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Volkmann ER, Denton CP, Kolb M, Wijsenbeek-Lourens MS, Emson C, Hudson K, Amatucci AJ, Distler O, Allanore Y, Khanna D. Lysophosphatidic acid receptor 1 inhibition: a potential treatment target for pulmonary fibrosis. Eur Respir Rev 2024; 33:240015. [PMID: 39009409 PMCID: PMC11262619 DOI: 10.1183/16000617.0015-2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 04/01/2024] [Indexed: 07/17/2024] Open
Abstract
Lysophosphatidic acid (LPA)-mediated activation of LPA receptor 1 (LPAR1) contributes to the pathophysiology of fibrotic diseases such as idiopathic pulmonary fibrosis (IPF) and systemic sclerosis (SSc). These diseases are associated with high morbidity and mortality despite current treatment options. The LPA-producing enzyme autotaxin (ATX) and LPAR1 activation contribute to inflammation and mechanisms underlying fibrosis in preclinical fibrotic models. Additionally, elevated levels of LPA have been detected in bronchoalveolar lavage fluid from patients with IPF and in serum from patients with SSc. Thus, ATX and LPAR1 have gained considerable interest as pharmaceutical targets to combat fibrotic disease and inhibitors of these targets have been investigated in clinical trials for IPF and SSc. The goals of this review are to summarise the current literature on ATX and LPAR1 signalling in pulmonary fibrosis and to help differentiate the novel inhibitors in development. The mechanisms of action of ATX and LPAR1 inhibitors are described and preclinical studies and clinical trials of these agents are outlined. Because of their contribution to numerous physiologic events underlying fibrotic disease, ATX and LPAR1 inhibition presents a promising therapeutic strategy for IPF, SSc and other fibrotic diseases that may fulfil unmet needs of the current standard of care.
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Affiliation(s)
- Elizabeth R Volkmann
- Department of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | | | - Martin Kolb
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | | | - Claire Emson
- Translational Medicine, Horizon Therapeutics (now Amgen, Inc.), Rockville, MD, USA
| | - Krischan Hudson
- Clinical Development, Horizon Therapeutics (now Amgen, Inc.), Deerfield, IL, USA
| | - Anthony J Amatucci
- Global Medical Affairs, Horizon Therapeutics (now Amgen, Inc), Deerfield, IL, USA
| | - Oliver Distler
- Department of Rheumatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Yannick Allanore
- Rheumatology Department, Cochin Hospital APHP, INSERM U1016, Université Paris Cité, Paris, France
| | - Dinesh Khanna
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
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2
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Jiang S, Yang H, Li M. Emerging Roles of Lysophosphatidic Acid in Macrophages and Inflammatory Diseases. Int J Mol Sci 2023; 24:12524. [PMID: 37569902 PMCID: PMC10419859 DOI: 10.3390/ijms241512524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/02/2023] [Accepted: 08/04/2023] [Indexed: 08/13/2023] Open
Abstract
Lysophosphatidic acid (LPA) is a bioactive phospholipid that regulates physiological and pathological processes in numerous cell biological functions, including cell migration, apoptosis, and proliferation. Macrophages are found in most human tissues and have multiple physiological and pathological functions. There is growing evidence that LPA signaling plays a significant role in the physiological function of macrophages and accelerates the development of diseases caused by macrophage dysfunction and inflammation, such as inflammation-related diseases, cancer, atherosclerosis, and fibrosis. In this review, we summarize the roles of LPA in macrophages, analyze numerous macrophage- and inflammation-associated diseases triggered by LPA, and discuss LPA-targeting therapeutic strategies.
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Affiliation(s)
- Shufan Jiang
- Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200080, China;
- Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Huili Yang
- Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200080, China;
| | - Mingqing Li
- Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200080, China;
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200080, China
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3
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Kleuser B, Bäumer W. Sphingosine 1-Phosphate as Essential Signaling Molecule in Inflammatory Skin Diseases. Int J Mol Sci 2023; 24:ijms24021456. [PMID: 36674974 PMCID: PMC9863039 DOI: 10.3390/ijms24021456] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/04/2023] [Accepted: 01/06/2023] [Indexed: 01/13/2023] Open
Abstract
Sphingolipids are crucial molecules of the mammalian epidermis. The formation of skin-specific ceramides contributes to the formation of lipid lamellae, which are important for the protection of the epidermis from excessive water loss and protect the skin from the invasion of pathogens and the penetration of xenobiotics. In addition to being structural constituents of the epidermal layer, sphingolipids are also key signaling molecules that participate in the regulation of epidermal cells and the immune cells of the skin. While the importance of ceramides with regard to the proliferation and differentiation of skin cells has been known for a long time, it has emerged in recent years that the sphingolipid sphingosine 1-phosphate (S1P) is also involved in processes such as the proliferation and differentiation of keratinocytes. In addition, the immunomodulatory role of this sphingolipid species is becoming increasingly apparent. This is significant as S1P mediates a variety of its actions via G-protein coupled receptors. It is, therefore, not surprising that dysregulation in the signaling pathways of S1P is involved in the pathophysiological conditions of skin diseases. In the present review, the importance of S1P in skin cells, as well as the immune cells of the skin, is elaborated. In particular, the role of the molecule in inflammatory skin diseases will be discussed. This is important because interfering with S1P signaling pathways may represent an innovative option for the treatment of inflammatory skin diseases.
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Affiliation(s)
- Burkhard Kleuser
- Department of Pharmacology and Toxicology, Institute of Pharmacy, Freie Universität Berlin, Königin-Luise Str. 2+4, 14195 Berlin, Germany
- Correspondence: (B.K.); (W.B.)
| | - Wolfgang Bäumer
- Department of Veterinary Medicine, Institute of Pharmacology and Toxicology, Freie Universität Berlin, Koserstr. 20, 14195 Berlin, Germany
- Correspondence: (B.K.); (W.B.)
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4
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Tourkochristou E, Mouzaki A, Triantos C. Unveiling the biological role of sphingosine-1-phosphate receptor modulators in inflammatory bowel diseases. World J Gastroenterol 2023; 29:110-125. [PMID: 36683721 PMCID: PMC9850947 DOI: 10.3748/wjg.v29.i1.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/16/2022] [Accepted: 12/14/2022] [Indexed: 01/04/2023] Open
Abstract
Inflammatory bowel disease (IBD) is chronic inflammation of the gastrointestinal tract that has a high epidemiological prevalence worldwide. The increasing disease burden worldwide, lack of response to current biologic therapeutics, and treatment-related immunogenicity have led to major concerns regarding the clinical management of IBD patients and treatment efficacy. Understanding disease pathogenesis and disease-related molecular mechanisms is the most important goal in developing new and effective therapeutics. Sphingosine-1-phosphate (S1P) receptor (S1PR) modulators form a class of oral small molecule drugs currently in clinical development for IBD have shown promising effects on disease improvement. S1P is a sphingosine-derived phospholipid that acts by binding to its receptor S1PR and is involved in the regulation of several biological processes including cell survival, differentiation, migration, proliferation, immune response, and lymphocyte trafficking. T lymphocytes play an important role in regulating inflammatory responses. In inflamed IBD tissue, an imbalance between T helper (Th) and regulatory T lymphocytes and Th cytokine levels was found. The S1P/S1PR signaling axis and metabolism have been linked to inflammatory responses in IBD. S1P modulators targeting S1PRs and S1P metabolism have been developed and shown to regulate inflammatory responses by affecting lymphocyte trafficking, lymphocyte number, lymphocyte activity, cytokine production, and contributing to gut barrier function.
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Affiliation(s)
- Evanthia Tourkochristou
- Division of Gastroenterology, Department of Internal Medicine, Medical School, University of Patras, Patras 26504, Greece
| | - Athanasia Mouzaki
- Division of Hematology, Department of Internal Medicine, Medical School, University of Patras, Patras 26504, Greece
| | - Christos Triantos
- Division of Gastroenterology, Department of Internal Medicine, Medical School, University of Patras, Patras 26504, Greece
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5
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Sphingosine 1-phosphate modulation and immune cell trafficking in inflammatory bowel disease. Nat Rev Gastroenterol Hepatol 2022; 19:351-366. [PMID: 35165437 DOI: 10.1038/s41575-021-00574-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/22/2021] [Indexed: 12/12/2022]
Abstract
Immune cell trafficking is a critical element of the intestinal immune response, both in homeostasis and in pathological conditions associated with inflammatory bowel disease (IBD). This process involves adhesion molecules, chemoattractants and receptors expressed on immune cell surfaces, blood vessels and stromal intestinal tissue as well as signalling pathways, including those modulated by sphingosine 1-phosphate (S1P). The complex biological processes of leukocyte recruitment, activation, adhesion and migration have been targeted by various monoclonal antibodies (vedolizumab, etrolizumab, ontamalimab). Promising preclinical and clinical data with several oral S1P modulators suggest that inhibition of lymphocyte egress from the lymph nodes to the bloodstream might be a safe and efficacious alternative mechanism for reducing inflammation in immune-mediated disorders, including Crohn's disease and ulcerative colitis. Although various questions remain, including the potential positioning of S1P modulators in treatment algorithms and their long-term safety, this novel class of compounds holds great promise. This Review summarizes the critical mediators and mechanisms involved in immune cell trafficking in IBD and the available evidence for efficacy, safety and pharmacokinetics of S1P receptor modulators in IBD and other immune-mediated disorders. Further, it discusses potential future approaches to incorporate S1P modulators into the treatment of IBD.
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Sphingosine 1-Phosphate Receptor 5 (S1P5) Knockout Ameliorates Adenine-Induced Nephropathy. Int J Mol Sci 2022; 23:ijms23073952. [PMID: 35409312 PMCID: PMC8999641 DOI: 10.3390/ijms23073952] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/23/2022] [Accepted: 03/26/2022] [Indexed: 02/04/2023] Open
Abstract
S1P and its receptors have been reported to play important roles in the development of renal fibrosis. Although S1P5 has barely been investigated so far, there are indications that it can influence inflammatory and fibrotic processes. Here, we report the role of S1P5 in renal inflammation and fibrosis. Male S1P5 knockout mice and wild-type mice on a C57BL/6J background were fed with an adenine-rich diet for 7 days or 14 days to induce tubulointerstitial fibrosis. The kidneys of untreated mice served as respective controls. Kidney damage, fibrosis, and inflammation in kidney tissues were analyzed by real-time PCR, Western blot, and histological staining. Renal function was assessed by plasma creatinine ELISA. The S1P5 knockout mice had better renal function and showed less kidney damage, less proinflammatory cytokine release, and less fibrosis after 7 days and 14 days of an adenine-rich diet compared to wild-type mice. S1P5 knockout ameliorates tubular damage and tubulointerstitial fibrosis in a model of adenine-induced nephropathy in mice. Thus, targeting S1P5 might be a promising goal for the pharmacological treatment of kidney diseases.
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Liu J, Huang L, Shi X, Gu C, Xu H, Liu S. Clinical Parameters and Metabolomic Biomarkers That Predict Inhospital Outcomes in Patients With ST-Segment Elevated Myocardial Infarctions. Front Physiol 2022; 12:820240. [PMID: 35211029 PMCID: PMC8862746 DOI: 10.3389/fphys.2021.820240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 12/31/2021] [Indexed: 11/29/2022] Open
Abstract
Background Postoperative risk stratification is challenging in patients with ST-segment elevation myocardial infarction (STEMI) who undergo percutaneous coronary intervention. This study aimed to characterize the metabolic fingerprints of patients with STEMI with different inhospital outcomes in the early stage of morbidity and to integrate the clinical baseline characteristics to develop a prognostic prediction model. Methods Plasma samples were collected retrospectively from two propensity score-matched STEMI cohorts from May 6, 2020 to April 20, 2021. Cohort 1 consisted of 48 survivors and 48 non-survivors. Cohort 2 included 48 patients with unstable angina pectoris, 48 patients with STEMI, and 48 age- and sex-matched healthy controls. Metabolic profiling was generated based on ultra-performance liquid chromatography and a mass spectrometry platform. The comprehensive metabolomic data analysis was performed using MetaboAnalyst version 5.0. The hub metabolite biomarkers integrated into the model were tested using multivariate linear support vector machine (SVM) algorithms and a generalized estimating equation (GEE) model. Their predictive capabilities were evaluated using areas under the curve (AUCs) of receiver operating characteristic curves. Results Metabonomic analysis from the two cohorts showed that patients with STEMI with different outcomes had significantly different clusters. Seven differentially expressed metabolites were identified as potential candidates for predicting inhospital outcomes based on the two cohorts, and their joint discriminative capabilities were robust using SVM (AUC = 0.998, 95% CI 0.983–1) and the univariate GEE model (AUC = 0.981, 95% CI 0.969–0.994). After integrating another six clinical variants, the predictive performance of the updated model improved further (AUC = 0.99, 95% CI 0.981–0.998). Conclusion A survival prediction model integrating seven metabolites from non-targeted metabonomics and six clinical indicators may generate a powerful early survival prediction model for patients with STEMI. The validation of internal and external cohorts is required.
