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Wang X, Wang Q, Cai D, Yu J, Chen X, Guo X, Tong P, Liu X, Yin F, Zhou D. Comparative study on the enzymatic degradation of phenolic esters: The HPLC-UV quantification of tyrosol and gallic acid liberated from tyrosol acyl esters and alkyl gallates by hydrolytic enzymes. Food Chem 2024; 442:138529. [PMID: 38271912 DOI: 10.1016/j.foodchem.2024.138529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 12/12/2023] [Accepted: 01/19/2024] [Indexed: 01/27/2024]
Abstract
HPLC-UV analysis was used to evaluate the enzymatic degradation characteristics of tyrosol acyl esters (TYr-Es) and alkyl gallates (A-GAs). Among various hydrolytic enzymes, TYr-Es can be hydrolyzed by pancrelipase, while A-GAs cannot be hydrolyzed by pancrelipase. Interestingly, carboxylesterase-1b (CES-1b), carboxylesterase-1c (CES-1c) and carboxylesterase-2 (CES-2) are able to hydrolyze TYr-Es and A-GAs, and thus to liberate tyrosol (TYr) and gallic acid (GA). By contrast, the degrees of hydrolysis (DHs) of TYr-Es and A-GAs by CES-1b and CES-1c were significantly higher than those by CES-2. Meanwhile, the DHs of TYr-Es were much higher than those of A-GAs. Especially, the DHs firstly increased and then decreased with the increasing alkyl chain length. Besides, DHs positively correlated with the unsaturation degree at the same chain length. Through regulating carbon length, unsaturation degree and the ester bond structure, controlled-release of phenolic compounds and fatty acids (or fatty alcohols) from phenolic esters will be easily achieved.
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Affiliation(s)
- Xinmiao Wang
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Qian Wang
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Dong Cai
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Jinghan Yu
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Xuan Chen
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, People's Republic of China
| | - Xu Guo
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Peiyong Tong
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Xiaoyang Liu
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Fawen Yin
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China.
| | - Dayong Zhou
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
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2
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Wang X, Wang Q, Cai D, Guo X, Tong P, Yin F, Liu X, Zhou D. In Vitro Gastrointestinal Digestion and Microbial Hydrolysis of Hydroxytyrosol-SCFA and Tyrosol-SCFA Acyl Esters: Controlled-Release of SCFAs and Polyphenols. J Agric Food Chem 2023. [PMID: 37294303 DOI: 10.1021/acs.jafc.3c00747] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Phenolipids such as hydroxytyrosol-SCFA acyl esters (HTy-SEs) and tyrosol-SCFA acyl esters (TYr-SEs) with various alkyl chains lengths (C1-C4) and different isomers (branched-chain and straight-chain) were successfully synthesized. All esters were hydrolyzed by pancreatic lipase to produce polyphenols (HTy and TYr) and SCFAs (iso-butyric acid, acetic acid, propionic acid, and n-butyric acid). Moreover, HTy-SEs (and TYr-SEs) could also be hydrolyzed to free HTy (and TYr) and SCFAs by gut microbiota and Lactobacillus from mice feces. Especially, the hydrolysis rates showed positive correlation with the carbon skeleton length, and the hydrolysis degree (DH) of ester with a branched-chain fatty acid was weaker than that of ester with a straight-chain fatty acid. Besides, the DH values of TYr -SEs were significantly higher than those of HTy-SEs. Therefore, through regulating the structures of polyphenols, carbon skeleton lengths, and isomers, controlled-release of polyphenols and SCFAs from phenolipids will be easily achieved.
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Affiliation(s)
- Xinmiao Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Qian Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Dong Cai
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Xu Guo
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Peiyong Tong
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Fawen Yin
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, People's Republic of China
- State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Xiaoyang Liu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, People's Republic of China
- State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Dayong Zhou
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, People's Republic of China
- State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, People's Republic of China
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3
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Wang X, Wang Q, Yu J, Guo X, Tong P, Yin F, Liu X, Zhou D. The potential of hydroxytyrosol fatty acid esters to enhance oral bioavailabilities of hydroxytyrosol and fatty acids: Continuous and slow-release ability in small intestine and blood. Food Chem 2023; 422:136246. [PMID: 37126954 DOI: 10.1016/j.foodchem.2023.136246] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 02/24/2023] [Revised: 04/23/2023] [Accepted: 04/24/2023] [Indexed: 05/03/2023]
Abstract
HPLC-UV analysis in rat everted gut sac and in vitro simulated digestion models indicated that hydroxytyrosol fatty acid esters (HTy-Es) could be hydrolyzed by pancreatic lipase to slow-release of free fatty acids (FAs) and HTy. Meanwhile, the HTy-Es, the liberated FAs and the HTy could cross the membrane and were transported into blood circulation. HTy-Es were further hydrolyzed by carboxylesterase in in vitro rat plasma hydrolysis model, which also showed slow-release of FAs (C1-C4) and HTy. Especially, the rates of hydrolysis and transport initially increased and then decreased with the increasing alkyl chain length. Besides, the above rates of the HTy-Es with a straight chain were greater than those of its isomer with a branched chain. Therefore, the above-mentioned continuous and slow-release of FAs and HTy in small intestine and blood clearly demonstrated that HTy-Es would be an effective approach to enhance oral bioavailabilities of free fatty acids and hydroxytyrosol.
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Affiliation(s)
- Xinmiao Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China
| | - Qian Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China
| | - Jinghan Yu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China
| | - Xu Guo
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China
| | - Peiyong Tong
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China
| | - Fawen Yin
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China; State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, PR China.
| | - Xiaoyang Liu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China; State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, PR China
| | - Dayong Zhou
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China; State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, PR China
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4
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Chen FC, Fei Y, Li SJ, Wang Q, Luo X, Yan J, Lu WJ, Tong P, Song WH, Zhu XB, Zhang L, Zhou HB, Zheng FW, Zhang P, Lichtenstein AL, Katsnelson MI, Yin Y, Hao N, Sun YP. Temperature-Induced Lifshitz Transition and Possible Excitonic Instability in ZrSiSe. Phys Rev Lett 2020; 124:236601. [PMID: 32603145 DOI: 10.1103/physrevlett.124.236601] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 04/06/2020] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
The nodal-line semimetals have attracted immense interest due to the unique electronic structures such as the linear dispersion and the vanishing density of states as the Fermi energy approaching the nodes. Here, we report temperature-dependent transport and scanning tunneling microscopy (spectroscopy) [STM(S)] measurements on nodal-line semimetal ZrSiSe. Our experimental results and theoretical analyses consistently demonstrate that the temperature induces Lifshitz transitions at 80 and 106 K in ZrSiSe, which results in the transport anomalies at the same temperatures. More strikingly, we observe a V-shaped dip structure around Fermi energy from the STS spectrum at low temperature, which can be attributed to co-effect of the spin-orbit coupling and excitonic instability. Our observations indicate the correlation interaction may play an important role in ZrSiSe, which owns the quasi-two-dimensional electronic structures.
