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Sources and environmental fate of pyrogenic polycyclic aromatic hydrocarbons(PAHs)in the Arctic

emerging Contaminants 2019年第1期5卷 128-142页

作者： jennifer e.balmer Hayley Hung Yong Yu Robert J.Letcher Derek C.G.Muir Arctic Monitoring and Assessment Programme Fram CentrePO Box 6606 Langnes9296TromsøNorway Department of Biology The Citadel171 Moultrie StreetCharlestonSC29409USA Air Quality Processes Research Section Environment and Climate Change Canada4905 Dufferin StreetTorontoOntarioM3H 5T4Canada Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun130102China ecotoxicology and Wildlife Health Division Environment and Climate Change CanadaNational Wildlife Research CentreCarleton UniversityRaven RoadOttawaOntarioK1A 0H3Canada environment and Climate Change Canada Canada Centre for Inland Waters867 Lakeshore RoadBurlingtonONL7S 1A1Canada

Polycyclic aromatic hydrocarbons(PAHs)are large class of hydrophobic,semi-volatile organic contaminants that may enter the environment from both natural sources and anthropogenic *** PAHs arise from the incomplete combustion of fossil fuels and organic matter and following dispersal via long-range transport and may subsequently deposit in surface waters,soils and sediments of remote regions,including the *** current review summarizes and discusses Arctic data that is available for combustion-derived PAHs between 2004 and early 2018,focusing largely on data collected from remote,unexploited Arctic regions and from studies that provide some evidence of a pyrogenic *** increasing use of attribution ratios,which aid in discriminating PAHs from petrogenic or pyrogenic sources,suggest PAHs found in Arctic marine waters and sediment predominantly originate from natural underwater seeps,while those measured in air,freshwater,and terrestrial environments are likely to have originated from atmospheric and combustion-derived *** efforts indicate that atmospheric PAHs in the Canadian and Norwegian Arctic are likely to have originated in the northern hemisphere e predominantly from Western Russia,northern europe,and North *** Asia appears to be a minor source of PAHs to the Arctic,despite contributing more than 50%of global PAH *** comparison to the growing data for atmospheric PAHs,environmental data for these compounds in terrestrial and freshwater environments remain *** have been detected in Arctic biota from terrestrial,freshwater and marine environments,indicating exposure,however,levels are generally low,as most organisms efficiently metabolize parent ***,PAH emissions are expected to decline in the future,however models suggest the Arctic may not experience the same magnitude of decline projected for other world ***,future changes in climate may contribute to a re-volatilizati

关键词： Contaminants Air Biota Pyrogenic Petrogenic Review

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Hexachlorobutadiene(HCBD)contamination in the Arctic environment:A review

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emerging Contaminants 2019年第1期5卷 116-122页

作者： jennifer e.balmer Hayley Hung Katrin Vorkamp Robert J.Letcher Derek C.G.Muir Arctic Monitoring and Assessment Programme Fram CentrePO Box 6606 Langnes9296TromsøNorway Department of Biology The Citadel171 Moultrie StreetCharlestonSC29409USA Air Quality Processes Research Section Environment and Climate Change Canada4905 Dufferin StreetTorontoOntarioM3H 5T4Canada Aarhus University Department of Environmental ScienceArctic Research CentreFrederiksborgvej 3994000RoskildeDenmark ecotoxicology and Wildlife Health Division Environment and Climate Change CanadaNational Wildlife Research CentreCarleton UniversityRaven RoadOttawaOntarioK1A 0H3Canada environment and Climate Change Canada Canada Centre for Inland Waters867 Lakeshore RoadBurlingtonONL7S 1A1Canada

