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| 1 | Biodegradable Zn-Sr alloy for bone regeneration in rat femoral condyle defect model: In vitro and in vivo studies显示文摘Bone defects are commonly caused by severe trauma,malignant tumors,or congenital diseases and remain among the toughest clinical problems faced by orthopedic surgeons,especially when of critical size.Biodegradable zinc-based metals have recently gained popularity for their desirable biocompatibility,suitable degradation rate,and favorable osteogenesis-promoting properties.The biphasic activity of Sr promotes osteogenesis and inhibits osteoclastogenesis,which imparts Zn-Sr alloys with the ideal theoretical osteogenic properties.Herein,a biodegradable Zn-Sr binary alloy system was fabricated.The cytocompatibility and osteogenesis of the Zn-Sr alloys were significantly better than those of pure Zn in MC3T3-E1 cells.RNA-sequencing illustrated that the Zn-0.8Sr alloy promoted osteogenesis by activating the wnt/β-catenin,PI3K/Akt,and MAPK/Erk signaling pathways.Furthermore,rat femoral condyle defects were repaired using Zn-0.8Sr alloy scaffolds,with pure Ti as a control.The scaffold-bone integration and bone ingrowth confirmed the favorable in vivo repair properties of the Zn-Sr alloy,which was verified to offer satisfactory biosafety based on the hematoxylin-eosin(H&E)staining and ion concentration testing of important organs.The Zn-0.8Sr alloy was identified as an ideal bone repair material candidate,especially for application in critical-sized defects on load-bearing sites due to its favorable biocompatibility and osteogenic properties in vitro and in vivo. | Bo Jia Hongtao Yang Zechuan Zhang Xinhua Qu Xiufeng Jia Qiang Wu Yu Han Yufeng Zheng Kerong Dai | 2021 | Bioactive Materials2021，6，6： | 9 |
| 2 | Serum zinc levels and multiple health outcomes: Implications for zinc-based biomaterials显示文摘Background:Zinc-based biomaterials,including biodegradable metal,nanoparticles,and coatings used in medical implants release zinc ions that may increase the whole-body and serum zinc concentrations.The impact of serum zinc concentrations on major health outcomes can provide insights for device design and clinical transformation of zinc-based biomaterials.Methods:This nationally representative cross-sectional study enrolled participants from the National Health and Nutrition Examination Survey(NHANES,2011-2014)including 3607 participants.Using unadjusted and multivariate-adjusted logistic regression analyses,two-piecewise linear regression model with a smoothing function and threshold level analysis,we evaluated the associations between elevated serum zinc levels and major health outcomes.Results:Elevated serum zinc levels were significantly associated with an increase in total spine and total femur bone mineral density(BMD).Every 10μg/dL increase was associated with a 1.12-fold increase in diabetes mellitus(DM)and 1.23-fold and 1.29-fold increase in cardiovascular diseases(CVD)and coronary heart disease(CHD),in participants with serum zinc levels≥100μg/dL.It had no significant linear or nonlinear associations with risk of fractures,congestive heart failure,heart attack,thyroid disease,arthritis,osteoarthritis,rheumatoid arthritis,dyslipidemia and cancer.Conclusion:Serum zinc levels are significantly associated with increased BMD in the total spine and total femur,and risk of DM,and CVD/CHD among participants with serum zinc levels≥100μg/dL. | Xinhua Qu Hongtao Yang Zhifeng Yu Bo Jia Han Qiao Yufeng Zheng Kerong Dai | 2020 | Bioactive Materials2020，5，2： | 7 |
