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Han J, Han SC, Jeong HJ, Rhee SM, Kim YS, Jin YJ, Park SH, Oh JH. Recombinant Human Parathyroid Hormone Biocomposite Promotes Bone-to-Tendon Interface Healing by Enhancing Tenogenesis, Chondrogenesis, and Osteogenesis in a Rabbit Model of Chronic Rotator Cuff Tears. Arthroscopy 2024; 40:1093-1104.e2. [PMID: 38000485 DOI: 10.1016/j.arthro.2023.09.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 09/22/2023] [Accepted: 09/28/2023] [Indexed: 11/26/2023]
Abstract
PURPOSE To investigate the effect of recombinant human parathyroid hormone (rhPTH) biocomposite on bone-to-tendon interface (BTI) healing for surgical repair of a chronic rotator cuff tear (RCT) model of rabbit, focusing on genetic, histologic, biomechanical and micro-computed tomography (CT) evaluations. METHODS Sixty-four rabbits were equally assigned to the 4 groups: saline injection (group A), nanofiber sheet alone (group B), rhPTH-soaked nanofiber sheet (nanofiber sheet was soaked with rhPTH, group C), and rhPTH biocomposite (rhPTH permeated the nanofiber sheet by coaxial electrospinning, group D). The release kinetics of rhPTH (groups C and D) was examined for 6 weeks in vitro. Nanofiber scaffolds were implanted on the surface of the repair site 6 weeks after the induction of chronic RCT. Genetic and histologic analyses were conducted 4 weeks after surgery. Furthermore, genetic, histologic, biomechanical, micro-CT, and serologic analyses were performed 12 weeks after surgery. RESULTS In vivo, group D showed the highest collagen type I alpha 1 (COL1A1), collagen type III alpha 1 (COL3A1), and bone morphogenetic protein 2 (BMP-2) messenger RNA (mRNA) expression levels (all P < .001) 4 weeks after surgery; however, there were no differences between groups at 12 weeks postsurgery. After 12 weeks postsurgery, group D showed better collagen fiber continuity and orientation, denser collagen fibers, more mature bone-to-tendon junction, and greater fibrocartilage layer formation compared with the other groups (all P < .05). Furthermore, group D showed the highest load-to-failure rate (28.9 ± 2.0 N/kg for group A, 30.1 ± 3.3 N/kg for group B, 39.7 ± 2.7 N/kg for group C, and 48.2 ± 4.5 N/kg for group D, P < .001) and micro-CT outcomes, including bone and tissue mineral density, and bone volume/total volume rate (all P < .001) at 12 weeks postsurgery. CONCLUSIONS In comparison to rhPTH-soaked nanofiber sheet and the other control groups, rhPTH biocomposite effectively accelerated BTI healing by enhancing the mRNA expression levels of COL1A1, COL3A1, and BMP-2 at an early stage and achieving tenogenesis, chondrogenesis, and osteogenesis at 12 weeks after surgical repair of a chronic RCT model of rabbit. CLINICAL RELEVANCE The present study might be a transitional study to demonstrate the efficacy of rhPTH biocomposites on BTI healing for surgical repair of chronic RCTs as an adaptable polymer biomaterial in humans.
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Affiliation(s)
- Jian Han
- Department of Orthopaedic Surgery, The First People's Hospital of Huzhou, First Affiliated Hospital of Huzhou University, Huzhou, Zhejiang, China
| | - Sheng Chen Han
- Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Korea
| | - Hyeon Jang Jeong
- Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Korea
| | - Sung Min Rhee
- Department of Orthopedic Surgery, KyungHee University Medical Center, Seoul, Korea
| | - Yeong Seo Kim
- School of Mechanical Engineering, Pusan National University, Busan, Korea
| | - Yong Jun Jin
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea
| | - Suk-Hee Park
- School of Mechanical Engineering, Pusan National University, Busan, Korea.
| | - Joo Han Oh
- Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Korea.
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Shin DI, Jin YJ, Noh S, Yun HW, Park DY, Min BH. Exosomes Secreted During Myogenic Differentiation of Human Fetal Cartilage-Derived Progenitor Cells Promote Skeletal Muscle Regeneration through miR-145-5p. Tissue Eng Regen Med 2024; 21:487-497. [PMID: 38294592 PMCID: PMC10987463 DOI: 10.1007/s13770-023-00618-w] [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] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 11/19/2023] [Accepted: 11/23/2023] [Indexed: 02/01/2024] Open
Abstract
BACKGROUND Currently, there is no apparent treatment for sarcopenia, which is characterized by diminished myoblast function. We aimed to manufacture exosomes that retain the myogenic differentiation capacity of human fetal cartilage-derived progenitor cells (hFCPCs) and investigate their muscle regenerative efficacy in myoblasts and a sarcopenia rat model. METHODS The muscle regeneration potential of exosomes (F-Exo) secreted during myogenic differentiation of hFCPCs was compared to human bone marrow mesenchymal stem cells-derived (hBMSCs) exosomes (B-Exo) in myoblasts and sarcopenia rat model. The effect of F-Exo was analyzed through known microRNAs (miRNAs) analysis. The mechanism of action of F-Exo was confirmed by measuring the expression of proteins involved in the Wnt signaling pathway. RESULTS F-Exo and B-Exo showed similar exosome characteristics. However, F-Exo induced the expression of muscle markers (MyoD, MyoG, and MyHC) and myotube formation in myoblasts more effectively than B-Exo. Moreover, F-Exo induced greater increases in muscle fiber cross-sectional area and muscle mass compared to B-Exo in a sarcopenia rat. The miR-145-5p, relevant to muscle regeneration, was found in high concentrations in the F-Exo, and RNase pretreatment reduced the efficacy of exosomes. The effects of F-Exo on the expression of myogenic markers in myoblasts were paralleled by the miR-145-5p mimics, while the inhibitor partially negated this effect. F-Exo was involved in the Wnt signaling pathway by enhancing the expression of Wnt5a and β-catenin. CONCLUSION F-Exo improved muscle regeneration by activating the Wnt signaling pathway via abundant miR-145-5p, mimicking the remarkable myogenic differentiation potential of hFCPCs.
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Affiliation(s)
- Dong Il Shin
- Department of Molecular Science and Technology, Ajou University Graduate School, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea
- Cell Therapy Center, Ajou University School of Medicine, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea
| | - Yong Jun Jin
- Cell Therapy Center, Ajou University School of Medicine, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea
- Department of Orthopedic Surgery, Ajou University School of Medicine, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea
| | - Sujin Noh
- Cell Therapy Center, Ajou University School of Medicine, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea
- Department of Biomedical Sciences, Ajou University Graduate School, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea
| | - Hee-Woong Yun
- Cell Therapy Center, Ajou University School of Medicine, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea
- Department of Orthopedic Surgery, Ajou University School of Medicine, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea
| | - Do Young Park
- Cell Therapy Center, Ajou University School of Medicine, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea
- Department of Biomedical Sciences, Ajou University Graduate School, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea
- Department of Orthopedic Surgery, Ajou University School of Medicine, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea
| | - Byoung-Hyun Min
- Department of Molecular Science and Technology, Ajou University Graduate School, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea.
- Cell Therapy Center, Ajou University School of Medicine, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea.
- Department of Orthopedic Surgery, Ajou University School of Medicine, 206 Worldcup-ro, Youngtong-gu, Suwon, 16499, Republic of Korea.
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Park DY, Park KH, Jin YJ, Yun HW, Lee JM, Chung JY, Park JY, Min BH, Lim S. Fixed-Bearing Unicompartmental Knee Arthroplasty in Tibia Vara Knees Results in Joint Surface Malalignment and Varus Joint Line Obliquity, but Does Not Affect Functional Outcomes at Greater Than 5 Years Follow-Up. J Arthroplasty 2024; 39:645-650. [PMID: 37757984 DOI: 10.1016/j.arth.2023.09.024] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 09/10/2023] [Accepted: 09/16/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND This study aimed to investigate the clinical outcomes of fixed-bearing medial unicompartmental knee arthroplasty (UKA) for tibia vara knees and the associated changes in joint space malalignment (JSM) and joint line obliquity (JLO). METHODS We retrospectively analyzed a consecutive group of 100 patients who underwent fixed-bearing medial UKA with a preoperative medial proximal tibia angle (MPTA) ≥86° (n = 50) and MPTA <86° (n = 50) and who had a minimum 5-year follow-up. Radiological parameters, including the hip-knee-ankle angle, MPTA, and the postoperative JSM and JLO, were measured. Functional evaluation was performed using the range of motion, visual analog scale, Knee Society Knee Score, Knee Society Function Score, and Western Ontario and McMaster Universities Osteoarthritis Index score. RESULTS The MPTA <86° group showed significantly higher postoperative JLO (91.8 versus 90.4°, respectively; P = .002) and JSM (6.1 versus 4.2°, respectively; P = .026) compared to the MPTA ≥86° group. Functional outcomes, including range of motion, visual analog scale, Knee Society Knee Score, Knee Society Function Score, and Western Ontario and McMaster Universities Osteoarthritis Index scores, were not significantly different between the 2 groups. CONCLUSIONS Fixed-bearing medial UKA is a safe and effective surgical option for patients who have tibia vara knees, as an increase in JLO and JSM postoperatively does not have a clinically relevant impact, even after a minimum 5-year follow-up.
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Affiliation(s)
- Do Young Park
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea; Cell Therapy Center, Ajou University Medical Center, Suwon, Korea; Ajou University Leading Convergence of Healthcare and Medicine, Institute of Science and Technology, School of Medicine, Ajou University, Suwon, Korea
| | - Ki-Hoon Park
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea; Daprtment of Orthopedic Surgery, Armed Forces Yangju Medical Center, Yangju-si, Korea
| | - Yong Jun Jin
- Cell Therapy Center, Ajou University Medical Center, Suwon, Korea
| | - Hee-Woong Yun
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea; Cell Therapy Center, Ajou University Medical Center, Suwon, Korea
| | - Jong Min Lee
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea
| | - Jun Young Chung
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea
| | - Jae-Young Park
- Department of Orthopaedic Surgery, CHA University, CHA Bundang Medical Center, Seongnam-si, Korea
| | - Byoung-Hyun Min
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea; Cell Therapy Center, Ajou University Medical Center, Suwon, Korea
| | - Sumin Lim
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea
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Koh JH, Lim S, Park JY, Chung JY, Jin YJ, Yun HW, Noh S, Park DY. Controlled posterior condylar milling technique for unicompartmental knee arthroplasty minimises tibia resection during gap balancing: Short-term clinical results. Knee Surg Sports Traumatol Arthrosc 2024; 32:499-508. [PMID: 38240064 DOI: 10.1002/ksa.12029] [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: 11/28/2023] [Accepted: 12/01/2023] [Indexed: 02/12/2024]
Abstract
PURPOSE The purpose of this study was to demonstrate the clinical utility of controlled posterior condylar milling (CPCM) in gap balancing while minimally resecting the tibia during fixed-bearing unicompartmental knee arthroplasty (UKA). METHODS This study is a retrospective cohort study. Patients who underwent medial UKA for isolated medial compartment osteoarthritis with a minimum follow-up of 2 years were included. The patients were divided into two groups: the conventional group (n = 56) and the CPCM group (n = 66). In the CPCM group, the proximal tibia was resected at the level of the distal end of the subchondral bone. If the flexion gap was tighter than extension, the posterior condyle was additionally milled to adjust gap tightness. Standing knee X-ray and scanogram were used to evaluate alignment and tibia resection amount. Range of motion (ROM) and Western Ontario McMaster Universities Osteoarthritis Index (WOMAC) scores were used to evaluate clinical outcomes. RESULTS The CPCM group showed significantly smaller tibia resection (3.6 ± 1.9 mm) compared to the conventional group (5.2 ± 2.7 mm) (p < 0.001). Postoperative ROM (133.0 ± 8.3°, 135.2 ± 7.2°, n.s.) and WOMAC (19.3 ± 13.6, 23.6 ± 17.7, n.s.) were not significantly different between the two groups. Postoperative periprosthetic fractures occurred in two patients in conventional group, while the CPCM group had no periprosthetic fractures. CONCLUSION The CPCM technique may be a simple and useful intraoperative technique that can achieve minimal tibia resection and promising clinical outcomes while easily adjusting gap tightness between flexion and extension during medial fixed-bearing UKA. LEVEL OF EVIDENCE Level III.