Hexachlorobutadiene(HCBD)is a halogenated hydrocarbon that is primarily produced as an unintentional byproduct in the manufacture of chlorinated *** between HCBD and other persistent organic pollutants(POPs)led to its listing in 2015 for global regulation under the Stockholm Convention on ***'s toxicity and propensity for long-range transport means there is special concern for its potential impacts on Arctic *** present review comprehensively summarizes all available information of the occurrence of HCBD in the Arctic environment,including its atmospheric,terrestrial,freshwater and marine ecosystems and ***,reports of HCBD in Arctic environmental media are *** has been measured in Arctic air collected from monitoring stations in Finland and Canada,yet there is a dearth of data for other abiotic matrices(***,sediments,glacier ice,freshwaters and seawater).Low HCBD concentrations have been measured in Arctic terrestrial and marine biota,which is consistent with laboratory studies that indicate that HCBD has the potential to bioaccumulate,but not to *** data for Arctic biota suggest that terrestrial birds and mammals and seabirds,have comparatively higher HCBD concentrations than fish and marine mammals,warranting additional *** spatial and temporal trends in HCBD concentrations in the Arctic are currently limited,future monitoring of HCBD in the Arctic will be important for assessing the impact of global regulations newly-imposed by the Stockholm Convention on POPs.

关键词： POPs Air Biota Contaminants Long-range transport Review

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Levels and trends of current-use pesticides(CUPs)in the arctic:An updated review,2010-2018

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emerging Contaminants 2019年第1期5卷 70-88页

作者： jennifer e.balmer Adam D.Morris Hayley Hung Liisa Jantunen Katrin Vorkamp Frank Riget Marlene evans Magali Houde Derek C.G.Muir Arctic Monitoring and Assessment Programme Fram CentrePO Box 6606Langnes9296TromsøNorway Department of Biology The Citadel171 Moultrie StreetCharlestonSCUSA environment and Climate Change Canada National Wildlife Research CenterOttawaCanada Air Quality Processes Research Section Environment and Climate Change CanadaTorontoOntarioCanada Air Quality Processes Research Section Environment and Climate Change CanadaEgbertOntarioCanada Aarhus University Department of Environmental ScienceArctic Research CentreRoskildeDenmark Aarhus University Department of BioscienceRoskildeDenmark Aquatic ecosystem Protection Research Division Environment Canada11 Innovation BlvdSaskatoonSKS7N 3H5Canada environment and Climate Change Canada St.Lawrence CenterMontrealQuebecCanada environment and Climate Change Canada Canada Centre for Inland WatersBurlingtonOntarioCanada

Global regulations and many regional and national controls restrict the use of substances that exhibit the potential for environmental persistence and long-range ***,many current-use pesticides(CUPs)continue to be newly discovered in remote regions,including the *** present review serves as an update,summarizing newly available information for CUPs in the Arctic environment and biota published from 2010 to *** 2010,at least seven new CUPs have been measured in Arctic media:2-methyl-4-chlorophenoxyacetic acid(MCPA),metribuzin,pendimethalin,phosalone,quizalofop-ethyl,tefluthrin and *** the large number of pesticides in current use,the number measured in the Arctic is very limited,however,modelling studies have identified additional CUPs as potential Arctic contaminants that have yet to be investigated in the *** to their recent detection,reports of CUPs in the Arctic are limited,but *** have been reported in a wide range of abiotic Arctic matrices,including air,snow,ice,freshwater and seawater,indicating their capacity for long-range atmospheric transport,however,concentrations are generally low in comparison to legacy pesticides and other persistent organic pollutants(POPs).Recent food-web studies indicate CUPs can enter Arctic terrestrial and marine food chains,however,in contrast to POPs,the highest concentrations of many CUPs were found in lower trophic-level organisms,and the lowest concentrations detected in animals at the highest trophic levels(i.e,ringed seals,polar bear,caribou,and wolves)indicating significant trophic *** detection of CUPs in the remote Arctic ecosystem reinforces the need for continued monitoring of both known and potential Arctic pollutants to prevent impacts on human and environmental health as the global arsenal of pesticides used in agriculture continuously changes.

