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Shen JY, Shi CY, Pan ZM, Ju LL, Dong MD, Chen GF, Zhang YC, Yuan JK, Wu CJ, Xie YW, Wu J. Reentrance of interface superconductivity in a high-T c cuprate heterostructure. Nat Commun 2023; 14:7290. [PMID: 37949854 PMCID: PMC10638369 DOI: 10.1038/s41467-023-42903-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Accepted: 10/25/2023] [Indexed: 11/12/2023] Open
Abstract
Increasing the carrier density in a Mott insulator by chemical doping gives rise to a generic superconducting dome in high temperature superconductors. An intriguing question is whether a second superconducting dome may exist at higher dopings. Here we heavily overdope La2-xSrxCuO4 (0.45 ≤ x ≤ 1.0) and discover an unprecedented reentrance of interface superconductivity in La2-xSrxCuO4 /La2CuO4 heterostructures. As x increases, the superconductivity is weakened and completely fades away at x = 0.8; but it revives at higher doping and fully recovers at x = 1.0. This is shown to be correlated with the suppression of the interfacial charge transfer around x = 0.8 and the weak-to-strong localization crossover in the La2-xSrxCuO4 layer. We further construct a theoretical model to account for the sophisticated relation between charge localization and interfacial charge transfer. Our work advances both the search for and control of new superconducting heterostructures.
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Affiliation(s)
- J Y Shen
- School of Physics, Zhejiang University, Hangzhou, 310027, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, 310024, China
- Department of Physics, School of Science, Westlake University, Hangzhou, 310024, China
- Key Laboratory for Quantum Materials of Zhejiang Province, School of Science, Westlake University, Hangzhou, 310024, China
| | - C Y Shi
- School of Physics, Zhejiang University, Hangzhou, 310027, China
| | - Z M Pan
- Department of Physics, School of Science, Westlake University, Hangzhou, 310024, China
| | - L L Ju
- School of Physics, Zhejiang University, Hangzhou, 310027, China
| | - M D Dong
- School of Physics, Zhejiang University, Hangzhou, 310027, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, 310024, China
- Department of Physics, School of Science, Westlake University, Hangzhou, 310024, China
- Key Laboratory for Quantum Materials of Zhejiang Province, School of Science, Westlake University, Hangzhou, 310024, China
| | - G F Chen
- School of Physics, Zhejiang University, Hangzhou, 310027, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, 310024, China
- Department of Physics, School of Science, Westlake University, Hangzhou, 310024, China
- Key Laboratory for Quantum Materials of Zhejiang Province, School of Science, Westlake University, Hangzhou, 310024, China
| | - Y C Zhang
- School of Physics, Zhejiang University, Hangzhou, 310027, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, 310024, China
- Department of Physics, School of Science, Westlake University, Hangzhou, 310024, China
- Key Laboratory for Quantum Materials of Zhejiang Province, School of Science, Westlake University, Hangzhou, 310024, China
| | - J K Yuan
- Department of Physics, School of Science, Westlake University, Hangzhou, 310024, China
| | - C J Wu
- Department of Physics, School of Science, Westlake University, Hangzhou, 310024, China
- Key Laboratory for Quantum Materials of Zhejiang Province, School of Science, Westlake University, Hangzhou, 310024, China
- New Cornerstone Science Laboratory, Department of Physics, School of Science, Westlake University, 310024, Hangzhou, China
- Institute for Theoretical Sciences, Westlake University, Hangzhou, 310024, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, 310024, Zhejiang, China
| | - Y W Xie
- School of Physics, Zhejiang University, Hangzhou, 310027, China
| | - J Wu
- Research Center for Industries of the Future, Westlake University, Hangzhou, 310024, China.
- Department of Physics, School of Science, Westlake University, Hangzhou, 310024, China.
- Key Laboratory for Quantum Materials of Zhejiang Province, School of Science, Westlake University, Hangzhou, 310024, China.
