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Hong Z, Xu H, Ni K, Yang Y, Deng S. Effect of Cyclosporin H on ischemic injury and neutrophil infiltration in cerebral infarct model of rats via PET imaging. Ann Nucl Med 2024; 38:337-349. [PMID: 38360964 DOI: 10.1007/s12149-024-01900-0] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 01/03/2024] [Indexed: 02/17/2024]
Abstract
BACKGROUND Brain ischemia-reperfusion injury is a complex process, and neuroinflammation is an important secondary contributing pathological event. Neutrophils play major roles in ischemic neuroinflammation. Once activated, neutrophils express formyl peptide receptors (FPRs), which are special receptors of a class of chemoattractants and may be potential targets to regulate the activity of neutrophils and control cerebral ischemic injury. This study was aimed to explore the ameliorating effect of Cyclosporin H (CsH), a potent FPR antagonist, on brain ischemic injury by inhibiting the activation and migration of neutrophils, and improving cerebral blood flow. METHODS We employed a middle cerebral artery occlusion (MCAO) Model on rats and performed behavioral, morphological, and microPET imaging assays to investigate the potential restoring efficacy of CsH on cerebral ischemic damages. Peptide N-cinnamoyl-F-(D)L-F-(D)L-F (cFLFLF), an antagonist to the neutrophil FPR with a high binding affinity, was used for imaging neutrophil distribution. RESULTS We found that CsH had similar effect with edaravone on improving the neurobehavioral deficient symptoms after cerebral ischemia-reperfusion, and treatment with CsH also alleviated ischemic cerebral infarction. Compared with the MCAO Model group, [18F]FDG uptake ratios of the CsH and edaravone treatment groups were significantly higher. The CsH-treated groups also showed significant increases in [18F]FDG uptake at 144 h when compared with that of 24 h. This result indicates that like edaravone, treatment with both doses of CsH promoted the recovery of blood supply after cerebral ischemic event. Moreover, MCAO-induced cerebral ischemia significantly increased the radiouptake of [68Ga]Ga-cFLFLF at 72 h after ischemia-reperfusion operation. Compared with MCAO Model group, radiouptake values of [68Ga]-cFLFLF in both doses of CsH and edaravone groups were all decreased significantly. These results showed that both doses of CsH resulted in a similar therapeutic effect with edaravone on inhibiting neutrophil infiltration in cerebral infarction. CONCLUSION Potent FPR antagonist CsH is promisingly beneficial in attenuating neuroinflammation and improving neurobehavioral function against cerebral infarction. Therefore, FPR may become a novel target for regulating neuroinflammation and improving prognosis for ischemic cerebrovascular disorders.
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Affiliation(s)
- Zhihui Hong
- Department of Nuclear Medicine, The Second Affiliated Hospital of Soochow University, Suzhou, 215002, China
- State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China
- NHC Key Laboratory of Nuclear Medicine and Jiangsu Key Laboratory of Molecular Nuclear Medicine, Wuxi, 214063, China
| | - Hong Xu
- Department of Oncology, Changshu Hospital Affiliated to Soochow University, Changzhou No. 1 People's Hospital, Suzhou, 215006, China
| | - Kairu Ni
- Department of Nuclear Medicine, The Second Affiliated Hospital of Soochow University, Suzhou, 215002, China
| | - Yi Yang
- Department of Nuclear Medicine, Suzhou Science and Technology Town Hospital, Suzhou, 215153, China.
| | - Shengming Deng
- Department of Nuclear Medicine, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China.
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Li G, Park HJ, Suh JH, Choi HS. 7-Ketocholesterol plays a key role in cholesterol-induced hepatitis via macrophage and neutrophil infiltration. J Nutr Biochem 2024; 125:109552. [PMID: 38134972 DOI: 10.1016/j.jnutbio.2023.109552] [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: 07/23/2023] [Revised: 12/18/2023] [Accepted: 12/19/2023] [Indexed: 12/24/2023]
Abstract
This study sought to explore the role of 7-ketocholesterol (7-KC) in liver damage caused by high cholesterol intake and its potential pathological mechanism in mice. Our in vivo findings indicated that mice fed a high-cholesterol diet had elevated serum levels of 7-KC, accompanied by liver injury and inflammation, similar to human nonalcoholic steatohepatitis. Furthermore, the high-cholesterol diet induced neutrophil infiltration, which played a critical role in liver damage through myeloperoxidase (MPO) activity. Upon stimulation with 7-KC, macrophages exhibited increased expression of C-X-C motif chemokine ligand 1 (CXCL1) and CXCL2, as well as ATP-binding cassette transporter A1 (ABCA1) and ABCG1. Hepatocytes, on the other hand, exhibited increased expression of CXCL2 and ABCG1. The infiltration of neutrophils in the liver was primarily caused by CXCL1 and CXCL2, resulting in hepatocyte cell death due to elevated MPO activity. Our data also revealed that the activation of macrophages by 7-KC via ABCA1 or ABCG1 was not associated with lipid accumulation. Collectively, these findings suggest that high cholesterol-induced hepatitis in mice involves, at least partially, the recruitment of neutrophils to the liver by 7-KC-activated macrophages. This is mediated by increased expression of CXCL1 and CXCL2 through ABCA1 or ABCG1, which act as 7-KC efflux transporters. Additionally, hepatocytes contribute to this process by increased expression of CXCL2 through ABCG1. Therefore, our findings suggest that 7-KC may play a role in high cholesterol-induced hepatitis in mice by activating macrophages and hepatocytes, ultimately leading to neutrophil infiltration.
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Affiliation(s)
- Guoen Li
- Department of Biological Sciences, University of Ulsan, Ulsan, Korea
| | - Hyun-Jung Park
- Department of Biological Sciences, University of Ulsan, Ulsan, Korea
| | - Jae-Hee Suh
- Department of Pathology, Ulsan University Hospital, Ulsan, Korea
| | - Hye-Seon Choi
- Department of Biological Sciences, University of Ulsan, Ulsan, Korea.
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Jensen LK, Jensen HE, Gottlieb H. Intraoperative tissue sampling for histology in chronic osteomyelitis shows high neutrophil infiltration centrally and low remains in debrided presumed infection-free regions. Injury 2024; 55:111178. [PMID: 37952476 DOI: 10.1016/j.injury.2023.111178] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 10/30/2023] [Accepted: 11/01/2023] [Indexed: 11/14/2023]
Abstract
INTRODUCTION Histology of debrided bone tissue is a confirmatory diagnostic criterion for fracture related infection (FRI) and prosthetic joint infection (PJI). The aim of the present study was to describe the histopathology of the first and last debrided bone tissue in chronic osteomyelitis (CO) according to the international diagnostic guidelines for FRI and PJI. METHODS 15 patients with CO were allocated to surgical treatment using a one-stage protocol including extensive debridement. Suspected infected bone tissue eradicated early in the debridement procedure was collected as a clearly infected sample (S1). Likewise, the last eradicated bone tissue was collected as a suspected non-infected sample (S2). The samples were processed for histology. HE-stained sections were patho-morphologically examinated. Immunohistochemistry with MAC-387 antibodies towards calprotectin was used for estimation of neutrophil granulocyte (NP) score (0, 1, 2 or 3). RESULTS S1 samples showed a mean NP score of 2.6 (3 is confirmatory for infection). Following debridement, the NP score was significantly (p = 0.005) reduced to a mean NP score of 1.6. The S1 samples showed a mix of fibrovascular tissue, dense fibrosis, viable bone, bone necrosis and bone debris. S2 samples contained mostly viable bone tissue, however, often small fragments of necrotic bone or bone debris were present. CONCLUSION The inflammatory response of CO still exists after debridement, although the response fades from the center. Therefore, sampling of debrided bone tissue for histology must be performed initially during surgery, otherwise there is a risk for underestimation of NP infiltration. The present results might also be highly relevant for FRI and PJI.
