1
|
Liu J, Zheng M, Zhao X, Zha YJ, Li HN, Huang GQ. Effects of vasoactive drugs on hepatic and intestinal circulation and intestinal barrier in patients with septic shock. J Investig Med 2021; 69:jim-2020-001685. [PMID: 33441480 DOI: 10.1136/jim-2020-001685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/29/2020] [Indexed: 01/11/2023]
Abstract
In this study, 60 patients with septic shock were selected over the course of 1 year, and the effects of dopamine and norepinephrine combined with dobutamine on hepatic and intestinal circulation and intestinal barrier in patients with septic shock were studied by comparison between the control group and the experimental group. All patients received mechanical ventilation to maintain breathing at 14 to 20 times/min. The experimental group was treated with vascular active drugs after adequate rehydration, and the control group only received adequate rehydration. There were extremely significant differences (p<0.01) in the total effective rate of each group. There were significant differences in the hemodynamic indexes in each group (p<0.05). There was a significant difference in total 24-hour bile output (p<0.01). There were significant differences in liver function and blood lipid values in patients (p<0.01). There were significant differences in the repair of epithelial injury at 0 hour, 48 hours and 96 hours (p<0.01). There were significant differences in the transmembrane resistance of monolayer cells (p<0.01). The expression differences of three proteins ZO-1, occludin and β-actin were also significant, among which the three proteins in the control group were weak, while those in groups A and B were strong. The expression of tight junction protein in monolayer cells was weakly positive in expression and strong in other proteins. In conclusion, vasoactive drugs had significant effects on hepatic and intestinal circulation and intestinal barrier in patients with septic shock.
Collapse
Affiliation(s)
- Jie Liu
- Emergency and Critical Care Center, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei, China
| | - Min Zheng
- Department of Anesthesia, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei, China
| | - Xu Zhao
- Emergency and Critical Care Center, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei, China
| | - Yong-Jiu Zha
- Emergency and Critical Care Center, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei, China
| | - Hu-Nian Li
- Emergency and Critical Care Center, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei, China
| | - Guang-Qing Huang
- Emergency and Critical Care Center, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei, China
| |
Collapse
|
2
|
Yeoh BS, Gewirtz AT, Vijay-Kumar M. Adaptive Immunity Induces Tolerance to Flagellin by Attenuating TLR5 and NLRC4-Mediated Innate Immune Responses. Front Cell Infect Microbiol 2019; 9:29. [PMID: 30838179 PMCID: PMC6390806 DOI: 10.3389/fcimb.2019.00029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 01/31/2019] [Indexed: 12/02/2022] Open
Abstract
The host immune system is constantly exposed to diverse microbial ligands, including flagellin (FliC; a ligand for TLR5 and NLRC4) and lipopolysaccharide (LPS; a ligand for TLR4), which could induce immune tolerance to subsequent exposure. Herein, we investigated the extent to which FliC induces self-tolerance in vivo and the role of adaptive immunity in mediating such effect. Mice pre-treated with FliC displayed attenuated serum keratinocyte-derived chemokine (KC), interleukin (IL)-6 and IL-18 responses to secondary challenge of FliC. A negative correlation was observed between high anti-FliC titer and reduced KC, IL-6, and IL-18 responses upon FliC re-challenge in WT mice, but not Rag1KO mice, suggesting that adaptive immunity could tolerize TLR5 and NLRC4. However, administration of LPS during FliC pre-treatment impaired the generation of anti-FliC antibodies and resulted in a partial loss of self-tolerance to FliC re-challenge. These findings may be relevant in the context of bacterial infection, as we observed that anti-FliC response are protective against systemic infection by Salmonella typhimurium. Taken together, our study delineates a distinct co-operative and reciprocal interaction between the innate and adaptive arms of immunity in modulating their responses to a bacterial protein.