关键词： POPs Contaminants Air Biota Long-range transport Persistence

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The sexually dimorphic expression of glutamate transporters and their implication in pain after spinal cord injury

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Neural Regeneration Research 2025年第11期20卷 3317-3329页

作者： jennifer M.Colón-Mercado Aranza I.Torrado-Tapias Iris K.Salgado Jose M.Santiago Samuel e.Ocasio Rivera Dina P.Bracho-Rincon Luis H.Pagan Rivera Jorge D.Miranda Department of Physiology University of Puerto RicoMedical Sciences CampusSan JuanPRUSA National Institutes of Health National Human Genome Research InstituteBethesdaMDUSA Universidad Central del Caribe School of MedicineBayamónPRUSA University of Puerto Rico Carolina CampusCarolinaPRUSA Institute of Neurobiology San JuanPRUSA

In addition to the loss of motor function,~60% of patients develop pain after spinal cord *** cellular-molecular mechanisms are not well understood,but the data suggests that plasticity within the rostral,epicenter,and caudal penumbra of the injury site initiates a cellularmolecular interplay that acts as a rewiring mechanism leading to central neuropathic *** can lead to the formation of new connections triggering abnormal sensory *** excitatory glutamate transporters are responsible for the reuptake of extracellular glutamate which makes them a critical target to prevent neuronal hyperexcitability and *** previous studies showed a sexually dimorphic therapeutic window for spinal cord injury after treatment with the selective estrogen receptor modulator *** this study,we investigated the anti-allodynic effects of tamoxifen in male and female rats with spinal cord *** hypothesized that tamoxifen exerts anti-allodynic effects by increasing the expression of glutamate transporters,leading to reduced hyperexcitability of the secondary neuron or by decreasing aberrant *** and female rats received a moderate contusion to the thoracic spinal cord followed by subcutaneous slow-release treatment of tamoxifen or matrix pellets as a control(placebo).We used von Frey monofilaments and the“up-down method”to evaluate mechanical *** treatment decreased allodynia only in female rats with spinal cord injury revealing a sexdependent *** expression profile of glutamatergic transporters(excitatory amino acid transporter 1/glutamate aspartate transporter and excitatory amino acid transporter 2/glutamate transporter-1)revealed a sexual dimorphism in the rostral,epicenter,and caudal areas of the spinal cord with a pattern of expression primarily on *** rodents showed a significantly higher level of excitatory amino acid transporter-1 expression while male rodents showed increased

关键词： allodynia central neuropathic pain eAAT-1/GLAST eAAT-2/GLT-1 glutamate transporters selective estrogen receptor modulator sexual dimorphism spinal cord injury trauma

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A review of chlorinated paraffin contamination in Arctic ecosystems

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emerging Contaminants 2019年第1期5卷 219-231页

作者： Katrin Vorkamp jennifer balmer Hayley Hung Robert J.Letcher Frank F.Riget Aarhus University Department of Environmental ScienceArctic Research CentreRoskildeDenmark Arctic Monitoring and Assessment Programme TromsøNorway environment and Climate Change Canada Air Quality Processes Research SectionTorontoCanada ecotoxicology and Wildlife Health Division Environment and Climate Change CanadaNational Wildlife Research CentreCarleton UniversityOttawaCanada Aarhus University Department of BioscienceArctic Research CentreRoskildeDenmark Greenland Institute of Natural Resources NuukGreenland Present address:The Citadel Department of BiologyCharlestonSCUSA

