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Ma XC, Feng JX, Jing ZP. [Advances in non-invasive treatment of aortic diseases]. Zhonghua Wai Ke Za Zhi 2024; 62:532-536. [PMID: 38682623 DOI: 10.3760/cma.j.cn112139-20231204-00253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
The current clinical treatment methods for aortic diseases including aortic aneurysm, aortic dissection,etc.,are open surgery and endovascular surgery. Compared to traditional open surgery, endovascular surgery has the advantages of minimal trauma, fast recovery, fewer complications, and better prognosis, which gradually becomes the main trend in the treatment of aortic diseases. However, with the further development and long-term follow-up of endovascular treatment for aortic diseases, increasing evidence shows that in many cases, there are difficulties in the diagnosis of causes, decision-making of treatment timing, and lack of effective evaluation of treatment prognosis in endovascular treatments. Therefore, it is necessary to conduct in-depth research on non-invasive treatment including prevention, diagnosis, treatment, and prediction of aortic diseases. The non-invasive treatment of aortic disease is mainly applied to high-risk populations with aortic dissection, regulating key targets and mechanisms, and adopting drug intervention in advance to achieve the goal of controlling aortic dilation and preventing the occurrence of dissection. Conducting precise multi omics analysis to determine the optimal intervention timing and treatment strategy and targeting complications related to aortic disease or endovascular treatment for patients with a positive family history of aortic dilation or those who have developed aortic dissection. Precise regulation can be achieved to control the progression of aortic aneurysm and aortic dissection, delay or achieve long-term stable coexistence with aortic disease, and even reverse disease progression and achieve benign aortic remodelingthrough new intervention vectors. Ultimately achieving the ideal state of complete thrombosis and mechanized healing of the aortic aneurysm or aortic dissection false lumen.
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Affiliation(s)
- X C Ma
- Department of Vascular Surgery, the First Affiliated Hospital, Naval Medical University, Shanghai 200433, China
| | - J X Feng
- Department of Vascular Surgery, Ruijin Hospital, Shanghai 200025, China
| | - Z P Jing
- Department of Vascular Surgery, Shanghai Fourth People's Hospital, Shanghai 200434, China
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Guo ZY, Feng JX, Zhang LJ, Zhou YB, Zhou J, Yang K, Liu Y, Lin DD, Liu J, Dong Y, Wang TP, Wen LY, Ji MJ, Wu ZD, Jiang QW, Liang S, Guo J, Cao CL, Xu J, Lü S, Li SZ, Zhou XN. [Analysis of the new WHO guideline to accelerate the progress towards elimination of schistosomiasis in China]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2022; 34:217-222. [PMID: 35896483 DOI: 10.16250/j.32.1374.2022113] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
On February 2022, WHO released the evidence-based guideline on control and elimination of human schistosomiasis, with aims to guide the elimination of schistosomiasis as a public health problem in disease-endemic countries by 2030 and promote the interruption of schistosomiasis transmission across the world. Based on the One Health concept, six evidence-based recommendations were proposed in this guideline. This article aims to analyze the feasibility of key aspects of this guideline in Chinese national schistosomiasis control program and illustrate the significance to guide the future actions for Chinese national schistosomiasis control program. Currently, the One Health concept has been embodied in the Chinese national schistosomiasis control program. Based on this new WHO guideline, the following recommendations are proposed for the national schistosomiasis control program of China: (1) improving the systematic framework building, facilitating the agreement of the cross-sectoral consensus, and building a high-level leadership group; (2) optimizing the current human and livestock treatments in the national schistosomiasis control program of China; (3) developing highly sensitive and specific diagnostics and the framework for verifying elimination of schistosomiasis; (4) accelerating the progress towards elimination of schistosomiasis and other parasitic diseases through integrating the national control programs for other parasitic diseases.
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Affiliation(s)
- Z Y Guo
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - J X Feng
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - L J Zhang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Y B Zhou
- School of Public Health, Fudan University, Key Laboratory of Public Health Safety, Ministry of Education, Tropical Disease Research Center, China
| | - J Zhou
- Hunan Institute of Schistosomiasis Control, China
| | - K Yang
- Jiangsu Institute of Parasitic Diseases, China
| | - Y Liu
- Sichuan Provincial Center for Disease Control and Prevention, China
| | - D D Lin
- Jiangxi Institute of Parasitic Diseases, China
| | - J Liu
- Hubei Provincial Center for Disease Control and Prevention, China
| | - Y Dong
- Yunnan Institute of Endemic Disease Control and Prevention, China
| | - T P Wang
- Anhui Institute of Schistosomiasis Control, China
| | - L Y Wen
- Hangzhou Medical College, Zhejiang Provincial Center for Schistosomiasis Control, China
| | - M J Ji
- Nanjing Medical University, China
| | - Z D Wu
- Zhongshan School of Medicine, Sun Yat-sen University, China
| | - Q W Jiang
- School of Public Health, Fudan University, Key Laboratory of Public Health Safety, Ministry of Education, Tropical Disease Research Center, China
| | - S Liang
- University of Florida, Gainesville, United States of America
| | - J Guo
- Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | - C L Cao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - J Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - S Lü
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Shanghai Jiao Tong University School of Medicine and Chinese Center for Tropical Diseases Research, Shanghai 200025, China
| | - S Z Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Shanghai Jiao Tong University School of Medicine and Chinese Center for Tropical Diseases Research, Shanghai 200025, China
| | - X N Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Shanghai Jiao Tong University School of Medicine and Chinese Center for Tropical Diseases Research, Shanghai 200025, China