Collapse
Affiliation(s)
- Beng San Yeoh
- Graduate Program in Immunology and Infectious Disease, Pennsylvania State University, University Park, PA, United States
| | - Andrew T Gewirtz
- Center for Inflammation, Immunity and Infection, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, United States
| | - Matam Vijay-Kumar
- Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, United States.,Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, United States
| |
Collapse
|
3
|
Chen W, Zhang J, Zhang P, Hu F, Jiang T, Gu J, Chang Q. Role of TLR4-MAP4K4 signaling pathway in models of oxygen-induced retinopathy. FASEB J 2019; 33:3451-3464. [PMID: 30475644 DOI: 10.1096/fj.201801086rr] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Retinopathy of prematurity is a vision-threatening condition, and therapies based on antagonizing VEGF may elicit serious side effects in premature infants. Mechanisms of retinal angiogenesis, particularly the signaling pathways independent of VEGF, remain elusive. The goals of our study were to explore TLR4-mediated signaling pathways in human retinal microvascular endothelial cells (HRMECs) and to examine the effects of TLR4 antagonists in models of oxygen-induced retinopathy (OIR). Our results show that intravitreal injection of the TLR4 antagonist TAK-242 reduced areas of nonperfusion, inhibited aberrant angiogenesis, and improved vascular density in the retina of OIR mice. The effects were further potentiated by the anti-VEGF antibody ranibizumab. In cultured HRMECs, the TLR4 agonist LPS up-regulated TLR4/MAPKK kinase kinase 4 (MAP4K4) signaling, and promoted cell proliferation and migration, and reduced barrier functions of the cells. Down-regulation of MAP4K4 in HRMECs abolished the proangiogenic effects by LPS. Our data suggest that the TLR4-MAP4K4 pathway can regulate retinal neovascularization via mechanisms independent of VEGF.-Chen, W., Zhang, J., Zhang, P., Hu, F., Jiang, T., Gu, J., Chang, Q. Role of TLR4-MAP4K4 signaling pathway in models of oxygen-induced retinopathy.
Collapse
Affiliation(s)
- Wenwen Chen
- Department of Ophthalmology and Vision Science, Eye and Ear, Nose and Throat Hospital, Fudan University, Shanghai, China
- Key Laboratory of Myopia of National Health Commission, Fudan University, Shanghai, China
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
- Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Juan Zhang
- Department of Ophthalmology and Vision Science, Eye and Ear, Nose and Throat Hospital, Fudan University, Shanghai, China
- Key Laboratory of Myopia of National Health Commission, Fudan University, Shanghai, China
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
- Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Peijun Zhang
- Department of Ophthalmology and Vision Science, Eye and Ear, Nose and Throat Hospital, Fudan University, Shanghai, China
- Key Laboratory of Myopia of National Health Commission, Fudan University, Shanghai, China
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
- Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Fangyuan Hu
- Department of Ophthalmology and Vision Science, Eye and Ear, Nose and Throat Hospital, Fudan University, Shanghai, China
- Key Laboratory of Myopia of National Health Commission, Fudan University, Shanghai, China
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
- Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Tingting Jiang
- Department of Ophthalmology and Vision Science, Eye and Ear, Nose and Throat Hospital, Fudan University, Shanghai, China
- Key Laboratory of Myopia of National Health Commission, Fudan University, Shanghai, China
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
- Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Junxiang Gu
- Department of Ophthalmology and Vision Science, Eye and Ear, Nose and Throat Hospital, Fudan University, Shanghai, China
- Key Laboratory of Myopia of National Health Commission, Fudan University, Shanghai, China
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
- Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Qing Chang
- Department of Ophthalmology and Vision Science, Eye and Ear, Nose and Throat Hospital, Fudan University, Shanghai, China
- Key Laboratory of Myopia of National Health Commission, Fudan University, Shanghai, China
- Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
- Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| |
Collapse
|
4
|
Abstract
Necrotizing enterocolitis (NEC), a disease most commonly seen in preterm infants, often presents without warning and is associated with very high mortality and morbidity. Progress in the prevention and treatment of NEC has been slow. In this article, we will discuss some of the reasons as to why this progress has been slow. We will describe some of the factors that appear to be highly associated and important components in the pathophysiology of NEC. We will discuss the intestinal microbial environment of the fetus as well as the preterm infant and how interaction of dysbiosis with an immature gastrointestinal tract combined with dietary factors play a role in the pathogenesis of NEC. Testable hypotheses are discussed as well as how these may lead to not only a better understanding of the pathophysiology of the disease but also the preventative strategies.
