brush border


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border

 [bor´der]
a bounding line, edge, or surface.
brush border a specialization of the free surface of a cell, consisting of minute cylindrical processes (microvilli) that greatly increase the surface area.
Brush border, characterized by closely packed microvilli. From Dorland's, 2000.
vermilion border the exposed red portion of the upper and lower lips.

brush bor·der

the apical epithelial surface bearing closely packed microvilli about 2 mcm long, such as occur on the cells of the proximal tubule of the nephron.
Synonym(s): limbus penicillatus

brush border

microvilli on the free surfaces of certain epithelial cells, particularly the absorptive surfaces of the intestine and the proximal convoluted tubules of the kidney.
A specialized portion of the free or apical aspect of certain epithelial cells—e.g., of the GI tract—consisting of closely packed microvilli that facilitate absorption; brush border cells line the luminal surface of the intestine and proximal convoluted tubules of the kidneys; the BB contains absorptive microvilli and glycocalyx—which is rich in hydrolytic enzymes

brush border

Physiology A specialized portion of the free or apical aspect of certain epithelial cells–eg, of the GI tract, consisting of closely packed microvilli that facilitate absorption; brush border cells line the luminal surface of the intestine and proximal convoluted tubules of the kidneys; the BB contains absorptive microvilli and glycocalyx–which is rich in hydrolytic enzymes

brush bor·der

(brŭsh bōr'dĕr)
An epithelial surface bearing closely packed microvilli about 2 mcm long, such as occurs in the proximal tubule of the nephron.

brush border

see MICROVILLUS.

brush border

a specialization of the free surface of a cell, consisting of minute cylindrical processes (microvilli) that greatly increase the surface area.

brush border enzymes
include maltase, lactase, α-dextrinase and peptidases. Deficiencies of these enzymes may be primary or, more often, secondary to other intestinal disease.
References in periodicals archive ?
Brush border membrane vesicles (BBMV) from rat jejunum were prepared according to the calcium chloride precipitation method (Kessler et al.
It has been suggested that the brush border cytoskeleton is responsible for the shape, stability and motility of microvilli, composed mainly of actin, myosin and filament binding proteins (Mooseker, 1985).
Isolation and characterization of brush border membrane vesicles from bovine small intestine.
Furthermore, when 2 to 3 yr-old sheep were intraduodenally infused with a 30 mM glucose solution for 4 d, glucose transporter activity in brush border membrane vesicles increased 40 to 80-fold.
Part of this is focally lost and the rest is absorbed into the brush border of the intestinal enterocytes, and ultimately into the blood.
These can stomp down the brush border * so carbohydrates and sugars can't be absorbed correctly.
By technique SDS-PAGE (Figure 1) the black arrows are profile protein the expression of intestinal protein brush border before inducing LPS E.
Top with the ham, brush borders with beaten egg and bake for 15 mins at 220C/Gas 7.