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Affiliation(s)
- Jie Liu
- Clinical Laboratory Department, The Third Central Hospital of Tianjin, Tianjin, China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China.,Artificial Cell Engineering Technology Research Center, Tianjin, China.,Tianjin Institute of Hepatobiliary Disease, Tianjin, China
| | - Lei Huang
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China.,Artificial Cell Engineering Technology Research Center, Tianjin, China.,Tianjin Institute of Hepatobiliary Disease, Tianjin, China.,Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
| | - Xinrong Shi
- Clinical Laboratory Department, The Third Central Hospital of Tianjin, Tianjin, China
| | - Chungang Gu
- Clinical Laboratory Department, The Third Central Hospital of Tianjin, Tianjin, China
| | - Hongmin Xu
- Clinical Laboratory Department, The Third Central Hospital of Tianjin, Tianjin, China
| | - Shuye Liu
- Clinical Laboratory Department, The Third Central Hospital of Tianjin, Tianjin, China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China.,Artificial Cell Engineering Technology Research Center, Tianjin, China.,Tianjin Institute of Hepatobiliary Disease, Tianjin, China
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8
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Huang M, Zhang X, Yan W, Liu J, Wang H. Metabolomics reveals potential plateau adaptability by regulating
inflammatory response and oxidative stress-related metabolism and energy
metabolism pathways in yak. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2021; 64:97-109. [PMID: 35174345 PMCID: PMC8819316 DOI: 10.5187/jast.2021.e129] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/14/2021] [Accepted: 11/30/2021] [Indexed: 11/23/2022]
Abstract
Species are facing strong selection pressures to adapt to inhospitable
high-altitude environments. Yaks are a valuable species and an iconic symbol of
the Qinghai-Tibet Plateau. Extensive studies of high-altitude adaptation have
been conducted, but few have focused on metabolism. In the present study, we
determined the differences in the serum metabolomics between yaks and the
closely related species of low-altitude yellow cattle and dairy cows. We
generated high-quality metabolite profiling data for 36 samples derived from the
three species, and a clear separation trend was obtained between yaks and the
other animals from principal component analysis. In addition, we identified a
total of 63 differentially expressed metabolites among the three species.
Functional analysis revealed that differentially expressed metabolites were
related to the innate immune activation, oxidative stress-related metabolism,
and energy metabolism in yaks, which indicates the important roles of
metabolites in high-altitude adaptation in yaks. The results provide new
insights into the mechanism of adaptation or acclimatization to high-altitude
environments in yaks and hypoxia-related diseases in humans.
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Affiliation(s)
- Meizhou Huang
- Department of Toxicology, School of Public
Health, Lanzhou University, Gansu 730000, China
- Academician (Expert) Workstation of
Sichuan Province, The Affiliated Hospital of Southwest Medical
University, Sichuan 646000, China
| | - Xin Zhang
- Department of Toxicology, School of Public
Health, Lanzhou University, Gansu 730000, China
| | - Wenjun Yan
- Agricultural and Rural Integrated Service
Center of Dachaigou Town, Tianzhu Tibetan Autonomous County,
Gansu 733202, China
| | - Jingjing Liu
- Department of Toxicology, School of Public
Health, Lanzhou University, Gansu 730000, China
| | - Hui Wang
- Department of Toxicology, School of Public
Health, Lanzhou University, Gansu 730000, China
- Corresponding author: Hui Wang, Department of
Toxicology, School of Public Health, Lanzhou University, Gansu 730000, China.
Tel: +86-13919330832, E-mail:
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Abstract
PURPOSE OF REVIEW This study reviews the mechanisms of HDL cholesterol immunomodulation in the context of the mechanisms of chronic inflammation and immunosuppression causing persistent inflammation, immunosuppression and catabolism syndrome (PICS) and describes potential therapies and gaps in current research. RECENT FINDINGS Low HDL cholesterol is predictive of acute sepsis severity and outcome. Recent research has indicated apolipoprotein is a prognostic indicator of long-term outcomes. The pathobiologic mechanisms of PICS have been elucidated in the past several years. Recent research of the interaction of HDL pathways in related chronic inflammatory diseases may provide insights into further mechanisms and therapeutic targets. SUMMARY HDL significantly influences innate and adaptive immune pathways relating to chronic disease and inflammation. Further research is needed to better characterize these interactions in the setting of PICS.
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Affiliation(s)
- Grant Barker
- Department of Emergency Medicine, University of Florida College of Medicine, Jacksonville
| | - Julia R Winer
- University of Florida College of Medicine, Gainesville, Florida
| | - Faheem W Guirgis
- Department of Emergency Medicine, University of Florida College of Medicine, Jacksonville
| | - Srinivasa Reddy
- Department of Molecular and Medical Pharmacology, University of California, Los Angeles, California, USA
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10
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Hutami IR, Izawa T, Khurel-Ochir T, Sakamaki T, Iwasa A, Tanaka E. Macrophage Motility in Wound Healing Is Regulated by HIF-1α via S1P Signaling. Int J Mol Sci 2021; 22:ijms22168992. [PMID: 34445695 PMCID: PMC8396560 DOI: 10.3390/ijms22168992] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/14/2021] [Accepted: 08/18/2021] [Indexed: 12/20/2022] Open
Abstract
Accumulating evidence indicates that the molecular pathways mediating wound healing induce cell migration and localization of cytokines to sites of injury. Macrophages are immune cells that sense and actively respond to disturbances in tissue homeostasis by initiating, and subsequently resolving, inflammation. Hypoxic conditions generated at a wound site also strongly recruit macrophages and affect their function. Hypoxia inducible factor (HIF)-1α is a transcription factor that contributes to both glycolysis and the induction of inflammatory genes, while also being critical for macrophage activation. For the latter, HIF-1α regulates sphingosine 1-phosphate (S1P) to affect the migration, activation, differentiation, and polarization of macrophages. Recently, S1P and HIF-1α have received much attention, and various studies have been performed to investigate their roles in initiating and resolving inflammation via macrophages. It is hypothesized that the HIF-1α/S1P/S1P receptor axis is an important determinant of macrophage function under inflammatory conditions and during disease pathogenesis. Therefore, in this review, biological regulation of monocytes/macrophages in response to circulating HIF-1α is summarized, including signaling by S1P/S1P receptors, which have essential roles in wound healing.
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Affiliation(s)
- Islamy Rahma Hutami
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan; (I.R.H.); (T.K.-O.); (T.S.); (A.I.); (E.T.)
- Department of Orthodontics, Faculty of Dentistry, Sultan Agung Islamic University, Semarang 50112, Indonesia
| | - Takashi Izawa
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan; (I.R.H.); (T.K.-O.); (T.S.); (A.I.); (E.T.)
- Department of Orthodontics, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8525, Japan
- Correspondence: ; Tel.: +81-86-235-6691; Fax: +81-88-235-6694
| | - Tsendsuren Khurel-Ochir
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan; (I.R.H.); (T.K.-O.); (T.S.); (A.I.); (E.T.)
| | - Takuma Sakamaki
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan; (I.R.H.); (T.K.-O.); (T.S.); (A.I.); (E.T.)
| | - Akihiko Iwasa
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan; (I.R.H.); (T.K.-O.); (T.S.); (A.I.); (E.T.)
| | - Eiji Tanaka
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8504, Japan; (I.R.H.); (T.K.-O.); (T.S.); (A.I.); (E.T.)
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11
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Qian D, Liu H, Zhao L, Wang X, Luo S, Moorman PG, Patz EF, Su L, Shen S, Christiani DC, Wei Q. Novel genetic variants in genes of the Fc gamma receptor-mediated phagocytosis pathway predict non-small cell lung cancer survival. Transl Lung Cancer Res 2020; 9:575-586. [PMID: 32676321 PMCID: PMC7354140 DOI: 10.21037/tlcr-19-318] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Background Both antibody-dependent cellular cytotoxicity and phagocytosis activate innate immunity, and the Fc gamma receptor (FCGR)-mediated phagocytosis is an integral part of the process. We assessed associations between single-nucleotide polymorphisms (SNPs) in FCGR-related genes and survival of patients with non-small cell lung cancer (NSCLC). Methods We evaluated associations between 24,734 (SNPs) in 97 FCGR-related genes and survival of 1,185 patients with NSCLC using a published genome-wide association study (GWAS) dataset from the Prostate, Lung, Colorectal and Ovarian (PLCO) Cancer Screening Trial and validated the results in another independent dataset of 894 NSCLC patients. Results In the single-locus analysis with Bayesian false discovery probability (BFDP) for multiple testing correction, we found 1,084 SNPs to be significantly associated overall survival (OS) (P<0.050 and BFDP ≤0.80), of which two independent SNPs (PLCG2 rs9673682 T>G and PLPP1 rs115613985 T>A) were further validated in another GWAS dataset of 894 patients from the Harvard Lung Cancer Susceptibility (HLCS) Study, with combined allelic hazards ratios for OS of 0.87 [95% confidence interval (CI): 0.81-0.94 and P=5.90×10-4] and 1.18 (95% CI: 1.08-1.29 and 1.32×10-4, respectively). Expression quantitative trait loci analysis showed that the rs9673682 G allele was significantly correlated with increased mRNA expression levels of PLCG2 in 373 transformed lymphoblastoid cell-lines (P=7.20×10-5). Additional evidence from differential expression analysis further supported a tumor-suppressive effect of PLCG2 on OS of patients with lung cancer, with lower mRNA expression levels in both lung squamous carcinoma and adenocarcinoma than in adjacent normal tissues. Conclusions Genetic variants in PLCG2 of the FCGR-mediated phagocytosis pathway may be promising predictors of NSCLC survival, possibly through modulating gene expression, but additional investigation of the molecular mechanisms of PLPP1 rs115613985 is warranted.
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Affiliation(s)
- Danwen Qian
- Cancer Institute, Fudan University Shanghai Cancer Center; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China.,Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA.,Department of Population Health Sciences, Duke University School of Medicine, Durham, NC, USA
| | - Hongliang Liu
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA.,Department of Population Health Sciences, Duke University School of Medicine, Durham, NC, USA
| | - Lingling Zhao
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA.,Department of Population Health Sciences, Duke University School of Medicine, Durham, NC, USA
| | - Xiaomeng Wang
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA.,Department of Population Health Sciences, Duke University School of Medicine, Durham, NC, USA
| | - Sheng Luo
- Department of Biostatistics and Bioinformatics, Duke University School of Medicine, Durham, NC, USA
| | - Patricia G Moorman
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA.,Department of Family Medicine and Community Health, Duke University School of Medicine, Durham, NC, USA
| | - Edward F Patz
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA.,Department of Radiology, Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC, USA
| | - Li Su
- Department of Environmental Health and Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA
| | - Sipeng Shen
- Department of Environmental Health and Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA
| | - David C Christiani
- Department of Environmental Health and Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA.,Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Qingyi Wei
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA.,Department of Population Health Sciences, Duke University School of Medicine, Durham, NC, USA.,Department of Medicine, Duke University School of Medicine, Durham, NC, USA
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12
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Sukocheva OA, Furuya H, Ng ML, Friedemann M, Menschikowski M, Tarasov VV, Chubarev VN, Klochkov SG, Neganova ME, Mangoni AA, Aliev G, Bishayee A. Sphingosine kinase and sphingosine-1-phosphate receptor signaling pathway in inflammatory gastrointestinal disease and cancers: A novel therapeutic target. Pharmacol Ther 2020; 207:107464. [PMID: 31863815 DOI: 10.1016/j.pharmthera.2019.107464] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 12/10/2019] [Indexed: 02/07/2023]
Abstract
Inflammatory gastrointestinal (GI) diseases and malignancies are associated with growing morbidity and cancer-related mortality worldwide. GI tumor and inflammatory cells contain activated sphingolipid-metabolizing enzymes, including sphingosine kinase 1 (SphK1) and SphK2, that generate sphingosine-1-phosphate (S1P), a highly bioactive compound. Many inflammatory responses, including lymphocyte trafficking, are directed by circulatory S1P, present in high concentrations in both the plasma and the lymph of cancer patients. High fat and sugar diet, disbalanced intestinal flora, and obesity have recently been linked to activation of inflammation and SphK/S1P/S1P receptor (S1PR) signaling in various GI pathologies, including cancer. SphK1 overexpression and activation facilitate and enhance the development and progression of esophageal, gastric, and colon cancers. SphK/S1P axis, a mediator of inflammation in the tumor microenvironment, has recently been defined as a target for the treatment of GI disease states, including inflammatory bowel disease and colitis. Several SphK1 inhibitors and S1PR antagonists have been developed as novel anti-inflammatory and anticancer agents. In this review, we analyze the mechanisms of SphK/S1P signaling in GI tissues and critically appraise recent studies on the role of SphK/S1P/S1PR in inflammatory GI disorders and cancers. The potential role of SphK/S1PR inhibitors in the prevention and treatment of inflammation-mediated GI diseases, including GI cancer, is also evaluated.
