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Abnormal subchondral bone remodeling and its association with articular cartilage degradation in knees of type 2 diabetes patients

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Bone Research 2017年第4期5卷 305-316页

作者： Yan Chen Yong-Can Huang Chun Hoi Yan Kwong Yuen Chiu Qingjun Wei Jingmin Zhao X Edward Guo frankie leung William W Lu Department of Bone and Joint Surgery The First Affiliated HospitalGuangxi Medical UniversityChina Department of Orthopaedics and Traumatology The University of Hong KongHong Kong Bone Bioengineering Laboratory Department of Biomedical EngineeringColumbia UniversityNew YorkNYUSA Shenzhen Engineering Laboratory of Orthopaedic Regenerative Technologies Orthopaedic Research CenterPeking University Shenzhen HospitalShenzhenChina

Type 2 diabetes （T2D） is associated with systemic abnormal bone remodeling and bone loss. Meanwhile, abnormal subchondral bone remodeling induces cartilage degradation, resulting in osteoarthritis （OA）. Accordingly, we investigated alterations in subchondral bone remodeling, microstructure and strength in knees from T2D patients and their association with cartilage degradation. Tibial plateaus were collected from knee OA patients undergoing total knee arthroplasty and divided into non-diabetic （n---70） and diabetes （n = 51） groups. Tibial plateaus were also collected from cadaver donors （n = 20） and used as controls. Subchondral bone microstructure was assessed using micro-computed tomography. Bone strength was evaluated by micro-finite-element analysis. Cartilage degradation was estimated using histology. The expression of tartrate-resistant acidic phosphatase （TRAP）, osterix, and osteocalcin were calculated using immunohistochemistry. Osteoarthritis Research Society International （OARSI） scores of lateral tibial plateau did not differ between non-diabetic and diabetes groups, while higher OARSI scores on medial side were detected in diabetes group. Lower bone volume fraction and trabecular number and higher structure model index were found on both sides in diabetes group. These microstructural alterations translated into lower elastic modulus in diabetes group. Moreover, diabetes group had a larger number of TRAP~ osteoclasts and lower number of Osterix~ osteoprogenitors and Osteocalcin~ osteoblasts. T2D knees are characterized by abnormal subchondral bone remodeling and microstructural and mechanical impairments, which were associated with exacerbated cartilage degradation. In regions with intact cartilage the underlying bone still had abnormal remodeling in diabetes group, suggesting that abnormal bone remodeling may contribute to the early pathogenesis of T2D-associated knee OA.

关键词： Th Abnormal subchondral bone remodeling and its association with articular cartilage degradation in knees of type 2 diabetes patients

Magnesium-based Polycaprolactone Porous Bone Scaffold for Large Bone Defect Management

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Magnesium-based Polycaprolactone Porous Bone Scaffold for La...

第二届海峡两岸功能材料科技与产业峰会（2015）

作者： Wong Karen Chu Paul Luk Keith Cheung Kenneth leung frankie Yeung Kelvin Department of Orthopaedics and Traumatology The University of Hong Kong Department of Physics and Materials Science City University of Hong Kong Center of Biomedical Engineering Peking University Shenzhen Institute

INTRODUCTION:Bone autografts and allografts are the gold standard for large bone defect ***,the availability and donor site morbidity during autologous bone graft harvesting procedures and the risk of disease transmission with the use of allografts are ***,synthetic bone scaffolds have been ***,due to the poor mechanical and non-osteoinductive properties of the currently available

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老年人桡骨远端骨折后手术处理的目标

中华创伤骨科杂志 2006年第3期8卷 201-202页

作者：梁加利香港玛丽医院矫形及创伤外科学系

桡骨远端骨折占肢体创伤的14%,常见于骨质疏松的老年人。桡骨远端关节内粉碎性骨折处理棘手,高龄骨质疏松患者的处理则更加困难。过去,高龄骨质疏松性桡骨远端骨折通常采用手法复位、石膏固定治疗,多数患者会出现明显的短缩和对线不良... 详细信息

桡骨远端骨折占肢体创伤的14%,常见于骨质疏松的老年人。桡骨远端关节内粉碎性骨折处理棘手,高龄骨质疏松患者的处理则更加困难。过去,高龄骨质疏松性桡骨远端骨折通常采用手法复位、石膏固定治疗,多数患者会出现明显的短缩和对线不良。为了得到更好的治疗效果,近来出现了许多新的治疗方法。利用微创技术局部注射磷酸钙骨水泥,如NorianSRS被证明可以加速患者的康复,尽管最终的影像学结果并没有明显改善。最近各种类型的带锁螺钉和内植物迅速普及开来。这些内植物带有直接锁定钢板的螺钉,固定角度的螺栓,可以为骨质疏松性骨折提供良好的固定。今后需要手术处理的骨质疏松性桡骨远端骨折会越来越多,我们已经到了需要反思我们治疗这种常见损伤策略的时候了。

