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Wang G, Zhang ZX, Chen H, Fu Y, Xiang K, Han E, Wu T, Bai Q, Su PY, Wang Z, Liu D, Shen F, Liu H, Jiang Z, Yuan J, Li Y, Wang P. Synthesis of a Triangle-Fused Six-Pointed Star and Its Electrocatalytic CO 2 Reduction Activity. Inorg Chem 2024; 63:7442-7454. [PMID: 38606439 DOI: 10.1021/acs.inorgchem.4c00550] [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] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
As electrocatalysts, molecular catalysts with large aromatic systems (such as terpyridine, porphyrin, or phthalocyanine) have been widely applied in the CO2 reduction reaction (CO2RR). However, these monomeric catalysts tend to aggregate due to strong π-π interactions, resulting in limited accessibility of the active site. In light of these challenges, we present a novel strategy of active site isolation for enhancing the CO2RR. Six Ru(Tpy)2 were integrated into the skeleton of a metallo-organic supramolecule by stepwise self-assembly in order to form a rhombus-fused six-pointed star R1 with active site isolation. The turnover frequency (TOF) of R1 was as high as 10.73 s-1 at -0.6 V versus reversible hydrogen electrode (vs RHE), which is the best reported value so far at the same potential to our knowledge. Furthermore, by increasing the connector density on R1's skeleton, a more stable triangle-fused six-pointed star T1 was successfully synthesized. T1 exhibits exceptional stability up to 126 h at -0.4 V vs RHE and excellent TOF values of CO. The strategy of active site isolation and connector density increment significantly enhanced the catalytic activity by increasing the exposure of the active site. This work provides a starting point for the design of molecular catalysts and facilitates the development of a new generation of catalysts with a high catalytic performance.
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Affiliation(s)
- Guotao Wang
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, Hunan 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha, Hunan 410083, China
| | - Zi-Xi Zhang
- Department of Organic and Polymer Chemistry and Hunan Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
| | - Hao Chen
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, Hunan 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha, Hunan 410083, China
| | - Yingxue Fu
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, Hunan 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha, Hunan 410083, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, Hunan 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha, Hunan 410083, China
| | - Ermeng Han
- Department of Organic and Polymer Chemistry and Hunan Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
| | - Tun Wu
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou 510006, China
| | - Qixia Bai
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou 510006, China
| | - Pei-Yang Su
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou 510006, China
| | - Zhujiang Wang
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, Hunan 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha, Hunan 410083, China
| | - Die Liu
- Department of Organic and Polymer Chemistry and Hunan Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
| | - Fenghua Shen
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, Hunan 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha, Hunan 410083, China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, Hunan 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha, Hunan 410083, China
| | - Zhilong Jiang
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou 510006, China
| | - Jie Yuan
- School of Chemistry and Chemical Engineering, Henan Normal University Xinxiang, Xinxiang, Henan 453007, China
| | - Yiming Li
- Department of Organic and Polymer Chemistry and Hunan Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
| | - Pingshan Wang
- Department of Organic and Polymer Chemistry and Hunan Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou 510006, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha, Hunan 410083, China
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Li C, Xiang K, Shen F, Wu J, Chen H, Liu C, Yuan J, Xie X, Yang W, Liu H. Constructing Heterointerfaces in Dual-Phase High-Entropy Oxides to Boost O 2 Activation and SO 2 Resistance for Mercury Removal in Flue Gas. ACS Appl Mater Interfaces 2024. [PMID: 38410050 DOI: 10.1021/acsami.3c18372] [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: 02/28/2024]
Abstract
The low O2 activation ability at low temperatures and SO2 poisoning are challenges for metal oxide catalysts in the application of Hg0 removal in flue gas. A novel high-entropy fluorite oxide (MgAlMnCo)CeO2 (Co-HEO) with the second phase of spinel is synthesized by the microwave hydrothermal method for the first time. A high efficiency of Hg0 removal (close to 100%) is achieved by Co-HEO catalytic oxidation at temperatures as low as 100 °C and in the atmosphere of 145 μg m-3 Hg0 at a high GHSV (gas hourly space velocity) of 95,000 h-1. According to O2-TPD and in situ FT-IR, this extremely superior catalytic oxidation performance at low temperatures originates from the activation ability of Co-HEO to transform O2 into superoxide and peroxide, which is promoted by point defects induced from the spinel/fluorite heterointerfaces. Meanwhile, SO2 resistance of Co-HEO for Hg0 removal is also improved up to 2000 ppm due to the high-entropy-stabilized structure, construction of heterointerfaces, and synergistic effect of the multicomponents for inhibiting the oxidation of SO2 to surface sulfate. The design strategy of the dual-phase high-entropy material launches a new route for metal oxides in the application of catalytic oxidation and SO2 resistance.
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Affiliation(s)
- Chaofang Li
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Fenghua Shen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Jun Wu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Hao Chen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Cao Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Jing Yuan
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Xiaofeng Xie
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Weichun Yang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
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Xie X, Chen H, Liu X, Fu Y, Liu Z, Shen F, Xiang K, Liu H. Synergy of copper vacancies and amorphous regions in copper sulfides enables superior capacity for Hg 0 adsorption. J Hazard Mater 2024; 462:132273. [PMID: 37832439 DOI: 10.1016/j.jhazmat.2023.132273] [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] [Received: 02/26/2023] [Revised: 08/08/2023] [Accepted: 08/10/2023] [Indexed: 10/15/2023]
Abstract
Adsorption is a high-efficiency and low-cost approach to control elemental mercury emission from industrial flue gas. However, the adsorption capacity is unsatisfactory due to its surface-only adsorption. In this work, a facile method was used for preparing the crystalline-amorphous co-existed copper sulfides (CA-CuS) with an abundance of copper vacancies and amorphous regions through temperature-controlled ultrasonic cavitation. The CA-CuS was used in the flue gas wet scrubbing and displayed outstanding Hg0 capture performance, achieving a removal efficiency of 99.8% and an adsorption capacity up to 573.8 mg·g-1 with a sulfur atomic utilization ratio of 27.5%. Experimental results and density functional theory (DFT) calculation verified that the copper vacancies at di-coordinated sites led to the formation of robust mercury binding sites (i.e., S2-(CN=3)) and unsaturated coordinated oxidizing sites (i.e., S22-). Meanwhile, the amorphous regions facilitated the internal migration of adsorbed mercury on the surface and promote the exchange with Cu2+ in the interior of adsorbents. The synergistic effect of copper vacancies and amorphous regions enables superior mercury adsorption capability and high atomic utilization.
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Affiliation(s)
- Xiaofeng Xie
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Hao Chen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Xudong Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Yingxue Fu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Zhilou Liu
- School of Metallurgical Engineering, JiangXi University of Science and Technology, Ganzhou 341000, China
| | - Fenghua Shen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China.
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China.
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4
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Liu H, Wang Z, Chen H, Tu Y, Wu J, Shen F, Liu X, Fu Y, Wu L, Long J, Xiang K. Nafion-Mediated Proton Transfer Facilitates the Electroreduction of SO 2 to H 2S. ACS Appl Mater Interfaces 2023; 15:58508-58516. [PMID: 38062744 DOI: 10.1021/acsami.3c14546] [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: 12/22/2023]
Abstract
The electrocatalytic reduction of SO2 to produce H2S is a critical approach for achieving the efficient utilization of sulfur resources. At the core of this approach for commercial applications lies the imperative need to elevate current density. However, the challenges posed by high current density manifest in the rapid depletion of protons, leading to a decrease in SO2 partial pressure, consequently hampering the generation and separation of H2S. Here, we demonstrate an effective solution to alleviate the problem of insufficient supply of protons by employing Nafion polymer as the proton conductor to modified Cu catalysts surface, creating a proton-enriched layer to boost H2S generation. It was observed that Nafion shortens the hydrogen bonds with water molecules in the electrolyte via its sulfonic acid groups, benefiting the proton transfer and consequently increasing the proton density on the electrode surface by 5-fold. With the Nafion-modified catalyst, the H2S partial current density and separation efficiency reached 205.9 mA·cm-2 (1.01 mmol·cm-2·h-1) and 87.8%, which were 1.34 and 1.22 times that on unmodified Cu, respectively. This work highlights the practicality of fabricating a proton conductor via ionic polymer for the control over product selectivity in pH-sensitive reactions under high current density.
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Affiliation(s)
- Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Zhujiang Wang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Hao Chen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Yushan Tu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Jun Wu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Fenghua Shen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Xudong Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Yingxue Fu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Lin Wu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Jiaqi Long
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
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5
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Gouraud C, Thoreux P, Ouazana-Vedrines C, Pitron V, Betouche S, Bolloch K, Caumes E, Guemouni S, Xiang K, Lemogne C, Ranque B. Patients with persistent symptoms after COVID-19 attending a multidisciplinary evaluation: Characteristics, medical conclusions, and satisfaction. J Psychosom Res 2023; 174:111475. [PMID: 37741114 DOI: 10.1016/j.jpsychores.2023.111475] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 05/20/2023] [Revised: 08/19/2023] [Accepted: 08/22/2023] [Indexed: 09/25/2023]
Abstract
OBJECTIVE Among patients attending a multidisciplinary day-hospital program for persistent symptoms after COVID-19, we aimed i) to describe their characteristics ii) to present the medical conclusions (diagnoses and recommendations) and iii) to assess the patients' satisfaction and its correlates. METHODS For this retrospective chart review study, frequent symptoms were systematically assessed. Standardized questionnaires explored fatigue (Pichot scale), physical activity (Ricci & Gagnon scale), health-related quality of life (Short-Form Health Survey), anxiety and depressive symptoms (Hospital Anxiety and Depression scale) and associated psychological burden (Somatic-Symptom-Disorder B criteria Scale). Medical record conclusions were collected and a satisfaction survey was performed at 3-months follow-up. RESULTS Among 286 consecutive patients (median age: 44 years; 70% women), the most frequent symptoms were fatigue (86%), breathlessness (65%), joint/muscular pain (61%) and cognitive dysfunction (58%), with a median duration of 429 days (Inter-quartile range (IqR): 216-624). Questionnaires revealed low levels of physical activity and quality of life, and high levels of fatigue, anxiety, depression, and psychological burden, with 32% and 23% meeting the diagnostic criteria for a depressive or anxiety disorder, respectively. Positive arguments for a functional somatic disorder were found in 76% of patients, including 96% with no abnormal clinical or test findings that may explain the symptoms. Physical activity rehabilitation was recommended for 91% of patients. Patients' median satisfaction was 8/10 (IqR: 6-9). CONCLUSION Most patients attending this program presented with long-lasting symptoms and severe quality of life impairment, received a diagnosis of functional somatic disorder, and reported high levels of satisfaction regarding the program.
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Affiliation(s)
- C Gouraud
- Université Paris Cité and Université Sorbonne Paris Nord, Inserm, INRAE, Center for Research in Epidemiology and Statistics (CRESS), F-75004 Paris, France; Service de Psychiatrie de l'adulte, AP-HP, Hôpital Hôtel-Dieu, F-75004 Paris, France.