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Affiliation(s)
- Olga A Sukocheva
- Discipline of Health Sciences, College of Nursing and Health Sciences, Flinders University, Bedford Park, South Australia 5042, Australia
| | - Hideki Furuya
- Department of Surgery, Samuel Oschin Cancer Center Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Mei Li Ng
- Advanced Medical and Dental Institute, University Sains 13200 Kepala Batas, Pulau Pinang, Malaysia
| | - Markus Friedemann
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital `Carl Gustav Carus`, Technical University of Dresden, Dresden 01307, Germany
| | - Mario Menschikowski
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital `Carl Gustav Carus`, Technical University of Dresden, Dresden 01307, Germany
| | - Vadim V Tarasov
- Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia
| | - Vladimir N Chubarev
- Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia
| | - Sergey G Klochkov
- Institute of Physiologically Active Compounds, Russian Academy of Sciences, Chernogolovka 142432, Russia
| | - Margarita E Neganova
- Institute of Physiologically Active Compounds, Russian Academy of Sciences, Chernogolovka 142432, Russia
| | - Arduino A Mangoni
- Discipline of Clinical Pharmacology, College of Medicine and Public Health, Flinders University and Flinders Medical Centre, Bedford Park, South Australia 5042, Australia
| | - Gjumrakch Aliev
- Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia; Institute of Physiologically Active Compounds, Russian Academy of Sciences, Chernogolovka 142432, Russia; GALLY International Research Institute, San Antonio, TX 78229, USA; Research Institute of Human Morphology, Moscow 117418, Russia
| | - Anupam Bishayee
- Lake Erie College of Osteopathic Medicine, Bradenton, FL 34211, USA.
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13
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Sukocheva OA, Lukina E, McGowan E, Bishayee A. Sphingolipids as mediators of inflammation and novel therapeutic target in inflammatory bowel disease. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2020; 120:123-158. [PMID: 32085881 DOI: 10.1016/bs.apcsb.2019.11.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Morbidity of inflammatory gastrointestinal (GI) diseases continues to grow resulting in worsen quality of life and increased burden on public medical systems. Complex and heterogenous illnesses, inflammatory bowel diseases (IBDs) encompass several inflammation -associated pathologies including Crohn's disease and ulcerative colitis. IBD is often initiated by a complex interplay between host genetic and environmental factors, lifestyle and diet, and intestinal bacterial components. IBD inflammatory signature was linked to the pro-inflammatory cytokine tumor necrosis factor-α (TNF-α) signaling pathway that is currently targeted by IBD therapies. Sphingolipid signaling was identified as one of the key mediators and regulators of pro-inflammatory conditions, and, specifically, TNF-α related signaling. All GI tissues and circulating immune/blood cells contain activated sphingolipid-metabolizing enzymes, including sphingosine kinases (SphK1 and SphK2) that generate sphingosine-1-phosphate (S1P), a bioactive lipid and ligand for five G-protein coupled membrane S1P receptors (S1PRs). Numerous normal and pathogenic inflammatory responses are mediated by SphK/S1P/S1PRs signaling axis including lymphocyte trafficking and activation of cytokine signaling machinery. SphK1/S1P/S1PRs axis has recently been defined as a target for the treatment of GI diseases including IBD/colitis. Several SphK1 inhibitors and S1PRs antagonists have been developed as novel anti-inflammatory agents. In this review, we discuss the mechanisms of SphK/S1P signaling in inflammation-linked GI disorders. The potential role of SphK/S1PRs inhibitors in the prevention and treatment of IBD/colitis is critically evaluated.
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Affiliation(s)
- Olga A Sukocheva
- Discipline of Health Sciences, College of Nursing and Health Sciences, Flinders University, Bedford Park, SA, Australia
| | - Elena Lukina
- Discipline of Health Sciences, College of Nursing and Health Sciences, Flinders University, Bedford Park, SA, Australia
| | - Eileen McGowan
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
| | - Anupam Bishayee
- Lake Erie College of Osteopathic Medicine, Bradenton, FL, United States
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14
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Weigert A, Olesch C, Brüne B. Sphingosine-1-Phosphate and Macrophage Biology-How the Sphinx Tames the Big Eater. Front Immunol 2019; 10:1706. [PMID: 31379883 PMCID: PMC6658986 DOI: 10.3389/fimmu.2019.01706] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 07/08/2019] [Indexed: 12/11/2022] Open
Abstract
The sphingolipid sphingosine-1-phosphate (S1P) is produced by sphingosine kinases to either signal through intracellular targets or to activate a family of specific G-protein-coupled receptors (S1PR). S1P levels are usually low in peripheral tissues compared to the vasculature, forming a gradient that mediates lymphocyte trafficking. However, S1P levels rise during inflammation in peripheral tissues, thereby affecting resident or recruited immune cells, including macrophages. As macrophages orchestrate initiation and resolution of inflammation, the sphingosine kinase/S1P/S1P-receptor axis emerges as an important determinant of macrophage function in the pathogenesis of inflammatory diseases such as cancer, atherosclerosis, and infection. In this review, we therefore summarize the current knowledge how S1P affects macrophage biology.
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Affiliation(s)
- Andreas Weigert
- Faculty of Medicine, Institute of Biochemistry I, Goethe-University Frankfurt, Frankfurt, Germany
| | - Catherine Olesch
- Faculty of Medicine, Institute of Biochemistry I, Goethe-University Frankfurt, Frankfurt, Germany
| | - Bernhard Brüne
- Faculty of Medicine, Institute of Biochemistry I, Goethe-University Frankfurt, Frankfurt, Germany.,German Cancer Consortium (DKTK), Partner Site Frankfurt, Frankfurt, Germany.,Project Group Translational Medicine and Pharmacology TMP, Fraunhofer Institute for Molecular Biology and Applied Ecology, Frankfurt, Germany.,Frankfurt Cancer Institute, Goethe-University Frankfurt, Frankfurt, Germany
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15
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Heo JY, Im DS. Pro-Inflammatory Role of S1P 3 in Macrophages. Biomol Ther (Seoul) 2019; 27:373-380. [PMID: 30917625 PMCID: PMC6609111 DOI: 10.4062/biomolther.2018.215] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 12/20/2018] [Accepted: 02/18/2019] [Indexed: 11/30/2022] Open
Abstract
Sphingosine kinase 1 and its product, sphingosine 1-phosphate (S1P), as well as their receptors, have been implicated in inflammatory responses. The functions of receptors S1P1 and S1P2 on cell motility have been investigated. However, the function of S1P3 has been poorly investigated. In this study, the roles of S1P3 on inflammatory response were investigated in primary perito-neal macrophages. S1P3 receptor was induced along with sphingosine kinase 1 by stimulation of lipopolysaccharide (LPS). LPS treatment induced inflammatory genes, such iNOS, COX-2, IL-1β, IL-6 and TNF-α. TY52156, an antagonist of S1P3 suppressed the induction of inflammatory genes in a concentration dependent manner. Suppression of iNOS and COX-2 induction was further confirmed by western blotting and NO measurement. Suppression of IL-1β induction was also confirmed by western blotting and ELISA. Caspase 1, which is responsible for IL-1β production, was similarly induced by LPS and suppressed by TY52156. Therefore, we have shown S1P3 induction in the inflammatory conditions and its pro-inflammatory roles. Targeting S1P3 might be a strategy for regulating inflammatory diseases.
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Affiliation(s)
- Jae-Yeong Heo
- College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Dong-Soon Im
- College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
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16
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Yang L, Kraemer M, Fang XF, Angel PM, Drake RR, Morris AJ, Smyth SS. LPA receptor 4 deficiency attenuates experimental atherosclerosis. J Lipid Res 2019; 60:972-980. [PMID: 30796085 PMCID: PMC6495174 DOI: 10.1194/jlr.m091066] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 02/14/2019] [Indexed: 12/13/2022] Open
Abstract
The widely expressed lysophosphatidic acid (LPA) selective receptor 4 (LPAR4) contributes to vascular development in mice and zebrafish. LPAR4 regulates endothelial permeability, lymphocyte migration, and hematopoiesis, which could contribute to atherosclerosis. We investigated the role of LPAR4 in experimental atherosclerosis elicited by adeno-associated virus expressing PCSK9 to lower LDL receptor levels. After 20 weeks on a Western diet, cholesterol levels and lipoprotein distribution were similar in WT male and Lpar4Y/- mice (P = 0.94). The atherosclerotic lesion area in the proximal aorta and arch was ∼25% smaller in Lpar4Y/- mice (P = 0.009), and less atherosclerosis was detected in Lpar4Y/- mice at any given plasma cholesterol. Neutral lipid accumulation in aortic root sections occupied ∼40% less area in Lpar4Y/- mice (P = 0.001), and CD68 expression was ∼25% lower (P = 0.045). No difference in α-smooth muscle actin staining was observed. Bone marrow-derived macrophages isolated from Lpar4Y/- mice displayed significantly increased upregulation of the M2 marker Arg1 in response to LPA compared with WT cells. In aortic root sections from Lpar4Y/- mice, heightened M2 "repair" macrophage marker expression was detected by CD206 staining (P = 0.03). These results suggest that LPAR4 may regulate the recruitment of specific sets of macrophages or their phenotypic switching in a manner that could influence the development of atherosclerosis.
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Affiliation(s)
- Liping Yang
- Division of Cardiovascular Medicine, Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY 40536
| | - Maria Kraemer
- Division of Cardiovascular Medicine, Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY 40536
| | - Xianjun Frank Fang
- Department of Biochemistry and Molecular Biology VCU Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298-0614
| | - Peggi M Angel
- Department of Cell and Molecular Pharmacology MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC 29425
| | - Richard R Drake
- Department of Cell and Molecular Pharmacology MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC 29425
| | - Andrew J Morris
- Division of Cardiovascular Medicine, Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY 40536; Veterans Affairs Medical Center, Lexington, KY 40511
| | - Susan S Smyth
- Division of Cardiovascular Medicine, Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY 40536; Veterans Affairs Medical Center, Lexington, KY 40511.
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17
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Zizzo G, Cohen PL. Antibody Cross-Linking of CD14 Activates MerTK and Promotes Human Macrophage Clearance of Apoptotic Neutrophils: the Dual Role of CD14 at the Crossroads Between M1 and M2c Polarization. Inflammation 2019; 41:2206-2221. [PMID: 30091033 DOI: 10.1007/s10753-018-0864-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Mer receptor tyrosine kinase (MerTK) is key for efficient phagocytosis of apoptotic neutrophils (ANs) and homeostasis of IL-10 production by human anti-inflammatory M2c monocytes/macrophages. We asked whether stimulation of M2c surface receptors contributes in turn to MerTK activation. For this purpose, human monocytes/macrophages were differentiated under M1, M2a, and M2c polarizing conditions. The effects of antibody-mediated cross-linking of M2c receptors (i.e., CD14, CD16, CD32, CD163, CD204) on MerTK phosphorylation and phagocytosis of ANs were tested. MerTK expression was also studied by flow cytometry and western blot in the presence of LPS and in M2c-derived microvesicles (MVs). Antibody cross-linking of either CD14 or CD32/FcγRII led to Syk activation and MerTK phosphorylation in its two distinct glycoforms (175-205 and 135-155 kDa). Cross-linked CD14 enhanced efferocytosis by M2c macrophages and enabled M1 and M2a cells to clear ANs efficiently. In M1 conditions, LPS abolished surface MerTK expression on CD14bright cell subsets, so disrupting the anti-inflammatory pathway. In M2c cells, instead, MerTK was diffusely and brightly co-expressed with CD14, and was also detected in M2c macrophage-derived MVs; in these conditions, LPS only partially downregulated MerTK on cell surfaces, while the smaller MerTK glycoform contained in MVs remained intact. Altogether, cooperation between CD14 and MerTK may foster the clearance of ANs by human monocytes/macrophages. CD14 stands between M1-related LPS co-receptor activity and M2c-related MerTK-dependent response. MerTK interaction with CD32/FcγRII, its detection in M2c MVs, and the differential localization and LPS susceptibility of MerTK glycoforms add further new elements to the complexity of the MerTK network.
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Affiliation(s)
- Gaetano Zizzo
- Temple Autoimmunity Center, Temple University, 3500 N. Broad Street, Philadelphia, PA, 19140, USA. .,Section of Rheumatology, Department of Medicine, Lewis Katz School of Medicine at Temple University, 3322 N. Broad Street, Philadelphia, PA, 19140, USA.
| | - Philip L Cohen
- Temple Autoimmunity Center, Temple University, 3500 N. Broad Street, Philadelphia, PA, 19140, USA. .,Section of Rheumatology, Department of Medicine, Lewis Katz School of Medicine at Temple University, 3322 N. Broad Street, Philadelphia, PA, 19140, USA.
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18
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Nejatian N, Trautmann S, Thomas D, Pfeilschifter J, Badenhoop K, Koch A, Penna-Martinez M. Vitamin D effects on sphingosine 1-phosphate signaling and metabolism in monocytes from type 2 diabetes patients and controls. J Steroid Biochem Mol Biol 2019; 186:130-135. [PMID: 30336275 DOI: 10.1016/j.jsbmb.2018.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/17/2018] [Accepted: 10/06/2018] [Indexed: 12/21/2022]
Abstract
Elevated sphingosine 1-phopshate (S1P) concentration was observed in type 2 diabetes mellitus (T2D). On the other side, 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3) can influence the formation of sphingosine 1-phopshate (S1P) and the expression of S1P receptors, which are known to be involved in T2D. In order to evaluate mechanisms for the antiinflammatory potential of 1,25(OH)2D3, we investigated whether 1,25(OH)2D3 alters S1P signaling and metabolism in human CD14+ monocytes. Primary monocytes isolated from healthy controls (HC) and T2D patients were treated for 24 h with 10 nM 1,25(OH)2D3 in the absence or presence of 500 IU/ml interleukin-(IL)-1β. Thereafter, sphingosine kinase (SPHK)1, SPHK2 and S1P receptor 1-5 (S1P1-5) mRNA expression levels were measured by TaqMan™ analyses. Sphingolipid levels in cell supernatant were determined by high-performance liquid chromatography/tandem mass spectrometry (LC-MS/MS). 1,25(OH)2D3 treatment downregulated S1P1 and S1P2 mRNA expression compared to untreated monocytes of HC and T2D patients. In contrast, SPHK1, S1P3 and S1P4 mRNA expression levels were upregulated by 1,25(OH)2D3 treatment compared to the respective controls. Furthermore, reduced S1P2 and increased S1P3 and S1P4 mRNA expression levels upon treatment with 1,25(OH)2D3 occurred in the presence of IL-1β. Additionally, S1P levels in cell supernatants were decreased in monocytes from HC and T2D patients by 1,25(OH)2D3 with or without IL-1β costimulation. The levels of sphingosine in cell supernatants were not influenced by 1,25(OH)2D3. Overall, our results demonstrate for the first time that 1,25(OH)2D3 treatment can influence S1P receptor and SPHK expression and S1P levels in primary monocytes of both HC and subjects with T2D. These findings justify further investigations into the sphingolipid metabolism and potential benefits of vitamin D treatment in diabetes.
