首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   58篇
  免费   7篇
  国内免费   1篇
儿科学   4篇
妇产科学   1篇
基础医学   8篇
口腔科学   2篇
临床医学   2篇
内科学   3篇
皮肤病学   4篇
神经病学   16篇
外科学   4篇
综合类   7篇
预防医学   5篇
药学   8篇
中国医学   2篇
  2023年   1篇
  2022年   2篇
  2020年   2篇
  2019年   4篇
  2018年   6篇
  2017年   2篇
  2015年   2篇
  2014年   6篇
  2013年   7篇
  2012年   2篇
  2011年   7篇
  2010年   4篇
  2009年   3篇
  2008年   2篇
  2007年   2篇
  2006年   2篇
  2005年   3篇
  2004年   1篇
  2003年   1篇
  2001年   1篇
  1999年   1篇
  1993年   1篇
  1992年   2篇
  1985年   1篇
  1983年   1篇
排序方式: 共有66条查询结果,搜索用时 15 毫秒
1.
Advances in molecular and structural and functional neuroimaging are rapidly expanding the complexity of neurobiological understanding of Parkinson's disease (PD). This review article begins with an introduction to PD neurobiology as a foundation for interpreting neuroimaging findings that may further lead to more integrated and comprehensive understanding of PD. Diverse areas of PD neuroimaging are then reviewed and summarized, including positron emission tomography, single photon emission computed tomography, magnetic resonance spectroscopy and imaging, transcranial sonography, magnetoencephalography, and multimodal imaging, with focus on human studies published over the last five years. These included studies on differential diagnosis, co-morbidity, genetic and prodromal PD, and treatments from l-DOPA to brain stimulation approaches, transplantation and gene therapies. Overall, neuroimaging has shown that PD is a neurodegenerative disorder involving many neurotransmitters, brain regions, structural and functional connections, and neurocognitive systems. A broad neurobiological understanding of PD will be essential for translational efforts to develop better treatments and preventive strategies. Many questions remain and we conclude with some suggestions for future directions of neuroimaging of PD.  相似文献   
2.
目的观察长链非编码RNA(lncRNA)AK092375在膀胱癌细胞中的表达及其通过葡萄糖转运蛋白3(GLUT3)的表达对NF-κB/TCS2/mTOR信号通路相关因子的影响。方法2020年1月—2021年5月于内蒙古医科大学附属医院临床医学研究中心进行相关实验。选择AK092375表达量最低的膀胱癌细胞系T24作为研究对象,并与人正常膀胱上皮细胞SV-H、UC-1进行比较。取培养生长良好的T24细胞随机分为A组(AK092375和GLUT3同时过表达)、B组(AK092375和GLUT3同时干扰)、C组(AK092375过表达而GLUT3干扰)、D组(AK092375干扰而GLUT3过表达)4组。通过RT-PCR和Western-blot法检测各组细胞GLUT3及下游NF-κB/TCS2/mTOR信号通路(NF-κB、TCS2、mTOR)mRNA和蛋白表达水平;并分析各组膀胱癌细胞的增殖和迁移情况。结果Western-blot检测结果显示,AK092375和GLUT3蛋白在人膀胱癌细胞系T24的表达量明显高于人正常膀胱上皮细胞SV-HUC-1(t/P=3.215/<0.001、2.538/<0.001)。GLUT3、NF-κB、TCS2、mTOR mRNA和蛋白表达水平比较,A组>D组>C组>B组,且各组间比较差异有统计学意义(mRNA:F/P=25.940/<0.001、28.444/<0.001、23.919/<0.001、16.853/<0.001;蛋白:F/P=7.070/<0.001、7.497/<0.001、33.717/<0.001、12.519/<0.001)。膀胱癌细胞的迁移率和增殖情况比较,A组>D组>C组>B组,各组间比较差异均有统计学意义(F/P=9.704/<0.001,3.265/<0.001)。结论AK092375可能通过上调GLUT3的表达,从而激活下游NFκB/TCS2/mTOR信号通路,进而促进膀胱癌细胞的增殖和转移。  相似文献   
3.
双组份信号转导系统(Two—componentsignaltransductionsystem,TCS)广泛存在于原核生物细胞内,对细胞生长、分化、代谢、毒力、持留性、致病性等方面的调控发挥着重要作用。PhoPRTCS作为双组份系统中最基本、最重要的感应外界环境变化,并作出相应反应的调控系统,能够调控结核分枝杆菌(MycobacteriumTuberculosis,MTB)更好的适应宿主微环境变化。因此PhoPRTCS作为MTB适应环境变化的重要调控系统已愈来愈受关注,关于PhoPRTCS在MTB的致病机制调控方面的研究正在成为新的热点。  相似文献   
4.
Objective To investigate the diagnosis and treatment of gestational trophoblastic disease (GTD). Methods A retrospective review was conducted on 56 patients with GTD who under- went treatment in Ruijin hospital from January 2007 to December 2012. Their infor- mation of diagnosis, treatments, follow-up and efficacy were collected and analyzed Results Misdiagnosis rate was 41.1% (23/56)for the first time. Of 56 patients, 31 had direct curettage, 19 had curettage after trichosanthis (TCS) treatment, 3 had curettage after intervention treatment and 3 did not have curettage. Twenty patients with gesta- tional trophoblastic neoplasia (GTN) took fluorouracil+vincristine+dactinomycin (VCR +KSM+5-FU) chemotherapy, but 2 of them changed to etoposide+methotrexate+acti- nomycetes streptozotocin-D+cyclophosphamide+vincristine (EMA-CO) chemo- therapy due to drug resistance. Three patients" with GTN took EMA-CO chemotherapy. Two patients with placental site trophoblastic tumor (PSTT) required surgeries, one took hysterectomy, another got mass and adnexectomy. Apart from 1 case who gave up treatment and was dead, all the other women went into remission from their diseases. Conclusion The diagnosis of trophoblastic disease rely on a comprehensive analysis. A reasonable choice of TCS or intervention can be effective and safe in treating GTD. Most patients with GTN could get complete remission by selecting the appropriate chemotherapy and surgery.  相似文献   
