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Xiong T, Zhang T, Xian Y, Kang Z, Zhang S, Dumat C, Shahid M, Li S. Foliar uptake, biotransformation, and impact of CuO nanoparticles in Lactuca sativa L. var. ramosa Hort. Environ Geochem Health 2021; 43:423-439. [PMID: 32990874 DOI: 10.1007/s10653-020-00734-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 09/21/2020] [Indexed: 06/11/2023]
Abstract
Plant leaves can intercept and directly absorb nanoparticles (NPs) that deposit on their surface, which can lead severe phytotoxicity. However, there is a large blind spot when it comes to the fate and phytotoxicity of NPs after leaf exposure, even though foliar uptake is likely to occur. In this study, lettuce leaves (Lactuca sativa L. var. ramosa Hort.) were exposed to different concentrations of copper-oxide NPs (CuO-NPs, 0, 100, and 1000 mg L-1) for 5, 10, and 15 days. Foliar uptake, subcellular distribution, chemical forms, and impact of CuO-NPs on nutrient status, antioxidant systems, and lettuce growth were examined. Substantially elevated Cu levels were observed in lettuce leaves (up to 6350 mg kg-1), which was one magnitude greater than that in the roots (up to 525 mg kg-1). Cu translocation factors from leaves to roots ranged from 1.80 to 15.6%. The application of CuO-NPs severely inhibited lettuce growth and altered the nutrient status in plants (especially Mn, K, and Ca). Moreover, CuO-NPs increased H2O2 generation, malonaldehyde level (on the 5th and 10th day of exposure), and catalase activity (on the 15th day of exposure) in lettuce leaves. The Cu concentrations in subcellular fractions were ranked: cell wall ≈ organelles > soluble fraction in lettuce leaves, and organelles > cell wall > soluble fraction in lettuce roots. Undissolved Cu forms were predominant in lettuce, which may have helped to reduce the Cu's mobility and phytotoxicity in the plant. The findings of this study will be of great interest in areas with high levels of metal-NPs in the atmosphere.
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Affiliation(s)
- Tiantian Xiong
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, 510631, China
| | - Ting Zhang
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, 510631, China
| | - Yuanhong Xian
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, 510631, China
| | - Zhuangzhuang Kang
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, 510631, China
| | - Shasha Zhang
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, 510631, China
| | - Camille Dumat
- Centre d'Etude et de Recherche Travail Organisation Pouvoir (CERTOP), UMR5044, Université Toulouse-Jean Jaurès, 5 allée Antonio Machado, 31058, Toulouse Cedex 9, France
- INP-ENSAT, Université de Toulouse, Avenue de l'Agrobiopole, 31326, Auzeville-Tolosane, France
| | - Muhammad Shahid
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehari, 61100, Pakistan
| | - Shaoshan Li
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, 510631, China.
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Loo S, Li H, Xian Y, Tsui J, Tusi S, Lin Z. 313 An oral decaherb formula suppressed Th2 inflammation and improved gut microbiota profile with 16S rRNA sequencing in mice model with atopic dermatitis. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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3
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Xiong T, Zhang T, Dumat C, Sobanska S, Dappe V, Shahid M, Xian Y, Li X, Li S. Airborne foliar transfer of particular metals in Lactuca sativa L.: translocation, phytotoxicity, and bioaccessibility. Environ Sci Pollut Res Int 2019; 26:20064-20078. [PMID: 30178413 DOI: 10.1007/s11356-018-3084-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 08/27/2018] [Indexed: 05/24/2023]
Abstract
The uptake, translocation, and human bioaccessibility of metals originating from atmospheric fine particulate matters (PM) after foliar exposure is not well understood. Lettuce (Lactuca sativa L.) plants were exposed to micronic PbO, CuO, and CdO particulate matters (PMs) by the foliar pathway and mature plants (6 weeks old) were analyzed in terms of: (1) metal accumulation and localization on plant leaf surface, and metal translocation factor (TF) and global enrichment factor (GEF) in the plants; (2) shoot growth, plant dry weight (DW), net photosynthesis (Pn), stomatal conductance (Gs), and fatty acid ratio; (3) metal bioaccessibility in the plants and soil; and (4) the hazard quotient (HQ) associated with consumption of contaminated plants. Substantial levels of metals were observed in the directly exposed edible leaves and newly formed leaves of lettuce, highlighting both the possible metal transfers throughout the plant and the potential for human exposure after plant ingestion. No significant changes were observed in plant biomass after exposure to PbO, CuO, and CdO-PMs. The Gs and fatty acid ratio were increased in leaves after metal exposure. A dilution effect after foliar uptake was suggested which could alleviate metal phytotoxicity to some degree. However, plant shoot growth and Pn were inhibited when the plants are exposed to PbO, and necrosis enriched with Cd was observed on the leaf surface. Gastric bioaccessibility of plant leaves is ranked: Cd > Cu > Pb. Our results highlight a serious health risk of PbO, CuO, and CdO-PMs associated with consumption of vegetables exposed to these metals, even in newly formed leaves in the case of PbO and CdO exposure. Finally, the study highlights the fate and toxicity of metal rich-PMs, especially in the highly populated urban areas which are increasingly cultivated to promote local food.