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Affiliation(s)
- Jeong-Hyun Koh
- Department of Orthopaedic Surgery, School of Medicine, Ajou University, Suwon, Korea
| | - Sumin Lim
- Department of Orthopaedic Surgery, School of Medicine, Ajou University, Suwon, Korea
| | - Jae-Young Park
- Department of Orthopaedic Surgery, CHA Bundang Medical Center, CHA University, Seongnam-si, Korea
| | - Jun Young Chung
- Department of Orthopaedic Surgery, School of Medicine, Ajou University, Suwon, Korea
| | - Yong Jun Jin
- Department of Orthopaedic Surgery, School of Medicine, Ajou University, Suwon, Korea
- Cell Therapy Center, Ajou University Medical Center, Suwon, Korea
| | - Hee-Woong Yun
- Department of Orthopaedic Surgery, School of Medicine, Ajou University, Suwon, Korea
- Cell Therapy Center, Ajou University Medical Center, Suwon, Korea
| | - Sujin Noh
- Cell Therapy Center, Ajou University Medical Center, Suwon, Korea
- Department of Biomedical Sciences, Graduate School of Ajou University, Suwon, Korea
| | - Do Young Park
- Department of Orthopaedic Surgery, School of Medicine, Ajou University, Suwon, Korea
- Cell Therapy Center, Ajou University Medical Center, Suwon, Korea
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Noh S, Lee SJ, Yoo JJ, Jin YJ, Yun HW, Min BH, Park JY, Park DY. Synovium-Derived Mesenchymal Stem Cell-Based Scaffold-Free Fibrocartilage Engineering for Bone-Tendon Interface Healing in an Anterior Cruciate Ligament Reconstruction Model. Tissue Eng Regen Med 2024; 21:341-351. [PMID: 37856071 PMCID: PMC10825091 DOI: 10.1007/s13770-023-00593-2] [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] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/21/2023] [Accepted: 08/27/2023] [Indexed: 10/20/2023] Open
Abstract
BACKGROUND Current tendon and ligament reconstruction surgeries rely on scar tissue healing which differs from native bone-to-tendon interface (BTI) tissue. We aimed to engineer Synovium-derived mesenchymal stem cells (Sy-MSCs) based scaffold-free fibrocartilage constructs and investigate in vivo bone-tendon interface (BTI) healing efficacy in a rat anterior cruciate ligament (ACL) reconstruction model. METHODS Sy-MSCs were isolated from knee joint of rats. Scaffold-free sy-MSC constructs were fabricated and cultured in differentiation media including TGF-β-only, CTGF-only, and TGF-β + CTGF. Collagenase treatment on tendon grafts was optimized to improve cell-to-graft integration. The effects of fibrocartilage differentiation and collagenase treatment on BTI integration was assessed by conducting histological staining, cell adhesion assay, and tensile testing. Finally, histological and biomechanical analyses were used to evaluate in vivo efficacy of fibrocartilage construct in a rat ACL reconstruction model. RESULTS Fibrocartilage-like features were observed with in the scaffold-free sy-MSC constructs when applying TGF-β and CTGF concurrently. Fifteen minutes collagenase treatment increased cellular attachment 1.9-fold compared to the Control group without affecting tensile strength. The failure stress was highest in the Col + D + group (22.494 ± 13.74 Kpa) compared to other groups at integration analysis in vitro. The ACL Recon + FC group exhibited a significant 88% increase in estimated stiffness (p = 0.0102) compared to the ACL Recon group at the 4-week postoperative period. CONCLUSION Scaffold-free, fibrocartilage engineering together with tendon collagenase treatment enhanced fibrocartilaginous BTI healing in ACL reconstruction.
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Affiliation(s)
- Sujin Noh
- Department of Biomedical Sciences, Graduate School of Ajou University, 206 World Cup-Ro, Yeongtong-Gu, Suwon, Republic of Korea
| | - Sang Jin Lee
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC, 27157, USA
| | - James J Yoo
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC, 27157, USA
| | - Yong Jun Jin
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea
| | - Hee-Woong Yun
- Cell Therapy Center, Ajou Medical Center, Suwon, Republic of Korea
| | - Byoung-Hyun Min
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC, 27157, USA
| | - Jae-Young Park
- Department of Orthopedics Surgery, CHA University Bundang Medical Center, Bundang-Gu, Seongnam-Si, Gyeonggi-Do, Republic of Korea
| | - Do Young Park
- Department of Biomedical Sciences, Graduate School of Ajou University, 206 World Cup-Ro, Yeongtong-Gu, Suwon, Republic of Korea.
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea.
- Cell Therapy Center, Ajou Medical Center, Suwon, Republic of Korea.
- Leading Convergence of Healthcare and Medicine, Institute of Science & Technology (ALCHeMIST), Ajou University, Suwon, Republic of Korea.
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Ren ZG, Xu Y, Hua ZZ, Mo ZY, Wang LW, Shi GB, Liu WL, Sun W, Zheng BQ, Wang CM, Jin YJ, Chen Y. [Efficacy of adjuvant programmed cell death 1 (PD-1) monoclonal antibody immunotherapy in Chinese patients with resected stage Ⅱ-Ⅲ melanoma]. Zhonghua Zhong Liu Za Zhi 2023; 45:973-980. [PMID: 37968084 DOI: 10.3760/cma.j.cn112152-20230331-00140] [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] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
Objective: To explore the efficacy of adjuvant programmed cell death 1 (PD-1) monoclonal antibody immunotherapy in Chinese patients with resected stage Ⅱ-Ⅲ melanoma. Methods: A total of 296 patients who underwent radical surgery for stage Ⅱ-Ⅲ cutaneous orlimb melanoma at Fudan University Shanghai Cancer Center and Shanghai Electric Power Hospital between 2017 and 2021 and received adjuvant PD-1 monoclonal antibody immunotherapy, low-dose interferon (IFN), or observational follow-up were enrolled in this study. Patients were divided into the PD-1 monoclonal antibody group (164 cases) and the IFN or observation group (IFN/OBS group, 132 cases) based on postoperative adjuvant treatment methods. Patients' disease recurrence and survival were observed. Results: Among the 296 patients, 77 had cutaneous melanoma and 219 had limb melanoma; 110 were stage Ⅱ and 186 were stage Ⅲ. Among stage Ⅱ patients, the median recurrence-free survival (RFS) in the PD-1 monoclonal antibody group (46 cases) did not reach, while the median RFS in the IFN/OBS group (64 cases) was 36 months. The 1-year RFS rates were 85.3% and 92.1% and the 2-year RFS rates were 71.9% and 63.7% in the PD-1 monoclonal antibody group and the IFN/OBS group, respectively, with no statistically significant difference (P=0.394). Among stage Ⅲ patients, the median RFS rates in the PD-1 monoclonal antibody group (118 cases) and the IFN/OBS group (68 cases) were 23 and 13 months, respectively. The 1-year RFS rates were 70.0% and 51.8% and the 2-year RFS rates were 51.8% and 35.1%in the PD-1 monoclonal antibody group and the IFN/OBS group, respectively, with a statistically significant difference (P=0.010). Stratified analysis showed that the advantage of PD-1 monoclonal antibody adjuvant therapy in improving RFS persisted in the subgroups of primary ulceration (HR=0.558, 95% CI: 0.348-0.893), lymph node macroscopic metastasis (HR=0.486, 95% CI: 0.285-0.828), stage ⅢC (HR=0.389, 95% CI: 0.24-0.63), and the subgroup without BRAF/c-Kit/NRAS gene mutations (HR=0.347, 95% CI: 0.171-0.706). In terms of recurrence patterns, in stage Ⅱ patients, the recurrence and metastasis rate was 15.2% (7/46) in the PD-1 monoclonal antibody group, significantly lower than the IFN/OBS group [43.8% (28/64), P=0.002]. In stage Ⅲ melanoma patients, the recurrence and metastasis rate was 42.4% (50/118) in the PD-1 monoclonal antibody group, also lower than the IFN/OBS group [63.2% (43/68), P=0.006]. Conclusions: In real-world settings, compared with patients receiving low-dose IFN adjuvant therapy or observational follow-up, PD-1 monoclonal antibody immunotherapy can reduce the recurrence and metastasis rate of cutaneous and limb melanoma, and prolong the postoperative RFS of stage Ⅲ cutaneous and limb melanoma patients. Patients with a heavier tumor burden benefit more from immunotherapy.
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Affiliation(s)
- Z G Ren
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - Y Xu
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Z Z Hua
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - Z Y Mo
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - L W Wang
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - G B Shi
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - W L Liu
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - W Sun
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - B Q Zheng
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - C M Wang
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Y J Jin
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - Y Chen
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
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Park DY, Chung JY, Jin YJ, Yoon HS, Min BH, Park JY, Lim S. Lateral Retinacular Release During Medial Unicompartmental Knee Arthroplasty in the Presence of Patello-Femoral Joint Arthritis Relieves Patello-Femoral Joint Pressure and Improves Associated Symptoms. J Arthroplasty 2023; 38:2288-2294. [PMID: 37271229 DOI: 10.1016/j.arth.2023.05.049] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 05/15/2023] [Accepted: 05/20/2023] [Indexed: 06/06/2023] Open
Abstract
BACKGROUND This study evaluated the effects of concomitant lateral patellar retinacular release (LPRR) during medial unicompartmental knee arthroplasty (UKA). METHODS We retrospectively analyzed 100 patients who had patello-femoral joint (PFJ) arthritis who underwent medial UKA with (n = 50) and without (n = 50) LPRR who had ≥2 years follow-up. Radiological parameters associated with lateral retinacular tightness, including patellar tilt angle (PTA), lateral patello-femoral angle (LPFA), and congruence angle, were measured. Functional evaluation was performed using the Knee Society Pain Score, Knee Society Function Score (KSFS), Kujala Score, and the Western Ontario McMaster Universities Osteoarthritis Index score. Intraoperative patello-femoral pressure evaluation was performed on 10 knees to evaluate the pressure changes before and after LPRR. Mann-Whitney U-tests were used for statistical analyses. RESULTS Demographic data did not differ between the LPRR(+) and LPRR(-) groups. A decrease in PTA and an increase in LPFA were observed in the LPRR(+) group compared to those in the LPRR(-) group (PTA; -0.54 versus -1.74, P = .002, LPFA; 0.51 versus 2.01, P = .010). The LPRR(+) group showed significantly better KSFS and Kujala scores than the LPRR(-) group (KSFS: 90 versus 80, P = .017; Kujala score: 86 versus 79, P = .009). Intraoperative patello-femoral pressure analysis showed a 22.6% reduction in the PFJ contact pressure and an 18.7% reduction in PFJ peak pressure after LPRR. (P = .0015, P < .0001, respectively) CONCLUSION: A LPRR during UKA may be a simple and useful adjunct procedure to relieve PFJ symptoms with concomitant PFJOA.
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Affiliation(s)
- Do Young Park
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea; Cell Therapy Center, Ajou University Medical Center, Suwon, Korea
| | - Jun Young Chung
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea
| | - Yong Jun Jin
- Cell Therapy Center, Ajou University Medical Center, Suwon, Korea
| | - Ha Seung Yoon
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea
| | - Byoung-Hyun Min
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea; Cell Therapy Center, Ajou University Medical Center, Suwon, Korea; Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | - Jae-Young Park
- Department of Orthopaedic Surgery, CHA Bundang Medical Center, CHA University, Seongnam-si, Gyeonggi-do, Korea
| | - Sumin Lim
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Korea
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Noh S, Jin YJ, Shin DI, Kwon HJ, Yun HW, Kim KM, Park JY, Chung JY, Park DY. Selective Extracellular Matrix Guided Mesenchymal Stem Cell Self-Aggregate Engineering for Replication of Meniscal Zonal Tissue Gradient in a Porcine Meniscectomy Model. Adv Healthc Mater 2023; 12:e2301180. [PMID: 37463568 DOI: 10.1002/adhm.202301180] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/13/2023] [Accepted: 07/14/2023] [Indexed: 07/20/2023]
Abstract
Degenerative meniscus tears (DMTs) are prevalent findings in osteoarthritic knees, yet current treatment is mostly limited to arthroscopic partial meniscectomy rather than regeneration, which further exacerbates arthritic changes. Translational research regarding meniscus regeneration is hindered by the complex, composite nature of the meniscus which exhibit a gradient from inner cartilage-like tissue to outer fibrous tissue, as well as engineering hurdles often requiring growth factors and cross-linking agents. Here, a meniscus zonal tissue gradient is proposed using zone-specific decellularized meniscus extracellular matrix (DMECM) and autologous synovial mesenchymal stem cells (SMSC) via self-aggregation without the use of growth factors or cross-linking agents. Combination with zone-specific DMECM during self-aggregation of MSCs forms zone-specific meniscus tissue that reflects the respective DMECM harvest site. The implantation of these constructs leads to the regeneration of meniscus tissue resembling the native meniscus, demonstrating inner cartilaginous and outer fibrous characteristics as well as recovery of native meniscal microarchitecture in a porcine partial meniscectomy model at 6 months. In all, the findings offer a potential regenerative therapy for DMTs that may improve current partial meniscectomy-based patient care.
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Affiliation(s)
- Sujin Noh
- Department of Biomedical Sciences, Graduate School of Ajou University, Suwon, 16499, Republic of Korea
| | - Yong Jun Jin
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
| | - Dong Il Shin
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, Republic of Korea
| | - Hyeon Jae Kwon
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, Republic of Korea
| | - Hee-Woong Yun
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
- Cell Therapy Center, Ajou Medical Center, Suwon, 16499, Republic of Korea
| | - Kyu Min Kim
- Cell Therapy Center, Ajou Medical Center, Suwon, 16499, Republic of Korea
| | - Jae-Young Park
- Department of Orthopedics Surgery, CHA University Bundang Medical Center, Bundang-gu, Seongnam-si, Gyeonggi-do, 13496, Republic of Korea
| | - Jun Young Chung
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
| | - Do Young Park
- Department of Biomedical Sciences, Graduate School of Ajou University, Suwon, 16499, Republic of Korea
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, 16499, Republic of Korea
- Cell Therapy Center, Ajou Medical Center, Suwon, 16499, Republic of Korea
- Ajou University, Leading Convergence of Healthcare and Medicine, Institute of Science & Technology (ALCHeMIST), Suwon, 16499, Republic of Korea
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9
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Yun HW, Jin YJ, Shin DI, Noh S, Kim KM, Park JY, Lim S, Park DY. Fibrocartilage extracellular matrix augmented demineralized bone matrix graft repairs tendon-to-bone interface in a rabbit tendon reconstruction model. Biomater Adv 2023; 152:213522. [PMID: 37343332 DOI: 10.1016/j.bioadv.2023.213522] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/30/2023] [Accepted: 06/12/2023] [Indexed: 06/23/2023]
Abstract
Current tendon/ligament reconstructions integrate via scar tissue rather than proper bone-tendon interface regeneration, which affects graft longevity, changes in bone tunnel size, and functional outcomes. The purpose of this study was to develop a functional demineralized bone matrix (DBM) + fibrocartilage extracellular matrix (FCECM) composite scaffold, characterize its physicochemical properties, and evaluate its efficacy in repairing tendon-bone interface in a rabbit tendon reconstruction model. Solubilized FCECM was loaded and crosslinked on to DBM scaffolds via gamma-irradiation to create DBM + FCECM scaffolds. The resulting scaffold showed interconnected pores coated with FCECM and protein cargo similar to FCECM. The addition of FCECM modified the physicochemical properties of the DBM scaffold, including microstructure, biochemical composition, mechanical strength, thermodynamic properties, and degradation period. The DBM + FCECM scaffold was biocompatible for mesenchymal stem cells (MSCs) and resulted in elevation of fibrochondrogenic gene markers compared to DBM scaffolds in vitro. In vivo implantation of DBM + FCECM scaffold resulted in neofibrocartilage formation, better pullout strength, and less bone tunnel widening compared to DBM only group in a rabbit tendon reconstruction model. In conclusion, the FCECM augmented DBM scaffold repairs the tendon-bone interface with osseous-fibrocartilage tissue, which may be utilized to improve current tendon reconstruction surgeries.
