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Dai SX, Wang Y, Lin LF, Yuan TM. [Effect of PR-957 on the formation of A1 reactive astrocytes]. Zhongguo Dang Dai Er Ke Za Zhi 2019; 21:1110-1115. [PMID: 31753094 PMCID: PMC7389308 DOI: 10.7499/j.issn.1008-8830.2019.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 09/27/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To study the effect of PR-957 on the formation of A1 reactive astrocytes. METHODS The cerebral cortices of 1-day-old female rats were obtained and cultured for primary astrocytes. These cells were divided into 3 groups: control, lipopolysaccharide (LPS), and LPS+PR-957. The LPS group was treated with LPS (at a concentration of 5 μmol/L) for 48 hours; the LPS+PR-957 group was treated with PR-957 (at a final concentration of 200 nmol/L) for 1 hour and then LPS for 48 hours. Enzyme-linked immunosorbent assay was used to determine the expression of complement 3 (C3, a marker for A1 reactive astrocytes) and tumor necrosis factor alpha (TNF-α). Quantitative real-time PCR was used to determine the relative mRNA expression of glypican-6 (GPC6), SPARC-like 1 (SPARCL1), and lipocalin-2 (LCN2). All the above experiments were repeated three times independently. RESULTS C3 expression was almost not observed in the control group, but was observed in both the LPS group and the LPS+PR-957 group, with significantly lower expression observed in the LPS+PR-957 group (P<0.05). The expression of TNF-α was consistent with that of C3. Compared with the control group, the LPS and the PS+PR-957 groups had significantly reduced mRNA expression levels of GPC6 and SPARCL1 but significantly increased mRNA expression level of LCN2 (P<0.001). Compared with the LPS group, the LPS+PR-957 group had significantly increased mRNA expression levels of GPC6 and SPARCL1 but significantly reduced mRNA expression level of LCN2 (P<0.001). CONCLUSIONS LPS can induce the transformation from astrocytes to A1 reactive astrocytes, and PR-957 can inhibit the formation of LPS-induced A1 reactive astrocytes.
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Affiliation(s)
- Shu-Xin Dai
- Department of Neonatology, Children's Hospital of Zhejiang University, Hangzhou 310003, China.
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Guo Y, Liu CQ, Liu GP, Huang ZP, Zou DJ. Roux-en-Y gastric bypass decreases endotoxemia and inflammatory stress in association with improvements in gut permeability in obese diabetic rats. J Diabetes 2019; 11:786-793. [PMID: 30714321 DOI: 10.1111/1753-0407.12906] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 01/12/2019] [Accepted: 01/28/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Postoperative modulation of the gut microbiome has been suggested to contribute to the metabolic benefits after metabolic surgery, but the mechanisms underlying these metabolic benefits remain unknown. Previously, we reported that Roux-en-Y gastric bypass (RYGB) surgery in Zucker diabetic fatty (ZDF) rats increased the abundance of Proteobacteria and Gammaproteobacteria. However, theoretically, these Gram-negative bacteria may elevate lipopolysaccharide (LPS) levels. Therefore, in this study we further investigated the potential mechanisms by which RYGB improves glucose homeostasis, endotoxemia, and inflammatory stress in ZDF rats. METHODS Rats were divided into three groups: (a) an RYGB group (RY); (b) a sham-operated group pair-fed with the RY group; and (c) a sham-operated group fed ad libitum. Changes in LPS, cytokine levels, intestinal permeability (evaluated using the fluorescein isothiocyanate-dextran method), and intestinal epithelial tight junction proteins zona occludins (ZO)-1, occludin, and claudin-1 were assessed 10 weeks postoperatively. RESULTS Rats that underwent RYGB exhibited sustained weight loss and reduced glucose, as well as lower cytokine and LPS concentrations, than rats in the control groups. In the colonic epithelium, ZO1 and claudin-1 (Cldn1) mRNA levels were higher in the RY than control groups. Intestinal permeability declined in the RY group and was positively correlated with LPS levels and negatively correlated with ZO-1, occludin, and claudin-1 expression. CONCLUSIONS The results demonstrate that RYGB can reduce the extent of endotoxemia and inflammation, which is associated with improved tight junction integrity and intestinal barrier strength. These effects may explain why a low level of inflammation is maintained after RYGB and the postoperative increase in Gram-negative bacteria.
