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141.
Cabuk D Basaran G Celikel C Dane F Yumuk PF Iyikesici MS Ekenel M Turhal NS 《Oncology》2007,72(1-2):111-117
142.
A detailed analysis of ‘not relevant’ responses on the DLQI in psoriasis: potential biases in treatment decisions 下载免费PDF全文
143.
Inflammation in the liver is an extraintestinal manifestation that is frequently seen during inflammatory bowel diseases (IBD). The authors investigated histopathologycal, ultrastructural and antioxidant effects of dexmedetomidine (Dex) on liver during trinitrobenzene sulfonic acid (TNBS)-induced inflammatory bowel disease. Thirty-two BALB/c mice were divided (n?=?8) as follows: control; Dex (dexmedetomidine) (30?μg/kg) for 6 days; TNBS 150?μL, TNBS?+?ethanol (50% w/v) intrarectally; TNBS?+?Dex. The histopathological and ultrastructural changes were evaluated. The levels of malondialdehyde (MDA), activity of antioxidant enzymes (GPx and SOD) were measured in liver tissue. Induction of colitis induced histopathological and ultrastructural changes of damage in liver. Those changes were markedly reduced in the TNBS?+?Dex group and that reduction was even significant in comparison to the TNBS group. MDA levels were significantly higher in the TNBS group and dexmedetomidine significantly elevated SOD levels in the TNBS?+?Dex group. These results suggest that the administration of dexmedetomidine reduces the histopathological and ultrastructural damage and increases the defense capacity against oxidative damage on liver in this IBD mice model. 相似文献
144.
Harvey J. Armbrecht Akbar M. Siddiqui Michael Green Susan A. Farr Vijaya B. Kumar William A. Banks Ping Patrick Gul N. Shah John E. Morley 《Neurobiology of aging》2014
The senescence-accelerated mouse (SAMP8) strain exhibits decreased learning and memory and increased amyloid beta (Aβ) peptide accumulation at 12 months. To detect differences in gene expression in SAMP8 mice, we used a control mouse that was a 50% cross between SAMP8 and CD-1 mice and which showed no memory deficits (50% SAMs). We then compared gene expression in the hippocampus of 4- and 12-month-old SAMP8 and control mice using Affymetrix gene arrays. At 12 months, but not at 4 months, pathway analysis revealed significant differences in the long term potentiation (6 genes), phosphatidylinositol signaling (6 genes), and endocytosis (10 genes) pathways. The changes in long term potentiation included mitogen-activated protein kinase (MAPK) signaling (N-ras, cAMP responsive element binding protein [CREB], protein phosphatase inhibitor 1) and Ca-dependent signaling (inositol triphosphate [ITP] receptors 1 and 2 and phospholipase C). Changes in phosphatidylinositol signaling genes suggested altered signaling through phosphatidylinositol-3-kinase, and Western blotting revealed phosphorylation changes in serine/threonine protein kinase AKT and 70S6K. Changes in the endocytosis pathway involved genes related to clathrin-mediated endocytosis (dynamin and clathrin). Endocytosis is required for receptor recycling, is involved in Aβ metabolism, and is regulated by phosphatidylinositol signaling. In summary, these studies demonstrate altered gene expression in 3 SAMP8 hippocampal pathways associated with memory formation and consolidation. These pathways might provide new therapeutic targets in addition to targeting Aβ metabolism itself. 相似文献
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Twelve polymorphic microsatellite loci were isolated and characterized for one subspecies of the Xantus’s murrelet (Synthliboramphus hypoleucus scrippsi), a threatened seabird. Using blood samples obtained from 40 birds captured at Santa Barbara Island, California, in April–May 1996, 3–14 alleles per locus were detected, and expected heterozygosity ranged from 0.25 to 0.90. Genotype frequencies showed no departures from Hardy–Weinberg expectations. Linkage is suspected in one pair of loci. 相似文献
148.
Burcin Ustbas Gul Deniz Kilic Yanilmaz Dilan Arslan Mehmet Bayramicli Ozge Akbulut 《Journal of plastic, reconstructive & aesthetic surgery》2019,72(3):477-483
Background
There is a need for a peripheral nerve model on which surgeons-in-training can simulate the repair of nerve injuries at their own pace. Although practicing on animal models/cadavers is considered the “gold standard” of microsurgical training, the proposed model aims to provide a platform for improving the technical skills of surgical trainees prior to their practice on cadaver/animal models. In addition, this model has the potential to serve as a standardized test medium for assessing the skill sets of surgeons.Methods
Several formulations of silicone were utilized for the design and fabrication of a model which realizes the hierarchical structure of peripheral nerves. The mechanical properties were characterized via the Universal Testing Machine; the damage caused by the needle on the entry sites was assessed through scanning electron microscopy (SEM).Results
Mechanical properties of the formulations of silicone were tested to mimic human peripheral nerves. A formulation with 83.3?wt% silicone oil and 0.1?wt% cotton fiber was chosen to be used as nerve fascicles. Both 83.3?wt% silicone oil with cotton fiber and 66.6?wt% silicone oil without fiber provided a microsuturing response similar to that of epineurium at a wall thickness of 1?mm. SEM also confirmed that the entry of the needle did not introduce significant holes at the microsuturing sites.Conclusions
The proposed peripheral nerve model mimicked human tissues mechanically and cosmetically, and a simulation of the repair of a fifth-degree nerve injury was achieved. 相似文献149.
将药物及高分子材料溶于乙醇后边搅拌边加入非溶剂制成布洛芬-聚丙烯酸树脂Ⅱ共沉淀物。通过A、B两种方法并以不同的药物-聚丙烯酸树脂Ⅱ比例制成了共沉淀物,再以这些共沉淀物直接压片制成骨架片。通过差热分析(DSC)、扫描电镜(DSC)及红外光谱(IR)研究了共沉淀物的性质。研究主要集中在处方中高分子材料所占的比例,溶出介质的pH及制备共沉淀物的方法对布洛芬从骨架中释放的影响。体外溶出实验分别在不同的pH条件下进行。处方研究表明随着聚丙烯酸树脂Ⅱ用量的增加,药物的释放过程显著延长。另外,增加溶出介质的pH会显著增加药物的累积释放百分数。此外实验还表明以方法B制成的共沉淀物的骨架片中药物的累积释放百分数要高于A法制成的骨架片,然而方法A中制得的骨架片中药物的释放却更接近于线性释放。 相似文献
150.