5.
Triclosan is a broad-spectrum antibacterial agent, which has been shown previously to alleviate human allergic skin disease. The purpose of this study was to investigate the hypothesis that the mechanism of this action of triclosan is, in part, due to effects on mast cell function. Mast cells play important roles in allergy, asthma, parasite defense, and carcinogenesis. In response to various stimuli, mast cells degranulate, releasing allergic mediators such as histamine. In order to investigate the potential anti-inflammatory effect of triclosan on mast cells, we monitored the level of degranulation in a mast cell model, rat basophilic leukemia cells, clone 2H3. Having functional homology to human mast cells, as well as a very well defined signaling pathway leading to degranulation, this cell line has been widely used to gain insight into mast-cell driven allergic disorders in humans. Using a fluorescent microplate assay, we determined that triclosan strongly dampened the release of granules from activated rat mast cells starting at 2 μM treatment, with dose-responsive suppression through 30 μM. These concentrations were found to be non-cytotoxic. The inhibition was found to persist when early signaling events (such as IgE receptor aggregation and tyrosine phosphorylation) were bypassed by using calcium ionophore stimulation, indicating that the target for triclosan in this pathway is likely downstream of the calcium signaling event. Triclosan also strongly suppressed F-actin remodeling and cell membrane ruffling, a physiological process that accompanies degranulation. Our finding that triclosan inhibits mast cell function may explain the clinical data mentioned above and supports the use of triclosan or a mechanistically similar compound as a topical treatment for allergic skin disease, such as eczema.  相似文献   
6.
Alpha-synuclein aggregation is a neuropathological hallmark of many neurodegenerative diseases including Parkinson's disease (PD), Parkinson's disease with dementia (PDD) and dementia with Lewy bodies (DLB), collectively termed the α-synucleinopathies. Substantial advances in clinical criteria and neuroimaging technology over the last 20 years have allowed great strides in the detection and differential diagnosis of these disorders. Nevertheless, it is clear that whilst the array of different imaging modalities in clinical use allow for a robust diagnosis of α-synucleinopathy in comparison to healthy subjects, there is no clear diagnostic imaging marker that affords a reliable differential diagnosis between the different forms of Lewy body disease (LBD) or that could facilitate tracking of disease progression. This has led to a call for a biomarker based on the pathological hallmarks of these diseases, namely α-synuclein-positive Lewy bodies (LBs). This potentially may be advantageous in terms of early disease detection, but may also be leveraged into a potential marker of disease progression. We here aim to firstly review the current status of neuroimaging biomarkers in PD and related synucleinopathies. Secondly, we outline the rationale behind α-synuclein imaging as a potential novel biomarker as well as the potential benefits and limitations of this approach. Thirdly, we attempt to illustrate the likely technical hurdles to be overcome to permit successful in vivo imaging of α-synuclein pathology in the diseased brain. Our overriding aim is to provide a framework for discussion of how to address this major unmet clinical need.  相似文献   
7.