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Affiliation(s)
- F C Chen
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
- University of Science and Technology of China, Hefei 230026, China
| | - Y Fei
- Department of Physics, Zhejiang University, Hangzhou 310027, China
| | - S J Li
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
- College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China
| | - Q Wang
- University of Science and Technology of China, Hefei 230026, China
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - X Luo
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - J Yan
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
- University of Science and Technology of China, Hefei 230026, China
| | - W J Lu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - P Tong
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - W H Song
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - X B Zhu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - L Zhang
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - H B Zhou
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - F W Zheng
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - P Zhang
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China
| | - A L Lichtenstein
- Institute for Theoretical Physics, University Hamburg, Jungiusstrasse 9, D-20355 Hamburg, Germany
- Theoretical Physics and Applied Mathematics Department, Ural Federal University, Mira Street 19, 620002 Ekaterinburg, Russia
| | - M I Katsnelson
- Theoretical Physics and Applied Mathematics Department, Ural Federal University, Mira Street 19, 620002 Ekaterinburg, Russia
- Institute for Molecules and Materials, Radboud University, Heijendaalseweg 135, NL-6525AJ Nijmegen, The Netherlands
| | - Y Yin
- Department of Physics, Zhejiang University, Hangzhou 310027, China
- Collaborative Innovation Center of Microstructures, Nanjing University, Nanjing 210093, China
| | - Ning Hao
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Y P Sun
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
- Collaborative Innovation Center of Microstructures, Nanjing University, Nanjing 210093, China
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5
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Yan J, Luo X, Gao JJ, Lv HY, Xi CY, Sun Y, Lu WJ, Tong P, Sheng ZG, Zhu XB, Song WH, Sun YP. The giant planar Hall effect and anisotropic magnetoresistance in Dirac node arcs semimetal PtSn 4. J Phys Condens Matter 2020; 32:315702. [PMID: 32235052 DOI: 10.1088/1361-648x/ab851f] [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: 06/11/2023]
Abstract
Topological semimetals (TSMs) present intriguing quantum states and have attracted much attention in recent years because of exhibiting various anomalous magneto-transport phenomena. Theoretical prediction shows that some novel phenomena, such as negative magnetoresistance (MR) and the planar Hall effect (PHE), originate from the chiral anomaly in TSMs. In this work, high-field (33 T) Shubnikov-de Haas (SdH) oscillations are obtained to reveal the topology of PtSn4. Giant PHE and anisotropic magnetoresistance (AMR) are observed in Dirac node arcs of semimetal PtSn4. First, a non-zero transverse voltage can be acquired while tilting the in-plane magnetic field. Moreover, the amplitude of PHE sharply increases at T * ∼ 50 K with decreasing temperature, which is suggested to be related to the Fermi surface reconstruction observed in PtSn4. Subsequently, the field-dependent amplitudes of the PHE show an abnormal behavior around 50 K, which is thought to stem from the complex correlation between the chiral charge and electric one in PtSn4 driving the system into different coupling states due to the complicated band structure. On the other hand, the relative AMR is negative and up to -98% at 8.5 T. Our work proves that the PHE measurements are a convincing transport fingerprint feature to confirm the chiral anomaly in TSMs.
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Affiliation(s)
- J Yan
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, People's Republic of China. University of Science and Technology of China, Hefei, 230026, People's Republic of China
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6
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Nilsson M, Sun H, Robichaux J, Diao L, Xi Y, Tong P, Sheng L, Hofstad M, Kawakami M, Le X, Liu X, Fang Y, Poteete A, Vailati Negrao M, Tran H, Dmitrovsky E, Peng D, Gibbons D, Wang J, Heymach J. IA34 The YAP/FOXM1 Axis Regulates EMT-Associated EGFR Tyrosine Kinase Inhibitor Resistance and Increased Expression of Spindle Assembly Checkpoint Components. J Thorac Oncol 2020. [DOI: 10.1016/j.jtho.2019.12.123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Heong V, Lim Y, Lee S, Ow S, Lim S, Ong P, Low J, Ng J, Ilancheran A, Tong P, Lim D, Tan D. Efficacy and tolerability of olaparib in Asian patients with recurrent ovarian, primary peritoneal or fallopian tube carcinoma: The National University Cancer Institute, Singapore experience. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy436.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Della Corte C, Ramkumar K, Sen T, Tong P, Gibbons D, Heymach J, Wang J, Fan YH, Cardnell R, Byers L. DNA damaging agents and immunotherapy in NSCLC: Is there a STING in the tale? Ann Oncol 2018. [DOI: 10.1093/annonc/mdy269.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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9
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Sun Q, Zhang L, Xu T, Ying J, Xia B, Jing H, Tong P. Combined use of adipose derived stem cells and TGF-β3 microspheres promotes articular cartilage regeneration in vivo. Biotech Histochem 2018; 93:168-176. [PMID: 29393693 DOI: 10.1080/10520295.2017.1401663] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
We investigated enhancement of articular cartilage regeneration using a combination of human adipose derived stem cells (hADSCs) and TGF-β3 microspheres (MS) in vivo. Poly-lactic-co-glycolic acid (PLGA)MS were prepared using a solid/oil/water emulsion solvent evaporation-extraction method. The morphology of the MS was evaluated by scanning electron microscopy (SEM). The release characteristic of the TGF-β3 MS was evaluated. A New Zealand rabbit model for experimental osteoarthritis (OA) was established using the anterior medial meniscus excision method. Thirty OA rabbits were divided randomly into three groups according to different treatments of the right knee joints on day 7 after surgery: hADSCs/MS group received injection of both hADSCs and TGF-β3 MS; hADSCs group was injected with hADSCs; control group was injected with normal saline. Gross observation, histological staining and RT-PCR for collagen II and aggrecan) were used to assess the severity of OA and for evaluating the effect of combined use of hADSCs and TGF-β3 MS on articular cartilage regeneration in vivo. The MS were spherical with a smooth surface and the average diameter was 28 ± 2.3 µm. The encapsulation efficiency test showed that 73.8 ± 2.9% of TGF-β3 were encapsulated in the MS. The release of TGF- β3 lasted for at least 30 days. At both 6 and 12 weeks after injection, three groups exhibited different degrees of OA. Histological analysis showed that the hADSCs/MS group exhibited less OA than the hADSCs group, and the control group exhibited the most severe OA. Real-time RT-PCR showed that the gene expression of both collagen II and aggrecan were significantly up-regulated in the hADSCs/MS group. At 12 weeks after injection, the hADSCs/MS group also exhibited less OA than the other two groups. Combined use of hADSCs and TGF-β3 MS promoted articular cartilage regeneration in rabbit OA models.
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Affiliation(s)
- Q Sun
- a Department of Orthopaedic Surgery , Fuyang Orthopaedics and Traumatology Affiliated Hospital of Zhejiang Chinese Medical University , Hangzhou.,b Zhejiang Chinese Medical University , Hangzhou
| | - L Zhang
- b Zhejiang Chinese Medical University , Hangzhou
| | - T Xu
- b Zhejiang Chinese Medical University , Hangzhou
| | - J Ying
- b Zhejiang Chinese Medical University , Hangzhou
| | - B Xia
- d Shaoxing Chinese Medical Hospital , Shaoxing , China
| | - H Jing
- b Zhejiang Chinese Medical University , Hangzhou
| | - P Tong
- c Department of Orthopaedic Surgery , The First Affiliated Hospital of Zhejiang Chinese Medical University , Hangzhou
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10
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Guijarro I, Poteete A, Fan Y, Cho S, Tong P, Roarty E, Nilsson M, Rodriguez-Canales J, Mino B, Cuentas EP, Wistuba I, Wang J, Heymach J. P3.03-027 LKB1 Loss Is Associated with Resistance to Anti-Angiogenic Therapy in Non-Small Cell Lung Cancer Mouse Models. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Chen L, Diao L, Yang Y, Yi X, Rodriguez B, Li Y, Rodriguez-Canales J, Liu X, Huang A, Zhao Q, Peng D, Fradette J, Tong P, Ungewiss C, Fan Y, Peng D, Villalobos P, Dmitrovsky E, Papadimitrakopoulou V, Wang J, Byers L, Heymach J, Ullrich S, Wistuba I, Qin X, Gibbons D. OA 13.01 CD38-Mediated Immunometabolic Suppression as a Mechanism of Resistance to PD-1/PD-L1 Axis Blockade. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Jonasch E, Fuller G, McCutcheon I, Ding Z, Zhou L, Liu X, Kong W, Powell R, Park IY, Tannir N, Rathmell W, Dong B, Matin S, Tong X, Huang Y, Tong P, Wang J, Walker C, Sun M. The role of hepatocyte nuclear factor 1 homeobox B (HNF1B) loss in chromophobe RCC (ChRCC) development. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx391.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Kan XC, Wang BS, Zhang L, Zu L, Lin S, Lin JC, Tong P, Song WH, Sun YP. Critical behavior in tetragonal antiperovskite GeNFe 3 with a frustrated ferromagnetic state. Phys Chem Chem Phys 2017; 19:13703-13709. [PMID: 28497140 DOI: 10.1039/c6cp08020k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tetragonal GeNFe3 has a second-order ferromagnetic (FM) to paramagnetic transition at 76 K. Our integrated investigations indicate that the ground FM state is frustrated and the tetragonal symmetry is retained below 550 K based on the results of variable temperature X-ray diffraction. Critical behavior was analyzed by a systematic bulk magnetization study. The estimated critical exponents by three different methods (modified Arrott plot, the Kouvel-Fisher method, and critical isotherm analysis) conformably suggest that long-range magnetic coupling described by mean-field (MF) theoretical model is dominant in GeNFe3. The experimental M-T-H data collapse into two independent branches according to the scaling equations m = f±(h) with the renormalized magnetization m = ε-βM(H, ε) and the magnetic field h = Hε-(β+γ). The exchange distance is estimated as J(r) ∼ r-4.8 on the basis of the β and γ values, which lies between the long-range MF model (r-4.5) and the short-range 3D Heisenberg (3DH) model (r-5). Our results indicate that the competition between local magnetic moments of iron 3d electronic state and itinerant covalent interactions of N-Fe bonds should be responsible for critical behavior in this system.