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Gong YF, Luo ZW, Feng JX, Xue JB, Guo ZY, Jin YJ, Yu Q, Xia S, Lü S, Xu J, Li SZ. [Prediction of trends for fine-scale spread of Oncomelania hupensis in Shanghai Municipality based on supervised machine learning models]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2022; 34:241-251. [PMID: 35896487 DOI: 10.16250/j.32.1374.2021247] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To predict the trends for fine-scale spread of Oncomelania hupensis based on supervised machine learning models in Shanghai Municipality, so as to provide insights into precision O. hupensis snail control. METHODS Based on 2016 O. hupensis snail survey data in Shanghai Municipality and climatic, geographical, vegetation and socioeconomic data relating to O. hupensis snail distribution, seven supervised machine learning models were created to predict the risk of snail spread in Shanghai, including decision tree, random forest, generalized boosted model, support vector machine, naive Bayes, k-nearest neighbor and C5.0. The performance of seven models for predicting snail spread was evaluated with the area under the receiver operating characteristic curve (AUC), F1-score and accuracy, and optimal models were selected to identify the environmental variables affecting snail spread and predict the areas at risk of snail spread in Shanghai Municipality. RESULTS Seven supervised machine learning models were successfully created to predict the risk of snail spread in Shanghai Municipality, and random forest (AUC = 0.901, F1-score = 0.840, ACC = 0.797) and generalized boosted model (AUC= 0.889, F1-score = 0.869, ACC = 0.835) showed higher predictive performance than other models. Random forest analysis showed that the three most important climatic variables contributing to snail spread in Shanghai included aridity (11.87%), ≥ 0 °C annual accumulated temperature (10.19%), moisture index (10.18%) and average annual precipitation (9.86%), the two most important vegetation variables included the vegetation index of the first quarter (8.30%) and vegetation index of the second quarter (7.69%). Snails were more likely to spread at aridity of < 0.87, ≥ 0 °C annual accumulated temperature of 5 550 to 5 675 °C, moisture index of > 39% and average annual precipitation of > 1 180 mm, and with the vegetation index of the first quarter of > 0.4 and the vegetation index of the first quarter of > 0.6. According to the water resource developments and township administrative maps, the areas at risk of snail spread were mainly predicted in 10 townships/subdistricts, covering the Xipian, Dongpian and Tainan sections of southern Shanghai. CONCLUSIONS Supervised machine learning models are effective to predict the risk of fine-scale O. hupensis snail spread and identify the environmental determinants relating to snail spread. The areas at risk of O. hupensis snail spread are mainly located in southwestern Songjiang District, northwestern Jinshan District and southeastern Qingpu District of Shanghai Municipality.
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Affiliation(s)
- Y F Gong
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Z W Luo
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - J X Feng
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - J B Xue
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Z Y Guo
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Y J Jin
- Shanghai Municipal Center for Disease Control and Prevention, China
| | - Q Yu
- Shanghai Municipal Center for Disease Control and Prevention, China
| | - S Xia
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - S Lü
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - J Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - S Z Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
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Feng JX, Zhou ZQ, Li SY. [Application and research progress of confocal laser endomicroscopy in pulmonary diseases]. Zhonghua Jie He He Hu Xi Za Zhi 2021; 44:260-266. [PMID: 33721941 DOI: 10.3760/cma.j.cn112147-20200522-00622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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5
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Feng JX, Wu JQ, Tong YX, Li GR. Correction to "Efficient Hydrogen Evolution on Cu Nanodots-Decorated Ni 3S 2 Nanotubes by Optimizing Atomic Hydrogen Adsorption and Desorption". J Am Chem Soc 2020; 142:18997. [PMID: 33095558 DOI: 10.1021/jacs.0c09673] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Feng JX, Ding LX, Ye SH, He XJ, Xu H, Tong YX, Li GR. Co(OH) 2 @PANI Hybrid Nanosheets with 3D Networks as High-Performance Electrocatalysts for Hydrogen Evolution Reaction. Adv Mater 2019; 31:e1904101. [PMID: 31846542 DOI: 10.1002/adma.201904101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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Feng JX, Ye SH, Xu H, Tong YX, Li GR. Design and Synthesis of FeOOH/CeO 2 Heterolayered Nanotube Electrocatalysts for the Oxygen Evolution Reaction. Adv Mater 2019; 31:e1904188. [PMID: 31846543 DOI: 10.1002/adma.201904188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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8
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Feng JX, Ye SH, Lu XF, Tong YX, Li GR. Correction to "Asymmetric Paper Supercapacitor Based on Amorphous Porous Mn 3O 4 Negative Electrode and Ni(OH) 2 Positive Electrode: A Novel and High-Performance Flexible Electrochemical Energy Storage Device". ACS Appl Mater Interfaces 2019; 11:39394. [PMID: 31592627 DOI: 10.1021/acsami.9b11304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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Feng JX, Xu H, Dong YT, Ye SH, Tong YX, Li GR. Corrigendum: FeOOH/Co/FeOOH Hybrid Nanotube Arrays as High-Performance Electrocatalysts for the Oxygen Evolution Reaction. Angew Chem Int Ed Engl 2019; 58:14795. [PMID: 31589384 DOI: 10.1002/anie.201908187] [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: 11/09/2022]
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Jing ZP, Feng JX, Bao XH, Li T, Zhao Y, Li Y, Li ZJ, Liu J, Wu MW, Zhao ZQ, Lu QS, Bao JM, Feng R, Zhou J. P6496Endovascular reconstruction from aortic valve to aortic arch by one-piece valved-fenestrated-bifurcated endografting in animal experiments. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.1086] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Aims
The possibility of endovascular reconstruction of aortic valve, sinus of Valsalva, and ascending aorta by a minimal-invasive single endograft has not been proven in vivo. Combining our own long-term experiences from transcatheter aortic valve replacement (TAVR) and Thoracic Endovascular Repair (TEVAR) for ascending and arch dissection, we designed the special endo-graft: a novel one-piece valved-fenestrated-bifurcated endografting, and tried to endovascularly reconstruct the area from Left ventricular outflow tract to aortic arch in animal experiments.