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Affiliation(s)
- Tiantian Xiong
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, 510631, China.
| | - Ting Zhang
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, 510631, China
| | - Camille Dumat
- Certop UMR5044, Université de Toulouse, 5 allée Antonio Machado, 31058, Toulouse Cedex 9, France
- INP-ENSAT, Université de Toulouse, Av. Agrobiopole, 31326, Castanet-Tolosan, France
- Association Réseau-Agriville (http://reseau-agriville.com/), Toulouse, France
| | - Sophie Sobanska
- Insitut of Molecular Sciences, (UMR CNRS 5255), University of Bordeaux, 351 cours de la liberation, 33405, Talence, France
| | - Vincent Dappe
- LASIR UMR 8516, Bât C5, University of Lille, 59655 Villeneuve d'Ascq, Lille, France
| | - Muhammad Shahid
- Department of Environmental Sciences, COMSATS Institute of Information Technology, Vehari, 61100, Pakistan
| | - Yuanhong Xian
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, 510631, China
| | - Xintong Li
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, 510631, China
| | - Shaoshan Li
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, 510631, China.
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Abstract
We examine the combined effects of a Kekulé coupling texture (KC) and a Dzyaloshinskii-Moriya interaction (DMI) in a two-dimensional ferromagnetic honeycomb lattice. By analyzing the gap closing conditions and the inversions of the bulk bands, we identify the parameter range in which the system behaves as a trivial or a nontrivial topological magnon insulator. We find four topological phases in terms of the KC parameter and the DMI strength. We present the bulk-edge correspondence for the magnons in a honeycomb lattice with an armchair or a zigzag boundary. Furthermore, we find Tamm-like edge states due to the intrinsic on-site interactions along the boundary sites. Our results may have significant implications to magnon transport properties in the 2D magnets at low temperatures.
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Affiliation(s)
- Pierre A Pantaleón
- School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom
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Kaufman B, O’Brien E, Stearns S, Xian Y, Matsouaka R, Holmes G, Weinberger M, Taylor D. SHARED SAVINGS ACOS AND PALLIATIVE CARE FOR ISCHEMIC STROKE PATIENTS: FINDINGS FROM GET WITH THE GUIDELINES-STROKE. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- B Kaufman
- University of North Carolina at Chapel Hill
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Zhao XY, Li JX, Tang XF, Xian Y, Xu JJ, Song Y, Chen J, Song L, Gao LJ, Gao Z, Qiao SB, Yang YJ, Gao RL, Xu B, Yuan JQ. P6420Evaluation the predictive value of PARIS score for long-term out-of-hospital events after percutaneous coronary interventions. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- X Y Zhao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - J X Li
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Depm, of Epidemiology, Beijing, China People's Republic of
| | - X F Tang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - Y Xian
- Duke Clinical Research Institute, Durham, United States of America
| | - J J Xu
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - Y Song
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - J Chen
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - L Song
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - L J Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - Z Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - S B Qiao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - Y J Yang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - R L Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - B Xu
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
| | - J Q Yuan
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary Heart Disease Center, Beijing, China People's Republic of
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Zhao XY, Li JX, Tang XF, Xian Y, Xu JJ, Song Y, Chen J, Song L, Gao LJ, Gao Z, Qiao SB, Yang YJ, Gao RL, Xu B, Yuan JQ. P6419Prognostic value of the GRACE discharge score for long-term death in patients with stable coronary artery disease after percutaneous coronary intervention. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- X Y Zhao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - J X Li
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Department of Epidemiology, Beijing, China People's Republic of
| | - X F Tang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - Y Xian
- Duke Clinical Research Institute, Durham, United States of America
