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Zhang CL, Liu C, Ding YW, Wang HT, Nie SR, Zhang YP. A novel fluorescent probe based on naphthimide for H 2S identification and application. Anal Biochem 2023; 677:115232. [PMID: 37481195 DOI: 10.1016/j.ab.2023.115232] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 05/24/2023] [Revised: 07/01/2023] [Accepted: 07/03/2023] [Indexed: 07/24/2023]
Abstract
In view of the superior chemical activity of selenoether bond (-Se-) and the excellent optical properties of naphthimide, a novel fluorescent probe (NapSe) with near-rectangular structure, which contains double naphthimide fluorophores linked by selenoether bond, is designed for specific fluorescence detection of hydrogen sulfide (H2S). NapSe has excellent optical properties: super large Stokes Shift (190 nm) and good stability in a wide pH range. The selectivity of NapSe fluorescence detection of H2S is high, and displays excellent "turn-on" phenomenon and strong anti-interference. And the fluorescence intensity increased obviously, reaching 42 times. The time response of probe NapSe is very rapid (3 min) compared with other fluorescence probes that respond to H2S. It shows high sensitivity by calculating the detection limit (LOD) as low as 5.4 μM. Notably, the identification of H2S by probe NapSe has been successfully applied to the detection of test paper and the detection of exogenous and endogenous fluorescence imaging of MCF-7 breast cancer cells.
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Affiliation(s)
- Cheng-Lu Zhang
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, China.
| | - Chang Liu
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, China
| | - Yan-Wei Ding
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, China
| | - Hai-Tao Wang
- Dalian No.24 High School, Dalian, 116001, China.
| | - Shi-Ru Nie
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, China
| | - Yan-Peng Zhang
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, China
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Zhang HC, Zhou XY, Fu DL, Ding YW, Xiao Q, Yuan Y. [The efficacy and side effects of rigosertib combined with chemotherapy in KRAS mutant colorectal cancer mice]. Zhonghua Zhong Liu Za Zhi 2023; 45:138-145. [PMID: 36781234 DOI: 10.3760/cma.j.cn112152-20210514-00379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Objective: To investigate the effect of rigosertib (RGS) combined with classic chemotherapy drugs including 5-fluorouracil, oxaliplatin, and irinotecan in colorectal cancer. Methods: Explore the synergy effects of RGS and 5-fluorouracil (5-FU), oxaliplatin (OXA), and irinotecan (IRI) on colorectal cancer by subcutaneously transplanted tumor models of mice. The mice were randomly divided into control group, RGS group, 5-FU group, OXA group, IRI group, 5-FU+ RGS group, OXA+ RGS group and IRI+ RGS group. The synergy effects of RGS and OXA on KRAS mutant colorectal cancer cell lines in vitro was detected by CCK-8. Ki-67 immunohistochemistry and TdT-mediated dUTP nick-end labeling (TUNEL) staining were performed on the mouse tumor tissue sections, and the extracted tumor tissue was analyzed by western blot. The blood samples of mice after chemotherapy and RGS treatment were collected, blood routine and liver and kidney function analysis were conducted, and H&E staining on liver sections was performed to observe the side effects of chemotherapy and RGS. Results: The subcutaneously transplanted tumor models were established successfully in all groups. 55 days after administration, the fold change of tumor size of OXA+ RGS group was 37.019±8.634, which is significantly smaller than 77.571±15.387 of RGS group (P=0.029) and 92.500±13.279 of OXA group (P=0.008). Immunohistochemical staining showed that the Ki-67 index of tumor tissue in control group, OXA group, RGS group and OXA+ RGS group were (100.0±16.8)%, (35.6±11.3)%, (54.5±18.1)% and (15.4±3.9)%, respectively. The Ki-67 index of OXA+ RGS group was significantly lower than that in control group (P=0.014), but there was no significant difference compared to OXA group and RGS group (OXA: P=0.549; RGS: P=0.218). TUNEL fluorescence staining showed that the apoptotic level of OXA+ RGS group was 3.878±0.547, which was significantly higher than 1.515±0.442 of OXA group (P=0.005) and 1.966±0.261 of RGS group (P=0.008). Western blot showed that the expressions of apoptosis related proteins such as cleaved-PARP, cleaved-caspase 3 and cleaved-caspase 8 in the tumor tissues of mice in the OXA+ RGS group were higher than those in control group, OXA group and RGS group. After the mice received RGS combined with chemotherapy drugs, there was no significant effect on liver and kidney function indexes, but the combined use of oxaliplatin and RGS significantly reduced the white blood cells [(0.385±0.215)×10(9)/L vs (5.598±0.605)×10(9)/L, P<0.001] and hemoglobin[(56.000±24.000)g/L vs (153.333±2.231)g/L, P=0.001] of the mice. RGS, chemotherapy combined with RGS and chemotherapy alone did not significantly increase the damage to liver cells. Conclusions: The combination of RGS and oxaliplatin has a stronger anti-tumor effect on KRAS mutant colorectal cancer. RGS single agent will not cause significant bone marrow suppression and hepatorenal injury in mice, but its side effects may increase correspondingly after combined with chemotherapy.