Methods and results
For 20 healthy adult female pigs weighed between 62.3±2.2 kilograms, we did aortic compute tomography angiography (CTA) examinations and measured morphologic parameters of aortic root. Then we accordingly customized the valved-fenestrated-bifurcated endograft. The endograft was delivered through transapical access and endovascularly reconstructed the segment from aortic valve to proximal part of aortic arch. The overall technical success rate was 95% because of one case of delivery system failure. Instant transesophageal echography (TEE) and aortic CTA confirmed ideal position of the endograft, satisfactory function of aortic valve, and the patency of coronary arteries in all subjects. During follow-up, 12 subjects were sacrificed according to the plan and seven were followed up for 8.1±3.6 months. There was one unplanned death of cardiac infection (unplanned mortality: 5.3%). Follow-up re-examinations (aortic CTA, cardiac ultrasound, and electrocardiogram) found no adverse events. Among 12 sacrificed subjects, there was no evidence of fenestrations alignment lost and no myocardial ischemia according to the pathological analysis.
Conclusion
The novel one-piece valved-fenestrated-bifurcated endografting might be feasible for minimal-invasive reconstruction of aortic root in animal models, thus provided a prospect to simultaneously treat pathologies involving aortic valve and aortic root in endovascular way.
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Affiliation(s)
- Z P Jing
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - J X Feng
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - X H Bao
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - T Li
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - Y Zhao
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - Y Li
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - Z J Li
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - J Liu
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - M W Wu
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - Z Q Zhao
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - Q S Lu
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - J M Bao
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - R Feng
- Changhai Hospital of Naval Military Medical University, Shanghai, China
| | - J Zhou
- Changhai Hospital of Naval Military Medical University, Shanghai, China
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Feng JX, Xu H, Ye SH, Ouyang G, Tong YX, Li GR. Corrigendum: Silica-Polypyrrole Hybrids as High-Performance Metal-Free Electrocatalysts for the Hydrogen Evolution Reaction in Neutral Media. Angew Chem Int Ed Engl 2019; 58:12327. [PMID: 31460697 DOI: 10.1002/anie.201908032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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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12
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Feng JX, Tong SY, Tong YX, Li GR. Correction to “Pt-like Hydrogen Evolution Electrocatalysis on PANI/CoP Hybrid Nanowires by Weakening the Shackles of Hydrogen Ions on the Surfaces of Catalysts”. J Am Chem Soc 2019; 141:13698. [DOI: 10.1021/jacs.9b06907] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Feng JX, Wu JQ, Tong YX, Li GR. Correction to "Efficient Hydrogen Evolution on Cu Nanodots-Decorated Ni 3S 2 Nanotubes by Optimizing Atomic Hydrogen Adsorption and Desorption". J Am Chem Soc 2019; 141:13697. [PMID: 31429555 DOI: 10.1021/jacs.9b06861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ye SH, Feng JX, Li GR. Correction to Pd Nanoparticle/CoP Nanosheet Hybrids: Highly Electroactive and Durable Catalysts for Ethanol Electrooxidation. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Feng JX, Tong SY, Tong YX, Li GR. Pt-like Hydrogen Evolution Electrocatalysis on PANI/CoP Hybrid Nanowires by Weakening the Shackles of Hydrogen Ions on the Surfaces of Catalysts. J Am Chem Soc 2018; 140:5118-5126. [DOI: 10.1021/jacs.7b12968] [Citation(s) in RCA: 368] [Impact Index Per Article: 61.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | | | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
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17
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Ye SH, Shi ZX, Feng JX, Tong YX, Li GR. Activating CoOOH Porous Nanosheet Arrays by Partial Iron Substitution for Efficient Oxygen Evolution Reaction. Angew Chem Int Ed Engl 2018; 57:2672-2676. [DOI: 10.1002/anie.201712549] [Citation(s) in RCA: 391] [Impact Index Per Article: 65.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Sheng-Hua Ye
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Zi-Xiao Shi
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
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18
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Ye SH, Shi ZX, Feng JX, Tong YX, Li GR. Activating CoOOH Porous Nanosheet Arrays by Partial Iron Substitution for Efficient Oxygen Evolution Reaction. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712549] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [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)
- Sheng-Hua Ye
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Zi-Xiao Shi
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-Sen University; Guangzhou 510275 China
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Feng JX, Wu JQ, Tong YX, Li GR. Efficient Hydrogen Evolution on Cu Nanodots-Decorated Ni3S2 Nanotubes by Optimizing Atomic Hydrogen Adsorption and Desorption. J Am Chem Soc 2018; 140:610-617. [DOI: 10.1021/jacs.7b08521] [Citation(s) in RCA: 442] [Impact Index Per Article: 73.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic
and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry and Energy
Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Jin-Qi Wu
- MOE Laboratory of Bioinorganic
and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry and Energy
Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic
and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry and Energy
Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic
and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry and Energy
Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
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20
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Dong YT, Feng JX, Li GR. Transition Metal Ion-Induced High Electrocatalytic Performance of Conducting Polymer for Oxygen and Hydrogen Evolution Reactions. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700359] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yu-Tao Dong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
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21
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Feng JX, Xu H, Ye SH, Ouyang G, Tong YX, Li GR. Silica-Polypyrrole Hybrids as High-Performance Metal-Free Electrocatalysts for the Hydrogen Evolution Reaction in Neutral Media. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702934] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Han Xu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Sheng-Hua Ye
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Gangfeng Ouyang
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
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22
