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Liu X, Zhang W, Zhang X, Zhou Z, Wang C, Pan Y, Hu B, Liu C, Pan C, Shen C. Transparent ultrahigh-molecular-weight polyethylene/MXene films with efficient UV-absorption for thermal management. Nat Commun 2024; 15:3076. [PMID: 38594248 PMCID: PMC11004134 DOI: 10.1038/s41467-024-47432-z] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 03/30/2024] [Indexed: 04/11/2024] Open
Abstract
The rational use and conversion of energy are the primary means for achieving the goal of carbon neutrality. MXenes can be used for photothermal conversion, but their opaque appearance limits wider applications. Herein, we successfully develop visible-light transparent and UV-absorbing polymer composite film by solution blending the MXene with polyethylene and then vacuum pressing. The resulting film could be quickly heated to 65 °C under 400 mW cm-2 light irradiation and maintained over 85% visible-light transmittance as well as low haze (<12%). The findings of the indoor heat insulation test demonstrate that the temperature of the glass house model covered by this film was 6-7 °C lower than that of the uncovered model, revealing the potential of transparent film in energy-saving applications. In order to mimic the energy-saving condition of the building in various climates, a typical building model with this film as the outer layer of the window was created using the EnergyPlus building energy consumption software. According to predictions, they could reduce yearly refrigeration energy used by 31-61 MJ m-2, and 3%-12% of the total energy used for refrigeration in such structures. This work imply that the film has wide potential for use as transparent devices in energy-related applications.
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Affiliation(s)
- Xianhu Liu
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, China
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, PR China
| | - Wenrui Zhang
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, China
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, PR China
| | - Xin Zhang
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, China
| | - Zhengui Zhou
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Chunfeng Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, PR China
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Yamin Pan
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, China.
| | - Bin Hu
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, PR China.
| | - Chuntai Liu
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, China.
| | - Caofeng Pan
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, PR China.
- Institute of Atomic Manufacturing, Beihang University, Beijing, 100191, China.
| | - Changyu Shen
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, China
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Xie F, Wang T, Li Y, Pan Y, Guo P, Liu C, Shen C, Liu X. Ag Nanoparticles-Coated Shish-Kebab Superstructure Film for Wearable Heater. ACS Appl Mater Interfaces 2023. [PMID: 38040021 DOI: 10.1021/acsami.3c14848] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2023]
Abstract
Passive and active wearable heaters have received widespread attention due to their efficient utilization of solar energy and all-weather heating capabilities, but the current challenges are their preparation processes being time-consuming and equipment expensive. Herein, a simple and facilitated preparation method for the multifunctional wearable heater was developed, which springs Ag nanoparticles on the shish-kebab superstructure film via deposited melanin-like polydopamine as the adhesive. The light absorption ability of the resultant wearable heater in the visible region can be significantly enhanced by the addition of polydopamine, realizing a highly efficient photothermal conversion ability. Accordingly, it can achieve rapid warming ability whether passive heating (up to 45 °C about 60 s at 100 mW/cm2) or active heating (up to 72 °C about 40 s at 0.6 V), compared to ordinary cotton fabric. In addition, it can realize a 6.3 °C temperature difference with Cotton, showing excellent heat preservation ability. This study demonstrates a simple and low-cost approach for the prepared shish-kebab superstructure-based wearable heaters.
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Affiliation(s)
- Fengsen Xie
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Tengrui Wang
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Yingnuo Li
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Yamin Pan
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Pan Guo
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Chuntai Liu
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Changyu Shen
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Xianhu Liu
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
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Wang Y, Wang T, Liang J, Wu J, Yang M, Pan Y, Hou C, Liu C, Shen C, Tao G, Liu X. Controllable-morphology polymer blend photonic metafoam for radiative cooling. Mater Horiz 2023; 10:5060-5070. [PMID: 37661692 DOI: 10.1039/d3mh01008b] [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: 09/05/2023]
Abstract
Incorporating radiative cooling photonic structures into the cooling systems of buildings presents a novel strategy to mitigate global warming and boost global carbon neutrality. Photonic structures with excellent solar reflection and thermal emission can be obtained by a rational combination of different materials. The current preparation strategies of radiative cooling materials are dominated by doping inorganic micro-nano particles into polymers, which usually possess insufficient solar reflectance. Here, a porous polymer metafoam was prepared with polycarbonate (PC) and polydimethylsiloxane (PDMS) using a simple thermally induced phase separation method. The metafoam exhibits strong solar reflectivity (97%), superior thermal emissivity (91%), and low thermal conductivity (46 mW m-1 K-1) due to the controllable morphology of the randomly dispersed light-scattering air voids. Cooling tests demonstrate that the metafoam could reduce the average temperature by 5.2 °C and 10.2 °C during the daytime and nighttime, respectively. In addition, the simulation of a cooling energy system of buildings indicates that the metafoam can save 3.2-26.7 MJ m-2 per year in different cities, which is an energy-saving percentage of 14.7-41%. The excellent comprehensive performances, including the passive cooling property, thermal insulation and self-cleaning of the metafoam makes it appropriate for practical outdoor applications, exhibiting its great potential as an energy-saving building cooling material.
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Affiliation(s)
- Yajie Wang
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
| | - Tiecheng Wang
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
| | - Jun Liang
- Wuhan National Laboratory for Optoelectronics, School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
| | - Jiawei Wu
- Wuhan National Laboratory for Optoelectronics, School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
| | - Maiping Yang
- Wuhan National Laboratory for Optoelectronics, School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
| | - Yamin Pan
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
| | - Chong Hou
- Wuhan National Laboratory for Optoelectronics, School of Optics and Electronic Information, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
| | - Chuntai Liu
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
| | - Changyu Shen
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
| | - Guangming Tao
- Wuhan National Laboratory for Optoelectronics, School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China.
| | - Xianhu Liu
- College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China.
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Wang X, Zhang J, Wang Y, Qin S, Pan Y, Tu Y, Liu X. Superhydrophobic Thermoplastic Polyurethane Foam Fabricated by Phase Separation and Silica Coating for Oil-Water Separation. Macromol Rapid Commun 2023; 44:e2300333. [PMID: 37573031 DOI: 10.1002/marc.202300333] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/25/2023] [Indexed: 08/14/2023]
Abstract
Oil spills and the presence of oily wastewater have resulted in substantial ecological damage. Superhydrophobic polymer foam with selectivity and adsorption capacity is a promising candidate for efficient oil-water separation. In this study, a method that combines phase separation and silica coating to produce superhydrophobic thermoplastic polyurethane (TPU) foam is proposed. The TPU foam demonstrates superhydrophobicity with a water contact angle of 155.62°, and exhibits a maximum saturated adsorption capacity of 54.11 g g-1 . Furthermore, the foam can be utilized as a filter for oil-water separation, maintaining its filtration efficiency (41.2 m3 m2 h-1 ) even after ten filtration cycles.
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Affiliation(s)
- Xiaolong Wang
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, P. R. China
- Équipe de Recherche sur les Processus Innovatifs (ERPI), Université de Lorraine, Nancy, 54000, France
| | - Jingna Zhang
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China
| | - Yiding Wang
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China
| | - Shengxue Qin
- College of Mechanical and Electrical Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, P. R. China
| | - Yamin Pan
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, P. R. China
| | - Yongqiang Tu
- College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen, 361021, P. R. China
| | - Xianhu Liu
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Wenhua Road 97-1, Zhengzhou, 450002, P. R. China
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Liu X, Li Y, Pan Y, Zhou Z, Zhai Z, Liu C, Shen C. A Shish-Kebab Superstructure Film for Personal Radiative Cooling. ACS Appl Mater Interfaces 2023; 15:17188-17194. [PMID: 36946512 DOI: 10.1021/acsami.3c00120] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Due to global warming and the energy crisis, incorporating passive radiative cooling into personal thermal management has attracted extensive attention. However, developing a wearable textile that reflects incoming sunlight and allows mid-infrared radiation transmission is still a tough challenge. Herein, a shish-kebab superstructure film was produced via a flow-induced crystallization strategy for personal radiative cooling. The resulting film endowed a high infrared transmittance (87%) and improved sunlight reflectivity (83%). A device was developed to simulate the human body skin, and the temperatures of the shish-kebab film were 2.5 and 2.6 °C lower than that of traditional textile in outdoor and indoor tests, respectively. In order to make the shish-kebab film more wearable, a series of modifications were then carried out. This study demonstrates the substantial potential to personal thermal management textiles.
