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Chen J, Li S, Jiao Y, Li J, Li Y, Hao YL, Zuo Y. In Vitro Study on the Piezodynamic Therapy with a BaTiO 3-Coating Titanium Scaffold under Low-Intensity Pulsed Ultrasound Stimulation. ACS Appl Mater Interfaces 2021; 13:49542-49555. [PMID: 34610736 DOI: 10.1021/acsami.1c15611] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
To solve the poor sustainability of electroactive stimulation in clinical therapy, a strategy of combining a piezoelectric BaTiO3-coated Ti6Al4V scaffold and low-intensity pulsed ultrasound (LIPUS) was unveiled and named here as piezodynamic therapy. Thus, cell behavior could be regulated phenomenally by force and electricity simultaneously. First, BaTiO3 was deposited uniformly on the surface of the three-dimensional (3D) printed porous Ti6Al4V scaffold, which endowed the scaffold with excellent force-electricity responsiveness under pulsed ultrasound exposure. The results of live/dead staining, cell scanning electron microscopy, and F-actin staining showed that cells had better viability, better pseudo-foot adhesion, and more muscular actin bundles when they underwent the piezodynamic effect of ultrasound and piezoelectric coating. This piezodynamic therapy activated more mitochondria at the initial stage that intervened in the cell cycle by promoting cells' proliferation and weakened the apoptotic damage. The quantitative real-time polymerase chain reaction data further confirmed that the costimulation of the ultrasound and the piezoelectric scaffolds could trigger adequate current to upregulated the expression of osteogenic-related genes. The continuous electric cues could be generated by the BaTiO3-coated scaffold and intermittent LIPUS stimulation; thereon, more efficient bone healing would be promoted by piezodynamic therapy in future treatment.
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Affiliation(s)
- Jie Chen
- Research Center for Nano Biomaterials, and Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
| | - Shujun Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People's Republic of China
| | - Yilai Jiao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People's Republic of China
| | - Jidong Li
- Research Center for Nano Biomaterials, and Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
| | - Yubao Li
- Research Center for Nano Biomaterials, and Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
| | - Yu-Lin Hao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People's Republic of China
| | - Yi Zuo
- Research Center for Nano Biomaterials, and Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
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Shi YZ, Xiong S, Zhang Y, Chin LK, Chen YY, Zhang JB, Zhang TH, Ser W, Larsson A, Lim SH, Wu JH, Chen TN, Yang ZC, Hao YL, Liedberg B, Yap PH, Wang K, Tsai DP, Qiu CW, Liu AQ. Author Correction: Sculpting nanoparticle dynamics for single-bacteria-level screening and direct binding-efficiency measurement. Nat Commun 2019; 10:1227. [PMID: 30862795 PMCID: PMC6414671 DOI: 10.1038/s41467-019-09171-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Y Z Shi
- School of Mechanical Engineering, Xi'an Jiaotong University, 710049, Xi'an, China.,School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - S Xiong
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
| | - Y Zhang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - L K Chin
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Y-Y Chen
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - J B Zhang
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - T H Zhang
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117583, Singapore
| | - W Ser
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - A Larsson
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - S H Lim
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - J H Wu
- School of Mechanical Engineering, Xi'an Jiaotong University, 710049, Xi'an, China
| | - T N Chen
- School of Mechanical Engineering, Xi'an Jiaotong University, 710049, Xi'an, China
| | - Z C Yang
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, 100871, Beijing, China
| | - Y L Hao
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, 100871, Beijing, China
| | - B Liedberg
- Centre for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - P H Yap
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - K Wang
- College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan.,Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore
| | - D P Tsai
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - C-W Qiu
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117583, Singapore. .,SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen University, 518060, Shenzhen, China.
| | - A Q Liu
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore. .,National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, 100871, Beijing, China.
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Tang SY, Hao YL, Zeng X, Chen QM. [The state-of-the-art development in research on oral mucositis induced by chemotherapy]. Zhonghua Kou Qiang Yi Xue Za Zhi 2018; 53:566-571. [PMID: 30078274 DOI: 10.3760/cma.j.issn.1002-0098.2018.08.015] [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: 02/05/2023]
Abstract
Chemotherapy is one of the effective methods to treat cancer. However, the chemotherapy agents may cause a series of adverse reactions due to the nonselective characteristics that affect not only tumor cells, but also normal cells. Oral mucositis induced by chemotherapy is a common oral complication caused by chemotherapy in clinic. It brings great suffering to the patients and also interferes with the procedure of chemotherapy. Because of its high incidence in patients receiving chemotherapy and the significant influence, there are more researches on oral mucositis induced by chemotherapy which let us have further understanding of it. This review article will introduce the pathogenesis, risk factors, clinical manifestations, assessments, treatment and prevention of oral mucositis induced by chemotherapy.
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Affiliation(s)
- S Y Tang
- Department of Oral Medicine, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - Y L Hao
- Department of Oral Medicine, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - X Zeng
- Department of Oral Medicine, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - Q M Chen
- Department of Oral Medicine, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
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Liu CF, Lee TH, Liu JF, Hou WT, Li SJ, Hao YL, Pan H, Huang HH. A unique hybrid-structured surface produced by rapid electrochemical anodization enhances bio-corrosion resistance and bone cell responses of β-type Ti-24Nb-4Zr-8Sn alloy. Sci Rep 2018; 8:6623. [PMID: 29700340 PMCID: PMC5920132 DOI: 10.1038/s41598-018-24590-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 04/05/2018] [Indexed: 12/13/2022] Open
Abstract
Ti-24Nb-4Zr-8Sn (Ti2448), a new β-type Ti alloy, consists of nontoxic elements and exhibits a low uniaxial tensile elastic modulus of approximately 45 GPa for biomedical implant applications. Nevertheless, the bio-corrosion resistance and biocompatibility of Ti2448 alloys must be improved for long-term clinical use. In this study, a rapid electrochemical anodization treatment was used on Ti2448 alloys to enhance the bio-corrosion resistance and bone cell responses by altering the surface characteristics. The proposed anodization process produces a unique hybrid oxide layer (thickness 50-120 nm) comprising a mesoporous outer section and a dense inner section. Experiment results show that the dense inner section enhances the bio-corrosion resistance. Moreover, the mesoporous surface topography, which is on a similar scale as various biological species, improves the wettability, protein adsorption, focal adhesion complex formation and bone cell differentiation. Outside-in signals can be triggered through the interaction of integrins with the mesoporous topography to form the focal adhesion complex and to further induce osteogenic differentiation pathway. These results demonstrate that the proposed electrochemical anodization process for Ti2448 alloys with a low uniaxial tensile elastic modulus has the potential for biomedical implant applications.
