1
|
Thanawala SU, Kaplan DE, Falk GW, Beveridge CA, Schaubel D, Serper M, Yang YX. Antibiotic Exposure is Associated With a Risk of Esophageal Adenocarcinoma. Clin Gastroenterol Hepatol 2023; 21:2817-2824.e4. [PMID: 36967101 PMCID: PMC10518027 DOI: 10.1016/j.cgh.2023.03.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 03/02/2023] [Accepted: 03/10/2023] [Indexed: 04/23/2023]
Abstract
BACKGROUND & AIMS Antibiotic exposure leads to changes in the gut microbiota. Our objective was to evaluate the association between antibiotic exposure and esophageal adenocarcinoma (EAC) risk. METHODS We performed a nested case-control study using data from the Veterans Health Administration from 2004 through 2020. The case group consisted of patients who received an incident diagnosis of EAC. For each case, up to 20 matched controls were selected using incidence density sampling. Our primary exposure of interest was any oral or intravenous antibiotic use. Our secondary exposures included cumulative number of days of exposure and classification of antibiotics by various subgroups. Conditional logistic regression was used to estimate the crude and adjusted odds ratios (aORs) for the risk of EAC associated with antibiotic exposure. RESULTS The case-control analysis included 8226 EAC cases and 140,670 matched controls. Exposure to any antibiotic was associated with an aOR for EAC of 1.74 (95% confidence interval [CI], 1.65-1.83) vs no antibiotic exposure. Compared with no antibiotic exposure, the aOR for EAC was 1.63 (95% CI, 1.52-1.74; P < .001) for cumulative exposure to any antibiotic for 1 to 15 days; 1.77 (95% CI, 1.65-1.89; P < 0 .001) for 16 to 47 days; and 1.87 (95% CI, 1.75-2.01; P < .001) for ≥48 days, respectively (P for trend < .001). CONCLUSION Exposure to any antibiotic is associated with an increased risk of EAC, and this risk increases as the cumulative days of exposure increase. This novel finding is hypothesis-generating for potential mechanisms that may play a role in the development or progression of EAC.
Collapse
Affiliation(s)
- Shivani U Thanawala
- Division of Gastroenterology and Hepatology, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.
| | - David E Kaplan
- Division of Gastroenterology and Hepatology, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Division of Gastroenterology, Veterans Health Administration, Philadelphia, Pennsylvania
| | - Gary W Falk
- Division of Gastroenterology and Hepatology, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Claire A Beveridge
- Department of Gastroenterology, Hepatology, and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Douglas Schaubel
- Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Marina Serper
- Division of Gastroenterology and Hepatology, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Division of Gastroenterology, Veterans Health Administration, Philadelphia, Pennsylvania; Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Yu-Xiao Yang
- Division of Gastroenterology and Hepatology, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Division of Gastroenterology, Veterans Health Administration, Philadelphia, Pennsylvania; Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania
| |
Collapse
|
2
|
Jia S, Li X, Du Q. Host insulin resistance caused by Porphyromonas gingivalis-review of recent progresses. Front Cell Infect Microbiol 2023; 13:1209381. [PMID: 37520442 PMCID: PMC10373507 DOI: 10.3389/fcimb.2023.1209381] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/27/2023] [Indexed: 08/01/2023] Open
Abstract
Porphyromonas gingivalis (P. gingivalis) is a Gram-negative oral anaerobic bacterium that plays a key role in the pathogenesis of periodontitis. P. gingivalis expresses a variety of virulence factors that disrupt innate and adaptive immunity, allowing P. gingivalis to survive and multiply in the host and destroy periodontal tissue. In addition to periodontal disease, P.gingivalis is also associated with systemic diseases, of which insulin resistance is an important pathological basis. P. gingivalis causes a systemic inflammatory response, disrupts insulin signaling pathways, induces pancreatic β-cell hypofunction and reduced numbers, and causes decreased insulin sensitivity leading to insulin resistance (IR). In this paper, we systematically review the studies on the mechanism of insulin resistance induced by P. gingivalis, discuss the association between P. gingivalis and systemic diseases based on insulin resistance, and finally propose relevant therapeutic approaches. Overall, through a systematic review of the mechanisms related to systemic diseases caused by P. gingivalis through insulin resistance, we hope to provide new insights for future basic research and clinical interventions for related systemic diseases.
Collapse
Affiliation(s)
- Shuxian Jia
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Xiaobing Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Qin Du
- Department of Stomatology, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, China
| |
Collapse
|
3
|
Lin Q, Guan SW, Yu HB. Immuno-oncology-microbiome axis of gastrointestinal malignancy. World J Gastrointest Oncol 2023; 15:757-775. [PMID: 37275452 PMCID: PMC10237027 DOI: 10.4251/wjgo.v15.i5.757] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 03/15/2023] [Accepted: 04/14/2023] [Indexed: 05/12/2023] Open
Abstract
Research on the relationship between the microbiome and cancer has been controversial for centuries. Recent works have discovered that the intratumor microbiome is an important component of the tumor microenvironment (TME). Intratumor bacteria, the most studied intratumor microbiome, are mainly localized in tumor cells and immune cells. As the largest bacterial reservoir in human body, the gut microbiome may be one of the sources of the intratumor microbiome in gastrointestinal malignancies. An increasing number of studies have shown that the gut and intratumor microbiome play an important role in regulating the immune tone of tumors. Moreover, it has been recently proposed that the gut and intratumor microbiome can influence tumor progression by modulating host metabolism and the immune and immune tone of the TME, which is defined as the immuno-oncology-microbiome (IOM) axis. The proposal of the IOM axis provides a new target for the tumor microbiome and tumor immunity. This review aims to reveal the mechanism and progress of the gut and intratumor microbiome in gastrointestinal malignancies such as esophageal cancer, gastric cancer, liver cancer, colorectal cancer and pancreatic cancer by exploring the IOM axis. Providing new insights into the research related to gastrointestinal malignancies.
Collapse
Affiliation(s)
- Quan Lin
- Department of Surgery, Wenzhou Central Hospital, The Dingli Clinical Institute of Wenzhou Medical University, Wenzhou 325000, Zhejiang Province, China
| | - Shi-Wei Guan
- Department of Surgery, Wenzhou Central Hospital, The Dingli Clinical Institute of Wenzhou Medical University, Wenzhou 325000, Zhejiang Province, China
| | - Hai-Bo Yu
- Department of Surgery, Wenzhou Central Hospital, The Dingli Clinical Institute of Wenzhou Medical University, Wenzhou 325000, Zhejiang Province, China
| |
Collapse
|
4
|
Wang X, Sun Y, Fu Y, Wu H, Chen Y, Ye Y, Zhou Q, He L, Zhou E, Wang J, Yang Z. Lysine specific demethylase 1 inhibitor alleviated lipopolysaccharide/D-galactosamine-induced acute liver injury. Eur J Pharmacol 2022; 932:175227. [PMID: 36007605 DOI: 10.1016/j.ejphar.2022.175227] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 08/08/2022] [Accepted: 08/17/2022] [Indexed: 11/19/2022]
Abstract
Acute liver injury is a severe clinical syndrome with markedly high mortality and poor prognosis. An accumulating body of evidence has demonstrated that epigenetic mechanisms have essential roles in the pathogenesis of acute liver injury. Lysine-specific demethylase 1 (LSD1) belongs to the amine oxidase superfamily of flavin adenine dinucleotide (FAD)-dependent enzymes, specifically demethylates H3 lysine 4. In the study, we investigated the effects and mechanisms of LSD1 in lipopolysaccharide (LPS)/D-Galactosamine (D-Gal)-induced acute liver injury in mice. Western blot analysis showed that LSD1 phosphorylation and di-methylated histone H3 on lysine 4 (H3K4me2) protein expression were significantly increased after LPS/D-Gal treatment (2.3 and 2.4 times higher than control respectively). GSK-LSD1 2HCl is an irreversible and selective LSD1 inhibitor. Pre-treatment with LSD1 inhibitor alleviated LPS/D-Gal-induced liver damage, decreased serum levels of alanine transaminase and aspartate aminotransferase in mice. Moreover, the LSD1 phosphorylation level in low, medium, and high LSD1 inhibitor groups was lower by a factor of 1.6, 1.9, and 2.0 from the LPS/D-Gal group, respectively. Mechanistically, LSD1 inhibitor further inhibited NF-κB signaling cascades and subsequently inhibited the production of pro-inflammatory cytokine TNF-α, IL-6, and IL-1β induced by LPS/D-Gal in liver tissues. Furthermore, LSD1 inhibitor upregulated the protein expression of Nrf2/HO-1 signaling pathways, and the activities of related antioxidant enzymes were enhanced. Collectively, our data demonstrated that LSD1 inhibitor protected against the LPS/D-Gal-induced acute liver injury via inhibiting inflammation and oxidative stress, and targeting the epigenetic marker may be a potent therapeutic strategy for acute liver injury.
Collapse
Affiliation(s)
- Xia Wang
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, 528231, People's Republic of China
| | - Youpeng Sun
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, 528231, People's Republic of China
| | - Yiwu Fu
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, 528231, People's Republic of China
| | - Hanpeng Wu
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, 528231, People's Republic of China
| | - Yichun Chen
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, 528231, People's Republic of China
| | - Yingrong Ye
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, 528231, People's Republic of China
| | - Qingqing Zhou
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, 528231, People's Republic of China
| | - Li He
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, 528231, People's Republic of China
| | - Ershun Zhou
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, 528231, People's Republic of China
| | - Jingjing Wang
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, 528231, People's Republic of China.
| | - Zhengtao Yang
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, 528231, People's Republic of China.
| |
Collapse
|
5
|
Pramanik A, Bhattacharyya S. Myeloid derived suppressor cells and innate immune system interaction in tumor microenvironment. Life Sci 2022; 305:120755. [PMID: 35780842 DOI: 10.1016/j.lfs.2022.120755] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/23/2022] [Accepted: 06/27/2022] [Indexed: 12/24/2022]
Abstract
The tumor microenvironment is a complex domain that not only contains tumor cells but also a plethora of other host immune cells. By nature, the tumor microenvironment is a highly immunosuppressive milieu providing growing conditions for tumor cells. A major immune cell population that contributes most in the development of this immunosuppressive microenvironment is the MDSC, a heterogenous population of immature cells. Although found in small numbers only in the bone marrow of healthy individuals, they readily migrate to the lymph nodes and tumor site during cancer pathogenesis. MDSC mediated disruption of antitumor T cell activity is a major cause of the immunosuppression at the tumor site, but recent findings have shown that MDSC mediated dysfunction of other major immune cells might also play an important role. In this article we will review how crosstalk with MDSC alters the activity of both conventional and unconventional immune cells that inhibits the antitumor immunity and promotes cancer progression.
Collapse
Affiliation(s)
- Anik Pramanik
- Immunobiology and Translational Medicine Laboratory, Department of Zoology, Sidho Kanho Birsha University, Purulia 723104, West Bengal, India
| | - Sankar Bhattacharyya
- Immunobiology and Translational Medicine Laboratory, Department of Zoology, Sidho Kanho Birsha University, Purulia 723104, West Bengal, India.
| |
Collapse
|
6
|
Ducharme JB, McKenna ZJ, Deyhle MR. Exercise mitigates the Toll of muscle atrophy: A narrative review of the effects of exercise on Toll-like receptor-4 in leukocytes and skeletal muscle. Am J Physiol Cell Physiol 2022; 322:C581-C589. [PMID: 35171696 DOI: 10.1152/ajpcell.00005.2022] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Conditions characterized by muscle wasting such as cachexia and sarcopenia are devastating at the individual level, and they place a profound burden on public health. Evidence suggests that inflammation is likely a mechanistic contributor to the pathogenesis of these conditions. One specific molecule, lipopolysaccharide, has gained attention due to its role in initiating inflammation. Toll-like receptor-4 is the primary receptor for lipopolysaccharide and has been shown to be implicit in the downstream proinflammatory response associated with lipopolysaccharide. Importantly, Toll-like receptor-4 is expressed on various cell types throughout the human body such as leukocytes and skeletal muscle fibers and may have site-specific effects that contribute to muscle wasting conditions based on the location in which activation occurs. Accordingly, reducing proinflammatory signaling at these locations may be an effective strategy at mitigating muscle wasting. Regular exercise training is believed to elicit anti-inflammatory adaptations, but the mechanisms by which this occurs are yet to be fully understood. Understanding the mechanisms by which Toll-like receptor-4 activation contributes to muscle wasting and how exercise affects this, may allow for the development of a non-pharmacological therapeutic intervention. Therefore, in this review, we summarize the current understanding of the lipopolysaccharide/Toll-like receptor-4 axis in leukocytes and skeletal muscle fibers on the pathogenesis of muscle wasting conditions and we critically examine the current evidence regarding the effects of exercise on this axis.