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Affiliation(s)
- Louise Kruse Jensen
- Department of Veterinary and Animal Science, Faculty of Health and Medical Sciences, University of Copenhagen, København, Denmark.
| | - Henrik Elvang Jensen
- Department of Veterinary and Animal Science, Faculty of Health and Medical Sciences, University of Copenhagen, København, Denmark
| | - Hans Gottlieb
- Department of Orthopedic Surgery, Herlev Hospital, 2730, Herlev, Denmark
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Yu C, Zhou G, Shi Z, Yu L, Zhou X. TREM1 facilitates the development of gastric cancer through regulating neutrophil extracellular traps-mediated macrophage polarization. Dig Liver Dis 2023:S1590-8658(23)01082-4. [PMID: 38151453 DOI: 10.1016/j.dld.2023.12.002] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 12/04/2023] [Accepted: 12/07/2023] [Indexed: 12/29/2023]
Abstract
Triggering receptor expressed on myeloid cell 1 (TREM1) elevation is associated with the unfavorable prognosis of gastric cancer (GC) patients. This work uncovered the effects and mechanism of TREM1 in GC. IHC staining examined TREM1 expression in GC tissues. TREM1-knockout and TREM1 knock-in mice were generated prior to the construction of N-methyl-N'-nitro-N-nitrosoguanidine (MNNG)-induced GC mice model. H&E staining detected the pathological alternations of gastric tissues. IHC staining tested Ki67 expression. Wright-Giemsa staining performed neutrophil counting and flow cytometry analysis measured neutrophil infiltration. ELISA analyzed serum and tissue myeloperoxidase (MPO) levels and serum MPO-DNA levels. Immunofluorescence, Western blotting and related kits detected NETs formation. Immunofluorescence and IHC staining evaluated macrophage polarization. In MNNG-treated GES-1 cells and phorbal myristate acetate (PMA)-treated neutrophils, TREM1 expression was also examined. CCK-8 method and Western blotting assayed cell proliferation. Western blotting and immunofluorescence detected NETs formation. Flow cytometry analysis detected the changes of macrophage typing. TREM1 was overexpressed in tumor tissues, MNNG-treated GES-1 cells and PMA-treated neutrophils. TREM1 deficiency hindered tumor growth, reduced neutrophil infiltration, NETs formation and stimulated M1 macrophage polarization in MNNG-induced GC models. Neutrophil extracellular traps (NETs) degrader DNase-1 countervailed the impacts of TREM1 on MNNG-induced GC models in vivo. Collectively, TREM1 knockdown obstructed NETs-mediated M2 macrophage polarization to hamper GC progression.
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Affiliation(s)
- Cheng Yu
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, China; Department of General Surgery, Affiliated Changshu Hospital of Nantong University, Changshu, 215500, China
| | - Guoqiang Zhou
- Department of General Surgery, Affiliated Changshu Hospital of Nantong University, Changshu, 215500, China
| | - Zhiliang Shi
- Department of General Surgery, Affiliated Changshu Hospital of Nantong University, Changshu, 215500, China
| | - Liang Yu
- Department of General Surgery, Affiliated Changshu Hospital of Nantong University, Changshu, 215500, China
| | - Xiaojun Zhou
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, China.
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Bao J, Zhang X, Li B, Niu M, Wu Z, Song P, Guo X, Husain SZ, Hu G, Li L, Wen L. AXL and MERTK receptor tyrosine kinases inhibition protects against pancreatic necrosis via selectively limiting CXCL2-related neutrophil infiltration. Biochim Biophys Acta Mol Basis Dis 2022; 1868:166490. [PMID: 35841983 DOI: 10.1016/j.bbadis.2022.166490] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/27/2022] [Accepted: 07/08/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Acute pancreatitis (AP) was initiated within pancreatic parenchymal cells and sustained by uncontrolled inflammatory responses. AXL and MERTK receptor tyrosine kinases play a crucial role in negatively regulating the innate immunity. Therefore, this study aimed to investigate the role and underlying mechanism of AXL and MERTK in AP. METHODS Experimental AP was induced by ten hourly intraperitoneal administration of caerulein in global, hematopoietic- and pancreas-specific Axl and Mertk deficient mice. Pancreatitis severity was assessed biochemically and histologically. Pancreatic transcriptomics and pancreatic infiltrating immune cells were profiled. Some mice were given R428, an antagonist of AXL and MERTK. AXL and MERTK in peripheral leukocytes were measured by flow cytometry. FINDINGS The levels of AXL and MERTK in pancreatic tissue and pancreatic CD45+ cells were dynamically altered at 6 h and 12 h after the 1st injection of caerulein. Global and hematopoietic-specific, but not pancreas-specific deletion of Axl and Mertk protected against pancreatic necrosis and trypsinogen activation. Pancreatic transcriptomic analysis revealed that differentially expressed gene signatures were mainly related to metabolic and inflammatory pathways. Furthermore, deletion or inhibition of Axl and Mertk selectively inhibited pancreatic neutrophil infiltration, which was primarily related to CXCL2 secreted by pro-inflammatory macrophages. Increased levels of MERTK in peripheral leukocytes were correlated with more severe form of AP. INTERPRETATION Our findings reveal that specific AXL/MERTK antagonist may be a novel and potential early treatment for AP and the levels of MERTK in peripheral leukocytes may be a promising biomarker for predicting pancreatic severity in patients with AP. FUNDING National Natural Science Foundation of China, Shanghai Natural Science Foundation, a Shanghai Young Talent Award and a Shanghai Young Orient Scholar Award. RESEARCH IN CONTEXT Evidence before this study Acute pancreatitis (AP) is a common inflammatory disorder of the exocrine pancreas, the severity of which was determined by the extent of pancreatic necrosis, with no targeted therapy. AP was initiated by signals within pancreatic parenchymal cells and sustained by uncontrolled innate immune responses. One of the three crucial regulatory roles for AXL and MERTK is to negatively regulate innate immune responses. Added value of this study Global and hematopoietic-, but not pancreas-specific Axl and Mertk deficiency protected against pancreatitis, primarily pancreatic necrosis. Deletion of Axl and Mertk selectively inhibited pancreatic neutrophil infiltration that was related to CXCL2 secreted by pro-inflammatory macrophages. AXL and MERTK antagonist similarly reduced pancreatitis severity via limiting CXCL2-mediated pancreatic neutrophil infiltration. Higher levels of MERTK, but not AXL in peripheral leukocytes were correlated with more severe form of acute pancreatitis. Implications of all the available evidence A specific AXL/MERTK antagonist may be a novel and potential early treatment for AP. The level of MERTK on peripheral leukocytes may be a promising biomarker for predicting disease severity in patients with AP.
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Affiliation(s)
- Jingpiao Bao
- Department of Gastroenterology and Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiuli Zhang
- Department of Gastroenterology and Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Bin Li
- Department of Gastroenterology and Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Mengya Niu
- Department of Gastroenterology and Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zengkai Wu
- Department of Gastroenterology and Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Pengli Song
- Department of Gastroenterology and Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaoyu Guo
- Department of Gastroenterology and Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Sohail Z Husain
- Division of Pediatric Gastroenterology, Department of Pediatrics, Stanford University, Palo Alto, CA, United States
| | - Guoyong Hu
- Department of Gastroenterology and Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Liang Li
- Department of Gastroenterology and Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Li Wen
- Department of Gastroenterology and Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Peking Union Medical College Hospital, Chinese Academy of Medical Science & Peking Union Medical College, Beijing, China.
