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Chen S, Zhao W, Du J, Chen S, Li J, Shen B, Zhou Y, Chen S. The expression of RBPJ and its potential role in rheumatoid arthritis. BMC Genomics 2024; 25:899. [PMID: 39350019 PMCID: PMC11441141 DOI: 10.1186/s12864-024-10804-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Accepted: 09/16/2024] [Indexed: 10/04/2024] Open
Abstract
BACKGROUND Recombination signal-binding protein for immunoglobulin kappa J region (RBPJ) is a transcriptional regulator that plays an important role in maintaining immune homeostasis. This study aimed to estimate the expression of RBPJ in rheumatoid arthritis (RA) patients and investigate its relationship with RA. METHODS A total of 83 newly diagnosed RA patients and 70 healthy controls were included. mRNA was extracted from peripheral blood mononuclear cells (PBMCs), and the expression of RBPJ was detected using quantitative real-time PCR (qRT‒PCR). An RA dataset (GSE89408) was obtained from the Gene Expression Omnibus (GEO) database, and RA synovial tissues were divided into two groups. The differentially expressed genes (DEGs) were selected with the "DESeq2" R package. RESULTS RBPJ expression was lower in RA patients than in health controls and was negatively correlated with the DAS28 score, C-reactive protein (CRP) level and erythrocyte sedimentation rate (ESR). RA synovial tissues from GSE89408 were classified into RBPJ-low (≤ 25%) and RBPJ-high (≥ 75%) groups according to RBPJ expression, and 562 DEGs were identified. Gene Ontology (GO) enrichment analyses revealed that the DEGs significantly affected the regulation of T cell activation and lymphocyte/mononuclear cell differentiation. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis revealed that the most enriched pathways of DEGs were the T cell receptor signaling pathway, Th1/2 and Th17 cell differentiation, the PI3K - Akt signaling pathway and cytokine‒cytokine receptor interaction. CytoHubba Plugin revealed that most of the top 10 genes were involved in osteoclast differentiation, the T cell receptor signaling pathway and cytokine‒cytokine receptor interaction. CONCLUSIONS RBPJ expression was significantly lower in RA patients and negatively correlated with disease activity. GEO dataset analysis demonstrated that RBPJ may be involved in osteoclast differentiation, T cell activation and differentiation, and the T cell receptor signaling pathway. Our research may contribute to understanding the potential mechanisms by which RBPJ regulates T cell differentiation and cytokine‒cytokine receptor interaction in RA patients.
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Affiliation(s)
- Shuaishuai Chen
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, 150 Ximen Street of Linhai City, Linhai, 317000, China
- Key Laboratory of System Medicine and Precision Diagnosis and Treatment of Taizhou, Luqiao, China
| | - Weibo Zhao
- Department of Orthopedics, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Linhai, China
| | - Juping Du
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, 150 Ximen Street of Linhai City, Linhai, 317000, China
- Key Laboratory of System Medicine and Precision Diagnosis and Treatment of Taizhou, Luqiao, China
| | - Suyun Chen
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, 150 Ximen Street of Linhai City, Linhai, 317000, China
- Key Laboratory of System Medicine and Precision Diagnosis and Treatment of Taizhou, Luqiao, China
| | - Jun Li
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, 150 Ximen Street of Linhai City, Linhai, 317000, China
- Key Laboratory of System Medicine and Precision Diagnosis and Treatment of Taizhou, Luqiao, China
| | - Bo Shen
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, 150 Ximen Street of Linhai City, Linhai, 317000, China
- Key Laboratory of System Medicine and Precision Diagnosis and Treatment of Taizhou, Luqiao, China
| | - Yuanlin Zhou
- Department of Neurology, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, 150 Ximen Street of Linhai City, Linhai, 317000, China.
| | - Shiyong Chen
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, 150 Ximen Street of Linhai City, Linhai, 317000, China.
- Key Laboratory of System Medicine and Precision Diagnosis and Treatment of Taizhou, Luqiao, China.