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Affiliation(s)
- Yan Guo
- Department of Endocrinology, Changhai Hospital, The Second Military Medical University, Shanghai, China
| | - Chao-Qian Liu
- Department of General Surgery, Changhai Hospital, The Second Military Medical University, Shanghai, China
| | - Guo-Ping Liu
- Department of General Surgery, Changhai Hospital, The Second Military Medical University, Shanghai, China
| | - Zhi-Ping Huang
- Department of Hepatobiliary Surgery, General Hospital of Southern Theatre Command, Guangzhou, China
| | - Da-Jin Zou
- Department of Endocrinology, Changhai Hospital, The Second Military Medical University, Shanghai, China
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Zheng J, Yuan X, Zhang C, Jia P, Jiao S, Zhao X, Yin H, Du Y, Liu H. N-Acetylcysteine alleviates gut dysbiosis and glucose metabolic disorder in high-fat diet-fed mice. J Diabetes 2019; 11:32-45. [PMID: 29845722 DOI: 10.1111/1753-0407.12795] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 05/17/2018] [Accepted: 05/25/2018] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND N-Acetylcysteine (NAC), an antioxidative reagent for clinical diseases, shows potential in the treatment of diabetes and other metabolic diseases. However, it is unknown how NAC modulates the gut microbiota of mice with metabolic syndrome. The aim of the present study was to demonstrate the preventive effect of NAC on intestinal dysbiosis and glucose metabolic disorder. METHODS Mice (C57BL/6J strain) were fed either a normal chow diet (NCD), NCD plus NAC, a high-fat diet (HFD), or HFD plus NAC for 5 months, after which glucose levels, circulating endotoxins and key metabolism-related proteins were determined. Fecal samples were analyzed by 16S rRNA sequencing. A novel analysis was performed to predict functional changes in gut microbiota. In addition, Spearman's correlation analysis was performed between metabolic biomarkers and bacterial abundance. RESULTS Treatment with NAC significantly reversed the glucose intolerance, fasting glucose concentrations, and gains in body weight and plasma endotoxin in HFD-fed mice. Further, NAC upregulated occludin and mucin glycoprotein levels in the proximal colon of HFD-treated mice. Noticeably, NAC promoted the growth of beneficial bacteria (i.e. Akkermansia, Bifidobacterium, Lactobacillus and Allobaculum) and decreased populations of diabetes-related genera, including Desulfovibrio and Blautia. In addition, NAC may affect the metabolic pathways of intestinal bacteria, including lipopolysaccharide biosynthesis, oxidative stress, and bacterial motility. Finally, the modified gut microbiota was closely associated with the metabolic changes in NAC-treated HFD-fed mice. CONCLUSIONS N-Acetylcysteine may be a potential drug to prevent glucose metabolic disturbances by reshaping the structure of the gut microbiota.
