维普中文期刊产品整合服务
30488篇 您的检索式:作者名="LI R"
    题名 作者 年代 出处 被引量
1Laparoscopic Partial Nephrectomy With Segmental Renal Artery Clamping:Technique and Clinical Outcomes显示文摘Background:Warm ischemic injury is one of the most important factors affecting renal function in partial nephrectomy(PN).The technique of segmental renal artery clamping emerges as an alternative to conventional renal artery clamping for renal hilar control.Objective:To evaluate the feasibility and efficiency of laparoscopic PN(LPN) with segmental renal artery clamping in comparison with the conventional technique.Design,setting,and participants:A total of 75 patients underwent LPN from June 2007 to November 2009.All patients had T1a or T1b tumor in one kidney and a normal contralateral kidney.Thirty-seven patients underwent surgeries with main renal artery clamping,and 38 underwent surgeries with segmental artery clamping.Intervention:All procedures were performed by the same laparoscopic surgeon.Measurements:Blood loss,operation time,warm ischemia(WI) time,and complications affected renal function before and after operation were recorded.Results and limitations:All LPNs were completed without conversion to open surgery or nephrectomy.The novel technique slightly increased WI time(p < 0.001) and intraoperative blood loss(p = 0.006),while it provided better postoperative affected renal function(p < 0.001) compared with the conventional technique.The total complication rate was 12%.Among the 38 cases where segmental renal artery clamping was performed,7 had to convert to the conventional method.Tumor size and location influenced the number of clamped segmental arteries.Long-term postoperative renal function is still awaited.Conclusions:LPN with segmental artery clamping is safe and feasible in clinical practice.It minimizes the intraoperative WI injury and improves early postoperative affected renal function compared with main renal artery clamping.(C) 2010 European Association of Urology.Published by Elsevier B.V.All rights reserved.Shao,P.F. Qin,C. Yin,C.J. Meng,X.X. Ju,X.B. Li,J. Lü,Q.A. Zhang,W. Xu,Z.Q.Shao,Pengfei Qin,Chao Yin,Changjun Meng,Xiaoxin Ju,Xiaobing Li,Jie Lü,Qiang Zhang,Wei Xu,Zhengquan] Nanjing Med Univ,Affiliated Hosp 1,Dept Urol,Nanjing,Peoples R China.Guangzhou Rd 300,Nanjing 210029,Peoples R China. 2011南京医科大学学报(自然科学版)2011,31,7:123
22019新型冠状病毒基因组特征和流行病学:病毒起源和受体结合的意义显示文摘研究者对来自9例新型冠状病毒肺炎住院患者的支气管肺泡灌洗液样本和培养的分离株进行了下一代测序。从这些个体中获得了严重急性呼吸综合征-冠状病毒2(severe acute respiratory syndrome-coronavirus 2,SARS-CoV-2)的完整和部分基因组序列。利用Sanger测序连接病毒重叠群以获得全长基因组,cDNA末端快速扩增确定终端区。对这些SARSCoV-2基因组和其他冠状病毒基因组进行了系统进化分析,以确定该病毒的进化史并有助于推断其可能的起源。刘青(译) 刘莉(审校) Lu R Zhao X Li J Niu P Yang B Wu H Wang W Song H Huang B Zhu N Bi Y Ma X Zhan F Wang L Hu T Zhou H Hu Z Zhou W Zhao L Chen J Meng Y Wang J Lin Y Yuan J Xie Z Ma J Liu WJ Wang D Xu W Holmes EC Gao GF Wu G Chen W Shi W Tan W 2020中华高血压杂志2020,28,3:516
3代谢产物右旋羟戊二酸抑制FTO/m6A/Myc/CEBPA通路的抗肿瘤作用显示文摘贝克曼研究所陈建军教授、芝加哥大学生化研究所何川教授、浙江大学附属第一医院血液科金洁教授及其研究团队合作发现:异柠檬酸脱氢酶(ISOdehydrogenase,IDH)突变造成的代谢产物右旋羟戊二酸(R-2-hydroxyglutarate,R-2HG)通过抑制FTO/m6A/Myc/CEBPA信号发挥抗白血病的作用。2011年,何川教授实验室证实肥胖相关蛋白(obesity-associated protein,FTO)是m6A去甲基转移酶。m6A是一种广泛存在的RNA修饰,参与RNA的剪接、转位、衰减、翻译等过程,参与维持机体稳态,并与疾病的发生发展密切相关,如肿瘤、炎症相关疾病等。FTO调节肿瘤的具体机制需要进一步被揭示。朱哈 刘娟 Su R Dong L Li C 2018中国肿瘤生物治疗杂志2018,25,2:62