Collapse
Affiliation(s)
- Jeremy B Ducharme
- Department of Health, Exercise, and Sport Sciences, University of New Mexico, Albuquerque, NM, United States
| | - Zachary J McKenna
- Department of Health, Exercise, and Sport Sciences, University of New Mexico, Albuquerque, NM, United States
| | - Michael R Deyhle
- Department of Health, Exercise, and Sport Sciences, University of New Mexico, Albuquerque, NM, United States
| |
Collapse
|
7
|
Menko AS, DeDreu J, Logan CM, Paulson H, Levin AV, Walker JL. Resident immune cells of the avascular lens: Mediators of the injury and fibrotic response of the lens. FASEB J 2021; 35:e21341. [PMID: 33710665 PMCID: PMC8200928 DOI: 10.1096/fj.202002200r] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 12/09/2020] [Accepted: 12/21/2020] [Indexed: 12/12/2022]
Abstract
Tissues typically harbor subpopulations of resident immune cells that function as rapid responders to injury and whose activation leads to induction of an adaptive immune response, playing important roles in repair and protection. Since the lens is an avascular tissue, it was presumed that it was absent of resident immune cells. Our studies now show that resident immune cells are a shared feature of the human, mouse, and chicken lens epithelium. These resident immune cells function as immediate responders to injury and rapidly populate the wound edge following mock cataract surgery to function as leader cells. Many of these resident immune cells also express MHCII providing them with antigen presenting ability to engage an adaptive immune response. We provide evidence that during development immune cells migrate on the ciliary zonules and localize among the equatorial epithelial cells of the lens adjacent to where the ciliary zonules associate with the lens capsule. These findings suggest that the vasculature‐rich ciliary body is a source of lens resident immune cells. We identified a major role for these cells as rapid responders to wounding, quickly populating each wound were they can function as leaders of lens tissue repair. Our findings also show that lens resident immune cells are progenitors of myofibroblasts, which characteristically appear in response to lens cataract surgery injury, and therefore, are likely agents of lens pathologies to impair vision like fibrosis.
Collapse
Affiliation(s)
- A Sue Menko
- Department of Pathology, Anatomy and Cell Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA.,Department of Ophthalmology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - JodiRae DeDreu
- Department of Pathology, Anatomy and Cell Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Caitlin M Logan
- Department of Pathology, Anatomy and Cell Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Heather Paulson
- Department of Pathology, Anatomy and Cell Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Alex V Levin
- Department of Ophthalmology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA.,Wills Eye Hospital, Philadelphia, PA, USA
| | - Janice L Walker
- Department of Pathology, Anatomy and Cell Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA.,Department of Ophthalmology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| |
Collapse
|
8
|
Galluzzi L, Vacchelli E, Eggermont A, Fridman WH, Galon J, Sautès-Fridman C, Tartour E, Zitvogel L, Kroemer G. Trial Watch: Experimental Toll-like receptor agonists for cancer therapy. Oncoimmunology 2021; 1:699-716. [PMID: 22934262 PMCID: PMC3429574 DOI: 10.4161/onci.20696] [Citation(s) in RCA: 165] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Toll-like receptors (TLRs) are prototypic pattern recognition receptors (PRRs) best known for their ability to activate the innate immune system in response to conserved microbial components such as lipopolysaccharide and double-stranded RNA. Accumulating evidence indicates that the function of TLRs is not restricted to the elicitation of innate immune responses against invading pathogens. TLRs have indeed been shown to participate in tissue repair and injury-induced regeneration as well as in adaptive immune responses against cancer. In particular, TLR4 signaling appears to be required for the efficient processing and cross-presentation of cell-associated tumor antigens by dendritic cells, which de facto underlie optimal therapeutic responses to some anticancer drugs. Thus, TLRs constitute prominent therapeutic targets for the activation/intensification of anticancer immune responses. In line with this notion, long-used preparations such as the Coley toxin (a mixture of killed Streptococcus pyogenes and Serratia marcescens bacteria) and the bacillus Calmette-Guérin (BCG, an attenuated strain of Mycobacterium bovis originally developed as a vaccine against tuberculosis), both of which have been associated with consistent anticancer responses, potently activate TLR2 and TLR4 signaling. Today, besides BCG, only one TLR agonist is FDA-approved for therapeutic use in cancer patients: imiquimod. In this Trial Watch, we will briefly present the role of TLRs in innate and cognate immunity and discuss the progress of clinical studies evaluating the safety and efficacy of experimental TLR agonists as immunostimulatory agents for oncological indications.
Collapse
Affiliation(s)
- Lorenzo Galluzzi
- Université Paris Descartes/Paris V; Sorbonne Paris Cité; Paris, France ; Institut Gustave Roussy; Villejuif, France
| | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Hasan A, Hasan LK, Schnabl B, Greytak M, Yadlapati R. Microbiome of the Aerodigestive Tract in Health and Esophageal Disease. Dig Dis Sci 2021; 66:12-8. [PMID: 33236315 DOI: 10.1007/s10620-020-06720-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 11/15/2020] [Indexed: 02/06/2023]
Abstract
The diverse human gut microbiome is comprised of approximately 40 trillion microorganisms representing up to 1000 different bacterial species. The human microbiome plays a critical role in gut epithelial health and disease susceptibility. While the interaction between gut microbiome and gastrointestinal pathology is increasingly understood, less is known about the interaction between the microbiome and the aerodigestive tract. This review of the microbiome of the aerodigestive tract in health, and alterations in microbiome across esophageal pathologies highlights important findings and areas for future research. First, microbiome profiles are distinct along the aerodigestive tract, spanning the oral cavity to the stomach. In patients with reflux-related disease such as gastro-esophageal reflux disease, Barrett's esophagus, and esophageal adenocarcinoma, investigators have observed an overall increase in gram negative bacteria in the esophageal microbiome compared to healthy individuals. However, whether differences in microbiome promote disease development, or if these shifts are a consequence of disease remains unknown. Interestingly, use of proton pump inhibitor therapy is also associated with shifts in the microbiome, with distinct shifts and patterns along the aerodigestive tract. The relationship between the human gut microbiome and esophageal pathology is a ripe area for investigation, and further understanding of these pathways may promote development of novel targets in prevention and therapy for esophageal diseases.
Collapse
|
10
|
Wang L, Sun J, Wu Z, Lian X, Han S, Huang S, Yang C, Wang L, Song L. AP-1 regulates the expression of IL17-4 and IL17-5 in the pacific oyster Crassostrea gigas. Fish Shellfish Immunol 2020; 97:554-563. [PMID: 31887409 DOI: 10.1016/j.fsi.2019.12.080] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/23/2019] [Accepted: 12/26/2019] [Indexed: 06/10/2023]
Abstract
The activator protein-1 (AP-1) plays an important role in inducing the immune effector production in response to cellular stress and bacterial infection. In the present study, an AP-1 was identified from Pacific oyster Crassostrea gigas (designed as CgAP-1) and its function was investigated in response against lipopolysaccharide (LPS) stimulation. CgAP-1 was consisted of 290 amino acids including a Jun domain and a basic region leucine zipper (bZIP) domain. CgAP-1 shared 98.6% similarities with ChAP-1 from oyster C. hongkongensis, and assigned into the branch of invertebrates in the phylogenetic tree. The mRNA transcripts of CgAP-1 gene were detected in all tested tissues with highest expression level in hemocytes, especially in granulocytes. The mRNA expression level of CgAP-1 gene in hemocytes was significantly up-regulated (8.53-fold of that in PBS group, p < 0.01) at 6 h after LPS stimulation. CgAP-1 protein could be translocated into the nucleus of oyster hemocytes after LPS stimulation. The mRNA transcripts of interleukin17s (CgIL17-4 and CgIL17-5) in the hemocytes of CgAP-1-RNAi oysters decreased significantly at 24 h after LPS stimulation, which were 0.37-fold (p < 0.05) and 0.17-fold (p < 0.01) compared with that in EGFP-RNAi oysters, respectively. The results suggested that CgAP-1 played an important role in the immune response of oyster by regulating the expression of CgIL17s.
Collapse
Affiliation(s)
- Liyan Wang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Jiejie Sun
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian, 116023, China.
| | - Zhaojun Wu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Xingye Lian
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Shuo Han
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Shu Huang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Chuanyan Yang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Lingling Wang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Laboratory of Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266235, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian, 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian, 116023, China
| | - Linsheng Song
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Laboratory of Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266235, China; Liaoning Key Laboratory of Marine Animal Immunology & Disease Control, Dalian Ocean University, Dalian, 116023, China.
| |
Collapse
|
11
|
Tong W, Chen X, Song X, Chen Y, Jia R, Zou Y, Li L, Yin L, He C, Liang X, Ye G, Lv C, Lin J, Yin Z. Resveratrol inhibits LPS-induced inflammation through suppressing the signaling cascades of TLR4-NF-κB/MAPKs/IRF3. Exp Ther Med 2019; 19:1824-1834. [PMID: 32104238 PMCID: PMC7027153 DOI: 10.3892/etm.2019.8396] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 10/23/2019] [Indexed: 12/13/2022] Open
Abstract
Resveratrol (Res) is a natural compound that possesses anti-inflammatory properties. However, the protective molecular mechanisms of Res against lipopolysaccharide (LPS)-induced inflammation have not been fully studied. In the present study, RAW264.7 cells were stimulated with LPS in the presence or absence of Res, and the subsequent modifications to the LPS-induced signaling pathways caused by Res treatment were examined. It was identified that Res decreased the mRNA levels of Toll-like receptor 4 (TLR4), myeloid differentiation primary response protein MyD88, TIR domain-containing adapter molecule 2, which suggested that Res may inhibit the activation of the TLR4 signaling pathway. It suppressed the expression levels of total and phosphorylated TLR4, NF-κB inhibitor, p38 mitogen-activated protein kinase (MAPK), c-Jun N-terminal kinase, extracellular signal-regulated kinase 1/2 and interferon (IFN) regulatory factor 3 (IRF3) proteins. Following treatment with Res or specific inhibitors, the production of pro-inflammatory mediators including tumor necrosis factor-α, interleukin (IL)-6, IL-8 and IFN-β were decreased and the expression of anti-inflammatory mediator IL-10 was increased. These results suggested that Res may inhibit the signaling cascades of NF-κB, MAPKs and IRF3, which modulate pro-inflammatory cytokines. In conclusion, Res exhibited a therapeutic effect on LPS-induced inflammation through suppression of the TLR4-NF-κB/MAPKs/IRF3 signaling cascades.
Collapse
Affiliation(s)
- Wenzhi Tong
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Xiangxiu Chen
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Xu Song
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Yaqin Chen
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Renyong Jia
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Yuanfeng Zou
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Lixia Li
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Lizi Yin
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Changliang He
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Xiaoxia Liang
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Gang Ye
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Cheng Lv
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Juchun Lin
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| | - Zhongqiong Yin
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, P.R. China
| |
Collapse
|
12
|
An Y, Ni Y, Xu Z, Shi S, He J, Liu Y, Deng KY, Fu M, Jiang M, Xin HB. TRIM59 expression is regulated by Sp1 and Nrf1 in LPS-activated macrophages through JNK signaling pathway. Cell Signal 2020; 67:109522. [PMID: 31883458 DOI: 10.1016/j.cellsig.2019.109522] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/23/2019] [Accepted: 12/23/2019] [Indexed: 12/19/2022]
Abstract
Activated macrophages play an important role in many inflammatory diseases including septic shock and atherosclerosis. TRIM59 has been showed to participate in many pathological processes, such as inflammation, cytotoxicity and tumorigenesis. However, the molecular mechanisms controlling its expression in activated macrophages are not fully understood. Here we report that TRIM59 expression is regulated by Sp1 and Nrf1 in LPS-activated macrophages. TRIM59 is highly expressed in macrophages, and markedly decreased by LPS stimuli in vivo and in vitro. TRIM59 promoter activity is also significantly suppressed by LPS and further analysis demonstrated that Sp1 and Nrf1 directly bound to the proximal promoter of TRIM59 gene. LPS treatment significantly decreased Sp1 expression, nuclear translocation and reduced its binding to the promoter, whereas increased Nrf1 expression, nuclear translocation and enhanced its binding to the promoter. Moreover, LPS-decreased TRIM59 expression was reversed by JNK inhibitor. Finally, TRIM59 level is significantly decreased during atherosclerosis progression. Taken together, our results demonstrated that TRIM59 expression was precisely regulated by Sp1 and Nrf1 in LPS-activated macrophages, which may be dependent on the activation of JNK signaling pathway and TRIM59 may be a potential therapeutic target for inflammatory diseases such as atherosclerosis.