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Affiliation(s)
- Junping Zheng
- Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
- University of Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Biochemical Engineering and Key Laboratory of Biopharmaceutical Production & Formulation Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Xubing Yuan
- University of Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Biochemical Engineering and Key Laboratory of Biopharmaceutical Production & Formulation Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Chen Zhang
- State Key Laboratory of Biochemical Engineering and Key Laboratory of Biopharmaceutical Production & Formulation Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Peiyuan Jia
- State Key Laboratory of Biochemical Engineering and Key Laboratory of Biopharmaceutical Production & Formulation Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Siming Jiao
- State Key Laboratory of Biochemical Engineering and Key Laboratory of Biopharmaceutical Production & Formulation Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Xiaoming Zhao
- Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Heng Yin
- Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Yuguang Du
- State Key Laboratory of Biochemical Engineering and Key Laboratory of Biopharmaceutical Production & Formulation Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Hongtao Liu
- State Key Laboratory of Biochemical Engineering and Key Laboratory of Biopharmaceutical Production & Formulation Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
- Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou, China
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Jiang WW, Gao LL, Wu M, Zhao T, Shen DL. [Effect of lipoxin A4 on the expression of Toll-like receptor 4 and TNF receptor-associated factor 6 in the liver of obese rats with sepsis]. Zhongguo Dang Dai Er Ke Za Zhi 2018; 20:578-584. [PMID: 30022762 PMCID: PMC7389195 DOI: 10.7499/j.issn.1008-8830.2018.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 06/05/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To study the protective effect of lipoxin A4 (LXA4) against sepsis induced by lipopolysaccharide (LPS) in rats with obesity and its effect on the expression of Toll-like receptor 4 (TLR4) and TNF receptor-associated factor 6 (TRAF6) in the liver. METHODS A total of 60 male Sprague-Dawley rats aged three weeks were randomly divided into a normal group and an obesity group, with 30 rats in each group. A rat model of obesity was established by high-fat diet. Each of the two groups was further randomly divided into control group, sepsis group, and LXA4 group, and 8 rats were selected from each group. The rats in the control, sepsis, and LXA4 groups were treated with intraperitoneal injection of normal saline, LPS, and LXA4+LPS respectively. Twelve hours later, blood samples were collected from the heart and liver tissue samples were also collected. ELISA was used to measure the serum levels of interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α). Western blot was used to measure the protein expression of TLR4 and TRAF6 in liver tissue. Quantitative real-time PCR was used to measure the mRNA expression of TLR4 and TRAF6. RESULTS After being fed with high-fat diet for 6 weeks, the obesity group had significantly higher average weight and Lee's index than the normal group (P<0.05). Compared with the normal group, the obesity group had significant increases in the serum levels of IL-6 and TNF-α (P<0.05). In the normal group or the obesity group, the sepsis subgroup had significant increases in the serum levels of IL-6 and TNF-α compared with the control subgroup (P<0.05), while the LXA4 subgroup had significant reductions in the two indices compared with the sepsis subgroup (P<0.05). Compared with the normal group, the obesity group had significant increases in the protein and mRNA expression of TLR4 and TRAF6 (P<0.05). In the normal group or the obesity group, the sepsis subgroup had significant increases in the protein and mRNA expression of TLR4 and TRAF6 compared with the control subgroup (P<0.05). Compared with the sepsis subgroup, the LXA4 subgroup had significant reductions in the protein and mRNA expression of TLR4 and TRAF6 (P<0.05). CONCLUSIONS LXA4 can reduce the serum levels of IL-6 and TNF-α and alleviate inflammatory response. LXA4 can inhibit the expression of TLR4 and TRAF6 in the liver of septic rats, possibly by inhibiting the TLR4 signaling pathway.
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Affiliation(s)
- Wei-Wei Jiang
- Graduate School, Xuzhou Medical University, Xuzhou, Jiangsu 221000, China.