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Affiliation(s)
- Chia-Fei Liu
- Institute of Oral Biology, National Yang-Ming University, Taipei, Taiwan
| | - Tzu-Hsin Lee
- Department of Dentistry, Changhua Christian Hospital, Changhua, Taiwan
| | - Jeng-Fen Liu
- Department of Stomatology, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Wen-Tao Hou
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
| | - Shu-Jun Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
| | - Yu-Lin Hao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
| | - Haobo Pan
- Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Her-Hsiung Huang
- Institute of Oral Biology, National Yang-Ming University, Taipei, Taiwan. .,Department of Dentistry, National Yang-Ming University, Taipei, Taiwan. .,Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan. .,Department of Medical Research, China Medical University Hospital, Taichung, Taiwan. .,Department of Bioinformatics and Medical Engineering, Asia University, Taichung, Taiwan. .,Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan. .,Department of Education and Research, Taipei City Hospital, Taipei, Taiwan.
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Hou YL, Zhang H, Hao YL, Yang YX, Li HX. [Clinicopathological analysis of 98 cases of benign lymphoidenosis of oral mucosa]. Zhonghua Kou Qiang Yi Xue Za Zhi 2018; 53:191-194. [PMID: 29972978 DOI: 10.3760/cma.j.issn.1002-0098.2018.03.010] [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 investigate the clinical manifestations and pathological changes of benign lymphoadenosis of oral mucosa. Methods: The clinical data of 98 cases of benign lymphoadenosis of oral mucosa were analyzed. Results: The clinical manifestations of benign lymphoadenosis of oral mucosa included erosive ulcer (64%) and nodule (9%) and the rate of misdiagnosis was 98%. Neutrophil infiltration occurred in the epithelium of 51% cases and the lymphocyte was diffusely infiltrated in lamina propria of 83% cases. Conclusions: When the mucous membrane of the lamina propria is characterized by complex cell components, diffuse infiltrating lymphocytes and infiltration of neutrophils in mucosal epithelium without erosion and ulceration, it is necessary to highly suspect benign lymphoadenosis of oral mucosa. Finding the focal aggregation of lymphoid follicles or lymphocytes is helpful for the correct diagnosis.
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Affiliation(s)
- Y L Hou
- Department of Oral Pathology, College of Stomatology, Hebei Medical University & Key Laboratory of Stomatology, Shijiazhuang 050017, China
| | - H Zhang
- Department of Oral and Maxillofacial Surgery, College of Stomatology, Hebei Medical University & Key Laboratory of Stomatology, Shijiazhuang 050017, China
| | - Y L Hao
- Department of Oral Pathology, College of Stomatology, Hebei Medical University & Key Laboratory of Stomatology, Shijiazhuang 050017, China
| | - Y X Yang
- Department of Oral Pathology, College of Stomatology, Hebei Medical University & Key Laboratory of Stomatology, Shijiazhuang 050017, China
| | - H X Li
- Department of Oral Pathology, College of Stomatology, Hebei Medical University & Key Laboratory of Stomatology, Shijiazhuang 050017, China
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Shi YZ, Xiong S, Zhang Y, Chin LK, Chen YY, Zhang JB, Zhang TH, Ser W, Larrson A, Lim SH, Wu JH, Chen TN, Yang ZC, Hao YL, Liedberg B, Yap PH, Wang K, Tsai DP, Qiu CW, Liu AQ. Sculpting nanoparticle dynamics for single-bacteria-level screening and direct binding-efficiency measurement. Nat Commun 2018; 9:815. [PMID: 29483548 PMCID: PMC5827716 DOI: 10.1038/s41467-018-03156-5] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 01/24/2018] [Indexed: 01/21/2023] Open
Abstract
Particle trapping and binding in optical potential wells provide a versatile platform for various biomedical applications. However, implementation systems to study multi-particle contact interactions in an optical lattice remain rare. By configuring an optofluidic lattice, we demonstrate the precise control of particle interactions and functions such as controlling aggregation and multi-hopping. The mean residence time of a single particle is found considerably reduced from 7 s, as predicted by Kramer’s theory, to 0.6 s, owing to the mechanical interactions among aggregated particles. The optofluidic lattice also enables single-bacteria-level screening of biological binding agents such as antibodies through particle-enabled bacteria hopping. The binding efficiency of antibodies could be determined directly, selectively, quantitatively and efficiently. This work enriches the fundamental mechanisms of particle kinetics and offers new possibilities for probing and utilising unprecedented biomolecule interactions at single-bacteria level. Optical trapping is a versatile tool for biomedical applications. Here, the authors use an optofluidic lattice to achieve controllable multi-particle hopping and demonstrate single-bacteria-level screening and measurement of binding efficiency of biological binding agents through particle-enabled bacteria hopping.
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Affiliation(s)
- Y Z Shi
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.,School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - S Xiong
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
| | - Y Zhang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - L K Chin
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Y -Y Chen
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - J B Zhang
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - T H Zhang
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117583, Singapore
| | - W Ser
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - A Larrson
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - S H Lim
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - J H Wu
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - T N Chen
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Z C Yang
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, Beijing, 100871, China
| | - Y L Hao
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, Beijing, 100871, China
| | - B Liedberg
- Centre for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - P H Yap
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - K Wang
- College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan.,Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore
| | - D P Tsai
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - C-W Qiu
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117583, Singapore. .,SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen University, Shenzhen, 518060, China.
| | - A Q Liu
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore. .,National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, Beijing, 100871, China.
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Nune KC, Misra RDK, Gai X, Li SJ, Hao YL. Surface nanotopography-induced favorable modulation of bioactivity and osteoconductive potential of anodized 3D printed Ti-6Al-4V alloy mesh structure. J Biomater Appl 2017; 32:1032-1048. [DOI: 10.1177/0885328217748860] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The objective of the study described here is to fundamentally elucidate the biological response of 3D printed Ti-6Al-4V alloy mesh structures that were surface modified to introduce titania nanotubes with an average pore size of ∼80 nm via an electrochemical anodization process from the perspective of enhancing bioactivity. The bioactivity of the mesh structures were analyzed through immersion test in simulated body fluid, which confirmed the nucleation and growth of fine globular nanoscale apatite on the nanoporous titania-modified (anodized) mesh structure surface, and agglomerated apatite with fine flakes of apatite crystals on as-fabricated mesh structure surface, that were rich in calcium and phosphorous. The cellular activity of bioactive anodized mesh structure was explored in terms of cell–material interactions involving adhesion, proliferation, synthesis of extracellular and intracellular proteins, differentiation, and mineralization. Cells adhered with a sheet-like morphology on as-fabricated mesh structure, whereas, on anodized mesh structure, numerous filopodia-like cellular extensions interacting with nanotube pores were observed. The formation of a bioactive nanoscale apatite, cell–nanotube interactions as imaged via electron microscopy, higher expression of proteins (actin, vinculin, fibronectin, and alkaline phosphatase (ALP)), and calcium content points toward the determining role of anodized mesh structure in modulating osteoblasts functions. The unique combination of nanoporous bioactive titania and interconnected porous architecture of anodized titanium alloy mesh structure provided a multimodal roughness surface ranging from nano to micro to macroscale, which helps in attaining strong primary and secondary fixation of the implant device along with the pathway for supply of nutrients and oxygen to cells and tissue.