Collapse
|
13
|
Liddle DM, Monk JM, Hutchinson AL, Ma DWL, Robinson LE. CD8 + T cell/adipocyte inflammatory cross talk and ensuing M1 macrophage polarization are reduced by fish-oil-derived n-3 polyunsaturated fatty acids, in part by a TNF-α-dependent mechanism. J Nutr Biochem 2019; 76:108243. [PMID: 31760229 DOI: 10.1016/j.jnutbio.2019.108243] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/15/2019] [Accepted: 09/10/2019] [Indexed: 12/25/2022]
Abstract
Obese visceral adipose tissue (AT) inflammation is driven by adipokine-mediated cross talk between CD8+ T cells and adipocytes, a process mitigated by long-chain (LC) n-3 polyunsaturated fatty acids (PUFA) but underlying mechanisms and ensuing effects on macrophage polarization status are unknown. Using an in vitro co-culture model that recapitulates the degree of CD8+ T cell infiltration reported in obese AT, 3T3-L1 adipocytes were co-cultured for 24 h with purified splenic CD8+ T cells from C57Bl/6 mice consuming either a 10% w/w safflower oil (control, CON) or 7% w/w safflower oil + 3% w/w fish oil (FO) diet for 4 weeks (n=8-10/diet). Co-cultured cells were in direct contact or in a contact-independent condition separated by a Transwell permeable membrane and stimulated with lipopolysaccharide (10 ng/ml) to mimic in vivo obese endotoxin levels. In contact-dependent co-cultures, FO reduced inflammatory (IL-6, TNFα, IFN-γ) and macrophage chemotactic (CCL2, CCL7, CCL3) mRNA expression and/or secreted protein, NF-κB p65 activation, ROS accumulation, NLRP3 inflammasome priming (Nlrp3, Il1β mRNA) and activation (caspase-1 activity) compared to CON (P<.05). The anti-inflammatory action of FO was reproduced by the addition of a TNF-α neutralizing antibody (1 μg/ml) to CON co-cultures (CON/anti-TNF-α), albeit to a lesser degree. Conditioned media from FO and CON/anti-TNF-α co-cultures, in turn, reduced RAW 264.7 macrophage mRNA expression of M1 polarization markers (iNos, Cd11c, Ccr2) and associated inflammatory cytokines (Il6, Tnfα, Il1β) compared to CON. These data suggest that inflammatory CD8+ T cell/adipocyte cross talk is partially attributable to TNF-α signaling, which can be mitigated by LC n-3 PUFA.
Collapse
Affiliation(s)
- Danyelle M Liddle
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada, N1G 2W1
| | - Jennifer M Monk
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada, N1G 2W1
| | - Amber L Hutchinson
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada, N1G 2W1
| | - David W L Ma
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada, N1G 2W1
| | - Lindsay E Robinson
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada, N1G 2W1.
| |
Collapse
|
14
|
Roedig H, Nastase MV, Frey H, Moreth K, Zeng-brouwers J, Poluzzi C, Hsieh LT, Brandts C, Fulda S, Wygrecka M, Schaefer L. Biglycan is a new high-affinity ligand for CD14 in macrophages. Matrix Biol 2019; 77:4-22. [DOI: 10.1016/j.matbio.2018.05.006] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 05/15/2018] [Accepted: 05/15/2018] [Indexed: 02/06/2023]
|
15
|
Lankadasari MB, Mukhopadhyay P, Mohammed S, Harikumar KB. TAMing pancreatic cancer: combat with a double edged sword. Mol Cancer 2019; 18:48. [PMID: 30925924 PMCID: PMC6441154 DOI: 10.1186/s12943-019-0966-6] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 02/21/2019] [Indexed: 12/11/2022] Open
Abstract
Among all the deadly cancers, pancreatic cancer ranks seventh in mortality. The absence of any grave symptoms coupled with the unavailability of early prognostic and diagnostic markers make the disease incurable in most of the cases. This leads to a late diagnosis, where the disease would have aggravated and thus, incurable. Only around 20% of the cases present the early disease diagnosis. Surgical resection is the prime option available for curative local disease but in the case of advanced cancer, chemotherapy is the standard treatment modality although the patients end up with drug resistance and severe side effects. Desmoplasia plays a very important role in chemoresistance associated with pancreatic cancer and consists of a thick scar tissue around the tumor comprised of different cell populations. The interplay between this heterogenous population in the tumor microenvironment results in sustained tumor growth and metastasis. Accumulating evidences expose the crucial role played by the tumor-associated macrophages in pancreatic cancer and this review briefly presents the origin from their parent lineage and the importance in maintaining tumor hallmarks. Finally we have tried to address their role in imparting chemoresistance and the therapeutic interventions leading to reduced tumor burden.
Collapse
Affiliation(s)
- Manendra Babu Lankadasari
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, Kerala State, 695014, India.,Manipal Academy of Higher Education (MAHE), Manipal, India
| | - Pramiti Mukhopadhyay
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, Kerala State, 695014, India.,Present address: Graduate School of Biomedical Sciences, University of Texas Health Science Center, San Antonio, TX, 78229, USA
| | - Sabira Mohammed
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, Kerala State, 695014, India.,Manipal Academy of Higher Education (MAHE), Manipal, India
| | - Kuzhuvelil B Harikumar
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, Kerala State, 695014, India.
| |
Collapse
|
16
|
Affiliation(s)
- Teminioluwa A Ajayi
- School of Medicine, Duke University, Durham, North Carolina, United States of America
| | - Sarah Cantrell
- School of Medicine, Duke University, Durham, North Carolina, United States of America
| | - Ashley Spann
- Department of Medicine, Duke University, Durham, North Carolina, United States of America
| | - Katherine S Garman
- Division of Gastroenterology, Department of Medicine, Duke University, Durham, North Carolina, United States of America.,Durham Veterans Affairs Health Care System, Durham, North Carolina, United States of America
| |
Collapse
|
17
|
Smith M, García-Martínez E, Pitter MR, Fucikova J, Spisek R, Zitvogel L, Kroemer G, Galluzzi L. Trial Watch: Toll-like receptor agonists in cancer immunotherapy. Oncoimmunology 2018; 7:e1526250. [PMID: 30524908 DOI: 10.1080/2162402x.2018.1526250] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Indexed: 12/14/2022] Open
Abstract
Toll-like receptor (TLR) agonists demonstrate therapeutic promise as immunological adjuvants for anticancer immunotherapy. To date, three TLR agonists have been approved by US regulatory agencies for use in cancer patients. Additionally, the potential of hitherto experimental TLR ligands to mediate clinically useful immunostimulatory effects has been extensively investigated over the past few years. Here, we summarize recent preclinical and clinical advances in the development of TLR agonists for cancer therapy.
Collapse
Affiliation(s)
- Melody Smith
- Department of Medicine and Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Elena García-Martínez
- Hematology and Oncology Department, Hospital Universitario Morales Meseguer, Murcia, Spain
| | - Michael R Pitter
- Department of Medicine and Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Jitka Fucikova
- Sotio a.c., Prague, Czech Republic.,Department of Immunology, 2nd Faculty of Medicine, University Hospital Motol, Charles University, Prague, Czech Republic
| | - Radek Spisek
- Sotio a.c., Prague, Czech Republic.,Department of Immunology, 2nd Faculty of Medicine, University Hospital Motol, Charles University, Prague, Czech Republic
| | - Laurence Zitvogel
- INSERM, U1015, Villejuif, France.,Gustave Roussy Comprehensive Cancer Institute, Villejuif, France.,Center of Clinical Investigations in Biotherapies of Cancer (CICBT) 1428, Villejuif, France.,Université Paris Sud/Paris XI, Le Kremlin-Bicêtre, France
| | - Guido Kroemer
- Université Paris Descartes/ Paris V, Paris, France.,Université Pierre et Marie Curie/Paris VI, Paris, France.,INSERM, U1138, Paris, France.,Equipe 11 labellisée Ligue contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Comprehensive Cancer Institute, Villejuif, France.,Karolinska Institute, Department of Women's and Children's Health, Karolinska University Hospital, Stockholm, Sweden.,Pôle de Biologie, Hopitâl Européen George Pompidou, AP-HP; Paris, France
| | - Lorenzo Galluzzi
- Université Paris Descartes/ Paris V, Paris, France.,Department of Radiation Oncology, Weill Cornell Medical College, New York, NY, USA.,Sandra and Edward Meyer Cancer Center, New York, NY, USA
| |
Collapse
|
18
|
Liddle DM, Hutchinson AL, Wellings HR, Power KA, Robinson LE, Monk JM. Integrated Immunomodulatory Mechanisms through which Long-Chain n-3 Polyunsaturated Fatty Acids Attenuate Obese Adipose Tissue Dysfunction. Nutrients 2017; 9:E1289. [PMID: 29186929 DOI: 10.3390/nu9121289] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/14/2017] [Accepted: 11/16/2017] [Indexed: 12/13/2022] Open
Abstract
Obesity is a global health concern with rising prevalence that increases the risk of developing other chronic diseases. A causal link connecting overnutrition, the development of obesity and obesity-associated co-morbidities is visceral adipose tissue (AT) dysfunction, characterized by changes in the cellularity of various immune cell populations, altered production of inflammatory adipokines that sustain a chronic state of low-grade inflammation and, ultimately, dysregulated AT metabolic function. Therefore, dietary intervention strategies aimed to halt the progression of obese AT dysfunction through any of the aforementioned processes represent an important active area of research. In this connection, fish oil-derived dietary long-chain n-3 polyunsaturated fatty acids (PUFA) in the form of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) have been demonstrated to attenuate obese AT dysfunction through multiple mechanisms, ultimately affecting AT immune cellularity and function, adipokine production, and metabolic signaling pathways, all of which will be discussed herein.
Collapse
|
19
|
Wu C, Liu C, Luo K, Li Y, Jiang J, Yan F. Changes in Expression of the Membrane Receptors CD14, MHC-II, SR-A, and TLR4 in Tissue-Specific Monocytes/Macrophages Following Porphyromonas gingivalis–LPS Stimulation. Inflammation 2017; 41:418-431. [DOI: 10.1007/s10753-017-0698-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
20
|
Abstract
The development of therapeutic approaches aimed at reducing inflammation, improving lipid metabolism, and preventing nonalcoholic fatty liver disease holds significant potential in the management of obesity-associated disease. In this review, the recent basic science and clinical research examining dietary sphingolipid intake and the prevention of dyslipidemia and nonalcoholic fatty liver disease is summarized. Dietary sphingolipids have been shown to dose-dependently reduce the acute intestinal absorption of cholesterol, triglycerides, and fatty acids in rodents. Overall, studies feeding dietary sphingolipids to rodents typically show reductions in serum lipids. Furthermore, these hypolipidemic effects are also observed in most human studies, although the magnitude of such effects is typically smaller. Dietary sphingolipids also appear useful in preventing hepatic lipid uptake and accumulation and have shown benefits in preventing hepatic steatosis in rodent models. Dietary sphingolipids may affect the gut-liver axis by preventing the translocation of gut bacteria-derived lipopolysaccharide and/or inhibiting its proinflammatory effects. Current evidence from preclinical studies indicates that dietary sphingolipids have lipid-lowering and anti-inflammatory properties, although their potential to prevent human chronic disease has not been fully explored. It will be important to determine if such effects seen in cell and animal models translate to humans. More research is warranted to define how dietary sphingolipids influence lipid metabolism and inflammation.