Collapse
Affiliation(s)
- Josef Neu
- Section of Neonatology, Department of Pediatrics, University of Florida, 1600 SW Archer Rd # 2, Gainesville, FL 32610.
| | - Mohan Pammi
- Section of Neonatology, Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX
| |
Collapse
|
5
|
Role of translocated bacterial flagellin in monocyte activation among individuals with chronic HIV-1 infection. Clin Immunol 2015; 161:180-9. [PMID: 26344864 DOI: 10.1016/j.clim.2015.08.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 05/07/2015] [Accepted: 08/31/2015] [Indexed: 11/22/2022]
Abstract
Monocyte activation has been identified as a predictor of mortality and morbidity in HIV-1 infection. This study investigated translocated bacterial flagellin as a potential contributor to systemic monocyte activation via Toll-like receptor 5 (TLR5) stimulation.We demonstrated that circulating flagellin correlated to anti-flagellin, which was associated with soluble markers of microbial translocation (LPS, LBP) and monocyte activation (sCD14, sCD163). Flagellin exposure in vitro reduced monocyte TLR5 expression and the magnitude of reduction was correlated to anti-flagellin levels, indicative of previous flagellin exposure. Circulating anti-flagellin and basal TLR5 expression were both associated with basal and flagellin-stimulated monocyte cytokine production, where HIV + and HIV − differed in their cytokine patterns (IL-1β, IL-6, IL-8).Our results suggest that translocated flagellin contributes to systemic immune activation in HIV-1 infection and reduces monocyte surface TLR5 expression resulting in a hyperactivated state with elevated basal cytokine production and reduced ability to respond to further TLR5 stimulation.
Collapse
|
6
|
Zawahir S, Li G, Banerjee A, Shiu J, Blanchard TG, Okogbule-Wonodi AC. Inflammatory and Immune Activation in Intestinal Myofibroblasts Is Developmentally Regulated. J Interferon Cytokine Res 2015; 35:634-40. [PMID: 26101946 DOI: 10.1089/jir.2014.0071] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
We previously demonstrated that intestinal myofibroblasts from immature tissue produce excessive IL-8 in response to Escherichia coli lipopolysaccharide (LPS) compared to cells from mature tissue. However, it is unknown whether other cytokines and TLR agonists contribute to this developmentally regulated response. The aim of this study was to further characterize differences in inflammatory signaling in human primary intestinal fibroblasts from fetal (FIF) and infant (IIF) tissue and examine their potential to activate the adaptive immune response in vitro. Cytokine profiles of LPS-stimulated FIF and IIF were assessed by cytokine profile array. IL-8, IL-6, and IL-10 production in response to TLR2, TLR2/6, TLR4, and TLR5 agonists was determined by quantitative ELISA. The potential of activated myofibroblasts to activate adaptive immunity was determined by measuring surface class II MHC expression using flow cytometry. LPS-stimulated FIF produced a distinct proinflammatory cytokine profile consisting of MCP-1, GRO-alpha, IL-6, and IL-8 expression. FIF produced significant IL-8 and IL-6 in response to TLR4 agonist. IIF produced significant levels of IL-8 and IL-6 in the presence of TLR5 and TLR2 agonists. IFN-γ-treated FIF expressed greater HLA-DR levels compared to unstimulated controls and IFN-γ- and LPS-treated IIF. Activated FIF produce a more diverse inflammatory cytokine profile and greater levels of IL-8 and IL-6 in response to TLR4 stimulation compared to IIF. FIF express class II MHC proteins associated with activation of the adaptive immune response. These data suggest that FIF may contribute to bacterial-associated gut inflammation in the immature intestine.