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Affiliation(s)
- X C Kan
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.
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14
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Yang G, Jiang Y, Tong P, Li C, Yang W, Hu J, Ye L, Gu W, Shi C, Shan B, Wang C. Alleviation of enterotoxigenic Escherichia coli challenge by recombinant Lactobacillus plantarum expressing a FaeG- and DC-targeting peptide fusion protein. Benef Microbes 2017; 8:379-391. [DOI: 10.3920/bm2016.0116] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
FaeG is the major subunit of K88 fimbriae. These cell surface attachments are considered to be the major virulence factor of enterotoxigenic Escherichia coli (ETEC), which causes diarrhoea in piglets. The use of dendritic cell-targeting peptide (DCpep) has been demonstrated to be an effective approach to enhance the immunity of vaccines. Lactobacillus plantarum is an attractive candidate for oral vaccination owing to its beneficial effects and safety. In this study, L. plantarum was employed to deliver a FaeG-DCpep fusion antigen, and the immune response in mice was evaluated. The synthesis of FaeG-DCpep dramatically increased the adhesion of recombinant L. plantarum (RLP) to IPEC-J2 cell surfaces, resulting in direct competition between L. plantarum and ETEC during adhesion assays. Significantly higher levels of body weight gain, sera immunoglobulin G and intestinal immunoglobulin A were observed in BALB/c mice immunised with RLP. In addition, the number of CD19+ B cells and CD11c+DC cells and the expression levels of several cytokines in the spleen and lymph nodes increased significantly compared to non-immunised mice. The oral administration of RLP also alleviated the symptoms of ETEC challenge, as shown by haematoxylin-eosin staining, indicating that RLP may be an efficient vaccine candidate.
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Affiliation(s)
- G. Yang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, Jilin Province 130118, China P.R
| | - Y. Jiang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, Jilin Province 130118, China P.R
| | - P. Tong
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China P.R
| | - C. Li
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, Jilin Province 130118, China P.R
| | - W. Yang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, Jilin Province 130118, China P.R
| | - J. Hu
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, Jilin Province 130118, China P.R
| | - L. Ye
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, Jilin Province 130118, China P.R
| | - W. Gu
- Shandong Baolai-Leelai Bio-Tech Co., LTD, Taian, Shandong Province 171000, China P.R
| | - C. Shi
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, Jilin Province 130118, China P.R
| | - B. Shan
- Shandong Baolai-Leelai Bio-Tech Co., LTD, Taian, Shandong Province 171000, China P.R
| | - C. Wang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, Jilin Province 130118, China P.R
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15
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Yang C, Qu BY, Pan SS, Zhang L, Zhang RR, Tong P, Xiao RC, Lin JC, Guo XG, Zhang K, Tong HY, Lu WJ, Wu Y, Lin S, Song WH, Sun YP. Large Positive Thermal Expansion and Small Band Gap in Double-ReO 3-Type Compound NaSbF 6. Inorg Chem 2017; 56:4990-4995. [PMID: 28406625 DOI: 10.1021/acs.inorgchem.7b00002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Double-ReO3-type structure compound NaSbF6 undergoes a low-temperature rhombohedral to high-temperature cubic phase between 303 and 323 K, as revealed by temperature-dependent X-ray diffractions. Although many double-ReO3-type fluorides exhibit either low thermal expansion or negative thermal expansion (NTE), NaSbF6 exhibits positive thermal expansion (PTE) with a large volumetric coefficient of thermal expansion, αv = 62 ppm/K, in its cubic phase. Raman spectroscopy reveals that the low-frequency transverse vibration of fluorine atoms is stiffened in NaSbF6, compared with the typical NTE compound CaZrF6 with the same structure. The related weak contraction associated with the polyhedral rocking would be overcome by the notable elongation of the Na-F bond length on heating, thus leading to the large volumetric PTE. Unlike ScF3 and CaZrF6 which are insulators with a wide band gap, a relative small band gap of 3.76 eV was observed in NaSbF6. The small band gap can be attributed to the hybridization between the Sb 5s and F 2p orbitals.
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Affiliation(s)
- C Yang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,University of Science and Technology of China , Hefei 230026, People's Republic of China
| | - B Y Qu
- Laboratory of Amorphous Materials, School of Materials Science and Engineering, Hefei University of Technology , Hefei 230009, People's Republic of China
| | - S S Pan
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - L Zhang
- High Magnetic Field Laboratory, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - R R Zhang
- High Magnetic Field Laboratory, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - P Tong
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - R C Xiao
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,University of Science and Technology of China , Hefei 230026, People's Republic of China
| | - J C Lin
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - X G Guo
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,University of Science and Technology of China , Hefei 230026, People's Republic of China
| | - K Zhang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,University of Science and Technology of China , Hefei 230026, People's Republic of China
| | - H Y Tong
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,University of Science and Technology of China , Hefei 230026, People's Republic of China
| | - W J Lu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - Y Wu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - S Lin
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - W H Song
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - Y P Sun
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,High Magnetic Field Laboratory, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People's Republic of China
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16
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Zhang S, Qu H, Jin H, Jiang X, Tong P. Femoral head fracture in a haemophilic arthropathy patient: a case report from China. Haemophilia 2017; 23:e219-e221. [PMID: 28449213 DOI: 10.1111/hae.13189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/07/2017] [Indexed: 11/30/2022]
Affiliation(s)
- S Zhang
- The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China.,Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China.,Department of Biochemistry, Rush University Medical Center, Chicago, IL, USA
| | - H Qu
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - H Jin
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China.,Institute of Orthopaedics and Traumatology of Zhejiang Province, Hangzhou, Zhejiang Province, China
| | - X Jiang
- The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - P Tong
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China.,Institute of Orthopaedics and Traumatology of Zhejiang Province, Hangzhou, Zhejiang Province, China.,Department of Orthopaedics Surgery, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
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17
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Lv HY, Lu WJ, Li JY, Xiao RC, Wei MJ, Tong P, Zhu XB, Sun YP. Edge-controlled half-metallic ferromagnetism and direct-gap semiconductivity in ZrS2 nanoribbons. RSC Adv 2017. [DOI: 10.1039/c7ra05362b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Intrinsic half-metallic ferromagnetism and direct-gap semiconductivity are predicted in ZrS2 nanoribbons with different edge configurations.