Collapse
Affiliation(s)
- Gregory H Norris
- G.H. Norris and C.N. Blesso are with the Department of Nutritional Sciences, University of Connecticut, Storrs, Connecticut, USA
| | - Christopher N Blesso
- G.H. Norris and C.N. Blesso are with the Department of Nutritional Sciences, University of Connecticut, Storrs, Connecticut, USA
| |
Collapse
|
21
|
Cochet F, Peri F. The Role of Carbohydrates in the Lipopolysaccharide (LPS)/Toll-Like Receptor 4 (TLR4) Signalling. Int J Mol Sci 2017; 18:E2318. [PMID: 29099761 DOI: 10.3390/ijms18112318] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 09/27/2017] [Accepted: 10/30/2017] [Indexed: 12/12/2022] Open
Abstract
The interactions between sugar-containing molecules from the bacteria cell wall and pattern recognition receptors (PRR) on the plasma membrane or cytosol of specialized host cells are the first molecular events required for the activation of higher animal’s immune response and inflammation. This review focuses on the role of carbohydrates of bacterial endotoxin (lipopolysaccharide, LPS, lipooligosaccharide, LOS, and lipid A), in the interaction with the host Toll-like receptor 4/myeloid differentiation factor 2 (TLR4/MD-2) complex. The lipid chains and the phosphorylated disaccharide core of lipid A moiety are responsible for the TLR4 agonist action of LPS, and the specific interaction between MD-2, TLR4, and lipid A are key to the formation of the activated complex (TLR4/MD-2/LPS)2, which starts intracellular signalling leading to nuclear factors activation and to production of inflammatory cytokines. Subtle chemical variations in the lipid and sugar parts of lipid A cause dramatic changes in endotoxin activity and are also responsible for the switch from TLR4 agonism to antagonism. While the lipid A pharmacophore has been studied in detail and its structure-activity relationship is known, the contribution of core saccharides 3-deoxy-d-manno-octulosonic acid (Kdo) and heptosyl-2-keto-3-deoxy-octulosonate (Hep) to TLR4/MD-2 binding and activation by LPS and LOS has been investigated less extensively. This review focuses on the role of lipid A, but also of Kdo and Hep sugars in LPS/TLR4 signalling.
Collapse
|
22
|
Liu W, Zhu H, Fang H. Propofol Potentiates Sevoflurane-Induced Inhibition of Nuclear Factor--κB-Mediated Inflammatory Responses and Regulation of Mitogen-Activated Protein Kinases Pathways via Toll-like Receptor 4 Signaling in Lipopolysaccharide-Induced Acute Lung Injury in Mice. Am J Med Sci 2017; 354:493-505. [DOI: 10.1016/j.amjms.2017.06.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 06/01/2017] [Accepted: 06/19/2017] [Indexed: 12/24/2022]
|
23
|
Bhutia YD, Ogura J, Sivaprakasam S, Ganapathy V. Gut Microbiome and Colon Cancer: Role of Bacterial Metabolites and Their Molecular Targets in the Host. Curr Colorectal Cancer Rep 2017; 13:111-118. [PMID: 30337849 DOI: 10.1007/s11888-017-0362-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Purpose of review The relationship between colonic bacteria and the host is symbiotic, but how communication between the two partners occurs is just beginning to be understood at the molecular level. Here, we highlight specific products of bacterial metabolism that are present in the colonic lumen and their molecular targets in the host that facilitate this communication. Recent findings Colonic epithelial cells and mucosal immune cells express several cell-surface receptors and nuclear receptors that are activated by specific bacterial metabolites, which impact multiple signaling pathways and expression of many genes. In addition, some bacterial metabolites also possess the ability to cause epigenetic changes in these cells via inhibition of selective enzymes involved in the maintenance of histone acetylation and DNA methylation patterns. Summary Colonic bacteria communicate with their host with selective metabolites that interact with host molecular targets. This chemical communication underlies a broad range of the biology and function of colonic epithelial cells and mucosal immune cells, which protect against inflammation and carcinogenesis in the colon under normal physiological conditions.
Collapse
Affiliation(s)
- Yangzom D Bhutia
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA, Tel.: 806-743-1282
| | - Jiro Ogura
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA, Tel.: 806-743-4101
| | - Sathish Sivaprakasam
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA, Tel.: 806-743-4117
| | - Vadivel Ganapathy
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| |
Collapse
|
24
|
Liu Q, Hu Y, Cao Y, Song G, Liu Z, Liu X. Chicoric Acid Ameliorates Lipopolysaccharide-Induced Oxidative Stress via Promoting the Keap1/Nrf2 Transcriptional Signaling Pathway in BV-2 Microglial Cells and Mouse Brain. J Agric Food Chem 2017; 65:338-347. [PMID: 28002939 DOI: 10.1021/acs.jafc.6b04873] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
As a major nutraceutical component of a typical Mediterranean vegetable chicory, chicoric acid (CA) has been well-documented due to its excellent antioxidant and antiobesity bioactivities. In the current study, the effects of CA on lipopolysaccharide (LPS)-stimulated oxidative stress in BV-2 microglia and C57BL/6J mice and the underlying molecular mechanisms were investigated. Results demonstrated that CA significantly reversed LPS-elicited cell viability decrease, mitochondrial dysfunction, activation of NFκB and MAPK stress pathways, and inflammation responses via balancing cellular redox status. Furthermore, molecular modeling study demonstrated that CA could insert into the pocket of Keap1 and up-regulated Nrf2 signaling and, thus, transcriptionally regulate downstream expressions of antioxidant enzymes including HO-1 and NQO-1 in both microglial cells and ip injection of LPS-treated mouse brain. These results suggested that CA attenuated LPS-induced oxidative stress via mediating Keap1/Nrf2 transcriptional pathways and downstream enzyme expressions, which indicated that CA has great potential as a nutritional preventive strategy in oxidative stress-related neuroinflammation.
Collapse
Affiliation(s)
- Qian Liu
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| | - Yaya Hu
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| | - Youfang Cao
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| | - Ge Song
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| | - Zhigang Liu
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| | - Xuebo Liu
- Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University , Yangling, China
| |
Collapse
|
25
|
Sanui T, Takeshita M, Fukuda T, Haraguchi A, Aida Y, Nishimura F. Anti-CD14 Antibody-treated Neutrophils Respond to LPS: Possible Involvement of CD14 Upregulated by Anti-CD14 Antibody Binding. Immunol Invest 2016; 46:190-200. [DOI: 10.1080/08820139.2016.1238925] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Terukazu Sanui
- Section of Periodontology, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Masaaki Takeshita
- Section of Periodontology, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Takao Fukuda
- Section of Periodontology, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Akira Haraguchi
- Division of General Dentistry, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Yoshitomi Aida
- Section of Periodontology, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Fusanori Nishimura
- Section of Periodontology, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| |
Collapse
|
26
|
Van Hove I, Lefevere E, De Groef L, Sergeys J, Salinas-Navarro M, Libert C, Vandenbroucke R, Moons L. MMP-3 Deficiency Alleviates Endotoxin-Induced Acute Inflammation in the Posterior Eye Segment. Int J Mol Sci 2016; 17:ijms17111825. [PMID: 27809288 PMCID: PMC5133826 DOI: 10.3390/ijms17111825] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 10/20/2016] [Accepted: 10/25/2016] [Indexed: 01/04/2023] Open
Abstract
Matrix metalloproteinase-3 (MMP-3) is known to mediate neuroinflammatory processes by activating microglia, disrupting blood-central nervous system barriers and supporting neutrophil influx into the brain. In addition, the posterior part of the eye, more specifically the retina, the retinal pigment epithelium (RPE) and the blood-retinal barrier, is affected upon neuroinflammation, but a role for MMP-3 during ocular inflammation remains elusive. We investigated whether MMP-3 contributes to acute inflammation in the eye using the endotoxin-induced uveitis (EIU) model. Systemic administration of lipopolysaccharide induced an increase in MMP-3 mRNA and protein expression level in the posterior part of the eye. MMP-3 deficiency or knockdown suppressed retinal leukocyte adhesion and leukocyte infiltration into the vitreous cavity in mice subjected to EIU. Moreover, retinal and RPE mRNA levels of intercellular adhesion molecule 1 (Icam1), interleukin 6 (Il6), cytokine-inducible nitrogen oxide synthase (Nos2) and tumor necrosis factor α (Tnfα), which are key molecules involved in EIU, were clearly reduced in MMP-3 deficient mice. In addition, loss of MMP-3 repressed the upregulation of the chemokines monocyte chemoattractant protein (MCP)-1 and (C-X-C motif) ligand 1 (CXCL1). These findings suggest a contribution of MMP-3 during EIU, and its potential use as a therapeutic drug target in reducing ocular inflammation.
Collapse
Affiliation(s)
- Inge Van Hove
- Neural Circuit Development and Regeneration Research Group, Department of Biology, Katholieke Universiteit Leuven (KU Leuven), B-3000 Leuven, Belgium.
- Laboratory of Experimental Ophthalmology, Department of Neurosciences, KU Leuven, B-3000 Leuven, Belgium.
| | - Evy Lefevere
- Neural Circuit Development and Regeneration Research Group, Department of Biology, Katholieke Universiteit Leuven (KU Leuven), B-3000 Leuven, Belgium.
- Laboratory of Experimental Ophthalmology, Department of Neurosciences, KU Leuven, B-3000 Leuven, Belgium.
| | - Lies De Groef
- Neural Circuit Development and Regeneration Research Group, Department of Biology, Katholieke Universiteit Leuven (KU Leuven), B-3000 Leuven, Belgium.
- Laboratory of Experimental Ophthalmology, Department of Neurosciences, KU Leuven, B-3000 Leuven, Belgium.
| | - Jurgen Sergeys
- Neural Circuit Development and Regeneration Research Group, Department of Biology, Katholieke Universiteit Leuven (KU Leuven), B-3000 Leuven, Belgium.
- Laboratory of Experimental Ophthalmology, Department of Neurosciences, KU Leuven, B-3000 Leuven, Belgium.
| | - Manuel Salinas-Navarro
- Neural Circuit Development and Regeneration Research Group, Department of Biology, Katholieke Universiteit Leuven (KU Leuven), B-3000 Leuven, Belgium.
| | - Claude Libert
- Inflammation Research Center, VIB, B-9052 Ghent, Belgium.
- Department of Biomedical Molecular Biology, Ghent University, B-9052 Ghent, Belgium.
| | - Roosmarijn Vandenbroucke
- Inflammation Research Center, VIB, B-9052 Ghent, Belgium.
- Department of Biomedical Molecular Biology, Ghent University, B-9052 Ghent, Belgium.
| | - Lieve Moons
- Neural Circuit Development and Regeneration Research Group, Department of Biology, Katholieke Universiteit Leuven (KU Leuven), B-3000 Leuven, Belgium.
| |
Collapse
|
27
|
Cooke KR, Olkiewicz K, Erickson N, Ferrara JL. The role of endotoxin and the innate immune response in the pathophysiology of acute graft versus host disease. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/09680519020080061301] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Allogeneic stem cell transplantation (SCT) is an important therapy for a number of malignant diseases, and acute graft versus host disease (GVHD) and leukemic relapse remain the two major obstacles to successful outcomes of this treatment strategy. The therapeutic potential of allogeneic SCT relies on the graft versus leukemia (GVL) effect, during which donor T lymphocytes eradicate residual malignant cells via immunological mechanisms. Unfortunately, beneficial GVL effects are closely associated with the toxicity of GVHD. The pathophysiology of GVHD is complex and fundamentally depends upon aspects of adaptive immunity and interactions between donor T cells and foreign host tissue antigens. Recent work has revealed that components of the innate immune response and the secretion of inflammatory cytokine effectors are also important. In this context, experimental studies have demonstrated that loss of gastrointestinal (GI) tract integrity plays a major role in the amplification of systemic GVHD. Specifically, translocation of endotoxin across a damaged GI tract and into the circulation promotes local and systemic cytokine release. This effect perpetuates further gut mucosal injury and endotoxin leak, thus establishing a positive feedback loop for progressive target organ injury and systemic inflammation. Data obtained using murine SCT models have shown that disruption of the cellular activating effects of lipopolysaccharide (LPS) significantly reduces cytokine secretion and GVHD severity without altering T-cell responses to host antigens. These findings support a critical role for LPS in the early inflammatory events responsible for GVHD and suggest that strategies which target the innate immune response and LPS receptor-ligand interactions may help prevent GVHD while preserving donor T-cell responses and GVL activity.