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Gao RQ, Li K, Sun JH, Ma YH, Xu XY, Xie YW, Cao JY. [Establishment and validation of a preoperative nomogram model for predicting the risk of hepatocellular carcinoma with microvascular invasion]. Zhonghua Wai Ke Za Zhi 2023; 61:41-47. [PMID: 36603883 DOI: 10.3760/cma.j.cn112139-20220713-00311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Objective: To establish and validate a nomogram model for predicting the risk of microvascular invasion(MVI) in hepatocellular carcinoma. Methods: The clinical data of 210 patients with hepatocellular carcinoma who underwent hepatectomy at Department of Hepatobiliary and Pancreatic Surgery,the Affiliated Hospital of Qingdao University from January 2013 to October 2021 were retrospectively analyzed. There were 169 males and 41 females, aged(M(IQR)) 57(12)years(range:30 to 80 years). The patients were divided into model group(the first 170 cases) and validation group(the last 40 cases) according to visit time. Based on the clinical data of the model group,rank-sum test and multivariate Logistic regression analysis were used to screen out the independent related factors of MVI. R software was used to establish a nomogram model to predict the preoperative MVI risk of hepatocellular carcinoma,and the validation group data were used for external validation. Results: Based on the modeling group data,the receiver operating characteristic curve was used to determine that cut-off value of DeRitis ratio,γ-glutamyltransferase(GGT) concentration,the inverse number of activated peripheral blood T cell ratio (-aPBTLR) and the maximum tumor diameter for predicting MVI, which was 0.95((area under curve, AUC)=0.634, 95%CI: 0.549 to 0.719), 38.2 U/L(AUC=0.604, 95%CI: 0.518 to 0.689),-6.05%(AUC=0.660, 95%CI: 0.578 to 0.742),4 cm(AUC=0.618, 95%CI: 0.533 to 0.703), respectively. Univariate and multivariate Logistic regression analysis showed that DeRitis≥0.95,GGT concentration ≥38.2 U/L,-aPBTLR>-6.05% and the maximum tumor diameter ≥4 cm were independent related factors for MVI in hepatocellular carcinoma patients(all P<0.05). The nomogram prediction model based on the above four factors established by R software has good prediction efficiency. The C-index was 0.758 and 0.751 in the model group and the validation group,respectively. Decision curve analysis and clinical impact curve showed that the nomogram model had good clinical benefits. Conclusions: DeRitis ratio,serum GGT concentration,-aPBTLR and the maximum tumor diameter are valuable factors for preoperative prediction of hepatocellular carcinoma with MVI. A relatively reliable nomogram prediction model could be established on them.
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Affiliation(s)
- R Q Gao
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - K Li
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - J H Sun
- Department of Cosmetic Surgery,the Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - Y H Ma
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - X Y Xu
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - Y W Xie
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - J Y Cao
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University,Qingdao 266000,China
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Xie YW, Yu HL, Wu H, Tao XB, Wang HP, Cheng YQ, Wang CX, Zeng P, Liu BB, Zhang P, Cui XB. [Preparation of monoclonal antibodies against Pinellia ternata lectin protein and establishment of double-antibody sandwich ELISA]. Zhongguo Zhong Yao Za Zhi 2022; 47:6076-6081. [PMID: 36471932 DOI: 10.19540/j.cnki.cjcmm.20210414.302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
To determine the content of endogenous toxic substance Pinellia ternata lectin(PTL) protein in Pinelliae Rhizoma and the related processed products, this study prepared specific monoclonal antibodies against PTL by hybridoma cell technology, and established a quantitative double-antibody sandwich enzyme linked immunosorbent assay(ELISA) for PTL antigen. The detection conditions were 2.5 μg·mL~(-1) working concentration of the captured antibody and 1∶450 of the dilution multiple of detected antibody. The coating condition was staying overnight at 4 ℃. The blocking time and incubation times of antigen and detected antibody were all 90 minutes. The incubation time of horseradish peroxidase conjugated streptavidin-horseradish peroxidase(SA-HRP) was 15 minutes. The quantitative limit of the method for PTL antigen was 0.375 ng·mL~(-1). The linear range was 75.000-4 800.000 pg·mL~(-1), and R~2=0.997 1. The recovery rate was 90.0%-110.0%, and the variation coefficients of intra-test and inter-test precision were 2.0%-3.0% and 2.0%-8.5%.The content of PTL in three batches of Pinelliae Rhizoma and the related processed products was determined by the method, and the average content of PTL in Pinelliae Rhizoma was 35.42 mg·g~(-1). The average content of PTL in Pinelliae Rhizoma Praeparatum Cum Alumine, Pinelliae Rhizoma Praeparatum, and Pinelliae Rhizoma Praeparatum Cum Zingibere Et Alumine were 1.15 mg·g~(-1), 16.53 μg·g~(-1), and 122.63 ng·g~(-1), respectively, indicating that the content of PTL decreased significantly after processing. The quantitative double-antibody sandwich ELISA for PTL antigen established in this paper had good linearity, sensitive response, and high accuracy, which provided a simple and effective monitoring method for the detection of PTL content in the processing of Pinelliae Rhizoma.
