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| 1 | Cellular and molecular mechanisms of intestinal fibrosis显示文摘Fibrosis is a chronic and progressive process characterized by an excessive accumulation of extracellular matrix (ECM) leading to stiffening and/or scarring of the involved tissue. Intestinal fibrosis may develop in several different enteropathies, including inflammatory bowel disease. It develops through complex cell, extracellular matrix, cytokine and growth factor interactions. Distinct cell types are involved in intestinal fibrosis, such as resident mesenchymal cells (fibroblasts, myofibroblasts and smooth muscle cells) but also ECM-producing cells derived from epithelial and endothelial cells (through a process termed epithelialand endothelial-mesenchymal transition), stellate cells, pericytes, local or bone marrow-derived stem cells. The most important soluble factors that regulate the activation of these cells include cytokines, chemokines, growth factors, components of the renin-angiotensin system, angiogenic factors, peroxisome proliferator-activated receptors, mammalian target of rapamycin, and products of oxidative stress. It soon becomes clear that although inflammation is responsible for triggering the onset of the fibrotic proc-ess, it only plays a minor role in the progression of this condition, as fibrosis may advance in a self-perpetuating fashion. Definition of the cellular and molecular mechanisms involved in intestinal fibrosis may provide the key to developing new therapeutic approaches. | Silvia Speca Ilaria Giusti Florian Rieder Giovanni Latella | 2012 | World Journal of Gastroenterology2012,18,28: | 32 |
| 2 | Application of poly-lactide-co-glycolide-microspheres in the transarterial chemoembolization in an animal model of hepatocellular carcinoma显示文摘AIM:To introduce an animal model of hepatocellular carcinoma (HCC) in ACI-rats, and to evaluate the therapeutic effects of Poly-lactide-co-glycolide(PIcg)-microspheres in the transarterial chemoembolization (TACE) in this model, as well the value of this model in the experiments of interventional therapy. | Jochen Truebenbach Florian Graepler Philippe Pereira Peter Huppert Thomas Eul Gundula Wiemann Claus Claussen | 2003 | World Journal of Gastroenterology2003,9,1: | 24 |
| 3 | Trastuzumab in combination with chemotherapy versus chemotherapy alone for treatment of HER2-positive advanced gastric or gastro-oesophageal junction cancer (ToGA): a phase 3, open-label, randomised controlled trial显示文摘 | Yung-Jue Bang Eric Van Cutsem Andrea Feyereislova Hyun C Chung Lin Shen Akira Sawaki Florian Lordick Atsushi Ohtsu Yasushi Omuro Taroh Satoh Giuseppe Aprile Evgeny Kulikov Julie Hill Michaela Lehle Josef Rüschoff Yoon-Koo Kang | 2010 | The Lancet2010,,9742: | 20 |
| 4 | BOTTOM MESONS(B=±1)B^+=u,B^0=d,B^0=db,B^-=b,similarly for B~*'s显示文摘B-particle organization Many measurements of 8 decays involve admixtures of B hadrons.Previously we arbitrarily included such admixtures in the B~±section,but because of their importance we have created two new sections:B~±/B^0 Admixture'for T(4S)results and'B~±/B^0/B_(s^0)/b-baryon Admixture'for results at higher energies.Most inclusive decay branching fractions and x_b at high energy are found in the Admixture sections.B^0-B^0mixing data are found in the 6°section,while B_(s^0)-B_(S^0)mixing data and B-B mixing data for a B^0/B_(s^0)admixture are found in the B_(s^0)section.CP-violation data are found in the B~±,S^0,and B~±B^0 Admixture sections.b-baryons are found near the end of the Baryon section.Recently,we also created a new section:'V_(cb) | K.A.Olive K.Agashe C.Amsler M.Antonelli J.-F.Arguin D.M.Asner H.Baer H.R.Band R.M.Barnett T.Basaglia C.W.Bauer J.J.Beatty V.I.Belousov J.Beringer G.Bernardi S.Bethke H.Bichsel O.Biebe E.Blucher S.Blusk G.Brooijmans O.Buchmueller V.Burkert M.A.Bychkov R.N.Cahn M.Carena A.Ceccucci A.Cerr D.Chakraborty M.