4MicroRNA-34a inhibits glioblastoma growth by targeting multiple oncogenes显示文摘Li Y Guessous F Zhang Y Dipierro C Kefas B Johnson E Marcinkiewicz L Jiang J Yang Y Schmittgen TD Lopes B Schiff D Purow B Abounader R 2009中国神经肿瘤杂志2009,7,4:56
5SHRIMP U-Pb dating for a K-bentonite bed in the Tieling Formation,North China显示文摘A SHRIMP U-Pb zircon age of 1437±21 Ma was obtained for a recently discovered K-bentonite bed in the Tieling Formation,situated northeast of Beijing at the boundary between Liaoning and Hebei provinces,on the northern margin of the North China Craton(NCC).The SHRIMP U-Pb age places Tieling Formation near the end of the Calymmian Period of the early Mesoproterozoic Era.In addition,a SHRIMP U-Pb zircon date of 1372±18 Ma was acquired for K-bentonite beds in the overlying,dark-shale-dominated Xiamaling Formation from the same location northeast of Beijing.This date assigns a similar Mid-Mesoproterozoic(Ectasian Period) age for the Xiamaling Formation,as have previously determined dates from other sections northwest of Beijing.These dates indicate that the Tieling and Xiamaling formations,as well as the related succession in the eastern part of the Yanshan Mountains,represented by the well-known Meso-to Neoproterozoic standard section in Jixian,can be correlated well with sections northwest of Beijing in the western part of the Yanshan Mountains.In other words,the boundary between the Calymmian and Ectasian periods in the northern parts of the NCC is marked by the unconformity between the Tieling and Xiamaling formations in the northern NCC.This boundary was previously ascribed to the 'Qinyu Orogeny' and thought to be of Grenville age.In this regard,the conventional 'Qinyu Orogeny' should now be regarded as a short-lived regional uplift during Early Mesoproterozoic time,rather than a result from the Grenvillian assembly of the NCC to the Rodinia Supercontinent(~1.0 Ga).SU WenBo LI HuaiKun HUFF W D ETTENSOHN F R ZHANG ShiHong ZHOU HongYing WAN YuSheng 2010Chinese Science Bulletin2010,55,29:30
6高炉钛矿护炉的机理研究显示文摘从热力学和热模拟试验两方面研究了碳饱和铁浴内Ti(C ,N)的生成机理。利用CONFOCAL激光高温显微镜的试验数据重新确定了Ti在碳饱和铁浴内的溶解度和Ti(C ,N)形成所需的最低Ti含量。结果表明在碳饱和铁浴内生成碳化钛和氮化钛的最低Ti含量较采用现行热力学数据的计算值要低。采用长坩埚法研究了不同温度梯度条件下Ti(C ,N)的形成 ,发现Ti(C ,N)李永全 Yun Li R J Fruehan 2002宝钢技术2002,,1:25
7Intestinal antigen-presenting cells in mucosal immune homeostasis:Crosstalk between dendritic cells,macrophages and B-cells显示文摘The intestinal immune system maintains a delicate balance between immunogenicity against invading pathogens and tolerance of the commensal microbiota.Inflammatory bowel disease(IBD)involves a breakdown in tolerance towards the microbiota.Dendritic cells(DC),macrophages(MΦ)and B-cells are known as professional antigen-presenting cells(APC)due to their specialization in presenting processed antigen to T-cells,and in turn shaping types of T-cell responses generated.Intestinal DC are migratory cells,unique in their ability to generate primary T-cell responses in mesenteric lymph nodes or Peyer’s patches,whilst MΦand B-cells contribute to polarization and differentiation of secondary T-cell responses in the gut lamina propria.The antigen-sampling function of gut DC and MΦenables them to sample bacterial antigens from the gut lumen to determine types of T-cell responses generated.The primary function of intestinal B-cells involves their secretion of large amounts of immunoglobulin A,which in turn contributes to epithelial barrier function and limits immune responses towards to microbiota.Here,we review the role of all three types of APC in intestinal immunity,both in the steady state and in inflammation,and how these cells interact with one another,as well as with the intestinal microenvironment,to shape mucosal immune responses.We describe mechanisms of maintaining intestinal immune tolerance in the steady state but also inappropriate responses of APC to components of the gut microbiota that contribute to pathology in IBD.Elizabeth R Mann Xuhang Li 2014World Journal of Gastroenterology2014,20,29:19
