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https://www.readbyqxmd.com/read/29028772/heme-oxygenase-1-protects-the-liver-from-septic-injury-by-modulating-tlr4-mediated-mitochondrial-quality-control-in-mice
#1
Jin-Sook Park, Hyo-Sun Choi, So-Yeon Yim, Sun-Mee Lee
Mitochondrial dysfunction is involved in the pathogenesis of sepsis-induced multiple organ dysfunction syndrome (MODS). Mitochondrial quality control (QC) is characterized by self-recovering mitochondrial damage through mitochondrial biogenesis, mitophagy, and fission/fusion. Heme oxygenase (HO)-1 acts as a signaling molecule to modulate inflammation. The present study elucidated the cytoprotective mechanisms of HO-1 in sepsis, particularly focusing on toll-like receptor (TLR)4-mediated mitochondrial QC. Mice were subjected to sepsis by cecal ligation and puncture (CLP)...
October 12, 2017: Shock
https://www.readbyqxmd.com/read/29023360/honokiol-increases-cd4-t-cell-activation-and-decreases-tnf-but-fails-to-improve-survival-following-sepsis
#2
Nathan J Klingensmith, Ching-Wen Chen, Zhe Liang, Eileen M Burd, Alton B Farris, Jack L Arbiser, Mandy L Ford, Craig M Coopersmith
Honokiol is a biphenolic isolate extracted from the bark of the magnolia tree that has been used in traditional Chinese and Japanese medicine, and has more recently been investigated for its anti-inflammatory and anti-bacterial properties. Honokiol has previously been demonstrated to improve survival in sepsis models that have rapid 100% lethality. The purpose of this study was to determine the impact of Honokiol on the host response in a model of sepsis that more closely approximates human disease. Male and female C57BL/6 mice underwent cecal ligation and puncture (CLP) to induce polymicrobial intraabdominal sepsis...
October 11, 2017: Shock
https://www.readbyqxmd.com/read/29022140/experimental-study-of-the-protective-effect-of-simvastatin-on-lung-injury-in-rats-with-sepsis
#3
Yu Wang, Wenping Yang, Xin Zhao, Rong Zhang
Simvastatin, which is primarily prescribed to lower cholesterol, may also mitigate lung injury caused by sepsis, although the mechanisms remain elusive. This study aimed to evaluate the protective effect of simvastatin on acute lung injury in rats with sepsis and to investigate possible mechanisms. Male Wistar rats were pretreated with simvastatin (0.2 μg/g) for 1 week before cecal ligation and puncture. Treatment with simvastatin demonstrated significant decreases in the concentration of protein, TNF-α, IL-1β, IL-6, and lipocalin 2, and the number of polymorphonuclear neutrophils in bronchoalveolar lavage fluid in septic rats...
October 11, 2017: Inflammation
https://www.readbyqxmd.com/read/29018138/endotoxin-preconditioning-reprograms-s1-tubules-and-macrophages-to-protect-the-kidney
#4
Takashi Hato, Amy Zollman, Zoya Plotkin, Tarek M El-Achkar, Bernhard F Maier, S Louise Pay, Shataakshi Dube, Pablo Cabral, Momoko Yoshimoto, Jeanette McClintick, Pierre C Dagher
Preconditioning with a low dose of endotoxin confers unparalleled protection against otherwise lethal models of sepsis. The mechanisms of preconditioning have been investigated extensively in isolated immune cells such as macrophages. However, the role of tissue in mediating the protective response generated by preconditioning remains unknown. Here, using the kidney as a model organ, we investigated cell type-specific responses to preconditioning. Compared with preadministration of vehicle, endotoxin preconditioning in the cecal ligation and puncture mouse model of sepsis led to significantly enhanced survival and reduced bacterial load in several organs...
October 10, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28993690/spred2-deficiecy-protects-mice-from-polymicrobial-septic-peritonitis-by-enhancing-inflammation-and-bacterial-clearance
#5
Junya Itakura, Miwa Sato, Toshihiro Ito, Megumi Mino, Soichiro Fushimi, Sakuma Takahashi, Teizo Yoshimura, Akihiro Matsukawa
Sepsis is an infection-induced systemic inflammatory syndrome and a major cause of death for critically ill patients. Here, we examined whether the absence of Sprouty-related EVH1-domain-containing protein 2 (Spred2), a negative regulator of the Ras/Raf/ERK/MAPK pathway, influences host defense against polymicrobial sepsis (PMS) induced by cecal ligation and puncture (CLP). Compared to wild-type mice, Spred2(-/-) mice exhibited higher survival rates with increased level of leukocyte infiltration and local chemokine production and reduced plasma and peritoneal bacterial loads after CLP...