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Affiliation(s)
- H C Zhang
- Department of Medical Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - X Y Zhou
- Department of Colorectal Surgery and Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - D L Fu
- Department of Colorectal Surgery and Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Y W Ding
- Department of Medical Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Q Xiao
- Department of Colorectal Surgery and Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Y Yuan
- Department of Medical Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
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Zhang LL, Tong L, Lv XH, Yan QQ, Ding YW, Wang YC, Liang HW. A Top-Down Templating Strategy toward Functional Porous Carbons. Small 2022; 18:e2201838. [PMID: 35618445 DOI: 10.1002/smll.202201838] [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] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/01/2022] [Indexed: 06/15/2023]
Abstract
Nanostructured carbon materials with high porosity and desired chemical functionalities are of immense interest because of their wide application potentials in catalysis, environment, and energy storage. Herein, a top-down templating strategy is presented for the facile synthesis of functional porous carbons, based on the direct carbonization of diverse organic precursors with commercially available metal oxide powders. During the carbonization, the metal oxide powders can evolve into nanoparticles that serve as in situ templates to introduce nanopores in carbons. The porosity and heteroatom doping of the prepared carbon materials can be engineered by varying the organic precursors and/or the metal oxides. It is further demonstrated that the top-down templating strategy is applicable to prepare carbon-based single-atom catalysts with iron-nitrogen sites, which exhibit a high power density of 545 mW cm-2 in a H2 -air proton exchange membrane fuel cell.
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Affiliation(s)
- Le-Le Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Lei Tong
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Xue-Hui Lv
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Qiang-Qiang Yan
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Yan-Wei Ding
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Yu-Cheng Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Hai-Wei Liang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
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Ma RM, Li GG, Ding YW, Lyu J, Shao CQ, Liu JZ, Liu J, Zhang GJ. [Correlation of serum lipids levels of Alzheimer's disease patients with sex, age and apolipoprotein E gene polymorphism]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:280-286. [PMID: 35381648 DOI: 10.3760/cma.j.cn112150-20211026-00996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To explore the correlation of serum lipids levels of Alzheimer's disease (AD) patients with sex, age and apolipoprotein E (Apo E) gene polymorphism. Methods: The retrospective study method was used, and 407 AD patients (142 males and 265 females, aged 52-91 years) were selected from Beijing Tiantan Hospital from January 2015 to August 2021 as the research target, and 894 healthy persons (339 males and 555 females, aged 52-94 years) who did body examination were selected as the control group. The AD patients were divided into four age groups according to the age interval of 10 years, including 85 aged 50-59 years, 163 aged 60-69 years, 119 aged 70-79 years, and 40 aged more than 80 years. The serum lipids levels were detected by biochemical analyzer, including triglycerides (TG), cholesterol (CHO), high density lipoprotein cholesterol (HDL-C), low density lipoprotein cholesterol (LDL-C), apolipoproteinA1(Apo A1) and apolipoprotein B (Apo B). ApoE gene polymorphism were detected by PCR fluorescent probe method. Mann-Whitney U test and Kruskal-Wallis H test were used to compare the serum lipids levels in each group. Results: The levels of serum CHO and LDL-C were 3.30(1.41,4.82) mmol/L and 1.76(1.39,2.78) mmol/L in AD patients, and 4.84(4.24, 5.56) mmol/L and 2.91(2.36, 3.57) mmol/L in control group, and the levels of serum CHO and LDL-C of AD patients were significantly lower than control group (Z=-15.172,Z=-14.583, P<0.001, P<0.001). The levels of serum HDL-C and Apo B were 1.84(1.30, 3.88) mmol/L and 1.17(0.85, 1.57) g/L in AD patients, and 1.39(1.18, 1.64) mmol/L and 0.93(0.81, 1.09) g/L in control group, and the levels of serum HDL-C and Apo-B of AD patients were significantly higher than control group (Z=-12.249, Z=-9.706, P<0.001, P<0.001). There was no significant difference in TG and Apo A1 between 2 groups (Z=-1.577, Z=-0.408, P=0.115, P=0.683). The levels of