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Jin P, Zhang Y, Du Y, Chen X, Kindong R, Xue H, Chai F, Yu W. Eddy impacts on abundance and habitat distribution of a large predatory squid off Peru. Mar Environ Res 2024; 195:106368. [PMID: 38286075 DOI: 10.1016/j.marenvres.2024.106368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 01/14/2024] [Accepted: 01/15/2024] [Indexed: 01/31/2024]
Abstract
The pelagic cephalopod species jumbo flying squid Dosidicus gigas is ecologically and economically important in the Humboldt ecosystem off Peru. This squid species is sensitive to oceanic environmental changes, and regional oceanographical variability is one of the important factors driving its redistribution. Off Peruvian waters, mesoscale eddies are ubiquitous and dominate the biogeochemical processes in this region. This study first explored the role of mesoscale eddies in regulating the environments and their effects on the abundance and habitat distribution of D. gigas off Peru by analyzing squid distribution in eddy-centric coordinates and building a habitat suitability index (HSI) model. Results indicated that the abundance and habitat distribution of D. gigas in mesoscale eddies varied across months, with significant differences observed between anticyclonic eddies (AE) and cyclonic eddies (CE). In AE, a higher abundance and proportion of suitable habitat occurred. While in CE, the abundance was relatively low and the suitable habitat was relatively less, concentrating at the periphery of CE. Based on the HSI model results, sea surface temperature (SST) and 50 m water temperature (T50m) in AE were more favorable for D. gigas, which was 0.3-0.5 °C lower than that in CE, yielding high-quality habitats and higher abundance of D. gigas. Our findings emphasized that mesoscale eddies have a significant impact on water temperature conditions and nutrient concentrations off Peruvian waters.
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Affiliation(s)
- Pengchao Jin
- College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
| | - Yang Zhang
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, Zhejiang, China
| | - Yanlin Du
- College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
| | - Xinjun Chen
- College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China; National Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China
| | - Richard Kindong
- College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China; National Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China
| | - Huijie Xue
- State Key Laboratory of Marine Environmental Sciences, Xiamen University, Xiamen, China
| | - Fei Chai
- State Key Laboratory of Marine Environmental Sciences, Xiamen University, Xiamen, China
| | - Wei Yu
- College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China; National Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China.
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2
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Zhang T, Liu J, Xiang Y, Liu X, Zhang J, Zhang L, Ying Q, Wang Y, Wang Y, Chen S, Chai F, Zheng M. Quantifying anthropogenic emission of iron in marine aerosol in the Northwest Pacific with shipborne online measurements. Sci Total Environ 2024; 912:169158. [PMID: 38092217 DOI: 10.1016/j.scitotenv.2023.169158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/18/2023] [Accepted: 12/05/2023] [Indexed: 01/01/2024]
Abstract
Anthropogenic emissions are recognized as significant contributors to atmospheric soluble iron (Fe) in recent years, which may affect marine primary productivity, especially in Fe-limited areas. However, the contribution of different emission sources to Fe in marine aerosol has been primarily estimated by modeling approaches. Quantifying anthropogenic Fe based on field measurements remains a great challenge. In this study, online multi-element measurements and Positive Matrix Factorization (PMF) were combined for the first time to quantify sources of atmospheric Fe and soluble Fe in the Northwest Pacific during a cruise in spring 2015. Fe concentration in 624 atmospheric PM2.5 samples measured online was 74.58 ± 90.87 ng/m3. The PMF results showed anthropogenic activities, including industrial coal combustion, biomass burning, and maritime transport, were important in this region, contributing 31.4 % of atmospheric Fe on average. In addition, anthropogenic Fe concentration resolved by PMF was comparable to the simulation results of the CMAQ (Community Multiscale Air Quality) and GEOS-Chem (Goddard Earth Observing System-Chemical transport) models, with better correlation to CMAQ (r = 0.76) than GEOS-Chem (r = 0.26). This study developed a new method to estimate atmospheric soluble Fe, which integrates Fe source apportionment results and Fe solubility from different sources. Soluble Fe concentration was estimated as 3.93 ± 5.14 ng/m3, of which 87.0 % was attributed to anthropogenic emissions. Notably, ship emission alone contributed 27.5 % of soluble Fe, though its contribution to total Fe was only 2.2 %. Finally, the total deposition fluxes of atmospheric Fe (37.11 ± 38.43 μg/m2/day) and soluble Fe (1.85 ± 2.13 μg/m2/day) were estimated. This study developed a new methodology for quantifying contribution of anthropogenic emissions to Fe in marine aerosol, which could greatly help the assessment of impacts of human activities on marine environment.
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Affiliation(s)
- Tianle Zhang
- SKL-ESPC and SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, China
| | - Junyi Liu
- SKL-ESPC and SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, China
| | - Yaxin Xiang
- SKL-ESPC and SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, China
| | - Xiaomeng Liu
- SKL-ESPC and SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, China
| | - Jie Zhang
- Zachary Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX 77845, USA
| | - Lin Zhang
- Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, China
| | - Qi Ying
- Zachary Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX 77845, USA
| | - Yuntao Wang
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Yinan Wang
- Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Shuangling Chen
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Fei Chai
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
| | - Mei Zheng
- SKL-ESPC and SEPKL-AERM, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, China.
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3
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Guo M, Xing X, Xiu P, Dall'Olmo G, Chen W, Chai F. Efficient biological carbon export to the mesopelagic ocean induced by submesoscale fronts. Nat Commun 2024; 15:580. [PMID: 38233392 PMCID: PMC10794176 DOI: 10.1038/s41467-024-44846-7] [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: 04/08/2023] [Accepted: 01/08/2024] [Indexed: 01/19/2024] Open
Abstract
Oceanic submesoscale processes are ubiquitous in the North Pacific Subtropical Gyre (NPSG), where the biological carbon pump is generally ineffective. Due to difficulties in collecting continuous observations, however, it remains uncertain whether episodic submesoscale processes can drive significant changes in particulate organic carbon (POC) export into the mesopelagic ocean. Here we present observations from high-frequency Biogeochemical-Argo floats in the NPSG, which captured the enhanced POC export fluxes during the intensifying stages of a submesoscale front and a cyclonic eddy compared to their other life stages. A higher percentage of POC export flux was found to be transferred to the base of mesopelagic layer at the front compared to that at the intensifying eddy and the mean of previous studies (37% vs. ~10%), suggesting that the POC export efficiency was significantly strengthened by submesoscale dynamics. Such findings highlight the importance of submesoscale fronts for carbon export and sequestration in subtropical gyres.
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Affiliation(s)
- Mingxian Guo
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Xiaogang Xing
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
| | - Peng Xiu
- State Key Laboratory of Marine Environmental Science & College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.
| | - Giorgio Dall'Olmo
- Istituto Nazionale di Oceanografia e di Geofisica Sperimentale-OGS, Trieste, Italy
| | - Weifang Chen
- State Key Laboratory of Marine Environmental Science & College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Fei Chai
- State Key Laboratory of Marine Environmental Science & College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
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4
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Jiang HB, Hutchins DA, Ma W, Zhang RF, Wells M, Jiao N, Wang Y, Chai F. Natural ocean iron fertilization and climate variability over geological periods. Glob Chang Biol 2023; 29:6856-6866. [PMID: 37855153 DOI: 10.1111/gcb.16990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 09/20/2023] [Accepted: 09/27/2023] [Indexed: 10/20/2023]
Abstract
Marine primary producers are largely dependent on and shape the Earth's climate, although their relationship with climate varies over space and time. The growth of phytoplankton and associated marine primary productivity in most of the modern global ocean is limited by the supply of nutrients, including the micronutrient iron. The addition of iron via episodic and frequent events drives the biological carbon pump and promotes the sequestration of atmospheric carbon dioxide (CO2 ) into the ocean. However, the dependence between iron and marine primary producers adaptively changes over different geological periods due to the variation in global climate and environment. In this review, we examined the role and importance of iron in modulating marine primary production during some specific geological periods, that is, the Great Oxidation Event (GOE) during the Huronian glaciation, the Snowball Earth Event during the Cryogenian, the glacial-interglacial cycles during the Pleistocene, and the period from the last glacial maximum to the late Holocene. Only the change trend of iron bioavailability and climate in the glacial-interglacial cycles is consistent with the Iron Hypothesis. During the GOE and the Snowball Earth periods, although the bioavailability of iron in the ocean and the climate changed dramatically, the changing trend of many factors contradicted the Iron Hypothesis. By detangling the relationship among marine primary productivity, iron availability and oceanic environments in different geological periods, this review can offer some new insights for evaluating the impact of ocean iron fertilization on removing CO2 from the atmosphere and regulating the climate.
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Affiliation(s)
- Hai-Bo Jiang
- Key Laboratory of Marine Biotechnology of Zhejiang Province, School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, China
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, Zhejiang, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong, China
| | - David A Hutchins
- Department of Biological Sciences, University of Southern California, Los Angeles, California, USA
| | - Wentao Ma
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, Zhejiang, China
| | - Rui-Feng Zhang
- School of Oceanography, Shanghai Jiaotong University, Shanghai, Shanghai, China
| | - Mark Wells
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, Zhejiang, China
- School of Marine Sciences, University of Maine, Orono, Maine, USA
| | - Nianzhi Jiao
- State Key Laboratory of Marine Environmental Sciences, Xiamen University, Xiamen, Fujian, China
| | - Yuntao Wang
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, Zhejiang, China
| | - Fei Chai
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, Zhejiang, China
- State Key Laboratory of Marine Environmental Sciences, Xiamen University, Xiamen, Fujian, China
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Wang R, Fortier TM, Chai F, Miao G, Shen JL, Restrepo LJ, DiGiacomo JJ, Velentzas PD, Baehrecke EH. PINK1, Keap1, and Rtnl1 regulate selective clearance of endoplasmic reticulum during development. Cell 2023; 186:4172-4188.e18. [PMID: 37633267 PMCID: PMC10530463 DOI: 10.1016/j.cell.2023.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 04/27/2023] [Accepted: 08/07/2023] [Indexed: 08/28/2023]
Abstract
Selective clearance of organelles, including endoplasmic reticulum (ER) and mitochondria, by autophagy plays an important role in cell health. Here, we describe a developmentally programmed selective ER clearance by autophagy. We show that Parkinson's disease-associated PINK1, as well as Atl, Rtnl1, and Trp1 receptors, regulate ER clearance by autophagy. The E3 ubiquitin ligase Parkin functions downstream of PINK1 and is required for mitochondrial clearance while having the opposite function in ER clearance. By contrast, Keap1 and the E3 ubiquitin ligase Cullin3 function downstream of PINK1 to regulate ER clearance by influencing Rtnl1 and Atl. PINK1 regulates a change in Keap1 localization and Keap1-dependent ubiquitylation of the ER-phagy receptor Rtnl1 to facilitate ER clearance. Thus, PINK1 regulates the selective clearance of ER and mitochondria by influencing the balance of Keap1- and Parkin-dependent ubiquitylation of substrates that determine which organelle is removed by autophagy.
