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Ivanjko N, Stokovic N, Milesevic M, Rumenovic V, Windhager R, Sampath KT, Kovacic N, Grcevic D, Vukicevic S. rhBMP6 in autologous blood coagulum is a preferred osteoinductive device to rhBMP2 on bovine collagen sponge in the rat ectopic bone formation assay. Biomed Pharmacother 2023; 169:115844. [PMID: 37948990 DOI: 10.1016/j.biopha.2023.115844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/02/2023] [Accepted: 11/05/2023] [Indexed: 11/12/2023] Open
Abstract
Osteoinductive BMPs require a suitable delivery system for treating various pathological conditions of the spine and segmental bone defects. INFUSE, the only commercially available BMP-based osteoinductive device, consisting of rhBMP2 on bovine absorbable collagen sponge (ACS) showed major disadvantages due to serious side effects. A novel osteoinductive device, OSTEOGROW, comprised of rhBMP6 dispersed within autologous blood coagulum (ABC) is a promising therapy for bone regeneration, subjected to several clinical trials for diaphysial bone repair and spinal fusion. In the present study, we have examined the release dynamics showing that the ABC carrier provided a slower, more steady BMP release in comparison to the ACS. Rat subcutaneous assay was employed to evaluate cellular events and the time course of ectopic osteogenesis. The host cellular response to osteoinductive implants was evaluated by flow cytometry, while dynamics of bone formation and maintenance in time were evaluated by histology, immunohistochemistry and micro CT analyses. Flow cytometry revealed that the recruitment of lymphoid cell populations was significantly higher in rhBMP6/ABC implants, while rhBMP2/ACS implants recruited more myeloid populations. Furthermore, rhBMP6/ABC implants more efficiently attracted early and committed progenitor cells. Dynamics of bone formation induced by rhBMP2/ACS was characterized by a delayed endochondral ossification process in comparison to rhBMP6/ABC implants. Besides, rhBMP6/ABC implants induced more ectopic bone volume in all observed time points in comparison to rhBMP2/ACS implants. These results indicate that OSTEOGROW was superior to INFUSE due to ABC's advantages as a carrier and rhBMP6 superior efficacy in inducing bone.
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Affiliation(s)
- Natalia Ivanjko
- Laboratory for Mineralized Tissues, School of Medicine, University of Zagreb, Zagreb, Croatia; Scientific Center of Excellence for Reproductive and Regenerative Medicine, Zagreb, Croatia
| | - Nikola Stokovic
- Laboratory for Mineralized Tissues, School of Medicine, University of Zagreb, Zagreb, Croatia; Scientific Center of Excellence for Reproductive and Regenerative Medicine, Zagreb, Croatia
| | - Marina Milesevic
- Laboratory for Mineralized Tissues, School of Medicine, University of Zagreb, Zagreb, Croatia; Scientific Center of Excellence for Reproductive and Regenerative Medicine, Zagreb, Croatia
| | - Viktorija Rumenovic
- Laboratory for Mineralized Tissues, School of Medicine, University of Zagreb, Zagreb, Croatia; Scientific Center of Excellence for Reproductive and Regenerative Medicine, Zagreb, Croatia
| | - Reinhard Windhager
- Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Vienna, Austria
| | | | - Natasa Kovacic
- Croatian Institute for Brain Research, Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Danka Grcevic
- Croatian Institute for Brain Research, Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Slobodan Vukicevic
- Laboratory for Mineralized Tissues, School of Medicine, University of Zagreb, Zagreb, Croatia; Scientific Center of Excellence for Reproductive and Regenerative Medicine, Zagreb, Croatia.