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Affiliation(s)
- Nojan Nejatian
- Department of Internal Medicine I, Division of Endocrinology, Diabetes and Metabolism, Goethe University Hospital, Frankfurt am Main, Germany.
| | - Sandra Trautmann
- Department of Clinical Pharmacology, Goethe University Hospital, Frankfurt am Main, Germany
| | - Dominique Thomas
- Department of Clinical Pharmacology, Goethe University Hospital, Frankfurt am Main, Germany
| | - Josef Pfeilschifter
- Department of General Pharmacology and Toxicology, Goethe University Hospital, Frankfurt am Main, Germany
| | - Klaus Badenhoop
- Department of Internal Medicine I, Division of Endocrinology, Diabetes and Metabolism, Goethe University Hospital, Frankfurt am Main, Germany
| | - Alexander Koch
- Department of General Pharmacology and Toxicology, Goethe University Hospital, Frankfurt am Main, Germany
| | - Marissa Penna-Martinez
- Department of Internal Medicine I, Division of Endocrinology, Diabetes and Metabolism, Goethe University Hospital, Frankfurt am Main, Germany
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19
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Liao CY, Song MJ, Gao Y, Mauer AS, Revzin A, Malhi H. Hepatocyte-Derived Lipotoxic Extracellular Vesicle Sphingosine 1-Phosphate Induces Macrophage Chemotaxis. Front Immunol 2018; 9:2980. [PMID: 30619336 PMCID: PMC6305739 DOI: 10.3389/fimmu.2018.02980] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 12/04/2018] [Indexed: 02/06/2023] Open
Abstract
Background: The pathophysiology of non-alcoholic steatohepatitis involves hepatocyte lipotoxicity due to excess saturated free fatty acids and concomitant proinflammatory macrophage effector responses. These include the infiltration of macrophages into hepatic cords in response to incompletely understood stimuli. Stressed hepatocytes release an increased number of extracellular vesicles (EVs), which are known to participate in intercellular signaling and coordination of the behavior of immune cell populations via their cargo. We hypothesized that hepatocyte-derived lipotoxic EVs that are enriched in sphingosine 1-phosphate (S1P) are effectors of macrophage infiltration in the hepatic microenvironment. Methods: Lipotoxic EVs were isolated from palmitate treated immortalized mouse hepatocytes and characterized by nanoparticle tracking analysis. Lipotoxic EV sphingolipids were quantified using tandem mass spectrometry. Wildtype and S1P1 receptor knockout bone marrow-derived macrophages were exposed to lipotoxic EV gradients in a microfluidic gradient generator. Macrophage migration toward EV gradients was captured by time-lapse microscopy and analyzed to determine directional migration. Fluorescence-activated cell sorting along with quantitative PCR and immunohistochemistry were utilized to characterize the cell surface expression of S1P1 receptor on intrahepatic leukocytes and hepatic expression of S1P1 receptor, respectively. Results: Palmitate treatment induced the release of EVs. These EVs were enriched in S1P. Palmitate-induced S1P enriched EVs were chemoattractive to macrophages. EV S1P enrichment depended on the activity of sphingosine kinases 1 and 2, such that, pharmacological inhibition of sphingosine kinases 1 and 2 resulted in a significant reduction in EV S1P cargo without affecting the number of EVs released. When exposed to EVs derived from cells treated with palmitate in the presence of a pharmacologic inhibitor of sphingosine kinases 1 and 2, macrophages displayed diminished chemotactic behavior. To determine receptor-ligand specificity, we tested the migration responses of macrophages genetically deleted in the S1P1 receptor toward lipotoxic EVs. S1P1 receptor knockout macrophages displayed a marked reduction in their chemotactic responses toward lipotoxic palmitate-induced EVs. Conclusions:Palmitate-induced lipotoxic EVs are enriched in S1P through sphingosine kinases 1 and 2. S1P-enriched EVs activate persistent and directional macrophage chemotaxis mediated by the S1P1 receptor, a potential signaling axis for macrophage infiltration during hepatic lipotoxicity, and a potential therapeutic target for non-alcoholic steatohepatitis.
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Affiliation(s)
- Chieh-Yu Liao
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Myeong Jun Song
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Yandong Gao
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, United States
| | - Amy S. Mauer
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Alexander Revzin
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, United States
| | - Harmeet Malhi
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
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20
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Rasche L, Paul F. Ozanimod for the treatment of relapsing remitting multiple sclerosis. Expert Opin Pharmacother 2018; 19:2073-2086. [PMID: 30407868 DOI: 10.1080/14656566.2018.1540592] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
INTRODUCTION Ozanimod is a selective sphingosine 1-phosphate receptor 1 and 5 modulator under development by Celgene, for the treatment of relapsing remitting multiple sclerosis. Extensive clinical experience has become available for the related compound fingolimod, favoring the sphingosine 1-phosphate therapeutic concept. Off-target effects have been attributed to its low receptor specificity and have prompted the development of next generation sphingosine 1-phosphate receptor modulators. Areas covered: The authors evaluate the literature of ozanimod, using the PubMed database as well as repositories of the European Committee for Treatment and Research in Multiple Sclerosis and the American and European Academy of Neurology. Specifically, the authors cover and discuss the preclinical data on ozanimod, pharmacokinetics and dynamics, and data on efficacy and safety from the pivotal trials. Expert opinion: Superiority of ozanimod over intramuscular interferon β-1a with regard to reduction in annualized relapse rate and magnetic resonance imaging outcomes has been shown in two phase III trials. The beneficial effect on brain volume and gray matter loss are encouraging and in line with data on other newer immunomodulators. Ozanimod is a valuable contribution to the therapeutic armamentarium in MS, although the effect on disability progression is unclear and requires further investigations.
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Affiliation(s)
- Ludwig Rasche
- a NeuroCure Clinical Research Center , Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität, and Berlin Institute of Health , Berlin , Germany
| | - Friedemann Paul
- a NeuroCure Clinical Research Center , Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität, and Berlin Institute of Health , Berlin , Germany.,b Experimental and Clinical Research Center , Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität, and Berlin Institute of Health , Berlin , Germany.,c Department of Neurology , Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health , Berlin , Germany
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21
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Huang L, Zhang L, Li T, Liu YW, Wang Y, Liu BJ. Human Plasma Metabolomics Implicates Modified 9-cis-Retinoic Acid in the Phenotype of Left Main Artery Lesions in Acute ST-Segment Elevated Myocardial Infarction. Sci Rep 2018; 8:12958. [PMID: 30154509 PMCID: PMC6113282 DOI: 10.1038/s41598-018-30219-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 07/23/2018] [Indexed: 12/18/2022] Open
Abstract
The detection of left main coronary artery disease (LMCAD) is crucial before ST-segment elevated myocardial infarction (STEMI) or sudden cardiac death. The aim of this study was to identify characteristic metabolite modifications in the LMCAD phenotype, using the metabolomics technique. Metabolic profiles were generated based on ultra-performance liquid chromatography and mass spectrometry, combined with multivariate statistical analysis. Plasma samples were collected prospectively from a propensity-score matched cohort including 44 STEMI patients (22 consecutive LMCAD and 22 non-LMCAD), and 22 healthy controls. A comprehensive metabolomics data analysis was performed with Metaboanalyst 3.0 version. The retinol metabolism pathway was shown to have the strongest discriminative power for the LMCAD phenotype. According to biomarker analysis through receiver-operating characteristic curves, 9-cis-retinoic acid (9cRA) dominated the first page of biomarkers, with area under the curve (AUC) value 0.888. Next highest were a biomarker panel consisting of 9cRA, dehydrophytosphingosine, 1H-Indole-3-carboxaldehyde, and another seven variants of lysophosphatidylcholines, exhibiting the highest AUC (0.933). These novel data propose that the retinol metabolism pathway was the strongest differential pathway for the LMCAD phenotype. 9cRA was the most critical biomarker of LMCAD, and a ten-metabolite plasma biomarker panel, in which 9cRA remained the weightiest, may help develop a potent predictive model for LMCAD in clinic.
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Affiliation(s)
- Lei Huang
- Heart Center, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Institute of Hepatobiliary Disease, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center of Public Health Ministry, Tianjin, P.R. China
| | - Lei Zhang
- Tianjin Institute of Hepatobiliary Disease, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center of Public Health Ministry, Tianjin, P.R. China.,Department of Clinical Laboratory, Tianjin Third Central Hospital, Tianjin, P.R. China
| | - Tong Li
- Heart Center, Tianjin Third Central Hospital, Tianjin, P.R. China. .,Tianjin Institute of Hepatobiliary Disease, Tianjin, P.R. China. .,Artificial Cell Engineering Technology Research Center of Public Health Ministry, Tianjin, P.R. China.
| | - Ying-Wu Liu
- Heart Center, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Institute of Hepatobiliary Disease, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center of Public Health Ministry, Tianjin, P.R. China
| | - Yu Wang
- Heart Center, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Institute of Hepatobiliary Disease, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center of Public Health Ministry, Tianjin, P.R. China
| | - Bo-Jiang Liu
- Heart Center, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Institute of Hepatobiliary Disease, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center of Public Health Ministry, Tianjin, P.R. China
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22
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Petty HR. Frontiers of Complex Disease Mechanisms: Membrane Surface Tension May Link Genotype to Phenotype in Glaucoma. Front Cell Dev Biol 2018; 6:32. [PMID: 29682502 PMCID: PMC5897435 DOI: 10.3389/fcell.2018.00032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 03/13/2018] [Indexed: 12/19/2022] Open
Abstract
Although many monogenic diseases are understood based upon structural changes of gene products, less progress has been made concerning polygenic disease mechanisms. This article presents a new interdisciplinary approach to understand complex diseases, especially their genetic polymorphisms. I focus upon primary open angle glaucoma (POAG). Although elevated intraocular pressure (IOP) and oxidative stress are glaucoma hallmarks, the linkages between these factors and cell death are obscure. Reactive oxygen species (ROS) promote the formation of oxidatively truncated phosphoglycerides (OTP), free fatty acids, lysophosphoglycerides, oxysterols, and other chemical species that promote membrane disruption and decrease membrane surface tension. Several POAG-linked gene polymorphisms identify proteins that manage damaged lipids and/or influence membrane surface tension. POAG-related genes expected to participate in these processes include: ELOVL5, ABCA1, APOE4, GST, CYP46A1, MYOC, and CAV. POAG-related gene products are expected to influence membrane surface tension, strength, and repair. I propose that heightened IOP overcomes retinal ganglion cell (RGC) membrane compressive strength, weakened by damaged lipid accumulation, to form pores. The ensuing structural failure promotes apoptosis and blindness. The linkage between glaucoma genotype and phenotype is mediated by physical events. Force balancing between the IOP and compressive strength regulates pore nucleation; force balancing between pore line tension and membrane surface tension regulates pore growth. Similar events may contribute to traumatic brain injury, Alzheimer's disease, and macular degeneration.
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Affiliation(s)
- Howard R Petty
- Department of Ophthalmology and Visual Sciences, The University of Michigan Medical School, Ann Arbor, MI, United States
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23
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Liu J, Zhan G, Chen D, Chen J, Yuan ZB, Zhang EL, Gao YX, Xu G, Sun BD, Liao W, Gao YQ. UPLC‑QTOFMS‑based metabolomic analysis of the serum of hypoxic preconditioning mice. Mol Med Rep 2017; 16:6828-6836. [PMID: 28901489 PMCID: PMC5865841 DOI: 10.3892/mmr.2017.7493] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 07/24/2017] [Indexed: 01/06/2023] Open
Abstract
Hypoxic preconditioning (HPC) is well‑known to exert a protective effect against hypoxic injury; however, the underlying molecular mechanism remains unclear. The present study utilized a serum metabolomics approach to detect the alterations associated with HPC. In the present study, an animal model of HPC was established by exposing adult BALB/c mice to acute repetitive hypoxia four times. The serum samples were collected by orbital blood sampling. Metabolite profiling was performed using ultra‑performance liquid chromatography‑quadrupole time‑of‑flight mass spectrometry (UPLC‑QTOFMS), in conjunction with univariate and multivariate statistical analyses. The results of the present study confirmed that the HPC mouse model was established and refined, suggesting significant differences between the control and HPC groups at the molecular levels. HPC caused significant metabolic alterations, as represented by the significant upregulation of valine, methionine, tyrosine, isoleucine, phenylalanine, lysophosphatidylcholine (LysoPC; 16:1), LysoPC (22:6), linoelaidylcarnitine, palmitoylcarnitine, octadecenoylcarnitine, taurine, arachidonic acid, linoleic acid, oleic acid and palmitic acid, and the downregulation of acetylcarnitine, malate, citrate and succinate. Using MetaboAnalyst 3.0, a number of key metabolic pathways were observed to be acutely perturbed, including valine, leucine and isoleucine biosynthesis, in addition to taurine, hypotaurine, phenylalanine, linoleic acid and arachidonic acid metabolism. The results of the present study provided novel insights into the mechanisms involved in the acclimatization of organisms to hypoxia, and demonstrated the protective mechanism of HPC.