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Affiliation(s)
- Ruoxi Wang
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Tina M Fortier
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Fei Chai
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Guangyan Miao
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - James L Shen
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Lucas J Restrepo
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Jeromy J DiGiacomo
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Panagiotis D Velentzas
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Eric H Baehrecke
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA.
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6
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Wang WL, Fernández-Méndez M, Elmer F, Gao G, Zhao Y, Han Y, Li J, Chai F, Dai M. Ocean afforestation is a potentially effective way to remove carbon dioxide. Nat Commun 2023; 14:4339. [PMID: 37474510 PMCID: PMC10359291 DOI: 10.1038/s41467-023-39926-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 06/27/2023] [Indexed: 07/22/2023] Open
Affiliation(s)
- Wei-Lei Wang
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China.
| | - Mar Fernández-Méndez
- Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany
| | - Franziska Elmer
- School for Field Studies, Center for Marine Resource Studies, South Caicos, Turks and Caicos Islands
| | - Guang Gao
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Yangyang Zhao
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Yuye Han
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Jiandong Li
- State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
| | - Fei Chai
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Minhan Dai
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
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7
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Su F, Fan R, Yan F, Meadows M, Lyne V, Hu P, Song X, Zhang T, Liu Z, Zhou C, Pei T, Yang X, Du Y, Wei Z, Wang F, Qi Y, Chai F. Widespread global disparities between modelled and observed mid-depth ocean currents. Nat Commun 2023; 14:2089. [PMID: 37045863 PMCID: PMC10097707 DOI: 10.1038/s41467-023-37841-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 03/31/2023] [Indexed: 04/14/2023] Open
Abstract
The mid-depth ocean circulation is critically linked to actual changes in the long-term global climate system. However, in the past few decades, predictions based on ocean circulation models highlight the lack of data, knowledge, and long-term implications in climate change assessment. Here, using 842,421 observations produced by Argo floats from 2001-2020, and Lagrangian simulations, we show that only 3.8% of the mid-depth oceans, including part of the equatorial Pacific Ocean and the Antarctic Circumpolar Current, can be regarded as accurately modelled, while other regions exhibit significant underestimations in mean current velocity. Knowledge of ocean circulation is generally more complete in the low-latitude oceans but is especially poor in high latitude regions. Accordingly, we propose improvements in forecasting, model representation of stochasticity, and enhancement of observations of ocean currents. The study demonstrates that knowledge and model representations of global circulation are substantially compromised by inaccuracies of significant magnitude and direction, with important implications for modelled predictions of currents, temperature, carbon dioxide sequestration, and sea-level rise trends.
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Affiliation(s)
- Fenzhen Su
- State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.
- School of Geography and Ocean Sciences, Nanjing University, Nanjing, 210093, China.
- Collaborative Innovation Center for the South China Sea Studies, Nanjing University, Nanjing, 210023, China.
| | - Rong Fan
- State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fengqin Yan
- State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Michael Meadows
- School of Geography and Ocean Sciences, Nanjing University, Nanjing, 210093, China
- Department of Environmental & Geographical Science, University of Cape Town, Rondebosch, 7701, South Africa
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Vincent Lyne
- IMAS-Hobart, University of Tasmania, Tasmania, 7004, Australia
| | - Po Hu
- Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Xiangzhou Song
- College of Oceanography, Hohai University, Nanjing, 211100, China
| | - Tianyu Zhang
- College of Oceanography and Meteorology, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Zenghong Liu
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China
| | - Chenghu Zhou
- State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Tao Pei
- State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaomei Yang
- State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yunyan Du
- State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zexun Wei
- First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao, 266061, China
| | - Fan Wang
- Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Yiquan Qi
- College of Oceanography, Hohai University, Nanjing, 211100, China
| | - Fei Chai
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
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Xiang H, Zhao F, Wu T, Zhang X, Chai F, Wang Q, Repo E, Min X, Lin Z. Unraveling the steric hindrance roles of the phenolic hydroxyl position on the selective Ge(IV) recovery from zinc residue leachate. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123338] [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: 02/05/2023]
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9
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Liu Z, Xing X, Chen Z, Lu S, Wu X, Li H, Zhang C, Cheng L, Li Z, Sun C, Xu J, Chen D, Chai F. Twenty years of ocean observations with China Argo. Hai Yang Xue Bao 2023; 42:1-16. [PMID: 36941976 PMCID: PMC10018621 DOI: 10.1007/s13131-022-2076-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 06/14/2022] [Indexed: 06/18/2023]
Abstract
The international Argo program, a global observational array of nearly 4 000 autonomous profiling floats initiated in the late 1990s, which measures the water temperature and salinity of the upper 2 000 m of the global ocean, has revolutionized oceanography. It has been recognized one of the most successful ocean observation systems in the world. Today, the proposed decade action "OneArgo" for building an integrated global, full-depth, and multidisciplinary ocean observing array for beyond 2020 has been endorsed. In the past two decades since 2002, with more than 500 Argo deployments and 80 operational floats currently, China has become an important partner of the Argo program. Two DACs have been established to process the data reported from all Chinese floats and deliver these data to the GDACs in real time, adhering to the unified quality control procedures proposed by the Argo Data Management Team. Several Argo products have been developed and released, allowing accurate estimations of global ocean warming, sea level change and the hydrological cycle, at interannual to decadal scales. In addition, Deep and BGC-Argo floats have been deployed, and time series observations from these floats have proven to be extremely useful, particularly in the analysis of synoptic-scale to decadal-scale dynamics. The future aim of China Argo is to build and maintain a regional Argo fleet comprising approximately 400 floats in the northwestern Pacific, South China Sea, and Indian Ocean, accounting for 9% of the global fleet, in addition to maintaining 300 Deep Argo floats in the global ocean (25% of the global Deep Argo fleet). A regional BGC-Argo array in the western Pacific also needs to be established and maintained.
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Affiliation(s)
- Zenghong Liu
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012 China
- Observation and Research Station of Global Ocean Argo System (Hangzhou), Ministry of Natural Resources, Hangzhou, 310012 China
| | - Xiaogang Xing
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012 China
- Observation and Research Station of Global Ocean Argo System (Hangzhou), Ministry of Natural Resources, Hangzhou, 310012 China
| | - Zhaohui Chen
- Frontier Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Physical Oceanography, Ocean University of China, Qingdao, 266100 China
| | - Shaolei Lu
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012 China
- Observation and Research Station of Global Ocean Argo System (Hangzhou), Ministry of Natural Resources, Hangzhou, 310012 China
| | - Xiaofen Wu
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012 China
- Observation and Research Station of Global Ocean Argo System (Hangzhou), Ministry of Natural Resources, Hangzhou, 310012 China
| | - Hong Li
- Department of Atmospheric and Oceanic Sciences/Institute of Atmospheric Sciences, Fudan University, Shanghai, 200438 China
| | - Chunling Zhang
- College of Marine Sciences, Shanghai Ocean University, Shanghai, 201306 China
| | - Lijing Cheng
- International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029 China
| | - Zhaoqin Li
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012 China
- Observation and Research Station of Global Ocean Argo System (Hangzhou), Ministry of Natural Resources, Hangzhou, 310012 China
| | - Chaohui Sun
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012 China
- Observation and Research Station of Global Ocean Argo System (Hangzhou), Ministry of Natural Resources, Hangzhou, 310012 China
| | - Jianping Xu
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012 China
- Observation and Research Station of Global Ocean Argo System (Hangzhou), Ministry of Natural Resources, Hangzhou, 310012 China
| | - Dake Chen
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012 China
| | - Fei Chai
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012 China
- Observation and Research Station of Global Ocean Argo System (Hangzhou), Ministry of Natural Resources, Hangzhou, 310012 China
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10
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Zhang T, Zheng M, Sun X, Chen H, Wang Y, Fan X, Pan Y, Quan J, Liu J, Wang Y, Lyu D, Chen S, Zhu T, Chai F. Environmental impacts of three Asian dust events in the northern China and the northwestern Pacific in spring 2021. Sci Total Environ 2023; 859:160230. [PMID: 36395839 DOI: 10.1016/j.scitotenv.2022.160230] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 10/17/2022] [Accepted: 11/13/2022] [Indexed: 06/16/2023]
Abstract
In March 2021, China experienced three dust events (Dust-1, 2, 3), especially the first of which was reported as the strongest one in recent ten years. Their environmental impacts have received great attention, demanding comprehensive study to assess such impacts quantitatively. Multiple advanced measurement methods, including satellite, ground-based lidar, online aerosol speciation instrument, and biogeochemical Argo float, were applied to examine and compare the transport paths, optical and chemical properties, and impacts of these three dust events on urban air quality and marine ecosystem. The results showed that Dust-1 exhibited the largest impacts on urban area, increasing PM10 concentration in Beijing, Shuozhou, and Shijiazhuang up to 7525, 3819, and 2992 μg m-3, respectively. However, due to fast movement of the Mongolian low-pressure cyclone, the duration of northwest wind over the land was quite short (e.g., only 10 h in Beijing), which prevented the transport of dust plume to the northwestern Pacific, resulting in limited impact on the ocean. Dust-2 and Dust-3, though weaker in intensity, were transported directly to the sea, and led to a substantial increase in chlorophyll-a concentration (up to near 3 times) in the northwestern Pacific, comparing to climatological value. This indicates that the impacts of dust events on ocean was not necessarily and positively correlated to their impacts on land. Based on the analyses of land-ocean-space integrated observational data and synoptic systems, this study examined how marine ecosystem responded to three significant Asian dust events in spring 2021 and quantitatively assessed the overall impacts of mega dust storms both on land and ocean, which could also provide an interdisciplinary research methodology for future research on strong aerosol emission events such as wildfire and volcanic eruption.