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Affiliation(s)
- KC Nune
- Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, El Paso, TX, USA
| | - RDK Misra
- Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, El Paso, TX, USA
| | - X Gai
- Shenyang National Laboratory for Materials Science, Institute of Metals Research, Chinese Academy of Sciences, Shenyang, China
| | - SJ Li
- Shenyang National Laboratory for Materials Science, Institute of Metals Research, Chinese Academy of Sciences, Shenyang, China
| | - YL Hao
- Shenyang National Laboratory for Materials Science, Institute of Metals Research, Chinese Academy of Sciences, Shenyang, China
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Shi YZ, Xiong S, Chin LK, Yang Y, Zhang JB, Ser W, Wu JH, Chen TN, Yang ZC, Hao YL, Liedberg B, Yap PH, Zhang Y, Liu AQ. High-resolution and multi-range particle separation by microscopic vibration in an optofluidic chip. Lab Chip 2017. [PMID: 28634603 DOI: 10.1039/c7lc00484b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
An optofluidic chip is demonstrated in experiments for high-resolution and multi-range particle separation through the optically-induced microscopic vibration effect, where nanoparticles are trapped in loosely overdamped optical potential wells created with combined optical and fluidic constraints. It is the first demonstration of separating single nanoparticles with diameters ranging from 60 to 100 nm with a resolution of 10 nm. Nanoparticles vibrate with an amplitude of 3-7 μm in the loosely overdamped potential wells in the microchannel. The proposed optofluidic device is capable of high-resolution particle separation at both nanoscale and microscale without reconfiguring the device. The separation of bacteria from other larger cells is accomplished using the same chip and operation conditions. The unique trapping mechanism and the superb performance in high-resolution and multi-range particle separation of the proposed optofluidic chip promise great potential for a diverse range of biomedical applications.
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Affiliation(s)
- Y Z Shi
- School of Mechanical Engineering, Xi'an Jiao Tong University, Xian 710049, China
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Nune KC, Misra RDK, Li SJ, Hao YL, Zhang W. The functional response of bioactive titania-modified three-dimensional Ti-6Al-4V mesh structure toward providing a favorable pathway for intercellular communication and osteoincorporation. J Biomed Mater Res A 2016; 104:2488-501. [PMID: 27225062 DOI: 10.1002/jbm.a.35789] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [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: 03/22/2016] [Accepted: 05/18/2016] [Indexed: 12/14/2022]
Abstract
The objective of the study is to fundamentally elucidate the biological response of 3D printed mesh structures subjected to plasma electrolytic oxidation process through the study of osteoblast functions. The cellular activity of plasma electrolytic-oxidized mesh structure was explored in terms of cell-to-cell communication involving proliferation, synthesis of extracellular and intracellular proteins, and mineralization. Upon plasma electrolytic oxidation of the mesh structure, a thin layer of bioactive titania with pore size 1-3 µm was nucleated on the surface. The combination of microporous bioactive titania and interconnected porous architecture provided the desired pathway for supply of nutrients and oxygen to cells and tissue and a favorable osteogenic microenvironment for tissue on-growth and in-growth, in relation to the unmodified mesh structure. The formation of a confluent layer as envisaged via electron microscopy and quantitative assessment of the expression level of proteins (actin, vinculin, and fibronectin) point toward the determining role of surface-modified mesh structure in modulating osteoblasts functions. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 2488-2501, 2016.
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Affiliation(s)
- K C Nune
- Biomaterials and Biomedical Engineering Research Laboratory, Department of Metallurgical, Materials and Biomedical Engineering, The University of Texas at El Paso, 500 W. University Avenue, El Paso, Texas, 79968
| | - R D K Misra
- Biomaterials and Biomedical Engineering Research Laboratory, Department of Metallurgical, Materials and Biomedical Engineering, The University of Texas at El Paso, 500 W. University Avenue, El Paso, Texas, 79968
| | - S J Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Y L Hao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - W Zhang
- Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
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10
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Xiang H, Zhang J, Hao YL, Fan J, Li FY, Wang LL, Ding LQ, Zhang X, Kuang XH, Gao XL. [The pathogenic gene screening in a cardiomyopathy pedigree of Yunnan province]. Zhonghua Xin Xue Guan Bing Za Zhi 2016; 44:416-420. [PMID: 27220577 DOI: 10.3760/cma.j.issn.0253-3758.2016.05.010] [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: 06/05/2023]
Abstract
OBJECTIVE In this study, the sreening of candidate pathogenic gene is done among family members of an dilated cardiomyopathy(DCM)and hypertrophic cardiomyopathy (HCM) coexistence, and find the relationship between the genotype and the phenotype. METHODS The inheritance atlas was drawn, analysis of genetic characteristics and clinical phenotype.Peripheral venous blood samples of proband and family members were candidated gene exon high-throughput sequencing sub target capture, make the result compares with related database, ultimately screening the target area of the exon and mutations of candidate genes and then using bidirectional sequencing of Sanger to sequence other family members and the health group which were matching with gender and age to testify whether there is the above mutations. RESULTS In this family, the proband and his father carry three missense mutations, about TTNc.604 A>G(p.Lys202Glu)、TAZ c. 580A>G(p.Ile194Val)and MYH7c.730 T>C(p.Phe244Leu). The heart function of proband was failure, and accompanied malignant arrhythmia.But his father has no obvious clinical symptoms.In this family, the same genetic mutation of disease causing gene lead to different clinical phenotype, but different genetic mutation of disease causing gene lead to the same clinical phenotype.None of the mutations found in this family was found in the health group. CONCLUSION The patient of this family carries the genetic mutation of MYH7, TTN and TAZ.The patient of this family carries the composite mutation of MYH7(+) /TTN(+) heterozygous missense mutation and TAZ(+) /TTN(+) heterozygous missense mutation may be show the performance of the genetic characteristics of early onset, severe phenotype.
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Affiliation(s)
- H Xiang
- Department of Cardiology, Frist People's Hospital of Yunnan Province, Kunming 650032, China
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Abstract
We describe here the combined efforts of engineering and biological sciences as a systemic approach to fundamentally elucidate osteoblast functions in functionally graded Ti-6Al-4 V mesh structures in relation to uniform/monolithic mesh arrays. First, the interconnecting porous architecture of functionally graded mesh arrays was conducive to cellular functions including attachment, proliferation, and mineralization. The underlying reason is that the graded fabricated structure with cells seeded from the large pore size side provided a channel for efficient transfer of nutrients to other end of the structure (small pore size), leading to the generation of mineralized extracellular matrix by differentiating pre-osteoblasts. Second, a comparative and parametric study indicated that gradient mesh structure had a pronounced effect on cell adhesion and mineralization, and strongly influenced the proliferation phase. High intensity and near-uniform distribution of proteins (actin and vinculin) on struts of the gradient mesh structure (cells seeded from large pore side) implied signal transduction during cell adhesion and was responsible for superior cellular activity, in comparison to the uniform mesh structure and non-porous titanium alloy. Cells adhered to the mesh struts by forming a sheet, bridging the pores through numerous cytoplasmic extensions, in the case of porous mesh structures. Intercellular interaction in porous structures provided a pathway for cells to communicate and mature to a differentiated phenotype. Furthermore, the capability of cells to migrate through the interconnecting porous architecture on mesh structures led to colonization of the entire structure. Cells were embedded layer-by-layer in the extracellular matrix as the matrix mineralized. The outcomes of the study are expected to address challenges associated with the treatment of segmental bone defects and bone-remodeling through favorable modulation of cellular response. Moreover, the study provides a foundation for a new branch of functionally graded materials with interconnected porous architecture.