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Affiliation(s)
- Yu-Wei Xie
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - Hong-Li Yu
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China Jiangsu Key Laboratory of Chinese Medicine Processing Nanjing 210023, China Engineering Center of State Ministry of Education for Standardization of Chinese Medicine Processing Nanjing 210023, China
| | - Hao Wu
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China Jiangsu Key Laboratory of Chinese Medicine Processing Nanjing 210023, China Engineering Center of State Ministry of Education for Standardization of Chinese Medicine Processing Nanjing 210023, China
| | - Xing-Bao Tao
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - He-Peng Wang
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - Yan-Qiu Cheng
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - Cai-Xia Wang
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - Ping Zeng
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - Bing-Bing Liu
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - Ping Zhang
- National Institutes for Food and Drug Control Beijing 100050, China
| | - Xiao-Bing Cui
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
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Cheng YQ, Yu HL, Wu H, Tao XB, Xie YW, Chen SJ, Zhang P, Li S, Wang CX, Wang HP, Zeng P, Liu BB. [Irritant toxicity and lectin content of different processed products of Pinelliae Rhizoma]. Zhongguo Zhong Yao Za Zhi 2022; 47:4627-4633. [PMID: 36164868 DOI: 10.19540/j.cnki.cjcmm.20211207.301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The present study aims to investigate the correlation between irritant toxicity variation and lectin content variation during the processing of Pinelliae Rhizoma products and to explore the feasibility of Western blot as a method for the detection of lectin. We processed Pinelliae Rhizoma Praeparatum Cum Alumine, Pinelliae Rhizoma Praeparatum, and Pinelliae Rhizoma Praeparatumcum Zingibere et Alumine to different degrees and then analyzed their irritant toxicity via Draize rabbit eye test. Western blot was employed to determine the lectin content in Pinelliae Rhizoma products processed with different methods. The correlation between toxicity variation and lectin content variation was then analyzed. Different decoction pieces of Pinelliae Rhizoma were collected for the determination of lectin content. The three processed products of Pinelliae Rhizoma showed gradually decreased toxicity and lectin content as the processing continued. The decreasing trend of lectin content was consistent with that of irritant toxicity during processing, which indicated that the change in lectin content could reflect the trend of irritant toxicity. No band of lectin appeared in the Western blot of processed products of Pinelliae Rhizoma, which suggested that western blotting can be used for the detection of toxic lectin in the processed products of Pinelliae Rhizoma. Lectin should not be detected in the Pinelliae Rhizoma products processed according to the methods in the Chinese Pharmacopoeia.
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Affiliation(s)
- Yan-Qiu Cheng
- Pharmacology College, Nanjing University of Chinese Medicine Nanjing 210023,China
| | - Hong-Li Yu
- Pharmacology College, Nanjing University of Chinese Medicine Nanjing 210023,China Jiangsu Key Laboratory of Chinese Medicine Processing Nanjing 210023,China Engineering Center of State Ministry of Education for Standardization of Chinese Medicine Processing Nanjing 210023,China
| | - Hao Wu
- Pharmacology College, Nanjing University of Chinese Medicine Nanjing 210023,China Jiangsu Key Laboratory of Chinese Medicine Processing Nanjing 210023,China Engineering Center of State Ministry of Education for Standardization of Chinese Medicine Processing Nanjing 210023,China
| | - Xing-Bao Tao
- Pharmacology College, Nanjing University of Chinese Medicine Nanjing 210023,China
| | - Yu-Wei Xie
- Pharmacology College, Nanjing University of Chinese Medicine Nanjing 210023,China
| | - Sheng-Jun Chen
- Jiangyin Tianjiang Pharmaceutical Co.,Ltd. Jiangyin 214400,China
| | - Ping Zhang
- National Institutes for Food and Drug Control Beijing 100050,China
| | - Song Li
- Jiangyin Tianjiang Pharmaceutical Co.,Ltd. Jiangyin 214400,China
| | - Cai-Xia Wang
- Pharmacology College, Nanjing University of Chinese Medicine Nanjing 210023,China
| | - He-Peng Wang
- Pharmacology College, Nanjing University of Chinese Medicine Nanjing 210023,China
| | - Ping Zeng
- Pharmacology College, Nanjing University of Chinese Medicine Nanjing 210023,China
| | - Bing-Bing Liu
- Pharmacology College, Nanjing University of Chinese Medicine Nanjing 210023,China
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Wang CX, Yu HL, Wu H, Tao XB, Xie YW, Cheng YQ, Zeng P, Wang HP, Zhang P, Cui XB. [Anti-ascites effect of total saponins of Phytolaccae Radix on mice with ascites and mechanism]. Zhongguo Zhong Yao Za Zhi 2022; 47:4411-4417. [PMID: 36046870 DOI: 10.19540/j.cnki.cjcmm.20220211.402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
This study investigated the anti-ascites effect of the total saponins of Phytolaccae Radix(PRTS) and the mechanism.H22 cell suspension was used(ip) to induce ascites in ICR male mice, and the model mice were randomized into model group, positive drug group(furosemide, 6 mg·kg~(-1)), total extract of Phytolaccae Radix(PRTE) group, and PRTS(1.29 g·kg~(-1)).Another 10 male mice were selected as the blank group.Mice in the blank group and model group were given(ig) normal saline containing 0.5% CMC-Na, and those in the positive drug group, PRTE group, and PRTS group received(ig) corresponding doses of drugs, once a day, for 8 consecutive days.The ascites volume, urine volume, and fecal water content in mice with ascites, serum levels of antidiure-tic hormone(ADH), renin in renin-angiotensin-aldosterone system(RAAS), angiotensin Ⅱ(AngⅡ), and aldosterone(ALD), expression of aquaporin(AQP)1-AQP4 in kidney, expression of AQP1, AQP3 in colon, and expression of phosphatidylinositol 3-kinase/protein kinase B(PI3 K/Akt) pathway-related proteins were detected to explore the anti-ascites mechanism of PRTS.The results showed that the PRTS can increase the urine volume and fecal water content and decrease the ascites volume of ascites mice.Moreover, PRTS significantly reduced the expression of AQP1-AQP4 in kidney and AQP1, AQP3 in colon, serum levels of renin, AngⅡ, ALD, and ADH, and the expression of p-PI3 K and p-Akt in the kidney of ascites mice.PRTS exerts anti-ascites effect by promoting urination and defecation.The mechanism is that it inhibits the activities of RAAS and ADH and suppresses the phosphorylation of PI3 K/Akt signaling pathway, thereby restricting the expression of AQPs in the kidney and colon.