-C.Chen R.S.Chivukula K.Copic G.Cowan O.Dahl G.D'Ambrosio T.Damour D.de Florian A.de Gouvea T.DeGrand P.de Jong G.Dissertor B.A.Dobrescu M.Doser M.Drees H.K.Dreiner D.A.Edwards S.Eidelman J.Erler V.V.Ezhela W.Fetscher B.D.Fields B.Foster A.Freitas T.K.Gaisser H.Gallagher L.Garren H.-J.Gerber G.Gerbier T.Gershon T.Gherghetta S.Golwala M.Goodman C.Grab A.V.Gritsan C.Grojean D.E.Groom M.Grnewald A.Gurtu T.Gutsche H.E.Haber K.Hagiwara C.Hanhart S.Hashimoto Y.Hayato K.G.Hayes M.Heffner B.Heltsley J.J.Hernandez-Rey K.Hikasa A.Hocker J.Holder A.Holtkamp J.Huston J.D.Jackson K.F.Johnson T.Junk M.Kado D.Karlen U.F.Katz S.R.Klein E.Klempt R.V.Kowalewski F.Krauss M.Kreps B.Krusche Yu.V.Kuyanov Y.Kwon O.Lahav J.Laiho P.Langacker A.Liddle Z.Ligeti C.-J.Lin T.M.Liss L.Littenberg K.S.Lugovsky S.B.Lugovsky F.Maltoni T.Mannel A.V.Manohar W.J.Marciano A.D.Martin A.Masoni J.Matthews D.Milstead P.Molaro K.Monig F.Moortgat M.J.Mortonson H.Murayama K.Nakamura M.Narain P.Nason S.Navas M.Neubert P.Nevski Y.Nir L.Pape J.Parsons C.Patrignani J.A.Peacock M.Pennington S.T.Petcov Kavli IPMU A.Piepke A.Pomarol A.Quadt S.Raby J.Rademacker G.Raffel B.N.Ratcliff P.Richardson A.Ringwald S.Roesler S.Rolli A.Romaniouk L.J.Rosenberg J L.Rosner G.Rybka C.T.Sachrajda Y.Sakai G.P.Salam S.Sarkar F.Sauli O.Schneider K.Scholberg D.Scott V.Sharma S.R.Sharpe M.Silari T.Sjostrand P.Skands J.G.Smith G.F.Smoot S.Spanier H.Spieler C.Spiering A.Stahl T.Stanev S.L.Stone T.Sumiyoshi M.J.Syphers F.Takahashi M.Tanabashi J.Terning L.Tiator M.Titov N.P.Tkachenko N.A.Tornqvist D.Tovey G.Valencia G.Venanzoni M.G.Vincter P.Vogel A.Vogt S.P.Wakely W.Walkowiak C.W.Walter D.R.Ward G.Weiglein D.H.Weinberg E.J.Weinberg M.White L.R.Wiencke C.G.Wohl L.Wolfenstein J.Womersley C.L.Woody R.L.Workman A.Yamamoto W.-M.Yao G.P.Zeller O.V.Zenin J.Zhang R.-Y.Zhu F.Zimmermann P.A.Zyla G.Harper V.S.Lugovsky P.Schaffner | 2014 | Chinese Physics C2014,38,9: | 20 |
| 5 | 念青唐古拉山西段冰川1977-2010年时空变化显示文摘青藏高原现代冰川变化是对气候变化的响应,对区域水资源评估有着重要的理论意义和现实意义.采用GIS分析方法,利用三期卫星遥感数据研究青藏高原中部念青唐古拉山西段冰川在2个时间段(1977-2001和2001-2010)的时空分布和变化,并对比分析其在南坡和北坡变化速率趋势以及在不同海拔高度的变化特征.研究发现:(1)2010年念青唐古拉山西段冰川面积为571.81±16.01km2,主要分布在5500~6200m的高山区;(2)1977-2010年念青唐古拉山西段冰川退缩明显,总面积减少22.42%±2.90%;(3)相比于1977-2001年时间段,近十年来该区冰川退缩速率呈明显加剧趋势;(4)与前一个时段相比,低于5700m海拔区域,各海拔段的冰川年均面积退缩速率呈减缓趋势;而在5700~7000m海拔区域,则呈加剧趋势;(5)北坡冰川退缩率(23.6%±2.88%)高于南坡(21.97%±2.90%),且南北坡2001-2010年年均冰川面积减少最大的海拔段比1977-2001年都升高了200m,研究区冰川的持续退缩有向高海拔转移的趋势;(6)南坡拉萨河流域内的冰川年均减少面积最大的海拔段比北坡高100m左右.气温升高是影响近十年以来研究区的冰川退缩加剧的根本原因,将对区域水文和生态环境产生重大的影响. | 王旭 周爱国 SIEGERT Florian 张志 陈昆仑 | 2012 | 地球科学(中国地质大学学报)2012,37,5: | 19 |
| 6 | EGFR and HER2 expression in advanced biliary tract cancer显示文摘AIM:To analyze the pathogenetic role and potential clinical usefulness of the epidermal growth factor receptor(EGFR)and the human epidermal growth factor receptor 2(HER2)in patients with advanced biliary tract cancer(BTC). METHODS:EGFR and HER2 expression was studied in biopsy samples from 124 patients(51%women; median age 64.8 years),with advanced BTC diagnosed between 1997 and 2004.Five micrometers sections of paraffin embedded tissue were examined by standard, FDA approved immunohistochemistry.Tumors with scores of 2+or 3+for HER2 expression on immunochemistry were additionally tested for HER2 gene amplification by fluorescence in situ hybridisation(FISH).RESULTS:34/124 patients(27.4%)had gallbladder cancer,47(37.9%)had intrahepatic BTC and 43(34.7%)had extrahepatic or perihilar BTC.EGFR expression was examined in a subset of 56 samples. EGFR expression was absent in 22/56 tumors(39.3%). Of the remaining samples expression was scored as 1+in 12(21.5%),2+in 13(23.2%)and 3+in 9(16%), respectively.HER2 expression was as follows:score 0 73/124(58.8%),score 1+27/124(21.8%),score 2+ 21/124(17%)and score 3+4/124(3.2%).HER2 gene amplification was present in 6/124,resulting in an overall amplification rate of 5%. CONCLUSION:Our data suggest that routine testing and therapeutic targeting of HER2 does not seem to be useful in patients with BTC,while targeting EGFR may be promising. | Jan Harder Oliver Waiz Florian Otto Michael Geissler Manfred Olschewski Brigitte Weinhold Hubert E Blum Annette Schmitt-Graeff Oliver G Opitz | 2009 | World Journal of Gastroenterology2009,15,36: | 18 |