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Affiliation(s)
- Jie Liu
- Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038, P.R. China
| | - Gang Zhan
- Key Laboratory of High Altitude Medicine, Ministry of Education, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038, P.R. China
| | - Dewei Chen
- Key Laboratory of High Altitude Medicine, Ministry of Education, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038, P.R. China
| | - Jian Chen
- Key Laboratory of High Altitude Medicine, Ministry of Education, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038, P.R. China
| | - Zhi-Bin Yuan
- Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038, P.R. China
| | - Er-Long Zhang
- Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038, P.R. China
| | - Yi-Xing Gao
- Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038, P.R. China
| | - Gang Xu
- Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038, P.R. China
| | - Bing-Da Sun
- Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038, P.R. China
| | - Wenting Liao
- Department of Pharmaceutical Analysis, School of Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu 210009, P.R. China
| | - Yu-Qi Gao
- Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Chongqing 400038, P.R. China
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Differential S1P Receptor Profiles on M1- and M2-Polarized Macrophages Affect Macrophage Cytokine Production and Migration. BIOMED RESEARCH INTERNATIONAL 2017; 2017:7584621. [PMID: 28367448 PMCID: PMC5358463 DOI: 10.1155/2017/7584621] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 01/16/2017] [Accepted: 02/02/2017] [Indexed: 12/15/2022]
Abstract
Introduction. Macrophages are key players in complex biological processes. In response to environmental signals, macrophages undergo polarization towards a proinflammatory (M1) or anti-inflammatory (M2) phenotype. Sphingosine 1-phosphate (S1P) is a bioactive lysophospholipid that acts via 5 G-protein coupled receptors (S1P1–5) in order to influence a broad spectrum of biological processes. This study assesses S1P receptor expression on macrophages before and after M1 and M2 polarization and performs a comparative analysis of S1P signalling in the two activational states of macrophages. Methods. Bone marrow derived macrophages (BMDM) from C57 BL/6 mice were cultured under either M1- or M2-polarizing conditions. S1P-receptor expression was determined by quantitative RT-PCR. Influence of S1P on macrophage activation, migration, phagocytosis, and cytokine secretion was assessed in vitro. Results. All 5 S1P receptor subclasses were expressed in macrophages. Culture under both M1- and M2-polarizing conditions led to significant downregulation of S1P1. In contrast, M1-polarized macrophages significantly downregulated S1P4. The expression of the remaining three S1P receptors did not change. S1P increased expression of iNOS under M2-polarizing conditions. Furthermore, S1P induced chemotaxis in M1 macrophages and changed cytokine production in M2 macrophages. Phagocytosis was not affected by S1P-signalling. Discussion. The expression of different specific S1P receptor profiles may provide a possibility to selectively influence M1- or M2-polarized macrophages.
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Yang Z, Zhao A, Li Z, Ge H, Li T, Zhang F, Zhan H, Wang J. Metabolomics reveals positive acceleration(+Gz)-induced metabolic perturbations and the protective effect of Ginkgo biloba extract in a rat model based on ultra high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry. J Pharm Biomed Anal 2016; 125:77-84. [PMID: 27010354 DOI: 10.1016/j.jpba.2016.03.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 03/02/2016] [Accepted: 03/04/2016] [Indexed: 01/19/2023]
Abstract
Positive acceleration (+Gz) in the head-to-foot direction generated by modern high-performance fighter jets during flight maneuvers is characterized by high G values and a rapid rate of acceleration, and is often long in duration and a repeated occurrence. The acceleration overload far exceeds the pilot's physiological tolerance limits and causes considerable strain on several organ systems. Despite the importance of monitoring pathophysiological alterations related to +Gz exposure, we lack a complete explanation of the pathophysiology of +Gz exposure. Ginkgo biloba extract (GBE) is a classic traditional Chinese medicine (TCM) that might exert a protective effect against +Gz exposure. However, its mechanism remains unclear. Here, a metabolomics approach based on ultra high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOFMS) was used to characterize +Gz-induced metabolic fluctuations in a rat model and to evaluate the protective effect of GBE. Using partial least-squares discriminant analysis for the classification and selection of biomarkers, eighteen serum metabolites related to +Gz exposure were identified, and were found to primarily involve the fatty acid β-oxidation pathway, glycerophospholipid metabolism, phospholipid metabolism, bile acid metabolism, purine metabolism and lysine metabolism. Taking these potential biomarkers as screening indexes, we found that GBE could reverse the pathological process of +Gz exposure by partially regulating the perturbed fatty acid β-oxidation pathway, glycerophospholipid metabolism, purine metabolism and lysine metabolism. This indicates that UHPLC-Q-TOFMS-based metabolomics provides a powerful tool to reveal serum metabolic fluctuations in response to +Gz exposure and to study the mechanism underlying TCM.
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Affiliation(s)
- Zhihui Yang
- Department of Clinical Aerospace Medicine, Fourth Military Medical University, Xi'an, 710032 Shanxi, China; Department of Pharmacology, General Hospital of Air Force, PLA, Beijing 100142, China
| | - Andong Zhao
- Department of Clinical Aerospace Medicine, Fourth Military Medical University, Xi'an, 710032 Shanxi, China; Institute of Aviation Medicine, Air Force, Beijing 100142, China
| | - Zhongdong Li
- Department of Pharmacology, General Hospital of Air Force, PLA, Beijing 100142, China
| | - Hua Ge
- Institute of Aviation Medicine, Air Force, Beijing 100142, China
| | - Tonghua Li
- Department of Clinical Aerospace Medicine, Fourth Military Medical University, Xi'an, 710032 Shanxi, China
| | - Fucheng Zhang
- Department of Pharmacology, General Hospital of Air Force, PLA, Beijing 100142, China
| | - Hao Zhan
- Institute of Aviation Medicine, Air Force, Beijing 100142, China.
| | - Jianchang Wang
- Center of Clinical Aviation Medicine, General Hospital of Air Force, PLA, Beijing 100142, China.
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Metabolite Modulation in Human Plasma in the Early Phase of Acclimatization to Hypobaric Hypoxia. Sci Rep 2016; 6:22589. [PMID: 26940428 PMCID: PMC4778071 DOI: 10.1038/srep22589] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 02/17/2016] [Indexed: 12/17/2022] Open
Abstract
The exposure of healthy subjects to high altitude represents a model to explore the pathophysiology of diseases related to tissue hypoxia. We explored a plasma metabolomics approach to detect alterations induced by the exposure of subjects to high altitude. Plasma samples were collected from 60 subjects both on plain and at high altitude (5300 m). Metabolite profiling was performed by gas chromatography-mass spectrometry (GC-MS) and ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-QTOFMS) in conjunction with univariate and multivariate statistical analyses. ELISA assays were further employed to measure the levels of several relevant enzymes together with perturbed metabolic pathways. The results showed that hypobaric hypoxia caused significant and comprehensive metabolic changes, as represented by significant changes of 44 metabolites and 4 relevant enzymes. Using MetaboAnalyst 3.0, it was found that several key metabolic pathways were acutely perturbed. In addition, 5 differentially expressed metabolites in pre-exposure samples from the acute mountain sickness-susceptible (AMS-S) group compared with those from the AMS-resistant (AMS-R) group are identified, which warrant further validation as potential predictive biomarkers for AMS-S individuals. These results provide new insights for further understanding the pathophysiological mechanism of early acclimatization to hypobaric hypoxia and other diseases correlated to tissue hypoxia.
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Di Dario M, Colombo E, Govi C, De Feo D, Messina MJ, Romeo M, Sangalli F, Moiola L, Rodegher M, Martino G, Martinelli V, Comi G, Farina C. Myeloid cells as target of fingolimod action in multiple sclerosis. NEUROLOGY-NEUROIMMUNOLOGY & NEUROINFLAMMATION 2015; 2:e157. [PMID: 26587553 PMCID: PMC4635549 DOI: 10.1212/nxi.0000000000000157] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Accepted: 08/05/2015] [Indexed: 01/03/2023]
Abstract
Objective: To track the effects of fingolimod, an approved drug for multiple sclerosis (MS), on the activation of myeloid cells from the periphery to the CNS. Methods: In vitro and ex vivo immunologic studies coupled with flow cytometry were performed to evaluate the action of fingolimod on lipopolysaccharide (LPS)–induced expression of activation markers in human monocytes from healthy participants, participants with untreated MS, and participants with fingolimod-treated MS. In vivo administration of fingolimod during experimental autoimmune encephalomyelitis (EAE) was established to verify the activation state of splenic, CNS infiltrating, and CNS resident myeloid cells ex vivo at flow cytometer. Results: We found that in vitro exposure of human monocytes to fingolimod inhibited LPS-induced CD25 and CD150 expression and tumor necrosis factor–α (TNF-α) secretion without altering immune cell survival. Further, EAE treatment with fingolimod led to reduced amounts of TNF-α produced by myeloid cells in vivo in the spleen and CNS. Finally, while displaying normal induction of CD25 and CD150 levels at high LPS concentration, monocytes from patients with fingolimod-treated MS showed significantly higher activation threshold at suboptimal LPS stimulation than controls. Conclusions: The inhibition of myeloid cell activation may be part of the immunosuppressive action of fingolimod and take place in the periphery and in the CNS.
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Affiliation(s)
- Marco Di Dario
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Emanuela Colombo
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Chiara Govi
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Donatella De Feo
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Maria José Messina
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Marzia Romeo
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Francesca Sangalli
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Lucia Moiola
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Mariaemma Rodegher
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Gianvito Martino
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Vittorio Martinelli
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Giancarlo Comi
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Cinthia Farina
- Institute of Experimental Neurology (INSpe), Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
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Mahajan-Thakur S, Böhm A, Jedlitschky G, Schrör K, Rauch BH. Sphingosine-1-Phosphate and Its Receptors: A Mutual Link between Blood Coagulation and Inflammation. Mediators Inflamm 2015; 2015:831059. [PMID: 26604433 PMCID: PMC4641948 DOI: 10.1155/2015/831059] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 09/26/2015] [Accepted: 09/30/2015] [Indexed: 02/02/2023] Open
Abstract
Sphingosine-1-phosphate (S1P) is a versatile lipid signaling molecule and key regulator in vascular inflammation. S1P is secreted by platelets, monocytes, and vascular endothelial and smooth muscle cells. It binds specifically to a family of G-protein-coupled receptors, S1P receptors 1 to 5, resulting in downstream signaling and numerous cellular effects. S1P modulates cell proliferation and migration, and mediates proinflammatory responses and apoptosis. In the vascular barrier, S1P regulates permeability and endothelial reactions and recruitment of monocytes and may modulate atherosclerosis. Only recently has S1P emerged as a critical mediator which directly links the coagulation factor system to vascular inflammation. The multifunctional proteases thrombin and FXa regulate local S1P availability and interact with S1P signaling at multiple levels in various vascular cell types. Differential expression patterns and intracellular signaling pathways of each receptor enable S1P to exert its widespread functions. Although a vast amount of information is available about the functions of S1P and its receptors in the regulation of physiological and pathophysiological conditions, S1P-mediated mechanisms in the vasculature remain to be elucidated. This review summarizes recent findings regarding the role of S1P and its receptors in vascular wall and blood cells, which link the coagulation system to inflammatory responses in the vasculature.
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Affiliation(s)
- Shailaja Mahajan-Thakur
- Institut für Pharmakologie, Universitätsmedizin Greifswald, Felix-Hausdorf Strasse 3, 17487 Greifswald, Germany
| | - Andreas Böhm
- Institut für Pharmakologie, Universitätsmedizin Greifswald, Felix-Hausdorf Strasse 3, 17487 Greifswald, Germany
| | - Gabriele Jedlitschky
- Institut für Pharmakologie, Universitätsmedizin Greifswald, Felix-Hausdorf Strasse 3, 17487 Greifswald, Germany
| | - Karsten Schrör
- Institut für Pharmakologie und Klinische Pharmakologie, Universitätsklinikum Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| | - Bernhard H. Rauch
- Institut für Pharmakologie, Universitätsmedizin Greifswald, Felix-Hausdorf Strasse 3, 17487 Greifswald, Germany
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Three plasma metabolite signatures for diagnosing high altitude pulmonary edema. Sci Rep 2015; 5:15126. [PMID: 26459926 PMCID: PMC4602305 DOI: 10.1038/srep15126] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 09/17/2015] [Indexed: 01/12/2023] Open
Abstract
High-altitude pulmonary edema (HAPE) is a potentially fatal condition, occurring at altitudes greater than 3,000 m and affecting rapidly ascending, non-acclimatized healthy individuals. However, the lack of biomarkers for this disease still constitutes a bottleneck in the clinical diagnosis. Here, ultra-high performance liquid chromatography coupled with Q-TOF mass spectrometry was applied to study plasma metabolite profiling from 57 HAPE and 57 control subjects. 14 differential plasma metabolites responsible for the discrimination between the two groups from discovery set (35 HAPE subjects and 35 healthy controls) were identified. Furthermore, 3 of the 14 metabolites (C8-ceramide, sphingosine and glutamine) were selected as candidate diagnostic biomarkers for HAPE using metabolic pathway impact analysis. The feasibility of using the combination of these three biomarkers for HAPE was evaluated, where the area under the receiver operating characteristic curve (AUC) was 0.981 and 0.942 in the discovery set and the validation set (22 HAPE subjects and 22 healthy controls), respectively. Taken together, these results suggested that this composite plasma metabolite signature may be used in HAPE diagnosis, especially after further investigation and verification with larger samples.