Chlorinated paraffins(CPs)present a complex mixture of congeners which are often analysed and assessed as short-,medium-and long-chain CPs,***(C10eC13),SMCCP(C14eC17)and SLCCP(C18).Their complexity makes the chemical analysis challenging,in particular in terms of accurate quantification,but promising developments involving ultra-high resolution mass spectrometry have been presented *** Arctic data exist for SCCPs,while LCCPs have not yet been studied in the *** concentrations in Arctic air often exceeded those of SMCCP,usually with a predominance of the most volatile C10 congeners,and of banned persistent organic pollutants(POPs),such as polychlorinated biphenyls(PCBs).The presence of SCCPs and MCCPs in Arctic air,as well as in the Antarctic and in the remote regions of the Tibetan plateau,provides evidence of their long-range transport including sufficient environmental persistence to reach the *** vegetation accumulated SCCPs partly from air and partly through root uptake from soil,with consequences for the SCCP profile found in Arctic *** results have yet been reported for CPs in terrestrial Arctic *** for freshwater sediment and fish confirmed the long-range transport of SCCPs and MCCPs and documented their *** additional PCB data were available,SPCB was usually higher than SSCCP in freshwater *** SCCPs and MCCPs were widely present in marine Arctic biota(***,fish,seabirds,seals,whales,polar bears).In mussels and Atlantic cod,SMCCP concentrations exceeded those of SSCCP,while this was less clear for other marine *** mammals and the long-lived Greenland shark roughly had SSCCP concentrations of 100e500 ng/g lipid weight,often dominated by C11 *** appeared to be more pronounced for SSCCP than for SMCCP,but more studies will be *** SSCCP concentrations were observed in Arctic air and sediment over time,but not in beluga monitored since

关键词： Bioaccumulation Biomagnification Long-range transport MCCPs Persistent organic pollutants SCCPs

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Chemicals of emerging Arctic Concern:Preface

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emerging Contaminants 2019年第1期5卷 1-3页

作者： Cynthia A.de Wit jennifer balmer Derek C.G.Muir Katrin Vorkamp Simon Wilson Department of environmental Science and Analytical Chemistry(ACeS) Stockholm UniversitySE-10691StockholmSweden Arctic Monitoring and Assessment Programme The Fram CentreN-9296TromsøNorway Department of Biology The CitadelCharlestonSCUSA Canada Centre for Inland Waters Environment and Climate Change CanadaBurlingtonONL7S 1A1Canada Department of environmental Science Arctic Research CentreAarhus UniversityFrederiksborgvej 399PO Box 358DK-4000RoskildeDenmark

*** The Arctic Monitoring and Assessment Programme(AMAP)was established as an international program for monitoring and assessing Arctic pollution in 1991,under the Arctic environmental Protection Strategy[1].AMAP is now aWorking Group of the Arctic Council(http://***)responsible for monitoring and assessing a range of pollution-and climate change-related issues in the Arctic in order to“provide reliable and sufficient information on the status of,and threats to,the Arctic environment,and scientific advice on actions to be taken in order to support Arctic governments in their efforts to take remedial and preventive actions relating to contaminants and adverse effects of climate change”(see Ref.[2]).

关键词： Chemicals of emerging concern Arctic Persistent organic pollutants Arctic monitoring and assessment programme

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Current-use halogenated and organophosphorous flame retardants:A review of their presence in Arctic ecosystems

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emerging Contaminants 2019年第1期5卷 179-200页

作者： Katrin Vorkamp jennifer balmer Hayley Hung Robert J.Letcher Frank F.Riget Cynthia A.de Wit Aarhus University Department of Environmental ScienceArctic Research CentreRoskildeDenmark Arctic Monitoring and Assessment Programme TromsøNorway Air Quality Processes Research Section Environment and Climate Change CanadaTorontoCanada ecotoxicology and Wildlife Health Division Environment and Climate Change CanadaNational Wildlife Research CentreCarleton UniversityOttawaCanada Aarhus University Department of BioscienceArctic Research CentreRoskildeDenmark Greenland Institute of Natural Resources NuukGreenland Stockholm University Department of Environmental Science and Analytical ChemistryStockholmSweden Present address:The Citadel Department of BiologyCharlestonSCUSA.