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殷 商, 朱 俊, 罗 莉, 杨 霞, 梁 华, 罗 艳. [Exogenous agmatine inhibits lipopolysaccharide-induced activation and dysfunction of human umbilical vein endothelial cells]. Nan Fang Yi Ke Da Xue Xue Bao 2018; 38:652-660. [PMID: 29997086 PMCID: PMC6765718 DOI: 10.3969/j.issn.1673-4254.2018.06.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To investigate whether exogenous agmatine inhibits lipopolysaccharide (LPS)-induced activation and dysfunction of human umbilical vein endothelial cells (HUVECs) by modulating nuclear factor-κB (NF-κB) and MAPK signal pathways and the production of reactive oxygen species (ROS). METHODS Cultured HUVECs were treated with agmatine at the optimized concentration of 1.0 mmolγL, LPS (10 µgγmL), and LPS + agmatine, with or without pretreatment with the inhibitors of NF-κB (PDTC), p38 (SB203580), and ERK (PD98059) for 1 h. The levels of soluble vascular cell adhesion molecule 1 (VCAM-1), soluble intercellular adhesion molecule 1 (sICAM-1), soluble E-selectin and monocyte chemoattractant protein 1 (MCP-1) in the supernatant were determined using ELISA, and their mRNA expressions, along with heme oxygenase-1 (HO-1), and NAD(P)H: quinone oxidoreductase 1 (NQO-1), were assessed using real-time PCR. ROS production in the cells was determined using 2, 7-dichlorofluoresce in diacetate (DCFH-DA) as the fluorescence probe. The protein expressions of VCAM-1, ICAM-1, p65, phospho-p65 (p-p65), IκBα, p-IκBα, ERK, p-ERK, p38, p-p38, JNK, and p-JNK were detected using Western blotting. RESULTS LPS stimulation for 6 and 24 h significantly increased the levels of sVCAM-1, sICAM-1, sE-selectin and MCP-1 in the supernatant, intracellular ROS production, and the mRNA expressions of these molecules (P<0.05). Intervention with 1 mmolγL agmatine, similar with pretreatment with p38, ERK and NF-κB inhibitors, obviously inhibited such effects of LPS in HUVECs (P<0.05). Agmatine significantly up-regulated the mRNA expression of HO-1 (P<0.05), inhibited LPS-induced phosphorylation of p38, ERK, nuclear p65 and cytoplasmic IκBα, and up-regulated the protein expression of cytoplasmic IκBα. CONCLUSION Agmatine inhibits LPS-induced activation and dysfunction of HUVECs by modulating NF-κB and MAPK signal pathways to down-regulate the expressions of adhesion molecules and chemokines and by up-regulating the expression of HO-1 to reduce ROS production.
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Affiliation(s)
- 商启 殷
- 重庆医科大学附属第一医院检验科,重庆 400016Department of Clinical Laboratory, First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - 俊宇 朱
- 陆军军医大学大坪医院野战外科研究所//创伤、烧伤与复合伤国家重点实验室第一研究室,重庆 400042Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing 400042, China
| | - 莉 罗
- 陆军军医大学大坪医院野战外科研究所//创伤、烧伤与复合伤国家重点实验室第一研究室,重庆 400042Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing 400042, China
| | - 霞 杨
- 四川大学华西医院临床药学部,四川 成都 610041Department of Clinical Pharmacy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 华平 梁
- 陆军军医大学大坪医院野战外科研究所//创伤、烧伤与复合伤国家重点实验室第一研究室,重庆 400042Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing 400042, China
| | - 艳 罗
- 重庆医科大学附属第一医院检验科,重庆 400016Department of Clinical Laboratory, First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
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殷 商, 朱 俊, 罗 莉, 杨 霞, 梁 华, 罗 艳. [Exogenous agmatine inhibits lipopolysaccharide-induced activation and dysfunction of human umbilical vein endothelial cells]. Nan Fang Yi Ke Da Xue Xue Bao 2018; 38:652-660. [PMID: 29997086 PMCID: PMC6765718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Indexed: 10/15/2023]
Abstract
OBJECTIVE To investigate whether exogenous agmatine inhibits lipopolysaccharide (LPS)-induced activation and dysfunction of human umbilical vein endothelial cells (HUVECs) by modulating nuclear factor-κB (NF-κB) and MAPK signal pathways and the production of reactive oxygen species (ROS). METHODS Cultured HUVECs were treated with agmatine at the optimized concentration of 1.0 mmolγL, LPS (10 µgγmL), and LPS + agmatine, with or without pretreatment with the inhibitors of NF-κB (PDTC), p38 (SB203580), and ERK (PD98059) for 1 h. The levels of soluble vascular cell adhesion molecule 1 (VCAM-1), soluble intercellular adhesion molecule 1 (sICAM-1), soluble E-selectin and monocyte chemoattractant protein 1 (MCP-1) in the supernatant were determined using ELISA, and their mRNA expressions, along with heme oxygenase-1 (HO-1), and NAD(P)H: quinone oxidoreductase 1 (NQO-1), were assessed using real-time PCR. ROS production in the cells was determined using 2, 7-dichlorofluoresce in diacetate (DCFH-DA) as the fluorescence probe. The protein expressions of VCAM-1, ICAM-1, p65, phospho-p65 (p-p65), IκBα, p-IκBα, ERK, p-ERK, p38, p-p38, JNK, and p-JNK were detected using Western blotting. RESULTS LPS stimulation for 6 and 24 h significantly increased the levels of sVCAM-1, sICAM-1, sE-selectin and MCP-1 in the supernatant, intracellular ROS production, and the mRNA expressions of these molecules (P<0.05). Intervention with 1 mmolγL agmatine, similar with pretreatment with p38, ERK and NF-κB inhibitors, obviously inhibited such effects of LPS in HUVECs (P<0.05). Agmatine significantly up-regulated the mRNA expression of HO-1 (P<0.05), inhibited LPS-induced phosphorylation of p38, ERK, nuclear p65 and cytoplasmic IκBα, and up-regulated the protein expression of cytoplasmic IκBα. CONCLUSION Agmatine inhibits LPS-induced activation and dysfunction of HUVECs by modulating NF-κB and MAPK signal pathways to down-regulate the expressions of adhesion molecules and chemokines and by up-regulating the expression of HO-1 to reduce ROS production.
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Affiliation(s)
- 商启 殷
- 重庆医科大学附属第一医院检验科,重庆 400016Department of Clinical Laboratory, First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - 俊宇 朱
- 陆军军医大学大坪医院野战外科研究所//创伤、烧伤与复合伤国家重点实验室第一研究室,重庆 400042Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing 400042, China
| | - 莉 罗
- 陆军军医大学大坪医院野战外科研究所//创伤、烧伤与复合伤国家重点实验室第一研究室,重庆 400042Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing 400042, China
| | - 霞 杨
- 四川大学华西医院临床药学部,四川 成都 610041Department of Clinical Pharmacy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 华平 梁
- 陆军军医大学大坪医院野战外科研究所//创伤、烧伤与复合伤国家重点实验室第一研究室,重庆 400042Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing 400042, China
| | - 艳 罗
- 重庆医科大学附属第一医院检验科,重庆 400016Department of Clinical Laboratory, First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
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万 勇, 李 徽, 左 琳, 王 小, 王 黎, 贺 文, 姜 辉, 王 守, 盛 洁, 张 敏, 钱 海, 杨 芳, 谢 红, 高 世, 方 强, 杨 小, 刘 牧. [Intervention with Schistosoma japonicum cysteine protease inhibitor for treatment of lipopolysaccharide-induced sepsis in mice]. Nan Fang Yi Ke Da Xue Xue Bao 2018; 38:625-629. [PMID: 29891463 PMCID: PMC6743891 DOI: 10.3969/j.issn.1673-4254.2018.05.20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To observe the effect of Schistosoma japonicum cysteine protease inhibitor (rSjCystatin) for treatment of lipopolysaccharide (LPS)-induced sepsis in mice. METHODS After a week of adaptive feeding, 54 BALB/c mice were randomly divided into normal control group (group A), sepsis group (group B), and rSjCystatin intervention group (group C). The mice in group A received an intraperitoneal injection of PBS (100 µL), and those in groups B and C were injected with PBS (100 µL) containing LPS (10 mg/kg); the mice in group C were also intraperitoneally injected with 25 µg sjCystatin in 100 µL PBS 30 min after LPS injection. From each group, 10 mice were randomly selected 24 h after PBS or LPS injection for detecting serum levels of TNF-α, IL-6, and IL-10 using ELISA and the levels of ALT, AST, BUN, and Cr using automatic biochemical analyzer; the pathological changes in the liver, lung and kidney were observed with HE staining. The remaining 8 mice in each group were used for observing the changes in the general condition and the 72-h survival. RESULTS The 72-h survival rates of the mice was 100% in group A, 0 in group B, and 36% in group C, showing a significant difference among the 3 groups (P<0.05). Compared with those in group A, the mice in group B exhibited obvious liver, lung, and renal pathologies with increased levels of ALT, AST, BUN, Cr, IL-6, and TNF-α (P<0.05). Treatment with sjCystatin significantly lessened LPS-induced organ pathologies, lowered the levels of liver and renal functional indexes and the pro-inflammatory cytokines, and increased the serum level of IL-10 in the mice (P<0.05). CONCLUSION SjCystatin can produce a significant therapeutic effect on sepsis induced by LPS in mice.