TG, CHO, LDL-C in female AD patients were significantly higher than male patients (Z=-2.737, Z=-3.963, Z=-4.417, P=0.006, P<0.001, P<0.001). There were significant differences in TG, CHO, HDL-C, LDL-C, Apo A1 and Apo B among AD patients of all age groups (Z=11.263, Z=10.060, Z=40.246, Z=10.451, Z=24.315, Z=19.922, P=0.010, P=0.018, P<0.001, P=0.015, P<0.001, P<0.001). The serum CHO and LDL-C levels were positively correlated with age (rs=0.160, rs=0.174, P=0.001, P<0.001), and HDL-C, Apo A1 and Apo B levels were negatively correlated with age (rs=-0.312, rs=-0.272, rs=-0.146, P<0.001, P<0.001, P=0.003), and there was no correlation between TG level and age in AD patients (rs=0.086, P=0.082). There were 3 cases (3.33%) of E2, 43 cases of E3 (47.78%) and 44 cases of E4 (48.89%) in AD patients, and 22 cases (12.72%) of E2, 117 cases of E3 (67.63%) and 34 cases of E4 (19.65%) in control group. There was significant difference in Apo E genotype distribution between AD patients and control group (χ²=26.381, P<0.001). Apo E4 was the most common genotype in AD patients, and the proportion was 48.89%. Except for Apo A1(Z=7.821, P=0.020), there was no significant difference in TG, CHO, HDL-C, LDL-C and Apo B levels among all patients with different genotypes (Z=3.732, Z=1.677, Z=1.455, Z=1.619, Z=2.202, P=0.155, P=0.432, P=0.483, P=0.445, P=0.333). Conclusion: The levels of CHO and LDL-C decreased while the levels of HDL-C and Apo B increased in AD patients. The dyslipidemia in AD patients might be correlated with age, but not sex and Apo E genotypes.
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Affiliation(s)
- R M Ma
- Laboratory Department, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070,China Beijing Engineering Research Center of Immunological Reagents Clinical Research, Beijing 100070, China National Medical Products Administration, Key Laboratory for Quality Control of In Vitro Diagnostics, Beijing 100070, China
| | - G G Li
- Laboratory Department, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070,China
| | - Y W Ding
- Laboratory Department, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070,China
| | - J Lyu
- Laboratory Department, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070,China Beijing Engineering Research Center of Immunological Reagents Clinical Research, Beijing 100070, China National Medical Products Administration, Key Laboratory for Quality Control of In Vitro Diagnostics, Beijing 100070, China
| | - C Q Shao
- Laboratory Department, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070,China Beijing Engineering Research Center of Immunological Reagents Clinical Research, Beijing 100070, China National Medical Products Administration, Key Laboratory for Quality Control of In Vitro Diagnostics, Beijing 100070, China
| | - J Z Liu
- Laboratory Department, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070,China Beijing Engineering Research Center of Immunological Reagents Clinical Research, Beijing 100070, China National Medical Products Administration, Key Laboratory for Quality Control of In Vitro Diagnostics, Beijing 100070, China
| | - J Liu
- Laboratory Department, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070,China Beijing Engineering Research Center of Immunological Reagents Clinical Research, Beijing 100070, China National Medical Products Administration, Key Laboratory for Quality Control of In Vitro Diagnostics, Beijing 100070, China
| | - G J Zhang
- Laboratory Department, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070,China Beijing Engineering Research Center of Immunological Reagents Clinical Research, Beijing 100070, China National Medical Products Administration, Key Laboratory for Quality Control of In Vitro Diagnostics, Beijing 100070, China
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Xu SL, Shen SC, Zhao S, Ding YW, Chu SQ, Chen P, Lin Y, Liang HW. Synthesis of carbon-supported sub-2 nanometer bimetallic catalysts by strong metal-sulfur interaction. Chem Sci 2020; 11:7933-7939. [PMID: 34094162 PMCID: PMC8163286 DOI: 10.1039/d0sc02620d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 07/06/2020] [Indexed: 12/13/2022] Open
Abstract
Small-sized bimetallic nanoparticles that integrate the advantages of efficient exposure of the active metal surface and optimal geometric/electronic effects are of immense interest in the field of catalysis, yet there are few universal strategies for synthesizing such unique structures. Here, we report a novel method to synthesize sub-2 nm bimetallic nanoparticles (Pt-Co, Rh-Co, and Ir-Co) on mesoporous sulfur-doped carbon (S-C) supports. The approach is based on the strong chemical interaction between metals and sulfur atoms that are doped in the carbon matrix, which suppresses the metal aggregation at high temperature and thus ensures the formation of small-sized and well alloyed bimetallic nanoparticles. We also demonstrate the enhanced catalytic performance of the small-sized bimetallic Pt-Co nanoparticle catalysts for the selective hydrogenation of nitroarenes.
