No evidence of endothelial dysfunction in patients with Alzheimer's disease

In view of accumulating evidence of vascular pathology in Alzheimer's disease (AD), we tested the hypothesis that AD patients have impaired endothelial function. This was assessed using the technique of strain-gauge venous occlusion plethysmography, which measures forearm blood flow (FBF). Intra-arterial (brachial) infusion of acetylcholine (ACh) and sodium nitroprusside (SNP) was used to assess local endothelial dependent and independent responses, respectively. There was no difference in the basal FBF of patients and controls. ACh and SNP caused dose-related increases in FBF from baseline, but no difference was recorded between the AD and control group. This study provides no evidence of endothelial dysfunction in the systemic circulation of patients with AD.

'Pues no entiendo tus palabras, / y tus bofetones siento': Linguistic Subversion in Lope de Vega's 'El perro del hortelano'

En los últimos años los críticos han dedicado mucha atención a la investigación de las voces conflictivas de la obra dramática de Lope de Vega. Se ha enfatizado en particular el papel subversivo de la lengua, sobre todo desde la perspectiva de la teoría de los actos de habla. Este artículo sobre El perro del hortelano opera dentro de un marco teórico similar para analizar cómo las retóricas poco estables del honor y del amor conducen a una desintegración de estos códigos artificiales linguísticos. Además, sugieren la presencia de una inestabilidad social colectiva más siniestra y más comprometida fuera del escenario. La ironía dramática, que sostiene el encubrimiento y la revelación de la 'verdad' a lo largo de la obra, lleva a un desenlace más liminal que cerrado y, quizás, permite la recuperación de unas voces significativas que penetren más allá del tiempo y la época en que fue escrita la obra.

'A terrible danger to the morals of the country': The Irish hospitals' sweepstake in Great Britain, 1930-87

This paper examines the importance of British contributions to the success of the Irish hospitals sweepstake. In its early years, up to three-quarters of these tickets were sold in Britain, bringing millions of pounds into Ireland annually to improve and expand the state's hospitals. The vast amount of money leaving Britain in this way angered the British government and forced it to introduce new legislation to curtail the activities of the Irish sweep. The paper will highlight the extent to which the success of the sweepstake depended on the market for tickets in Britain; the threat to the sweep's survival posed by the restriction of its activities in Britain after 1935; the role of the sweepstake controversy in exacerbating further already strained relations between Britain and the Irish Free State in the 1930s; how the success of the sweep raised the issue of legalising a British lottery; and the eventual decline of the sweepstake as a force in British gambling in the post-war years.

Modification of P13K- and MAPK-dependent chemotaxis in aortic vascular smooth muscle cells by protein kinase CBII

Hyperglycemia increases expression of platelet-derived growth factor (PDGF)-beta receptor and potentiates chemotaxis to PDGF-BB in human aortic vascular smooth muscle cells (VSMCs) via PI3K and ERK/MAPK signaling pathways. The purpose of this study was to determine whether increased activation of protein kinase C (PKC) isoforms had a modulatory effect on the PI3K and ERK/MAPK pathways, control of cell adhesiveness, and movement. All known PKC isoforms were assessed but only PKC alpha and PKC beta II levels were increased in 25 mmol/L glucose. However, only PKC beta II inhibition affected (decreased) PI3K pathway and MAPK pathway activities and inhibited PDGF-beta receptor upregulation in raised glucose, and specific MAPK inhibition was required to completely block the effect of glucose. In raised glucose conditions, activity of the ERK/MAPK pathway, PI3K pathway, and PKC beta II were all sensitive to aldose reductase inhibition. Chemotaxis to PDGF-BB (360 pmol/L), absent in 5 mmol/L glucose, was present in raised glucose and could be blocked by PKC beta II inhibition. Formation of lamellipodia was dependent on PI3K activation and filopodia on MAPK activation; both lamellipodia and filopodia were eliminated when PKC beta II was inhibited. FAK phosphorylation and cell adhesion were reduced by PI3K inhibition, and although MAPK inhibition prevented chemotaxis, it did not affect FAK phosphorylation or cell adhesiveness. In conclusion, chemotaxis to PDGF-BB in 25 mmol/L glucose is PKC beta II-dependent and requires activation of both the PI3K and MAPK pathways. Changes in cell adhesion and migration speed are mediated mainly through the PI3K pathway.

S XI emission lines in active region spectra obtained with the Solar EUV Rocket Telescope and Spectrograph (SERTS)

Theoretical electron density sensitive emission line ratios involving a total of eleven 2s(2)2p(2)-2s2p(3) transitions in S XI between 187 and 292 Angstrom are presented. A comparison of these with solar active region observations obtained during rocket flights by the Solar EUV Rocket Telescope and Spectrograph (SERTS) reveals generally good agreement between theory and experiment. However, the 186.87 Angstrom line is masked by fairly strong Fe XII emission at the same wavelength, while 239.83 Angstrom is blended with an unknown feature, and 285.58 Angstrom is blended with possibly N IV 285.56 Angstrom. In addition, the 191.23 Angstrom line appears to be more seriously blended with an Fe XIII feature than previously believed. The presence of several new S XI lines is confirmed in the SERTS spectra, at wavelengths of 188.66, 247.14 and 291.59 Angstrom, in excellent agreement with laboratory measurements. In particular, the detection of the 2s(2)2p(2) P- 3(1) -2s2p(3) P-3(0,1) transitions at 242.91 Angstrom is the first time (to our knowledge) that this feature has been identified in the solar spectrum. The potential usefulness of the S XI line ratios as electron density diagnostics for the solar transition region and corona is briefly discussed.