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Affiliation(s)
- H. Y. Lv
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - W. J. Lu
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - J. Y. Li
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - R. C. Xiao
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - M. J. Wei
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - P. Tong
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - X. B. Zhu
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - Y. P. Sun
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
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18
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Cardnell R, Tong P, Giri U, Gudikote J, Banerjee U, Kalu N, Fan Y, Nilsson M, Johnson F, Tran H, Wang J, Heymach J, Byers L. A high-throughput drug screen identifies new therapeutic vulnerabilities in non-small cell lung cancers (NSCLC) with overexpression of the EMT-associated receptor tyrosine kinase AXL. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32840-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Peng DH, Ungewiss C, Tong P, Byers LA, Wang J, Canales JR, Villalobos PA, Uraoka N, Mino B, Behrens C, Wistuba II, Han RI, Wanna CA, Fahrenholtz M, Grande-Allen KJ, Creighton CJ, Gibbons DL. ZEB1 induces LOXL2-mediated collagen stabilization and deposition in the extracellular matrix to drive lung cancer invasion and metastasis. Oncogene 2016; 36:1925-1938. [PMID: 27694892 PMCID: PMC5378666 DOI: 10.1038/onc.2016.358] [Citation(s) in RCA: 146] [Impact Index Per Article: 18.3] [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: 04/04/2016] [Revised: 08/07/2016] [Accepted: 08/08/2016] [Indexed: 12/18/2022]
Abstract
Lung cancer is the leading cause of cancer-related death, primarily due to distant metastatic disease. Metastatic lung cancer cells can undergo an epithelial-to-mesenchymal transition (EMT) regulated by many transcription factors, including double-negative feedback loop between the microRNA-200 (miR-200) family and ZEB1, but the precise mechanisms by which ZEB1-dependent EMT promotes malignancy remain largely undefined. While the cell-intrinsic effects of EMT are important for tumor progression, the reciprocal dynamic crosstalk between mesenchymal cancer cells and the extracellular matrix (ECM) is equally critical in regulating invasion and metastasis. Investigating the collaborative effect of EMT and ECM in the metastatic process reveals increased collagen deposition in metastatic tumor tissues as a direct consequence of amplified collagen gene expression in ZEB1-activated mesenchymal lung cancer cells. Additionally, collagen fibers in metastatic lung tumors exhibit greater linearity and organization as a result of collagen crosslinking by the lysyl oxidase (LOX) family of enzymes. Expression of the LOX and LOXL2 isoforms is directly regulated by miR-200 and ZEB1, respectively, and their upregulation in metastatic tumors and mesenchymal cell lines is coordinated to that of collagen. Functionally, LOXL2, as opposed to LOX, is the principle isoform that crosslinks and stabilizes insoluble collagen deposition in tumor tissues. In turn, focal adhesion formation and FAK/SRC signaling is activated in mesenchymal tumor cells by crosslinked collagen in the ECM. Our study is the first to validate direct regulation of LOX and LOXL2 by the miR-200/ZEB1 axis, defines a novel mechanism driving tumor metastasis, delineates collagen as a prognostic marker, and identifies LOXL2 as a potential therapeutic target against tumor progression.
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Affiliation(s)
- D H Peng
- Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,The University of Texas Graduate School of Biomedical Sciences, Houston, TX, USA
| | - C Ungewiss
- Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,The University of Texas Graduate School of Biomedical Sciences, Houston, TX, USA
| | - P Tong
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - L A Byers
- Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - J Wang
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - J R Canales
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - P A Villalobos
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - N Uraoka
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - B Mino
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - C Behrens
- Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - I I Wistuba
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - R I Han
- Department of Bioengineering, Rice University, Houston, TX, USA
| | - C A Wanna
- Department of Bioengineering, Rice University, Houston, TX, USA
| | - M Fahrenholtz
- Department of Bioengineering, Rice University, Houston, TX, USA
| | | | - C J Creighton
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Medicine and Dan L Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - D L Gibbons
- Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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20
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Huang ZM, Du SH, Huang LG, Li JH, Xiao L, Tong P. Leptin promotes apoptosis and inhibits autophagy of chondrocytes through upregulating lysyl oxidase-like 3 during osteoarthritis pathogenesis. Osteoarthritis Cartilage 2016; 24:1246-53. [PMID: 26947886 DOI: 10.1016/j.joca.2016.02.009] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [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] [Received: 08/26/2015] [Revised: 02/16/2016] [Accepted: 02/26/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Leptin has been found highly expressed in human osteoarthritis. We aimed to explore the possible effects and mechanisms of leptin on the apoptosis and autophagy of chondrocytes during osteoarthritis pathogenesis. METHODS Gene expression profile from osteoarthritis affected and preserved cartilage were downloaded from NCBI's Gene Expression Omnibus database (GSE57218). Lysyl oxidase-like 3 (LOXL3) mRNA expression in cartilage tissues and leptin concentration in joint synovial fluid (SF) was measured in samples from 45 osteoarthritis patients and 25 healthy donors by real-time PCR and radioimmunoassay, respectively. Rat osteoarthritis model was induced by anterior cruciate ligament transection (ACLT). The expression of apoptosis regulators and autophagy markers were detected by Western blot. Cell survival and cell apoptosis were identified by CCK-8 and flow cytometry, respectively. RESULTS Re-analysis on GSE57218 indicated that LOXL3 mRNA was upregulated in osteoarthritis affected cartilage. LOXL3 mRNA was upregulated in osteoarthritis patients, which was positively correlated with SF leptin concentration. Similar results were obtained in rat osteoarthritis model. Moreover, ACLT surgery led to a significant increase in the protein levels of cleaved caspase 3, and a notable decrease in the protein levels of Bcl-2, LC3 II/LC3 I and Beclin1. Silencing of LOXL3 in ACLT and leptin treated primary chondrocytes significantly inhibited cell apoptosis, and promoted cell proliferation and autophagy. Moreover, overexpression of LOXL3 remarkably inhibited autophagy of chondrocytes via activating mTORC1. CONCLUSIONS LOXL3, a downstream of leptin, stimulated the apoptosis, but inhibited the autophagy of chondrocytes. LOXL3 is a potential therapy target for osteoarthritis.
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Affiliation(s)
- Z M Huang
- Department of Orthopaedic Surgery, Xiaoshan Chinese Medical Hospital, China; Department of Orthopaedic Surgery, Affiliated Jiangnan Hospital of Zhejiang Chinese Medical University, China; Zhejiang Chinese Medical University, China; Institute of Orthopaedics and Traumatology of Zhejiang Province, China
| | - S H Du
- Department of Orthopedic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, China
| | - L G Huang
- Zhejiang Chinese Medical University, China
| | - J H Li
- Department of Orthopaedic Surgery, Xiaoshan Chinese Medical Hospital, China
| | - L Xiao
- Zhejiang Chinese Medical University, China; Institute of Orthopaedics and Traumatology of Zhejiang Province, China; Department of Orthopaedic Surgery, the First Affiliated Hospital of Zhejiang Chinese Medical University, China
| | - P Tong
- Zhejiang Chinese Medical University, China; Institute of Orthopaedics and Traumatology of Zhejiang Province, China; Department of Orthopaedic Surgery, the First Affiliated Hospital of Zhejiang Chinese Medical University, China.