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Affiliation(s)
- K C Nune
- Biomedical Engineering The University of Texas at El Paso, 500 W. University Avenue, El Paso, Texas, USA
| | - A Kumar
- Biomedical Engineering The University of Texas at El Paso, 500 W. University Avenue, El Paso, Texas, USA
| | - R D K Misra
- Biomedical Engineering The University of Texas at El Paso, 500 W. University Avenue, El Paso, Texas, USA
| | - S J Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, China
| | - Y L Hao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, China
| | - R Yang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, China
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Ren J, Hou XY, Ma SH, Zhang FK, Zhen JH, Sun L, Sun YX, Hao YL, Cheng YF, Hou M, Xu CG, Zhang MH, Peng J. Elevated expression of CX3C chemokine receptor 1 mediates recruitment of T cells into bone marrow of patients with acquired aplastic anaemia. J Intern Med 2014; 276:512-24. [PMID: 24528288 DOI: 10.1111/joim.12218] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [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: 12/30/2022]
Abstract
OBJECTIVE Acquired aplastic anaemia (AA) is a T-cell-mediated, organ-specific autoimmune disease characterized by haematopoietic stem cell destruction in the bone marrow. The exact molecular mechanism of T-cell trafficking into the bone marrow is unclear in AA. Very late activation antigen-4 (VLA-4) and CX3C chemokine receptor 1 (CX3CR1) play active roles in many autoimmune diseases. Therefore, we investigated whether VLA-4 and CX3CR1 also contribute to T-cell migration into the bone marrow in acquired AA. DESIGN, SETTING AND SUBJECTS Expression levels of CX3CR1 and VLA-4 and their ligands [fractalkine (CX3CL1) and vascular cell adhesion molecule-1 (VCAM-1)] were examined in 63 patients with AA and 21 healthy control subjects. T-cell chemotaxis and adhesion were analysed in 17 patients with severe AA. We also prospectively evaluated the expression pattern of CX3CR1 during treatment with antithymocyte globulin plus cyclosporine in 11 patients with severe AA. RESULTS The proportion of peripheral and bone marrow CD4(+) and CD8(+) T cells expressing CX3CR1 and the level of CX3CL1 was increased in patients with AA. However, there was no significant difference in VLA-4 expression or VCAM-1 levels. Functional studies demonstrated that chemotaxis towards autologous bone marrow plasma or soluble CX3CL1 was significantly higher in T cells from AA patients and could be blocked by CX3CR1 inhibitors. CX3CR1-mediated T-cell adhesion was also upregulated in these patients. The expression of CX3CR1 was associated with the efficacy of immunosuppressive therapy. CONCLUSION The present findings demonstrate that CX3CR1 plays a pivotal role in recruitment of T cells into the bone marrow in acquired AA and is a potential therapeutic target for treatment of this disorder.
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Affiliation(s)
- J Ren
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, China; Department of Hematology, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
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13
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Hao YL, Zhang B, Jia FJ, Li XL, Tang Y, Ren YZ, Liu WH. A three-phase epidemiological study of short and long sleepers in a middle-aged Chinese population: prevalence and characteristics. Braz J Med Biol Res 2014; 47:157-65. [PMID: 24519132 PMCID: PMC4051176 DOI: 10.1590/1414-431x20133430] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 10/29/2013] [Indexed: 11/24/2022] Open
Abstract
Epidemiological studies of short and long sleepers have not been conducted
previously. We collected socioeconomic, psychological, and polysomnographic
characteristics of 6501 parents (3252 men and 3249 women) of 4036 primary school
children in Guangzhou city. The study data were collected in three phases. The
overall prevalence of short (5 h or less) and long (10 h or more) sleep duration
was 0.52 and 0.64%, respectively. Long sleepers had higher Eysenck Personality
Questionnaire neuroticism scores [odds ratio (OR)=1.224, 95% confidence interval
(CI)=1.047-1.409] and lower education levels (OR=0.740, 95%CI=0.631-0.849) than
short sleepers. In the polysomnographic assessment, short, long, and normal
sleepers (7-8 h) shared similar durations of Stage 3 sleep (short=25.7±10.7,
long=20.3±7.9, and normal=28.0±12.8 min, F=1.402, P=0.181). In daytime multiple
sleep latency tests, short sleepers (10/19, 52.6%) were more prone to have a
short sleep latency (≤8 min) than long sleepers (2/23, 8.7%). In addition to
different sleep durations, neuroticism might also contribute to differences
between short and long sleepers in social achievements. Stage 3 sleep might be
essential for humans. The short sleep latency (≤8 min) of short sleepers in
multiple sleep latency tests should be interpreted cautiously, since it was of
the same severity as required for a diagnosis of narcolepsy or idiopathic
hypersomnia.