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Affiliation(s)
- 勇坤 万
- 蚌埠医学院 第一附属医院,安徽 蚌埠 233000First Affiliated Hospital1, Bengbu Medical College, Bengbu 233000, China
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 徽徽 李
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 琳 左
- 山西医科大学基础医学院生理系,山西 太原 030000Department of Physiology, College of Basic Medical College, Shanxin Medical University, Taiyuan 030000, China
| | - 小莉 王
- 蚌埠医学院 基础医学院,安徽 蚌埠 233000College of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China
| | - 黎源 王
- 蚌埠医学院 基础医学院,安徽 蚌埠 233000College of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China
| | - 文欣 贺
- 蚌埠医学院 基础医学院,安徽 蚌埠 233000College of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China
| | - 辉 姜
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 守祥 王
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 洁 盛
- 蚌埠医学院 基础医学院,安徽 蚌埠 233000College of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 敏 张
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 海春 钱
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 芳芳 杨
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 红 谢
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 世芳 高
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 强 方
- 蚌埠医学院 基础医学院,安徽 蚌埠 233000College of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 小迪 杨
- 蚌埠医学院 第一附属医院,安徽 蚌埠 233000First Affiliated Hospital1, Bengbu Medical College, Bengbu 233000, China
- 蚌埠医学院 基础医学院,安徽 蚌埠 233000College of Basic Medical Sciences, Bengbu Medical College, Bengbu 233000, China
- 安徽省感染与免疫重点实验室,安徽 蚌埠 233000Key Lab of Infection and Immunology of Anhui Province, Bengbu 233000, China
| | - 牧林 刘
- 蚌埠医学院 第一附属医院,安徽 蚌埠 233000First Affiliated Hospital1, Bengbu Medical College, Bengbu 233000, China
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余 军, 赵 维, 杜 春, 张 娜, 张 卫, 晋 圣, 汪 海, 冯 泽. [Choline improves lipopolysaccharide-induced central nervous system inflammatory response and cognitive dysfunction in mice]. Nan Fang Yi Ke Da Xue Xue Bao 2017; 37:600-606. [PMID: 28539281 PMCID: PMC6780474 DOI: 10.3969/j.issn.1673-4254.2017.05.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To assess the effect of choline in ameliorating lipopolysaccharide (LPS)-induced central nervous system inflammation and cognitive deficits in mice and explore the underlying mechanism. METHODS Seventy-two mice were randomized into saline control group, LPS group, choline intervention group and choline control group. In the latter two groups, the mice received pretreatment with intraperitoneal injections of choline (40 mg/kg, 3 times daily for 3 consecutive days) prior to microinjection of LPS into the lateral cerebral ventricle to induce central nervous system inflammation; in saline and LPS groups, the mice were pretreated with saline in the same manner before intraventicular injection of artificial cerebrospinal fluid. Choline treatment was administered in the mice till the end of the experiment. The locomotor activity and spatial learning and memory capacity of the mice were examined. The expressions of Iba1 protein and proinflammatory cytokines (TNF-α and IL-β) I the hippocampal dentate gyrus, and the expressions of α 7nAchR, p38 MAPK and phosphorylated p38 MAPK in the hippocampus of the mice were detected. RESULTS Water maze test showed that compared with the saline control group, the mice in LPS group exhibited significantly reduced platform crossings (P<0.05), which was significantly increased by choline pretreatment (P<0.05). The mice pretreated with LPS expressed obviously increased levels of IBA-1 protein, TNF-α, and IL-1β in the hippocampus (P<0.01), and choline pretreatment significantly lowered the expressions of IBA-1 protein and IL-1β (P<0.05). The phosphorylation level of p38 MAPK increased significantly after LPS pretreatment (P<0.05), and was reduced by choline pretreatment (P<0.05); α 7nAchR expression increased significantly in choline intervention group as compared with that in the other 3 groups (P<0.05). CONCLUSION Choline can probably antagonize LPS-induced hippocampal p38 MAPK phosphorylation in mice via the α 7nAchR signaling pathway to protective against LPS-induced neuroinflammation and cognitive impairment in mice.