Collapse
Affiliation(s)
- Sharmila Zawahir
- 1 Department of Pediatrics, University of Maryland School of Medicine , Baltimore, Maryland
| | - Guanghui Li
- 2 Department of Anesthesiology, University of Maryland School of Medicine , Baltimore, Maryland
| | - Aditi Banerjee
- 1 Department of Pediatrics, University of Maryland School of Medicine , Baltimore, Maryland
| | - Jessica Shiu
- 1 Department of Pediatrics, University of Maryland School of Medicine , Baltimore, Maryland
| | - Thomas G Blanchard
- 1 Department of Pediatrics, University of Maryland School of Medicine , Baltimore, Maryland
| | | |
Collapse
|
7
|
Yue S, Hu B, Wang Z, Yue Z, Wang F, Zhao Y, Yang Z, Shen M. Salvia miltiorrhiza compounds protect the liver from acute injury by regulation of p38 and NFκB signaling in Kupffer cells. PHARMACEUTICAL BIOLOGY 2014; 52:1278-1285. [PMID: 25026357 DOI: 10.3109/13880209.2014.889720] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
CONTEXT Salvia miltiorrhiza Bunge is a traditional Asian medicine used to treat cerebral and cardiac ischemia. However, the effects of the active compounds of S. miltiorrhiza on liver damage are unclear. OBJECTIVE In this study, we tested the effects on acute liver injury of crude S. miltiorrhiza extracts from roots as well as neotanshinone B, dehydromiltirone, tanshinol A, tanshinone I, dihydrotanshinono I, neotanshinone A, cryptanshinono, tanshinone II A, and salvianolie acid B from purified S. miltiorrhiza extracts. MATERIALS AND METHODS Various compounds or ethanol extract of S. miltiorrhiza (50, 100, and 200 mg/kg, p.o.) were administered to rats for five consecutive days. After acute carbon tetrachloride (CCl4)-induced liver injury by treatment of rats with a single dose of CCl4 (0.75 mL/kg, p.o), rat liver function was tested by measuring serum biochemical parameters. Serum cytokine concentrations were assessed by enzyme-linked immunosorbent assay (ELISA). Expression of p38 and NFκB was evaluated by western blot. RESULTS All S. miltiorrhiza components showed their effects on liver function from the dose from 50 to 200 mg/kg. At the dose of 200 mg/kg, they reduced serum levels of alkaline phosphatase (ALP) by 34-77%, alanine aminotransferase (ALT) by 30-57%, aspartate aminotransferase (AST) by 43-72%, creatine total bilirubin (BIL-T) by 33-81%, albumin (ALB) by 37-67%, indicating that S. miltiorrhiza extracts protected liver from CCl4-induced damage. Moreover, S. miltiorrhiza extracts at 200 mg/kg reduced the increase in the proinflammatory cytokines tumor necrosis factor-α (TNF-α) by 25-82%, interleukin-1 (IL-1) by 42-74% and interleukin-6 (IL-6) by 67-83%, indicating an effect on alleviating liver inflammation. Furthermore, in vitro, S. miltiorrhiza extracts inhibited p38 and NFκB signaling in Kupffer cells. This effect could be a main mechanism by which S. miltiorrhiza protects against acute liver toxicity. DISCUSSION AND CONCLUSION Active compounds of S. miltiorrhiza protected the liver from CCl4-induced injury. Protection might have been due to inhibition of p38 and NFκB signaling in Kupffer cells, which subsequently reduced inflammation in the liver.
Collapse
Affiliation(s)
- Shuqiang Yue
- Department of Hepatobiliary Surgery, Xijing Hospital, the Fourth Military Medical University , Xi'an , China
| | | | | | | | | | | | | | | |
Collapse
|
8
|
Zhang Y, Luo F, Li A, Qian J, Yao Z, Feng X, Chu Y. Systemic injection of TLR1/2 agonist improves adoptive antigen-specific T cell therapy in glioma-bearing mice. Clin Immunol 2014; 154:26-36. [PMID: 24928324 DOI: 10.1016/j.clim.2014.06.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 04/24/2014] [Accepted: 06/03/2014] [Indexed: 01/07/2023]
Abstract
Adoptive immunotherapy is an attractive strategy for glioma treatment. However, some obstacles still need be overcome. In this study, GL261-bearing mice treated with adoptively transferred antigen-specific T cells and systemic injection of bacterial lipoprotein (BLP), a TLR1/2 agonist, got a long-term survival and even immune protection. By analyzing adoptive T cells, it was found that BLP maintained T cell survival, proliferation and anti-tumor efficacy in the brains of tumor-bearing hosts. Moreover, tumor microenvironment was modified by up-regulating IFN-γ-secreting CD8+ T cells and down-regulating MDSC, which might be related with high CXCL10 and low CCL2 expression. In addition, TLR2 deficiency abrogated therapeutic effect with increased MDSC accumulation and decreased IFN-γ-secreting CD8+ T cells in the brains. Thus, the systemic injection of BLP could improve the adoptive T cell therapy by maintaining T cell persistence, modifying the tumor microenvironment and even inducing systemic anti-tumor immunity, which might offer a clinically promising immunotherapeutic strategy for glioma.