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Ospelt C. Annals of the Rheumatic Diseases collection on epigenetics: from three dimensional chromatin organisation to microRNA. Ann Rheum Dis 2024; 83:821-825. [PMID: 38123909 DOI: 10.1136/ard-2023-224857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 11/23/2023] [Indexed: 12/23/2023]
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Puchner A, Simader E, Saferding V, Hofmann M, Kieler M, Brunner J, Pfeifle R, Niederreiter B, Krönke G, Schabbauer G, Georgel P, Diehl G, Steiner G, Hayer S, Redlich K, Smolen JS, Aletaha D, Blüml S. Bona fide dendritic cells are pivotal precursors for osteoclasts. Ann Rheum Dis 2024; 83:518-528. [PMID: 38071515 DOI: 10.1136/ard-2022-223817] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 11/28/2023] [Indexed: 03/14/2024]
Abstract
OBJECTIVES Osteoclasts (OCs) are myeloid-derived multinucleated cells uniquely able to degrade bone. However, the exact nature of their myeloid precursors is not yet defined. METHODS CD11c-diphtheria toxin receptor (CD11cDTR) transgenic mice were treated with diphtheria toxin (DT) or phosphate buffered saline (PBS) during serum transfer arthritis (STA) and human tumour necrosis factor transgenic (hTNFtg) arthritis and scored clinically and histologically. We measured cytokines in synovitis by quantitative polymerase chain reaction (qPCR). We performed ovariectomy in CD11cDTR mice treated with PBS or DT. We analysed CD11cDTR, CD11c-Cre/CX3CR1-STOP-DTR and Zbtb46-DTR-treated mice with DT using histomorphometry and OC of CD11c and Zbtb46 fate reporter mice by fluorescent imaging. We sorted murine and human OC precursors and stimulated them with macrophage colony-stimulating factor (M-CSF) and receptor activator of nuclear factor kappa-B ligand (RANKL) to generate OCs. RESULTS Targeting CD11c+ cells in vivo in models of inflammatory arthritis (STA and hTNFtg) ameliorates arthritis by reducing inflammatory bone destruction and OC generation. Targeting CD11c-expressing cells in unchallenged mice removes all OCs in their long bones. OCs do not seem to be derived from CD11c+ cells expressing CX3CR1+, but from Zbtb46+conventional dendritic cells (cDCs) as all OCs in Zbtb46-Tomato fate reporter mice are Tomato+. In line, administration of DT in Zbtb46-DTR mice depletes all OCs in long bones. Finally, human CD1c-expressing cDCs readily differentiated into bone resorbing OCs. CONCLUSION Taken together, we identify DCs as important OC precursors in bone homeostasis and inflammation, which might open new avenues for therapeutic interventions in OC-mediated diseases.
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Affiliation(s)
- Antonia Puchner
- Division of Rheumatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Elisabeth Simader
- Division of Rheumatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Victoria Saferding
- Division of Rheumatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
- Ludwig Boltzmann Institute for Arthritis and Rehabilitation, Vienna, Austria
| | - Melanie Hofmann
- Institute for Vascular Biology, Centre for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Markus Kieler
- Institute for Vascular Biology, Centre for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Julia Brunner
- Institute for Vascular Biology, Centre for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - René Pfeifle
- Department of Internal Medicine 3, Friedrich Alexander University Erlangen-Nuremberg and Universitatsklinikum Erlangen, Erlangen, Germany
| | - Birgit Niederreiter
- Division of Rheumatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Gerhard Krönke
- Department of Internal Medicine 3, Friedrich Alexander University Erlangen-Nuremberg and Universitatsklinikum Erlangen, Erlangen, Germany
| | - Gernot Schabbauer
- Institute for Vascular Biology, Centre for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Philippe Georgel
- Université de Strasbourg, Faculté de Médecine, INSERM UMR_S 1109, Strasbourg, France
| | - Gretchen Diehl
- Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Guenter Steiner
- Division of Rheumatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
- Ludwig Boltzmann Institute for Arthritis and Rehabilitation, Vienna, Austria
| | - Silvia Hayer
- Division of Rheumatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Kurt Redlich
- Division of Rheumatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Josef S Smolen
- Division of Rheumatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Daniel Aletaha
- Division of Rheumatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Stephan Blüml
- Division of Rheumatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
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Zhou J, Jia F, Qu M, Ning P, Huang X, Tan L, Liu D, Zhong P, Wu Q. The prevention effect of pulsed electromagnetic fields treatment on senile osteoporosis in vivo via improving the inflammatory bone microenvironment. Electromagn Biol Med 2024:1-15. [PMID: 38329038 DOI: 10.1080/15368378.2024.2314093] [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: 09/13/2022] [Accepted: 10/26/2023] [Indexed: 02/09/2024]
Abstract
This study aimed to assess PEMF in a rat model of senile osteoporosis and its relationship with NLRP3-mediated low-grade inflammation in the bone marrow microenvironment. A total of 24 Sprague Dawley (SD) rats were included in this study. Sixteen of them were 24-month natural-aged male SD rats, which were randomly distributed into the Aged group and the PEMF group (n = 8 per group). The remaining 8 3-month -old rats were used as the Young positive control group (n = 8). Rats in the PEMF group received 12 weeks of PEMF with 40 min/day, five days per week, while the other rats received placebo PEMF intervention. Bone mineral density/microarchitecture, serum levels of CTX-1 and P1CP, and NLRP3-related signaling genes and proteins in rat bone marrow were then analyzed. The 12-week of PEMF showed significant mitigation of aging-induced bone loss and bone microarchitecture deterioration, i.e. PEMF increased the bone mineral density of the proximal femur and L5 vertebral body and improved parameters of the proximal tibia and L4 vertebral body. Further analysis showed that PEMF reversed aging-induced bone turnover, specifically, decreased serum CTX-1 and elevated serum P1CP. Furthermore, PEMF also dramatically inhibited NLRP3-mediated low-grade inflammation in the bone marrow, i.e. PEMF inhibited the levels of NLRP3, proCaspase1, cleaved Caspase1, IL-1β, and GSDMD-N. The study demonstrated that PEMF could mitigate the aging-induced bone loss and reverses the deterioration of bone microarchitecture probably through inhibiting NLRP3-mediated low-grade chronic inflammation to improve the inflammatory bone microenvironment in aged rats.