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Affiliation(s)
- Y L Hao
- Department of Human Anatomy, Guangzhou Medical University, Guangzhou, China, Department of Human Anatomy, Guangzhou Medical University, Guangzhou, China
| | - B Zhang
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Mental Health Centre, Guangzhou, China, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Mental Health Centre, Guangzhou, China
| | - F J Jia
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Mental Health Centre, Guangzhou, China, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Mental Health Centre, Guangzhou, China
| | - X L Li
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Mental Health Centre, Guangzhou, China, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Mental Health Centre, Guangzhou, China
| | - Y Tang
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Mental Health Centre, Guangzhou, China, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Mental Health Centre, Guangzhou, China
| | - Y Z Ren
- Zhongshan The Third People's Hospital, Zhongshan, China, Zhongshan The Third People's Hospital, Zhongshan, China
| | - W H Liu
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Mental Health Centre, Guangzhou, China, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Mental Health Centre, Guangzhou, China
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14
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Wu SH, Li Y, Zhang YQ, Li XK, Yuan CF, Hao YL, Zhang ZY, Guo Z. Porous Titanium-6 Aluminum-4 Vanadium Cage Has Better Osseointegration and Less Micromotion Than a Poly-Ether-Ether-Ketone Cage in Sheep Vertebral Fusion. Artif Organs 2013; 37:E191-201. [PMID: 24147953 DOI: 10.1111/aor.12153] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Su-Hua Wu
- Department of Orthopedics; Xijing Hospital; The Fourth Military Medical University; Xi'an China
| | - Yi Li
- Department of Orthopedics; Xijing Hospital; The Fourth Military Medical University; Xi'an China
| | - Yong-Quan Zhang
- Department of Orthopedics; Xijing Hospital; The Fourth Military Medical University; Xi'an China
| | - Xiao-Kang Li
- Department of Orthopedics; Xijing Hospital; The Fourth Military Medical University; Xi'an China
| | - Chao-Fan Yuan
- Department of Orthopedics; Xijing Hospital; The Fourth Military Medical University; Xi'an China
| | - Yu-Lin Hao
- Institute of Metal Research of Chinese Academy of Science; Shenyang China
| | - Zhi-Yong Zhang
- National Tissue Engineering Center of China; Shanghai China
| | - Zheng Guo
- Department of Orthopedics; Xijing Hospital; The Fourth Military Medical University; Xi'an China
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15
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Liu JP, Wang YD, Hao YL, Wang Y, Nie ZH, Wang D, Ren Y, Lu ZP, Wang J, Wang H, Hui X, Lu N, Kim MJ, Yang R. New intrinsic mechanism on gum-like superelasticity of multifunctional alloys. Sci Rep 2013; 3:2156. [PMID: 23831664 PMCID: PMC3703606 DOI: 10.1038/srep02156] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 06/11/2013] [Indexed: 11/25/2022] Open
Abstract
Ti-Nb-based Gum Metals exhibit extraordinary superelasticity with ultralow elastic modulus, superior strength and ductility, and a peculiar dislocation-free deformation behavior, most of which challenge existing theories of crystal strength. Additionally, this kind of alloys actually displays even more anomalous mechanical properties, such as the non-linear superelastic behavior, accompanied by a pronounced tension-to-compression asymmetry, and large ductility with a low Poisson's ratio. Two main contradictory arguments exist concerning the deformation mechanisms of those alloys, i.e., formation of reversible nanodisturbance and reversible martensitic transformation. Herein we used the in-situ synchrotron high-energy X-ray scattering technique to reveal the novel intrinsic physical origin of all anomalous mechanical properties of the Ti-24Nb-4Zr-8Sn-0.10O alloy, a typical gum-like metal. Our experiments provide direct evidence on two different kinds of interesting, stress-induced, reversible nanoscale martensitic transitions, i.e., the austenitic regions with B2 structure transform to α″ martensite and those with BCC structure transform to δ martensite.
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Affiliation(s)
- Jia-Peng Liu
- State Key Laboratory for Advanced Metals and Materials, University of Science and Technology, Beijing 100083, P. R. China
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16
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Hao YL, Djotyan AP, Avetisyan AA, Peeters FM. D- shallow donor near a semiconductor-metal and a semiconductor-dielectric interface. J Phys Condens Matter 2011; 23:115303. [PMID: 21368366 DOI: 10.1088/0953-8984/23/11/115303] [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] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The ground state energy and the extent of the wavefunction of a negatively charged donor (D(-)) located near a semiconductor-metal or a semiconductor-dielectric interface are obtained. We apply the effective mass approximation and use a variational two-electron wavefunction that takes into account the influence of all image charges that arise due to the presence of the interface, as well as the correlation between the two electrons bound to the donor. For a semiconductor-metal interface, the D(-) binding energy is enhanced for donor positions d > 1.5a(B) (a(B) is the effective Bohr radius) due to the additional attraction of the electrons with their images. When the donor approaches the interface (i.e. d < 1.5a(B)) the D(-) binding energy drops and eventually it becomes unbound. For a semiconductor-dielectric (or a semiconductor-vacuum) interface the D(-) binding energy is reduced for any donor position as compared to the bulk case and the system becomes rapidly unbound when the donor approaches the interface.
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Affiliation(s)
- Y L Hao
- Department of Physics, University of Antwerpen, Antwerpen, Belgium
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17
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Zhang B, Hao YL, Jia FJ, Shan ZX, Wang SX, Wing YK. Fatal familial insomnia: a middle-age-onset Chinese family kindred. Sleep Med 2010; 11:498-9. [PMID: 20133192 DOI: 10.1016/j.sleep.2009.11.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2009] [Revised: 11/17/2009] [Accepted: 11/23/2009] [Indexed: 11/16/2022]
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18
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Cui JP, Hao YL, Li SJ, Sui ML, Li DX, Yang R. Reversible movement of homogenously nucleated dislocations in a beta-titanium alloy. Phys Rev Lett 2009; 102:045503. [PMID: 19257440 DOI: 10.1103/physrevlett.102.045503] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Indexed: 05/27/2023]
Abstract
We demonstrate reversible movement of 1/2[11[over ]0](110) dislocation loops generated from nanodisturbances in a beta-titanium alloy. High resolution transmission electron microscope observations during an in situ tensile test found three reversible deformation mechanisms, nanodisturbances, dislocation loops and martensitic transformation, that are triggered in turn with increasing applied stress. All three mechanisms contribute to the nonlinear elasticity of the alloy. The experiments also revealed the evolution of the dislocation loops to disclination dipoles that cause severe local lattice rotations.
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Affiliation(s)
- J P Cui
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
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19
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Hao AJ, Deng YJ, Li TF, Suo XB, Cao YH, Hao YL, Zhang Y. Degradation Kinetics of Fluorouracil-Acetic-Acid-Dextran Conjugate in Aqueous Solution. Drug Dev Ind Pharm 2008; 32:757-63. [PMID: 16885130 DOI: 10.1080/03639040600683436] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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: 12/19/2022]
Abstract
The degradation kinetics of fluorouracil-acetic-acid-dextran conjugate (FUAC-dextran) was investigated in various buffer solutions with different pH value and physiological saline solution at 60 degrees C and 37 degrees C, respectively. The hydrolytic reaction displayed pseudo-first-order degradation kinetics. Hydrolytic rate constant obtained was the function of pH value and independent of species of buffering agents. The smallest rate constant was observed at pH round 3.00. The activation energy of the hydrolytic reaction was estimated from Arrhenius equation as 88.73 +/- 6.00 kJ.mol-1. The special base catalytic degradation of the conjugate was observed from acidic to slight alkaline condition and the special base catalytic rate constants were calculated. The conjugate was more stable in physiological saline than that in buffer solution at pH 7.00 or 9.00 at 37 degrees C. The results revealed that the conjugate was stable in acidic condition and will degrade in alkaline condition.
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Affiliation(s)
- A J Hao
- Shenyang Pharmaceutical University, Shenyang City, Liaoning Province, P.R. China
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20
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Abstract
We report a ductile beta-type titanium alloy with body-centered cubic (bcc) crystal structure having a low Poisson's ratio of 0.14. The almost identical ultralow bulk and shear moduli of approximately 24 GPa combined with an ultrahigh strength of approximately 0.9 GPa contribute to easy crystal distortion due to much-weakened chemical bonding of atoms in the crystal, leading to significant elastic softening in tension and elastic hardening in compression. The peculiar elastic and plastic deformation behaviors of the alloy are interpreted as a result of approaching the elastic limit of the bcc crystal under applied stress.
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Affiliation(s)
- Y L Hao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.
