1
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Yang K, Gao L, Hao H, Yu L. Identification of a novel gene signature for the prognosis of sepsis. Comput Biol Med 2023; 159:106958. [PMID: 37087781 DOI: 10.1016/j.compbiomed.2023.106958] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 04/03/2023] [Accepted: 04/16/2023] [Indexed: 04/25/2023]
Abstract
Sepsis is a life-threatening organ dysfunction caused by the host's dysfunctional response to infection, and its pathogenesis is still unclear. In view of the complex pathological process of sepsis, finding suitable biomarkers is helpful for the research and treatment of sepsis. This study determined the potential prognostic markers of sepsis by analyzing the molecular characteristics of patients with sepsis. During this study, bioinformatics analysis was conducted on the RNA sequencing data and DNA methylation sites from the public database to determine the prognostic genes related to sepsis, and a 9-gene prognostic signature for sepsis was constructed. According to the risk score, all sepsis samples were divided into two groups. Then, the prediction effect of the 9-gene signature was verified in two cohorts, and the association between these genes and sepsis was further revealed through immune infiltration analysis, gene set enrichment analysis and the relationship between clinical phenotype and survival rate. Our study provided a reliable prognostic signature for sepsis. The signature could predict the survival of patients with sepsis and serve as a predictor.
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Affiliation(s)
- Kai Yang
- School of Computer Science and Technology, Xidian University, Xi'an, 710071, Shaanxi, China
| | - Lin Gao
- School of Computer Science and Technology, Xidian University, Xi'an, 710071, Shaanxi, China
| | - HongXia Hao
- School of Computer Science and Technology, Xidian University, Xi'an, 710071, Shaanxi, China.
| | - Liang Yu
- School of Computer Science and Technology, Xidian University, Xi'an, 710071, Shaanxi, China.
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2
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Brennan KA, Bhutiani M, Kingeter MA, McEvoy MD. Updates in the Management of Perioperative Vasoplegic Syndrome. Adv Anesth 2022; 40:71-92. [PMID: 36333053 DOI: 10.1016/j.aan.2022.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Vasoplegic syndrome occurs relatively frequently in cardiac surgery, liver transplant, major noncardiac surgery, in post-return of spontaneous circulation situations, and in pateints with sepsis. It is paramount for the anesthesiologist to understand both the pathophysiology of vasoplegia and the different treatment strategies available for rescuing a patient from life-threatening hypotension.
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Affiliation(s)
- Kaitlyn A Brennan
- Department of Anesthesiology, Vanderbilt University Medical Center, 1211 21st Avenue South, MAB 422, Nashville, TN 37212, USA
| | - Monica Bhutiani
- Department of Anesthesiology, Vanderbilt University Medical Center, 1211 21st Avenue South, VUH 4107, Nashville, TN 37212, USA
| | - Meredith A Kingeter
- Anesthesia Residency, Vanderbilt University Medical Center, 1215 21st Avenue South, Suite 5160 MCE NT, Nashville, TN 37212, USA
| | - Matthew D McEvoy
- VUMC Enhanced Recovery Programs, Department of Anesthesiology, Vanderbilt University Medical Center, 1301 Medical Center Drive, TVC 4648, Nashville, TN 37232, USA.
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3
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Brognara F, Castania JA, Ribeiro AB, Santos-Júnior NN, Salgado HC. The Bezold-Jarisch Reflex and The Inflammatory Response Modulation in Unanesthetized Endotoxemic Rats. Front Physiol 2021; 12:745285. [PMID: 34616312 PMCID: PMC8488195 DOI: 10.3389/fphys.2021.745285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 08/23/2021] [Indexed: 11/16/2022] Open
Abstract
Evidence indicates that the activation of the parasympathetic branch of the autonomic nervous system may be effective in treating inflammatory diseases. Previously, we have described that baroreflex activation displays anti-inflammatory properties. Analogous to the baroreflex, the Bezold-Jarisch reflex also promotes parasympathetic activation with simultaneous inhibition of the sympathetic system. Thus, the present study aimed to evaluate whether the activation of the Bezold-Jarisch reflex would also have the ability to reduce inflammation in unanesthetized rats. We used lipopolysaccharide (LPS) injection (5mg/kg, i.p.) to induce systemic inflammation in male Wistar Hannover rats and phenylbiguanide (PBG) administration (5μg/kg, i.v.) to activate the Bezold-Jarisch reflex. Spleen, heart, hypothalamus, and blood samples were collected to determine the levels of cytokines. Compared to baseline, PBG reduced the arterial pressure (115±2 vs. 88±5mmHg) and heart rate (380±7 vs. 114±26bpm), immediately after its administration, confirming the activation of the parasympathetic system and inhibition of the sympathetic system. From the immunological point of view, the activation of the Bezold-Jarisch reflex decreased the plasma levels of TNF (LPS: 775±209 vs. PBG + LPS: 248±30pg/ml) and IL-6 levels in the spleen (LPS: 39±6 vs. PBG + LPS: 24±4pg/mg of tissue). However, it did not change the other cytokines in the plasma or the other tissues evaluated. These findings confirm that the activation of the Bezold-Jarisch reflex can modulate inflammation and support the understanding that the cardiovascular reflexes regulate the immune system.
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Affiliation(s)
- Fernanda Brognara
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Jaci Airton Castania
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Aline Barbosa Ribeiro
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Helio Cesar Salgado
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
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4
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Song Y, Kim Y, Ha S, Sheller-Miller S, Yoo J, Choi C, Park CH. The emerging role of exosomes as novel therapeutics: Biology, technologies, clinical applications, and the next. Am J Reprod Immunol 2020; 85:e13329. [PMID: 32846024 PMCID: PMC7900947 DOI: 10.1111/aji.13329] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/14/2020] [Accepted: 08/18/2020] [Indexed: 12/21/2022] Open
Abstract
The extracellular vesicles (EVs) research area has grown rapidly because of their pivotal roles in intercellular communications and maintaining homeostasis of individual organism. As a subtype of EVs, exosomes are made via unique biogenesis pathway and exhibit disparate functional and phenotypic characteristics. Functionally, exosomes transfer biological messages from donor cell to recipient cell, which makes exosomes as a novel therapeutic platform delivering therapeutic materials to the target tissue/cell. Currently, both academia and industry try to develop exosome platform‐based therapeutics for disease management, some of which are already in clinical trials. In this review, we will discuss focusing on therapeutic values of exosomes, recent advances in therapeutic exosome platform development, and late development of exosome therapeutics in diverse therapeutic areas.
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Affiliation(s)
| | | | - Sunhyung Ha
- ILIAS Biologics Inc, Daejeon, Republic of Korea
| | - Samantha Sheller-Miller
- Division of Maternal-Fetal Medicine & Perinatal Research, Department of Obstetrics & Gynecology, The University of Texas Medical Branch, Galveston, TX, USA
| | | | - Chulhee Choi
- ILIAS Biologics Inc, Daejeon, Republic of Korea.,Department of Bio and Brain Engineering, KAIST, Daejeon, Republic of Korea
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5
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Cao L, Zhu T, Lang X, Jia S, Yang Y, Zhu C, Wang Y, Feng S, Wang C, Zhang P, Chen J, Jiang H. Inhibiting DNA Methylation Improves Survival in Severe Sepsis by Regulating NF-κB Pathway. Front Immunol 2020; 11:1360. [PMID: 32714333 PMCID: PMC7343767 DOI: 10.3389/fimmu.2020.01360] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 05/28/2020] [Indexed: 12/17/2022] Open
Abstract
Organ dysfunction caused by sepsis is life-threatening and results in high mortality. Therapeutic options for sepsis are limited. Pathogenic factors are considered as components of environmental pressure that modify DNA methylation patterns thereby enhancing disease progression. Here, we found that sepsis patients exhibited higher levels of genomic DNA methylation patterns and hypermethylated genes associated with the NF-kB signaling pathway. Therefore, we hypothesized that a DNA methyl transferase inhibitor, Decitabine, may mitigate inflammation and improve survival by inhibiting the NF-κB signaling pathway. To test the hypothesis, mice challenged with caecal ligation and puncture (CLP) were subcutaneously injected with Decitabine solution (0.5, 1, and 1.5 mg/kg) 2 h following operation. Our results indicated that Decitabine reduces DNA methyltransferases (DNMTs), attenuates NF-κB activation, downregulates inflammatory cytokine levels, and inhibits the progression of sepsis. Thus, DNA methylation may be indispensable for sepsis and serve as a predicting factor. The use of Decitabine could represent a novel strategy in the treatment of sepsis.