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Feng JX, Xu H, Ye SH, Ouyang G, Tong YX, Li GR. Silica-Polypyrrole Hybrids as High-Performance Metal-Free Electrocatalysts for the Hydrogen Evolution Reaction in Neutral Media. Angew Chem Int Ed Engl 2017; 56:8120-8124. [DOI: 10.1002/anie.201702934] [Citation(s) in RCA: 186] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/06/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Han Xu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Sheng-Hua Ye
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Gangfeng Ouyang
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
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23
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Feng JX, Xu H, Dong YT, Lu XF, Tong YX, Li GR. Efficient Hydrogen Evolution Electrocatalysis Using Cobalt Nanotubes Decorated with Titanium Dioxide Nanodots. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611767] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Han Xu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Yu-Tao Dong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Xue-Feng Lu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
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24
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Feng JX, Xu H, Dong YT, Lu XF, Tong YX, Li GR. Efficient Hydrogen Evolution Electrocatalysis Using Cobalt Nanotubes Decorated with Titanium Dioxide Nanodots. Angew Chem Int Ed Engl 2017; 56:2960-2964. [DOI: 10.1002/anie.201611767] [Citation(s) in RCA: 272] [Impact Index Per Article: 38.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 12/30/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Han Xu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Yu-Tao Dong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Xue-Feng Lu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry; The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province; School of Chemistry; Sun Yat-sen University; Guangzhou 510275 China
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25
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Affiliation(s)
- Han Xu
- MOE Laboratory of Bioinorganic
and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry and Energy
Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Jin-Xian Feng
- MOE Laboratory of Bioinorganic
and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry and Energy
Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic
and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry and Energy
Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic
and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry and Energy
Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
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26
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Affiliation(s)
- Sheng-Hua Ye
- MOE Laboratory of Bioinorganic
and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
| | - Jin-Xian Feng
- MOE Laboratory of Bioinorganic
and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic
and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
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27
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Feng JX, Ye SH, Xu H, Tong YX, Li GR. Design and Synthesis of FeOOH/CeO2 Heterolayered Nanotube Electrocatalysts for the Oxygen Evolution Reaction. Adv Mater 2016; 28:4698-703. [PMID: 27072073 DOI: 10.1002/adma.201600054] [Citation(s) in RCA: 273] [Impact Index Per Article: 34.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 01/27/2016] [Indexed: 05/06/2023]
Abstract
FeOOH/CeO2 heterolayered nanotubes supported on Ni foam as efficient oxygen evolution electrocatalysts are reported. The hybrid structure can obviously promote the catalytic performance for the oxygen evolution reaction, such as low onset potential, high electroactivity, and excellent long-term durability. This study provides a new route to the design and fabrication of electrocatalysts with high electroactivity and durability for oxygen evolution.
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Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Sheng-Hua Ye
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Han Xu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, China
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28
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Feng JX, Xu H, Dong YT, Ye SH, Tong YX, Li GR. FeOOH/Co/FeOOH Hybrid Nanotube Arrays as High-Performance Electrocatalysts for the Oxygen Evolution Reaction. Angew Chem Int Ed Engl 2016; 55:3694-8. [DOI: 10.1002/anie.201511447] [Citation(s) in RCA: 516] [Impact Index Per Article: 64.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Han Xu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Yu-Tao Dong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Sheng-Hua Ye
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
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29
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Feng JX, Xu H, Dong YT, Ye SH, Tong YX, Li GR. FeOOH/Co/FeOOH Hybrid Nanotube Arrays as High-Performance Electrocatalysts for the Oxygen Evolution Reaction. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511447] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Han Xu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Yu-Tao Dong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Sheng-Hua Ye
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
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30
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Xu H, Ding LX, Feng JX, Li GR. Pt/Ni(OH) 2-NiOOH/Pd multi-walled hollow nanorod arrays as superior electrocatalysts for formic acid electrooxidation. Chem Sci 2015; 6:6991-6998. [PMID: 28757980 PMCID: PMC5510012 DOI: 10.1039/c5sc02544c] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [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: 07/14/2015] [Accepted: 08/28/2015] [Indexed: 11/21/2022] Open
Abstract
The catalytic activity and durability are crucial for the development of high-performance electrocatalysts. To design electrocatalysts with excellent electroactivity and durability, the structure and composition are two important guiding principles. In this work, novel Pt/Ni(OH)2-NiOOH/Pd multi-walled hollow nanorod arrays (MHNRAs) are successfully synthesized. The unique MHNRAs provide fast transport and short diffusion paths for electroactive species and high utilization rate of catalysts. Because of the special surface and synergistic effects, the Pt/Ni(OH)2-NiOOH/Pd MHNRA electrocatalysts exhibit high catalytic activity, high durability and superior CO poisoning tolerance for the electrooxidation of formic acid in comparison with Pt@Pd MHNRAs, commercial Pt/C, Pd/C and PtRu/C catalysts.
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Affiliation(s)
- Han Xu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry , KLGHEI of Environment and Energy Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-sen University , Guangzhou 510275 , China .
| | - Liang-Xin Ding
- School of Chemistry & Chemical Engineering , South China University of Technology , Guangzhou 510640 , China
| | - Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry , KLGHEI of Environment and Energy Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-sen University , Guangzhou 510275 , China .
