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排序方式: 共有502条查询结果,搜索用时 31 毫秒
21.
Mette Assentoft Shreyas Kaptan Robert A. Fenton Susan Z. Hua Bert L. de Groot Nanna MacAulay 《Glia》2013,61(7):1101-1112
Aquaporin 4 (AQP4) is the predominant water channel in the mammalian brain and is mainly expressed in the perivascular glial endfeet at the brain‐blood interface. AQP4 has been described as an important entry and exit site for water during formation of brain edema and regulation of AQP4 is therefore of therapeutic interest. Phosphorylation of some aquaporins has been proposed to regulate their water permeability via gating of the channel itself. Protein kinase (PK)‐dependent phosphorylation of Ser111 has been reported to increase the water permeability of AQP4 expressed in an astrocytic cell line. This possibility was, however, questioned based on the crystal structure of the human AQP4. Our study aimed to resolve if Ser111 was indeed a site involved in phosphorylation‐mediated gating of AQP4. The water permeability of AQP4‐expressing Xenopus oocytes was not altered by a range of activators and inhibitors of PKG and PKA. Mutation of Ser111 to alanine or aspartate (to prevent or mimic phosphorylation) did not change the water permeability of AQP4. PKG activation had no effect on the water permeability of AQP4 in primary cultures of rat astrocytes. Molecular dynamics simulations of a phosphorylation of AQP4.Ser111 recorded no phosphorylation‐induced change in water permeability. A phospho‐specific antibody, exclusively recognizing AQP4 when phosphorylated on Ser111, failed to detect phosphorylation in cell lysate of rat brain stimulated by conditions proposed to induce phosphorylation of this residue. Thus, our data indicate a lack of phosphorylation of Ser111 and of phosphorylation‐dependent gating of AQP4. 相似文献
22.
Dworkin RH O'Connor AB Backonja M Farrar JT Finnerup NB Jensen TS Kalso EA Loeser JD Miaskowski C Nurmikko TJ Portenoy RK Rice AS Stacey BR Treede RD Turk DC Wallace MS 《Pain》2007,132(3):237-251
Patients with neuropathic pain (NP) are challenging to manage and evidence-based clinical recommendations for pharmacologic management are needed. Systematic literature reviews, randomized clinical trials, and existing guidelines were evaluated at a consensus meeting. Medications were considered for recommendation if their efficacy was supported by at least one methodologically-sound, randomized clinical trial (RCT) demonstrating superiority to placebo or a relevant comparison treatment. Recommendations were based on the amount and consistency of evidence, degree of efficacy, safety, and clinical experience of the authors. Available RCTs typically evaluated chronic NP of moderate to severe intensity. Recommended first-line treatments include certain antidepressants (i.e., tricyclic antidepressants and dual reuptake inhibitors of both serotonin and norepinephrine), calcium channel alpha2-delta ligands (i.e., gabapentin and pregabalin), and topical lidocaine. Opioid analgesics and tramadol are recommended as generally second-line treatments that can be considered for first-line use in select clinical circumstances. Other medications that would generally be used as third-line treatments but that could also be used as second-line treatments in some circumstances include certain antiepileptic and antidepressant medications, mexiletine, N-methyl-D-aspartate receptor antagonists, and topical capsaicin. Medication selection should be individualized, considering side effects, potential beneficial or deleterious effects on comorbidities, and whether prompt onset of pain relief is necessary. To date, no medications have demonstrated efficacy in lumbosacral radiculopathy, which is probably the most common type of NP. Long-term studies, head-to-head comparisons between medications, studies involving combinations of medications, and RCTs examining treatment of central NP are lacking and should be a priority for future research. 相似文献
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Trond Engjom Ingrid Kvåle Nordaas Erling Tjora Georg Dimcevski Ingfrid Salvesen Haldorsen Søren Schou Olesen Asbjørn Mohr Drewes Kristina Zviniene Giedrus Barauskas Hans Søe Riis Jespersen Nanna Jensen Anders Borch Camilla Nøjgaard Srdan Novovic Svetlana S. Kardasheva Alexey Okhlobystin Truls Hauge Anne Waage Jens Brøndum Frøkjær 《Pancreatology》2021,21(4):688-697
ObjectivesThe relation between aetiology and structural changes of the pancreas in patients with chronic pancreatitis (CP) is not fully understood. Earlier studies are limited by focusing on selected factors in studies of limited sample size. We aimed to use a large dataset to explore associations between aetiology and pancreatic morphology in CP.MethodsSubjects with definite or probable CP according to the M-ANNHEIM diagnostic criteria were included in this multicentre cross-sectional observational study and assessed using a standardized and validated CP imaging system. We performed multivariate logistic regression to analyse if aetiological factors adjusted for covariates were independently associated with morphological pancreatic features.ResultsWe included 959 patients (66% males). Mean (SD) age was 55 (14) years. Pancreatic structural changes were found in 94% of the subjects: 67% had calcifications, 59% main pancreatic duct dilatation, 33% pseudo-cysts and 22% pancreatic atrophy. Alcohol abuse was independently associated with pancreatic calcifications (odds ratio (OR, [95% CI]); 1.61, [1.09, 2.37]) and focal acute pancreatitis (OR; 2.13, [1.27, 3.56]), whereas smoking was independently associated with more severe calcifications (OR; 2.09, [1.34, 3.27]) and involvement of the whole gland (OR; 2.29, [1.61, 3.28]). Disease duration was positively associated with calcifications (OR; (per year) 1.05 [1.02, 1.08]) and pancreatic atrophy (OR; 1.05 [1.02, 1.08]) and negatively associated with focal acute pancreatitis (OR 0.91, [0.87, 0.95] and pseudo cysts (OR; 0.96, [0.93, 0.98]).ConclusionIn this large-scale study, etiological risk factors and disease duration in CP were independently associated with specific structural pancreatic imaging changes. 相似文献
25.
