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High formability Mg-Zn-Gd wire facilitates ACL reconstruction via its swift degradation to accelerate intra-tunnel endochondral ossification

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Journal of Magnesium and Alloys 2024年第1期12卷 295-315页

作者： Xuan He Ye Li Hongwei Miao Jiankun Xu Michael Tim-yun Ong Chenmin Wang Lizhen Zheng Jiali Wang Le Huang Haiyue Zu Zhi Yao Jie Mi Bingyang Dai Xu Li Patrick Shu-hang Yung Guangyin Yuan Ling Qin Musculoskeletal Research Laboratory of Department of Orthopaedics&Traumatology and Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory of Li Ka Shing Institute of Health Sciences The Chinese University of Hong KongHong KongChina National Engineering Research Center of Light Alloy Net Forming School of Materials Science&EngineeringShanghai Jiao Tong UniversityShanghaiChina Department of Orthopaedics and Traumatology Li Ka Shing Faculty of MedicineThe University of Hong KongHong KongChina Orthopaedic Department Peking University Third HospitalBeijingChina Department of Rehabilitation Sciences The Hong Kong Polytechnic UniversityHong KongChina

After reconstructing the anterior cruciate ligament(ACL),unsatisfactory bone tendon interface healing may often induce tunnel enlargement at the early healing *** good biological features and high formability,Magnesium-Zinc-Gadolinium(ZG21)wires are developed to bunch the tendon graft for matching the bone tunnel during ***,tensile strength,degradation,and cytotoxicity of ZG21 wire are *** rabbit model is used for assessing the biological effects of ZG21 wire by Micro-CT,histology,and mechanical *** SEM/EDS,immunochemistry,and in vitro assessments are performed to investigate the underlying *** tests demonstrate the high formability of ZG21 wire as surgical ***-CT shows ZG21 wire degradation accelerates tunnel bone formation,and histologically with earlier and more fibrocartilage regeneration at the healing *** mechanical test shows higher ultimate load in the ZG21 *** SEM/EDS presents ZG21 wire degradation triggered calcium phosphate(Ca-P)*** results demonstrate upregulation of Wnt3a,BMP2,and VEGF at the early phase and TGFβ3 and Type II collagen at the late phase of *** vitro tests also confirmed the Ca-P in the metal extract could elevate the expression of Wnt3a,βcatenin,ocn and opn to stimulate *** vivo tests of clinical samples indicated suturing with ZG21 wire did not weaken the ultimate loading of human tendon *** conclusion,the ZG21 wire is feasible for tendon graft *** degradation products accelerated intra-tunnel endochondral ossification at the early healing stage and therefore enhanced bone-tendon interface healing in ACL reconstruction.

关键词： Magnesium wire ACL reconstruction Magnesium alloy Biomaterials endochondral ossification

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The association and underlying mechanism of the digit ratio(2D:4D)in hypospadias

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Asian Journal of Andrology 2024年第4期26卷 356-365页

作者： Yu Ding Zu-Quan Chen Wen-Feng Pan Hao-Jie Chen Min Wu Yi-Qing Lyu Hua Xie Yi-Chen Huang Zhong-Zhong Chen Fang Chen Department of Urology Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China Urogenital Development Research Center Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China Clinical Research Center for Hypospadias Pediatric CollegeShanghai Jiao Tong University School of MedicineShanghai 200062China.

The second-to-fourth digit(2D:4D)ratio is thought to be associated with prenatal androgen ***,the relationship between the 2D:4D ratio and hypospadias is poorly understood,and its molecular mechanism is not *** this study,by analyzing the hand digit length of 142 boys with hypospadias(23 distal,68 middle,and 51 proximal)and 196 controls enrolled in Shanghai Children’s Hospital(Shanghai,China)from December 2020 to December 2021,we found that the 2D:4D ratio was significantly increased in boys with hypospadias(Pendochondral *** study indicates that the ratio of 2D:4D is a risk marker of hypospadias and provides a potential molecular mechanism.