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21
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Hao YL, Li SJ, Sun SY, Zheng CY, Yang R. Elastic deformation behaviour of Ti-24Nb-4Zr-7.9Sn for biomedical applications. Acta Biomater 2007; 3:277-86. [PMID: 17234466 DOI: 10.1016/j.actbio.2006.11.002] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2006] [Revised: 11/02/2006] [Accepted: 11/07/2006] [Indexed: 11/25/2022]
Abstract
In this paper, the elastic deformation behaviour of a recently developed beta-type titanium alloy Ti-24Nb-4Zr-7.9Sn (wt.%) that consists of non-toxic elements and is intended for biomedical applications is described. Tensile tests show that this alloy in the as hot-rolled state exhibits peculiar non-linear elastic behaviour with maximum recoverable strain up to 3.3% and incipient Young's modulus of 42GPa. Solution treatment at high temperature has trivial effect on super-elasticity but decreases strength and slightly increases the incipient Young's modulus. Ageing treatment in the (alpha+beta) two-phase field increases both strength and Young's modulus and results in a combination of high strength and relatively low elastic modulus. In spite of the formation of the alpha phase, short time ageing has no effect on super-elasticity, whereas the non-linear elastic behaviour transforms gradually to normal linear elasticity with the increase of ageing time. We suggest sluggish, partially reversible processes of stress-induced phase transformation and/or incipient kink bands as the origin of the above peculiar elastic behaviour.
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Affiliation(s)
- Y L Hao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.
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22
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Chen Y, Deng YJ, Hao YL, Hao AJ, Zhong HJ, Wang XM. Uptake of liposomes by cultured cardiomyocytes. Pharmazie 2005; 60:844-8. [PMID: 16320947] [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: 05/05/2023]
Abstract
Small unilamellar liposomes (SUV) of different phospholipid/polymer composition were labeled with NBD-PC, which served as a bilayersituated fluorescence marker. Neonatal cardiomyocytes were incubated with liposomes and then the cell-associated fluorescence was measured. The factors influencing the liposome uptake by cardiomyocytes such as concentration of lipid, time of incubation, membrane fluidity of liposomes, charge lipid/polymer modification of liposomes and anoxia of cultured cardiomyocytes were investigated. The liposome uptake by cardiomyocytes increased dose-dependently and time-dependently. Liposome uptake was strongly influenced by the electrical charge and modified polymer. After 2 h incubation, the uptake of positively charged liposomes was 1.7-fold higher than that of negatively charged one and both higher than that of the neutral one. The presence of PE-PEG2000 distinctly reduced the liposome uptake and the difference between the uptake of charged and neutral liposome. Anoxia increased the uptake of liposome at the first hour (increased 20%), but after 2 h incubation the liposome uptake by hypoxia cellswas less than that of normoxia cells (decreased 18%). Mechanisms involved are also discussed.
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Affiliation(s)
- Y Chen
- Department of Pharmaceutical Sciences, Shenyang Pharmaceutical University, Liaoning, P.R. China.
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23
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Li Y, Jiang HL, Zhu KJ, Liu JH, Hao YL. Preparation, characterization and nasal delivery of alpha-cobrotoxin-loaded poly(lactide-co-glycolide)/polyanhydride microspheres. J Control Release 2005; 108:10-20. [PMID: 16125269 DOI: 10.1016/j.jconrel.2005.07.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2004] [Revised: 03/26/2005] [Accepted: 07/12/2005] [Indexed: 10/25/2022]
Abstract
In this study, alpha-cobrotoxin was incorporated into the microspheres composed of poly(lactide-co-glycolide) (PLGA) and poly[1,3-bis(p-carboxy-phenoxy) propane-co-p-(carboxyethylformamido) benzoic anhydride] (P(CPP:CEFB)) and intranasally delivered to model rats in order to improve its analgesic activity. The microspheres with high entrapment efficiency (>80%) and average diameter of about 25 microm could be prepared by a modified water-in-oil-in-oil (w/o/o) emulsion solvent evaporation method. Scanning electron micrograph (SEM) study indicated that P(CPP:CEFB) content played a considerable role on the morphology and degradation of the microspheres. The presence of P(CPP:CEFB) in the microspheres increased their residence time at the surface of the nasal rat mucosa. The toxicity of the composite microspheres to nasal mucosa was proved to be mild and reversible. A tail flick assay was used to evaluate the antinociceptive activity of the microspheres after nasal administration. Compared with the free alpha-cobrotoxin and PLGA microspheres, PLGA/P(CPP:CEFB) microspheres showed an apparent increase in the strength and duration of the antinociceptive effect at the same dose of alpha-cobrotoxin (80 microg/kg body weight).
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Affiliation(s)
- Y Li
- Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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24
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Li Y, Zhu KJ, Zhang JX, Jiang HL, Liu JH, Hao YL, Yasuda H, Ichimaru A, Yamamoto K. In vitro and in vivo studies of cyclosporin A-loaded microspheres based on copolymers of lactide and ɛ-caprolactone: Comparison with conventional PLGA microspheres. Int J Pharm 2005; 295:67-76. [PMID: 15847992 DOI: 10.1016/j.ijpharm.2005.01.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2004] [Revised: 01/18/2005] [Accepted: 01/24/2005] [Indexed: 10/25/2022]
Abstract
A hydrophobic peptide, cyclosporin A (CyA), was incorporated in microspheres based on poly(lactide-b-epsilon-caprolactone) (P(LA-b-CL), LA/CL (in molar ratio): 78.7/21.3 and 48.1/51.9) and poly(lactide-co-glycolide) (PLGA, LA/GA: 80/20) using oil-in-water (O/W) emulsion solvent evaporation method. The microspheres were characterized by SEM, DSC and X-ray diffraction, and CyA release rate was determined by HPLC. It was revealed that CyA can be efficiently loaded into all the microspheres (exceed 96%). Compared to PLGA microspheres, P(LA-b-CL) microspheres liberated CyA more rapidly. Within the first day, about 75, 50 and 12% of CyA released from P(LA-b-CL) (48.1/51.9), P(LA-b-CL) (78.7/21.3) and PLGA microspheres, respectively, which can be attributed to the partial crystallization occurring in P(LA-b-CL) microspheres. CyA levels in whole blood were also tested. In comparison with PLGA microspheres, P(LA-b-CL) microspheres provided a higher blood level of CyA. The maximum CyA concentration in whole blood (approximately 520, 450 and 400 ng ml(-1) for P(LA-b-CL) (48.1/51.9) P(LA-b-CL) (78.7/21.3) and PLGA microspheres, respectively) was reached at the second day post administration. And then P(LA-b-CL) microspheres showed a constant CyA level (about 100-200 ng ml(-1)) for extended periods of time (several weeks). Such CyA-loaded P(LA-b-CL) microspheres displaying higher CyA concentration during the first few days and similar constant blood CyA level thereafter showed more advantages than those prepared with PLGA and could meet clinical needs more efficiently.