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Affiliation(s)
- Cai-Xia Wang
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - Hong-Li Yu
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China Jiangsu Key Laboratory of Chinese Medicine Processing Nanjing 210023, China Engineering Center of State Ministry of Education for Standardization of Chinese Medicine Processing Nanjing 210023, China
| | - Hao Wu
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China Jiangsu Key Laboratory of Chinese Medicine Processing Nanjing 210023, China Engineering Center of State Ministry of Education for Standardization of Chinese Medicine Processing Nanjing 210023, China
| | - Xing-Bao Tao
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - Yu-Wei Xie
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - Yan-Qiu Cheng
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - Ping Zeng
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - He-Peng Wang
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
| | - Ping Zhang
- National Institutes for Food and Drug Control Beijing 100050, China
| | - Xiao-Bing Cui
- School of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023, China
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Du K, Zhang M, Dai C, Zhou ZN, Xie YW, Ren ZH, Tian H, Chen LQ, Van Tendeloo G, Zhang Z. Manipulating topological transformations of polar structures through real-time observation of the dynamic polarization evolution. Nat Commun 2019; 10:4864. [PMID: 31653843 PMCID: PMC6814840 DOI: 10.1038/s41467-019-12864-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 09/30/2019] [Indexed: 12/01/2022] Open
Abstract
Topological structures based on controllable ferroelectric or ferromagnetic domain configurations offer the opportunity to develop microelectronic devices such as high-density memories. Despite the increasing experimental and theoretical insights into various domain structures (such as polar spirals, polar wave, polar vortex) over the past decade, manipulating the topological transformations of polar structures and comprehensively understanding its underlying mechanism remains lacking. By conducting an in-situ non-contact bias technique, here we systematically investigate the real-time topological transformations of polar structures in PbTiO3/SrTiO3 multilayers at an atomic level. The procedure of vortex pair splitting and the transformation from polar vortex to polar wave and out-of-plane polarization are observed step by step. Furthermore, the redistribution of charge in various topological structures has been demonstrated under an external bias. This provides new insights for the symbiosis of polar and charge and offers an opportunity for a new generation of microelectronic devices. Direct observation of the dynamic evolution of polar domain structures at atomic level remains challenging. Here, the authors report the observation of real-time topological transformations of polar structures in PbTiO3/SrTiO3 multilayers.
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Affiliation(s)
- K Du
- Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - M Zhang
- Department of Physics, Zhejiang University, Hangzhou, 310027, China
| | - C Dai
- Department of Materials Science and Engineering, Pennsylvania State University, State College, PA, 16802, USA
| | - Z N Zhou
- Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Y W Xie
- Department of Physics, Zhejiang University, Hangzhou, 310027, China
| | - Z H Ren
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - H Tian
- Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China. .,State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
| | - L Q Chen
- Department of Materials Science and Engineering, Pennsylvania State University, State College, PA, 16802, USA
| | - Gustaaf Van Tendeloo
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium.,Nanostructure Research Centre (NRC) Wuhan University of Technology, Wuhan, 430070, China
| | - Z Zhang
- Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China. .,State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
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Sung HL, Her TM, Chen CY, Xie YW, Chang YC. Barium–phosphonate coordination layers: Syntheses, crystal structures, and luminescent properties. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2018.09.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Gao Y, Xie YW, Zhang Q, Wang AL, Yu YX, Yang LY. Intensified nitrate and phosphorus removal in an electrolysis -integrated horizontal subsurface-flow constructed wetland. Water Res 2017; 108:39-45. [PMID: 27863737 DOI: 10.1016/j.watres.2016.10.033] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [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: 05/10/2016] [Revised: 08/10/2016] [Accepted: 10/13/2016] [Indexed: 06/06/2023]
Abstract
A novel electrolysis-integrated horizontal subsurface-flow constructed wetland system (E-HFCWs) was developed for intensified removal of nitrogen and phosphorus contaminated water. The dynamics of nitrogen and phosphorus removal and that of main water qualities of inflow and outflow were also evaluated. The hydraulic retention time (HRT) greatly enhanced nitrate removal when the electrolysis current intensity was stabilized at 0.07 mA/cm2. When the HRT ranged from 2 h to 12 h, the removal rate of nitrate increased from 20% to 84%. Phosphorus (P) removal was also greatly enhanced-exceeding 90% when the HRT was longer than 4 h in the electrolysis-integrated HFCWs. This improved P removal is due to the in-situ formation of ferric ions by anodizing of sacrificial iron anodes, causing chemical precipitation, physical adsorption and flocculation of phosphorus. Thus, electrolysis plays an important role in nitrate and phosphorus removal. The diversity and communities of bacteria in the biofilm of substrate was established by the analysis of 16S rDNA gene sequences, and the biofilm was abundant with Comamonadaceae and Xanthomonadaceae bacteria in E-HFCWs. Test results illustrated that the electrolysis integrated with horizontal subsurface-flow constructed wetland is a feasible and effective technology for intensified nitrogen and phosphorus removal.