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Affiliation(s)
- Tianle Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Mei Zheng
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
| | - Xiaoguang Sun
- Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Huanhuan Chen
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Yuntao Wang
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China.
| | - Xuehua Fan
- Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
| | - Yubing Pan
- Institute of Urban Meteorology, Chinese Meteorological Administration, Beijing 100089, China
| | - Jiannong Quan
- Institute of Urban Meteorology, Chinese Meteorological Administration, Beijing 100089, China
| | - Junyi Liu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Yinan Wang
- Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Daren Lyu
- Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Shuangling Chen
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Tong Zhu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Fei Chai
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
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11
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Chai F, Zhang R, Min X, Yang Z, Chai L, Zhao F. Highly efficient removal of arsenic (III/V) from groundwater using nZVI functionalized cellulose nanocrystals fabricated via a bioinspired strategy. Sci Total Environ 2022; 842:156937. [PMID: 35753491 DOI: 10.1016/j.scitotenv.2022.156937] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 06/08/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
Utilizing nanoscale zero valent iron (nZVI) to purify groundwater contaminated by arsenic species [As(III/V)] is an efficient technology, but the fast and severe aggregation of nZVI limits its practical applications. Herein, nZVI was anchored onto the mussel-inspired polydopamine-coated cellulose nanocrystals (CNCs-PDA-nZVI) as an efficient material for As groundwater remediation. In this set, the introduction of nZVI was expected to significantly enhance the arsenic removal property, while cellulose nanocrystals (CNCs) endowed nZVI with ultrahigh dispersibility. The batch results showed that the maximum As adsorption capacities of CNCs-PDA-nZVI (i.e., 333.3 mg g-1 and 250.0 mg g-1 for As(III) and As(V), respectively) were ten times higher compared with those of pristine CNCs. The kinetics results revealed that chemical adsorption was dominant for As adsorption. The isotherms indicated that a homogeneous adsorption for As(III) and heterogenous adsorption for As(V) on the surface of CNCs-PDA-nZVI. The removal mechanisms for As by CNCs-PDA-nZVI included adsorption-oxidation, coprecipitation and inner-sphere complexation. Overall, the excellent arsenic removal efficiency makes CNCs-PDA-nZVI a promising material for the remediation of As polluted groundwater, and this in-situ anchoring strategy can be extended to overcome the aggregation bottleneck of other nanoparticles for various applications.
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Affiliation(s)
- Fei Chai
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Rui Zhang
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Xiaobo Min
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Zhihui Yang
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Liyuan Chai
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Feiping Zhao
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (CNERC-CTHMP), School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China.
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12
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Chai F, Wang J, Zhou KX, Wang SK, Liu YH, Jin Z, Tang YZ. Design, synthesis and biological evaluation of novel pleuromutilin derivatives possessing 4-aminothiophenol linker as promising antibacterial agents. Bioorg Chem 2022; 126:105859. [PMID: 35605553 DOI: 10.1016/j.bioorg.2022.105859] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 03/22/2022] [Accepted: 05/05/2022] [Indexed: 12/01/2022]
Abstract
A series of novel pleuromutilin derivatives containing 4-aminothiophenol moieties have been designed and synthesized as promising antibacterial agents against Methicillin-resistant Staphylococcus aureus (MRSA). The in vitro antibacterial activity of these semisynthetic derivatives against 4 strains of S. aureus (MRSA ATCC 43300, S. aureus ATCC 29213, S. aureus 144 and S. aureus AD3) was evaluated by the broth dilution method. Most of the synthesized derivatives displayed prominent in vitro activity (MIC ≤ 0.5 µg/mL). 12 Compounds possessed superior antibacterial activity against MRSA compared with valnemulin and retapamulin (MIC = 0.0625 µg/mL). Compounds 12, 16a, 16c and 19 exhibited the most effective antibacterial effect against MRSA (MIC = 0.015 µg/mL). Furthermore, the time-kill curves showed compounds 12 and 19 had a certain inhibitory effect against MRSA in vitro. Compounds 12 and 19 possessed longer PAE time (2.74 h and 3.11 h, respectively) than tiamulin (PAE = 2.04 h) against MRSA after exposure at 4 × MIC concentration for 2 h. Compounds 12 and 19 also displayed superior in vivo antibacterial efficacy (-1.20 log10 CFU/mL and -1.21 log10 CFU/mL, respectively) than tiamulin (-0.75 log10 CFU/mL) in reducing MRSA load in the mice thigh infection model. In addition, compound 19 had barely inhibitory effect on RAW 264.7 and 16HBE cells at 8 µg/mL. In molecular docking study, upon docking into the 50S ribosomal subunit, the binding free energy (ΔGb) of compound 12 and 19 was calculated to be -9.02 kcal/mol and -9.89 kcal/mol, respectively.
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Affiliation(s)
- Fei Chai
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Jun Wang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Ke-Xin Zhou
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Shou-Kai Wang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Ya-Hong Liu
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Zhen Jin
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China.
| | - You-Zhi Tang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China.
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13
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Luo T, Wang R, Chai F, Jiang L, Rao P, Yan L, Hu X, Zhang W, Wei L, Khataee A, Han N. Arsenite (III) removal via manganese-decoration on cellulose nanocrystal -grafted polyethyleneimine nanocomposite. Chemosphere 2022; 303:134925. [PMID: 35561766 DOI: 10.1016/j.chemosphere.2022.134925] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/26/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
The manganese is successfully induced as a "bridge joint" to fabricate a new adsorbent (CNC-Mn-PEI) connecting cellulose nanocrystal (CNC) and polyethyleneimine (PEI) respectively. It was used to remove As (III) from waste water. It has been proved that the incompact CNC and PEI were successfully connected by Mn ions, which induced the formation of O-Mn-O bonds and the removal efficiency is maintained in the broad pH range of 4-8, even with the influence of NO3- and CO32-. The CNC-Mn-PEI was characterized by Brunauer-Emmett-Telley (BET) method and the results showed that the nanoparticle of the specific surface area was 106.5753 m2/g, it has a significant improvement, compared with CNC-Mn-DW (0.1918 m2/g). The isotherm and kinetic parameters of arsenic removal on CNC-Mn-PEI were well-fitted by the Langmuir and pseudo-second-order models. The maximum adsorption capacities toward As (III) was 78.02 mg/g. After seven regeneration cycles, the removal of As (III) by the adsorbent decreased from 80.78% to 68.2%. Additionally, the hypothetical adsorption mechanism of "bridge joint" effect was established by FTIR and XPS, which provided the three activated sites from CNC-Mn-PEI can improve the arsenic removal efficiency, and providing a new stratagem for the arsenic pollution treatment.
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Affiliation(s)
- Tingting Luo
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
| | - Runkai Wang
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China.
| | - Fei Chai
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Lei Jiang
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
| | - Pinhua Rao
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
| | - Lili Yan
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
| | - Xinjian Hu
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
| | - Wei Zhang
- Department of Materials Engineering, KU Leuven, Leuven, 3001, Belgium
| | - Lianghuan Wei
- College of Chemistry and Environmental Science, Kashi University, Kashi, 844000, China
| | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran; Department of Environmental Engineering, Faculty of Engineering, Gebze Technical University, 41400, Gebze, Turkey; Department of Material Science and Physical Chemistry of Materials, South Ural State University, 454080 Chelyabinsk, Russian Federation
| | - Ning Han
- Department of Materials Engineering, KU Leuven, Leuven, 3001, Belgium.
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14
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Liang L, Chai Y, Chai F, Liu H, Ma N, Zhang H, Zhang S, Nong L, Li T, Zhang B. Expression of SASP, DNA Damage Response, and Cell Proliferation Factors in Early Gastric Neoplastic Lesions: Correlations and Clinical Significance. Pathol Oncol Res 2022; 28:1610401. [PMID: 36061145 PMCID: PMC9437220 DOI: 10.3389/pore.2022.1610401] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 07/21/2022] [Indexed: 12/24/2022]
Abstract
The cyclic GMP-AMP synthase (cGAS)-stimulator of interferon genes (STING)-mediated senescence-associated secretory phenotype (SASP) pathway has recently been identified in the suppression and promotion of cancers. However, its practical role in carcinogenesis remains to be comprehensively elucidated. Here, we describe an investigation analysing SASP activity and its correlations with DNA damage response (DDR), genomic mutations, and cell proliferation in gastric carcinogenesis among 30 cases with available endoscopic submucosal dissection (ESD) specimens of early neoplastic lesions (including low-grade dysplasia [LGD], high-grade dysplasia [HGD], and intramucosal carcinoma). The positive cells of senescence-associated β-galactosidase staining and cGAS, STING, interferon-regulatory factor 3 (IRF3), and signal transducer and activator of transcription 6 (STAT6) expression levels using immunostaining were elevated in HGD and in cancers. Similarly, increased expression of the Fanconi anemia group D2 (FANCD2) protein, tumour suppressor p53 binding protein 1 (TP53BP1), and replication protein A (RPA2) (i.e., primary DDR factors) was detected in HGD and in cancers; these increased expression levels were closely correlated with high expression of Ki67 and minichromosome maintenance complex component 7 (MCM7) proteins. Moreover, genomic mutations in TP53 gene were detected in 56.67% of the evaluated cases (17/30) using next-generation sequencing, and positive staining was verified in HGD and in cancers. Statistical analysis revealed that cell proliferation closely correlated with the expression of DDR factors, of which TP53BP1 was positively associated with SASP factors and IRF3 was positively correlated with cell proliferation. In addition, an analysis evaluating clinical features demonstrated that STAT6-positive cases showed a longer progression-free survival time than STAT6-negative cases. Our evaluation, conducted using a limited number of specimens, suggests SASP may be prevalent in early gastric neoplastic lesions and could be activated by accelerated cell proliferation-induced DDR. The clinical significance of SASP still needs to be determined.
