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Li X, Zhang C, Tao H, Yang X, Qian X, Zhou J, Zhang L, Shi Y, Gu C, Geng D, Hao Y. Dexmedetomidine alleviates osteoarthritis inflammation and pain through the CB 2 pathway in rats. Int Immunopharmacol 2023; 119:110134. [PMID: 37044038 DOI: 10.1016/j.intimp.2023.110134] [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: 01/15/2023] [Revised: 03/15/2023] [Accepted: 03/30/2023] [Indexed: 04/14/2023]
Abstract
As a common joint disease, osteoarthritis (OA) is often associated with chronic pain. Synovial inflammation is correlated with OA progression and pain. Synovial inflammation can produce a series of destructive substances, such as inflammatory factors and pain mediators, which aggravate cartilage injury and further accelerate the progression of OA. Although many studies investigated the effects of synovial inflammation on the onset and progression of OA, there are limited reports regarding slowing the progression of OA and relieving pain by modulating synovial inflammation. Therefore, there is an urgent need to search for safe and effective drugs to alleviate synovial inflammation. Dexmedetomidine, a selective α2 agonist, has been shown to have anti-inflammatory and analgesic effects. However, its role and mechanism in OA remain unclear. Here, the effects and mechanisms of dexmedetomidine in OA synovial inflammation were investigated both in vivo and in vitro. We observed that dexmedetomidine stunted LPS-induced migration and invasion of FLSs and the expression of inflammatory factors by upregulating cannabinoid receptor type 2 (CB2) expression. Surprisingly, the application of AM630 (CB2 antagonist) reversed this therapeutic effect. The results of the animal experiments showed that dexmedetomidine reduced synovial inflammation and increased the pain threshold in an OA rat model. These preliminary results imply that dexmedetomidine may be an effective compound for OA treatment.
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Affiliation(s)
- Xueyan Li
- Department of Anesthesiology, Suzhou Municipal Hospital (North District), Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu, China
| | - Chun Zhang
- Department of Anesthesiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 999, Xiwang Road, Shanghai, China
| | - Huaqiang Tao
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China
| | - Xing Yang
- Orthopedics and Sports Medicine Center, Suzhou Municipal Hospital, Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu 226000, China
| | - Xiaobo Qian
- Department of Anesthesiology, Suzhou Municipal Hospital (North District), Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu, China
| | - Jing Zhou
- Orthopedics and Sports Medicine Center, Suzhou Municipal Hospital, Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu 226000, China
| | - Liyuan Zhang
- Department of Anesthesiology, Suzhou Municipal Hospital (North District), Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu, China
| | - Yi Shi
- Department of Anesthesiology, Suzhou Municipal Hospital (North District), Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu, China
| | - Chengyong Gu
- Department of Anesthesiology, Suzhou Municipal Hospital (North District), Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu, China.
| | - Dechun Geng
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China.
| | - Yuefeng Hao
- Orthopedics and Sports Medicine Center, Suzhou Municipal Hospital, Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu 226000, China.
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Wu W, Wang J, Chen J, Lu J, Lao Y, Huang K, Lin J. MFG-E8 has guiding significance for the prognosis and treatment of sepsis. Sci Rep 2022; 12:20916. [PMID: 36463380 PMCID: PMC9719492 DOI: 10.1038/s41598-022-25601-8] [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: 04/26/2022] [Accepted: 12/01/2022] [Indexed: 12/05/2022] Open
Abstract
Sepsis remains a significant clinical challenge. Ferroptosis is involved in the pathogenesis of sepsis. Ferroptosis is associated with oxidative stress, and excessive oxidative stress is suppressed by milk fat globule epidermal growth factor 8 (MFG-E8) under various conditions. However, the role of MFG-E8 in sepsis-induced ferroptosis and oxidative stress is still unclear. First, we collected blood samples from patients with sepsis and detected the expression of serum MFG-E8. Then, the relationship between serum concentrations of MFG-E8 and disease severity was detected. Finally, the effects of MFG-E8 treatment on ferroptosis and oxidative stress in the livers of septic mice were determined. The expression of serum MFG-E8 in healthy subjects was notably higher than that in septic patients. In addition, when nonsurvivors and survivors of sepsis were compared, MFG-E8 levels were considerably lower in the former. The ROC curve for MFG-E8 was also generated. The area under the curve for MFG-E8 was 0.768 (95% confidence interval [CI] 0.627-0.909, p = 0.003). The patients were separated into two groups based on the MFG-E8 cut-off value of 3.86 ng/mL. According to the Kaplan‒Meier survival analysis, patients with low MFG-E8 levels had a significantly decreased 28-day survival rate compared with patients with high MFG-E8 levels. High MFG-E8 levels were substantially related to a decreased risk of death, as demonstrated by the Cox proportional hazard model that we utilized. In addition, compared with sham mice, septic mice exhibited liver and kidney damage, and MFG-E8 may have protective effects. The survival study indicated that MFG-E8 could effectively improve the survival rate of septic mice. Treatment with MFG-E8 suppresses oxidative stress and ferroptosis in the livers of septic mice. Serum MFG-E8 levels are lower in septic patients and are negatively related to disease severity. Treatment with MFG-E8 suppresses oxidative stress and ferroptosis in the livers of septic mice, contributing to significantly improved survival in septic mice. These findings showed that MFG-E8 could be a new sepsis predictive biomarker. MFG-E8 may have therapeutic potential in the treatment of sepsis.
