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排序方式: 共有1312条查询结果,搜索用时 171 毫秒
41.
Embade N Fernández-Ramos D Varela-Rey M Beraza N Sini M Gutiérrez de Juan V Woodhoo A Martínez-López N Rodríguez-Iruretagoyena B Bustamante FJ de la Hoz AB Carracedo A Xirodimas DP Rodríguez MS Lu SC Mato JM Martínez-Chantar ML 《Hepatology (Baltimore, Md.)》2012,55(4):1237-1248
Hu antigen R (HuR) is a central RNA-binding protein regulating cell dedifferentiation, proliferation, and survival, which are well-established hallmarks of cancer. HuR is frequently overexpressed in tumors correlating with tumor malignancy, which is in line with a role for HuR in tumorigenesis. However, the precise mechanism leading to changes in HuR expression remains unclear. In the liver, HuR plays a crucial role in hepatocyte proliferation, differentiation, and transformation. Here, we unraveled a novel mean of regulation of HuR expression in hepatocellular carcinoma (HCC) and colon cancer. HuR levels correlate with the abundance of the oncogene, murine double minute 2 (Mdm2), in human HCC and colon cancer metastases. HuR is stabilized by Mdm2-mediated NEDDylation in at least three lysine residues, ensuring its nuclear localization and protection from degradation. Conclusion: This novel Mdm2/NEDD8/HuR regulatory framework is essential for the malignant transformation of tumor cells, which, in turn, unveils a novel signaling paradigm that is pharmacologically amenable for cancer therapy. 相似文献
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Ashwin S Kamath Michael G Sarr David M Nagorney Florencia G Que Michael B Farnell Michael L Kendrick Kaye M Reid Lombardo John H Donohue 《HPB : the official journal of the International Hepato Pancreato Biliary Association》2012,14(11):772-776
Background
Primary gastrointestinal stromal tumours (GISTs) of the duodenum are rare. The aim of this study was to review the surgical management of GISTs in this anatomically complex region.Methods
Retrospective review from January 1999 to August 2011 of patients with primary GISTs of the duodenum.Results
Forty-one patients underwent resection of duodenal GISTs. All operations were performed with intent to cure with negative margins of resection. The most common location of origin was the second portion of the duodenum. Local excision (n = 19), segmental resection with primary anastomosis (n = 11) and a pancreatoduodenectomy (n = 11) were performed. Two patients underwent an ampullectomy with local excision. Peri-operative mortality and overall morbidity were 0 and 12, respectively. Patients with high-risk GISTs (P = 0.008) and those who underwent a pancreatoduodenectomy (P = 0.021) were at a greater risk for morbidity. The median follow-up was 18 months. Eight patients developed recurrence. High-risk GISTs and neoplasms with ulceration had the greatest risk for recurrence (P = 0.017, P = 0.029 respectively). The actuarial 3- and 5-year survivals were 85% and 74%, respectively.Conclusion
The choice and type of resection depends on the proximity to the ampulla of Vater, involvement of adjacent organs and the ability to obtain negative margins. The morbidity depends on the type of procedure for GIST. 相似文献43.
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Concetta Crisafulli Alberto Chiesa Changsu Han Soo-Jung Lee Beatrice Balzarro Costanza Andrisano Antonina Sidoti Ashwin A. Patkar Chi-Un Pae Alessandro Serretti 《Psychiatry research》2013
In this study we investigated 36 single nucleotide polymorphisms within 10 genes previously associated with major depression and bipolar disorder, as well as with the response to their treatment (ABCB1, ABCB4, TAP2, CLOCK, CPLX1, CPLX2, SYN2, NRG1, 5HTR1A and GPRIN2). No association with mood disorders and clinical outcomes was observed. 相似文献
46.
Ben A. Strickland Joohi Jimenez-Shahed Joseph Jankovic Ashwin Viswanathan 《Journal of clinical neuroscience》2013,20(12):1709-1712
Deep brain stimulation (DBS) electrodes have been used effectively to perform radiofrequency lesions in the brain. This study aimed to characterize lesion geometry and peak tissue temperature achieved when lesioning through DBS electrodes. Fresh bovine liver was chosen for a medium as the tissue reliably changes color between 45 and 50°C. Medtronic 3387 DBS electrodes (Medtronic Sofamor Danek, Inc., Memphis, TN, USA) and the Cosman G4 Radiofrequency Generator (Cosman Medical, Inc., Burlington, MA, USA) were used for lesioning. Bipolar lesions were created at currents between 25 mA and 100 mA for 60–120 seconds. Peak tissue temperature was monitored with Cosman disposable cordotomy electrode (LCED; Cosman Medical Inc.) and recorded. Photographic analysis of the lesions was performed. Tissue impedance ranged between 800–900 Ohms, and tissue temperature was maintained at 20°C. With lesions at 25 mA for up to 120 seconds, maximal tissue temperature achieved was 36°C. This correlated with no visible lesions. At 50 mA, maximal tissue temperature exceeded 100°C, which was associated with tissue charring. Lesions created at 35 mA and 40 mA led to an increase in tissue temperature of 63°C and 75°C, respectively. Lesion size was highly reproducible, increasing from 4.5 mm × 7 mm at 35 mA, to 6 mm × 7.5 mm at 50 mA. Preliminary analysis suggests that caution should be exerted in using lesion amplitudes exceeding 40 mA (at 800 Ohms), as peak tissue temperatures in vivo could exceed 100°C. Further in vivo experiments with imaging correlates are needed to further test the safety of this technique. 相似文献
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Sun James J. Perera Bhathika Henley William Angus-Leppan Heather Sawhney Indermeet Watkins Lance Purandare Kiran N. Eyeoyibo Mogbeyiteren Scheepers Mark Lines Geraldine Winterhalder Robert Ashby Samantha De Silva Ravindu Miller Jonjo Philpott David E. Ashwin Chris Howkins Joshua Slater Harriet Medhurst David Shankar Rohit 《Journal of neurology》2022,269(5):2761-2761
Journal of Neurology - 相似文献
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