维普中文期刊产品整合服务
266篇 您的检索式:作者名="Alfonso L"
    题名 作者 年代 出处 被引量
1Mechanisms of resistance to anti-epidermal growth factor receptor inhibitors in metastatic colorectal cancer显示文摘The prognosis of patients with metastatic colorectal cancer(m CRC) remain poor despite the impressive improvement of treatments observed over the last 20 years that led to an increase in median overall survival from 6 mo, with the only best supportive care, to approximately 30 mo with the introduction of active chemotherapy drugs and targeted agents. The monoclonal antibodies(mo Abs) cetuximab and panitumumab, directed against the epidermal growth factor receptor(EGFR), undoubtedly represent a major step forward in the treatment of m CRC, given the relevant efficacy in terms of progression-free survival, overall survival, response rate, and quality of life observed in several phase Ⅲ clinical trials among different lines of treatment. However, the anti-EGFR mo Abs were shown only to be effective in a subset of patients. For instance, KRAS and NRAS mutations have been identified as biomarkers of resistance to these drugs, improving the selection of patients who might derive a benefit from these treatments. Nevertheless, several other alterations might affect the response to these drugs, and unfortunately, even the responders eventually become resistant by developing secondary(or acquired) resistance in approximately 13-18 mo. Several studies highlighted that the landscape of responsible alterations of both primary and acquired resistance to anti-EGFR drugs biochemically converge into MEK-ERK and PIK3CA-AKT pathways. In this review, we describe the currently known mechanisms of primary and acquired resistance to anti-EGFR mo Abs together with the various strategies evaluated to prevent, overcame or revert them.Vincenzo Sforza Erika Martinelli Fortunato Ciardiello Valentina Gambardella Stefania Napolitano Giulia Martini Carminia della Corte Claudia Cardone Marianna L Ferrara Alfonso Reginelli Giuseppina Liguori Giulio Belli Teresa Troiani 2016World Journal of Gastroenterology2016,22,28:6
2Fecal immunochemical test accuracy in average-risk colorectal cancer screening显示文摘AIM:To assess the fecal immunochemical test(FIT)accuracy for colorectal cancer(CRC)and advanced neoplasia(AN)detection in CRC screening.METHODS:We performed a multicentric,prospective,double blind study of diagnostic tests on asymptomatic average-risk individuals submitted to screening colonoscopy.Two stool samples were collected and the fecal hemoglobin concentration was determined in the first sample(FIT1)and the highest level of both samples(FITmax)using the OC-sensor.Areas under the curve(AUC)for CRC and AN were calculated.The best FIT1and FITmax cut-off values for CRC were determined.At this threshold,number needed to scope(NNS)to detect a CRC and an AN and the cost per lesion detected were calculated.RESULTS:About 779 individuals were included.An AN was found in 97(12.5%)individuals:a CRC in 5(0.6%)and an advanced adenoma(≥10 mm,villous histology or high grade dysplasia)in 92(11.9%)subjects.For CRC diagnosis,FIT1 AUC was 0.96(95%CI:0.95-0.98)and FITmax AUC was 0.95(95%CI:0.93-0.97).For AN,FIT1 and FITmax AUC were similar(0.72,95%CI:0.66-0.78 vs 0.73,95%CI:0.68-0.79,respectively,P=0.34).Depending on the number of determinations and the positivity threshold cut-off used sensitivity for AN detection ranged between 28%and 42%and specificity between 91%and 97%.At the best cut-off point for CRC detection(115 ng/mL),the NNS to detect a CRC were 10.2 