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21
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He W, Song H, Su Y, Geng L, Ackerson BJ, Peng HB, Tong P. Dynamic heterogeneity and non-Gaussian statistics for acetylcholine receptors on live cell membrane. Nat Commun 2016; 7:11701. [PMID: 27226072 PMCID: PMC4894960 DOI: 10.1038/ncomms11701] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [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: 01/02/2016] [Accepted: 04/20/2016] [Indexed: 12/14/2022] Open
Abstract
The Brownian motion of molecules at thermal equilibrium usually has a finite correlation time and will eventually be randomized after a long delay time, so that their displacement follows the Gaussian statistics. This is true even when the molecules have experienced a complex environment with a finite correlation time. Here, we report that the lateral motion of the acetylcholine receptors on live muscle cell membranes does not follow the Gaussian statistics for normal Brownian diffusion. From a careful analysis of a large volume of the protein trajectories obtained over a wide range of sampling rates and long durations, we find that the normalized histogram of the protein displacements shows an exponential tail, which is robust and universal for cells under different conditions. The experiment indicates that the observed non-Gaussian statistics and dynamic heterogeneity are inherently linked to the slow-active remodelling of the underlying cortical actin network.
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Affiliation(s)
- W He
- Nano Science and Technology Program, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - H Song
- Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Y Su
- Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - L Geng
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - B J Ackerson
- Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA
| | - H B Peng
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - P Tong
- Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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22
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Kan XC, Wang BS, Zu L, Lin S, Lin JC, Tong P, Song WH, Sun YP. Anomalous Hall effect in tetragonal antiperovskite GeNFe3 with a frustrated ferromagnetic state. RSC Adv 2016. [DOI: 10.1039/c6ra15976a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report observed anomalous Hall effect (AHE) behavior in the antiperovskite compound GeNFe3 with a tetragonal symmetry.
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Affiliation(s)
- X. C. Kan
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - B. S. Wang
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - L. Zu
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - S. Lin
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - J. C. Lin
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - P. Tong
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - W. H. Song
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - Y. P. Sun
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
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23
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Lim L, Tong P, Lee S, Low J. 278P Characteristics of endometrial and ovarian cancers in Lynch syndrome and hereditary breast ovarian cancer syndrome. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv525.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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24
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Zhang S, Lu C, Ying J, Wang P, Xu T, Chen D, Jin H, Tong P. Inflammatory focal bone destruction in femoral heads with end-stage haemophilic arthropathy: a study on clinic samples with micro-CT and histological analyses. Haemophilia 2015; 21:e472-8. [PMID: 26388304 DOI: 10.1111/hae.12808] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2015] [Indexed: 01/21/2023]
Abstract
INTRODUCTION Focal bone destruction has a high prevalence in haemophilic arthropathy (HA) affected joints, but the mechanism remains unclear. AIM We undertook this study on clinic samples to explore the focal bone destruction in femoral heads suffered with end-stage HA. METHODS Twenty-one femoral heads from HA patients and 19 femoral heads from rheumatoid arthritis (RA) patients were scanned by micro-CT. Histological analysis, including TRAP staining of subchondral bone were performed to evaluate the bone destruction and osteoclasts activity. RANKL, OPG as well as pro-inflammatory cytokines, such as TNF-α and IL-1β in subchondral bone were detected by immunohistochemistry (IHC) method. RESULTS Severe focal lesion was observed in all the HA and RA femoral heads by micro-CT imaging and histological analysis. The mean percentage of lesion volume to total volume of the femoral heads from HA patients was significantly higher than those from RA patients. There was no significant difference in osteoclasts numbers in subchondral bone between HA and RA groups. By IHC analysis, high expression of RANKL, TNF-α, IL-1β and low expression of OPG and RANK were observed in subchondral bone, and there were no significant differences in the expression of RANKL, OPG, RANK, TNF-α and IL-1β in femoral heads derived from HA and RA patients. CONCLUSION Our findings demonstrated the focal bone destruction coupled with inflammatory osteoclastogenesis at subchondral bone in femoral heads from patients with end-stage HA, and that was similar to the changes in the femoral heads of RA patients.
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Affiliation(s)
- S Zhang
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China.,Institute of Orthopaedics and Traumatology of Zhejiang Province, Hangzhou, Zhejiang, China.,Department of Biochemistry, Rush University Medical Center, Chicago, IL, USA
| | - C Lu
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - J Ying
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - P Wang
- Institute of Orthopaedics and Traumatology of Zhejiang Province, Hangzhou, Zhejiang, China
| | - T Xu
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - D Chen
- Department of Biochemistry, Rush University Medical Center, Chicago, IL, USA
| | - H Jin
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China.,Institute of Orthopaedics and Traumatology of Zhejiang Province, Hangzhou, Zhejiang, China
| | - P Tong
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China.,Institute of Orthopaedics and Traumatology of Zhejiang Province, Hangzhou, Zhejiang, China.,Department of Orthopaedics Surgery, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
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25
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Ho TH, Park IY, Zhao H, Tong P, Champion MD, Yan H, Monzon FA, Hoang A, Tamboli P, Parker AS, Joseph RW, Qiao W, Dykema K, Tannir NM, Castle EP, Nunez-Nateras R, Teh BT, Wang J, Walker CL, Hung MC, Jonasch E. High-resolution profiling of histone h3 lysine 36 trimethylation in metastatic renal cell carcinoma. Oncogene 2015; 35:1565-74. [PMID: 26073078 PMCID: PMC4679725 DOI: 10.1038/onc.2015.221] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [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: 08/20/2014] [Revised: 03/01/2015] [Accepted: 03/06/2015] [Indexed: 02/07/2023]
Abstract
Mutations in SETD2, a histone H3 lysine trimethyltransferase, have been identified in clear cell renal cell carcinoma (ccRCC); however it is unclear if loss of SETD2 function alters the genomic distribution of histone 3 lysine 36 trimethylation (H3K36me3) in ccRCC. Furthermore, published epigenomic profiles are not specific to H3K36me3 or metastatic tumors. To determine if progressive SETD2 and H3K36me3 dysregulation occurs in metastatic tumors, H3K36me3, SETD2 copy number (CN) or SETD2 mRNA abundance was assessed in two independent cohorts: metastatic ccRCC (n=71) and the Cancer Genome Atlas Kidney Renal Clear Cell Carcinoma data set (n=413). Although SETD2 CN loss occurs with high frequency (>90%), H3K36me3 is not significantly impacted by monoallelic loss of SETD2. H3K36me3-positive nuclei were reduced an average of ~20% in primary ccRCC (90% positive nuclei in uninvolved vs 70% positive nuclei in ccRCC) and reduced by ~60% in metastases (90% positive in uninvolved kidney vs 30% positive in metastases) (P<0.001). To define a kidney-specific H3K36me3 profile, we generated genome-wide H3K36me3 profiles from four cytoreductive nephrectomies and SETD2 isogenic renal cell carcinoma (RCC) cell lines using chromatin immunoprecipitation coupled with high-throughput DNA sequencing and RNA sequencing. SETD2 loss of methyltransferase activity leads to regional alterations of H3K36me3 associated with aberrant RNA splicing in a SETD2 mutant RCC and SETD2 knockout cell line. These data suggest that during progression of ccRCC, a decline in H3K36me3 is observed in distant metastases, and regional H3K36me3 alterations influence alternative splicing in ccRCC.