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Affiliation(s)
- Luxi Cao
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
| | - Tingting Zhu
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
| | - Xiabing Lang
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
| | - Sha Jia
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
| | - Yi Yang
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
| | - Chaohong Zhu
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
| | - Yucheng Wang
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
| | - Shi Feng
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
| | - Cuili Wang
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
| | - Ping Zhang
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
| | - Jianghua Chen
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
| | - Hong Jiang
- Kidney Disease Center, College of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou, China.,Key Laboratory of Nephropathy, Hangzhou, China.,Kidney Disease Immunology Laboratory, The Third-Grade Laboratory, State Administration of Traditional Chinese Medicine of China, Beijing, China.,Key Laboratory of Multiple Organ Transplantation, Ministry of Health of China, Hangzhou, China.,Institute of Nephropathy, Zhejiang University, Hangzhou, China
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6
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Zhang H, Wang Y, Li S, Tang X, Liang R, Yang X. SOCS3 protects against neonatal necrotizing enterocolitis via suppressing NLRP3 and AIM2 inflammasome activation and p65 nuclear translocation. Mol Immunol 2020; 122:21-27. [PMID: 32278838 DOI: 10.1016/j.molimm.2020.03.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 03/11/2020] [Accepted: 03/27/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Necrotizing enterocolitis (NEC) is an acquired disorder of mucosal damage characterized by the diffuse or local necrosis of the intestine. The suppressor of cytokine signaling 3 (SOCS3) has been demonstrated to possess anti-inflammatory action in gastritis, ulcerative colitis and other inflammatory diseases. The present study aims to explore the effects of SOCS3 on LPS-induced colonic cell model of NEC, and investigate the underlying mechanisms. METHODS Expression of SOCS3 in tissue samples of NEC and LPS-induced enterocytes were evaluated by real-time quantitative PCR (RT-qPCR). Western blotting and enzyme-linked immunosorbent assay (ELISA) were applied to examine the effect of SOCS3 on inflammatory molecules. Co-immunoprecipitation assay were devoted to explore the relation between SOCS3 and TLR4. RESULTS We proved that SOCS3 was expressed at a low level in tissue samples of NEC and LPS-induced enterocytes, and LPS inhibited SOCS3 expression via JAK2/STAT3 pathway. Overexpression of SOCS3 weaken the LPS-induced inflammatory response in FHC and CACO2 cells. Moreover, SOCS3 downregulates proinflammatory cytokines by targeting TLR4, thus mediating the p65 nuclear translocation, and the activation of NLR family pyrin domain containing 3/absent in melanoma-2 (NLRP3/AIM2) inflammasome, ultimately reveals its anti-inflammatory effects. CONCLUSIONS Taken together, our data revealed that LPS inhibited SOCS3 expression via JAK2/STAT3 pathway, and SOCS3 protects enterocytes against NEC through mediating p65 nuclear translocation and NLRP3/AIM2 inflammasome activation in a TLR4 dependent manner.
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Affiliation(s)
- Hua Zhang
- Pediatric intensive care unit, The Affiliated Children's Hospital of Xi'an Jiaotong University, 69 Xijuyuan Lane, Xi'an, Shaanxi, 710003, China
| | - Yi Wang
- Neonatal Intensive Care Unit, The Affiliated Children's Hospital of Xi'an Jiaotong University, 69 Xijuyuan Lane, Xi'an, Shaanxi, 710003, China
| | - Sixiu Li
- Neonatal Intensive Care Unit, The Affiliated Children's Hospital of Xi'an Jiaotong University, 69 Xijuyuan Lane, Xi'an, Shaanxi, 710003, China
| | - Xiaojing Tang
- Neonatal Intensive Care Unit, The Affiliated Children's Hospital of Xi'an Jiaotong University, 69 Xijuyuan Lane, Xi'an, Shaanxi, 710003, China
| | - Ruobing Liang
- Neonatal Intensive Care Unit, The Affiliated Children's Hospital of Xi'an Jiaotong University, 69 Xijuyuan Lane, Xi'an, Shaanxi, 710003, China
| | - Xuefeng Yang
- Neonatal Intensive Care Unit, The Affiliated Children's Hospital of Xi'an Jiaotong University, 69 Xijuyuan Lane, Xi'an, Shaanxi, 710003, China.
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7
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Choi H, Kim Y, Mirzaaghasi A, Heo J, Kim YN, Shin JH, Kim S, Kim NH, Cho ES, In Yook J, Yoo TH, Song E, Kim P, Shin EC, Chung K, Choi K, Choi C. Exosome-based delivery of super-repressor IκBα relieves sepsis-associated organ damage and mortality. SCIENCE ADVANCES 2020; 6:eaaz6980. [PMID: 32285005 PMCID: PMC7141819 DOI: 10.1126/sciadv.aaz6980] [Citation(s) in RCA: 126] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 01/13/2020] [Indexed: 05/18/2023]
Abstract
As extracellular vesicles that play an active role in intercellular communication by transferring cellular materials to recipient cells, exosomes offer great potential as a natural therapeutic drug delivery vehicle. The inflammatory responses in various disease models can be attenuated through introduction of super-repressor IκB (srIκB), which is the dominant active form of IκBα and can inhibit translocation of nuclear factor κB into the nucleus. An optogenetically engineered exosome system (EXPLOR) that we previously developed was implemented for loading a large amount of srIκB into exosomes. We showed that intraperitoneal injection of purified srIκB-loaded exosomes (Exo-srIκBs) attenuates mortality and systemic inflammation in septic mouse models. In a biodistribution study, Exo-srIκBs were observed mainly in the neutrophils, and in monocytes to a lesser extent, in the spleens and livers of mice. Moreover, we found that Exo-srIκB alleviates inflammatory responses in monocytic THP-1 cells and human umbilical vein endothelial cells.
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Affiliation(s)
- Hojun Choi
- Department of Bio and Brain Engineering, KAIST, Daejeon 34141, Republic of Korea
- Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Youngeun Kim
- ILIAS Biologics Inc., Daejeon 34014, Republic of Korea
| | - Amin Mirzaaghasi
- Department of Bio and Brain Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Jaenyoung Heo
- ILIAS Biologics Inc., Daejeon 34014, Republic of Korea
| | - Yu Na Kim
- ILIAS Biologics Inc., Daejeon 34014, Republic of Korea
| | - Ju Hye Shin
- Division of Pulmonology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Seonghun Kim
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Nam Hee Kim
- Department of Oral Pathology, Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
| | - Eunae Sandra Cho
- Department of Oral Pathology, Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
| | - Jong In Yook
- Department of Oral Pathology, Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
| | - Tae-Hyun Yoo
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Eunjoo Song
- IVIM Technology, Daejeon 34051, Republic of Korea
| | - Pilhan Kim
- Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- IVIM Technology, Daejeon 34051, Republic of Korea
- Graduate School of Nanoscience and Technology, KAIST, Daejeon 34141, Republic of Korea
| | - Eui-Cheol Shin
- Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- Corresponding author. (K.Cho.); (E.-C.S.); (K.Chu.)
| | - Kyungsoo Chung
- Division of Pulmonology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
- Corresponding author. (K.Cho.); (E.-C.S.); (K.Chu.)
| | - Kyungsun Choi
- ILIAS Biologics Inc., Daejeon 34014, Republic of Korea
- Corresponding author. (K.Cho.); (E.-C.S.); (K.Chu.)
| | - Chulhee Choi
- Department of Bio and Brain Engineering, KAIST, Daejeon 34141, Republic of Korea
- Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- ILIAS Biologics Inc., Daejeon 34014, Republic of Korea
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8
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Brognara F, Castania JA, Dias DPM, Kanashiro A, Salgado HC. Time Course of Hemodynamic Responses to Different Doses of Lipopolysaccharide in Unanesthetized Male Rats. Front Physiol 2019; 10:771. [PMID: 31293442 PMCID: PMC6603340 DOI: 10.3389/fphys.2019.00771] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 06/03/2019] [Indexed: 12/21/2022] Open
Abstract
Lipopolysaccharide (LPS) administration is a well-known method to induce systemic inflammation widely used for investigating new therapeutic strategies for sepsis treatment, which is characterized by clinical manifestations such as tachycardia and hypotension. However, there are different doses of LPS used in several studies, and the hemodynamic responses were not always well characterized. Thus, the present study aimed to evaluate the arterial pressure, heart rate, heart rate variability, and baroreflex function from rats, over time, to different doses of LPS. Femoral artery and vein catheters were inserted into anesthetized Wistar-Hannover male rats for arterial pressure recording and LPS administration, respectively. On the next day, the arterial pressure was recorded before and after (90, 180, and 360 min) LPS injection (0.06, 20, 30, and 40 mg/kg). All doses of LPS tested increased the heart rate and decreased baroreflex sensitivity over time. In addition, while LPS administration of 20, 30, and 40 mg/kg increased the mean arterial pressure over time, 0.06 mg/kg decreased the mean arterial pressure at 360 min, as compared to baseline values. Furthermore, high doses of LPS decreased the power of the HF band of the cardiac interval spectrum over time, and the higher dose increased the power of the LF band. Our data indicate that high doses of LPS promote hypertensive response over time, while a low dose decreases arterial pressure. Moreover, the changes in heart rate variability and baroreflex function elicited by LPS may be not associated with arterial pressure response produced by the endotoxemia.