| 7 | Immunity, Inflammation, and Cancer显示文摘 | Sergei I. Grivennikov Florian R. Greten Michael Karin | 2010 | Cell2010,,6: | 16 |
| 8 | Yb-doped large-pitch fibres: effective single-mode operation based on higher-order mode delocalisation显示文摘Rare earth-doped fibres are a diode-pumped,solid-state laser architecture that is highly scalable in average power.The performance of pulsed fibre laser systems is restricted due to nonlinear effects.Hence,fibre designs that allow for very large mode areas at high average powers with diffraction-limited beam quality are of enormous interest.Ytterbium-doped,rod-type,large-pitch fibres(LPF)enable extreme fibre dimensions,i.e.,effective single-mode fibres with mode sizes exceeding 100 times the wavelength of the guided radiation,by exploiting the novel concept of delocalisation of higher-order transverse modes.The non-resonant nature of the operating principle makes LPF suitable for high power extraction.This design allows for an unparalleled level of performance in pulsed fibre lasers. | Jens Limpert Fabian Stutzki Florian Jansen Hans-Jurgen Otto Tino Eidam Cesar Jauregui Andreas Tunnermann | 2012 | Light(Science & Applications)2012,1,1: | 16 |
| 9 | Neurotherapeutic potential of erythropoietin after ischemic injury of the central nervous system显示文摘Erythropoietin (EPO) is one of the most successful biopharmaceuticals in history and is used for treating anemia of different origins. However, it became clear that EPO could also work in a neuroprotective, antiapoptotic, antioxidative, angiogenetic and neurotropic way. It causes stimulation of cells to delay cell apoptosis, especially in the central nervous system. In rodent models of focal cerebral ischemia, EPO showed an impressive reduction of infarct size by 30% and improvement of neurobehavioral outcome by nearly 40%. A large animal model dealing with ischemia and reperfusion of the spinal cord showed that EPO could reduce the risk of spinal cord injury significantly. In addition, some clinical studies tested whether EPO works in real live clinical settings. One of the most promising studies showed the innocuousness and improvements in follow-up, outcome scales and in infarct size, of EPO-use in humans suffering from ischemic stroke. Another study ended unfortunately in a negative outcome and an increased overall death rate in the EPO group. The most possible reason was the involvement of patients undergoing simultaneously systemic thrombolysis with recombinant tissue plasminogen activator. An experimental study on rats demonstrated that administration of EPO might exacerbate tissue plasminogen activator-induced brain hemorrhage without reducing the ischemic brain damage. This case shows clearly how useful animal models can be to check negative side effects of a treatment before going into clinical trials. Other groups looked in human trials at the effects of EPO on the outcome after ischemic stroke, relation to circulating endothelial progerdtor cells, aneurysmal subarachnoid hemorrhage, traumatic brain injury, hemoglobin transfusion thresholds and elective first-time coronary artery bypass surgery. Most of the results were pos-让ive, but are based mostly on small group sizes. However, some of the most neglected facts when focusing on experimental setups of ischemia of the central nervous system are issues like age and comorbidities. It might be extremely worthy to consider these points for future projects, because EPO might influence all these factors. | Florian Simon Nicolaos Floros Wiebke Ibing Hubert Schelzig Artis Knapsis | 2019 | Neural Regeneration Research2019,14,8: | 15 |