| | - J J Xu
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - Y Song
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - J Chen
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - L Song
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - L J Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - Z Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - S B Qiao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - Y J Yang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - R L Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - B Xu
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
| | - J Q Yuan
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Coronary heart disease center, Beijing, China People's Republic of
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Xian Y, Li B, Pan P, Wang Y, Pei X, Yang Y. Role of Autophagy in Ovarian Cryopreservation by Vitrification. Cryo Letters 2018; 39:201-210. [PMID: 30059567] [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: 06/08/2023]
Abstract
BACKGROUND Ovarian cryopreservation by vitrification and transplantation are useful methods to recover female fertility after radiotherapy and chemotherapy. As type II programmed cell death, autophagy plays important roles in ovarian follicle development, ovarian follicle atresia and anti-stress injury. OBJECTIVE The potential role of autophagy in ovarian vitrification was investigated. MATERIALS AND METHODS Mouse ovaries were cryopreserved by vitrification, and autophagy was treated, after which the ovarian histology was checked, and ovarian follicles were counted. The apoptotic rate was detected by TUNEL, and apoptotic molecular marker cleaved caspase-3 was checked by immunofluorescence and western blot analysis. RESULTS Our results suggested that autophagy was increased in the process of vitrification compared with the fresh ovaries (p<0.05). The number of primordial follicles was decreased through inhibiting or over-activating the autophagy by autophagy inhibitor or activator (p<0.05). However, the number of primary follicles, antral follicles and atretic follicles was not significantly different compared with vitrified/warmed groups. The apoptotic rate was significantly increased in the vitrified/warmed, autophagy-inhibiting and over-activating groups compared with the fresh group (p<0.05), and this result was further confirmed by western blot analysis. CONCLUSIONS Taken together, autophagy was activated in the ovarian cryopreservation by vitrification and plays a role in a natural adaptive response to cold stress in ovarian cryopreservation by vitrification.
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Affiliation(s)
- Y Xian
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China
| | - B Li
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China
| | - P Pan
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China
| | - Y Wang
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China
| | - X Pei
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China.
| | - Y Yang
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Department of Biochemistry, Ningxia Medical University, Yinchuan, Ningxia, China.
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Wen FY, Xiao L, Xian Y, Wen XH, Guan XM, Liao ML, Yu J. [Prognosis of the central nervous system involvement in patients with hemophagocytic lymphohistiocytosis]. Zhonghua Xue Ye Xue Za Zhi 2017; 38:848-852. [PMID: 29166736 PMCID: PMC7364957 DOI: 10.3760/cma.j.issn.0253-2727.2017.10.005] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the characteristics and prognostic factor of central nervous system (CNS) involvement in patients with hemophagocytic lymphohistiocytosis (HLH) . Methods: From January 2006 to October 2015, 152 patients with HLH, 88 patients had CNS involvement, their clinical data were collected, and survival was analyzed using the Kaplan-Meier life table method, univariate and multivariate Cox regression model analyses were applied to identify the risk factors of prognosis. Results: ①57.9% patients complicated with neurological symptoms, cerebrospinal fluid abnormalities were observed in 37.0% patients, 57.5% patients had abnormal neuroradiology. ②36 patients survived well, 3 patients lost to follow-up, 49 dead, 1 survival patient had epilepsy. ③The 3-year overall survival rate of 88 patients was 44%. ④abnormal CSF and unreceived IT bore a significant, independent adverse prognostic value (P<0.05) . Conclusion: CNS involvement in HLH has a high frequency and poor prognosis, few patients remained neurologic sequelae; abnormal CSF related to poor prognosis, positive intrathecal injections could improve the prognosis.