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Affiliation(s)
- Hee-Woong Yun
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea; Cell Therapy Center, Ajou Medical Center, Suwon, Republic of Korea
| | - Yong Jun Jin
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea; Cell Therapy Center, Ajou Medical Center, Suwon, Republic of Korea
| | - Dong Il Shin
- Cell Therapy Center, Ajou Medical Center, Suwon, Republic of Korea; Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Sujin Noh
- Cell Therapy Center, Ajou Medical Center, Suwon, Republic of Korea; Department of Biomedical Sciences, Graduate School of Ajou University, Suwon, Republic of Korea
| | - Kyu Min Kim
- Cell Therapy Center, Ajou Medical Center, Suwon, Republic of Korea
| | - Jae-Young Park
- Department of Orthopedic Surgery, CHA Bundang Medical Center, School of Medicine, CHA University, Pocheon 13496, Gyeonggi-do, Republic of Korea
| | - Sumin Lim
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea; Cell Therapy Center, Ajou Medical Center, Suwon, Republic of Korea
| | - Do Young Park
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea; Cell Therapy Center, Ajou Medical Center, Suwon, Republic of Korea.
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10
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Jin YJ, Park DY, Noh S, Kwon H, Shin DI, Park JH, Min BH. Effects of glycosaminoglycan content in extracellular matrix of donor cartilage on the functional properties of osteochondral allografts evaluated by micro-CT non-destructive analysis. PLoS One 2023; 18:e0285733. [PMID: 37220126 DOI: 10.1371/journal.pone.0285733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/28/2023] [Indexed: 05/25/2023] Open
Abstract
Osteochondral allograft (OCA) is an important surgical procedure used to repair extensive articular cartilage damage. It is known that chondrocyte viability is crucial for maintaining the biochemical and biomechanical properties of OCA, which is directly related to the clinical success of the operation and is the only standard for preoperative evaluation of OCA. However, there is a lack of systematic research on the effect of the content of cellular matrix in OCA cartilage tissue on the efficacy of transplantation. Therefore, we evaluated the effect of different GAG contents on the success of OCA transplantation in a rabbit animal model. Each rabbit OCA was treated with chondroitinase to regulate glycosaminoglycan (GAG) content in the tissue. Due to the different action times of chondroitinase, they were divided into 4 experimental groups (including control group, 2h, 4h, and 8h groups). The treated OCAs of each group were used for transplantation. In this study, transplant surgery effects were assessed using micro-computed tomography (μCT) and histological analysis. Our results showed that tissue integration at the graft site was poorer in the 4h and 8h groups compared to the control group at 4 and 12 weeks in vivo, as were the compressive modulus, GAG content, and cell density reduced. In conclusion, we evaluated the biochemical composition of OCAs before and after surgery using μCT analysis and demonstrated that the GAG content of the graft decreased, it also decreased during implantation; this resulted in decreased chondrocyte viability after transplantation and ultimately affected the functional success of OCAs.
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Affiliation(s)
- Yong Jun Jin
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea
- Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea
| | - Do Young Park
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea
- Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea
| | - Sujin Noh
- Department of Biomedical Sciences, Graduate School of Ajou University, Suwon, Republic of Korea
| | - HyeonJae Kwon
- Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Dong Il Shin
- Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Jin Ho Park
- Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Byoung-Hyun Min
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea
- Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
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11
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Zhang ZW, Jin YJ, Zhao SJ, Zhou LN, Huang Y, Wang JW, Tang W, Wu N. [Prevalence and risk factors of coronary artery calcification on lung cancer screening with low-dose CT]. Zhonghua Zhong Liu Za Zhi 2022; 44:1112-1118. [PMID: 36319457 DOI: 10.3760/cma.j.cn112152-20201114-00986] [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] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Objective: To investigate the prevalence and risk factors of coronary artery calcification (CAC) on lung cancer screening with low-dose computed tomography (LDCT). Methods: A total of 4 989 asymptomatic subjects (2 542 males and 2 447 females) who underwent LDCT lung cancer screening were recruited at Cancer Hospital, Chinese Academy of Medical Sciences from 2014 to 2017. The visual scoring method was used to assess coronary artery calcification score. χ(2) test or independent t-test was used to compare the difference of CAC positive rate among different groups. Multivariate logistic regression was used to analyze risk factors associated with CAC in the study. Results: Of the 4 989 asymptomatic subjects, CAC occurred in 1 018 cases. The positive rate was 20.4%, of which mild, moderate and severe calcification accounted for 86.3%, 11.4% and 2.3%, respectively. Gender, age, BMI, education level, occupation, smoking history, diabetes, hypertension and hyperlipidemia had statistically significant differences in CAC positive rates among groups. Multivariate logistic regression analysis showed that gender, age, diabetes, hypertension, hyperlipidemia and smoking history were risk factors for CAC. Age, diabetes, hypertension and smoking history were statistically significant risk factors between the mild and moderate CAC group. A total of 1 730 coronary arteries in 1 018 CAC positive cases had calcification, CAC positive rate of left anterior descending was the highest(51.3%); 568 cases (55.8%) were single vessel calcification, 450 cases (44.2%) were multiple vessel calcification. Conclusions: LDCT can be used for the 'one-stop' early detection of lung cancer and coronary atherosclerosis. Gender, age, diabetes, hypertension, hyperlipidemia and smoking are related risk factors for coronary atherosclerosis.
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Affiliation(s)
- Z W Zhang
- Department of Nuclear Medicine, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021 China
| | - Y J Jin
- Department of Nuclear Medicine, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021 China
| | - S J Zhao
- Department of Diagnostic Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - L N Zhou
- Department of Diagnostic Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y Huang
- Department of Diagnostic Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J W Wang
- Department of Diagnostic Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - W Tang
- Department of Diagnostic Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - N Wu
- Department of Nuclear Medicine, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021 China
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12
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Gong YF, Luo ZW, Feng JX, Xue JB, Guo ZY, Jin YJ, Yu Q, Xia S, Lü S, Xu J, Li SZ. [Prediction of trends for fine-scale spread of Oncomelania hupensis in Shanghai Municipality based on supervised machine learning models]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2022; 34:241-251. [PMID: 35896487 DOI: 10.16250/j.32.1374.2021247] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To predict the trends for fine-scale spread of Oncomelania hupensis based on supervised machine learning models in Shanghai Municipality, so as to provide insights into precision O. hupensis snail control. METHODS Based on 2016 O. hupensis snail survey data in Shanghai Municipality and climatic, geographical, vegetation and socioeconomic data relating to O. hupensis snail distribution, seven supervised machine learning models were created to predict the risk of snail spread in Shanghai, including decision tree, random forest, generalized boosted model, support vector machine, naive Bayes, k-nearest neighbor and C5.0. The performance of seven models for predicting snail spread was evaluated with the area under the receiver operating characteristic curve (AUC), F1-score and accuracy, and optimal models were selected to identify the environmental variables affecting snail spread and predict the areas at risk of snail spread in Shanghai Municipality. RESULTS Seven supervised machine learning models were successfully created to predict the risk of snail spread in Shanghai Municipality, and random forest (AUC = 0.901, F1-score = 0.840, ACC = 0.797) and generalized boosted model (AUC= 0.889, F1-score = 0.869, ACC = 0.835) showed higher predictive performance than other models. Random forest analysis showed that the three most important climatic variables contributing to snail spread in Shanghai included aridity (11.87%), ≥ 0 °C annual accumulated temperature (10.19%), moisture index (10.18%) and average annual precipitation (9.86%), the two most important vegetation variables included the vegetation index of the first quarter (8.30%) and vegetation index of the second quarter (7.69%). Snails were more likely to spread at aridity of < 0.87, ≥ 0 °C annual accumulated temperature of 5 550 to 5 675 °C, moisture index of > 39% and average annual precipitation of > 1 180 mm, and with the vegetation index of the first quarter of > 0.4 and the vegetation index of the first quarter of > 0.6. According to the water resource developments and township administrative maps, the areas at risk of snail spread were mainly predicted in 10 townships/subdistricts, covering the Xipian, Dongpian and Tainan sections of southern Shanghai. CONCLUSIONS Supervised machine learning models are effective to predict the risk of fine-scale O. hupensis snail spread and identify the environmental determinants relating to snail spread. The areas at risk of O. hupensis snail spread are mainly located in southwestern Songjiang District, northwestern Jinshan District and southeastern Qingpu District of Shanghai Municipality.
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Affiliation(s)
- Y F Gong
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Z W Luo
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - J X Feng
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - J B Xue
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Z Y Guo
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Y J Jin
- Shanghai Municipal Center for Disease Control and Prevention, China
| | - Q Yu
- Shanghai Municipal Center for Disease Control and Prevention, China
| | - S Xia
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - S Lü
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - J Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - S Z Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
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13
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Yu Q, Pan H, Jiang L, Zhu M, Jin YJ, Wang ZY. [Potential transmission risk of key parasitic diseases and responses to the risk during the construction of an ecological city in Shanghai Municipality]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2022; 34:531-536. [PMID: 36464251 DOI: 10.16250/j.32.1374.2021217] [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] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
A blueprint on Shanghai's ecological space design between 2021 and 2035 was released in 2021, aiming to build an ecological city and improve the development of ecological civilization. The transmission of parasitic diseases is strongly associated with climate and ecological environments. Currently, the prevalence of parasitic diseases has been maintained at extremely low-transmission levels, and there are almost no local cases; however, the alteration of ecological environments may results in a potential transmission risk of parasitic diseases. Hereby, the current status of key parasitic diseases in Shanghai Municipality was described, and the potential transmission risk of parasitic diseases and responses to this risk were analyzed during the construction of an ecological city in Shanghai Municipality. In addition, the suggestions pertaining to surveillance and management of parasitic diseases were proposed during the mid- and long-term construction of an ecological city in Shanghai Municipality.
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Affiliation(s)
- Q Yu
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
- Co-first authors
| | - H Pan
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
- Co-first authors
| | - L Jiang
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
| | - M Zhu
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
| | - Y J Jin
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
| | - Z Y Wang
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
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Park DY, Yin XY, Chung JY, Jin YJ, Kwon HJ, Lee GB, Park JH, Min BH. Circumferential Rim Augmentation Suture Around the Perimeniscal Capsule Decreases Meniscal Extrusion and Progression of Osteoarthritis in Rabbit Meniscus Root Tear Model. Am J Sports Med 2022; 50:689-698. [PMID: 35289232 DOI: 10.1177/03635465211064297] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND We recently analyzed the joint capsule adjacent to the medial meniscus and found that the perimeniscal joint capsule has collagen fiber orientation similar to that of circumferential meniscal fibers, potentially playing a role in preventing extrusion. PURPOSE To analyze the meniscal extrusion prevention potential of the circumferential rim augmentation suture around the perimeniscal capsule in a rabbit root tear model and analyze the biomechanical function in a porcine cadaveric knee. STUDY DESIGN Controlled laboratory study. METHODS Rabbit medial meniscus root tear models were divided into 3 experimental groups: root tear, root tear and suture repair, and root tear and circumferential rim augmentation suture. As for the circumferential rim augmentation suture procedure, a suture was placed to circumscribe the outer rim of the medial meniscus and passed through bone tunnels located at the tibial insertion of each root. After 4 and 8 weeks, meniscal extrusion was analyzed by micro-computed tomography, gross morphology, and histologic analysis of the medial femoral cartilage. For biomechanical analysis, porcine knees were divided into groups similar to rabbit experiments. Tibiofemoral contact parameters were assessed using a pressure mapping sensor system after applying a load of 200 N on the knee joint. RESULTS The root tear and circumferential rim augmentation suture group showed less meniscal extrusion, less gap within the tear site, and less cartilage degeneration compared with other groups after 4 and 8 weeks of surgery in the rabbit root tear model. Biomechanical analysis showed the root tear and circumferential rim augmentation suture group had larger contact area and lower peak contact pressure compared with root tear and root tear and suture repair groups. CONCLUSION The circumferential rim augmentation suture reduced the degree of meniscal extrusion while restoring meniscal function, potentially preventing progression of arthritis in a rabbit root tear model and porcine knee biomechanical analysis. CLINICAL RELEVANCE The circumferential rim augmentation suture may be a novel augmentation option during root tear treatment.