| | - P Thoreux
- Université Paris Cité, Faculté de Santé, UFR de Médecine, F- 75006 Paris, France; CIMS (Centre d'Investigations en Médecine du Sport), APHP, Hôpital Hôtel Dieu, F-75004 Paris, France
| | - C Ouazana-Vedrines
- Université Paris Cité and Université Sorbonne Paris Nord, Inserm, INRAE, Center for Research in Epidemiology and Statistics (CRESS), F-75004 Paris, France; Service de Psychiatrie de l'adulte, AP-HP, Hôpital Hôtel-Dieu, F-75004 Paris, France
| | - V Pitron
- Université Paris Cité, VIFASOM (Vigilance Fatigue Sommeil et Santé Publique), F-75004 Paris, France; Centre du Sommeil et de la Vigilance-Pathologie Professionnelle, APHP, Hôtel-Dieu, F-75004 Paris, France
| | - S Betouche
- Unité CASPer, AP-HP, Hôpital Hôtel-Dieu, Paris, France
| | - K Bolloch
- CIMS (Centre d'Investigations en Médecine du Sport), APHP, Hôpital Hôtel Dieu, F-75004 Paris, France
| | - E Caumes
- Service de Prise en Charge Ambulatoire des Maladies Infectieuses, APHP, Hôtel-Dieu, F-75004 Paris, France
| | - S Guemouni
- Université Paris Cité and Université Sorbonne Paris Nord, Inserm, INRAE, Center for Research in Epidemiology and Statistics (CRESS), F-75004 Paris, France
| | - K Xiang
- Unité CASPer, AP-HP, Hôpital Hôtel-Dieu, Paris, France
| | - C Lemogne
- Université Paris Cité and Université Sorbonne Paris Nord, Inserm, INRAE, Center for Research in Epidemiology and Statistics (CRESS), F-75004 Paris, France; Service de Psychiatrie de l'adulte, AP-HP, Hôpital Hôtel-Dieu, F-75004 Paris, France
| | - B Ranque
- Unité CASPer, AP-HP, Hôpital Hôtel-Dieu, Paris, France; Service de Prise en Charge Ambulatoire des Maladies Infectieuses, APHP, Hôtel-Dieu, F-75004 Paris, France; Service de Médecine interne, AP-HP, Hôpital européen Georges-Pompidou, F-75015 Paris, France
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6
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Liu C, Xiang K, Li J, Li C, Liu L, Shen F, Liu H. Edge-Enriched Molybdenum Disulfide Ultrathin Nanosheets with a Widened Interlayer Spacing for Highly Efficient Gaseous Elemental Mercury Capture. Environ Sci Technol 2023. [PMID: 37319319 DOI: 10.1021/acs.est.3c03065] [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: 06/17/2023]
Abstract
Transition metal sulfides have exhibited remarkable advantages in gaseous elemental mercury (Hg0) capture under high SO2 atmosphere, whereas the weak thermal stability significantly inhibits their practical application. Herein, a novel N,N-dimethylformamide (DMF) insertion strategy via crystal growth engineering was developed to successfully enhance the Hg0 capture ability of MoS2 at an elevated temperature for the first time. The DMF-inserted MoS2 possesses an edge-enriched structure and an expanded interlayer spacing (9.8 Å) and can maintain structural stability at a temperature as high as 272 °C. The saturated Hg0 adsorption capacities of the DMF-inserted MoS2 were measured to be 46.91 mg·g-1 at 80 °C and 27.40 mg·g-1 at 160 °C under high SO2 atmosphere. The inserted DMF molecules chemically bond with MoS2, which prevents possible structural collapse at a high temperature. The strong interaction of DMF with MoS2 nanosheets facilitates the growth of abundant defects and edge sites and enhances the formation of Mo5+/Mo6+ and S22- species, thereby improving the Hg0 capture activity at a wide temperature range. Particularly, Mo atoms on the (100) plane represent the strongest active sites for Hg0 oxidation and adsorption. The molecule insertion strategy developed in this work provides new insights into the engineering of advanced environmental materials.
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Affiliation(s)
- Cao Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Junyuan Li
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Chaofang Li
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Lele Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Fenghua Shen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-Ferrous Metals, Central South University, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-Ferrous Metals, Central South University, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
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7
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Xie X, Chen H, Liu X, Xiang K, Liu H. Achieving Large-Capability Adsorption of Hg 0 in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO 2 Atmosphere. Materials (Basel) 2023; 16:3157. [PMID: 37109995 PMCID: PMC10144309 DOI: 10.3390/ma16083157] [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] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/13/2023] [Accepted: 04/13/2023] [Indexed: 06/19/2023]
Abstract
This paper reports on a novel method to remove Hg0 in the wet scrubbing process using defect-rich colloidal copper sulfides for reducing mercury emissions from non-ferrous smelting flue gas. Unexpectedly, it migrated the negative effect of SO2 on mercury removal performance, while also enhancing Hg0 adsorption. Colloidal copper sulfides demonstrated the superior Hg0 adsorption rate of 306.9 μg·g-1·min-1 under 6% SO2 + 6% O2 atmosphere with a removal efficiency of 99.1%, and the highest-ever Hg0 adsorption capacity of 736.5 mg·g-1, which was 277% higher than all other reported metal sulfides. The Cu and S sites transformation results reveal that SO2 could transform the tri-coordinate S sites into S22- on copper sulfides surfaces, while O2 regenerated Cu2+ via the oxidation of Cu+. The S22- and Cu2+ sites enhanced Hg0 oxidation, and the Hg2+ could strongly bind with tri-coordinate S sites. This study provides an effective strategy to achieve large-capability adsorption of Hg0 from non-ferrous smelting flue gas.
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Affiliation(s)
- Xiaofeng Xie
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Hao Chen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Xudong Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-Ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- State Key Laboratory of Advanced Metallurgy for Non-Ferrous Metals, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
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8
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Liu X, Wu L, Wang Z, Fu Y, Xie X, Chen H, Long J, Xiang K, Liu H. Influence of the Interface Wettability of Membranes on Electrolysis Reduction of SO 2 to H 2S. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Xudong Liu
- School of Metallurgy and Environment, Central South University, Changsha, Hunan410083, P. R. China
| | - Lin Wu
- School of Metallurgy and Environment, Central South University, Changsha, Hunan410083, P. R. China
| | - Zhujiang Wang
- School of Metallurgy and Environment, Central South University, Changsha, Hunan410083, P. R. China
| | - Yingxue Fu
- School of Metallurgy and Environment, Central South University, Changsha, Hunan410083, P. R. China
| | - Xiaofeng Xie
- School of Metallurgy and Environment, Central South University, Changsha, Hunan410083, P. R. China
| | - Hao Chen
- School of Metallurgy and Environment, Central South University, Changsha, Hunan410083, P. R. China
| | - Jiaqi Long
- School of Metallurgy and Environment, Central South University, Changsha, Hunan410083, P. R. China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha, Hunan410083, P. R. China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, Hunan410083, P. R. China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha, Hunan410083, P. R. China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, Hunan410083, P. R. China
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9
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Liu C, Xiang K, Li J, Liu H, Shen F. Controllable Disordered Copper Sulfide with a Sulfur-Rich Interface for High-Performance Gaseous Elemental Mercury Capture. Environ Sci Technol 2022; 56:13664-13674. [PMID: 36154115 DOI: 10.1021/acs.est.2c04859] [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: 06/16/2023]
Abstract
Copper sulfide (CuS) has received increasing attention as a promising material in gaseous elemental mercury (Hg0) capture, yet how to enhance its activity at elevated temperature remains a great challenge for practical application. Herein, simultaneous improvement in the activity and thermal stability of CuS toward Hg0 capture was successfully achieved for the first time by controlling the crystal growth. CuS with a moderate crystallinity degree of 68.8% showed a disordered structure yet high thermal stability up to 180 °C. Such disordered CuS can maintain its Hg0 capture activity stable during longtime test at a wide temperature range from 60 to 180 °C and displayed strong resistance to SO2 (6%) and H2O (8%). The significant improvement can be attributed to the synergistic effect of a moderately crystalline nature and a unique sulfur-rich interface. Moderate crystallinity guarantees the thermal stability of CuS and the presence of abundant defects, in which copper vacancy enhances significantly the Hg0 capture activity. The sulfur-rich interface enables CuS to provide plentiful highly active Sx2- sites for Hg0 adsorption. The interrelation between structure, reactivity, and thermal stability clarified in this work broadens the understanding toward Hg0 oxidation and adsorption over CuS and provides new insights into the rational design and engineering of advanced environmental materials.
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Affiliation(s)
- Cao Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Kaisong Xiang
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
- School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Junyuan Li
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Fenghua Shen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
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10
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Shen F, He S, Li J, Liu C, Xiang K, Liu H. Formation of sulfur oxide groups by SO 2 and their roles in mercury adsorption on carbon-based materials. J Environ Sci (China) 2022; 119:44-49. [PMID: 35934464 DOI: 10.1016/j.jes.2021.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 11/08/2021] [Accepted: 11/10/2021] [Indexed: 06/15/2023]
Abstract
The presence of SO2 display significant effect on the mercury (Hg) adsorption ability of carbon-based sorbent. Yet the adsorption and oxidation of SO2 on carbon with oxygen group, as well as the roles of different sulfur oxide groups in Hg adsorption have heretofore been unclear. The formation of sulfur oxide groups by SO2 and their effects on Hg adsorption on carbon was detailed examined by the density functional theory. The results show that SO2 can be oxidized into SO3 by oxygen group on carbon surface. Both C-SO2 and C-SO3 can improve Hg adsorption on carbon site, while the promotive effect of C-SO2 is stronger than C-SO3. Electron density difference analyses reveal that sulfur oxide groups enhance the charge transfer ability of surface unsaturated carbon atom, thereby improving Hg adsorption. The experimental results confirm that surface active groups formed by SO2 adsorption is more active for Hg adsorption than the groups generated by SO3.
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Affiliation(s)
- Fenghua Shen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Shudan He
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Junyuan Li
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Cao Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China.
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11
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Zheng X, Chen S, Liu W, Xiang K, Liu H. The Design of Sulfated Ce/HZSM-5 for Catalytic Decomposition of CF4. Polymers (Basel) 2022; 14:polym14132717. [PMID: 35808762 PMCID: PMC9268841 DOI: 10.3390/polym14132717] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 06/23/2022] [Accepted: 06/30/2022] [Indexed: 11/21/2022] Open
Abstract
CF4 has a global warming potential of 6500 and possesses a lifetime of 50,000 years. In this study, we modified the HZSM-5 catalyst with Ce and sulfuric acid treatment. The S/Ce/HZSM-5 catalyst achieves 41% of CF4 conversion at 500 °C, which is four times higher than that over Ce/HZSM-5, while the HZSM-5 exhibits no catalytic activity. The effects of modification were studied by using NH3-TPD, FT-IR of pyridine adsorption, and XPS methods. The results indicated that the modification, especially the sulfuric acid treatment, strongly increased the Lewis acidic sites, strong acidic sites, and moderate acidic sites on catalysts, which are the main active centers for CF4 decomposition. The mechanism of acidic sites increases by modification and CF4 decomposition is clarified. The results of this work will help the development of more effective catalysts for CF4 decomposition.
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Affiliation(s)
- Xie Zheng
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; (X.Z.); (S.C.); (W.L.); (H.L.)
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Shijie Chen
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; (X.Z.); (S.C.); (W.L.); (H.L.)
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Wanning Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; (X.Z.); (S.C.); (W.L.); (H.L.)
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Kaisong Xiang
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
- School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
- Correspondence: ; Tel.: +86-731-88830875; Fax: +86-731-88710171
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; (X.Z.); (S.C.); (W.L.); (H.L.)
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
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12
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Liu H, Chen H, Xie X, Li C, Shen F, Wang P, Xiang K. Low-temperature Hg 0 abatement by ionic liquid based on weak interaction. J Hazard Mater 2022; 426:127836. [PMID: 34865905 DOI: 10.1016/j.jhazmat.2021.127836] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/11/2021] [Accepted: 11/15/2021] [Indexed: 06/13/2023]
Abstract
Low-temperature gaseous elemental mercury (Hg0) abatement is an objective demand in industrial flue gas treatment. In this work, we proposed a new approach for Hg0 capture via weak interaction of ionic liquids. Ionic liquids with varied anions (1-butyl-3-methylimidazolium thioacetate ([Bmim][ThAc]), 1-butyl-3-methylimidazolium diethyldithiocarbamate ([Bmim][DTCR]), and 1-butyl-3-methylimidazolium ethylxanthate ([Bmim][EX])) were designed and synthesized. The interaction energies between ionic liquids and elemental mercury were proved to be positively related to mercury removal efficiency, revealing that the electrostatic interaction derived physical adsorption from anions is the dominant factor affecting mercury removal performance. [Bmim][ThAc] with the largest anionic electrostatic interaction energy showed the best mercury abatement performance, achieving a Hg0 removal efficiency of over 98% and an adsorption capacity of 10.66 mg/g at 50 °C. The influence of temperature and the results of mercury temperature-programmed desorption (Hg-TPD), X-ray photoelectron spectroscopy (XPS) further confirmed that the ionic liquid combines with elemental mercury through physical adsorption. The work provides a new perspective on designing high-efficiency sorbents for mercury removal at low temperature.
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Affiliation(s)
- Hui Liu
- School of Metallurgy and Environment, Central South University, 932 South Lushan Rd, Changsha, Hunan 410083, PR China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, 932 South Lushan Rd, Changsha, Hunan 410083, PR China
| | - Hao Chen
- School of Metallurgy and Environment, Central South University, 932 South Lushan Rd, Changsha, Hunan 410083, PR China
| | - Xiaofeng Xie
- School of Metallurgy and Environment, Central South University, 932 South Lushan Rd, Changsha, Hunan 410083, PR China
| | - Chaofang Li
- School of Metallurgy and Environment, Central South University, 932 South Lushan Rd, Changsha, Hunan 410083, PR China
| | - Fenghua Shen
- School of Metallurgy and Environment, Central South University, 932 South Lushan Rd, Changsha, Hunan 410083, PR China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, 932 South Lushan Rd, Changsha, Hunan 410083, PR China
| | - Pingshan Wang
- College of Chemistry and Chemical Engineering, Central South University, 932 South Lushan Rd, Changsha, Hunan 410083, PR China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, 932 South Lushan Rd, Changsha, Hunan 410083, PR China; College of Chemistry and Chemical Engineering, Central South University, 932 South Lushan Rd, Changsha, Hunan 410083, PR China.