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Liu L, Yang C, Lavayen BP, Tishko RJ, Larochelle J, Candelario-Jalil E. Targeted BRD4 protein degradation by dBET1 ameliorates acute ischemic brain injury and improves functional outcomes associated with reduced neuroinflammation and oxidative stress and preservation of blood-brain barrier integrity. J Neuroinflammation 2022; 19:168. [PMID: 35761277 DOI: 10.1186/s12974-022-02533-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [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: 04/29/2022] [Accepted: 06/16/2022] [Indexed: 11/22/2022] Open
Abstract
Bromodomain-containing protein 4 (BRD4), a member of the bromodomain and extra-terminal domain (BET) protein family, plays a crucial role in regulating inflammation and oxidative stress that are tightly related to stroke development and progression. Consequently, BRD4 blockade has attracted increasing interest for associated neurological diseases, including stroke. dBET1 is a novel and effective BRD4 degrader through the proteolysis-targeting chimera (PROTAC) strategy. We hypothesized that dBET1 protects against brain damage and neurological deficits in a transient focal ischemic stroke mouse model by reducing inflammation and oxidative stress and preserving the blood–brain barrier (BBB) integrity. Post-ischemic dBET1 treatment starting 4 h after stroke onset significantly ameliorated severe neurological deficits and reduced infarct volume 48 h after stroke. dBET1 markedly reduced inflammation and oxidative stress after stroke, indicated by multiple pro-inflammatory cytokines and chemokines including IL-1β, IL-6, TNF-α, CCL2, CXCL1 and CXCL10, and oxidative damage markers 4-hydroxynonenal (4-HNE) and gp91phox and antioxidative proteins SOD2 and GPx1. Meanwhile, stroke-induced BBB disruption, increased MMP-9 levels, neutrophil infiltration, and increased ICAM-1 were significantly attenuated by dBET1 treatment. Post-ischemic dBET1 administration also attenuated ischemia-induced reactive gliosis in microglia and astrocytes. Overall, these findings demonstrate that BRD4 degradation by dBET1 improves acute stroke outcomes, which is associated with reduced neuroinflammation and oxidative stress and preservation of BBB integrity. This study identifies a novel role of BET proteins in the mechanisms resulting in ischemic brain damage, which can be leveraged to develop novel therapies.
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Cheng X, Yu P, Zhou X, Zhu J, Han Y, Zhang C, Kong L. Enhanced tumor homing of pathogen-mimicking liposomes driven by R848 stimulation: A new platform for synergistic oncology therapy. Acta Pharm Sin B 2022; 12:924-938. [PMID: 35256955 PMCID: PMC8897206 DOI: 10.1016/j.apsb.2021.08.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 04/09/2021] [Revised: 06/20/2021] [Accepted: 07/02/2021] [Indexed: 11/01/2022] Open
Abstract
Although multifarious tumor-targeting modifications of nanoparticulate systems have been attempted in joint efforts by our predecessors, it remains challenging for nanomedicine to traverse physiological barriers involving blood vessels, tissues, and cell barriers to thereafter demonstrate excellent antitumor effects. To further overcome these inherent obstacles, we designed and prepared mycoplasma membrane (MM)-fused liposomes (LPs) with the goal of employing circulating neutrophils with the advantage of inflammatory cytokine-guided autonomous tumor localization to transport nanoparticles. We also utilized in vivo neutrophil activation induced by the liposomal form of the immune activator resiquimod (LPs-R848). Fused LPs preparations retained mycoplasma pathogen characteristics and achieved rapid recognition and endocytosis by activated neutrophils stimulated by LPs-R848. The enhanced neutrophil infiltration in homing of the inflammatory tumor microenvironment allowed more nanoparticles to be delivered into solid tumors. Facilitated by the formation of neutrophil extracellular traps (NETs), podophyllotoxin (POD)-loaded MM-fused LPs (MM-LPs-POD) were concomitantly released from neutrophils and subsequently engulfed by tumor cells during inflammation. MM-LPs-POD displayed superior suppression efficacy of tumor growth and lung metastasis in a 4T1 breast tumor model. Overall, such a strategy of pathogen-mimicking nanoparticles hijacking neutrophils in situ combined with enhanced neutrophil infiltration indeed elevates the potential of chemotherapeutics for tumor targeting therapy.
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Imataki O, Yoshida S, Kaji T, Kida JI, Kubo H, Uemura M, Fujita H, Kadowaki N. Distinct Characteristics of Sweet's Syndrome of the Scrotum Caused by All- trans Retinoic Acid in a Patient with Acute Promyelocytic Leukemia. Case Rep Oncol 2021; 14:1466-1474. [PMID: 34899238 PMCID: PMC8613558 DOI: 10.1159/000516798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 04/14/2021] [Accepted: 04/22/2021] [Indexed: 11/19/2022] Open
Abstract
Induction therapy with all-trans retinoic acid (ATRA) is effective for acute promyelocytic leukemia (APL). ATRA induces neutrophil differentiation and its associated side effects. The differentiation syndrome is the most characterized ATRA-induced adverse effect. Sweet's syndrome, also known as neutrophilic dermatosis, is another form of ATRA-associated disease characterized by neutrophil infiltrating erythema that develops with fever. This is a case of a 34-year-old Japanese man diagnosed with APL. At the onset, the patient did not have skin involvement of APL cells. He was treated with ATRA and induction chemotherapy with idarubicin and cytarabine. Scrotal skin rash occurred at day 14, which developed into scrotal ulceration up to day 28 even after eliminating APL cells in his peripheral blood. Sweet's syndrome is a pathological diagnosis of scrotal skin ulceration representing neutrophil infiltration. The infiltrating neutrophils showed PML-RARα rearrangement. The patient was diagnosed with ATRA-associated Sweet's syndrome with skin ulcer. His cutaneous lesion did not respond to intravenous prednisolone therapy; thereby, ATRA was discontinued. After the cessation of ATRA, the skin lesion improved in the next week. We confirmed he achieved a complete response after induction chemotherapy. In our observation, ATRA-associated Sweet's syndrome is characterized by the following clinical manifestations: preferable occurrence in the scrota, tend to progress into skin ulcer, and pathogenicity associated with PML-RARα-positive matured neutrophils. The etiology, pathogenesis, and risk factors of ATRA-associated scrotal ulceration were discussed in the literature review.
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Affiliation(s)
- Osamu Imataki
- Division of Hematology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Shunsuke Yoshida
- Division of Hematology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Tomohiro Kaji
- Division of Hematology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Jun-Ichiro Kida
- Division of Hematology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Hiroyuki Kubo
- Division of Hematology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Makiko Uemura
- Division of Hematology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Haruyuki Fujita
- Division of Hematology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Norimitsu Kadowaki
- Division of Hematology, Faculty of Medicine, Kagawa University, Kagawa, Japan
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Mohammed S, Qadri SSY, Mir IA, Kondapalli NB, Basak S, Rajkumar H. Fructooligosaccharide ameliorates high-fat induced intrauterine inflammation and improves lipid profile in the hamster offspring. J Nutr Biochem 2021; 101:108925. [PMID: 34843933 DOI: 10.1016/j.jnutbio.2021.108925] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 10/26/2021] [Accepted: 11/16/2021] [Indexed: 01/10/2023]
Abstract
Maternal high-fat diet (HFD) often results in intrauterine and feto-placental inflammation, and increases the risks of fetal programming of metabolic diseases. Intake of prebiotic is reported beneficial. However, its effects on HFD during pregnancy and lactation is not known. We evaluated the maternal intake of fructooligosaccharide (FOS) and its impact on placental inflammation, offspring's adiposity, glucose, and lipid metabolism in their later life. Female Golden Syrian hamsters were fed with a control diet (CD, 26.4 % energy from fat) or HFD (60.7% energy from fat) in the presence or absence of FOS from preconception until lactation. All pups were switched over to CD after lactation and continued until the end. Placental inflammation was upregulated in HFD-fed dam, as measured by a high concentration of hsCRP in the serum and amniotic fluid. Neutrophil infiltration was significantly increased in the decidua through the chorionic layer of the placenta. The expression of pro-inflammatory cytokines such as COX2, NFκβ, IL-8, TGFβ mRNA was increased in the chorioamniotic membrane (P <.05). The HFD/CD hamsters had more adiposity, higher triglyceride, and low HDL at 12 months of age compared to CD/CD (P <.05). However, HFD+FOS/CD-fed hamsters prevented adverse effects such as placental inflammation, neutrophil infiltration, glucose, and lipid profiles in the offspring (P <.05). Anti-inflammatory and lipid-lowering effects of FOS may reduce placental inflammation by lowering neutrophil infiltration and decreasing the production of pro-inflammatory cytokines. Intake of FOS during pregnancy may be beneficial in maintaining lipid metabolism and preventing excess adiposity for mother and their offspring.
