challenge in mice by suppressing the key factors in the pathogenesis of ALI. Electronic Supplementary Material Supplementary material (Appendix 1) is available in the online version of this article at 10.1007/s11655-021-3346-1.
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Shen Y, Zhao S, Hua M. Long non-coding RNA LINC01194 promotes the inflammatory response and apoptosis of LPS-treated MLE 12 cells through the miR-203a-3p /MIP-2 axis. Can J Physiol Pharmacol 2021; 100:402-411. [PMID: 34855515 DOI: 10.1139/cjpp-2021-0255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Acute lung injury (ALI) induced by bacteria LPS is characterized by the upregulation of the apoptosis rate of tissue cells and aggravation of inflammatory response. Although many studies have focused on the pathogenesis of this disease, its mechanism remains unknown. This study examined the regulatory role of long non-coding RNA (lncRNA) LINC01194 in the progression of ALI through various bioinformatics analyses and experimental work, including ELISA assay, dual-luciferase reporter assay, biotinylated RNA pull-down assay, and western blot analysis. The result showed that the LINC01194 was overexpressed in the ALI-induced mice model. We observed a significant upregulation of LINC01194 in LPS-treated Mouse lung epithelial type II cells (MLE-12 cells) after 24 hrs of induction. Bioinformatics analysis, Elisa assay, qRT-PCR analysis, Biotinylated RNA pull-down assay, apoptosis test, and western blot analysis demonstrated that the LINC01194 could act as a miR-203a-3p sponge to activate the inflammatory response in LPS-induced ALI model through post-transcriptional upregulation of MIP-2. We showed that LINC01194 regulates the inflammatory response and apoptosis of LPS-induced mice and MLE-12 cells via the miR-203a-3p/MIP-2 axis. LINC01194 could be a potential biomarker for early diagnosis and the treatment of ALI.
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Affiliation(s)
- Yuyao Shen
- the Affiliated Yantai Yuhuangding Hospital of Qingdao University, Department of Respiratory Medicine, Yantai, China;
| | | | - Minglei Hua
- Xincheng Branch of Zaozhuang Municipal Hospital, Zaozhuang, China;
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Inhibition of microsomal prostaglandin E synthase-1 ameliorates acute lung injury in mice. J Transl Med 2021; 19:340. [PMID: 34372885 PMCID: PMC8351447 DOI: 10.1186/s12967-021-03016-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 07/29/2021] [Indexed: 11/23/2022] Open
Abstract
Background To examine the effects of BI 1029539 (GS-248), a novel selective human microsomal prostaglandin E synthase-1 (mPGES-1) inhibitor, in experimental models of acute lung injury (ALI) and sepsis in transgenic mice constitutively expressing the mPGES1 (Ptges) humanized allele. Methods Series 1: Lipopolysaccharide (LPS)-induced ALI. Mice were randomized to receive vehicle, BI 1029539, or celecoxib. Series 2: Cecal ligation and puncture-induced sepsis. Mice were randomized to receive vehicle or BI 1029539. Results Series 1: BI 1029539 or celecoxib reduced LPS-induced lung injury, with reduction in neutrophil influx, protein content, TNF-ɑ, IL-1β and PGE2 levels in bronchoalveolar lavage (BAL), myeloperoxidase activity, expression of mPGES-1, cyclooxygenase (COX)-2 and intracellular adhesion molecule in lung tissue compared with vehicle-treated mice. Notably, prostacyclin (PGI2) BAL concentration was only lowered in celecoxib-treated mice. Series 2: BI 1029539 significantly reduced sepsis-induced BAL inflammatory cell recruitment, lung injury score and lung expression of mPGES-1 and inducible nitric oxide synthase. Treatment with BI 1029539 also significantly prolonged survival of mice with severe sepsis. Anti-inflammatory and anti-migratory effect of BI 1029539 was confirmed in peripheral blood leukocytes from healthy volunteers. Conclusions BI 1029539 ameliorates leukocyte infiltration and lung injury resulting from both endotoxin-induced and sepsis-induced lung injury. Supplementary Information The online version contains supplementary material available at 10.1186/s12967-021-03016-9.
