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Almog T, Keshet R, Kandel-Kfir M, Shaish A, Apte RN, Harats D, Kamari Y. Gene deletion of Interleukin-1α reduces ER stress-induced CHOP expression in macrophages and attenuates the progression of atherosclerosis in apoE-deficient mice. Cytokine 2023; 167:156212. [PMID: 37146542 DOI: 10.1016/j.cyto.2023.156212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 03/26/2023] [Accepted: 04/14/2023] [Indexed: 05/07/2023]
Abstract
The pathophysiology of atherosclerosis initiation and progression involves many inflammatory cytokines, one of them is interleukin (IL)-1α that has been shown to be secreted by activated macrophages. We have previously shown that IL-1α from bone marrow-derived cells is critical for early atherosclerosis development in mice. It is known that endoplasmic reticulum (ER) stress in macrophages is involved in progression to more advanced atherosclerosis, but it is still unknown whether this effect is mediated through cytokine activation or secretion. We previously demonstrated that IL-1α is required in ER stress-induced activation of inflammatory cytokines in hepatocytes and in the associated induction of steatohepatitis. In the current study, we aimed to examine the potential role of IL-1α in ER stress-induced activation of macrophages, which is relevant to progression of atherosclerosis. First, we demonstrated that IL-1α is required for atherosclerosis development and progression in the apoE knockout (KO) mouse model of atherosclerosis. Next, we showed that ER stress in mouse macrophages results in the protein production and secretion of IL-1α in a dose-dependent manner, and that IL-1α is required in ER stress-induced production of the C/EBP homologous protein (CHOP), a critical step in ER stress-mediated apoptosis. We further demonstrated that IL-1α-dependent CHOP production in macrophages is specifically mediated through the PERK-ATF4 signaling pathway. Altogether, these findings highlight IL-1α as a potential target for prevention and treatment of atherosclerotic cardiovascular disease.
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Affiliation(s)
- Tal Almog
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel-Hashomer, Israel
| | - Rom Keshet
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel-Hashomer, Israel
| | - Michal Kandel-Kfir
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel-Hashomer, Israel
| | - Aviv Shaish
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel-Hashomer, Israel; Achva Academic College, Israel
| | - Ron N Apte
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Dror Harats
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel-Hashomer, Israel; Sackler Faculty of Medicine, Tel-Aviv University, Israel
| | - Yehuda Kamari
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel-Hashomer, Israel; Sackler Faculty of Medicine, Tel-Aviv University, Israel.
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Jrad AIS, Trad M, Bzeih W, El Hasbani G, Uthman I. Role of pro-inflammatory interleukins in osteoarthritis: a narrative review. Connect Tissue Res 2022; 64:238-247. [PMID: 36541851 DOI: 10.1080/03008207.2022.2157270] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
PURPOSE This manuscript will summarize the role of pro-inflammatory cytokines and tackle newly discussed ones within the scope of OA pathogenesis as mentioned in the recent literature. This will allow for a better understanding of the mechanisms behind such a complicated disease. MATERIAL AND METHODS Relevant articles were obtained by searching key terms including "pro-inflammatory cytokines," "inflammation," "pathophysiology," "cartilage damage," and "OA" in PubMed and Google Scholar databases. The year ranges set for the selection of the articles was between 2015 -2021. Inclusion criteria was based on the relevance and contribution to the field of the study. RESULTS Osteoarthritis (OA) has a complex multifactorial pathophysiology which is attributed to molecular and biomechanical changes that disrupt the normal balance of synthesis and degradation of articular cartilage and subchondral bone. Pro-inflammatory cytokines, with their wide range of action and intricate signaling pathways, are the constant subject of new discoveries revolving around this inflammatory disease. The available literature indicates that some of these cytokines such as IL-33, IL-17, IL-6, and IL-22 have a direct relation to cartilage degradation, while others like IL-15, IL-1, IL-7, and IL-34 have an indirect one. CONCLUSIONS Inflammation has an essential role in the manifestation of osteoarthritis clinical events. Specifically, certain cytokines exhibit pro-inflammatory properties that are markedly activated during the course of the disease and notably alter the homeostasis of the joint environment. However, clinical trials and observational studies remain insufficient to navigate the varying nature of this disease in humans.