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13
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Wei X, Min Y, Feng Y, He D, Zeng X, Huang Y, Fan S, Chen H, Chen J, Xiang K, Luo H, Yin G, Hu D. Development and validation of an individualized nomogram for predicting the high-volume (> 5) central lymph node metastasis in papillary thyroid microcarcinoma. J Endocrinol Invest 2022; 45:507-515. [PMID: 34491546 DOI: 10.1007/s40618-021-01675-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Accepted: 09/03/2021] [Indexed: 01/30/2023]
Abstract
PURPOSE Papillary thyroid microcarcinoma (PTMC) frequently presents a favorable clinical outcome, while aggressive invasiveness can also be found in some of this population. Identifying the risk clinical factors of high-volume (> 5) central lymph node metastasis (CLNM) in PTMC patients could help oncologists make a better-individualized clinical decision. METHODS We retrospectively reviewed the clinical characteristics of adult patients with PTC in the Surveillance, Epidemiology, and End Results (SEER) database between Jan 2010 and Dec 2015 and in one medical center affiliated to Chongqing Medical University between Jan 2018 and Oct 2020. Univariate and multivariate logistic regression analyses were used to determine the risk factors for high volume of CLNM in PTMC patients. RESULTS The male gender (OR = 2.02, 95% CI 1.46-2.81), larger tumor size (> 5 mm, OR = 1.64, 95% CI 1.13-2.38), multifocality (OR = 1.87, 95% CI 1.40-2.51), and extrathyroidal invasion (OR = 3.67; 95% CI 2.64-5.10) were independent risk factors in promoting high-volume of CLNM in PTMC patients. By contrast, elderly age (≥ 55 years) at diagnosis (OR = 0.57, 95% CI 0.40-0.81) and PTMC-follicular variate (OR = 0.60, 95% CI 0.42-0.87) were determined as the protective factors. Based on these indicators, a nomogram was further constructed with a good concordance index (C-index) of 0.702, supported by an external validating cohort with a promising C-index of 0.811. CONCLUSION A nomogram was successfully established and validated with six clinical indicators. This model could help surgeons to make a better-individualized clinical decision on the management of PTMC patients, especially in terms of whether prophylactic central lymph node dissection and postoperative radiotherapy should be warranted.
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Affiliation(s)
- X Wei
- Department of Internal Cardiology, The Second Affiliated Hospital, Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - Y Min
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - Y Feng
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - D He
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - X Zeng
- Department of Oncology, The Second Affiliated Hospital, Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - Y Huang
- Department of Pathology, The Second Affiliated Hospital of Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - S Fan
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - H Chen
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - J Chen
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - K Xiang
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - H Luo
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - G Yin
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China.
| | - D Hu
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No. 74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China.
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14
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Feng Y, Min Y, Chen H, Xiang K, Wang X, Yin G. Construction and validation of a nomogram for predicting cervical lymph node metastasis in classic papillary thyroid carcinoma. J Endocrinol Invest 2021; 44:2203-2211. [PMID: 33586026 DOI: 10.1007/s40618-021-01524-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 01/29/2021] [Indexed: 02/06/2023]
Abstract
PURPOSE Patients with papillary thyroid carcinoma (PTC) frequently present a relatively poor prognosis when they coexist with cervical lymph node metastasis (LNM). Moreover, it remains controversial whether prophylactic lymph node dissection (LND) should be performed for patients without clinically lymph node metastasis. Thus, we hereby develop a nomogram for predicting the cervical LNM (including central and lateral LNM) in patients with PTC. METHODS We retrospectively reviewed the clinical characteristics of adult patients with PTC in the surveillance, epidemiology, and end results (SEER) database between 2010 and 2015 and in our Department of Breast and Thyroid Surgery in the Second Affiliated Hospital of Chongqing Medical University between 2019 and 2020. RESULT A total of 21,972 patients in the SEER database and 747 patients in our department who met the inclusion criteria were enrolled in this study. Ultimately, six clinical features including age, gender, race, extrathyroidal invasion, multifocality, and tumor size were identified to be associated with cervical LNM in patients with PTC, which were screened to develop a nomogram. This model had satisfied discrimination with a concordance index (C-index) of 0.733, supported by both internal and external validation with a C-index of 0.731 and 0.716, respectively. A decision curve analysis was subsequently made to evaluate the feasibility of this nomogram for predicting cervical LNM. Besides, a positive correlation between nomogram score and the average number of lymph node metastases was observed in all groups. CONCLUSION This visualized multipopulational-based nomogram model was successfully established. We determined that various clinical characteristics were significantly associated with cervical LNM, which would be better helping clinicians make individualized clinical decisions for PTC patients.
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Affiliation(s)
- Y Feng
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No.74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - Y Min
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No.74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - H Chen
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No.74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - K Xiang
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No.74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - X Wang
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No.74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China
| | - G Yin
- Department of Breast and Thyroid Surgery, The Second Affiliated Hospital of Chongqing Medical University, No.74, Linjiang Rd, Yuzhong Dist, Chongqing, 404100, People's Republic of China.
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15
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Liu H, Li J, Xiang K, He S, Shen F. DFT and Experimental Studies on the Mechanism of Mercury Adsorption on O 2-/NO-Codoped Porous Carbon. ACS Omega 2021; 6:12343-12350. [PMID: 34056386 PMCID: PMC8154138 DOI: 10.1021/acsomega.1c01391] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
The utilization of O2 and NO in flue gas to activate the raw porous carbon with auxiliary plasma contributes to an effective mercury (Hg)-removal strategy. The lack of in-depth knowledge on the Hg adsorption mechanism over the O2-/NO-codoped porous carbon severely limits the development of a more effective Hg removal method and the potential application. Therefore, the generation processes of functional groups on the surface during plasma treatment were investigated and the detailed roles of different groups in Hg adsorption were clarified. The theoretical results suggest that the formation of functional groups is highly exothermic and they preferentially form on a carbon surface, and then affect Hg adsorption. The active groups affect Hg adsorption in a different manner, which depends on their nature. All of these active groups can improve Hg adsorption by enhancing the interaction of Hg with a surface carbon atom. Particularly, the preadsorbed NO2 and O3 groups can react directly with Hg by forming HgO. The experimental results confirm that the active groups cocontribute to the high Hg removal efficiency of O2-/NO-codoped porous carbon. In addition, the mercury temperature-programmed desorption results suggest that there are two forms of mercury present on O2-/NO-codoped porous carbon, including a carbon-bonded Hg atom and HgO.
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Affiliation(s)
- Hui Liu
- School
of Metallurgy and Environment, Central South
University, Changsha 410083, China
- Chinese
National Engineering Research Center for Control & Treatment of
Heavy Metal Pollution, Changsha 410083, China
| | - Junyuan Li
- School
of Metallurgy and Environment, Central South
University, Changsha 410083, China
| | - Kaisong Xiang
- School
of Metallurgy and Environment, Central South
University, Changsha 410083, China
| | - Shudan He
- School
of Metallurgy and Environment, Central South
University, Changsha 410083, China
| | - Fenghua Shen
- School
of Metallurgy and Environment, Central South
University, Changsha 410083, China
- Chinese
National Engineering Research Center for Control & Treatment of
Heavy Metal Pollution, Changsha 410083, China
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Xiang K, Liu Y, Yu H, Liu H, Li K. Strategies to improve the performance of copper-based catalyst for electroreduction of CO<sub>2</sub> to multi-carbon products. Chin Sci Bull 2020. [DOI: 10.1360/tb-2020-0014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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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Levine JL, Xiang K, Su J, Hsu S, Kim RJ, Elayi S, Catanzaro JN. P1021Comparative efficacy of microfidelity technology vs standard ablation for atrioventricular nodal ablation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0612] [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
Background
Microfidelity Cateter Technology has proven efficacy in ablating atrial arrhythmias in multiple pilot studies. Closely spaced radial microelectrodes render a focused near-field electrogram. Case series suggest that this catheter design facilitates accurate ablations with fewer radiofrequency (RF) lesions. Atrioventricular junction (AVJ) ablation is regarded as a straightforward procedure, but case records show wide variance in procedure times and number of RF lesions required.
Methods
Twenty-four patients scheduled for AVJ ablation were randomized to treatment with either the Microfidelity technology or standard 8mm/8 French ablation catheter. Both groups located the AVJ by fluoroscopic landmarks and His electrograms, and the MiFi group used electroanatomical mapping to create the location of his electrograms. The primary endpoints were development of Junctional Rhythm (JR) or Complete Heart Block (CHB), and time from first RF lesion until rhythm change. Secondary endpoints included number of RF applications.
Results
Patients were randomized one-to-one to the MiFi arm or standard ablation arm. JR or CHB was achieved in all patients. Time from first RF lesion until JR/CHB was: (Median/IQR) 325 sec/250–1270 sec. vs 287 sec/101–406 sec. Number of RF applications was 5/3–15 applications vs 4.5/1–5 applications. Total procedure time in the lab was 134 min/73.5–172.5 min vs 58 min/52–146 min.
Microfidelity Technology vs Standard
Conclusion
Analysis suggests that the MiFi catheter is efficacious in ablating the AVJ, but requires greater RF duration and number of lesions, with wider case-by-case variability to achieve JR or CHB. Microfidelity technology and electroanatomical mapping did not result in faster time to completion than using fluoroscopic landmarks and His electrograms alone. Preoperative choice of sheath for catheter stability and contact may also play a role in a more efficient timely successful ablation of the AV node.
Acknowledgement/Funding
Boston Scientific
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Affiliation(s)
- J L Levine
- University of Florida, Jacksonville, United States of America
| | - K Xiang
- University of Florida, Jacksonville, United States of America
| | - J Su
- University of Florida, Jacksonville, United States of America
| | - S Hsu
- University of Florida, Jacksonville, United States of America
| | - R J Kim
- University of Florida, Jacksonville, United States of America
| | - S Elayi
- University of Florida, Jacksonville, United States of America
| | - J N Catanzaro
- University of Florida, Jacksonville, United States of America
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Liu H, You Z, Yang S, Liu C, Xie X, Xiang K, Wang X, Yan X. High-efficient adsorption and removal of elemental mercury from smelting flue gas by cobalt sulfide. Environ Sci Pollut Res Int 2019; 26:6735-6744. [PMID: 30632039 DOI: 10.1007/s11356-019-04159-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 09/19/2018] [Accepted: 01/03/2019] [Indexed: 06/09/2023]
Abstract
Nonferrous metal smelting produces a large amount of Hg0 in flue gas, which has caused serious damage to the environment and human health. In this work, amorphous cobalt sulfide was synthesized by a liquid-phase precipitation method and was used for capturing gaseous Hg0 from simulated smelting flue gas at low temperatures (50~150 °C). In the adsorption process, Hg0 can be transformed into the stable mercury compound, which is confirmed to be HgS by X-ray photoelectron spectroscopy (XPS) and temperature programmed desorption of Hg (Hg-TPD) analysis. Meanwhile, XPS results also demonstrate that S22- species on the surface of cobalt sulfide play an important role in Hg0 transformation. At the temperature of 50 °C (inlet Hg0 concentration of 214 μg·m-3), the Hg0 adsorption capacity of cobalt sulfide (penetration rate of 25%) is as high as 2.07 mg·g-1, which is much higher than that of popular adsorbents such as activated carbons and metal oxides. In addition, it was found that the Hg0 removal efficiency by cobalt sulfide in the flue gas with high concentration of SO2 (5%) remained more than 94%. The good adsorption and Hg0 removal performance guarantee cobalt sulfide the great superiority and application potential in the treatment of Hg0 in smelting flue gas with high concentration of SO2.
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Affiliation(s)
- Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Central South University , Changsha, 410083, China
| | - Zhiwen You
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Shu Yang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Cao Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Xiaofeng Xie
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Xiaoyang Wang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Xu Yan
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China.
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Central South University , Changsha, 410083, China.