关键词： androgen receptor digit ratio(2D:4D) endochondral ossification hypospadias testosterone level

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Skeletal stem cells in bone development,homeostasis,and disease

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Protein & Cell 2024年第8期15卷 559-574页

作者： Guixin Yuan Xixi Lin Ying Liu Matthew B.Greenblatt Ren Xu The First Affliated Hospital of Xiamen University-ICMRS Collaborating Center for Skeletal Stem Cell State Key Laboratory of Cellular Stress BiologySchool of MedicineFaculty of Medicine and Life SciencesXiamen UniversityXiamen 361005China Xiamen Key Laboratory of Regeneration Medicine Fujian Provincial Key Laboratory of Organ and Tissue RegenerationOrgan Transplantation InstituteSchool of MedicineXiamen UniversityXiamen 361102China Department of Pathology and Laboratory Medicine Weill Cormell Medical CollegeNew YorkNY 10065USA Research Division Hospital for Special SurgeryNew YorkNY10065USA

Tissue-resident stem cells are essential for development and repair,and in the skeleton,this function is fulfilled by recently identified skeletal stem cells(SSCs).However,recent work has identified that SSCs are not monolithic,with long bones,craniofacial sites,and the spine being formed by distinct stem *** studies have utilized techniques such as fluorescence-activated cell sorting,lineage tracing,and single-cell sequencing to investigate the involvement of ssCs in bone development,homeostasis,and *** investigations have allowed researchers to map the lineage commitment trajectory of ssCs in different parts of the body and at different time ***,recent studies have shed light on the characteristics of ssCs in both physiological and pathological *** review focuses on discussing the spatiotemporal distribution of ssCs and enhancing our understanding of the diversity and plasticity of ssCs by summarizing recent discoveries.

关键词： skeletal stem cells bone development endochondral ossification intramembranous ossification lineage tracing

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Sox9 augments BMP2-induced chondrogenic differentiation by downregulating Smad7 in mesenchymal stem cells(MSCs)

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Genes & Diseases 2017年第4期4卷 229-239页

作者： Chen Zhao Wei Jiang Nian Zhou Junyi Liao Mingming Yang Ning Hu Xi Liang Wei Xu Hong Chen Wei Liu Lewis L.Shi Leonardo Oliveira Jennifer Moriatis Wolf Sherwin Ho Aravind Athiviraham H.M.Tsai Tong-Chuan He Wei Huang Department of Orthopedic Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Molecular Oncology Laboratory Department of Orthopaedic Surgery and Rehabilitation MedicineThe University of Chicago Medical CenterChicagoIL 60637USA Department of Radiology The University of ChicagoChicagoIL 60637USA

Cartilage injuries caused by arthritis or trauma pose formidable challenges for effective clinical management due to the limited intrinsic proliferative capability of *** stem cell-based therapies and transgene-enhanced cartilage tissue engineering may open new avenues for the treatment of cartilage *** morphogenetic protein 2(BMP2)induces effective chondrogenesis of mesenchymal stem cells(MSCs)and can thus be explored as a potential therapeutic agent for cartilage defect ***,BMP2 also induces robust endochondral *** the precise mechanisms through which BMP2 governs the divergence of chondrogenesis and osteogenesis remain to be fully understood,blocking endochondral ossification during BMP2-induced cartilage formation may have practical significance for cartilage tissue ***,we investigate the role of Sox9-donwregulated Smad7 in BMP2-induced chondrogenic differentiation of *** find that overexpression of Sox9 leads to a decrease in BMP2-induced Smad7 expression in ***9 inhibits BMP2-induced expression of osteopontin while enhancing the expression of chondrogenic marker Col2a1 in *** expression of Sox9 in MSCs promotes BMP2-induced chondrogenesis and suppresses BMP2-induced endochondral *** Smad7 expression inhibits BMP2-induced chondrogenesis in stem cell implantation *** limb explant assay reveals that Sox9 expands BMP2-stimulated chondrocyte proliferating zone while Smad7 promotes BMP2-intitated hypertrophic zone of the growth *** cycle analysis indicates that Smad7 induces significant early apoptosis in BMP2-stimulated *** together,our results strongly suggest that Sox9 may facilitate BMP2-induced chondrogenesis by downregulating Smad7,which can be exploited for effective cartilage tissue engineering.