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Affiliation(s)
- Do Young Park
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea.,Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea
| | - Xiang Yun Yin
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea.,Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea
| | - Jun Young Chung
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea
| | - Yong Jun Jin
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea.,Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea
| | - Hyeon Jae Kwon
- Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea.,Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Ga Bin Lee
- Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea.,Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Jin Ho Park
- Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea.,Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Byoung-Hyun Min
- Department of Orthopedic Surgery, School of Medicine, Ajou University, Suwon, Republic of Korea.,Cell Therapy Center, Ajou University Medical Center, Suwon, Republic of Korea.,Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
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15
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Dai SM, Yu Q, Ma XJ, Wang ZY, Zhang YG, Zhu M, Zhang CG, Zhu Q, Jiang L, Jin YJ, Pan H, Wu HY. [Prevalence of Clonorchis sinensis infections in freshwater fish in mainland China: A meta-analysis]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2021; 34:16-27. [PMID: 35266353 DOI: 10.16250/j.32.1374.2021230] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE To understand the real prevalence of Clonorchis sinensis infections in the freshwater fish in mainland China, so as to provide insights into clonorchiasis control and detection of freshwater fish. METHODS All literatures reporting the prevalence of C. sinensis infections in the freshwater fish, the second intermediate host of the parasite, were jointly retrieved in Chinese and English electronic databases from January 1, 2010 to December 31, 2020, including Wanfang Data, CNKI, PubMed, Web of Science, Embase and Cochrane Library. All studies were screened based on inclusion and exclusion criteria, and the quality of all enrolled literatures was evaluated. The pooled prevalence of C. sinensis infections in freshwater fish and its 95% confidence interval (CI) were estimated using the software Stata version 15.0, and subgroup analyses were performed to investigate the region-, season- and sample source-specific pooled prevalence of C. sinensis infections in freshwater fish. In addition, the sensitivity and publication bias of all included studies were analyzed. RESULTS A total of 40 eligible literatures were included in this study, including 37 Chinese literatures and 3 English literatures, and there were 10 high-quality literatures, 27 moderate-quality literatures and 3 low-quality literatures. A total of 53 species containing 37 959 freshwater fish were reported in these 40 studies, and 73.58% (39/53) of freshwater fish species were identified with C. sinensis infections. Meta-analysis showed 23.5% [95% CI: (0.19, 0.28)] pooled prevalence of C. sinensis infections in freshwater fish in mainland China, and subgroup analyses higher prevalence of C. sinensis infections in freshwater fish in northeastern China [35.7%, 95% CI: (0.22, 0.50)] than in central [25.9%, 95% CI: (0.04, 0.48)] and southern China [20.6%, 95% CI: (0.09, 0.32)], higher prevalence of C. sinensis infections in freshwater fish sampled in spring [44.1%, 95% CI: (0.35, 0.53)] than in autumn [6.7%, 95% CI: (0.05, 0.08)] and summer [3.3%, 95% CI: (-0.01, 0.07)], and higher prevalence of C. sinensis infections in freshwater fish sampled from natural water [25.2%, 95% CI: (0.17, 0.33)] than from retail trades [22.2%, 95% CI: (0.17, 0.28)] and breeding chain [12.3%, 95% CI: (0.03, 0.22)]. However, all included studies had a publication bias with a low sensitivity. CONCLUSIONS The prevalence of C. sinensis infections is high in freshwater fish in mainland China, and there are still challenges for clonorchiasis control. Reinforcement of health education, diagnostics development and food safety supervision is recommended in future clonorchiasis control programs.
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Affiliation(s)
- S M Dai
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - Q Yu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - X J Ma
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - Z Y Wang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - Y G Zhang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - M Zhu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - C G Zhang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - Q Zhu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - L Jiang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - Y J Jin
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - H Pan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - H Y Wu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
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16
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Chen ZJ, Wang R, Xia BW, Zheng BB, Jin YJ, Zhao YJ, Xu H. Three-Dimensional Dirac Phonons with Inversion Symmetry. Phys Rev Lett 2021; 126:185301. [PMID: 34018763 DOI: 10.1103/physrevlett.126.185301] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 05/23/2020] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
Dirac semimetals associated with bulk Dirac fermions are well known in topological electronic systems. In sharp contrast, three-dimensional (3D) Dirac phonons in crystalline solids are still unavailable. Here we perform symmetry arguments and first-principles calculations to systematically investigate 3D Dirac phonons in all space groups with inversion symmetry. The results show that there are two categories of 3D Dirac phonons depending on their protection mechanisms and positions in momentum space. The first category originates from the four-dimensional irreducible representations at the high symmetry points. The second category arises from the phonon branch inversion, and the symmetry guarantees Dirac points to be located along the high symmetry lines. Furthermore, we reveal that nonsymmorphic symmetries and the combination of inversion and time-reversal symmetries play essential roles in the emergence of 3D Dirac phonons. Our work not only offers a comprehensive understanding of 3D Dirac phonons but also provides significant guidance for exploring Dirac bosons in both phononic and photonic systems.
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Affiliation(s)
- Z J Chen
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
- Department of Physics and Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - R Wang
- Institute for Structure and Function and Department of Physics and Center for Quantum Materials and Devices, Chongqing University, Chongqing 400044, People's Republic of China
| | - B W Xia
- Department of Physics and Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - B B Zheng
- Department of Physics and Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Y J Jin
- Department of Physics and Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Yu-Jun Zhao
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - H Xu
- Department of Physics and Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
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Lü S, Lü C, Li YL, Xu J, Hong QB, Zhou J, Zhang JF, Wen LY, Zhang JF, Zhang SQ, Lin DD, Liu JB, Ren GH, Dong Y, Liu Y, Yang K, Jiang ZH, Deng ZH, Jin YJ, Xie HG, Zhou YB, Wang TP, Liu YW, Zhu HQ, Cao CL, Li SZ, Zhou XN. [Expert consensus on the strategy and measures to interrupt the transmission of schistosomiasis in China]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2021; 33:10-14. [PMID: 33660468 DOI: 10.16250/j.32.1374.2021007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Since 2015 when the transmission of schistosomiasis was controlled in China, the country has been moving towards elimination of schistosomiasis, with the surveillance-response as the main interventions for schistosomiasis control. During the period of the 13th Five-Year Plan, the transmission of schistosomiasis had been interrupted in four provinces of Sichuan, Jiangsu, Yunnan and Hubei and the prevalence of schistosomiasis has been at the historically lowest level in China. As a consequence, the goal set in The 13th Five-Year National Schistosomiasis Control Program in China is almost achieved. However, there are multiple challenges during the stage moving towards elimination of schistosomiasis in China, including the widespread distribution of intermediate host snails and complicated snail habitats, many types of sources of Schistosoma japonicum infections and difficulty in management of bovines and sheep, unmet requirements for the current schistosomiasis control program with the currently available tools, and vulnerable control achievements. During the 14th Five-Year period, it is crucial to consolidate the schistosomiasis control achievements and gradually solve the above difficulties, and critical to provide the basis for achieving the ultimate goal of elimination of schistosomiasis in China. Based on the past experiences from the national schistosomiasis control program and the challenges for schistosomiasis elimination in China, an expert consensus has been reached pertaining to the objectives, control strategy and measures for The 14th Five-Year National Schistosomiasis Control Program in China, so as to provide insights in to the development of The 14th Five-Year National Schistosomiasis Control Program in China.
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Affiliation(s)
- S Lü
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - C Lü
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - Y L Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - J Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - Q B Hong
- Jiangsu Institute of Parasitic Diseases, China
| | - J Zhou
- Hunan Provincial Institute of Schistosomiasis Control, China
| | - J F Zhang
- Jiangsu Institute of Parasitic Diseases, China
| | - L Y Wen
- Zhejiang Provincial Center for Schistosomiasis Control, China
| | - J F Zhang
- Zhejiang Provincial Center for Schistosomiasis Control, China
| | - S Q Zhang
- Anhui Provincial Institute of Schistosomiasis Control, China
| | - D D Lin
- Jiangxi Provincial Institute of Parasitic Disease Control, China
| | - J B Liu
- Hubei Provincial Center for Disease Control and Prevention, China
| | - G H Ren
- Hunan Provincial Institute of Schistosomiasis Control, China
| | - Y Dong
- Yunnan Institute of Endemic Disease Control and Prevention, China
| | - Y Liu
- Sichuan Provincial Center for Disease Control and Prevention, China
| | - K Yang
- Jiangsu Institute of Parasitic Diseases, China
| | - Z H Jiang
- Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, China
| | - Z H Deng
- Guangdong Provincial Center for Disease Control and Prevention, China
| | - Y J Jin
- Shanghai Municipal Center for Disease control and Prevention, China
| | - H G Xie
- Fujian Provincial Center for Disease Control and Prevention, China
| | - Y B Zhou
- School of Public Health, Fudan University, China
| | - T P Wang
- Anhui Provincial Institute of Schistosomiasis Control, China
| | - Y W Liu
- Jiangxi Provincial Institute of Parasitic Disease Control, China
| | - H Q Zhu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - C L Cao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - S Z Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - X N Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
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Jin YJ, Zheng BB, Xiao XL, Chen ZJ, Xu Y, Xu H. Two-Dimensional Dirac Semimetals without Inversion Symmetry. Phys Rev Lett 2020; 125:116402. [PMID: 32976001 DOI: 10.1103/physrevlett.125.116402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 08/19/2020] [Indexed: 06/11/2023]
Abstract
Realizing stable two-dimensional (2D) Dirac points against spin-orbit coupling (SOC) has attracted much attention because it provides a platform to study the unique transport properties. In previous work, Young and Kane [Phys. Rev. Lett. 115, 126803 (2015)PRLTAO0031-900710.1103/PhysRevLett.115.126803 proposed stable 2D Dirac points with SOC, in which the Berry curvature and edge states vanish due to the coexistence of inversion and time-reversal symmetries. Herein, using the tight-binding model and k·p effective Hamiltonian, we present that 2D Dirac points can survive in the presence of SOC without inversion symmetry. Such 2D Dirac semimetals possess nonzero Berry curvature near the crossing nodes, and two edge states are terminated at one pair of Dirac points. In addition, according to symmetry arguments and high-throughput first-principles calculations, we identify a family of ideal 2D Dirac semimetals, which has nonzero Berry curvature in the vicinity of Dirac points and visible edge states, thus facilitating the experimental observations. Our work shows that 2D Dirac points can emerge without inversion symmetry, which not only enriches the classification of 2D topological semimetals but also provides a promising avenue to observe exotic transport phenomena beyond graphene, e.g., nonlinear Hall effect.
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Affiliation(s)
- Y J Jin
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
| | - B B Zheng
- College of Physics and Optoelectronic Technology & Advanced Titanium Alloys and Functional Coatings Cooperative Innovation Center, Baoji University of Arts and Sciences, Baoji 721016, People's Republic of China
| | - X L Xiao
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Department of Physics, Chongqing University, Chongqing 400044, People's Republic of China
| | - Z J Chen
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Y Xu
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - H Xu
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
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Oh JK, Hong JT, Kang DH, Kim SW, Kim SW, Kim YJ, Chung CK, Shin JJ, Yi S, Lee JK, Lee JH, Lee CH, Lee HJ, Chun HJ, Cho DC, Cho YE, Jin YJ, Choi KC, Han IH, Hyun SJ, Hur JW, Kim KJ. Epidemiology of C5 Palsy after Cervical Spine Surgery: A 21-Center Study. Neurospine 2019; 16:558-562. [PMID: 31607088 PMCID: PMC6790722 DOI: 10.14245/ns.1938142.071] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 07/19/2019] [Indexed: 11/30/2022] Open
Abstract
Objective C5 palsy is a severe complication after cervical spine surgery, the pathophysiology of which remains unclear. This multicenter study investigated the incidence of C5 palsy following cervical spine surgery in Korea.
Methods We conducted a retrospective multicenter study involving 21 centers from the Korean Cervical Spine Study Group. The inclusion criteria were cervical spine surgery patients between 2012 and 2016, excluding cases of neck surgery. In patients with C5 palsy, the operative methods, disease category, onset time of C5 palsy, recovery time, C5 manual muscle testing (MMT) grade, and post-C5 palsy management were analyzed.
Results We collected 15,097 cervical spine surgery cases from 21 centers. C5 palsy occurred in 88 cases (0.58%). C5 palsy was more common in male patients (p=0.019) and after posterior approach procedures (p<0.001). C5 palsy usually occurred within 3 days after surgery (77 of 88, 87.5%) and most C5 palsy patients recovered within 6 months (51 of 88, 57.95%). Thirty C5 palsy patients (34.09%) had motor weakness, with an MMT grade≤2. Only four C5 palsy patients (4.5%) did not recover during follow-up. Posterior cervical foraminotomy was performed in 7 cases (7.95%), and steroids were used in 56 cases (63.63%). Twenty-six cases (29.55%) underwent close observation only.
Conclusion The overall incidence of C5 palsy was relatively low (0.58%). C5 palsy was more common after posterior cervical surgery and in male patients. C5 palsy usually developed within 3 days after surgery, and more than half of patients with C5 palsy recovered within 6 months.