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Affiliation(s)
- F Y Wen
- Department of Hematology and Oncology, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
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Gundlund A, Xian Y, Peterson E, Butt J, Gadsboell K, Olesen J, Koeber L, Torp-Pedersen C, Gislason G, Fosboel E. P4308Pre- and post-stroke antithrombotic therapy in atrial fibrillation patients - a Danish nation-wide registry-based study. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Vinereanu D, Al-Khalidi H, Rao M, Lopes R, Bahit C, Ciobanu A, Pokorney S, Xian Y, Jiang J, Kamath D, Berwanger O, Tajer C, Huo Y, Xavier D, Granger C. P3631Determinants of antithrombotic treatment of patients with AF: baseline characteristics from a clustered randomized trial to IMProve treatment with AntiCoagulanTs in patients with AF (IMPACT-AF). Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
We investigate the properties of magnon edge states in a ferromagnetic honeycomb spin lattice with a Dzialozinskii-Moriya interaction (DMI). We derive analytical expressions for the energy spectra and wavefunctions of the edge states localized on the boundaries. By introducing an external on-site potential at the outermost sites, we show that the bosonic band structure is similar to that of the fermionic graphene. We investigate the region in the momentum space where the bosonic edge states are well defined and we analyze the width of the edge state and their dependence with the DMI strength. Our findings extend the predictions using topological arguments and they allow size-dependent confirmation from possible experiments.
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Affiliation(s)
- Pierre A Pantaleón
- Theoretical Physics Division, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom
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Xiao L, Guan XM, Meng Y, Zhao XD, Xian Y, An YF, Yu J. [X-linked lymphoproliferative syndrome type 1 complicated with secondary hemophagocytic lymphohistiocytosis and ileal perforation: case report and literature review]. Zhonghua Er Ke Za Zhi 2016; 54:290-293. [PMID: 27055430 DOI: 10.3760/cma.j.issn.0578-1310.2016.04.013] [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: 06/05/2023]
Abstract
OBJECTIVE To analyze and summarize the clinical characteristics, laboratory tests and treatment of X-linked lymphoproliferative syndrome type 1 (XLP-1). METHOD A retrospective study was done in 2012 on an XLP-1 patient to collect the data on clinical manifestation, laboratory examination, gene and protein expression, complications and prognosis. Literatures were reviewed in Pubmed with the key word"X-linked lymphoproliferative syndrome". RESULT The patient with persistent high fever, jaundice, abdominal distension, hepatosplenomegaly and lymphadenectasis, rash and suspicious positive family history; the patient eventually died of hemophagocytic lymphohistiocytosis (HLH), with intestinal perforation, intestinal infection and bleeding after being infected with EB virus. This patient with SH2D1A gene exon 1 large fragment of the coding region of the nucleotide deletion and insertion mutations causing missense mutations (p.Leu25Lys) and nonsense mutations (stop codon TAG was inserted after missense mutation so that the protein encoded by the early termination of the 25 amino acids), which led to SAP protein missing. The expression of SAP in his mother was also partly missing. Retrieval of reports on XLP-1 was conducted through literature search (included totally 157 cases) at home and abroad, positive family history accounted for 60.6%(40/66); lymphoma incidence accounted for 49.7%(72/145); low gamma globulin occurred in 24.8%(39/157) of cases; secondary HLH ratio accounted for 43.3%(68/157); XLP-1 in patients with hemorrhagic enteritis and gastritis was low, accounted for only 2.6%(3/116). CONCLUSION XLP-1 patients occasionally develop necrotic enteritis complicated with ileal perforation.XLP-1 with large fragment deletion of SH2D1A gene might be associated with serious gastrointestinal manifestations.
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Affiliation(s)
- L Xiao
- Department of Hematology and Oncology, Nephropathy, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
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O'Brien EC, Xian Y, Fonarow GC, Olson DM, Schwamm LH, Hernandez AF. Clinical Commentary on "Certain Uncertainty: Life After Stroke From the Patient's Perspective". Circ Cardiovasc Qual Outcomes 2014; 7:970. [DOI: 10.1161/circoutcomes.114.001484] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Lin CB, Peterson ED, Smith EE, Saver JL, Liang L, Xian Y, Olson DM, Shah BR, Hernandez AF, Schwamm LH, Fonarow GC. Patterns, Predictors, Variations, and Temporal Trends in Emergency Medical Service Hospital Prenotification for Acute Ischemic Stroke. J Am Heart Assoc 2012. [DOI: 10.1161/jaha.112.002345x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Merdan M, Xian Y. Coupled-cluster calculations for the ground and excited states of the spin-half XXZ model. J Phys Condens Matter 2011; 23:406001. [PMID: 21937779 DOI: 10.1088/0953-8984/23/40/406001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The coupled-cluster method is applied to the spin-1/2 antiferromagnetic XXZ model on a square lattice by employing an approximation which contains two-body long-range correlations and high-order four-body local correlations. Improvement is found for the ground-state energy, the sublattice magnetization and the critical anisotropy when comparing with the approximation including the two-body correlations alone. We also obtain the full excitation spectrum which is in good agreement with the quantum Monte Carlo results and the high-order spin-wave theory.