| 10 | Laparoscopic surgery:A qualified systematic review显示文摘AIM: To review current applications of the laparoscopic surgery while highlighting the standard procedures across different fields.METHODS: A comprehensive search was undertaken using the Pub Med Advanced Search Builder. A total of 321 articles were found in this search. The following criteria had to be met for the publication to be selected: Review article, randomized controlled trials, or metaanalyses discussing the subject of laparoscopic surgery. In addition, publications were hand-searched in the Cochrane database and the high-impact journals. A total of 82 of the findings were included according to matching the inclusion criteria. Overall, 403 full-text articles were reviewed. Of these, 218 were excluded due to not matching the inclusion criteria. RESULTS: A total of 185 relevant articles were identified matching the search criteria for an overview of the current literature on the laparoscopic surgery. Articles covered the period from the first laparoscopic application through its tremendous advancement over the last several years. Overall, the biggest advantage of the procedure has been minimizing trauma to the abdominal wall compared with open surgery. In the case of cholecystectomy, fundoplication, and adrenalectomy, the procedure has become the gold standard without being proven as a superior technique over the open surgery in randomized controlled trials. Faster recovery, reduced hospital stay, and a quicker return to normal activities are the most evident advantages of the laparoscopic surgery. Positive outcomes, efficiency, a lower rate of wound infections, and reduction in the perioperative morbidity of minimally invasive procedures have been shown in most indications. CONCLUSION: Improvements in surgical training and developments in instruments, imaging, and surgical techniques have greatly increased safety and feasibility of the laparoscopic surgical procedures. | Alexander Buia Florian Stockhausen Ernst Hanisch | 2015 | World Journal of Methodology2015,5,4: | 15 |
| 11 | Capecitabine and cisplatin with or without cetuximab for patients with previously untreated advanced gastric cancer (EXPAND): a randomised, open-label phase 3 trial显示文摘 | Florian Lordick Yoon-Koo Kang Hyun-Cheol Chung Pamela Salman Sang Cheul Oh Gy?rgy Bodoky Galina Kurteva Constantin Volovat Vladimir M Moiseyenko Vera Gorbunova Joon Oh Park Akira Sawaki Ilhan Celik Heiko G?tte Helena Melezínková Markus Moehler | 2013 | Lancet Oncology2013,,6: | 14 |
| 12 | Impact of crystalline and amorphous iron-and aluminum hydroxides on mechanisms of phosphate adsorption and desorption显示文摘Fourier-transform infrared(FT-IR) spectroscopic experiments were carried out during phosphate adsorption on highly crystalline gibbsite, poorly crystalline 2-line-ferrihydrite and amorphous iron–aluminum–hydroxide mixtures in the molar ratio 1:0, 10:1, 5:1, 1:1, 1:5, 1:10 and 0:1. The OH stretching vibrational bands were utilized to analyze changes in structural and surface OH groups during adsorption, because the position of characteristic P\O vibrational bands can shift depending on reaction conditions, pH or adsorbed phosphate content.Adsorption and desorption kinetics were studied at pH6 and different initial phosphate concentrations to achieve varying phosphate coverage on the mineral surfaces. For gibbsite the formation of AlHPO_4 and Al_2HPO_4 can be assumed, while for ferrihydrite, a FeHPO_4 or Fe_2PO_4 complex and the precipitation of FePO_4 with longer equilibration time were proposed.Fe_2HPO_4 or a Fe_2PO_4 surface complex was deduced for Fe-hydroxides, an