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Duan M, Zhang X, Lou Y, Feng J, Guo P, Ye S, Lv P, Chen Y. Deletion of Tmem268 in mice suppresses anti-infectious immune responses by downregulating CD11b signaling. EMBO Rep 2024:10.1038/s44319-024-00141-6. [PMID: 38730209 DOI: 10.1038/s44319-024-00141-6] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 02/25/2024] [Accepted: 04/03/2024] [Indexed: 05/12/2024] Open
Abstract
Transmembrane protein 268 (TMEM268) is a novel, tumor growth-related protein first reported by our laboratory. It interacts with the integrin subunit β4 (ITGB4) and plays a positive role in the regulation of the ITGB4/PLEC signaling pathway. Here, we investigated the effects and mechanism of TMEM268 in anti-infectious immune response in mice. Tmem268 knockout in mice aggravated cecal ligation and puncture-induced sepsis, as evidenced by higher bacterial burden in various tissues and organs, congestion, and apoptosis. Moreover, Tmem268 deficiency in mice inhibited phagocyte adhesion and migration, thus decreasing phagocyte infiltration at the site of infection and complement-dependent phagocytosis. Further findings indicated that TMEM268 interacts with CD11b and inhibits its degradation via the endosome-lysosome pathway. Our results reveal a positive regulatory role of TMEM268 in β2 integrin-associated anti-infectious immune responses and signify the potential value of targeting the TMEM268-CD11b signaling axis for the maintenance of immune homeostasis and immunotherapy for sepsis and related immune disorders.
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Affiliation(s)
- Mengyuan Duan
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, 100191, Beijing, China
| | - Xuan Zhang
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, 100191, Beijing, China
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Beijing Pediatric Research Institute, Capital Medical University, National Center for Children's Health, 100045, Beijing, China
| | - Yaxin Lou
- Medical and Healthy Analytical Center, Peking University, 38 Xueyuan Road, 100191, Beijing, China
| | - Jinqiu Feng
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, 100191, Beijing, China
| | - Pengli Guo
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, 100191, Beijing, China
| | - Shufang Ye
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, 100191, Beijing, China
| | - Ping Lv
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, 100191, Beijing, China
| | - Yingyu Chen
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, 100191, Beijing, China.
- Center for Human Disease Genomics, Peking University, 38 Xueyuan Road, 100191, Beijing, China.
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Lu S, Zhu W, Wang Y, Kong C, Wang W, Chen X, Li X. Sagittal imbalance syndrome, a new concept, helps determining a long fusion for patients with degenerative lumbar spinal stenosis and severe global sagittal imbalance. J Orthop Surg Res 2024; 19:138. [PMID: 38351135 PMCID: PMC10865626 DOI: 10.1186/s13018-024-04613-2] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 02/01/2024] [Indexed: 02/16/2024] Open
Abstract
OBJECTIVE To retrospectively investigate the postoperative clinical and radiographic outcomes in elderly patients with degenerative lumbar spinal stenosis (DLSS) and severe global sagittal imbalance who underwent different fusion levels. METHODS A total of 214 patients with DLSS and severe global sagittal imbalance were included. Sagittal imbalance syndrome was defined as the severe decompensated radiographic global sagittal imbalance accompanied with the following symptoms: severe back pain in naturel posture that disappears or significantly relieves in support position, living disability with ODI score > 40% and dynamic sagittal imbalance. Thereinto, 54 patients were found with sagittal imbalance syndrome and were performed the lumbar decompression with a long thoracolumbar fusion (Group A) or a short lumbar fusion (Group B). Thirty patients without sagittal imbalance syndrome who underwent short lumbar decompression and fusion were selected as the control (Group C). RESULTS Patients with sagittal imbalance syndrome were detected to have more paraspinal muscle degeneration and less compensatory potentials for sagittal imbalance (smaller thoracic kyphosis and larger pelvic tilt) than those without this diagnosis. Postoperative comparisons revealed significant restoration of global sagittal alignment and balance and improvement of living quality in Groups A and C at the final follow-up. Six patients in Group B and one in Group A were found to have proximal junctional complication during follow-up. CONCLUSION Our results indicated that DLSS patients with sagittal imbalance syndrome had inferior surgical outcomes in terms of living quality and proximal junctional complication after lumbar decompression with a short fusion.
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Affiliation(s)
- Shibao Lu
- Department of Orthopaedic Surgery, Beijing Xuanwu Hospital, Capital Medical University, Beijing, China.
- National Geriatric Disease Research Center, Beijing, China.
| | - Weiguo Zhu
- Department of Orthopaedic Surgery, Beijing Xuanwu Hospital, Capital Medical University, Beijing, China
- National Geriatric Disease Research Center, Beijing, China
| | - Yu Wang
- Department of Orthopaedic Surgery, Beijing Xuanwu Hospital, Capital Medical University, Beijing, China
- National Geriatric Disease Research Center, Beijing, China
| | - Chao Kong
- Department of Orthopaedic Surgery, Beijing Xuanwu Hospital, Capital Medical University, Beijing, China
- National Geriatric Disease Research Center, Beijing, China
| | - Wei Wang
- Department of Orthopaedic Surgery, Beijing Xuanwu Hospital, Capital Medical University, Beijing, China
- National Geriatric Disease Research Center, Beijing, China
| | - Xiaolong Chen
- Department of Orthopaedic Surgery, Beijing Xuanwu Hospital, Capital Medical University, Beijing, China
- National Geriatric Disease Research Center, Beijing, China
| | - Xiangyu Li
- Department of Orthopaedic Surgery, Beijing Xuanwu Hospital, Capital Medical University, Beijing, China
- National Geriatric Disease Research Center, Beijing, China
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