October 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28993270/reduced-silent-information-regulator-1-signaling-exacerbates-sepsis-induced-myocardial-injury-and-mitigates-the-protective-effect-of-a-liver-x-receptor-agonist
#6
Dong Han, Xiang Li, Shuang Li, Tao Su, Wen-Si Fan, Hong-Yu Qiao, Jiang-Wei Chen, Miao-Miao Fan, Xiu-Juan Li, Ya-Bin Wang, Sai Ma, Ya Qiu, Zu-Hong Tian, Feng Cao
Myocardial injury and dysfunction are critical manifestations of sepsis. Previous studies have reported that liver X receptor (LXR) activation is protective during sepsis. However, whether LXR activation protects against septic heart injury and its underlying mechanisms remain elusive. This study was designed to determine the role of LXR activation in the septic heart with a focus on SIRT1 (silent information regulator 1) signaling. Male cardiac-specific SIRT1 knockout mice (SIRT1-/-) and their wild-type littermates were subjected to sepsis by cecal ligation and puncture (CLP) in the presence or absence of LXR agonist T0901317...
October 6, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28991829/sepsis-reduces-bone-strength-before-morphologic-changes-are-identifiable
#7
Zudin A Puthucheary, Yao Sun, Kaiyang Zeng, Lien Hong Vu, Zhi Wei Zhang, Ryan Z L Lim, Nicholas S Y Chew, Matthew E Cove
OBJECTIVES: Survivors of critical illness have an increased prevalence of bone fractures. However, early changes in bone strength, and their relationship to structural changes, have not been described. We aimed to characterize early changes in bone functional properties in critical illness and their relationship to changes in bone structure, using a sepsis rodent model. DESIGN: Experimental study. SETTING: Animal research laboratory. SUBJECTS: Adult Sprague-Dawley rats...
October 6, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28987599/anti-sepsis-protection-of-xuebijing-injection-is-mediated-by-differential-regulation-of-pro-and-anti-inflammatory-th17-and-t-regulatory-cells-in-a-murine-model-of-polymicrobial-sepsis
#8
Xi Chen, Yuxin Feng, Xiya Shen, Guixiang Pan, Guanwei Fan, Xiumei Gao, Jihong Han, Yan Zhu
ETHNOPHARMACOLOGICAL RELEVANCE: Xuebijing injection (XBJ), a Chinese herbal medicine containing extracts from 5 herbs, is frequently used as an add-on with standard therapies to treat sepsis or septic shock with fewer side effects in China. Nonetheless, its mechanism of action on septic shock remains to be unveiled. We explored the differential effects of XBJ on subtypes of CD4+ T cell differentiation and septic shock protection in a murine model to understand the contribution of XBJ to regulation of the inflammation-immune axis function...
October 4, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28965650/acute-ethanol-intoxication-suppresses-pentraxin-3-expression-in-a-mouse-sepsis-model-involving-cecal-ligation-and-puncture
#9
Shogo Kasuda, Risa Kudo, Katsuya Yuui, Yoshihiko Sakurai, Katsuhiko Hatake
Acute ethanol intoxication impairs immunological reactions and increases the risk of sepsis; however, the underlying mechanism remains unclear. Pentraxin (PTX) 3 is a humoral pattern recognition receptor whose levels rapidly increase in response to inflammation. PTX3 production is triggered by tumor necrosis factor (TNF)-α and is mediated by c-Jun N-terminal kinase (JNK). As PTX3 exerts protective effects against sepsis as well as acute lung injury, we investigated whether acute ethanol exposure exacerbates sepsis by altering PTX3 expression...