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Affiliation(s)
- Jun Zhou
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Feiyang Jia
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Mengjian Qu
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Pengyun Ning
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Xiarong Huang
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Lu Tan
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Danni Liu
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Peirui Zhong
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Qi Wu
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- School of Rehabilitation Medicine, Nanjing Medical University, Nanjing, Jiangsu, China
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Blümke A, Ijeoma E, Simon J, Wellington R, Purwaningrum M, Doulatov S, Leber E, Scatena M, Giachelli CM. Comparison of osteoclast differentiation protocols from human induced pluripotent stem cells of different tissue origins. Stem Cell Res Ther 2023; 14:319. [PMID: 37936199 PMCID: PMC10631132 DOI: 10.1186/s13287-023-03547-6] [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: 06/20/2023] [Accepted: 10/25/2023] [Indexed: 11/09/2023] Open
Abstract
BACKGROUND Ever since their discovery, induced pluripotent stem cells (iPSCs) have been extensively differentiated into a large variety of cell types. However, a limited amount of work has been dedicated to differentiating iPSCs into osteoclasts. While several differentiation protocols have been published, it remains unclear which protocols or differentiation methods are preferable regarding the differentiation of osteoclasts. METHODS In this study, we compared the osteoclastogenesis capacity of a peripheral blood mononuclear cell (PBMC)-derived iPSC line to a fibroblast-derived iPSC line in conjunction with either embryoid body-based or monolayer-based differentiation strategies. Both cell lines and differentiation protocols were investigated regarding their ability to generate osteoclasts and their inherent robustness and ease of use. The ability of both cell lines to remain undifferentiated while propagating using a feeder-free system was assessed using alkaline phosphatase staining. This was followed by evaluating mesodermal differentiation and the characterization of hematopoietic progenitor cells using flow cytometry. Finally, osteoclast yield and functionality based on resorptive activity, Cathepsin K and tartrate-resistant acid phosphatase (TRAP) expression were assessed. The results were validated using qRT-PCR throughout the differentiation stages. RESULTS Embryoid body-based differentiation yielded CD45+, CD14+, CD11b+ subpopulations which in turn differentiated into osteoclasts which demonstrated TRAP positivity, Cathepsin K expression and mineral resorptive capabilities. This was regardless of which iPSC line was used. Monolayer-based differentiation yielded lower quantities of hematopoietic cells that were mostly CD34+ and did not subsequently differentiate into osteoclasts. CONCLUSIONS The outcome of this study demonstrates the successful differentiation of osteoclasts from iPSCs in conjunction with the embryoid-based differentiation method, while the monolayer-based method did not yield osteoclasts. No differences were observed regarding osteoclast differentiation between the PBMC and fibroblast-derived iPSC lines.
