Androgens produce nongenomic effects in several cells by different mechanisms, including ion channel modulation. Adenohypophyseal cells express several K+ channels, including voltage and Ca2+-dependent K+ (BK) channels, which might be the target of androgens to modulate cellular action potentials and hormonal secretion. Androgen effects were studied in GH3… (More)
INTRODUCTION Matrix metalloproteinases (MMPs) play a role in infectious diseases through extracellular matrix (ECM) degradation, which favors the migration of immune cells from the bloodstream to sites of inflammation. Although higher levels of MMP-9 and tissue inhibitor of matrix metalloproteinases-1 (TIMP-1) have been found in small series of patients… (More)
—A study of time dispersion in different indoor line-of-sight radio channels in the 492–862 MHz band is presented in this paper. A combined method to filter the noise in the measured impulse response is described. The effect of frequency windowing on the impulse responses and the root mean square (rms) delay spread is also investigated. It has been found… (More)
We describe a ganglioglioma with atypical radiological appearances, in an uncommon location. CT showed a nonenhancing low-density lesion without calcification. On MRI the lesion gave nonspecific low signal on T1-weighted images and high signal on T2-weighted images. The tumour was in the right frontal lobe, producing bulging and thinning of the calvarium.