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Affiliation(s)
- Xianhu Liu
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, Henan 450002, China
| | - Yingnuo Li
- National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, Henan 450002, China
| | - Yamin Pan
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Zhenyu Zhou
- Zhongkexin Engineering Consulting (Beijjing) Co., Ltd., Beijing 100039, China
| | - Zhanyu Zhai
- College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan 410083, China
| | - Chuntai Liu
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, Henan 450002, China
| | - Changyu Shen
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, Henan 450002, China
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Hou Y, Pan Y, Zhou Z, Liu C, Shen C, Liu X. Review on Cell Structure Regulation and Performances Improvement of Porous Poly (Lactic Acid). Macromol Rapid Commun 2023; 44:e2300065. [PMID: 36960581 DOI: 10.1002/marc.202300065] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/13/2023] [Indexed: 03/25/2023]
Abstract
Recent advances in the cell structure regulation and performances improvement of porous poly (lactic acid) (PLA) materials (PPMs) are systematically reviewed in this feature article. Firstly, the typical processing methods, including template method, non-solvent induced phase separation (NIPS), freeze-drying, supercritical CO2 foaming and so on, of PPMs are introduced emphatically. Their various cell morphologies by different processing methods are summarized: finger-like, honeycomb-like, fiber-like, through cell, open cell, closed cell, ball-like and flower-like. Meanwhile, the transformation among different cell morphologies as well as the changes in cell size and cell density, having impact on the performances, are described. Secondly, the influence of stereo-complex crystals on the cell structure of PPMs is emphatically reviewed. Furthermore, the relationships between cell structure and properties that includes mechanical properties, thermal stability, heat insulation and hydrophobicity, are elaborated. Eventually, the issues of PPMs worthy of further study are discussed in this paper. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Yangzhe Hou
- College of Materials Science and Engineering, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Wenhua Road 97-1, Zhengzhou University, Zhengzhou, 450002, P. R. China
| | - Yamin Pan
- College of Materials Science and Engineering, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Wenhua Road 97-1, Zhengzhou University, Zhengzhou, 450002, P. R. China
| | - Zhenyu Zhou
- Zhongkexin Engineering Consulting (Beijjing) Co. Ltd., Beijing, 100039, China
| | - Chuntai Liu
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Wenhua Road 97-1, Zhengzhou University, Zhengzhou, 450002, P. R. China
| | - Changyu Shen
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Wenhua Road 97-1, Zhengzhou University, Zhengzhou, 450002, P. R. China
| | - Xianhu Liu
- State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Wenhua Road 97-1, Zhengzhou University, Zhengzhou, 450002, P. R. China
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Zhang L, Hu X, Meng Q, Li Y, Shen H, Fu Y, Zhang F, Chen J, Zhang W, Chang W, Pan Y. SHP2 inhibition improves celastrol-induced growth suppression of colorectal cancer. Front Pharmacol 2022; 13:929087. [PMID: 36120370 PMCID: PMC9477229 DOI: 10.3389/fphar.2022.929087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 08/02/2022] [Indexed: 11/13/2022] Open
Abstract
This study aimed to explore novel targets for celastrol sensitization in colorectal cancer (CRC) based on differentially regulated signals in response to high- or low-dose celastrol. Targeting signals were investigated using Western blotting or phosphorylated receptor tyrosine kinase (RTK) arrays. Corresponding inhibitors for the signals were individually combined with low-dose celastrol for the assessment of combined anti-CRC effects, based on proliferation, apoptosis, colony assays, and xenograft models. The potential mechanism for the combination of celastrol and SHP2 inhibition was further examined. Low-dose celastrol (<1 µM) did not effectively suppress AKT and ERK signals in CRC cells compared to high-dose celastrol (>1 µM). However, when combined with an AKT or ERK inhibitor, low-dose celastrol could cooperatively suppress CRC proliferation. Furthermore, failed AKT or ERK inhibition by low-dose celastrol may be due to reactivated RTK-SHP2 signaling with negative feedback. The combination of celastrol and the SHP2 inhibitor resulted in greatly reduced AKT and ERK signals, as well as greater inhibition of CRC growth than celastrol alone. Moreover, the mechanism underlying combination suppression was also involved in the activation of immune cell infiltration (mainly for CD8+ cells) in CRC tissues. Failure to inhibit RTK-SHP2-AKT/ERK signaling contributed to the lack of CRC growth suppression by low-dose celastrol. However, the combination of celastrol and the SHP2 inhibitor resulted in synergistic inhibition of CRC growth and provided a promising therapeutic target.
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Affiliation(s)
- Linxi Zhang
- Department of Navy Environmental and Occupational Health, Faculty of Naval Medicine, Navy Military Medical University, Shanghai, China
- Department of Digestive Endoscopy, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xuefei Hu
- Department of Navy Environmental and Occupational Health, Faculty of Naval Medicine, Navy Military Medical University, Shanghai, China
| | - Qingying Meng
- Department of Colorectal Surgery, Changhai Hospital, Navy Military Medical University, Shanghai, China
| | - Ye Li
- Department of Digestive Endoscopy, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hao Shen
- Department of Navy Environmental and Occupational Health, Faculty of Naval Medicine, Navy Military Medical University, Shanghai, China
| | - Yating Fu
- Department of Navy Environmental and Occupational Health, Faculty of Naval Medicine, Navy Military Medical University, Shanghai, China
| | - Fan Zhang
- Department of Navy Environmental and Occupational Health, Faculty of Naval Medicine, Navy Military Medical University, Shanghai, China
| | - Jiahui Chen
- Department of Navy Environmental and Occupational Health, Faculty of Naval Medicine, Navy Military Medical University, Shanghai, China
| | - Wei Zhang
- Department of Colorectal Surgery, Changhai Hospital, Navy Military Medical University, Shanghai, China
- *Correspondence: Yamin Pan, ; Wenjun Chang, ; Wei Zhang,
| | - Wenjun Chang
- Department of Navy Environmental and Occupational Health, Faculty of Naval Medicine, Navy Military Medical University, Shanghai, China
- *Correspondence: Yamin Pan, ; Wenjun Chang, ; Wei Zhang,
| | - Yamin Pan
- Department of Digestive Endoscopy, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- *Correspondence: Yamin Pan, ; Wenjun Chang, ; Wei Zhang,
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Pan Y, Li E, Wang Y, Liu C, Shen C, Liu X. Simple Design of a Porous Solar Evaporator for Salt-Free Desalination and Rapid Evaporation. Environ Sci Technol 2022; 56:11818-11826. [PMID: 35925900 DOI: 10.1021/acs.est.2c03240] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Solar-driven interfacial evaporation is considered to be one of the promising and efficient ways of producing clean water in recent years. However, it remains a challenge to develop solar evaporation devices with high solar evaporation rates and salt-free blocking properties. Here, a porous solar evaporator with directed water transport and salt-free desalination through excellent photothermal conversion and purposefully guided migration of the salt solution was developed. The designed porous photothermal sponge with the synergistic effect of MXene and polypyrrole can achieve evaporation rates of 1.47 and 2.27 kg m-2 h-1, respectively, in the capillary model and siphon model water-transporting solar evaporation devices. More interestingly, the designed zigzag-shaped device with an evaporation rate of 2.45 kg m-2 h-1 was achieved. In addition, the evaporator can operate stably under 9 h in the siphon model solar evaporation device and achieves the effect of salt-free desalination. The above design provides a good strategy for solar-powered desalination applications.
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Affiliation(s)
- Yamin Pan
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - En Li
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Yajie Wang
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Chuntai Liu
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Changyu Shen
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Xianhu Liu
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
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Cheng H, Pan Y, Wang X, Liu C, Shen C, Schubert DW, Guo Z, Liu X. Correction to: Ni Flower/MXene-Melamine Foam Derived 3D Magnetic/Conductive Networks for Ultra-Efficient Microwave Absorption and Infrared Stealth. Nanomicro Lett 2022; 14:116. [PMID: 35482164 PMCID: PMC9051000 DOI: 10.1007/s40820-022-00820-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Affiliation(s)
- Haoran Cheng
- Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Yamin Pan
- Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Xin Wang
- Institute of Polymer Materials, Friedrich-Alexander-University Erlangen-Nuremberg, Martensstr. 7, 91058, Erlangen, Germany
| | - Chuntai Liu
- Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Changyu Shen
- Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Dirk W Schubert
- Institute of Polymer Materials, Friedrich-Alexander-University Erlangen-Nuremberg, Martensstr. 7, 91058, Erlangen, Germany
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Xianhu Liu
- Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, People's Republic of China.
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Cheng H, Pan Y, Wang X, Liu C, Shen C, Schubert DW, Guo Z, Liu X. Ni Flower/MXene-Melamine Foam Derived 3D Magnetic/Conductive Networks for Ultra-Efficient Microwave Absorption and Infrared Stealth. Nanomicro Lett 2022; 14:63. [PMID: 35190917 PMCID: PMC8861240 DOI: 10.1007/s40820-022-00812-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 01/22/2022] [Indexed: 05/14/2023]
Abstract
The development of multifunctional and efficient electromagnetic wave absorbing materials is a challenging research hotspot. Here, the magnetized Ni flower/MXene hybrids are successfully assembled on the surface of melamine foam (MF) through electrostatic self-assembly and dip-coating adsorption process, realizing the integration of microwave absorption, infrared stealth, and flame retardant. Remarkably, the Ni/MXene-MF achieves a minimum reflection loss (RLmin) of - 62.7 dB with a corresponding effective absorption bandwidth (EAB) of 6.24 GHz at 2 mm and an EAB of 6.88 GHz at 1.8 mm. Strong electromagnetic wave absorption is attributed to the three-dimensional magnetic/conductive networks, which provided excellent impedance matching, dielectric loss, magnetic loss, interface polarization, and multiple attenuations. In addition, the Ni/MXene-MF endows low density, excellent heat insulation, infrared stealth, and flame-retardant functions. This work provided a new development strategy for the design of multifunctional and efficient electromagnetic wave absorbing materials.
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Affiliation(s)
- Haoran Cheng
- Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Yamin Pan
- Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Xin Wang
- Institute of Polymer Materials, Friedrich-Alexander-University Erlangen-Nuremberg, Martensstr. 7, 91058, Erlangen, Germany
| | - Chuntai Liu
- Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Changyu Shen
- Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Dirk W Schubert
- Institute of Polymer Materials, Friedrich-Alexander-University Erlangen-Nuremberg, Martensstr. 7, 91058, Erlangen, Germany
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Xianhu Liu
- Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, People's Republic of China.
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Li Y, Yuan Y, Zhang F, Guo A, Cao F, Song M, Fu Y, Xu X, Shen H, Zheng S, Pan Y, Chang W. Therapeutic Suppression of FAK-AKT Signaling Overcomes Resistance to SHP2 Inhibition in Colorectal Carcinoma. Front Pharmacol 2021; 12:739501. [PMID: 34790119 PMCID: PMC8591248 DOI: 10.3389/fphar.2021.739501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 10/18/2021] [Indexed: 02/05/2023] Open
Abstract
SHP2 mediates signaling from multiple receptor tyrosine kinases (RTKs) to extracellular signal-regulated kinase (ERK) and Ser and Thr kinase AKT, and its inhibitors offer an unprecedented opportunity for cancer treatment. Although the ERK signaling variation after SHP2 inhibition has been well investigated, the AKT signaling variation in colorectal carcinoma (CRC) is still unknown. Therefore, we performed immunohistochemistry and bioinformatics analyses to explore the significance of p-SHP2 in CRC. A panel of CRC cell lines with the SHP2 inhibitor, SHP099, was used to assess the effects on viability and signaling. The inhibitors of AKT and focal adhesion kinase (FAK) signaling were examined in combination with SHP099 as potential strategies to enhance the efficacy and overcome resistance. Frequent resistance to the SHP2 inhibitor was observed in CRC cells, even in those without RAS mutations. We observed rapid adaptive reactivation of the AKT pathway in response to SHP2 inhibition, possibly driven by the reactivation of RTKs or released p-FAK. High baseline p-FAK may also be associated with CRC cell resistance to SHP2 inhibition. Co-inhibition of FAK abrogated the feedback reactivation of AKT in response to SHP2 inhibition. Moreover, the combined inhibition of SHP2 with AKT or FAK resulted in sustained AKT pathway suppression and improved antitumor efficacy in vitro and in vivo. Our study found that reactivation of the AKT pathway is a key mechanism of adaptive resistance to SHP2 inhibition, highlighting the potential significance of AKT and FAK inhibition strategies to enhance the efficacy of SHP2 inhibitors in CRC treatment.