AlH_2PO_4 surface complex was identified for Al-hydroxide, and both displayed either hydrogen bonds to neighboring hydroxyl groups or hydrogen bonds to outer-sphere complexes. Fe:Al-hydroxide mixtures with high Al ratios showed a low phosphate desorption rate, while ferrihydrite and the Fe:Al-hydroxide mixtures with high Fe ratios had almost negligible desorption rates. It was concluded that within the weakly associated amorphous FeO(OH) materials, FePO_4 precipitated, which was bound by outer-sphere hydrogen bonds. With high Al ratios, desorption increased, which indicated weaker phosphate binding of both inner-sphere and outer-sphere complexes and hence, either no or minor quantities of precipitate. Ferrihydrite showed a more rigid structure and a lower extent of precipitation compared to amorphous Fe-hydroxide. | Stella Gypser Florian Hirsch Anja M.Schleicher Dirk Freese | 2018 | Journal of Environmental Sciences2018,30,8: | 14 |
| 13 | Are there new approaches for diagnosis, therapy guidance and outcome prediction of sepsis?显示文摘Beside many efforts to improve outcome, sepsis is still one of the most frequent causes of death in critically ill patients. It is the most common condition with high mortality in intensive care units. The complexity of the septic syndrome comprises immunological aspects- i.e.,sepsis induced immunosuppression- but is not restricted to this fact in modern concepts. So far, exact mechanisms and variables determining outcome and mortality stay unclear. Since there is no typical risk profile, early diagnosis and risk stratification remain difficult, which hinders rapid and effective treatment initiation. Due to the heterogeneous nature of sepsis, potential therapy options should be adapted to the individual. Biomarkers like C-reactive protein and procalcitonin are routinely used as complementary tools in clinical decision-making. Beyond the acute phase proteins, a wide bunch of promising substances and non-laboratory tools with potential diagnostic and prognostic value is under intensive investigation. So far, clinical decision just based on biomarker assessment is not yet feasible. However, biomarkers should be considered as a complementary approach. | Dubravka Kojic Benedikt H Siegler Florian Uhle Christoph Lichtenstern Peter P Nawroth Markus A Weigand Stefan Hofer Thorsten Brenner | 2015 | World Journal of Experimental Medicine2015,5,2: | 14 |
| 14 | High order aberration and straylight evaluation after cataract surgery with implantation of an aspheric,aberration correcting monofocal intraocular lens显示文摘·AIM: To evaluate the quality of vision in respect to high order aberrations and straylight perception after implantation of an aspheric, aberration correcting,monofocal intraocular lens(IOL).·METHODS: Twenty-one patients(34 eyes) aged 50 to83 y underwent cataract surgery with implantation of an aspheric, aberration correcting IOL(Tecnis ZCB00,Abbott Medical Optics). Three months after surgery they were examined for uncorrected(UDVA) and corrected distance visual acuity(CDVA), contrast sensitivity(CS)under photopic and mesopic conditions with and without glare source, ocular high order aberrations(HOA, Zywave II) and retinal straylight(C-Quant).· RESULTS: Postoperatively, patients achieved a postoperative CDVA of 0.0 log MAR or better in 97.1% of eyes. Mean values of high order abberations were +0.02±0.27(primary coma components) and-0.04 ±0.16(spherical aberration term). Straylight values of the C-Quant were 1.35±0.44 log which is within normal range of age matched phakic patients. The CS measurements under mesopic and photopic conditions in combination with and without glare did not show any statistical significance in the patient group observed(P ≥0.28).· CONCLUSION: The implantation of an aspherical aberration correcting monofocal IOL after cataractsurgery resulted in very low residual higher order aberration(HOA) and normal straylight. | Florian T A Kretz Tamer Tandogan Ramin Khoramnia Gerd U Auffarth | 2015 | International Journal of Ophthalmology(English edition)2015,8,4: | 14 |