Collapse
Affiliation(s)
- Kenneth R. Cooke
- Department of Pediatrics, University of Michigan Cancer Center, Ann Arbor, Michigan, USA,
| | - Krystyna Olkiewicz
- Department of Pediatrics, University of Michigan Cancer Center, Ann Arbor, Michigan, USA
| | - Nicole Erickson
- Department of Pediatrics, University of Michigan Cancer Center, Ann Arbor, Michigan, USA
| | - James L.M. Ferrara
- Department of Pediatrics, University of Michigan Cancer Center, Ann Arbor, Michigan, USA, Department of Internal Medicine, Division of Hematology/Oncology, Blood and Marrow Transplantation Program, University of Michigan Cancer Center, Ann Arbor, Michigan, USA
| |
Collapse
|
28
|
Snider EJ, Freedberg DE, Abrams JA. Potential Role of the Microbiome in Barrett's Esophagus and Esophageal Adenocarcinoma. Dig Dis Sci 2016; 61:2217-2225. [PMID: 27068172 PMCID: PMC4945493 DOI: 10.1007/s10620-016-4155-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 04/02/2016] [Indexed: 12/13/2022]
Abstract
Esophageal adenocarcinoma and its precursor Barrett's esophagus have been rapidly increasing in incidence for half a century, for reasons not adequately explained by currently identified risk factors such as gastroesophageal reflux disease and obesity. The upper gastrointestinal microbiome may represent another potential cofactor. The distal esophagus has a distinct microbiome of predominantly oral-derived flora, which is altered in Barrett's esophagus and reflux esophagitis. Chronic low-grade inflammation or direct carcinogenesis from this altered microbiome may combine with known risk factors to promote Barrett's metaplasia and progression to adenocarcinoma.
Collapse
Affiliation(s)
- Erik J. Snider
- Columbia University College of Physicians and Surgeons, New York, New York
| | | | - Julian A. Abrams
- Columbia University College of Physicians and Surgeons, New York, New York
| |
Collapse
|
29
|
Rider D, Furusho H, Xu S, Trachtenberg AJ, Kuo WP, Hirai K, Susa M, Bahammam L, Stashenko P, Fujimura A, Sasaki H. Elevated CD14 (Cluster of Differentiation 14) and Toll-Like Receptor (TLR) 4 Signaling Deteriorate Periapical Inflammation in TLR2 Deficient Mice. Anat Rec (Hoboken) 2016; 299:1281-92. [PMID: 27314637 DOI: 10.1002/ar.23383] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 04/21/2016] [Indexed: 02/02/2023]
Abstract
Apical periodontitis (periapical lesions) is an infection-induced chronic inflammation in the jaw, ultimately resulting in the destruction of apical periodontal tissue. Toll-like receptors (TLRs) are prominent in the initial recognition of pathogens. Our previous study showed that TLR4 signaling is proinflammatory in periapical lesions induced by a polymicrobial endodontic infection. In contrast, the functional role of TLR2 in regulation of periapical tissue destruction is still not fully understood. Using TLR2 deficient (KO), TLR2/TLR4 double deficient (dKO), and wild-type (WT) mice, we demonstrate that TLR2 KO mice are highly responsive to polymicrobial infection-induced periapical lesion caused by over activation of TLR4 signal transduction pathway that resulted in elevation of NF-kB (nuclear factor kappa B) and proinflammatory cytokine production. The altered TLR4 signaling is caused by TLR2 deficiency-dependent elevation of CD14 (cluster of differentiation 14), which is a co-receptor of TLR4. Indeed, neutralization of CD14 strikingly suppresses TLR2 deficiency-dependent inflammation and tissue destruction in vitro and in vivo. Our findings suggest that a network of TLR2, TLR4, and CD14 is a key factor in regulation of polymicrobial dentoalveolar infection and subsequent tissue destruction. Anat Rec, 299:1281-1292, 2016. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Daniel Rider
- Department of Immunology and Infectious Diseases, the Forsyth Institute, Cambridge, Massachusetts
| | - Hisako Furusho
- Department of Oral and Maxillofacial Pathobiology, Hiroshima University, Japan
| | - Shuang Xu
- Department of Immunology and Infectious Diseases, the Forsyth Institute, Cambridge, Massachusetts
| | | | - Winston Patrick Kuo
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, Massachusetts
| | - Kimito Hirai
- Department of Immunology and Infectious Diseases, the Forsyth Institute, Cambridge, Massachusetts
| | - Mako Susa
- Department of Periodontology and Endodontology, Graduate School of Dentistry, Tohoku University, Sendai, Miyagi, Japan
| | - Laila Bahammam
- Department of Endodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Philip Stashenko
- Department of Immunology and Infectious Diseases, the Forsyth Institute, Cambridge, Massachusetts.,Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts
| | - Akira Fujimura
- Division of Functional Morphology, Department of Anatomy, Iwate Medical University, Morioka, Iwate, 020-8505, Japan
| | - Hajime Sasaki
- Department of Immunology and Infectious Diseases, the Forsyth Institute, Cambridge, Massachusetts.,Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts
| |
Collapse
|
30
|
Kuo WT, Lee TC, Yu LCH. Eritoran Suppresses Colon Cancer by Altering a Functional Balance in Toll-like Receptors That Bind Lipopolysaccharide. Cancer Res 2016; 76:4684-95. [PMID: 27328732 DOI: 10.1158/0008-5472.can-16-0172] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 06/05/2016] [Indexed: 11/16/2022]
Abstract
Colorectal carcinogenesis is affected by overexpression of the lipopolysaccharide (LPS) receptors CD14 and TLR4, which antagonize each other by affecting epithelial cell proliferation and apoptosis. Eritoran is an investigational drug for sepsis treatment that resembles the lipid A moiety of LPS and therefore acts as a TLR4 inhibitor. In the present study, we explored the potential therapeutic uses and mechanisms of action of eritoran in reducing colon cancer progression. Eritoran administration via intracolonic, intragastric, or intravenous routes significantly reduced tumor burden in a chemically induced mouse model of colorectal carcinoma. Decreased proliferation and increased apoptosis were observed in mouse tumor cells after eritoran treatment. In vitro cultures of mouse primary tumor spheroids and human cancer cell lines displayed increased cell proliferation and cell-cycle progression following LPS challenge. This effect was inhibited by eritoran and by silencing CD14 or TLR4. In contrast, apoptosis induced by eritoran was eliminated by silencing CD14 or protein kinase Cζ (PKCζ) but not TLR4. Lastly, LPS and eritoran caused hyperphosphorylation of PKCζ in a CD14-dependent and TLR4-independent manner. Blocking PKCζ activation by a Src kinase inhibitor and a PKCζ-pseudosubstrate prevented eritoran-induced apoptosis. In summary, our work offers a preclinical proof of concept for the exploration of eritoran as a clinical treatment, with a mechanistic rationale to reposition this drug to improve the management of colorectal cancer. Cancer Res; 76(16); 4684-95. ©2016 AACR.
Collapse
Affiliation(s)
- Wei-Ting Kuo
- Graduate Institute of Physiology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Tsung-Chun Lee
- Graduate Institute of Physiology, National Taiwan University College of Medicine, Taipei, Taiwan. Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Linda Chia-Hui Yu
- Graduate Institute of Physiology, National Taiwan University College of Medicine, Taipei, Taiwan.
| |
Collapse
|
31
|
Monk JM, Liddle DM, Cohen DJ, Tsang DH, Hillyer LM, Abdelmagid SA, Nakamura MT, Power KA, Ma DW, Robinson LE. The delta 6 desaturase knock out mouse reveals that immunomodulatory effects of essential n-6 and n-3 polyunsaturated fatty acids are both independent of and dependent upon conversion. J Nutr Biochem 2016; 32:29-38. [DOI: 10.1016/j.jnutbio.2016.01.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 12/14/2015] [Accepted: 01/21/2016] [Indexed: 12/30/2022]
|
32
|
Wang Y, Su L, Morin MD, Jones BT, Whitby LR, Surakattula MM, Huang H, Shi H, Choi JH, Wang KW, Moresco EM, Berger M, Zhan X, Zhang H, Boger DL, Beutler B. TLR4/MD-2 activation by a synthetic agonist with no similarity to LPS. Proc Natl Acad Sci U S A 2016; 113:E884-93. [PMID: 26831104 DOI: 10.1073/pnas.1525639113] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Structurally disparate molecules reportedly engage and activate Toll-like receptor (TLR) 4 and other TLRs, yet the interactions that mediate binding and activation by dissimilar ligands remain unknown. We describe Neoseptins, chemically synthesized peptidomimetics that bear no structural similarity to the established TLR4 ligand, lipopolysaccharide (LPS), but productively engage the mouse TLR4 (mTLR4)/myeloid differentiation factor 2 (MD-2) complex. Neoseptin-3 activates mTLR4/MD-2 independently of CD14 and triggers canonical myeloid differentiation primary response gene 88 (MyD88)- and Toll-interleukin 1 receptor (TIR) domain-containing adaptor inducing IFN-beta (TRIF)-dependent signaling. The crystal structure mTLR4/MD-2/Neoseptin-3 at 2.57-Å resolution reveals that Neoseptin-3 binds as an asymmetrical dimer within the hydrophobic pocket of MD-2, inducing an active receptor complex similar to that induced by lipid A. However, Neoseptin-3 and lipid A form dissimilar molecular contacts to achieve receptor activation; hence strong TLR4/MD-2 agonists need not mimic LPS.
Collapse
|
33
|
Kim TW, Lee SJ, Oh BM, Lee H, Uhm TG, Min JK, Park YJ, Yoon SR, Kim BY, Kim JW, Choe YK, Lee HG. Epigenetic modification of TLR4 promotes activation of NF-κB by regulating methyl-CpG-binding domain protein 2 and Sp1 in gastric cancer. Oncotarget 2016; 7:4195-209. [PMID: 26675260 PMCID: PMC4826199 DOI: 10.18632/oncotarget.6549] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 11/23/2015] [Indexed: 12/17/2022] Open
Abstract
Toll-like receptor 4 (TLR4) is important in promoting the immune response in various cancers. Recently, TLR4 is highly expressed in a stage-dependent manner in gastric cancer, but the regulatory mechanism of TLR4 expression has been not elucidated it. Here, we investigated the mechanism underlying regulation of TLR4 expression through promoter methylation and histone modification between transcriptional regulation and silencing of the TLR4 gene in gastric cancer cells. Chromatin immunoprecipitation was carried out to screen for factors related to TLR4 methylation such as MeCP2, HDAC1, and Sp1 on the TLR4 promoter. Moreover, DNA methyltransferase inhibitor 5-aza-deoxycytidine (5-aza-dC) induced demethylation of the TLR4 promoter and increased H3K4 trimethylation and Sp1 binding to reactivate silenced TLR4. In contrast, although the silence of TLR4 activated H3K9 trimethylation and MeCP2 complex, combined treatment with TLR4 agonist and 5-aza-dC upregulated H3K4 trimethylation and activated with transcription factors as Sp1 and NF-κB. This study demonstrates that recruitment of the MeCP2/HDAC1 repressor complex increases the low levels of TLR4 expression through epigenetic modification of DNA and histones on the TLR4 promoter, but Sp1 activates TLR4 high expression by hypomethylation and NF-κB signaling in gastric cancer cells.