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Affiliation(s)
- Ye Li
- Department of Digestive Endoscopy, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Department of Environmental and Occupational Health, Second Military Medical University, Shanghai, China
| | - Yuncang Yuan
- Laboratory of Animal Tumor Models, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Fan Zhang
- Department of Environmental and Occupational Health, Second Military Medical University, Shanghai, China
| | - Aizhen Guo
- Department of General Practice, Yangpu Center Hospital, Medical School of Tongji University, Shanghai, China
| | - Fuao Cao
- Department of Colorectal Surgery, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Mengmeng Song
- Department of Gastrointestinal Surgery/Clinical Nutrition, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Yating Fu
- Department of Environmental and Occupational Health, Second Military Medical University, Shanghai, China
| | - Xiaowen Xu
- Department of Digestive Endoscopy, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hao Shen
- Department of Environmental and Occupational Health, Second Military Medical University, Shanghai, China
| | | | - Yamin Pan
- Department of Digestive Endoscopy, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Wenjun Chang
- Department of Environmental and Occupational Health, Second Military Medical University, Shanghai, China
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12
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Jia Y, Pan Y, Wang C, Liu C, Shen C, Pan C, Guo Z, Liu X. Flexible Ag Microparticle/MXene-Based Film for Energy Harvesting. Nanomicro Lett 2021; 13:201. [PMID: 34559322 PMCID: PMC8463646 DOI: 10.1007/s40820-021-00729-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 08/31/2021] [Indexed: 05/10/2023]
Abstract
Ultra-thin flexible films have attracted wide attention because of their excellent ductility and potential versatility. In particular, the energy-harvesting films (EHFs) have become a research hotspot because of the indispensability of power source in various devices. However, the design and fabrication of such films that can capture or transform different types of energy from environments for multiple usages remains a challenge. Herein, the multifunctional flexible EHFs with effective electro-/photo-thermal abilities are proposed by successive spraying Ag microparticles and MXene suspension between on waterborne polyurethane films, supplemented by a hot-pressing. The optimal coherent film exhibits a high electrical conductivity (1.17×104 S m-1), excellent Joule heating performance (121.3 °C) at 2 V, and outstanding photo-thermal performance (66.2 °C within 70 s under 100 mW cm-1). In addition, the EHFs-based single-electrode triboelectric nanogenerators (TENG) give short-circuit transferred charge of 38.9 nC, open circuit voltage of 114.7 V, and short circuit current of 0.82 μA. More interestingly, the output voltage of TENG can be further increased via constructing the double triboelectrification layers. The comprehensive ability for harvesting various energies of the EHFs promises their potential to satisfy the corresponding requirements.
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Affiliation(s)
- Yunpeng Jia
- College of Materials Science and Engineering, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Yamin Pan
- College of Materials Science and Engineering, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Chunfeng Wang
- National Center for Nanoscience and Technology (NCNST), Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, People's Republic of China
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China
| | - Chuntai Liu
- College of Materials Science and Engineering, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Changyu Shen
- College of Materials Science and Engineering, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, People's Republic of China
| | - Caofeng Pan
- National Center for Nanoscience and Technology (NCNST), Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, People's Republic of China
| | - Zhanhu Guo
- Integrated Composites Laboratory, Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Xianhu Liu
- College of Materials Science and Engineering, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, People's Republic of China.
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13
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Li E, Pan Y, Wang C, Liu C, Shen C, Pan C, Liu X. Asymmetric Superhydrophobic Textiles for Electromagnetic Interference Shielding, Photothermal Conversion, and Solar Water Evaporation. ACS Appl Mater Interfaces 2021; 13:28996-29007. [PMID: 34101415 DOI: 10.1021/acsami.1c07976] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Flexible and multifunctional textiles have potential applications in self-cleaning and portable electronic product applications, but the current problem that needs to be solved is to maintain their inherent breathability and flexibility while expanding other functional applications. Herein, we adopt the layer-by-layer assembly method to develop a multifunctional textile with superior asymmetric superhydrophobicity, excellent electromagnetic interference (EMI) shielding, outstanding photothermal conversion, and solar water evaporation. The synergistic effect of SiO2 nanoparticles/poly(dimethylsiloxane) (PDMS) and 1H,1H,2H,2H-perfluorooctyltriethoxysilane (PFOTES) endows the textile with a water contact angle of 160°. MXene provides high conductivity (1200 S/m) and EMI shielding effects (36 dB) for multifunctional textiles. In addition, the multifunctional textile exhibits excellent photothermal conversion, and satisfactory solar water evaporation efficiency (80%) and rate (1.22 kg/(m2 h)) under 1 sun. Therefore, the prepared multifunctional textile has great potential in multiscene applications.
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Affiliation(s)
- En Li
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Henan Province Industrial Technology Research Institute of Resources and Materials, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Yamin Pan
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Henan Province Industrial Technology Research Institute of Resources and Materials, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Chunfeng Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing 100083, China
| | - Chuntai Liu
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Henan Province Industrial Technology Research Institute of Resources and Materials, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Changyu Shen
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Henan Province Industrial Technology Research Institute of Resources and Materials, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
| | - Caofeng Pan
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing 100083, China
| | - Xianhu Liu
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Henan Province Industrial Technology Research Institute of Resources and Materials, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou 450002, China
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14
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Su M, Pan Y, Zheng G, Liu C, Shen C, Liu X. An ultra-light, superhydrophobic and thermal insulation ultra-high molecular weight polyethylene foam. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123528] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Zhang L, Xu X, Pan Y, Cao F. High expression of SH2B adaptor protein 1 (SH2B1) indicates poor prognosis in colorectal cancer. Neoplasma 2021; 68:490-497. [PMID: 33502889 DOI: 10.4149/neo_2021_201015n1092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 12/01/2020] [Indexed: 11/08/2022]
Abstract
SH2B1, an adaptor protein associated with obesity, is closely related to the occurrence and development of a variety of tumors. To investigate the clinical significance of SH2B1 in colorectal cancer (CRC), expression of SH2B1 in colorectal normal tissues, adenomas, paracarcinoma tissues, carcinoma tissues, and metastatic tissues from 1003 CRC patients was detected by immunohistochemistry (IHC). The prediction power of SH2B1 for CRC prognosis was evaluated by Kaplan-Meier survival analysis and Cox regression model. Results revealed the expression of SH2B1 in carcinoma tissues was significantly higher than that in other tissues. High expression of SH2B1 was an independent risk factor for both disease-free survival (DFS) and disease-specific survival (DSS) and predicted unfavorable prognosis of CRC as well as poor chemotherapeutic response. Conclusively, SH2B1 can serve as an effective predictor for CRC survival and chemotherapeutic outcomes.
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Affiliation(s)
- Linxi Zhang
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiaowen Xu
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yamin Pan
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Fuao Cao
- Department of Colorectal Surgery, Sanghai Hospital, Second Military Medical University, Shanghai, China
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16
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Yuan H, Pan Y, Wang X, Chen Q, Hu Q, Shao C, Guo Z, Liu C, Shen C, Liu X. Simple water tunable polyurethane microsphere for super-hydrophobic dip-coating and oil-water separation. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122833] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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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17
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Wang X, Pan Y, Liu X, Liu H, Li N, Liu C, Schubert DW, Shen C. Facile Fabrication of Superhydrophobic and Eco-Friendly Poly(lactic acid) Foam for Oil-Water Separation via Skin Peeling. ACS Appl Mater Interfaces 2019; 11:14362-14367. [PMID: 30916921 DOI: 10.1021/acsami.9b02285] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Superhydrophobic polymer foams are a good candidate for oil absorption because of their lightweight and tunable porosity and have promising applications in the long-term application of oil-water separation. However, developing a facile and green strategy to fabricate pure polymer foams with superhydrophobicity and eco-friendliness for large-scale oil-water separation remains a challenge. Here, a facile template-free water-assisted thermally impacted phase separation approach combined with skin peeling for the fabrication of superhydrophobic and eco-friendly pure poly(lactic acid) (PLA) foam for oil-water separation is proposed for the first time. The PLA foam with special micro- and nanostructures possesses a water contact angle of 151°, and the maximum saturated adsorption capacity is 31.5 g/g. More importantly, during the continuous oil-water pumping experiment, the foam has an efficiency of 98% and could maintain for more than 15 h, showing a promising prospect for cleaning large-scale oil pollution.