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Affiliation(s)
- Shi-Long Xu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
| | - Shan-Cheng Shen
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
| | - Shuai Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
| | - Yan-Wei Ding
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
| | - Sheng-Qi Chu
- Institute of High Energy Physics, Chinese Academy of Sciences Beijing 100049 China
| | - Ping Chen
- School of Chemistry and Chemical Engineering, Anhui University Hefei Anhui 230601 China
| | - Yue Lin
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
| | - Hai-Wei Liang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China Hefei 230026 China
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Tong L, Zhang LL, Wang YC, Wan LY, Yan QQ, Hua C, Jiao CJ, Zhou ZY, Ding YW, Liu B, Liang HW. Hierarchically Porous Carbons Derived from Nonporous Coordination Polymers. ACS Appl Mater Interfaces 2020; 12:25211-25220. [PMID: 32401490 DOI: 10.1021/acsami.0c06423] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hierarchically porous carbons (HPCs) with multimodal pore systems exhibit great technological potentials, especially in the fields of heterogeneous catalysis, energy storage, and conversion. Here, we establish a simple and general approach to HPCs by carbonization of nonporous coordination polymers that are produced by mixing metal salts with polytopic ligands in alkaline aqueous solutions at room temperature. The proposed approach is applicable to a wide scope of ligand molecules (18 examples), thus affording the synthesized HPCs with high diversity in porosity, morphology, and composition. In particular, the prepared HPCs exhibit high specific surface areas (up to 2647 m2 g-1) and large pore volumes (up to 2.39 cm3 g-1). The HPCs-supported atomically dispersed Fe-Nx catalysts show much-improved fuel cell cathode performance over the micropore-dominated carbon black-supported catalysts, demonstrating the structural superiority of the HPCs for enhancing the mass transport properties.
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Affiliation(s)
- Lei Tong
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Le-Le Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Yu-Cheng Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative innovation center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Li-Yang Wan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative innovation center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qiang-Qiang Yan
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Cheng Hua
- PerkinElmer Management (Shanghai) Co., Ltd., Shanghai 201203, China
| | - Chen-Jia Jiao
- PerkinElmer Management (Shanghai) Co., Ltd., Shanghai 201203, China
| | - Zhi-You Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative innovation center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yan-Wei Ding
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Bo Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Hai-Wei Liang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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Li C, Ding YW, Hu BC, Wu ZY, Gao HL, Liang HW, Chen JF, Yu SH. Temperature-Invariant Superelastic and Fatigue Resistant Carbon Nanofiber Aerogels. Adv Mater 2020; 32:e1904331. [PMID: 31773829 DOI: 10.1002/adma.201904331] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 11/01/2019] [Indexed: 06/10/2023]
Abstract
Superelastic and fatigue-resistant materials that can work over a wide temperature range are highly desired for diverse applications. A morphology-retained and scalable carbonization method is reported to thermally convert a structural biological material (i.e., bacterial cellulose) into graphitic carbon nanofiber aerogel by engineering the pyrolysis chemistry. The prepared carbon aerogel perfectly inherits the hierarchical structures of bacterial cellulose from macroscopic to microscopic scales, resulting in remarkable thermomechanical properties. In particular, it maintains superelasticity without plastic deformation even after 2 × 106 compressive cycles and exhibits exceptional temperature-invariant superelasticity and fatigue resistance over a wide temperature range at least from -100 to 500 °C. This aerogel shows unique advantages over polymeric foams, metallic foams, and ceramic foams in terms of thermomechanical stability and fatigue resistance, with the realization of scalable synthesis and the economic advantage of biological materials.