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Affiliation(s)
- Shujauddin Mohammed
- Department of Microbiology & Immunology, ICMR-National Institute of Nutrition, Indian Council of Medical Research, Hyderabad, Telengana, India
| | - Syed Shah Yousuf Qadri
- ICMR-National Animal Resource Facility for Biomedical Research, Hyderabad, Telengana, India
| | - Irfan Ahmad Mir
- ICMR-National Animal Resource Facility for Biomedical Research, Hyderabad, Telengana, India
| | - Narendra Babu Kondapalli
- Department of Microbiology & Immunology, ICMR-National Institute of Nutrition, Indian Council of Medical Research, Hyderabad, Telengana, India
| | - Sanjay Basak
- Molecular Biology Division, ICMR-National Institute of Nutrition, Indian Council of Medical Research, Hyderabad, Telengana, India.
| | - Hemalatha Rajkumar
- Department of Microbiology & Immunology, ICMR-National Institute of Nutrition, Indian Council of Medical Research, Hyderabad, Telengana, India.
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Tang X, Jing T, Chen X, Wang T, Xie Y, Chen F, Wen Y, Chang J, Chen D, Ma W. Interleukin-17 mediates inflammatory tissue injury during orf development in goats. Vet Microbiol 2021; 258:109105. [PMID: 33991787 DOI: 10.1016/j.vetmic.2021.109105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 12/01/2020] [Accepted: 05/06/2021] [Indexed: 01/13/2023]
Abstract
Orf is an epithelial zoonotic infectious disease caused by orf virus (ORFV). Mounting studies have shown that IL-17-driven neutrophil inflammation plays a central role in inflammatory skin diseases. However, whether IL-17 plays a similar role and how does it work in the pathogenesis of orf is unclear. In this study, we found that during orf development, numerous inflammatory cells, especially neutrophils, infiltrated in the damaged lip tissue. Meanwhile, the production of IL-17 was increased in the lesion site. Further evidence showed that IL-17 potently stimulated the production of several chemokines that are crucial for neutrophil migration. In addition, IL-17 was mostly produced by CD4+ T cells and gamma delta T (γδ T) cells of the skin. In conclusion, the present study highlighted a critical role of IL-17-driven inflammation in the pathogenesis of orf and suggested that this cytokine may be a potential therapeutic target of this disease in goats.
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Affiliation(s)
- Xidian Tang
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi Province, China
| | - Tian Jing
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi Province, China
| | - Xi Chen
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi Province, China
| | - Tianxing Wang
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi Province, China
| | - Yanfei Xie
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi Province, China
| | - Fengqiang Chen
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi Province, China
| | - Ying Wen
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, Qinghai Province, China; College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, Qinghai Province, China
| | - Jianjun Chang
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, Qinghai Province, China; College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, Qinghai Province, China
| | - Dekun Chen
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi Province, China.
| | - Wentao Ma
- Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi Province, China.
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Kong L, Ma Y, Wang Z, Liu N, Ma G, Liu C, Shi R, Du G. Inhibition of hypoxia inducible factor 1 by YC-1 attenuates tissue plasminogen activator induced hemorrhagic transformation by suppressing HMGB1/TLR4/NF-κB mediated neutrophil infiltration in thromboembolic stroke rats. Int Immunopharmacol 2021; 94:107507. [PMID: 33657523 DOI: 10.1016/j.intimp.2021.107507] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 11/09/2020] [Revised: 01/27/2021] [Accepted: 02/11/2021] [Indexed: 12/13/2022]
Abstract
Hemorrhagic transformation (HT) is a frequent complication of ischemic stroke after thrombolytic therapy and seriously affects the prognosis of stroke. Due to the limited therapeutic window and hemorrhagic complications, tissue plasminogen activator (t-PA) is underutilized in acute ischemic stroke. Currently, there are no clinically effective drugs to decrease the incidence of t-PA-induced HT. Hypoxia-inducible factor 1 (HIF-1) is an important transcription factor that maintains oxygen homeostasis and mediates neuroinflammation under hypoxia. However, the effect of HIF-1 on t-PA-induced HT is not clear. The aim of this study was to investigate the role of HIF-1 in t-PA-induced HT by applying YC-1, an inhibitor of HIF-1. In the present study, we found that HIF-1 expression was significantly increased in ischemic brain tissue after delayed t-PA treatment and was mainly localized in neurons and endothelial cells. Inhibition of HIF-1 by YC-1 improved infarct volume and neurological deficits. YC-1 inhibited matrix metalloproteinase protein expression, increased tight junction protein expression, and ameliorated BBB disruption and the occurrence of HT. Furthermore, YC-1 suppressed the release of inflammatory factors, neutrophil infiltration and the activation of the HMGB1/TLR4/NF-κB signaling pathway. These results demonstrated that inhibition of HIF-1 could protect BBB integrity by suppressing HMGB1/TLR4/NF-κB-mediated neutrophil infiltration, thereby reducing the risk of t-PA-induced HT. Thus, HIF-1 may be a potential therapeutic target for t-PA-induced HT.
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Affiliation(s)
- Linglei Kong
- Beijing Key Laboratory of Drug Targets Identification and Drug Screening, Centre for Pharmaceutical Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Yinzhong Ma
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Zhiyuan Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Nannan Liu
- Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Guodong Ma
- Beijing Key Laboratory of Drug Targets Identification and Drug Screening, Centre for Pharmaceutical Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Chengdi Liu
- Beijing Key Laboratory of Drug Targets Identification and Drug Screening, Centre for Pharmaceutical Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Ruili Shi
- Department of Physiology, Baotou Medical College, Baotou 014060, China.
| | - Guanhua Du
- Beijing Key Laboratory of Drug Targets Identification and Drug Screening, Centre for Pharmaceutical Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
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12
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Zhang S, Jin M, Zhou G, Zhang Y. Cerumen impaction was composed of abnormal exfoliation of keratinocytes that was correlated with infection. Am J Otolaryngol 2020; 41:102340. [PMID: 31735444 DOI: 10.1016/j.amjoto.2019.102340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 10/22/2019] [Revised: 11/04/2019] [Accepted: 11/06/2019] [Indexed: 01/03/2023]
Abstract
OBJECTIVE This study investigated the exact composition and tried to be helpful in explaining the etiologic mechanism of cerumen impaction in the external auditory canal (EAC). METHODS A hundred impacted cerumen samples and 15 normal cerumen samples were collected by manual removal and divided into 2 groups. All samples were examined via microbial culture, hematoxylin-eosin staining, periodic acid-Schiff staining, and fungal fluorescent staining. RESULTS Eighty-eight patients in group 1 were in the habit of using cotton buds. Forty-seven impacted cerumen samples tested positive for microbes, while only 1 sample of normal cerumen tested positive for microbes (p < .05). The most commonly isolated bacterium and fungus was Staphylococcus aureus and Aspergillus terreus respectively. All cerumen samples were composed of exfoliated keratinocytes and microorganisms assessed via pathologic examination. However, unlike normal cerumen, impacted cerumen contained nucleated keratinocytes and infiltrated neutrophils. Recurrent impaction was found only among patients who tested mold culture-positive. CONCLUSION Impacted cerumen is composed of abnormal exfoliated keratinocytes that was correlated with microbial-induced neutrophil-mediated inflammation. Mold infection is highly correlated with recurrent cerumen impaction. Microbial culture of removed impacted cerumen is strongly recommended. Ear cleaning with cotton buds, particularly when the EAC is wet might be one of the important causes of cerumen impaction which is need further studied. LEVEL OF EVIDENCE 2b.