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Hydrogen alleviates cell damage and acute lung injury in sepsis via PINK1/Parkin-mediated mitophagy. Inflamm Res 2021; 70:915-930. [PMID: 34244821 DOI: 10.1007/s00011-021-01481-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/05/2021] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Multiple organ failure (MOF) is the main cause of early death in septic shock. Lungs are among the organs that are affected in MOF, resulting in acute lung injury. Inflammation is an important factor that causes immune cell dysfunction in the pathogenesis of sepsis. Autophagy is involved in the process of inflammation and also occurs in response to cell and tissue injury in several diseases. We previously demonstrated that hydrogen alleviated the inflammation-induced cell injury and organ damage in septic mice. AIM The focus of the present study was to elucidate whether mitophagy mediates the inflammatory response or oxidative injury in sepsis in vitro and in vivo. Furthermore, we evaluated the role of mitophagy in the protective effects of hydrogen against cell injury or organ dysfunction in sepsis. METHOD RAW 264.7 macrophages induced by lipopolysaccharide (LPS) were used as an in vitro model for inflammation, and cecal ligation and puncture (CLP)-induced acute lung injury mice were used as an in vivo model for sepsis. The key protein associated with mitophagy, PTEN-induced putative kinase 1 (PINK1), was knocked down by PINK1 shRNA transfection in RAW 264.7 macrophages or mice. RESULTS Hydrogen ameliorated cell injury and enhanced mitophagy in macrophages stimulated by LPS. PINK1 was required for the mitigation of the cell impairment in LPS-stimulated macrophages by hydrogen treatment. PINK1 knockdown abrogated the beneficial effects of hydrogen on mitophagy in LPS-stimulated macrophages. Hydrogen inhibited acute lung injury in CLP mice via activation of PINK1-mediated mitophagy. CONCLUSION These results suggest that PINK1-mediated mitophagy plays a key role in the protective effects of hydrogen against cell injury in LPS-induced inflammation and CLP-induced acute lung injury.
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Patel A, Khande H, Periasamy H, Mokale S. Immunomodulatory Effect of Doxycycline Ameliorates Systemic and Pulmonary Inflammation in a Murine Polymicrobial Sepsis Model. Inflammation 2021; 43:1035-1043. [PMID: 31955291 PMCID: PMC7224120 DOI: 10.1007/s10753-020-01188-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Acute lung injury is an inflammatory condition developed after severe sepsis in response to excessive secretion of pro-inflammatory cytokines. Doxycycline is widely reported to possess immunomodulatory activity through inhibition of various inflammatory pathways. Considering the broad spectrum of anti-inflammatory activity, protective effect of doxycycline was evaluated in clinically relevant murine polymicrobial sepsis model induced by caecal ligation and puncture (CLP). In this model, sepsis is accompanied with infection and therefore ceftriaxone at sub-protective dose was combined to retard the bacterial growth. Three hours after CLP challenge, mice were administered vehicle, ceftriaxone (100 mg/kg subcutaneously) alone and in combination with immunomodulatory dose of doxycycline (50 mg/kg, intraperitoneal) and survival were monitored for 5 days. Bacterial count in blood and peritoneal fluid along with cytokines [interleukin (IL)-6, IL-1β, tumour necrosis factor (TNF)-α] and myeloperoxidase (MPO) in plasma and lung homogenate were measured at 18 h post-CLP. Plasma glutathione (GSH) was also determined. Doxycycline in presence of ceftriaxone improved survival of septic mice by significantly reducing the plasma and lung pro-inflammatory cytokines and MPO levels. It also increased plasma GSH levels. Doxycycline did not improve antibacterial effect of ceftriaxone in combination, suggesting that the protective effect of doxycycline was due to its immunomodulatory activity. Doxycycline in the presence of ceftriaxone demonstrated improved survival of septic mice by modulating the immune response.
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Affiliation(s)
- Anasuya Patel
- Y.B. Chavan College of Pharmacy, Dr. Rafiq Zakaria Marg, Aurangabad, Maharashtra, India
- Wockhardt Research Centre, Aurangabad, Maharashtra, India
| | - Hemant Khande
- Wockhardt Research Centre, Aurangabad, Maharashtra, India
| | | | - Santosh Mokale
- Y.B. Chavan College of Pharmacy, Dr. Rafiq Zakaria Marg, Aurangabad, Maharashtra, India.