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Liu H, Xiang K, Liu Y, Zhu F, Zou M, Yan X, Chai L. Polydopamine Functionalized Cu Nanowires for Enhanced CO
2
Electroreduction Towards Methane. ChemElectroChem 2018. [DOI: 10.1002/celc.201801132] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Hui Liu
- School of Metallurgy and EnvironmentCentral South University 932 South Lushan Rd Changsha, Hunan 410083 China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution 932 South Lushan Rd Changsha, Hunan 410083 China
| | - Kaisong Xiang
- School of Metallurgy and EnvironmentCentral South University 932 South Lushan Rd Changsha, Hunan 410083 China
| | - Yucheng Liu
- School of Metallurgy and EnvironmentCentral South University 932 South Lushan Rd Changsha, Hunan 410083 China
| | - Fangfang Zhu
- School of Metallurgy and EnvironmentCentral South University 932 South Lushan Rd Changsha, Hunan 410083 China
| | - Mi Zou
- School of Metallurgy and EnvironmentCentral South University 932 South Lushan Rd Changsha, Hunan 410083 China
| | - Xu Yan
- School of Metallurgy and EnvironmentCentral South University 932 South Lushan Rd Changsha, Hunan 410083 China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution 932 South Lushan Rd Changsha, Hunan 410083 China
| | - Liyuan Chai
- School of Metallurgy and EnvironmentCentral South University 932 South Lushan Rd Changsha, Hunan 410083 China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution 932 South Lushan Rd Changsha, Hunan 410083 China
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20
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Liu Z, Wang D, Peng B, Chai L, Liu H, Yang S, Yang B, Xiang K, Liu C. Transport and transformation of mercury during wet flue gas cleaning process of nonferrous metal smelting. Environ Sci Pollut Res Int 2017; 24:22494-22502. [PMID: 28803273 DOI: 10.1007/s11356-017-9852-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 03/15/2017] [Accepted: 07/31/2017] [Indexed: 06/07/2023]
Abstract
Reducing mercury emission is hot topic for international society. The first step for controlling mercury in fuel gas is to investigate mercury distribution and during the flue gas treatment process. The mercury transport and transformation in wet flue gas cleaning process of nonferrous smelting industry was studied in the paper with critical important parameters, such as the solution temperature, Hg0 concentration, SO2 concentration, and Hg2+ concentration at the laboratory scale. The mass ratio of the mercury distribution in the solution, flue gas, sludge, and acid fog from the simulated flue gas containing Hg2+ and Hg0 was 49.12~65.54, 18.34~35.42, 11.89~14.47, and 1.74~3.54%, respectively. The primary mercury species in the flue gas and acid fog were gaseous Hg0 and dissolved Hg2+. The mercury species in the cleaning solution were dissolved Hg2+ and colloidal mercury, which accounted for 56.56 and 7.34% of the total mercury, respectively. Various mercury compounds, including Hg2Cl2, HgS, HgCl2, HgSO4, and HgO, existed in the sludge. These results for mercury distribution and speciation are highly useful in understanding mercury transport and transformation during the wet flue gas cleaning process. This research is conducive for controlling mercury emissions from nonferrous smelting flue gas and by-products.
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Affiliation(s)
- Zhilou Liu
- School of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha, 410083, China
- School of Metallurgy and Chemical Engineering, JiangXi University of Science and Engineering, 86 Hongqi Road, Ganzhou, 341000, China
| | - Dongli Wang
- School of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha, 410083, China
| | - Bing Peng
- School of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha, 410083, China
- Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Liyuan Chai
- School of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha, 410083, China
- Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha, 410083, China.
- Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, China.
| | - Shu Yang
- School of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha, 410083, China
| | - Bentao Yang
- School of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha, 410083, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha, 410083, China
| | - Cao Liu
- School of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha, 410083, China
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21
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Liu H, Xiang K, Yang B, Xie X, Wang D, Zhang C, Liu Z, Yang S, Liu C, Zou J, Chai L. The electrochemical selective reduction of NO using CoSe 2@CNTs hybrid. Environ Sci Pollut Res Int 2017; 24:14249-14258. [PMID: 28421525 DOI: 10.1007/s11356-017-9006-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 02/04/2017] [Accepted: 04/07/2017] [Indexed: 06/07/2023]
Abstract
Converting the NO from gaseous pollutant into NH4+ through electrocatalytical reduction using cost-effective materials holds great promise for pollutant purifying and resources recycling. In this work, we developed a highly selective and stable catalyst CoSe2 nanoparticle hybridized with carbon nanotubes (CoSe2@CNTs). The CoSe2@CNTs hybrid catalysts performed an extraordinary high selectivity for NH4+ formation in NO electroreduction with minimal N2O production and H2 evolution. The specific spatial structure of CoSe2 is conductive to the predominant formation of N-H bond between the N from adsorbed NO and H and inhibition of N-N formation from adjacent adsorbed NO. It was also the first time to convert the coordinated NO into NH4+ using non-noble metal catalysis. Moreover, the original concept of employing CoSe2 as eletrocatalyst for NO hydrogenation presented in this work can broaden horizons and provide new dimensions in the design of new highly efficient catalysts for NH4+ synthesis in aqueous solution.
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Affiliation(s)
- Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 4100835, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Bentao Yang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Xiaofeng Xie
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Dongli Wang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Cong Zhang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Zhilou Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Shu Yang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Cao Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Jianping Zou
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, China
| | - Liyuan Chai
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China.
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 4100835, China.
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22
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Liu Z, Peng B, Chai L, Liu H, Yang S, Yang B, Xiang K, Liu C, Wang D. Selective Removal of Elemental Mercury from High-Concentration SO2 Flue Gas by Thiourea Solution and Investigation of Mechanism. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b00044] [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: 11/29/2022]
Affiliation(s)
- Zhilou Liu
- School
of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha 410083, China
| | - Bing Peng
- School
of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Liyuan Chai
- School
of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Hui Liu
- School
of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Shu Yang
- School
of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha 410083, China
| | - Bentao Yang
- School
of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha 410083, China
| | - Kaisong Xiang
- School
of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha 410083, China
| | - Cao Liu
- School
of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha 410083, China
| | - Dongli Wang
- School
of Metallurgy and Environment, Central South University, 932 South Lushan Road, Changsha 410083, China
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23
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Yang B, Chai L, Zhu F, Yan X, Xiang K, Liu Z, Zhang C, Liu H. Selenium-Assisted Reduction of Sulfur Dioxide by Carbon Monoxide in the Liquid Phase. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04718] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bentao Yang
- School
of Metallurgy and Environment, Central South University, Changsha, China
| | - Liyuan Chai
- School
of Metallurgy and Environment, Central South University, Changsha, China
- Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, Changsha, China
| | - Fangfang Zhu
- School
of Metallurgy and Environment, Central South University, Changsha, China
| | - Xu Yan
- School
of Metallurgy and Environment, Central South University, Changsha, China
- Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, Changsha, China
| | - Kaisong Xiang
- School
of Metallurgy and Environment, Central South University, Changsha, China
| | - Zhilou Liu
- School
of Metallurgy and Environment, Central South University, Changsha, China
| | - Cong Zhang
- School
of Metallurgy and Environment, Central South University, Changsha, China
| | - Hui Liu
- School
of Metallurgy and Environment, Central South University, Changsha, China
- Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, Changsha, China
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24
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Yang B, Chai L, Zhu F, Yan X, Xiang K, Liu H. Kinetics and Mechanism of Se-Catalyzed Disproportionation of Bisulfite: The Critical Role of Selenosulfate. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b04840] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bentao Yang
- School
of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Liyuan Chai
- School
of Metallurgy and Environment, Central South University, Changsha 410083, China
- Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Fangfang Zhu
- School
of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Xu Yan
- School
of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Kaisong Xiang
- School
of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Hui Liu
- School
of Metallurgy and Environment, Central South University, Changsha 410083, China
- Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
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25
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Xiang K, Liu H, Yang B, Zhang C, Yang S, Liu Z, Liu C, Xie X, Chai L, Min X. Selenium catalyzed Fe(III)-EDTA reduction by Na2SO3: a reaction-controlled phase transfer catalysis. Environ Sci Pollut Res Int 2016; 23:8113-8119. [PMID: 26888642 DOI: 10.1007/s11356-016-6267-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 09/29/2015] [Accepted: 02/08/2016] [Indexed: 06/05/2023]
Abstract
Fe(II)-EDTA, a typical chelated iron, is able to coordinate with nitric oxide (NO) which accelerates the rates and kinetics of the absorption of flue gas. However, Fe(II)-EDTA can be easily oxidized to Fe(III)-EDTA which is unable to absorb NO. Therefore, the regeneration of fresh Fe(II)-EDTA, which actually is the reduction of Fe(III)-EDTA to Fe(II)-EDTA, becomes a crucial step in the denitrification process. To enhance the reduction rate of Fe(III)-EDTA, selenium was introduced into the SO3 (2-)/Fe(III)-EDTA system as catalyst for the first time. By comparison, the reduction rate was enhanced by four times after adding selenium even at room temperature (25 °C). Encouragingly, elemental Se could precipitate out when SO3 (2-) was consumed up by oxidation to achieve self-separation. A catalysis mechanism was proposed with the aid of ultraviolet-visible (UV-Vis) spectroscopy, Tyndall scattering, horizontal attenuated total reflection Fourier transform infrared (HATR-FTIR) spectroscopy, and X-ray diffraction (XRD). In the catalysis process, the interconversion between SeSO3 (2-) and nascent Se formed a catalysis circle for Fe(III)-EDTA reduction in SO3 (2-) circumstance.
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Affiliation(s)
- Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China.
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China.
| | - Bentao Yang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Cong Zhang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Shu Yang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Zhilou Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Cao Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Xiaofeng Xie
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Liyuan Chai
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Xiaobo Min
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China.
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China.
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26
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Ravnsbæk DB, Xiang K, Xing W, Borkiewicz OJ, Wiaderek KM, Gionet P, Chapman KW, Chupas PJ, Chiang YM. Extended solid solutions and coherent transformations in nanoscale olivine cathodes. Nano Lett 2014; 14:1484-1491. [PMID: 24548146 DOI: 10.1021/nl404679t] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanoparticle LiFePO4, the basis for an entire class of high power Li-ion batteries, has recently been shown to exist in binary lithiated/delithiated states at intermediate states of charge. The Mn-bearing version, LiMn(y)Fe(1-y)PO4, exhibits even higher rate capability as a lithium battery cathode than LiFePO4 of comparable particle size. To gain insight into the cause(s) of this desirable performance, the electrochemically driven phase transformation during battery charge and discharge of nanoscale LiMn0.4Fe0.6PO4 of three different average particle sizes, 52, 106, and 152 nm, is investigated by operando synchrotron radiation powder X-ray diffraction. In stark contrast to the binary lithiation states of pure LiFePO4 revealed in recent investigations, the formations of metastable solid solutions covering a remarkable wide compositional range, including while in two-phase coexistence, are observed. Detailed analysis correlates this behavior with small elastic misfits between phases compared to either pure LiFePO4 or LiMnPO4. On the basis of time- and state-of-charge dependence of the olivine structure parameters, we propose a coherent transformation mechanism. These findings illustrate a second, completely different phase transformation mode for pure well-ordered nanoscale olivines compared to the well-studied case of LiFePO4.
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Affiliation(s)
- D B Ravnsbæk
- Department of Material Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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27
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Wang T, Zhang L, Wang H, Yang W, Fu Y, Zhou W, Yu W, Xiang K, Su Z, Dai S, Chai L. Controllable synthesis of hierarchical porous Fe3O4 particles mediated by poly(diallyldimethylammonium chloride) and their application in arsenic removal. ACS Appl Mater Interfaces 2013; 5:12449-59. [PMID: 24251780 DOI: 10.1021/am403533v] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Hierarchical porous Fe3O4 particles with tunable grain size were synthesized based on a facile poly (diallyldimethylammonium chloride) (PDDA)-modulated solvothermal method. The products were characterized with scanning electron microscopy (SEM) and transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), N2 adsorption-desorption technique, vibrating sample magnetometer (VSM), and dynamic light scattering (DLS). The results show that increasing the PDDA dosage decrease the grain size and particle size, which increased the particle porosity and enhanced the surface area from 7.05 to 32.75 m(2) g(-1). Possible mechanism can be ascribed to the PDDA function on capping the crystal surface and promoting the viscosity of reaction medium to mediate the growth and assembly of grain. Furthermore, the arsenic adsorption application of the as-obtained Fe3O4 samples was investigated and the adsorption mechanism was proposed. High magnetic Fe3O4 particles with increased surface area display improved arsenic adsorption performance, superior efficiency in low-level arsenic removal, high desorption efficiency, and satisfactory magnetic recyclability, which are very promising compared with commercial Fe3O4 particles.
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Affiliation(s)
- Ting Wang
- Department of Environmental Engineering, School of Metallurgy and Environment, Central South University , Changsha 410017, P. R. China
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Yu W, Zhang F, Hu W, Zhang R, Wang C, Lu J, Jiang F, Tang S, Peng D, Chen M, Bao Y, Xiang K, Hu C, Jia W. Association between KCNQ1 genetic variants and QT interval in a Chinese population. Diabet Med 2013; 30:1225-9. [PMID: 23692438 DOI: 10.1111/dme.12237] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 04/12/2013] [Accepted: 05/15/2013] [Indexed: 12/14/2022]
Abstract
AIM There is a close link between electrocardiographic ventricular repolarization QT parameters and Type 2 diabetes. The aim of the present study was to assess the effects of QT-related and diabetes-related variants in KCNQ1 on QT interval in a Chinese population. METHODS We recruited 2415 patients with Type 2 diabetes and 1163 subjects with normal glucose regulation in the present study. QT interval was obtained and the heart rate-corrected QT interval (QTc) was calculated using Bazett's formula. Four single nucleotide polymorphisms in KCNQ1 were selected (rs12296050, rs12576239, rs2237892 and rs2237895) and genotyped. RESULTS In participants with normal glucose regulation, the minor allele T of rs12296050 was associated with a 3.46-ms QTc prolongation under an additive model (P = 0.0109, empirical P = 0.0498). In patients with Type 2 diabetes, we did not find any association for the single nucleotide polymorphisms. CONCLUSIONS Our findings indicate that KCNQ1 is associated with QT interval in a Chinese population with normal glucose regulation.