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Affiliation(s)
- Alexander Blümke
- Department of Bioengineering, Department of Medicine, University of Washington, Foege Hall University of Washington, 3720 15th, Ave NE, Box 355061, Seattle, WA, 98195, USA
- Department of Orthopedics and Trauma Surgery, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Erica Ijeoma
- Department of Bioengineering, Department of Medicine, University of Washington, Foege Hall University of Washington, 3720 15th, Ave NE, Box 355061, Seattle, WA, 98195, USA
| | - Jessica Simon
- Department of Bioengineering, Department of Medicine, University of Washington, Foege Hall University of Washington, 3720 15th, Ave NE, Box 355061, Seattle, WA, 98195, USA
| | - Rachel Wellington
- Division of Hematology, Department of Medicine, University of Washington, Seattle, WA, USA
- Molecular and Cellular Biology Program, School of Medicine, University of Washington, Seattle, WA, USA
- Translational Science and Therapeutics Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Medania Purwaningrum
- Department of Bioengineering, Department of Medicine, University of Washington, Foege Hall University of Washington, 3720 15th, Ave NE, Box 355061, Seattle, WA, 98195, USA
- Department of Biochemistry, Faculty of Veterinary Medicine, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Sergei Doulatov
- Division of Hematology, Department of Medicine, University of Washington, Seattle, WA, USA
| | - Elizabeth Leber
- Department of Bioengineering, Department of Medicine, University of Washington, Foege Hall University of Washington, 3720 15th, Ave NE, Box 355061, Seattle, WA, 98195, USA
| | - Marta Scatena
- Department of Bioengineering, Department of Medicine, University of Washington, Foege Hall University of Washington, 3720 15th, Ave NE, Box 355061, Seattle, WA, 98195, USA
| | - Cecilia M Giachelli
- Department of Bioengineering, Department of Medicine, University of Washington, Foege Hall University of Washington, 3720 15th, Ave NE, Box 355061, Seattle, WA, 98195, USA.
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Skubica P, Husakova M, Dankova P. In vitro osteoclastogenesis in autoimmune diseases - Strengths and pitfalls of a tool for studying pathological bone resorption and other disease characteristics. Heliyon 2023; 9:e21925. [PMID: 38034780 PMCID: PMC10682642 DOI: 10.1016/j.heliyon.2023.e21925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 10/31/2023] [Accepted: 10/31/2023] [Indexed: 12/02/2023] Open
Abstract
Osteoclasts play a critical role in bone pathology frequently associated with autoimmune diseases. Studying the etiopathogenesis of these diseases and their clinical manifestations can involve in vitro osteoclastogenesis, an experimental technique that utilizes osteoclast precursors that are relatively easily accessible from peripheral blood or synovial fluid. However, the increasing number of methodical options to study osteoclastogenesis in vitro poses challenges in translating findings to clinical research and practice. This review compares and critically evaluates previous research work based on in vitro differentiation of human osteoclast precursors originating from patients, which aimed to explain autoimmune pathology in rheumatic and enteropathic diseases. The discussion focuses primarily on methodical differences between the studies, including the origin of osteoclast precursors, culture conditions, and methods for identifying osteoclasts and assessing their activity. Additionally, the review examines the clinical significance of the three most commonly used in vitro approaches: induced osteoclastogenesis, spontaneous osteoclastogenesis, and cell co-culture. By analyzing and integrating the gathered information, this review proposes general connections between different studies, even in cases where their results are seemingly contradictory. The derived conclusions and future directions aim to enhance our understanding of a potential and limitations of in vitro osteoclastogenesis and provide a foundation for discussing novel methods (such as osteoclastogenesis dynamic) and standardized approaches (such as spontaneous osteoclastogenesis) for future use in autoimmune disease research.
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Affiliation(s)
- Patrik Skubica
- Faculty of Science, Charles University, Prague, Czech Republic
| | - Marketa Husakova
- First Faculty of Medicine, Charles University, Prague and Institute of Rheumatology, Prague, Czech Republic
| | - Pavlina Dankova
- Faculty of Science, Charles University, Prague, Czech Republic
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Blümke A, Ijeoma E, Simon J, Wellington R, Purwaningrum M, Doulatov S, Leber E, Scatena M, Giachelli CM. Comparison of osteoclast differentiation protocols from human induced pluripotent stem cells of different tissue origins. RESEARCH SQUARE 2023:rs.3.rs-3089289. [PMID: 37461708 PMCID: PMC10350192 DOI: 10.21203/rs.3.rs-3089289/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Background Ever since their discovery, induced pluripotent stem cells (iPSCs) have been extensively differentiated into a large variety of cell types. However, a limited amount of work has been dedicated to differentiating iPSCs into osteoclasts. While several differentiation protocols have been published, it remains unclear which protocols or differentiation methods are preferrable regarding the differentiation of osteoclasts. Methods In this study we compare the osteoclastogenesis capacity of a peripheral blood mononuclear cell (PBMC)-derived iPSC line to a fibroblast-derived iPSC line in conjunction with either embryoid body-based or monolayer-based differentiation strategies. Both cell lines and differentiation protocols were investigated regarding their ability to generate osteoclasts and their inherent robustness and ease of use. The ability of both cell lines to remain undifferentiated while propagating using a feeder-free system was assessed using alkaline phosphatase staining. This was followed by evaluating mesodermal differentiation and the characterization of hematopoietic progenitor cells using flow cytometry. Finally, osteoclast yield and functionality based on resorptive activity, Cathepsin K and tartrate-resistant acid phosphatase (TRAP) expression were assessed. Results were validated using qRT-PCR throughout the differentiation stages. Results Embryoid-body based differentiation yielded CD45+, CD14+, CD11b+ subpopulations which in turn differentiated into osteoclasts which demonstrated TRAP positivity, Cathepsin K expression and mineral resorptive capabilities. This was regardless of which iPSC line was used. Monolayer-based differentiation yielded lower quantities of hematopoietic cells that were mostly CD34+ and did not subsequently differentiate into osteoclasts. Conclusions The outcome of this study demonstrates the successful differentiation of osteoclasts from iPSCs in conjunction with the embryoid-based differentiation method, while the monolayer-based method did not yield osteoclasts. No differences were observed regarding osteoclast differentiation between the PBMC and fibroblast-derived iPSC lines.