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Affiliation(s)
- Shoude Zhang
- Department of Otolaryngology/Head and Neck, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 Qingchun East Road, Hangzhou 310000, China.
| | - Mao Jin
- Department of Otolaryngology/Head and Neck, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Guojin Zhou
- Department of Otolaryngology/Head and Neck, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Yuejiao Zhang
- Nursing Department, The Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
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Wan YM, Li ZQ, Zhou Q, Liu C, Wang MJ, Wu HX, Mu YZ, He YF, Zhang Y, Wu XN, Li YH, Xu ZY, Wu HM, Xu Y, Yang JH, Wang XF. Mesenchymal stem cells alleviate liver injury induced by chronic-binge ethanol feeding in mice via release of TSG6 and suppression of STAT3 activation. Stem Cell Res Ther 2020; 11:24. [PMID: 31931878 PMCID: PMC6958598 DOI: 10.1186/s13287-019-1547-8] [Citation(s) in RCA: 15] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 12/10/2019] [Accepted: 12/29/2019] [Indexed: 12/20/2022] Open
Abstract
Background Mesenchymal stem cells (MSCs) are a population of pluripotent cells that might be used for treatment of liver disease. However, the efficacy of MSCs for mice with alcoholic hepatitis (AH) and its underlying mechanism remains unclear. Methods MSCs were isolated from the bone marrow (BM) of 4–6-week-old male C57BL/6 N mice. AH was induced in female mice by chronic-binge ethanol feeding for 10 days. The mice were given intraperitoneal injections of MSCs with or without transfection or AG490, recombinant mouse tumor necrosis factor (TNF)-α-stimulated gene/protein 6 (rmTSG-6), or saline at day 10. Blood samples and hepatic tissues were collected at day 11. Various assays such as biochemistry, histology, and flow cytometry were performed. Results MSCs reduced AH in mice, decreasing liver/body weight ratio, liver injury, blood and hepatic lipids, malondialdehyde, interleukin (IL)-6, and TNF-ɑ, but increasing glutathione, IL-10, and TSG-6, compared to control mice. Few MSCs engrafted into the inflamed liver. Knockdown of TSG-6 in MSCs significantly attenuated their effects, and injection of rmTSG-6 achieved similar effects to MSCs. The signal transducer and activator of transcription 3 (STAT3) was activated in mice with AH, and MSCs and rmTSG-6 inhibited the STAT3 activation. Injection of MSCs plus AG490 obtained more alleviation of liver injury than MSCs alone. Conclusions BM-MSCs injected into mice with AH do not engraft the liver, but they secrete TSG-6 to reduce liver injury and to inhibit STAT3 activation.
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Affiliation(s)
- Yue-Meng Wan
- Gastroenterology Department, The 2nd Affiliated Hospital of Kunming Medical University, Kunming City, 650101, Yunnan Province, China.,Public Health Institute of Kunming Medical University, Kunming City, 650500, Yunnan Province, China
| | - Zhi-Qiang Li
- Public Health Institute of Kunming Medical University, Kunming City, 650500, Yunnan Province, China
| | - Qiong Zhou
- Public Health Institute of Kunming Medical University, Kunming City, 650500, Yunnan Province, China
| | - Chang Liu
- Public Health Institute of Kunming Medical University, Kunming City, 650500, Yunnan Province, China
| | - Men-Jie Wang
- Public Health Institute of Kunming Medical University, Kunming City, 650500, Yunnan Province, China
| | - Hui-Xin Wu
- Public Health Institute of Kunming Medical University, Kunming City, 650500, Yunnan Province, China
| | - Yun-Zhen Mu
- Public Health Institute of Kunming Medical University, Kunming City, 650500, Yunnan Province, China
| | - Yue-Feng He
- Public Health Institute of Kunming Medical University, Kunming City, 650500, Yunnan Province, China
| | - Yuan Zhang
- The Biomedical Engineering Research Center, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Xi-Nan Wu
- Public Health Institute of Kunming Medical University, Kunming City, 650500, Yunnan Province, China.
| | - Yu-Hua Li
- Gastroenterology Department, The 2nd Affiliated Hospital of Kunming Medical University, Kunming City, 650101, Yunnan Province, China
| | - Zhi-Yuan Xu
- Gastroenterology Department, The 2nd Affiliated Hospital of Kunming Medical University, Kunming City, 650101, Yunnan Province, China
| | - Hua-Mei Wu
- Gastroenterology Department, The 2nd Affiliated Hospital of Kunming Medical University, Kunming City, 650101, Yunnan Province, China
| | - Ying Xu
- Gastroenterology Department, The 2nd Affiliated Hospital of Kunming Medical University, Kunming City, 650101, Yunnan Province, China
| | - Jin-Hui Yang
- Gastroenterology Department, The 2nd Affiliated Hospital of Kunming Medical University, Kunming City, 650101, Yunnan Province, China
| | - Xiao-Fang Wang
- Department of Pathology, The 2nd Affiliated Hospital of Kunming Medical University, Kunming City, 65010, Yunnan Province, China
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Wicha P, Tocharus J, Janyou A, Jittiwat J, Chaichompoo W, Suksamrarn A, Tocharus C. Hexahydrocurcumin alleviated blood-brain barrier dysfunction in cerebral ischemia/reperfusion rats. Pharmacol Rep 2020; 72:659-671. [PMID: 32048258 DOI: 10.1007/s43440-019-00050-9] [Citation(s) in RCA: 14] [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] [Received: 07/21/2019] [Revised: 11/22/2019] [Accepted: 12/11/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND Hexahydrocurcumin (HHC), a major metabolite of curcumin, has been reported to have protective effects against ischemic and reperfusion damage. The goal of the present research was to examine whether HHC could alleviate brain damage and ameliorate functional outcomes by diminishing the blood-brain barrier (BBB) damage that follows cerebral ischemia/reperfusion. METHODS Middle cerebral artery occlusion was induced for 2 h in rats followed by reperfusion. The rats were divided into three groups: sham-operated, vehicle-treated, and HHC-treated groups. At the onset of reperfusion, the rats were immediately intraperitoneally injected with 40 mg/kg HHC. At 48 h after reperfusion, the rats were evaluated for neurological deficits and TTC staining. At 24 h and 48 h after reperfusion, animals were sacrificed, and their brains were extracted. RESULTS Treatment with HHC reduced neurological scores, infarct volume, morphological changes, Evans blue leakage and immunoglobulin G extravasation. Moreover, HHC treatment reduced BBB damage and neutrophil infiltration, downregulated myeloperoxidase, ICAM-1, and VCAM-1, upregulated tight junction proteins (TJPs), and reduced aquaporin 4 expression and brain water content. CONCLUSION These results revealed that HHC treatment preserved the BBB from cerebral ischemia/reperfusion injury by regulating TJPs, attenuating neutrophil infiltration, and reducing brain edema formation.
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Affiliation(s)
- Piyawadee Wicha
- Department of Anatomy, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Jiraporn Tocharus
- Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Adchara Janyou
- Department of Anatomy, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Jinatta Jittiwat
- Faculty of Medicine, Maha Sarakham University, Maha Sarakham, 44150, Thailand
| | - Waraluck Chaichompoo
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkok, 10240, Thailand
| | - Apichart Suksamrarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkok, 10240, Thailand
| | - Chainarong Tocharus
- Department of Anatomy, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand.
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15
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Endo M, Hori M, Ozaki H, Oikawa T, Odaguchi H, Hanawa T. Possible anti-inflammatory role of Zingiberis processum rhizoma, one component of the Kampo formula daikenchuto, against neutrophil infiltration through muscarinic acetylcholine receptor activation. J Pharmacol Sci 2018; 137:379-386. [PMID: 30145033 DOI: 10.1016/j.jphs.2018.08.001] [Citation(s) in RCA: 6] [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: 05/09/2018] [Revised: 07/23/2018] [Accepted: 07/26/2018] [Indexed: 12/17/2022] Open
Abstract
Zingiberis processum rhizoma (ZPR) is a major active component of daikenchuto (DKT), which induces anti-inflammatory action by inhibiting macrophage infiltration. However, it is unclear whether ZPR is related to DKT-induced anti-inflammatory action via a reduction of neutrophil infiltration against postoperative ileus (POI). In this study, we orally administered individual herbal components of DKT to mice four times before and after intestinal manipulation (IM). The anti-inflammatory action of each crude drug was evaluated by histochemical analysis of relevant molecules. The results showed that treatment with all herbal components of DKT significantly inhibits neutrophil infiltration. This inhibition of neutrophil infiltration by ZPR was significantly reduced in 5-hydroxytryptamine receptor 4 (5-HT4R) knockout (KO) mice but not in alpha-7 nicotinic acetylcholine receptor (α7nAChR) KO mice. Also, transient receptor potential ankyrin 1 (TRPA1) and muscarinic acetylcholine receptor (mAChR) antagonists partly and significantly inhibited the amelioration of neutrophil infiltration by ZPR. Therefore, DKT-induced anti-inflammatory action, mediated by inhibition of neutrophil infiltration in POI, depends, in part, on the effects of ZPR. ZPR activates TRPA1 channels, possibly in enterochromaffin (EC) cells, to release 5-HT. This 5-HT stimulates 5-HT4R in the myenteric plexus neurons to release acetylcholine, which, in turn, activates mAChR to inhibit inflammation in POI.