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Affiliation(s)
- Fernanda Brognara
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Jaci Airton Castania
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Alexandre Kanashiro
- Department of Neurosciences and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Helio Cesar Salgado
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
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9
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Ethanol Extract of Illicium henryi Attenuates LPS-Induced Acute Kidney Injury in Mice via Regulating Inflammation and Oxidative Stress. Nutrients 2019; 11:nu11061412. [PMID: 31234591 PMCID: PMC6627762 DOI: 10.3390/nu11061412] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 06/04/2019] [Accepted: 06/19/2019] [Indexed: 12/13/2022] Open
Abstract
The root bark of Illicium henryi has been used in traditional Chinese medicine to treat various diseases. Its ethanol extract (EEIH) was found to contain a large number of phenols and possess in vitro antioxidant activities. The present study aimed to investigate its protective effect against lipopolysaccharide (LPS)-induced acute kidney injury (AKI) in mice. BALB/c mice were intraperitoneally pretreated with EEIH for five days, and then LPS injection was applied to induce AKI. Blood samples and kidney tissues were collected and used for histopathology, biochemical assay, enzyme-linked immunosorbent assay (ELISA), quantitative real-time polymerase chain reaction (qRT-PCR), and Western blot analyses. EEIH not only significantly dose-dependently attenuated histological damage and reduced renal myeloperoxidase (MPO) activity (from 9.77 ± 0.73 to 0.84 ± 0.30 U/g tissue) but also decreased serum creatinine (from 55.60 ± 2.70 to 27.20 ± 2.39 µmol/L) and blood urea nitrogen (BUN) (from 29.95 ± 1.96 to 16.12 ± 1.24 mmol/L) levels in LPS-treated mice. EEIH also markedly dose-dependently inhibited mRNA expression and production of TNF-α (from 140.40 ± 5.15 to 84.74 ± 5.65 pg/mg), IL-1β (from 135.54 ± 8.20 to 77.15 ± 5.34 pg/mg), IL-6 (from 168.74 ± 7.23 to 119.16 ± 9.35 pg/mg), and COX-2 in renal tissue of LPS-treated mice via downregulating mRNA and protein expressions of toll-like receptor 4 (TLR4) and phosphorylation of nuclear factor-κB (NF-κB) p65. Moreover, EEIH significantly dose-dependently reduced malondialdehyde (MDA) (from 5.43 ± 0.43 to 2.80 ± 0.25 nmol/mg prot) and NO (from 1.01 ± 0.05 to 0.24 ± 0.05 µmol/g prot) levels and increased superoxide dismutase (SOD) (from 22.32 ± 2.92 to 47.59 ± 3.79 U/mg prot) and glutathione (GSH) (from 6.57 ± 0.53 to 16.89 ± 0.68 µmol/g prot) levels in renal tissue induced by LPS through upregulating mRNA expression of nuclear factor erythroid 2 related factor 2 (Nrf2). Furthermore, EEIH inhibited LPS-induced intracellular reactive oxygen species (ROS) production from RAW264.7 cells in a concentration-dependent manner. These results suggest that EEIH has protective effects against AKI in mice through regulating inflammation and oxidative stress.
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10
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Burgdorff AM, Bucher M, Schumann J. Vasoplegia in patients with sepsis and septic shock: pathways and mechanisms. J Int Med Res 2018; 46:1303-1310. [PMID: 29332515 PMCID: PMC6091823 DOI: 10.1177/0300060517743836] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Sepsis is one of the most frequent causes of death among patients in intensive care units. Many therapeutic strategies have been assessed without the desired success rates. A key risk factor for death is hypotension due to vasodilatation with vascular hyposensitivity. However, the pathways underlying this process remain unclear. Endotoxemia induces inflammatory mediators, and this is followed by vasoplegia and decreased cardiac contractility. Although inhibition of these mediators diminishes mortality rates in animal models, this phenomenon has not been confirmed in humans. Downregulation of vasoconstrictive receptors such as angiotensin receptors, adrenergic and vasopressin receptors is seen in sepsis, which is associated with a hyporesponsiveness to vasoconstrictive mediators. Animal studies have verified that receptor downregulation is linked to the above-mentioned inflammatory mediators. Anti-inflammatory therapy with glucocorticoids reportedly improves responsiveness to catecholamines with higher survival in rats, although this has not been shown to be clinically significant in humans. Hence, there is an urgent need for in-depth studies investigating the underlying mechanisms of vasoplegia to allow for development of effective therapeutic strategies for the treatment of sepsis.
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Affiliation(s)
- A-M Burgdorff
- Department of Anesthesiology and Surgical Intensive Care, University Hospital Halle (Saale), Halle (Saale), Germany
| | - M Bucher
- Department of Anesthesiology and Surgical Intensive Care, University Hospital Halle (Saale), Halle (Saale), Germany
| | - J Schumann
- Department of Anesthesiology and Surgical Intensive Care, University Hospital Halle (Saale), Halle (Saale), Germany
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Vanoni S, Tsai YT, Waddell A, Waggoner L, Klarquist J, Divanovic S, Hoebe K, Steinbrecher KA, Hogan SP. Myeloid-derived NF-κB negative regulation of PU.1 and c/EBP-β-driven pro-inflammatory cytokine production restrains LPS-induced shock. Innate Immun 2017; 23:175-187. [PMID: 27932520 PMCID: PMC5563821 DOI: 10.1177/1753425916681444] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Sepsis is a life-threatening event predominantly caused by Gram-negative bacteria. Bacterial infection causes a pronounced macrophage (MΦ) and dendritic cell activation that leads to excessive pro-inflammatory cytokine IL-1β, IL-6 and TNF-α production (cytokine storm), resulting in endotoxic shock. Previous experimental studies have revealed that inhibiting NF-κB signaling ameliorates disease symptoms; however, the contribution of myeloid p65 in endotoxic shock remains elusive. In this study, we demonstrate increased mortality in mice lacking p65 in the myeloid lineage (p65Δmye) compared with wild type mice upon ultra-pure LPS challenge. We show that increased susceptibility to LPS-induced shock was associated with elevated serum level of IL-1β and IL-6. Mechanistic analyses revealed that LPS-induced pro-inflammatory cytokine production was ameliorated in p65-deficient bone marrow-derived MΦs; however, p65-deficient 'activated' peritoneal MΦs exhibited elevated IL-1β and IL-6. We show that the elevated pro-inflammatory cytokine secretion was due, in part, to increased accumulation of IL-1β mRNA and protein in activated inflammatory MΦs. The increased IL-1β was linked with heightened binding of PU.1 and CCAAT/enhancer binding protein-β to Il1b and Il6 promoters in activated inflammatory MΦs. Our data provide insight into a role for NF-κB in the negative regulation of pro-inflammatory cytokines in myeloid cells.
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Affiliation(s)
- Simone Vanoni
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH, 45229
| | - Yi Ting Tsai
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH, 45229
| | - Amanda Waddell
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH, 45229
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH, 45229
| | - Lisa Waggoner
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH, 45229
| | - Jared Klarquist
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH, 45229
| | - Senad Divanovic
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH, 45229
| | - Kasper Hoebe
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH, 45229
| | - Kris A. Steinbrecher
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH, 45229
| | - Simon P. Hogan
- Division of Allergy and Immunology, Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH, 45229
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The protective role of MLCP-mediated ERM dephosphorylation in endotoxin-induced lung injury in vitro and in vivo. Sci Rep 2016; 6:39018. [PMID: 27976727 PMCID: PMC5157034 DOI: 10.1038/srep39018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 11/17/2016] [Indexed: 12/13/2022] Open
Abstract
The goal of this study was to investigate the role of MLC phosphatase (MLCP) in a LPS model of acute lung injury (ALI). We demonstrate that ectopic expression of a constitutively-active (C/A) MLCP regulatory subunit (MYPT1) attenuates the ability of LPS to increase endothelial (EC) permeability. Down-regulation of MYPT1 exacerbates LPS-induced expression of ICAM1 suggesting an anti-inflammatory role of MLCP. To determine whether MLCP contributes to LPS-induced ALI in vivo, we utilized a nanoparticle DNA delivery method to specifically target lung EC. Expression of a C/A MYPT1 reduced LPS-induced lung inflammation and vascular permeability. Further, increased expression of the CS1β (MLCP catalytic subunit) also reduced LPS-induced lung inflammation, whereas the inactive CS1β mutant increased vascular leak. We next examined the role of the cytoskeletal targets of MLCP, the ERM proteins (Ezrin/Radixin/Moesin), in mediating barrier dysfunction. LPS-induced increase in EC permeability was accompanied by PKC-mediated increase in ERM phosphorylation, which was more prominent in CS1β-depleted cells. Depletion of Moesin and Ezrin, but not Radixin attenuated LPS-induced increases in permeability. Further, delivery of a Moesin phospho-null mutant into murine lung endothelium attenuated LPS-induced lung inflammation and vascular leak suggesting that MLCP opposes LPS-induced ALI by mediating the dephosphorylation of Moesin and Ezrin.
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Betulin attenuates kidney injury in septic rats through inhibiting TLR4/NF-κB signaling pathway. Life Sci 2016; 144:185-93. [DOI: 10.1016/j.lfs.2015.12.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 09/30/2015] [Accepted: 12/01/2015] [Indexed: 01/20/2023]
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McKenna S, Wright CJ. Inhibiting IκBβ-NFκB signaling attenuates the expression of select pro-inflammatory genes. J Cell Sci 2015; 128:2143-55. [PMID: 25908863 DOI: 10.1242/jcs.168351] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 04/13/2015] [Indexed: 12/26/2022] Open
Abstract
Multiple mediators of septic shock are regulated by the transcription factor nuclear factor κB (NFκB). However, complete NFκB inhibition can exacerbate disease, necessitating evaluation of targeted strategies to attenuate the pro-inflammatory response. Here, we demonstrate that in murine macrophages, low-dose NFκB inhibitors specifically attenuates lipopolysaccharide (LPS)-induced IκBβ degradation and the expression of a select subset of target genes (encoding IL1β, IL6, IL12β). Gain- and loss-of-function experiments demonstrate the necessary and sufficient role of inhibitor of NFκB family member IκBβ (also known as NFKBIB) in the expression of these genes. Furthermore, both fibroblasts and macrophages isolated from IκBβ overexpressing mice demonstrate attenuated LPS-induced IκBβ-NFκB signaling and IL1β, IL6 and IL12β expression. Further confirming the role of IκBβ and its NFκB subunit binding partner cRel in LPS-induced gene expression, pre-treatment of wild-type mouse embryonic fibroblasts with a cell-permeable peptide containing the cRel nuclear localization sequence attenuated IL6 expression. We prove that LPS-induced IκBβ-NFκB signaling can be selectively modulated to attenuate the expression of select pro-inflammatory target genes, thus providing therapeutic insights for patients exposed to systemic inflammatory stress.
