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IGF-1 has been associated with the pathogenesis of diabetic retinopathy, although its role is not fully understood. Here we show that normoglycemic/normoinsulinemic transgenic mice overexpressing IGF-1 in the retina developed most alterations seen in human diabetic eye disease. A paracrine effect of IGF-1 in the retina initiated vascular alterations that(More)
Patients with type 1 diabetes are identified after the onset of the disease, when beta cell destruction is almost complete. beta cell regeneration from islet cell precursors might reverse this disease, but factors that can induce beta cell neogenesis and replication and prevent a new round of autoimmune destruction remain to be identified. Here we show that(More)
The gene encoding cytochrome c nitrite reductase (NrfA) from Desulfovibrio desulfuricans ATCC 27774 was sequenced and the crystal structure of the enzyme was determined to 2.3-A resolution. In comparison with homologous structures, it presents structural differences mainly located at the regions surrounding the putative substrate inlet and product outlet,(More)
BACKGROUND The lower respiratory tract is a latency site of Epstein-Barr virus (EBV); however, its pathogenic role is poorly known, particularly in transplant patients. The aim of this study was to evaluate the prevalence and role of EBV in bronchoalveolar lavages (BAL) from transplant recipients (TR) in comparison with nontransplant (NT) patients. (More)
The aim of this study was to evaluate the endogenous alterations of the antioxidant enzymes in tumor cells and to specifically compensate the resulting changes in the levels of reactive oxygen species (ROS) to control the malignant growth. We determined and compared the activities of antioxidant enzymes and the levels of superoxide anion (O2*-) and hydrogen(More)
We report the evaluation of the floral origin of honey by analysis of its volatile organic compounds (VOCs) profile, joined with the use of combined pattern recognition techniques. Honey samples, from five floral origins, were analyzed by headspace solid-phase microextraction-gas chromatography-mass spectrometry, selecting 35 VOCs out of the entire(More)
Rapid detection and subtyping of H5 and H7 subtypes influenza A viruses are important for disease control in poultry and potential transmission to humans. Currently, virus isolation and subsequent HA and NA subtyping constitute the standard for avian influenza viruses detection and subtype identification. These methods are highly accurate and sensitive but(More)
Among solid-organ recipients, those with lung transplants are at highest risk of cytomegalovirus (CMV) infection or to die of CMV-associated disease. We evaluated the effect of combined CMV antiviral prophylaxis and CMV-immunoglobulin prophylaxis on CMV-associated pneumonia diagnosed in 303 follow-up transbronchial biopsy (TBB) specimens from lung(More)
BACKGROUND BK virus-associated nephropathy (BKVAN) is one of the most common viral diseases affecting renal allografts. Screening for viral replication may allow for earlier intervention with reduced allograft loss. A plasma viral load >10(4) copies/mL of BKV DNA is recommended for a presumed diagnosis of BKVAN. METHODS We monitored BKV load on serum and(More)
We report on the development of a novel alternative method for the assessment of floral origin in honey samples based on the study of honey proteins using immunoblot assays. The main goal of our work was to evaluate the use of honey proteins as chemical markers of the floral origin of honey. Considering that honeybee proteins should be common to all types(More)