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Anti-inflammatory Effects of Statins in Lung Vascular Pathology: From Basic Science to Clinical Trials. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1303:33-56. [PMID: 33788186 DOI: 10.1007/978-3-030-63046-1_3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
HMG-CoA reductase inhibitors (or statins) are cholesterol-lowering drugs and are among the most widely prescribed medications in the United States. Statins exhibit pleiotropic effects that extend beyond cholesterol reduction including anti-atherosclerotic, antiproliferative, anti-inflammatory, and antithrombotic effects. Over the last 20 years, statins have been studied and examined in pulmonary vascular disorders, including both chronic pulmonary vascular disease such as pulmonary hypertension, and acute pulmonary vascular endothelial injury such as acute lung injury. In both research and clinical settings, statins have demonstrated promising vascular protection through modulation of the endothelium, attenuation of vascular leak, and promotion of endothelial repair following lung inflammation. This chapter provides a summary of the rapidly changing literature, summarizes the anti-inflammatory mechanism of statins on pulmonary vascular disorders, and explores clinical evidence for statins as a potential therapeutic approach to modulation of the endothelium as well as a means to broaden our understanding of pulmonary vasculopathy pathophysiology.
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12
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Deng Q, Pan B, Alam HB, Liang Y, Wu Z, Liu B, Mor-Vaknin N, Duan X, Williams AM, Tian Y, Zhang J, Li Y. Citrullinated Histone H3 as a Therapeutic Target for Endotoxic Shock in Mice. Front Immunol 2020; 10:2957. [PMID: 31998291 PMCID: PMC6962130 DOI: 10.3389/fimmu.2019.02957] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 12/02/2019] [Indexed: 12/16/2022] Open
Abstract
Sepsis results in millions of deaths every year, with acute lung injury (ALI) being one of the leading causes of mortality in septic patients. As neutrophil extracellular traps (NETs) are abundant in sepsis, neutralizing components of NETs may be a useful strategy to improve outcomes of sepsis. Citrullinated histone H3 (CitH3) has been recently shown to be involved in the NET formation. In this study, we demonstrate that CitH3 damages human umbilical vein endothelial cells (HUVECs) and potentiates NET formation through a positive feedback mechanism. We developed a novel CitH3 monoclonal antibody to target peptidylarginine deiminase (PAD) 2 and PAD 4 generated CitH3. In a mouse model of lethal lipopolysaccharide (LPS) induced shock, neutralizing CitH3 with the newly developed anti-CitH3 monoclonal antibody attenuates inflammatory responses, ameliorates ALI, and improves survival. Our study suggests that effectively blocking circulating CitH3 might be a potential therapeutic method for the treatment of endotoxemia.
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Affiliation(s)
- Qiufang Deng
- Xiangya Hospital, Central South University, Changsha, China.,Department of Surgery, University of Michigan, Ann Arbor, MI, United States
| | - Baihong Pan
- Xiangya Hospital, Central South University, Changsha, China.,Department of Surgery, University of Michigan, Ann Arbor, MI, United States
| | - Hasan B Alam
- Department of Surgery, University of Michigan, Ann Arbor, MI, United States
| | - Yingjian Liang
- Department of Surgery, University of Michigan, Ann Arbor, MI, United States.,The First Hospital, China Medical University, Shenyang, China
| | - Zhenyu Wu
- Xiangya Hospital, Central South University, Changsha, China.,Department of Surgery, University of Michigan, Ann Arbor, MI, United States
| | - Baoling Liu
- Department of Surgery, University of Michigan, Ann Arbor, MI, United States
| | - Nirit Mor-Vaknin
- Division of Infectious Diseases, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
| | - Xiuzhen Duan
- Department of Pathology, Loyola University Medical Center, Maywood, IL, United States
| | - Aaron M Williams
- Department of Surgery, University of Michigan, Ann Arbor, MI, United States
| | - Yuzi Tian
- Xiangya Hospital, Central South University, Changsha, China.,Department of Surgery, University of Michigan, Ann Arbor, MI, United States
| | - Justin Zhang
- Department of Surgery, University of Michigan, Ann Arbor, MI, United States
| | - Yongqing Li
- Department of Surgery, University of Michigan, Ann Arbor, MI, United States
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13
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Ahmad S, Singh P, Sharma A, Arora S, Shriwash N, Rahmani AH, Almatroodi SA, Manda K, Dohare R, Syed MA. Transcriptome Meta-Analysis Deciphers a Dysregulation in Immune Response-Associated Gene Signatures during Sepsis. Genes (Basel) 2019; 10:genes10121005. [PMID: 31817302 PMCID: PMC6947644 DOI: 10.3390/genes10121005] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Revised: 11/28/2019] [Accepted: 12/02/2019] [Indexed: 12/20/2022] Open