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Affiliation(s)
- W Yu
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai, China
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29
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Ma RCW, Hu C, Tam CH, Zhang R, Kwan P, Leung TF, Thomas GN, Go MJ, Hara K, Sim X, Ho JSK, Wang C, Li H, Lu L, Wang Y, Li JW, Wang Y, Lam VKL, Wang J, Yu W, Kim YJ, Ng DP, Fujita H, Panoutsopoulou K, Day-Williams AG, Lee HM, Ng ACW, Fang YJ, Kong APS, Jiang F, Ma X, Hou X, Tang S, Lu J, Yamauchi T, Tsui SKW, Woo J, Leung PC, Zhang X, Tang NLS, Sy HY, Liu J, Wong TY, Lee JY, Maeda S, Xu G, Cherny SS, Chan TF, Ng MCY, Xiang K, Morris AP, Keildson S, Hu R, Ji L, Lin X, Cho YS, Kadowaki T, Tai ES, Zeggini E, McCarthy MI, Hon KL, Baum L, Tomlinson B, So WY, Bao Y, Chan JCN, Jia W. Genome-wide association study in a Chinese population identifies a susceptibility locus for type 2 diabetes at 7q32 near PAX4. Diabetologia 2013; 56:1291-305. [PMID: 23532257 PMCID: PMC3648687 DOI: 10.1007/s00125-013-2874-4] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2012] [Accepted: 01/31/2013] [Indexed: 12/18/2022]
Abstract
AIMS/HYPOTHESIS Most genetic variants identified for type 2 diabetes have been discovered in European populations. We performed genome-wide association studies (GWAS) in a Chinese population with the aim of identifying novel variants for type 2 diabetes in Asians. METHODS We performed a meta-analysis of three GWAS comprising 684 patients with type 2 diabetes and 955 controls of Southern Han Chinese descent. We followed up the top signals in two independent Southern Han Chinese cohorts (totalling 10,383 cases and 6,974 controls), and performed in silico replication in multiple populations. RESULTS We identified CDKN2A/B and four novel type 2 diabetes association signals with p < 1 × 10(-5) from the meta-analysis. Thirteen variants within these four loci were followed up in two independent Chinese cohorts, and rs10229583 at 7q32 was found to be associated with type 2 diabetes in a combined analysis of 11,067 cases and 7,929 controls (p meta = 2.6 × 10(-8); OR [95% CI] 1.18 [1.11, 1.25]). In silico replication revealed consistent associations across multiethnic groups, including five East Asian populations (p meta = 2.3 × 10(-10)) and a population of European descent (p = 8.6 × 10(-3)). The rs10229583 risk variant was associated with elevated fasting plasma glucose, impaired beta cell function in controls, and an earlier age at diagnosis for the cases. The novel variant lies within an islet-selective cluster of open regulatory elements. There was significant heterogeneity of effect between Han Chinese and individuals of European descent, Malaysians and Indians. CONCLUSIONS/INTERPRETATION Our study identifies rs10229583 near PAX4 as a novel locus for type 2 diabetes in Chinese and other populations and provides new insights into the pathogenesis of type 2 diabetes.
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Affiliation(s)
- R. C. W. Ma
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
- Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong, SAR People’s Republic of China
- Li Ka Shing Institute of Life Sciences, Chinese University of Hong Kong, Hong Kong, SAR People’s Republic of China
| | - C. Hu
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
- Shanghai Jiao Tong University Affiliated Sixth People’s Hospital South Campus, Shanghai, People’s Republic of China
| | - C. H. Tam
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - R. Zhang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
| | - P. Kwan
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - T. F. Leung
- Department of Paediatrics, Chinese University of Hong Kong, Hong Kong, People’s Republic of China
| | - G. N. Thomas
- Department of Public Health, Epidemiology and Biostatistics, University of Birmingham, Birmingham, UK
| | - M. J. Go
- Center for Genome Science, National Institute of Health, Osong Health Technology Administration Complex, Gangoe-myeon, Yeonje-ri, Cheongwon-gun, Chungcheongbuk-do Republic of Korea
| | - K. Hara
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
- Department of Integrated Molecular Science on Metabolic Diseases, University of Tokyo Hospital, Tokyo, Japan
| | - X. Sim
- Centre for Molecular Epidemiology, Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Republic of Singapore
- Center for Statistical Genetics and Department of Biostatistics, University of Michigan, Ann Arbor, MI USA
| | - J. S. K. Ho
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - C. Wang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
| | - H. Li
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences and Graduate School of the Chinese Academy of Sciences, Shanghai, People’s Republic of China
| | - L. Lu
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences and Graduate School of the Chinese Academy of Sciences, Shanghai, People’s Republic of China
| | - Y. Wang
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences and Graduate School of the Chinese Academy of Sciences, Shanghai, People’s Republic of China
| | - J. W. Li
- School of Life Sciences, Chinese University of Hong Kong, Hong Kong, SAR People’s Republic of China
| | - Y. Wang
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - V. K. L. Lam
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - J. Wang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
| | - W. Yu
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
| | - Y. J. Kim
- Center for Genome Science, National Institute of Health, Osong Health Technology Administration Complex, Gangoe-myeon, Yeonje-ri, Cheongwon-gun, Chungcheongbuk-do Republic of Korea
| | - D. P. Ng
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Republic of Singapore
| | - H. Fujita
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - K. Panoutsopoulou
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, UK
| | - A. G. Day-Williams
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, UK
| | - H. M. Lee
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - A. C. W. Ng
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - Y-J. Fang
- Department of Colorectal Surgery, State Key Laboratory of Oncology in South China, Sun Yat-sen University Cancer Center, Guangzhou, People’s Republic of China
| | - A. P. S. Kong
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - F. Jiang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
| | - X. Ma
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
| | - X. Hou
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
| | - S. Tang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
| | - J. Lu
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
| | - T. Yamauchi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - S. K. W. Tsui
- School of Biomedical Sciences, Chinese University of Hong Kong, Hong Kong, SAR People’s Republic of China
| | - J. Woo
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - P. C. Leung
- Department of Orthopaedics, Chinese University of Hong Kong, Hong Kong, SAR People’s Republic of China
| | - X. Zhang
- Shanghai Jiao Tong University Affiliated Sixth People’s Hospital South Campus, Shanghai, People’s Republic of China
| | - N. L. S. Tang
- Department of Chemical Pathology, Chinese University of Hong Kong, Hong Kong, SAR People’s Republic of China
| | - H. Y. Sy
- Department of Paediatrics, Chinese University of Hong Kong, Hong Kong, People’s Republic of China
| | - J. Liu
- Genome Institute of Singapore, Agency for Science, Technology and Research, Singapore, Republic of Singapore
| | - T. Y. Wong
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Republic of Singapore
- Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Republic of Singapore
- Centre for Eye Research Australia, University of Melbourne, East Melbourne, VIC Australia
| | - J. Y. Lee
- Center for Genome Science, National Institute of Health, Osong Health Technology Administration Complex, Gangoe-myeon, Yeonje-ri, Cheongwon-gun, Chungcheongbuk-do Republic of Korea
| | - S. Maeda
- Laboratory for Endocrinology and Metabolism, RIKEN Center for Genomic Medicine, Yokohama, Japan
| | - G. Xu
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - S. S. Cherny
- Department of Psychiatry and State Key Laboratory of Brain and Cognitive Sciences, University of Hong Kong, Hong Kong, SAR People’s Republic of China
| | - T. F. Chan
- School of Life Sciences, Chinese University of Hong Kong, Hong Kong, SAR People’s Republic of China
| | - M. C. Y. Ng
- Center for Genomics and Personalized Medicine Research, Center for Diabetes Research, Wake Forest School of Medicine, Winston-Salem, NC USA
| | - K. Xiang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
| | - A. P. Morris
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
| | | | - S. Keildson
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
| | | | - R. Hu
- Institute of Endocrinology and Diabetology, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People’s Republic of China
| | - L. Ji
- Department of Endocrinology and Metabolism, Peking University People’s Hospital, Beijing, People’s Republic of China
| | - X. Lin
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences and Graduate School of the Chinese Academy of Sciences, Shanghai, People’s Republic of China
| | - Y. S. Cho
- Department of Biomedical Science, Hallym University, Chuncheon, Gangwon-do Republic of Korea
| | - T. Kadowaki
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - E. S. Tai
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Republic of Singapore
- Graduate Medical School, Duke-National University of Singapore, Singapore, Republic of Singapore
| | - E. Zeggini
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, UK
| | - M. I. McCarthy
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
- Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Churchill Hospital, Oxford, UK
| | - K. L. Hon
- Department of Paediatrics, Chinese University of Hong Kong, Hong Kong, People’s Republic of China
| | - L. Baum
- School of Pharmacy, Chinese University of Hong Kong, Hong Kong, SAR People’s Republic of China
| | - B. Tomlinson
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - W. Y. So
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
| | - Y. Bao
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
| | - J. C. N. Chan
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR People’s Republic of China
- Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong, SAR People’s Republic of China
- Li Ka Shing Institute of Life Sciences, Chinese University of Hong Kong, Hong Kong, SAR People’s Republic of China
| | - W. Jia
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai, 200233 People’s Republic of China
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Zhang R, Jiang F, Hu C, Yu W, Wang J, Wang C, Ma X, Tang S, Bao Y, Xiang K, Jia W. Genetic variants of LPIN1 indicate an association with Type 2 diabetes mellitus in a Chinese population. Diabet Med 2013; 30:118-22. [PMID: 22853689 DOI: 10.1111/j.1464-5491.2012.03758.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS Metabolic disorders are independent risk factors for the development of Type 2 diabetes. The aim of the study is to test the association of LPIN1 variants with Type 2 diabetes and clinical characteristics in large samples of the Chinese population. METHODS In the first stage, 15 single nucleotide polymorphisms within the LPIN1 region were selected and genotyped in 3700 Chinese Han participants. In the second stage, the single nucleotide polymorphisms showing significant association or trends towards association were genotyped in an additional 3122 samples for replication. Meta-analyses and genotype-phenotype association studies were performed after combining the data from the two stages. RESULTS In the first stage, we detected that rs16857876 was significantly associated with Type 2 diabetes with an odds ratio of 0.806 (95% CI 0.677-0.958, P = 0.015), while rs11695610 showed a trend with Type 2 diabetes (odds ratio 0.846, 95% CI 0.709-1.009, P = 0.062). In the second stage, a similar effect of rs11695610 on Type 2 diabetes was observed (odds ratio 0.849, 95% CI 0.700-1.030, P = 0.096). The meta-analyses combining the information from the two stages showed a significant effect of rs11695610 on Type 2 diabetes with an odds ratio of 0.847 (95% CI 0.744-0.965, P = 0.012). Finally, the phenotype-genotype association analyses showed that rs11695610 was associated with 2-h plasma glucose (P = 0.040) and triglyceride levels (P = 0.034). CONCLUSIONS Our data implied that common single nucleotide polymorphisms within the LPIN1 region were associated with Type 2 diabetes and metabolic traits in the Chinese population.
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Affiliation(s)
- R Zhang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Fang Q, Chen S, Wang Y, Jiang S, Zhang R, Hu C, Wang C, Liu F, Xiang K, Jia W. Functional analyses of the mutation nt-128 T→G in the hepatocyte nuclear factor-1α promoter region in Chinese diabetes pedigrees. Diabet Med 2012; 29:1456-64. [PMID: 22413961 PMCID: PMC3570122 DOI: 10.1111/j.1464-5491.2012.03626.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS Hepatocyte nuclear factor-1α (HNF-1α) regulates the expression of genes encoding proteins involved in glucose metabolism and insulin secretion. Mutations in the HNF-1α gene cause maturity-onset diabetes of the young Type 3. However, the mechanism leading to this disease has not been completely ascertained. Previously, we found a novel mutation in the regulatory element of the human HNF-1α gene in two Chinese diabetes pedigrees. The nucleotide at position -128 T was substituted by G (nt-128 T→G). In this study, we analysed the functional defect of nt-128 T→G in HNF-1α transcription activity. METHODS Luciferase reporter gene assays were carried out to examine the functional characteristics of this mutant. Electrophoretic mobility shift assays and chromatin immunoprecipitation were performed to confirm the binding of nuclear proteins to oligonucleotides. RESULTS The variant construct (nt-128 T→G) had a 1.65-fold increase in promoter activity compared with that of the wild-type construct in HepG2 cells and a 1.33-fold increase in MIN6 cells, respectively. The variant resided at a FOXA/HNF-3 binding site identified by a series of competitive electrophoretic mobility shift assays and antibody supershift analyses. The assays showed a differential binding affinity in the wild-type and the nt-128 T→G mutant fragments by FOXA/HNF-3. Chromatin immunoprecipitation indicated that FOXA/HNF-3 bound to this region in vivo. One nucleotide substitution in the FOXA/HNF-3 site in the human HNF-1α regulatory element caused an increase of HNF-1α transcriptional activity. CONCLUSIONS Our data suggested that this substitution in the promoter region affects DNA-protein interaction and HNF-1α gene transcription. The mutant may contribute to the development of diabetes in these two nt-128 T→G pedigrees of Chinese.