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Affiliation(s)
| | - Maha Trad
- Faculty of Medical Sciences, Lebanese University, Hadath, Lebanon
| | - Wafaa Bzeih
- Faculty of Medical Sciences, Lebanese University, Hadath, Lebanon
| | - Georges El Hasbani
- Department of Internal Medicine, St. Vincent's Medical Center, Bridgeport, CT, USA
| | - Imad Uthman
- Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon
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Malireddi RS, Bynigeri RR, Kancharana B, Sharma BR, Burton AR, Pelletier S, Kanneganti TD. Determining distinct roles of IL-1α through generation of an IL-1α knockout mouse with no defect in IL-1β expression. Front Immunol 2022; 13:1068230. [PMID: 36505497 PMCID: PMC9729281 DOI: 10.3389/fimmu.2022.1068230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 11/10/2022] [Indexed: 11/25/2022] Open
Abstract
Interleukin 1α (IL-1α) and IL-1β are the founding members of the IL-1 cytokine family, and these innate immune inflammatory mediators are critically important in health and disease. Early studies on these molecules suggested that their expression was interdependent, with an initial genetic model of IL-1α depletion, the IL-1α KO mouse (Il1a-KOline1), showing reduced IL-1β expression. However, studies using this line in models of infection and inflammation resulted in contrasting observations. To overcome the limitations of this genetic model, we have generated and characterized a new line of IL-1α KO mice (Il1a-KOline2) using CRISPR-Cas9 technology. In contrast to cells from Il1a-KOline1, where IL-1β expression was drastically reduced, bone marrow-derived macrophages (BMDMs) from Il1a-KOline2 mice showed normal induction and activation of IL-1β. Additionally, Il1a-KOline2 BMDMs showed normal inflammasome activation and IL-1β expression in response to multiple innate immune triggers, including both pathogen-associated molecular patterns and pathogens. Moreover, using Il1a-KOline2 cells, we confirmed that IL-1α, independent of IL-1β, is critical for the expression of the neutrophil chemoattractant KC/CXCL1. Overall, we report the generation of a new line of IL-1α KO mice and confirm functions for IL-1α independent of IL-1β. Future studies on the unique functions of IL-1α and IL-1β using these mice will be critical to identify new roles for these molecules in health and disease and develop therapeutic strategies.
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Qian S, Han X, Sha X, Tian F, Huang H, Jiang P, Huang G, Ma B, Zhang H, Zhu Y, Sun X. Aqueous Extract of Cimicifuga dahurica Reprogramming Macrophage Polarization by Activating TLR4-NF-κB Signaling Pathway. J Inflamm Res 2022; 15:1027-1046. [PMID: 35210810 PMCID: PMC8858003 DOI: 10.2147/jir.s345497] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 01/20/2022] [Indexed: 12/16/2022] Open
Abstract
Purpose Cimicifuga dahurica (C. dahurica), which has been used in traditional oriental medicine for a long period, was reported to exert extensive antitumor activity, but the effect and molecular biological mechanism of C. dahurica on multiple myeloma (MM) has not been elaborated. Tumor-associated macrophages (TAMs) exhibit a sustained polarization between tumor killing M1 subtype and tumor supporting M2 subtype. And a lower ratio of M1/M2 is associated with tumor angiogenesis, proliferation and invasion. We explored the inhibitory effect of the aqueous extract of the root of C. dahurica (CRAE) on tumor growth by reprogramming macrophage polarization in the tumor microenvironment. Methods Mice bearing SP2/0 multiple myeloma were treated with CRAE. Western blotting (WB), immunohistochemistry (IHC) and immunofluorescence staining were utilized to assess tumor growth and TAM populations. Macrophages were depleted by injection of clodronate liposomes to determine and measure the role of CRAE as an anti-tumor agent by targeting macrophages. To simulate tumor microenvironment, MM cells H929 and TAMs were co-cultured using the transwell co-culture system. By using CRAE as an immunoregulator in M2-like macrophages, we analyzed CRAE-treated macrophage-associated surface markers and cytokines by flow cytometry and WB. Results The results indicated that CRAE treatment could reduce tumor burden of MM mice and a high degree of M1-like macrophages infiltration was detected in tumor tissues. In vitro co-culture system, CRAE significantly promoted the polarization of M2 to M1 phenotype, which led to the increase in apoptosis of myeloma cells. It was found that the M1 polarization induced by CRAE depended on the TLR4-MyD88-TAK1-NF-κB signal transduction. Conclusion This study elucidated the anticancer mechanism of the aqueous extract of C. dahurica (CRAE) through reprogramming macrophage polarization and highlighted that CRAE could act as a potential novel option for cancer immunotherapy.