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Wu YJ, Zhang SS, Yin Q, Lei M, Wang QH, Chen WG, Luo TT, Zhou P, Ji CL. α-Mangostin Inhibited M1 Polarization of Macrophages/Monocytes in Antigen-Induced Arthritis Mice by Up-Regulating Silent Information Regulator 1 and Peroxisome Proliferators-Activated Receptor γ Simultaneously. Drug Des Devel Ther 2023; 17:563-577. [PMID: 36860800 PMCID: PMC9969869 DOI: 10.2147/dddt.s397914] [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: 11/16/2022] [Accepted: 02/20/2023] [Indexed: 02/24/2023] Open
Abstract
Background α-Mangostin (MG) showed the potentials in alleviating experimental arthritis, inhibiting inflammatory polarization of macrophages/monocytes, and regulating peroxisome proliferators-activated receptor γ (PPAR-γ) and silent information regulator 1 (SIRT1) signals. The aim of this study was to analyze the correlations among the above-mentioned properties. Methods Antigen-induced arthritis (AIA) was established in mouse, which was treated with MG in combination with SIRT1/PPAR-γ inhibitors to clarify the role of the two signals in the anti-arthritic actions. Pathological changes were systematically investigated. Phenotypes of cells were investigated by flow cytometry. Expression and co-localization of SIRT1 and PPAR-γ proteins in joint tissues were observed by the immunofluorescence method. Finally, clinical implications from the synchronous up-regulation of SIRT1 and PPAR-γ were validated by experiments in vitro. Results SIRT1 and PPAR-γ inhibitors (nicotinamide and T0070097) reduced the therapeutic effects of MG on AIA mice, and abrogated MG-induced up-regulation of SIRT1/PPAR-γ and inhibition of M1 polarization in macrophages/monocytes. MG has a good binding affinity to PPAR-γ, and MG promoted the co-expression of SIRT1 and PPAR-γ in joints. Synchronously activating SIRT1 and PPAR-γ was revealed to be necessary by MG to repress inflammatory responses in THP-1 monocytes. Conclusion MG binds PPAR-γ and excites this signaling to initiate ligand-dependent anti-inflammatory activity. Due to certain unspecified signal transduction crosstalk mechanism, it then promoted SIRT1 expression and further limited inflammatory polarization of macrophages/monocytes in AIA mice.
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Affiliation(s)
- Yi-Jin Wu
- Department of Pharmacy, The Second Affiliated Hospital of Wannan Medical College, Wuhu, 241000, People’s Republic of China,Xin’an Medical Research Center, The First Affiliated Hospital of Wannan Medical College, Wuhu, 241000, People’s Republic of China,Vascular Diseases Research Center of Wannan Medical College, Wuhu, 241000, People’s Republic of China
| | - Sa-Sa Zhang
- Department of Pharmacy, The Second Affiliated Hospital of Wannan Medical College, Wuhu, 241000, People’s Republic of China
| | - Qin Yin
- Department of Pharmacy, The Second Affiliated Hospital of Wannan Medical College, Wuhu, 241000, People’s Republic of China
| | - Ming Lei
- Xin’an Medical Research Center, The First Affiliated Hospital of Wannan Medical College, Wuhu, 241000, People’s Republic of China
| | - Qi-Hai Wang
- School of Pharmacy, Anhui College of Traditional Chinese Medicine, Wuhu, Anhui, 241000, People’s Republic of China
| | - Wen-Gang Chen
- Department of Pharmacy, The Second Affiliated Hospital of Wannan Medical College, Wuhu, 241000, People’s Republic of China
| | - Ting-Ting Luo
- Department of Pharmacy, The Second Affiliated Hospital of Wannan Medical College, Wuhu, 241000, People’s Republic of China
| | - Peng Zhou
- School of Integrated Chinese and Western Medicine, Anhui University of Chinese Medicine, Hefei, 230000, People’s Republic of China,Correspondence: Peng Zhou; Cong-Lan Ji, Email ;
| | - Cong-Lan Ji
- School of Pharmacy, Anhui College of Traditional Chinese Medicine, Wuhu, Anhui, 241000, People’s Republic of China,Research Center of Integration of Traditional Chinese and Western Medicine, Wannan Medical College, Wuhu, 241000, People’s Republic of China
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Wang R, Ji CL, Feng DD, Wu YJ, Li Y, Olatunji OJ, Yu LJ, Zuo J. Consumption of Saturated Fatty Acids-Rich Lard Benefits Recovery of Experimental Arthritis by Activating PPAR-γ. Mol Nutr Food Res 2023; 67:e2200429. [PMID: 36433679 DOI: 10.1002/mnfr.202200429] [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: 06/30/2022] [Revised: 10/15/2022] [Indexed: 11/27/2022]