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Affiliation(s)
| | - Erica Ijeoma
- University of Washington Department of Bioengineering
| | - Jessica Simon
- University of Washington Department of Bioengineering
| | | | | | | | | | - Marta Scatena
- University of Washington Department of Bioengineering
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Hascoët E, Blanchard F, Blin-Wakkach C, Guicheux J, Lesclous P, Cloitre A. New insights into inflammatory osteoclast precursors as therapeutic targets for rheumatoid arthritis and periodontitis. Bone Res 2023; 11:26. [PMID: 37217496 DOI: 10.1038/s41413-023-00257-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 03/02/2023] [Accepted: 03/09/2023] [Indexed: 05/24/2023] Open
Abstract
Rheumatoid arthritis (RA) and periodontitis are chronic inflammatory diseases leading to increased bone resorption. Preventing this inflammatory bone resorption is a major health challenge. Both diseases share immunopathogenic similarities and a common inflammatory environment. The autoimmune response or periodontal infection stimulates certain immune actors, leading in both cases to chronic inflammation that perpetuates bone resorption. Moreover, RA and periodontitis have a strong epidemiological association that could be explained by periodontal microbial dysbiosis. This dysbiosis is believed to be involved in the initiation of RA via three mechanisms. (i) The dissemination of periodontal pathogens triggers systemic inflammation. (ii) Periodontal pathogens can induce the generation of citrullinated neoepitopes, leading to the generation of anti-citrullinated peptide autoantibodies. (iii) Intracellular danger-associated molecular patterns accelerate local and systemic inflammation. Therefore, periodontal dysbiosis could promote or sustain bone resorption in distant inflamed joints. Interestingly, in inflammatory conditions, the existence of osteoclasts distinct from "classical osteoclasts" has recently been reported. They have proinflammatory origins and functions. Several populations of osteoclast precursors have been described in RA, such as classical monocytes, a dendritic cell subtype, and arthritis-associated osteoclastogenic macrophages. The aim of this review is to synthesize knowledge on osteoclasts and their precursors in inflammatory conditions, especially in RA and periodontitis. Special attention will be given to recent data related to RA that could be of potential value in periodontitis due to the immunopathogenic similarities between the two diseases. Improving our understanding of these pathogenic mechanisms should lead to the identification of new therapeutic targets involved in the pathological inflammatory bone resorption associated with these diseases.
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Affiliation(s)
- Emilie Hascoët
- Nantes Université, Oniris, Univ Angers, CHU Nantes, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000, Nantes, France
| | - Frédéric Blanchard
- Nantes Université, Oniris, Univ Angers, CHU Nantes, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000, Nantes, France
| | | | - Jérôme Guicheux
- Nantes Université, Oniris, Univ Angers, CHU Nantes, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000, Nantes, France.
| | - Philippe Lesclous
- Nantes Université, Oniris, Univ Angers, CHU Nantes, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000, Nantes, France
| | - Alexandra Cloitre
- Nantes Université, Oniris, Univ Angers, CHU Nantes, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000, Nantes, France
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Badii M, Gaal O, Popp RA, Crisan TO, Joosten LAB. Trained immunity and inflammation in rheumatic diseases. Joint Bone Spine 2022; 89:105364. [DOI: 10.1016/j.jbspin.2022.105364] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/01/2022] [Accepted: 02/09/2022] [Indexed: 11/27/2022]
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