Collapse
Affiliation(s)
- Yufei Zhang
- Department of Immunology, School of Basic Medical Sciences and Biotherapy Research Center, Fudan University, Shanghai, China
| | - Feifei Luo
- Department of Immunology, School of Basic Medical Sciences and Biotherapy Research Center, Fudan University, Shanghai, China
| | - Anning Li
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
| | - Jiawen Qian
- Department of Immunology, School of Basic Medical Sciences and Biotherapy Research Center, Fudan University, Shanghai, China
| | - Zhenwei Yao
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiaoyuan Feng
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
| | - Yiwei Chu
- Department of Immunology, School of Basic Medical Sciences and Biotherapy Research Center, Fudan University, Shanghai, China.
| |
Collapse
|
9
|
|
10
|
Abstract
Necrotizing enterocolitis (NEC) primarily affects premature infants. It is less common in term and late preterm infants. The age of onset is inversely related to the postmenstrual age at birth. In term infants, NEC is commonly associated with congenital heart diseases. NEC has also been associated with other anomalies. More than 85% of all NEC cases occur in very low birth weight infants or in very premature infants. Despite incremental advances in our understanding of the clinical presentation and pathophysiology of NEC, universal prevention of this disease continues to elude us even in the twenty-first century.
Collapse
MESH Headings
- Age of Onset
- Disease Management
- Enterocolitis, Necrotizing/diagnosis
- Enterocolitis, Necrotizing/epidemiology
- Enterocolitis, Necrotizing/therapy
- Humans
- Infant, Newborn
- Infant, Premature/physiology
- Infant, Premature, Diseases/diagnosis
- Infant, Premature, Diseases/epidemiology
- Infant, Premature, Diseases/therapy
- Intestinal Perforation/diagnosis
- Intestines/diagnostic imaging
- Intestines/microbiology
- Intestines/physiopathology
- Pneumoperitoneum/diagnosis
- Prevalence
- Radiography
- Risk
Collapse
Affiliation(s)
- Renu Sharma
- Division of Neonatology, Department of Pediatrics, University of Florida College of Medicine at Jacksonville, 655 West 8th Street, Jacksonville, FL 32209, USA.
| | | |
Collapse
|
11
|
Wang D, Xiao PL, Duan HX, Zhou M, Liu J, Li W, Luo KL, Chen JJ, Hu JY. Peptidoglycans promotes human leukemic THP-1 cell apoptosis and differentiation. Asian Pac J Cancer Prev 2012; 13:6409-13. [PMID: 23464467 DOI: 10.7314/apjcp.2012.13.12.6409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The innate immune system coordinates the inflammatory response to pathogens. To do so, its cells must discriminate self from non-self utilizing receptors that identify molecules synthesized exclusively by microbes. Toll- like receptors have a crucial role in the detection of microbial infection in mammals and insects. In mammals, they have evolved to recognize conserved products unique to microbial metabolism. These include lipopolysaccharide (LPS), lipotechoic acids, and peptidoglycans (PGN). We show here that TLRs, including TLR2, are expressed on the THP-1 human leukemia cell line. Activation of TLR2 signaling in THP-1 by PGN induces the synthesis of various soluble factors and proteins including interleukin-1β, interleukin-8 and TNF-α and apoptosis of THP-1 with PGN dose and time dependence. Moreover , in this study we show that PGN induces apoptosis of THP-1 cells in a TNF-α-dependent manner. These findings indicate that TLR2 signaling results in a cascade leading to tumor apoptosis and differentiation, which may suggest new clinical prospects using TLR2 agonists as cytotoxic agents in certain cancers.
Collapse
Affiliation(s)
- Di Wang
- Department of Hematolgy and Oncology, Hunan Provincial People's Hospital, Changsha, China
| | | | | | | | | | | | | | | | | |
Collapse
|