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Affiliation(s)
- Sarah McKenna
- Section of Neonatology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Clyde J Wright
- Section of Neonatology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045, USA
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Blockade of the JNK signalling as a rational therapeutic approach to modulate the early and late steps of the inflammatory cascade in polymicrobial sepsis. Mediators Inflamm 2015; 2015:591572. [PMID: 25873765 PMCID: PMC4385695 DOI: 10.1155/2015/591572] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 09/26/2014] [Indexed: 01/12/2023] Open
Abstract
Cecal ligation and puncture (CLP) is an experimental polymicrobial sepsis induced systemic inflammation that leads to acute organ failure. Aim of our study was to evaluate the effects of SP600125, a specific c-Jun NH2-terminal kinase (JNK) inhibitor, to modulate the early and late steps of the inflammatory cascade in a murine model of CLP-induced sepsis. CB57BL/6J mice were subjected to CLP or sham operation. Animals were randomized to receive either SP600125 (15 mg/kg) or its vehicle intraperitoneally 1 hour after surgery and repeat treatment every 24 hours. To evaluate survival, a group of animals was monitored every 24 hours for 120 hours. Two other animals were sacrificed 4 or 18 hours after surgical procedures; lung and liver samples were collected for biomolecular and histopathologic analysis. The expression of p-JNK, p-ERK, TNF-α, HMGB-1, NF-κB, Ras, Rho, Caspase 3, Bcl-2, and Bax was evaluated in lung and liver samples; SP600125 improved survival, reduced CLP induced activation of JNK, NF-κB, TNF-α, and HMGB-1, inhibited proapoptotic pathway, preserved Bcl-2 expression, and reduced histologic damage in both lung and liver of septic mice. SP600125 protects against CLP induced sepsis by blocking JNK signalling; therefore, it can be considered a therapeutic approach in human sepsis.
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Bitto A, Minutoli L, David A, Irrera N, Rinaldi M, Venuti FS, Squadrito F, Altavilla D. Flavocoxid, a dual inhibitor of COX-2 and 5-LOX of natural origin, attenuates the inflammatory response and protects mice from sepsis. Crit Care 2012; 16:R32. [PMID: 22356547 PMCID: PMC3396211 DOI: 10.1186/1364-8535-16-r32] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 01/25/2012] [Accepted: 02/22/2012] [Indexed: 04/15/2023] Open
Abstract
INTRODUCTION Cecal ligation and puncture (CLP) is an inflammatory condition that leads to multisystemic organ failure. Flavocoxid, a dual inhibitor of cyclooxygenase (COX-2) and 5-lipoxygenase (5-LOX), has been shown in vitro to possess antiinflammatory activity in lipopolysaccharide (LPS)-stimulated rat macrophages by reducing nuclear factor (NF)-κB activity and COX-2, 5-LOX and inducible nitric oxide synthase (iNOS) expression. The aim of this study was to evaluate the effects of flavocoxid in a murine model of CLP-induced polymicrobial sepsis. METHODS C57BL/6J mice were subjected to CLP or sham operation. In a first set of experiments, an intraperitoneal injection of flavocoxid (20 mg/kg) or vehicle was administered 1 hour after surgery and repeated every 12 hours. Survival rate was monitored every 24 hours throughout 120 hours. Furthermore, additional groups of sham and CLP mice were killed 18 hours after surgical procedures for blood-sample collection and the lung and liver were collected for biomolecular, biochemical and histopathologic studies. RESULTS COX-2, 5-LOX, tumor necrosis factor-α (TNF-α), interleukin (IL)-6, IL-10, extracellular-regulated-kinase 1/2 (ERK), JunN-terminal kinase (JNK), NF-κB, and β-arrestin 2 protein expression were evaluated in lung and liver with Western blot analysis. In addition, leukotriene B4 (LTB4), prostaglandin E2 (PGE2), cytokines, and lipoxin A4 serum content were measured with an enzyme-linked immunosorbent assay (ELISA). Flavocoxid administration improved survival, reduced the expression of NF-κB, COX-2, 5-LOX, TNF-α and IL-6 and increased IL-10 production. Moreover, flavocoxid inhibited the mitogen-activated protein kinases (MAPKs) pathway, preserved β-arrestin 2 expression, reduced blood LTB4, PGE2, TNF-α and IL-6, and increased IL-10 and lipoxin A4 serum levels. The treatment with flavocoxid also protected against the histologic damage induced by CLP and reduced the myeloperoxidase (MPO) activity in the lung and liver. CONCLUSIONS Flavocoxid protects mice from sepsis, suggesting that this dual inhibitor may represent a promising approach in such a life-threatening condition.
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Affiliation(s)
- Alessandra Bitto
- Department of Clinical and Experimental Medicine and Pharmacology, Section of Pharmacology, University of Messina, via C. Valeria Gazzi, Messina, 98125, Italy
| | - Letteria Minutoli
- Department of Clinical and Experimental Medicine and Pharmacology, Section of Pharmacology, University of Messina, via C. Valeria Gazzi, Messina, 98125, Italy
| | - Antonio David
- Department of Neurosciences, Psychiatry and Anaesthesiology, University of Messina, via C. Valeria Gazzi, Messina, 98125, Italy
| | - Natasha Irrera
- Department of Clinical and Experimental Medicine and Pharmacology, Section of Pharmacology, University of Messina, via C. Valeria Gazzi, Messina, 98125, Italy
| | - Mariagrazia Rinaldi
- Department of Clinical and Experimental Medicine and Pharmacology, Section of Pharmacology, University of Messina, via C. Valeria Gazzi, Messina, 98125, Italy
| | - Francesco S Venuti
- Department of Neurosciences, Psychiatry and Anaesthesiology, University of Messina, via C. Valeria Gazzi, Messina, 98125, Italy
| | - Francesco Squadrito
- Department of Clinical and Experimental Medicine and Pharmacology, Section of Pharmacology, University of Messina, via C. Valeria Gazzi, Messina, 98125, Italy
| | - Domenica Altavilla
- Department of Clinical and Experimental Medicine and Pharmacology, Section of Pharmacology, University of Messina, via C. Valeria Gazzi, Messina, 98125, Italy
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Zheng MS, Li G, Li Y, Seo CS, Lee YK, Jung JS, Song DK, Bae HB, Kwak SH, Chang HW, Kim JR, Son JK. Protective constituents against sepsis in mice from the root barks of Ulmus davidiana var. japonica. Arch Pharm Res 2011; 34:1443-50. [DOI: 10.1007/s12272-011-0905-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Revised: 05/19/2011] [Accepted: 05/31/2011] [Indexed: 10/17/2022]
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18
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DeClue AE, Sharp CR, Cohen RL, Leverenz EF, Reinero CR. Cysteinyl-leukotriene receptor antagonism blunts the acute hypotensive response to endotoxin in cats. J Feline Med Surg 2010; 12:754-9. [PMID: 20719552 PMCID: PMC11135526 DOI: 10.1016/j.jfms.2010.05.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2010] [Revised: 05/19/2010] [Accepted: 05/25/2010] [Indexed: 10/19/2022]
Abstract
This study evaluated the effects of a cysteinyl-leukotriene-1 (cys-LT(1)) receptor antagonist, zarfirlukast, during feline endotoxemia. Six adult, sexually intact male cats received either placebo or zarfirlukast (10mg, PO) and endotoxin (2 μg/kg/h q 6h) in a cross-over design. Rectal temperature, heart rate, systolic arterial blood pressure, plasma tumor necrosis factor (TNF) activity, interleukin (IL)-6 concentration and urine cys-LT to creatinine ratio were evaluated. The rectal temperature, plasma TNF activity and IL-6 concentrations were significantly higher and systolic arterial blood pressure and heart rate significantly lower after endotoxin infusion. Cats treated with zafirlukast had a significantly higher blood pressure at 4h (P=0.002) compared to placebo. Urine cys-LT to creatinine ratio was significantly greater in the cats treated with zafirlukast compared to placebo (P=0.02). Zafirlukast administration ameliorated the acute hypotensive response to endotoxin in cats, but failed to significantly alter rectal temperature, heart rate or production of TNF and IL-6.
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Affiliation(s)
- Amy E DeClue
- Department of Medicine and Surgery, College of Veterinary Medicine, University of Missouri, 900 E Campus Drive, Columbia, MO 65211, USA.