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Affiliation(s)
- Jae Keun Oh
- Department of Neurosurgery, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Jae Taek Hong
- Department of Neurosurgery, St. Vincent's Hospital, The Catholic University of Korea, Suwon, Korea
| | - Dong Ho Kang
- Department of Neurosurgery, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Sang-Woo Kim
- Department of Neurosurgery, Yeungnam University Medical Center, Daegu, Korea
| | - Seok Won Kim
- Department of Neurosurgery, Chosun University Hospital, Gwangju, Korea
| | - Young Jin Kim
- Department of Neurosurgery, Dankook University Hospital, Cheonan, Korea
| | - Chun Kee Chung
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Jun Jae Shin
- Department of Neurosurgery, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Seong Yi
- Department of Neurosurgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Jung Kil Lee
- Department of Neurosurgery, Chonnam University Hospital, Chonnam University College of Medicine, Gwangju, Korea
| | - Jun Ho Lee
- Department of Neurosurgery, Kyung Hee University Medical Center, Kyung Hee University College of Medicine, Seoul, Korea
| | - Chang-Hyun Lee
- Department of Neurosurgery, Inje University Ilsan Paik Hospital, Goyang, Korea
| | - Ho Jin Lee
- Department of Neurosurgery, Incheon St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Hyoung-Joon Chun
- Department of Neurosurgery, Hanyang University Seoul Hospital, Seoul, Korea
| | - Dae-Chul Cho
- Department of Neurosurgery, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Yong Eun Cho
- Department of Neurosurgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Yong Jun Jin
- Department of Neurosurgery, Inje University Seoul Paik Hospital, Seoul, Korea
| | - Kyung-Chul Choi
- Department of Neurosurgery, The Leon Wiltse Memorial Hospital, Anyang, Korea
| | - In Ho Han
- Department of Neurosurgery, Pusan National University Hospital, Busan, Korea
| | - Seung-Jae Hyun
- Department of Neurosurgery, Spine Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Jung-Woo Hur
- Department of Neurosurgery, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Ki-Jeong Kim
- Department of Neurosurgery, Spine Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
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Lee CH, Hong JT, Kang DH, Kim KJ, Kim SW, Kim SW, Kim YJ, Chung CK, Shin JJ, Oh JK, Yi S, Lee JK, Lee JH, Lee HJ, Chun HJ, Cho DC, Jin YJ, Choi KC, Han IH, Hyun SJ, Hur JW, Song GS. Epidemiology of Iatrogenic Vertebral Artery Injury in Cervical Spine Surgery: 21 Multicenter Studies. World Neurosurg 2019; 126:e1050-e1054. [DOI: 10.1016/j.wneu.2019.03.042] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/04/2019] [Accepted: 03/05/2019] [Indexed: 11/26/2022]
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21
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Xia BW, Jin YJ, Zhao JZ, Chen ZJ, Zheng BB, Zhao YJ, Wang R, Xu H. Robust Twin Pairs of Weyl Fermions in Ferromagnetic Oxides. Phys Rev Lett 2019; 122:057205. [PMID: 30822035 DOI: 10.1103/physrevlett.122.057205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Indexed: 05/05/2023]
Abstract
The ferromagnetic Weyl semimetals with inversion symmetry usually possess odd pairs of Weyl fermions. Here, we present an inversion eigenvalue argument to dictate the existence of even pairs of ferromagnetic Weyl fermions. We show, by a combination of first-principles calculations and symmetry analyses, that this exotic topological feature can be verified in ferromagnetic oxides in different space groups. In particular, a realistic candidate, i.e., hollandite RbCr_{4}O_{8} with a high Curie temperature (∼295 K), hosts intriguing twin pairs of Weyl fermions, which are robustly stable against perturbations. Moreover, our effective model and symmetry analysis show that the twin pairs of Weyl fermions originate from a mirrored nodal ring pair. The nontrivial surface states and Fermi arcs of RbCr_{4}O_{8} are clearly visible, further revealing the topological features. This work strengthens the understanding of the parity analysis in exploring ferromagnetic topological materials with unconventional fermionic excitations.
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Affiliation(s)
- B W Xia
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Y J Jin
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - J Z Zhao
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Z J Chen
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - B B Zheng
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Y J Zhao
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - R Wang
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Institute for Structure and Function & Department of physics, Chongqing University, Chongqing 400044, People's Republic of China
| | - H Xu
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
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Sun Q, Huang Y, Zhao SJ, Zhang L, Tang W, Jin YJ, Wu N. [The volume and mass growth of persisted pulmonary nodules detected in low-dose CT screening and its influence factors]. Zhonghua Zhong Liu Za Zhi 2018; 40:274-279. [PMID: 29730914 DOI: 10.3760/cma.j.issn.0253-3766.2018.04.007] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the changes of volume and mass of pulmonary nodules which were detected in low-dose computed tomography (LDCT) screening, and to analyze the influencing factors. Methods: This retrospective study analyzed the CT images of the participants who underwent at least two chest LDCT scanning from March 2009 to December 2015 in National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College. The inclusion criteria was the nodule diameter ≥6 mm; the volume growth was defined as ≥20%. Fifty-one pulmonary nodules (PNs) were selected among 51 enrolled participants (26 men and 25 women). According to characteristic of nodule and risk stratification of participant, the nodules were classified into different groups (10 non-solid nodules, 17 part-solid nodules and 24 solid nodules; 14 PNs in high-risk group, 12 PNs in moderate-risk group and 25 PNs in low-risk group). The Lung-VCAR software was used to measure the diameter and volume of the PNs, and all nodules were calculated for the volume doubling time (VDT) and mass doubling time (MDT). Results: Among the 51 PNs, the diameter of 33 nodules increased more than 1.5 mm while 18 nodules increased less than 1.5 mm. The median VDT of part-solid nodules was 364 days, which was shorter than that of non-solid nodules and solid nodules (761 and 819 days, respectively), the differences were statistically significant (both P<0.05). The median MDT of part-solid nodules was 351 days, which was lower than that of non-solid nodules and solid nodules (772 days and 840 days, respectively). The difference was statistically significant (P<0.05). The median VDT and MDT of the pulmonary nodules in the high-risk group were 181 days and 256 days, respectively, which were lower than those in the low risk group (1 037 days and 1 035 days, respectively). VDT has good correlation with MDT (r=0.909, P<0.001). Conclusions: Both the characteristic of PNs and the risk status of the participants could affect the growth of nodules in LDCT screening. The part-solid nodules and high-risk group nodules grew relatively faster, which should be closely focused on. Compared with the two-dimensional diameter, the three-dimensional quantitative indicators (VDT and MDT) were more sensitive for nodule growth. The mass changes of part-solid nodules were earlier than that of volume.
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Affiliation(s)
- Q Sun
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y Huang
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - S J Zhao
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - L Zhang
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - W Tang
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y J Jin
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - N Wu
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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Chen JB, Zhang J, Hu HZ, Xue M, Jin YJ. Polymorphisms of TGFB1, TLE4 and MUC22 are associated with childhood asthma in Chinese population. Allergol Immunopathol (Madr) 2017; 45:432-438. [PMID: 28262390 DOI: 10.1016/j.aller.2016.10.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 10/31/2016] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To investigate whether the genetic variants of TGFB1, TLE4, MUC22 and IKZF3 are associated with the development of asthma in Chinese children. METHODS 572 adolescent asthma patients and 590 age-matched healthy controls were included in this study. A total of four SNPs were genotyped, including rs2241715 of TGFB1, rs2378383 of TLE4, rs2523924 of MUC22, and rs907092 of IKZF3. Allele frequencies of the patients and the control group were compared by the Chi-square test. The Student t test was used to analyse the relationship between genotypes and clinical feature of the patients. RESULTS Patients were found to have significantly different frequencies of allele A of rs2241715, allele G of rs2378383 and allele A of rs2523924 as compared with the controls (40.4% vs. 45.9%, p=0.01 for rs2241715; 17.2% vs. 13.4%, p=0.01 for rs2378383; 15.3% vs. 11.9%, p=0.02 for rs2523924). For patients with severe asthma, those with genotype AA/AG of rs2241715 had remarkably higher FEV1% as compared with those with genotype GG (59.1±4.3% vs. 55.4±3.7%, p<0.001). Moreover, those with genotype GG/GA of rs2378383 had remarkably lower FEV1% as compared with those with genotype AA (54.6±2.9% vs. 58.6±4.1%, p<0.001). CONCLUSIONS Genes TGFB1, TLE4 and MUC22 are associated with the risk of childhood asthma in Chinese population. Our results associating TGFB1 and TLE4 with clinical features of asthma suggest potential application of these parameters in the management of asthma children.
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Affiliation(s)
- J B Chen
- Department of Paediatrics, Jiangsu Taizhou People's Hospital, Taizhou, China
| | - J Zhang
- Department of Gastroenterology, Jiangsu Taizhou People's Hospital, Taizhou, China
| | - H Z Hu
- Department of Paediatrics, Jiangsu Taizhou People's Hospital, Taizhou, China
| | - M Xue
- Department of Paediatrics, Jiangsu Taizhou People's Hospital, Taizhou, China
| | - Y J Jin
- Department of Paediatrics, Jiangsu Taizhou People's Hospital, Taizhou, China.
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Hur EY, Jin YJ, Jin TX, Lee SM. Development and evaluation of the automated risk assessment system for multidrug-resistant organisms (autoRAS-MDRO). J Hosp Infect 2017; 98:202-211. [PMID: 28807836 DOI: 10.1016/j.jhin.2017.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 08/06/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND A high proportion of infections acquired in hospitals are caused by multidrug-resistant organisms (MDROs). The priority in MDRO prevention is to detect high-risk patients and implement preventive intervention as soon as possible. AIM To develop an automated risk assessment system for MDROs (autoRAS-MDRO) to screen for patients at MDRO infection risk and evaluate the predictive validity of the autoRAS-MDRO. METHODS Data for 4200 variables were extracted from the electronic health records (EHRs) for constructing the MDRO risk-scoring algorithm, which was based on a logistic regression model. The autoRAS-MDRO was designed such that the MDRO risk classification (high, moderate, low risk) could be automatically displayed on the nursing Kardex screen in the EHRs system. For the development of the MDRO risk-scoring algorithm, 1000 patients with MDROs and 4000 patients without MDROs were selected; similarly, for the evaluation, 2173 and 8692 patients with and without MDROs, respectively, were selected. FINDINGS The predictive validity of the autoRAS-MDRO was as follows: (i) at the 6-month evaluation: sensitivity, 81%; specificity, 79%; positive predictive value (PPV), 49%; negative predictive value (NPV), 94%; and Youden index, 0.60; (ii) at the 12-month evaluation: sensitivity 79%, specificity 78%, PPV 47%, NPV 94%, and Youden index, 0.57. CONCLUSION The autoRAS-MDRO had moderate predictive validity. It could be useful in redirecting nurses' time and efforts required for MDRO risk assessment and implementation of infection control measures, and in reducing the incidence of MDRO infection in hospitals, thereby contributing to patient safety.
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Affiliation(s)
- E Y Hur
- College of Nursing, The Catholic University of Korea, Seoul, South Korea
| | - Y J Jin
- College of Nursing, The Catholic University of Korea, Seoul, South Korea
| | - T X Jin
- College of Nursing, The Catholic University of Korea, Seoul, South Korea
| | - S M Lee
- College of Nursing, The Catholic University of Korea, Seoul, South Korea.
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25
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Jin YJ, Sun L, Yang L, Xing R, Liu XY. [Significance of v-raf murine sarcoma viral oncogene homologue B1 in rheumatoid arthritis]. Beijing Da Xue Xue Bao Yi Xue Ban 2016; 48:947-950. [PMID: 27987495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To detect serum v-raf murine sarcoma viral oncogene homologue B1 (BRAF) protein levels and to investigate their clinical significance in rheumatoid arthritis (RA) patients. METHODS Serum samples were obtained from 78 RA patients, 32 osteoarthritis (OA) patients, 16 systemic lupus erythematosus (SLE) patients, 16 gout patients, 16 ankylosing spondylitis (AS) patients, 16 Sjogren syndrome (SS) patients and 30 healthy controls. BRAF protein in the sera was examined by enzyme-linked immunosorbent assay (ELISA). The associations between BRAF levels and the clinical features including age, sex, disease duration, swelling joints, tenderness joints, duration of moning stiffness, joint deformity, visual assessment scale (VAS) and extra articular manifestations and laboratory parameters including erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), rheumatoid factor (RF), disease activity score in 28 joints (DAS28), anti-cyclic citrullinated peptide (CCP) antibody, antikeratin antibody, antnuclear antibody (ANA), immunoglobulin and cytokines, such as TNF-α, IL-1β, IL-6 and IL-17A in RA patients were evaluated. Data analyses were performed by using SPSS 19.0 program. RESULTS The serum BRAF protein levels in the RA patients were significantly higher than those of other rheumatic diseases groups including OA, SLE, AS, SS, gout patients and healthy controls, the P value was 0.002, <0.001, <0.001, <0.001, 0.001 and <0.001 respectively. The level of serum BRAF protein in the RA patients showed a positive correlation with the rheumatoid factor (P=0.009) and IgA levels (P=0.006), but no correlation with clinical features, such as age and duration or other laboratory parameters, including CRP, ESR, anti-CCP antibody, IgM, IgG, TNF-α, IL-1β, IL-6 and IL-17A. The RA patients were further divided into normal levels of BRAF protein group and elevated levels of BRAF protein group. Compared with the clinical features and laboratory indexes of normal and elevated levels of BRAF protein groups in the RA patients, there was no significant difference between the two groups in age, duration, DAS28, CRP, ESR, RF, anti-CCP, IgA, IgG, IgM, TNF-α or IL-6. CONCLUSION The elevated level of BRAF protein in the RA patients showed that BRAF might play a role in the pathogenesis of RA. Further researches on BRAF gene expression may help to clarify the role of BRAF in RA.