8A Hybrid Forecasting Framework Based on Support Vector Regression with a Modified Genetic Algorithm and a Random Forest for Traffic Flow Prediction显示文摘The ability to perform short-term traffic flow forecasting is a crucial component of intelligent transportation systems. However, accurate and reliable traffic flow forecasting is still a significant issue due to the complexity and variability of real traffic systems. To improve the accuracy of short-term traffic flow forecasting, this paper presents a novel hybrid prediction framework based on Support Vector Regression(SVR) that uses a Random Forest(RF) to select the most informative feature subset and an enhanced Genetic Algorithm(GA) with chaotic characteristics to identify the optimal forecasting model parameters. The framework is evaluated with real-world traffic data collected from eight sensors located near the I-605 interstate highway in California. Results show that the proposed RFCGASVR model achieves better performance than other methods.Lizong Zhang Nawaf R Alharbe Guangchun Luo Zhiyuan Yao Ying Li 2018Tsinghua Science and Technology2018,23,4:19
95-Hydroxymethylcytosine signatures in cell-free DNA provide information about tumor types and stages显示文摘5-Hydroxymethylcytosine (5hmC ) 是被连接了到基因规定和癌症致病的重要哺乳动物的 DNA epigenetic 修正。这里,我们用定序途径的一枝敏感化学基于标签的低输入的猎枪在传播没有房间的 DNA (cfDNA ) 探索了 5hmC 的诊断潜力。我们从七种不同癌症类型的 49 个病人定序没有房间的 5hmC 并且发现了能被用来与高精确性预言癌症类型和阶段的不同特征。明确地,我们发现肺癌症在 cfDNA 导致 5hmC 的进步全球损失,而 hepatocellular 癌和胰腺的癌症在没有房间的 hydroxymethylome 导致疾病特定的变化。我们的 proof-of-principle 结果建议没有房间的 5hmC 签名可以潜在地被使用不仅识别癌症类型而且在一些癌症追踪肿瘤舞台。Chun-Xiao Song Senlin Yin Li Ma Amanda Wheeler Yu Chen Yan Zhang Bin Liu Junjie Xiong Weihan Zhang Jiankun Hu Zongguang Zhou Biao Dong Zhiqi Tian Stefanie S Jeffrey Mei-Sze Chua Samuel So Weimin Li Yuquan Wei Jiajie Diao Dan Xie Stephen R Quake 2017Cell Research2017,27,10:17
10Ultrasonographic Characteristics of Cortical Sulcus Development in the Human Fetus between 18 and 41 Weeks of Gestation显示文摘Sheng-Li Li Guo-Yang LUO Errol R Norwitz Shu-Yuan Ouyang Hua-Xuan Wen Ying Yuan Xiao-Xian Tian Jia-Min He Xi Chen 2017Chinese Medical Journal2017,,8:15
11The wonders of BMP9:From mesenchymal stem cell differentiation,angiogenesis,neurogenesis,tumorigenesis,and metabolism to regenerative medicine显示文摘Although bone morphogenetic proteins(BMPs)initially showed effective induction of ectopic bone growth in muscle,it has since been determined that these proteins,as members of the TGF-b superfamily,play a diverse and critical array of biological roles.These roles include regulating skeletal and bone formation,angiogenesis,and development and homeostasis of multiple organ systems.Disruptions of the members of the TGF-b/BMP superfamily result in severe skeletal and extra-skeletal irregularities,suggesting high therapeutic potential from understanding this family of BMP proteins.Although it was once one of the least characterized