Abstract
Sepsis is a life-threatening disease induced by a systemic inflammatory response, which leads to organ dysfunction and mortality. In sepsis, the host immune response is depressed and unable to cope with infection; no drug is currently available to treat this. The lungs are frequently the starting point for sepsis. This study aimed to identify potential genes for diagnostics and therapeutic purposes in sepsis by a comprehensive bioinformatics analysis. Our criteria are to unravel sepsis-associated signature genes from gene expression datasets. Differentially expressed genes (DEGs) were identified from samples of sepsis patients using a meta-analysis and then further subjected to functional enrichment and protein‒protein interaction (PPI) network analysis for examining their potential functions. Finally, the expression of the topmost upregulated genes (ARG1, IL1R2, ELANE, MMP9) was quantified by reverse transcriptase-PCR (RT-PCR), and myeloperoxidase (MPO) expression was confirmed by immunohistochemistry (IHC) staining in the lungs of a well-established sepsis mouse model. We found that all the four genes were upregulated in semiquantitative RT-PCR studies; however, MMP9 showed a nonsignificant increase in expression. MPO staining showed strong immunoreactivity in sepsis as compared to the control. This study demonstrates the role of significant and widespread immune activation (IL1R2, MMP9), along with oxidative stress (ARG1) and the recruitment of neutrophils, in sepsis (ELANE, MPO).
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Affiliation(s)
- Shaniya Ahmad
- Translational Research Lab, Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India; (S.A.); (A.S.); (S.A.)
| | - Prithvi Singh
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi 110025, India;
| | - Archana Sharma
- Translational Research Lab, Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India; (S.A.); (A.S.); (S.A.)
| | - Shweta Arora
- Translational Research Lab, Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India; (S.A.); (A.S.); (S.A.)
| | - Nitesh Shriwash
- Department of Computer Science, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India;
| | - Arshad Husain Rahmani
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, Buraidah 51452, Saudi Arabia; (A.H.R.); (S.A.A.)
| | - Saleh A. Almatroodi
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, Buraidah 51452, Saudi Arabia; (A.H.R.); (S.A.A.)
| | - Kailash Manda
- Institute of Nuclear Medicine and Applied Sciences, Defence Research Development Organization, New Delhi 110054, India;
| | - Ravins Dohare
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi 110025, India;
- Correspondence: (R.D.); (M.A.S.); Tel.: +91-817-887-5779 (R.D.); +91-995-378-6440 (M.A.S.)
| | - Mansoor Ali Syed
- Translational Research Lab, Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India; (S.A.); (A.S.); (S.A.)
- Correspondence: (R.D.); (M.A.S.); Tel.: +91-817-887-5779 (R.D.); +91-995-378-6440 (M.A.S.)
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14
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Deng Q, Zhao T, Pan B, Dennahy IS, Duan X, Williams AM, Liu B, Lin N, Bhatti UF, Chen E, Alam HB, Li Y. Protective Effect of Tubastatin A in CLP-Induced Lethal Sepsis. Inflammation 2019; 41:2101-2109. [PMID: 30047002 DOI: 10.1007/s10753-018-0853-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have found earlier that Tubastatin A (TubA), a selective inhibitor of histone deacetylase 6 (HDAC6), improves survival in a mouse model of lethal cecal ligation and puncture (CLP)-induced sepsis. However, the underlying mechanisms have not been fully established. This study sought to test the hypothesis that TubA could affect both lung and splenic functions. C57BL/6J mice were subjected to CLP, and randomized to receive either TubA (70 mg/kg) dissolved in dimethyl sulfoxide (DMSO), or DMSO alone, 1 h following CLP. Sham animals acted as control. Twenty-four hours later, lung tissue was harvested for pathological examination, and splenic tissue was harvested for bacterial colonization. In a parallel study, the spleen was collected 48 h following CLP, and single cell suspension was prepared. Splenocytes then underwent flow cytometry to analyze the immune cell population. RAW264.7 macrophages were treated with lipopolysaccharide (LPS) with or without the presence of TubA (10 μM) at 37 °C for 3 h to assess the effect on macrophage phagocytosis. We found that acute lung injury secondary to lethal sepsis was attenuated by TubA. Treatment with TubA restored the percentage of B lymphocytes, and significantly increased percentages of innate immune cells and macrophages compared to the vehicle-treated CLP group. Moreover, TubA significantly decreased the bacterial load in the spleen, and improved the phagocytic ability of RAW264.7 murine macrophages in vitro. Such findings may help to explain the beneficial effects of TubA treatment in a model of lethal sepsis, as previously reported.