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Affiliation(s)
- Xiaolong Wang
- College of Materials Science and Engineering and National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education) , Zhengzhou University , Zhengzhou 450002 , China
| | - Yamin Pan
- College of Materials Science and Engineering and National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education) , Zhengzhou University , Zhengzhou 450002 , China
| | - Xianhu Liu
- College of Materials Science and Engineering and National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education) , Zhengzhou University , Zhengzhou 450002 , China
- Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices , East China University of Technology , Nanchang 330013 , China
| | - Hu Liu
- College of Materials Science and Engineering and National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education) , Zhengzhou University , Zhengzhou 450002 , China
| | | | - Chuntai Liu
- College of Materials Science and Engineering and National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education) , Zhengzhou University , Zhengzhou 450002 , China
| | | | - Changyu Shen
- College of Materials Science and Engineering and National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education) , Zhengzhou University , Zhengzhou 450002 , China
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18
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Zhang X, Pan Y, Zhao J, Hao X, Wang Y, Schubert DW, Liu C, Shen C, Liu X. Facile Construction of Copper Mesh Surface from Superhydrophilic to Superhydrophobic for Various Oil-Water Separations. ACTA ACUST UNITED AC 2019. [DOI: 10.30919/es8d505] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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19
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Wang X, Pan Y, Shen C, Liu C, Liu X. Facile Thermally Impacted Water-Induced Phase Separation Approach for the Fabrication of Skin-Free Thermoplastic Polyurethane Foam and Its Recyclable Counterpart for Oil-Water Separation. Macromol Rapid Commun 2018. [DOI: 10.1002/marc.201870060] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Wang X, Pan Y, Shen C, Liu C, Liu X. Facile Thermally Impacted Water-Induced Phase Separation Approach for the Fabrication of Skin-Free Thermoplastic Polyurethane Foam and Its Recyclable Counterpart for Oil-Water Separation. Macromol Rapid Commun 2018; 39:e1800635. [DOI: 10.1002/marc.201800635] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 09/30/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Xiaolong Wang
- National Engineering Research Center for Advanced Polymer Processing Technology; Zhengzhou University; Zhengzhou 450002 China
| | - Yamin Pan
- Key Laboratory of Materials Processing and Mold; Ministry of Education; Zhengzhou University; Zhengzhou 450002 China
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Changyu Shen
- National Engineering Research Center for Advanced Polymer Processing Technology; Zhengzhou University; Zhengzhou 450002 China
- Key Laboratory of Materials Processing and Mold; Ministry of Education; Zhengzhou University; Zhengzhou 450002 China
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Chuntai Liu
- National Engineering Research Center for Advanced Polymer Processing Technology; Zhengzhou University; Zhengzhou 450002 China
- Key Laboratory of Materials Processing and Mold; Ministry of Education; Zhengzhou University; Zhengzhou 450002 China
| | - Xianhu Liu
- National Engineering Research Center for Advanced Polymer Processing Technology; Zhengzhou University; Zhengzhou 450002 China
- Key Laboratory of Materials Processing and Mold; Ministry of Education; Zhengzhou University; Zhengzhou 450002 China
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Huang X, Pan Y, Ma J, Kang Z, Xu X, Zhu Y, Chen J, Zhang W, Chang W, Zhu J. Prognostic significance of the infiltration of CD163 + macrophages combined with CD66b + neutrophils in gastric cancer. Cancer Med 2018; 7:1731-1741. [PMID: 29573574 PMCID: PMC5943426 DOI: 10.1002/cam4.1420] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 02/01/2018] [Accepted: 02/05/2018] [Indexed: 12/28/2022] Open
Abstract
The polarization of tumor-associated macrophages (TAMs) and tumor-associated neutrophils (TANs), especially from the antitumoral phenotype to the protumoral phenotype under certain conditions, has an important influence on the progression of tumors. However, the interactions and combined prognosis of these cells are poorly known. Here, we detected the infiltration of CD68+ TAMs, CD163+ TAMs, and CD66b+ TANs in the specimens from 662 patients with GC by immunohistochemistry. The results showed that the infiltration of each of CD163+ , CD68+ , and CD66b+ cells in GC tissue was significantly increased and independently associated with GC prognosis. Strong collinearity (r = 0.690, P < 0.001) was found between the infiltration of CD163+ and CD68+ cells in GC, and multivariate Cox analysis confirmed the infiltration of CD163+ cells was a better predictor for prognosis than that of CD68+ cells. The combination of the infiltration of CD163+ and CD66b+ cells provided more accurate survival prediction than any individual marker. Patient subgroups with CD66blow CD163low (hazard ratio (HR) = 2.161; 95% confidence interval (CI) = 1.266-3.688; P < 0.001), CD66bhigh CD163high (HR = 3.575; 95% CI = 2.155-5.933; P < 0.001), and CD66blow CD163high (HR = 7.514; 95% CI = 4.583-12.312; P < 0.001) were gradually associated with shorter DFS when compared with the subgroup with CD66bhigh CD163low . The similar result was also for DSS among the subgroups. Moreover, the two-marker model could more effectively discriminate the prognosis among the patients with chemotherapy than that among those without chemotherapy. We concluded that CD163+ TAMs were a more valuable prognostic marker than CD68+ TAMs, and CD163+ TAMs combined with CD66b+ TANs could more precisely predict the prognosis of patients with GC.
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Affiliation(s)
- Xiaopei Huang
- Department of Health ToxicologySecond Military Medical UniversityShanghai 200433China
- Department of Environmental HygieneSecond Military Medical UniversityShanghai 200433China
| | - Yamin Pan
- The First Department of EndoscopyShuguang HospitalShanghai University of Traditional Chinese MedicineShanghai 201203China
| | - Jun Ma
- Department of Colorectal SurgeryChanghai HospitalSecond Military Medical UniversityShanghai 200433China
| | - Zhengchun Kang
- Department of Colorectal SurgeryChanghai HospitalSecond Military Medical UniversityShanghai 200433China
| | - Xiaowen Xu
- Department of Colorectal SurgeryChanghai HospitalSecond Military Medical UniversityShanghai 200433China
| | - Yan Zhu
- Department of PathologyChanghai HospitalSecond Military Medical UniversityShanghai 200433China
| | - Jikuai Chen
- Department of Health ToxicologySecond Military Medical UniversityShanghai 200433China
| | - Wei Zhang
- Department of Colorectal SurgeryChanghai HospitalSecond Military Medical UniversityShanghai 200433China
| | - Wenjun Chang
- Department of Environmental HygieneSecond Military Medical UniversityShanghai 200433China
| | - Jiangbo Zhu
- Department of Health ToxicologySecond Military Medical UniversityShanghai 200433China
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22
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Ye CF, Pan YM, Zhou H. Regulation of vitamin D receptor and Genistein on bone metabolism in mouse osteoblasts and the molecular mechanism of osteoporosis. J BIOL REG HOMEOS AG 2018; 32:497-505. [PMID: 29921374] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The aim of this work was to study the mechanisms of vitamin D receptor (VDR) and Genistein (Gen) on the regulation of bone metabolism of phytoestrogens from cellular and epidemiological perspectives. MC3T3-E1 cells were treated with different concentrations of Gen, and the cell-proliferation rate was detected by an MTT colorimetric assay. The effect of the VDR receptor blocker ZK159222 on the Gen effect was then observed; after adding Gen to MC3T3-E1 cells, we detected the expression of VDR protein via Western blotting. After adding estrogen receptor α-blocker MPP and estrogen receptor β-blocker PHTPP, we observed the effect of Gen on the regulation of the VDR protein. DNA was extracted from the blood samples of 200 postmenopausal women in the early epidemiological survey, and the restriction fragment length polymorphism of VDR gene Apa I and Bsm I in each sample was observed. The results were analyzed using dietary survey and bone mineral density examination. The results show that 10-8mol/L Gen can promote the proliferation of MC3T3-E1 cells (P less than 0.05). This effect can be canceled by the VDR blocker ZK159222. By analyzing the Apa I and Bsm I genotypes of VDR restriction sites, we discovered no significant difference in bone mineral density (BMD) between different genotypes (P>0.05). In addition, there was no significant correlation between dietary phytoestrogen intake and BMD in different genotypes (P>0.05). In conclusion, VDR can mediate the effect of Gen on the proliferation of MC3T3-E1 cells. The up-regulated expression of VDR protein in Gen is not mediated by the estrogen receptor. Moreover, the VDR gene polymorphism is not related to the BMD in various parts and is not related to the bone metabolism effect of the dietary plant estrogen intake.
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Affiliation(s)
- C F Ye
- Department of Orthopaedics, Tonglu County Chinese Medicine Hospital, Hangzhou, China
| | - Y M Pan
- Department of Orthopaedics, Tonglu County Chinese Medicine Hospital, Hangzhou, China
| | - H Zhou
- Department of Orthopaedics, Hangzhou Traditional Chinese Medicine Hospital, Hangzhou, China
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Pan Y, Schubert DW, Ryu JE, Wujick E, Liu C, Shen C, Liu X. Dynamic oscillatory rheological properties of polystyrene/poly(methyl methacrylate) blends and their composites in the presence of carbon black. ACTA ACUST UNITED AC 2018. [DOI: 10.30919/es.180402] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Huang Y, Wang J, Cao F, Jiang H, Li A, Li J, Qiu L, Shen H, Chang W, Zhou C, Pan Y, Lu Y. SHP2 associates with nuclear localization of STAT3: significance in progression and prognosis of colorectal cancer. Sci Rep 2017; 7:17597. [PMID: 29242509 PMCID: PMC5730547 DOI: 10.1038/s41598-017-17604-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 11/28/2017] [Indexed: 12/11/2022] Open
Abstract
Tyrosine phosphatase SHP2, encoded by PTPN11, has been implicated in many physiologic and pathologic processes in neoplastic progression. However, controversies are emerging from many studies, indicating SHP2 has a dual role in different types of tumors. We aimed to explore the role of SHP2 in progression and prognosis of colorectal cancer (CRC). SHP2 inhibited CRC cell proliferation and migration, and the phosphorylation of STAT3 was negatively regulated by SHP2 in CRC. SHP2 and nuclear STAT3 were examined in 270 CRC tissues. SHP2 was significantly correlated with nuclear STAT3 (Spearman’s rho = −0.408, P ≤ 0.001). Based on Cox regression analysis, patients with high levels of SHP2 and low levels of nuclear STAT3 had longer disease-specific survival (DSS) (HR, 0.362; 95% CI, 0.165–0.794) and disease-free survival (DFS) (HR, 0.447; 95% CI, 0.227–0.877). Further, low levels of SHP2 and high levels of nuclear STAT3 were independently associated with adverse outcomes in the whole cohort (DFS; HR, 2.353; 95% CI, 1.199–4.619). These results suggest that combination of SHP2 and nuclear STAT3 is a strong prognostic predictor in CRC.