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Affiliation(s)
- Y Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - Y W Xie
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - Q Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - A L Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - Y X Yu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - L Y Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China.
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Wang JZ, Bai YS, Wu Y, Zhang S, Chen TH, Peng SC, Xie YW, Zhang XW. Occurrence, compositional distribution, and toxicity assessment of pyrethroid insecticides in sediments from the fluvial systems of Chaohu Lake, Eastern China. Environ Sci Pollut Res Int 2016; 23:10406-10414. [PMID: 26606936 DOI: 10.1007/s11356-015-5831-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 06/29/2015] [Accepted: 11/17/2015] [Indexed: 06/05/2023]
Abstract
Surface sediment-associated synthetic pyrethroid insecticides (SPs) are known to pose high risks to the benthic organisms in Chaohu Lake, a shallow lake of Eastern China. However, the pollution status of the lake's tributaries and estuaries is still unknown. The present study was conducted to investigate the occurrence, compositional distribution, and toxicity of 12 currently used SPs in the surface sediments from four important tributaries, as well as in the sediment cores at their estuaries, using GC-MS for quantification. All SPs selected were detectable, with cypermethrin, es/fenvalerate, and permethrin dominant in both surface and core sediments, suggesting that these compounds were extensively applied. Urban samples contained the highest summed concentrations of the 12 SPs analyzed (Σ12SP) in both surface and core sediments compared with rural samples, suggesting that urban areas near aquatic environments posed high risks for SPs. The mean concentration of Σ12SP in surface sediments of each river was generally higher than that found in core sediments from its corresponding estuary, perhaps implying recent increases in SP usage. Surface sediments were significantly dominated by cypermethrin and permethrin, whereas core sediments were dominated by permethrin and es/fenvalerate. The compositional distributions demonstrated a spatial variation for surface sediments because urban sediments generally contained greater percentages of permethrin and cypermethrin, but rural sediments had significant levels of es/fenvalerate and cypermethrin. In all sediment cores, the percentage of permethrin gradually increased, whereas es/fenvalerate tended to decrease, from the bottom sediments to the top, indicating that the former represented fresh input, whereas the latter represented historical residue. Most urban samples would be expected to be highly toxic to benthic organisms due to the residue of SPs based on a calculation of toxic units (TUs) using toxicity data of the amphipod Hyalella azteca. However, low TU values were found for the samples from rural areas. These results indicate that the bottom sediments were exposed to high risk largely by the residual SPs from urban areas. The summed TUs were mostly attributable to cypermethrin, followed by λ-cyhalothrin and es/fenvalerate. Despite permethrin contributing ∼28.7 % of the Σ12SP concentration, it only represented 6.34 % of the summed TUs. Therefore, our results suggest that high levels of urbanization can increase the accumulation of SPs in aquatic environments.
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Affiliation(s)
- Ji-Zhong Wang
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
- Laboratory for Nanomineralogy and Environmental Material, Hefei University of Technology, Hefei, 230009, China.