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Affiliation(s)
- Qiufang Deng
- Department of Surgery, North Campus Research Complex, University of Michigan, Rm 363N, Bldg 26, 2800 Plymouth Road, Ann Arbor, MI, 48109, USA.,Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ting Zhao
- Department of Surgery, North Campus Research Complex, University of Michigan, Rm 363N, Bldg 26, 2800 Plymouth Road, Ann Arbor, MI, 48109, USA
| | - Baihong Pan
- Department of Surgery, North Campus Research Complex, University of Michigan, Rm 363N, Bldg 26, 2800 Plymouth Road, Ann Arbor, MI, 48109, USA.,Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Isabel S Dennahy
- Department of Surgery, North Campus Research Complex, University of Michigan, Rm 363N, Bldg 26, 2800 Plymouth Road, Ann Arbor, MI, 48109, USA
| | - Xiuzhen Duan
- Department of Pathology, Loyola University Medical Center, Maywood, IL, USA
| | - Aaron M Williams
- Department of Surgery, North Campus Research Complex, University of Michigan, Rm 363N, Bldg 26, 2800 Plymouth Road, Ann Arbor, MI, 48109, USA
| | - Baoling Liu
- Department of Surgery, North Campus Research Complex, University of Michigan, Rm 363N, Bldg 26, 2800 Plymouth Road, Ann Arbor, MI, 48109, USA
| | - Nan Lin
- Department of Human Genetics/Epidemiology, University of Michigan, Ann Arbor, MI, USA
| | - Umar F Bhatti
- Department of Surgery, North Campus Research Complex, University of Michigan, Rm 363N, Bldg 26, 2800 Plymouth Road, Ann Arbor, MI, 48109, USA
| | - Eric Chen
- Department of Surgery, North Campus Research Complex, University of Michigan, Rm 363N, Bldg 26, 2800 Plymouth Road, Ann Arbor, MI, 48109, USA
| | - Hasan B Alam
- Department of Surgery, North Campus Research Complex, University of Michigan, Rm 363N, Bldg 26, 2800 Plymouth Road, Ann Arbor, MI, 48109, USA
| | - Yongqing Li
- Department of Surgery, North Campus Research Complex, University of Michigan, Rm 363N, Bldg 26, 2800 Plymouth Road, Ann Arbor, MI, 48109, USA.
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15
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Yuan X, Zhu J, Kang Q, He X, Guo D. Protective Effect of Hesperidin Against Sepsis-Induced Lung Injury by Inducing the Heat-Stable Protein 70 (Hsp70)/Toll-Like Receptor 4 (TLR4)/ Myeloid Differentiation Primary Response 88 (MyD88) Pathway. Med Sci Monit 2019; 25:107-114. [PMID: 30608918 PMCID: PMC6329256 DOI: 10.12659/msm.912490] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Background Sepsis-induced lung injury is associated with high mortality. The present investigation evaluated the protective effect of hesperidin against sepsis-induced lung injury and also postulates the possible mechanism of its action. Material/Methods Lung injury was induced by sepsis in all animals, in which sepsis was produced by cecal ligation and puncture (CLP). Animals were treated with hesperidin 10 and 20 mg/kg i.v. 30 min after the surgery. Oxygenation index and lung injury score were determined and levels of pro-inflammatory mediators and markers of oxidative stress were also estimated in the lung tissues. Moreover, expression of caspase-3, B-cell lymphoma (Bcl-2), Toll-like receptor 4 (TLR4), heat-stable protein 70 (Hsp70) and myeloid differentiation primary response 88 (MyD88) protein was estimated by Western blot assay and immunofluorescence assay. Results Hesperidin attenuated the partial pressure of arterial oxygen/fraction of inspired oxygen (PaO2/FiO2) ratio and lung injury score in CLP-induced lung injury mice. There was a significant (p<0.01) decrease in the level of pro-inflammatory mediators in the lung tissue of CLP-induced lung injury mice. Moreover, markers of oxidative stress were attenuated in the hesperidin-treated group. Treatment with hesperidin attenuated the expression of caspase-3, Bcl-2, TLR4, Hsp70, and MyD88 protein in the lung tissue of CLP-induced lung injury mice. Conclusions Hesperidin protects against lung injury by attenuating the Hsp70/TLR4/MyD88 pathway in CLP-induced lung injury mice.