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Affiliation(s)
- Yan Huang
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Jie Wang
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Fuao Cao
- Department of colorectal surgery, Changhai Hospital, Second Military Medical University, Shanghai, 200433, China
| | - Hailong Jiang
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - An Li
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Jianzhong Li
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Lei Qiu
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Hao Shen
- Department of Environmental Hygiene, Second Military Medical University, Shanghai, 200433, China
| | - Wenjun Chang
- Department of Environmental Hygiene, Second Military Medical University, Shanghai, 200433, China
| | - Chuanxiang Zhou
- Department of Oral Pathology, Peking University School and Hospital of Stomatology, Beijing, 100081, China.
| | - Yamin Pan
- Department of Digestive Endoscopy, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
| | - Yiming Lu
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, 200433, China.
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Gong H, Cao Y, Han G, Zhang Y, You Q, Wang Y, Pan Y. p53/microRNA-374b/AKT1 regulates colorectal cancer cell apoptosis in response to DNA damage. Int J Oncol 2017; 50:1785-1791. [DOI: 10.3892/ijo.2017.3922] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 03/07/2017] [Indexed: 11/06/2022] Open
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Pan Y, Liu X, Kaschta J, Hao X, Liu C, Schubert DW. Viscoelastic and electrical behavior of poly(methyl methacrylate)/carbon black composites prior to and after annealing. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.02.050] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [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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Liu X, Pan Y, Hao X, Dai K, Schubert DW. The role of conductive pathways in the conductivity and rheological behavior of poly(methyl methacrylate)-graphite composites. J Appl Polym Sci 2016. [DOI: 10.1002/app.43810] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xianhu Liu
- Institute of Polymer Materials, Friedrich-Alexander University Erlangen-Nuremberg, Martensstr 7; 91058 Erlangen Germany
| | - Yamin Pan
- Institute of Polymer Materials, Friedrich-Alexander University Erlangen-Nuremberg, Martensstr 7; 91058 Erlangen Germany
| | - Xiaoqiong Hao
- Institute of Polymer Materials, Friedrich-Alexander University Erlangen-Nuremberg, Martensstr 7; 91058 Erlangen Germany
| | - Kun Dai
- College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology; Zhengzhou University; Zhengzhou 450002 China
| | - Dirk W. Schubert
- Institute of Polymer Materials, Friedrich-Alexander University Erlangen-Nuremberg, Martensstr 7; 91058 Erlangen Germany
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Pan Y, Liu X, Hao X, Schubert DW. Conductivity and phase morphology of carbon black-filled immiscible polymer blends under creep: an experimental and theoretical study. Phys Chem Chem Phys 2016; 18:32125-32131. [PMID: 27847954 DOI: 10.1039/c6cp06175c] [Citation(s) in RCA: 18] [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: 11/21/2022]
Abstract
The simultaneous evolution of conductivity and phase morphology of blend composites was investigated under shear and in the quiescent state.
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Affiliation(s)
- Yamin Pan
- Institute of Polymer Materials
- Friedrich-Alexander University Erlangen-Nuremberg
- 91058 Erlangen
- Germany
| | - Xianhu Liu
- Institute of Polymer Materials
- Friedrich-Alexander University Erlangen-Nuremberg
- 91058 Erlangen
- Germany
| | - Xiaoqiong Hao
- School of Science
- Xi'an Jiaotong University
- Xi'an
- China
| | - Dirk W. Schubert
- Institute of Polymer Materials
- Friedrich-Alexander University Erlangen-Nuremberg
- 91058 Erlangen
- Germany
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Hao X, Kaschta J, Pan Y, Liu X, Schubert DW. Intermolecular cooperativity and entanglement network in a miscible PLA/PMMA blend in the presence of nanosilica. POLYMER 2016. [DOI: 10.1016/j.polymer.2015.11.029] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [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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Liu X, Pan Y, Zheng G, Liu C. Suppression of the hierarchical structure of water-assisted injection moulded iPP in the presence of a β-nucleating agent and lamellar branching of a β-crystal. RSC Adv 2016. [DOI: 10.1039/c6ra14921a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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
Unexpected lamellar branching of the β-crystal structure is observed in water-assisted injection molded iPP parts with a high content of β-nucleating agent.
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Affiliation(s)
- Xianhu Liu
- National Engineering Research Center for Advanced Polymer Processing Technology
- Zhengzhou University
- Zhengzhou
- China
- Institute of Polymer Materials
| | - Yamin Pan
- Institute of Polymer Materials
- Friedrich-Alexander University Erlangen Nuremberg
- 91058 Erlangen
- Germany
| | - Guoqiang Zheng
- National Engineering Research Center for Advanced Polymer Processing Technology
- Zhengzhou University
- Zhengzhou
- China
| | - Chuntai Liu
- National Engineering Research Center for Advanced Polymer Processing Technology
- Zhengzhou University
- Zhengzhou
- China
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Hao X, Kaschta J, Liu X, Pan Y, Schubert DW. Entanglement network formed in miscible PLA/PMMA blends and its role in rheological and thermo-mechanical properties of the blends. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.10.037] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Shi S, Pan Y, Lu B, Shen C, Zheng G, Liu C. Preparation and Characterization of a Bipolar Membrane Modified by Copper Phthalocyanine 16-Carboxylic Acid and Acetyl Ferrocene. J MACROMOL SCI B 2014. [DOI: 10.1080/00222348.2014.910047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Wu J, Pan YM, Wang TT, Gao DJ, Hu B. Endotherapy versus surgery for early neoplasia in Barrett's esophagus: a meta-analysis. Gastrointest Endosc 2014; 79:233-241.e2. [PMID: 24079410 DOI: 10.1016/j.gie.2013.08.005] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [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: 04/26/2013] [Accepted: 08/04/2013] [Indexed: 02/08/2023]
Abstract
BACKGROUND Esophagectomy is the conventional treatment for Barrett's esophagus with high-grade dysplasia and intramucosal cancer. Endotherapy is an alternative treatment. OBJECTIVE To compare the efficacy and safety of these 2 treatments. DESIGN PubMed, Web of Science, EMBASE, Cochrane Library and momentous meeting abstracts were searched. Studies comparing endotherapy with esophagectomy were included in the meta-analysis. Pooling was conducted in a random-effects model. SETTING Tertiary-care facility. PATIENTS Seven studies involving 870 patients were included. INTERVENTION Endotherapy and esophagectomy. MAIN OUTCOME MEASUREMENTS Neoplasia remission rate, neoplasia recurrence rate, overall survival rate, neoplasia-related death, and major adverse events. RESULTS Meta-analysis showed that there was no significant difference between endotherapy and esophagectomy in the neoplasia remission rate (relative risk [RR] 0.96; 95% CI, 0.91-1.01); overall survival rate at 1 year (RR 0.99; 95% CI, 0.94-1.03), 3 years (RR 1.03; 95% CI, 0.96-1.10), and 5 years (RR 1.00; 95% CI, 0.93-1.06); and neoplasia-related mortality (risk difference [RD] 0; 95% CI, -0.02 to 0.01). Endotherapy was associated with a higher neoplasia recurrence rate (RR 9.50; 95% CI, 3.26-27.75) and fewer major adverse events (RR 0.38; 95% CI, 0.20-0.73). LIMITATIONS Relatively small number of retrospective studies available, different types of endoscopic treatments were used. CONCLUSION Endotherapy and esophagectomy show similar efficacy except in the neoplasia recurrence rate, which is higher after endotherapy. Prospective, randomized, controlled trials are needed to confirm these results.
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Affiliation(s)
- Jun Wu
- Department of Endoscopy, Eastern Hepatobiliary Hospital, The Second Military Medical University, Shanghai, China
| | - Ya-min Pan
- Department of Endoscopy, Eastern Hepatobiliary Hospital, The Second Military Medical University, Shanghai, China
| | - Tian-tian Wang
- Department of Endoscopy, Eastern Hepatobiliary Hospital, The Second Military Medical University, Shanghai, China
| | - Dao-jian Gao
- Department of Endoscopy, Eastern Hepatobiliary Hospital, The Second Military Medical University, Shanghai, China
| | - Bing Hu
- Department of Endoscopy, Eastern Hepatobiliary Hospital, The Second Military Medical University, Shanghai, China
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Hu B, Wang TT, Wu J, Shi ZM, Gao DJ, Pan YM. Antireflux stents to reduce the risk of cholangitis in patients with malignant biliary strictures: a randomized trial. Endoscopy 2014; 46:120-6. [PMID: 24477367 DOI: 10.1055/s-0034-1364872] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND AND STUDY AIMS There are limited data on the role of antireflux biliary stents. This single-center randomized trial compared the endoscopic use of partly covered antireflux metal stents (pcARMS) with that of standard uncovered self-expandable metal stents (ucSEMS) for the palliation of nonhilar malignant biliary obstruction. PATIENTS AND METHODS Between August 2007 and February 2012, patients with nonhilar malignant biliary obstruction were randomly assigned to treatment with either pcARMS or ucSEMS. Subsequent follow-up was conducted in clinic or by phone. The primary outcome was onset of cholangitis within 12 months of stenting. Secondary outcomes included other morbidities, stent dysfunctions, and survival. RESULTS Altogether 112 patients were included, 56 in each group. The stents were successfully deployed in all patients. Satisfactory jaundice control was achieved in 49 cases in the pcARMS group, compared with 47 in the ucSEMS group (P = 0.135). Fewer patients experienced cholangitis in the pcARMS group than in the ucSEMS group (10 vs. 21 patients; P = 0.035), and the frequency of episodes was less (P = 0.022). Respectively, 17 and 29 stent dysfunctions before death were observed in the pcARMS and ucSEMS groups (P = 0.051) and the median stent patency was 13.0 (standard deviation [SD] 3.4) and 10.0 (1.2) months, respectively (P = 0.044). At final follow-up, in January 2013, 50 /52 and 52 /55 patients had died and no difference in median survival was seen between the two groups (8.0 vs. 9.0 months, P = 0.56). CONCLUSIONS Stenting with pcARMS compared with standard ucSEMS reduces risk of ascending cholangitis and has longer stent patency, but does not increase patient survival. Chictr.org. number, ChiCTR-TRC-11001800.