Abstract
SCOPE This study investigates the impacts of lard and related fatty acids intake on rheumatoid arthritis (RA) animal models. METHOD AND RESULTS Collagen-induced arthritis (CIA) and adjuvant-induced arthritis (AIA) are induced in SD rats and C57 BL/6 mice respectively, which are fed by lard-rich diet (LRD) for 42 days with intake restriction or not. AIA SD rats are treated by representative fatty acids for 30 days. Body weight, arthritis score, and metabolic profile are periodically recorded. Monocyte distribution, cytokine/metabolites levels, gene expression, and tissue damages are investigated by flow cytometry, ELISA, colorimetry, PCR, and histological methods. After being treated by fatty acids in vitro, THP-1 monocytes and the corresponding medium are collected for ELISA, PCR, immunoblotting, and reporter gene assays. Irrespective of intake amounts, LRD decreases inflammatory cytokines and inhibits glycolysis in all rheumatic rodents. Furthermore, it alters monocyte distribution and promotes PPAR-γ expression in AIA mice. Overall evidences show that both saturated (SF) and unsaturated fatty acids (USF) from lard can attenuate inflammation by activating PPAR-γ. Silencing PPAR-γ abrogates their anti-inflammatory effects in vitro. Besides, SF can stimulate TLR4/NF-κB pathway. CONCLUSION Lard consumption is beneficial for active inflammatory arthritis recovery. Even SF can activate PPAR-γ and consequently attenuate inflammation.
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Affiliation(s)
- Rui Wang
- Xin'an Medicine Research Center, the First Affiliated Hospital of Wannan Medical College (Yijishan Hospital), Wuhu, 241000, China
| | - Cong-Lan Ji
- School of Pharmacy, Anhui College of Traditional Chinese Medicine, Wuhu, Anhui, 241000, China
| | - Dan-Dan Feng
- Department of Rheumatology, the First Affiliated Hospital of Wannan Medical College (Yijishan Hospital), Wuhu, 241000, China
| | - Yi-Jin Wu
- Research Center of Integration of Traditional Chinese and Western Medicine, Wannan Medical College, Wuhu, 241000, China
| | - Yan Li
- Xin'an Medicine Research Center, the First Affiliated Hospital of Wannan Medical College (Yijishan Hospital), Wuhu, 241000, China
| | - Opeyemi Joshua Olatunji
- Traditional Thai Medical Research and Innovation Center, Faculty of Traditional Thai Medicine, Prince of Songkla University, Hat Yai, 90110, Thailand
| | - Li-Jun Yu
- Research Center of Integration of Traditional Chinese and Western Medicine, Wannan Medical College, Wuhu, 241000, China
| | - Jian Zuo
- Xin'an Medicine Research Center, the First Affiliated Hospital of Wannan Medical College (Yijishan Hospital), Wuhu, 241000, China.,Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College, Wuhu, 241000, China.,Anhui Provincial Engineering Laboratory for Screening and Re-evaluation of Active Compounds of Herbal Medicines in Southern Anhui, Wuhu, 241000, China
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Barbarić Starčević K, Lukač N, Jelić M, Šućur A, Grčević D, Kovačić N. Reciprocal Alterations in Osteoprogenitor and Immune Cell Populations in Rheumatoid Synovia. Int J Mol Sci 2022; 23:ijms232012379. [PMID: 36293236 PMCID: PMC9604389 DOI: 10.3390/ijms232012379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 09/29/2022] [Accepted: 10/12/2022] [Indexed: 11/21/2022] Open
Abstract
Rheumatoid arthritis (RA) is chronic, autoimmune joint inflammation characterized by irreversible joint destruction. Besides increased resorption, destruction is a result of decreased bone formation, due to suppressed differentiation and function of the mesenchymal lineage-derived osteoblasts in inflammatory milieu. In this study, we analyzed the cellular composition of synovial tissue from 11 RA and 10 control patients harvested during planned surgeries in order to characterize resident synovial progenitor populations. Synovial cells were released by collagenase, and labeled for flow cytometry by two antibody panels: 1. CD3-FITC, CD14-PE, 7-AAD, CD11b-PECy7, CD235a-APC, CD19-APCeF780; and 2. 7-AAD, CD105-PECy7, CD45/CD31/CD235a-APC, and CD200-APCeF780. The proportions of lymphocytes (CD3+, CD19+) and myeloid (CD11b+, CD14+) cells were higher in synovial tissue from the patients with RA than in the controls. Among non-hematopoietic (CD45-CD31-CD235a-) cells, there was a decrease in the proportion of CD200+CD105- and increase in the proportion of CD200-CD105+ cells in synovial tissue from the patients with RA in comparison to the control patients. The proportions of both populations were associated with inflammatory activity and could discriminate between the RA and the controls.