| | - Ya-Shu Bai
- Third Institute of Oceanography, State Oceanic Administration of the People's Republic of China, Xiamen, 361008, Fujian, China
| | - Yakton Wu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China
- Laboratory for Nanomineralogy and Environmental Material, Hefei University of Technology, Hefei, 230009, China
| | - Shuo Zhang
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China
- Laboratory for Nanomineralogy and Environmental Material, Hefei University of Technology, Hefei, 230009, China
| | - Tian-Hu Chen
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China
- Laboratory for Nanomineralogy and Environmental Material, Hefei University of Technology, Hefei, 230009, China
| | - Shu-Chuan Peng
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China
- Laboratory for Nanomineralogy and Environmental Material, Hefei University of Technology, Hefei, 230009, China
| | - Yu-Wei Xie
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Xiao-Wei Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
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10
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Gao Y, Xie YW, Zhang Q, Yu YX, Yang LY. High performance of nitrogen and phosphorus removal in an electrolysis-integrated biofilter. Water Sci Technol 2016; 74:714-721. [PMID: 27508376 DOI: 10.2166/wst.2016.190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A novel electrolysis-integrated biofilter system was developed in this study to evaluate the intensified removal of nitrogen and phosphorus from contaminated water. Two laboratory-scale biofilter systems were established, one with electrolysis (E-BF) and one without electrolysis (BF) as control. The dynamics of intensified nitrogen and phosphorus removal and the changes of inflow and outflow water qualities were also evaluated. The total nitrogen (TN) removal rate was 94.4% in our newly developed E-BF, but only 74.7% in the control BF. Ammonium removal rate was up to 95% in biofilters with or without electrolysis integration with an influent ammonium concentration of 40 mg/L, and the accumulation of nitrate and nitrite was much lower in the effluent of E-BF than that of BF. Thus electrolysis plays an important role in TN removal especially the nitrate and nitrite removal. Phosphorus removal was significantly enhanced, exceeding 90% in E-BF by chemical precipitation, physical adsorption, and flocculation of phosphorus because of the in situ formation of ferric ions by the anodizing of sacrificial iron anodes. Results from this study indicate that the electrolysis integrated biofilter is a promising solution for intensified nitrogen and phosphorus removal.
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Affiliation(s)
- Y Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China E-mail:
| | - Y W Xie
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China E-mail:
| | - Q Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China E-mail:
| | - Y X Yu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China E-mail:
| | - L Y Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China E-mail:
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11
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Lee JS, Xie YW, Sato HK, Bell C, Hikita Y, Hwang HY, Kao CC. Titanium dxy ferromagnetism at the LaAlO3/SrTiO3 interface. Nat Mater 2013; 12:703-706. [PMID: 23727948 DOI: 10.1038/nmat3674] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 04/29/2013] [Indexed: 06/02/2023]
Abstract
A number of recent transport and magnetization studies have shown signs of ferromagnetism in the LaAlO3/SrTiO3 heterostructure, an unexpected property with no bulk analogue in the constituent materials. However, no experiment thus far has provided direct information on the host of the magnetism. Here we report spectroscopic investigations of the magnetism using element-specific techniques, including X-ray magnetic circular dichroism and X-ray absorption spectroscopy, along with corresponding model calculations. We find direct evidence for in-plane ferromagnetic order at the interface, with Ti(3+) character in the dxy orbital of the anisotropic t2g band. These findings establish a striking example of emergent phenomena at oxide interfaces.
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Affiliation(s)
- J-S Lee
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
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12
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Li D, Xie YW, Xue XP, Bai XF, Jia ZS. [Forecasting of hepatitis C virus CTL epitopes and design of multi-epitopes vaccine]. Zhonghua Gan Zang Bing Za Zhi 2009; 17:786-787. [PMID: 19874698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- Duan Li
- Center of Diagnosis and Treatment for Infectious Diseases of Chinese PLA, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
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13
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Abstract
Methanolic extract and two purified compounds (brazilin and hematoxylin) from Caesalpinia sappan were examined for their relaxant effects in isolated rat thoracic aorta. The methanolic extract significantly and dose-dependently relaxed the alpha1-receptor agonist phenylephrine-precontracted aortic rings, without affecting passive tension of these vessels. Removal of the vascular endothelium, inhibition of nitric oxide (NO) synthase with 0.1 mM Nomega-nitro-L-arginine and of cGMP biosynthesis with 10 microM methylene blue abolished the vasorelaxant effects of the herbal extract at doses up to 30 microg/ml. Similar vasorelaxant effects were observed with brazilin and hematoxylin. Therefore, these results suggest that brazilin and hematoxylin may be responsible for the vascular relaxant effects of C. sappan, via endogenous NO and subsequent cGMP formation. The vascular relaxant effects of the plant may contribute to its therapeutic actions.
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MESH Headings
- Animals
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/enzymology
- Benzopyrans/pharmacology
- Drugs, Chinese Herbal/chemistry
- Drugs, Chinese Herbal/isolation & purification
- Drugs, Chinese Herbal/pharmacology
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/enzymology
- Fabaceae/chemistry
- Fabaceae/therapeutic use
- Hematoxylin/pharmacology
- In Vitro Techniques
- Male
- Muscle Contraction/drug effects
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/enzymology
- Nitric Oxide Synthase/metabolism
- Nitric Oxide Synthase Type III
- Phytotherapy
- Plants, Medicinal
- Rats
- Rats, Sprague-Dawley
- Vasodilator Agents/chemistry
- Vasodilator Agents/isolation & purification
- Vasodilator Agents/pharmacology
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Affiliation(s)
- Y W Xie
- lnstitute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, People's Republic of China
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14
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Abstract
Nitric oxide originating from the microvascular endothelium and other tissue sources appears to play an important physiological role in the regulation of mitochondrial respiration in vivo. Physiological processes and pathophysiological conditions that influence the production and action of nitric oxide are likely to alter the control of tissue respiration by nitric oxide. Oxidant stress associated with the production of peroxynitrite from nitric oxide, under conditions such as hypoxia-reoxygenation, convert the reversible inhibition of respiration by nitric oxide into an irreversible process, which is potentially an important contributor to the expression of alterations in physiological function and tissue injury.