| 3 | A 3D-Bioprinted dual growth factor-releasing intervertebral disc scaffold induces nucleus pulposus and annulus fibrosus reconstruction显示文摘Regeneration of Intervertebral disc(IVD)is a scientific challenge because of the complex structure and composition of tissue,as well as the difficulty in achieving bionic function.Here,an anatomically correct IVD scaffold composed of biomaterials,cells,and growth factors were fabricated via three-dimensional(3D)bioprinting technology.Connective tissue growth factor(CTGF)and transforming growth factor-β3(TGF-β3)were loaded onto polydopamine nanoparticles,which were mixed with bone marrow mesenchymal stem cells(BMSCs)for regenerating and simulating the structure and function of the nucleus pulposus and annular fibrosus.In vitro experiments confirmed that CTGF and TGF-β3 could be released from the IVD scaffold in a spatially controlled manner,and induced the corresponding BMSCs to differentiate into nucleus pulposus like cells and annulus fibrosus like cells.Next,the fabricated IVD scaffold was implanted into the dorsum subcutaneous of nude mice.The reconstructed IVD exhibited a zone-specific matrix that displayed the corresponding histological and immunological phenotypes:primarily type II collagen and glycosaminoglycan in the core zone,and type I collagen in the surrounding zone.The testing results demonstrated that it exhibited good biomechanical function of the reconstructed IVD.The results presented herein reveal the clinical application potential of the dual growth factors-releasing IVD scaffold fabricated via 3D bioprinting.However,the evaluation in large mammal animal models needs to be further studied. | Binbin Sun Meifei Lian Yu Han Xiumei Mo Wenbo Jiang Zhiguang Qiao Kerong Dai | 2021 | Bioactive Materials2021，6，1： | 5 |
| 4 | Zinc alloy-based bone internal fixation screw with antibacterial and anti-osteolytic properties显示文摘There is no targeted effective treatment for patients undergoing internal fixation surgery/two-stage total joint revision surgery with a high risk of postoperative infection and osteolysis,while the rate of reoperation due to infection and osteolysis remains high.In this study,we report a pioneering application of implants made of biodegradable Zn-Ag alloy with active antibacterial and anti-osteolytic properties in three classical animal models,illustrating antibacterial,anti-osteolysis,and internal fixation for fractures.The antibacterial activity of the Zn-2Ag alloy was verified in a rat femur osteomyelitis prevention model,while the anti-osteolytic properties were evaluated using a mouse cranial osteolysis model.Moreover,the Zn-2Ag based screws showed similar performance in bone fracture fixation compared to the Ti-6Al-4V counterpart.The fracture healed completely after 3 months in the rabbit femoral condyle fracture model.Furthermore,the underlying antibacterial mechanism may include inhibition of biofilm formation,autolysis-related pathways,and antibiotic resistance pathways.Osseointegration mechanisms may include inhibition of osteoclast-associated protein expression,no effect on osteogenic protein expression,and no activation of related inflammatory protein expression.The empirical findings here reveal the great potential of Zn-Ag-based alloys for degradable biomaterials in internal fixation surgery/two-stage total joint revision surgery for patients with a high risk of postoperative infection and osteolysis. | Xinhua Qu Hongtao Yang Bo Jia Minqi Wang Bing Yue Yufeng Zheng Kerong Dai | 2021 | Bioactive Materials2021，6，12： | 4 |
| 5 | 3D Printing Hip Prostheses Offer Accurate Reconstruction,Stable Fixation,and Functional Recovery for Revision Total Hip Arthroplasty with Complex Acetabular Bone Defect显示文摘Complicated and large acetabular bone defects present the main challenges and difficulty in the revision of total hip arthroplasty(THA).This study aimed to explore the advantages of three-dimensional(3D)printing technology in the reconstruction of such acetabular bone defects.We retrospectively analyzed the prognosis of four severe bone defects around the acetabulum in three patients who were treated using 3D printing technology.Reconstruction of bone defect by conventional methods was difficult in these patients.In this endeavor,we used radiographic methods,related computer software such as Materialise's interactive medical image control system and Siemens NX software,and actual surgical