MHC class I proteins mediate a variety of functions in antiviral defense. In humans and mice, three MHC class I loci each contribute one or two alleles and each can present a wide variety of peptide Ags. In contrast, many lower vertebrates appear to use a single MHC class I locus. Previously we showed that a single locus was predominantly expressed in the mallard duck (Anas platyrhynchos) and t...

Enteroendocrine cells are solitary epithelial cells scattered throughout the gastrointestinal tract and produce various types of hormones, constituting one of the largest endocrine systems in the body. The study of these rare epithelial cells has been hampered by the difficulty in isolating them because of the lack of specific cell surface markers. Here, we report that enteroendocrine cells sel...

Distinct glycoconjugate expression between dome enterocytes and villus enterocytes in ileum from twelve 3-week-old conventional pigs was examined by the use of twenty one biotinylated lectins with avidin-biotin-peroxidase complex method. Three patterns of staining were seen. First, lectins bind to dome enterocyte and villus enterocyte to approximately equal staining, i.e. DSL, WGA, s-WGA and Co...

Contrast-enhanced ultrasound imaging is a radiation-free clinical diagnostic tool that uses biocompatible contrast agents to enhance signal, in order improve image clarity and performance. Ultrasound enhancing (UEA), which are usually gas microbubbles, administered intravenously either by bolus injection or continuous infusion. UEA increase the accuracy reliability of echocardiography, leading ...

A new monoclonal antibody, QB-END/10, raised against the CD34 antigen in human endothelial cell membranes and haemopoietic progenitor cells, was studied for its usefulness as a marker of neoplastic vascular cells in 21 angiosarcomas and seven malignant haemangioendotheliomas of the liver. QB-END/10 was both more sensitive and more specific than Von Willebrand factor (VWF) and Ulex europaeus 1 a...

Chronically implantable wireless neural interface devices require biocompatible and stable high density integration of several components such as sensing elements, data processors, communication, and power supply coils. Biocompatible integration technology has been developed for Utah Electrode Array (UEA) based implantable neural interface devices. These interface devices comprise: silicon base...

The brain from a Siamese cat with sphingomyelinosis was examined with lectin histochemistry. Swollen neurons were stained with Canavalia ensiformis agglutinin (Con A). Some of them were also stained with Ricinus communis agglutinin-I (RCA-I) and Ulex europaeus agglutinin-I (UEA-I). A small number of axonal spheroids and glia cells were positive for Con A, RCA-I, UEA-I and wheat germ agglutinin....

Este trabalho discorre sobre a utilização da plataforma Moodle para criação de ambientes virtuais aprendizagem, com ênfase no e-learning, um modelo ensino não presencial apoiado em Tecnologias Digitais Informação e Comunicação (TDICs), trazendo uma reflexão acerca do uso prático e-learning como alternativa ao presencial, na Universidade Estado Amazonas (UEA), que consequência pandemia COVID-19,...

When Ulex europeus agglutinin I (UEA) conjugated with fluorescein isothiocyanate is applied to tissue sections from the cutaneous epidermis of the newborn rat, the lectin binds to the surfaces of cells in the layer immediately above the basal layer but not to the cells in the basal layer itself. The latter cells bind the isolectin I-B4, from Griffonia simplicifolia (GS I-B4). The addition of a ...