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Affiliation(s)
- M S Wolin
- Department of Physiology, New York Medical College, Valhalla 10595, USA.
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15
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Xie YW, Kaminski PM, Wolin MS. Inhibition of rat cardiac muscle contraction and mitochondrial respiration by endogenous peroxynitrite formation during posthypoxic reoxygenation. Circ Res 1998; 82:891-7. [PMID: 9576108 DOI: 10.1161/01.res.82.8.891] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This study was designed to investigate the potential role of endogenous peroxynitrite (ONOO-) formation in the inhibition of cardiac muscle contractility and mitochondrial respiration during posthypoxic reoxygenation. Isometric contraction of isolated rat left ventricular posterior papillary muscle was virtually eliminated at the end of an exposure to 15 minutes of hypoxia and remained 40+/-5% depressed an hour after the reintroduction of O2. O2 uptake by rat left ventricular cardiac muscle, measured by a Clark-type O2 electrode, was also inhibited by 24+/-2% at 10 minutes after reoxygenation. The inhibition of contractility and respiration during posthypoxic reoxygenation was markedly attenuated by the NO synthase inhibitor nitro-L-arginine, exogenous superoxide dismutase, and the ONOO- scavenger urate but not by the hydroxyl radical scavenger mannitol. Generation of ONOO- with the NO donor S-nitroso-N-acetylpenicillamine (SNAP) plus the superoxide-releasing agent pyrogallol caused an irreversible inhibition of cardiac contractile and respiratory function. Unlike ONOO-, exogenous (SNAP) and endogenous (bradykinin) sources of NO inhibited contractility in a reversible manner. Under conditions of comparable amounts of respiratory inhibition in unstimulated incubated muscle, the NO-dependent agents and the mitochondrial antagonist NaCN produced a smaller degree of suppression of contractility compared with ONOO- and posthypoxic reoxygenation. These results are consistent with a contributing role for endogenous ONOO- formation in the inhibition of cardiac muscle contractility and mitochondrial respiration during posthypoxic reoxygenation.
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Affiliation(s)
- Y W Xie
- Department of Physiology, New York Medical College, Valhalla 10595, USA
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16
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Wolin MS, Hintze TH, Shen W, Mohazzab-H KM, Xie YW. Involvement of reactive oxygen and nitrogen species in signalling mechanisms that control tissue respiration in muscle. Biochem Soc Trans 1997; 25:934-9. [PMID: 9388576 DOI: 10.1042/bst0250934] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- M S Wolin
- Department of Physiology, New York Medical College, Valhalla 10595, USA
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Abstract
BACKGROUND ACE inhibitors potentiate kinin-nitric oxide (NO)-dependent coronary vascular dilation, and NO can modulate myocardial oxygen consumption. Whether ACE inhibitors also affect myocardial O2 consumption has not been established. METHODS AND RESULTS Production of nitrite, a metabolite of NO in aqueous solution, in coronary microvessels and O2 consumption in myocardium were quantified with the use of in vitro tissue preparations, the Greiss reaction, and a Clark-type O2 electrode. In coronary microvessels, kininogen (the precursor of kinin; 10 micrograms/mL) and three ACE inhibitors (captopril, enalaprilat, or ramiprilat; 10(-8) mol/L) increased nitrite production from 76 +/- 6 to 173 +/- 15, 123 +/- 12, 125 +/- 12, and 153 +/- 12 pmol/mg, respectively (all P < .05). In myocardium, kininogen (10 micrograms/mL) and captopril, enalaprilat, or ramiprilat (10(-4) mol/L) reduced cardiac O2 consumption by 41 +/- 2%, 19 +/- 3%, 25 +/- 2%, and 35 +/- 2%, respectively. The changes in both nitrite release and O2 consumption in vitro were blocked by N omega-nitro-L-arginine methyl ester or N omega-nitro-L-arginine, inhibitors of endogenous NO formation. The effects were also blocked by HOE 140, which blocks the bradykinin B2-kinin receptor, and serine protease inhibitors, which inhibit local kinin formation. CONCLUSIONS Our data indicate that stimulation of local kinin formation by use of a precursor for kinin formation or inhibition of kinin degradation by use of ACE inhibitors increases NO formation and is important in the control of cardiac O2 consumption. Vasodilation and control of myocardial O2 consumption by NO may contribute importantly to the therapeutic actions of ACE inhibitors in cardiac disease states.