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Inhibition of NF-kappaB activity prevents downregulation of alpha1-adrenergic receptors and circulatory failure during CLP-induced sepsis. Shock 2009; 32:239-46. [PMID: 19106815 DOI: 10.1097/shk.0b013e3181994752] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The reduced pressure response to norepinephrine during sepsis has directed our interest to the regulation of alpha1-adrenergic receptors. Because nuclear factor (NF)-kappaB occupies a prominent role in the inflammatory cascade, we hypothesized that NF-kappaB downregulates alpha1-receptors by liberation of proinflammatory cytokines and thereby contributes to septic circulatory failure. Sepsis was induced by cecal ligation and puncture (CLP) in wild-type mice and mice with deficiencies for proinflammatory cytokines, and mice were injected with TNF-alpha, IL-1beta, IFN-gamma, or IL-6. Animals were treated with glucocorticoids or small interfering RNA (siRNA) targeting multiple cytokines and NF-kappaB. Vascular smooth muscle cells were incubated with cytokines and calcium mobilization, mRNA stability assays, and promoter studies with alpha1-promoter-luciferase constructs were performed. Cecal ligation and puncture treatment resulted in a hyperdynamic circulatory failure, diminished calcium response to norepinephrine, and a significant downregulation of alpha1-receptors. Proinflammatory cytokines also downregulated alpha1-receptors by suppressing promoter activity at the level of gene transcription. However, suppression of single proinflammatory cytokines in cytokine knockout mice did not diminish CLP-induced downregulation of alpha1-receptors. In contrast, blocking multiple cytokines via siRNA pretreatment or glucocorticoid administration attenuated CLP-induced cardiovascular failure and downregulation of alpha1-receptors. Furthermore, inhibiting NF-kappaB activity by siRNA reduced the production of cytokines, prevented circulatory failure and downregulation of alpha1-receptors, and improved survival of septic mice. Our findings indicate that NF-kappaB has a central role in augmenting proinflammatory cytokine production during sepsis, which in turn downregulates alpha1-receptor expression. Our data further define a critical role for NF-kappaB in the pathogenesis of septic shock, indicating that targeting NF-kappaB is a desired therapeutic strategy to treat septic vasoplegia.
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20
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Ding J, Song D, Ye X, Liu SF. A pivotal role of endothelial-specific NF-kappaB signaling in the pathogenesis of septic shock and septic vascular dysfunction. THE JOURNAL OF IMMUNOLOGY 2009; 183:4031-8. [PMID: 19692637 DOI: 10.4049/jimmunol.0900105] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although the role of NF-kappaB in the pathogenesis of sepsis and septic shock has been extensively studied, little is known about the causative contribution of endothelial-intrinsic NF-kappaB to these pathological processes. In this study, we used transgenic (TG) mice (on FVB genetic background) that conditionally overexpress the NF-kappaB inhibitor, mutant I-kappaBalpha, selectively on endothelium and their transgene-negative littermates (wild type (WT)) to define the causative role of endothelial-specific NF-kappaB signaling in septic shock and septic vascular dysfunction. In WT mice, LPS challenge caused systemic hypotension, a significantly blunted vasoconstrictor response to norepinephrine, and an impaired endothelium-dependent vasodilator response to acetylcholine, concomitant with a markedly increased aortic inducible NO synthase expression, significantly elevated plasma and aortic levels of nitrite/nitrate, increased aortic TNF-alpha expression, and decreased aortic endothelial NO synthase (eNOS) expression. In TG mice whose endothelial NF-kappaB was selectively blocked, LPS caused significantly less hypotension and no impairments in vasoconstrictor and endothelium-dependent vasodilator responses, associated with significantly reduced aortic inducible NO synthase expression, decreased plasma and aortic levels of nitrite/nitrate, reduced aortic TNF-alpha expression, and increased aortic eNOS expression. TNF-alpha knockout mice prevented LPS-induced eNOS down-regulation. WT mice subjected to cecal ligation and puncture showed significant systemic hypotension, which was prevented in TG mice. Our data show that selective blockade of endothelial-intrinsic NF-kappaB pathway is sufficient to abrogate the cascades of molecular events that lead to septic shock and septic vascular dysfunction, demonstrating a pivotal role of endothelial-specific NF-kappaB signaling in the pathogenesis of septic shock and septic vascular dysfunction.
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Affiliation(s)
- Jianqiang Ding
- Division of Pulmonary and Critical Care Medicine, Centers for Heart and Lung Research, and Immunology and Inflammation, Feinstein Institute for Medical Research, New Hyde Park, NY 11040, USA
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Calò M, Marini H, Bitto A, Altavilla D, Polito F, Minutoli L, Lo Cascio P, Antoci S, Squadrito F. Protective effects of IRFI-042 in monensin induced neurotoxicity in chicks. Food Chem Toxicol 2008; 46:3528-33. [PMID: 18834916 DOI: 10.1016/j.fct.2008.09.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2008] [Revised: 08/23/2008] [Accepted: 09/02/2008] [Indexed: 11/28/2022]
Abstract
Monensin, a well known ionophore antibiotic, may cause severe damage in neuronal cells by altering Na+/K+-ATPase and Ca2+-ATPase. We investigated whether IRFI-042, a synthetic analogue of vitamin E, may block lipid peroxidation in neuronal cells and protect against monensin neurotoxicity in chicks. Monensin toxicity was induced in chicks by once-daily administration (150 mg/kg by oral gavages), for 8 days. Sham animals received a saline solution and were used as controls. All animals were randomized to receive either IRFI-042 (20 mg/kg) or its vehicle. Survival rate, brain lipid peroxidation, mRNA for neuronal and inducible nitric oxide synthases (nNOS and iNOS) and brain histological evaluations, including immunohistochemical expression of nNOS and iNOS were performed. Monensin administration decreased survival rate, induced behavioural changes, increased brain lipid peroxidation, reduced brain nNOS mRNA and immunostaining and enhanced iNOS mRNA and immunostaining in the brain in chicks. IRFI-042 significantly improved the survival rate and counteracted monensin-induced changes in chick brains. Our data suggest that monensin is responsible of neurotoxicity in chicks by inducing oxidative stress/lipid peroxidation and that IRFI-042 might represent a useful pharmacological approach to protect against the neuronal damage induced by this monovalent carboxylic ionophorous polyether antibiotic.
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Affiliation(s)
- M Calò
- Department of Veterinary Public Health, Section of Veterinary Pharmacology and Toxicology, University of Messina, Italy
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Role of nuclear factor-kappaB-dependent induction of cytokines in the regulation of vasopressin V1A-receptors during cecal ligation and puncture-induced circulatory failure. Crit Care Med 2008; 36:2363-72. [PMID: 18596633 DOI: 10.1097/ccm.0b013e318180b51d] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Here we characterize the impact of nuclear factor-kappaB and cytokines on cecal ligation and puncture-induced circulatory failure and regulation of vasopressin V1A-receptors during inflammation. DESIGN Prospective animal trial. SETTING Laboratory of the Department of Anesthesiology. SUBJECTS Male C57/BL6 mice. INTERVENTIONS The effects of cecal ligation and puncture on hemodynamic parameters and V1A-receptor expression were measured in cytokine knock-out mice, in mice with/without treatment with glucocorticoids or NF-kappaB-inhibitors, in mice pretreated with small interfering RNA silencing NF-kappaB and in mice treated with V1 receptor agonists. Furthermore, the effects of cytokines on V1A-receptor expression were determined. MEASUREMENTS AND MAIN RESULTS Cecal ligation and puncture resulted in a hyperdynamic circulatory failure with diminished blood pressor dose response to V1 receptor agonists and down-regulation of V1A-receptors. Dexamethasone inhibited proinflammatory cytokine production and attenuated cecal ligation and puncture-induced cardiovascular failure in parallel with attenuated down-regulation of V1A-receptor expression. Tumor necrosis factor-alpha, interleukin-1beta, interferon-gamma or interleukin-6 dose-dependently decreased V1A-receptor expression, whereas cecal ligation and puncture-induced down-regulation of V1A-receptors was not affected in cytokine knock-out mice. In contrast, inhibition of NF-kappaB strongly reduced induction of cytokines, prevented septic circulatory failure and down-regulation of V1A-receptor gene expression and improved survival of septic animals. CONCLUSIONS Our data demonstrate that down-regulation of V1A-receptor expression during sepsis may be due to proinflammatory cytokines. Our findings explain the failure of therapeutic strategies targeting single cytokines as well as the success of glucocorticoid therapy and define a critical role for NF-kappaB in the pathogenesis of septic shock.
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Kim BH, Roh E, Lee HY, Lee IJ, Ahn B, Jung SH, Lee H, Han SB, Kim Y. Benzoxathiole Derivative Blocks Lipopolysaccharide-Induced Nuclear Factor-κB Activation and Nuclear Factor-κB-Regulated Gene Transcription through Inactivating Inhibitory κB Kinase β. Mol Pharmacol 2008; 73:1309-18. [DOI: 10.1124/mol.107.041251] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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Seo CS, Lee YK, Kim YJ, Jung JS, Jahng Y, Chang HW, Song DK, Son JK. Protective Effect of Lignans against Sepsis from the Roots of Saururus chinensis. Biol Pharm Bull 2008; 31:523-6. [DOI: 10.1248/bpb.31.523] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | | | | | - Jun-Sub Jung
- Department of Pharmacology, Hallym University College of Medicine, Institute of Natural Medicine
| | | | | | - Dong-Keun Song
- Department of Pharmacology, Hallym University College of Medicine, Institute of Natural Medicine
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Abstract
OBJECTIVE Several studies have implicated the CXCL2 chemokine as a mediator in the development of sepsis. We hypothesized that a tandem repeat polymorphism (AC)n in the CXCL2 gene, previously associated with susceptibility to severe sepsis, contributes to morbidity and mortality in severe sepsis. DESIGN Prospective, observational, genetic study of septic patients. SETTING A network of Spanish postsurgical and critical care units. PATIENTS A total of 183 critically ill patients fulfilling the International Sepsis Criteria for severe sepsis. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS Patients were classified into three groups according to the presence of compound 24 +/- 1 (AC) repeat genotypes: homozygote 24 +/- 1 carriers (HC group), heterozygote 24 +/- 1 carriers (HTC), and non 24 +/- 1 carriers (NC group). Mortality, development of acute respiratory distress syndrome, and number of failing organs were determined for each group. Overall mortality was 46.4%. HC patients had a lower mortality (39.9%) than HTC (52.2%) and NC (72.7%) patients (trend test p = .018). This difference remained significant when using a multiple logistic regression analysis (p = .035). The presence of population stratification was ruled out, since 20 independent genomic control markers demonstrated homogeneity among groups. An exploratory analysis of the effect of acute respiratory distress syndrome on mortality showed a relative risk of 2.60 in the HC group (p = .0004), while in the nonhomozygote carriers (NHC) group the relative risk was 3.34 (p = .0001). CONCLUSIONS Our data suggest that a tandem repeat polymorphism (AC)n at position -665 in the CXCL2 gene may be an independent predictor of mortality for severe sepsis. Additional studies are needed to confirm these results.