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Affiliation(s)
- Y Li
- Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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25
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Chen Y, Deng YJ, Hao YL. Surface modification of liposomes for cardiomyocytes targeting in vitro. Pharmazie 2005; 60:238-40. [PMID: 15801683] [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: 05/02/2023]
Abstract
The effect of novel 3-{4-[2-hydroxyl-(1-methyl ethylamine) propyl oxygen]phenyl}propionic acid cetylester (PAC) as a surface modification ligand on the delivery of liposomes into cultured cardiomyocytes was investigated. Small unilamellar liposomes with and without PAC (PAC-liposome and Plain-liposome) were labeled with a fluorescence marker. The cultured neonatal cardiomyocytes were incubated with liposomes under normoxia or hypoxia conditions, and then the cell-associated fluorescence was measured. A high affinity of the PAC-liposomes to cardiomyocytes was observed. The amount of cell uptake of PAC-liposomes under normoxia conditions was 4-fold higher than that of plain-liposome, and the increase was 8.5-fold when hypoxia occured. The results suggested that PAC is a potential surface modification ligand for liposome targeting the ischemic myocardium.
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Affiliation(s)
- Y Chen
- Department of Pharmaceutical Sciences, Shenyang Pharmaceutical University, Liaoning, PR China.
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26
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Li SJ, Niinomi M, Akahori T, Kasuga T, Yang R, Hao YL. Fatigue characteristics of bioactive glass-ceramic-coated Ti–29Nb–13Ta–4.6Zr for biomedical application. Biomaterials 2004; 25:3369-78. [PMID: 15020109 DOI: 10.1016/j.biomaterials.2003.09.108] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2003] [Accepted: 09/21/2003] [Indexed: 10/26/2022]
Abstract
A new surface-coating method by which CaP invert glass is used to improve the bioactivity of titanium alloys has been developed recently. In this method, the powder of CaP invert glass (CaO-P2O5-TiO2-Na2O) is coated on the surface of titanium alloy samples and heated between 1073 and 1123 K. With this treatment, a calcium phosphate layer mainly containing beta-Ca3(PO4)2 phase can be coated easily on titanium alloy samples. In the present study, the effect of this coating process on the fatigue properties of Ti-29Nb-13Ta-4.6Zr, a new metastable beta alloy for biomedical applications, has been investigated. The fatigue endurance limit of the coated alloy was found to be about 15% higher than that of uncoated alloy, as a result of the formation of a hard (alpha + beta) layer and a small amount of the omega phase during the coating process. The coating exhibits excellent adhesion to the substrate during the tensile and fatigue tests. Subsequent ageing at 673 K for 259.2 ks greatly improves the fatigue resistance of the coated alloy due to isothermal omega phase precipitation, and does not have obvious detrimental effect on the coating properties.
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Affiliation(s)
- S J Li
- Department of Production Systems Engineering, Toyohashi University of Technology, 1-1, Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan
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27
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Abstract
The bioconductivity of a new biomedical titanium alloy Ti-29Nb-13Ta-4.6Zr achieved by a combination of surface oxidation and alkali treatment is reported in this paper. Oxidation treatment at 400 degrees C for 24 h was found to result in the formation of a hard layer on the surface of the alloy. Immersion in a protein-free simulated body fluid and fast calcification solution led to the growth of calcium phosphate (Ca-P) phase on the oxidized and alkali-treated alloy, and the new bioconductive surface was still harder than the substrate. The surface processes during various treatment and immersion processes were investigated in detail, and the morphology of the calcium phosphate crystals was shown to be determined by the concentrations of Ca and P in the solution.
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Affiliation(s)
- S J Li
- Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, PR China
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28
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Hu QM, Yang R, Hao YL, Xu DS, Li D. Concentrated point defects in and order-disorder transition temperature of intermetallic compounds. Phys Rev Lett 2004; 92:185505. [PMID: 15169500 DOI: 10.1103/physrevlett.92.185505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2003] [Indexed: 05/24/2023]
Abstract
In this Letter, a scheme that combines first-principles methods, statistical mechanics, and a self-consistent procedure is presented to evaluate the point defect concentrations in intermetallic compounds. The obtained point defect concentrations can be further used to predict the order-disorder transformation temperature.
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Affiliation(s)
- Q M Hu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.
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Giot L, Bader JS, Brouwer C, Chaudhuri A, Kuang B, Li Y, Hao YL, Ooi CE, Godwin B, Vitols E, Vijayadamodar G, Pochart P, Machineni H, Welsh M, Kong Y, Zerhusen B, Malcolm R, Varrone Z, Collis A, Minto M, Burgess S, McDaniel L, Stimpson E, Spriggs F, Williams J, Neurath K, Ioime N, Agee M, Voss E, Furtak K, Renzulli R, Aanensen N, Carrolla S, Bickelhaupt E, Lazovatsky Y, DaSilva A, Zhong J, Stanyon CA, Finley RL, White KP, Braverman M, Jarvie T, Gold S, Leach M, Knight J, Shimkets RA, McKenna MP, Chant J, Rothberg JM. A protein interaction map of Drosophila melanogaster. Science 2003; 302:1727-36. [PMID: 14605208 DOI: 10.1126/science.1090289] [Citation(s) in RCA: 1581] [Impact Index Per Article: 75.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Drosophila melanogaster is a proven model system for many aspects of human biology. Here we present a two-hybrid-based protein-interaction map of the fly proteome. A total of 10,623 predicted transcripts were isolated and screened against standard and normalized complementary DNA libraries to produce a draft map of 7048 proteins and 20,405 interactions. A computational method of rating two-hybrid interaction confidence was developed to refine this draft map to a higher confidence map of 4679 proteins and 4780 interactions. Statistical modeling of the network showed two levels of organization: a short-range organization, presumably corresponding to multiprotein complexes, and a more global organization, presumably corresponding to intercomplex connections. The network recapitulated known pathways, extended pathways, and uncovered previously unknown pathway components. This map serves as a starting point for a systems biology modeling of multicellular organisms, including humans.
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Affiliation(s)
- L Giot
- CuraGen Corporation, 555 Long Wharf Drive, New Haven, CT 06511, USA
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Song XY, Zeng YJ, Li CX, Liao DH, Hu JL, Hao YL. [ICAM-1 expression of rat brain microvascular endothelial cells caused by fluid shear force]. Sheng Li Xue Bao 2001; 53:13-7. [PMID: 11354790] [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: 04/16/2023]
Abstract
We studied the effect of shear stress (SS) on intercellular adhesion molecule-1 (ICAM-1) expression of rat brain microvascular endothelial cells (RBMECs) using the parallel plate flow chamber method. It was demonstrated that RBMECs showed a time-dependent, but not a force-dependent, upregulation in ICAM-1 expression. Endothelial cell surface expression of ICAM-1 in the supernatants of RBMECs exposed to SS was not changed, thus excluding the possibility that the upregulated expression is due to the factors synthesized by these cells. These data throw light on understanding the signal transduction pathway inside the endothelial cells under the effect of SS.