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry , KLGHEI of Environment and Energy Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-sen University , Guangzhou 510275 , China .
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31
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Feng JX, Ding LX, Ye SH, He XJ, Xu H, Tong YX, Li GR. Co(OH)2 @PANI Hybrid Nanosheets with 3D Networks as High-Performance Electrocatalysts for Hydrogen Evolution Reaction. Adv Mater 2015; 27:7051-7. [PMID: 26436879 DOI: 10.1002/adma.201503187] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 08/31/2015] [Indexed: 05/05/2023]
Abstract
Hybrid electrocatalysts with excellent electrocatalytic activity for hydrogen reduction are fabricated using an efficient and facile electrochemical route. The electronic and synergistic effects between Co(OH)2 and polyaniline (PANI) in the composite structure are the key factors that generate the high electrocatalytic activity and excellent stability. A highly efficient, non-precious metal-based flexible electrocatalyst for high-performance electrocatalysts is shown, which reveals a novel route for the design and synthesis of electrocatalysts.
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Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Liang-Xin Ding
- School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Sheng-Hua Ye
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Xu-Jun He
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Han Xu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, P. R. China
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32
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Wang CH, Gao XJ, Liao SY, Feng JX, Luo B, Liu LX. [Transcriptome analysis of human breast cancer cell lines MCF-7 and MDA-MB- 435 by RNA-seq]. Mol Biol (Mosk) 2015; 49:279-88. [PMID: 26065255 DOI: 10.7868/s0026898415020159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The transcriptomic profiles of human breast cancer cell lines MCF-7 and MDA-MB-435 were investigated using the next-generation RNA sequencing (RNA-Seq). The DESeq package was used to screen the differentially expressed transcripts. A total of 229 genes with a significantly differential expression in MDA-MB-435 cells as compared with MCF-7 cells were obtained. Annotation of the biological functions of these genes through the Database for Annotation, Visualization and Integrated Discovery (DAVID) v6.7 demonstrated that the 229 differentially expressed genes were mainly implicated in the biological functions related to cell adhesion and motion, antigen processing and presentation (via MHC class II), hormone response, extracellular structure organization, tissue remodeling, and cell proliferation regulation. Analysis of the individual genes demonstrated that MDA-MB-435 cells exhibited a higher tendency to metastasis and antigen processing and presentation, and lower ability to hormone response. Twenty most abundant transcripts in MDA-MB-435 cells, such as VIM, TNC, and CD74, represent its high potential for metastasis. Besides the genes previously reported to be involved in tumor metastasis and development, genes newly identified in this study could provide new clues for the diagnosis and prognosis of aggressive breast cancers.
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33
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Feng JX, Ye SH, Lu XF, Tong YX, Li GR. Asymmetric Paper Supercapacitor Based on Amorphous Porous Mn3O4 Negative Electrode and Ni(OH)2 Positive Electrode: A Novel and High-Performance Flexible Electrochemical Energy Storage Device. ACS Appl Mater Interfaces 2015; 7:11444-51. [PMID: 25961565 DOI: 10.1021/acsami.5b02157] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Here we synthesize novel asymmetric all-solid-state paper supercapacitors (APSCs) based on amorphous porous Mn3O4 grown on conducting paper (NGP) (Mn3O4/NGP) negative electrode and Ni(OH)2 grown on NGP (Ni(OH)2/NGP) as positive electrode, and they have attracted intensive research interest owing to their outstanding properties such as being flexible, ultrathin, and lightweight. The fabricated APSCs exhibit a high areal Csp of 3.05 F/cm3 and superior cycling stability. The novel asymmetric APSCs also exhibit high energy density of 0.35 mW h/cm3, high power density of 32.5 mW/cm3, and superior cycling performance (<17% capacitance loss after 12,000 cycles at a high scan rate of 100 mV/s). This work shows the first example of amorphous porous metal oxide/NGP electrodes for the asymmetric APSCs, and these systems hold great potential for future flexible electronic devices.
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Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, No. 135 Xinguang Road, Guangzhou 510275, China
| | - Sheng-Hua Ye
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, No. 135 Xinguang Road, Guangzhou 510275, China
| | - Xue-Feng Lu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, No. 135 Xinguang Road, Guangzhou 510275, China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, No. 135 Xinguang Road, Guangzhou 510275, China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, No. 135 Xinguang Road, Guangzhou 510275, China
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34
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Xu XW, Gao XQ, Feng JX, Wang XD, Wei DZ. Influence of temperature on nucleus degradation of 4-androstene-3, 17-dione in phytosterol biotransformation by Mycobacterium sp. Lett Appl Microbiol 2015; 61:63-8. [PMID: 25868395 DOI: 10.1111/lam.12428] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 03/27/2015] [Accepted: 04/04/2015] [Indexed: 01/18/2023]
Abstract
UNLABELLED One of the steroid intermediates, 4-androstene-3, 17-dione (AD), in the biotransformation of phytosterols is valuable for the production of steroid medicaments. However, its degradation during the conversion process is one of the main obstacles to obtain high yields. In this study, the effect of temperature on nucleus degradation during microbial biotransformation of phytosterol was investigated. The results indicated that microbial degradation of phytosterol followed the AD-ADD-'9-OH-ADD' pathway, and that two important reactions involved in nucleus degradation, conversions of AD to ADD and ADD to 9-OH-ADD, were inhibited at 37°C. With a change in the culture temperature from 30 to 37°C, nucleus degradation was reduced from 39·9% to 17·6%, due to inhibition of the putative KstD and Ksh. These results suggested a simple way to decrease the nucleus degradation in phytosterol biotransformation and a new perspective on the possibilities of modifying the metabolism of strains used in industrial applications. SIGNIFICANCE AND IMPACT OF THE STUDY Nucleus degradation of products is one of the main problems encountered during phytosterol biotransformation. To solve this problem, the effect of temperature on nucleus degradation was investigated in the industrial production of steroid intermediates. The results are also helpful to the genetic modification of sterol-producing strains.