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Chatterjee A, Dimitropoulou C, Drakopanayiotakis F, Antonova G, Snead C, Cannon J, Venema RC, Catravas JD. Heat shock protein 90 inhibitors prolong survival, attenuate inflammation, and reduce lung injury in murine sepsis. Am J Respir Crit Care Med 2007; 176:667-75. [PMID: 17615388 PMCID: PMC1994236 DOI: 10.1164/rccm.200702-291oc] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
RATIONALE Severe sepsis is the leading cause of death for patients in intensive care units. Patients with severe sepsis develop multiple organ failure, including acute lung injury (ALI), resulting from a deregulated inflammatory response. Inhibitors of the ubiquitous chaperone, heat shock protein 90 (Hsp90), block the activity of certain proinflammatory mediators in vitro. We hypothesized that Hsp90 inhibitors may ameliorate the inflammation and ALI associated with severe sepsis. OBJECTIVES To test the hypothesis that Hsp90 inhibitors prolong survival, attenuate inflammation, and reduce lung injury in a murine model of sepsis. METHODS Male C57BL/6 mice received either one of two Hsp90 inhibitors, radicicol or 17-allylaminodemethoxygeldanamycin (17-AAG), 24, 12, 6, and 0 hours before receiving a lethal dose of endotoxin (6.75 x 10(4) endotoxin units/g body weight). Outcomes included survival and parameters of systemic inflammation (plasma neutrophil, cytokine, chemokine, and nitrite/nitrate levels), pulmonary inflammation (lung nuclear factor-kappaB and myeloperoxidase activities, inducible nitric oxide synthase expression, inducible nitric oxide synthase-Hsp90 complex formation, and leukocyte infiltration), and lung injury (pulmonary capillary leak and lung function). MEASUREMENTS AND MAIN RESULTS Mice pretreated with vehicle and receiving endotoxin exhibited 100% 24-hour lethality, a dramatic increase in all parameters of systemic and pulmonary inflammation, increased capillary leak, and reduced lung function. Compared with them, mice receiving either radicicol or 17-AAG before endotoxin exhibited prolonged survival, reduced or abolished increases in systemic and pulmonary inflammatory parameters, attenuated capillary leak, and restored, normal lung function. CONCLUSIONS Hsp90 inhibitors may offer a new pharmacological tool in the management of severe sepsis and severe sepsis-induced ALI.
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Affiliation(s)
- Anuran Chatterjee
- Program in Pulmonary Vascular Disease, Vascular Biology Center, Medical College of Georgia, Augusta, GA 30912-2500, USA
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Abstract
Nuclear factor (NF-kappaB)(1) is a eukaryotic transcription factor that may be activated by oxidative stress. Because of this hypothesis, the effect of vitamin E on NF-kappaB activation has been examined in many studies, using both in vivo and in vitro models. Most of these studies have observed that vitamin E inhibits the activation of NF-kappaB, with the greatest inhibition seen with the succinate form. Vitamin E may be inhibiting NF-kappaB by reducing oxidative stress or through one of its nonantioxidant functions; this is not clear at the present time. It also is not known if the inhibition of NF-kappaB is necessary for any of vitamin E's effects on gene expression and the resulting physiological effects.
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Affiliation(s)
- Howard P Glauert
- Graduate Center for Nutritional Sciences, University of Kentucky, Lexington, Kentucky 40506, USA
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Sirmagul B, Kilic FS, Tunc O, Yildirim E, Erol K. Effects of verapamil and nifedipine on different parameters in lipopolysaccharide-induced septic shock. Heart Vessels 2006; 21:162-8. [PMID: 16715191 DOI: 10.1007/s00380-005-0874-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2005] [Accepted: 10/07/2005] [Indexed: 11/25/2022]
Abstract
Septic shock has a high mortality rate due to the hypotension and circulatory disorder that occurs during its pathogenesis. Recently, humoral factors such as cytokines and nitric oxide became important in the complex pathophysiology of septic shock because there is a close relationship between the determined levels of these humoral factors and the responses to the therapy and survival periods. Verapamil and nifedipine are calcium channel blockers commonly used in the pharmacotherapy of cardiovascular disorders. In the present study these drugs were investigated in the rat septic shock model. In vivo hemodynamic parameters were recorded using a data acquisition system in endotoxin-induced septic shock in rats. The animals were followed for 5 h and blood pressure, rectal temperature, and ECG were recorded. Blood samples were collected at 1 h and 5 h time points after the injection of endotoxin, and serological samples were stored at -25 degrees C. Subsequently, tumor necrosis factor-alpha, interleukin-10 (enzyme-linked immunosorbent assay), and nitrite (Griess reagent) were determined in these serological samples. Significant correlations were observed between these humoral factors and the disordered hemodynamic factors. A reversal of changes was observed in the levels of serum cytokines, nitrite levels, and hemodynamic parameters with verapamil and nifedipine preadministration (P<0.05). Additionally, superoxide dismutase (SOD), catalase, and malondialdehyde (MDA) were determined in livers obtained from these animals at the end of the experiments, and these results were compared to hemodynamic parameters and cytokines. Nifedipine and verapamil increased the levels of MDA and SOD but did not change catalase activity.
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Affiliation(s)
- Basar Sirmagul
- Department of Pharmacology, Medical School, Osmangazi University, 26480 Meselik, Eskişehir, Turkey
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Liu SF, Malik AB. NF-kappa B activation as a pathological mechanism of septic shock and inflammation. Am J Physiol Lung Cell Mol Physiol 2006; 290:L622-L645. [PMID: 16531564 DOI: 10.1152/ajplung.00477.2005] [Citation(s) in RCA: 564] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The pathophysiology of sepsis and septic shock involves complex cytokine and inflammatory mediator networks. NF-kappaB activation is a central event leading to the activation of these networks. The role of NF-kappaB in septic pathophysiology and the signal transduction pathways leading to NF-kappaB activation during sepsis have been an area of intensive investigation. NF-kappaB is activated by a variety of pathogens known to cause septic shock syndrome. NF-kappaB activity is markedly increased in every organ studied, both in animal models of septic shock and in human subjects with sepsis. Greater levels of NF-kappaB activity are associated with a higher rate of mortality and worse clinical outcome. NF-kappaB mediates the transcription of exceptional large number of genes, the products of which are known to play important roles in septic pathophysiology. Mice deficient in those NF-kappaB-dependent genes are resistant to the development of septic shock and to septic lethality. More importantly, blockade of NF-kappaB pathway corrects septic abnormalities. Inhibition of NF-kappaB activation restores systemic hypotension, ameliorates septic myocardial dysfunction and vascular derangement, inhibits multiple proinflammatory gene expression, diminishes intravascular coagulation, reduces tissue neutrophil influx, and prevents microvascular endothelial leakage. Inhibition of NF-kappaB activation prevents multiple organ injury and improves survival in rodent models of septic shock. Thus NF-kappaB activation plays a central role in the pathophysiology of septic shock.
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Affiliation(s)
- Shu Fang Liu
- Div. of Pulmonary and Critical Care Medicine, Long Island Jewish Medical Center, RM B371, New Hyde Park, NY 11040, USA.
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Messina S, Altavilla D, Aguennouz M, Seminara P, Minutoli L, Monici MC, Bitto A, Mazzeo A, Marini H, Squadrito F, Vita G. Lipid peroxidation inhibition blunts nuclear factor-kappaB activation, reduces skeletal muscle degeneration, and enhances muscle function in mdx mice. THE AMERICAN JOURNAL OF PATHOLOGY 2006; 168:918-26. [PMID: 16507907 PMCID: PMC1606515 DOI: 10.2353/ajpath.2006.050673] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Duchenne muscular dystrophy (DMD) is a progressive muscle-wasting disease resulting from lack of the sarcolemmal protein dystrophin. However, the mechanism leading to the final disease status is not fully understood. Several lines of evidence suggest a role for nuclear factor (NF)-kappaB in muscle degeneration as well as regeneration in DMD patients and mdx mice. We investigated the effects of blocking NF-kappaB by inhibition of oxidative stress/lipid peroxidation on the dystrophic process in mdx mice. Five-week-old mdx mice received three times a week for 5 weeks either IRFI-042 (20 mg/kg), a strong antioxidant and lipid peroxidation inhibitor, or its vehicle. IRFI-042 treatment increased forelimb strength (+22%, P < 0.05) and strength normalized to weight (+23%, P < 0.05) and decreased fatigue (-45%, P < 0.05). It also reduced serum creatine kinase levels (P < 0.01) and reduced muscle-conjugated diene content and augmented muscle-reduced glutathione (P < 0.01). IRFI-042 blunted NF-kappaB DNA-binding activity and tumor necrosis factor-alpha expression in the dystrophic muscles (P < 0.01), reducing muscle necrosis (P < 0.01) and enhancing regeneration (P < 0.05). Our data suggest that oxidative stress/lipid peroxidation represents one of the mechanisms activating NF-kappaB and the consequent pathogenetic cascade in mdx muscles. Most importantly, these new findings may have clinical implications for the pharmacological treatment of patients with DMD.