| 15 | Characteristics of developing scour-holes at a sand-embedded cylinder显示文摘Characteristics of developing scour-holes at a sand-embedded 0.2 m diameter circular cylinder are presented. Non-intrusive, high-resolution topographic measurements of developing scour-holes were made with an experimental installation using a laser distance sensor (LDS) and precision step-motors. A clear-water experiment was conducted with bed shear stress equal to 95% of the critical bed shear stress for the initiation of sediment motion at the undisturbed plane sand bed with a d50 of 0.26 mm. During the running experiment of 21 hours duration, measurements were taken by the LDS in different azimuthal half-planes with θ = 0, 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165 and 180o in order to study the spatio-temporal variation of geometric properties in developing scour-holes. After 21 hours, the equilibrium condition was approached, with a scour rate less than d50 per hour. Measurement of maximum scour depth in different azimuthal half-planes at different points in time during the experiment show that scour started at the cylinder side and surrounded the cylinder after about 20% of experiment time. Slopes of developing scour-holes presented three regions with different inclinations, which were attributed to vortex action. Both maximum scour depth and maximum scour radius at different azimuthal half-planes are well correlated with the maximum scour depth at plane with θ = 0o. When providing maximum scour depth at the cylinder front, the presented correlations are useful for simple calculation of scour-hole topography. This work provides an experimental database for advanced numerical simulation for loose sediment hydraulics. | Oscar LINK Florian PFLEGER Ulrich ZANKE | 2008 | International Journal of Sediment Research2008,23,3: | 12 |
| 16 | Root and leaf functional trait relations in Poaceae species: implications of differing resource- acquisition strategies显示文摘Aims root systems play an essential role in grassland functioning in both acquisition and storage of resources.Nevertheless,root functional traits have not received as much attention as those measured on above-ground organs,and little is known about their relations.our objec-tives were to test whether morphological and root system traits allowed identification of grass species’functional strategies and to determine whether a relation exists between above-and below-ground traits.Methods Functional traits of root tissues(specific root length,diameter,tissue density and nitrogen concentration),whole root systems(root mass,root length density,root mass percentage below a depth of 20 cm and fine root%)and two major leaf traits(specific leaf area and leaf dry matter content)were determined under field conditions and their rela-tions were analysed in eleven perennial temperate Poaceae species.Important Findings Canonical correspondence analysis along axis 1 revealed a gra-dient of species,from those with deep,dense and coarse root systems with a large root mass to those with shallow root sys-tems,thin roots and high specific root length;this suggests strong correlations among root traits.Correlations between specific root length and specific leaf area reveal two groups of species,which probably indicates different drought-tolerance capacities.root trait syndromes enable ranking grasses along a gradient from conservative-strategy species(from stressful habitats),which display a deep and coarse root system,to acquisitive species(from rich and moist meadows),which display a shallow and thin root system.although both types display similar above-ground strategies,drought-tolerant species have lower specific root lengths than drought-sensitive species,revealing more conservative root strategies. | Florian Fort Claire Jouany Pablo Cruz | 2013 | Journal of Plant Ecology2013,6,3: | 11 |