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Affiliation(s)
- Chao Li
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Department of Chemistry, Institute of Biomimetic Materials and Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Yan-Wei Ding
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Department of Chemistry, Institute of Biomimetic Materials and Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Bi-Cheng Hu
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Department of Chemistry, Institute of Biomimetic Materials and Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Zhen-Yu Wu
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Department of Chemistry, Institute of Biomimetic Materials and Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Huai-Ling Gao
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Department of Chemistry, Institute of Biomimetic Materials and Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Hai-Wei Liang
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Department of Chemistry, Institute of Biomimetic Materials and Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Jia-Fu Chen
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Department of Chemistry, Institute of Biomimetic Materials and Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Shu-Hong Yu
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Department of Chemistry, Institute of Biomimetic Materials and Chemistry, University of Science and Technology of China, Hefei, 230026, China
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Wu ZY, Xu SL, Yan QQ, Chen ZQ, Ding YW, Li C, Liang HW, Yu SH. Transition metal-assisted carbonization of small organic molecules toward functional carbon materials. Sci Adv 2018; 4:eaat0788. [PMID: 30062124 PMCID: PMC6063540 DOI: 10.1126/sciadv.aat0788] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 06/18/2018] [Indexed: 05/22/2023]
Abstract
Nanostructured carbon materials with large surface area and desired chemical functionalities have been attracting considerable attention because of their extraordinary physicochemical properties and great application potentials in catalysis, environment, and energy storage. However, the traditional approaches to fabricating these materials rely greatly on complex procedures and specific precursors. We present a simple, effective, and scalable strategy for the synthesis of functional carbon materials by transition metal-assisted carbonization of conventional small organic molecules. We demonstrate that transition metals can promote the thermal stability of molecular precursors and assist the formation of thermally stable polymeric intermediates during the carbonization process, which guarantees the successful preparation of carbons with high yield. The versatility of this synthetic strategy allows easy control of the surface chemical functionality, porosity, and morphology of carbons at the molecular level. Furthermore, the prepared carbons exhibit promising performance in heterogeneous catalysis and electrocatalysis.
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Affiliation(s)
- Zhen-Yu Wu
- Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Shi-Long Xu
- Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Qiang-Qiang Yan
- Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Zhi-Qin Chen
- Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Yan-Wei Ding
- Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Chao Li
- Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Hai-Wei Liang
- Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
- Corresponding author. (H.-W.L.); (S.-H.Y.)
| | - Shu-Hong Yu
- Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
- Chinese Academy of Sciences (CAS) Center for Excellence in Nanoscience, Collaborative Innovation Center of Suzhou Nano Science and Technology, Hefei Science Center of CAS, University of Science and Technology of China, Hefei 230026, China
- Corresponding author. (H.-W.L.); (S.-H.Y.)