BMPs,BMP9 has revealed itself to have the highest osteogenic potential across numerous experiments both in vitro and in vivo,with recent studies suggesting that the exceptional potency of BMP9 may result from unique signaling pathways that differentiate it from other BMPs.The effectiveness of BMP9 in inducing bone formation was recently revealed in promising experiments that demonstrated efficacy in the repair of critical sized cranial defects as well as compatibility with bone-inducing bio-implants,revealing the great translational promise of BMP9.Furthermore,emerging evidence indicates that,besides its osteogenic activity,BMP9 exerts a broad range of biological functions,including stem cell differentiation,angiogenesis,neurogenesis,tumorigenesis,and metabolism.This review aims to summarize our current understanding of BMP9 across biology and the body.Sami Mostafa Mikhail Pakvasa Elam Coalson Allen Zhu Alex Alverdy Hector Castillo Jiaming Fan Alex Li Yixiao Feng Di Wu Elliott Bishop Scott Du Mia Spezia Alissa Li Ofir Hagag Alison Deng Winny Liu Mingyang Li Sherwin S·Ho Aravind Athiviraham Michael J·Lee Jennifer Moriatis Wolf Guillermo A·Ameer Hue H·Luu Rex C·Haydon Jason Strelzow Kelly Hynes Tong-Chuan He Russell R·Reid 2019Genes & Diseases2019,6,3:15
12Severe irinotecan-induced toxicity in a patient with UGT1A1*28 and UGT1A1*6 polymorphisms显示文摘Many studies have demonstrated the impact of UGT1A1 on toxicity of irinotecan. In particular, patients bear-ing UGT1A1*28 (TA 7/7) have a higher risk of severe neutropenia and diarrhea. Based on this, prescribers of irinotecan are advised that patients with UGT1A1*28 (TA 7/7) should start with a reduced dose of irinotecan, although a particular dose is not specified. Research in Asian countries has shown a lower incidence of UG-T1A1*28 (TA 7/7), while UGT1A1*6 (A/A) is more often found and is associated with severe irinotecan-related neutropenia. We report here a case of a metastatic colorectal cancer patient who is heterozygous for the UGT1A1*28 polymorphism (TA 6/7) as well as the UG-T1A1*6 polymorphism (G/A). The patient was treated with FOLFIRI for 9 cycles and underwent two irinote-can dose reductions according to pharmacokinetic data regarding exposure to the active metabolite, SN-38. Simultaneous heterozygous UGT1A1*28 and UGT1A1*6 polymorphisms may produce higher exposure to SN-38 and a higher risk of adverse effects related to irinote-can. Additional studies will be necessary to determine the optimal starting dose of irinotecan for patients with both UGT1A1*28 and UGT1A1*6 polymorphisms.Jian-Ming Xu Yan Wang Fei-Jiao Ge Li Lin Ze-Yuan Liu Manish R Sharma 2013World Journal of Gastroenterology2013,19,24:14
13Cyclooxygenase-2 and epithelial growth factor receptor up-regulation during progression of Barrett's esophagus to adenocarcinoma显示文摘瞄准:在整个 Barretts 食管的前进调查 cyclooxygenase-2 (COX-2 ) 和上皮的生长因素受体(EGFR ) 的表示() 。方法:COX-2 和 EGFR 蛋白质表情被使用免疫检测组织化学的方法。详细 cytomorphological 改变的 A 是坚定的。COX-2 和 EGFR 表示的区域被使用计算机成像系统确定。结果:COX-2 和 EGFR 的表情与前进一起增加了从到食管腺癌(EAC ) 。积极关联在 COX-2 表示和 EGFR 表示之间被发现。结论:COX-2 和 EGFR 可能在逐步的前进从是合作的到 EAC,从而导致致癌作用。Yan Li John M Wo Mukunda B Ray Whitney Jones Ruifeng R Su Susan Ellis Robert C G Martin 2006World Journal of Gastroenterology2006,12,6:14