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Affiliation(s)
- Li Liang
- Department of Pathology, Peking University First Hospital, Beijing, China
| | - Yijie Chai
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Fei Chai
- Department of Pathology, Fenyang College of Shanxi Medical University, Fenyang, China
| | - Haijing Liu
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Ningning Ma
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Hong Zhang
- Department of Pathology, Peking University First Hospital, Beijing, China
| | - Shuang Zhang
- Department of Pathology, Peking University First Hospital, Beijing, China
| | - Lin Nong
- Department of Pathology, Peking University First Hospital, Beijing, China
| | - Ting Li
- Department of Pathology, Peking University First Hospital, Beijing, China
| | - Bo Zhang
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
- *Correspondence: Bo Zhang,
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15
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Zhu Y, Feng Y, Browning TJ, Wen Z, Hughes DJ, Hao Q, Zhang R, Meng Q, Wells ML, Jiang Z, Dissanayake PAKN, Priyadarshani WNC, Shou L, Zeng J, Chai F. Exploring Variability of Trichodesmium Photophysiology Using Multi-Excitation Wavelength Fast Repetition Rate Fluorometry. Front Microbiol 2022; 13:813573. [PMID: 35464918 PMCID: PMC9026164 DOI: 10.3389/fmicb.2022.813573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 02/11/2022] [Indexed: 11/20/2022] Open
Abstract
Fast repetition rate fluorometry (FRRf) allows for rapid non-destructive assessment of phytoplankton photophysiology in situ yet has rarely been applied to Trichodesmium. This gap reflects long-standing concerns that Trichodesmium (and other cyanobacteria) contain pigments that are less effective at absorbing blue light which is often used as the sole excitation source in FRR fluorometers-potentially leading to underestimation of key fluorescence parameters. In this study, we use a multi-excitation FRR fluorometer (equipped with blue, green, and orange LEDs) to investigate photophysiological variability in Trichodesmium assemblages from two sites. Using a multi-LED measurement protocol (447+519+634 nm combined), we assessed maximum photochemical efficiency (F v /F m ), functional absorption cross section of PSII (σ PSII ), and electron transport rates (ETRs) for Trichodesmium assemblages in both the Northwest Pacific (NWP) and North Indian Ocean in the vicinity of Sri Lanka (NIO-SL). Evaluating fluorometer performance, we showed that use of a multi-LED measuring protocol yields a significant increase of F v /F m for Trichodesmium compared to blue-only excitation. We found distinct photophysiological differences for Trichodesmium at both locations with higher average F v /F m as well as lower σ PSII and non-photochemical quenching (NPQ NSV ) observed in the NWP compared to the NIO-SL (Kruskal-Wallis t-test df = 1, p < 0.05). Fluorescence light response curves (FLCs) further revealed differences in ETR response with a lower initial slope (α ETR ) and higher maximum electron turnover rate ( E T R P S I I m a x ) observed for Trichodesmium in the NWP compared to the NIO-SL, translating to a higher averaged light saturation E K (= E T R P S I I m a x /α ETR ) for cells at this location. Spatial variations in physiological parameters were both observed between and within regions, likely linked to nutrient supply and physiological stress. Finally, we applied an algorithm to estimate primary productivity of Trichodesmium using FRRf-derived fluorescence parameters, yielding an estimated carbon-fixation rate ranging from 7.8 to 21.1 mgC mg Chl-a-1 h-1 across this dataset. Overall, our findings demonstrate that capacity of multi-excitation FRRf to advance the application of Chl-a fluorescence techniques in phytoplankton assemblages dominated by cyanobacteria and reveals novel insight into environmental regulation of photoacclimation in natural Trichodesmium populations.
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Affiliation(s)
- Yuanli Zhu
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
- Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
| | - Yuanyuan Feng
- School of Oceanography, Shanghai Jiao Tong University, Shanghai, China
| | - Thomas J. Browning
- Marine Biogeochemistry Division, GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany
| | - Zuozhu Wen
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - David J. Hughes
- Climate Change Cluster, Faculty of Science, University of Technology Sydney, Ultimo, NSW, Australia
| | - Qiang Hao
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
- Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
| | - Ruifeng Zhang
- School of Oceanography, Shanghai Jiao Tong University, Shanghai, China
| | - Qicheng Meng
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
| | - Mark L. Wells
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
- Darling Marine Center, University of Maine, Walpole, ME, United States
| | - Zhibing Jiang
- Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
| | - P. A. K. N. Dissanayake
- Department of Oceanography and Marine Geology, Faculty of Fisheries and Marine Sciences and Technology, University of Ruhuna, Matara, Sri Lanka
| | - W. N. C. Priyadarshani
- National Institute of Oceanography and Marine Sciences, National Aquatic Resources Research and Development Agency, Colombo, Sri Lanka
| | - Lu Shou
- Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
| | - Jiangning Zeng
- Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
| | - Fei Chai
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
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16
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Wang Y, Chen HH, Tang R, He D, Lee Z, Xue H, Wells M, Boss E, Chai F. Australian fire nourishes ocean phytoplankton bloom. Sci Total Environ 2022; 807:150775. [PMID: 34619187 DOI: 10.1016/j.scitotenv.2021.150775] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 09/17/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
An unprecedented devastating forest fire occurred in Australia from September 2019 to March 2020. Satellite observations revealed that this rare fire event in Australia destroyed a record amount of more than 202,387 km2 of forest, including 56,471 km2 in eastern Australia, which is mostly composed of evergreen forest. The released aerosols contained essential nutrients for the growth of marine phytoplankton and were transported by westerly winds over the Southern Ocean, with rainfall-induced deposition to the ocean beneath. Here, we show that a prominent oceanic bloom, indicated by the rapid growth of phytoplankton, took place in the Southern Ocean along the trajectory of fire-born aerosols in response to atmospheric deposition. Calculations of carbon released during the fire versus carbon absorbed by the oceanic phytoplankton bloom suggest that they were nearly equal. This finding illustrates the critical role of the oceans in mitigating natural and anthropogenic carbon dioxide releases to the atmosphere, which are a primary driver of climate change.
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Affiliation(s)
- Yuntao Wang
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Huan-Huan Chen
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China; Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Rui Tang
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Ding He
- Department of Ocean Science and Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), The Hong Kong University of Science and Technology, Hong Kong, China; Organic Geochemistry Unit, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
| | - Zhongping Lee
- School for the Environment, University of Massachusetts Boston, Boston 02125, USA
| | - Huijie Xue
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Mark Wells
- School of Marine Sciences, University of Maine, Orono 04469, USA; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Emmanuel Boss
- School of Marine Sciences, University of Maine, Orono 04469, USA
| | - Fei Chai
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China; Ocean College, Zhejiang University, Zhoushan 316021, China.
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17
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Liu J, Zhang GY, Zhang Z, Li B, Chai F, Wang Q, Zhou ZD, Xu LL, Wang SK, Jin Z, Tang YZ. Design, synthesis, in vitro and in vivo evaluation against MRSA and molecular docking studies of novel pleuromutilin derivatives bearing 1, 3, 4-oxadiazole linker. Bioorg Chem 2021; 112:104956. [PMID: 33991838 DOI: 10.1016/j.bioorg.2021.104956] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 04/22/2021] [Accepted: 04/27/2021] [Indexed: 11/30/2022]
Abstract
A class of pleuromutilin derivatives containing 1, 3, 4-oxadiazole were designed and synthesized as potential antibacterial agents against Methicillin-resistant staphylococcus aureus (MRSA). The ultrasound-assisted reaction was proposed as a green chemistry method to synthesize 1, 3, 4-oxadiazole derivatives (intermediates 85-110). Among these pleuromutilin derivatives, compound 133 was found to be the strongest antibacterial derivative against MRSA (MIC = 0.125 μg/mL). Furthermore, the result of the time-kill curves displayed that compound 133 could inhibit the growth of MRSA in vitro quickly (- 4.36 log10 CFU/mL reduction). Then, compound 133 (- 1.82 log10 CFU/mL) displayed superior in vivo antibacterial efficacy than tiamulin (- 0.82 log10 CFU/mL) in reducing MRSA load in mice thigh model. Besides, compound 133 exhibited low cytotoxicity to RAW 264.7 cells. Molecular docking studies revealed that compound 133 was successfully localized in the binding pocket of 50S ribosomal subunit (ΔGb = -10.50 kcal/mol). The results indicated that these pleuromutilin derivatives containing 1, 3, 4-oxadiazole might be further developed into novel antibiotics against MRSA.
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Affiliation(s)
- Jie Liu
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Guang-Yu Zhang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Zhe Zhang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Bo Li
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Fei Chai
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Qi Wang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Zi-Dan Zhou
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Ling-Ling Xu
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Shou-Kai Wang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Zhen Jin
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China.
| | - You-Zhi Tang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China.
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Chai F, Wang R, Yan L, Li G, Cai Y, Xi C. Facile fabrication of pH-sensitive nanoparticles based on nanocellulose for fast and efficient As(V) removal. Carbohydr Polym 2020; 245:116511. [PMID: 32718622 DOI: 10.1016/j.carbpol.2020.116511] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 04/29/2020] [Accepted: 05/23/2020] [Indexed: 11/19/2022]
Abstract
This study reported a facile method to synthesize novel pH-sensitive nanoparticle based on nanocellulose, involving cross-linking polyethyleneimine and glutaraldehyde. The adsorbent was characterized and found to be sensitive to the solution pH, especially at pH 3. Additionally, the biosorbent exhibited rapid adsorption during the initial 10 min and the As(V) adsorption capacity of the nanoparticles reached approximately 255.19 mg g-1 at pH 3, which was five times greater than that achieved with the As(V) solution at its initial pH (44.33 mg g-1). To reflect its performance in actual acidic wastewater, the effects of coexisting anions were also investigated, showing that these anions had little influence on As(V) adsorption. Meanwhile, the adsorbent displayed excellent performance even after eight regeneration cycles. This novel material demonstrates enormous potential for the removal of arsenic contaminants and for the development of pH-sensitive materials.
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Affiliation(s)
- Fei Chai
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China.
| | - Runkai Wang
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China; Anji Goachieve Environmental Technology Co., Ltd., Huzhou, 313300, China.
| | - Lili Yan
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China.
| | - Guanghui Li
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China; Anji Goachieve Environmental Technology Co., Ltd., Huzhou, 313300, China.
| | - Yiyun Cai
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China.
| | - Chunyan Xi
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China.