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Affiliation(s)
- Q Fang
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Yu W, Ma RC, Hu C, So WY, Zhang R, Wang C, Tam CH, Ho JS, Lu J, Jiang F, Tang S, Ng MC, Bao Y, Xiang K, Jia W, Chan JCN. Association between KCNQ1 genetic variants and obesity in Chinese patients with type 2 diabetes. Diabetologia 2012; 55:2655-2659. [PMID: 22790062 DOI: 10.1007/s00125-012-2636-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 06/08/2012] [Indexed: 01/24/2023]
Abstract
AIMS/HYPOTHESIS There is evidence of overlap between susceptibility loci for type 2 diabetes and obesity. The aim of this study is to explore the association between the established type 2 diabetes locus KCNQ1 and obesity in Han Chinese. METHODS We recruited 6,667 and 6,606 diabetic case-control samples from Shanghai and Hong Kong, respectively. Of the samples, 7.5% and 6.3% were excluded because of genotyping failure or data missing in the association analyses of rs2237892 and rs2237895 with obesity/BMI, respectively. RESULTS We found that rs2237892 was associated with lower BMI and lower incidence of overweight/obesity in diabetic patients from Hong Kong (BMI, β = -0.0060 per diabetes risk C allele for log(10)BMI [95% CI -0.0088, -0.0032; p = 2.83 × 10(-5)]; overweight/obesity, OR 0.880 for C allele [95% CI 0.807, 0.960; p = 0.004]) and in the meta-analysis of cases from the two regions (BMI, combined β = -0.0048 per C allele for log(10)BMI [95% CI -0.0070, -0.0026; p = 2.20 × 10(-5)]; overweight/obesity, combined OR 0.890 for C allele [95% CI 0.830, 0.955; p = 0.001]). rs2237895 was also related to decreased BMI (combined β = -0.0042 per diabetes risk C allele for log(10)BMI [95% CI -0.0062, -0.0022; p = 4.30 × 10(-5)]). A significant association with waist circumference was detected for rs2237892 in the pooled analyses (β = -0.0026 per C allele for log(10)[waist circumference] [95% CI -0.0045, -0.0007; p = 0.007]). However, neither an association with the risk of being overweight or obese nor associations with quantitive traits were detected for rs2237892 or rs2237895 in controls. CONCLUSION Our findings indicate that KCNQ1 is associated with obesity in Chinese patients with type 2 diabetes.
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Affiliation(s)
- W Yu
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China
| | - R C Ma
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, People's Republic of China
| | - C Hu
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China
| | - W Y So
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, People's Republic of China
| | - R Zhang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China
| | - C Wang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China
| | - C H Tam
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, People's Republic of China
| | - J S Ho
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, People's Republic of China
| | - J Lu
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China
| | - F Jiang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China
| | - S Tang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China
| | - M C Ng
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, People's Republic of China
- Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Y Bao
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China
| | - K Xiang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China
| | - W Jia
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Center for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China.
| | - J C N Chan
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, People's Republic of China.
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Allam R, Galal W, El-Damnhoury H, Mortada A, Guo R, Fang F, Xie JM, Zhang Q, Chan YS, Fung WH, Razali O, Azlan H, Lam KH, Chan CK, Yu CM, Wong FMF, Sit JWH, Wong EML, Lee V, Hemingway H, Harb R, Crake T, Lambiase P, Zhao QY, Yu SB, Huang H, Qin M, Cui HY, Huang T, Huang CX, Leung YW, Yue CS, Leung KF, Fung CYR, Mak YMW, Chow KS, Tang SK, Sperzel J, Tscheliessnigg K, Bucx JJJ, Silvestre J, Oza AL, Yu Mironov N, Golitsyn SP, Sokolov SF, Yuricheva YA, Maikov EB, Shlevkov NB, Mareev YV, Rosenstraukh LV, Chazov EI, Li BN, Qin J, Xiang K, Pang WM, Wang LS, Wu HS, Qin J, Wong TT, Yu CM, Heng PA, Clatot J, Ziyadeh-Isleem A, Coulombe A, Maugenre S, Dilanian G, Hatem S, Denjoy I, Neyroud N, Guicheney P, Plameras GB, Valentin MV, Ramirez M, Suga C, Hirahara T, Sugawara Y, Nakajima J, Wakaba H, Ako J, Momomura S, Ye Volkov D, Karpenko YI, Lopin DA, Chair SY, Lee JCK, Choi KC, Sit JWH, Wong EM, Chan CWH, So WKW, Cheng AHY, Hamid AK, Lainchbury JG, Troughton RW, Yandle TG, Frampton CM, Richards AM. P001 * Reversal of endothelial dysfunction after AF cardioversion. Eur Heart J Suppl 2012. [DOI: 10.1093/eurheartj/sur022] [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: 11/14/2022]
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Li D, Hou X, Ma X, Zong W, Shao X, Lu H, Xiang K, Jia W. Increment of 30-min post-challenge plasma glucose is associated with urine albumin excretion in men with normal glucose regulation. Diabet Med 2011; 28:1323-9. [PMID: 21658124 DOI: 10.1111/j.1464-5491.2011.03350.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS The overwhelming majority of subjects with normal glucose regulation have the highest plasma glucose concentration at 30 minutes during oral glucose tolerance. We aimed to examine the association between increment of 30-min post-challenge glucose and albuminuria in participants with normal glucose regulation. METHODS A population-based cross-sectional study was conducted in six communities in Shanghai between 2007 and 2008. A total of 3508 subjects with normal glucose regulation had complete data and were enrolled into the analysis. Among the selected subjects, only 1525 individuals (581 men, 944 women) were examined for their serum insulin levels. We assessed post-challenge blood glucose and insulin at 0, 30 and 120 min, urinary albumin and creatinine. The 30-min post-challenge glucose increment (Δ) was calculated as 30-min post-challenge glucose minus fasting plasma glucose, and albumin/creatinine ratio was used to reflect urinary albumin excretion. RESULTS Multivariable logistic regression analysis revealed that the Δ30-min post-challenge glucose was independently associated with increased albumin/creatinine ratio in men with normal glucose regulation (OR = 1.08, P = 0.025), but not in women. Furthermore, multivariable linear regression analysis revealed that early-phase glucose disposition index was the main factor responsible for Δ30-min post-challenge glucose and explained 14-20% of the variance of Δ30-min post-challenge glucose in the two subgroups (P < 0.05). Notably, men had higher Δ30-min post-challenge glucose and lower early-phase glucose disposition index than women (all P < 0.001). CONCLUSIONS The 30-min post-challenge plasma glucose increment is associated with urine albumin excretion in men with normal glucose regulation.
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Affiliation(s)
- D Li
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Yu W, Hu C, Zhang R, Wang C, Qin W, Lu J, Jiang F, Tang S, Bao Y, Xiang K, Jia W. Effects of KCNQ1 polymorphisms on the therapeutic efficacy of oral antidiabetic drugs in Chinese patients with type 2 diabetes. Clin Pharmacol Ther 2011; 89:437-42. [PMID: 21289621 DOI: 10.1038/clpt.2010.351] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The aim of this study was to explore the impact of KCNQ1 variants on the responses to oral antidiabetic drugs in a Chinese study population. A 48-week randomized pharmacogenetics study compared the effects of repaglinide and rosiglitazone in 209 newly diagnosed patients with type 2 diabetes. In the repaglinide cohort, individuals who were rs2237892 TT homozygotes exhibited lower 2-h glucose levels and significantly higher cumulative attainment rates of target 2-h glucose levels (P(log-rank) = 0.0383) than the C allele carriers; patients with a greater number of rs2237892 C alleles showed larger augmentations in both fasting insulin and homeostasis model assessment of insulin resistance (HOMA-IR) (P = 0.0166 and 0.0026, respectively); moreover, the rs2237895 C allele was also associated with greater increments in both fasting insulin and HOMA-IR (P = 0.0274 and 0.0259, respectively). In contrast, only an association between rs2237897 and decrease in 2-h glucose levels was detected in the rosiglitazone cohort (P = 0.0321). Our results indicated that KCNQ1 polymorphisms are associated with repaglinide efficacy, and might also be associated with rosiglitazone response, in Chinese patients with type 2 diabetes.
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Affiliation(s)
- W Yu
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, People's Republic of China
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Abstract
AIMS Electrocardiographic ventricular repolarization QT parameters are independent risk factors for cardiovascular events and sudden cardiac death in diabetic patients. The aim of the study was to investigate the association of polymorphisms of the nitric oxide synthase 1 adaptor protein (NOS1AP) gene with QT interval in Chinese subjects with or without Type 2 diabetes. METHODS Three single nucleotide polymorphisms (SNPs) (rs10494366, rs12143842 and rs12029454) were genotyped in 1240 Type 2 diabetic patients (631 men and 609 women) and 1196 normal controls (433 men and 763 women). Individuals with overt diseases other than diabetes were excluded. Heart-rate corrected QT interval (QTc) was determined by standard 12-lead ECG and Bazett formula. Sex-pooled analysis and sex-specific analysis for genotype-phenotype association were both conducted. RESULTS In the diabetic group, the rs12143842 T allele was associated with a 3.87-ms (P = 0.014, empirical P = 0.039) increase in QTc duration for each additional allele copy, while rs10494366 and rs12029454 exhibited no significant association with QTc. We found no evidence of association for the three SNPs in subjects with normal glucose regulation. No significant SNP-gender and -diabetes affection interaction was observed. CONCLUSIONS The genetic variant rs12143842 in NOS1AP is associated with QT interval duration in a Chinese population with Type 2 diabetes. Future studies in different populations are needed to validate this finding and to evaluate the impact of NOS1AP variants on cardiovascular events and sudden cardiac death in diabetic patients.
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Affiliation(s)
- J Lu
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Clinical Center of Diabetes, Shanghai, China
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Hu C, Wang C, Zhang R, Ng MC, Bao Y, Wang C, So WY, Ma RC, Ma X, Chan JC, Xiang K, Jia W. Association of genetic variants of NOS1AP with type 2 diabetes in a Chinese population. Diabetologia 2010; 53:290-8. [PMID: 19937226 DOI: 10.1007/s00125-009-1594-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Accepted: 10/20/2009] [Indexed: 10/20/2022]
Abstract
AIMS/HYPOTHESIS Chromosome 1q21-q24 has been shown to be linked to type 2 diabetes. The International Type 2 Diabetes 1q Consortium showed that one of the nominal associations was located in the NOS1AP gene. Although this association was not replicated in additional samples of European descent, it remains unknown whether NOS1AP plays a role in Chinese individuals. METHODS In stage 1 analyses, 79 single nucleotide polymorphisms (SNPs) of the NOS1AP gene were successfully genotyped in a group of Shanghai Chinese individuals, comprising 1,691 type 2 diabetes patients and 1,720 control participants. In stage 2 analyses, the SNP showing the strongest association was genotyped in additional Chinese individuals, including 1,663 type 2 diabetes patients and 1,408 control participants. RESULTS In stage 1 analyses, 20 SNPs were nominally associated with type 2 diabetes (p < 0.05), with SNP rs12742393 showing the strongest association (OR 1.24 [95% CI 1.11-1.38]; p = 0.0002, empirical p = 0.019). Haplotype analysis also confirmed the association between rs12742393 and type 2 diabetes. In stage 2 analyses, the difference in allele frequency distribution of rs12742393 did not reach statistical significance (p = 0.254). However, the meta-analysis showed a significant association between rs12742393 and type 2 diabetes with an OR of 1.17 (95% CI 1.07-1.26; p = 0.0005). CONCLUSIONS/INTERPRETATION Our data suggest that NOS1AP variants may not play a dominant role in susceptibility to type 2 diabetes, but a minor effect cannot be excluded.