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Affiliation(s)
- Mari Endo
- Department of Clinical Research, Oriental Medicine Research Center, Kitasato University, Japan.
| | - Masatoshi Hori
- Department of Veterinary Pharmacology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Japan.
| | - Hiroshi Ozaki
- Department of Veterinary Pharmacology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Japan
| | - Tetsuro Oikawa
- Department of Clinical Research, Oriental Medicine Research Center, Kitasato University, Japan
| | - Hiroshi Odaguchi
- Department of Clinical Research, Oriental Medicine Research Center, Kitasato University, Japan
| | - Toshihiko Hanawa
- Department of Clinical Research, Oriental Medicine Research Center, Kitasato University, Japan; Department of Oriental Medicine Research, Research and Development Center for Medical Education, Kitasato University School of Medicine, Japan; Department of Oriental Medicine, Doctoral Program of Medical Science, Kitasato University Graduate School, Japan
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Abstract
BACKGROUND Serious and often fatal acute kidney injury (AKI) is frequently seen after major surgery, local and remote organ damage, and sepsis. It is associated with uncontrolled inflammation, and is usually diagnosed only after the kidneys have gone through significant and often irreversible damage. SUMMARY During our work involving another type of kidney disease that leads to acid-base disorders of the blood, we unexpectedly found high levels of a protein called the P2Y14 "purinergic" receptor, in specialized kidney epithelial cells called intercalated cells (ICs). These cells are responsible for maintaining whole body acid-base balance by regulating the secretion of excess protons into the urine, which normalizes blood pH. However, it turns out that the P2Y14 receptor in these cells responds to a molecule called uridine diphosphate (UDP)-glucose, which is a danger signal released by damaged cells anywhere in the body. When UDP-glucose reaches the kidney, it stimulates ICs to produce chemoattractant cytokines; this results in renal inflammation and contributes to the onset of AKI. Key Message: Thus, our work now points to ICs as key mediators of renal inflammation and AKI, following surgery and/or damage to remote organs, sepsis, and also local insults to the kidney itself. The link between the proton secreting ICs of the kidney and AKI is an example of how a fundamental research project with a defined aim, in this case understanding acid-base homeostasis, can lead to a novel observation that has unexpected but major implications in another area of human health.
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Cao K, Liao X, Lu J, Yao S, Wu F, Zhu X, Shi D, Wen S, Liu L, Zhou H. IL-33/ST2 plays a critical role in endothelial cell activation and microglia-mediated neuroinflammation modulation. J Neuroinflammation 2018; 15:136. [PMID: 29728120 PMCID: PMC5935936 DOI: 10.1186/s12974-018-1169-6] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [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: 01/20/2018] [Accepted: 04/19/2018] [Indexed: 12/11/2022] Open
Abstract
Background Interleukin-33 (IL-33) is increasingly being recognized as a key immunomodulatory cytokine in many neurological diseases. Methods In the present study, wild-type (WT) and IL-33−/− mice received intracerebroventricular (i.c.v.) injection of lipopolysaccharide (LPS) to induce neuroinflammation. Intravital microscopy was employed to examine leukocyte–endothelial interactions in the brain vasculature. The degree of neutrophil infiltration was determined by myeloperoxidase (MPO) staining. Real-time PCR and western blotting were used to detect endothelial activation. Enzyme-linked immunosorbent assay and quantitative PCR were conducted to detect pro-inflammatory cytokine levels in the brain. Results In IL-33−/− mice, neutrophil infiltration in the brain cortex and leukocyte–endothelial cell interactions in the cerebral microvessels were significantly decreased as compared to WT mice after LPS injection. In addition, IL-33−/− mice showed reduced activation of microglia and cerebral endothelial cells. In vitro results indicated that IL-33 directly activated cerebral endothelial cells and promoted pro-inflammatory cytokine production in LPS-stimulated microglia. Conclusions Our study indicated that IL-33/ST2 signaling plays an important role in the activation of microglia and cerebral endothelial cells and, therefore, is essential in leukocyte recruitment in brain inflammation. Graphical abstract The role of IL-33/ST2 in LPS induced neuroinflammation![]()
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Affiliation(s)
- Kelei Cao
- Department of Immunology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, JS, China
| | - Xiang Liao
- Department of Immunology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, JS, China
| | - Jiahui Lu
- Department of Immunology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, JS, China
| | - Shu Yao
- Department of Immunology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, JS, China
| | - Fengjiao Wu
- Department of Immunology, Anhui Provincial Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, 233030, China
| | - Xingxing Zhu
- Department of Immunology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, JS, China
| | - Dongyan Shi
- Department of Immunology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, JS, China
| | - Shuang Wen
- Department of Immunology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, JS, China
| | - Lixin Liu
- Department of Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E5, Canada
| | - Hong Zhou
- Department of Immunology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, JS, China.
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Zhao S, Yu Z, Liu Y, Bai Y, Jiang Y, van Leyen K, Yang YG, Lok JM, Whalen MJ, Lo EH, Wang X. CD47 deficiency improves neurological outcomes of traumatic brain injury in mice. Neurosci Lett 2016; 643:125-130. [PMID: 27931776 DOI: 10.1016/j.neulet.2016.12.006] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 12/02/2016] [Accepted: 12/03/2016] [Indexed: 10/20/2022]
Abstract
CD47 is a receptor for signal-regulatory protein alpha (SIRPα) in self-recognition by the innate immune system, and a receptor of thrombospondin-1 (TSP-1) contributing to vascular impairment in response to stress. However, the roles of CD47 in traumatic brain injury (TBI) have not been investigated. In this study we aimed to test our hypothesis that CD47 mediates early neutrophil brain infiltration and late brain vascular remodeling after TBI. Mice were subjected to TBI using a controlled cortical impact (CCI) device. We examined early phase neutrophil infiltration, and late phase brain vessel density, pro-angiogenic markers VEGF and Ang-1 protein expression, neurological function deficits and lesion volumes for up to three weeks after TBI. Our results show that mice deficient in CD47 (CD47 Knockout) had significantly less brain neutrophil infiltration at 24h, upregulated VEGF expression in peri-lesion cortex at 7 and 14days, and increased blood vessel density at 21days after TBI, compared to wild type (WT) mice. CD47 knockout also significantly decreased sensorimotor function deficits and reduced brain lesion volume at 21days after TBI. We conclude that CD47 may play pathological roles in brain neutrophil infiltration, progression of brain tissue damage, impairment of cerebrovascular remodeling and functional recovery after TBI.
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Affiliation(s)
- Song Zhao
- Departments of Orthopedic and Neurosurgery, The First Bethune Hospital of Jilin University, Changchun, Jilin, China; Neuroprotection Research Laboratory, Departments of Neurology and Radiology, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Room 2401, Charlestown, MA 02129, USA.
| | - Zhanyang Yu
- Neuroprotection Research Laboratory, Departments of Neurology and Radiology, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Room 2401, Charlestown, MA 02129, USA.
| | - Yu Liu
- Neuroprotection Research Laboratory, Departments of Neurology and Radiology, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Room 2401, Charlestown, MA 02129, USA; Department of Neurology, The Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang, China.
| | - Yang Bai
- Departments of Orthopedic and Neurosurgery, The First Bethune Hospital of Jilin University, Changchun, Jilin, China.
| | - Yinghua Jiang
- Neuroprotection Research Laboratory, Departments of Neurology and Radiology, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Room 2401, Charlestown, MA 02129, USA.
| | - Klaus van Leyen
- Neuroprotection Research Laboratory, Departments of Neurology and Radiology, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Room 2401, Charlestown, MA 02129, USA.
| | - Yong-Guang Yang
- Columbia Center for Translational Immunology, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, USA.
| | - Josephine M Lok
- Neuroprotection Research Laboratory, Departments of Neurology and Radiology, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Room 2401, Charlestown, MA 02129, USA; Department of Pediatrics, Pediatric Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.
| | - Michael J Whalen
- Department of Pediatrics, Pediatric Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.
| | - Eng H Lo
- Neuroprotection Research Laboratory, Departments of Neurology and Radiology, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Room 2401, Charlestown, MA 02129, USA.
| | - Xiaoying Wang
- Neuroprotection Research Laboratory, Departments of Neurology and Radiology, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Room 2401, Charlestown, MA 02129, USA.