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Affiliation(s)
- Xiaoyan Yuan
- Ningxia Medical University, Yinchuan, Ningxia, China (mainland).,Department of Emergency Medicine, Shanghai Gongli Hospital, Second Military Medical University, Shanghai, China (mainland)
| | - Jinyuan Zhu
- Ningxia Medical University, Yinchuan, Ningxia, China (mainland).,General Hospital of Ningxia Medical University, Yinchuan, Ningxia, China (mainland)
| | - Qi Kang
- Department of Emergency Medicine, Shanghai Gongli Hospital, Second Military Medical University, Shanghai, China (mainland)
| | - Xiaoxue He
- Medical Laboratory, Shanghai Gongli Hospital, Second Military Medical University, Shanghai, China (mainland)
| | - Dongfeng Guo
- Department of Emergency Medicine, Shanghai Gongli Hospital, Second Military Medical University, Shanghai, China (mainland)
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16
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Li Q, Feng Y, He W, Wang L, Wang R, Dong L, Wang C. Post-screening characterisation and in vivo evaluation of an anti-inflammatory polysaccharide fraction from Eucommia ulmoides. Carbohydr Polym 2017; 169:304-314. [DOI: 10.1016/j.carbpol.2017.04.034] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 03/28/2017] [Accepted: 04/14/2017] [Indexed: 12/18/2022]
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17
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Hong-Min F, Chun-Rong H, Rui Z, Li-Na S, Ya-Jun W, Li L. CGRP 8-37 enhances lipopolysaccharide-induced acute lung injury and regulating aquaporin 1 and 5 expressions in rats. J Physiol Biochem 2017; 73:381-386. [PMID: 28470555 DOI: 10.1007/s13105-017-0563-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 04/24/2017] [Indexed: 12/12/2022]
Abstract
Calcitonin gene-related peptide (CGRP) has been shown to play important roles in biological functions. However, there is very little evidence on the value of CGRP in lipopolysaccharide (LPS)-induced acute lung injury/acute respiratory distress syndrome (ALI/ARDS). Therefore, this study aimed to investigate the role of CGRP in LPS-induced ALI in rats. In the experiment, Sprague-Dawley (SD) rats were randomized into control, an antagonist of α-calcitonin gene-related peptide receptor (CGRP8-37), LPS groups, and CGRP8-37 + LPS groups. ALI model was prepared through retrograde injection of LPS (10 mg/kg). At 6 and 12 h, bronchoalveolar lavage was performed and used to assess total cell count and levels of tumor necrosis factor-α, interleukin-1β, -6, and -10 by enzyme-linked immunosorbent assay (ELISA). Lung tissue was collected for assessing wet-to-dry (W/D) ratio, hematoxylin and eosin staining. Aquaporin (AQP)-1 and -5 expressions in lung tissues were detected by quantitative PCR and Western blot. The results showed that histological injury, total cell count, and W/D ratio significantly reduced in LPS group after 6 h. The levels of inflammatory cytokines in CGRP8-37 + LPS-treated rats were higher than that in LPS-treated rats (all, P < 0.001). Real-time RT-PCR analysis showed that levels of AQP-1 in rats from CGRP8-37 + LPS group was lower than that in LPS-treated rats (P = 0.005 and P < 0.001). Western blotting analysis showed that AQP-1 protein levels at 6 h significantly decreased in CGRP8-37 + LPS rats. Together, our data suggest that CGRP antagonists, CGRP8-37 could enhance ALI induced by LPS in the rat model, and regulate the expression levels of AQP-1 and AQP-5 by affecting inflammatory cytokines. Thereby, regulating endogenous CGRP may be a potential treatment for ALI/ARDS.