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Affiliation(s)
- T H Ho
- Division of Hematology and Medical Oncology, Mayo Clinic, Scottsdale, AZ, USA.,Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA
| | - I Y Park
- Center for Translational Cancer Research, Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX, USA
| | - H Zhao
- Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - P Tong
- Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - M D Champion
- Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA.,Department of Biomedical Statistics and Informatics, Mayo Clinic, Scottsdale, AZ, USA
| | - H Yan
- Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA.,Department of Biomedical Statistics and Informatics, Rochester, MN, USA
| | - F A Monzon
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, USA
| | - A Hoang
- Department of Genitourinary Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - P Tamboli
- Department of Pathology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - A S Parker
- Department of Health Sciences Research, Mayo Clinic, Jacksonville, FL, USA
| | - R W Joseph
- Division of Hematology and Medical Oncology, Mayo Clinic, Jacksonville, FL, USA
| | - W Qiao
- Division of Quantitative Sciences, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - K Dykema
- Center for Cancer Genomics and Computational Biology, Van Andel Institute, Grand Rapids, MI, USA
| | - N M Tannir
- Department of Genitourinary Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - E P Castle
- Department of Urology, Mayo Clinic, Scottsdale, AZ, USA
| | | | - B T Teh
- Center for Cancer Genomics and Computational Biology, Van Andel Institute, Grand Rapids, MI, USA
| | - J Wang
- Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - C L Walker
- Center for Translational Cancer Research, Institute of Biosciences and Technology, Texas A&M Health Science Center, Houston, TX, USA
| | - M-C Hung
- Department of Molecular and Cellular Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Center for Molecular Medicine and Graduate Institute of Cancer Biology, China Medical University, Taichung, Taiwan
| | - E Jonasch
- Department of Genitourinary Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Song B, Lin JC, Tong P, Wang M, Yang C, Guo XG, Lin S, Sun YP. Strong ferromagnetism beyond the mechanism of uncompensated surface spins in nanocrystalline GaCMn3. RSC Adv 2015. [DOI: 10.1039/c5ra20290f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bulk antiperovskite compound GaCMn3 has an antiferromagnetic ground state. However, in nanocrystalline GaCMn3, strong ferromagnetism with large coercive field beyond the scenario of uncompensated surface spins was observed.
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Affiliation(s)
- B. Song
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - J. C. Lin
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - P. Tong
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - M. Wang
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - C. Yang
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - X. G. Guo
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - S. Lin
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - Y. P. Sun
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
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27
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Mak M, Tong P, Diao L, Ng P, Fan Y, Cardnell R, Gibbons D, William W, Heymach J, Coombes K, Byers L, Wang J. 435 A pan-cancer tumor-derived epithelial-to–mesenchymal transition (EMT) signature determines patterns of drug sensitivity and enrichment in immune target expression following EMT. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70561-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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28
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Zhang S, Jin H, Tong P. A cystic focus filled with soft tissue in femoral head from a haemophilic arthropathy patient: a case report from China. Haemophilia 2014; 21:e80-3. [PMID: 25333668 DOI: 10.1111/hae.12559] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/17/2014] [Indexed: 11/27/2022]
Affiliation(s)
- S. Zhang
- The First College of Clinical Medicine; Zhejiang Chinese Medical University; Hangzhou China
| | - H. Jin
- Institute of Orthapaedic and Traumatology of Zhejiang; Hangzhou China
| | - P. Tong
- The First Hospital Affiliated to Zhejiang Chinese Medical; Hangzhou China
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Guo H, Tong P, Peng Y, Wang T, Liu Y, Chen J, Li Y, Tian Q, Hu Y, Zheng Y, Xiao L, Xiong W, Pan Q, Hu Z, Xia K. Homozygous loss-of-function mutation of the LEPREL1 gene causes severe non-syndromic high myopia with early-onset cataract. Clin Genet 2013; 86:575-9. [PMID: 24172257 DOI: 10.1111/cge.12309] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 10/11/2013] [Accepted: 10/28/2013] [Indexed: 11/28/2022]
Abstract
High myopia is a severe visual impairment which can increase the risk of retinal degeneration, subretinal hemorrhage, choroidal neovascularization, cataract and retinal detachment. We recruited an autosomal-recessive high myopia family, with affected subjects who also present early-onset cataract, retinal degeneration and other complications. Using targeted capturing and whole exome sequencing, we identified a homozygous non-sense mutation in the LEPREL1 gene which causes premature termination of the translation at the fifth amino acid (c.13C>T; p.Q5X), co-segregating with the phenotypes. LEPREL1 encodes a proline hydroxylase called prolyl 3-hydroxylase 2 (P3H2), a 2-oxoglutarate-dependent dioxygenase that hydroxylates collagens. The results show that LEPREL1 plays an important role in eye development and homozygous loss-of-function mutation of this gene can cause severely high myopia and early-onset cataract. Our study also strongly suggests that the disruption of collagen modification is one of the pathogenic mechanisms of high myopia and cataract.
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Affiliation(s)
- H Guo
- State Key Laboratory of Medical Genetics, Changsha, Hunan, China
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Tong P, Lu Z, Chen X, Wang Q, Yu F, Zou P, Yu X, Li Y, Lu L, Chen YH, Jiang S. An engineered HIV-1 gp41 trimeric coiled coil with increased stability and anti-HIV-1 activity: implication for developing anti-HIV microbicides. J Antimicrob Chemother 2013; 68:2533-44. [DOI: 10.1093/jac/dkt230] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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31
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Xi SB, Lu WJ, Wu HY, Tong P, Sun YP. Surface spin-glass, large surface anisotropy, and depression of magnetocaloric effect in La(0.8)Ca(0.2)MnO(3) nanoparticles. J Appl Phys 2012; 112:123903. [PMID: 23319829 PMCID: PMC3537820 DOI: 10.1063/1.4768842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Accepted: 11/07/2012] [Indexed: 06/01/2023]
Abstract
The surface magnetic behavior of La(0.8)Ca(0.2)MnO(3) nanoparticles was investigated. We observed irreversibility in high magnetic field. The surface spin-glass behavior as well as the high-field irreversibility is suppressed by increasing particle size while the freezing temperature T(F) does not change with particle size. The enhanced coercivity has been observed in the particles and we attributed it to the large surface anisotropy. We have disclosed a clear relationship between the particle size, the thickness of the shell, and the saturation magnetization of the particles. The large reduction of the saturation magnetization of the samples is found to be induced by the increase of nonmagnetic surface large since the thickness of the spin-disordered surface layer increases with a decrease in the particle size. Due to the reduction of the magnetization, the magnetocaloric effect (MCE) has been reduced by the decreased particle size since the nonmagnetic surface contributes little to the MCE. Based on the core-shell structure, large relative cooling powers RCP(s) of 180 J/kg and 471 J/kg were predicted for a field change of 2.0 T and 4.5 T, respectively, in the small particles with thin spin-glass layer.
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32
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Xu X, Zhang L, Tong P, Xun G, Su W, Xiong Z, Zhu T, Zheng Y, Luo S, Pan Y, Xia K, Hu Z. Exome sequencing identifiesUPF3Bas the causative gene for a Chinese non-syndrome mental retardation pedigree. Clin Genet 2012; 83:560-4. [DOI: 10.1111/cge.12014] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 09/04/2012] [Accepted: 09/04/2012] [Indexed: 01/04/2023]
Affiliation(s)
| | | | | | - G Xun
- Mental Health Center; Shandong Provincial Mental Health Center; Jinan; Shandong; China
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Ko G, So W, Tong P, Ma R, Kong A, Ozaki R, Yang X, Ho C, Lam C, Chan J. Hypoadiponectinaemia enhances waist circumference as a predictor of glucose intolerance and clustering of risk factors in Chinese men. Diabetes & Metabolism 2010; 36:192-7. [DOI: 10.1016/j.diabet.2009.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Revised: 11/07/2009] [Accepted: 11/10/2009] [Indexed: 11/15/2022]
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Abstract
AIMS To develop a simple scoring system for identifying Southern Chinese at risk of diabetes. METHODS The score was derived from a risk factor matching cohort for Type 2 diabetes in Hong Kong Chinese (cohort 1, 2448 subjects without a history of diabetes; age, mean +/- sd 37.2 +/- 8.9 years, median 36.0 years; 1649 had risk factors for diabetes and 799 were age-matched control subjects from the community). Two other cohorts were used to validate the risk score (cohort 2, 3734 subjects with risk factors for diabetes; and cohort 3, 1513 participants of a community diabetes survey). All subjects had a 75 g oral glucose tolerance test (OGTT). RESULTS In cohort 1, 270 (11%) of the subjects were found to have diabetes on OGTT. A risk score system was derived using the beta values of the corresponding predictors in the logistic regression analysis. The area under the curve (95% confidence intervals) of the score system was 0.735 (0.705, 0.765). The application of a risk score of > or = 16 increased the detection rate 2.5-4 times in all three cohorts. A high post-test probability of diabetes of > 60% was derived from a risk score of > or = 20. Only 10-20 and approximately 5% with a score of > or = 12 and > or = 16, respectively, are indicated for OGTT. This will considerably improve the yield of OGTT screening. CONCLUSIONS A simple risk score identifies young-to-middle-aged Southern Chinese at high risk for diabetes. Subjects with a score of 16 or above (out of 30) should undergo OGTT for definitive diagnosis of diabetes.