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Affiliation(s)
- Mohammad Merdan
- School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK
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17
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Abstract
By extending our recently proposed magnon-density waves to low dimensions, we investigate, using a microscopic many-body approach, the longitudinal excitations of the quasi-one-dimensional (quasi-1d) and quasi-2d Heisenberg antiferromagnetic systems on a bipartite lattice with a general spin quantum number. We obtain the full energy spectrum of the longitudinal mode as a function of the coupling constants in the original lattice Hamiltonian and find that it always has a nonzero energy gap if the ground state has a long-range order and becomes gapless for the pure isotropic 1d model. The numerical value of the minimum gap in our approximation agrees with that of a longitudinal mode observed in the quasi-1d antiferromagnetic compound KCuF3 at low temperature. It will be interesting to compare values of the energy spectrum at other momenta if their experimental results are available.
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Affiliation(s)
- Y Xian
- School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK
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18
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Mohile S, Xian Y, Fan L. P104 The impact of a new cancer diagnosis on vulnerability in older Medicare beneficiaries. Crit Rev Oncol Hematol 2009. [DOI: 10.1016/s1040-8428(09)70142-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Zhou H, Xu J, Rodriguez M, van den Haak F, Zhu X, Xian Y, Nelson G, Jogani R, Keall P, Graves E. TH-C-BRC-10: Evaluation of a Micro-CT Based 3D Conformal Animal Radiotherapy System. Med Phys 2009. [DOI: 10.1118/1.3182624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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20
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Mohile SG, Xian Y, Lazurenko I, Morrow GR, Fisher SG, Hall W. The impact of cancer on vulnerability in older Medicare beneficiaries. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.9578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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21
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Xian Y, Liu M, Cai Q, Li H, Lu J, Jin L. Preparation of microporous aluminium anodic oxide film modified Pt nano array electrode and application in direct measurement of nitric oxide release from myocardial cells. Analyst 2001; 126:871-6. [PMID: 11445954 DOI: 10.1039/b010181h] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel method for fabricating a nano array electrode (NAE) by using micropores of aluminium anodic film as templates was investigated. To evaluate the NAE, cyclic scanning of NAE in Fe(CN)6(3-) solution was performed and a sigmoidal shaped voltammogram was obtained. The NAE was designed to measure nitric oxide (NO) in vitro and in vivo. Studies showed that it was a sensitive and selective NO electrochemical sensor. NO release from myocardial cells was directly measured with this NAE and the results were satisfactory.
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Affiliation(s)
- Y Xian
- Department of Chemistry, East China Normal University, Shanghai 200062, China
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22
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Li H, Tu H, Cai Q, Xian Y, Jin L. Determination of sulfur dioxide in vitriol plant wastewater by using a polyNiMe4TAA electrochemically modified Pt microelectrode. Analyst 2001; 126:669-72. [PMID: 11394311 DOI: 10.1039/b009164m] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Pt microelectrode modified with nickel(II) polytetramethyldibenzo[b,i]tetraaza[14]annulene was prepared by electropolymerization of nickel(II) tetramethyldibenzo[b,i]tetraaza[14]annulene monomers and applied to determine sulfur dioxide in vitriol plant wastewater. For determination of SO2 with this electrochemically modified Pt microelectrode, the linear range was from 9.6 x 10(-6) to 2.4 x 10(-4) mol L-1, the sensitivity was 1.8 x 10(-4) A L mol-1, the detection limit was calculated to be 4.8 x 10(-6) mol L-1 (S/N = 3), the response time was less than 20 s and the relative standard deviation was found to be 2.1% on analyzing 4.8 x 10(-5) mol L-1 SO2 solution repeatedly (n = 7). These results demonstrated good accuracy compared with those obtained by the conventional iodimetric method.