Collapse
Affiliation(s)
- Tae Woo Kim
- Genome Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Republic of Korea
- Department of Biomolecular Science, University of Science and Technology (UST), Yuseong-gu, Daejeon, Republic of Korea
| | - Seon-Jin Lee
- Genome Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Republic of Korea
- Department of Biomolecular Science, University of Science and Technology (UST), Yuseong-gu, Daejeon, Republic of Korea
| | - Byung Moo Oh
- Genome Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Republic of Korea
- Department of Biomolecular Science, University of Science and Technology (UST), Yuseong-gu, Daejeon, Republic of Korea
| | - Heesoo Lee
- Genome Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Republic of Korea
- Department of Biomolecular Science, University of Science and Technology (UST), Yuseong-gu, Daejeon, Republic of Korea
| | - Tae Gi Uhm
- Genome Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Republic of Korea
| | - Jeong-Ki Min
- Functional Genomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Republic of Korea
| | - Young-Jun Park
- Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Republic of Korea
| | - Suk Ran Yoon
- Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Republic of Korea
| | - Bo-Yeon Kim
- World Class Institute, Korea Research Institute of Bioscience and Biotechnology, Ochang, Cheongwon, Republic of Korea
| | - Jong Wan Kim
- Department of Laboratory Medicine, College of Medicine, Dankook University, Cheonan, Chungnam, Republic of Korea
| | - Yong-Kyung Choe
- Genome Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Republic of Korea
| | - Hee Gu Lee
- Genome Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Republic of Korea
- Department of Biomolecular Science, University of Science and Technology (UST), Yuseong-gu, Daejeon, Republic of Korea
| |
Collapse
|
34
|
Monk JM, Liddle DM, Brown MJ, Zarepoor L, De Boer AA, Ma DWL, Power KA, Robinson LE. Anti-inflammatory and anti-chemotactic effects of dietary flaxseed oil on CD8+
T cell/adipocyte-mediated cross-talk. Mol Nutr Food Res 2015; 60:621-30. [DOI: 10.1002/mnfr.201500541] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 09/28/2015] [Accepted: 10/15/2015] [Indexed: 01/11/2023]
Affiliation(s)
- Jennifer M. Monk
- Department of Human Health and Nutritional Sciences; University of Guelph; Guelph ON Canada
- Guelph Food Research Centre; Agriculture Agri-Food Canada; Guelph ON Canada
| | - Danyelle M. Liddle
- Department of Human Health and Nutritional Sciences; University of Guelph; Guelph ON Canada
| | - Morgan J. Brown
- Department of Human Health and Nutritional Sciences; University of Guelph; Guelph ON Canada
| | - Leila Zarepoor
- Department of Human Health and Nutritional Sciences; University of Guelph; Guelph ON Canada
- Guelph Food Research Centre; Agriculture Agri-Food Canada; Guelph ON Canada
| | - Anna A. De Boer
- Department of Human Health and Nutritional Sciences; University of Guelph; Guelph ON Canada
| | - David W. L. Ma
- Department of Human Health and Nutritional Sciences; University of Guelph; Guelph ON Canada
| | - Krista A. Power
- Department of Human Health and Nutritional Sciences; University of Guelph; Guelph ON Canada
- Guelph Food Research Centre; Agriculture Agri-Food Canada; Guelph ON Canada
| | - Lindsay E. Robinson
- Department of Human Health and Nutritional Sciences; University of Guelph; Guelph ON Canada
| |
Collapse
|
35
|
de Courten B, Moreno-Navarrete JM, Lyons J, Soldatos G, de Courten M, Dougherty S, Forbes J, Fernández-Real JM. Contrasting association of circulating sCD14 with insulin sensitivity in non-obese and morbidly obese subjects. Mol Nutr Food Res 2015; 60:103-9. [PMID: 26114238 DOI: 10.1002/mnfr.201500102] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 05/21/2015] [Accepted: 05/26/2015] [Indexed: 01/22/2023]
Abstract
SCOPE In experimental studies, moderate to high concentrations of sCD14 (serum cluster of differentiation 14 protein) prevent lipopolysaccharide (LPS)-induced systemic inflammation, while low concentrations may promote inflammation. Given that metabolic endotoxemia is thought to initiate high-fat diet-induced insulin resistance, we explored the association between sCD14 concentrations and insulin sensitivity in humans. METHODS AND RESULTS Healthy non-obese (n = 12, BMI 26 ± 5y), obese (n = 11, BMI 33.45 ± 3.2) and morbidly obese participants (n = 38, BMI 45 ± 7) underwent measurement of body composition (dual energy X-ray absorptiometry) and a hyperinsulinemic-euglycemic clamp to measure insulin sensitivity (M value). Circulating sCD14 concentrations were measured by ELISA. Non-obese participants had lower circulating sCD14 concentrations compared to obese (p = 0.03). Circulating sCD14 concentrations were positively associated with percent body fat, waist circumference and white blood cell count and negatively associated with insulin sensitivity. In contrast, circulating sCD14 were positively associated with insulin sensitivity in morbidly obese participants. In regression analysis, insulin sensitivity (r = 0.52, p = 0.004) and fasting triglycerides (r = 0.49, p = 0.005) contributed independently to circulating sCD14 variance after controlling for age, sex and BMI in these morbidly obese subjects. CONCLUSION These findings suggest that circulating sCD14 concentrations, through its compensatory (in non-obese subjects) or buffering role (in morbidly obese subjects), could exert an important role in modulating insulin sensitivity.
Collapse
Affiliation(s)
- Barbora de Courten
- Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Monash Centre for Health, Research and Implementation (MCHRI), School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - José Maria Moreno-Navarrete
- University Hospital of Girona, Institut d'Investigació Biomèdica de Girona (IDIBGi) and CIBERobn Pathophysiology of Obesity and Nutrition, Spain
| | - Jasmine Lyons
- Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Georgia Soldatos
- Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Monash Centre for Health, Research and Implementation (MCHRI), School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - Maximilian de Courten
- Centre for Chronic Disease, College of Health and Biomedicine, Victoria University, Melbourne, Australia
| | - Sonia Dougherty
- Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Josephine Forbes
- Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Centre for Chronic Disease, College of Health and Biomedicine, Victoria University, Melbourne, Australia.,Mater Research at TRI, Woolloongabba, Australia.,Mater Clinical School, University of Queensland, St Lucia, Australia
| | - José Manuel Fernández-Real
- University Hospital of Girona, Institut d'Investigació Biomèdica de Girona (IDIBGi) and CIBERobn Pathophysiology of Obesity and Nutrition, Spain
| |
Collapse
|
36
|
Woolbright BL, Jaeschke H. Xenobiotic and Endobiotic Mediated Interactions Between the Cytochrome P450 System and the Inflammatory Response in the Liver. Adv Pharmacol 2015; 74:131-61. [PMID: 26233906 DOI: 10.1016/bs.apha.2015.04.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The liver is a unique organ in the body as it has significant roles in both metabolism and innate immune clearance. Hepatocytes in the liver carry a nearly complete complement of drug metabolizing enzymes, including numerous cytochrome P450s. While a majority of these enzymes effectively detoxify xenobiotics, or metabolize endobiotics, a subportion of these reactions result in accumulation of metabolites that can cause either direct liver injury or indirect liver injury through activation of inflammation. The liver also contains multiple populations of innate immune cells including the resident macrophages (Kupffer cells), a relatively large number of natural killer cells, and blood-derived neutrophils. While these cells are primarily responsible for clearance of pathogens, activation of these immune cells can result in significant tissue injury during periods of inflammation. When activated chronically, these inflammatory bouts can lead to fibrosis, cirrhosis, cancer, or death. This chapter will focus on interactions between how the liver processes xenobiotic and endobiotic compounds through the cytochrome P450 system, and how these processes can result in a response from the innate immune cells of the liver. A number of different clinically relevant diseases, as well as experimental models, are currently available to study mechanisms related to the interplay of innate immunity and cytochrome P450-mediated metabolism. A major focus of the chapter will be to evaluate currently understood mechanisms in the context of these diseases, as a way of outlining mechanisms that dictate the interactions between the P450 system and innate immunity.
Collapse
Affiliation(s)
- Benjamin L Woolbright
- Department of Pharmacology, Toxicology and Therapeutics, Kansas University Medical Center, Kansas City, Kansas, USA
| | - Hartmut Jaeschke
- Department of Pharmacology, Toxicology and Therapeutics, Kansas University Medical Center, Kansas City, Kansas, USA.
| |
Collapse
|
37
|
Arighi C, Shamovsky V, Masci AM, Ruttenberg A, Smith B, Natale DA, Wu C, D’Eustachio P. Toll-like receptor signaling in vertebrates: testing the integration of protein, complex, and pathway data in the protein ontology framework. PLoS One 2015; 10:e0122978. [PMID: 25894391 PMCID: PMC4404318 DOI: 10.1371/journal.pone.0122978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Accepted: 02/26/2015] [Indexed: 11/20/2022] Open
Abstract
The Protein Ontology (PRO) provides terms for and supports annotation of species-specific protein complexes in an ontology framework that relates them both to their components and to species-independent families of complexes. Comprehensive curation of experimentally known forms and annotations thereof is expected to expose discrepancies, differences, and gaps in our knowledge. We have annotated the early events of innate immune signaling mediated by Toll-Like Receptor 3 and 4 complexes in human, mouse, and chicken. The resulting ontology and annotation data set has allowed us to identify species-specific gaps in experimental data and possible functional differences between species, and to employ inferred structural and functional relationships to suggest plausible resolutions of these discrepancies and gaps.
Collapse
Affiliation(s)
- Cecilia Arighi
- Center for Bioinformatics and Computational Biology, University of Delaware, Newark, Delaware, United States of America
| | - Veronica Shamovsky
- Department of Biochemistry & Molecular Pharmacology, NYU School of Medicine, New York, New York, United States of America
| | - Anna Maria Masci
- Department of Immunology, Duke University, Durham, North Carolina, United States of America
| | - Alan Ruttenberg
- School of Dental Medicine, State University of New York at Buffalo, Buffalo, New York, United States of America
| | - Barry Smith
- Department of Philosophy and Center of Excellence in Bioinformatics and Life Sciences, State University of New York at Buffalo, Buffalo, New York, United States of America
| | - Darren A. Natale
- Protein Information Resource, Department of Biochemistry and Molecular & Cellular Biology, Georgetown University Medical Center, Washington, D. C., United States of America
| | - Cathy Wu
- Center for Bioinformatics and Computational Biology, University of Delaware, Newark, Delaware, United States of America
- Protein Information Resource, Department of Biochemistry and Molecular & Cellular Biology, Georgetown University Medical Center, Washington, D. C., United States of America
| | - Peter D’Eustachio
- Department of Biochemistry & Molecular Pharmacology, NYU School of Medicine, New York, New York, United States of America
- * E-mail:
| |
Collapse
|
38
|
Monk JM, Liddle DM, De Boer AA, Brown MJ, Power KA, Ma DW, Robinson LE. Fish-oil-derived n-3 PUFAs reduce inflammatory and chemotactic adipokine-mediated cross-talk between co-cultured murine splenic CD8+ T cells and adipocytes. J Nutr 2015; 145:829-38. [PMID: 25833786 DOI: 10.3945/jn.114.205443] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 12/30/2014] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Obese adipose tissue (AT) inflammation is characterized by dysregulated adipokine production and immune cell accumulation. Cluster of differentiation (CD) 8+ T cell AT infiltration represents a critical step that precedes macrophage infiltration. n-3 (ω-3) Polyunsaturated fatty acids (PUFAs) exert anti-inflammatory effects in obese AT, thereby disrupting AT inflammatory paracrine signaling. OBJECTIVE We assessed the effect of n-3 PUFAs on paracrine interactions between adipocytes and primary CD8+ T cells co-cultured at the cellular ratio observed in obese AT. METHODS C57BL/6 mice were fed either a 3% menhaden fish-oil + 7% safflower oil (FO) diet (wt:wt) or an isocaloric 10% safflower oil (wt:wt) control (CON) for 3 wk, and splenic CD8+ T cells were isolated by positive selection (via magnetic microbeads) and co-cultured with 3T3-L1 adipocytes. Co-cultures were unstimulated (cells alone), T cell receptor stimulated, or lipopolysaccharide (LPS) stimulated for 24 h. RESULTS In LPS-stimulated co-cultures, FO reduced secreted protein concentrations of interleukin (IL)-6 (-42.6%), tumor necrosis factor α (-67%), macrophage inflammatory protein (MIP) 1α (-52%), MIP-1β (-62%), monocyte chemotactic protein (MCP) 1 (-23%), and MCP-3 (-19%) vs. CON, which coincided with a 74% reduction in macrophage chemotaxis toward secreted chemotaxins in LPS-stimulated FO-enriched co-culture-conditioned media. FO increased mRNA expression of the inflammatory signaling negative regulators monocyte chemoattractant 1-induced protein (Mcpip; +9.3-fold) and suppressor of cytokine signaling 3 (Socs3; +1.7-fold), whereas FO reduced activation of inflammatory transcription factors nuclear transcription factor κB (NF-κB) p65 and signal transducer and activator of transcription 3 (STAT3) by 27% and 33%, respectively. Finally, mRNA expression of the inflammasome components Caspase1 (-36.4%), Nod-like receptor family pyrin domain containing 3 (Nlrp3; -99%), and Il1b (-68.8%) were decreased by FO compared with CON (P ≤ 0.05). CONCLUSION FO exerted an anti-inflammatory and antichemotactic effect on the cross-talk between CD8+ T cells and adipocytes and has implications in mitigating macrophage-centered AT-driven components of the obese phenotype.