experience to estimate defect volume,prosthesis stability,and installation accuracy,respectively.Moreover,a Harris hip score was obtained to evaluate limb function.It was found that bone defects could be adequately reconstructed using a 3D printing prosthesis,and its stability was reliable.The Harris hip score indicated a very good functional recovery in all three patients.In conclusion,3D printing technology had a good therapeutic effect on both complex and large bone defects in the revision of THA.It was able to achieve good curative effects in patients with large bone defects. | Yongqiang Hao Lei Wang Wenbo Jiang Wen Wu Songtao Ai Lu Shen Shuang Zhao Kerong Dai | 2020 | Engineering2020，6，11： | 4 |
| 6 | Biodegradable ZnLiCa ternary alloys for critical-sized bone defect regeneration at load-bearing sites:In vitro and in vivo studies显示文摘A novel biodegradable metal system,ZnLiCa ternary alloys,were systematically investigated both in vitro and in vivo.The ultimate tensile strength(UTS)of Zn0.8Li0.1Ca alloy reached 567.60±9.56 MPa,which is comparable to pure Ti,one of the most common material used in orthopedics.The elongation of Zn0.8Li0.1Ca is 27.82±18.35%,which is the highest among the ZnLiCa alloys.The in vitro degradation rate of Zn0.8Li0.1Ca alloy in simulated body fluid(SBF)showed significant acceleration than that of pure Zn.CCK-8 tests and hemocompatibility tests manifested that ZnLiCa alloys exhibit good biocompatibility.Real-time PCR showed that Zn0.8Li0.1Ca alloy successfully stimulated the expressions of osteogenesis-related genes(ALP,COL-1,OCN and Runx-2),especially the OCN.An in vivo implantation was conducted in the radius of New Zealand rabbits for 24 weeks,aiming to treat the bone defects.The Micro-CT and histological evaluations proved that the regeneration of bone defect was faster within the Zn0.8Li0.1Ca alloy scaffold than the pure Ti scaffold.Zn0.8Li0.1Ca alloy showed great potential to be applied in orthopedics,especially in the load-bearing sites. | Zechuan Zhang Bo Jia Hongtao Yang Yu Han Qiang Wu Kerong Dai Yufeng Zheng | 2021 | Bioactive Materials2021，6，11： | 3 |
| 7 | High-precision,gelatin-based,hybrid,bilayer scaffolds using melt electro-writing to repair cartilage injury显示文摘Articular cartilage injury is a common disease in the field of orthopedics.Because cartilage has poor self-repairing ability,medical intervention is needed.Using melt electro-writing(MEW)technology,tissue engineering scaffolds with high porosity and high precision can be prepared.However,ordinary materials,especially natural polymer materials,are difficult to print.In this study,gelatin was mixed with poly(lactic-co-glycolic acid)to prepare high-concentration and high-viscosity printer ink,which had good printability and formability.A composite scaffold with full-layer TGF-β1 loading mixed with hydroxyapatite was prepared,and the scaffold was implanted at the cartilage injury site;microfracture surgery was conducted to induce the mesenchyme in the bone marrow.Quality stem cells thereby promoted the repair of damaged cartilage.In summary,this study developed a novel printing method,explored the molding conditions based on MEW printing ink,and constructed a bioactive cartilage repair scaffold.The scaffold can use autologous bone marrow mesenchymal stem cells and induce their differentiation to promote cartilage repair. | Yu Han Bo Jia Meifei Lian Binbin Sun Qiang Wu Benlin Sun Zhiguang Qiao Kerong Dai | 2021 | Bioactive Materials2021，6，7： | 2 |