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Gauzit Amiel A, Palomino-Durand C, Maton M, Lopez M, Cazaux F, Chai F, Neut C, Foligné B, Martel B, Blanchemain N. Designed sponges based on chitosan and cyclodextrin polymer for a local release of ciprofloxacin in diabetic foot infections. Int J Pharm 2020; 587:119677. [PMID: 32717280 DOI: 10.1016/j.ijpharm.2020.119677] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/17/2020] [Accepted: 07/18/2020] [Indexed: 12/21/2022]
Abstract
Diabetic foot infections are the most common complications requiring hospitalisation of patients with diabetes. They often result in amputation to extremities and are associated with high morbi-mortality rates, especially when bone is infected. Treatment of these complications is based on surgical procedures, nursing care and systemic antibiotic therapy for several weeks, with a significant risk of relapse. Due to low blood flow and damage caused by diabetic foot infection, blood supply is decreased, causing low antibiotic diffusion in the infected site and an increase of possible bacterial resistance, making this type of infection particularly difficult to treat. In this context, the aim of this work was to develop a medical device for local antibiotic release. The device is a lyophilized physical hydrogel, i.e a sponge based on two oppositely charged polyelectrolytes (chitosan and poly(cyclodextrin citrate)). Cyclodextrins, via inclusion complexes, increase drug bioavailability and allow an extended release. Using local release administration increases concentrations in the wound without risk of toxicity to the body and prevents the emergence of resistant bacteria. The hydrogel was characterised by rheology. After freeze-drying, a curing process was implemented. The swelling rate and cell viability were evaluated, and finally, the sponge was impregnated with a ciprofloxacin solution to evaluate its drug release profile and its antibacterial activity.
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Affiliation(s)
- A Gauzit Amiel
- Univ. Lille, INSERM, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - C Palomino-Durand
- Univ. Lille, INSERM, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - M Maton
- Univ. Lille, INSERM, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - M Lopez
- Univ. Lille, INSERM, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - F Cazaux
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, F-59000 Lille, France
| | - F Chai
- Univ. Lille, INSERM, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - C Neut
- Univ. Lille, INSERM, CHU Lille, U1286 - INFINITE - Institute for Translational Research in Inflammation, F-59000 Lille, France
| | - B Foligné
- Univ. Lille, INSERM, CHU Lille, U1286 - INFINITE - Institute for Translational Research in Inflammation, F-59000 Lille, France
| | - B Martel
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, F-59000 Lille, France
| | - N Blanchemain
- Univ. Lille, INSERM, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France.
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Xi C, Wang R, Rao P, Zhang W, Yan L, Li G, Chai F, Cai Y, Luo T, Zhou X. The fabrication and arsenic removal performance of cellulose nanocrystal-containing absorbents based on the “bridge joint” effect of iron ions. Carbohydr Polym 2020; 237:116129. [DOI: 10.1016/j.carbpol.2020.116129] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 02/09/2020] [Accepted: 03/05/2020] [Indexed: 12/12/2022]
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Chai F, Zhao HL, Han XD. [The analysis of mutations in non-syndromic deafness gene SLC26A4 by next generation sequencing technology]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:357-361. [PMID: 30970410 DOI: 10.13201/j.issn.1001-1781.2019.04.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Indexed: 06/09/2023]
Abstract
Objective:To analogize the distribution of nonsyndromic deafness gene SLC26A4 mutation and to characterize clinical profiles in patients with SLC26A4 mutation in order to understand their hereditary etiologies and provide evidence for deafness screening and accurate genetic counseling. Method: SLC26A4 gene was first analized by MALDI-TOF-MS technology to detect the hot mutation c.919-2A>G in 57 cases. There were 3 cases with homozygous mutation and 7cases with heterozygous mutation. Then 54 cases except for 3 cases with homozygous mutation were analyzed by targeted genomic capturing and next generation sequencing technologies(targeted DNA-Hiseq), 81 non-syndromic deafness genes and the chondiogene was designed to all their exons and their flanking intron(±10 bp) sequences. Sanger sequencing was used to confirm the variant by analyzing the DNAs sequences. Result: The carrying rates of SLC26A4 gene in the deafness were 26.32%, but SLC26A4 homozygous genes and compound heterozygous genes were 19.30%. They included 3 cases with c.919-2A>G and 1 case with c.754T>C pathogenic homozygous mutations. While in 7 cases with compound heterozygous there were 6 cases with two pathogenic mutation, there was 1 case with c.2168A>G pathogenic mutation the other likely pathogenic mutation c.1545-1546insC. The 11 cases all were diagnosed large vestibular aqueduct syndrome(LVAS). There were 4 cases with heterozygous that were not found large vestibular aqueduct. Conclusion: Pathogenic mutation of SLC26A4 is closely related to clinical phenotype of LVAS. The hot pathogenic mutation was c.919-2A>G of SLC26A4 gene. The next generation sequencing technology is available for the diagnosis of inherited hearing loss especially for LVAS.
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Ren AS, Chai F, Xue H, Anderson DM, Chavez FP. A Sixteen-year Decline in Dissolved Oxygen in the Central California Current. Sci Rep 2018; 8:7290. [PMID: 29740053 PMCID: PMC5940839 DOI: 10.1038/s41598-018-25341-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 04/11/2018] [Indexed: 11/13/2022] Open
Abstract
A potential consequence of climate change is global decrease in dissolved oxygen at depth in the oceans due to changes in the balance of ventilation, mixing, respiration, and photosynthesis. We present hydrographic cruise observations of declining dissolved oxygen collected along CalCOFI Line 66.7 (Line 67) off of Monterey Bay, in the Central California Current region, and investigate likely mechanisms. Between 1998 and 2013, dissolved oxygen decreased at the mean rate of 1.92 µmol kg−1 year−1 on σθ 26.6–26.8 kg m−3 isopycnals (250–400 m), translating to a 40% decline from initial concentrations. Two cores of elevated dissolved oxygen decline at 130 and 240 km from shore, which we suggest are a California Undercurrent and a California Current signal respectively, occurred on σθ ranges of 26.0–26.8 kg m−3 (100–400 m). A box model suggests that small annual changes in dissolved oxygen in source regions are sufficient to be the primary driver of the mid-depth declines. Variation in dissolved oxygen at the bottom of the surface mixed layer suggests that there is also a signal of increased local remineralization.
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Affiliation(s)
- Alice S Ren
- School of Marine Sciences, University of Maine, Orono, Maine, USA. .,Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, USA.
| | - Fei Chai
- School of Marine Sciences, University of Maine, Orono, Maine, USA
| | - Huijie Xue
- School of Marine Sciences, University of Maine, Orono, Maine, USA
| | - David M Anderson
- Monterey Bay Aquarium Research Institute, Moss Landing, California, USA
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Robberecht L, Chai F, Dehurtevent M, Marchandise P, Bécavin T, Hornez JC, Deveaux E. A novel anatomical ceramic root canal simulator for endodontic training. Eur J Dent Educ 2017; 21:e1-e6. [PMID: 27146633 DOI: 10.1111/eje.12207] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/30/2016] [Indexed: 05/24/2023]
Abstract
INTRODUCTION Endodontic therapy is often complicated and technically demanding. The aim of this study was to develop a reproducible biomimetic root canal model for pre-clinical and postgraduate endodontic training. MATERIAL AND METHODS A specific ceramic shaping technique (3D printing and slip casting of a root canal mould) was developed to reproduce canal systems with the desired shape and complexity using a microporous hydroxyapatite (HAp)-based matrix. The microstructural morphology, pore size and porosity, as well as the Vickers microhardness of the ceramic simulators (CS) were assessed and were compared with natural dentin and commercial resin blocks. The reproducibility of the root canal shapes was assessed using the Dice-Sørensen similarity index. Endodontic treatments, from refitting the access cavity to obturation, were performed on the CS. Each step was controlled by radiography. RESULTS Many properties of the CS were similar to those of natural dental roots, including the mineral component (HAp), porosity (20%, porous CS), pore size (3.4 ± 2.6 μm) and hardness (120.3 ± 18.4 HV). DISCUSSION We showed that it is possible to reproduce the radio-opacity of a tooth and variations in root canal morphology. The endodontic treatments confirmed that the CS provided good tactile sensation during instrumentation and displayed suitable radiological behaviour. CONCLUSIONS This novel anatomic root canal simulator is well suited for training undergraduate and postgraduate students in endodontic procedures.
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Affiliation(s)
- L Robberecht
- Department of Restorative Dentistry and Endodontics, Faculty of Odontology, Université de Lille, Lille, France
- Faculty of Medicine, INSERM U1008, Université de Lille, Lille, France
- LMCPA, Université de Valenciennes, Valenciennes, France
| | - F Chai
- Faculty of Medicine, INSERM U1008, Université de Lille, Lille, France
| | - M Dehurtevent
- Department of Prosthodontics, Faculty of Dentistry, Université de Lille, Lille, France
| | | | - T Bécavin
- Department of Restorative Dentistry and Endodontics, Faculty of Odontology, Université de Lille, Lille, France
| | - J-C Hornez
- LMCPA, Université de Valenciennes, Valenciennes, France
| | - E Deveaux
- Department of Restorative Dentistry and Endodontics, Faculty of Odontology, Université de Lille, Lille, France
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Pan G, Chai F, Tang D, Wang D. Marine phytoplankton biomass responses to typhoon events in the South China Sea based on physical-biogeochemical model. Ecol Modell 2017. [DOI: 10.1016/j.ecolmodel.2017.04.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Chai F, Zhao HL, Qiu SQ. [An analysis of the mutation in GJB2,GJB3,SLC26A4 and mtDNA12SrRNA in new born]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:664-666. [PMID: 29871341 DOI: 10.13201/j.issn.1001-1781.2017.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Indexed: 11/12/2022]
Abstract
Objective:To analyze deafness gene mutation in GJB2,GJB3,SLC26A4 and mtDNA12SrRNA in newborn and to explore the significance of genetic test and potential correlations between the genotype and clinical phenotype.Method:Blood samples were collected with a standard protocol and DNA templates are extracted from 501 newborn in Longgang of Shenzhen.MALDI-TOF-MS Technology was used to detect the coding region twenty mutations sites of GJB2,GJB3,SLC26A4 AND mtDNA12SrRNA,includingSLC26A4(1226G>A,1229C>T,281C>T,589G>A,IVS7-2A>T,1174A>T,IVS15+5G>A,1975G>C,2027T>A,2162C>T,2168A>G),GJB2(176-191del16,35delG,167delT,235 delC,299-300 delAT),GJB3(547G>A,538C>T),mtDNA12SrRNA(1555A>G,1494C>T).While two-step hearing screening was carried by using AABR(automatedauditory brainstem response)and DPOAE. Result:In the 501 newborns,26 cases were found have one or two allele mutations of deafness-susceptibility genes.GJB2 gene mutation(n=9,1.796%) all were 235 delC single heterozygosity mutation.GJB3 gene mutation(n=3,0.599%). SLC26A4 gene mutation(n=12,2.395%) included IVS7-2A>G heterozygosity mutation(n=5). MtDNA 12Rrna gene mutation was found in 3 child(n=3,0.599%). Finally one of 26 infants was diagnosed enlarged vestibular aqueduct syndrome. The infant was detected 2168A>G heterozygosity mutation. Conclusion:235delC is the main mutation form of GJB2 gene,while it is the hottest mutation in People. But SLC26A4 gene mutations are the main type in newborn. MtDNA 12Rrna gene mutation was found in 3 child.This genetic epidemiological study demonstrated that genetic screening is helpful for determining high risk individuals and early discovering possible late-onset hearing loss. Moreover pationts and family member can acquire more effective genetic counseling.