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Affiliation(s)
| | - Nina Lukač
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb, School of Medicine, 10000 Zagreb, Croatia
- Department of Anatomy, University of Zagreb, School of Medicine, 10000 Zagreb, Croatia
| | - Mislav Jelić
- Department of Orthopaedic Surgery, University Hospital Centre Zagreb, 10000 Zagreb, Croatia
| | - Alan Šućur
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb, School of Medicine, 10000 Zagreb, Croatia
- Department of Physiology and Immunology, University of Zagreb, School of Medicine, 10000 Zagreb, Croatia
| | - Danka Grčević
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb, School of Medicine, 10000 Zagreb, Croatia
- Department of Physiology and Immunology, University of Zagreb, School of Medicine, 10000 Zagreb, Croatia
| | - Nataša Kovačić
- Laboratory for Molecular Immunology, Croatian Institute for Brain Research, University of Zagreb, School of Medicine, 10000 Zagreb, Croatia
- Department of Anatomy, University of Zagreb, School of Medicine, 10000 Zagreb, Croatia
- Correspondence: ; Tel.: +385-1-4566-846
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Lukač N, Katavić V, Šućur A, Filipović M, Grčević D, Kovačić N. RNA sequencing data from osteochondroprogenitor populations in synovial joints of mice during murine model of rheumatoid arthritis. Data Brief 2020; 33:106570. [PMID: 33304967 PMCID: PMC7711217 DOI: 10.1016/j.dib.2020.106570] [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: 06/04/2020] [Revised: 11/16/2020] [Accepted: 11/18/2020] [Indexed: 12/05/2022] Open
Abstract
The aim of this study was to analyze the transcriptome of TER119-CD31-CD45-CD51+CD200+CD105- population (further, CD200+), potential early osteocondroprogenitors, whose frequency is reduced in the joints of mice with antigen-induced arthritis (AIA) [1]. A population defined by similar surface markers has been previously identified as murine skeletal stem cells in bone [2]. In order to confirm their identity this population was compared to TER119-CD31-CD45-CD51+CD200-CD105+ (further, CD105+) cells, which possibly represent committed progenitors, or other non-progenitor population such as synovial fibroblasts. In order to asses changes in CD200+ population in inflammatory setting, it was also compared to the same population from healthy mice. AIA was induced by immunization of mice with methylated bovine serum albumin (mBSA) and subsequent intra-articular injection of mBSA, while non-immunized mice were injected with phosphate-buffered saline at all timepoints. Ten days after intra-articular injection, knee joints were harvested and synovial cells were released by collagenase digestion. Using fluorescence-activated cell sorting, 200-500 cells from selected populations were sorted directly into cell lysis buffer, RNA was reversely transcribed, and first strand cDNA product was amplified. cDNA amplicons were used for library preparation. Bioinformatics analysis was performed using cutadapt [3], HISAT2 [4], Samtools [5] and StringTie [6] tools, and egdeR [7], limma [8], and ClusterProfiler [9] Bioconductor packages. In addition to access to raw data at the NCBI Gene Expression Omnibus repository, this article also provides sample similarity analysis, tables of differentially expressed genes, graphic visualisations of differential expression and gene set enrichment analysis performed on publicly available GO terms. Interpretation of osteochondroprogenitor phenotype of CD200+ population based on analysis of presented data is provided in the article "What do we know about bone morphogenetic proteins and osteochondroprogenitors in inflammatory conditions?" [10]. Reuse of this data may help researchers elucidate alterations of synovial stromal and osteochondroprogenitor populations in inflammatory settings and define their role in structural damage in rheumatoid arthritis.