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Affiliation(s)
- Shushu Qian
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
| | - Xuan Han
- School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
| | - Xiaocao Sha
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
| | - Fang Tian
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
| | - Hong Huang
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
| | - Pengjun Jiang
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
| | - Guoshun Huang
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
| | - Bangyun Ma
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
| | - Hong Zhang
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
| | - Yiye Zhu
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
| | - Xuemei Sun
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, People’s Republic of China
- Correspondence: Xuemei Sun, Tel +86-25-86617141, Fax +86-25-86518690, Email
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Dagvadorj J, Mikulska-Ruminska K, Tumurkhuu G, Ratsimandresy RA, Carriere J, Andres AM, Marek-Iannucci S, Song Y, Chen S, Lane M, Dorfleutner A, Gottlieb RA, Stehlik C, Cassel S, Sutterwala FS, Bahar I, Crother TR, Arditi M. Recruitment of pro-IL-1α to mitochondrial cardiolipin, via shared LC3 binding domain, inhibits mitophagy and drives maximal NLRP3 activation. Proc Natl Acad Sci U S A 2021; 118:e2015632118. [PMID: 33361152 PMCID: PMC7817159 DOI: 10.1073/pnas.2015632118] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The balance between NLRP3 inflammasome activation and mitophagy is essential for homeostasis and cellular health, but this relationship remains poorly understood. Here we found that interleukin-1α (IL-1α)-deficient macrophages have reduced caspase-1 activity and diminished IL-1β release, concurrent with reduced mitochondrial damage, suggesting a role for IL-1α in regulating this balance. LPS priming of macrophages induced pro-IL-1α translocation to mitochondria, where it directly interacted with mitochondrial cardiolipin (CL). Computational modeling revealed a likely CL binding motif in pro-IL-1α, similar to that found in LC3b. Thus, binding of pro-IL-1α to CL in activated macrophages may interrupt CL-LC3b-dependent mitophagy, leading to enhanced Nlrp3 inflammasome activation and more robust IL-1β production. Mutation of pro-IL-1α residues predicted to be involved in CL binding resulted in reduced pro-IL-1α-CL interaction, a reduction in NLRP3 inflammasome activity, and increased mitophagy. These data identify a function for pro-IL-1α in regulating mitophagy and the potency of NLRP3 inflammasome activation.
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Affiliation(s)
- Jargalsaikhan Dagvadorj
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Karolina Mikulska-Ruminska
- Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, PA 15213
- Institute of Physics, Faculty of Physics Astronomy and Informatics, Nicolaus Copernicus University in Toruń, 87-100 Torun, Poland
| | - Gantsetseg Tumurkhuu
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | | | - Jessica Carriere
- Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Allen M Andres
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Stefanie Marek-Iannucci
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Yang Song
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Shuang Chen
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics. David Geffen School of Medicine at University of California, Los Angeles, CA 90095
| | - Malcolm Lane
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Andrea Dorfleutner
- Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Roberta A Gottlieb
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Christian Stehlik
- Department of Pathology, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Suzanne Cassel
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Lung Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Fayyaz S Sutterwala
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Lung Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - Ivet Bahar
- Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, PA 15213;
| | - Timothy R Crother
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048;
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics. David Geffen School of Medicine at University of California, Los Angeles, CA 90095
| | - Moshe Arditi
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048;
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Infectious and Immunologic Diseases Research Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048
- Department of Pediatrics. David Geffen School of Medicine at University of California, Los Angeles, CA 90095
