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71.
Jäger HR Waldman AD Benton C Fox N Rees J 《AJNR. American journal of neuroradiology》2005,26(2):274-278
We report the case of malignant oligodendroglioma in a 36-year-old man who underwent diffusion-weighted, perfusion-weighted, and volumetric MR imaging before and after PCV (procarbazine, CCNU, vincristine) chemotherapy. The tumor regions exhibiting a low apparent diffusion coefficient and increased relative cerebral blood volume showed a marked response to chemotherapy and dramatic decrease in volume, whereas the remaining tumor regions showed little change. Diffusion-weighted and perfusion-weighted MR imaging may be helpful in predicting chemosensitivity of glial tumors. 相似文献
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73.
Ronald?T?ActonEmail author Ellen?H?Barton William?W?Hollowell Amy?L?Dreibelbis Rodney?CP?Go James?C?Barton 《BMC cancer》2004,4(1):47
Background
We sought to evaluate the hypothesis that the high incidence of cutaneous melanoma in white persons in central Alabama is associated with a predominance of Irish and Scots descent. 相似文献74.
Long-term estrogen therapy worsens the behavioral and neuropathological consequences of chronic brain inflammation 总被引:1,自引:0,他引:1
Marriott LK Hauss-Wegrzyniak B Benton RS Vraniak PD Wenk GL 《Behavioral neuroscience》2002,116(5):902-911
Alzheimer's disease (AD) is accompanied by chronic neuroinflammation and occurs with greater incidence in postmenopausal women. The increased incidence may be delayed by estrogen replacement therapy (ERT). The authors investigated the interaction of chronic ERT and lipopolysaccharide (LPS)-induced neuroinflammation in the female rat. Ovariectomy did not impair water maze performance; however, addition of chronic ERT or neuroinflammation resulted in an impairment that became exacerbated by the simultaneous occurrence of both conditions. Chronic LPS activated microglia, which was not reduced by ERT. Intact females receiving LPS infusion were not impaired in the water maze and had significantly fewer activated microglia. Results suggest that chronic ERT in postmenopausal women may exacerbate the memory impairment induced by the chronic neuroinflammation associated with AD. 相似文献
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Jeremy Benton 《The Journal of school nursing》2003,19(5):251-259
This article describes some of the special health and safety concerns that many lesbian, gay, bisexual, and questioning youth face in schools. Among these problems are increased drug and alcohol use, sexually transmitted infections and pregnancy risks, depression and suicidality, and increased likelihood of being a victim of harassment or assault. School nurses can play a unique role in the lives of these students. A needs assessment is reviewed that describes school nurses' perceived professional responsibility and their actual practice with regard to lesbian, gay, bisexual, and questioning youth. Five barriers to optimal health care for these students are discussed. Methods that encourage students to view the school nurse as an ally, as well as issues surrounding disclosure or "coming out," are discussed. Special considerations of confidentiality, community agency referral, and family disclosure are discussed. Appropriate interventions at school and ways to begin to change the school climate are also presented. 相似文献
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Most of the popular press and professional journal coverage associated with Agenda for Change (DoH 1999a) has tended to focus on the terms and conditions of service. While this is clearly important, this article focuses on the possible longer term, cultural, career, service, education and regulatory impact of this initiative. 相似文献
79.
There have been previous reports that supplements of phosphatidylserine (PS) blunted the release of cortisol in response to exercise stress and that it improved mood. The present study extended these observations by considering whether PS supplementation influenced subjective feelings of stress and the change in heart rate when a stressful mental arithmetic task was performed. In young adults, with neuroticism scores above rather than below the median, the taking of 300mg PS each day for a month was associated with feeling less stressed and having a better mood. The study for the first time reports an improvement in mood following PS supplementation in a sub-group of young healthy adults. 相似文献
80.
Roxburgh CJ Ganellin CR Athmani S Bisi A Quaglia W Benton DC Shiner MA Malik-Hall M Haylett DG Jenkinson DH 《Journal of medicinal chemistry》2001,44(20):3244-3253
Cetiedil, [2-cyclohexyl-2-(3-thienyl)ethanoic acid 2-(hexahydro-1H-azepin-1-yl)ethyl ester], which blocks the intermediate calcium-activated potassium ion permeability (IK(Ca)) in red blood cells, was used as a lead for investigating structure-activity relationships with the aim of determining the pharmacophore and of synthesizing agents of greater potency. A series of compounds having structures related to cetiedil was made and tested on rabbit erythrocytes. Channel blocking activity within the series was found to correlate well with octanol-water partition coefficients but not with the specific chemical structure of the acid moiety. However, whereas log P for the compounds spans a range of values over 4 orders of magnitude, potency only increases by 2 orders. This suggests that hydrophobic interactions with an active site on the channel are probably not the main determinants of activity. It seems more likely that increased lipophilicity enhances access to the channel, probably from within the cell membrane. In keeping with this interpretation, cetiedil methoiodide was found to be inactive. Triphenylethanoic was found to be a more effective acid grouping than 2-cyclohexyl-2-(3-thienyl)ethanoic, and its 2-(hexahydro-1H-azepin-l-yl)ethyl ester (11) was approximately 3 times more potent than cetiedil. The 9-benzylfluoren-9-yl carboxylic acid ester (21) was found to be approximately 9 times more active than cetiedil, and replacing -CO(2)- in 21 by an ethynyl (-C identical to C-) linkage (compound 26, UCL 1608) increased potency by some 15-fold over that of cetiedil. 相似文献