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Xu XQ, Pu JB, Cao Q. Diagnostic value of neutrophil infiltration in Helicobacter pylori infection. Shijie Huaren Xiaohua Zazhi 2016; 24:2923-2926. [DOI: 10.11569/wcjd.v24.i18.2923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the value of neutrophil infiltration in the diagnosis of Helicobacter pylori (H. pylori) infection.
METHODS: From March 2015 to March 2016, 140 patients with dyspepsia symptoms who received upper gastrointestinal endoscopy were included in this study. The diagnosis of H. pylori infection was confirmed by13C-urea breath test (13C-UBT) as the gold standard. The value of neutrophil infiltration in the diagnosis of H. pylori infection was analyzed using Chi-square test.
RESULTS: The sensitivity, specificity, positive predication value (PPV) and negative predication value (NPV) of neutrophil infiltration in the diagnosis of H. pylori infection were 88.5%, 84.8%, 81.8%, and 90.5%, respectively. Neutrophil infiltration of gastric mucosa in histology analysis was strongly associated with H. pylori infection (P = 0.000), with moderate-severe neutrophil infiltration highly hinting H. pylori infection (P = 0.033).
CONCLUSION: Neutrophil infiltration is closely associated with H. pylori infection. The severer the degree of neutrophil infiltration, the higher the value for diagnosis of H. pylori infection.
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Solmaz A, Bahadır E, Gülçiçek OB, Yiğitbaş H, Çelik A, Karagöz A, Özsavcı D, Şirvancı S, Yeğen BÇ. Nesfatin-1 improves oxidative skin injury in normoglycemic or hyperglycemic rats. Peptides 2016; 78:1-10. [PMID: 26829459 DOI: 10.1016/j.peptides.2015.12.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 12/09/2015] [Accepted: 12/23/2015] [Indexed: 12/31/2022]
Abstract
Hyperglycemia is one of the major causes of suppressed angiogenesis and impaired wound healing leading to chronic wounds. Nesfatin-1 a novel peptide was reported to have antioxidant and anti-apoptotic properties. This study is aimed to investigate the potential healing-promoting effects of nesfatin-1 in non-diabetic or diabetic rats with surgical wounds. In male Sprague-Dawley rats, hyperglycemia was induced by intraperitoneal (ip) injection of streptozotocin (55 mg/kg). Under anesthesia, dorsum skin tissues of normoglycemic (n=16) and hyperglycemic rats were excised (2 × 2 cm, full-thickness), while control rats (n=16) had neither hyperglycemia nor wounds. Half of the rats in each group were treated ip with saline, while the others were treated with nesfatin-1 (2 μg/kg/day) for 3 days until they were decapitated. Plasma interleukin-1-beta (IL-1β), transforming growth factor-beta (TGF-β-1), IL-6 levels, and dermal tissue malondialdehyde (MDA), glutathione (GSH) levels, myeloperoxidase (MPO) and caspase-3 activity were measured. For histological examination, paraffin sections were stained with hematoxylin-eosin or Masson's trichrome and immunohistochemistry for vascular endothelial growth factor (VEGF) was applied. ANOVA and Student's t-tests were used for statistical analysis. Compared to control rats, skin MPO activity, MDA and caspase-3 levels were increased similarly in saline-treated normo- and hyperglycemic rats. Nesfatin-1 depressed MDA, caspase-3, MPO activity and IL-1β with concomitant elevations in dermal GSH and plasma TGF-β-1 levels. Histopathological examination revealed regeneration of epidermis, regular arrangement of collagen fibers in the dermis and a decrease in VEGF immunoreactivity in the epidermal keratinocytes of nesfatin-1-treated groups. Nesfatin-1 improved surgical wound healing in both normo- and hyperglycemic rats via the suppression of neutrophil recruitment, apoptosis and VEGF activation.
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Affiliation(s)
- Ali Solmaz
- General Surgery Clinic, Bağcılar Training and Research Hospital, Istanbul, Turkey
| | - Elif Bahadır
- Department of Physiology, Marmara University Faculty of Medicine, Istanbul, Turkey
| | - Osman B Gülçiçek
- General Surgery Clinic, Bağcılar Training and Research Hospital, Istanbul, Turkey
| | - Hakan Yiğitbaş
- General Surgery Clinic, Bağcılar Training and Research Hospital, Istanbul, Turkey
| | - Atilla Çelik
- General Surgery Clinic, Bağcılar Training and Research Hospital, Istanbul, Turkey
| | - Ayça Karagöz
- Department of Histology & Embryology, Marmara University Faculty of Medicine, Istanbul, Turkey
| | - Derya Özsavcı
- Department of Biochemistry, Marmara University Faculty of Pharmacy, Istanbul, Turkey
| | - Serap Şirvancı
- Department of Histology & Embryology, Marmara University Faculty of Medicine, Istanbul, Turkey
| | - Berrak Ç Yeğen
- Department of Physiology, Marmara University Faculty of Medicine, Istanbul, Turkey.
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Xian W, Wu Y, Xiong W, Li L, Li T, Pan S, Song L, Hu L, Pei L, Yao S, Shang Y. The pro-resolving lipid mediator Maresin 1 protects against cerebral ischemia/reperfusion injury by attenuating the pro-inflammatory response. Biochem Biophys Res Commun 2016; 472:175-81. [PMID: 26915798 DOI: 10.1016/j.bbrc.2016.02.090] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [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: 01/15/2016] [Accepted: 02/22/2016] [Indexed: 12/31/2022]
Abstract
Inflammation plays a crucial role in acute ischemic stroke pathogenesis. Macrophage-derived Maresin 1 (MaR1) is a newly uncovered mediator with potent anti-inflammatory abilities. Here, we investigated the effect of MaR1 on acute inflammation and neuroprotection in a mouse brain ischemia reperfusion (I/R) model. Male C57 mice were subjected to 1-h middle cerebral artery occlusion (MCAO) and reperfusion. By the methods of 2,3,5-triphenyltetrazolium chloride, haematoxylin and eosin or Fluoro-Jade B staining, neurological deficits scoring, ELISA detection, immunofluorescence assay and western blot analysis, we found that intracerebroventricular injection of MaR1 significantly reduced the infarct volume and neurological defects, essentially protected the brain tissue and neurons from injury, alleviated pro-inflammatory reactions and NF-κB p65 activation and nuclear translocation. Taken together, our results suggest that MaR1 significantly protects against I/R injury probably by inhibiting pro-inflammatory reactions.
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Affiliation(s)
- Wenjing Xian
- Department of Anesthesiology, Institute of Anesthesiology and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Wu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Xiong
- Department of Anesthesiology, Institute of Anesthesiology and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Longyan Li
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tong Li
- Department of Hepatobiliary Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shangwen Pan
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Limin Song
- Department of Anesthesiology, Institute of Anesthesiology and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lisha Hu
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lei Pei
- Department of Neurobiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shanglong Yao
- Department of Anesthesiology, Institute of Anesthesiology and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - You Shang
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Kaunisto A, Henry WS, Montaser-Kouhsari L, Jaminet SC, Oh EY, Zhao L, Luo HR, Beck AH, Toker A. NFAT1 promotes intratumoral neutrophil infiltration by regulating IL8 expression in breast cancer. Mol Oncol 2015; 9:1140-54. [PMID: 25735562 DOI: 10.1016/j.molonc.2015.02.004] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 02/09/2015] [Accepted: 02/10/2015] [Indexed: 12/26/2022] Open
Abstract
NFAT transcription factors are key regulators of gene expression in immune cells. In addition, NFAT1-induced genes play diverse roles in mediating the progression of various solid tumors. Here we show that NFAT1 induces the expression of the IL8 gene by binding to its promoter and leading to IL8 secretion. Thapsigargin stimulation of breast cancer cells induces IL8 expression in an NFAT-dependent manner. Moreover, we show that NFAT1-mediated IL8 production promotes the migration of primary human neutrophils in vitro and also promotes neutrophil infiltration in tumor xenografts. Furthermore, expression of active NFAT1 effectively suppresses the growth of nascent and established tumors by a non cell-autonomous mechanism. Evaluation of breast tumor tissue reveals that while the levels of NFAT1 are similar in tumor cells and normal breast epithelium, cells in the tumor stroma express higher levels of NFAT1 compared to normal stroma. Elevated levels of NFAT1 also correlate with increased neutrophil infiltrate in breast tumors. These data point to a mechanism by which NFAT1 orchestrates the communication between breast cancer cells and host neutrophils during breast cancer progression.