Objectives

To (1) systematically review the literature on behavioral interventions for people with multiple sclerosis (MS) that aim to change physical activity (PA) behavior; and (2) explore whether these interventions are clinically effective in improving PA, are theory based, and use established behavior change techniques (BCTs).

Data Sources

A systematic electronic search was conducted on databases EBSCO (including AMED, Biomedical Reference Collection: Expanded, CINHAL, MEDLINE, PsycArticles, PsycInfo), PubMed, EMBASE, and Web of Science from April 2017 to May 2017.

Study Selection

Studies were included if (1) the interventions aimed to change PA behavior among people with MS; (2) PA was recognized as a primary outcome measure; and (3) they had a randomized controlled trial (RCT) design.

Data Extraction

The resulting behavioral interventions were coded using the Theory Coding Scheme and the CALO-RE taxonomy to assess theory base and BCTs. A meta-analysis was conducted to assess effectiveness.

Data Synthesis

Fourteen RCTs were included. Combined, there was a significant (P=.0003; d=1.00; 95% confidence interval, .46–1.53) short-term change in self-report PA behavior for studies with nonactive control groups. There was no change in objective or long-term PA. Studies failed to discuss results in relation to theory and did not attempt to refine theory. Fifty percent of BCTs within the CALO-RE were used, with BCTs of “goal-setting” and “action-planning” being the most frequently used.

Conclusions

Current evidence supports the efficacy of PA intervention on subjective but not objective outcomes. However, conclusions from this review should be interpreted with caution because of the small number of studies included and small sample size. Further, while using theory in intervention design, interventions in this review have not reported the refining of theory. Exploration of the use of additional BCTs to change PA behavior is also required within future interventions.  相似文献   
8.
脊髓拴系综合征手术前后尿流动力学评价的临床意义   总被引:2,自引:0,他引:2  
目的:评价脊髓拴系系松解术后临床疗效与尿流动力学改变的关系,方法:20例脊髓拴系综合征患儿行拴系松解术,手术前及术后6个月行尿流动力学检查,结果:11例症状改善,术后膀胱顺应性,膀胱容量,充盈末尿道闭合压增加,逼尿肌压降低,残余尿减少,6例无改善,3例加重,结论:拴系松解术是治疗脊髓拴系综合征的有效方法,手术前后尿充动力学检查是指导治疗和评价疗效的客观指标。  相似文献   
9.
目的研究天花粉蛋白(trichosanthin,TCS)对宫颈癌Caski细胞DNMT1基因的表达和酶活性的影响,并探讨天花粉蛋白抗宫颈癌及去甲基化机制,寻找新型去甲基化药物。方法应用RT-PCR、实时荧光定量PCR和Western免疫印迹分析检测天花粉蛋白对宫颈癌Caski细胞DNMTI基因表达的影响;应用DNMT1酶活性试剂盒检测天花粉蛋白对DNMT1酶活性的影响。结果经天花粉蛋白处理后,Caski细胞中DNM1基因mRNA及蛋白表达水平降低,体外酶活性分析发现,TCS对DNMT1酶活性有直接抑制作用。结论天花粉蛋白去甲基化的作用可能是通过抑制DNMTs的活性而实现的;天花粉蛋白有可能是新型的DNMTs抑制剂,具有潜在的临床应用价值。  相似文献   
10.
本文目的是对经颅超声技术(TCS)在抑郁症及神经变性疾病伴抑郁中的应用进行综述,以期为抑郁症及神经变性疾病伴抑郁的临床诊断提供新的方向。TCS在抑郁症患者可表现中缝低回声,在神经变性疾病伴抑郁患者中也出现了特异性表现。本文对TCS在抑郁症及神经变性疾病伴抑郁中的应用进行探讨。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号