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Affiliation(s)
- Bing Hu
- Department of Endoscopy, Eastern Hepatobiliary Hospital, Second Military Medical University, Shanghai, China
| | - Tian-tian Wang
- Department of Endoscopy, Eastern Hepatobiliary Hospital, Second Military Medical University, Shanghai, China
| | - Jun Wu
- Department of Endoscopy, Eastern Hepatobiliary Hospital, Second Military Medical University, Shanghai, China
| | - Zhi-mei Shi
- Department of Endoscopy, Eastern Hepatobiliary Hospital, Second Military Medical University, Shanghai, China
| | - Dao-jian Gao
- Department of Endoscopy, Eastern Hepatobiliary Hospital, Second Military Medical University, Shanghai, China
| | - Ya-min Pan
- Department of Endoscopy, Eastern Hepatobiliary Hospital, Second Military Medical University, Shanghai, China
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Guo M, Pan YM, Dai YL, Gao ZM. First Report of Brown Blight Disease Caused by Colletotrichum gloeosporioides on Camellia sinensis in Anhui Province, China. Plant Dis 2014; 98:284. [PMID: 30708777 DOI: 10.1094/pdis-08-13-0896-pdn] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Yellow Mountain fuzz tip, a cultivar of Camellia sinensis (L.) Kuntze, is commonly grown in the Yellow Mountain region in Anhui Province of China. During 2011 to 2012, leaf and twig blight on tea plants occurred from July to September in growing regions. Symptoms of blight on leaves of infected plants were detected in 30 to 60% of the fields visited and up to 500 ha were affected each year. Symptoms began as small, water-soaked lesions on young leaves and twigs and later became larger, dark brown, necrotic lesions, 1 to 3 mm in diameter on leaves and 2 to 5 mm long on twigs. To determine the causal agent, symptomatic leaf tissue was collected from plants in Gantang and Tangkou townships in September 2012. Small pieces of diseased tea leaves and twigs were surface-disinfested in 2% NaClO for 3 min, rinsed twice in distilled water, plated on potato dextrose agar, and incubated at 28°C for 5 days. Eleven isolates were recovered and all cultures produced white-to-gray fluffy aerial hyphae and were dark on the reverse of the plate. The hyphae were hyaline, branching, and septate. Setae were 2- to 3-septate, dark brown, acicular, and 78.0 to 115.0 μm. Conidiogenous cells were hyaline, short, branchless, cylindrical, and 11.3 to 21.5 × 4.2 to 5.3 μm. Conidia were hyaline, aseptate, guttulate, cylindrical, and 12.5 to 17.3 × 3.9 to 5.8 μm. Appresoria were ovate to obovate, dark brown, and 8.4 to 15.2 × 7.8 to 12.9 μm. DNA was amplified using the rDNA-ITS primer pair ITS4/ITS5 (3), glyceraldehyde-3-phosphate dehydrogenase gene (GAPDH) primer pair GDF/GDR (2) and beta-tubulin 2 gene (Tub2) primer pair Btub2Fd/Btub4Rd (4). Sequences (GenBank Accession Nos. KC913203, KC913204, and KC913205) of the 11 isolates were identical and revealed 100% similarity to the ITS sequence of strain P042 of Colletotrichum gloeosporioides (EF423527), 100% identity to the GAPDH of isolate C07009 of C. gloeosporioides (GU935860), and 99% similarity to Tub2 of isolate 85 of C. gloeosporioides (AJ409292), respectively. Based on the above data, the 11 isolates were identified as C. gloeosporioides (Penz.) Penz. & Sacc. To confirm pathogenicity, Koch's postulate was performed and 4 ml of conidial suspension (1 × 105 conidia/ml) of each of the 11 isolates was sprayed on five leaves and five twigs per plant on four 12-month-old Yellow Mountain fuzz tip plants. Control plants were sprayed with distilled water. The inoculated plants were maintained at 28°C in a greenhouse with constant relative humidity of 90% and a 12-h photoperiod of fluorescent light. Brown necrotic lesions appeared on leaves and twigs after 7 days, while the control plants remained healthy. The experiments were conducted three times and the fungus was recovered and identified as C. gloeosporioides by both morphology and molecular characteristics. Tea plant blight caused by C. gloeosporioides was identified in Brazil (1), but to our knowledge, this is the first report of C. gloeosporioides causing tea leaf and twig blight on Yellow Mountain fuzz tip plants in Anhui Province of China. References: (1) M. A. S. Mendes et al. Page 555 in: Embrapa-SPI/Embrapa-Cenargen, Brasilia, 1998. (2) M. D. Templeton et al. Gene 122:225, 1992. (3) T. J. White et al. Page 315 in: PCR Protocols: A Guide to Methods and Applications. Academic Press, San Diego, 1990. (4) J. H. C. Woudenberg et al. Persoonia 22:56, 2009.
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Affiliation(s)
- M Guo
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, 130 West of Changjiang Road, Hefei, 230036, China
| | - Y M Pan
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, 130 West of Changjiang Road, Hefei, 230036, China
| | - Y L Dai
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, 130 West of Changjiang Road, Hefei, 230036, China
| | - Z M Gao
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, 130 West of Changjiang Road, Hefei, 230036, China
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Shi S, Pan Y, Lu B, Zheng G, Liu C, Dai K, Shen C. Realizing the simultaneously improved toughness and strength of ultra-thin LLDPE parts through annealing. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.10.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Guo M, Pan YM, Dai YL, Gao ZM. First Report of Leaf Spot Caused by Colletotrichum spaethianum on Peucedanum praeruptorum in China. Plant Dis 2013; 97:1380. [PMID: 30722170 DOI: 10.1094/pdis-03-13-0246-pdn] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Peucedanum praeruptorum Dunn, a traditional Chinese medicinal herb, is an important crop in Ningguo, China. Since 2010, leaf spot symptoms were observed yearly starting in June. Blighted leaf areas on individual plants ranged from 10 to 25% in many fields, and up to 200 ha were affected each year. Symptoms consisted of small, brown, necrotic spots uniformly distributed on the 1- to 2-week-old leaves. Small tissue pieces from the edges of lesions were disinfected in 2% NaClO for 3 min, rinsed twice in distilled water, plated on potato dextrose agar (PDA), and incubated at 25°C in darkness for 4 days. Single spore isolations were obtained for six strains. When inoculated on SNA media, the six strains produced typical septate mycelium, with the young hyphae hyaline and aged ones white greyish. Setae of the strains on SNA were brown, tip acute, 2- to 3-septate, and 32.5 to 85.6 μm long. Conidiogenous cells were hyaline, cylindrical, 2- to 3-septate, 6.2 to 16.5 μm in length, and 2.8 to 4.3 μm in width. The mature conidia were slightly curved, with round apex and truncate base, 1 to 5 oil globules, and were 13.3 to 23.8 μm in length and 3.0 to 3.9 μm in width, respectively. Appressoria were solitary or in loose groups, dark brown, irregular shapes, and were 6.8 to 9.2 μm in length and 4.3 to 7.1 μm in width. PCR amplification was carried out by utilizing the universal rDNA-ITS primer pair ITS4/ITS5 (1) and the actin gene primer pair ACT-512F and ACT-783R (2). The PCR products of ITS (GenBank Accession No. KC913201) and actin gene (KC913202) from six isolates were identical, respectively, and shared 100% identity to the ITS sequence of strain CBS 167.49 of Colletotrichum spaethianum (GU227807.1) and 99% similarity to the actin gene of strain CBS 167.49 of C. spaethianum (GU227905.1), which was isolated from Hosta sieboldiana in Germany (3). Based on the above, the isolates were identified as C. spaethianum. To confirm pathogenicity, conidial suspensions (105 conidia ml-1) of each of the six isolates were sprayed on four leaves per plant on five 6-month-old P. praeruptorum plants. Control plants were sprayed with water. Plants were maintained at 28°C in a greenhouse with constant humidity (RH 90%) and a 12-h photoperiod of fluorescent light. Symptoms similar to the original ones started to appear after 10 days, while the control plants remained healthy. The tests were repeated three times and the fungus was recovered and identified as C. spaethianum by both morphology and molecular characterization. To our knowledge, this is the first report of C. spaethianum causing leaf spot on P. praeruptorum in China. Since the C. spaethianum infections pose a serious threat to P. praeruptorum production, this disease needs to be considered for developing effective control strategies. References: (1) I. Carbone and L. M. Kohn. Mycologia 91:553, 1999. (2) U. Damm et al. Fung. Divers. 39:45, 2009. (3) T. J. White et al. Page 315 in: PCR Protocols: A Guide to Methods and Applications. Academic Press, San Diego, 1990.
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Affiliation(s)
- M Guo
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, 130 West of Changjiang Road, Hefei, 230036, P. R. China
| | - Y M Pan
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, 130 West of Changjiang Road, Hefei, 230036, P. R. China
| | - Y L Dai
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, 130 West of Changjiang Road, Hefei, 230036, P. R. China
| | - Z M Gao
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, 130 West of Changjiang Road, Hefei, 230036, P. R. China
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Gao DJ, Hu B, Pan YM, Wang TT, Wu J, Lu R, Wang SP, Shi ZM, Huang H, Wang SZ. Feasibility of using wire-guided needle-knife electrocautery for refractory biliary and pancreatic strictures. Gastrointest Endosc 2013; 77:752-8. [PMID: 23357494 DOI: 10.1016/j.gie.2012.11.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Accepted: 11/19/2012] [Indexed: 02/08/2023]
Abstract
BACKGROUND Endoscopic management of biliary or pancreatic strictures by stent insertion is well established. However, some high-grade strictures are refractory to dilation and stent placement with conventional methods. OBJECTIVE To evaluate the safety and efficacy of the wire-guided electrotomy technique in dilating stiff biliary and/or pancreatic stenoses when ordinary methods failed. DESIGN Retrospective analysis of a prospective database. SETTING Tertiary referral university hospital. PATIENTS This study involved 279 patients with biliary or pancreatic strictures who underwent ERCP for stenting. INTERVENTION After conventional dilation failed, wire-guided needle-knife electrocautery was attempted to facilitate insertion of the dilating devices and eventually endoprosthesis. MAIN OUTCOME MEASUREMENTS The successful treatment and drainage of biliary or pancreatic strictures. RESULTS With wire-guided needle-knife cauterization, the success rate of stricture dilatation increased from 95.7% (267 of 279 patients) to 98.9% (276 of 279 patients). Dilation of stenoses was successful in 9 of 10 patients (90%) by using electrocautery with the wire-guided needle-knife technique. Postprocedure adverse events included self-limited bleeding, mild acute pancreatitis, hyperamylasemia, cholangitis, and biliary perforation. No procedure-related death occurred. LIMITATIONS Retrospective, single-center study and small sample size. CONCLUSIONS Wire-guided needle-knife electroincision appears to be effective for traversing refractory biliary or pancreatic strictures and can be considered as an alternative approach to conventional methods. However, the safety of such a technique needs to be further evaluated.