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Affiliation(s)
- X Zhang
- Department of Physiology, New York Medical College, Valhalla 10595, USA
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18
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Xie YW, Wolin MS. Role of nitric oxide and its interaction with superoxide in the suppression of cardiac muscle mitochondrial respiration. Involvement in response to hypoxia/reoxygenation. Circulation 1996; 94:2580-6. [PMID: 8921804 DOI: 10.1161/01.cir.94.10.2580] [Citation(s) in RCA: 107] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Nitric oxide (NO); superoxide anion (O2.d-); the reaction product of NO with O2.d-, peroxynitrite (ONOO-); and ischemia/reperfusion have all been reported to inhibit respiration in isolated mitochondria. However, the specific species involved in the inhibition of respiration in intact tissues are poorly understood. METHODS AND RESULTS O2 consumption in isolated cardiac muscle from bovine calf hearts was quantified by use of a Clark-type electrode. Exogenous and endogenous sources of NO, from S-nitroso-N-acetylpenicillamine (SNAP) and bradykinin or carbachol, reversibly inhibited respiration, whereas the O2.- releasing agent, pyrogallol (PG), inhibited respiration in a manner that was only partially reversed when examined 15 minutes after the removal of PG. The generation of ONOO- with SNAP + PG caused a potentiation of the O2(-)-elicited inhibition of respiration when examined 15 minutes after the removal of the ONOO- generating system. Tiron (a scavenger of O2.-) did not alter the actions of SNAP, but it attenuated the direct inhibitory effects of PG +/- SNAP and essentially eliminated the suppression of respiration observed 15 minutes after removal of the O2.- or ONOO- generating system. Urate (a scavenger of ONOO-) antagonized only the actions of PG + SNAP. After exposure of muscle slices to a model of hypoxia (15 minutes) and reoxygenation (10 minutes), respiratory inhibition was observed. This reoxygenation-induced inhibition was potentiated by L-arginine, the substrate for NO biosynthesis, and was markedly blocked by nitro-L-arginine (an NO synthase inhibitor), Tiron, or urate. CONCLUSIONS The potentially physiological reversible regulation of respiration in cardiac muscle by NO is converted to an effect that does not show rapid reversibility under conditions in which ONOO- forms, and this could contribute to cardiac dysfunction in situations such as hypoxia/reoxygenation.
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Affiliation(s)
- Y W Xie
- Department of Physiology, New York Medical College, Valhalla 10595, USA
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19
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Xie YW, Shen W, Zhao G, Xu X, Wolin MS, Hintze TH. Role of endothelium-derived nitric oxide in the modulation of canine myocardial mitochondrial respiration in vitro. Implications for the development of heart failure. Circ Res 1996; 79:381-7. [PMID: 8781471 DOI: 10.1161/01.res.79.3.381] [Citation(s) in RCA: 144] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The mechanism responsible for the regulation of cardiac function by endogenous nitric oxide (NO) remains unclear. In this investigation, O2 consumption by freshly isolated myocardial muscle segments from the left ventricular free wall of canine hearts was quantified by a Clark-type O2 electrode at 37 degrees C. S-nitroso-N-acetylpenicillamine (SNAP, 9 +/- 3% to 50 +/- 8%), bradykinin (BK, 14 +/- 3% to 30 +/- 5%), or carbachol (CCh, 15 +/- 4% to 29 +/- 4%) significantly attenuated tissue O2 consumption at doses of 10(-7) to 10(-4) mol/L (mean +/- SE, P < .05). The effects of BK and CCh, but not SNAP, were blocked by 10(-4) mol/L NG-nitro-L-arginine, consistent with both BK and CCh stimulating NO biosynthesis and with SNAP decomposing to release NO, respectively. Similar doses of 8-Br-cGMP caused a respiratory inhibition, but to a lesser extent (9 +/- 2% to 14 +/- 6%). A mitochondrial uncoupler, 2,4-dinitrophenol (at 1 mmol/L), blocked the effects of 8-Br-cGMP, but not those of SNAP, BK, or CCh, suggesting that the major site of action of NO is on mitochondrial electron transport. Myocardial muscle from dogs with pacing-induced heart failure had a basal O2 consumption rate of 251 +/- 21 nmol.min-1.g-1, which was 54% higher than the rate seen in muscle from normal healthy canine hearts. The inhibitory effects of BK and CCh on O2 consumption were not observed in failing cardiac tissue, but SNAP showed an unaltered inhibitory effect. Therefore, our results indicate that NO released from microvascular endothelium by BK, stimulation of muscarinic receptors, and perhaps flow velocity may play an important physiological role in the control of cardiac mitochondrial respiration, and the loss of this regulatory function may contribute to the development of heart failure.
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Affiliation(s)
- Y W Xie
- Department of Physiology, New York Medical College, Valhalla 10595, USA
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