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Affiliation(s)
- X W Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - X Q Gao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - J X Feng
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - X D Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - D Z Wei
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
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35
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Wang AL, Xu H, Feng JX, Ding LX, Tong YX, Li GR. Design of Pd/PANI/Pd Sandwich-Structured Nanotube Array Catalysts with Special Shape Effects and Synergistic Effects for Ethanol Electrooxidation. J Am Chem Soc 2013; 135:10703-9. [DOI: 10.1021/ja403101r] [Citation(s) in RCA: 328] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- An-Liang Wang
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Han Xu
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Jin-Xian Feng
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Liang-Xin Ding
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Ye-Xiang Tong
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Gao-Ren Li
- MOE Laboratory
of Bioinorganic and Synthetic Chemistry,
KLGHEI of Environment and Energy Chemistry, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
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Li GR, Xu H, Lu XF, Feng JX, Tong YX, Su CY. Electrochemical synthesis of nanostructured materials for electrochemical energy conversion and storage. Nanoscale 2013; 5:4056-4069. [PMID: 23584514 DOI: 10.1039/c3nr00607g] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Electrochemical synthesis represents a highly efficient method for the fabrication of nanostructured energy materials, and various nanostructures, such as nanorods, nanowires, nanotubes, nanosheets, dendritic nanostructures, and composite nanostructures, can be easily fabricated with advantages of low cost, low synthetic temperature, high purity, simplicity, and environmental friendliness. The electrochemical synthesis, characterization, and application of electrochemical energy nanomaterials have advanced greatly in the past few decades, allowing an increasing understanding of nanostructure-property-performance relationships. Herein, we highlight some recent progress in the electrochemical synthesis of electrochemical energy materials with the assistance of additives and templates in solution or grafted onto metal or conductive polymer supports, with special attention to the effects on surface morphologies, structures and, more importantly, electrochemical performance. The methodology for preparing novel electrochemical energy nanomaterials and their potential applications has been summarized. Finally, we outline our personal perspectives on the electrochemical synthesis and applications of electrochemical energy nanomaterials.
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Affiliation(s)
- Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.
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37
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Feng JX, Hou FF, Liang M, Wang GB, Zhang X, Li HY, Xie D, Tian JW, Liu ZQ. Restricted intake of dietary advanced glycation end products retards renal progression in the remnant kidney model. Kidney Int 2007; 71:901-11. [PMID: 17342181 DOI: 10.1038/sj.ki.5002162] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [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: 12/26/2022]
Abstract
Diet-derived advanced glycation end products (AGEs) contribute significantly to accumulation of AGEs in renal insufficiency. To test whether modulation of dietary AGEs would impact on progression of chronic renal disease, 5/6 nephrectomy rats were randomly placed on three diets that differed only in AGEs content (low AGEs diet (LAD), high AGEs diet (HAD), and standard rodent diet (SRD)) for 5-13 weeks. Compared with SRD- or HAD-fed rats, LAD-treated animals showed decreased proteinuria and retarded decline of creatinine clearance without alteration of blood pressure. Glomerular volume was reduced by 23% compared with HAD-fed rats at week 13 (P<0.001). Renal fibrosis progressed with time in the remnant kidneys from HAD-fed rats. However, LAD-fed animals presented a better-preserved structure of the kidneys. LAD-fed rats demonstrated significantly decreased serum and renal AGEs concentration (P<0.01 and P<0.01). This was associated with marked decrease of intrarenal advanced oxidation protein products and thiobarbituric acid reactive substances, as well as increase of glutathione peroxidase activity. LAD treatment also downregulated expression of monocyte chemoattractant protein-1 and transforming growth factor-1 and ameliorated macrophage infiltration in the remnant kidney. These results demonstrated that restriction of dietary AGEs intake retards progression of renal fibrosis and dysfunction in the remnant kidney model.
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Affiliation(s)
- J X Feng
- Department of Medicine, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China
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38
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Feng JX, Karita S, Fujino E, Fujino T, Kimura T, Sakka K, Ohmiya K. Cloning, sequencing, and expression of the gene encoding a cell-bound multi-domain xylanase from Clostridium josui, and characterization of the translated product. Biosci Biotechnol Biochem 2000; 64:2614-24. [PMID: 11210125 DOI: 10.1271/bbb.64.2614] [Citation(s) in RCA: 17] [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: 11/08/2022]
Abstract
The nucleotide sequence of the Clostridium josui FERM P-9684 xyn10A gene, encoding a xylanase Xyn10A, consists of 3,150 bp and encodes 1,050 amino acids with a molecular weight of 115,564. Xyn10A is a multidomain enzyme composed of an N-terminal signal peptide and six domains in the following order: two thermostabilizing domains, a family 10 xylanase domain, a family 9 carbohydrate-binding module (CBM), and two S-layer homologous (SLH) domains. Immunological analysis indicated the presence of Xyn10A in the culture supernatant of C. josui FERM P-9684 and on the cell surface. The full-length Xyn10A expressed in a recombinant Escherichia coli strain bound to ball-milled cellulose (BMC) and the cell wall fragments of C. josui, indicating that both the CBM and the SLH domains are fully functional in the recombinant enzyme. An 85-kDa xylanase species derived from Xyn10A by partial proteolysis at the C-terminal side, most likely at the internal region of the CBM, retained the ability to bind to BMC. This observation suggests that the catalytic domain or the thermostabilizing domains are responsible for binding of the enzyme to BMC. Xyn10A-II, the 100-kDa derivative of Xyn10A, was purified from the recombinant E. coli strain and characterized. The enzyme was highly active toward xylan but not toward p-nitrophenyl-beta-D-xylopyranoside, p-nitrophenyl-beta-D-cellobioside, or carboxymethylcellulose.