Since the ban of polybrominated diphenyl ethers(PBDes)and hexabromocyclododecane(HBCDD),other flame retardants may be increasingly ***-one current-use halogenated(HFRs)and 24 organophosphorous flame retardants(PFRs)have been sought in Arctic ecosystems so *** measurements provide evidence of long-range atmospheric transport for the majority of these compounds,with much higher concentrations for PFRs than for *** HFRs,***(2-ethylhexyl)-tetrabromophthalate(BeH-TeBP),2-ethylhexyl-2,3,4,5-tetrabromobenzoate(eH-TBB)and hexabromobenzene(HBBz),had air concentrations comparable to those of PBDes in some *** data for seawater and ice indicate dry deposition of HFRs,while net volatilization from seawater was observed for some *** in the marine environment indicate a wide presence of HFRs in marine biota,but generally at low levels,*** lower than those of *** exist,namely 2,4,6-tribromophenyl 2,3-dibromopropyl ether(TBP-DBPe)and decabromodiphenyl ethane(DBDPe),which were found in concentrations comparable to PBDes in some *** same was the case for 2,4,6-tribromophenyl allyl ether(TBP-Ae)in a study from the terrestrial *** generally had low concentrations in biota,probably due to metabolic transformation of PFR triesters,as suggested by in vitro *** PFR concentrations occurred in some individuals,generally indicating a larger variability of PFRs in biota than found for *** commercially important tetrabromobisphenol A(TBBPA)was only detected sporadically,and only in abiotic matrices.

关键词： Bioaccumulation Brominated flame retardants Long-range transport Organophosphate esters Persistent organic pollutants

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Advancements and challenges in treating advanced gastric cancer in the West

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World Journal of Gastrointestinal Oncology 2019年第9期11卷 652-664页

作者： jennifer L Leiting Travis e Grotz Division of Hepatobiliary and Pancreas Surgery Mayo Clinic

Gastric cancer is a leading cause of cancer incidence and death *** with advanced gastric cancer benefit from a multi-modality treatment *** oncologic resection with negative margins and complete lymphadenectomy plays a crucial role in long-term survival for patients with resectable *** utilization of minimally invasive techniques for gastric cancer has been slowly increasing and is proving to be both technically and oncologically *** chemotherapy is the current standard of care for advanced gastric cancer.A variety of chemotherapy regimens have been used with the combination of docetaxel,oxaliplatin,5-fluorouracil,and leucovorin being the current recommendation given its superior ability to induce a complete pathologic response and prolong *** use of radiation has been more controversial with its optimal place in the treatment sequence being *** are current ongoing studies assessing the impact of radiation as an adjunct or in place of *** treatments(e.g.,trastuzumab for human epidermal growth factor receptor 2 positive tumors and pembrolizumab for programmed death-ligand 1 positive tumors)are showing promise and are part of a continued emphasis on individualized *** chemotherapy may also play a role in preventing peritoneal recurrences for patients with high risk *** treatment of patients with advanced gastric cancer in the West continues to advance and improve with a better understanding of optimal treatment sequences and the utilization of personalized treatment regimens.

关键词： Gastric cancer D2 lymphadenectomy Minimally invasive surgery Neoadjuvant chemotherapy Chemoradiation Targeted treatments

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Optimizing outcomes for patients with gastric cancer peritoneal carcinomatosis

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World Journal of Gastrointestinal Oncology 2018年第10期10卷 282-289页

作者： jennifer L Leiting Travis e Grotz Division of Hepatobiliary and Pancreas Surgery Mayo Clinic