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Affiliation(s)
- 军 余
- 解放军总医院麻醉手术中心,北京 100853Department of Anesthesiology and Operation Center, General Hospital of PLA, Beijing 100853, China
| | - 维星 赵
- 解放军总医院麻醉手术中心,北京 100853Department of Anesthesiology and Operation Center, General Hospital of PLA, Beijing 100853, China
| | - 春彦 杜
- 解放军总医院麻醉手术中心,北京 100853Department of Anesthesiology and Operation Center, General Hospital of PLA, Beijing 100853, China
| | - 娜 张
- 解放军总医院麻醉手术中心,北京 100853Department of Anesthesiology and Operation Center, General Hospital of PLA, Beijing 100853, China
| | - 卫东 张
- 解放军总医院麻醉手术中心,北京 100853Department of Anesthesiology and Operation Center, General Hospital of PLA, Beijing 100853, China
| | - 圣阳 晋
- 中国医学科学院北京协和医学院,北京 100730Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - 海 汪
- 军事医学科学院卫生学环境医学研究所心血管药物研究中心,北京 100850Cardiovascular Drug Research Center, Institute of Hea1th and Environmental Medicine, Academy of Military Medical Sciences, Beijing 100850, China
| | - 泽国 冯
- 解放军总医院麻醉手术中心,北京 100853Department of Anesthesiology and Operation Center, General Hospital of PLA, Beijing 100853, China
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Qi X, Zhao L, Chen S, Meng S, Wu Y. [Effects of Porphyromnonas gingivalis lipopolysaccharide on the expression of RANTES and fractalkine in human urnbilical vein endothelial cells]. Hua Xi Kou Qiang Yi Xue Za Zhi 2016. [PMID: 27337932 PMCID: PMC7029968 DOI: 10.7518/hxkq.2016.02.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
Abstract
OBJECTIVE A study was conducted to investigate the effects of Porphyromonas gingivalis lipopolysaccharide (Pg-LPS) on the expression of regulated upon activation normal T-cell expressed and secreted (RANTES) and fractalkine in human umbilical vein endothelial cells (HUVECs). METHODS HUVECs were incubated with different concentrations of Pg-LPS (200, 500, and 1000 ng x mL(-1)) for 1, 6, 12, and 24 h, respectively. Then real time quantitative polymerase chain reaction (RT-PCR) and enzyme-linked immunosorbent method (ELISA) were adopted to detect the protein levels and mRNA levels of RANTES and fractalkine. RESULTS The RANTES protein levels and mRNA levels, as well as fractalkine mRNA levels, were significantly higher in all experimental groups of 1, 6, and 12 h than in the control group (P<0.05), except the expression of RANTES mRNA in 200 ng x mL(-1) group of 12 h and RANTES protein in 200 ng x mL(-1) group of 1 h. The expression levels of RANTES mRNA and fractalkine mRNA were highest in 1000 ng x mL(-1) group of 6 h and were 4.88- and 6.20-fold higher, respectively, than those in the control group. The expression levels of RANTES protein, mRNA, and fractalkine mRNA decreased 6 h after stimulation, and were significantly higher than those in the control group (P<0.05) in the RANTES and fractalkine in HUVEC, and such expression is important in the development of atherosclerosis 500 ng x mL(-1) group of 24 h. There was a significant difference between the expression of fractalkine mRNA in 1000 ng x mL(-1) group of 6 and 12 h than in the control group (P<0.05). CONCLUSION Pg-LPS infection might up-regulate the expression of RANTES and fractalkine in HUVEC, and such expression is important in the development of atherosclerosis.