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Affiliation(s)
- J X Feng
- Faculty of Bioresources, Mie University, Tsu, Japan
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Sun JJ, Zhou XD, Liu YK, Tang ZY, Feng JX, Zhou G, Xue Q, Chen J. Invasion and metastasis of liver cancer: expression of intercellular adhesion molecule 1. J Cancer Res Clin Oncol 1999; 125:28-34. [PMID: 10037274 DOI: 10.1007/s004320050238] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.3] [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: 12/16/2022]
Abstract
PURPOSE To study the relationship between intercellular adhesion molecule 1 (ICAM-1) and liver cancer metastasis and to find predicting factors that could indicate the growth and metastasis of liver cancer. METHODS ICAM-1 expression in fresh tissue of normal liver and hepatocellular cancer (HCC) was examined by immunoperoxidase staining. Serum soluble intercellular adhesion molecule 1 (sICAM-1) from patients with a benign HCC tumor, and the expression of ICAM-1 in the orthotopically transplanted LCI-D20 tumor of a nude mouse liver cancer metastasis model, and in human hepatoma, the tumor surrounding tissue and normal liver, was analyzed semiquantitatively by the immuno-dot blot method. Tissue ICAM-1 expression (mRNA level) was detected by Northern blotting. RESULTS ICAM-1 expression in LD1-20 D metastatic liver cancer had a positive correlation with tumor size and the time after implantation. It increased suddenly as metastasis occurred being 3.03+/-0.51 before metastasis and 8.24+/-0.95 after metastasis, P < 0.01, then remained high, appending on the number of sites involved (monosite metastasis 5.48+/-0.49, multisite metastasis 10.05+/-1.17, P < 0.05). All six cases of normal liver samples were negative in anti-ICAM-1 immunohistochemical staining, 80.0% (36/45) of the HCC showed some ICAM-1 expression. The rate of positive cells was a little higher in large tumors, tumors with an intact capsule and tumors with metastasis, but there was no significant difference. It was noticed that two cancer emboli also had high ICAM-1 expression. The ICAM-1 concentration in HCC (13.43+/-0.09) was higher than that in tumor surrounding the liver (5.89+/-0.17, P < 0.01) and that in normal liver (4.27+/-0.21, P < 0.01). sICAM-1, like tissue ICAM-1, was higher in HCC patients than in patients (with benign liver tumor and normal controls. Both tissue ICAM-1 and sICAM-1 were higher in the metastasis group than in the group without metastasis (tissue ICAM-1 20.24+/-0.30 vs 10.23+/-0.12 P < 0.05; sICAM-1 12.18+/-0.25 vs 9.77+/-0.54 P < 0.05). Northern blot analysis revealed that ICAM-1 expression, as indicated by mRNA level, was also higher in HCC and in cancer emboli than in tumor surrounding liver and normal liver. CONCLUSIONS Tissue ICAM-1 and serum sICAM-1 could indicate the stage of HCC, and the potential of hepatoma cells for invasion and metastasis. They may play an important role in the metastasis cascade.
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Affiliation(s)
- J J Sun
- Liver Cancer Institute, Shanghai Medical University, PR China
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Wilson TJ, Bertrand N, Tang JL, Feng JX, Pan MQ, Barber CE, Dow JM, Daniels MJ. The rpfA gene of Xanthomonas campestris pathovar campestris, which is involved in the regulation of pathogenicity factor production, encodes an aconitase. Mol Microbiol 1998; 28:961-70. [PMID: 9663682 DOI: 10.1046/j.1365-2958.1998.00852.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.9] [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: 11/20/2022]
Abstract
Xanthomonas campestris pv campestris (Xcc) is a plant pathogenic bacterium that controls the production of pathogenicity factors in part by a cluster of genes designated rpf (regulation of pathogenicity factors). Sequence analysis of one of these genes (rpfA) revealed an open reading frame with amino acid sequence similarity to aconitases from other bacteria. Aconitase activity was lower in cellular extracts of an rpfA::Tn5 mutant than in those from the wild type. A zymogram of aconitase activity after native gel electrophoresis showed the presence of two distinct aconitases in Xcc; the major aconitase was absent in the rpfA::Tn5 mutant. This mutant also had reduced levels of extracellular enzymes and extracellular polysaccharide (EPS). Supplying rpfA in trans to the rpfA::Tn5 mutant restored both the major aconitase activity and the synthesis of these pathogenicity factors. The transcription of the genes for two extracellular enzymes (prtA, encoding a serine protease, and engXCA, encoding endoglucanase) was reduced in the rpfA mutant background. Because some eukaryotic aconitases are also involved in iron regulation, we explored a possible connection between rpfA and iron metabolism. Intracellular iron levels in the mutants were lower than in the wild type as assessed by sensitivity to the iron-activated antibiotic, streptonigrin. Wild-type bacteria grown in iron-deficient conditions had a similar sensitivity to streptonigrin as the aconitase mutant. Overall, these results suggest that a prokaryotic aconitase can also act as a regulator of gene expression and that the regulation is possibly related to changes in intracellular iron levels.