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Affiliation(s)
- Aura Kaunisto
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Whitney S Henry
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | | | - Shou-Ching Jaminet
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Eun-Yeong Oh
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Li Zhao
- Department of Laboratory Medicine, Children's Hospital Boston, Boston, MA, USA
| | - Hongbo R Luo
- Department of Laboratory Medicine, Children's Hospital Boston, Boston, MA, USA
| | - Andrew H Beck
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Alex Toker
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA, USA.
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Rahimi R, Baghaei A, Baeeri M, Amin G, Shams-Ardekani MR, Khanavi M, Abdollahi M. Promising effect of Magliasa, a traditional Iranian formula, on experimental colitis on the basis of biochemical and cellular findings. World J Gastroenterol 2013; 19:1901-11. [PMID: 23569335 PMCID: PMC3613105 DOI: 10.3748/wjg.v19.i12.1901] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Revised: 09/19/2012] [Accepted: 10/30/2012] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the efficacy of Magliasa, a traditional Iranian formula, on experimental colitis.
METHODS: After botanical authentication of herbal ingredients, formulation of Magliasa, quantitative determination of total glucosinolates and total phenolic content, and analysis of the thin layer chromatography profile were performed. Colitis was then induced in male rats by instillation of 2,4,6-trinitrobenzenesulfonic acid (TNBS) in all groups, aside from the Sham group. The experimental groups consisted of: the Sham group that received only normal saline; the Mag-50, Mag-100 and Mag-200 groups, which received 50, 100 and 200 mg/kg per day of Magliasa, respectively; the control group, which received vehicle water orally; the infliximab group, which received infliximab (5 mg/kg per day, subcutaneously); and the Dexa group, which received dexamethasone (1 mg/kg per day, orally). After completing the treatment period (2 wk), the rats were sacrificed, the colon was removed, its macroscopic and microscopic changes were recorded, and tumor necrosis factor-alpha (TNF-α), interleukin-1 beta (IL-1β), total antioxidant capacity, myeloperoxidase (MPO), and lipid peroxidation (LPO) were assessed in colon homogenate.
RESULTS: The mean value of total glucosinolates in one gram of Magliasa was 19 ± 1 μmol. The mean value of the total phenolic content was 293.8 ± 17.6 mg gallic acid equivalents per 100 gram of Magliasa. Macroscopic scores were significantly decreased in Mag-100 (1.80 ± 0.58, P = 0.019) and Mag-200 (1.20 ± 0.20, P = 0.001) compared to the control group (3.40 ± 0.24), although some inflammation and hyperemia were evident. Treatment of rats by dexamethasone (0.33 ± 0.21, P < 0.001) and infliximab (0.83 ± 0.31, P < 0.001) remarkably attenuated scores where mild hyperemia was observed macroscopically. In comparison to the control group (4.00 ± 0.32), only Mag-200 (1.60 ± 0.40) showed a significant decrease in colonic histopathological scores (P = 0.005). Minimal mucosal inflammation was observed in the Dexa group (0.67 ± 0.21, P < 0.001). The levels of TNF-α, IL-1β and MPO were significantly lower in all groups compared to the controls (P < 0.05). A significant decrease in LPO was seen in the Mag-200 (3.27 ± 0.77, P = 0.01) and Dexa (3.44 ± 0.22, P = 0.011) groups in comparison to the control group (6.43 ± 0.61). Only dexamethasone caused a significant increase in antioxidant power in comparison to the control group (346.73 ± 9.9 vs 228.33 ± 2.75, P < 0.001). Infliximab and different doses of Magliasa did not show any remarkable increase in antioxidant capacity (P > 0.05). The effect of Magliasa in all of mentioned parameters, except antioxidant capacity, was dose dependent.
CONCLUSION: The effects of Magliasa in TNBS-induced colitis are encouraging and warrant clinical trials for further confirmation.
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Khalatbary AR, Ahmadvand H. Effect of oleuropein on tissue myeloperoxidase activity in experimental spinal cord trauma. Iran Biomed J 2012; 15:164-7. [PMID: 22395142 DOI: 10.6091/ibj.1026.2012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND Neutrophil infiltration plays an important role in inflammatory reactions following spinal cord injury (SCI) and these cells cause substantial secondary tissue damage. The purpose of this study was to determine the effect of oleuropein (OE) on myeloperoxidase (MPO) activity as an index of neutrophil infiltration. METHODS Rats were randomly divided into four groups of 7 rats each as follows: sham-operated group, trauma group, and OE treatment groups (20 mg/kg, i.p., immediately and 1 hour after SCI). Spinal cord samples were taken 24 hours after injury and studied for determination of MPO activity. RESULTS The results showed that MPO activity was significantly decreased in OE-treated rats. CONCLUSION On the basis of our findings, we propose that OE may be effective in protecting rat spinal cord from secondary damage by modulating of neutrophil infiltration.
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Affiliation(s)
- Ali Reza Khalatbary
- Dept. of Anatomy, Faculty of Medicine, Mazandaran University of Medical Sciences, Khazar Boulevard, Sari, Iran
| | - Hassan Ahmadvand
- Dept. of Biochemistry, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
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Tian XF, Yao JH, Li YH, Zhang XS, Feng BA, Yang CM, Zheng SS. Effect of nuclear factor kappa B on intercellular adhesion molecule-1 expression and neutrophil infiltration in lung injury induced by intestinal ischemia/reperfusion in rats. World J Gastroenterol 2006; 12:388-92. [PMID: 16489637 PMCID: PMC4066056 DOI: 10.3748/wjg.v12.i3.388] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [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: 02/06/2023] Open
Abstract
AIM: To investigate the role of nuclear factor kappa B (NF-κB) in the pathogenesis of lung injury induced by intestinal ischemia/reperfusion (I/R), and its effect on intercellular adhesion molecule-1 (ICAM-1) expression and neutrophil infiltration.
METHODS: Twenty-four Wistar rats were divided randomly into control, I/R and pyrrolidine dithiocarbamate (PDTC) treatment groups, n = 8 in each. I/R group and PDTC treatment group received superior mysenteric artery (SMA) occluding for 1 h and reperfusion for 2 h. PDTC group was administrated with intraperitoneal injection of 2% 100 mg/kg PDTC 1 h before surgery. Lung histology and bronchia alveolus lung fluid (BALF) protein were assayed. Serum IL-6, lung malondialdehyde (MDA) and myeloperoxidase (MPO) as well as the expression level of NF-κB and ICAM-1 were measured.
RESULTS: Lung injury induced by intestinal I/R, was characterized by edema, hemorrhage and neutrophil infiltration as well as by the significant rising of BALF protein. Compared to control group, the levels of serum IL-6 and lung MDA and MPO increased significantly in I/R group (P = 0.001). Strong positive expression of NF-κB p65 and ICAM-1 was observed. After the administration of PDTC, the level of serum IL-6, lung MDA and MPO as well as NF-κB and ICAM-1 decreased significantly (P < 0.05) when compared to I/R group.
CONCLUSION: The activation of NF-κB plays an important role in the pathogenesis of lung injury induced by intestinal I/R through upregulating the neutrophil infiltration and lung ICAM-1 expression. PDTC as an inhibitor of NF-κB can prevent lung injury induced by intestinal I/R through inhibiting the activity of NF-κB.
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Affiliation(s)
- Xiao-Feng Tian
- Department of General Surgery, Second Affiliated Hospital, Dalian Medical University, Dalian 116027, Liaoning Province, China.
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