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Affiliation(s)
- H Li
- Department of Chemistry, East China Normal University, Shanghai, 200062, China
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23
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Xue J, Ying X, Chen J, Xian Y, Jin L. Amperometric ultramicrosensors for peroxynitrite detection and its application toward single myocardial cells. Anal Chem 2000; 72:5313-21. [PMID: 11080882 DOI: 10.1021/ac000701e] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The research studied the concentration variation of peroxynitrite anion (O=N-O-O-) released from cultured neonatal myocardial cells induced by ischemia/reperfusion and studied the protective effect of melatonin on the injury. For this purpose, amperometry peroxynitrite ultramicrosensors (UMS) were fabricated and constructed by electropolymerizing inorganic macromolecular film of tetraaminophthalocyanine manganese(II) and coating chemically with poly(4-vinylpyridine). Under optimum conditions, the UMS showed high selectivity and sensitivity to peroxynitrite determination with a calculated detection limit of 1.8 x 10(-8) mol/L (S/N of 3). The detection of peroxynitrite was based on electrocatalytic reduction of peroxynitrite. The mechanism of catalysis was also discussed. The UMS should be promising for in vivo measurement of peroxynitrite without interference or fouling. Peroxynitrite released from myocardial cells both in the ischemic period and in the reperfusion period was measured directly. This approach may lead to important information for myocardial cells on the mechanism of injury and prospective treatments of medicine such as melatonin.
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Affiliation(s)
- J Xue
- Department of Chemistry, School of Chemistry & Life Science, East China Normal University, Shanghai, PR. of China.
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24
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Abstract
Nitric oxide (NO) plays an important role in various physiological processes, acting either as an intra- and intercellular messenger or as a toxic agent. The detection and quantification of NO have been accomplished by a variety of methodologies. In the present study, real-time production of NO in the rat heart was continuously measured by using a novel copper-platinum microparticle-modified NO electrochemical microsensor. The linearity range of the microsensor is between 8.0 x 10(-8) and 4.8 x 10(-6) mol L-1 and the detection limit is 3.0 x 10(-8) mol L-1. NO release from the rat heart stimulated by the agonists L-arginine and acetylcholine was observed, and the responses were decreased by the NO synthase inhibitor L-N omega-nitroarginine. In addition, the effect of sodium nitroprusside (SNP), a NO donor, was also studied. SNP increases the concentration of NO in the rat heart. The experiments showed that electrochemical detection is suitable for detecting and quantifying NO in biological systems.
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Affiliation(s)
- Y Xian
- Department of Chemistry, East China Normal University, Shanghai, China
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25
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Xu R, Xian Y. [Theoretical analysis of Cu-O bond stretching vibration out of CuO2 plane of bi-system high temperature]. Guang Pu Xue Yu Guang Pu Fen Xi 2000; 20:295-297. [PMID: 12958936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this article, according to the molecule vibration theory and on the base of simple model, the stretching vibration modes of Cu-O bond out of CuO2 plane were analysed and stretching vibration frequencies were calculated. The calculating result approximately coincided with the result of experimental analysis.
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Affiliation(s)
- R Xu
- Deparment of Physics, Liaoning University, 110036 Shenyang
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26
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Xu R, Tang H, Li C, Xian Y. [Analysis of Cu-O bond stretching vibration in CuO2 plane of Bi-system high temperature superconductor]. Guang Pu Xue Yu Guang Pu Fen Xi 1999; 19:44-46. [PMID: 15818913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Infrared absorption spectra of Bi-system high zero resistance temperature (Tc) superconductors were measured. The relation between Cu-O bond stretching vibration in CuO2 plane and superconducting properties of Bi-system high Tc superconductors were analysed and discussed. The result of analysis indicated that the change of absorption peak strength of Cu-O bond stretching vibration was similar to the change of Tc. The reason was related to the coupling between the phonon and free carrier. And according to the theory of molecule vibration, the frequencies of Cu-O bond stretching vibration in CuO2 plane were calculated on the base of simplified model.