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Affiliation(s)
- C Hu
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, People's Republic of China
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Hu C, Wang C, Zhang R, Ma X, Wang J, Lu J, Qin W, Bao Y, Xiang K, Jia W. Variations in KCNQ1 are associated with type 2 diabetes and beta cell function in a Chinese population. Diabetologia 2009; 52:1322-5. [PMID: 19308350 DOI: 10.1007/s00125-009-1335-6] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Accepted: 03/02/2009] [Indexed: 01/27/2023]
Abstract
AIMS/HYPOTHESIS Recent genome-wide association studies in East Asian populations reported that single nucleotide polymorphisms (SNPs) in KCNQ1 are associated with type 2 diabetes. The aim of this study was to validate this finding in a Chinese population. METHODS We genotyped four SNPs, rs2074196, rs2237892, rs2237895 and rs2237897, in a group of 3,503 Shanghai Chinese individuals, comprising 1,769 type 2 diabetic patients and 1,734 normoglycaemic controls. Both the cases and the controls were extensively phenotyped for anthropometric and biochemical traits related to glucose metabolism. Arginine stimulation tests under fasting conditions were performed in a subgroup of 466 cases. RESULTS All four of the SNPs were associated with type 2 diabetes, with rs2237892 showing strongest evidence for association (OR 1.532, 95% CI 1.381-1.698, p = 5.0 x 10(-16)). The SNP rs2237897 was associated with both acute insulin and C-peptide response after arginine stimulation in a subgroup of cases (p = 0.0471 and p = 0.0156, respectively). The SNP rs2237895 was associated with both first- and second-phase insulin secretion in the controls (p = 0.0334 and p = 0.0002, respectively). CONCLUSIONS/INTERPRETATION In this study we found that KCNQ1 was associated with type 2 diabetes susceptibility in a Chinese population, possibly through its effect on beta cell function.
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Affiliation(s)
- C Hu
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, People's Republic of China
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Hu C, Zhang R, Wang C, Ma X, Wang C, Fang Q, Bao Y, Xiang K, Jia W. A genetic variant of G6PC2 is associated with type 2 diabetes and fasting plasma glucose level in the Chinese population. Diabetologia 2009; 52:451-6. [PMID: 19082990 DOI: 10.1007/s00125-008-1241-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Accepted: 11/20/2008] [Indexed: 01/05/2023]
Abstract
AIMS/HYPOTHESIS Single nucleotide polymorphisms (SNPs) in G6PC2 have been reported to be associated with fasting plasma glucose level in several populations of European descent. However, whether G6PC2 variants have a similar effect in other ethnic groups is unknown. The aim of this study was to investigate the effect of common variants of G6PC2 on type 2 diabetes and related clinical features in a Chinese population. METHODS We selected four SNPs, rs13387347, rs2232316, rs492594 and rs16856187, tagging all the common variants spanning the G6PC2 gene (r(2) >or= 0.8) based on HapMap Chinese data, and genotyped them in a group of 3,676 Shanghai Chinese individuals, comprising 1,876 cases and 1,800 controls. RESULTS Three SNPs were nominally associated with type 2 diabetes, with rs16856187 showing the strongest evidence for association (p = 0.0009, empirical p = 0.0047). Further conditional analysis revealed that the association signal arose from an individual SNP, rs16856187. This SNP was also associated with fasting plasma glucose level in participants with normal glucose regulation (p = 0.0002), with the fasting plasma glucose level observed to increase by 0.067 mmol/l with each copy of the rare C allele. CONCLUSIONS/INTERPRETATION In this study we identified a novel risk-conferring G6PC2 SNP for type 2 diabetes in a Chinese population and confirmed the previous finding that G6PC2 variants are associated with fasting plasma glucose concentration.
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Affiliation(s)
- C Hu
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China
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Xiang K, Tietz EI. Chronic benzodiazepine-induced reduction in GABA(A) receptor-mediated synaptic currents in hippocampal CA1 pyramidal neurons prevented by prior nimodipine injection. Neuroscience 2008; 157:153-63. [PMID: 18805463 DOI: 10.1016/j.neuroscience.2008.08.049] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [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] [Received: 07/21/2008] [Revised: 08/21/2008] [Accepted: 08/23/2008] [Indexed: 01/13/2023]
Abstract
One week oral flurazepam (FZP) administration in rats results in reduced GABA(A) receptor-mediated synaptic transmission in CA1 pyramidal neurons associated with benzodiazepine tolerance in vivo and in vitro. Since voltage-gated calcium channel (VGCC) current density is enhanced twofold during chronic FZP treatment, the role of L-type VGCCs in regulating benzodiazepine-induced changes in CA1 neuron GABA(A) receptor-mediated function was evaluated. Nimodipine (10 mg/kg, i.p.) or vehicle (0.5% Tween 80, 2 ml/kg) was injected 1 day after ending FZP treatment and 24 h prior to hippocampal slice preparation for measurement of mIPSC characteristics and in vitro tolerance to zolpidem. The reduction in GABA(A) receptor-mediated mIPSC amplitude and estimated unitary channel conductance measured 2 days after drug removal was no longer observed following prior nimodipine injection. However, the single nimodipine injection failed to prevent in vitro tolerance to zolpidem's ability to prolong mIPSC decay in FZP-treated neurons, suggesting multiple mechanisms may be involved in regulating GABA(A) receptor-mediated synaptic transmission following chronic FZP administration. As reported previously in recombinant receptors, nimodipine inhibited synaptic GABA(A) receptor currents only at high concentrations (>30 muM), significantly greater than attained in vivo (1 muM) 45 min after a single antagonist injection. Thus, the effects of nimodipine were unlikely to be related to direct effects on GABA(A) receptors. As with nimodipine injection, buffering intracellular free [Ca(2+)] with BAPTA similarly prevented the effects on GABA(A) receptor-mediated synaptic transmission, suggesting intracellular Ca(2+) homeostasis is important to maintain GABA(A) receptor function. The findings further support a role for activation of L-type VGCCs, and perhaps other Ca(2+)-mediated signaling pathways, in the modulation of GABA(A) receptor synaptic function following chronic benzodiazepine administration, independent of modulation of the allosteric interactions between benzodiazepine and GABA binding sites.
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Affiliation(s)
- K Xiang
- Department of Physiology and Pharmacology, and the Cellular and Molecular Neurobiology Program, University of Toledo College of Medicine, Health Science Campus, 3000 Arlington Avenue, Mailstop 1008, Toledo, OH 43614, USA
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Abstract
AIMS Retinol binding protein 4 (RBP4) is a newly discovered adipokine, which plays a role in insulin resistance and obesity. The aim of this study was to determine the relationship between genetic variants of the RBP4 gene, circulating RBP4 concentrations and phenotypes related to glucose and lipid metabolism in the Chinese population. METHODS We sequenced exons and the putative promoter region to identify single nucleotide polymorphisms (SNPs) in the RBP4 gene in 32 Chinese subjects. Additional SNPs were selected from a public database to increase marker density. Taking account of the pairwise linkage disequilibrium and minor allele frequencies, a subset of SNPs was further genotyped in 255 Type 2 diabetic patients and 372 normal control subjects. Circulating RBP4 concentrations and phenotypes related to glucose and lipid metabolism were measured. RESULTS Ten SNPs were identified and five were further genotyped in the full sample. No individual SNP was significantly associated with Type 2 diabetes, but a rare haplotype CAA formed by +5388 C>T, +8201 T>A and +8204 T>A was more frequent in diabetic patients (P = 0.0343, empirical P = 0.0659 on 10 000 permutations). In both groups, non-coding SNPs were associated with circulating RBP4 concentrations (P < 0.05). In the normal control subjects, the SNP +5388 C>T was associated with serum C-peptide levels both fasting and 2 h after an oral glucose tolerance test (P = 0.0162 and P = 0.0075, respectively). CONCLUSION Our findings suggest that genetic variants in the RBP4 gene may be associated with circulating RBP4 concentration and phenotypes related to glucose metabolism.
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Affiliation(s)
- C Hu
- Shanghai Diabetes Institute, Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Abstract
Diabetes mellitus is a clinically heterogeneous disorder which is characterized by hyperglycaemia due to an absolute or relative deficiency of insulin. Both genetic and non-genetic factors contribute to its development and, as such, it represents a multifactorial disorder. In addition, it may also be, in some instances, a polygenic disorder resulting from the cumulative effects of several genes with or without environmental factors. Serological and/or DNA markers for genes that confer susceptibility to the insulin-dependent form of the disorder (IDDM; type 1) have been identified in the HLA-D region of chromosome 6 and near the insulin gene on chromosome 11. Patients with non-insulin-dependent diabetes mellitus (NIDDM; type 2) make up a more heterogeneous group than those with IDDM and it is likely that in these patients similar clinical phenotypes may be produced by different genetic defects. The synthesis of either an abnormal insulin/proinsulin molecule or an abnormal insulin receptor can confer susceptibility to NIDDM. The genes encoding insulin and the insulin receptor are on chromosomes 11 and 19, respectively. In addition, studies of restriction fragment length polymorphism and disease associations suggest that two other genes may contribute to the development of NIDDM on chromosome 11, one near the insulin gene on the short arm of this chromosome and the other near the apolipoprotein A-I gene on the long arm. None of the susceptibility genes that have been identified to date causes diabetes in the absence of other genetic or non-genetic contributing factors, which is consistent with a multifactorial or polygenic origin for this disorder.
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MESH Headings
- Alleles
- Amino Acid Sequence
- Chromosome Mapping
- Chromosomes, Human, Pair 11
- Chromosomes, Human, Pair 19
- Chromosomes, Human, Pair 6
- Diabetes Mellitus, Type 1/genetics
- Diabetes Mellitus, Type 2/genetics
- Genetic Markers
- Humans
- Insulin/genetics
- Molecular Sequence Data
- Polymorphism, Genetic
- Polymorphism, Restriction Fragment Length
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Affiliation(s)
- G I Bell
- Department of Biochemistry & Molecular Biology, University of Chicago, Illinois 60637
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Hu C, Jia W, Fang Q, Zhang R, Wang C, Lu J, Xiang K. Peroxisome proliferator-activated receptor (PPAR) delta genetic polymorphism and its association with insulin resistance index and fasting plasma glucose concentrations in Chinese subjects. Diabet Med 2006; 23:1307-12. [PMID: 17116180 DOI: 10.1111/j.1464-5491.2006.02001.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
AIMS Previous studies have shown that the peroxisome proliferator-activated receptor delta (PPARD) genetic polymorphism affects cholesterol metabolism in Whites. This association was not observed in a Korean population in a separate study, but this study showed a link between the PPARD polymorphism and body weight and fasting plasma glucose. The purpose of this study was to determine whether polymorphisms of PPARD influence glucose and cholesterol metabolism in Chinese subjects. We investigated the association between the polymorphism (-87T/C) of the human PPARD gene and phenotypes related to body weight, insulin sensitivity, glucose and lipid metabolism in Chinese subjects. METHODS Unrelated Chinese subjects (n = 663) in Shanghai were studied; 287 had newly diagnosed Type 2 diabetes mellitus and 376 were non-diabetic control subjects over 40 years old. Clinical parameters were collected and genotypes were determined by polymerase chain reaction-restriction fragment length polymorphism. RESULTS In normal glucose tolerant (NGT) subjects, the C allele carriers had higher fasting plasma glucose concentrations (P = 0.0078) and a lower insulin sensitivity index (ISI) (P = 0.0365). The C allele carriers also showed higher concentrations of low-density lipoprotein cholesterol (P = 0.0261) and percentage of body fat (P = 0.0357). There was a trend towards higher visceral adiposity in C allele carriers, but the difference was not significant (P = 0.0830). In diabetes patients, similar results were detected for plasma glucose concentrations (fasting plasma glucose P < 0.0001, 2-h plasma glucose P = 0.0052) and insulin sensitivity (homeostasis model assessment of insulin resistance P = 0.0094; ISI P = 0.0058). CONCLUSION The PPARD-87T/C polymorphism is associated with higher fasting plasma glucose concentrations in both NGT and diabetic subjects, largely due to impaired insulin sensitivity.
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Affiliation(s)
- C Hu
- Shanghai Diabetes Institute, Department of Endocrinology and Metabolism, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, China
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Wang C, Fang Q, Zhang R, Lin X, Xiang K. Scanning for MODY5 gene mutations in Chinese early onset or multiple affected diabetes pedigrees. Acta Diabetol 2004; 41:137-45. [PMID: 15660195 DOI: 10.1007/s00592-004-0157-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2002] [Accepted: 07/14/2004] [Indexed: 12/14/2022]
Abstract
Mutation of HNF-1beta gene has been reported in early onset diabetes or MODY families and this gene has been defined as MODY5 gene. The aim of our study was to examine whether HNF-1beta mutation contribute to early onset or multiple affected diabetes pedigrees in Chinese. Molecular scanning of HNF-1beta gene promoter region, nine exons and flanking introns was performed in 154 unrelated probands from early onset and multiple affected diabetes Chinese pedigrees. The family members of probands with mutations or variants and 58 nondiabetics were also examined. Clinical examinations of renal morphology, renal function and beta-cell function were performed in the HNF-1beta gene mutation carriers and family members. Mutation of HNF-1beta gene causing the substitution S36F was found in two subjects of an early onset diabetic family. One carrier has early onset diabetes, renal function impairment and renal cyst, while the other has impaired glucose tolerance only. This is the first case of MODY5 gene mutation diabetes found in the Chinese. Three HNF-1beta variants were identified and no significant differences in allele frequencies for these variants were detected between the nondiabetic and diabetic groups. Nucleotide 66 of intron 8 of HNF-1beta gene was G in the Chinese population rather than A as noted in the GenBank sequence. These results suggest that HNF-1beta gene mutations may be associated with nondiabetic renal dysfunction and diabetes in Chinese, but they are responsible for only a small percentage of early onset or multiple affected diabetes pedigrees including MODY.
