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Wang H, Lin S, Feng L, Huang B, Lu X, Yang Z, Jiang Z, Li Y, Zhang X, Wang M, Wang B, Kong L, Pan Q, Bai S, Li Y, Yang Y, Lee WYW, Currie PD, Lin C, Jiang Y, Chen J, Tortorella MD, Li H, Li G. Low-Dose Staphylococcal Enterotoxin C2 Mutant Maintains Bone Homeostasis via Regulating Crosstalk between Bone Formation and Host T-Cell Effector Immunity. Adv Sci (Weinh) 2023; 10:e2300989. [PMID: 37552005 PMCID: PMC10558680 DOI: 10.1002/advs.202300989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 06/22/2023] [Indexed: 08/09/2023]
Abstract
Studies in recent years have highlighted an elaborate crosstalk between T cells and bone cells, suggesting that T cells may be alternative therapeutic targets for the maintenance of bone homeostasis. Here, it is reported that systemic administration of low-dose staphylococcal enterotoxin C2 (SEC2) 2M-118, a form of mutant superantigen, dramatically alleviates ovariectomy (OVX)-induced bone loss via modulating T cells. Specially, SEC2 2M-118 treatment increases trabecular bone mass significantly via promoting bone formation in OVX mice. These beneficial effects are largely diminished in T-cell-deficient nude mice and can be rescued by T-cell reconstruction. Neutralizing assays determine interferon gamma (IFN-γ) as the key factor that mediates the beneficial effects of SEC2 2M-118 on bone. Mechanistic studies demonstrate that IFN-γ stimulates Janus kinase/signal transducer and activator of transcription (JAK-STAT) signaling, leading to enhanced production of nitric oxide, which further activates p38 mitogen-activated protein kinase (MAPK) and Runt-related transcription factor 2 (Runx2) signaling and promotes osteogenic differentiation. IFN-γ also directly inhibits osteoclast differentiation, but this effect is counteracted by proabsorptive factors tumor necrosis factor alpha (TNF-α) and interleukin 1 beta (IL-1β) secreted from IFN-γ-stimulated macrophages. Taken together, this work provides clues for developing innovative approaches which target T cells for the prevention and treatment of osteoporosis.
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Affiliation(s)
- Haixing Wang
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
- Centre for Regenerative Medicine and HealthHong Kong Institute of Science & InnovationChinese Academy of SciencesHong Kong999077China
| | - Sien Lin
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Lu Feng
- Centre for Regenerative Medicine and HealthHong Kong Institute of Science & InnovationChinese Academy of SciencesHong Kong999077China
| | - Baozhen Huang
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Xuan Lu
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Zhengmeng Yang
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Zhaowei Jiang
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Yu‐Cong Li
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Xiaoting Zhang
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Ming Wang
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Bin Wang
- Greater Bay Area Institute of Precision Medicine (Guangzhou)Fudan University2nd Nanjiang Rd, Nansha DistrictGuangzhou511458China
| | - Lingchi Kong
- Department of Orthopaedic SurgeryShanghai Jiao Tong University Affiliated Sixth People's HospitalYishan Rd. 600Shanghai200233China
| | - Qi Pan
- Department of OrthopaedicsSouth China HospitalShenzhen UniversityShenzhen518116China
| | - Shanshan Bai
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Yuan Li
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Yongkang Yang
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Wayne Yuk Wai Lee
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
| | - Peter D. Currie
- Australian Regenerative Medicine InstituteMonash UniversityWellington RoadClaytonVictoria3800Australia
| | - Changshuang Lin
- Shenyang Xiehe Biopharmaceutical Co. Ltd.ShenyangLiaoning Province110179China
| | - Yanfu Jiang
- Shenyang Xiehe Biopharmaceutical Co. Ltd.ShenyangLiaoning Province110179China
| | - Juyu Chen
- Shenyang Xiehe Biopharmaceutical Co. Ltd.ShenyangLiaoning Province110179China
| | - Micky D. Tortorella
- Centre for Regenerative Medicine and HealthHong Kong Institute of Science & InnovationChinese Academy of SciencesHong Kong999077China
| | - Hongyi Li
- Shenyang Xiehe Biopharmaceutical Co. Ltd.ShenyangLiaoning Province110179China
| | - Gang Li
- Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong999077China
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