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Affiliation(s)
- Sonia Messina
- Department of Neuroscience, Psychiatry, and Anaesthesiology, University of Messina, Messina, Italy
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31
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Hauser B, Kick J, Iványi Z, Asfar P, Ehrmann U, Muth CM, Albicini M, Wachter U, Vogt J, Bauer M, Brückner UB, Radermacher P, Bracht H. Effects of 15-deoxy-Δ12,14-prostaglandin-J2 during hyperdynamic porcine endotoxemia. Intensive Care Med 2006; 32:759-65. [PMID: 16534570 DOI: 10.1007/s00134-006-0107-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2005] [Accepted: 02/06/2006] [Indexed: 10/24/2022]
Abstract
OBJECTIVE To investigate the hemodynamic and metabolic effects of the peroxisome proliferator-activated receptor (PPAR)-gamma ligand and nuclear-factor (NF)-kappa B inhibitor 15-deoxy-Delta12,14-prostaglandin-J2 (15d-PGJ2) during long-term, hyperdynamic porcine endotoxemia. DESIGN Prospective, randomized, controlled experimental study with repeated measures. SETTING Investigational animal laboratory. SUBJECTS 19 anesthetized, mechanically ventilated and instrumented pigs. INTERVENTIONS At 12 h of continuous intravenous endotoxin and hydroxyethylstarch to keep mean arterial pressure (MAP)>60 mmHg, swine randomly received vehicle (control group, n=10) or 15-deoxy-Delta12,14-prostaglandin-J2 (15d-PGJ2 group, n=9; 1 microg kg(-1) min(-1) loading dose during 1 h; thereafter,0.25 microg kg(-1) min(-1) for 11 h). MEASUREMENTS AND RESULTS Hemodynamic, metabolic and organ function parameters were assessed together with parameters of nitric oxide production and oxidative stress. 15d-PGJ2 prevented the endotoxin-induced progressive hypotension, due to a positive inotropic effect, which resulted in a significantly higher blood pressure during the treatment phase and prevented the rise in hepatic vein alanine-aminotransferase activity. It did not affect, however, any other parameter of organ function nor of nitric oxide production, proinflammatory cytokine release or lipid peroxidation (8-isoprostane). CONCLUSIONS 15d-PGJ2 stabilized systemic hemodynamics, due to improved myocardial performance, and resulted in an only transient effect on alanine-aminotransferase activity, without further beneficial effect on endotoxin-induced metabolic and organ function derangements. Low tissue 15d-PGJ2 concentrations and/or the delayed drug administration may explain these findings.
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Affiliation(s)
- Balázs Hauser
- Sektion Anästhesiologische Pathophysiologie und Verfahrensentwicklung, Universitätsklinikum, Parkstrasse 11, 89073, Ulm, Germany
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Godbout JP, Berg BM, Krzyszton C, Johnson RW. Alpha-tocopherol attenuates NFkappaB activation and pro-inflammatory cytokine production in brain and improves recovery from lipopolysaccharide-induced sickness behavior. J Neuroimmunol 2005; 169:97-105. [PMID: 16146653 DOI: 10.1016/j.jneuroim.2005.08.003] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2005] [Accepted: 08/03/2005] [Indexed: 02/07/2023]
Abstract
This study was conducted to determine if alpha-tocopherol facilitates recovery from lipopolysaccharide (LPS)-induced sickness behavior through a NFkappaB-dependent mechanism. In the first study, 3 daily intraperitoneal (i.p.) injections of alpha-tocopherol (20 mg) improved recovery from sickness behavior induced by i.p. injected LPS. Furthermore, alpha-tocopherol pretreatment attenuated LPS-activated NFkappaB and pro-inflammatory cytokine production in brain. In addition, inhibiting NFkappaB activity in the brain specifically by ICV injection of a NFkappaB decoy prior to LPS, significantly accelerated recovery from LPS-induced sickness behavior. Taken together, these data indicate alpha-tocopherol modulates sickness behavior and inflammatory cytokine production in the brain through an NFkappaB-dependent pathway.
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Affiliation(s)
- J P Godbout
- Division of Nutritional Sciences and Department of Animal Sciences, University of Illinois, 1207 W. Gregory Drive, Urbana, IL 61801, USA
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Calò M, Altavilla D, Seminara P, Marini H, Minutoli L, Bitto A, Naccari F, Squadrito F. Inhibition of lipid peroxidation by IRFI 042, a vitamin E analogue, decreases monensin cardiotoxicity in chicks. Toxicol Appl Pharmacol 2005; 208:137-44. [PMID: 16183387 DOI: 10.1016/j.taap.2005.01.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2004] [Revised: 01/28/2005] [Accepted: 01/29/2005] [Indexed: 10/25/2022]
Abstract
Monensin, a well-known ionophore antibiotic, may cause severe damage in myocardial cells. We investigated whether IRFI 042, a new analogue of vitamin E, may block lipid peroxidation in myocardial cells and in turn protect against monensin toxicity. Monensin toxicity was induced by repeated daily administration of the ionophore antibiotic (150 mg/kg/day for 7 days). Sham animals received by oral gavages only a saline solution and were used as controls. All animals were randomized to receive concomitantly by oral gavages IRFI 042 (20 mg/kg) or its vehicle. The experiment lasted 8 days. Survival rate, heart lipid peroxidation, studied by means of thiobarbituric acid-reactive substances (TBARs) levels, cardiac expression of endothelial nitric oxide (e-NOS) and histological analysis of the heart were performed. Monensin administration caused a decrease in survival rate. Mortality appeared following the second monensin injection and at day 7 caused a survival rate of 20%. Thereafter, no further mortality was observed. IRFI 042 administration improved survival rate. Injection of the ionophore antibiotic resulted in a marked cardiac lipid peroxidation and in a significant reduction in cardiac e-NOS message and protein expression. IRFI 042 decreased heart TBARs levels (Monensin + vehicle = 6.5 +/- 0.8 nmol/mg; Monensin + IRFI 042 = 3.2 +/- 1.1 nmol/mg; P < 0.001) and increased e-NOS message and protein expression. Histological analysis showed that IRFI 042 improved myocardial cells damage and enhanced the depressed e-NOS expression in chick heart samples following monensin administration. Our data suggest that IRFI 042 is a promising drug to reduce monensin cardio-toxicity in chicks.
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Affiliation(s)
- Margherita Calò
- Department of Veterinary Public Health, Section of Veterinary Pharmacology and Toxicology, University of Messina, Polo Universitario Annunziata, 98100 Messina, Italy
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Rak Min K, Lee H, Hak Kim B, Chung E, Min Cho S, Kim Y. Inhibitory effect of 6-hydroxy-7-methoxychroman-2-carboxylic acid phenylamide on nitric oxide and interleukin-6 production in macrophages. Life Sci 2005; 77:3242-57. [PMID: 15978634 DOI: 10.1016/j.lfs.2005.05.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2004] [Revised: 03/29/2005] [Accepted: 05/23/2005] [Indexed: 11/26/2022]
Abstract
6-Hydroxy-7-methoxychroman-2-carboxylic acid phenylamide (CP compound) is a novel chemically synthetic compound with vitamin E-like chemical structure. In the present study, the CP compound was discovered to inhibit nitric oxide (NO) and interleukin (IL)-6 productions in lipopolysaccharide (LPS)-stimulated macrophages. Further, CP compound attenuated LPS-induced synthesis of mRNA and protein levels of inducible NO synthase (iNOS), in parallel, and inhibited iNOS promoter activity. In the similar way, CP compound inhibited LPS-induced synthesis of IL-6 transcript but also IL-6 promoter activity. These results indicate that CP compound could down-regulate LPS-induced iNOS and IL-6 expression at the transcription step. As a mechanism of the anti-inflammatory action shown by CP compound, suppression of LPS-induced activation of both nuclear factor-kappaB (NF-kappaB) and activator protein-1 (AP-1) has been documented. Finally, CP compound could provide an invaluable tool to investigate LPS-induced NF-kappaB and AP-1 activation, in addition to its therapeutic potential in NO- and IL-6-associated inflammatory diseases.
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Affiliation(s)
- Kyung Rak Min
- College of Pharmacy and Research Center for Bioresource and Health, Chungbuk National University, Cheongju 361-763, Korea.
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Song DK, Kim JY, Li G, Lee KS, Seo CS, Yan JJ, Jung JS, Kim HJ, Chang HW, Son JK. Agents protecting against sepsis from the roots of Angelica dahurica. Biol Pharm Bull 2005; 28:380-2. [PMID: 15684506 DOI: 10.1248/bpb.28.380] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the course of isolating agents preventing sepsis from the EtOAc extract of the roots of Angelica dahurica, four known furanocoumarins, isoimperatorin (1), oxypeucedanin (2), (+/-)-byakangelicin (3), and (+)-oxypeucedanin hydrate (4), were isolated as active compounds based on the in vivo assay model of sepsis induced by lipopolysaccharide (LPS) and D-galactosamine (D-GalN). Among them, 3 showed the highest survival rate (100% with a dose of 30 mg/kg versus 20% for the control experiment) and decreased the plasma levels of tumor necrosis factor-alpha and alanine aminotransferase in mice adminstered LPS/D-GalN.