Vittorio Fortino Lukas Wisgrill Paulina Werner Sari Suomela Nina Linder Erja Jalonen Alina Suomalainen Veer Marwah Mia Kero Maria Pesonen Johan Lundin Antti Lauerma Kristiina Aalto-Korte Dario Greco Harri Alenius Nanna Fyhrquist 《Proceedings of the National Academy of Sciences of the United States of America》2020,117(52):33474
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27.
目的探讨Th1/Th2亚群失衡在大鼠深静脉血栓形成(DVT)中的作用及中药复方消栓通脉颗粒逆转Th1/Th2亚群失衡治疗DVT的作用机制。方法80只DVT大鼠随机分为消栓通脉颗粒组、DVT组、假手术组、正常组,分离大鼠脾脏单个核细胞,流式细胞术检测各组大鼠Thl亚群(CD4+TNF—α)、Th2亚群(CD4+IL-4+)比例,ELISA法检测大鼠外周血TNF—α、IL-4水平。结果与正常组及假手术组比较,DVT大鼠脾脏Th1亚群比例显著升高(P=0.022),Th2亚群比例显著降低(P=0.015);血清TNF-α水平显著升高(P=0.005);IL-4水平显著降低(P=0.012)。消栓通脉颗粒作用后,大鼠脾脏Thl亚群比例显著降低(P=0.008),Th2亚群比例显著升高(P=0.011),血清TNF-α水平降低(P=0.036),IL-4水平升高(P=0.018)。结论Th1/Th2亚群失衡参与了大鼠DVT发病过程,消栓通脉颗粒诱导T细胞向Th2亚群偏移,抑制炎性因子表达进而减轻炎症反应,保护血管内皮细胞,促进血栓再通。 相似文献
28.
Samantha J. Bryen Lisa J. Ewans Jason Pinner Suzanna C. MacLennan Sandra Donkervoort Diana Castro Ana Tpf Gina O'Grady Beryl Cummings Katherine R. Chao Ben Weisburd Laurent Francioli Fathimath Faiz Adam M. Bournazos Ying Hu Carla Grosmann Denise M. Malicki Helen Doyle Nanna Witting John Vissing Kristl G. Claeys Kathryn Urankar Ana Beleza‐Meireles Julia Baptista Sian Ellard Marco Savarese Mridul Johari Anna Vihola Bjarne Udd Anirban Majumdar Volker Straub Carsten G. Bnnemann Daniel G. MacArthur Mark R. Davis Sandra T. Cooper 《Human mutation》2020,41(2):403-411
29.
Internal transcardiac pericardiocentesis for acute tamponade 总被引:2,自引:0,他引:2
Fisher JD Kim SG Ferrick KJ Gross JN Goldberger MH Nanna M 《The American journal of cardiology》2000,86(12):1222-1389
If the catheter is still in the pericardium when tamponade is recognized during catheterization or electrophysiologic procedures, it can be used for definitive aspiration and relief of tamponade. This is physiologically beneficial to the patient, and psychologically beneficial to both patient and medical staff. 相似文献
30.
Roos N Leth T Jakobsen J Thilsted SH 《International journal of food sciences and nutrition》2002,53(5):425-437
Recognising the importance of fish in the Bangladeshi diet, the objective of the present study was to screen commonly consumed fish species for vitamin A content to evaluate the potential of fish as a vitamin A source in food-based strategies to combat vitamin A deficiency. Samples of 26 commonly consumed fish species and one crustacean were collected in Kishoreganj and Mymensingh, Bangladesh. To obtain edible parts, the fish were cleaned by Bangladeshi women according to traditional practices. Distribution of vitamin A in parts of the fish and the effect of the cleaning practices on the vitamin A content in#10; edible parts were assessed. The content of vitamin A compounds was analysed by high-performance liquid chromatography. The vitamin A content in small fish ranged from 2680 retinol equivalents (RE)/100 g raw edible parts in mola (Amblypharyngodon mola) to 20 RE/100 g raw edible parts in chata (Colisa lalia; an alternative scientific name is Colisa lalius). The vitamin A content in cultured species, silver carp (Hypophthalmichthys molitrix), rui (Labeo rohita), mrigal (Cirrhinus mrigala) and tilapia (Oreochromis niloticus) was low, <30 RE/100 g raw edible parts. In mola, 90% of the vitamin A was found in the eyes and viscera. The vitamin A content in the screened fish species was highly variable, by more than a factor of 100. The existence of commonly consumed fish in Bangladesh belonging to the categories of very high and high vitamin A content offers a great unexploited potential for food-based strategies to improve the vitamin A intake by promoting the production and consumption of these species. 相似文献