关键词： Bone morphogenetic protein 2(BMP2) Cartilage tissue engineering Chondrogenic differentiation endochondral ossification Mesenchymal stem cells(MSCs) Smad7 Sox9

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The role of vascular endothelial growth factor in ossification

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International Journal of Oral Science 2012年第2期4卷 64-68页

作者： Yan-Qi Yang Ying-Ying Tan Ricky Wong Alex Wenden Lin-Kun Zhang A bakr M Rabie Department of Orthodontics Faculty of Dentistry The University of Hong Kong Hong Kong China Unit Pakar Ortodontik Klinik Pergigian Poliklinik Komuniti Mak MandinMalaysia Department0fOrfhodonflcs Tlanj}nsfomafoI.gicalH.spJcaJ.iNankaiunIversityTianjinchinaand PrivatePracticeC0rrespondence:DrYQYang DepartmentDfOrthodonticsFacultyofDentIstryTheUnlversity硝HongKong34HospnalRoadHOngK0ngSARChinaE—maiJ=yan副anq@hkuhk

Osteogenesis and angiogenesis are two closely correlated processes during bone growth, development, remodelling and repair. Vascular endothelial growth factor （VEGF） is an essential mediator during the process of angiogenesis. Based on an extensive literature search, which was carried out using the PubMed database and the keywords of osteogenesis, VEGF, endochondral ossification and intramembranous ossification, this manuscript reviews the role of VEGF in ossification, with emphasis on its effect in endochondral and intramembranous ossification. Osteogenesis and angiogenesis are closely correlated processes. VEGF acts as an essential mediator durin~ these processes. It not only functions in bone an^io^enesis but also in various aspects of bone develooment.

关键词： endochondral ossification intramembranous ossification osteogenesis vascular endothelial growth factor

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New perspective of skeletal stem cells

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Biomaterials Translational 2022年第4期3卷 280-294页

作者： Guixin Yuan Zan Li Xixi Lin Na Li Ren Xu The First Affiliated Hospital of Xiamen University-ICMRS Collaborating Centre for Skeletal Stem Cell State Key Laboratory of Cellular Stress BiologyFaculty of Medicine and Life SciencesXiamen UniversityXiamenFujian ProvinceChina Xiamen Key Laboratory of Regeneration Medicine Fujian Provincial Key Laboratory of Organ and Tissue RegenerationSchool of MedicineSchool of MedicineXiamen UniversityXiamenFujian ProvinceChina Department of Human Anatomy School of MedicineXiamen UniversityXiamenFujian ProvinceChina Department of Sports Medicine&Research Centre of Sports Medicine Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina

Tissue-resident stem cells are a group of stem cells distinguished by their capacity for self-renewal and multilineage differentiation capability with tissue *** these tissue-resident stem cells,skeletal stem cells(SSCs)were discovered in the growth plate region through a combination of cell surface markers and lineage tracing *** the process of unravelling the anatomical variation of SSCs,researchers were also keen to investigate the developmental diversity outside the long bones,including in the sutures,craniofacial sites,and spinal ***,fluorescence-activated cell sorting,lineage tracing,and single-cell sequencing have been used to map lineage trajectories by studying SSCs with different spatiotemporal *** SSC niche also plays a pivotal role in regulating SSC fate,such as cell-cell interactions mediated by multiple signalling *** review focuses on discussing the spatial and temporal distribution of SSCs,and broadening our understanding of the diversity and plasticity of SSCs by summarizing the progress of research into SSCs in recent years.

关键词： bone repair endochondral ossification growth plate lineage tracing skeletal stem cells

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