| 17 | 高糖通过血清和糖皮质激素诱导的蛋白激酶1通路促进人近端肾小管上皮细胞合成纤连蛋白显示文摘目的 研究血清和糖皮质激素诱导的蛋白激酶1(SGK1)在高糖诱导人近端肾小 管上皮细胞(HKC)产生纤连蛋白(FN)中的作用,探讨SGK1在糖尿病肾病(DN)肾小管间质纤 维化中的作用机制。方法 将带有SGK1显性激活型突变体质粒(pIRES2-EGFP-S422DSGK1 mutant, SD)和带有SGK1显性失活型突变体质粒(pIRES2-EGFP-K127NSNSGK1 mutant,KN)分别瞬时转染 HKC;同时,设空质粒(pIRES2-EGFP,FP)转染组和未转染组(NT)为对照。分别用正常糖(NG, 5.5 mnlol/L D-葡萄糖)和高糖(HG,25 mmol/L D-葡萄糖)刺激8 h后,采用RT-PCR和Western 印迹来观察SGK1和FN的mRNA及蛋白的表达。结果 正常葡萄糖环境下转染SD和KN后, HKC合成的FN mRNA和蛋白的表达没有显著性改变。高糖环境下,转染SD的HKC与其它组 比较,其SGK1mRNA表达显著性增高(P<0.01),SGK1蛋白过度活化(P<0.01),其FN mRNA和 蛋白的表达显著增加(P<0.01)。转染KN的HKC与其它高糖组HKC比较,其活化的SGK1蛋 白显著减少(P<0.01),其合成FN mRNA和蛋白亦显著减少(P<0.01)。结论 高糖诱导HKC 的FN mRNA和蛋白的表达增加是依赖于SCK1的表达与活化,提示在DN中,高糖能通过SGK1 介导的信号通路来诱导人近端肾小管上皮细胞过度合成FN,促进肾小管间质纤维化。 | 王全胜 张晓丽 王玉梅 张阿丽 邓安国 朱忠华 Florian Lang 冯玉锡 | 2005 | 中华肾脏病杂志2005,21,4: | 10 |
| 18 | Stand structure and height-diameter relationship of a degraded Populus euphratica forest in the lower reaches of the Tarim River, Northwest China显示文摘Understanding stand structure and height-diameter relationship of trees provides very useful information to establish appropriate countermeasures for sustainable management of endangered forests. Populus euphratica, a dominant tree species along the Tarim River watershed, plays an irreplaceable role in the sustainable development of regional ecology, economy and society. However, as the result of climate changes and human activities, the natural riparian ecosystems within the whole river basin were degraded enormously, particularly in the lower reaches of the river where about 320 km of the riparian forests were either highly degraded or dead. In this study, we presented one of the main criteria for the assessment of vitality of P. euphratica forests by estimating the defoliation level, and analyzed forest structure and determined the height-diameter(height means the height of a tree and diameter means the diameter at breast height(DBH) of a tree) relationship of trees in different vitality classes(i.e. healthy, good, medium, senesced, dying, dead and fallen). Trees classified as healthy and good accounted for approximately 40% of all sample trees, while slightly and highly degraded trees took up nearly 60% of total sample trees. The values of TH(tree height) and DBH ranged from 0–19 m and 0–125 cm, respectively. Trees more than 15 m in TH and 60 cm in DBH appeared sporadically. Trees in different vitality classes had different distribution patterns. Healthy trees were mainly composed more of relatively younger trees than of degraded tress. The height-diameter relationships differed greatly among tress in different vitality classes, with the coefficients ranging from 0.1653 to 0.6942. Correlation coefficients of TH and DBH in healthy and good trees were higher than those in trees of other vitality classes. The correlation between TH and DBH decreased with the decline of tree vitality. Our results suggested that it might be able to differentiate degraded P. euphratica trees from healthy trees by determining the height-diameter correlation coefficient, and the coefficient would be a new parameter for detecting degradation and assessing sustainable management of floodplain forests in arid regions. In addition, tree vitality should be taken into account to make an accurate height-diameter model for tree height prediction. | AISHAN Tayierjiang HALIK ümüt Florian BETZ TIYIP Tashpolat DING Jianli NUERMAIMAITI Yiliyasijiang | 2015 | Journal of Arid Land2015,7,4: | 10 |