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Affiliation(s)
- F Chai
- Longgang ENT Hospital,Institute of ENT and Shenzhen Key Laboratory of ENT,Shenzhen,518172,China
| | - H L Zhao
- Longgang ENT Hospital,Institute of ENT and Shenzhen Key Laboratory of ENT,Shenzhen,518172,China
| | - S Q Qiu
- Longgang ENT Hospital,Institute of ENT and Shenzhen Key Laboratory of ENT,Shenzhen,518172,China
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Vermet G, Degoutin S, Chai F, Maton M, Flores C, Neut C, Danjou PE, Martel B, Blanchemain N. Cyclodextrin modified PLLA parietal reinforcement implant with prolonged antibacterial activity. Acta Biomater 2017; 53:222-232. [PMID: 28216296 DOI: 10.1016/j.actbio.2017.02.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 01/21/2017] [Accepted: 02/10/2017] [Indexed: 11/28/2022]
Abstract
The use of textile meshes in hernia repair is widespread in visceral surgery. Though, mesh infection is a complication that may prolong the patient recovery period and consequently presents an impact on public health economy. Such concern can be avoided thanks to a local and extended antibiotic release on the operative site. In recent developments, poly-l-lactic acid (PLLA) has been used in complement of polyethyleneterephthalate (Dacron®) (PET) or polypropylene (PP) yarns in the manufacture of semi-resorbable parietal implants. The goal of the present study consisted in assigning drug reservoir properties and prolonged antibacterial effect to a 100% PLLA knit through its functionalization with a cyclodextrin polymer (polyCD) and activation with ciprofloxacin. The study focused i) on the control of degree of polyCD functionalization of the PLLA support and on its physical and biological characterization by Scanning Electron Microscopy (SEM), Differential Scanning Calorimetry (DSC) and cell viability, ii) on the understanding of drug/meshes interaction using mathematic model and iii) on the correlation between drug release studies in phosphate buffer saline (PBS) and microbiological evaluation of meshes and release medium against E. coli and S. aureus. All above mentioned tests highlighted the contribution of polyCD on the improved performances of the resulting antibacterial implantable material. STATEMENT OF SIGNIFICANCE 1. We managed for the first time, with well-defined parameters in terms of temperature and time of treatment, to functionalize a bio-absorbable synthetic material to improve drug sorption and drug release properties without affecting its mechanical properties. 2. We analyzed for the first time the degradation of our coating products by mass spectroscopy to show that only citrate and cyclodextrin residues (and glucose units) without any cytotoxicity are formed. 3. We managed to improve the mechanical properties of the PLA with the cyclodextrin polymer to form a composite. The assembly (cyclodextrin polymer and PLLA) remains biodegradable.
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Affiliation(s)
- G Vermet
- Univ. Lille, CNRS, INRA, ENSCL UMR8207, UMET - Unité Matériaux et Transformations, F-59000 Lille, France; Cousin Biotech, 59117 Wervicq-Sud, France
| | - S Degoutin
- Univ. Lille, CNRS, INRA, ENSCL UMR8207, UMET - Unité Matériaux et Transformations, F-59000 Lille, France
| | - F Chai
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - M Maton
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - C Flores
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - C Neut
- Univ. Lille, Inserm, CHU Lille, U995-LIRIC - Lille Inflammation Research International Center, F-59000 Lille, France
| | - P E Danjou
- Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV) - EA 4492, Université du Littoral Côte d'Opale, 145 Avenue Maurice Schumann, MREI 1, 59140 Dunkerque, France
| | - B Martel
- Univ. Lille, CNRS, INRA, ENSCL UMR8207, UMET - Unité Matériaux et Transformations, F-59000 Lille, France
| | - N Blanchemain
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France.
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Shu Y, Xue H, Wang D, Chai F, Xie Q, Cai S, Chen R, Chen J, Li J, He Y. Persistent and energetic bottom-trapped topographic Rossby waves observed in the southern South China Sea. Sci Rep 2016; 6:24338. [PMID: 27075644 PMCID: PMC4830981 DOI: 10.1038/srep24338] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [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: 09/10/2015] [Accepted: 03/15/2016] [Indexed: 11/09/2022] Open
Abstract
Energetic fluctuations with periods of 9-14 days below a depth of 1400 m were observed in the southern South China Sea (SCS) from 5 years of direct measurements. We interpreted such fluctuations as topographic Rossby waves (TRWs) because they obey the dispersion relation. The TRWs persisted from May 24, 2009 to August 23, 2013, and their bottom current speed with a maximum of ~10 cm/s was one order of magnitude greater than the mean current and comparable to the tidal currents near the bottom. The bottom-trapped TRWs had an approximate trapping depth of 325 m and reference wavelength of ~82 km, which were likely excited by eddies above. Upper layer current speed that peaked approximately every 2 months could offer the energy sources for the persistent TRWs in the southern SCS. Energetic bottom-trapped TRWs may have a comparable role in deep circulation to tides in areas with complex topography.
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Affiliation(s)
- Yeqiang Shu
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, People's Republic of China.,School of Marine Sciences, University of Maine, Orono, Maine, USA
| | - Huijie Xue
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, People's Republic of China.,School of Marine Sciences, University of Maine, Orono, Maine, USA
| | - Dongxiao Wang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, People's Republic of China
| | - Fei Chai
- School of Marine Sciences, University of Maine, Orono, Maine, USA
| | - Qiang Xie
- Sanya Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, People's Republic of China
| | - Shuqun Cai
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, People's Republic of China
| | - Rongyu Chen
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, People's Republic of China
| | - Ju Chen
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, People's Republic of China
| | - Jian Li
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, People's Republic of China
| | - Yunkai He
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, People's Republic of China
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Abstract
How animals navigate the constantly moving and visually uniform pelagic realm, often along straight paths between distant sites, is an enduring mystery. The mechanisms enabling pelagic navigation in cartilaginous fishes are particularly understudied. We used shoreward navigation by leopard sharks (Triakis semifasciata) as a model system to test whether olfaction contributes to pelagic navigation. Leopard sharks were captured alongshore, transported 9 km offshore, released, and acoustically tracked for approximately 4 h each until the transmitter released. Eleven sharks were rendered anosmic (nares occluded with cotton wool soaked in petroleum jelly); fifteen were sham controls. Mean swimming depth was 28.7 m. On average, tracks of control sharks ended 62.6% closer to shore, following relatively straight paths that were significantly directed over spatial scales exceeding 1600 m. In contrast, tracks of anosmic sharks ended 37.2% closer to shore, following significantly more tortuous paths that approximated correlated random walks. These results held after swimming paths were adjusted for current drift. This is the first study to demonstrate experimentally that olfaction contributes to pelagic navigation in sharks, likely mediated by chemical gradients as has been hypothesized for birds. Given the similarities between the fluid three-dimensional chemical atmosphere and ocean, further research comparing swimming and flying animals may lead to a unifying paradigm explaining their extraordinary navigational abilities.
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Affiliation(s)
- Andrew P. Nosal
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, 92037, United States of America
| | - Yi Chao
- Department of Atmospheric and Oceanic Sciences and Joint Institute for Regional Earth System Science and Engineering, University of California Los Angeles, Los Angeles, California, 90095, United States of America
| | - John D. Farrara
- Department of Atmospheric and Oceanic Sciences and Joint Institute for Regional Earth System Science and Engineering, University of California Los Angeles, Los Angeles, California, 90095, United States of America
| | - Fei Chai
- School of Marine Sciences, University of Maine, Orono, Maine, 04469, United States of America
| | - Philip A. Hastings
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, 92037, United States of America
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Tolcher A, Harb W, Sachdev J, Papadopoulos K, Bordoni R, Chai F, Larmar M, Savage R, Abbadessa G, Saleh M. 338 Results from a phase 1 study of ARQ 092, a novel pan AKT-inhibitor, in subjects with advanced solid tumors or recurrent malignant lymphoma. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30201-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Vermet G, Degoutin S, Chai F, Maton M, Bria M, Danel C, Hildebrand HF, Blanchemain N, Martel B. Visceral mesh modified with cyclodextrin for the local sustained delivery of ropivacaine. Int J Pharm 2014; 476:149-59. [PMID: 25275939 DOI: 10.1016/j.ijpharm.2014.09.042] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 09/23/2014] [Accepted: 09/26/2014] [Indexed: 11/26/2022]
Abstract
The aim of the study was to develop a polyester visceral implant modified with a cyclodextrin polymer for the local and prolonged delivery of ropivacaine to reduce post operatory pain. Therefore, we applied a coating of an inguinal mesh with a crosslinked polymer of hydroxypropyl-β-cyclodextrin (HPβCD) whose specific host-guest complex forming properties were expected to improve the adsorption capacity of the implant toward anesthetic, and then to release it within a sustained period. The modification reaction of the textile with cyclodextrin was explored through the study of the influence of the pad/dry/cure process parameters and the resulting implant (PET-CD) was characterized by solid state NMR and SEM. Besides, the inclusion complex between ropivacaine and CD was studied by NMR and capillary electrophoresis in PBS medium. Finally, ropivacaine sorption test showed that a maximum of 30 mg/g of ropivacaine could be adsorbed on the functionalized samples. In dynamic batch tests in PBS at pH 7.4, the release could be observed up to 6h. The cytocompatibility of the PET-CD loaded with ropivacaine was also studied and reached 65% cell vitality after 6 days.