关键词：桡骨远端骨折老年人不稳定性骨质疏松

Arthroscopic assessment of soft tissue injuries in comminuted intra-articular fractures of the distal radius

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中华创伤骨科杂志 2006年第3期8卷 203-207页

作者： frankie leung Paata Gudushauri Boris Fung Shew PingChow Department of Orthopaedics and Traumatology Queen Mary HospitalThe University of Hong Kong

Objective To diagnose and evaluate soft tissue injuries in intra-articular fractures of the distal radius using *** Twenty young patients with displaced intra-articular fractures of distal radius were recruited in this prospective *** AO C2 and 17 C3 fractures were *** arthroscopic examination fractures of distal radius were treated by external fixation with limited internal fixation or open plate *** Triangular fibrocartilage complex(TFCC)injury was found in 18 patients(90%).Most were isolated Palmer type 1D injuries(67 %).Scapho-lunate ligament injury wa s found in two patients:one partial tear(grade Ⅱ)and one complete tear(grad e Ⅲ).Follow-ups ranged from 6 to 18 *** the last follow-up,wrist fun ction was excellent in one patient(6%),good in eight(44%)and fair in 11(50 %).Conclusion TFCC injuries are common in intra-articular fractures of the distal radius while injuries to scapho-lunate ligament are uncommon.

关键词：粉碎性骨折软组织损伤 arthroseopy 诊断

Engineered polycaprolactone–magnesium hybrid biodegradable porous scaffold for bone tissue engineering

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Progress in Natural Science:Materials International 2014年第5期24卷 561-567页

作者： Hoi Man Wong Paul K.Chu frankie K.L.leung Kenneth M.C.Cheung Keith D.K.Luk Kelvin W.K.Yeung Department of Orthopaedics and Traumatology The University of Hong Kong Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma The University of Hong Kong Shenzhen Hospital Department of Physics and Materials Science City University of Hong Kong Peking University Shenzhen Institution

In this paper, we describe the fabrication of a new biodegradable porous scaffold composed of polycaprolactone(PCL) and magnesium(Mg)micro-particles. The compressive modulus of PCL porous scaffold was increased to at least 150% by incorporating 29% Mg particles with the porosity of 74% using Micro-CT analysis. Surprisingly, the compressive modulus of this scaffold was further increased to at least 236% when the silane-coupled Mg particles were added. In terms of cell viability, the scaffold modified with Mg particles significantly convinced the attachment and growth of osteoblasts as compared with the pure PCL scaffold. In addition, the hybrid scaffold was able to attract the formation of apatite layer over its surface after 7 days of immersion in normal culture medium, whereas it was not observed on the pure PCL scaffold. This in vitro result indicated the enhanced bioactivity of the modified scaffold. Moreover, enhanced bone forming ability was also observed in the rat model after 3 months of implantation. Though bony in-growth was found in all the implanted scaffolds. High volume of new bone formation could be found in the Mg/PCL hybrid scaffolds when compared to the pure PCL scaffold. Both pure PCL and Mg/PCL hybrid scaffolds were degraded after 3 months. However, no tissue inflammation was observed. In conclusion, these promising results suggested that the incorporation of Mg micro-particles into PCL porous scaffold could significantly enhance its mechanical and biological properties. This modified porous bio-scaffold may potentially apply in the surgical management of large bone defect fixation.

关键词： Magnesium Polycaprolactone Biodegradability Biocompatibility Mechanical properties

Identification of optimal contemporary antiemetic prophylaxis for doxorubicin-cyclophosphamide chemotherapy in Chinese cancer patients: post-hoc analysis of 3 prospective studies

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Cancer Biology & Medicine 2021年第3期18卷 825-832页

作者： Winnie Yeo leung Li Thomas KH Lau Kwai T Lai Vicky,TC Chan Kwan H Wong Christopher CH Yip Elizabeth Pang Maggie Cheung Vivian Chan Carol CH Kwok Joyce JS Suen frankie KF Mo Department of Clinical Oncology Prince of Wales HospitalFaculty of MedicineHong Kong Cancer InstituteHong KongChina State Key Laboratory of Translational Oncology The Chinese University of Hong KongHong KongChina Department of Clinical Oncology Princess Margaret HospitalHong KongChina