Collapse
Affiliation(s)
- Jennifer M Monk
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada; and Guelph Food Research Centre, Agriculture Agri-Food Canada, Guelph, Canada
| | - Danyelle M Liddle
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada; and
| | - Anna A De Boer
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada; and
| | - Morgan J Brown
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada; and
| | - Krista A Power
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada; and Guelph Food Research Centre, Agriculture Agri-Food Canada, Guelph, Canada
| | - David Wl Ma
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada; and
| | - Lindsay E Robinson
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada; and
| |
Collapse
|
39
|
Abstract
The mammalian Toll-like receptor (TLR) family consists of 13 members, and recognizes specific patterns of microbial components, called pathogen-associated molecular patterns (PAMPs). TLR-dependent recognition of PAMPs leads to activation of the innate immune system, which subsequently leads to activation of antigen-specific adaptive immunity. The TLR-mediated signaling pathways consist of the MyD88-dependent pathway and TRIF-dependent pathway, both of which induce gene expression. This unit discusses mammalian TLRs (TLR1 to 13) that have an essential role in the innate immune recognition of microorganisms. Also discussed are TLR-mediated signaling pathways and antibodies that are available to detect specific TLRs.
Collapse
Affiliation(s)
- Kiyoshi Takeda
- Graduate School of Medicine, Osaka University, Osaka, Japan.,WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Shizuo Akira
- WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan
| |
Collapse
|
40
|
Hsieh SC, Tsao JT, Lew WZ, Chan YH, Lee LW, Lin CT, Huang YK, Huang HM. Static magnetic field attenuates lipopolysaccharide-induced inflammation in pulp cells by affecting cell membrane stability. ScientificWorldJournal 2015; 2015:492683. [PMID: 25884030 DOI: 10.1155/2015/492683] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 08/28/2014] [Indexed: 12/02/2022] Open
Abstract
One of the causes of dental pulpitis is lipopolysaccharide- (LPS-) induced inflammatory response. Following pulp tissue inflammation, odontoblasts, dental pulp cells (DPCs), and dental pulp stem cells (DPSCs) will activate and repair damaged tissue to maintain homeostasis. However, when LPS infection is too serious, dental repair is impossible and disease may progress to irreversible pulpitis. Therefore, the aim of this study was to examine whether static magnetic field (SMF) can attenuate inflammatory response of dental pulp cells challenged with LPS. In methodology, dental pulp cells were isolated from extracted teeth. The population of DPSCs in the cultured DPCs was identified by phenotypes and multilineage differentiation. The effects of 0.4 T SMF on DPCs were observed through MTT assay and fluorescent anisotropy assay. Our results showed that the SMF exposure had no effect on surface markers or multilineage differentiation capability. However, SMF exposure increases cell viability by 15%. In addition, SMF increased cell membrane rigidity which is directly related to higher fluorescent anisotropy. In the LPS-challenged condition, DPCs treated with SMF demonstrated a higher tolerance to LPS-induced inflammatory response when compared to untreated controls. According to these results, we suggest that 0.4 T SMF attenuates LPS-induced inflammatory response to DPCs by changing cell membrane stability.
Collapse
|
41
|
Schwarz H, Schmittner M, Duschl A, Horejs-Hoeck J. Residual endotoxin contaminations in recombinant proteins are sufficient to activate human CD1c+ dendritic cells. PLoS One 2014; 9:e113840. [PMID: 25478795 DOI: 10.1371/journal.pone.0113840] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 10/31/2014] [Indexed: 12/03/2022] Open
Abstract
Many commercially available recombinant proteins are produced in Escherichia coli, and most suppliers guarantee contamination levels of less than 1 endotoxin unit (EU). When we analysed commercially available proteins for their endotoxin content, we found contamination levels in the same range as generally stated in the data sheets, but also some that were higher. To analyse whether these low levels of contamination have an effect on immune cells, we stimulated the monocytic cell line THP-1, primary human monocytes, in vitro differentiated human monocyte-derived dendritic cells, and primary human CD1c+ dendritic cells (DCs) with very low concentrations of lipopolysaccharide (LPS; ranging from 0.002–2 ng/ml). We show that CD1c+ DCs especially can be activated by minimal amounts of LPS, equivalent to the levels of endotoxin contamination we detected in some commercially available proteins. Notably, the enhanced endotoxin sensitivity of CD1c+ DCs was closely correlated with high CD14 expression levels observed in CD1c+ DCs that had been maintained in cell culture medium for 24 hours. When working with cells that are particularly sensitive to LPS, even low endotoxin contamination may generate erroneous data. We therefore recommend that recombinant proteins be thoroughly screened for endotoxin contamination using the limulus amebocyte lysate test, fluorescence-based assays, or a luciferase based NF-κB reporter assay involving highly LPS-sensitive cells overexpressing TLR4, MD-2 and CD14.
Collapse
|
42
|
Wang TY, Su NY, Shih PC, Tsai PS, Huang CJ. Anti-inflammation effects of naloxone involve phosphoinositide 3-kinase delta and gamma. J Surg Res 2014; 192:599-606. [DOI: 10.1016/j.jss.2014.06.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 04/18/2014] [Accepted: 06/09/2014] [Indexed: 10/25/2022]
|
43
|
Liaunardy-Jopeace A, Gay NJ. Molecular and cellular regulation of toll-like receptor-4 activity induced by lipopolysaccharide ligands. Front Immunol 2014; 5:473. [PMID: 25339952 PMCID: PMC4186342 DOI: 10.3389/fimmu.2014.00473] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 09/15/2014] [Indexed: 12/22/2022] Open
Abstract
As well as being the primary signaling receptor for bacterial endotoxin or lipopolysaccharide Toll-like receptor-4 function is modulated by numerous factors not only in the context of microbial pathogenesis but also autoimmune and allergic diseases. TLR4 is subject to multiple levels of endogenous control and regulation from biosynthesis and trafficking to signal transduction and degradation. On the other hand regulation of TLR4 activity breaks down during Gram −ve sepsis leading to systemic damage, multi organ failure, and death. In this article, we review how TLR4 traffics from the early secretory pathway, the cis/trans Golgi to the cell surface and endolysosomal compartments. We will present evidence about how these processes influence signaling and can potentially lead to increased sensitivity to ligand-dependent activation as well as ligand-independent constitutive activation that may contribute to pathogenesis in sepsis. We will also discuss how sustained signaling may be coupled to endocytosis and consider the potential molecular mechanisms of immuno-modulators that modify TLR4 signaling function including the cat allergen FelD1 and endogenous protein ligands such as the extracellular matrix protein tenascin C and calprotectin (MRP8/14).
Collapse
Affiliation(s)
| | - Nicholas J Gay
- Department of Biochemistry, University of Cambridge , Cambridge , UK
| |
Collapse
|
44
|
Park SH, Kim J, Do KH, Park J, Oh CG, Choi HJ, Song BG, Lee SJ, Kim YS, Moon Y. Activating transcription factor 3-mediated chemo-intervention with cancer chemokines in a noncanonical pathway under endoplasmic reticulum stress. J Biol Chem 2014; 289:27118-27133. [PMID: 25122760 DOI: 10.1074/jbc.m114.568717] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The cell-protective features of the endoplasmic reticulum (ER) stress response are chronically activated in vigorously growing malignant tumor cells, which provide cellular growth advantages over the adverse microenvironment including chemotherapy. As an intervention with ER stress responses in the intestinal cancer cells, preventive exposure to flavone apigenin potentiated superinduction of a regulatory transcription factor, activating transcription factor 3 (ATF3), which is also known to be an integral player coordinating ER stress response-related gene expression. ATF3 superinduction was due to increased turnover of ATF3 transcript via stabilization with HuR protein in the cancer cells under ER stress. Moreover, enhanced ATF3 caused inhibitory action against ER stress-induced cancer chemokines that are potent mediators determining the survival and metastatic potential of epithelial cancer cells. Although enhanced ATF3 was a negative regulator of the well known proinflammatory transcription factor NF-κB, blocking of NF-κB signaling did not affect ER stress-induced chemokine expression. Instead, immediately expressed transcription factor early growth response protein 1 (EGR-1) was positively involved in cancer chemokine induction by ER stressors. ER stress-induced EGR-1 and subsequent chemokine production were repressed by ATF3. Mechanistically, ATF3 directly interacted with and recruited HDAC1 protein, which led to epigenetic suppression of EGR-1 expression and subsequent chemokine production. Conclusively, superinduced ATF3 attenuated ER stress-induced cancer chemokine expression by epigenetically interfering with induction of EGR-1, a transcriptional modulator crucial to cancer chemokine production. Thus, these results suggest a potent therapeutic intervention of ER stress response-related cancer-favoring events by ATF3.
Collapse
Affiliation(s)
- Seong-Hwan Park
- Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University School of Medicine, Yangsan 626-870, Korea,; Research Institute for Basic Sciences and Medical Research Institute, Pusan National University, Busan 609-735, Korea
| | - Juil Kim
- Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University School of Medicine, Yangsan 626-870, Korea
| | - Kee Hun Do
- Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University School of Medicine, Yangsan 626-870, Korea
| | - Jiyeon Park
- Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University School of Medicine, Yangsan 626-870, Korea
| | - Chang Gyu Oh
- Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University School of Medicine, Yangsan 626-870, Korea
| | - Hye Jin Choi
- Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University School of Medicine, Yangsan 626-870, Korea
| | - Bo Gyoung Song
- Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University School of Medicine, Yangsan 626-870, Korea
| | - Seung Joon Lee
- Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University School of Medicine, Yangsan 626-870, Korea
| | - Yong Sik Kim
- Department of Pharmacology, College of Medicine, Seoul National University, Seoul 110-799, Korea, and
| | - Yuseok Moon
- Laboratory of Mucosal Exposome and Biomodulation, Department of Biomedical Sciences, Pusan National University School of Medicine, Yangsan 626-870, Korea,; Research Institute for Basic Sciences and Medical Research Institute, Pusan National University, Busan 609-735, Korea,; Immunoregulatory Therapeutics Group in Brain Busan 21 Project, Busan 609-735, South Korea.
| |
Collapse
|
45
|
Aranda F, Vacchelli E, Obrist F, Eggermont A, Galon J, Sautès-Fridman C, Cremer I, Henrik Ter Meulen J, Zitvogel L, Kroemer G, Galluzzi L. Trial Watch: Toll-like receptor agonists in oncological indications. Oncoimmunology 2014; 3:e29179. [PMID: 25083332 PMCID: PMC4091055 DOI: 10.4161/onci.29179] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 05/09/2014] [Indexed: 12/20/2022] Open
Abstract
Toll-like receptors (TLRs) are an evolutionarily conserved group of enzymatically inactive, single membrane-spanning proteins that recognize a wide panel of exogenous and endogenous danger signals. Besides constituting a crucial component of the innate immune response to bacterial and viral pathogens, TLRs appear to play a major role in anticancer immunosurveillance. In line with this notion, several natural and synthetic TLR ligands have been intensively investigated for their ability to boost tumor-targeting immune responses elicited by a variety of immunotherapeutic and chemotherapeutic interventions. Three of these agents are currently approved by the US Food and Drug Administration (FDA) or equivalent regulatory agencies for use in cancer patients: the so-called bacillus Calmette-Guérin, monophosphoryl lipid A, and imiquimod. However, the number of clinical trials testing the therapeutic potential of both FDA-approved and experimental TLR agonists in cancer patients is stably decreasing, suggesting that drug developers and oncologists are refocusing their interest on alternative immunostimulatory agents. Here, we summarize recent findings on the use of TLR agonists in cancer patients and discuss how the clinical evaluation of FDA-approved and experimental TLR ligands has evolved since the publication of our first Trial Watch dealing with this topic.