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Affiliation(s)
- Fu Hong-Min
- Comprehensive Pediatric Internal Department, Children's Hospital, Kunming Medical University, Kunming, 6500032, People's Republic of China
| | - Huangfu Chun-Rong
- Department of Pediatrics, The first people's hospital of Yunnan province, Kunming, China
| | - Zheng Rui
- Department of Pediatrics, The first people's hospital of Yunnan province, Kunming, China
| | - Su Li-Na
- Department of Pediatrics, The first people's hospital of Yunnan province, Kunming, China
| | - Wang Ya-Jun
- Department of Pediatrics, The first people's hospital of Yunnan province, Kunming, China
| | - Li Li
- Department of Pediatrics, The first people's hospital of Yunnan province, Kunming, China.
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18
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Liu Z, Tang L, Zhu H, Xu T, Qiu C, Zheng S, Gu Y, Feng J, Zhang Y, Liang G. Design, Synthesis, and Structure–Activity Relationship Study of Novel Indole-2-carboxamide Derivatives as Anti-inflammatory Agents for the Treatment of Sepsis. J Med Chem 2016; 59:4637-50. [DOI: 10.1021/acs.jmedchem.5b02006] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zhiguo Liu
- Chemical
Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Longguang Tang
- Chemical
Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
- Center
for Molecular Imaging and Translational Medicine, State Key Laboratory
of Molecular Vaccinology and Molecular Diagnostics, School of Public
Health, Xiamen University, Xiamen 361102, China
| | - Heping Zhu
- Chemical
Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Tingting Xu
- The
Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Chenyu Qiu
- Chemical
Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Suqing Zheng
- Chemical
Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Yugui Gu
- Chemical
Biology Section in WMU−WU Joint Research Centre, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Jianpeng Feng
- Chemical
Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Yali Zhang
- Chemical
Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Guang Liang
- Chemical
Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
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19
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Jacob SP, Lakshmikanth CL, Chaithra VH, Kumari TRS, Chen CH, McIntyre TM, Marathe GK. Lipopolysaccharide Cross-Tolerance Delays Platelet-Activating Factor-Induced Sudden Death in Swiss Albino Mice: Involvement of Cyclooxygenase in Cross-Tolerance. PLoS One 2016; 11:e0153282. [PMID: 27064683 PMCID: PMC4827832 DOI: 10.1371/journal.pone.0153282] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 03/04/2016] [Indexed: 12/22/2022] Open
Abstract
Lipopolysaccharide (LPS) signaling through Toll-like receptor-4 (TLR-4) has been implicated in the pathogenesis of many infectious diseases. Some believe that TLR-mediated pathogenicity is due, in part, to the lipid pro-inflammatory mediator platelet-activating factor (PAF), but this has been questioned. To test the direct contribution of PAF in endotoxemia in murine models, we injected PAF intraperitoneally into Swiss albino mice in the presence and absence of LPS. PAF alone (5 μg/mouse) caused death within 15-20 min, but this could be prevented by pretreating mice with PAF-receptor (PAF-R) antagonists or PAF-acetylhydrolase (PAF-AH). A low dose of LPS (5 mg/kg body wt) did not impair PAF-induced death, whereas higher doses (10 or 20 mg/kg body wt) delayed death, probably via LPS cross-tolerance. Cross-tolerance occurred only when PAF was injected simultaneously with LPS or within 30 min of LPS injection. Tolerance does not appear to be due to an abundant soluble mediator. Histologic examination of lungs and liver and measurement of circulating TNF-α and IL-10 levels suggested that the inflammatory response is not diminished during cross-tolerance. Interestingly, aspirin, a non-specific cyclooxygenase (COX) inhibitor, partially blocked PAF-induced sudden death, whereas NS-398, a specific COX-2 inhibitor, completely protected mice from the lethal effects of PAF. Both COX inhibitors (at 20 mg/kg body wt) independently amplified the cross-tolerance exerted by higher dose of LPS, suggesting that COX-derived eicosanoids may be involved in these events. Thus, PAF does not seem to have a protective role in endotoxemia, but its effects are delayed by LPS in a COX-sensitive way. These findings are likely to shed light on basic aspects of the endotoxin cross-tolerance occurring in many disease conditions and may offer new opportunities for clinical intervention.