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Affiliation(s)
- R Xu
- Department of Physics, Liaoning University, 110036 Shenyang
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27
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Xian Y, Li D, Li H, Sun S. [Synthesis of new pyrazoline fluorescent compounds and their IR spectra and fluorescence property]. Guang Pu Xue Yu Guang Pu Fen Xi 1998; 18:543-546. [PMID: 15825363] [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: 05/24/2023]
Abstract
The Fluorescent compounds of pyrazoline have been used in many field. According to Schellhammer theory, we designed and synthesized five new benzothiazoyl pyrazoline compounds. Their infrared spectra and fluorescent spectra of five compounds were detected. The results showed that five compounds have fluorescence, fluorescence emission wavelength is about 450nm. Effect of different substituents on the fluorescent intensity was investigated.
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Affiliation(s)
- Y Xian
- Department of Light Industry and Textile Engineering, Jilin Institute of Technology, 130012 Changchun
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28
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Xian Y, Lan T, Wang Y. [Effects of flunarizine and vitamin C on hemodynamics in rat heart subjected to ischemia-reperfusion]. Hua Xi Yi Ke Da Xue Xue Bao 1998; 29:285-8. [PMID: 10684094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Langendorff perfusion isolated rat heart was subjected to total global ischemia (coronary flow rate is equal to zero) for 10 minutes and reperfusion for 15 minutes. The heart rate (HR), left ventricular developed pressure (LVDP), coronary flow rate (CFR), electrocardiogram (ECG) and the effects of calcium antagonist-flunarizine (FNZ) and/or oxygen free radical scavenger--vitamine C on the above parameters were observed. The results showed that FNZ dilated coronary vessel (P < 0.01) and had a slight negative chronotropic effect, but it had no effect on LVP. Vitamine C did not affect HR, LVP and CFR. The recovery of the product of HR and LVDP-Rate Pressure Product (RPP) in the FNZ + Vit. C group, Vit. C group and FNZ group was significantly higher than that in the control group (P < 0.05) at ten minutes reperfusion. All the results suggest that FNZ and Vit. C may improve the recovery of heart function after reperfusion.
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Affiliation(s)
- Y Xian
- Department of Physiology, School of Basic Medical Sciences, Chengdu
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29
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Xian Y, Lan T, Wang Y. [Protective effects of flunarizine and vitamin C on isolated rat heart subjected to ischemia-reperfusion injury]. Hua Xi Yi Ke Da Xue Xue Bao 1998; 29:155-9. [PMID: 10684005] [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: 04/14/2023]
Abstract
Isolated rat heart was subjected to Langendorff perfusion for 10 minutes of total global ischemia, and reperfusion for 15 minutes. The content of myocardial intracellular calcium, content of oxygen free radical induced lipid peroxide mitabolite-malondialdehyde (MDA), content of Lactic dehydrogenase (LDH) in coronary effluent, and the change of myocardial morphology were studied. The effects of flunarizine(FNZ) and/or vitamin C(Vit C) on the above parameters were observed. The results showed that, at 15 minutes of reperfusion, the contents of myocardial intracellular calcium, of MDA in myocaredium and of LDH in coronary effluent in the FNZ + Vit C group, Vit C group and FNZ group were all lower than those in the control group, and the change of morphology in the three groups was also slighter than that in the control group. When FNZ and Vit C were administered together, the effect was more marked and equivalent to the sum total of the effects of the two drugs. These suggest that both FNZ and Vit C reduce reperfusion injury through suppression of myocardium calcium overload and oxygen free radical damage.