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Affiliation(s)
- Dao-jian Gao
- Department of Endoscopy, Eastern Hepatobiliary Hospital, Second Military Medical University, Shanghai 200438, China
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Li P, Cao S, Dai YL, Li XL, Xu DF, Guo M, Pan YM, Gao ZM. Genetic diversity of Phytophthora capsici (Pythiaceae) isolates in Anhui Province of China based on ISSR-PCR markers. Genet Mol Res 2012; 11:4285-96. [PMID: 23315808 DOI: 10.4238/2012.december.17.4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Phytophthora capsici is a plant pathogenic oomycete that damages numerous crops worldwide. Consequently, interest in research on the genetic structure of this species has grown in recent decades. However, there is little information about P. capsici in eastern China. We investigated the genetic diversity of P. capsici isolates from three large regions of Anhui Province in eastern China based on ISSR-PCR technology. Thirteen random primers were screened and used to amplify DNA from 51 samples. We obtained 158 reproducible ISSR fragments, of which 90% were polymorphic, revealing a high degree of polymorphism among the isolates. Genetic similarity coefficients among all the isolates ranged from 0.56 to 0.94, with a mean of 0.84 based on the ISSR data, indicating a high level of genetic variation in these P. capsici isolates. Cluster analysis using UPGMA indicated that the Anhui isolates were divided into seven groups according to the DNA fingerprints, although there was no correlation between the ISSR group and geographic origin. Isolates from the same location showed no clustering based on the year of sampling. AMOVA partitioned variability among (13.6%) and within populations (86.4%). The gene flow among populations ranged from 2.804 to 4.937, with a mean of 3.545, indicating highly frequent gene exchange. Genetic distances and genetic differentiation were negatively correlated with geographic distances. These results lead us to suggest that this pathogen has considerable evolutionary potential, which will enable it to adapt to and overcome management strategies over time.
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Affiliation(s)
- P Li
- School of Plant Protection, Anhui Agricultural University, Hefei, China
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Abstract
Tree peony bark, a main component of Chinese traditional medicine used for alleviating fever and dissipating blood stasis, is mainly produced in Tongling, China. Recently, tree peony cultivation in this area was seriously affected by root rot, with approximately 20 to 30% disease incidence each year. The disease severely affects yield and quality of tree peony bark. During the past 2 years, we collected 56 diseased tree peony plants from Mudan and Fenghuang townships in Tongling. We found reddish brown to dark brown root rot in mature roots, especially on those with injuries. Plant samples collected were disinfected with 2% sodium hypochlorite and isolations were conducted on potato sucrose agar (PSA). Eleven isolates were obtained and all had white fluffy aerial hypha on PSA. Two types of conidia were produced; the larger, reaphook-shaped ones had three to five septa and the smaller, ellipse-shaped ones had one or no septum. The reaphook-shaped conidia were 20.15 to 37.21 × 3.98 to 5.27 μm and the ellipse-shaped conidia were 6.02 to 15.52 × 2.21 to 5.33 μm in size. Chlamydospores were produced, with two to five arranged together. Biological characteristics of the fungi indicated that the optimum temperature for the mycelial growth on PSA was 25 to 30°C and the optimum pH range was 5.5 to 7.0. The above morphological characteristics point the fungal isolates to be Fusarium solani. To confirm pathogenicity, 30 healthy 1-year-old tree peony seedling plants were grown in pots (25 cm in diameter) with sterilized soil and a conidial suspension from one isolate (FH-1, 5 × 105 conidia/ml) was used for soil inoculation. Inoculated seedlings were maintained at 28°C in a greenhouse with a 12-h photoperiod of fluorescent light. Seedlings inoculated with distilled water were used as controls. After 3 weeks, the roots were collected and rinsed with tap water. Dark brown lesions were observed in the inoculated mature roots but not in the control roots. To confirm the identity of the pathogen, F. solani strains were reisolated from the lesions and total genomic DNA was extracted with the cetyltriethylammnonium bromide method from the mycelia of the reisolated strains (1). PCR was performed using the fungal universal primers ITS4 (5'-TCCTCCGCTTATTGATATGC-3') and ITS5 (5'-GGAAGTAAAAGTCGTAACAAGG-3') to amplify a DNA fragment of approximately 590 bp. The purified PCR products were sequenced (Invitrogen Co., Shanghai, China) and shared 100% sequence identity with each other. A comparison of the sequence (JQ658429.1) by the Clustal_W program (2) with those uploaded in GenBank confirmed with the fungus F. solani (100% sequence similarity to isolate S-0900 from the Great Plains of the United States; EU029589.1). To our knowledge, this is the first report of F. solani causing medical tree peony root rot in China. The existence of this pathogen in China may need to be considered for developing effective control strategies. References: (1). C. N. Stewart et al. Biotechniques 14:748, 1993. (2). J. D. Thompson et al. Nucleic Acids Res. 22:4673, 1994.
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Affiliation(s)
- M Guo
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, 130 West of Changjiang Road, Hefei, 230036, P. R. China
| | - Y M Pan
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, 130 West of Changjiang Road, Hefei, 230036, P. R. China
| | - Z M Gao
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, 130 West of Changjiang Road, Hefei, 230036, P. R. China
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Gu Y, Huang NY, Liang J, Pan YM, Liu FG. [Clinical study of 1949 cases of port wine stains treated with vascular photodynamic therapy (Gu's PDT)]. Ann Dermatol Venereol 2007; 134:241-4. [PMID: 17389848 DOI: 10.1016/s0151-9638(07)91816-5] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [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: 11/16/2022]
Abstract
BACKGROUND Complete fading of port wine stains (PWS) is difficult to achieve with current laser treatments. Photodynamic therapy (Gu's PDT) could offer a very efficient alternative for PWS therapy. PATIENTS AND METHOD 1949 lesions in 1385 patients were treated by PDT. Each patient received an intravenous injection of hematoporphyrin derivative (HpD) or hematoporphyrin monomethyl ether (HMME) at 3-7 mg/kg. Laser irradiation was performed on a 2 to 8 cm spot size. Different wavelengths (488.0 nm to 578.2 nm) were evaluated with a power density of 50-100 mW/cm2. Fluences ranged from 90 to 540 J/cm2. RESULTS Among the 1942 lesions, PWS clearance was observed in 99.7% of cases. Excellent results were achieved in 128 lesions (6.6%) (100% clearance), 746 lesions (38.3%) yielded to good results (clearance > 75%), 923 lesions (47.4%) showed moderate results (clearance 50-75%), 145 lesions (7.4%) showed poor results (clearance<50%) and in 7 lesions (0.3%) no visible change was observed. The pink port wine stains revealed better response to Gu's PDT with only one session. Conversely, purple stains in adult patients required 2 sessions or more. CONCLUSION This new PDT technique is effective and highly selective, with almost no risk of scarring.
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Affiliation(s)
- Y Gu
- Department of Laser Medicine, Chinese PLA General Hospital, Beijing 100853, China.
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Pan YM, Gill GN, Tilson CS, Wall WH, McCurdy HH. Improved procedure for the analysis of gamma-hydroxybutyrate and ethylene glycol in whole blood. J Anal Toxicol 2001; 25:328-32. [PMID: 11499886 DOI: 10.1093/jat/25.5.328] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The modification of a procedure originally developed for the analysis of ethylene glycol (EG) in serum was also found to permit the simultaneous analysis of gamma-hydroxybutyrate (GHB) in whole blood. The primary feature of the EG procedure was that it employed a water scavenger, 2,2-dimethoxypropane, which reacted with water to produce volatile methanol. Water scavenging is a technique that could be adapted for the analysis of drugs such as GHB as their respective di-t-butyldimethylsilyl derivatives. A close structural analogue of GHB, 2-hydroxy-3-methylbutyric acid, was successfully employed as the internal standard for both EG and GHB. The advantages of the modified procedure are that it is very quick and easy to perform and produces remarkably clean extracts for GHB, especially when compared to other liquid-liquid techniques. We have successfully applied this technique for the analysis of GHB and EG in several postmortem and driving-under-the-influence cases. There is an apparently wide variability between levels of GHB that can be associated with impairment versus those levels that can be associated with death.
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Affiliation(s)
- Y M Pan
- Georgia Bureau of Investigation, Division of Forensic Sciences, Decatur 30037-0808, USA
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Cagle JC, McCurdy HH, Pan YM, Ayton KJ, Wall WH, Solomons ET. Evaluation of the CEDIA DAU assays and the AxSym system for the analysis of cannabinoids in whole blood. J Anal Toxicol 1997; 21:213-7. [PMID: 9171205 DOI: 10.1093/jat/21.3.213] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The Microgenics CEDIA DAU (EIA) and the Abbott AxSym system (FPIA) cannabinoids assays were evaluated for their combined effectiveness in the analysis of cannabinoids in whole blood. Blood samples were treated with acetone, evaporated, and reconstituted, and the supernatant was analyzed by the EIA cannabinoids assay. Blood samples determined positive by EIA were then treated with acetonitrile and sodium sulfate, and the resultant protein-free supernatant was analyzed using the FPIA cannabinoids assay. A total of 98 blood samples determined to be presumptively positive by both EIA and FPIA were further analyzed for the presence of 11-nor-carboxy-delta9-tetrahydrocannabinol-9-carboxylic acid (THCCOOH). All 98 blood samples could be confirmed for the presence of THCCOOH by gas chromatography-mass spectrometry (GC-MS) at concentrations greater than the 10 ng/mL cutoff. The GC-MS results were found to correlate significantly better with those of the FPIA cannabinoids assay (r = 0.75) than with EIA (r = 0.22). Procedures for the rapid analysis of whole blood for cannabinoids using CEDIA DAU reagents and the AxSym system are presented.
