Dixan A Benitez

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Prostate cancer represents a major concern in human oncology and the phytoalexin resveratrol (RES) inhibits growth and proliferation of prostate cancer cells through the induction of apoptosis. In addition, previous data indicate that in oestrogen-responsive human breast cancer cells, RES induces apoptosis by inhibition of the phosphoinositide-3-kinase(More)
Alterations in tissue-specific gene expression greatly affect cell function. Transcription factors (TFs) interact with cis-acting binding sites in noncoding enhancer promoter regions. Transposable elements (TEs) are abundant and similarly represented among mammalian genomes. TEs are important in gene regulation, but their function is not well understood. We(More)
Resveratrol is a polyphenol found at high concentrations in grapes and red wine with reported anticarcinogenic effects. We studied the molecular mechanism of resveratrol-induced apoptosis and proliferation arrest in prostate derived cells PZ-HPV-7 (nontumorigenic line), LNCaP (androgen-sensitive cancer line), and PC-3 (androgen-insensitive cancer line).(More)
OBJECTIVE To investigate the haemodynamic effects of varying the angle of head up tilt. METHODS 20 healthy subjects (12 female, eight male; mean (SD) age 33.6 (8.4) years) underwent head up tilt for five minutes to each of four angles of tilt in random order, with a five minute rest period at the horizontal between each angle. Forearm blood flow was(More)
Previous studies have shown that acute hypobaric hypoxia, obtained in a hypobaric chamber, and subsequent reoxygenation, give rise to modifications of the erythrocyte membrane lipid dynamics, resulting in an increased lateral diffusivity of the membrane lipids, and this was interpreted as the result of a modified lipid-protein interaction. The aim of the(More)
The main objective of this study was to evaluate the influence of the products secreted by the human embryo upon the three subtypes of beta-AR (beta1, beta2, beta3). Cell cultures were developed using endometrial biopsies, taken on day 7 after ovulation, from four healthy women <35 years of age, with regular cycles and infertility due only to male factors.(More)
Contradictory data have been reported regarding the effect of GnRH agonists and antagonists on cell growth and survival, using prostate cancer-derived cell lines expressing either endogenous or exogenous GnRH receptors. We addressed the issue studying the effect of leuprolide (agonist) and cetrorelix (antagonist) on cell growth, apoptosis and GnRH receptor(More)
BACKGROUND Polyphenols have been proposed as antitumoral agents. We have shown that resveratrol (RES) induced cell cycle arrest and promoted apoptosis in prostate cancer cells by inhibition of the PI3K pathway. The RES effects on NF kappaB activity in LNCaP cells (inducible NF kappaB), and PC-3 cells (constitutive NF kappaB) are reported. METHODS Cells(More)
BACKGROUND GnRH analogs have antiproliferative and/or apoptotic effects on prostate cancer cells. Also, neurotrophin receptors TrkA and p75 have been reported in normal prostate suggesting a role in the gland growth control. In prostate cancer, TrkA receptors seem to be overexpressed and p75 receptors show a decreased expression. These changes in(More)
Airway inflammation is a common condition where glucocorticoids (GC) are a well-established therapy. It has been demonstrated that GC stimulate components of innate immunity. Specifically, GC up-regulate TLR2 expression and activation upon inflammatory stimuli; however, little is known about the signalling involved in this process. To determine the(More)