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Almog T, Kandel Kfir M, Levkovich H, Shlomai G, Barshack I, Stienstra R, Lustig Y, Leikin Frenkel A, Harari A, Bujanover Y, Apte R, Shaish A, Harats D, Kamari Y. Interleukin-1α deficiency reduces adiposity, glucose intolerance and hepatic de-novo lipogenesis in diet-induced obese mice. BMJ Open Diabetes Res Care 2019; 7:e000650. [PMID: 31749969 PMCID: PMC6827792 DOI: 10.1136/bmjdrc-2019-000650] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 09/04/2019] [Accepted: 09/06/2019] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVE While extensive research revealed that interleukin (IL)-1β contributes to insulin resistance (IR) development, the role of IL-1α in obesity and IR was scarcely studied. Using control, whole body IL-1α knockout (KO) or myeloid-cell-specific IL-1α-deficient mice, we tested the hypothesis that IL-1α deficiency would protect against high-fat diet (HFD)-induced obesity and its metabolic consequences. RESEARCH DESIGN AND METHODS To induce obesity and IR, control and IL-1α KO mice were given either chow or HFD for 16 weeks. Glucose tolerance test was performed at 10 and 15 weeks, representing early and progressive stages of glucose intolerance, respectively. Liver and epididymal white adipose tissue (eWAT) samples were analyzed for general morphology and adipocyte size. Plasma levels of adiponectin, insulin, total cholesterol and triglyceride (TG), lipoprotein profile as well as hepatic lipids were analyzed. Expression of lipid and inflammation-related genes in liver and eWAT was analyzed. Primary mouse hepatocytes isolated from control mice were treated either with dimethyl sulfoxide (DMSO) (control) or 20 ng/mL recombinant IL-1α for 24 hours and subjected to gene expression analysis. RESULTS Although total body weight gain was similar, IL-1α KO mice showed reduced adiposity and were completely protected from HFD-induced glucose intolerance. In addition, plasma total cholesterol and TG levels were lower and HFD-induced accumulation of liver TGs was completely inhibited in IL-1α KO compared with control mice. Expression of stearoyl-CoA desaturase1 (SCD1), fatty acid synthase (FASN), elongation of long-chain fatty acids family member 6 (ELOVL6), acetyl-CoA carboxylase (ACC), key enzymes that promote de-novo lipogenesis, was lower in livers of IL-1α KO mice. Treatment with recombinant IL-1α elevated the expression of ELOVL6 and FASN in mouse primary hepatocytes. Finally, mice with myeloid-cell-specific deletion of IL-1α did not show reduced adiposity and improved glucose tolerance. CONCLUSIONS We demonstrate a novel role of IL-1α in promoting adiposity, obesity-induced glucose intolerance and liver TG accumulation and suggest that IL-1α blockade could be used for treatment of obesity and its metabolic consequences.
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Affiliation(s)
- Tal Almog
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Michal Kandel Kfir
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Hana Levkovich
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Gadi Shlomai
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Iris Barshack
- The Pathology Department, Sheba Medical Center, Tel Hashomer, Israel
- Departments of Medicine and Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Rinke Stienstra
- Department of Medicine, Radboud University, Nijmegen, The Netherlands
- Department of Human Nutrition, Wageningen University, Wageningen, The Netherlands
| | - Yaniv Lustig
- The Institute of Endocrinology, Sheba Medical Center, Tel Hashomer, Israel
| | - Alicia Leikin Frenkel
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel Hashomer, Israel
- Departments of Medicine and Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ayelet Harari
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Yoram Bujanover
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Roni Apte
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Aviv Shaish
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel Hashomer, Israel
- Department of life sciences, Achva Academic College, Shikmim, Israel
| | - Dror Harats
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel Hashomer, Israel
- Departments of Medicine and Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yehuda Kamari
- The Bert W. Strassburger Lipid Center, Sheba Medical Center, Tel Hashomer, Israel
- Departments of Medicine and Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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7