and 15.8;and the cost per CRC was 1814€and 2985€on FIT1 and FITmax strategies respectively.At this threshold the sensitivity,NNS and cost per AN detected were 30%,1.76,and 306€,in FIT1 strategy,and 36%,2.26€and 426€,in FITmax strategy,respectively.CONCLUSION:Performing two tests does not improve diagnostic accuracy,but increases cost and NNS to detect a lesion.Vicent Hernandez Joaquin Cubiella M Carmen Gonzalez-Mao Felipe Iglesias Concepción Rivera M Begoa Iglesias Lucía Cid Ines Castro Luisa de Castro Pablo Vega Jose Antonio Hermo Ramiro Macenlle Alfonso Martínez-Turnes David Martínez-Ares Pamela Estevez Estela Cid M Carmen Vidal Angeles López-Martínez Elisabeth Hijona Marta Herreros-Villanueva Luis Bujanda Jose Ignacio Rodriguez-Prada the COLONPREV study investigators 2014World Journal of Gastroenterology2014,20,4:4
3Downregulation of the Basic Peroxidase Isoenzyme from Zinnia elegans by Gibberellic Acid显示文摘Hypocotyl formation during the epigeal germination of seedlings is under strict hormonal regulation. In a 3 d old Zinnia elegans seedling system, gibberellic acid (GA3) exerts an opposite effect to that exerted by light on hypocotyl photomorphogenesis because GA3 promotes an etiolated-like growth with an inhibition of radial (secondary) growth. For this reason, the effect of GA3 on the basic peroxidase isoenzyme from Z. elegans (ZePrx), an enzyme involved in hypocotyl lignin biosynthesis, was studied. The results showed that GA3 reduces ZePrx activity, similarly to the way in which it reduces seedling secondary growth. This hormonal response is supported by the analysis of the ZePrx promoter, which contains four types of GA3-responsive cis-elements: the W Box/O2S; the Pyr Box; the GARE; and the Amy Box. Taken together, these results suggest that ZePrx is directly regulated by GA3, with this effect matching the inhibitory effect of GA on the hypocotyl secondary growth.María Josefa López Núez-Flores Jorge Gutirrez Laura V.Gómez-Ros Esther Novo Uzal Mariana Sottomayor Alfonso Ros Barceló 2010Journal of Integrative Plant Biology2010,52,2:3
4Effect of femtosecond laser-assisted lens surgery on the optic nerve head and the macula显示文摘AIM: To evaluate the effect of femtosecond laser-assisted lens surgery(FLALS;cataract surgery or refractive lens exchange) on the structure of the optic nerve head and the macula.METHODS: This prospective longitudinal study included healthy eyes undergoing FLALS. Eyes with glaucoma or any other ocular disease that could alter optical coherence tomography results were excluded. Retinal nerve fiber layer(RNFL), Bruch’s membrane opening-minimum rim width(BMO-MRW) and macular thickness(MT) were measured preoperatively, 1 and 6 mo after surgery using spectral-domain optical coherence tomography(SD-OCT). Changes between preoperative and postoperative values were evaluated.RESULTS: A total of 87 eyes of 46 patients were included in this study. Preoperative RNFL, BMO-MRW and MT in microns(μm) were 100.77±10.39, 330.31±49.99 and 276.30±33.39, respectively. Postoperative RNFL, BMO-MRW and MT were 104.74±11.55, 348.32±54.05 and 279.83±22.65 1 mo after surgery and 102.93±11.17, 343.11±53.4 and 278.90±22.19 6 mo after surgery, respectively;which equals an increase of 3.93%, 5.45% and 1.27%,respectively, 1 mo after surgery, and 2.14%, 3.87% and 0.94% 6 mo after surgery. The differences between the preoperative and the postoperative RNFL and BMO-MRW values were statistically significant(P<0.001). Regarding MT values, there were not statistically significant differences(P=0.26).CONCLUSION: Our study suggests that FLALS does not have a negative impact on the structural status of the optic nerve head in healthy eyes, assessed by SD-OCT. There is a slight increase in the values of RNFL, BMO-MRW and MT 1 mo and 6 mo after surgery.Josefina Renones de Abajo Beatriz Estévez Jorge Jesús María González Martín Humberto Carreras Díaz Juan Francisco Loro Ferrer Alfonso Antón López 2019International Journal of Ophthalmology(English edition)2019,12,6:2