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Affiliation(s)
- Dong-Keun Song
- Department of Pharmacology, Hallym University College of Medicine, Institute of Natural Medicine, Chunchon 200-702, Republic of Korea
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36
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Li G, Seo CS, Lee KS, Kim HJ, Chang HW, Jung JS, Song DK, Son JK. Protective constituents against sepsis in mice from the root cortex of Paeonia suffruticosa. Arch Pharm Res 2005; 27:1123-6. [PMID: 15595414 DOI: 10.1007/bf02975116] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The bioassay-guided fractionation of protective agents against sepsis-induced lethality from the root cortex of Paeonia suffruticosa ANDREWS (Ranunculaceae) led to the isolation of eight known compounds: paeonol (1), 2,5-dihydroxy-4-methoxyacetophenone (2), acetovanillone (3), paeonoside (4), paeoniflorin (5), oxypaeoniflorin (6), apiopaeonoside (7), and methyl 3-hydroxy-4-methoxybenzoate (8). Among them, 3 showed the highest survival rate (100% with a dose of 30 mg/kg versus 17% for the control experiment) and reduced alanine aminotransferase level to be a half of the control value on the sepsis model induced by lipopolysaccharide/D-galactosamine.
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Affiliation(s)
- Gao Li
- College of Pharmacy, Yanbian University, Yanji 133000, P R China
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Romeo C, Antonuccio P, Esposito M, Marini H, Impellizzeri P, Turiaco N, Altavilla D, Bitto A, Zuccarello B, Squadrito F. Raxofelast, a hydrophilic vitamin E-like antioxidant, reduces testicular ischemia-reperfusion injury. ACTA ACUST UNITED AC 2004; 32:367-71. [PMID: 15316698 DOI: 10.1007/s00240-004-0436-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2003] [Accepted: 05/05/2004] [Indexed: 10/26/2022]
Abstract
Testis torsion is a surgical emergency that lead to permanent gonad damage. The damage has been ascribed to mechanisms of ischemia-reperfusion similar to other tissues. The mechanisms involved are different, but the lipid peroxidation of plasma membrane, caused by reactive oxygen species (ROS), generated particularly during reperfusion, is one of the most accredited. In the present study, we aimed to evaluate the effects of raxofelast, a vitamin E-like antioxidant with potent action and no systemic toxicity, on lipid peroxidation and histopathology in both testes after unilateral testicular torsion and detorsion. Adult male Wistar rats were subjected to total occlusion (3 h) of the left testis followed by 4 hours of reperfusion (TI/R). Sham testicular ischemia-reperfusion rats (SHAM TI/R) were used as controls. The animals were then randomized to receive either vehicle (1 ml/kg/i.p. of a dimetylsulphoxide/NaCl 0.9% 1:10 v/v solution, injected either 15 min before detorsion and 15 min after detorsion) or raxofelast (20 mg/kg i.p. 15 min before detorsion and 15 min after detorsion). Conjugated dienes (CD) levels, an index of lipid peroxidation, and testis histopathology were evaluated. Testicular ischemia reperfusion (TI/R) in untreated rats produced high testicular levels of CD (3.6+/-0.3 DeltaABS/g protein on the left side and 2.5+/-0.2 DeltaABS/g protein on the right side). Furthermore, histological examination revealed marked damage to the testis interstitium with severe haemorrhage and edema. The administration of raxofelast lowered CD levels (2.8+/-0.2 DeltaABS/g protein on the left side and 1.9+/-0.1 DeltaABS/g protein in the right side) and significantly reduced histological damage. These data suggest that the hydrophilic vitamin E-like antioxidants are good candidates for designing a novel therapeutic strategy to halt the oxidative stress that follows acute testis torsion.
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Affiliation(s)
- Carmelo Romeo
- Department of Medical and Pediatric Surgical Sciences, Neonatal Surgery Unit, University of Messina, Via Consolare Valeria-Gazzi, 98124 Messina, Italy.
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Marini H, Altavilla D, Bellomo M, Adamo EB, Marini R, Laureanti F, Bonaccorso MC, Seminara P, Passaniti M, Minutoli L, Bitto A, Calapai G, Squadrito F. Modulation of IL-1 beta gene expression by lipid peroxidation inhibition after kainic acid-induced rat brain injury. Exp Neurol 2004; 188:178-86. [PMID: 15191814 DOI: 10.1016/j.expneurol.2004.03.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2003] [Revised: 03/29/2004] [Accepted: 03/30/2004] [Indexed: 10/26/2022]
Abstract
Brain injury was induced by intraperitoneal administration of kainic acid (KA, 10 mg/kg). Animals were randomized to receive either IRFI 042 (20 mg/kg i.p.), a lipid peroxidation inhibitor, or its vehicle (NaCl 0.9% DMSO 10% 1 ml/kg i.p.) 30 min before KA administration. A first set of animals was sacrificed 6 h after KA injection to measure malondialdehyde (MDA) content, glutathione-reduced (GSH) levels and the mRNA for interleukin-1beta (IL-1beta) in the cortex and in the hippocampus. A second set of animals was sacrificed 48 h after KA administration for histological analysis. All animals were observed for monitoring the behavioral sequelae and for evaluating latency of convulsions. Sham brain injury rats were used as controls. Intraperitoneal administration of IRFI 042 significantly decreased brain MDA (cortex: KA + vehicle = 0.285 +/- 0.04 nmol/mg protein; KA + IRFI 042 = 0.156 +/- 0.02 nmol/mg protein, P < 0.005; hippocampus: KA + vehicle = 0.350 +/- 0.03 nmol/mg protein; KA + IRFI 042 = 0.17 +/- 0.04 nmol/mg protein, P < 0.005), prevented the brain loss of GSH in both cortex (KA + vehicle = 7.81 +/- 1 micromol/g protein; KA + IRFI 042 = 12.1 +/- 1 micromol/g protein; P < 0.005) and hippocampus (KA + vehicle = 5 +/- 0.8 micromol/g protein; KA + IRFI 042 = 9.4 +/- 1.8 micromol/g protein; P < 0.005), reduced both brain IL-1beta mRNA expression and oedema, and increased latency of convulsions. Histological analysis showed a reduction of cell damage in IRFI 042-treated samples. The present data indicate that lipid peroxidation inhibition reduces IL-1beta gene expression and protects against kainic acid-induced brain damage.
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Affiliation(s)
- Herbert Marini
- Section of Pharmacology, Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy
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Abstract
During the past decade, enormous advances have been made in cell biology. Major advances included the publication of the human genome sequence, the development of proteomics, and DNA microarray technologies and techniques to selectively "silence" genes using short strands of double-stranded RNA. Some areas of great progress that are particularly relevant to critical care medicine include huge improvements in our understanding of the signal transduction pathways involved in the innate immune response and adaptation to hypoxia. Other areas of important progress include improvements in our understanding of how inflammation causes derangements in epithelial structure and function and impairs cellular utilization of oxygen.
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Affiliation(s)
- Mitchell P Fink
- Departments of Critical Care Medicine and Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
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Marini H, Costa C, Passaniti M, Esposito M, Campo GM, Ientile R, Adamo EB, Marini R, Calabresi P, Altavilla D, Minutoli L, Pisani F, Squadrito F. Levetiracetam protects against kainic acid-induced toxicity. Life Sci 2004; 74:1253-64. [PMID: 14697408 DOI: 10.1016/j.lfs.2003.08.006] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We investigated the Levetiracetam (LVT) ability to protect the brain against kainic acid (KA) induced neurotoxicity. Brain injury was induced by intraperitoneal administration of KA (10 mg/kg). Sham brain injury rats were used as controls. Animals were randomized to receive either LVT (50 mg/kg) or its vehicle (1 ml/kg) 30 min. before KA administration. Animals were sacrificed 6 hours after KA injection to measure brain malonildialdehyde (MDA), glutathione levels (GSH) and the mRNA for interleukin-1beta (IL-1beta) in the cortex and in the diencephalon. Behavioral changes were also monitored. Intraperitoneal administration of LVT decreased significantly MDA in the cortex (KA + vehicle = 0.25 +/- 0.03 nmol/mg protein; KA + LVT = 0.13 +/- 0.01 nmol/mg protein; P < 0.005), and in the diencephalons (KA + vehicle = 1,01 +/- 0.2 nmol/mg protein; KA + LVT = 0,33 +/- 0,08 nmol/mg protein; P < 0.005), prevented the brain loss of GSH in both cortex (KA + vehicle = 5 +/- 1 micromol/g protein; KA + LVT = 15 +/- 2 micromol/g protein; P < 0.005) and diencephalons (KA + vehicle = 9 +/- 0.8 micromol/g protein; KA + LVT = 13 +/- 0.3 micromol/g protein; P < 0.05), reduced brain IL-1beta mRNA and markedly controlled seizures. Histological analysis showed a reduction of cell damage in LVT treated samples. The present data indicate that LVT displays neuro-protective effects against KA induced brain toxicity and suggest that these effects are mediated, at least in part, by inhibition of lipid peroxidation.
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Affiliation(s)
- Herbert Marini
- Department of Clinical and Experimental Medicine and Pharmacology, Section of Pharmacology, Azienda Ospedaliera Universitario "G. Martino", Torre Biologica 5th Floor Via Consolare Valeria Gazzi, 98100 Messina, Italy
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42
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