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Affiliation(s)
- G Ko
- Hong Kong Institute of Diabetes and Obesity, the Chinese University of Hong Kong, Hong Kong SAR, China.
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36
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Van Geel M, Gattas M, Kesler Y, Tong P, Yan H, Tran K, Steijlen P, Murrell D, Van Steensel M. Phenotypic variability associated with WNT10A
nonsense mutations. Br J Dermatol 2010; 162:1403-6. [DOI: 10.1111/j.1365-2133.2010.09703.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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37
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Chan J, So W, Ko G, Tong P, Yang X, Ma R, Kong A, Wong R, Le Coguiec F, Tamesis B, Wolthers T, Lyubomirsky G, Chow P. The Joint Asia Diabetes Evaluation (JADE) Program: a web-based program to translate evidence to clinical practice in Type 2 diabetes. Diabet Med 2009; 26:693-9. [PMID: 19573118 DOI: 10.1111/j.1464-5491.2009.02751.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS The Joint Asia Diabetes Evaluation (JADE) Program is the first web-based program incorporating a comprehensive risk engine, care protocols, clinical decision and self-management support to improve ambulatory diabetes care. The aim was to validate the risk stratification system of the JADE Program using a large prospective cohort. METHODS The JADE interactive risk engine stratifies patients into different risk levels using results from an annual comprehensive assessment of complications and risk factors. We used a prospective registry consisting of 7534 Type 2 diabetic patients [45.6% men, median (range) age 57 years (13-92)] to perform internal validation of the risk engine. RESULTS The JADE Risk Engine categorized patients into four risk levels (from low to high): level 1, n = 4520 (6%); level 2, n = 1468 (19.5%); level 3, n = 4476 (59.4%); and level 4, n = 1138 (15.1%). After a median follow-up period of 5.5 years (mean +/- sd 5.4 +/- 2.81 years), 763 (10.1%) died, 1129 (14.9%) developed cardiovascular disease (CVD), 282 (3.7%) developed end-stage renal disease and 1400 (18.6%) had at least one of these events. Compared with risk level 1, levels 2, 3 and 4 were associated with 2.8-, 4.7- and 8.6-fold increased risk of clinical end-points. Risk levels 3 and 4 were, respectively, associated with 2.2- and 3.9-fold increased risk for all-cause death and 4.8- and 12.1-fold increased CVD risks. CONCLUSION Based on results from a comprehensive assessment, the JADE Risk Engine successfully categorizes patients into different risk levels to guide clinical management.
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Affiliation(s)
- J Chan
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Shatin, Hong Kong.
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38
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Yeo PSD, Pinheiro L, Tong P, Lim PL, Sitoh YY. Hippocampal involvement in dengue fever. Singapore Med J 2005; 46:647-50. [PMID: 16228099] [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: 05/04/2023]
Abstract
Flaviviruses are among the most important emerging viruses known to man. Dengue is the most common flavivirus infection in Singapore, and is transmitted between humans by the Aedes mosquito. We report a 25-year-old man with dengue fever complicated by selective hippocampal involvement manifesting as amnesia. This has not been described in the literature previously. Dengue polymerase chain reaction and serology were positive. Magnetic resonance imaging of the brain showed bilateral hippocampal involvement.
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Affiliation(s)
- P S D Yeo
- Department of General Medicine, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore 308433.
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39
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Sun C, Xia KQ, Tong P. Three-dimensional flow structures and dynamics of turbulent thermal convection in a cylindrical cell. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 72:026302. [PMID: 16196706 DOI: 10.1103/physreve.72.026302] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2005] [Indexed: 05/04/2023]
Abstract
The technique of particle image velocimetry is used to study the velocity field of turbulent Rayleigh-Bénard convection in an aspect-ratio-1 cylindrical cell filled with water. By measuring the two-dimensional (2D) velocity vector map in different vertical cross sections of the cell, we investigate the 3D structures and dynamics of turbulent thermal convection. The experiment reveals how thermal plumes synchronize their emissions and organize their motions spatially between the top and bottom plates, leading to an oscillatory motion in the bulk region of the fluid with a period equal to twice the plume's cell-crossing time. From the measured instantaneous velocity vector map, we find the phase relationship between the velocity components along different directions and at different positions in a 2D plane. These phase relations illustrate how the convecting fluid in different regions of the cell interact with each other and generate a synchronized and coherent motion in a closed system.
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Affiliation(s)
- Chao Sun
- Department of Physics, The Chinese University of Hong Kong, Shain, Hong Kong, China
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40
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Shang XD, Tong P, Xia KQ. Test of steady-state fluctuation theorem in turbulent Rayleigh-Bénard convection. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 72:015301. [PMID: 16090027 DOI: 10.1103/physreve.72.015301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2004] [Indexed: 05/03/2023]
Abstract
The local entropy production rate sigma (r,t) in turbulent thermal convection is obtained from simultaneous velocity and temperature measurements in an aspect-ratio-one cell filled with water. The statistical properties of the time-averaged sigma (r,t) are analyzed and the results are compared with the predictions of the steady-state fluctuation theorem (SSFT) of Gallavotti and Cohen. The experiment reveals that the SSFT can indeed be extended to the local variables, but further development is needed in order to incorporate the common dynamic complexities of far-from-equilibrium systems into the theory.
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Affiliation(s)
- X-D Shang
- Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA
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41
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Hui ACF, Wong S, Leung CH, Tong P, Mok V, Poon D, Li-Tsang CW, Wong LK, Boet R. A randomized controlled trial of surgery vs steroid injection for carpal tunnel syndrome. Neurology 2005; 64:2074-8. [PMID: 15985575 DOI: 10.1212/01.wnl.0000169017.79374.93] [Citation(s) in RCA: 119] [Impact Index Per Article: 6.3] [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: 11/15/2022] Open
Abstract
BACKGROUND Decompressive surgery and steroid injection are widely used forms of treatment for carpal tunnel syndrome (CTS) but there is no consensus on their effectiveness in comparison to each other. The authors evaluated the efficacy of surgery vs steroid injection in relieving symptoms in patients with CTS. METHODS The authors conducted a randomized, single blind, controlled trial. Fifty patients with electrophysiologically confirmed idiopathic CTS were randomized and assigned to open carpal tunnel release (25 patients) or to a single injection of steroid (25 patients). Patients were followed up at 6 and 20 weeks. The primary outcome was symptom relief in terms of the Global Symptom Score (GSS), which rates symptoms on a scale of 0 (no symptoms) to 50 (most severe). Nerve conduction studies and grip strength measurements were used as secondary outcome assessments. RESULTS At 20 weeks after randomization, patients who underwent surgery had greater symptomatic improvement than those who were injected. The mean improvement in GSS after 20 weeks was 24.2 (SD 11.0) in the surgery group vs 8.7 (SD 13.0) in the injection group (p < 0.001); surgical decompression also resulted in greater improvement in median nerve distal motor latencies and sensory nerve conduction velocity. Mean grip strength in the surgical group was reduced by 1.7 kg (SD 5.1) compared with a gain of 2.4 kg (SD 5.5) in the injection group. CONCLUSION Compared with steroid injection, open carpal tunnel release resulted in better symptomatic and neurophysiologic outcome but not grip strength in patients with idiopathic carpal tunnel syndrome over a 20-week period.
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Affiliation(s)
- A C F Hui
- Division of Neurology, Department of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, China.