| 8 | Double-edged effects caused by magnesium ions and alkaline environment regulate bioactivities of magnesium-incorporated silicocarnotite in vitro显示文摘Magnesium(Mg)is an important element for its enhanced osteogenic and angiogenic properties in vitro and in vivo,however,the inherent alkalinity is the adverse factor that needs further attention.In order to study the role of alkalinity in regulating osteogenesis and angiogenesis in vitro,magnesium-silicocarnotite[Mg-Ca5(PO4)2SiO4,Mg-CPS]was designed and fabricated.In this study,Mg-CPS showed better osteogenic and angiogenic properties than CPS within 10wt.%magnesium oxide(MgO),since the adversity of alkaline condition was covered by the benefits of improved Mg ion concentrations through activating Smad2/3-Runx2 signaling pathway in MC3T3-E1 cells and PI3K-AKT signaling pathway in human umbilical vein endothelial cells in vitro.Besides,provided that MgO was incorporated with 15wt.%in CPS,the bioactivities had declined due to the environment consisting of higher-concentrated Mg ions,stronger alkalinity and lower Ca/P/Si ions caused.According to the results,it indicated that bioactivities of Mg-CPS in vitro were regulated by the double-edged effects,which were the consequence of Mg ions and alkaline environment combined.Therefore,if MgO is properly incorporated in CPS,the improved bioactivities could cover alkaline adversity,making Mg-CPS bioceramics promising in orthopedic clinical application for its enhancement of osteogenesis and angiogenesis in vitro. | Qiang Wu Shunxiang Xu Fei Wang Bo He Xin Wang Ye Sun Congqin Ning Kerong Dai | 2021 | Regenerative Biomaterials2021，8，6： | 2 |
| 9 | Generating 3D-cultured organoids for pre-clinical modeling and treatment of degenerative joint disease显示文摘Dear Editor,Human cell-based and personalized in vitro cartilage models are urgently needed for osteoarthritis treatment in pre-clinical regenerative medicine development.Cellular self-assemblies and condensations of the appropriate stem cells could initiate the formation of transient tissue structures programmed for specific organogenesis processes.1 This recapitulation of developmental events has previously been demonstrated for the formation of cardiac,epithelial and liver organoids.However,there has been very limited progress in the development of human cartilage organoids for osteoarthritis(OA).2 Here,we describe the fabrication of functional bioengineered cartilage organoid suitable for OA treatment.Briefly,agarose microwell inserts for formation of a high number of synovial mesenchymal stromal cell(SMSC)organoids with homogeneous size distribution were created as previously described by Leijten et al.33D-cultured SMSC organoids were generated and phenotypically analyzed for potential applications in OA modeling and treatment(Fig.1a). | Ye Sun Qiang Wu Kerong Dai Yongqing You Wenbo Jiang | 2021 | Signal Transduction and Targeted Therapy2021，6，12： | 2 |
| 10 | Effect of body fat stores on total and regional bone mineral density in perimenopausal Chinese women显示文摘 | Zhifeng Yu Zhenan Zhu Tingting Tang Kerong Dai Shijing Qiu | 2009 | Journal of Bone and Mineral Metabolism2009，，3： | 1 |
| 11 | Proliferation and osteoblastic differentiation of human bone marrow-derived stromal cells on akermanite-bioactive ceramics显示文摘 | Hongli Sun Chengtie Wu Kerong Dai Jiang Chang Tingting Tang | 2006 | Biomaterials2006，，33： | 1 |
| 12 | An investigation of the selective stress-shielding efect of shape-memory saw tooth-arm embracing fixat0r显示文摘 | Kerong DAI Xiaotao WU Xiao shui ZU | | 0，，394： | 1 |
| 13 | The role of CCAAT/enhancer binding protein (C/EBP)‐α in osteogenesis of C3H10T1/2 cells induced by BMP‐2显示文摘 | Qiming Fan Tingting Tang Xiaoling Zhang Kerong Dai | 2009 | Journal of Cellular and Molecular Medicine2009，，： | 1 |
| 14 | Postoperative infection caused by Acinetobacter baumannii misdiagnosed as a free-living amoeba species in a humeral head hemiarthroplasty patient:a case report显示文摘Background:Acinetobacter baumannii is ubiquitous,facultative intracellular,and opportunistic bacterial pathogen.Its unique abilities allow it to survive in a diverse range of environments,including health care settings,leading to nosocomial infections.And its exceptional ability to develop resistance to multiple antibiotics leaves few drug options for treatment.It has been recognized as a leading cause of nosocomial pneumonia and bacteremia over the world.Case presentation:In this case,a 73-year-old woman presented with a