Objective:Chemotherapy-induced nausea and vomiting(CINV)are common with doxorubicin-cyclophosphamide(AC)*** antiemetic regimens incorporate neurokinin-1 receptor antagonist(NK1 RA),5-hydroxytryptamine type-3 receptor antagonist(5 HT3 RA),corticosteroid,and dopamine *** post-hoc analysis compared results of 3 prospective antiemetic studies conducted among Chinese breast cancer patients who received(neo)adjuvant AC,in order to identify optimal antiemetic ***:A total of 304 patients were included:Group 1,ondansetron/dexamethasone(D1);Group 2,aprepitant/ondansetron/dexamethasone(D1);Group 3,aprepitant/ondansetron/dexamethasone(D1–3);Group 4,aprepitant/ondansetron/dexamethasone(D1–3)/olanzapine;and Group 5,netupitant/palonosetron/dexamethasone(D1–3).Antiemetic efficacies of Groups 3,4,and 5 during cycle 1 of AC were individually compared with Group *** addition,emesis outcomes of patients in Groups 3 and 5,and those of Groups 2 and 3,were ***:When comparing efficacies of a historical doublet(5 HT3 RA/dexamethasone)with triplet antiemetic regimens(NK1 RA/5 HT3 RA/dexamethasone)with/without olanzapine,complete response(CR)percentages and quality of life(QOL)in overall phase of cycle 1 AC were compared between Group 1 and the other groups:Group 1 vs.3,41.9%vs.38.3%(P=0.6849);Group 1 vs.4,41.9%vs.65.0%(P=0.0107);and Group 1 vs.5,41.9%vs.60.0%(P=0.0460).Groups 4 and 5 achieved a better *** comparing netupitant-based(Group 3)with aprepitant-based(Group 5)triplet antiemetics,CR percentages were 38.3%vs.60.0%,respectively(P=0.0176);Group 5 achieved a better *** comparing 1 day(Group 2)vs.3 day(Group 3)dexamethasone,CR percentages were 46.8%and 38.3%,respectively(P=0.3459);Group 3 had a worse ***:Aprepitant-containing triplets were non-superior to doublet ***-containing triplets and adding olanzapine to aprepitant-containing triplets were superior to ***/palono

关键词： Netupitant palonosetron aprepitant olanzapine NEPA Asians

Upfront consolidation treatment with 131I-mIBG followed by myeloablative chemotherapy and hematopoietic stem cell transplantation in high-risk neuroblastoma

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Pediatric Investigation 2020年第3期4卷 168-177页

作者： Jianhua Feng frankie WT Cheng Alex WK leung Vincent Lee Eva WM Yeung Hoi Ching Lam Jeanny Cheung Grace KS Lam Terry TW Chow Carol LS Yan Chi Kong Li Department of Paediatrics The Chinese University of Hong KongHong KongChina Department of Paediatrics The First Affiliated Hospital of Wenzhou Medical UniversityWenzhouChina Department of Paediatrics and Adolescent Medicine Hong Kong Children’s HospitalHong KongChina Department of Clinical Oncology Prince of Wales HospitalThe Chinese University of Hong KongHong KongChina

Importance:131I-metaiodobenzylguanidine(131I-mIBG)has a significant targeted antitumor effect for ***,currently there is a paucity of data for the use of 131I-mIBG as a"front-line"therapeutic agent in those patients with newly diagnosed high-risk neuroblastoma as part of the conditioning regimen for myeloablative chemotherapy(MAC).Objective:To evaluate the feasibility of upfront consolidation treatment with 131I-mIBG plus MAC and hematopoietic stem cell transplantation(HSCT)in high-risk neuroblastoma ***:A retrospective,single-center study was conducted from 2003-2019 on newly diagnosed high-risk neuroblastoma patients without progressive disease(PD)after the completion of induction *** received 131I-mIBG infusion and MAC followed by ***:A total of 24 high-risk neuroblastoma patients were enrolled with a median age of 3.0 years at *** receiving this sequential consolidation treatment,3 of 13 patients who were in partial response(PR)before 131I-mIBG treatment achieved either complete response(CR)(n=1)or very good partial response(VGPR)(n=2)after *** a median follow-up duration of 13.0 months after 131I-mIBG therapy,the 5-year event-free survival and overall survival rates estimated were 29%and 38%for the entire cohort,and 53%and 67%for the patients who were in CR/VGPR at the time of 131I-mIBG ***:Upfront consolidation treatment with 131I-mIBG plus MAC and HSCT is feasible and tolerable in high-risk neuroblastoma patients,however the survival benefit of this 131I-mIBG regimen is only observed in the patients who were in CR/VGPR at the time of 131I-mIBG treatment.

关键词： Neuroblastoma 131I-mIBG Transplantation

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