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Affiliation(s)
- Y J Jin
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - L Sun
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - L Yang
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - R Xing
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - X Y Liu
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
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Jin YJ, Cao PJ, Bian WH, Li ME, Zhou R, Zhang LY, Yang MZ. BDNF levels in adipose tissue and hypothalamus were reduced in mice with MSG-induced obesity. Nutr Neurosci 2015; 18:376-82. [DOI: 10.1179/1476830515y.0000000039] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Abstract
Heterotopic ossification is one of the possible complications following cervical total disk replacement. Although there are numerous hypotheses regarding the etiology of heterotopic ossification, the main causes of heterotopic ossification remain unknown. In this study, we hypothesize that heterotopic ossification formation is related to external loading in the cervical vertebrae after total disk replacement. A two-dimensional finite element model of a cervical vertebra treated by total disk replacement in the sagittal plane was developed. The bone adaptation process of heterotopic ossification was simulated based on strain energy density under both compressive and shear forces. Different types of heterotopic ossification formation were analyzed according to the directions of forces. Two distinct types of heterotopic ossification following cervical total disk replacement were predicted, which was consistent with previous clinical studies. Type 1 heterotopic ossification was observed in the posterior upper part of the vertebra under compressive forces, while type 2 heterotopic ossification was detected mostly in the anterior upper part under shear forces. In addition, heterotopic ossification formation enhanced the strain energy distribution, which is known to be related to bone remodeling. This article presents the effects of different mechanical loading conditions on the occurrence of heterotopic ossification following cervical total disk replacement, and the results may be useful for the design of artificial disks that minimize heterotopic ossification.
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Affiliation(s)
- Danaa Ganbat
- Department of Mechanical Engineering, Kyung Hee University, Yongin, Korea
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Jin YJ, Park SB, Kim MJ, Kim KJ, Kim HJ. An analysis of heterotopic ossification in cervical disc arthroplasty: a novel morphologic classification of an ossified mass. Spine J 2013; 13:408-20. [PMID: 23332520 DOI: 10.1016/j.spinee.2012.11.048] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Revised: 07/10/2012] [Accepted: 11/17/2012] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Although the precise cause of heterotopic ossification (HO) remains unclear, it is certain that it increases with time. The reason why the reported occurrence rate has been given as a wider range is that there were no clinical reports that have addressed the occurrence rate based on the morphology and position. PURPOSE The aim of this retrospective study was to determine whether radiological parameters had an influence on the formation of HO and to compare the results after cervical arthroplasty using Bryan (Medtronic Sofamor Danek, Memphis, TN, USA), PCM (Cervitech, Rockaway, NJ, USA), and Prestige LP (Medtronic Sofamor Danek) implants. STUDY DESIGN/SETTING A retrospective study. PATIENT SAMPLE Eighty-one patients were included. OUTCOME MEASUREMENT The occurrence of HO was determined at the four corners of the disc space according to the McAfee classification system. Heterotopic ossifications were classified into Type 1, Type 2, and Type 3 HOs (end plate, traction spur, and teardrop types) based on their morphologic features. The presence of preoperative ossifications, sex, type of device, operated level, hybrid implantation, depth behind the prosthesis, cervical lordotic angle, and segmental angle between the footplates of the prosthesis were assessed as predictors in terms of location and morphologic features. METHODS Eighty-one patients after 95 cervical arthroplasties using the Bryan (35 segments), PCM (30 segments), and Prestige LP implants (30 segments) underwent postoperative radiographs or three-dimensional computed tomography with a mean follow-up period of 46, 39, and 30 months, respectively, after the operation. RESULTS The overall incidence of all cases and one-level subgroup were 64.2% and 60.3%, respectively. According to the types of device, the incidence of HO was 49% (Bryan), 80% (PCM), and 60% (Prestige). Type 1 HO (62.1%) was found only in the posterosuperior disc space. Type 2 HO (13.7%) was primarily detected in the anterosuperior disc space rather than the posterosuperior disc space (3.2%). Type 3 HO (4.2%) developed only in the anterior disc space. In the anterior disc space, the incidence of Type 2 and Type 3 HOs was highest in the PCM group. In the posterior disc space, the Bryan group showed a lower proportion in the high McAfee class than the other device groups. The occurrence of Type 1 HO in the posterosuperior disc space was significantly related with the presence of preoperative ossification (p=.030), ossification in the ligamentum nuchae (p=.027), male sex (p=.042), and PCM device (p=.012). A well-fitting (p<.002) and less lordotic segmental angle (p<.015) were correlated with Type 1 HO. Implantation in the upper cervical level (p=.016) and hybrid implantation with cage (p=.033) or artificial disc (p=.048) on the upper adjacent level were significant risk factors for anterior Type 2 HO. Cervical lordotic angle at 1 month after surgery had a significant connection with the occurrence of anterior Type 2 HO in both groups of all cases (p=.032) and one-level subgroup (p=.000). CONCLUSIONS Type 1 HO developed mostly in the posterior disc space. Type 2 HO was the dominant type in the anterior disc space. Type 3 HO developed only in the anterior disc space. It is certain that both Type 1 and Type 2 HOs are related to biomechanical stresses (compressive force for Type 1 HO and traction force for Type 2 HO). It is suggested that a cervical arthroplasty should be selected in terms of the implant level, hybrid conditions on the upper adjacent segment, disc design vulnerable to the pseudotranslation, the presence of preoperative ossification, and fitting implants to end plates to reduce the development of HO.
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Affiliation(s)
- Yong Jun Jin
- Department of Neurosurgery, Inje University College of Medicine, Seoul Paik Hospital, Seoul, Korea
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Jin YJ, Kim YE, Seo JH, Choi HW, Jahng TA. Effects of rod stiffness and fusion mass on the adjacent segments after floating mono-segmental fusion: a study using finite element analysis. Eur Spine J 2012; 22:1066-77. [PMID: 23242620 DOI: 10.1007/s00586-012-2611-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 11/26/2012] [Accepted: 12/04/2012] [Indexed: 10/27/2022]
Abstract
PURPOSE The aims of the present study were to compare the biomechanical effects on the adjacent segments after mono-segmental floating fusion with posterior semi-rigid or rigid stabilization, and to evaluate the effect of the amount of fusion mass on the biomechanical differences. METHODS A detailed, nonlinear L1-S1 finite element model had been developed and validated. Then five models were reconstructed by different fixation techniques on the L3-L4 level: rigid fixation with an interbody spacer (Ti + IS), rigid fixation with a large interbody spacer (Ti + IS_all), semi-rigid fixation with an interbody spacer (PEEK + IS), semi-rigid fixation with a large interbody spacer (PEEK + IS_all), and semi-rigid fixation only (PEEK). Analyses were conducted for the case of erect standing position, flexion, and extension motion. RESULTS At L1-L2 and L2-L3, PEEK + IS demonstrated less inter-segmental rotation and nucleus pressure increments from the intact model compared with Ti + IS. The L4-L5 and L5-S1 levels showed slightly higher values with PEEK + IS, but these differences among the instrumented models were not significant. The motion difference based on the fusion mass at the adjacent levels was at most 3%. All instrumentation cases generated a 55% higher facet contact force at the lower adjacent level (L4-L5) compared to that of the intact model during 26° extension and the largest increment was detected at the upper adjacent level (L2-L3) in the Ti + IS. Instrumentation with Ti + IS markedly increased the stress in the intervertebral disk at the upper adjacent level, while the stress with PEEK + IS appeared largest at the lower adjacent level. CONCLUSIONS Posterior instrumentation with semi-rigid rods may lower the incidence of disk and facet degeneration in the upper adjacent segment compared to rigid rods. On the other hand, the possibility of facet degeneration will be similar for all instrumentation devices in the lower adjacent segment in the long-term. The stiffness difference between rigid and semi-rigid rods on the changes in the adjacent motion segments was more crucial than amount of fusion mass.
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Affiliation(s)
- Yong Jun Jin
- Department of Neurosurgery, Inje University College of Medicine, Seoul Paik Hospital, Seoul, Korea
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Sohn S, Jin YJ, Kim KJ, Kim HJ. Long-term Sequela of Intradural Extramedullary Tuberculoma in the Thoracic Dorsal Spinal Cord: Case Report and Review of the Literature. Korean J Spine 2011; 8:295-9. [PMID: 26064149 PMCID: PMC4461743 DOI: 10.14245/kjs.2011.8.4.295] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Revised: 12/18/2011] [Accepted: 01/06/2012] [Indexed: 11/19/2022]
Abstract
A 45-year old man, who had tuberculosis five years ago presented with paresthesia, decreased proprioception, and gait disturbance in the lower extremity which were aggravated for a month. Magnetic resonance imaging revealed the T3-7 intradural extramedullary fibrotic mass with dark signal intensity on T2-weighted images. The yellowish material in the thick fibrous mass was confirmed as caseous necrosis. Two days after the operation, the symptoms improved. Although quite rare, intradural extramedullary tuberculoma should be considered as a chronic sequel of the previous medical history of pulmonary tuberculosis or tuberculous meningitis.
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Affiliation(s)
- Seil Sohn
- Department of Neurosurgery, Seoul National University College of Medicine, Bundang Hospital, Seongnam-si, Korea
| | - Yong Jun Jin
- Department of Neurosurgery, Seoul Paik Hospital, Inje University, Seoul, Korea
| | - Ki-Jeong Kim
- Department of Neurosurgery, Seoul National University College of Medicine, Bundang Hospital, Seongnam-si, Korea
| | - Hyun-Jib Kim
- Department of Neurosurgery, Seoul National University College of Medicine, Bundang Hospital, Seongnam-si, Korea
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Jin YJ, Chung SB, Kim KJ, Kim HJ. Dystrophic calcification in the epidural and extraforaminal space caused by repetitive triamcinolone acetonide injections. J Korean Neurosurg Soc 2011; 50:134-8. [PMID: 22053235 DOI: 10.3340/jkns.2011.50.2.134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Revised: 01/11/2011] [Accepted: 08/08/2011] [Indexed: 11/27/2022] Open
Abstract
The authors report a case of epidural and extraforaminal calcification caused by repetitive triamcinolone acetonide injections. A 66-year-old woman was admitted presenting with lower extremity weakness and radiating pain in her left leg. Ten months before admission, the patient was diagnosed as having an L4-5 spinal stenosis and underwent anterior lumbar interbody fusion followed by posterior fixation. Her symptoms had been sustained and she did not respond to transforaminal steroid injections. Repetitive injections (10 times) had been performed on the L4-5 level for six months. She had been taking bisphosphonate as an antiresorptive agent for ten months after surgery. Calcification in the ventral epidural and extraforaminal space was detected. The gritty particles were removed during decompressive surgery and these were proven to be a dystrophic calcification. The patient recovered from weakness and radiating leg pain. Repetitive triamcinolone acetonide injections after discectomy may be the cause of dystrophic calcification not only in the degenerated residual disc, but also in the posterior longitudinal ligament. Possible mechanisms may include the toxicity of preservatives and the insolubility of triamcinolone acetonide. We should consider that repetitive triamcinolone injections in the postdisectomy state may cause intraspinal ossification and calcification.
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Affiliation(s)
- Yong Jun Jin
- Department of Neurosurgery, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
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Jin YJ, Chung SB, Kim KJ, Kim HJ. Spinal intradural extramedullary cavernoma presenting with intracranial superficial hemosiderosis. J Korean Neurosurg Soc 2011; 49:377-80. [PMID: 21887400 DOI: 10.3340/jkns.2011.49.6.377] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 12/09/2010] [Accepted: 05/30/2011] [Indexed: 11/27/2022] Open
Abstract
A case of intradural extramedullary cavernous angioma is presented with headache, dizziness, and bilateral sensorineural hearing loss caused by an intracranial superficial hemosiderosis. It was incidentally found in a patient with a 3-month history of sustained headache, dizziness and a 3-year history of hearing difficulty. The neurological examination was unremarkable in the lower extremity. MR images showed an intracranial superficial hemosiderosis mostly in the cerebellar region. Myelography and MR images of the thoracolumbar spine revealed an intradural extramedullary mass, which was pathologically proven to be a cavernous angioma. T12 total laminoplastic laminotomy and total tumor removal were performed without any neurologic deficits. The patient's symptoms, including headache and dizziness, have been absent for three years. Intradural extramedullary cavernous angioma can present with an intracranial superficial hemosiderosis as a result of chronic subarachnoid hemorrhage.
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Affiliation(s)
- Yong Jun Jin
- Department of Neurosurgery, Inje University Seoul Paik Hospital, Seoul, Korea
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Yoon SH, Kim WH, Chung SB, Jin YJ, Park KW, Lee JW, Chung SK, Kim KJ, Yeom JS, Jahng TA, Chung CK, Kang HS, Kim HJ. Clinical analysis of thoracic ossified ligamentum flavum without ventral compressive lesion. Eur Spine J 2010; 20:216-23. [PMID: 20628768 DOI: 10.1007/s00586-010-1515-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2009] [Revised: 05/19/2010] [Accepted: 07/01/2010] [Indexed: 11/27/2022]
Abstract
The aim of this study was to analyze the clinical characteristics of thoracic ossified ligamentum flavum (OLF) and to elucidate prognostic factors as well as effective surgical treatment modality. The authors analyzed 106 thoracic OLF cases retrospectively from January 1999 to December 2008. The operative (n = 40) and the non-operative group (n = 66) were diagnosed by magnetic resonance imaging (MRI) and/or computed tomography (CT) imaging. We excluded cases exhibiting ventral compressive lesions causing subarachnoid space effacement in thoracic vertebrae as well as those with a coexisting cervical compressive myelopathy. Those in the operative group were treated with decompressive laminectomy as well as resection of OLF. The preoperative neurologic status and postoperative outcomes of patients, as indicated by their modified Japanese Orthopedic Association (mJOA) scores and recovery rate (RR), Modic changes, the axial (fused or non-fused) and sagittal (omega or beak) configurations of OLF, and the ratios of the cross-sectional area (CSA) and anteroposterior diameter (APD) of the most compressed level were studied. The most commonly affected segment was the T10-11 vertebral body level (n = 49, 27.1%) and the least affected segment was the T7-8 level (n = 1, 0.6%). The ratios of the CSA in non-fused and fused types were 77.3 and 59.3% (p < 0.001). When Modic changes were present with OLF, initial mJOA score was found to be significantly lower than those without Modic change (7.62 vs. 9.09, p = 0.033). Neurological status improved after decompressive laminectomy without fusion (preoperative vs. last mJOA; 7.1 ± 2.01 vs. 8.57 ± 1.91, p < 0.001). However, one patient exhibited transient deterioration of her neurological status after surgery. In the axial configuration, fused-type OLF revealed a significant risk for a decreased postoperative mJOA score (0-7, severe and moderate) (Odds ratio: 5.54, χ (2) = 4.41, p = 0.036, 95% CI: 1.014-30.256). The results indicated that the new categorization of axial-type of OLF is a helpful predictor of postoperative patient outcome and fused type was related with poor prognosis. In OLF cases free from ventral lesions compressing the spinal cord, decompressive laminectomy is enough for successful surgical outcome. Therefore, early surgical treatment will be considered in cases with fused-type OLF compressing spinal cord even though they do not have myelopathic symptoms.