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9
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Affiliation(s)
- Si-Cheng Li
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale; Collaborative Innovation Center of Suzhou Nano Science and Technology; Department of Chemistry; CAS Center for Excellence in Nanoscience; Hefei Science Center of CAS; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Bi-Cheng Hu
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale; Collaborative Innovation Center of Suzhou Nano Science and Technology; Department of Chemistry; CAS Center for Excellence in Nanoscience; Hefei Science Center of CAS; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Yan-Wei Ding
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale; Collaborative Innovation Center of Suzhou Nano Science and Technology; Department of Chemistry; CAS Center for Excellence in Nanoscience; Hefei Science Center of CAS; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Hai-Wei Liang
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale; Collaborative Innovation Center of Suzhou Nano Science and Technology; Department of Chemistry; CAS Center for Excellence in Nanoscience; Hefei Science Center of CAS; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Chao Li
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale; Collaborative Innovation Center of Suzhou Nano Science and Technology; Department of Chemistry; CAS Center for Excellence in Nanoscience; Hefei Science Center of CAS; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zi-You Yu
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale; Collaborative Innovation Center of Suzhou Nano Science and Technology; Department of Chemistry; CAS Center for Excellence in Nanoscience; Hefei Science Center of CAS; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zhen-Yu Wu
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale; Collaborative Innovation Center of Suzhou Nano Science and Technology; Department of Chemistry; CAS Center for Excellence in Nanoscience; Hefei Science Center of CAS; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Wen-Shuai Chen
- Key laboratory of Bio-based Material Science and Technology, Ministry of Education; Northeast Forestry University; Harbin 150040 P. R. China
| | - Shu-Hong Yu
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale; Collaborative Innovation Center of Suzhou Nano Science and Technology; Department of Chemistry; CAS Center for Excellence in Nanoscience; Hefei Science Center of CAS; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
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Li SC, Hu BC, Ding YW, Liang HW, Li C, Yu ZY, Wu ZY, Chen WS, Yu SH. Wood-Derived Ultrathin Carbon Nanofiber Aerogels. Angew Chem Int Ed Engl 2018; 57:7085-7090. [PMID: 29687551 DOI: 10.1002/anie.201802753] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 04/02/2018] [Indexed: 11/09/2022]
Abstract
Carbon aerogels with 3D networks of interconnected nanometer-sized particles exhibit fascinating physical properties and show great application potential. Efficient and sustainable methods are required to produce high-performance carbon aerogels on a large scale to boost their practical applications. An economical and sustainable method is now developed for the synthesis of ultrathin carbon nanofiber (CNF) aerogels from the wood-based nanofibrillated cellulose (NFC) aerogels via a catalytic pyrolysis process, which guarantees high carbon residual and well maintenance of the nanofibrous morphology during thermal decomposition of the NFC aerogels. The wood-derived CNF aerogels exhibit excellent electrical conductivity, a large surface area, and potential as a binder-free electrode material for supercapacitors. The results suggest great promise in developing new families of carbon aerogels based on the controlled pyrolysis of economical and sustainable nanostructured precursors.
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Affiliation(s)
- Si-Cheng Li
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Bi-Cheng Hu
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Yan-Wei Ding
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Hai-Wei Liang
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Chao Li
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Zi-You Yu
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Zhen-Yu Wu
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Wen-Shuai Chen
- Key laboratory of Bio-based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, P. R. China
| | - Shu-Hong Yu
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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Liu WJ, Jiang H, Tian K, Ding YW, Yu HQ. Mesoporous carbon stabilized MgO nanoparticles synthesized by pyrolysis of MgCl2 preloaded waste biomass for highly efficient CO2 capture. Environ Sci Technol 2013; 47:9397-9403. [PMID: 23895233 DOI: 10.1021/es401286p] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Anthropogenic CO2 emission makes significant contribution to global climate change and CO2 capture and storage is a currently a preferred technology to change the trajectory toward irreversible global warming. In this work, we reported a new strategy that the inexhaustible MgCl2 in seawater and the abundantly available biomass waste can be utilized to prepare mesoporous carbon stabilized MgO nanoparticles (mPC-MgO) for CO2 capture. The mPC-MgO showed excellent performance in the CO2 capture process with the maximum capacity of 5.45 mol kg(-1), much higher than many other MgO based CO2 trappers. The CO2 capture capacity of the mPC-MgO material kept almost unchanged in 19-run cyclic reuse, and can be regenerated at low temperature. The mechanism for the CO2 capture by the mPC-MgO was investigated by FTIR and XPS, and the results indicated that the high CO2 capture capacity and the favorable selectivity of the as-prepared materials were mainly attributed to their special structure (i.e., surface area, functional groups, and the MgO NPs). This work would open up a new pathway to slow down global warming as well as resolve the pollution of waste biomass.