November 2017: Alcohol
https://www.readbyqxmd.com/read/28962150/inhibition-of-aldh2-expression-aggravates-renal-injury-in-a-rat-sepsis-syndrome-model
#10
Jun-Feng Hu, Hua-Xue Wang, Hui-Hui Li, Jie Hu, Ying Yu, Qin Gao
Mitochondrial aldehyde dehydrogenase 2 (ALDH2) is closely associated with organ injury. The aim of the present study was to investigate the change of ALDH2 expression in a rat model of sepsis-induced acute renal injury, and to observe the effect of ALDH2 inhibition on the kidney. A model of sepsis syndrome was established in Sprague-Dawley (SD) rats by cecal ligation and puncture (CLP). The rats were divided into sham, CLP and CLP + cyanamide (CYA, an ALDH2 inhibitor) groups. The hemodynamic parameters heart rate (HR) and mean arterial blood pressure (MABP) were measured...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28962141/a-comparative-study-of-changes-of-autophagy-in-rat-models-of-clp-versus-lps-induced-sepsis
#11
Binglun Zhang, Chunfeng Liu, Ni Yang, Xiangdie Wang
In the present study, two different rat models of sepsis, cecal ligation and puncture (CLP), and lipopolysaccharide (LPS), were established. Changes in autophagy in both models were compared using transmission electron microscopy (TEM), immunohistochemistry, western blotting, and quantitative polymerase chain reaction techniques. Consequently, TEM analysis revealed autophagic bodies in the CLP and LPS sepsis models. In addition, autophagy-related protein LC3 A-specific staining was detected in the cytoplasm...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28962136/significance-of-hydrogen-sulfide-in-sepsis-induced-myocardial-injury-in-rats
#12
Xiaoqing Li, Qinghong Cheng, Jianhua Li, Yonglai He, Peigang Tian, Chao Xu
Sepsis-induced myocardial injury is a detrimental disorder for intensive care medicine due to its high rates of morbidity and mortality. Data suggest that nuclear factor (NF)-κB serves a critical role in the pathogenesis of myocardial injury. Hydrogen sulfide (H2S) serves an important role in the physiology and pathophysiology of regulatory mechanisms, particularly during an inflammatory reaction. However, the relationship between NF-κB and H2S in sepsis-induced myocardial injury is not well understood, and the underlying mechanisms remain unclear...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28953574/role-of-m2-macrophages-in-sepsis-induced-acute-kidney-injury
#13
Li Xing, Mu Genhua, Song Chunmei, Zhou Liangliang, He Lei, Jin Qin, Lu Zhongqian
BACKGROUND: Sepsis is a major cause of acute kidney injury (AKI), with high rates of morbidity and mortality. M2 macrophages have been shown to play important roles in the secretion of anti-inflammatory and tissue repair mediators. In this study, we investigate the role of M2 macrophages in sepsis-induced AKI by depleting these cells in vivo through the systemic administration of liposomal clodronate (LC). METHODS: Male Sprague-Dawley rats were subjected to cecal ligation and puncture (CLP) or sham surgery...
September 26, 2017: Shock
https://www.readbyqxmd.com/read/28947644/why-is-antibiotic-treatment-not-enough-for-sepsis-resolution-an-evaluation-in-an-experimental-animal-model
#14
Jonathan L Halbach, Andrew W Wang, Dennis Hawisher, David M Cauvi, Radhames E Lizardo, Joseph Rosas, Tony Reyes, Omar Escobedo, Stephen W Bickler, Raul Coimbra, Antonio De Maio
Sepsis remains a major health problem at the level of mortality, morbidity and economic burden to the healthcare system, a condition that is aggravated by the development of secondary conditions, such as septic shock and multiple organ failure. Our current understanding of the etiology of human sepsis has advanced, at least in part, due to the use of experimental animal models, particularly the model of cecum ligation and puncture (CLP). Antibiotic treatment has been commonly used in this model to closely mirror the treatment of human septic patients...
September 25, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28944852/use-of-immunoproteomics-to-identify-immunogenic-proteins-in-a-rat-model-of-acute-respiratory-distress-syndrome
#15
Zongshu Ji, Haiyan Liu, Linsen Fang, Youxin Yu, Zheng Zhou
Acute respiratory distress syndrome (ARDS) is a common and life‑threatening clinical syndrome, and seeking biomarkers of ARDS has been an area of continuing research. The present study hypothesized that alterations to certain immunogenic substances occur in injured lungs and are able to specifically bind with corresponding proteins in the blood, and that these proteins may be readily detected. To investigate this hypothesis, a rat model of ARDS was established by cecal ligation and puncture surgery, and an immunoproteomics approach, using serum as the primary antibody in a western blot analysis, was used with the aim of identifying immunogenic proteins in the injured lungs...