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Affiliation(s)
- Nina Lukač
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Anatomy, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Vedran Katavić
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Anatomy, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Alan Šućur
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Physiology and Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Maša Filipović
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Physiology and Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Danka Grčević
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Physiology and Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Nataša Kovačić
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Anatomy, University of Zagreb School of Medicine, Zagreb, Croatia
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Lukač N, Katavić V, Novak S, Šućur A, Filipović M, Kalajzić I, Grčević D, Kovačić N. What do we know about bone morphogenetic proteins and osteochondroprogenitors in inflammatory conditions? Bone 2020; 137:115403. [PMID: 32371019 DOI: 10.1016/j.bone.2020.115403] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 04/10/2020] [Accepted: 04/28/2020] [Indexed: 02/07/2023]
Abstract
Osteochondroprogenitors are crucial for embryonic bone development and postnatal processes such as bone repair in response to fracture injury, and their dysfunction may contribute to insufficient repair of structural damage in inflammatory arthritides. In the fracture healing, the early inflammatory phase is crucial for normal callus development and new bone formation. This process involves a complex interplay of many molecules and cell types, responsible for recruitment, expansion and differentiation of osteochondroprogenitor populations. In inflammatory arthritides, inflammation induces bone resorption and causes insufficient bone formation, which leads to local and systemic bone loss. While bone loss is a predominant feature in rheumatoid arthritis, inflammation also induces pathologic bone formation at enthesial sites in seronegative spondyloarthropathies. Bone morphogenetic proteins (BMP) are involved in cell proliferation, differentiation and apoptosis, and have fundamental roles in maintenance of postnatal bone homeostasis. They are crucial regulators of the osteochondroprogenitor pool and drive their proliferation, differentiation, and lifespan during bone regeneration. In this review, we summarize the effects of inflammation on osteochondroprogenitor populations during fracture repair and in inflammatory arthritides, with special focus on inflammation-mediated modulation of BMP signaling. We also present data in which we describe a population of murine synovial osteochondroprogenitor cells, which are reduced in arthritis, and characterize their expression of genes involved in regulation of bone homeostasis, emphasizing the up-regulation of BMP pathways in early progenitor subset. Based on the presented data, it may be concluded that during an inflammatory response, innate immune cells induce osteochondroprogenitors by providing signals for their recruitment, by producing BMPs and other osteogenic factors for paracrine effects, and by secreting inflammatory cytokines that may positively regulate osteogenic pathways. On the other hand, inflammatory cells may secrete cytokines that interfere with osteogenic pathways, proapoptotic factors that reduce the pool of osteochondroprogenitor cells, as well as BMP and Wnt antagonists. The net effect is strongly context-dependent and influenced by the local milieu of cells, cytokines, and growth factors. Further elucidation of the interplay between inflammatory signals and BMP-mediated bone formation may provide valuable tools for therapeutic targeting.