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Affiliation(s)
- X Y Song
- Biomechanics and Medical Information Institute, Beijing Polytechnic University, Beijing 100022
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Abstract
An atrazine-degrading bacterial culture was isolated from an agricultural soil previously impacted by herbicide spills. The organism was capable of using atrazine under aerobic conditions as the sole source of C and N. Cyanuric acid could replace atrazine as the sole source of N, indicating that the organism was capable of ring cleavage. Ring cleavage was confirmed in 14CO2 evolution experiments with [U-14C-ring]atrazine. Between 40 and 50% of ring-14C was mineralized to 14CO2. [14C]biuret and [14C]urea were detected in spent culture media. Cellular assimilation of 14C was negligible, in keeping with the fully oxidized valence of the ring carbon. Chloride release was stoichiometric. The formation of ammonium during atrazine degradation was below the stoichiometric amount, suggesting a deficit due to cellular assimilation and metabolite-N accumulation. With excess glucose and with atrazine as the sole N source, free ammonium was not detected, suggesting assimilation into biomass. The organism degraded atrazine anaerobically in media which contained (i) atrazine only, (ii) atrazine and glucose, and (iii) atrazine, glucose, and nitrate. To date, this is the first report of a pure bacterial isolate with the ability to cleave the s-triazine ring structure of atrazine. It was also concluded that this bacterium was capable of dealkylation, dechlorination, and deamination in addition to ring cleavage.
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Affiliation(s)
- M Radosevich
- Department of Agronomy, Ohio State University, Columbus 43210
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Hao YL, Ueda Y, Ishii N. Improved procedure of complex demodulation and an application to frequency analysis of sleep spindles in EEG. Med Biol Eng Comput 1992; 30:406-12. [PMID: 1487941 DOI: 10.1007/bf02446168] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [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: 12/27/2022]
Abstract
Complex demodulation is a local version of harmonic analysis that enables the amplitude and phase of particular frequency components of a time series to be described as functions of time. The paper presents a computational procedure involving complex demodulation with interpolation of data in the frequency domain. A computational procedure comprising repeated use of complex demodulation is also presented. This is used to estimate the optimum choice of the demodulating frequency which considerably influences the measurement of the instantaneous amplitude and phase of the underlying process. The usefulness of this procedure is verified by computer simulation. An example of applying this procedure to the estimation of the centre and the instantaneous frequencies of sleep spindles in the EEG (electroencephalogram) is presented. By using the procedure developed here, several partially overlapping sleep spindles are detected and correctly separated. The paper also presents an approach to separating and analysing transient time series (such as overlapping sleep spindles) by using an accurate frequency processing technique.
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Affiliation(s)
- Y L Hao
- Department of Electrical and Computer Engineering, Nagoya Institute of Technology, Japan
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Liu IK, Brown C, Myers RC, Hao YL. Evaluation of intravenous administration of concentrated immunoglobulin G to colostrum-deprived foals. Am J Vet Res 1991; 52:709-12. [PMID: 1854093] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Ten foals of various breeds were deprived of colostrum from birth to 36 hours of age, then were allotted to 2 groups. Foals of group 1 (n = 6) were given 20 g (200 ml) of purified equine IgG IV in a 10% solution, and foals of group 2 (n = 4) were given 30 g (300 ml) of the same preparation. Total administration time for each 10 g of IgG in 100 ml was approximately 10 minutes. Serum IgG concentration in foals was assessed prior to, between 24 and 48 hours, and at 7 and 14 days after IgG administration. Between 24 and 48 hours after IgG administration, mean serum IgG concentration in group-1 foals was 425 mg/dl (range, 350 to 480 mg/dl). Mean body weight for this group of foals was 50.3 kg (range, 43.3 to 54.7 kg). For group-2 foals, mean serum IgG concentration was 768 mg/dl (range, 640 to 920 mg/dl) between 24 and 48 hours after administration of IgG. Foals of this group had mean body weight of 43.2 kg (range, 36.5 to 47.5 kg). Serum IgG concentration in group-2 foals at 24 to 48 hours was significantly (P = 0.005) greater than that in group-1 foals. Mean total IgG recovery at 24 to 48 hours, calculated on the basis of 94.5 ml of plasma volume/kg of body weight, was approximately 100%. Values of IgG measured in all foals 1 and 2 weeks after administration of the IgG concentrate were equivalent to values expected after normal decay of passively acquired IgG.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- I K Liu
- Department of Reproduction, School of Veterinary Medicine, University of California, Davis 95616-8743
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Abstract
Pilot-plant scale experiments using production scale fractionation equipment have been carried out to prepare human serum albumin according to a two-step simple method reported previously. Results have indicated that scale-up is feasible and the resultant albumin is of at least the same quality but with better yield when compared to that obtained by the conventional ethanol fractionation method. Filtration to replace centrifugation in one of the steps for liquid-solid separation was also attempted. It proved to be superior to centrifugation in terms of time and labor savings, but a small percentage of albumin was not recoverable. However, because of the simplicity and higher yield of this fractionation method the final albumin yield is still higher than that obtained by the conventional ethanol method even if the filtration step is introduced. Diafiltration and ultrafiltration are used for solvent removal and concentration, instead of lyophilization and reconstitution to prepare the final albumin solutions.
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Abstract
This report describes the recovery of highly purified immune-serum globulin (ISG) from the 42% ethanol precipitate fraction (42% P) generated during the first step of albumin purification. The method consists of three purification steps: (1) reprecipitation of the 42% P at 20% ethanol, pH 7.2; (2) solubilization of ISG at 17% ethanol, pH 5.2, and (3) isoelectric precipitation of ISG at 25% ethanol, pH 7.2. ISG prepared by this method was homogeneous when subjected to immunoelectrophoresis and polyacrylamide gel electrophoresis, and gave a yield equivalent to 4.7 g/l plasma, corresponding to a final recovery of over 48%.
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Hao YL, Wickerhauser M. Development of large-scale fractionation methods. IV. A simple method for the large-scale preparation of alpha1-acid glycoprotein. Biochim Biophys Acta 1973; 322:99-108. [PMID: 4200679 DOI: 10.1016/0005-2795(73)90180-3] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Tabachnick M, Hao YL, Korcek L. Effect of oleate, diphenylhydantoin and heparin on the binding of 125 I-thyroxine to purified thyroxine-binding globulin. J Clin Endocrinol Metab 1973; 36:392-4. [PMID: 4630272 DOI: 10.1210/jcem-36-2-392] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Wickerhauser M, Hao YL. Large scale preparation of macroglobulins. Vox Sang 1972; 23:119-25. [PMID: 4628154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Tabachnick M, Hao YL, Korcek L. Effect of peptide derivatives of thyroxine on the binding of 125-I-thyroxine to purified human thyroxine-binding globulin. Endocrinology 1971; 89:606-9. [PMID: 4997573 DOI: 10.1210/endo-89-2-606] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Hao YL, Tabachnick M. Thyroxine-protein interactions. VII. Effect of thyroxine analogs on the binding of 125-I-thyroxine to highly purified human thyroxine-binding globulin. Endocrinology 1971; 88:81-92. [PMID: 4991825 DOI: 10.1210/endo-88-1-81] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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