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Daonan S, Wei C, Yue J, Lei Z, Yafei W. [Effect of glutaredoxin on oxidative stress of umbilical vein endothelial cell exposed to Porphyromonas gingivalis lipo- polysaccharide]. Hua Xi Kou Qiang Yi Xue Za Zhi 2015; 33:613-616. [PMID: 27051955 PMCID: PMC7030377 DOI: 10.7518/hxkq.2015.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Revised: 06/30/2015] [Indexed: 06/05/2023]
Abstract
OBJECTIVE This study measures the glutaredoxin (Grx) gene and protein expression in umbilical vein endothelial cells upon exposure to Porphyromonas gingivalis (P. gingivalis) lipopolysaccharide (LPS). The involvement of the Akt-signaling pathway is also determined. METHODS EA-hy926 cells were pretreated with 1,000 ng · mL⁻¹ P. gingivalis LPS for 4, 12, 18, and 24 h, and then real-time reverse transcription polymerase chain reaction was employed to detect Grx1 expression. The effect of Grx on Akt activity was investigated using Western blot for the control, LPS (1,000 ng · mL⁻¹ LPS), and carmus- tine (BCNU) groups (1,000 ng · mL⁻¹ LPS, and the EA-hy926 cells were pretreated with 25 μmol · ml⁻¹ BCNU for 30 min). RESULTS Gene expression of Grx1 significantly increased in LPS group compared with that in the control group. The Grx1 expression reached the peak level in 12 h, and the variation between the expression in 4 and 12 h was significant (P < 0.05). After 12 h, the protein levels of Grx and phosphorylated-Akt (p-Akt) significantly increased in the LPS group (P < 0.05), whereas the BCNU group showed a considerable decrease in both Grx and p-Akt expression levels (P < 0.05). Moreover, a slight difference was observed in the total Akt protein levels in the three groups (P > 0.05). CONCLUSION Grx expression increased upon exposure of EA-hy926 cells to the LPS. Akt activity could be inhibited by BCNU (a Grx inhibitor), which indicated that Akt might act as a downstream regulator of Grx.
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Zhan X, Gao J, Liu Y, Hu J, Xue Y, Wu B. [Lactoferrin downregulates the expression of toll like receptor 4 stimulated by lipopolysaccharide in human periodontal ligament cells]. Hua Xi Kou Qiang Yi Xue Za Zhi 2014; 32:166-170. [PMID: 24881213 PMCID: PMC7030810 DOI: 10.7518/hxkq.2014.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Revised: 11/05/2013] [Indexed: 06/03/2023]
Abstract
OBJECTIVE To examine the role of lactoferrin (LF) on Toll like receptor 4 (TLR4) stimulated by lipopolysaccharide (LPS) in human periodontal ligament cells (hPDLCs). METHODS Primary hPDLCs were cultured by tissue block enzymolytic method. Cells obtained from four passages were identified and used in this experiment. Cells without stimulation served as the controls and cells treated with LPS (0.1 microg x mL(-1)) comprised the LPS group. The LPS + LF group was pretreated with LPS (0.1 microg x mL(-1)) for 2 h, and then treated with LF (10 microg x mL(-1)). Four hours after LF stimulation, the mRNA expression levels of TLR4 were examined by real-time quantitative polymerase chain reaction (RT-PCR). The protein expression of TLR4 was observed by cell immunofluorescence staining after LF stimulation of 24 hours. RESULTS TLR4 mRNA expression in the LPS + LF group was significantly more decreased than that in the LPS group (P < 0.05), but exhibited no difference with that in the control group (P > 0.05). Cell immunofluorescence staining showed that the protein expression of TLR4 in the LPS + LF group was significantly more decreased than that in the LPS group (P < 0.05), but exhibited no difference with that in the control group (P > 0.05). CONCLUSION LF can decrease the expression of TLR4 stimulated by LPS in hPDLCs, thus presenting potential application for controlling the TLR4 immune pathway of periodontitis.
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