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Affiliation(s)
- Sang Hoon Yoon
- Department of Neurosurgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam-si, Gyeonggi-do, South Korea
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Yoon SH, Kim KJ, Chung SK, Kim HJ, Choe G, Chung SB, Jin YJ. Inflammatory myofibroblastic tumor in the intradural extramedullary space of the lumbar spine with spondylolisthesis: case report and review of the literature. Eur Spine J 2010; 19 Suppl 2:S153-7. [PMID: 19941012 PMCID: PMC2899620 DOI: 10.1007/s00586-009-1212-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2009] [Revised: 07/23/2009] [Accepted: 11/03/2009] [Indexed: 10/20/2022]
Abstract
An inflammatory myofibroblastic tumor (IMT) is a rare disease entity reported to arise in various organs but still thought to be a neoplastic or reactive inflammatory condition controversially. The author reports an extremely rare case of intradural extramedullary IMT of lumbar spine which was presenting radiculopathy and neurogenic intermittent claudication due to concomitant spondylolisthesis.
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Affiliation(s)
- Sang Hoon Yoon
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Seoul, Gyeonggi-do 463-707 Korea
| | - Ki-Jeong Kim
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Seoul, Gyeonggi-do 463-707 Korea
| | - Sang Ki Chung
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Seoul, Gyeonggi-do 463-707 Korea
| | - Hyun-Jib Kim
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Seoul, Gyeonggi-do 463-707 Korea
| | - Gheeyoung Choe
- Department of Pathology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seoul, Gyeonggi-do Korea
| | - Sang Bong Chung
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Seoul, Gyeonggi-do 463-707 Korea
| | - Yong Jun Jin
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Seoul, Gyeonggi-do 463-707 Korea
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Yoon SH, Chung SK, Kim KJ, Kim HJ, Jin YJ, Kim HB. Pyogenic vertebral osteomyelitis: identification of microorganism and laboratory markers used to predict clinical outcome. Eur Spine J 2010; 19:575-82. [PMID: 19937064 PMCID: PMC2899831 DOI: 10.1007/s00586-009-1216-1] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Revised: 10/10/2009] [Accepted: 11/05/2009] [Indexed: 12/19/2022]
Abstract
The aim of this study is to determine the predictive values of laboratory indicators of pyogenic vertebral osteomyelitis (PVO) and a potential cure if the microorganism cannot be identified. Forty-five consecutive patients with PVO were enrolled. Antibiotic therapy with or without surgery was performed according to microorganism. In the negative-culture (NC) group, cefazolin was administered in cases of hematogenous PVO, and vancomycin was administered in cases of postoperative or procedure-related PVO. The clinical, laboratory, and radiological findings were followed up with regard to an appropriate response to antimicrobial therapy. Nine patients were treated with antibiotics alone. We were able to identify the microorganism in 34 cases (75.6%). Ten cases in NC group were cured without recurrence, but one was not. Identification of the microorganisms did not have any significant influence on the treatment outcome, duration of antibiotic administration or normalization of laboratory profiles. For erythrocyte sedimentation rate (ESR) values over 55 mm/h and C-reactive protein (CRP) values of 2.75 mg/dL at fourth week after antibiotic administration by means of ROC curve analysis, we expect significantly high rates of treatment failure by Pearson chi(2) test (chi(2) = 4.344, Odds ratio = 5.15, p = 0.037, 95% CI 1.004-26.597). Even in patients with negative culture findings, it is expected that a good outcome will be achieved by the administration of cefazolin or vancomycin for about 6 weeks. It is concluded that antibiotics selected according to the etiological setting can be initiated without the need to start empirical antibiotics. In every instance at fourth week after the initiation of antibiotic therapy, the values of CRP and ESR can provide meaningful information regarding whether clinicians need to reevaluate the effectiveness of antibiotics by performing follow-up imaging studies and monitoring the patient's clinical manifestations.
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Affiliation(s)
- Sang Hoon Yoon
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707 Korea
| | - Sang Ki Chung
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707 Korea
| | - Ki-Jeong Kim
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707 Korea
| | - Hyun-Jib Kim
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707 Korea
| | - Yong Jun Jin
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707 Korea
| | - Hong Bin Kim
- Division of Infectious Diseases, Department of Internal Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam-si, Korea
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Abstract
A 68-year-old woman presenting with progressive paraparesis was diagnosed with an AVF involving a previously fractured L1 vertebral body on which feeders from multiple segmental arteries converged. The most distinctive feature in our patient was that the fistula was located in the vertebral body. Transarterial embolization of the segmental arteries with coils and glue resulted in total obliteration of the fistula, which in turn resulted in symptom improvement.
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Affiliation(s)
- Y J Jin
- Department of Neurosurgery, Seoul National University College of Medicine, South Korea
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Abstract
OBJECTIVE Although a dural or intramedullary arteriovenous fistula involving the conus medullaris and fed by the lateral sacral artery has been reported, a case of perimedullary fistula arising from an artery in the filum terminale has not been described in the literature. The authors report the first case of perimedullary arteriovenous fistula located in the filum terminale. CLINICAL PRESENTATION A 61-year-old man presented with a 10-year history of leg pain. Thoracolumbar magnetic resonance imaging scans revealed multiple perimedullary signal voids from T10 to L3. Angiography showed engorged perimedullary veins and a fistula fed by the anterior spinal artery from the right ninth segmental artery and by 2 branches of the left lateral sacral artery. The anterior spinal artery was also regarded as the artery of the filum terminale. INTERVENTION Transarterial embolization was performed to occlude the feeders from the left lateral sacral artery, and an L5 total laminectomy was subsequently performed to obliterate residual fistulous material from the artery of the filum terminale. The thickened, yellowish filum, surrounded by tortuous, engorged veins, was coagulated and resected. Postoperatively, the patient's symptoms gradually resolved and were not aggravated during long periods of walking. CONCLUSION It must be noted that a fistula can be located in the filum terminale and can be successfully treated using multidisciplinary approaches.
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Affiliation(s)
- Yong Jun Jin
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul, South Korea
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Abstract
E2F-1 controls multiple cellular activities through transcriptional regulation of its target genes. As a mediator of cell death, E2F-1 can eliminate latent neoplastic cells through apoptosis. However, the mechanism by which E2F-1 mediates cancer cell killing is largely unknown. In this paper, we report that phosphatase of activated cells 1 (PAC1) phosphatase is a direct transcription target of E2F-1 in signaling apoptosis. We show that ectopic E2F-1 increases expression of PAC1 at both transcriptional and translational levels in breast cancer cells. E2F-1 physically interacts with the promoter of PAC1, binds to its consensus sequence in the promoter and transactivates the PAC1 promoter. E2F-1 suppresses extracellular signal-regulated kinase (ERK) phosphorylation through PAC1 and causes cancer cell death by apoptosis following treatment with a chemotherapeutic agent N-4-hydroxyphenylretinamide (4-HPR). Furthermore, ectopic PAC1 inhibits ERK phosphorylation and mediates cell killing. Moreover, endogenous E2F-1 upregulates PAC1 and suppresses ERK activity, leading to cell death in response to 4-HPR. These results reveal a crucial role of PAC1 in E2F-1-directed apoptosis. Our study demonstrates that E2F-1 mediates apoptosis through transcriptional regulation of PAC1 and subsequent suppression of the ERK signaling. Our findings establish a functional link between E2F-1 and mitogen-activated protein kinases. The E2F-1-PAC1 cascade in cancer cell killing may provide a molecular basis for cancer therapeutic intervention.
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Affiliation(s)
- J Wu
- Department of Radiation Oncology, Center for Radiological Research, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
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39
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Abstract
Paragangliomas of the cauda equina are rare neuroendocrine tumors. Four cases of nonsecreting paraganglioma of the cauda equina, preoperatively misdiagnosed as neurinoma, are presented with an emphasis on the correlation between magnetic resonance imaging findings and pathological features. Although it is difficult to correctly diagnose paraganglioma preoperatively for intradural extramedullary tumors, especially in the cauda equina, paraganglioma should be included in differential diagnoses.
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Affiliation(s)
- Seung-Yeob Yang
- Department of Neurosurgery, Seoul National University College of Medicine, 28 Yeongeon-dong, Seoul, Jongno-gu, Korea
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Masaki T, Igarashi K, Tokuda M, Yukimasa S, Han F, Jin YJ, Li JQ, Yoneyama H, Uchida N, Fujita J, Yoshiji H, Watanabe S, Kurokohchi K, Kuriyama S. pp60c-src activation in lung adenocarcinoma. Eur J Cancer 2003; 39:1447-55. [PMID: 12826049 DOI: 10.1016/s0959-8049(03)00276-4] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Nine src family members are known including c-Src, c-Yes, c-Lck, c-Fyn, c-Hck, c-Lyn, c-Blk, c-Fgr and c-Yrk. They encode proteins with molecular weights of 55-62 kilodaltons (kDa), which are either cytoplasmic or membrane-associated protein tyrosine kinases. A close correlation exists between an elevated pp60c-src tyrosine kinase activity and cell transformation. However, the level of activation of pp60c-src in non-small cell lung cancers (NSCLC) remains obscure. The aim of this study was to examine the level of activity of pp60c-src in NSCLC. pp60c-src expression and in vitro protein tyrosine kinase activity in lung cancer tissue samples were measured by western blotting and in vitro kinase assays and compared with those in the surrounding non-tumour lung tissue from the same patient. pp60c-src phosphorylation was assessed by two-dimensional tryptic phosphopeptide mapping. The kinase activity of pp60c-src was significantly activated in NSCLC, especially in adenocarcinomas. In addition, the pp60c-src kinase activity increased with the size of the adenocarcinoma. Two-dimensional tryptic phosphopeptide mapping showed dephosphorylation of pp60c-src at Tyr 530 in adenocarcinomas. The proto-oncogene product, pp60c-src, was activated in NSCLC, especially in adenocarcinomas, in part through the dephosphorylation of Tyr 530. Our results suggest that activation of pp60c-src might play an important role in the progression of lung adenocarcinomas.
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Affiliation(s)
- T Masaki
- Third Department of Internal Medicine, Kagawa Medical University, 1750-1 Ikenobe Miki-cho, Kagawa 761-0793, Japan
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41
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Yi JY, Yoon YH, Park HS, Kim CH, Kim CH, Kang HJ, Lee E, Kim YY, Jin YJ, Kim TH, Son YS. Reconstruction of basement membrane in skin equivalent; role of laminin-1. Arch Dermatol Res 2001; 293:356-62. [PMID: 11550809 DOI: 10.1007/s004030100234] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
To reconstruct the basement membrane in a skin equivalent, the epidermodermal interface was coated with porcine type IV collagen and mouse laminin-1 at various ratios before keratinocyte seeding. Laminin-1, a component of the basement membrane, induced massive infiltration of keratinocytes into the dermal equivalent, while type IV collagen induced discrete demarcation between dermal and epidermal compartments without any infiltrating cells. Immunohistochemical staining indicated that the laminin-induced infiltrating cells expressed endogenous type IV collagens at the cell periphery, which were not incorporated into the basement membrane structure. The infiltrating cells did not express fibronectin receptor alpha5beta1 integrin but showed MMP-9 secretion and cell surface associated MMP-2. However, when laminin-1 was preincubated with type IV collagen, laminin-1-induced keratinocyte infiltration as well as MMP-9 induction were almost completely suppressed to basal levels. Therefore, replenishment of the type IV collagen lattice seemed to cause laminin-stimulated cells to anchor to the lattice, in a similar manner to the basal cells on the basement membrane of normal skin. Our study suggests that the molar ratio of basement membrane components may determine the behavior of basal cells within the wound healing microenvironment, which is probably regulated either by extracellular matrix deposition or degradation.
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Affiliation(s)
- J Y Yi
- Laboratory of Tissue Engineering, Korea Cancer Center Hospital, Seoul
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42
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Li SZ, Huang PP, Jin YJ. [Effect of sodium ferulate on leucocyte spontaneous activation and surface adhesion molecule expression in arteriosclerosis obliterans patients]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:492-4. [PMID: 12575389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To explore the effect of sodium ferulate (SF) on leucocyte spontaneous activation rate (LSAR) and the surface expression of adhesion molecule (SEAM) in patients with arteriosclerosis obliterans (ASO). METHODS Forty-two patients with ASO were treated by SF, LSAR and SEAM in them were determined qualitatively before and after SF treatment, as well as in 36 healthy subjects for control. RESULTS Therapeutic effect of SF in the treated 42 patients was short-term cured in 17 cases (40.5%), markedly effective in 21 (50%), effective in 2 (4.8%), ineffective in 2(4.8%), and the total effective rate being 95.2%. LSAR and SEAM in ASO patients before treatment was 14.84 +/- 7.54% and 47.94 +/- 13.48% respectively, which was obviously higher than 4.96 +/- 2.04% and 24.12 +/- 9.35% in healthy subjects (P < 0.01) respectively, but markedly reduced to 8.19 +/- 4.09% and 28.63 +/- 7.91% after SF treatment (P < 0.01). CONCLUSION SF could not only obviously lower both LSAR and SEAM but also exert a good therapeutic effect on patients with ASO.