September 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28932195/hydroxysafflor-yellow-a-attenuates-the-apoptosis-of-peripheral-blood-cd4-t-lymphocytes-in-a-murine-model-of-sepsis
#16
Jinping Wang, Ping Wang, Shuiqing Gui, Yun Li, Runhua Chen, Renqing Zeng, Peiyan Zhao, Hanwei Wu, Zheyu Huang, Jianlong Wu
Sepsis is generally considered as a severe condition of inflammation that leads to lymphocyte apoptosis and multiple organ dysfunction. Hydroxysafflor yellow A (HSYA) exerts anti-inflammatory and anti-apoptotic effects in infectious diseases. However, the therapeutic effect of HSYA on polymicrobial sepsis remains unknown. This study was undertaken to investigate the therapeutic effects and the mechanisms of action of HSYA on immunosuppression in a murine model of sepsis induced by cecal ligation and puncture (CLP)...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28931916/salidroside-ameliorates-sepsis-induced-acute-lung-injury-and-mortality-via-downregulating-nf-%C3%AE%C2%BAb-and-hmgb1-pathways-through-the-upregulation-of-sirt1
#17
Kuo-Cheng Lan, Sung-Chuan Chao, Hsiao-Yi Wu, Chia-Lien Chiang, Ching-Chia Wang, Shing-Hwa Liu, Te-I Weng
Sepsis is a life-threatening medical condition. Salidroside, a substance isolated from Rhodiola rosea, possesses antioxidant and anti-inflammatory properties. The effect and mechanism of salidroside on sepsis-induced acute lung injury still remains to be well clarified. Here, we investigated the effect and mechanism of salidroside on septic mouse models and explored the role of salidroside-upregulated SIRT1. Salidroside inhibited the inflammatory responses and HMGB1 productions in bacterial lipopolysaccharide (LPS)-treated macrophages and mice...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28922428/diminished-neutrophil-extracellular-trap-net-formation-is-a-novel-innate-immune-deficiency-induced-by-acute-ethanol-exposure-in-polymicrobial-sepsis-which-can-be-rescued-by-cxcl1
#18
Liliang Jin, Sanjay Batra, Samithamby Jeyaseelan
Polymicrobial sepsis is the result of an exaggerated host immune response to bacterial pathogens. Animal models and human studies demonstrate that alcohol intoxication is a key risk factor for sepsis-induced mortality. Multiple chemokines, such as CXCL1, CXCL2 and CXCL5 are critical for neutrophil recruitment and proper function of neutrophils. However, it is not quite clear the mechanisms by which acute alcohol suppresses immune responses and whether alcohol-induced immunosuppression can be rescued by chemokines...
September 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28915539/astaxanthin-alleviated-acute-lung-injury-by-inhibiting-oxidative-nitrative-stress-and-the-inflammatory-response-in-mice
#19
Jianbin Bi, Ruixia Cui, Zeyu Li, Chang Liu, Jingyao Zhang
The purpose of the present study was to assess the effect of astaxanthin (ASX) treatment on the acute lung injury (ALI) induced by cecal ligation and puncture (CLP) in mice. Mice were randomly allocated into the following groups: (1) the saline control group, in which mice were given saline before sham operation; (2) the ASX control group, in which mice received ASX before sham operation; (3) the ALI group, in which mice were given saline before CLP operation; and (4) the ALI+ASX group, in which mice received ASX before CLP operation...
September 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28912862/astragalus-polysaccharides-combined-with-ibuprofen-exhibit-a-therapeutic-effect-on-septic-rats-via-an-anti-inflammatory-cholinergic-pathway
#20
Li Liu, Shibiao Chen, Xiaoyun Xu, Benchao Hou, Fei Mo
The aim of the present study was to investigate the effects of Astragalus polysaccharides (APS) in combination with ibuprofen (IBU) in the treatment of sepsis and the underlying mechanism. The combined drug treatment was evaluated in a rat model of cecal ligation and puncture (CLP). The serum concentrations of tumor necrosis factor (TNF)-α, interleukin (IL)-6 and acetylcholine (ACh) were determined. Nicotinic acetylcholine (nAChR) α7 receptor expression and histopathological changes in the lung tissue were also observed...
October 2017: Experimental and Therapeutic Medicine
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