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Matson WR, Kalyankar M, Ackerson BJ, Tong P. Concentration and velocity patterns in a horizontal rotating suspension of non-Brownian settling particles. Phys Rev E 2005; 71:031401. [PMID: 15903425 DOI: 10.1103/physreve.71.031401] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2004] [Indexed: 11/07/2022]
Abstract
We report a systematic experimental study of concentration and velocity patterns formed in a horizontal rotating cylinder filled completely with a monodisperse suspension of non-Brownian settling particles. The system shows a series of concentration and velocity patterns, or phases, with varying rotation rate and solvent viscosity. Individual phases are studied using both side and cross-sectional imaging to examine the detailed flow structures. The overall phase diagram of the system is mapped out as a function of the rotation rate and solvent viscosity. Attempts are made to analyze the functional form of the phase boundaries in order to understand the transition mechanism between different phases.
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Affiliation(s)
- W R Matson
- Department of Physics, Oklahoma State University, Stillwater, 74078, USA
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Abstract
We present a scheme to extract the velocity of buoyant structures in turbulent thermal convection from simultaneous local velocity and temperature measurements. Applying this scheme to measurements taken at positions within the convection cell where the buoyant structures are dominated by plumes, we obtain the temperature dependence of the plume velocity and understand our results using the equations of motion. We further obtain the scaling behavior of the average local heat flux in the vertical direction at the cell center with the Rayleigh number and find that the scaling exponent is different from that measured for the Nusselt number. This difference leads to the conclusion that heat cannot be mainly transported through the central region of the convection cell.
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Affiliation(s)
- Emily S C Ching
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, People's Republic of China
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Abstract
A method was developed and validated for the determination of acrylamide in carbohydrate-based foods. Solid-phase extraction employing a mixed-bed anion and cation exchange cartridge in series with a C18 extraction disk was used to clean-up water extracts of food samples before analysis by liquid chromatography coupled with tandem mass spectrometry detection. The limit of detection was calculated as approximately 25 microg kg(-1) and the limit of reporting was 50 microg kg(-1). The average method recovery for 84 samples from a range of matrices reporting was 99% with a relative standard deviation of 11.2%. A survey was conducted of 112 samples of carbohydrate-based foods composited from 547 products available in the Australian market. The analytical results were used in conjunction with Australian food consumption data derived from the 1995 National Nutrition Survey (NNS) to prepare preliminary dietary exposure estimates of Australians to acrylamide through only the food groups examined. Mean dietary exposure to acrylamide resulting from consumption of the foods tested, for Australians aged 2 years and above, was estimated as 22-29 microg day(-1) (equivalent to 0.4-0.5 microg kg(-1) bodyweight day(-1)) and between 73 and 80 microg day(-1) (1.4 and 1.5 microg kg(-1) bodyweight day(-1)) for 95th percentile consumers. Young children (2-6 years) consuming acrylamide-containing foods had a higher acrylamide exposure on a per kilogram bodyweight basis (mean 1.0-1.3 microg kg(-1) bodyweight day(-1)). The estimated exposure of Australians to acrylamide is similar to that estimated for other countries.
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Affiliation(s)
- M Croft
- Research and Development Section, Australian Government Analytical Laboratories, PO Box 385, Pymble, NSW, Australia.
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45
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Shang XD, Qiu XL, Tong P, Xia KQ. Measurements of the local convective heat flux in turbulent Rayleigh-Bénard convection. Phys Rev E Stat Nonlin Soft Matter Phys 2004; 70:026308. [PMID: 15447589 DOI: 10.1103/physreve.70.026308] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2004] [Indexed: 05/24/2023]
Abstract
A systematic study of the local convective heat transport in turbulent thermal convection is carried out in small-aspect-ratio cells filled with water. The local convective heat flux is obtained from the simultaneous velocity and temperature measurements over varying Rayleigh numbers and spatial positions across the entire convection cell. Large fluctuations of the local convective heat flux are found mainly in the vertical direction and they are determined primarily by the thermal plumes in the system. The experiment reveals the spatial distribution of the local convective heat flux in a closed cell and thus settles a long-debated issue on how heat is transported in small-aspect-ratio cells.
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Affiliation(s)
- X-D Shang
- Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA
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46
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Ching ESC, Leung CK, Qiu XL, Tong P. Intermittency of velocity fluctuations in turbulent thermal convection. Phys Rev E Stat Nonlin Soft Matter Phys 2003; 68:026307. [PMID: 14525105 DOI: 10.1103/physreve.68.026307] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2003] [Indexed: 11/07/2022]
Abstract
We analyze velocity fluctuations in turbulent Rayleigh-Bénard convection. The velocity measurements were taken at the center of an aspect-ratio-one convection cell filled with water. The measured probability density functions of the velocity difference over a time interval tau are found to change with tau, indicating that the velocity fluctuations are intermittent. The velocity intermittency can be well characterized by the She-Leveque hierarchical structure. Our analyses further show that the vertical velocity component has distinct statistical features from the horizontal components. This result indicates that the vertical direction is special and buoyancy is important even at the center of the convection cell.
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Affiliation(s)
- Emily S C Ching
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong
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47
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Matson WR, Ackerson BJ, Tong P. Pattern formation in a rotating suspension of non-Brownian settling particles. Phys Rev E Stat Nonlin Soft Matter Phys 2003; 67:050301. [PMID: 12786120 DOI: 10.1103/physreve.67.050301] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2002] [Indexed: 05/24/2023]
Abstract
We report band formation and other pattern formation for a settling suspension of uniform non-Brownian particles in a completely filled horizontal rotating cylinder. The system shows a series of sharp pattern changes that are mapped out as a function of the rotation period and suspension viscosity. The experiment suggests that a large number of patterns and rich dynamics result from the interplay among the viscous drag, and gravitational and centrifugal forces.
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Affiliation(s)
- W R Matson
- Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA
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Shang XD, Qiu XL, Tong P, Xia KQ. Measured local heat transport in turbulent Rayleigh-Bénard convection. Phys Rev Lett 2003; 90:074501. [PMID: 12633232 DOI: 10.1103/physrevlett.90.074501] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2002] [Indexed: 05/24/2023]
Abstract
Local convective heat flux in turbulent thermal convection is obtained from simultaneous velocity and temperature measurements in an aspect-ratio-one convection cell filled with water. It is found that fluctuations of the vertical heat flux are highly intermittent and are determined primarily by the thermal plumes in the system. The experiment reveals a unique mechanism for the heat transport in turbulent convection.
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Affiliation(s)
- X-D Shang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China
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Qiu XL, Tong P. Temperature oscillations in turbulent Rayleigh-Bénard convection. Phys Rev E Stat Nonlin Soft Matter Phys 2002; 66:026308. [PMID: 12241286 DOI: 10.1103/physreve.66.026308] [Citation(s) in RCA: 7] [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: 03/05/2002] [Revised: 03/20/2002] [Indexed: 05/23/2023]
Abstract
A systematic study of temperature oscillations in turbulent thermal convection was carried out in two aspect-ratio-one convection cells filled with water. Temperature correlation functions and local velocity fluctuations were measured over varying Rayleigh numbers and spatial positions across the entire cell. These measurements fully characterize the spatial structure of the temperature oscillation and reveal the mixing and emission dynamics of the thermal plumes near the conducting surface. A sharp transition from a random chaotic state to a correlated turbulent state of finite coherence time is found when the Rayleigh number becomes larger than a critical value Ra(c) approximately equal 5 x 10(7). Above Ra(c) the measured temperature correlation functions show a well-defined oscillation with a finite coherence time. The oscillation period is found to be twice as large as the cell crossing time. The experiment demonstrates how the thermal plumes in a closed cell organize themselves both in space and time and generate coherent oscillations in a turbulent environment.
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Affiliation(s)
- X-L Qiu
- Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA
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