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Affiliation(s)
- Wu-Jun Liu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China
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Ding YW, Wang XL, Ni LL. Dibromido{2-morpholino-N-[1-(2-pyrid-yl)ethyl-idene]ethanamine-κN,N',N''}zinc(II). Acta Crystallogr Sect E Struct Rep Online 2011; 67:m261. [PMID: 21522912 PMCID: PMC3051576 DOI: 10.1107/s1600536811002753] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Accepted: 01/20/2011] [Indexed: 11/12/2022]
Abstract
In the title complex, [ZnBr2(C13H19N3O)], the ZnII atom is five-coordinated by the three N-donor atoms of the Schiff base ligand and by two Br atoms in a distorted square-pyramidal geometry. The morpholine ring adopts a chair conformation.
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Ding YW, Ni LL. 4-Dimethylamino- N′-(3-pyridylmethylidene)benzohydrazide. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o2636. [PMID: 21587608 PMCID: PMC2983199 DOI: 10.1107/s1600536810037670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Accepted: 09/20/2010] [Indexed: 11/10/2022]
Abstract
The title compound, C15H16N4O, was prepared by the reaction of pyridine-3-carbaldehyde with 4-dimethylaminobenzohydrazide in methanol. The dihedral angle between the pyridine and the benzene rings is 5.1 (3)°. In the crystal structure, the hydrazone molecules are linked through intermolecular N—H⋯O hydrogen bonds, forming chains along the b axis.
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Zheng JC, Feng HM, Lam MHW, Lam PKS, Ding YW, Yu HQ. Removal of Cu(II) in aqueous media by biosorption using water hyacinth roots as a biosorbent material. J Hazard Mater 2009; 171:780-785. [PMID: 19596517 DOI: 10.1016/j.jhazmat.2009.06.078] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2009] [Revised: 06/15/2009] [Accepted: 06/15/2009] [Indexed: 05/28/2023]
Abstract
Water hyacinth roots were employed as a biosorbent to remove Cu(II) in aqueous media. Nitrogen adsorption/desorption analysis revealed that the biosorbent was mesoporous with a relatively small surface area. Equilibrium biosorption isotherms showed that the water hyacinth roots possessed a high affinity and sorption capacity for Cu(II) with a monolayer sorption capacity of 22.7 mg g(-1) at initial pH 5.5. Kinetics study at different temperatures revealed that the sorption was a rapid and endothermic process. The activation energy for Cu(II) sorption was estimated to be 30.8 kJ mol(-1), which is typical of activated chemisorption processes. The sorption mechanism was investigated by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, effect of pH and calcium release. These analyses suggested that the biosorption mainly involved the ion exchange of Cu(II) with cations and complex formation with functional groups on the surface of the roots. All the results showed that water hyacinth roots are an alternative low-cost biosorbent for the removal of Cu(II) from aqueous media.
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Affiliation(s)
- Jia-Chuan Zheng
- Advanced Lab for Environmental Research & Technology, USTC-CityU, Suzhou 215123, China
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Fan DJ, Ding YW, Zhou JM. Structural rearrangements and the unfolding mechanism of a Trigger Factor mutant studied by multiple structural probes. Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics 2009; 1794:944-52. [DOI: 10.1016/j.bbapap.2009.03.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2008] [Revised: 03/10/2009] [Accepted: 03/16/2009] [Indexed: 10/21/2022]
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Feng HM, Zhang SJ, Chen YZ, Ding YW, Yu HQ, Lam MHW. Fabrication and Evaluation of Mesoporous Poly(vinyl alcohol)-Based Activated Carbon Fibers. Ind Eng Chem Res 2009. [DOI: 10.1021/ie8012852] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [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)
- Hui-Min Feng
- Advanced Laboratory for Environmental Research & Technology, USTC-CityU, Suzhou, 215123, China, Department of Chemistry and Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, 230026, China, and Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong
| | - Shu-Juan Zhang
- Advanced Laboratory for Environmental Research & Technology, USTC-CityU, Suzhou, 215123, China, Department of Chemistry and Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, 230026, China, and Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong
| | - Yong-Zhen Chen
- Advanced Laboratory for Environmental Research & Technology, USTC-CityU, Suzhou, 215123, China, Department of Chemistry and Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, 230026, China, and Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong
| | - Yan-Wei Ding
- Advanced Laboratory for Environmental Research & Technology, USTC-CityU, Suzhou, 215123, China, Department of Chemistry and Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, 230026, China, and Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong