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Affiliation(s)
- Y Xian
- Department of Physiology, School of Basic Medical Sciences, Chengdu
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30
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Abobo CV, Xian Y. Lack of pharmacokinetic interaction between dipyridamole and zalcitabine in rats. Cell Mol Biol (Noisy-le-grand) 1997; 43:1045-50. [PMID: 9449537] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Resistance usually manifests following long-term dideoxynucleoside therapy of HIV-1 infection. This period appears to coincide with reduced dosage regimens. Resistance that is associated with long-term monotherapy may, in part, be due to decreased intracellular drug concentrations. It has been reported that intracellular uptake of the dideoxynucleosides is enhanced by dipyridamole. Hence, dipyridamole may potentially be used to optimize the effects of zalcitabine in HIV-1 antiretroviral "cocktail". The purpose of this study was to characterize the pharmacokinetics of zalcitabine when administered alone and concomitantly with dipyridamole. Also, we determined, indirectly, whether dipyridamole modulated the intracellular uptake of zalcitabine. Rats were intravenously administered either zalcitabine 100 mg/kg alone or with dipyridamole 15 mg/kg. Except renal clearance (CIR), there were no statistically significant differences in the pharmacokinetic parameters including the steady-state volume of distribution and distribution coefficient. Zalcitabine plasma concentrations declined rapidly in a bi-exponential fashion, with a terminal half-life of 1.03 +/- 0.18 hr. alone versus 1.08 +/- 0.22 hr. with dipyridamole. The area under the concentration-time curve was not significantly different with or without dipyridamole. ClR, was 1.42 +/- 0.37 l/hr./kg for zalcitabine alone versus 1.09 +/- 0.28 l/hr./kg with dipyridamole. Our single dose study show that zalcitabine disposition kinetics were not significantly modulated by dipyridamole.
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Affiliation(s)
- C V Abobo
- Department of Pharmacy Practice, College of Pharmacy and Health Sciences, Texas Southern University, Houston 77004, USA
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31
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Abstract
A low-resolution three-dimensional model of membrane-bound H,K-ATPase from pig gastric mucosa has been reconstructed by electron microscopy and image processing of two-dimensional crystals in negative stain. The crystal formation is induced by magnesium and vanadate, which stabilize the E2 conformation of the enzyme. The unit cell, with a size of a = b = 123 A, gamma = 90 degrees, has tetragonal p4 symmetry. There are four separate alpha beta protomers within each unit cell. The high-contrast region is limited to the cytoplasmic part of the protein. The total volume of the observed asymmetric protein domain corresponds to a molecular mass of 80-90 kDa. It consists mainly of a large pear-shaped domain measuring 60 x 45 A2, with a height of 50 A as measured perpendicular to the membrane plane. A small stalk segment, 20 A in length, forms a connection to the transmembrane region.
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Affiliation(s)
- Y Xian
- Department of Biosciences at Novum, Karolinska Institutet, Huddinge, Sweden
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32
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Xian Y. Rigorous results on a first-order phase transition in antiferromagnetic spin-1/2 coupled chains. Phys Rev B Condens Matter 1995; 52:12485-12488. [PMID: 9980394 DOI: 10.1103/physrevb.52.12485] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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33
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Bishop RF, Hale RG, Xian Y. Systematic inclusion of high-order multispin correlations for the spin-1/2 XXZ models. Phys Rev Lett 1994; 73:3157-3160. [PMID: 10057302 DOI: 10.1103/physrevlett.73.3157] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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34
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Bishop RF, Kendall AS, Wong LY, Xian Y. Correlations in Abelian lattice gauge field models: A microscopic coupled-cluster treatment. Phys Rev D Part Fields 1993; 48:887-901. [PMID: 10016319 DOI: 10.1103/physrevd.48.887] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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35
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Bishop RF, Parkinson JB, Xian Y. Coupled-cluster calculations of quantum XXZ models with a general spin. Phys Rev B Condens Matter 1992; 46:880-888. [PMID: 10003273 DOI: 10.1103/physrevb.46.880] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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36
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Abstract
Two-dimensional crystallization of membrane-bound H,K-ATPase (EC 3.6.1.36) in vesicle preparations from parietal cells of hog gastric mucosa was induced by an imidazole buffer containing Mg2+ and VO3- ions. A continuous reorganization of the protein molecules started within a few hours by the formation of linear arrays. At later stages confluent two-dimensional crystals were formed. Electron microscopy and image processing showed that these were of a single tetragonal type. The asymmetric unit consisted of one pear-shaped protein domain corresponding to a H,K-ATPase protomer. Through stain-deficient contact regions four adjacent protein units were connected forming a tetrameric structure.
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Affiliation(s)
- H Hebert
- Center for Structural Biochemistry, Karolinska Institute, Novum, Huddinge, Sweden
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37
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Bishop RF, Parkinson JB, Xian Y. Many-body correlations in quantum antiferromagnets: A microscopic coupled-cluster approach. Phys Rev B Condens Matter 1991; 43:13782-13785. [PMID: 9997247 DOI: 10.1103/physrevb.43.13782] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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