| 19 | 输水影响下胡杨胸径生长量时空变化显示文摘以塔里木河下游14次人工输水对荒漠河岸林修复过程的生态效益评估为长期目标,利用近10 a在塔里木河下游阿拉干断面的大量野外调查数据,探讨了胡杨胸径在不同时间和空间尺度上对人工输水的响应。结果显示,随着输水次数和输水量的稳步增加,河道两边地下水位逐渐抬升,胡杨胸径生长量明显增大;但是,由于不同年间输水次数、输水季节和输水量有差异,各年间胡杨胸径生长量呈现出不同的增加趋势,胸径生长量与河道输水量大小相互对应,累计输水量与胸径生长量成正比,两者之间的指数函数模型拟合度为0.928。随着离河道距离的增加,地下水位抬升不明显,胡杨胸径生长量也逐渐变小,胸径生长量与离河道距离之间的回归模型拟合度为0.965,离河道距离与胸径生长量成反比。离河道距离与不同胸径级胡杨胸径生长量之间的回归模型拟合度(以胸径级增大的趋势)分别为0.876,0.879,0.849和0.837;与胸径级增大的趋势耦合。由此得出,胸径级大的胡杨胸径生长量随离河道距离的变化差异没有比胸径级小的胡杨大,说明胡杨胸径级越大(即胡杨进入老龄阶段),其胸径生长量与地下水埋深之间的关系则不明显。 | 买尔当.克依木 玉米提.哈力克 BETZ Florian 古力比亚.乌买尔 古丽卡玛尔.迪力木拉提 | 2016 | 森林与环境学报2016,36,2: | 9 |
| 20 | Multi-scale phylogenetic structure in coastal dune plant communities across the globe显示文摘Aims Studies integrating phylogenetic history and large-scale community assembly are few,and many questions remain unanswered.Here,we use a global coastal dune plant data set to uncover the important factors in community assembly across scales from the local filtering processes to the global long-term diversification and dispersal dynamics.Coastal dune plant communities occur worldwide under a wide range of climatic and geologic conditions as well as in all biogeographic regions.However,global patterns in the phylogenetic composition of coastal dune plant communities have not previously been studied.Methods The data set comprised vegetation data from 18463 plots in New Zealand,South Africa,South America,North America and Europe.The phylogenetic tree comprised 2241 plant species from 149 families.We calculated phylogenetic clustering(Net Relatedness Index,NRI,and Nearest Taxon Index,NTI)of regional dune floras to estimate the amount of in situ diversification relative to the global dune species pool and evaluated the relative importance of land and climate barriers for these diversification patterns by geographic analyses of phylogenetic similarity.We then tested whether dune plant communities exhibit similar patterns of phylogenetic structure within regions.Finally,we calculated NRI for local communities relative to the regional species pool and tested for an association with functional traits(plant height and seed mass)thought to vary along sea–inland gradients.Important Findings Regional species pools were phylogenetically clustered relative to the global pool,indicating regional diversification.NTI showed stronger clustering than NRI pointing to the importance of especially recent diversifications within regions.The species pools grouped phylogenetically into two clusters on either side of the tropics suggesting greater dispersal rates within hemispheres than between hemispheres.Local NRI plot values confirmed that most communities were also phylogenetically clustered within regions.NRI values decreased with increasing plant height and seed mass,indicating greater phylogenetic clustering in communities with short maximum height and good dispersers prone to wind and tidal disturbance as well as salt spray,consistent with environmental filtering along sea–inland gradients.Height and seed mass both showed significant phylogenetic signal,and NRI tended to correlate negatively with both at the plot level.Low NRI plots tended to represent coastal scrub and forest,whereas high NRI plots tended to represent herb-dominated vegetation.We conclude that regional diversification processes play a role in dune plant community assembly,with convergence in local phylogenetic community structure and local variation in community structure probably reflecting consistent coastal-inland gradients.Our study contributes to a better understanding of the globally distributed dynamic coastal ecosystems and the structuring factors working on dune plant communities across spatial scales and regions. | Ane Kirstine Brunbjerg Jeannine Cavender-Bares Wolf L.Eiserhardt Rasmus Ejrnæs Lonnie W.Aarssen Hannah L.Buckley Estelle Forey Florian Jansen Jens Kattge Cynthia Lane Roy A.Lubke Angela T.Moles Ana Laura Monserrat Robert K.Peet Julissa Roncal Louise Wootton Jens-Christian Svenning | 2014 | Journal of Plant Ecology2014,7,2: | 9 |