14Direct reprogramming of human fibroblasts into dopaminergic neuron-like cells显示文摘外长的 dopaminergic 神经原(DA 神经原) 的移植是为治疗 Parkinson 的疾病(PD ) 的一条有希望的途径。然而,主要跌倒块是施主 DA 神经原的可靠来源的缺乏。这里,我们证明五 transcriptional 因素 Mash1, Ngn2, Sox2, Nurr1,和 Pitx3 的联合直接并且有效地装改编人成纤维细胞进 DA 像神经原的房间。为为 DA 神经原的各种各样的标记积极的染色的 reprogrammed 房间。他们也显示出典型 DA 举起和生产性质。而且,他们展出了 DA 神经原特定的 electrophysiological 侧面。最后,他们在一个老鼠 PD 模型提供了征兆的地势。因此,我们的直接 reprogrammed DA 像神经原的房间是为 PD 的房间代替治疗的有希望的来源。Xinjian Liu Fang Li Elizabeth A Stubblefield Barbara Blanchard Toni L Richards Gaynor A Larson Yujun He Qian Huang Aik-Choon Tan Dabing Zhang Timothy A Benke John R Sladek Nancy R Zahniser Chuan-Yuan Li 2012Cell Research2012,22,2:14
15中国社区健康素养与高血压治疗之间的关系:回顾性队列研究显示文摘健康素养较低与临床预后差相关。健康素养与血压之间的关系研究结果不一致。该研究调查了健康素养的决定因素和健康素养与高血压管理之间的潜在关系。方法:对360例高血压患者进行回顾性队列研究。基于标准方案进行测量、体检和实验室检查。刘莉 叶鹏 Shi D Li J Wang Y Wang S Liu K Shi R Zhang Q Chen X 2017中华高血压杂志2017,25,5:14
16A novel-designed Escherichia coli for the production of various polyhydroxyalkanoates from inexpensive substrate mixture显示文摘Li, R Chen, Q Wang, PG Qi, QS 2007中国生物学文摘2007,21,10:13
17Mapping of Fertility Restoring Gene for Aegilops kotschyi Cytoplasmic Male Sterility in Wheat Using SSR Markers显示文摘LK783 was found to be a good fertility restorer for K-type male sterility of wheat. Microsatellite markers were employed to map the major restoring gene in LK783. Maintainer and restorer DNA pools were established using the extreme sterile and fertile plants among (KJ5418A//911289/LK783)F1 population,respectively. Seventy-nine sets of SSR primers were screened for polymorphism between the two pools, 6 of which were found polymorphic. Linkage analysis showed that Xgwm11, Xgwm18 , Xgwm264a and Xgwm273were linked to the restoring gene in LK783, while Xgwm11, Xgwm18 and Xgwm273 were co-segregated. The distance between the Rf gene in LK783 and the three co-segregated markers was 6.54±4.37 cM, the distance between Rf gene and Xgwm264a was 5.71±4.10 cM. The four SSR markers were located on chromosome 1BS by amplifying the DNA of nulli-tetrasomics and ditelosomics of CS with the 4 sets of primers, indicating that the major restoring gene in LK783 was located on 1BS, but the relative location of the gene was different from Rfv1, allelism of the two genes should be further investigated. The breeding for new fertility restorer lines of K-type cytoplasmic male sterility in wheat would be facilitated by using the four polymorphic markers.LIU Bao-shen, SUN Qi-xin, GAO Qing-rong, SUN Lan-zhen, XIE Chao-jie, LI Chuan-you, NI Zhong-fu and DOU Bing-de( Agronomy Department, Shandong Agricultural University, Taian 271018, P.R.China Department of Plant Genetics and Breeding, China Agricultural University, Beijing 100094 , P. R . China ) 2002Agricultural Sciences in China2002,1,8:13
18High expression levels of IKK alpha and IKK beta are necessary for the malignant properties of liver cancer显示文摘IKK-NF-kappa B signaling is regarded as an important factor in hepatocarcinogenesis and a potential target for liver cancer therapy.Therefore,in this study,we analyzed the expression of mRNAs encoding components and targets of NF-kappa B signaling including IKK alpha,IKK beta,RANK,RANKL,OPG,CyclinD3,mammary serine protease inhibitor(Maspin),CyclinD1,c-FLIP,Bcl-x1,Stat3,Cip1 and Cip2 by real-time PCR in 40 patients with liver cancer.After statistical analysis,7 indices including IKK alpha,IKK beta,RANK,Maspin,c-FLIP,Cip2 and cyclinD1 were found to show significant differences between tumor tissue and its corresponding adjacent tissue.When IKK alpha