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Affiliation(s)
- Nina Lukač
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia; Department of Anatomy, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Vedran Katavić
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia; Department of Anatomy, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Sanja Novak
- Department of Reconstructive Sciences, University of Connecticut Health Center, Farmington, CT, USA
| | - Alan Šućur
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia; Department of Physiology and Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Maša Filipović
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia; Department of Physiology and Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Ivo Kalajzić
- Department of Reconstructive Sciences, University of Connecticut Health Center, Farmington, CT, USA
| | - Danka Grčević
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia; Department of Physiology and Immunology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Nataša Kovačić
- Laboratory for Molecular Immunology, University of Zagreb School of Medicine, Zagreb, Croatia; Department of Anatomy, University of Zagreb School of Medicine, Zagreb, Croatia.
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Li D, Wang Y, Tang L, Jin X, Xia C, Xu H, Hu J. CD200-CD200R1 signalling attenuates imiquimod-induced psoriatic inflammation by inhibiting the activation of skin inflammatory macrophages. Int Immunopharmacol 2019; 78:106046. [PMID: 31835080 DOI: 10.1016/j.intimp.2019.106046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/06/2019] [Accepted: 11/10/2019] [Indexed: 12/15/2022]
Abstract
Psoriasis is an autoimmune skin disease caused by interactions between keratinocytes and immune cells, such as macrophages. CD200 is expressed on the surface of various cell types, and its receptor, CD200R1, belongs to a family of immunosuppressive receptors that are mainly expressed on myeloid cells. CD200/CD200R1 signalling is associated with the prevention of autoimmune diseases; however, the role of CD200/CD200R1 signalling in the pathogenesis of psoriasis remains unknown. In this study, we detected in vivo effect of the CD200 protein on psoriasis and in vitro effects of CD200 on macrophages and keratinocytes co-cultured with macrophages were also evaluated. Our data showed that the expression of CD200 and CD200R1 was decreased and the expression of macrophage-related pro-inflammatory factors (IL-6, IL-1β, TNF-α) was increased in IMQ-induced psoriasis-like skin of mice. After subcutaneous injection of CD200, the symptoms were alleviated, local expression of CD200R1 was markedly induced, infiltrated CD68+ cells were significantly reduced and the expression levels of IL-6, IL-1β, and TNF-α were strongly downregulated. In in vitro experiments, CD200 suppressed the migration of macrophages, induced CD200R1 expression on the surface of macrophages, and decreased the levels of pro-inflammatory factors. Western blot (WB) data showed that the CD200-CD200R1 reaction controlled the activation of inflammatory macrophages by inhibiting the NF-κB signalling pathway. These results demonstrate that CD200-CD200R1 signalling can reduce IMQ-induced psoriasis-like skin inflammation by inhibiting the activation of macrophages.
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Affiliation(s)
- Dongping Li
- The Engineering Research Center of Synthetic Polypeptide Discovery and Evaluation of Jiangsu Province, Nanjing, PR China; Department of State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China
| | - Ying Wang
- The Engineering Research Center of Synthetic Polypeptide Discovery and Evaluation of Jiangsu Province, Nanjing, PR China; Department of State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China
| | - Lu Tang
- The Engineering Research Center of Synthetic Polypeptide Discovery and Evaluation of Jiangsu Province, Nanjing, PR China; Department of State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China
| | - Xinrong Jin
- The Engineering Research Center of Synthetic Polypeptide Discovery and Evaluation of Jiangsu Province, Nanjing, PR China; Department of State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China
| | - Chunlei Xia
- The Engineering Research Center of Synthetic Polypeptide Discovery and Evaluation of Jiangsu Province, Nanjing, PR China; Department of State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China
| | - Hanmei Xu
- The Engineering Research Center of Synthetic Polypeptide Discovery and Evaluation of Jiangsu Province, Nanjing, PR China; Department of State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China.
| | - Jialiang Hu
- The Engineering Research Center of Synthetic Polypeptide Discovery and Evaluation of Jiangsu Province, Nanjing, PR China; Department of State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China.
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