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Affiliation(s)
- G Vermet
- Unité Matériaux Et Transformations (UMET), Université Lille 1, 59655 Villeneuve d'Ascq, France; Cousin Biotech, 59117 Wervicq-Sud, France
| | - S Degoutin
- Unité Matériaux Et Transformations (UMET), Université Lille 1, 59655 Villeneuve d'Ascq, France.
| | - F Chai
- INSERM U 1008, Controlled Drug Delivery Systems and Biomaterials, Université Lille 2, 59006 Lille, France
| | - M Maton
- INSERM U 1008, Controlled Drug Delivery Systems and Biomaterials, Université Lille 2, 59006 Lille, France
| | - M Bria
- Centre Commun de Mesures RMN, Université Lille 1, 59655 Villeneuve d'Ascq, France
| | - C Danel
- UDSL, Laboratoire de Chimie Analytique EA 4481, Université Lille 2, 59000 Lille, France
| | - H F Hildebrand
- INSERM U 1008, Controlled Drug Delivery Systems and Biomaterials, Université Lille 2, 59006 Lille, France
| | - N Blanchemain
- INSERM U 1008, Controlled Drug Delivery Systems and Biomaterials, Université Lille 2, 59006 Lille, France
| | - B Martel
- Unité Matériaux Et Transformations (UMET), Université Lille 1, 59655 Villeneuve d'Ascq, France
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Hernandez-Montelongo J, Naveas N, Degoutin S, Tabary N, Chai F, Spampinato V, Ceccone G, Rossi F, Torres-Costa V, Manso-Silvan M, Martel B. Porous silicon-cyclodextrin based polymer composites for drug delivery applications. Carbohydr Polym 2014; 110:238-52. [DOI: 10.1016/j.carbpol.2014.04.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 03/19/2014] [Accepted: 04/02/2014] [Indexed: 10/25/2022]
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Kacem I, Laurent T, Blanchemain N, Neut C, Chai F, Haulon S, Hildebrand HF, Martel B. Dyeing and antibacterial activation with methylene blue of a cyclodextrin modified polyester vascular graft. J Biomed Mater Res A 2013; 102:2942-51. [DOI: 10.1002/jbm.a.34965] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 09/05/2013] [Indexed: 12/28/2022]
Affiliation(s)
- I. Kacem
- University of Lille Nord de France; 59000 Lille France
- Unité Matériaux Et Transformation (UMET); Ingénierie des Systèmes Polymères; Université Lille 1 59655 Villeneuve D'Ascq France
| | - T. Laurent
- University of Lille Nord de France; 59000 Lille France
- Unité Matériaux Et Transformation (UMET); Ingénierie des Systèmes Polymères; Université Lille 1 59655 Villeneuve D'Ascq France
| | - N. Blanchemain
- University of Lille Nord de France; 59000 Lille France
- INSERM U1008, Groupe Recherche Biomatériaux; College of Pharmacy and Medicine University Lille 2; 59045 Lille France
| | - C. Neut
- University of Lille Nord de France; 59000 Lille France
- INSERM U995, Laboratoire de Bactériologie; University Lille 2; 59006 Lille France
| | - F. Chai
- University of Lille Nord de France; 59000 Lille France
- INSERM U1008, Groupe Recherche Biomatériaux; College of Pharmacy and Medicine University Lille 2; 59045 Lille France
| | - S. Haulon
- University of Lille Nord de France; 59000 Lille France
- INSERM U1008, Groupe Recherche Biomatériaux; College of Pharmacy and Medicine University Lille 2; 59045 Lille France
| | - H. F. Hildebrand
- University of Lille Nord de France; 59000 Lille France
- INSERM U1008, Groupe Recherche Biomatériaux; College of Pharmacy and Medicine University Lille 2; 59045 Lille France
| | - B. Martel
- University of Lille Nord de France; 59000 Lille France
- Unité Matériaux Et Transformation (UMET); Ingénierie des Systèmes Polymères; Université Lille 1 59655 Villeneuve D'Ascq France
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Xu Y, Chai F, Rose KA, Ñiquen C. M, Chavez FP. Environmental influences on the interannual variation and spatial distribution of Peruvian anchovy (Engraulis ringens) population dynamics from 1991 to 2007: A three-dimensional modeling study. Ecol Modell 2013. [DOI: 10.1016/j.ecolmodel.2013.01.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Taha M, Chai F, Blanchemain N, Goube M, Martel B, Hildebrand H. Validating the poly-cyclodextrins based local drug delivery system on plasma-sprayed hydroxyapatite coated orthopedic implant with toluidine blue O. Materials Science and Engineering: C 2013; 33:2639-47. [DOI: 10.1016/j.msec.2013.02.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 01/28/2013] [Accepted: 02/15/2013] [Indexed: 11/28/2022]
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Xiu P, Chai F. Spatial and temporal variability in phytoplankton carbon, chlorophyll, and nitrogen in the North Pacific. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2012jc008067] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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Huff DD, Lindley ST, Wells BK, Chai F. Green sturgeon distribution in the Pacific Ocean estimated from modeled oceanographic features and migration behavior. PLoS One 2012; 7:e45852. [PMID: 23029274 PMCID: PMC3448713 DOI: 10.1371/journal.pone.0045852] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 08/23/2012] [Indexed: 11/18/2022] Open
Abstract
The green sturgeon (Acipenser medirostris), which is found in the eastern Pacific Ocean from Baja California to the Bering Sea, tends to be highly migratory, moving long distances among estuaries, spawning rivers, and distant coastal regions. Factors that determine the oceanic distribution of green sturgeon are unclear, but broad-scale physical conditions interacting with migration behavior may play an important role. We estimated the distribution of green sturgeon by modeling species-environment relationships using oceanographic and migration behavior covariates with maximum entropy modeling (MaxEnt) of species geographic distributions. The primary concentration of green sturgeon was estimated from approximately 41-51.5° N latitude in the coastal waters of Washington, Oregon, and Vancouver Island and in the vicinity of San Francisco and Monterey Bays from 36-37° N latitude. Unsuitably cold water temperatures in the far north and energetic efficiencies associated with prevailing water currents may provide the best explanation for the range-wide marine distribution of green sturgeon. Independent trawl records, fisheries observer records, and tagging studies corroborated our findings. However, our model also delineated patchily distributed habitat south of Monterey Bay, though there are few records of green sturgeon from this region. Green sturgeon are likely influenced by countervailing pressures governing their dispersal. They are behaviorally directed to revisit natal freshwater spawning rivers and persistent overwintering grounds in coastal marine habitats, yet they are likely physiologically bounded by abiotic and biotic environmental features. Impacts of human activities on green sturgeon or their habitat in coastal waters, such as bottom-disturbing trawl fisheries, may be minimized through marine spatial planning that makes use of high-quality species distribution information.
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Affiliation(s)
- David D Huff
- Fisheries Ecology Division, Southwest Fisheries Science Center, National Oceanic and Atmospheric Administration, Santa Cruz, CA, USA.
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Garelnabi M, Lor K, Jin J, Chai F, Santanam N. The paradox of ApoA5 modulation of triglycerides: evidence from clinical and basic research. Clin Biochem 2012; 46:12-9. [PMID: 23000317 DOI: 10.1016/j.clinbiochem.2012.09.007] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 08/13/2012] [Accepted: 09/10/2012] [Indexed: 01/02/2023]
Abstract
UNLABELLED Apolipoprotein A5 (ApoA5) is a key regulator of plasma triglycerides (TG), even though its plasma concentration is very low compared to other known apoproteins. Over the years, researchers have attempted to elucidate the molecular mechanisms by which ApoA5 regulates plasma TG in vivo. Though still under debate, two theories broadly describe how ApoA5 modulates TG levels: (i) ApoA5 enhances the catabolism of TG-rich lipoproteins and (ii) it inhibits the rate of production of very low-density lipoprotein (VLDL), the major carrier of TGs. This review will summarize the basic and clinical studies that describe the importance of ApoA5 in TG metabolism. Population studies conducted in various countries have demonstrated an association between single nucleotide polymorphisms (SNPs) in ApoA5 and the increased risk to cardiovascular disease and metabolic syndrome (including diabetes and obesity). ApoA5 is also highly expressed during liver regeneration and is an acute phase protein associated with HDL, which is independent of its effects on TG metabolism. CONCLUSION Despite considerable evidences available from clinical and basic research studies on the role of ApoA5 in TG metabolism and its indirect link to metabolic diseases, additional investigations are needed to understand the paradoxical role of this important apoprotein is modulated by both diet and its polymorphism variants.
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Affiliation(s)
- Mahdi Garelnabi
- Department of Clinical Laboratory and Nutritional Sciences, University of Massachusetts Lowell, MA 01854, USA.
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Zahir H, Kastrissios H, Carothers T, Jansen M, Savage R, Abbadessa G, Chai F, Schwartz B, Miller R, Tokui T. Exposure-Response Relationship to Assess the Risk of Neutropenia in Patients with Hepatocellular Carcinoma (HCC) Treated with Tivantinib. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33319-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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39
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Mahini H, Chai F, Jin J, Wilson T, Garelnabi M. Abstract 308: Quercetin Intake During Exercise Reduces MCP1, Body Weight and Atherosclerotic Plaque in Mice. Arterioscler Thromb Vasc Biol 2012. [DOI: 10.1161/atvb.32.suppl_1.a308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Introduction:
Atherosclerosis is the major causes of cardiovascular diseases (CVD) and a chronic disease of the large arteries; the disease is mostly attributed to inflammation and oxidative stress. Chemokines are involved in the pathogenesis of atherosclerosis by promoting directed migration of inflammatory cells. Monocyte chemoattractant protein-1(MCP1) has been detected in atherosclerotic lesions by anti-MCP-1 antibody detection. MCP-1 is critical for the initiation and development of atherosclerotic lesions. Animal studies using a variety of antioxidants suggest that antioxidants may protect against CVD. Paradoxically, exercise which induces a severe oxidative stress resulting in the depletion of plasma and tissue antioxidants is an important deterrent of CVD.
