Daniel Lechner

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BACKGROUND The pathogenesis and natural course of idiopathic upper extremity deep vein thrombosis (UEDVT) are unclear. OBJECTIVE To compare patients with UEDVT and with idiopathic lower extremity deep vein thrombosis (LEDVT) regarding risk factors and recurrence. METHODS We followed 50 patients with first idiopathic UEDVT and 841 patients with first(More)
BACKGROUND Cisplatin-based chemotherapy predisposes cancer patients to thromboembolic events. OBJECTIVES To investigate whether endothelial damage, via formation of procoagulant endothelial microparticles (EMPs), contributes to cisplatin-related hypercoagulability. METHODS Cell viability and caspase-3/7 activities were assessed in two endothelial cell(More)
Epidemiologic studies suggest that nutritional phytoestrogens contained in soy are causally related to protection against hormone-dependent cancers. The incidence of colorectal cancer is at least 30% lower in women than in men in the United States. This suggests that estrogen and, conceivably, nutritional phytoestrogens are protective compounds against(More)
The antimitotic and prodifferentiating 1alpha,25-dihydroxyvitamin D3 (1alpha,25-(OH)2D3), synthesized at various extrarenal sites could potentially prevent sporadic tumor development. Physiological regulation of extrarenal Vitamin D hydroxylases following tissue accumulation of 1alpha,25-(OH)2D3 is unknown. We therefore investigated basal and Vitamin(More)
While Vitamin D insufficiency in the US and European population is rising, epidemiological studies suggest an inverse correlation between low serum levels of 25-hydroxyvitamin D(3) (25-OH-D(3)) and colorectal cancer incidence. The antimitotic, prodifferentiating and proapoptotic active metabolite 1alpha,25-dihydroxyvitamin D(3) (1,25-(OH)(2)-D(3)) is(More)
Soybean products are highly represented in the traditional Asian diet. Major components of soy proteins are phytoestrogens, such as isoflavones. They may be responsible for the extremely low incidence of prostate and mammary tumors and possibly also of colon cancer in countries such as China and Japan. Serum 1,25-dihydroxyvitamin D3 level is inversely(More)
Because colorectal cancer (CRC) is a leading cause of cancer mortality in the Western industrialized world, future chemopreventive strategies will be of high socioeconomic importance. Lower CRC incidences in Far Eastern countries in part may be attributed to high nutritional intake of soy and its abundance in phytoestrogens. Phytoestrogens are plant-derived(More)
It was previously suggested that the 25-Vitamin-D3-1alpha-hydroxylase (CYP27B1) is downregulated during human prostate tumor pathogenesis while the catabolic 25-Vitamin-D3-24-hydroxylase (CYP24) expression is increased. The latter could lead to resistance against the antimitotic, pro-differentiating activity of 1,25-dihydroxycholecalciferol. Our hypothesis(More)
Upon stimulation or apoptosis, eukaryotic cells shed membrane vesicles of submicron size. These so-called microparticles (MPs) are detected and characterized based on the exposure of antigens characteristic of their respective parental cells and on the increased distribution of negatively charged phospholipids to the outer membrane layer. Among the various(More)
1alpha,25(OH)2D3 is a potent growth inhibitor of different cancer cell lines. The steroid hormone is not only synthesized in the kidney, but also at extrarenal sites. Unfortunately, this potential autocrine/paracrine defense mechanism is lost during the late stages of colon tumor progression. It is therefore desirable to find a pharmacological means to(More)