释义 |
brush border in British Englishnoun physiology a layer of tightly packed minute finger-like protuberances on cells that line absorptive surfaces, such as those ofthe intestine and kidney See also microvillus brush border in American EnglishnounAnatomy a dense array of microvilli projecting from the surface of certain epithelial tissues, as the lining of the intestinal tract Word origin [1900–05 ]This word is first recorded in the period 1900–05. Other words that entered Englishat around the same time include: cathode-ray tube, clone, decompression, geopolitics, hookupExamples of 'brush border' in a sentencebrush border Brush border have distinctive transport system for amino acids and di-tripeptides.Transmission electron microscopy revealed the presence of brush border microvilli and tight intercellular contacts.Specific activities of digestive enzymes were determined in brush border membrane vesicles of jejunal enterocytes.Pronephric cells maintain adherens junctions and polarized apical brush border membranes while they migrate collectively.Immunofluorescence staining of meprin β in kidney sections confirmed the expression of the protease in the kidney brush-border membrane.These fimbriae adhere to specific receptors on porcine intestinal brush border epithelial cells (enterocytes), starting the process of enteric infection.The intestine contains 11-15 pyloric caeca, a simple prismatic epithelium with brush border, goblet cells and lymphocytes.Formation of microvillus inclusions from multiple membrane sources showed an unexpected dynamic of the enterocyte brush border.This includes establishment of self-renewing epithelial cells raised from tissue, which express differentiation markers, including the brush border enzymes.Brush border epithelial cells were replaced with infiltration of lymphocytes, granulocytes, and microabscess formations into cryptic microstructures. |