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Affiliation(s)
- T J Wilson
- The Sainsbury Laboratory, John Innes Centre, Norwich Research Park, UK.
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Barber CE, Tang JL, Feng JX, Pan MQ, Wilson TJ, Slater H, Dow JM, Williams P, Daniels MJ. A novel regulatory system required for pathogenicity of Xanthomonas campestris is mediated by a small diffusible signal molecule. Mol Microbiol 1997; 24:555-66. [PMID: 9179849 DOI: 10.1046/j.1365-2958.1997.3721736.x] [Citation(s) in RCA: 399] [Impact Index Per Article: 14.8] [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: 02/04/2023]
Abstract
Mutations in the seven clustered rpf genes cause downregulated synthesis of extracellular enzymes and reduced virulence of Xanthomonas campestris pathovar campestris (Xcc). The phenotype of mutants in one of the genes, rpfF, can be restored by a diffusible extracellular factor (DSF) produced by all Xcc strains tested, apart from rpfF and rpfB mutants. DSF accumulates in early stationary phase (when synthesis of enzymes is maximal), but levels decline subsequently. Addition of DSF to exponentially-growing wild-type bacteria does not cause precocious enzyme synthesis. rpfB and rpfF are expressed throughout growth, but the rate increases in early stationary phase. RpfB is predicted to be a long-chain fatty acyl CoA ligase, and RpfF shows some relatedness to enoyl CoA hydratases. The properties of DSF suggest that it may be a fatty-acid derivative, and certain lipid preparations possess DSF activity at higher concentrations. These include lipid extracts and acid-hydrolysed lipoplysaccharide and lipid A from Xcc, and purified dodecanoic and hydroxydodecanoic acid. DSF production is confined to certain xanthomonads. We propose a model for the DSF system, which represents a novel mechanism for regulating virulence factor synthesis in response to physiological or environmental changes.
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Affiliation(s)
- C E Barber
- Sainsbury Laboratory, John Innes Centre, Norwich Research Park, UK
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Tang JL, Feng JX, Li QQ, Wen HX, Zhou DL, Wilson TJ, Dow JM, Ma QS, Daniels MJ. Cloning and characterization of the rpfC gene of Xanthomonas oryzae pv. oryzae: involvement in exopolysaccharide production and virulence to rice. Mol Plant Microbe Interact 1996; 9:664-666. [PMID: 8810082 DOI: 10.1094/mpmi-9-0664] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
rpfC is one of a cluster of genes which coordinately regulate the synthesis of extracellular enzymes and exopolysaccharide and pathogenicity in Xanthomonas campestris pv. campestris, the black rot pathogen of brassicas. An rpfC homolog which could functionally complement an rpfC mutant of X. campestris pv. campestris was identified in Xanthomonas oryzae pv. oryzae and the gene was characterized. Mutation of this gene in X. oryzae pv. oryzae had no effect on extracellular enzymes, but exopolysaccharide synthesis and virulence to rice were substantially reduced.
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Affiliation(s)
- J L Tang
- Laboratory of Molecular Genetics, Guangxi Agricultural University, Nanning, P.R. China
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Kasser RJ, Renner KJ, Feng JX, Brazell MP, Adams RN. Spreading depression induced by 100 mM KCl in caudate is blocked by local anesthesia of the substantia nigra. Brain Res 1988; 475:333-44. [PMID: 3145783 DOI: 10.1016/0006-8993(88)90622-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Pressure-ejection of 100 mM KCl was used to induce voltammetric signals in the rat caudate. The signals, detected chronoamperometrically with Nafion-coated carbon fiber microelectrodes, were reproducibly generated at 20-min intervals up to distances of 1600 micron from the KCl stimulus site. Unilateral 6-hydroxydopamine lesions of the substantia nigra (SN) demonstrated that over 90% of the voltammetric signal generated was dopamine. Evaluation of the signal onset at two widely spaced electrodes suggested that injection of nl volumes of 100 mM KCl into the rat caudate generates voltammetric signals which resemble spreading depression (SD) produced by more classical methods (e.g. 1 M KCl). We further investigated this phenomenon by simultaneous evaluation of extracellular K+ ion concentration changes, field potential (FP) and voltammetric signals or multiunit activity following stimulation with 100 mM or 1 M KCl. The results show that the signals generated by 100 mM KCl have many of the attributes of 'classical' SD, although the extracellular K+ ion concentration changes and FP changes were smaller in magnitude. However, the characteristic burst of multiunit activity followed by a marked quiescent period found during 1 M KCl stimulation was not observed with 100 mM KCl stimulation. Furthermore, application of 0.5% lidocaine to the SN reversibly blocked all signals generated by 100 mM KCl in the caudate while similar treatment with up to 2% lidocaine was ineffective when 1 M KCl was used as the stimulus. The results suggest that the signals generated by 100 mM KCl may represent an attenuated form of SD which requires a functioning SN, and that this stimulation could be a useful model for studying neurotransmitter interactions in the propagation of the SD phenomena.
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Affiliation(s)
- R J Kasser
- Department of Chemistry, University of Kansas, Lawrence 66045
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Feng JX, Brazell M, Renner K, Kasser R, Adams RN. Electrochemical pretreatment of carbon fibers for in vivo electrochemistry: effects on sensitivity and response time. Anal Chem 1987; 59:1863-7. [PMID: 3631509 DOI: 10.1021/ac00141a028] [Citation(s) in RCA: 86] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Ren LJ, Xie FZ, Feng JX, Xue Z. [Chemical constituents of Zanthoxylum podocarpum Hemsl]. Yao Xue Xue Bao 1984; 19:268-273. [PMID: 6496103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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