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Arish M, Husein A, Kashif M, Saleem M, Akhter Y, Rub A. Sphingosine-1-phosphate signaling: unraveling its role as a drug target against infectious diseases. Drug Discov Today 2015; 21:133-142. [PMID: 26456576 DOI: 10.1016/j.drudis.2015.09.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 09/23/2015] [Accepted: 09/29/2015] [Indexed: 12/25/2022]
Abstract
Sphingosine-1-phosphate (S1P) signaling is reported in variety of cell types, including immune, endothelial and cancerous cells. It is emerging as a crucial regulator of cellular processes, such as apoptosis, cell proliferation, migration, differentiation and so on. This signaling pathway is initiated by the intracellular production and secretion of S1P through a cascade of enzymatic reactions. Binding of S1P to different S1P receptors (S1PRs) activates different downstream signaling pathways that regulate the cellular functions differentially depending upon the cell type. An accumulating body of evidence suggests that S1P metabolism and signaling is often impaired during infectious diseases; thus, its manipulation might be helpful in the treatment of such diseases. In this review, we summarize recent advances in our understanding of the S1P signaling pathway and its candidature as a novel drug target against infectious diseases.
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Affiliation(s)
- Mohd Arish
- Infection and Immunity Lab, Department of Biotechnology, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Atahar Husein
- Infection and Immunity Lab, Department of Biotechnology, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Mohammad Kashif
- Infection and Immunity Lab, Department of Biotechnology, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Mohammed Saleem
- Department of Life Sciences, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Yusuf Akhter
- School of Life Sciences, Central University of Himachal Pradesh, Temporary Academic Block, Shahpur, Kangra, HP 176216, India
| | - Abdur Rub
- Infection and Immunity Lab, Department of Biotechnology, Jamia Millia Islamia (A Central University), New Delhi 110025, India.
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Long Y, Dong X, Yuan Y, Huang J, Song J, Sun Y, Lu Z, Yang L, Yu W. Metabolomics changes in a rat model of obstructive jaundice: mapping to metabolism of amino acids, carbohydrates and lipids as well as oxidative stress. J Clin Biochem Nutr 2015; 57:50-9. [PMID: 26236101 PMCID: PMC4512893 DOI: 10.3164/jcbn.14-147] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 03/04/2015] [Indexed: 12/11/2022] Open
Abstract
The study examined the global metabolic and some biochemical changes in rats with cholestasis induced by bile duct ligation (BDL). Serum samples were collected in male Wistar rats with BDL (n = 8) and sham surgery (n = 8) at day 3 after surgery for metabolomics analysis using a combination of reversed phase chromatography and hydrophilic interaction chromatography (HILIC) and quadrupole-time-of-flight mass spectrometry (Q-TOF MS). The serum levels of malondialdehyde (MDA), total antioxidative capacity (T-AOC), glutathione (GSH) and glutathione disulfide (GSSG), the activities of superoxide dismutase (SOD) and glutathion peroxidase (GSH-Px) were measured to estimate the oxidative stress state. Key changes after BDL included increased levels of l-phenylalanine, l-glutamate, l-tyrosine, kynurenine, l-lactic acid, LysoPCc (14:0), glycine and succinic acid and decreased levels of l-valine, PCb (19:0/0:0), taurine, palmitic acid, l-isoleucine and citric acid metabolism products. And treatment with BDL significantly decreased the levels of GSH, T-AOC as well as SOD, GSH-Px activities, and upregulated MDA levels. The changes could be mapped to metabolism of amino acids and lipids, Krebs cycle and glycolysis, as well as increased oxidative stress and decreased antioxidant capability. Our study indicated that BDL induces major changes in the metabolism of all 3 major energy substances, as well as oxidative stress.
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Affiliation(s)
- Yue Long
- Department of Anaesthesiology, Eastern Hepatobiliary Surgical Hospital, Second Military Medical University, Shanghai 200438, China ; Department of Anesthesiology, 163th Hospital of PLA, Hunan 410003, China
| | - Xin Dong
- Department of Pharmaceutical Analysis, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Yawei Yuan
- Department of Anaesthesiology, Eastern Hepatobiliary Surgical Hospital, Second Military Medical University, Shanghai 200438, China
| | - Jinqiang Huang
- Department of Anaesthesiology, Eastern Hepatobiliary Surgical Hospital, Second Military Medical University, Shanghai 200438, China
| | - Jiangang Song
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Yumin Sun
- Department of Anaesthesiology, Eastern Hepatobiliary Surgical Hospital, Second Military Medical University, Shanghai 200438, China
| | - Zhijie Lu
- Department of Anaesthesiology, Eastern Hepatobiliary Surgical Hospital, Second Military Medical University, Shanghai 200438, China
| | - Liqun Yang
- Department of Anesthesiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Weifeng Yu
- Department of Anaesthesiology, Eastern Hepatobiliary Surgical Hospital, Second Military Medical University, Shanghai 200438, China
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Shirai T, Hilhorst M, Harrison DG, Goronzy JJ, Weyand CM. Macrophages in vascular inflammation--From atherosclerosis to vasculitis. Autoimmunity 2015; 48:139-51. [PMID: 25811915 DOI: 10.3109/08916934.2015.1027815] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The spectrum of vascular inflammatory disease ranges from atherosclerosis and hypertension, widespread conditions affecting large proportions of the population, to the vasculitides, rare syndromes leading to fast and irreversible organ failure. Atherosclerosis progresses over decades, inevitably proceeding through multiple phases of disease and causes its major complications when the vessel wall lesion ruptures, giving rise to lumen-occlusive atherothrombosis. Vasculitides of medium and large arteries progress rapidly, causing tissue ischemia through lumen-occlusive intimal hyperplasia. In both disease entities, macrophages play a decisive role in pathogenesis, but function in the context of other immune cells that direct their differentiation and their functional commitments. In atherosclerosis, macrophages are involved in the removal of lipids and tissue debris and make a critical contribution to tissue damage and wall remodeling. In several of the vasculitides, macrophages contribute to granuloma formation, a microstructural platform optimizing macrophage-T-cell interactions, antigen containment and inflammatory amplification. By virtue of their versatility and plasticity, macrophages are able to promote a series of pathogenic functions, ranging from the release of cytokines and enzymes, the production of reactive oxygen species, presentation of antigen and secretion of tissue remodeling factors. However, as short-lived cells that lack memory, macrophages are also amendable to reprogramming, making them promising targets for anti-inflammatory interventions.
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Affiliation(s)
- Tsuyoshi Shirai
- Division of Immunology and Rheumatology, Department of Medicine, Stanford University School of Medicine , Stanford, CA , USA and
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Chien HY, Lu CS, Chuang KH, Kao PH, Wu YL. Attenuation of LPS-induced cyclooxygenase-2 and inducible NO synthase expression by lysophosphatidic acid in macrophages. Innate Immun 2015; 21:635-46. [DOI: 10.1177/1753425915576345] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 02/12/2015] [Indexed: 01/09/2023] Open
Abstract
LPS can activate the inflammatory cascades by inducing various inflammatory mediators, such as prostaglandin E2 (PGE2) resulting from cyclooxygenase-2 (COX-2), and NO produced by inducible NO synthase (iNOS). Lysophosphatidic acid (LPA) has been demonstrated to participate in inflammation. This study aimed to clarify the impact and the involving mechanisms of LPA on LPS-incurred inflammation in macrophages. First, LPA appeared to attenuate LPS-induced protein and mRNA expression of COX-2 and iNOS genes, as well as production of PGE2 and NO. By using selective inhibitors targeting various signaling players, the inhibitory G protein alpha subunit (Gαi) seemed to be involved in the effect of LPA; p38, ERK and NF-κB were involved in the LPS-mediated COX-2/PGE2 pathway; and p38, JNK, phosphoinositide-3-kinase and NF-κB were involved in the LPS-mediated iNOS/NO pathway. LPA was able to diminish LPS-induced phosphorylation of p38 and Akt, as well as NF-κB p65 nuclear translocation. By utilization of inhibitors of COX-2 and iNOS, there appeared to be no modulation between the COX-2/PGE2 and the iNOS/NO signaling pathways. Our findings demonstrate a clear anti-inflammatory role of LPA acting via Gαi in LPS-mediated inflammatory response in macrophages, owing, at least in part, to its suppressive effect on LPS-induced activation of p38, Akt and NF-κB.
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Affiliation(s)
- Han-Yuan Chien
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chih-Shen Lu
- Department of Neurosurgery, Cheng Hsin General Hospital, Taipei, Taiwan
| | - Kun-Han Chuang
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Pu-Hong Kao
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Yuh-Lin Wu
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
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Lee GH, Lee SJ, Jeong DY, Kim HY, Lee D, Lee T, Hwang JY, Park WK, Kong JY, Cho H, Gong YD. Discovery of a Novel 2,6-Difunctionalized 2H-Benzopyran Inhibitors Toward Sphingosylphosphorylcholine Synthetic Pathway as New Anti-inflammatory Target. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.8.2385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Cheng Q, Ma S, Lin D, Mei Y, Gong H, Lei L, Chen Y, Zhao Y, Hu B, Wu Y, Yu X, Zhao L, Liu H. The S1P1 receptor-selective agonist CYM-5442 reduces the severity of acute GVHD by inhibiting macrophage recruitment. Cell Mol Immunol 2014; 12:681-91. [PMID: 25088224 DOI: 10.1038/cmi.2014.59] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 06/15/2014] [Accepted: 06/15/2014] [Indexed: 01/04/2023] Open
Abstract
FTY720, an agonist for four of the five known sphingosine-1-phosphate (S1P) receptors, has been reported to inhibit acute graft-versus-host disease (aGVHD). Because FTY720 functions through multiple S1P receptors, the mechanism of action through one or more of these receptors may account for its side effects. Thus, more selective S1P receptor modulators are needed to evaluate the roles of different S1P receptors and their therapeutic efficacies. In this study, we investigated the effect of an S1P1-selective agonist, CYM-5442, on the progression of aGVHD. We showed that CYM-5442 significantly inhibited but did not prevent aGVHD. CYM-5442 did not affect the infiltration of the donor T cells into the target organs, while the number of macrophages in GVHD organs was significantly reduced by CYM-5442 treatment. In vivo proliferation assays showed that the proliferation of macrophages was not suppressed by CYM-5442. Further studies using human endothelial cells demonstrated that CYM-5442 treatment downregulated CCL2 and CCL7 expression in endothelial cells, therefore reducing the migration of monocytes, from which tissue macrophages originate. Our data demonstrate the therapeutic efficacy of an S1P1-selective agonist in aGVHD and its possible mechanism of action. The results suggest that further investigations are needed regarding CYM-5442 as a potential therapeutic regimen for aGVHD.
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Affiliation(s)
- Qiao Cheng
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Shoubao Ma
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Dandan Lin
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Yu Mei
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Huanle Gong
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Lei Lei
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Yuanyuan Chen
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Ye Zhao
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China.,Department of Hematology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Bo Hu
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Yan Wu
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Xiao Yu
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Lixiang Zhao
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Haiyan Liu
- Laboratory of Cellular and Molecular Tumor Immunology, Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China.,Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital of Soochow University, Suzhou, China
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Mahajan-Thakur S, Sostmann BD, Fender AC, Behrendt D, Felix SB, Schrör K, Rauch BH. Sphingosine-1-phosphate induces thrombin receptor PAR-4 expression to enhance cell migration and COX-2 formation in human monocytes. J Leukoc Biol 2014; 96:611-8. [PMID: 24990321 DOI: 10.1189/jlb.3ab1013-567r] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Thrombin is not only a central factor in blood coagulation but also stimulates inflammatory processes, including monocyte responses, via activation of PARs. The signaling lipid S1P is a major determinant of monocyte function. Here, we established an interaction between S1P and human monocyte responses to thrombin. S1P induced PAR-1 and PAR-4 mRNA and total protein expression in human monocytes and U937 cells in a concentration (0.1-10 μM)- and time (1-24 h)-dependent manner, respectively. However, only PAR-4 cell-surface expression was increased significantly by S1P, whereas PAR-1 remained unaffected. This response was associated with activation of the Akt, Erk, and p38 pathway and induction of COX-2 but not COX-1. PAR-4-mediated induction of COX-2 was prevented by the PI3K inhibitor LY (10 μM). Preincubation of human monocytes with S1P (1 μM; 16 h) resulted in an enhanced chemotaxis toward thrombin or to selective AP for PAR-4 but not PAR-1. Furthermore, down-regulation of PAR-4 transcription with siRNA attenuated the chemotactic response to thrombin and AP4. In conclusion, S1P enhances monocyte responses to thrombin via up-regulation of PAR-4 expression, which promotes cell migration and COX-2 abundance. This mechanism may facilitate monocyte recruitment to sites of vessel injury and inflammation.