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Affiliation(s)
- Shancy Petsel Jacob
- Department of Studies in Biochemistry, University of Mysore, Manasagangothri, Mysuru, 570006, Karnataka, India
| | | | | | | | - Chu-Huang Chen
- Vascular and Medicinal Research, Texas Heart Institute, Houston, Texas, 77225–0345, United States of America
| | - Thomas M. McIntyre
- Department of Cellular and Molecular Medicine (NC10), Cleveland Clinic Lerner Research Institute, 9500 Euclid Avenue, Cleveland, Ohio, 44195, United States of America
| | - Gopal Kedihitlu Marathe
- Department of Studies in Biochemistry, University of Mysore, Manasagangothri, Mysuru, 570006, Karnataka, India
- * E-mail:
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20
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Development of a murine model of early sepsis in diet-induced obesity. BIOMED RESEARCH INTERNATIONAL 2014; 2014:719853. [PMID: 24967393 PMCID: PMC4054609 DOI: 10.1155/2014/719853] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 02/25/2014] [Indexed: 12/15/2022]
Abstract
Sepsis, a global health issue, is the most common cause of mortality in the intensive care unit. The aim of this study was to develop a new model of sepsis that investigates the impact of prolonged western diet (WD) induced obesity on the response to early sepsis. Male C57BL/6 mice were fed either a high fat WD or normal chow diet (NCD) for 6, 15, or 27 weeks. Septic obese mice at 15 and 27 weeks had significantly lower levels of lung myeloperoxidase (26.3 ± 3.80 U/mg tissue) compared to age matched ad lib (44.1 ± 2.86 U/mg tissue) and diet restricted (63.2 ± 5.60 U/mg tissue) controls. Low levels of lung inflammation were not associated with changes in hepatic cytokines and oxidative stress levels. Obese mice had significantly (P < 0.0001) larger livers compared to controls. Histological examination of the livers demonstrated that WD fed mice had increased inflammation with pronounced fat infiltration, steatosis, and hepatocyte ballooning. Using this model of prolonged exposure to high fat diet we have data that agree with recent clinical observations suggesting obese individuals are protected from sepsis-induced lung injury. This model will allow us to investigate the links between damage to the hepatic microcirculation, immune response, and lung injury.
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21
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Nastase MV, Iozzo RV, Schaefer L. Key roles for the small leucine-rich proteoglycans in renal and pulmonary pathophysiology. Biochim Biophys Acta Gen Subj 2014; 1840:2460-70. [PMID: 24508120 DOI: 10.1016/j.bbagen.2014.01.035] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Accepted: 01/28/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND Small leucine-rich proteoglycans (SLRPs) are molecules that have signaling roles in a multitude of biological processes. In this respect, SLRPs play key roles in the evolution of a variety of diseases throughout the human body. SCOPE OF REVIEW We will critically review current developments in the roles of SLRPs in several types of disease of the kidney and lungs. Particular emphasis will be given to the roles of decorin and biglycan, the best characterized members of the SLRP gene family. MAJOR CONCLUSIONS In both renal and pulmonary disorders, SLRPs are essential elements that regulate several pathophysiological processes including fibrosis, inflammation and tumor progression. Decorin has remarkable antifibrotic and antitumorigenic properties and is considered a valuable potential treatment of these diseases. Biglycan can modulate inflammatory processes in lung and renal inflammation and is a potential target in the treatment of inflammatory conditions. GENERAL SIGNIFICANCE SLRPs can serve as either treatment targets or as potential treatment in renal or lung disease. This article is part of a Special Issue entitled Matrix-mediated cell behaviour and properties.
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Affiliation(s)
- Madalina V Nastase
- Pharmazentrum Frankfurt/ZAFES, Institut für Allgemeine Pharmakologie und Toxikologie, Klinikum der Goethe-Universität Frankfurt am Main, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany.
| | - Renato V Iozzo
- Department of Pathology, Anatomy and Cell Biology, and the Cancer Cell Biology and Signaling Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA.
| | - Liliana Schaefer
- Pharmazentrum Frankfurt/ZAFES, Institut für Allgemeine Pharmakologie und Toxikologie, Klinikum der Goethe-Universität Frankfurt am Main, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany.
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22
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Tai TC. Involvement of the Rho kinases in mediating sepsis. J Thorac Dis 2012; 4:15-6. [PMID: 22295161 PMCID: PMC3256547 DOI: 10.3978/j.issn.2072-1439.2011.09.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Accepted: 09/21/2011] [Indexed: 01/22/2023]
Affiliation(s)
- T C Tai
- Medical Sciences Division, Northern Ontario School of Medicine, Laurentian University, Canada
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