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Affiliation(s)
- Wei Wu
- grid.412632.00000 0004 1758 2270Department of Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, Hubei People’s Republic of China
| | - Jing Wang
- grid.412632.00000 0004 1758 2270Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei People’s Republic of China
| | - Jingdi Chen
- Department of Orthopedics, The Airborne Military Hospital, Wuhan, Hubei People’s Republic of China
| | - Jiaming Lu
- grid.412632.00000 0004 1758 2270Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei People’s Republic of China
| | - Yaojia Lao
- grid.413247.70000 0004 1808 0969Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei People’s Republic of China
| | - Kai Huang
- grid.413247.70000 0004 1808 0969Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei People’s Republic of China
| | - Jun Lin
- grid.412632.00000 0004 1758 2270Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei People’s Republic of China ,grid.413247.70000 0004 1808 0969Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei People’s Republic of China
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Lu Y, Liu L, Pan J, Luo B, Zeng H, Shao Y, Zhang H, Guan H, Guo D, Zeng C, Zhang R, Bai X, Zhang H, Cai D. MFG-E8 regulated by miR-99b-5p protects against osteoarthritis by targeting chondrocyte senescence and macrophage reprogramming via the NF-κB pathway. Cell Death Dis 2021; 12:533. [PMID: 34031369 PMCID: PMC8144578 DOI: 10.1038/s41419-021-03800-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 05/03/2021] [Accepted: 05/04/2021] [Indexed: 12/27/2022]
Abstract
Milk fat globule-epidermal growth factor (EGF) factor 8 (MFG-E8), as a necessary bridging molecule between apoptotic cells and phagocytic cells, has been widely studied in various organs and diseases, while the effect of MFG-E8 in osteoarthritis (OA) remains unclear. Here, we identified MFG-E8 as a key factor mediating chondrocyte senescence and macrophage polarization and revealed its role in the pathology of OA. We found that MFG-E8 expression was downregulated both locally and systemically as OA advanced in patients with OA and in mice after destabilization of the medial meniscus surgery (DMM) to induce OA. MFG-E8 loss caused striking progressive articular cartilage damage, synovial hyperplasia, and massive osteophyte formation in OA mice, which was relieved by intra-articular administration of recombinant mouse MFG-E8 (rmMFG-E8). Moreover, MFG-E8 restored chondrocyte homeostasis, deferred chondrocyte senescence and reprogrammed macrophages to the M2 subtype to alleviate OA. Further studies showed that MFG-E8 was inhibited by miR-99b-5p, expression of which was significantly upregulated in OA cartilage, leading to exacerbation of experimental OA partially through activation of NF-κB signaling in chondrocytes. Our findings established an essential role of MFG-E8 in chondrocyte senescence and macrophage reprogramming during OA, and identified intra-articular injection of MFG-E8 as a potential therapeutic target for OA prevention and treatment.
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Affiliation(s)
- Yuheng Lu
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Liangliang Liu
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Jianying Pan
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Bingsheng Luo
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Hua Zeng
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Yan Shao
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Hongbo Zhang
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Hong Guan
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Dong Guo
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Chun Zeng
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Rongkai Zhang
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Xiaochun Bai
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China
| | - Haiyan Zhang
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China. .,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China. .,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China. .,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China.
| | - Daozhang Cai
- Department of Joint Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China. .,Department of Orthopedics, Orthopedic Hospital of Guangdong Province, Academy of Orthopedics of Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China. .,The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China. .,Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, China.
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