| | - Han-Qing Yu
- Advanced Laboratory for Environmental Research & Technology, USTC-CityU, Suzhou, 215123, China, Department of Chemistry and Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, 230026, China, and Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong
| | - Michael Hon-Wah Lam
- Advanced Laboratory for Environmental Research & Technology, USTC-CityU, Suzhou, 215123, China, Department of Chemistry and Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei, 230026, China, and Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong
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Chen X, Mikhail SS, Ding YW, Yang GY, Bondoc F, Yang CS. Effects of vitamin E and selenium supplementation on esophageal adenocarcinogenesis in a surgical model with rats. Carcinogenesis 2000. [PMID: 10910955 DOI: 10.1093/carcin/21.8.1531] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Two well-known antioxidative nutrients, vitamin E and selenium, were used in this study to investigate possible inhibitory action against the formation of esophageal adenocarcinoma (EAC) in rats. In this model, carcinogenesis is believed to be driven by oxidative stress. Male Sprague-Dawley rats (8 weeks old) were divided into four groups and received esophagoduodenal anastomosis (EDA) surgery plus iron supplementation (12 mg/kg/week). Vitamin E and selenium were supplemented in the diet in the forms of alpha-tocopheryl acetate (750 IU/kg) and sodium selenate (1.7 mg Se/kg), which were 10 times the regular amounts in the basic AIN93M diet. At 40 weeks after surgery, all the EDA groups had lower body weights than the non-operated control group. Iron nutrition (hemoglobin, total serum iron and transferrin saturation) was normal as a result of iron supplementation after EDA. Vitamin E supplementation maintained the normal plasma level of alpha-tocopherol in EDA rats, but not those of gamma-tocopherol and retinol. Selenium supplementation increased the serum and liver selenium contents of the EDA rats. Histopathological analysis showed that selenium supplementation increased the incidence of EAC and the tumor volume. The selenium level in the tumor is higher than that in the duodenum of the same animal. Vitamin E supplementation, however, inhibited carcinogenesis, especially in the selenium-supplemented group. We believe that vitamin E exerts its effect through its antioxidative properties, and a high dose of inorganic selenium may promote carcinogenesis by enhancing oxidative stress.
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Affiliation(s)
- X Chen
- Laboratory for Cancer Research, College of Pharmacy, Rutgers University, 164 Frelinghuysen Road, Piscataway, NJ 08854, USA
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Abstract
Oxidative damage has long been related to carcinogenesis in human cancers and animal cancer models. Recently a rat esophageal adenocarcinoma (EAC) model was established in our laboratory by using esophagoduodenal anastomosis (EDA) plus iron supplementation. Our previous study suggested that iron supplementation enhanced inflammation and the production of reactive nitrogen species in the esophageal epithelium, which could contribute to esophageal adenocarcinogenesis. Here we further characterized oxidative damage in this model. We were particularly interested in how excess iron was deposited in the esophagus, and which cells were targeted by oxidative damage. Male Sprague-Dawley rats received iron supplementation (50 mg Fe/kg/month, i.p.) starting 4 weeks after EDA. The animals were killed at 11, 30 or 35 weeks after surgery. EAC appeared as early as week 11 after surgery, and increased over time, up to 60% at 35 weeks after surgery. All EACs were well-differentiated mucinous adenocarcinoma at the squamocolumnar junction. Iron deposition was found at the squamocolumnar junction and in the area with esophagitis. Esophageal iron overload could result from transient increase of blood iron after i.p. injection, and the overexpression of transferrin receptor in the premalignant columnar-lined esophagus (CLE) cells. Oxidative damage to DNA (8-hydroxy-2'-deoxyguanosine), protein (carbonyl content) and lipid (thiobarbituric acid reactive substance) in the esophagus was significantly higher than that of the non-operated control. CLE cells were believed to be the target cells of oxidative damage because they overexpressed heme oxygenase 1 and metallothionein, both known to be responsive to oxidative damage. We propose that oxidative damage plays an important role in the formation of EAC in the EDA model, and a similar situation may occur in humans with gastroesophageal reflux and iron over-nutrition.
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Affiliation(s)
- X Chen
- Laboratory for Cancer Research, College of Pharmacy, Rutgers University, 164 Frelinghuysen Road, Piscataway, NJ 08854, USA
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