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Affiliation(s)
| | - Björn D Sostmann
- Institut für Pharmakologie und Klinische Pharmakologie, Heinrich-Heine-Universität Düsseldorf, Germany
| | - Anke C Fender
- Institut für Pharmakologie und Klinische Pharmakologie, Heinrich-Heine-Universität Düsseldorf, Germany
| | - Daniel Behrendt
- Klinik und Poliklinik für Chirurgie, Abteilung für Allgemeine Chirurgie, Viszeral-, Thorax- und Gefässchirurgie, and
| | - Stephan B Felix
- Klinik und Poliklinik für Innere Medizin B, Universitätsmedizin Greifswald, Germany; and
| | - Karsten Schrör
- Institut für Pharmakologie und Klinische Pharmakologie, Heinrich-Heine-Universität Düsseldorf, Germany
| | - Bernhard H Rauch
- Institut für Pharmakologie, Center of Drug Absorption and Transport,
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Park SM, Angel CE, McIntosh JD, Brooks AES, Middleditch M, Chen CJJ, Ruggiero K, Cebon J, Rod Dunbar P. Sphingosine-1-phosphate lyase is expressed by CD68+cells on the parenchymal side of marginal reticular cells in human lymph nodes. Eur J Immunol 2014; 44:2425-36. [DOI: 10.1002/eji.201344158] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 03/31/2014] [Accepted: 05/08/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Saem Mul Park
- School of Biological Sciences; The University of Auckland; Auckland New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; The University of Auckland; Auckland New Zealand
| | - Catherine E. Angel
- School of Biological Sciences; The University of Auckland; Auckland New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; The University of Auckland; Auckland New Zealand
| | - Julie D. McIntosh
- School of Biological Sciences; The University of Auckland; Auckland New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; The University of Auckland; Auckland New Zealand
| | - Anna E. S. Brooks
- School of Biological Sciences; The University of Auckland; Auckland New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; The University of Auckland; Auckland New Zealand
| | - Martin Middleditch
- School of Biological Sciences; The University of Auckland; Auckland New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; The University of Auckland; Auckland New Zealand
| | - Chun-Jen J. Chen
- School of Biological Sciences; The University of Auckland; Auckland New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; The University of Auckland; Auckland New Zealand
| | - Katya Ruggiero
- School of Biological Sciences; The University of Auckland; Auckland New Zealand
| | - Jonathan Cebon
- Ludwig Institute for Cancer Research; Austin Health, Heidelberg; Melbourne VIC Australia
| | - P. Rod Dunbar
- School of Biological Sciences; The University of Auckland; Auckland New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery; The University of Auckland; Auckland New Zealand
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38
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Francisella tularensis LVS induction of prostaglandin biosynthesis by infected macrophages requires specific host phospholipases and lipid phosphatases. Infect Immun 2014; 82:3299-311. [PMID: 24866789 DOI: 10.1128/iai.02060-14] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Francisella tularensis induces the synthesis of prostaglandin E(2) (PGE(2)) by infected macrophages to alter host immune responses, thus providing a survival advantage to the bacterium. We previously demonstrated that PGE(2) synthesis by F. tularensis-infected macrophages requires cytosolic phospholipase A2 (cPLA(2)), cyclooxygenase 2 (COX-2), and microsomal prostaglandin E synthase 1 (mPGES1). During inducible PGE(2) synthesis, cPLA(2) hydrolyzes arachidonic acid (AA) from cellular phospholipids to be converted to PGE(2). However, in F. tularensis-infected macrophages we observed a temporal disconnect between Ser505-cPLA(2) phosphorylation (a marker of activation) and PGE(2) synthesis. These results suggested to us that cPLA(2) is not responsible for the liberation of AA to be converted into PGE(2) by F. tularensis-infected macrophages. Utilizing small-molecule inhibitors, we demonstrated that phospholipase D and diacylglycerol lipase were required for providing AA for PGE(2) biosynthesis. cPLA(2), on the other hand, was required for macrophage cytokine responses to F. tularensis. We also demonstrated for the first time that lipin-1 and PAP2a contribute to macrophage inflammation in response to F. tularensis. Our results identify both an alternative pathway for inducible PGE(2) synthesis and a role for lipid-modifying enzymes in the regulation of macrophage inflammatory function.
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David M, Machuca-Gayet I, Kikuta J, Ottewell P, Mima F, Leblanc R, Bonnelye E, Ribeiro J, Holen I, Vales RL, Jurdic P, Chun J, Clézardin P, Ishii M, Peyruchaud O. Lysophosphatidic acid receptor type 1 (LPA1) plays a functional role in osteoclast differentiation and bone resorption activity. J Biol Chem 2014; 289:6551-6564. [PMID: 24429286 DOI: 10.1074/jbc.m113.533232] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Lysophosphatidic acid (LPA) is a natural bioactive lipid that acts through six different G protein-coupled receptors (LPA1-6) with pleiotropic activities on multiple cell types. We have previously demonstrated that LPA is necessary for successful in vitro osteoclastogenesis of bone marrow cells. Bone cells controlling bone remodeling (i.e. osteoblasts, osteoclasts, and osteocytes) express LPA1, but delineating the role of this receptor in bone remodeling is still pending. Despite Lpar1(-/-) mice displaying a low bone mass phenotype, we demonstrated that bone marrow cell-induced osteoclastogenesis was reduced in Lpar1(-/-) mice but not in Lpar2(-/-) and Lpar3(-/-) animals. Expression of LPA1 was up-regulated during osteoclastogenesis, and LPA1 antagonists (Ki16425, Debio0719, and VPC12249) inhibited osteoclast differentiation. Blocking LPA1 activity with Ki16425 inhibited expression of nuclear factor of activated T-cell cytoplasmic 1 (NFATc1) and dendritic cell-specific transmembrane protein and interfered with the fusion but not the proliferation of osteoclast precursors. Similar to wild type osteoclasts treated with Ki16425, mature Lpar1(-/-) osteoclasts had reduced podosome belt and sealing zone resulting in reduced mineralized matrix resorption. Additionally, LPA1 expression markedly increased in the bone of ovariectomized mice, which was blocked by bisphosphonate treatment. Conversely, systemic treatment with Debio0719 prevented ovariectomy-induced cancellous bone loss. Moreover, intravital multiphoton microscopy revealed that Debio0719 reduced the retention of CX3CR1-EGFP(+) osteoclast precursors in bone by increasing their mobility in the bone marrow cavity. Overall, our results demonstrate that LPA1 is essential for in vitro and in vivo osteoclast activities. Therefore, LPA1 emerges as a new target for the treatment of diseases associated with excess bone loss.
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Affiliation(s)
- Marion David
- INSERM, UMR1033, UCB Lyon 1, Faculté de Médecine Lyon Est, 69732 Lyon, France
| | - Irma Machuca-Gayet
- CNRS, UMR5242, ENS, Équipe Biologie Cellulaire et Physiopathologie Osseuse, Institut de Génomique Fonctionnelle de Lyon, UCB Lyon 1, 69007 Lyon, France
| | - Junichi Kikuta
- Department of Immunology and Cell Biology, Graduate School of Medicine and Frontier Biosciences, Osaka University, 565-0871 Osaka, Japan; CREST, Japan Science and Technology Agency, 102-0076 Tokyo, Japan
| | - Penelope Ottewell
- Academic Unit of Clinical Oncology, University of Sheffield Medical School, Beech Hill Road, S10 2RX Sheffield, United Kingdom
| | - Fuka Mima
- Department of Immunology and Cell Biology, Graduate School of Medicine and Frontier Biosciences, Osaka University, 565-0871 Osaka, Japan; CREST, Japan Science and Technology Agency, 102-0076 Tokyo, Japan
| | - Raphael Leblanc
- INSERM, UMR1033, UCB Lyon 1, Faculté de Médecine Lyon Est, 69732 Lyon, France
| | - Edith Bonnelye
- INSERM, UMR1033, UCB Lyon 1, Faculté de Médecine Lyon Est, 69732 Lyon, France
| | - Johnny Ribeiro
- INSERM, UMR1033, UCB Lyon 1, Faculté de Médecine Lyon Est, 69732 Lyon, France
| | - Ingunn Holen
- Academic Unit of Clinical Oncology, University of Sheffield Medical School, Beech Hill Road, S10 2RX Sheffield, United Kingdom
| | - Rùben Lopez Vales
- Grup de Neuroplasticitat i Regeneració, Unitat de Fisiologia Mèdica, Facultat de Medicina, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain
| | - Pierre Jurdic
- CNRS, UMR5242, ENS, Équipe Biologie Cellulaire et Physiopathologie Osseuse, Institut de Génomique Fonctionnelle de Lyon, UCB Lyon 1, 69007 Lyon, France
| | - Jerold Chun
- Department of Molecular Biology, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, California 92037
| | - Philippe Clézardin
- INSERM, UMR1033, UCB Lyon 1, Faculté de Médecine Lyon Est, 69732 Lyon, France
| | - Masaru Ishii
- Department of Immunology and Cell Biology, Graduate School of Medicine and Frontier Biosciences, Osaka University, 565-0871 Osaka, Japan; CREST, Japan Science and Technology Agency, 102-0076 Tokyo, Japan
| | - Olivier Peyruchaud
- INSERM, UMR1033, UCB Lyon 1, Faculté de Médecine Lyon Est, 69732 Lyon, France.
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40
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Weichand B, Weis N, Weigert A, Grossmann N, Levkau B, Brüne B. Apoptotic cells enhance sphingosine-1-phosphate receptor 1 dependent macrophage migration. Eur J Immunol 2013; 43:3306-13. [PMID: 23934754 DOI: 10.1002/eji.201343441] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 07/05/2013] [Accepted: 08/06/2013] [Indexed: 11/10/2022]
Abstract
The lipid sphingosine-1-phosphate (S1P) is a chemokine for a variety of immune cells including lymphocytes and monocytes. Migration toward S1P is determined by the S1P receptor expression profile, with S1PR1/3 (where S1PR is S1P receptor) stimulating and S1PR2 attenuating migration. However, the impact and physiological significance of S1P-induced migration of macrophages is largely unclear. We observed that alternative activation of human macrophages, by IL-4 or apoptotic cells (ACs), enhanced S1PR1 expression. Moreover, ACs provoked macrophage migration toward S1P in an S1PR1-dependent manner as confirmed by pharmacological receptor inhibition and S1PR1-deficient murine macrophages. In a mouse model of resolving peritoneal inflammation, F4/80-driven deletion of S1PR1 reduced postinflammatory macrophage emigration from inflammatory sites. S1PR1 expression on macrophages might, therefore, be relevant for restoring tissue homeostasis during the resolution of inflammation.
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Affiliation(s)
- Benjamin Weichand
- Institute of Biochemistry I/ZAFES, Goethe-University Frankfurt, Frankfurt, Germany
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41
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Abstract
Resident leukocytes in the lungs of healthy individuals are necessary for the innate and adaptive immune response toward potentially harmful foreign antigens that are inhaled on a constant basis. Under normal circumstances, inflammatory stimuli are effectively eradicated via innate immunity with accompanying resolution of inflammation and repair of the lung tissue. Work in our lab has explored how Arhgef1, an intracellular signaling molecule expressed by hematopoietic cells, participates in immune function with an emphasis on its contribution to pulmonary immunity. This review summarizes our studies on the role of Arhgef1 in regulating pulmonary macrophage function.
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42
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Ortlepp C, Steudel C, Heiderich C, Koch S, Jacobi A, Ryser M, Brenner S, Bornhäuser M, Brors B, Hofmann WK, Ehninger G, Thiede C. Autotaxin is expressed in FLT3-ITD positive acute myeloid leukemia and hematopoietic stem cells and promotes cell migration and proliferation. Exp Hematol 2013; 41:444-461.e4. [DOI: 10.1016/j.exphem.2013.01.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 01/07/2013] [Accepted: 01/20/2013] [Indexed: 11/25/2022]
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Lewis ND, Haxhinasto SA, Anderson SM, Stefanopoulos DE, Fogal SE, Adusumalli P, Desai SN, Patnaude LA, Lukas SM, Ryan KR, Slavin AJ, Brown ML, Modis LK. Circulating monocytes are reduced by sphingosine-1-phosphate receptor modulators independently of S1P3. THE JOURNAL OF IMMUNOLOGY 2013; 190:3533-40. [PMID: 23436932 DOI: 10.4049/jimmunol.1201810] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Sphingosine-1-phosphate (S1P) receptors are critical for lymphocyte egress from secondary lymphoid organs, and S1P receptor modulators suppress lymphocyte circulation. However, the role of S1P receptors on monocytes is less clear. To elucidate this, we systematically evaluated monocytes in rats and mice, both in naive and inflammatory conditions, with S1P receptor modulators FTY720 and BAF312. We demonstrate that S1P receptor modulators reduce circulating monocytes in a similar time course as lymphocytes. Furthermore, total monocyte numbers were increased in the spleen and bone marrow, suggesting that S1P receptor modulation restricts egress from hematopoietic organs. Monocytes treated ex vivo with FTY720 had reduced CD40 expression and TNF-α production, suggesting a direct effect on monocyte activation. Similar reductions in protein expression and cytokine production were also found in vivo. Suppression of experimental autoimmune encephalomyelitis in mice and rats by FTY720 correlated with reduced numbers of lymphocytes and monocytes. These effects on monocytes were independent of S1P3, as treatment with BAF312, a S1P1,4,5 modulator, led to similar results. These data reveal a novel role for S1P receptors on monocytes and offer additional insights on the mechanism of action of S1P receptor modulators in disease.