Neer Group VI proximal humeral fracture.Six hours after a successfully performed hemiarthroplasty,she developed continuous fever.Clinical examination revealed that the vitals were regular.Laboratory and radiographic examinations revealed only elevated procalcitonin levels.Blood culture revealed no bacterial or fungal growth.Cooling treatment and empirical broad-spectrum antibiotic therapy showed no apparent effect.Conclusions:We report a postoperative infection caused by Acinetobacter baumannii.The infectious pathogen was identified via molecular DNA sequencing and was initially misidentified as a free-living amoeba species upon microscopic examinations.The patient was mistreated with antiamebic combination therapy.Her symptoms persisted for over 4 months and were eventually followed by her death. | Jiaxin Tang Huaimin Zhu Li Cai Tingting Tang Jian Tang Yuehua Sun Ming Liu Kerong Dai Zhiguang Qiao Chao Yu | 2018 | Infectious Diseases of Poverty2018，7，1： | 1 |
| 15 | An investigation of the selective stress-shielding effect of shape-memory sawtooth-arm embracing fixator显示文摘 | Kerong Dai Xiaotao Wu Xiaoshui Zu | 2002 | Materials Science Forum2002，，394： | 1 |
| 16 | Reverse engineering in CAD model reconstruction of customized artificial joint 显示文摘 | Lin Yanping Wang Chengtao Dai Kerong | 2005 | Medical Engineering & Physics2005，27，2： | 1 |
| 17 | Multi-element determination in cancellous bone of human femoral head by PIXE显示文摘 | Yuanxun Zhang Youngping Zhang Yongpeng Tong Shijing Qui Xiaotao Wu Kerong Dai | 1996 | Journal of Radioanalytical and Nuclear Chemistry Letters1996，，5： | 1 |
| 18 | Effect of berberine on Staphylococcus epidermidis biofilm formation显示文摘 | Xiaoqing Wang Xiao Yao Zhen’an Zhu Tingting Tang Kerong Dai Irina Sadovskaya Sigrid Flahaut Said Jabbouri | 2008 | International Journal of Antimicrobial Agents2008，，1： | 1 |
| 19 | Extraction and chemical characterization of Angelica sinensis polysaccharides and its antioxidant activity显示文摘 | Songtao Ai Xindong Fan Linfeng Fan Qi Sun Yu Liu Xiaofeng Tao Kerong Dai | 2013 | Carbohydrate Polymers2013，，： | 1 |
| 20 | Bio-inspired, bio-degradable adenosine 5′ -diphosphate-modified hyaluronic acid coordinated hydrophobic undecanal-modified chitosan for hemostasis and wound healing显示文摘Uncontrolled hemorrhage and wound infection are crucial causes of trauma-associated death in both the military and the clinic. Therefore, developing an efficient and rapid hemostatic method with biocompatibility, easy degradation, and wound healing is of great importance and desirability. Inspired by spontaneous blood cell plug formation in the hemostasis process, an adenosine 5′-diphosphate modified pro-coagulation hyaluronic acid (HA-ADP) coordinated with enhanced antibacterial activity of undecanal-modified chitosan (UCS) was fabricated through physical electrostatic cross-linking and freeze-drying. The as-prepared hydrogel sponges showed a porous structure suitable for blood cell adhesion. In particular, the hydrogel exhibited excellent antibacterial ability and promoted the adhesion of platelets and red blood cells, thus inducing a prominent pro-coagulation ability via platelet activation, which exhibits a shorter hemostasis time (58.94% of control) in vitro. Compared with commercially available CELOX and gelatin sponge (GS), HA-ADP/UCS accelerates hemostasis and reduces blood loss in both rat tail amputation and rat artery injury models. Furthermore, all the samples exhibited su-perior cytocompatibility and biodegradability. Due to these performances, HA-ADP/UCS promoted full-thickness skin defect healing significantly in vivo. All the properties of HA-ADP/UCS suggest that it has great potential for translation as a clinical application material for hemostatic and wound healing. | Yihao Liu Haoyi Niu Chengwei Wang Xiaoxiao Yang Wentao Li Yuxin Zhang Xiaojun Ma Yuanjing Xu Pengfei Zheng Jinwu Wang Kerong Dai | 2022 | Bioactive Materials2022，7，11： | 1 |
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