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Affiliation(s)
- S Z Li
- Hospital of Hematologic Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Tianjin 300020
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43
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Lee E, Jeon SH, Yi JY, Jin YJ, Son YS. Calcipotriol inhibits autocrine phosphorylation of EGF receptor in a calcium-dependent manner, a possible mechanism for its inhibition of cell proliferation and stimulation of cell differentiation. Biochem Biophys Res Commun 2001; 284:419-25. [PMID: 11394895 DOI: 10.1006/bbrc.2001.4943] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We report in this study that proliferation inhibition of SCC13 cells by calcipotriol was possibly mediated by its inhibitory effect on autocrine activation of EGF receptor. Based on MTT assay, PCNA staining, DAPI staining, and involucrin immunocytochemical staining, we showed that calcipotriol inhibited cell growth and stimulated differentiation but did not induce apoptosis. Western blot analysis of concanavalin-A-bound fraction demonstrated that calcipotriol specifically dephosphorylated 170- and 66-kDa polypeptides from 8 h posttreatment and complete dephosphorylation was observed at 12 h posttreatment. The 170- and 66-kDa polypeptides were confirmed as EGF receptor and Shc, respectively. Calcipotriol-mediated EGF receptor dephosphorylation required the presence of extracellular calcium. Similar kinetics of the dephosphorylation was also observed in HaCaT cells cultured in medium of high calcium concentration. By BrdU labeling, we also showed calcium dependency of calcipotriol for the inhibition of cell proliferation. Therefore, EGF receptor deactivation by calcipotriol might be a mechanism of action for the inhibition of cell proliferation and the stimulation of differentiation in SCC13 cell and HaCaT cells.
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Affiliation(s)
- E Lee
- National Research Laboratory of Tissue Engineering, Korea Cancer Center Hospital, KAERI, 215-4, Gongneung-Dong, Nowon-Gu, Seoul, 139-706, Korea
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44
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Su MW, Yu CL, Burakoff SJ, Jin YJ. Targeting Src homology 2 domain-containing tyrosine phosphatase (SHP-1) into lipid rafts inhibits CD3-induced T cell activation. J Immunol 2001; 166:3975-82. [PMID: 11238643 DOI: 10.4049/jimmunol.166.6.3975] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
To study the mechanism by which protein tyrosine phosphatases (PTPs) regulate CD3-induced tyrosine phosphorylation, we investigated the distribution of PTPs in subdomains of plasma membrane. We report here that the bulk PTP activity associated with T cell membrane is present outside the lipid rafts, as determined by sucrose density gradient sedimentation. In Jurkat T cells, approximately 5--10% of Src homology 2 domain-containing tyrosine phosphatase (SHP-1) is constitutively associated with plasma membrane, and nearly 50% of SHP-2 is translocated to plasma membrane after vanadate treatment. Similar to transmembrane PTP, CD45, the membrane-associated populations of SHP-1 and SHP-2 are essentially excluded from lipid rafts, where other signaling molecules such as Lck, linker for activation of T cells, and CD3 zeta are enriched. We further demonstrated that CD3-induced tyrosine phosphorylation of these substrates is largely restricted to lipid rafts, unless PTPs are inhibited. It suggests that a restricted partition of PTPs among membrane subdomains may regulate protein tyrosine phosphorylation in T cell membrane. To test this hypothesis, we targeted SHP-1 into lipid rafts by using the N-terminal region of Lck (residues 1--14). The results indicate that the expression of Lck/SHP-1 chimera inside lipid rafts profoundly inhibits CD3-induced tyrosine phosphorylation of CD3 zeta/epsilon, IL-2 generation, and nuclear mobilization of NF-AT. Collectively, these results suggest that the exclusion of PTPs from lipid rafts may be a mechanism that potentiates TCR/CD3 activation.
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Affiliation(s)
- M W Su
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA
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45
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Jin YJ, Song JD. [The inhibitory effect of asODNs on the invasion of colorectal cancer cell line CCL229]. Shi Yan Sheng Wu Xue Bao 2000; 33:21-6. [PMID: 12548848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
To study the inhibitory effect of antisense oligodeoxynucleotide (asODNs) on colrectal cancer cell line CCL229 invasion in vitro. A 15-mer asODNs targeted against the translation start site of UPAR (urokinase-type plasminogen activator receptor) mRNA were introduced into CCL229 cells by lipid-mediated DNA-transfection and the variation of the levels of uPAR mRNA, uPAR antigen expression of the levels of uPAR mRNA, uPAR antigen expression on the cell sruface and invasion properties were observed by reverse transcription-polymerase chain reaction (RT-PCR), flowcytometry(FCM) and aminion invasion assay, the morphological feature of the cell after asODNs treatment was observed by scanning electron microscope(SEM). The results indicate (1) the uPAR/beta-actin ratio was 0.44 +/- 0.02 for the asODNs treated cells, which is significantly lower compared with the control and rONDs treated cells (0.81 +/- 0.01 and 0.750 +/- 0.13 respectively, P < 0.01), (2) the mean fluorescence index of uPAR combined with uPA and the whole uPAR on surface were 0.20 +/- 0.07 and 0.59 +/- 0.09 respectively for asODNs treated cells, which is significantly lower compared with control cells (0.72 +/- 0.12 and 2.21 +/- 0.36 respectively, P < 0.05, P < 0.01); (3) the number of cells migrated the aminion (25 +/- 4, 44 +/- 5 for the control cells) obviously decreased after a-sODNs treatment, (12 +/- 2, 20 +/- 3, P < 0.05); (4) the filopodia and microspikes on the CCL 229 cell surface were decreased after asODNs treatment. The conclusion is that the expression of uPAR on the surface of CCL229 cell surface is responsible for invasity; the inhibitory effect of uPAR as ODNs were highly significant and this method may be of potential clinical interest in gene therapy of cancer.
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Affiliation(s)
- Y J Jin
- Institute of Medical Molecular Biology, China Medical University, Key Laboratory of Cell Biology, Ministry of Public Health of China, Shenyang 110001
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46
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Abstract
We investigated whether anticoagulant therapy with heparin or a selective thrombin inhibitor, argatroban, may ameliorate the postischemic cerebral circulation and attenuate mortality after 10 min of forebrain ischemia. Postischemic subcutaneous injection of argatroban (5 mg/kg) significantly attenuated mortality (9.1%) compared with non-treatment (45.5%) during 14 days' observation period. This effect coincided with: (1) increased cortical CBF after reperfusion; (2) attenuation of brain edema; and (3) less severe cell damages in the cerebral cortex. In contrast, nine of the 22 gerbils treated with heparin (830 IU/kg) were found dead on the next day due to massive bleeding in the surgical wound and 13 bleeding-avoided gerbils did not show significant amelioration in mortality (30.8%). These findings suggest that argatroban is an effective anticoagulant for prevention of cell damage after a relatively long forebrain ischemia.
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Affiliation(s)
- T Mima
- Department of Neurosurgery, Kochi Medical School, Nankoku City, Japan.
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47
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Abstract
STAT5, a member of the signal transducers and activators of transcription (STATs), is important in modulating T cell functions through interleukin-2 (IL-2) receptors. Like other STAT proteins, STAT5 undergoes a rapid activation and inactivation cycle upon cytokine stimulation. Tyrosine phosphorylation and dephosphorylation are critical in regulating STAT5 activity. A number of protein tyrosine kinases have been shown to phosphorylate STAT5; however, the phosphatases responsible for STAT5 dephosphorylation remain unidentified. Using CTLL-20 as a model system, we provide evidence that tyrosine dephosphorylation of STAT5 subsequent to IL-2-induced phosphorylation occurs in the absence of STAT5 nuclear translocation and new protein synthesis. Nevertheless, down-regulation of the upstream Janus kinase activity during the deactivation cycle of IL-2-induced signaling does involve new protein synthesis. These findings point to the constitutive presence of STAT5 tyrosine phosphatase activity in the cytosolic compartment. We further demonstrate that SHP-2, but not SHP-1, directly dephosphorylates STAT5 in an in vitro tyrosine phosphatase assay with purified proteins. Furthermore, tyrosine-phosphorylated STAT5 associates with the substrate-trapping mutant (Cys --> Ser) of SHP-2 but not SHP-1. These results suggest a potential role for cytoplasmic protein-tyrosine phosphatases in directly dephosphorylating STAT proteins and in maintaining a basal steady state level of STAT activity.
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Affiliation(s)
- C L Yu
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Massachusetts 02115, USA
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48
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Abstract
The tyrosine phosphatase SHP-1 functions as a negative regulator in hematopoietic cell development, proliferation, and receptor-mediated cellular activation. In Jurkat T cells, a major 68-kDa band and a minor 70-kDa band were immunoprecipitated by a monoclonal antibody against the SHP-1 protein-tyrosine phosphatase domain, while an antibody against the SHP-1 C-terminal 19 amino acids recognized only the 68-kDa SHP-1. The SDS-gel-purified 70-kDa protein was subjected to tryptic mapping and microsequencing, which was followed by molecular cloning. It revealed that the 70-kDa protein, termed SHP-1L, is a C-terminal alternatively spliced form of SHP-1. SHP-1L is 29 amino acids longer than SHP-1, and its 66 C-terminal amino acids are different from SHP-1. The C terminus of SHP-1L contains a proline-rich motif PVPGPPVLSP, a potential Src homology 3 domain-binding site. In contrast to SHP-1, tyrosine phosphorylation of SHP-1L is not detected upon stimulation in Jurkat T cells. This is apparently due to the lack of a single in vivo tyrosine phosphorylation site, which only exists in the C terminus of SHP-1 (Y564). COS cell-expressed glutathione S-transferase-SHP-1L can dephosphorylate tyrosine-phosphorylated ZAP70. At pH 7.4, SHP-1L was shown to be more active than SHP-1 in the dephosphorylation of ZAP70. At pH 5.4, SHP-1L and SHP-1 exhibited similar catalytic activity. It is likely that these two isoforms play different roles in the regulation of hematopoietic cell signal transduction.
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Affiliation(s)
- Y J Jin
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, USA.
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49
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Cho JH, Roe IH, Jin YJ. Diagnostic p53 expression in gastric endoscopic mucosal resection. J Korean Med Sci 1999; 14:412-6. [PMID: 10485621 PMCID: PMC3054408 DOI: 10.3346/jkms.1999.14.4.412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Endoscopic mucosal resection (EMR) has been standardized for the treatment of intestinal type of intramucosal gastric carcinomas, and careful histological examination of the resected specimen is important for further treatment. To evaluate the diagnostic utility of p53 expression in gastric EMR samples, using immunohistochemical staining, we examined 24 gastric carcinomas (22 intestinal types and two diffuse types) and 20 adenomas removed by EMR. Intestinal type of adenocarcinomas revealed strong p53 expression in 13 cases (59%), weak in four cases (18%), and negative in five cases (23%). Resection margins of 11 carcinomas were involved in the carcinoma cells, which showed the same p53 expression pattern with main carcinoma cells. Squeezed carcinoma cells, remaining in resection margins, were definitely identified by strong p53 expression in seven cases of which the main tumor strongly expressed p53. Microscopic in situ carcinoma could be easily detected in p53 immunostaining. Multifocal involvement and submucosal invasion of carcinomas could be demarcated easily and definitely by strong p53 expression of carcinoma cells. All adenomas showed diffuse weak p53 expression. The difference of p53 expression (p< 0.001) could be used as a differential diagnosis between adenomas and carcinomas. According to these results, we propose that for careful histological examination in hospital diagnosis, both histological evaluation and p53 immunostaining are important diagnostic parameters in EMR samples of the intestinal type of gastric carcinomas.
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Affiliation(s)
- J H Cho
- Department of Pathology, College of Medicine, Dankook University, Chunan, Korea.
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50
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Jin YJ, Friedman J, Burakoff SJ. Regulation of tyrosine phosphorylation in isolated T cell membrane by inhibition of protein tyrosine phosphatases. J Immunol 1998; 161:1743-50. [PMID: 9712039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Jurkat T cells activated by the phosphotyrosine phosphatase inhibitors H2O2 or vanadate were found to have a similar pattern of tyrosine phosphorylation when compared with T cells stimulated by anti-CD3 Ab cross-linking, suggesting that protein tyrosine phosphatase (PTP) inhibitors affect the early steps of TCR signaling. To study the role of PTPs in the most proximal membrane events of tyrosine phosphorylation, subcellular fractions of T cells were treated with the PTP inhibitors in the presence of ATP. In the membrane fraction, tyrosine phosphorylation of Lck, Fyn, and CD3 zeta can be induced by PTP inhibitors, but not by anti-CD3. Detailed characterization of this cell-free system showed that the pattern and the order of induced tyrosine phosphorylation is similar to that induced in intact cells. Upon removal of the PTP inhibitor, the tyrosine-phosphorylated proteins, including Lck, Fyn, Syk, Zap70, and CD35 zeta are rapidly dephosphorylated. Preliminary characterizations indicate that a PTP distinct from CD45, SHP1, and SHP2 is present in T cell membranes and the inhibition of this yet unidentified PTP is most likely responsible for the Lck-dependent tyrosine phosphorylation triggered by PTP inhibitors.
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Affiliation(s)
- Y J Jin
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA
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