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Affiliation(s)
- Nuruddeen D Lewis
- Department of Immunology and Inflammation, Boehringer Ingelheim Pharmaceuticals, Ridgefield, CT 06877, USA
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Liao W, Tan G, Zhu Z, Chen Q, Lou Z, Dong X, Zhang W, Pan W, Chai Y. Combined Metabonomic and Quantitative Real-Time PCR Analyses Reveal Systems Metabolic Changes in Jurkat T-Cells Treated with HIV-1 Tat Protein. J Proteome Res 2012; 11:5109-23. [DOI: 10.1021/pr300173c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Wenting Liao
- School of Pharmacy, Second Military Medical University, Shanghai 200433, China
- College of High Altitude
Military Medicine, Third Military Medical University, Chongqing 400038, China
| | - Guangguo Tan
- School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Zhenyu Zhu
- School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Qiuli Chen
- Department of Microbiology, Second Military Medical University, Shanghai 200433,
China
| | - Ziyang Lou
- School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Xin Dong
- School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Wei Zhang
- School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Wei Pan
- Department of Microbiology, Second Military Medical University, Shanghai 200433,
China
| | - Yifeng Chai
- School of Pharmacy, Second Military Medical University, Shanghai 200433, China
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Zhao YY, Cheng XL, Cui JH, Yan XR, Wei F, Bai X, Lin RC. Effect of ergosta-4,6,8(14),22-tetraen-3-one (ergone) on adenine-induced chronic renal failure rat: A serum metabonomic study based on ultra performance liquid chromatography/high-sensitivity mass spectrometry coupled with MassLynx i-FIT algorithm. Clin Chim Acta 2012; 413:1438-45. [DOI: 10.1016/j.cca.2012.06.005] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 05/30/2012] [Accepted: 06/01/2012] [Indexed: 12/19/2022]
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Sims SM, Panupinthu N, Lapierre DM, Pereverzev A, Dixon SJ. Lysophosphatidic acid: a potential mediator of osteoblast-osteoclast signaling in bone. Biochim Biophys Acta Mol Cell Biol Lipids 2012; 1831:109-16. [PMID: 22892679 DOI: 10.1016/j.bbalip.2012.08.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Accepted: 08/01/2012] [Indexed: 02/05/2023]
Abstract
Osteoclasts (bone resorbing cells) and osteoblasts (bone forming cells) play essential roles in skeletal development, mineral homeostasis and bone remodeling. The actions of these two cell types are tightly coordinated, and imbalances in bone formation and resorption can result in disease states, such as osteoporosis. Lysophosphatidic acid (LPA) is a potent bioactive phospholipid that influences a number of cellular processes, including proliferation, survival and migration. LPA is also involved in wound healing and pathological conditions, such as tumor metastasis and autoimmune disorders. During trauma, activated platelets are likely a source of LPA in bone. Physiologically, osteoblasts themselves can also produce LPA, which in turn promotes osteogenesis. The capacity for local production of LPA, coupled with the proximity of osteoblasts and osteoclasts, leads to the intriguing possibility that LPA acts as a paracrine mediator of osteoblast-osteoclast signaling. Here we summarize emerging evidence that LPA enhances the differentiation of osteoclast precursors, and regulates the morphology, resorptive activity and survival of mature osteoclasts. These actions arise through stimulation of multiple LPA receptors and intracellular signaling pathways. Moreover, LPA is a potent mitogen implicated in promoting the metastasis of breast and ovarian tumors to bone. Thus, LPA released from osteoblasts is potentially an important autocrine and paracrine mediator - physiologically regulating skeletal development and remodeling, while contributing pathologically to metastatic bone disease. This article is part of a Special Issue entitled Advances in Lysophospholipid Research.
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Affiliation(s)
- Stephen M Sims
- Department of Physiology and Pharmacology, The University of Western Ontario, London, Ontario, Canada.
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47
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Lim M, Choi SK, Cho YE, Yeon SI, Kim EC, Ahn DS, Lee YH. The role of sphingosine kinase 1/sphingosine-1-phosphate pathway in the myogenic tone of posterior cerebral arteries. PLoS One 2012; 7:e35177. [PMID: 22532844 PMCID: PMC3332110 DOI: 10.1371/journal.pone.0035177] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Accepted: 03/09/2012] [Indexed: 11/30/2022] Open
Abstract
Aims The goal of the current study was to determine whether the sphingosine kinase 1 (SK1)/sphingosine-1-phosphate (S1P) pathway is involved in myogenic vasoconstriction under normal physiological conditions. In the present study, we assessed whether endogenous S1P generated by pressure participates in myogenic vasoconstriction and which signaling pathways are involved in SK1/S1P-induced myogenic response under normal physiological conditions. Methods and Results We measured pressure-induced myogenic response, Ca2+ concentration, and 20 kDa myosin light chain phosphorylation (MLC20) in rabbit posterior cerebral arteries (PCAs). SK1 was expressed and activated by elevated transmural pressure in rabbit PCAs. Translocation of SK1 by pressure elevation was blocked in the absence of external Ca2+ and in the presence of mechanosensitive ion channel and voltage-sensitive Ca2+ channel blockers. Pressure-induced myogenic tone was inhibited in rabbit PCAs treated with sphingosine kinase inhibitor (SKI), but was augmented by treatment with NaF, which is an inhibitor of sphingosine-1-phosphate phosphohydrolase. Exogenous S1P further augmented pressure-induced myogenic responses. Pressure induced an increase in Ca2+ concentration leading to the development of myogenic tone, which was inhibited by SKI. Exogenous S1P further increased the pressure-induced increased Ca2+ concentration and myogenic tone, but SKI had no effect. Pressure- and exogenous S1P-induced myogenic tone was inhibited by pre-treatment with the Rho kinase inhibitor and NADPH oxidase inhibitors. Pressure- and exogenous S1P-induced myogenic tone were inhibited by pre-treatment with S1P receptor blockers, W146 (S1P1), JTE013 (S1P2), and CAY10444 (S1P3). MLC20 phosphorylation was increased when the transmural pressure was raised from 40 to 80 mmHg and exogenous S1P further increased MLC20 phosphorylation. The pressure-induced increase of MLC20 phosphorylation was inhibited by pre-treatment of arteries with SKI. Conclusions Our results suggest that the SK1/S1P pathway may play an important role in pressure-induced myogenic responses in rabbit PCAs under normal physiological conditions.
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Affiliation(s)
- Mihwa Lim
- Department of Physiology, College of Medicine, BK 21 Project for Medical Sciences, Yonsei University, Seoul, Korea
| | - Soo-Kyoung Choi
- Department of Physiology, College of Medicine, BK 21 Project for Medical Sciences, Yonsei University, Seoul, Korea
| | - Young-Eun Cho
- Department of Physiology, College of Medicine, BK 21 Project for Medical Sciences, Yonsei University, Seoul, Korea
| | - Soo-In Yeon
- Department of Physiology, College of Medicine, BK 21 Project for Medical Sciences, Yonsei University, Seoul, Korea
| | - Eok-Cheon Kim
- Department of Physiology, College of Medicine, BK 21 Project for Medical Sciences, Yonsei University, Seoul, Korea
| | - Duck-Sun Ahn
- Department of Physiology, College of Medicine, BK 21 Project for Medical Sciences, Yonsei University, Seoul, Korea
| | - Young-Ho Lee
- Department of Physiology, College of Medicine, BK 21 Project for Medical Sciences, Yonsei University, Seoul, Korea
- * E-mail:
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48
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Ley S, Weigert A, Weichand B, Henke N, Mille-Baker B, Janssen RAJ, Brüne B. The role of TRKA signaling in IL-10 production by apoptotic tumor cell-activated macrophages. Oncogene 2012; 32:631-40. [PMID: 22410777 DOI: 10.1038/onc.2012.77] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Tumor-associated macrophages (TAMs) are a major supportive component within neoplasms. Mechanisms of macrophage (MΦ) attraction and differentiation to a tumor-promoting phenotype, which is characterized by pronounced interleukin (IL)-10 production, are under investigation. We report that supernatants of dying cancer cells induced substantial IL-10 release from primary human MΦs, dependent on signaling through tyrosine kinase receptor A (TRKA or neurotrophic tyrosine kinase receptor type 1 (NTRK1)). Mechanistically, sphingosine-1-phosphate (S1P) release from apoptotic cancer cells triggered src-dependent shuttling of cytosolic TRKA to the plasma membrane via S1P receptor signaling. Plasma membrane-associated TRKA, which was activated by constitutively autocrine secreted nerve growth factor, used phosphatidylinositol 3-kinase (PI3K)/AKT and p38 mitogen-activated protein kinase (MAPK) signaling to induce IL-10. Interestingly, TRKA-dependent signaling was required for cytokine production by TAMs isolated from primary murine breast cancer tissue. Besides IL-10, this pathway initiated secretion of IL-6, tumor necrosis factor-α (TNF-α) and monocyte chemotactic protein-1 (MCP-1), indicating relevance in cancer-associated inflammation. Our findings highlight a fine-tuned regulatory system including S1P-dependent TRKA trafficking for executing TAM-like cell function in vitro as well as in vivo.
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Affiliation(s)
- S Ley
- Institute of Biochemistry I/ZAFES, Goethe-University Frankfurt, Frankfurt, Germany
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Ley S, Weigert A, Hériché JK, Mille-Baker B, Janssen RAJ, Brüne B. RNAi screen in apoptotic cancer cell-stimulated human macrophages reveals co-regulation of IL-6/IL-10 expression. Immunobiology 2012; 218:40-51. [PMID: 22445721 DOI: 10.1016/j.imbio.2012.01.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Revised: 01/24/2012] [Accepted: 01/27/2012] [Indexed: 01/05/2023]
Abstract
Tumor-associated macrophages (TAM) are a major supportive component within neoplasms and are characterized by a plethora of functions that facilitate tumor outgrowth. Mechanisms of macrophage attraction and differentiation to a tumor-promoting phenotype, defined among others by distinct cytokine patterns such as pronounced interleukin (IL-10) production, are ill-defined. We aimed to identify signaling pathways that contribute to the generation of TAM-like macrophages using an adenoviral RNAi-based approach. Primary human monocyte-derived macrophages were stimulated with apoptotic tumor cell supernatants (ACM) to induce a TAM-like phenotype, characterized by secretion of IL-10, IL-6, IL-8 but repression of IL-12. For the high-throughput screen, macrophages were transduced with 8495 constructs of the adenoviral shRNA SilenceSelect(®) library of Galapagos BV, which aims at identifying druggable targets. We identified 96 genes involved in IL-10 production in response to ACM and observed a pronounced cluster of targets regulating both IL-10 and IL-6. Validation of five targets within the IL-10/IL-6 cluster was performed using siRNA or pharmacological inhibitors in human primary macrophages. Among those, interleukin 4 receptor-α and cannabinoid receptor 2 were confirmed as regulators of IL-10 and IL-6 secretion by ACM-stimulated macrophages. Our approach characterizes cellular functions of transfection-resistant, highly plastic and versatile cells and identifies novel targets involved in the generation of a TAM-like phenotype in human macrophages.
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Affiliation(s)
- Stephanie Ley
- Goethe-University Frankfurt, Institute of Biochemistry I/ZAFES, Theodor-Stern-Kai 7, 60590 Frankfurt, Germany
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Hartney JM, Gustafson CE, Bowler RP, Pelanda R, Torres RM. Thromboxane receptor signaling is required for fibronectin-induced matrix metalloproteinase 9 production by human and murine macrophages and is attenuated by the Arhgef1 molecule. J Biol Chem 2011; 286:44521-31. [PMID: 22086927 DOI: 10.1074/jbc.m111.282772] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
During an inflammatory response, resident and newly recruited tissue macrophages adhere to extracellular matrix and cell-bound integrin ligands. This interaction induces the expression of pro-inflammatory mediators that include matrix metalloproteinases (MMPs). Arhgef1 is an intracellular signaling molecule expressed by myeloid cells that normally attenuates murine macrophage MMP production in vivo and in vitro after cell culture on the extracellular matrix protein, fibronectin. In this study, we have extended the characterization of this fibronectin-induced Arhgef1-regulated signaling pathway in both human and murine myeloid cells. Our results show that MMP9 production by fibronectin-stimulated monocytes and macrophages depends on autocrine thromboxane receptor signaling and that under normal conditions, this signaling pathway is attenuated by Arhgef1. Finally, we show that the expression of ARHGEF1 by human peripheral blood monocytes varies between individuals and inversely correlates with fibronectin-mediated MMP9 production.
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Affiliation(s)
- John M Hartney
- Integrated Department of Immunology, National Jewish Health and University of Colorado School of Medicine, Denver, Colorado 80206, USA
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