Collapse
Affiliation(s)
- Fernando Aranda
- Gustave Roussy; Villejuif, France ; INSERM, UMRS1138; Paris, France ; Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers; Paris, France ; Université Paris-Sud/Paris XI; Paris, France
| | - Erika Vacchelli
- Gustave Roussy; Villejuif, France ; INSERM, UMRS1138; Paris, France ; Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers; Paris, France ; Université Paris-Sud/Paris XI; Paris, France
| | - Florine Obrist
- Gustave Roussy; Villejuif, France ; INSERM, UMRS1138; Paris, France ; Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers; Paris, France ; Université Paris-Sud/Paris XI; Paris, France
| | | | - Jérôme Galon
- INSERM, UMRS1138; Paris, France ; Université Paris Descartes/Paris V, Sorbonne Paris Cité; Paris, France ; Laboratory of Integrative Cancer Immunology, Centre de Recherche des Cordeliers; Paris, France
| | - Catherine Sautès-Fridman
- INSERM, UMRS1138; Paris, France ; Université Paris Descartes/Paris V, Sorbonne Paris Cité; Paris, France ; Université Pierre et Marie Curie/Paris VI; Paris, France ; Equipe 13, Centre de Recherche des Cordeliers; Paris, France
| | - Isabelle Cremer
- INSERM, UMRS1138; Paris, France ; Université Pierre et Marie Curie/Paris VI; Paris, France ; Université Paris Descartes/Paris V, Sorbonne Paris Cité; Paris, France ; Equipe 13, Centre de Recherche des Cordeliers; Paris, France
| | | | - Laurence Zitvogel
- Gustave Roussy; Villejuif, France ; INSERM, U1015; CICBT507; Villejuif, France
| | - Guido Kroemer
- Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP; Villejuif, France ; Metabolomics and Cell Biology Platforms, Gustave Roussy; Villejuif, France ; INSERM, UMRS1138; Paris, France ; Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers; Paris, France ; Université Paris Descartes/Paris V, Sorbonne Paris Cité; Paris, France
| | - Lorenzo Galluzzi
- Gustave Roussy; Villejuif, France ; Equipe 11 labellisée par la Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers; Paris, France ; Université Paris Descartes/Paris V, Sorbonne Paris Cité; Paris, France
| |
Collapse
|
46
|
Ishida A, Akita K, Mori Y, Tanida S, Toda M, Inoue M, Nakada H. Negative regulation of Toll-like receptor-4 signaling through the binding of glycosylphosphatidylinositol-anchored glycoprotein, CD14, with the sialic acid-binding lectin, CD33. J Biol Chem 2014; 289:25341-50. [PMID: 25059667 DOI: 10.1074/jbc.m113.523480] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
When monocyte-derived immature dendritic cells (imDCs) were stimulated with LPS in the presence of anti-CD33/Siglec-3 mAb, the production of IL-12 and phosphorylation of NF-κB decreased significantly. The cell surface proteins of imDCs were chemically cross-linked, and CD33-linked proteins were analyzed by SDS-PAGE and immunoblotting. It was CD14 that was found to be cross-linked with CD33. A proximity ligation assay also indicated that CD33 was colocalized with CD14 on the cell surface of imDCs. Sialic acid-dependent binding of CD33 to CD14 was confirmed by a plate assay using recombinant CD33 and CD14. Three types of cells (HEK293T cells expressing the LPS receptor complex (Toll-like receptor (TLR) cells), and the LPS receptor complex plus either wild-type CD33 (TLR/CD33WT cells) or mutated CD33 without sialic acid-binding activity (TLR/CD33RA cells)) were prepared, and then the binding and uptake of LPS were investigated. Although the level of LPS bound on the cell surface was similar among these cells, the uptake of LPS was reduced in TLR/CD33WT cells. A higher level of CD14-bound LPS and a lower level of TLR4-bound LPS were detected in TLR/CD33WT cells compared with the other two cell types, probably due to reduced presentation of LPS from CD14 to TLR4. Phosphorylation of NF-κB after stimulation with LPS was also compared. Wild-type CD33 but not mutated CD33 significantly reduced the phosphorylation of NF-κB. These results suggest that CD14 is an endogenous ligand for CD33 and that ligation of CD33 with CD14 modulates with the presentation of LPS from CD14 to TLR4, leading to down-regulation of TLR4-mediated signaling.
Collapse
Affiliation(s)
- Akiko Ishida
- From the Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo-Motoyama, Kita-Ku, Kyoto 603-8555, Japan
| | - Kaoru Akita
- From the Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo-Motoyama, Kita-Ku, Kyoto 603-8555, Japan
| | - Yugo Mori
- From the Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo-Motoyama, Kita-Ku, Kyoto 603-8555, Japan
| | - Shuhei Tanida
- From the Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo-Motoyama, Kita-Ku, Kyoto 603-8555, Japan
| | - Munetoyo Toda
- From the Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo-Motoyama, Kita-Ku, Kyoto 603-8555, Japan
| | - Mizue Inoue
- From the Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo-Motoyama, Kita-Ku, Kyoto 603-8555, Japan
| | - Hiroshi Nakada
- From the Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo-Motoyama, Kita-Ku, Kyoto 603-8555, Japan
| |
Collapse
|
47
|
Ye M, Wang Q, Zhang W, Li Z, Wang Y, Hu R. Oroxylin A exerts anti-inflammatory activity on lipopolysaccharide-induced mouse macrophage via Nrf2/ARE activation. Biochem Cell Biol 2014; 92:337-48. [PMID: 25247252 DOI: 10.1139/bcb-2014-0030] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Regulating inflammation could be an important measure for the effective treatment of cancer. Here we examine the mechanisms by which oroxylin A inhibits inflammation in RAW264.7 cells. The results demonstrate that pretreatment with oroxylin A (50, 100, and 150 μmol/L) inhibited lipopolysaccharide (LPS)-induced mRNA and protein expression of COX-2 and iNOS. In addition, oroxylin A significantly increased the protein expression of nuclear factor erythroid 2-related factor 2 (Nrf2), heme oxygenase 1 (HO-1), and NADP(H):quinone oxidoreductase (NQO1), induced Nrf2 translocation to the nucleus and up-regulated antioxidant response element (ARE)-luciferase reporter activity. Moreover, oroxylin A inhibited Nrf2 ubiquitination and proteasome activity. Transfection with Nrf2 siRNA knocked down Nrf2 expression and partially reversed oroxylin A-mediated inhibition of LPS-induced COX-2 and iNOS expression. Importantly, we showed for the first time that Nrf2 plays an important role in oroxylin A-suppressed inflammation in RAW264.7 cells. Uncovering the effect of oroxylin A on the regulation of Nrf2 signaling may be beneficial for developing new therapeutic strategies against inflammatory diseases.
Collapse
Affiliation(s)
- Ming Ye
- a State Key Laboratory of Natural Medicines, Department of Physiology, China Pharmaceutical University, 24 Tongjia Xiang, Jiangsu 210009, China
| | | | | | | | | | | |
Collapse
|
48
|
Shi Q, Cao J, Fang L, Zhao H, Liu Z, Ran J, Zheng X, Li X, Zhou Y, Ge D, Zhang H, Wang L, Ran Y, Fu J. Geniposide suppresses LPS-induced nitric oxide, PGE2 and inflammatory cytokine by downregulating NF-κB, MAPK and AP-1 signaling pathways in macrophages. Int Immunopharmacol 2014; 20:298-306. [PMID: 24735815 DOI: 10.1016/j.intimp.2014.04.004] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 03/25/2014] [Accepted: 04/01/2014] [Indexed: 11/29/2022]
Abstract
Inflammatory responses are important to host immune reactions, but uncontrolled inflammatory mediators may aid in the pathogenesis of other inflammatory diseases. Geniposide, an iridoid glycoside found in the herb gardenia, is believed to have broad-spectrum anti-inflammatory effects in murine models but its mechanism of action is unclear. We investigated the action of this compound in murine macrophages stimulated by lipopolysaccharide (LPS), as the stimulation of macrophages by LPS is known to induce inflammatory reactions. We determined the effect of geniposide on LPS-induced production of the inflammatory mediators, nitric oxide (NO) and prostaglandin E2 (PGE2), the mRNA and protein expression of the NO and PGE2 synthases, inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2), respectively, and the mRNA and protein expression of the inflammatory cytokine, tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6). Furthermore, nuclear factor (NF)-κB, mitogen-activated protein kinase (MAPK) and activator protein (AP)-1 activity were assayed. To understand the action of geniposide on the NF-κB and MAPK pathways, we studied the effect of NF-κB and MAPK inhibitors on the LPS-induced production of NO, PGE2 and TNF-α. Our findings clearly showed that geniposide mainly exerts its anti-inflammatory effects by inhibiting the LPS-induced NF-κB, MAPK and AP-1 signaling pathways in macrophages, which subsequently reduces overexpression of the inducible enzymes iNOS and COX-2 and suppresses the expression and release of the inflammatory factors, TNF-α, IL-6, NO and PGE2. Thus, geniposide shows promise as a therapeutic agent in inflammatory diseases.
Collapse
Affiliation(s)
- Qinghai Shi
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China.
| | - Jinjun Cao
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China
| | - Li Fang
- Second Section, Lintong Sanatorium of Lanzhou Military Region, Xi'an 710600, Shaanxi, China
| | - Hongyan Zhao
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China
| | - Zhengxiang Liu
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China
| | - Jihua Ran
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China
| | - Xinchuan Zheng
- Medical Research Center, Southwestern Hospital, Third Military Medical University, Chongqing 400038, China
| | - Xiaoling Li
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China
| | - Yu Zhou
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China
| | - Di Ge
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China
| | - Hongming Zhang
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China
| | - Li Wang
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China
| | - Ying Ran
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China
| | - Jianfeng Fu
- Clinical Laboratory Diagnostic Center, Urumqi General Hospital of Lanzhou Military Region, Urumqi 830000, Xinjiang, China.
| |
Collapse
|
49
|
Kanhai DA, de Kleijn DPV, Kappelle LJ, Uiterwaal CSPM, van der Graaf Y, Pasterkamp G, Geerlings MI, Visseren FLJ. Extracellular vesicle protein levels are related to brain atrophy and cerebral white matter lesions in patients with manifest vascular disease: the SMART-MR study. BMJ Open 2014; 4:e003824. [PMID: 24430876 PMCID: PMC3902438 DOI: 10.1136/bmjopen-2013-003824] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVES Extracellular vesicles (EVs) and their protein levels have been identified as a potential risk marker for the development of vascular disease. In the present study, we assessed whether levels of four previously identified EV proteins (cystatin C, serpin G1, serpin F2 and CD14) are associated with cerebral white matter lesions (WMLs) and brain atrophy. DESIGN Cohort study; cross-sectional and prospective. SETTING Single centre, secondary and tertiary setting. PARTICIPANTS 1309 patients with manifest vascular disease from the Second Manifestations of ARTerial disease-MR (SMART-MR) study, of which 994 had successful brain MRI and EV protein level measurements. OUTCOMES WML and brain parenchymal fraction (BPF), as parameter for brain atrophy, at baseline and follow-up. STATISTICAL METHODS The relationship between EV protein levels and WML volume (expressed as log transformed percentage of intracranial volume) and BPF (expressed percentage of intracranial volume) on 1.5 T brain MRI was assessed with multivariable linear regression modelling. Subsequently, the relationship between baseline EV protein levels and progression of atrophy and WML was analysed in 534 patients, in whom a follow-up MRI was obtained after 4 years. RESULTS Higher EV-cystatin C and EV-CD14 were significantly associated with larger WML volume (linear regression coefficient (95% CI) 0.10 log %/SD (0.04 to 0.17) and 0.14 log %/SD (0.07 to 0.20), respectively. Higher EV-CD14 was associated with more brain atrophy (-0.14%/SD; -0.27 to -0.01). Baseline EV-CD14 was significantly associated with increase of WMLs (0.11 log %/SD (0.04 to 0.18)). No relationship with EV-serpins was observed at baseline or at follow-up. CONCLUSIONS EV proteins cystatin C and CD14 are related to cerebral WMLs and the progression of brain atrophy in patients with manifest vascular disease, potentially identifying EVs in the aetiology of structural brain changes.
Collapse
Affiliation(s)
- Danny A Kanhai
- Department of Vascular Medicine, University Medical Center Utrecht (UMC Utrecht), Utrecht, The Netherlands
| | | | | | | | | | | | | | | |
Collapse
|
50
|
Huang YH, Yen JC, Lee JJ, Liao JF, Liaw WJ, Huang CJ. Suppressive effects of levobupivacaine on endotoxin-induced microglial activation. J Surg Res 2013; 184:989-96. [DOI: 10.1016/j.jss.2013.03.074] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 03/17/2013] [Accepted: 03/21/2013] [Indexed: 12/13/2022]
|