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van Dalen SCM, Blom AB, Slöetjes AW, Helsen MMA, Roth J, Vogl T, van de Loo FAJ, Koenders MI, van der Kraan PM, van den Berg WB, van den Bosch MHJ, van Lent PLEM. Interleukin-1 is not involved in synovial inflammation and cartilage destruction in collagenase-induced osteoarthritis. Osteoarthritis Cartilage 2017; 25:385-396. [PMID: 27654963 DOI: 10.1016/j.joca.2016.09.009] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 09/05/2016] [Accepted: 09/12/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Interleukin-1 (IL-1) is an alleged important cytokine in osteoarthritis (OA), although the exact contribution of IL-1 to joint destruction remains unclear. Here we investigated the involvement of IL-1α and IL-1β in joint pathology during collagenase-induced OA (CiOA). METHODS CiOA was induced in wild type (WT) and IL-1αβ-/- mice. Additionally, IL-1 signaling was inhibited in WT mice with CiOA using osmotic pumps containing IL-1RA. Joint pathology was assessed using histology. Activity of cartilage-degrading enzymes was determined using antibodies against aggrecan neo-epitopes VDIPEN and NITEGE. Synovial gene expression was analyzed using quantitative real-time polymerase chain reaction (qRT-PCR). Serum protein levels were measured with Luminex or enzyme-linked immunosorbent assay (ELISA). RESULTS Synovial IL-1β expression was strongly elevated 7 days after induction of CiOA in WT mice but decreased afterwards, whereas S100A8/A9, previously described to aggravate OA, remained elevated for 21 days. Remarkably, synovial inflammation was comparable between WT and IL-1αβ-/- mice on day 7 of CiOA. In line, synovial mRNA expression of genes involved in IL-1 signaling and inflammatory mediators was comparable between WT and IL-1αβ-/- mice, and serum levels for Keratinocyte Chemoattractant (KC)/IL-6/S100A8/S100A9/IL-10 were equal. Synovial matrix metalloproteinase (MMP)/aggrecanase expression and activity in cartilage was not different in WT and IL-1αβ-/- mice on day 7 of CiOA. Cartilage destruction on day 42 was not different between WT and IL-1αβ-/- mice, which was supported by our finding that IL-1RA treatment in WT mice with CiOA did not alter joint destruction. CONCLUSIONS IL-1α and IL-1β are not involved in synovial inflammation and cartilage destruction during CiOA, implicating that other mediators are responsible for the joint damage.
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Affiliation(s)
- S C M van Dalen
- Experimental Rheumatology, Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - A B Blom
- Experimental Rheumatology, Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - A W Slöetjes
- Experimental Rheumatology, Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - M M A Helsen
- Experimental Rheumatology, Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - J Roth
- Institute of Immunology, University of Münster, Münster, Germany.
| | - T Vogl
- Institute of Immunology, University of Münster, Münster, Germany.
| | - F A J van de Loo
- Experimental Rheumatology, Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - M I Koenders
- Experimental Rheumatology, Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - P M van der Kraan
- Experimental Rheumatology, Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - W B van den Berg
- Experimental Rheumatology, Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - M H J van den Bosch
- Experimental Rheumatology, Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - P L E M van Lent
- Experimental Rheumatology, Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands.
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8
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Improved Chemotherapeutic Activity by Morus alba Fruits through Immune Response of Toll-Like Receptor 4. Int J Mol Sci 2015; 16:24139-58. [PMID: 26473845 PMCID: PMC4632743 DOI: 10.3390/ijms161024139] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 09/23/2015] [Accepted: 10/07/2015] [Indexed: 11/21/2022] Open
Abstract
Morus alba L. fruits have long been used in traditional medicine by many cultures. Their medicinal attributes include cardiovascular, hepatoprotective, neuroprotective and immunomodulatory actions. However, their mechanism of macrophage activation and anti-cancer effects remain unclear. The present study investigated the molecular mechanisms of immune stimulation and improved chemotherapeutic effect of M. alba L. fruit extract (MFE). MFE stimulated the production of cytokines, nitric oxide (NO) and tumor necrosis factor-α (TNF-α) and tumoricidal properties of macrophages. MFE activated macrophages through the mitogen-activated protein kinase (MAPKinase) and nuclear factor-κB (NF-κB) signaling pathways downstream from toll-like receptor (TLR) 4. MFE was shown to exhibit cytotoxicity of CT26 cells via the activated macrophages, even though MFE did not directly affect CT26 cells. In a xenograft mouse model, MFE significantly enhanced anti-cancer activity combined with 5-fluorouracil and markedly promoted splenocyte proliferation, natural killer (NK) cell activity, cytotoxic T lymphocyte (CTL) activity and IFN-γ production. Immunoglobulin G (IgG) antibody levels were significantly increased. These results indicate the indirect anti-cancer activity of MFE through improved immune response mediated by TLR4 signaling. M. alba L. fruit extract might be a potential anti-tumor immunomodulatory candidate chemotherapy agent.
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