Peritoneal carcinomatosis (PC) from gastric cancer has traditionally been considered a terminal progression of the disease and is associated with poor survival out-comes. Positive peritoneal cytology similarly worsens the survival of patients with gastric cancer and treatment options for these patients have been limited. Recent ad-vances in multimodality treatment regimens have led to innovative ways to care for and treat patients with this disease burden. One of these advances has been to use neoadjuvant therapy to try and convert patients with positivecytologyorlow-volume PC to negative cytolo-gy with no evidence of active peritoneal *** strategies include the use of neoadjuvant systemic chemotherapy alone,using neoadjuvant laparoscopic heated intraper itoneal chemotherapy(NLHIPeC)after systemic chemotherapy,or using neoadjuvant intra-peritoneal and systemic chemother apy(NIPS)in a bi-dir ectional manner. For patients with higher volume PC,cytoreductive surgery (CRS) and hyperthermic intrape-ritoneal chemotherapy(HIPeC)have been mainstays of treatment. When used together, CRS and HIPeC can improve overall outcomes in properly selected patients,but overall survival outcomes remain unacceptably *** extent of peritoneal disease, commonly measured by the peritoneal carcinomatosis index (PCI), and the com-pleteness of cytor eduction,has been shown to greatly impact outcomes in patients undergoing CRS and *** uses of NLHIPeC and NLHIPeC plus NIPS have both been shown to decrease the PCI and thus increase the opportunity for complete cytoreduction. Newer therapies like pressurized intraperitoneal aerosol chemother apy and immunotherapy, such as catumaxomab, along with improved systemic chemotherapeutic regimens, are being explored with great *** is exciting progress being made in the management of PC from gastric can-cer and its’ treatment is no longer futile.

关键词： Peritoneal carcinomatosis index Peritoneal carcinomatosis Gastric cancer Cytoreductive surgery Heated intraperitoneal chemotherapy Neoadjuvant intraperitoneal and systemic chemotherapy

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WJH 6^(th) Anniversary Special Issues(2): Hepatocellular carcinoma Mammalian target of rapamycin inhibition in hepatocellular carcinoma

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World Journal of Hepatology 2014年第11期6卷 776-782页

作者： René e Ashworth jennifer Wu Hematology and Medical Oncology Pro-gram NYU School of Medicine Perlmutter Cancer Center NYU Langone Medical Center Division of Hematology and Oncology NYU School of Medicine Subdivision of GI Oncology Perlmutter Cancer Center NYU Langone Medical Center Division of Hematology and Oncology

Hepatocellular carcinoma(HCC) is one of the leading causes of cancer-related death worldwide. It is associated with a poor prognosis and has limited treatment options. Sorafenib, a multi-targeted kinase inhibitor, is the only available systemic agent for treatment of HCC that improves overall survival for patients with advanced stage disease; unfortunately, an effective second-line agent for the treatment of progressive or sorafenib-resistant HCC has yet to be identified. This review focuses on components of the mammalian target of rapamycin(mTOR) pathway, its role in HCC pathogenesis, and dual mTOR inhibition as a therapeutic option with potential efficacy in advanced HCC. There are several important upstream and downstream signals in the mTOR pathway, and alternative tumor-promoting pathways are known to exist beyond mTORC1 inhibition in HCC. This review analyzes the relationships of the upstream and downstream regulators of mTORC1 and mTORC2 signaling; it also provides a comprehensive global picture of the interaction between mTORC1 and mTORC2 which demonstrates the pre-clinical relevance of the mTOR pathway in HCC pathogenesis and progression. Finally, it provides scientific rationale for dual mTORC1 and mTORC2 inhibition in the treatment of HCC. Clinical trials utilizing mTORC1 inhibitors and dual mTOR inhibitors in HCC are discussed as well. The mTOR pathway is comprised of two main components, mTORC1 and mTORC2; each has a unique role in the pathogenesis and progression of HCC. In phase Ⅲ studies, mTORC1 inhibitors demonstrate anti-tumor ac-tivity in advanced HCC, but dual mTOR(mTORC1 and mTORC2) inhibition has greater therapeutic potential in HCC treatment which warrants further clinical investigation.

关键词： Mammalian target of rapamycin hepato-cellular carcinoma Mammalian target of rapamycin complex 1 Mammalian target of rapamycin complex 2 PI3K/AKT/mTOR signaling pathway Sorafenib everoli-mus Sirolimus Liver transplantation CC-223

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