and IKK beta were downregulated in the hepatocellular carcinoma(HCC) cell lines of MHCC-97L and MHCC-97H in vitro,the numbers of BrdU positive cells were decreased in both IKK alpha and IKK beta knockdown cells.Levels of apoptosis were also investigated in IKK alpha and IKK beta knockdown cells.The growth of HCC was inhibited in the subcutaneous implantation model,and lung metastatogenesis was also significantly inhibited in the kidney capsule transplantation model.Downregulation of IKK alpha and IKK beta in HCC cultured in vitro revealed that increased Maspin,OPG and RANKL expression was associated with metastasis of HCC.These findings were associated with downregulation of Bcl-XL and c-FLIP,which may be the reason for increased apoptosis.The therapeutic effect of IKK alpha and IKK beta downregulation depends on extent of NF-kappa B inhibition and the malignant nature of the HCC.We anticipate that IKK-targeted gene therapy can be used in the treatment of HCC,a cancer that is notoriously resistant to radiation and chemotherapy.Jiang,RQ Xia,YX Li,J Deng,L Zhao,L Shi,J Wang,XH Sun,BC Nanjing Med Univ,Liver Transplantat Ctr,Affiliated Hosp 1,Nanjing,Jiangsu Prov,Peoples R China Nanjing Med Univ,Ctr Canc,Nanjing,Jiangsu Prov,Peoples R China 2010南京医科大学学报(自然科学版)2010,30,5:13
19Calcium signaling and T-type calcium channels in cancer cell cycling显示文摘Regulation of intracellular calcium is an important signaling mechanism for cell proliferation in both normal and cancerous cells. In normal epithelial cells, free calcium concentration is essential for cells to enter and accomplish the S phase and the M phase of the cell cycle. In contrast, cancerous cells can pass these phases of the cell cycle with much lower cytoplasmic free calcium concentrations, indicating an alternative mechanism has developed for fulfilling the intracellular calcium requirement for an increased rate of DNA synthesis and mitosis of fast replicating cancerous cells. The detailed mechanism underlying the altered calcium loading pathway remains unclear; however, there is a growing body of evidence that suggests the T-type Ca2+ channel is abnormally expressed in cancerous cells and that blockade of these channels may reduce cell proliferation in addition to inducing apoptosis. Recent studies also show that the expression of T-type Ca2+ channels in breast cancer cells is proliferation state dependent, i.e. the channels are expressed at higher levels during the fast-replication period, and once the cells are in a non-proliferation state, expression of this channel isminimal. Therefore, selectively blocking calcium entry into cancerous cells may be a valuable approach for preventing tumor growth. Since T-type Ca2+ channels are not expressed in epithelial cells, selective T-type Ca2+ channel blockers may be useful in the treatment of certain types of cancers.James T Taylor Xiang-Bin Zeng Jonathan E Pottle Kevin Lee Alun R Wang Stephenie G Yi lennifer A S Scruggs Suresh S Sikka Ming Li 2008World Journal of Gastroenterology2008,14,32:12
20Brown adipose tissue transplantation improves whole-body energy metabolism显示文摘Qingsheng Chi Dehua Wang Zhaoyun Zhang Chenzhong Li Yiming Li Yaoming Xue John R Speakma Wanzhu Jin Xiaomeng Liu Zongji Zhen Xiaoming Zhu Minghui Meng Lan Li Yanyan Shen 2013Cell Research2013,23,6:11
返回顶部 每页显示:
共1525页 首页 上一页 第1页 下一页 末页 /1525 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