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Affiliation(s)
- C Wang
- Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai No. 6 People's Hospital, Shanghai Jiao Tong University, 600 Yishan Road, Shanghai 200233, China
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Xiang K, Fang Q, Zheng T, Jia W, Wang Y, Zhang R, Li J, Shen K. [The impact of calpain-10 gene combined-SNP variation on type 2 diabetes mellitus and its related metabolic traits]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2001; 18:426-30. [PMID: 11774208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To investigate the impact of calpain-10 gene (CAPN-10) combined single nucleotide polymorphism (SNP) variation on type 2 diabetes mellitus (T2DM) and its related clinical metabolic traits in Chinese. METHODS The study population consisted of 268 Chinese residents in Shanghai. Among them, 144 were subjects with normal glucose tolerance (NGT) and 124, with T2DM. Plasma glucose (PG), insulin (INS), c-peptide (CP) and free fatty acids (FFA) levels were measured at fasting and 30, 60, 120, and 180 minutes after oral 75 g glucose challenge. The islet beta-cell insulin secretion and tissue insulin sensitivity were assessed. CAPN-10 UCSNP44,-43,-19 and -63 were genotyped. RESULTS (1) In Chinese NGT subjects, the major allele of UCSNP-44 was allele T (frequency=91%), of UCSNP43 was G(89%), of UCSNP-19 was I (3 repeats of a 32 bp sequence) (67%) and of UCSNP-63 was C allele (79%). Significant differences were observed in comparison of these allele frequencies in Chinese to those in other ethnic groups reported in the literature. (2) 14 genotype combinations of these four SNPs were observed in Chinese NGT subjects. 69% of the NGT population was composed of four genotype combinations, in the order of UCSNP44,-43,-19 and -63, i.e., combination A:TT-GG-DI-CC(haplotype combination was 1121/1111) (frequency=10%), combination B:TT-GA-II-CC(1121/1221)(10%), combination C:TT-GG-II-CC(1121/1121)(26%) and combination D:TT-GG-DI-CT(1121/1112)(22%).(3) The frequencies of the above mentioned SNP in single or in combinations were not different significantly between NGT and T2DM groups. (4) The variation of clinical metabolic parameter levels shifted from completely normal towards abnormal glucose intolerance among genotype combination subgroups. In comparison between combination A and combination D, subjects in the former subgroups had: higher PG levels with delayed peak after glucose challenge; less and lower decrement of FFA levels after challenge with no rising in late stage; higher insulin levels with delayed peak after challenge; and the tendency of decreased insulin sensitivity. More than half of the comparisons remained statistically significant after adjusted with age, gender, body mass index and waist circumference. CONCLUSION The variation of calpain-10 gene has impact on the variation of clinical metabolic parameter levels related to type 2 diabetes mellitus. Such impact depends upon the haplotypes as well as the haplotype combination of calpain-10 gene variations.
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Affiliation(s)
- K Xiang
- Shanghai Diabetes Institute, Department of Endocrinology & Metabolism, Shanghai No. 6 People Hospital, Shanghai, 200233 P.R.China.
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Bao Y, Jia W, Xiang K, Chen L, Lu J. [Dyslipidaemia and insulin resistance in Chinese in Shanghai]. Zhonghua Nei Ke Za Zhi 2001; 40:299-302. [PMID: 11798589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To investigate the impact of dyslipidaemia on insulin resistance in Chinese individuals in Shanghai. METHODS 830 individuals aged over 40 years (male 300, female 530) were divided into normal and dyslipidaemia groups. The latter included 7 subgroups as follows: low high density lipoprotein (L-HDL)-subgroup I, high triglycerides (H-TG)-subgroup II, high total cholesterol or high low density lipoprotein (H-TC/H-LDL)-subgroup III, low high density lipoprotein with high triglycerides (L-HDL + H-TG)-subgroup IV, low high density lipoprotein with high total cholesterol or high low density lipoprotein (L-HDL + H-TC/H-LDL)-subgroup V, high triglycerides with high total cholesterol or high low density lipoprotein(H-TG + H-TC/H-LDL)-subgroup VI, low high density lipoprotein with high triglycerides and high total cholesterol or high low density lipoprotein (L-HDL + H-TG + H-TC/H-LDL)-subgroup VII. Homeostasis model assessment (HOMA) was applied to estimate the degree of insulin resistance (IR). RESULTS (1) Adjusted with age, sex and body mass index (BMI), HOMA-IR was increased in the dyslipidaemia subgroups with high triglycerides. (2) Hypertriglyceridemia was more closely related to raised BMI and waist-hip ratio (WHR). (3) Both body fat (BMI, WHR) and triglycerides were independent risk factors accounting for HOMA-IR. CONCLUSION Hypertriglycerides could be regarded as an independent risk factor for insulin resistance.
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Affiliation(s)
- Y Bao
- Department of Endocrinology and Metabolism, Shanghai Sixth People's Hospital, Shanghai Diabetes Research Institute, Shanghai 200233, China
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Abstract
We show how the phenomena of genetic dominance, overdominance, additivity, and epistasis are generic features of simple diploid gene regulatory networks. These regulatory network models are together sufficiently complex to catch most of the suggested molecular mechanisms responsible for generating dominant mutations. These include reduced gene dosage, expression or protein activity (haploinsufficiency), increased gene dosage, ectopic or temporarily altered mRNA expression, increased or constitutive protein activity, and dominant negative effects. As classical genetics regards the phenomenon of dominance to be generated by intralocus interactions, we have studied two one-locus models, one with a negative autoregulatory feedback loop, and one with a positive autoregulatory feedback loop. To include the phenomena of epistasis and downstream regulatory effects, a model of a three-locus signal transduction network is also analyzed. It is found that genetic dominance as well as overdominance may be an intra- as well as interlocus interaction phenomenon. In the latter case the dominance phenomenon is intimately connected to either feedback-mediated epistasis or downstream-mediated epistasis. It appears that in the intra- as well as the interlocus case there is considerable room for additive gene action, which may explain to some degree the predictive power of quantitative genetic theory, with its emphasis on this type of gene action. Furthermore, the results illuminate and reconcile the prevailing explanations of heterosis, and they support the old conjecture that the phenomenon of dominance may have an evolutionary explanation related to life history strategy.
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Affiliation(s)
- S W Omholt
- Department of Animal Science, Agricultural University of Norway, Aas.
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Wu S, Xiang K, Zheng T, Sun D, Weng Q, Zhao H, Li J. Relationship between the renin-angiotensin system genes and diabetic nephropathy in the Chinese. Chin Med J (Engl) 2000; 113:437-41. [PMID: 11776100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
OBJECTIVE To clarify whether genetic variants of the renin-angiotensin system (RAS) contribute to the development of diabetic nephropathy (DN) in the Chinese. METHODS Totally 173 Chinese subjects of Han nationality from Shanghai were classified into! control, DN (-) and DN (+) groups. The latter was subdivided according to diabetic duration at the onset of DN and the stage of DN. Genotyping of five polymorphic sites in four key genes of the RAS: the AGT-T174M, AGT-M235T and AGTR1 genotypes were determined by PCR/restriction enzyme digestion. The insertion/deletion (I/D) and [ACAC] n-STR microsatellite polymorphic markers were used for ACE and REN genotyping, respectively. Statistical analysis showed comparisons of gene frequencies between any two groups were made with Fisher's exact test or Chi-square test. Logistic regression analysis was performed to identify predictors of DN. RESULTS The frequencies of ACE-DD genotype and ACE-D allele were much higher in DN(+) group than in DN (-) group (0.25 vs 0.05, 0.47 vs 0.29, respectively), so were the frequencies of TT genotype and T allele in AGT-M235T (0.73 vs 0.54, 0.85 vs 0.68, respectively). DN (+) DUR < 5 years group had greatly increased frequencies of AGT-M235T allele and ACE-DD genotype in comparison with DN(-) group (0.92 vs 0.68 and 0.28 vs 0.05, respectively). Logistic regression analysis further identified these two genes as contributing factors to DN. Although AGTR1 and AGT-T174M genotyping analysis revealed differences in frequency distribution between DN (+) and DN (-) or control groups, logistic regression analysis failed to implicate them in the development of DN. CONCLUSIONS Our study revealed RAS genes, ACE and AGT-M235T but not AGT-T174M, AGTR1 or REN genotypes, as contributing factors for DN in type 2 diabetes mellitus in Chinese.
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Affiliation(s)
- S Wu
- Department of Endocrinology and Metabolism, Diabetes Research Laboratory and Medical Genetics Research Laboratory, Shanghai Sixth People's Hospital, Shanghai Second Medical University, Shanghai 200233, China
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Zheng Y, Xiang K, Zhang R, Jia W, Lu J, Tang J, Li J. [The association between A55V variant in UCP2 gene and body fat distribution, serum lipid profile in Chinese]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2000; 17:97-100. [PMID: 10751530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
OBJECTIVE Uncoupling protein 2(UCP2) could play an important role in energy metabolism and body weight regulation. The aim of this study was to investigate Ala55Val(A55V) variant in the UCP2 gene has effects on serum lipid profile, body fat and its distribution in Chinese. METHODS The genotypes of A55V variant in the UCP2 gene were determined by a PCR-RFLP assay in 359 unrelated Chinese [including 193 normal glucose tolerance(NGT) and 166 type 2 diabetic subjects by ADA 97' criteria]. The parameters for regional adipose tissue distribution were measured by magnetic resonance imaging(MRI). RESULTS In NGT group, an association between A55V variant in the UCP2 gene and body mass index(BMI) (P=0.0246), as well as femoral subcutaneous adipose tissue area (FA) (P=0.0017), was noted in females. A55V variant in the UCP2 gene was also associated with serum triglyceride (TG) level (P=0.0072) in males. However, in type 2 diabetes group, an association between A55V variant in the UCP2 gene and FA (P=0.0150) was replicated in females too. Those females who were homozygotes of AA in the UCP2 gene had decreased FA not only in NGT group but also in type 2 diabetes group. Furthermore, logistic regression analysis indicated that FA (P=0.0098 in NGT females, P=0.0071 in type 2 diabetic females) and BMI (P=0.0016 in NGT females), as well as TG level (P=0.0040 in NGT males) were associated with this variant in the UCP2 gene. CONCLUSION A55V variant in the UCP2 gene is associated not only with FA (in NGT females and type 2 diabetic females) but also with BMI (in NGT females). Therefore A55V variant in the UCP2 gene appears to play a role in body fat and its distribution in Chinese females.
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Affiliation(s)
- Y Zheng
- Department of Endocrinology and Metabolism, Shanghai Sixth People's Hospital, Shanghai, 200233 P.R. China
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Fang Q, Xiang K, Lu J. [The mechanism of tumor necrosis factor-alpha (TNF-alpha) induced insulin resistance by variation in promoter region of TNF-alpha gene]. Zhonghua Yi Xue Za Zhi 1999; 79:343-5. [PMID: 11715473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
OBJECTIVE To investigate the relationship between the G to A variant at the--308 bp of the promoter region of tumor necrosis factor-alpha gene (TNF-alpha-P) and the body adiposity, the insulin secretion and action, and the glucose and lipid levels in Chinese population. METHOD 359 Chinese were genotyped for the TNF-alpha-P by using PCR/Nco I digestion. Fasting blood lipid profile and the levels of plasma glucose (PG), insulin (INS), c-peptide (CP) and the free fatty acids (FFA) at 0, 1/2, 1, 2 and 3 hours after glucose challenge were measured. RESULTS Genotype frequencies of TNF-alpha-P were not associated with diabetes and obesity. The genotype frequency of the G/A heterozygotes was significantly increased in non-diabetic subgroups with less decreased levels of 2 h-FFA and AUC-FFA after glucose challenge (Fisher exact P = 0.002 and 0.041 respectively). The FFA levels in non-diabetics with G/A heterozygotes were higher than those with G/G homozygotes, especially in the comparisons of the 2 h and 3 h FFA levels after glucose challenge (P = 0.029 and 0.030 respectively). Similar tendency was also observed in diabetics. CONCLUSION Circulation FFA level reflects the degree of lipolysis in adipose tissue. The difference in the degree of lipolysis led by the variant of the promoter region of TNF-alpha may be one of the mechanisms for the variation in the degree of insulin resistance in general population.
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Affiliation(s)
- Q Fang
- Department of Medical Genetics Research Laboratory, Shanghai Sixth People's Hospital, Shanghai 200233
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