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Affiliation(s)
- J C Cagle
- GBI Division of Forensic Sciences, Decatur, Georgia 30037-0808, USA
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Wu CB, Shimizu Y, Ng A, Pan YM. Characterization and partial purification of microsomal casein kinase II from osteoblast-like cells: an enzyme that phosphorylates osteopontin and phosphophoryn. Connect Tissue Res 1996; 34:23-32. [PMID: 8835845 DOI: 10.3109/03008209609028890] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Microsomal casein kinase II (mCKII) is a membrane-bound enzyme present in the microsomal fractions of ROS 17/2.8 osteoblast-like cells. It phosphorylates acidic matrix phosphoproteins such as phosphophoryn and osteopontin. Addition of 1.0% Nonidet P-40 facilitates extraction of the optimum amount of detergent-solubilized and -activated enzyme from microsomal fractions. mCKII was partially purified over 3000-fold by sequential chromatography over DEAE-cellulose and heparin-agarose. SDS-polyacrylamide gels, showed that mCKII contained 43 kDa and 31 kDa polypeptides, corresponding to the alpha- and beta-subunits of the enzyme, respectively. The alpha subunit was identified by anti-CKII antiserum and the beta subunit, by its ability to undergo autophosphorylation. The enzyme was inhibited by 50% with 0.4 micrograms/ml heparin and stimulated by 100% with 1.0 mM spermine when casein was used as a substrate. The phosphorylation of phosphophoryn was reduced to 50% by 0.8 micrograms/ml heparin, but was increased to 2-2.5 fold by 5 to 15 mM spermine, which may be due to substrate-directed effects. Kinetic analysis showed that the apparent Km values for phosphophoryn (0.39 microM) and for osteopontin (2.1 microM) were lower than that for casein (21.3 microM). Vmax values of phosphophoryn and osteopontin were 2.2-fold and 4.6-fold higher than that of casein. Using the ratio Vmax/Km as a measure of kinetic specificity, osteopontin and phosphophoryn appear to be the more specific substrates than casein for mCKII. Thus, both proteins can be considered as physiological substrates for mCKII.
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Affiliation(s)
- C B Wu
- Department of Clinical Dental Sciences, Faculty of Dentistry University of British Columbia, Vancouver, Canada
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Wu CB, Pan YM, Simizu Y. Microsomal casein kinase II in endoplasmic reticulum- and Golgi apparatus-rich fractions of ROS 17/2.8 osteoblast-like cells: an enzyme that modifies osteopontin. Calcif Tissue Int 1995; 57:285-92. [PMID: 8673866 DOI: 10.1007/bf00298884] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Osteopontin is an acidic phosphoprotein containing casein kinase II (CKII) phosphorylatable sites and an acidic amino acid cluster. The metabolically 32P-labelings of both serines and threonines in vitro in osteopontin immunoprecipitated from rat osteoblast-like ROS 17/2.8 cells may suggest that casein kinase II catalyzes this modification. The enzyme occurs in microsomal fractions of rat osteoblast-like ROS 17/2.8 cells. Subcellular fractions containing endoplasmic reticulum and Golgi apparatus were isolated by differential centrifugation and were identified according to their ultrastructures and the presence of marker enzymes such as glucose-6-phosphatase and thiamine pyrophosphatase, respectively. both fractions phosphorylated the partially dephosphorylated osteopontin and the specific substrate peptide RRREEETEEE. Endoplasmic reticulum-catalyzed peptide phosphorylation was 2.7 times lower than that of Golgi although both endoplasmic reticulum- and Golgi-catalyzed peptide reactions were 50% inhibited by 20 and 100 ng/ml heparin, respectively. Western blot analysis revealed that both fractions contained osteopontin and microsomal CKII. Furthermore, microsomal CKII was immunogold-labeled in endoplasmic reticulum and Golgi apparatus. Heparin inhibition and utilization of [gamma-32P]GTP as a phosphate donor by both fractions confirmed their capacity to phosphorylate osteopontin. The results suggest that microsomal CKII modifies the acidic matrix proteins during transportation. These matrix phosphoproteins may participate in the mineralization process of hard tissues.
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Affiliation(s)
- C B Wu
- Department of Clinical Dental Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, Canada
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Uitto VJ, Pan YM, Leung WK, Larjava H, Ellen RP, Finlay BB, McBride BC. Cytopathic effects of Treponema denticola chymotrypsin-like proteinase on migrating and stratified epithelial cells. Infect Immun 1995; 63:3401-10. [PMID: 7642269 PMCID: PMC173468 DOI: 10.1128/iai.63.9.3401-3410.1995] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.8] [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: 01/26/2023] Open
Abstract
The effects of Treponema denticola and its outer membrane-bound chymotrypsin-like proteinase on periodontal ligament epithelial cell cultures at different stages of maturity were studied. In sparse cultures with migrating epithelial cells, large intracellular vacuoles were formed rapidly following exposure to live T. denticola. Treponemes showing structural damage were seen occasionally inside membrane-bound vesicles. Intensive membrane blebbing occurred in infected cells and continued for up to 48 h before the cell died. Blebbing could also be induced by a purified chymotrypsin-like proteinase of T. denticola. Cortical actin and alpha-actinin of the bacterium-treated cells showed disorganization, and pericellular fibronectin was degraded by both whole T. denticola and the isolated proteinase. Epithelial cells with well-formed lateral cell contacts appeared to be more resistant to the effects of T. denticola than migrating isolated cells. In multilayer epithelial cultures, adhesion of T. denticola and membrane blebbing were observed infrequently. There was no evidence of invasion of T. denticola into epithelial multilayers. However, immunogold electron microscopy showed rapid transport of T. denticola chymotrypsin-like proteinase into newly formed large intracellular vacuoles within the epithelial layers. These vacuoles were lined by membranes studded with ribosomes. T. denticola-treated epithelial multilayers had loose cell contacts, collapsed intercellular spaces, and increased permeability. Through its capacity to cause these unique cytopathic effects, the chymotrypsin-like proteinase of T. denticola has the potential to contribute to the initiation of periodontal disease.
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Affiliation(s)
- V J Uitto
- Department of Oral Biology, University of British Columbia, Vancouver, Canada
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Abstract
The unique features of junctional epithelium involve lack of keratinization, limited differentiation and a relatively permeable structure. In order to study the relationship between differentiation and permeability of stratified epithelium a model system was developed. Porcine periodontal ligament epithelial cells were cultured on the polycarbonate nucleopore membrane of the Transwell two-compartment culture system. Within 5 days of culture the cells formed a confluent multilayered structure. Subsequently, maturation of the structure and differentiation of surface cells took place. Transmission electron microscopy showed that the cells were arranged into basal and suprabasal layers with sparse desmosomal attachments and wide intercellular spaces resembling the organization of junctional epithelium. The basal cells attached to a subepithelial basal lamina through numerous hemidesmosomes. The cytokeratin profile of the cultured epithelium (K5, 6, 14, 16, 19) resembled that of the cells of junctional epithelium attached to the tooth surface. The older cultures expressed differentiation markers, K4, K13 and involucrin, thereby resembling sulcular epithelium. The epithelial permeability, measured by diffusion of phenol red, radioactive dextran or methionine tracers, and as transepithelial electrical resistance, decreased with the increased cell number and maturation of the cultures. The new model provides an organotypic culture system which allows to control differentiation of a multilayered periodontal epithelium. It thus may serve as a valuable new tool for studies on the permeability and behaviour of periodontal epithelium under the influence of exogenous and endogenous factors.
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Affiliation(s)
- Y M Pan
- Department of Oral Biology, University of British Columbia, Vancouver, Canada
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Abstract
A technique of sutureless trachea anastomosis in rabbits using carbon dioxide laser was reported herein. In 6 rabbits with laser-assisted trachea anastomoses, only one was found to have slight anastomotic stenosis after operation, whereas 6 rabbits with conventional sutures all were found to have anastomotic stenosis. Results show that laser-assisted trachea anastomosis has certain advantages over the conventional suturing technique, thereby finding wide application in clinical tracheal reconstruction and lung transplantation.
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Affiliation(s)
- Y M Pan
- Department of Surgery, Tongji Hospital, Tongji Medical University, Wuhan
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Salonen J, Uitto VJ, Pan YM, Oda D. Proliferating oral epithelial cells in culture are capable of both extracellular and intracellular degradation of interstitial collagen. Matrix 1991; 11:43-55. [PMID: 1709253 DOI: 10.1016/s0934-8832(11)80226-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The potential of epithelial cells to degrade interstitial collagen was studied by culturing human masticatory mucosa on decalcified dentin matrix. Morphological changes were observed in the underlying collagen substratum and in the connective tissue of the explant. Degradation of the substratum was initiated two days after the first contact with epithelial cells exhibiting basal cell markers. Electron microscopic studies confirmed extensive collagen degradation in the vicinity of these cells. No collagen degradation was observed underneath the connective tissue portion of the explant. Experiments in which the explant was partially separated from the underlying substratum by a filter further showed that connective tissue was apparently not involved in the collagen degradation by the epithelial cells. Lysis of connective tissue of the explant was observed in association with epithelial cells that showed a disrupted basal lamina and release of vesicular material from the exposed cell membrane. Collagen fibers were visible inside some epithelial cells suggesting intracellular collagenolysis. Primary cultures of human gingival epithelial cells and porcine periodontal ligament epithelial cells (epithelial cell rests of Malassez) that expressed similar basal cell cytokeratins as the active cells of the mucosal explants secreted collagenase, gelatinase and TIMP to the culture medium. They also contained acid collagenolytic proteinases. When cultured on a porous polycarbonate membrane the epithelial cells secreted collagenolytic enzymes from the pores at cell membrane sites lacking basal lamina. These results provide evidence that proliferating basal epithelial cells have a strong capacity for collagen degradation. It seems that the absence of basement membrane is the signal for these cells to secrete matrix degrading enzymes.
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Affiliation(s)
- J Salonen
- MRC Group in Periodontal Physiology, University of Toronto, Ontario, Canada
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