Aims and Objectives:
In the current study we proposed that quercetin a flavonoid will have profound effects on the pathophysiology of atherosclerosis if combined with exercise, we hypothesized its action to be attributed to the inhibition of lipids oxidation, promoting clearance and improving the acute exercise induced oxidative stress resulting in lowering cholesterol, artery lipids deposition and decreasing the development of the plaque.
Study Design:
This study tested the possible beneficial effects of the combined exercise and quercetin on modulators of oxidation and inflammation in C57BL6 LDL
-/-
mice fed atherogenic diet. 40 mice were divided into four groups (10 each). These groups are as follows: Control mice, left untreated; control quercetin group, orally supplied with 100 μg/day of quercetin without exercising; exercise group without quercetin, and exercise group with quercetin supplements. The exercise groups were run on a treadmill for 30 minutes, 15m/m/ 5 days/week for 30 days. All animals were on atherogenic diet containing 1.5% cholesterol with total 42% Fat Kcal Diet. At the end of the month of treatment, mice were sacrificed, and atherosclerotic lesions in aorta were quantified. Liver, aorta and adipose tissue gene expressions for genes associated with oxidative stress, inflammation and lipoproteins were analyzed.
Results and Conclusion:
Mice on quercetin and exercise have significant (P<0.001) drop in body weigh compared to control, these have been accompanied with a 78% drop in the atherosclerotic plaque development in exercising group compared to non-exercising mice without quercetin and 40% drop in atherosclerotic plaque size in exercising mice supplemented with quercetin compared to control group on quercetin. The changes were also accompanied with changes in plasma lipids and inflammatory markers. Although there is no significant differences in the HDL levels between exercising and non-exercising quercetin taking mice, HDL increased significantly (P<0.001) in control on quercetin compared to controls off the treatment. Animals on quercetin and exercise regimen have significantly (P<0.05) reduced plasma MCP-1 compared to controls on quercetin, interestingly sedentary mice on quercetin has 21% reduction in MCP-1 levels compared to the group without the treatment indicating that intake of quercetin may be responsible for the reduction in MCP-1 levels, body weight and atherosclerotic plaque size. However changes in plasmaTNF alpha levels between the groups with or without the treatments were not significant.
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Affiliation(s)
- Halleh Mahini
- Clinical Labrotaory and Nutritional Sciences, Univ of Massachusetts Lowell, Lowell, MA
| | - Fei Chai
- Clinical Labrotaory and Nutritional Sciences, Univ of Massachusetts Lowell, Lowell, MA
| | - Jun Jin
- Clinical Labrotaory and Nutritional Sciences, Univ of Massachusetts Lowell, Lowell, MA
| | - Thomas Wilson
- Clinical Labrotaory and Nutritional Sciences, Univ of Massachusetts Lowell, Lowell, MA
| | - Mahdi Garelnabi
- Clinical Labrotaory and Nutritional Sciences, Univ of Massachusetts Lowell, Lowell, MA
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Degoutin S, Jimenez M, Casetta M, Bellayer S, Chai F, Blanchemain N, Neut C, Kacem I, Traisnel M, Martel B. Anticoagulant and antimicrobial finishing of non-woven polypropylene textiles. Biomed Mater 2012; 7:035001. [DOI: 10.1088/1748-6041/7/3/035001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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41
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Blanchemain N, Aguilar MR, Chai F, Jimenez M, Jean-Baptiste E, El-Achari A, Martel B, Hildebrand HF, Roman JS. Selective biological response of human pulmonary microvascular endothelial cells and human pulmonary artery smooth muscle cells on cold-plasma-modified polyester vascular prostheses. Biomed Mater 2011; 6:065003. [DOI: 10.1088/1748-6041/6/6/065003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Palacz AP, Xue H, Armbrecht C, Zhang C, Chai F. Seasonal and inter-annual changes in the surface chlorophyll of the South China Sea. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2011jc007064] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Raoul G, Myon L, Chai F, Blanchemain N, Ferri J. [Engineering a bone free flap for maxillofacial reconstruction: technical restrictions]. ACTA ACUST UNITED AC 2011; 112:249-61. [PMID: 21820689 DOI: 10.1016/j.stomax.2011.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Vascularisation is a key for success in bone tissue engineering. Creating a functional vascular network is an important concern so as to ensure vitality in regenerated tissues. Many strategies were developed to achieve this goal. One of these is cellular growth technique by perfusion bioreactor chamber. These new technical requirements came along with improved media and chamber receptacles: bioreactors (chapter 2). Some bone tissue engineering processes already have clinical applications but for volumes limited by the lack of vascularisation. Resorbable or non-resorbable membranes are an example. They are used separately or in association with bone grafts and they protect the graft during the revascularization process. Potentiated osseous regeneration uses molecular or cellular adjuvants (BMPs and autologous stem cells) to improve osseous healing. Significant improvements were made: integration of specific sequences, which may guide and enhance cells differentiation in scaffold; nano- or micro-patterned cell containing scaffolds. Finally, some authors consider the patient body as an ideal bioreactor to induce vascularisation in large volumes of grafted tissues. "Endocultivation", i.e., cellular culture inside the human body was proven to be feasible and safe. The properties of regenerated bone in the long run remain to be assessed. The objective to reach remains the engineering of an "in vitro" osseous free flap without morbidity.
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Affiliation(s)
- G Raoul
- Université Lille Nord-de-France, UDSL, 59000 Lille, France.
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Myon L, Ferri J, Chai F, Blanchemain N, Raoul G. [Oro-maxillofacial bone tissue engineering combining biomaterials, stem cells, and gene therapy]. ACTA ACUST UNITED AC 2011; 112:201-11. [PMID: 21798570 DOI: 10.1016/j.stomax.2011.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Improvements have been made in regenerative medicine, due to the development of tissue engineering and cellular therapy. Bone regeneration is an ambitious project, leading to many applications involving skull, maxillofacial, and orthopaedic surgery. Scaffolds, stem cells, and signals support bone tissue engineering. The scaffold physical and chemical properties promote cell invasion, guide their differentiation, and enable signal transmission. Scaffold may be inorganic or organic. Their conception was improved by the use of new techniques: self-assembled nanofibres, electrospinning, solution-phase separation, micropatterned hydrogels, bioprinting, and rapid prototyping. Cellular biology processes allow us to choose between embryonic stem cells or adult stem cells for regenerative medicine. Finally, communication between cells and their environment is essential; they use various signals to do so. The study of signals and their transmission led to the discovery and the use of Bone Morphogenetic Protein (BMP). The development of cellular therapy led to the emergence of a specific field: gene therapy. It relies on viral vectors, which include: retroviruses, adenoviruses and adeno-associated vectors (AAV). Non-viral vectors include plasmids and lipoplex. Some BMP genes have successfully been transfected. The ability to control transfected cells and the capacity to combine and transfect many genes involved in osseous healing will improve gene therapy.
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Affiliation(s)
- L Myon
- Université Lille Nord de France, UDSL, 59000 Lille, France
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Abstract
Autograft is considered as the "gold standard" for bone reconstruction. It provides osteoinductive factors, osteogenic cells, and appropriate osteoconductive scaffold. Donor site morbidity is the main limitation of autograft. Donor disease transmission limits the use of allograft. Synthetic bone substitutes still lack osteoinductive or osteogenic properties. Composite bone substitutes combining synthetic scaffold and biochemical substances initiating proliferation and cell differentiation, and possibly osteogenesis. Bone substitutes and grafts intended for clinical use are listed.
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Affiliation(s)
- F Chai
- Université Lille Nord de France, UDSL, 59000 Lille, France
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48
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Adjei AA, Sosman JA, Martell RE, Dy GK, Goff LW, Ma WW, Horn L, Fetterly GJ, Michael SA, Means JA, Chai F, Lamar M, Strauss GM, Chiang W, Jarboe J, Schwartz BE, Puzanov I. Efficacy in selected tumor types in a phase I study of the c-MET inhibitor ARQ 197 in combination with sorafenib. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.3034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [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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Galindo HM, Pfeiffer-Herbert AS, McManus MA, Chao Y, Chai F, Palumbi SR. Seascape genetics along a steep cline: using genetic patterns to test predictions of marine larval dispersal. Mol Ecol 2010; 19:3692-707. [PMID: 20723046 DOI: 10.1111/j.1365-294x.2010.04694.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Coupled biological and physical oceanographic models are powerful tools for studying connectivity among marine populations because they simulate the movement of larvae based on ocean currents and larval characteristics. However, while the models themselves have been parameterized and verified with physical empirical data, the simulated patterns of connectivity have rarely been compared to field observations. We demonstrate a framework for testing biological-physical oceanographic models by using them to generate simulated spatial genetic patterns through a simple population genetic model, and then testing these predictions with empirical genetic data. Both agreement and mismatches between predicted and observed genetic patterns can provide insights into mechanisms influencing larval connectivity in the coastal ocean. We use a high-resolution ROMS-CoSINE biological-physical model for Monterey Bay, California specifically modified to simulate dispersal of the acorn barnacle, Balanus glandula. Predicted spatial genetic patterns generated from both seasonal and annual connectivity matrices did not match an observed genetic cline in this species at either a mitochondrial or nuclear gene. However, information from this mismatch generated hypotheses testable with our modelling framework that including natural selection, larval input from a southern direction and/or increased nearshore larval retention might provide a better fit between predicted and observed patterns. Indeed, moderate selection and a range of combined larval retention and southern input values dramatically improve the fit between simulated and observed spatial genetic patterns. Our results suggest that integrating population genetic models with coupled biological-physical oceanographic models can provide new insights and a new means of verifying model predictions.
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Affiliation(s)
- Heather M Galindo
- Department of Biology, Stanford University, Hopkins Marine Station, Pacific Grove, CA 93950, USA
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50
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Adjei AA, Sosman JA, Dy GK, Ma W, Fetterly GJ, Skupien D, Means JA, Savage R, Chai F, Puzanov I. A phase I dose-escalation trial evaluating ARQ 197 administered in combination with sorafenib in adult patients (pts) with advanced solid tumors. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.3024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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