5Genetic parameters for egg number, egg weight, and eggshell color in the three Catalan poultry breeds 显示文摘Francesch A Estany J Alfonso L 1997Poult Sci1997,76,12:1
6Spectacle independence and subjective satisfaction of Re STOR multifoeal intraoeular lens after cataract or presbyopia surgery in two European eountries显示文摘Cohener B Fernandez-Vega L Alfonso JF 2010Clin Ophthalmol2010,4,:1
7Spatial variability of agricultural soil parameters in southern Spain显示文摘Francisca López-Granados Montserrat Jurado-Expósito Silvia Atenciano Alfonso García-Ferrer Manuel Sánchez de la Orden Luis García-Torres 2002Plant and Soil2002,,1:1
8Design,manufacture,stress analysis,and experimental tests of low-noise high endurance spiral bevel gears显示文摘Litivin Faydor L Alfonso Fuentes Kenichi Hayasaka 2006Mechanism and Machine Theory2006,41,:1
9Role of vitamin E and phenolic compounds in the antioxidant capacity,measured by ESR,of virgin olive,olive and sunflower oils after frying显示文摘QUILES L J CARMEN R T ALFONSO G 2002Food Chem2002,76,:1
10Outcomes and Patient Satisfaction After Presbyopic Bilateral Lens Exchange with the ReSTOR IOL in Emmetropic Patients显示文摘Alfonso JF Fernandez-- Vega L Valcarcel B 2010Cataract Refract Surg2010,1,28:1
11Dietary thyrotro- pin-releasing hormone stimulates growth rate and increases the insulin: glucagon molar ratio of broiler chickens 显示文摘Cogburn L A Liou S S Alfonso C P 1989Proc Soc Exp Biol Med1989,192,2:1
12Nitrate prmotes biological oxidation of sulfide in wastewaters:Experiment at plant-scale biotech显示文摘Juan G L Alfonso C Juan M G 2006Bioeng2006,93,4:1
13Solid mesenchymal hamartoma in an adult: a case report显示文摘Hernandez JC Alfonso C Gonzalez L 2006J Clin Pathol2006,59,5:1
14Design, generation and TCA of New Type of Asymmetricface-gear Drive with Modi fled Geometry 显示文摘Litivin F L Alfonso F Matt H 2001Computer Methods in Applied Mechanics and Engineering2001,190,3:1
15Visual function after implantation of an aspheric bifocal intraocular lens显示文摘Alfonso JF Fernandez-Vega L Amhaz H 2009Cataract Refract Surg2009,35,5:1
16Long-term evalua- tion of the central vault after phakic Collamer (R) lens ( ICL/ TICL) implantation using OCT显示文摘Alfonso JF Ferndndez-Vega L Lisa C 2012Graefes Arch Clin Exp Oph- thalmol2012,250,12:1
17Plastic ra- dii and longitudinal deformation profiles of tunnels excavatedin strain-softening rock masses显示文摘ALEJANO L R ALFONSO R VEIGA M 2012Tunnel- ling and Underground Space Technology2012,30,:1
18Design, Genera- tion, And Stress Analysis of Two Versions of Geometry of Face-Gear Drives 显示文摘Litvin F L Alfonso F Claudio Z 2002Mechanism and Machine Theory2002,37,4:1
19Detection of Dengue virus in saliva and urine by real time RT-PCR显示文摘Poloni T R Oliveira A S Alfonso H L 2010Virol J2010,7,:1
20Compu- terized integrated approach for design and stress analysis of spiral bevel gears 显示文摘Argyris John Fuentes Alfonso Litvin F L 2002Computer methods in applied mechanics and engineering2002,,19:1
返回顶部 每页显示:
共14页 首页 上一页 第1页 下一页 末页 /14 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费